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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tcl_base/tclvar.c,v 1.1.1.1 2001/06/13 04:48:07 dtashley Exp $ */ |
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/* |
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* tclVar.c -- |
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* |
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* This file contains routines that implement Tcl variables |
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* (both scalars and arrays). |
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* |
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* The implementation of arrays is modelled after an initial |
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* implementation by Mark Diekhans and Karl Lehenbauer. |
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* |
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* Copyright (c) 1987-1994 The Regents of the University of California. |
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* Copyright (c) 1994-1997 Sun Microsystems, Inc. |
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* Copyright (c) 1998-1999 by Scriptics Corporation. |
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* |
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* See the file "license.terms" for information on usage and redistribution |
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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* |
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* RCS: @(#) $Id: tclvar.c,v 1.1.1.1 2001/06/13 04:48:07 dtashley Exp $ |
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*/ |
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#include "tclInt.h" |
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#include "tclPort.h" |
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/* |
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* The strings below are used to indicate what went wrong when a |
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* variable access is denied. |
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*/ |
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static char *noSuchVar = "no such variable"; |
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static char *isArray = "variable is array"; |
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static char *needArray = "variable isn't array"; |
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static char *noSuchElement = "no such element in array"; |
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static char *danglingElement = "upvar refers to element in deleted array"; |
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static char *danglingVar = "upvar refers to variable in deleted namespace"; |
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static char *badNamespace = "parent namespace doesn't exist"; |
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static char *missingName = "missing variable name"; |
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static char *isArrayElement = "name refers to an element in an array"; |
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/* |
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* Forward references to procedures defined later in this file: |
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*/ |
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static char * CallTraces _ANSI_ARGS_((Interp *iPtr, Var *arrayPtr, |
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Var *varPtr, char *part1, char *part2, |
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int flags)); |
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static void CleanupVar _ANSI_ARGS_((Var *varPtr, |
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Var *arrayPtr)); |
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static void DeleteSearches _ANSI_ARGS_((Var *arrayVarPtr)); |
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static void DeleteArray _ANSI_ARGS_((Interp *iPtr, |
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char *arrayName, Var *varPtr, int flags)); |
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static int MakeUpvar _ANSI_ARGS_(( |
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Interp *iPtr, CallFrame *framePtr, |
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char *otherP1, char *otherP2, int otherFlags, |
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char *myName, int myFlags)); |
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static Var * NewVar _ANSI_ARGS_((void)); |
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static ArraySearch * ParseSearchId _ANSI_ARGS_((Tcl_Interp *interp, |
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Var *varPtr, char *varName, char *string)); |
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static void VarErrMsg _ANSI_ARGS_((Tcl_Interp *interp, |
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char *part1, char *part2, char *operation, |
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char *reason)); |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* TclLookupVar -- |
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* |
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* This procedure is used by virtually all of the variable code to |
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* locate a variable given its name(s). |
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* |
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* Results: |
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* The return value is a pointer to the variable structure indicated by |
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* part1 and part2, or NULL if the variable couldn't be found. If the |
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* variable is found, *arrayPtrPtr is filled in with the address of the |
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* variable structure for the array that contains the variable (or NULL |
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* if the variable is a scalar). If the variable can't be found and |
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* either createPart1 or createPart2 are 1, a new as-yet-undefined |
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* (VAR_UNDEFINED) variable structure is created, entered into a hash |
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* table, and returned. |
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* |
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* If the variable isn't found and creation wasn't specified, or some |
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* other error occurs, NULL is returned and an error message is left in |
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* the interp's result if TCL_LEAVE_ERR_MSG is set in flags. |
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* |
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* Note: it's possible for the variable returned to be VAR_UNDEFINED |
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* even if createPart1 or createPart2 are 1 (these only cause the hash |
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* table entry or array to be created). For example, the variable might |
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* be a global that has been unset but is still referenced by a |
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* procedure, or a variable that has been unset but it only being kept |
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* in existence (if VAR_UNDEFINED) by a trace. |
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* |
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* Side effects: |
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* New hashtable entries may be created if createPart1 or createPart2 |
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* are 1. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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Var * |
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TclLookupVar(interp, part1, part2, flags, msg, createPart1, createPart2, |
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arrayPtrPtr) |
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Tcl_Interp *interp; /* Interpreter to use for lookup. */ |
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register char *part1; /* If part2 isn't NULL, this is the name of |
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* an array. Otherwise, this |
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* is a full variable name that could |
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* include a parenthesized array element. */ |
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char *part2; /* Name of element within array, or NULL. */ |
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int flags; /* Only TCL_GLOBAL_ONLY, TCL_NAMESPACE_ONLY, |
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* and TCL_LEAVE_ERR_MSG bits matter. */ |
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char *msg; /* Verb to use in error messages, e.g. |
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* "read" or "set". Only needed if |
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* TCL_LEAVE_ERR_MSG is set in flags. */ |
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int createPart1; /* If 1, create hash table entry for part 1 |
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* of name, if it doesn't already exist. If |
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* 0, return error if it doesn't exist. */ |
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int createPart2; /* If 1, create hash table entry for part 2 |
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* of name, if it doesn't already exist. If |
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* 0, return error if it doesn't exist. */ |
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Var **arrayPtrPtr; /* If the name refers to an element of an |
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* array, *arrayPtrPtr gets filled in with |
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* address of array variable. Otherwise |
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* this is set to NULL. */ |
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{ |
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Interp *iPtr = (Interp *) interp; |
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CallFrame *varFramePtr = iPtr->varFramePtr; |
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/* Points to the procedure call frame whose |
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* variables are currently in use. Same as |
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* the current procedure's frame, if any, |
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* unless an "uplevel" is executing. */ |
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Tcl_HashTable *tablePtr; /* Points to the hashtable, if any, in which |
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* to look up the variable. */ |
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Tcl_Var var; /* Used to search for global names. */ |
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Var *varPtr; /* Points to the Var structure returned for |
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* the variable. */ |
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char *elName; /* Name of array element or NULL; may be |
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* same as part2, or may be openParen+1. */ |
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char *openParen, *closeParen; |
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/* If this procedure parses a name into |
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* array and index, these point to the |
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* parens around the index. Otherwise they |
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* are NULL. These are needed to restore |
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* the parens after parsing the name. */ |
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Namespace *varNsPtr, *cxtNsPtr, *dummy1Ptr, *dummy2Ptr; |
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ResolverScheme *resPtr; |
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Tcl_HashEntry *hPtr; |
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register char *p; |
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int new, i, result; |
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varPtr = NULL; |
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*arrayPtrPtr = NULL; |
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openParen = closeParen = NULL; |
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varNsPtr = NULL; /* set non-NULL if a nonlocal variable */ |
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/* |
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* Parse part1 into array name and index. |
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* Always check if part1 is an array element name and allow it only if |
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* part2 is not given. |
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* (if one does not care about creating array elements that can't be used |
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* from tcl, and prefer slightly better performance, one can put |
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* the following in an if (part2 == NULL) { ... } block and remove |
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* the part2's test and error reporting or move that code in array set) |
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*/ |
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elName = part2; |
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for (p = part1; *p ; p++) { |
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if (*p == '(') { |
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openParen = p; |
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do { |
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p++; |
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} while (*p != '\0'); |
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p--; |
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if (*p == ')') { |
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if (part2 != NULL) { |
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openParen = NULL; |
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if (flags & TCL_LEAVE_ERR_MSG) { |
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VarErrMsg(interp, part1, part2, msg, needArray); |
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} |
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goto done; |
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} |
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closeParen = p; |
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*openParen = 0; |
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elName = openParen+1; |
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} else { |
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openParen = NULL; |
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} |
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break; |
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} |
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} |
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/* |
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* If this namespace has a variable resolver, then give it first |
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* crack at the variable resolution. It may return a Tcl_Var |
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* value, it may signal to continue onward, or it may signal |
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* an error. |
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*/ |
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if ((flags & TCL_GLOBAL_ONLY) != 0 || iPtr->varFramePtr == NULL) { |
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cxtNsPtr = iPtr->globalNsPtr; |
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} else { |
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cxtNsPtr = iPtr->varFramePtr->nsPtr; |
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} |
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if (cxtNsPtr->varResProc != NULL || iPtr->resolverPtr != NULL) { |
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resPtr = iPtr->resolverPtr; |
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if (cxtNsPtr->varResProc) { |
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result = (*cxtNsPtr->varResProc)(interp, part1, |
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(Tcl_Namespace *) cxtNsPtr, flags, &var); |
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} else { |
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result = TCL_CONTINUE; |
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} |
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while (result == TCL_CONTINUE && resPtr) { |
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if (resPtr->varResProc) { |
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result = (*resPtr->varResProc)(interp, part1, |
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(Tcl_Namespace *) cxtNsPtr, flags, &var); |
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} |
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resPtr = resPtr->nextPtr; |
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} |
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if (result == TCL_OK) { |
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varPtr = (Var *) var; |
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goto lookupVarPart2; |
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} else if (result != TCL_CONTINUE) { |
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return (Var *) NULL; |
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} |
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} |
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/* |
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* Look up part1. Look it up as either a namespace variable or as a |
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* local variable in a procedure call frame (varFramePtr). |
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* Interpret part1 as a namespace variable if: |
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* 1) so requested by a TCL_GLOBAL_ONLY or TCL_NAMESPACE_ONLY flag, |
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* 2) there is no active frame (we're at the global :: scope), |
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* 3) the active frame was pushed to define the namespace context |
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* for a "namespace eval" or "namespace inscope" command, |
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* 4) the name has namespace qualifiers ("::"s). |
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* Otherwise, if part1 is a local variable, search first in the |
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* frame's array of compiler-allocated local variables, then in its |
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* hashtable for runtime-created local variables. |
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* |
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* If createPart1 and the variable isn't found, create the variable and, |
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* if necessary, create varFramePtr's local var hashtable. |
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*/ |
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if (((flags & (TCL_GLOBAL_ONLY | TCL_NAMESPACE_ONLY)) != 0) |
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|| (varFramePtr == NULL) |
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|| !varFramePtr->isProcCallFrame |
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|| (strstr(part1, "::") != NULL)) { |
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char *tail; |
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/* |
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* Don't pass TCL_LEAVE_ERR_MSG, we may yet create the variable, |
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* or otherwise generate our own error! |
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*/ |
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var = Tcl_FindNamespaceVar(interp, part1, (Tcl_Namespace *) NULL, |
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flags & ~TCL_LEAVE_ERR_MSG); |
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if (var != (Tcl_Var) NULL) { |
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varPtr = (Var *) var; |
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} |
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if (varPtr == NULL) { |
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if (createPart1) { /* var wasn't found so create it */ |
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TclGetNamespaceForQualName(interp, part1, (Namespace *) NULL, |
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flags, &varNsPtr, &dummy1Ptr, &dummy2Ptr, &tail); |
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if (varNsPtr == NULL) { |
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if (flags & TCL_LEAVE_ERR_MSG) { |
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VarErrMsg(interp, part1, part2, msg, badNamespace); |
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} |
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goto done; |
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} |
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if (tail == NULL) { |
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if (flags & TCL_LEAVE_ERR_MSG) { |
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VarErrMsg(interp, part1, part2, msg, missingName); |
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} |
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goto done; |
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} |
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hPtr = Tcl_CreateHashEntry(&varNsPtr->varTable, tail, &new); |
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varPtr = NewVar(); |
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Tcl_SetHashValue(hPtr, varPtr); |
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varPtr->hPtr = hPtr; |
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varPtr->nsPtr = varNsPtr; |
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} else { /* var wasn't found and not to create it */ |
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if (flags & TCL_LEAVE_ERR_MSG) { |
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VarErrMsg(interp, part1, part2, msg, noSuchVar); |
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} |
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goto done; |
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} |
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} |
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} else { /* local var: look in frame varFramePtr */ |
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Proc *procPtr = varFramePtr->procPtr; |
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int localCt = procPtr->numCompiledLocals; |
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CompiledLocal *localPtr = procPtr->firstLocalPtr; |
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Var *localVarPtr = varFramePtr->compiledLocals; |
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int part1Len = strlen(part1); |
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for (i = 0; i < localCt; i++) { |
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if (!TclIsVarTemporary(localPtr)) { |
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register char *localName = localVarPtr->name; |
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if ((part1[0] == localName[0]) |
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&& (part1Len == localPtr->nameLength) |
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&& (strcmp(part1, localName) == 0)) { |
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varPtr = localVarPtr; |
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break; |
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} |
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} |
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localVarPtr++; |
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localPtr = localPtr->nextPtr; |
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} |
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if (varPtr == NULL) { /* look in the frame's var hash table */ |
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tablePtr = varFramePtr->varTablePtr; |
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if (createPart1) { |
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if (tablePtr == NULL) { |
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tablePtr = (Tcl_HashTable *) |
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ckalloc(sizeof(Tcl_HashTable)); |
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Tcl_InitHashTable(tablePtr, TCL_STRING_KEYS); |
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varFramePtr->varTablePtr = tablePtr; |
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|
} |
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hPtr = Tcl_CreateHashEntry(tablePtr, part1, &new); |
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if (new) { |
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varPtr = NewVar(); |
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Tcl_SetHashValue(hPtr, varPtr); |
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varPtr->hPtr = hPtr; |
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varPtr->nsPtr = NULL; /* a local variable */ |
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} else { |
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varPtr = (Var *) Tcl_GetHashValue(hPtr); |
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|
} |
|
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} else { |
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hPtr = NULL; |
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if (tablePtr != NULL) { |
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hPtr = Tcl_FindHashEntry(tablePtr, part1); |
|
|
} |
|
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if (hPtr == NULL) { |
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|
if (flags & TCL_LEAVE_ERR_MSG) { |
|
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VarErrMsg(interp, part1, part2, msg, noSuchVar); |
|
|
} |
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goto done; |
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|
} |
|
|
varPtr = (Var *) Tcl_GetHashValue(hPtr); |
|
|
} |
|
|
} |
|
|
} |
|
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|
|
|
lookupVarPart2: |
|
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if (openParen != NULL) { |
|
|
*openParen = '('; |
|
|
openParen = NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
* If varPtr is a link variable, we have a reference to some variable |
|
|
* that was created through an "upvar" or "global" command. Traverse |
|
|
* through any links until we find the referenced variable. |
|
|
*/ |
|
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|
|
|
while (TclIsVarLink(varPtr)) { |
|
|
varPtr = varPtr->value.linkPtr; |
|
|
} |
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|
|
|
/* |
|
|
* If we're not dealing with an array element, return varPtr. |
|
|
*/ |
|
|
|
|
|
if (elName == NULL) { |
|
|
goto done; |
|
|
} |
|
|
|
|
|
/* |
|
|
* We're dealing with an array element. Make sure the variable is an |
|
|
* array and look up the element (create the element if desired). |
|
|
*/ |
|
|
|
|
|
if (TclIsVarUndefined(varPtr) && !TclIsVarArrayElement(varPtr)) { |
|
|
if (!createPart1) { |
|
|
if (flags & TCL_LEAVE_ERR_MSG) { |
|
|
VarErrMsg(interp, part1, part2, msg, noSuchVar); |
|
|
} |
|
|
varPtr = NULL; |
|
|
goto done; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Make sure we are not resurrecting a namespace variable from a |
|
|
* deleted namespace! |
|
|
*/ |
|
|
if ((varPtr->flags & VAR_IN_HASHTABLE) && (varPtr->hPtr == NULL)) { |
|
|
if (flags & TCL_LEAVE_ERR_MSG) { |
|
|
VarErrMsg(interp, part1, part2, msg, danglingVar); |
|
|
} |
|
|
varPtr = NULL; |
|
|
goto done; |
|
|
} |
|
|
|
|
|
TclSetVarArray(varPtr); |
|
|
TclClearVarUndefined(varPtr); |
|
|
varPtr->value.tablePtr = |
|
|
(Tcl_HashTable *) ckalloc(sizeof(Tcl_HashTable)); |
|
|
Tcl_InitHashTable(varPtr->value.tablePtr, TCL_STRING_KEYS); |
|
|
} else if (!TclIsVarArray(varPtr)) { |
|
|
if (flags & TCL_LEAVE_ERR_MSG) { |
|
|
VarErrMsg(interp, part1, part2, msg, needArray); |
|
|
} |
|
|
varPtr = NULL; |
|
|
goto done; |
|
|
} |
|
|
*arrayPtrPtr = varPtr; |
|
|
if (closeParen != NULL) { |
|
|
*closeParen = 0; |
|
|
} |
|
|
if (createPart2) { |
|
|
hPtr = Tcl_CreateHashEntry(varPtr->value.tablePtr, elName, &new); |
|
|
if (closeParen != NULL) { |
|
|
*closeParen = ')'; |
|
|
} |
|
|
if (new) { |
|
|
if (varPtr->searchPtr != NULL) { |
|
|
DeleteSearches(varPtr); |
|
|
} |
|
|
varPtr = NewVar(); |
|
|
Tcl_SetHashValue(hPtr, varPtr); |
|
|
varPtr->hPtr = hPtr; |
|
|
varPtr->nsPtr = varNsPtr; |
|
|
TclSetVarArrayElement(varPtr); |
|
|
} |
|
|
} else { |
|
|
hPtr = Tcl_FindHashEntry(varPtr->value.tablePtr, elName); |
|
|
if (closeParen != NULL) { |
|
|
*closeParen = ')'; |
|
|
} |
|
|
if (hPtr == NULL) { |
|
|
if (flags & TCL_LEAVE_ERR_MSG) { |
|
|
VarErrMsg(interp, part1, part2, msg, noSuchElement); |
|
|
} |
|
|
varPtr = NULL; |
|
|
goto done; |
|
|
} |
|
|
} |
|
|
varPtr = (Var *) Tcl_GetHashValue(hPtr); |
|
|
|
|
|
done: |
|
|
if (openParen != NULL) { |
|
|
*openParen = '('; |
|
|
} |
|
|
return varPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_GetVar -- |
|
|
* |
|
|
* Return the value of a Tcl variable as a string. |
|
|
* |
|
|
* Results: |
|
|
* The return value points to the current value of varName as a string. |
|
|
* If the variable is not defined or can't be read because of a clash |
|
|
* in array usage then a NULL pointer is returned and an error message |
|
|
* is left in the interp's result if the TCL_LEAVE_ERR_MSG flag is set. |
|
|
* Note: the return value is only valid up until the next change to the |
|
|
* variable; if you depend on the value lasting longer than that, then |
|
|
* make yourself a private copy. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
char * |
|
|
Tcl_GetVar(interp, varName, flags) |
|
|
Tcl_Interp *interp; /* Command interpreter in which varName is |
|
|
* to be looked up. */ |
|
|
char *varName; /* Name of a variable in interp. */ |
|
|
int flags; /* OR-ed combination of TCL_GLOBAL_ONLY, |
|
|
* TCL_NAMESPACE_ONLY or TCL_LEAVE_ERR_MSG |
|
|
* bits. */ |
|
|
{ |
|
|
return Tcl_GetVar2(interp, varName, (char *) NULL, flags); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_GetVar2 -- |
|
|
* |
|
|
* Return the value of a Tcl variable as a string, given a two-part |
|
|
* name consisting of array name and element within array. |
|
|
* |
|
|
* Results: |
|
|
* The return value points to the current value of the variable given |
|
|
* by part1 and part2 as a string. If the specified variable doesn't |
|
|
* exist, or if there is a clash in array usage, then NULL is returned |
|
|
* and a message will be left in the interp's result if the |
|
|
* TCL_LEAVE_ERR_MSG flag is set. Note: the return value is only valid |
|
|
* up until the next change to the variable; if you depend on the value |
|
|
* lasting longer than that, then make yourself a private copy. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
char * |
|
|
Tcl_GetVar2(interp, part1, part2, flags) |
|
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
|
|
* to be looked up. */ |
|
|
char *part1; /* Name of an array (if part2 is non-NULL) |
|
|
* or the name of a variable. */ |
|
|
char *part2; /* If non-NULL, gives the name of an element |
|
|
* in the array part1. */ |
|
|
int flags; /* OR-ed combination of TCL_GLOBAL_ONLY, |
|
|
* TCL_NAMESPACE_ONLY and TCL_LEAVE_ERR_MSG |
|
|
* bits. */ |
|
|
{ |
|
|
Tcl_Obj *objPtr; |
|
|
|
|
|
objPtr = Tcl_GetVar2Ex(interp, part1, part2, flags); |
|
|
if (objPtr == NULL) { |
|
|
return NULL; |
|
|
} |
|
|
return TclGetString(objPtr); |
|
|
} |
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_ObjGetVar2 -- |
|
|
* |
|
|
* Return the value of a Tcl variable as a Tcl object, given a |
|
|
* two-part name consisting of array name and element within array. |
|
|
* |
|
|
* Results: |
|
|
* The return value points to the current object value of the variable |
|
|
* given by part1Ptr and part2Ptr. If the specified variable doesn't |
|
|
* exist, or if there is a clash in array usage, then NULL is returned |
|
|
* and a message will be left in the interpreter's result if the |
|
|
* TCL_LEAVE_ERR_MSG flag is set. |
|
|
* |
|
|
* Side effects: |
|
|
* The ref count for the returned object is _not_ incremented to |
|
|
* reflect the returned reference; if you want to keep a reference to |
|
|
* the object you must increment its ref count yourself. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
Tcl_Obj * |
|
|
Tcl_ObjGetVar2(interp, part1Ptr, part2Ptr, flags) |
|
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
|
|
* to be looked up. */ |
|
|
register Tcl_Obj *part1Ptr; /* Points to an object holding the name of |
|
|
* an array (if part2 is non-NULL) or the |
|
|
* name of a variable. */ |
|
|
register Tcl_Obj *part2Ptr; /* If non-null, points to an object holding |
|
|
* the name of an element in the array |
|
|
* part1Ptr. */ |
|
|
int flags; /* OR-ed combination of TCL_GLOBAL_ONLY, |
|
|
* TCL_LEAVE_ERR_MSG, and |
|
|
* TCL_PARSE_PART1 bits. */ |
|
|
{ |
|
|
char *part1, *part2; |
|
|
|
|
|
part1 = Tcl_GetString(part1Ptr); |
|
|
if (part2Ptr != NULL) { |
|
|
part2 = Tcl_GetString(part2Ptr); |
|
|
} else { |
|
|
part2 = NULL; |
|
|
} |
|
|
|
|
|
return Tcl_GetVar2Ex(interp, part1, part2, flags); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_GetVar2Ex -- |
|
|
* |
|
|
* Return the value of a Tcl variable as a Tcl object, given a |
|
|
* two-part name consisting of array name and element within array. |
|
|
* |
|
|
* Results: |
|
|
* The return value points to the current object value of the variable |
|
|
* given by part1Ptr and part2Ptr. If the specified variable doesn't |
|
|
* exist, or if there is a clash in array usage, then NULL is returned |
|
|
* and a message will be left in the interpreter's result if the |
|
|
* TCL_LEAVE_ERR_MSG flag is set. |
|
|
* |
|
|
* Side effects: |
|
|
* The ref count for the returned object is _not_ incremented to |
|
|
* reflect the returned reference; if you want to keep a reference to |
|
|
* the object you must increment its ref count yourself. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
Tcl_Obj * |
|
|
Tcl_GetVar2Ex(interp, part1, part2, flags) |
|
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
|
|
* to be looked up. */ |
|
|
char *part1; /* Name of an array (if part2 is non-NULL) |
|
|
* or the name of a variable. */ |
|
|
char *part2; /* If non-NULL, gives the name of an element |
|
|
* in the array part1. */ |
|
|
int flags; /* OR-ed combination of TCL_GLOBAL_ONLY, |
|
|
* and TCL_LEAVE_ERR_MSG bits. */ |
|
|
{ |
|
|
Interp *iPtr = (Interp *) interp; |
|
|
register Var *varPtr; |
|
|
Var *arrayPtr; |
|
|
char *msg; |
|
|
|
|
|
varPtr = TclLookupVar(interp, part1, part2, flags, "read", |
|
|
/*createPart1*/ 0, /*createPart2*/ 1, &arrayPtr); |
|
|
if (varPtr == NULL) { |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Invoke any traces that have been set for the variable. |
|
|
*/ |
|
|
|
|
|
if ((varPtr->tracePtr != NULL) |
|
|
|| ((arrayPtr != NULL) && (arrayPtr->tracePtr != NULL))) { |
|
|
msg = CallTraces(iPtr, arrayPtr, varPtr, part1, part2, |
|
|
(flags & (TCL_NAMESPACE_ONLY|TCL_GLOBAL_ONLY)) | TCL_TRACE_READS); |
|
|
if (msg != NULL) { |
|
|
if (flags & TCL_LEAVE_ERR_MSG) { |
|
|
VarErrMsg(interp, part1, part2, "read", msg); |
|
|
} |
|
|
goto errorReturn; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Return the element if it's an existing scalar variable. |
|
|
*/ |
|
|
|
|
|
if (TclIsVarScalar(varPtr) && !TclIsVarUndefined(varPtr)) { |
|
|
return varPtr->value.objPtr; |
|
|
} |
|
|
|
|
|
if (flags & TCL_LEAVE_ERR_MSG) { |
|
|
if (TclIsVarUndefined(varPtr) && (arrayPtr != NULL) |
|
|
&& !TclIsVarUndefined(arrayPtr)) { |
|
|
msg = noSuchElement; |
|
|
} else if (TclIsVarArray(varPtr)) { |
|
|
msg = isArray; |
|
|
} else { |
|
|
msg = noSuchVar; |
|
|
} |
|
|
VarErrMsg(interp, part1, part2, "read", msg); |
|
|
} |
|
|
|
|
|
/* |
|
|
* An error. If the variable doesn't exist anymore and no-one's using |
|
|
* it, then free up the relevant structures and hash table entries. |
|
|
*/ |
|
|
|
|
|
errorReturn: |
|
|
if (TclIsVarUndefined(varPtr)) { |
|
|
CleanupVar(varPtr, arrayPtr); |
|
|
} |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TclGetIndexedScalar -- |
|
|
* |
|
|
* Return the Tcl object value of a local scalar variable in the active |
|
|
* procedure, given its index in the procedure's array of compiler |
|
|
* allocated local variables. |
|
|
* |
|
|
* Results: |
|
|
* The return value points to the current object value of the variable |
|
|
* given by localIndex. If the specified variable doesn't exist, or |
|
|
* there is a clash in array usage, or an error occurs while executing |
|
|
* variable traces, then NULL is returned and a message will be left in |
|
|
* the interpreter's result if leaveErrorMsg is 1. |
|
|
* |
|
|
* Side effects: |
|
|
* The ref count for the returned object is _not_ incremented to |
|
|
* reflect the returned reference; if you want to keep a reference to |
|
|
* the object you must increment its ref count yourself. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
Tcl_Obj * |
|
|
TclGetIndexedScalar(interp, localIndex, leaveErrorMsg) |
|
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
|
|
* to be looked up. */ |
|
|
register int localIndex; /* Index of variable in procedure's array |
|
|
* of local variables. */ |
|
|
int leaveErrorMsg; /* 1 if to leave an error message in |
|
|
* interpreter's result on an error. |
|
|
* Otherwise no error message is left. */ |
|
|
{ |
|
|
Interp *iPtr = (Interp *) interp; |
|
|
CallFrame *varFramePtr = iPtr->varFramePtr; |
|
|
/* Points to the procedure call frame whose |
|
|
* variables are currently in use. Same as |
|
|
* the current procedure's frame, if any, |
|
|
* unless an "uplevel" is executing. */ |
|
|
Var *compiledLocals = varFramePtr->compiledLocals; |
|
|
register Var *varPtr; /* Points to the variable's in-frame Var |
|
|
* structure. */ |
|
|
char *varName; /* Name of the local variable. */ |
|
|
char *msg; |
|
|
|
|
|
#ifdef TCL_COMPILE_DEBUG |
|
|
int localCt = varFramePtr->procPtr->numCompiledLocals; |
|
|
|
|
|
if (compiledLocals == NULL) { |
|
|
fprintf(stderr, "\nTclGetIndexedScalar: can't get local %i in frame 0x%x, no compiled locals\n", |
|
|
localIndex, (unsigned int) varFramePtr); |
|
|
panic("TclGetIndexedScalar: no compiled locals in frame 0x%x", |
|
|
(unsigned int) varFramePtr); |
|
|
} |
|
|
if ((localIndex < 0) || (localIndex >= localCt)) { |
|
|
fprintf(stderr, "\nTclGetIndexedScalar: can't get local %i in frame 0x%x with %i locals\n", |
|
|
localIndex, (unsigned int) varFramePtr, localCt); |
|
|
panic("TclGetIndexedScalar: bad local index %i in frame 0x%x", |
|
|
localIndex, (unsigned int) varFramePtr); |
|
|
} |
|
|
#endif /* TCL_COMPILE_DEBUG */ |
|
|
|
|
|
varPtr = &(compiledLocals[localIndex]); |
|
|
varName = varPtr->name; |
|
|
|
|
|
/* |
|
|
* If varPtr is a link variable, we have a reference to some variable |
|
|
* that was created through an "upvar" or "global" command, or we have a |
|
|
* reference to a variable in an enclosing namespace. Traverse through |
|
|
* any links until we find the referenced variable. |
|
|
*/ |
|
|
|
|
|
while (TclIsVarLink(varPtr)) { |
|
|
varPtr = varPtr->value.linkPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Invoke any traces that have been set for the variable. |
|
|
*/ |
|
|
|
|
|
if (varPtr->tracePtr != NULL) { |
|
|
msg = CallTraces(iPtr, /*arrayPtr*/ NULL, varPtr, varName, NULL, |
|
|
TCL_TRACE_READS); |
|
|
if (msg != NULL) { |
|
|
if (leaveErrorMsg) { |
|
|
VarErrMsg(interp, varName, NULL, "read", msg); |
|
|
} |
|
|
return NULL; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Make sure we're dealing with a scalar variable and not an array, and |
|
|
* that the variable exists (isn't undefined). |
|
|
*/ |
|
|
|
|
|
if (!TclIsVarScalar(varPtr) || TclIsVarUndefined(varPtr)) { |
|
|
if (leaveErrorMsg) { |
|
|
if (TclIsVarArray(varPtr)) { |
|
|
msg = isArray; |
|
|
} else { |
|
|
msg = noSuchVar; |
|
|
} |
|
|
VarErrMsg(interp, varName, NULL, "read", msg); |
|
|
|
|
|
} |
|
|
return NULL; |
|
|
} |
|
|
return varPtr->value.objPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TclGetElementOfIndexedArray -- |
|
|
* |
|
|
* Return the Tcl object value for an element in a local array |
|
|
* variable. The element is named by the object elemPtr while the |
|
|
* array is specified by its index in the active procedure's array |
|
|
* of compiler allocated local variables. |
|
|
* |
|
|
* Results: |
|
|
* The return value points to the current object value of the |
|
|
* element. If the specified array or element doesn't exist, or there |
|
|
* is a clash in array usage, or an error occurs while executing |
|
|
* variable traces, then NULL is returned and a message will be left in |
|
|
* the interpreter's result if leaveErrorMsg is 1. |
|
|
* |
|
|
* Side effects: |
|
|
* The ref count for the returned object is _not_ incremented to |
|
|
* reflect the returned reference; if you want to keep a reference to |
|
|
* the object you must increment its ref count yourself. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
Tcl_Obj * |
|
|
TclGetElementOfIndexedArray(interp, localIndex, elemPtr, leaveErrorMsg) |
|
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
|
|
* to be looked up. */ |
|
|
int localIndex; /* Index of array variable in procedure's |
|
|
* array of local variables. */ |
|
|
Tcl_Obj *elemPtr; /* Points to an object holding the name of |
|
|
* an element to get in the array. */ |
|
|
int leaveErrorMsg; /* 1 if to leave an error message in |
|
|
* the interpreter's result on an error. |
|
|
* Otherwise no error message is left. */ |
|
|
{ |
|
|
Interp *iPtr = (Interp *) interp; |
|
|
CallFrame *varFramePtr = iPtr->varFramePtr; |
|
|
/* Points to the procedure call frame whose |
|
|
* variables are currently in use. Same as |
|
|
* the current procedure's frame, if any, |
|
|
* unless an "uplevel" is executing. */ |
|
|
Var *compiledLocals = varFramePtr->compiledLocals; |
|
|
Var *arrayPtr; /* Points to the array's in-frame Var |
|
|
* structure. */ |
|
|
char *arrayName; /* Name of the local array. */ |
|
|
Tcl_HashEntry *hPtr; |
|
|
Var *varPtr = NULL; /* Points to the element's Var structure |
|
|
* that we return. Initialized to avoid |
|
|
* compiler warning. */ |
|
|
char *elem, *msg; |
|
|
int new; |
|
|
|
|
|
#ifdef TCL_COMPILE_DEBUG |
|
|
Proc *procPtr = varFramePtr->procPtr; |
|
|
int localCt = procPtr->numCompiledLocals; |
|
|
|
|
|
if (compiledLocals == NULL) { |
|
|
fprintf(stderr, "\nTclGetElementOfIndexedArray: can't get element of local %i in frame 0x%x, no compiled locals\n", |
|
|
localIndex, (unsigned int) varFramePtr); |
|
|
panic("TclGetIndexedScalar: no compiled locals in frame 0x%x", |
|
|
(unsigned int) varFramePtr); |
|
|
} |
|
|
if ((localIndex < 0) || (localIndex >= localCt)) { |
|
|
fprintf(stderr, "\nTclGetIndexedScalar: can't get element of local %i in frame 0x%x with %i locals\n", |
|
|
localIndex, (unsigned int) varFramePtr, localCt); |
|
|
panic("TclGetElementOfIndexedArray: bad local index %i in frame 0x%x", |
|
|
localIndex, (unsigned int) varFramePtr); |
|
|
} |
|
|
#endif /* TCL_COMPILE_DEBUG */ |
|
|
|
|
|
elem = TclGetString(elemPtr); |
|
|
arrayPtr = &(compiledLocals[localIndex]); |
|
|
arrayName = arrayPtr->name; |
|
|
|
|
|
/* |
|
|
* If arrayPtr is a link variable, we have a reference to some variable |
|
|
* that was created through an "upvar" or "global" command, or we have a |
|
|
* reference to a variable in an enclosing namespace. Traverse through |
|
|
* any links until we find the referenced variable. |
|
|
*/ |
|
|
|
|
|
while (TclIsVarLink(arrayPtr)) { |
|
|
arrayPtr = arrayPtr->value.linkPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Make sure we're dealing with an array and that the array variable |
|
|
* exists (isn't undefined). |
|
|
*/ |
|
|
|
|
|
if (!TclIsVarArray(arrayPtr) || TclIsVarUndefined(arrayPtr)) { |
|
|
if (leaveErrorMsg) { |
|
|
VarErrMsg(interp, arrayName, elem, "read", noSuchVar); |
|
|
} |
|
|
goto errorReturn; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Look up the element. Note that we must create the element (but leave |
|
|
* it marked undefined) if it does not already exist. This allows a |
|
|
* trace to create new array elements "on the fly" that did not exist |
|
|
* before. A trace is always passed a variable for the array element. If |
|
|
* the trace does not define the variable, it will be deleted below (at |
|
|
* errorReturn) and an error returned. |
|
|
*/ |
|
|
|
|
|
hPtr = Tcl_CreateHashEntry(arrayPtr->value.tablePtr, elem, &new); |
|
|
if (new) { |
|
|
if (arrayPtr->searchPtr != NULL) { |
|
|
DeleteSearches(arrayPtr); |
|
|
} |
|
|
varPtr = NewVar(); |
|
|
Tcl_SetHashValue(hPtr, varPtr); |
|
|
varPtr->hPtr = hPtr; |
|
|
varPtr->nsPtr = varFramePtr->nsPtr; |
|
|
TclSetVarArrayElement(varPtr); |
|
|
} else { |
|
|
varPtr = (Var *) Tcl_GetHashValue(hPtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
* Invoke any traces that have been set for the element variable. |
|
|
*/ |
|
|
|
|
|
if ((varPtr->tracePtr != NULL) |
|
|
|| ((arrayPtr != NULL) && (arrayPtr->tracePtr != NULL))) { |
|
|
msg = CallTraces(iPtr, arrayPtr, varPtr, arrayName, elem, |
|
|
TCL_TRACE_READS); |
|
|
if (msg != NULL) { |
|
|
if (leaveErrorMsg) { |
|
|
VarErrMsg(interp, arrayName, elem, "read", msg); |
|
|
} |
|
|
goto errorReturn; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Return the element if it's an existing scalar variable. |
|
|
*/ |
|
|
|
|
|
if (TclIsVarScalar(varPtr) && !TclIsVarUndefined(varPtr)) { |
|
|
return varPtr->value.objPtr; |
|
|
} |
|
|
|
|
|
if (leaveErrorMsg) { |
|
|
if (TclIsVarArray(varPtr)) { |
|
|
msg = isArray; |
|
|
} else { |
|
|
msg = noSuchVar; |
|
|
} |
|
|
VarErrMsg(interp, arrayName, elem, "read", msg); |
|
|
} |
|
|
|
|
|
/* |
|
|
* An error. If the variable doesn't exist anymore and no-one's using |
|
|
* it, then free up the relevant structures and hash table entries. |
|
|
*/ |
|
|
|
|
|
errorReturn: |
|
|
if ((varPtr != NULL) && TclIsVarUndefined(varPtr)) { |
|
|
CleanupVar(varPtr, NULL); /* the array is not in a hashtable */ |
|
|
} |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_SetObjCmd -- |
|
|
* |
|
|
* This procedure is invoked to process the "set" Tcl command. |
|
|
* See the user documentation for details on what it does. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl result value. |
|
|
* |
|
|
* Side effects: |
|
|
* A variable's value may be changed. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
/* ARGSUSED */ |
|
|
int |
|
|
Tcl_SetObjCmd(dummy, interp, objc, objv) |
|
|
ClientData dummy; /* Not used. */ |
|
|
register Tcl_Interp *interp; /* Current interpreter. */ |
|
|
int objc; /* Number of arguments. */ |
|
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
|
|
{ |
|
|
Tcl_Obj *varValueObj; |
|
|
|
|
|
if (objc == 2) { |
|
|
varValueObj = Tcl_ObjGetVar2(interp, objv[1], NULL, TCL_LEAVE_ERR_MSG); |
|
|
if (varValueObj == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
Tcl_SetObjResult(interp, varValueObj); |
|
|
return TCL_OK; |
|
|
} else if (objc == 3) { |
|
|
|
|
|
varValueObj = Tcl_ObjSetVar2(interp, objv[1], NULL, objv[2], |
|
|
TCL_LEAVE_ERR_MSG); |
|
|
if (varValueObj == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
Tcl_SetObjResult(interp, varValueObj); |
|
|
return TCL_OK; |
|
|
} else { |
|
|
Tcl_WrongNumArgs(interp, 1, objv, "varName ?newValue?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_SetVar -- |
|
|
* |
|
|
* Change the value of a variable. |
|
|
* |
|
|
* Results: |
|
|
* Returns a pointer to the malloc'ed string which is the character |
|
|
* representation of the variable's new value. The caller must not |
|
|
* modify this string. If the write operation was disallowed then NULL |
|
|
* is returned; if the TCL_LEAVE_ERR_MSG flag is set, then an |
|
|
* explanatory message will be left in the interp's result. Note that the |
|
|
* returned string may not be the same as newValue; this is because |
|
|
* variable traces may modify the variable's value. |
|
|
* |
|
|
* Side effects: |
|
|
* If varName is defined as a local or global variable in interp, |
|
|
* its value is changed to newValue. If varName isn't currently |
|
|
* defined, then a new global variable by that name is created. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
char * |
|
|
Tcl_SetVar(interp, varName, newValue, flags) |
|
|
Tcl_Interp *interp; /* Command interpreter in which varName is |
|
|
* to be looked up. */ |
|
|
char *varName; /* Name of a variable in interp. */ |
|
|
char *newValue; /* New value for varName. */ |
|
|
int flags; /* Various flags that tell how to set value: |
|
|
* any of TCL_GLOBAL_ONLY, |
|
|
* TCL_NAMESPACE_ONLY, TCL_APPEND_VALUE, |
|
|
* TCL_LIST_ELEMENT, TCL_LEAVE_ERR_MSG. */ |
|
|
{ |
|
|
return Tcl_SetVar2(interp, varName, (char *) NULL, newValue, flags); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_SetVar2 -- |
|
|
* |
|
|
* Given a two-part variable name, which may refer either to a |
|
|
* scalar variable or an element of an array, change the value |
|
|
* of the variable. If the named scalar or array or element |
|
|
* doesn't exist then create one. |
|
|
* |
|
|
* Results: |
|
|
* Returns a pointer to the malloc'ed string which is the character |
|
|
* representation of the variable's new value. The caller must not |
|
|
* modify this string. If the write operation was disallowed because an |
|
|
* array was expected but not found (or vice versa), then NULL is |
|
|
* returned; if the TCL_LEAVE_ERR_MSG flag is set, then an explanatory |
|
|
* message will be left in the interp's result. Note that the returned |
|
|
* string may not be the same as newValue; this is because variable |
|
|
* traces may modify the variable's value. |
|
|
* |
|
|
* Side effects: |
|
|
* The value of the given variable is set. If either the array |
|
|
* or the entry didn't exist then a new one is created. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
char * |
|
|
Tcl_SetVar2(interp, part1, part2, newValue, flags) |
|
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
|
|
* to be looked up. */ |
|
|
char *part1; /* If part2 is NULL, this is name of scalar |
|
|
* variable. Otherwise it is the name of |
|
|
* an array. */ |
|
|
char *part2; /* Name of an element within an array, or |
|
|
* NULL. */ |
|
|
char *newValue; /* New value for variable. */ |
|
|
int flags; /* Various flags that tell how to set value: |
|
|
* any of TCL_GLOBAL_ONLY, |
|
|
* TCL_NAMESPACE_ONLY, TCL_APPEND_VALUE, |
|
|
* TCL_LIST_ELEMENT, or TCL_LEAVE_ERR_MSG */ |
|
|
{ |
|
|
register Tcl_Obj *valuePtr; |
|
|
Tcl_Obj *varValuePtr; |
|
|
|
|
|
/* |
|
|
* Create an object holding the variable's new value and use |
|
|
* Tcl_SetVar2Ex to actually set the variable. |
|
|
*/ |
|
|
|
|
|
valuePtr = Tcl_NewStringObj(newValue, -1); |
|
|
Tcl_IncrRefCount(valuePtr); |
|
|
|
|
|
varValuePtr = Tcl_SetVar2Ex(interp, part1, part2, valuePtr, flags); |
|
|
Tcl_DecrRefCount(valuePtr); /* done with the object */ |
|
|
|
|
|
if (varValuePtr == NULL) { |
|
|
return NULL; |
|
|
} |
|
|
return TclGetString(varValuePtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_ObjSetVar2 -- |
|
|
* |
|
|
* This function is the same as Tcl_SetVar2Ex below, except the |
|
|
* variable names are passed in Tcl object instead of strings. |
|
|
* |
|
|
* Results: |
|
|
* Returns a pointer to the Tcl_Obj holding the new value of the |
|
|
* variable. If the write operation was disallowed because an array was |
|
|
* expected but not found (or vice versa), then NULL is returned; if |
|
|
* the TCL_LEAVE_ERR_MSG flag is set, then an explanatory message will |
|
|
* be left in the interpreter's result. Note that the returned object |
|
|
* may not be the same one referenced by newValuePtr; this is because |
|
|
* variable traces may modify the variable's value. |
|
|
* |
|
|
* Side effects: |
|
|
* The value of the given variable is set. If either the array or the |
|
|
* entry didn't exist then a new variable is created. |
|
|
|
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
Tcl_Obj * |
|
|
Tcl_ObjSetVar2(interp, part1Ptr, part2Ptr, newValuePtr, flags) |
|
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
|
|
* to be found. */ |
|
|
register Tcl_Obj *part1Ptr; /* Points to an object holding the name of |
|
|
* an array (if part2 is non-NULL) or the |
|
|
* name of a variable. */ |
|
|
register Tcl_Obj *part2Ptr; /* If non-null, points to an object holding |
|
|
* the name of an element in the array |
|
|
* part1Ptr. */ |
|
|
Tcl_Obj *newValuePtr; /* New value for variable. */ |
|
|
int flags; /* Various flags that tell how to set value: |
|
|
* any of TCL_GLOBAL_ONLY, |
|
|
* TCL_NAMESPACE_ONLY, TCL_APPEND_VALUE, |
|
|
* TCL_LIST_ELEMENT, TCL_LEAVE_ERR_MSG, or |
|
|
* TCL_PARSE_PART1. */ |
|
|
{ |
|
|
char *part1, *part2; |
|
|
|
|
|
part1 = Tcl_GetString(part1Ptr); |
|
|
if (part2Ptr != NULL) { |
|
|
part2 = Tcl_GetString(part2Ptr); |
|
|
} else { |
|
|
part2 = NULL; |
|
|
} |
|
|
|
|
|
return Tcl_SetVar2Ex(interp, part1, part2, newValuePtr, flags); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_SetVar2Ex -- |
|
|
* |
|
|
* Given a two-part variable name, which may refer either to a scalar |
|
|
* variable or an element of an array, change the value of the variable |
|
|
* to a new Tcl object value. If the named scalar or array or element |
|
|
* doesn't exist then create one. |
|
|
* |
|
|
* Results: |
|
|
* Returns a pointer to the Tcl_Obj holding the new value of the |
|
|
* variable. If the write operation was disallowed because an array was |
|
|
* expected but not found (or vice versa), then NULL is returned; if |
|
|
* the TCL_LEAVE_ERR_MSG flag is set, then an explanatory message will |
|
|
* be left in the interpreter's result. Note that the returned object |
|
|
* may not be the same one referenced by newValuePtr; this is because |
|
|
* variable traces may modify the variable's value. |
|
|
* |
|
|
* Side effects: |
|
|
* The value of the given variable is set. If either the array or the |
|
|
* entry didn't exist then a new variable is created. |
|
|
* |
|
|
* The reference count is decremented for any old value of the variable |
|
|
* and incremented for its new value. If the new value for the variable |
|
|
* is not the same one referenced by newValuePtr (perhaps as a result |
|
|
* of a variable trace), then newValuePtr's ref count is left unchanged |
|
|
* by Tcl_SetVar2Ex. newValuePtr's ref count is also left unchanged if |
|
|
* we are appending it as a string value: that is, if "flags" includes |
|
|
* TCL_APPEND_VALUE but not TCL_LIST_ELEMENT. |
|
|
* |
|
|
* The reference count for the returned object is _not_ incremented: if |
|
|
* you want to keep a reference to the object you must increment its |
|
|
* ref count yourself. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
Tcl_Obj * |
|
|
Tcl_SetVar2Ex(interp, part1, part2, newValuePtr, flags) |
|
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
|
|
* to be found. */ |
|
|
char *part1; /* Name of an array (if part2 is non-NULL) |
|
|
* or the name of a variable. */ |
|
|
char *part2; /* If non-NULL, gives the name of an element |
|
|
* in the array part1. */ |
|
|
Tcl_Obj *newValuePtr; /* New value for variable. */ |
|
|
int flags; /* Various flags that tell how to set value: |
|
|
* any of TCL_GLOBAL_ONLY, |
|
|
* TCL_NAMESPACE_ONLY, TCL_APPEND_VALUE, |
|
|
* TCL_LIST_ELEMENT or TCL_LEAVE_ERR_MSG. */ |
|
|
{ |
|
|
Interp *iPtr = (Interp *) interp; |
|
|
register Var *varPtr; |
|
|
Var *arrayPtr; |
|
|
Tcl_Obj *oldValuePtr; |
|
|
Tcl_Obj *resultPtr = NULL; |
|
|
char *bytes; |
|
|
int length, result; |
|
|
|
|
|
varPtr = TclLookupVar(interp, part1, part2, flags, "set", |
|
|
/*createPart1*/ 1, /*createPart2*/ 1, &arrayPtr); |
|
|
if (varPtr == NULL) { |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
* If the variable is in a hashtable and its hPtr field is NULL, then we |
|
|
* may have an upvar to an array element where the array was deleted |
|
|
* or an upvar to a namespace variable whose namespace was deleted. |
|
|
* Generate an error (allowing the variable to be reset would screw up |
|
|
* our storage allocation and is meaningless anyway). |
|
|
*/ |
|
|
|
|
|
if ((varPtr->flags & VAR_IN_HASHTABLE) && (varPtr->hPtr == NULL)) { |
|
|
if (flags & TCL_LEAVE_ERR_MSG) { |
|
|
if (TclIsVarArrayElement(varPtr)) { |
|
|
VarErrMsg(interp, part1, part2, "set", danglingElement); |
|
|
} else { |
|
|
VarErrMsg(interp, part1, part2, "set", danglingVar); |
|
|
} |
|
|
} |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
* It's an error to try to set an array variable itself. |
|
|
*/ |
|
|
|
|
|
if (TclIsVarArray(varPtr) && !TclIsVarUndefined(varPtr)) { |
|
|
if (flags & TCL_LEAVE_ERR_MSG) { |
|
|
VarErrMsg(interp, part1, part2, "set", isArray); |
|
|
} |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
* At this point, if we were appending, we used to call read traces: we |
|
|
* treated append as a read-modify-write. However, it seemed unlikely to |
|
|
* us that a real program would be interested in such reads being done |
|
|
* during a set operation. |
|
|
*/ |
|
|
|
|
|
/* |
|
|
* Set the variable's new value. If appending, append the new value to |
|
|
* the variable, either as a list element or as a string. Also, if |
|
|
* appending, then if the variable's old value is unshared we can modify |
|
|
* it directly, otherwise we must create a new copy to modify: this is |
|
|
* "copy on write". |
|
|
*/ |
|
|
|
|
|
oldValuePtr = varPtr->value.objPtr; |
|
|
if (flags & TCL_APPEND_VALUE) { |
|
|
if (TclIsVarUndefined(varPtr) && (oldValuePtr != NULL)) { |
|
|
Tcl_DecrRefCount(oldValuePtr); /* discard old value */ |
|
|
varPtr->value.objPtr = NULL; |
|
|
oldValuePtr = NULL; |
|
|
} |
|
|
if (flags & TCL_LIST_ELEMENT) { /* append list element */ |
|
|
if (oldValuePtr == NULL) { |
|
|
TclNewObj(oldValuePtr); |
|
|
varPtr->value.objPtr = oldValuePtr; |
|
|
Tcl_IncrRefCount(oldValuePtr); /* since var is referenced */ |
|
|
} else if (Tcl_IsShared(oldValuePtr)) { |
|
|
varPtr->value.objPtr = Tcl_DuplicateObj(oldValuePtr); |
|
|
Tcl_DecrRefCount(oldValuePtr); |
|
|
oldValuePtr = varPtr->value.objPtr; |
|
|
Tcl_IncrRefCount(oldValuePtr); /* since var is referenced */ |
|
|
} |
|
|
result = Tcl_ListObjAppendElement(interp, oldValuePtr, |
|
|
newValuePtr); |
|
|
if (result != TCL_OK) { |
|
|
return NULL; |
|
|
} |
|
|
} else { /* append string */ |
|
|
/* |
|
|
* We append newValuePtr's bytes but don't change its ref count. |
|
|
*/ |
|
|
|
|
|
bytes = Tcl_GetStringFromObj(newValuePtr, &length); |
|
|
if (oldValuePtr == NULL) { |
|
|
varPtr->value.objPtr = Tcl_NewStringObj(bytes, length); |
|
|
Tcl_IncrRefCount(varPtr->value.objPtr); |
|
|
} else { |
|
|
if (Tcl_IsShared(oldValuePtr)) { /* append to copy */ |
|
|
varPtr->value.objPtr = Tcl_DuplicateObj(oldValuePtr); |
|
|
TclDecrRefCount(oldValuePtr); |
|
|
oldValuePtr = varPtr->value.objPtr; |
|
|
Tcl_IncrRefCount(oldValuePtr); /* since var is ref */ |
|
|
} |
|
|
Tcl_AppendObjToObj(oldValuePtr, newValuePtr); |
|
|
} |
|
|
} |
|
|
} else { |
|
|
if (flags & TCL_LIST_ELEMENT) { /* set var to list element */ |
|
|
int neededBytes, listFlags; |
|
|
|
|
|
/* |
|
|
* We set the variable to the result of converting newValuePtr's |
|
|
* string rep to a list element. We do not change newValuePtr's |
|
|
* ref count. |
|
|
*/ |
|
|
|
|
|
if (oldValuePtr != NULL) { |
|
|
Tcl_DecrRefCount(oldValuePtr); /* discard old value */ |
|
|
} |
|
|
bytes = Tcl_GetStringFromObj(newValuePtr, &length); |
|
|
neededBytes = Tcl_ScanElement(bytes, &listFlags); |
|
|
oldValuePtr = Tcl_NewObj(); |
|
|
oldValuePtr->bytes = (char *) |
|
|
ckalloc((unsigned) (neededBytes + 1)); |
|
|
oldValuePtr->length = Tcl_ConvertElement(bytes, |
|
|
oldValuePtr->bytes, listFlags); |
|
|
varPtr->value.objPtr = oldValuePtr; |
|
|
Tcl_IncrRefCount(varPtr->value.objPtr); |
|
|
} else if (newValuePtr != oldValuePtr) { |
|
|
varPtr->value.objPtr = newValuePtr; |
|
|
Tcl_IncrRefCount(newValuePtr); /* var is another ref */ |
|
|
if (oldValuePtr != NULL) { |
|
|
TclDecrRefCount(oldValuePtr); /* discard old value */ |
|
|
} |
|
|
} |
|
|
} |
|
|
TclSetVarScalar(varPtr); |
|
|
TclClearVarUndefined(varPtr); |
|
|
if (arrayPtr != NULL) { |
|
|
TclClearVarUndefined(arrayPtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
* Invoke any write traces for the variable. |
|
|
*/ |
|
|
|
|
|
if ((varPtr->tracePtr != NULL) |
|
|
|| ((arrayPtr != NULL) && (arrayPtr->tracePtr != NULL))) { |
|
|
char *msg = CallTraces(iPtr, arrayPtr, varPtr, part1, part2, |
|
|
(flags & (TCL_GLOBAL_ONLY|TCL_NAMESPACE_ONLY)) | TCL_TRACE_WRITES); |
|
|
if (msg != NULL) { |
|
|
if (flags & TCL_LEAVE_ERR_MSG) { |
|
|
VarErrMsg(interp, part1, part2, "set", msg); |
|
|
} |
|
|
goto cleanup; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Return the variable's value unless the variable was changed in some |
|
|
* gross way by a trace (e.g. it was unset and then recreated as an |
|
|
* array). |
|
|
*/ |
|
|
|
|
|
if (TclIsVarScalar(varPtr) && !TclIsVarUndefined(varPtr)) { |
|
|
return varPtr->value.objPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
* A trace changed the value in some gross way. Return an empty string |
|
|
* object. |
|
|
*/ |
|
|
|
|
|
resultPtr = iPtr->emptyObjPtr; |
|
|
|
|
|
/* |
|
|
* If the variable doesn't exist anymore and no-one's using it, then |
|
|
* free up the relevant structures and hash table entries. |
|
|
*/ |
|
|
|
|
|
cleanup: |
|
|
if (TclIsVarUndefined(varPtr)) { |
|
|
CleanupVar(varPtr, arrayPtr); |
|
|
} |
|
|
return resultPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TclSetIndexedScalar -- |
|
|
* |
|
|
* Change the Tcl object value of a local scalar variable in the active |
|
|
* procedure, given its compile-time allocated index in the procedure's |
|
|
* array of local variables. |
|
|
* |
|
|
* Results: |
|
|
* Returns a pointer to the Tcl_Obj holding the new value of the |
|
|
* variable given by localIndex. If the specified variable doesn't |
|
|
* exist, or there is a clash in array usage, or an error occurs while |
|
|
* executing variable traces, then NULL is returned and a message will |
|
|
* be left in the interpreter's result if leaveErrorMsg is 1. Note |
|
|
* that the returned object may not be the same one referenced by |
|
|
* newValuePtr; this is because variable traces may modify the |
|
|
* variable's value. |
|
|
* |
|
|
* Side effects: |
|
|
* The value of the given variable is set. The reference count is |
|
|
* decremented for any old value of the variable and incremented for |
|
|
* its new value. If as a result of a variable trace the new value for |
|
|
* the variable is not the same one referenced by newValuePtr, then |
|
|
* newValuePtr's ref count is left unchanged. The ref count for the |
|
|
* returned object is _not_ incremented to reflect the returned |
|
|
* reference; if you want to keep a reference to the object you must |
|
|
* increment its ref count yourself. This procedure does not create |
|
|
* new variables, but only sets those recognized at compile time. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
Tcl_Obj * |
|
|
TclSetIndexedScalar(interp, localIndex, newValuePtr, leaveErrorMsg) |
|
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
|
|
* to be found. */ |
|
|
int localIndex; /* Index of variable in procedure's array |
|
|
* of local variables. */ |
|
|
Tcl_Obj *newValuePtr; /* New value for variable. */ |
|
|
int leaveErrorMsg; /* 1 if to leave an error message in |
|
|
* the interpreter's result on an error. |
|
|
* Otherwise no error message is left. */ |
|
|
{ |
|
|
Interp *iPtr = (Interp *) interp; |
|
|
CallFrame *varFramePtr = iPtr->varFramePtr; |
|
|
/* Points to the procedure call frame whose |
|
|
* variables are currently in use. Same as |
|
|
* the current procedure's frame, if any, |
|
|
* unless an "uplevel" is executing. */ |
|
|
Var *compiledLocals = varFramePtr->compiledLocals; |
|
|
register Var *varPtr; /* Points to the variable's in-frame Var |
|
|
* structure. */ |
|
|
char *varName; /* Name of the local variable. */ |
|
|
Tcl_Obj *oldValuePtr; |
|
|
Tcl_Obj *resultPtr = NULL; |
|
|
|
|
|
#ifdef TCL_COMPILE_DEBUG |
|
|
Proc *procPtr = varFramePtr->procPtr; |
|
|
int localCt = procPtr->numCompiledLocals; |
|
|
|
|
|
if (compiledLocals == NULL) { |
|
|
fprintf(stderr, "\nTclSetIndexedScalar: can't set local %i in frame 0x%x, no compiled locals\n", |
|
|
localIndex, (unsigned int) varFramePtr); |
|
|
panic("TclSetIndexedScalar: no compiled locals in frame 0x%x", |
|
|
(unsigned int) varFramePtr); |
|
|
} |
|
|
if ((localIndex < 0) || (localIndex >= localCt)) { |
|
|
fprintf(stderr, "\nTclSetIndexedScalar: can't set local %i in frame 0x%x with %i locals\n", |
|
|
localIndex, (unsigned int) varFramePtr, localCt); |
|
|
panic("TclSetIndexedScalar: bad local index %i in frame 0x%x", |
|
|
localIndex, (unsigned int) varFramePtr); |
|
|
} |
|
|
#endif /* TCL_COMPILE_DEBUG */ |
|
|
|
|
|
varPtr = &(compiledLocals[localIndex]); |
|
|
varName = varPtr->name; |
|
|
|
|
|
/* |
|
|
* If varPtr is a link variable, we have a reference to some variable |
|
|
* that was created through an "upvar" or "global" command, or we have a |
|
|
* reference to a variable in an enclosing namespace. Traverse through |
|
|
* any links until we find the referenced variable. |
|
|
*/ |
|
|
|
|
|
while (TclIsVarLink(varPtr)) { |
|
|
varPtr = varPtr->value.linkPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
* If the variable is in a hashtable and its hPtr field is NULL, then we |
|
|
* may have an upvar to an array element where the array was deleted |
|
|
* or an upvar to a namespace variable whose namespace was deleted. |
|
|
* Generate an error (allowing the variable to be reset would screw up |
|
|
* our storage allocation and is meaningless anyway). |
|
|
*/ |
|
|
|
|
|
if ((varPtr->flags & VAR_IN_HASHTABLE) && (varPtr->hPtr == NULL)) { |
|
|
if (leaveErrorMsg) { |
|
|
if (TclIsVarArrayElement(varPtr)) { |
|
|
VarErrMsg(interp, varName, NULL, "set", danglingElement); |
|
|
} else { |
|
|
VarErrMsg(interp, varName, NULL, "set", danglingVar); |
|
|
} |
|
|
} |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
* It's an error to try to set an array variable itself. |
|
|
*/ |
|
|
|
|
|
if (TclIsVarArray(varPtr) && !TclIsVarUndefined(varPtr)) { |
|
|
if (leaveErrorMsg) { |
|
|
VarErrMsg(interp, varName, NULL, "set", isArray); |
|
|
} |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Set the variable's new value and discard its old value. We don't |
|
|
* append with this "set" procedure so the old value isn't needed. |
|
|
*/ |
|
|
|
|
|
oldValuePtr = varPtr->value.objPtr; |
|
|
if (newValuePtr != oldValuePtr) { /* set new value */ |
|
|
varPtr->value.objPtr = newValuePtr; |
|
|
Tcl_IncrRefCount(newValuePtr); /* var is another ref to obj */ |
|
|
if (oldValuePtr != NULL) { |
|
|
TclDecrRefCount(oldValuePtr); /* discard old value */ |
|
|
} |
|
|
} |
|
|
TclSetVarScalar(varPtr); |
|
|
TclClearVarUndefined(varPtr); |
|
|
|
|
|
/* |
|
|
* Invoke any write traces for the variable. |
|
|
*/ |
|
|
|
|
|
if (varPtr->tracePtr != NULL) { |
|
|
char *msg = CallTraces(iPtr, /*arrayPtr*/ NULL, varPtr, |
|
|
varName, (char *) NULL, TCL_TRACE_WRITES); |
|
|
if (msg != NULL) { |
|
|
if (leaveErrorMsg) { |
|
|
VarErrMsg(interp, varName, NULL, "set", msg); |
|
|
} |
|
|
goto cleanup; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Return the variable's value unless the variable was changed in some |
|
|
* gross way by a trace (e.g. it was unset and then recreated as an |
|
|
* array). If it was changed is a gross way, just return an empty string |
|
|
* object. |
|
|
*/ |
|
|
|
|
|
if (TclIsVarScalar(varPtr) && !TclIsVarUndefined(varPtr)) { |
|
|
return varPtr->value.objPtr; |
|
|
} |
|
|
|
|
|
resultPtr = Tcl_NewObj(); |
|
|
|
|
|
/* |
|
|
* If the variable doesn't exist anymore and no-one's using it, then |
|
|
* free up the relevant structures and hash table entries. |
|
|
*/ |
|
|
|
|
|
cleanup: |
|
|
if (TclIsVarUndefined(varPtr)) { |
|
|
CleanupVar(varPtr, NULL); |
|
|
} |
|
|
return resultPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TclSetElementOfIndexedArray -- |
|
|
* |
|
|
* Change the Tcl object value of an element in a local array |
|
|
* variable. The element is named by the object elemPtr while the array |
|
|
* is specified by its index in the active procedure's array of |
|
|
* compiler allocated local variables. |
|
|
* |
|
|
* Results: |
|
|
* Returns a pointer to the Tcl_Obj holding the new value of the |
|
|
* element. If the specified array or element doesn't exist, or there |
|
|
* is a clash in array usage, or an error occurs while executing |
|
|
* variable traces, then NULL is returned and a message will be left in |
|
|
* the interpreter's result if leaveErrorMsg is 1. Note that the |
|
|
* returned object may not be the same one referenced by newValuePtr; |
|
|
* this is because variable traces may modify the variable's value. |
|
|
* |
|
|
* Side effects: |
|
|
* The value of the given array element is set. The reference count is |
|
|
* decremented for any old value of the element and incremented for its |
|
|
* new value. If as a result of a variable trace the new value for the |
|
|
* element is not the same one referenced by newValuePtr, then |
|
|
* newValuePtr's ref count is left unchanged. The ref count for the |
|
|
* returned object is _not_ incremented to reflect the returned |
|
|
* reference; if you want to keep a reference to the object you must |
|
|
* increment its ref count yourself. This procedure will not create new |
|
|
* array variables, but only sets elements of those arrays recognized |
|
|
* at compile time. However, if the entry doesn't exist then a new |
|
|
* variable is created. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
Tcl_Obj * |
|
|
TclSetElementOfIndexedArray(interp, localIndex, elemPtr, newValuePtr, |
|
|
leaveErrorMsg) |
|
|
Tcl_Interp *interp; /* Command interpreter in which the array is |
|
|
* to be found. */ |
|
|
int localIndex; /* Index of array variable in procedure's |
|
|
* array of local variables. */ |
|
|
Tcl_Obj *elemPtr; /* Points to an object holding the name of |
|
|
* an element to set in the array. */ |
|
|
Tcl_Obj *newValuePtr; /* New value for variable. */ |
|
|
int leaveErrorMsg; /* 1 if to leave an error message in |
|
|
* the interpreter's result on an error. |
|
|
* Otherwise no error message is left. */ |
|
|
{ |
|
|
Interp *iPtr = (Interp *) interp; |
|
|
CallFrame *varFramePtr = iPtr->varFramePtr; |
|
|
/* Points to the procedure call frame whose |
|
|
* variables are currently in use. Same as |
|
|
* the current procedure's frame, if any, |
|
|
* unless an "uplevel" is executing. */ |
|
|
Var *compiledLocals = varFramePtr->compiledLocals; |
|
|
Var *arrayPtr; /* Points to the array's in-frame Var |
|
|
* structure. */ |
|
|
char *arrayName; /* Name of the local array. */ |
|
|
char *elem; |
|
|
Tcl_HashEntry *hPtr; |
|
|
Var *varPtr = NULL; /* Points to the element's Var structure |
|
|
* that we return. */ |
|
|
Tcl_Obj *resultPtr = NULL; |
|
|
Tcl_Obj *oldValuePtr; |
|
|
int new; |
|
|
|
|
|
#ifdef TCL_COMPILE_DEBUG |
|
|
Proc *procPtr = varFramePtr->procPtr; |
|
|
int localCt = procPtr->numCompiledLocals; |
|
|
|
|
|
if (compiledLocals == NULL) { |
|
|
fprintf(stderr, "\nTclSetElementOfIndexedArray: can't set element of local %i in frame 0x%x, no compiled locals\n", |
|
|
localIndex, (unsigned int) varFramePtr); |
|
|
panic("TclSetIndexedScalar: no compiled locals in frame 0x%x", |
|
|
(unsigned int) varFramePtr); |
|
|
} |
|
|
if ((localIndex < 0) || (localIndex >= localCt)) { |
|
|
fprintf(stderr, "\nTclSetIndexedScalar: can't set elememt of local %i in frame 0x%x with %i locals\n", |
|
|
localIndex, (unsigned int) varFramePtr, localCt); |
|
|
panic("TclSetElementOfIndexedArray: bad local index %i in frame 0x%x", |
|
|
localIndex, (unsigned int) varFramePtr); |
|
|
} |
|
|
#endif /* TCL_COMPILE_DEBUG */ |
|
|
|
|
|
elem = TclGetString(elemPtr); |
|
|
arrayPtr = &(compiledLocals[localIndex]); |
|
|
arrayName = arrayPtr->name; |
|
|
|
|
|
/* |
|
|
* If arrayPtr is a link variable, we have a reference to some variable |
|
|
* that was created through an "upvar" or "global" command, or we have a |
|
|
* reference to a variable in an enclosing namespace. Traverse through |
|
|
* any links until we find the referenced variable. |
|
|
*/ |
|
|
|
|
|
while (TclIsVarLink(arrayPtr)) { |
|
|
arrayPtr = arrayPtr->value.linkPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
* If the variable is in a hashtable and its hPtr field is NULL, then we |
|
|
* may have an upvar to an array element where the array was deleted |
|
|
* or an upvar to a namespace variable whose namespace was deleted. |
|
|
* Generate an error (allowing the variable to be reset would screw up |
|
|
* our storage allocation and is meaningless anyway). |
|
|
*/ |
|
|
|
|
|
if ((arrayPtr->flags & VAR_IN_HASHTABLE) && (arrayPtr->hPtr == NULL)) { |
|
|
if (leaveErrorMsg) { |
|
|
if (TclIsVarArrayElement(arrayPtr)) { |
|
|
VarErrMsg(interp, arrayName, elem, "set", danglingElement); |
|
|
} else { |
|
|
VarErrMsg(interp, arrayName, elem, "set", danglingVar); |
|
|
} |
|
|
} |
|
|
goto errorReturn; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Make sure we're dealing with an array. |
|
|
*/ |
|
|
|
|
|
if (TclIsVarUndefined(arrayPtr) && !TclIsVarArrayElement(arrayPtr)) { |
|
|
TclSetVarArray(arrayPtr); |
|
|
arrayPtr->value.tablePtr = |
|
|
(Tcl_HashTable *) ckalloc(sizeof(Tcl_HashTable)); |
|
|
Tcl_InitHashTable(arrayPtr->value.tablePtr, TCL_STRING_KEYS); |
|
|
TclClearVarUndefined(arrayPtr); |
|
|
} else if (!TclIsVarArray(arrayPtr)) { |
|
|
if (leaveErrorMsg) { |
|
|
VarErrMsg(interp, arrayName, elem, "set", needArray); |
|
|
} |
|
|
goto errorReturn; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Look up the element. |
|
|
*/ |
|
|
|
|
|
hPtr = Tcl_CreateHashEntry(arrayPtr->value.tablePtr, elem, &new); |
|
|
if (new) { |
|
|
if (arrayPtr->searchPtr != NULL) { |
|
|
DeleteSearches(arrayPtr); |
|
|
} |
|
|
varPtr = NewVar(); |
|
|
Tcl_SetHashValue(hPtr, varPtr); |
|
|
varPtr->hPtr = hPtr; |
|
|
varPtr->nsPtr = varFramePtr->nsPtr; |
|
|
TclSetVarArrayElement(varPtr); |
|
|
} |
|
|
varPtr = (Var *) Tcl_GetHashValue(hPtr); |
|
|
|
|
|
/* |
|
|
* It's an error to try to set an array variable itself. |
|
|
*/ |
|
|
|
|
|
if (TclIsVarArray(varPtr)) { |
|
|
if (leaveErrorMsg) { |
|
|
VarErrMsg(interp, arrayName, elem, "set", isArray); |
|
|
} |
|
|
goto errorReturn; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Set the variable's new value and discard the old one. We don't |
|
|
* append with this "set" procedure so the old value isn't needed. |
|
|
*/ |
|
|
|
|
|
oldValuePtr = varPtr->value.objPtr; |
|
|
if (newValuePtr != oldValuePtr) { /* set new value */ |
|
|
varPtr->value.objPtr = newValuePtr; |
|
|
Tcl_IncrRefCount(newValuePtr); /* var is another ref to obj */ |
|
|
if (oldValuePtr != NULL) { |
|
|
TclDecrRefCount(oldValuePtr); /* discard old value */ |
|
|
} |
|
|
} |
|
|
TclSetVarScalar(varPtr); |
|
|
TclClearVarUndefined(varPtr); |
|
|
|
|
|
/* |
|
|
* Invoke any write traces for the element variable. |
|
|
*/ |
|
|
|
|
|
if ((varPtr->tracePtr != NULL) |
|
|
|| ((arrayPtr != NULL) && (arrayPtr->tracePtr != NULL))) { |
|
|
char *msg = CallTraces(iPtr, arrayPtr, varPtr, arrayName, elem, |
|
|
TCL_TRACE_WRITES); |
|
|
if (msg != NULL) { |
|
|
if (leaveErrorMsg) { |
|
|
VarErrMsg(interp, arrayName, elem, "set", msg); |
|
|
} |
|
|
goto errorReturn; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Return the element's value unless it was changed in some gross way by |
|
|
* a trace (e.g. it was unset and then recreated as an array). If it was |
|
|
* changed is a gross way, just return an empty string object. |
|
|
*/ |
|
|
|
|
|
if (TclIsVarScalar(varPtr) && !TclIsVarUndefined(varPtr)) { |
|
|
return varPtr->value.objPtr; |
|
|
} |
|
|
|
|
|
resultPtr = Tcl_NewObj(); |
|
|
|
|
|
/* |
|
|
* An error. If the variable doesn't exist anymore and no-one's using |
|
|
* it, then free up the relevant structures and hash table entries. |
|
|
*/ |
|
|
|
|
|
errorReturn: |
|
|
if (varPtr != NULL) { |
|
|
if (TclIsVarUndefined(varPtr)) { |
|
|
CleanupVar(varPtr, NULL); /* note: array isn't in hashtable */ |
|
|
} |
|
|
} |
|
|
return resultPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TclIncrVar2 -- |
|
|
* |
|
|
* Given a two-part variable name, which may refer either to a scalar |
|
|
* variable or an element of an array, increment the Tcl object value |
|
|
* of the variable by a specified amount. |
|
|
* |
|
|
* Results: |
|
|
* Returns a pointer to the Tcl_Obj holding the new value of the |
|
|
* variable. If the specified variable doesn't exist, or there is a |
|
|
* clash in array usage, or an error occurs while executing variable |
|
|
* traces, then NULL is returned and a message will be left in |
|
|
* the interpreter's result. |
|
|
* |
|
|
* Side effects: |
|
|
* The value of the given variable is incremented by the specified |
|
|
* amount. If either the array or the entry didn't exist then a new |
|
|
* variable is created. The ref count for the returned object is _not_ |
|
|
* incremented to reflect the returned reference; if you want to keep a |
|
|
* reference to the object you must increment its ref count yourself. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
Tcl_Obj * |
|
|
TclIncrVar2(interp, part1Ptr, part2Ptr, incrAmount, flags) |
|
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
|
|
* to be found. */ |
|
|
Tcl_Obj *part1Ptr; /* Points to an object holding the name of |
|
|
* an array (if part2 is non-NULL) or the |
|
|
* name of a variable. */ |
|
|
Tcl_Obj *part2Ptr; /* If non-null, points to an object holding |
|
|
* the name of an element in the array |
|
|
* part1Ptr. */ |
|
|
long incrAmount; /* Amount to be added to variable. */ |
|
|
int flags; /* Various flags that tell how to incr value: |
|
|
* any of TCL_GLOBAL_ONLY, |
|
|
* TCL_NAMESPACE_ONLY, TCL_APPEND_VALUE, |
|
|
* TCL_LIST_ELEMENT, TCL_LEAVE_ERR_MSG. */ |
|
|
{ |
|
|
register Tcl_Obj *varValuePtr; |
|
|
Tcl_Obj *resultPtr; |
|
|
int createdNewObj; /* Set 1 if var's value object is shared |
|
|
* so we must increment a copy (i.e. copy |
|
|
* on write). */ |
|
|
long i; |
|
|
int result; |
|
|
|
|
|
varValuePtr = Tcl_ObjGetVar2(interp, part1Ptr, part2Ptr, flags); |
|
|
if (varValuePtr == NULL) { |
|
|
Tcl_AddObjErrorInfo(interp, |
|
|
"\n (reading value of variable to increment)", -1); |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Increment the variable's value. If the object is unshared we can |
|
|
* modify it directly, otherwise we must create a new copy to modify: |
|
|
* this is "copy on write". Then free the variable's old string |
|
|
* representation, if any, since it will no longer be valid. |
|
|
*/ |
|
|
|
|
|
createdNewObj = 0; |
|
|
if (Tcl_IsShared(varValuePtr)) { |
|
|
varValuePtr = Tcl_DuplicateObj(varValuePtr); |
|
|
createdNewObj = 1; |
|
|
} |
|
|
result = Tcl_GetLongFromObj(interp, varValuePtr, &i); |
|
|
if (result != TCL_OK) { |
|
|
if (createdNewObj) { |
|
|
Tcl_DecrRefCount(varValuePtr); /* free unneeded copy */ |
|
|
} |
|
|
return NULL; |
|
|
} |
|
|
Tcl_SetLongObj(varValuePtr, (i + incrAmount)); |
|
|
|
|
|
/* |
|
|
* Store the variable's new value and run any write traces. |
|
|
*/ |
|
|
|
|
|
resultPtr = Tcl_ObjSetVar2(interp, part1Ptr, part2Ptr, varValuePtr, flags); |
|
|
if (resultPtr == NULL) { |
|
|
return NULL; |
|
|
} |
|
|
return resultPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TclIncrIndexedScalar -- |
|
|
* |
|
|
* Increments the Tcl object value of a local scalar variable in the |
|
|
* active procedure, given its compile-time allocated index in the |
|
|
* procedure's array of local variables. |
|
|
* |
|
|
* Results: |
|
|
* Returns a pointer to the Tcl_Obj holding the new value of the |
|
|
* variable given by localIndex. If the specified variable doesn't |
|
|
* exist, or there is a clash in array usage, or an error occurs while |
|
|
* executing variable traces, then NULL is returned and a message will |
|
|
* be left in the interpreter's result. |
|
|
* |
|
|
* Side effects: |
|
|
* The value of the given variable is incremented by the specified |
|
|
* amount. The ref count for the returned object is _not_ incremented |
|
|
* to reflect the returned reference; if you want to keep a reference |
|
|
* to the object you must increment its ref count yourself. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
Tcl_Obj * |
|
|
TclIncrIndexedScalar(interp, localIndex, incrAmount) |
|
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
|
|
* to be found. */ |
|
|
int localIndex; /* Index of variable in procedure's array |
|
|
* of local variables. */ |
|
|
long incrAmount; /* Amount to be added to variable. */ |
|
|
{ |
|
|
register Tcl_Obj *varValuePtr; |
|
|
Tcl_Obj *resultPtr; |
|
|
int createdNewObj; /* Set 1 if var's value object is shared |
|
|
* so we must increment a copy (i.e. copy |
|
|
* on write). */ |
|
|
long i; |
|
|
int result; |
|
|
|
|
|
varValuePtr = TclGetIndexedScalar(interp, localIndex, |
|
|
/*leaveErrorMsg*/ 1); |
|
|
if (varValuePtr == NULL) { |
|
|
Tcl_AddObjErrorInfo(interp, |
|
|
"\n (reading value of variable to increment)", -1); |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Reach into the object's representation to extract and increment the |
|
|
* variable's value. If the object is unshared we can modify it |
|
|
* directly, otherwise we must create a new copy to modify: this is |
|
|
* "copy on write". Then free the variable's old string representation, |
|
|
* if any, since it will no longer be valid. |
|
|
*/ |
|
|
|
|
|
createdNewObj = 0; |
|
|
if (Tcl_IsShared(varValuePtr)) { |
|
|
createdNewObj = 1; |
|
|
varValuePtr = Tcl_DuplicateObj(varValuePtr); |
|
|
} |
|
|
result = Tcl_GetLongFromObj(interp, varValuePtr, &i); |
|
|
if (result != TCL_OK) { |
|
|
if (createdNewObj) { |
|
|
Tcl_DecrRefCount(varValuePtr); /* free unneeded copy */ |
|
|
} |
|
|
return NULL; |
|
|
} |
|
|
Tcl_SetLongObj(varValuePtr, (i + incrAmount)); |
|
|
|
|
|
/* |
|
|
* Store the variable's new value and run any write traces. |
|
|
*/ |
|
|
|
|
|
resultPtr = TclSetIndexedScalar(interp, localIndex, varValuePtr, |
|
|
/*leaveErrorMsg*/ 1); |
|
|
if (resultPtr == NULL) { |
|
|
return NULL; |
|
|
} |
|
|
return resultPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TclIncrElementOfIndexedArray -- |
|
|
* |
|
|
* Increments the Tcl object value of an element in a local array |
|
|
* variable. The element is named by the object elemPtr while the array |
|
|
* is specified by its index in the active procedure's array of |
|
|
* compiler allocated local variables. |
|
|
* |
|
|
* Results: |
|
|
* Returns a pointer to the Tcl_Obj holding the new value of the |
|
|
* element. If the specified array or element doesn't exist, or there |
|
|
* is a clash in array usage, or an error occurs while executing |
|
|
* variable traces, then NULL is returned and a message will be left in |
|
|
* the interpreter's result. |
|
|
* |
|
|
* Side effects: |
|
|
* The value of the given array element is incremented by the specified |
|
|
* amount. The ref count for the returned object is _not_ incremented |
|
|
* to reflect the returned reference; if you want to keep a reference |
|
|
* to the object you must increment its ref count yourself. If the |
|
|
* entry doesn't exist then a new variable is created. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
Tcl_Obj * |
|
|
TclIncrElementOfIndexedArray(interp, localIndex, elemPtr, incrAmount) |
|
|
Tcl_Interp *interp; /* Command interpreter in which the array is |
|
|
* to be found. */ |
|
|
int localIndex; /* Index of array variable in procedure's |
|
|
* array of local variables. */ |
|
|
Tcl_Obj *elemPtr; /* Points to an object holding the name of |
|
|
* an element to increment in the array. */ |
|
|
long incrAmount; /* Amount to be added to variable. */ |
|
|
{ |
|
|
register Tcl_Obj *varValuePtr; |
|
|
Tcl_Obj *resultPtr; |
|
|
int createdNewObj; /* Set 1 if var's value object is shared |
|
|
* so we must increment a copy (i.e. copy |
|
|
* on write). */ |
|
|
long i; |
|
|
int result; |
|
|
|
|
|
varValuePtr = TclGetElementOfIndexedArray(interp, localIndex, elemPtr, |
|
|
/*leaveErrorMsg*/ 1); |
|
|
if (varValuePtr == NULL) { |
|
|
Tcl_AddObjErrorInfo(interp, |
|
|
"\n (reading value of variable to increment)", -1); |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Reach into the object's representation to extract and increment the |
|
|
* variable's value. If the object is unshared we can modify it |
|
|
* directly, otherwise we must create a new copy to modify: this is |
|
|
* "copy on write". Then free the variable's old string representation, |
|
|
* if any, since it will no longer be valid. |
|
|
*/ |
|
|
|
|
|
createdNewObj = 0; |
|
|
if (Tcl_IsShared(varValuePtr)) { |
|
|
createdNewObj = 1; |
|
|
varValuePtr = Tcl_DuplicateObj(varValuePtr); |
|
|
} |
|
|
result = Tcl_GetLongFromObj(interp, varValuePtr, &i); |
|
|
if (result != TCL_OK) { |
|
|
if (createdNewObj) { |
|
|
Tcl_DecrRefCount(varValuePtr); /* free unneeded copy */ |
|
|
} |
|
|
return NULL; |
|
|
} |
|
|
Tcl_SetLongObj(varValuePtr, (i + incrAmount)); |
|
|
|
|
|
/* |
|
|
* Store the variable's new value and run any write traces. |
|
|
*/ |
|
|
|
|
|
resultPtr = TclSetElementOfIndexedArray(interp, localIndex, elemPtr, |
|
|
varValuePtr, |
|
|
/*leaveErrorMsg*/ 1); |
|
|
if (resultPtr == NULL) { |
|
|
return NULL; |
|
|
} |
|
|
return resultPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_UnsetVar -- |
|
|
* |
|
|
* Delete a variable, so that it may not be accessed anymore. |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if the variable was successfully deleted, TCL_ERROR |
|
|
* if the variable can't be unset. In the event of an error, |
|
|
* if the TCL_LEAVE_ERR_MSG flag is set then an error message |
|
|
* is left in the interp's result. |
|
|
* |
|
|
* Side effects: |
|
|
* If varName is defined as a local or global variable in interp, |
|
|
* it is deleted. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
Tcl_UnsetVar(interp, varName, flags) |
|
|
Tcl_Interp *interp; /* Command interpreter in which varName is |
|
|
* to be looked up. */ |
|
|
char *varName; /* Name of a variable in interp. May be |
|
|
* either a scalar name or an array name |
|
|
* or an element in an array. */ |
|
|
int flags; /* OR-ed combination of any of |
|
|
* TCL_GLOBAL_ONLY, TCL_NAMESPACE_ONLY or |
|
|
* TCL_LEAVE_ERR_MSG. */ |
|
|
{ |
|
|
return Tcl_UnsetVar2(interp, varName, (char *) NULL, flags); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_UnsetVar2 -- |
|
|
* |
|
|
* Delete a variable, given a 2-part name. |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if the variable was successfully deleted, TCL_ERROR |
|
|
* if the variable can't be unset. In the event of an error, |
|
|
* if the TCL_LEAVE_ERR_MSG flag is set then an error message |
|
|
* is left in the interp's result. |
|
|
* |
|
|
* Side effects: |
|
|
* If part1 and part2 indicate a local or global variable in interp, |
|
|
* it is deleted. If part1 is an array name and part2 is NULL, then |
|
|
* the whole array is deleted. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
Tcl_UnsetVar2(interp, part1, part2, flags) |
|
|
Tcl_Interp *interp; /* Command interpreter in which varName is |
|
|
* to be looked up. */ |
|
|
char *part1; /* Name of variable or array. */ |
|
|
char *part2; /* Name of element within array or NULL. */ |
|
|
int flags; /* OR-ed combination of any of |
|
|
* TCL_GLOBAL_ONLY, TCL_NAMESPACE_ONLY, |
|
|
* TCL_LEAVE_ERR_MSG. */ |
|
|
{ |
|
|
Var dummyVar; |
|
|
Var *varPtr, *dummyVarPtr; |
|
|
Interp *iPtr = (Interp *) interp; |
|
|
Var *arrayPtr; |
|
|
ActiveVarTrace *activePtr; |
|
|
Tcl_Obj *objPtr; |
|
|
int result; |
|
|
|
|
|
varPtr = TclLookupVar(interp, part1, part2, flags, "unset", |
|
|
/*createPart1*/ 0, /*createPart2*/ 0, &arrayPtr); |
|
|
if (varPtr == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
result = (TclIsVarUndefined(varPtr)? TCL_ERROR : TCL_OK); |
|
|
|
|
|
if ((arrayPtr != NULL) && (arrayPtr->searchPtr != NULL)) { |
|
|
DeleteSearches(arrayPtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
* The code below is tricky, because of the possibility that |
|
|
* a trace procedure might try to access a variable being |
|
|
* deleted. To handle this situation gracefully, do things |
|
|
* in three steps: |
|
|
* 1. Copy the contents of the variable to a dummy variable |
|
|
* structure, and mark the original Var structure as undefined. |
|
|
* 2. Invoke traces and clean up the variable, using the dummy copy. |
|
|
* 3. If at the end of this the original variable is still |
|
|
* undefined and has no outstanding references, then delete |
|
|
* it (but it could have gotten recreated by a trace). |
|
|
*/ |
|
|
|
|
|
dummyVar = *varPtr; |
|
|
TclSetVarUndefined(varPtr); |
|
|
TclSetVarScalar(varPtr); |
|
|
varPtr->value.objPtr = NULL; /* dummyVar points to any value object */ |
|
|
varPtr->tracePtr = NULL; |
|
|
varPtr->searchPtr = NULL; |
|
|
|
|
|
/* |
|
|
* Call trace procedures for the variable being deleted. Then delete |
|
|
* its traces. Be sure to abort any other traces for the variable |
|
|
* that are still pending. Special tricks: |
|
|
* 1. We need to increment varPtr's refCount around this: CallTraces |
|
|
* will use dummyVar so it won't increment varPtr's refCount itself. |
|
|
* 2. Turn off the VAR_TRACE_ACTIVE flag in dummyVar: we want to |
|
|
* call unset traces even if other traces are pending. |
|
|
*/ |
|
|
|
|
|
if ((dummyVar.tracePtr != NULL) |
|
|
|| ((arrayPtr != NULL) && (arrayPtr->tracePtr != NULL))) { |
|
|
varPtr->refCount++; |
|
|
dummyVar.flags &= ~VAR_TRACE_ACTIVE; |
|
|
(void) CallTraces(iPtr, arrayPtr, &dummyVar, part1, part2, |
|
|
(flags & (TCL_GLOBAL_ONLY|TCL_NAMESPACE_ONLY)) | TCL_TRACE_UNSETS); |
|
|
while (dummyVar.tracePtr != NULL) { |
|
|
VarTrace *tracePtr = dummyVar.tracePtr; |
|
|
dummyVar.tracePtr = tracePtr->nextPtr; |
|
|
ckfree((char *) tracePtr); |
|
|
} |
|
|
for (activePtr = iPtr->activeTracePtr; activePtr != NULL; |
|
|
activePtr = activePtr->nextPtr) { |
|
|
if (activePtr->varPtr == varPtr) { |
|
|
activePtr->nextTracePtr = NULL; |
|
|
} |
|
|
} |
|
|
varPtr->refCount--; |
|
|
} |
|
|
|
|
|
/* |
|
|
* If the variable is an array, delete all of its elements. This must be |
|
|
* done after calling the traces on the array, above (that's the way |
|
|
* traces are defined). If it is a scalar, "discard" its object |
|
|
* (decrement the ref count of its object, if any). |
|
|
*/ |
|
|
|
|
|
dummyVarPtr = &dummyVar; |
|
|
if (TclIsVarArray(dummyVarPtr) && !TclIsVarUndefined(dummyVarPtr)) { |
|
|
/* |
|
|
* Deleting the elements of the array may cause traces to be fired |
|
|
* on those elements. Before deleting them, bump the reference count |
|
|
* of the array, so that if those trace procs make a global or upvar |
|
|
* link to the array, the array is not deleted when the call stack |
|
|
* gets popped (we will delete the array ourselves later in this |
|
|
* function). |
|
|
* |
|
|
* Bumping the count can lead to the odd situation that elements of the |
|
|
* array are being deleted when the array still exists, but since the |
|
|
* array is about to be removed anyway, that shouldn't really matter. |
|
|
*/ |
|
|
varPtr->refCount++; |
|
|
DeleteArray(iPtr, part1, dummyVarPtr, |
|
|
(flags & (TCL_GLOBAL_ONLY|TCL_NAMESPACE_ONLY)) | TCL_TRACE_UNSETS); |
|
|
/* Decr ref count */ |
|
|
varPtr->refCount--; |
|
|
} |
|
|
if (TclIsVarScalar(dummyVarPtr) |
|
|
&& (dummyVarPtr->value.objPtr != NULL)) { |
|
|
objPtr = dummyVarPtr->value.objPtr; |
|
|
TclDecrRefCount(objPtr); |
|
|
dummyVarPtr->value.objPtr = NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
* If the variable was a namespace variable, decrement its reference count. |
|
|
*/ |
|
|
|
|
|
if (varPtr->flags & VAR_NAMESPACE_VAR) { |
|
|
varPtr->flags &= ~VAR_NAMESPACE_VAR; |
|
|
varPtr->refCount--; |
|
|
} |
|
|
|
|
|
/* |
|
|
* It's an error to unset an undefined variable. |
|
|
*/ |
|
|
|
|
|
if (result != TCL_OK) { |
|
|
if (flags & TCL_LEAVE_ERR_MSG) { |
|
|
VarErrMsg(interp, part1, part2, "unset", |
|
|
((arrayPtr == NULL) ? noSuchVar : noSuchElement)); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Finally, if the variable is truly not in use then free up its Var |
|
|
* structure and remove it from its hash table, if any. The ref count of |
|
|
* its value object, if any, was decremented above. |
|
|
*/ |
|
|
|
|
|
CleanupVar(varPtr, arrayPtr); |
|
|
return result; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_TraceVar -- |
|
|
* |
|
|
* Arrange for reads and/or writes to a variable to cause a |
|
|
* procedure to be invoked, which can monitor the operations |
|
|
* and/or change their actions. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl return value. |
|
|
* |
|
|
* Side effects: |
|
|
* A trace is set up on the variable given by varName, such that |
|
|
* future references to the variable will be intermediated by |
|
|
* proc. See the manual entry for complete details on the calling |
|
|
* sequence for proc. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
Tcl_TraceVar(interp, varName, flags, proc, clientData) |
|
|
Tcl_Interp *interp; /* Interpreter in which variable is |
|
|
* to be traced. */ |
|
|
char *varName; /* Name of variable; may end with "(index)" |
|
|
* to signify an array reference. */ |
|
|
int flags; /* OR-ed collection of bits, including any |
|
|
* of TCL_TRACE_READS, TCL_TRACE_WRITES, |
|
|
* TCL_TRACE_UNSETS, TCL_GLOBAL_ONLY, and |
|
|
* TCL_NAMESPACE_ONLY. */ |
|
|
Tcl_VarTraceProc *proc; /* Procedure to call when specified ops are |
|
|
* invoked upon varName. */ |
|
|
ClientData clientData; /* Arbitrary argument to pass to proc. */ |
|
|
{ |
|
|
return Tcl_TraceVar2(interp, varName, (char *) NULL, |
|
|
flags, proc, clientData); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_TraceVar2 -- |
|
|
* |
|
|
* Arrange for reads and/or writes to a variable to cause a |
|
|
* procedure to be invoked, which can monitor the operations |
|
|
* and/or change their actions. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl return value. |
|
|
* |
|
|
* Side effects: |
|
|
* A trace is set up on the variable given by part1 and part2, such |
|
|
* that future references to the variable will be intermediated by |
|
|
* proc. See the manual entry for complete details on the calling |
|
|
* sequence for proc. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
Tcl_TraceVar2(interp, part1, part2, flags, proc, clientData) |
|
|
Tcl_Interp *interp; /* Interpreter in which variable is |
|
|
* to be traced. */ |
|
|
char *part1; /* Name of scalar variable or array. */ |
|
|
char *part2; /* Name of element within array; NULL means |
|
|
* trace applies to scalar variable or array |
|
|
* as-a-whole. */ |
|
|
int flags; /* OR-ed collection of bits, including any |
|
|
* of TCL_TRACE_READS, TCL_TRACE_WRITES, |
|
|
* TCL_TRACE_UNSETS, TCL_GLOBAL_ONLY, |
|
|
* and TCL_NAMESPACE_ONLY. */ |
|
|
Tcl_VarTraceProc *proc; /* Procedure to call when specified ops are |
|
|
* invoked upon varName. */ |
|
|
ClientData clientData; /* Arbitrary argument to pass to proc. */ |
|
|
{ |
|
|
Var *varPtr, *arrayPtr; |
|
|
register VarTrace *tracePtr; |
|
|
|
|
|
varPtr = TclLookupVar(interp, part1, part2, (flags | TCL_LEAVE_ERR_MSG), |
|
|
"trace", /*createPart1*/ 1, /*createPart2*/ 1, &arrayPtr); |
|
|
if (varPtr == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Set up trace information. |
|
|
*/ |
|
|
|
|
|
tracePtr = (VarTrace *) ckalloc(sizeof(VarTrace)); |
|
|
tracePtr->traceProc = proc; |
|
|
tracePtr->clientData = clientData; |
|
|
tracePtr->flags = |
|
|
flags & (TCL_TRACE_READS | TCL_TRACE_WRITES | TCL_TRACE_UNSETS | |
|
|
TCL_TRACE_ARRAY); |
|
|
tracePtr->nextPtr = varPtr->tracePtr; |
|
|
varPtr->tracePtr = tracePtr; |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_UntraceVar -- |
|
|
* |
|
|
* Remove a previously-created trace for a variable. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* If there exists a trace for the variable given by varName |
|
|
* with the given flags, proc, and clientData, then that trace |
|
|
* is removed. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
Tcl_UntraceVar(interp, varName, flags, proc, clientData) |
|
|
Tcl_Interp *interp; /* Interpreter containing variable. */ |
|
|
char *varName; /* Name of variable; may end with "(index)" |
|
|
* to signify an array reference. */ |
|
|
int flags; /* OR-ed collection of bits describing |
|
|
* current trace, including any of |
|
|
* TCL_TRACE_READS, TCL_TRACE_WRITES, |
|
|
* TCL_TRACE_UNSETS, TCL_GLOBAL_ONLY |
|
|
* and TCL_NAMESPACE_ONLY. */ |
|
|
Tcl_VarTraceProc *proc; /* Procedure assocated with trace. */ |
|
|
ClientData clientData; /* Arbitrary argument to pass to proc. */ |
|
|
{ |
|
|
Tcl_UntraceVar2(interp, varName, (char *) NULL, flags, proc, clientData); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_UntraceVar2 -- |
|
|
* |
|
|
* Remove a previously-created trace for a variable. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* If there exists a trace for the variable given by part1 |
|
|
* and part2 with the given flags, proc, and clientData, then |
|
|
* that trace is removed. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
Tcl_UntraceVar2(interp, part1, part2, flags, proc, clientData) |
|
|
Tcl_Interp *interp; /* Interpreter containing variable. */ |
|
|
char *part1; /* Name of variable or array. */ |
|
|
char *part2; /* Name of element within array; NULL means |
|
|
* trace applies to scalar variable or array |
|
|
* as-a-whole. */ |
|
|
int flags; /* OR-ed collection of bits describing |
|
|
* current trace, including any of |
|
|
* TCL_TRACE_READS, TCL_TRACE_WRITES, |
|
|
* TCL_TRACE_UNSETS, TCL_GLOBAL_ONLY, |
|
|
* and TCL_NAMESPACE_ONLY. */ |
|
|
Tcl_VarTraceProc *proc; /* Procedure assocated with trace. */ |
|
|
ClientData clientData; /* Arbitrary argument to pass to proc. */ |
|
|
{ |
|
|
register VarTrace *tracePtr; |
|
|
VarTrace *prevPtr; |
|
|
Var *varPtr, *arrayPtr; |
|
|
Interp *iPtr = (Interp *) interp; |
|
|
ActiveVarTrace *activePtr; |
|
|
|
|
|
varPtr = TclLookupVar(interp, part1, part2, |
|
|
flags & (TCL_GLOBAL_ONLY|TCL_NAMESPACE_ONLY), |
|
|
/*msg*/ (char *) NULL, |
|
|
/*createPart1*/ 0, /*createPart2*/ 0, &arrayPtr); |
|
|
if (varPtr == NULL) { |
|
|
return; |
|
|
} |
|
|
|
|
|
flags &= (TCL_TRACE_READS | TCL_TRACE_WRITES | TCL_TRACE_UNSETS | |
|
|
TCL_TRACE_ARRAY); |
|
|
for (tracePtr = varPtr->tracePtr, prevPtr = NULL; ; |
|
|
prevPtr = tracePtr, tracePtr = tracePtr->nextPtr) { |
|
|
if (tracePtr == NULL) { |
|
|
return; |
|
|
} |
|
|
if ((tracePtr->traceProc == proc) && (tracePtr->flags == flags) |
|
|
&& (tracePtr->clientData == clientData)) { |
|
|
break; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* The code below makes it possible to delete traces while traces |
|
|
* are active: it makes sure that the deleted trace won't be |
|
|
* processed by CallTraces. |
|
|
*/ |
|
|
|
|
|
for (activePtr = iPtr->activeTracePtr; activePtr != NULL; |
|
|
activePtr = activePtr->nextPtr) { |
|
|
if (activePtr->nextTracePtr == tracePtr) { |
|
|
activePtr->nextTracePtr = tracePtr->nextPtr; |
|
|
} |
|
|
} |
|
|
if (prevPtr == NULL) { |
|
|
varPtr->tracePtr = tracePtr->nextPtr; |
|
|
} else { |
|
|
prevPtr->nextPtr = tracePtr->nextPtr; |
|
|
} |
|
|
ckfree((char *) tracePtr); |
|
|
|
|
|
/* |
|
|
* If this is the last trace on the variable, and the variable is |
|
|
* unset and unused, then free up the variable. |
|
|
*/ |
|
|
|
|
|
if (TclIsVarUndefined(varPtr)) { |
|
|
CleanupVar(varPtr, (Var *) NULL); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_VarTraceInfo -- |
|
|
* |
|
|
* Return the clientData value associated with a trace on a |
|
|
* variable. This procedure can also be used to step through |
|
|
* all of the traces on a particular variable that have the |
|
|
* same trace procedure. |
|
|
* |
|
|
* Results: |
|
|
* The return value is the clientData value associated with |
|
|
* a trace on the given variable. Information will only be |
|
|
* returned for a trace with proc as trace procedure. If |
|
|
* the clientData argument is NULL then the first such trace is |
|
|
* returned; otherwise, the next relevant one after the one |
|
|
* given by clientData will be returned. If the variable |
|
|
* doesn't exist, or if there are no (more) traces for it, |
|
|
* then NULL is returned. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
ClientData |
|
|
Tcl_VarTraceInfo(interp, varName, flags, proc, prevClientData) |
|
|
Tcl_Interp *interp; /* Interpreter containing variable. */ |
|
|
char *varName; /* Name of variable; may end with "(index)" |
|
|
* to signify an array reference. */ |
|
|
int flags; /* OR-ed combo or TCL_GLOBAL_ONLY, |
|
|
* TCL_NAMESPACE_ONLY (can be 0). */ |
|
|
Tcl_VarTraceProc *proc; /* Procedure assocated with trace. */ |
|
|
ClientData prevClientData; /* If non-NULL, gives last value returned |
|
|
* by this procedure, so this call will |
|
|
* return the next trace after that one. |
|
|
* If NULL, this call will return the |
|
|
* first trace. */ |
|
|
{ |
|
|
return Tcl_VarTraceInfo2(interp, varName, (char *) NULL, |
|
|
flags, proc, prevClientData); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_VarTraceInfo2 -- |
|
|
* |
|
|
* Same as Tcl_VarTraceInfo, except takes name in two pieces |
|
|
* instead of one. |
|
|
* |
|
|
* Results: |
|
|
* Same as Tcl_VarTraceInfo. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
ClientData |
|
|
Tcl_VarTraceInfo2(interp, part1, part2, flags, proc, prevClientData) |
|
|
Tcl_Interp *interp; /* Interpreter containing variable. */ |
|
|
char *part1; /* Name of variable or array. */ |
|
|
char *part2; /* Name of element within array; NULL means |
|
|
* trace applies to scalar variable or array |
|
|
* as-a-whole. */ |
|
|
int flags; /* OR-ed combination of TCL_GLOBAL_ONLY, |
|
|
* TCL_NAMESPACE_ONLY. */ |
|
|
Tcl_VarTraceProc *proc; /* Procedure assocated with trace. */ |
|
|
ClientData prevClientData; /* If non-NULL, gives last value returned |
|
|
* by this procedure, so this call will |
|
|
* return the next trace after that one. |
|
|
* If NULL, this call will return the |
|
|
* first trace. */ |
|
|
{ |
|
|
register VarTrace *tracePtr; |
|
|
Var *varPtr, *arrayPtr; |
|
|
|
|
|
varPtr = TclLookupVar(interp, part1, part2, |
|
|
flags & (TCL_GLOBAL_ONLY|TCL_NAMESPACE_ONLY), |
|
|
/*msg*/ (char *) NULL, |
|
|
/*createPart1*/ 0, /*createPart2*/ 0, &arrayPtr); |
|
|
if (varPtr == NULL) { |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Find the relevant trace, if any, and return its clientData. |
|
|
*/ |
|
|
|
|
|
tracePtr = varPtr->tracePtr; |
|
|
if (prevClientData != NULL) { |
|
|
for ( ; tracePtr != NULL; tracePtr = tracePtr->nextPtr) { |
|
|
if ((tracePtr->clientData == prevClientData) |
|
|
&& (tracePtr->traceProc == proc)) { |
|
|
tracePtr = tracePtr->nextPtr; |
|
|
break; |
|
|
} |
|
|
} |
|
|
} |
|
|
for ( ; tracePtr != NULL; tracePtr = tracePtr->nextPtr) { |
|
|
if (tracePtr->traceProc == proc) { |
|
|
return tracePtr->clientData; |
|
|
} |
|
|
} |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_UnsetObjCmd -- |
|
|
* |
|
|
* This object-based procedure is invoked to process the "unset" Tcl |
|
|
* command. See the user documentation for details on what it does. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl object result value. |
|
|
* |
|
|
* Side effects: |
|
|
* See the user documentation. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
/* ARGSUSED */ |
|
|
int |
|
|
Tcl_UnsetObjCmd(dummy, interp, objc, objv) |
|
|
ClientData dummy; /* Not used. */ |
|
|
Tcl_Interp *interp; /* Current interpreter. */ |
|
|
int objc; /* Number of arguments. */ |
|
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
|
|
{ |
|
|
register int i; |
|
|
register char *name; |
|
|
|
|
|
if (objc < 2) { |
|
|
Tcl_WrongNumArgs(interp, 1, objv, "varName ?varName ...?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
for (i = 1; i < objc; i++) { |
|
|
name = TclGetString(objv[i]); |
|
|
if (Tcl_UnsetVar2(interp, name, (char *) NULL, |
|
|
TCL_LEAVE_ERR_MSG) != TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_AppendObjCmd -- |
|
|
* |
|
|
* This object-based procedure is invoked to process the "append" |
|
|
* Tcl command. See the user documentation for details on what it does. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl object result value. |
|
|
* |
|
|
* Side effects: |
|
|
* A variable's value may be changed. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
/* ARGSUSED */ |
|
|
int |
|
|
Tcl_AppendObjCmd(dummy, interp, objc, objv) |
|
|
ClientData dummy; /* Not used. */ |
|
|
Tcl_Interp *interp; /* Current interpreter. */ |
|
|
int objc; /* Number of arguments. */ |
|
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
|
|
{ |
|
|
register Tcl_Obj *varValuePtr = NULL; |
|
|
/* Initialized to avoid compiler |
|
|
* warning. */ |
|
|
int i; |
|
|
|
|
|
if (objc < 2) { |
|
|
Tcl_WrongNumArgs(interp, 1, objv, "varName ?value value ...?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (objc == 2) { |
|
|
varValuePtr = Tcl_ObjGetVar2(interp, objv[1], NULL, TCL_LEAVE_ERR_MSG); |
|
|
if (varValuePtr == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} else { |
|
|
for (i = 2; i < objc; i++) { |
|
|
varValuePtr = Tcl_ObjSetVar2(interp, objv[1], (Tcl_Obj *) NULL, |
|
|
objv[i], (TCL_APPEND_VALUE | TCL_LEAVE_ERR_MSG)); |
|
|
if (varValuePtr == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
} |
|
|
Tcl_SetObjResult(interp, varValuePtr); |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_LappendObjCmd -- |
|
|
* |
|
|
* This object-based procedure is invoked to process the "lappend" |
|
|
* Tcl command. See the user documentation for details on what it does. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl object result value. |
|
|
* |
|
|
* Side effects: |
|
|
* A variable's value may be changed. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
/* ARGSUSED */ |
|
|
int |
|
|
Tcl_LappendObjCmd(dummy, interp, objc, objv) |
|
|
ClientData dummy; /* Not used. */ |
|
|
Tcl_Interp *interp; /* Current interpreter. */ |
|
|
int objc; /* Number of arguments. */ |
|
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
|
|
{ |
|
|
Tcl_Obj *varValuePtr, *newValuePtr; |
|
|
register List *listRepPtr; |
|
|
register Tcl_Obj **elemPtrs; |
|
|
int numElems, numRequired, createdNewObj, createVar, i, j; |
|
|
|
|
|
if (objc < 2) { |
|
|
Tcl_WrongNumArgs(interp, 1, objv, "varName ?value value ...?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (objc == 2) { |
|
|
newValuePtr = Tcl_ObjGetVar2(interp, objv[1], (Tcl_Obj *) NULL, |
|
|
(TCL_LEAVE_ERR_MSG)); |
|
|
if (newValuePtr == NULL) { |
|
|
/* |
|
|
* The variable doesn't exist yet. Just create it with an empty |
|
|
* initial value. |
|
|
*/ |
|
|
|
|
|
Tcl_Obj *nullObjPtr = Tcl_NewObj(); |
|
|
newValuePtr = Tcl_ObjSetVar2(interp, objv[1], NULL, |
|
|
nullObjPtr, TCL_LEAVE_ERR_MSG); |
|
|
if (newValuePtr == NULL) { |
|
|
Tcl_DecrRefCount(nullObjPtr); /* free unneeded object */ |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
} else { |
|
|
/* |
|
|
* We have arguments to append. We used to call Tcl_SetVar2 to |
|
|
* append each argument one at a time to ensure that traces were run |
|
|
* for each append step. We now append the arguments all at once |
|
|
* because it's faster. Note that a read trace and a write trace for |
|
|
* the variable will now each only be called once. Also, if the |
|
|
* variable's old value is unshared we modify it directly, otherwise |
|
|
* we create a new copy to modify: this is "copy on write". |
|
|
*/ |
|
|
|
|
|
createdNewObj = 0; |
|
|
createVar = 1; |
|
|
varValuePtr = Tcl_ObjGetVar2(interp, objv[1], NULL, 0); |
|
|
if (varValuePtr == NULL) { |
|
|
/* |
|
|
* We couldn't read the old value: either the var doesn't yet |
|
|
* exist or it's an array element. If it's new, we will try to |
|
|
* create it with Tcl_ObjSetVar2 below. |
|
|
*/ |
|
|
|
|
|
char *p, *varName; |
|
|
int nameBytes, i; |
|
|
|
|
|
varName = Tcl_GetStringFromObj(objv[1], &nameBytes); |
|
|
for (i = 0, p = varName; i < nameBytes; i++, p++) { |
|
|
if (*p == '(') { |
|
|
p = (varName + nameBytes-1); |
|
|
if (*p == ')') { /* last char is ')' => array ref */ |
|
|
createVar = 0; |
|
|
} |
|
|
break; |
|
|
} |
|
|
} |
|
|
varValuePtr = Tcl_NewObj(); |
|
|
createdNewObj = 1; |
|
|
} else if (Tcl_IsShared(varValuePtr)) { |
|
|
varValuePtr = Tcl_DuplicateObj(varValuePtr); |
|
|
createdNewObj = 1; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Convert the variable's old value to a list object if necessary. |
|
|
*/ |
|
|
|
|
|
if (varValuePtr->typePtr != &tclListType) { |
|
|
int result = tclListType.setFromAnyProc(interp, varValuePtr); |
|
|
if (result != TCL_OK) { |
|
|
if (createdNewObj) { |
|
|
Tcl_DecrRefCount(varValuePtr); /* free unneeded obj. */ |
|
|
} |
|
|
return result; |
|
|
} |
|
|
} |
|
|
listRepPtr = (List *) varValuePtr->internalRep.otherValuePtr; |
|
|
elemPtrs = listRepPtr->elements; |
|
|
numElems = listRepPtr->elemCount; |
|
|
|
|
|
/* |
|
|
* If there is no room in the current array of element pointers, |
|
|
* allocate a new, larger array and copy the pointers to it. |
|
|
*/ |
|
|
|
|
|
numRequired = numElems + (objc-2); |
|
|
if (numRequired > listRepPtr->maxElemCount) { |
|
|
int newMax = (2 * numRequired); |
|
|
Tcl_Obj **newElemPtrs = (Tcl_Obj **) |
|
|
ckalloc((unsigned) (newMax * sizeof(Tcl_Obj *))); |
|
|
|
|
|
memcpy((VOID *) newElemPtrs, (VOID *) elemPtrs, |
|
|
(size_t) (numElems * sizeof(Tcl_Obj *))); |
|
|
listRepPtr->maxElemCount = newMax; |
|
|
listRepPtr->elements = newElemPtrs; |
|
|
ckfree((char *) elemPtrs); |
|
|
elemPtrs = newElemPtrs; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Insert the new elements at the end of the list. |
|
|
*/ |
|
|
|
|
|
for (i = 2, j = numElems; i < objc; i++, j++) { |
|
|
elemPtrs[j] = objv[i]; |
|
|
Tcl_IncrRefCount(objv[i]); |
|
|
} |
|
|
listRepPtr->elemCount = numRequired; |
|
|
|
|
|
/* |
|
|
* Invalidate and free any old string representation since it no |
|
|
* longer reflects the list's internal representation. |
|
|
*/ |
|
|
|
|
|
Tcl_InvalidateStringRep(varValuePtr); |
|
|
|
|
|
/* |
|
|
* Now store the list object back into the variable. If there is an |
|
|
* error setting the new value, decrement its ref count if it |
|
|
* was new and we didn't create the variable. |
|
|
*/ |
|
|
|
|
|
newValuePtr = Tcl_ObjSetVar2(interp, objv[1], NULL, varValuePtr, |
|
|
TCL_LEAVE_ERR_MSG); |
|
|
if (newValuePtr == NULL) { |
|
|
if (createdNewObj && !createVar) { |
|
|
Tcl_DecrRefCount(varValuePtr); /* free unneeded obj */ |
|
|
} |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Set the interpreter's object result to refer to the variable's value |
|
|
* object. |
|
|
*/ |
|
|
|
|
|
Tcl_SetObjResult(interp, newValuePtr); |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_ArrayObjCmd -- |
|
|
* |
|
|
* This object-based procedure is invoked to process the "array" Tcl |
|
|
* command. See the user documentation for details on what it does. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl result object. |
|
|
* |
|
|
* Side effects: |
|
|
* See the user documentation. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
/* ARGSUSED */ |
|
|
int |
|
|
Tcl_ArrayObjCmd(dummy, interp, objc, objv) |
|
|
ClientData dummy; /* Not used. */ |
|
|
Tcl_Interp *interp; /* Current interpreter. */ |
|
|
int objc; /* Number of arguments. */ |
|
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
|
|
{ |
|
|
/* |
|
|
* The list of constants below should match the arrayOptions string array |
|
|
* below. |
|
|
*/ |
|
|
|
|
|
enum {ARRAY_ANYMORE, ARRAY_DONESEARCH, ARRAY_EXISTS, ARRAY_GET, |
|
|
ARRAY_NAMES, ARRAY_NEXTELEMENT, ARRAY_SET, ARRAY_SIZE, |
|
|
ARRAY_STARTSEARCH, ARRAY_UNSET}; |
|
|
static char *arrayOptions[] = { |
|
|
"anymore", "donesearch", "exists", "get", "names", "nextelement", |
|
|
"set", "size", "startsearch", "unset", (char *) NULL |
|
|
}; |
|
|
|
|
|
Interp *iPtr = (Interp *) interp; |
|
|
Var *varPtr, *arrayPtr; |
|
|
Tcl_HashEntry *hPtr; |
|
|
Tcl_Obj *resultPtr = Tcl_GetObjResult(interp); |
|
|
int notArray; |
|
|
char *varName, *msg; |
|
|
int index, result; |
|
|
|
|
|
|
|
|
if (objc < 3) { |
|
|
Tcl_WrongNumArgs(interp, 1, objv, "option arrayName ?arg ...?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
if (Tcl_GetIndexFromObj(interp, objv[1], arrayOptions, "option", |
|
|
0, &index) != TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Locate the array variable (and it better be an array). |
|
|
*/ |
|
|
|
|
|
varName = TclGetString(objv[2]); |
|
|
varPtr = TclLookupVar(interp, varName, (char *) NULL, /*flags*/ 0, |
|
|
/*msg*/ 0, /*createPart1*/ 0, /*createPart2*/ 0, &arrayPtr); |
|
|
|
|
|
notArray = 0; |
|
|
if ((varPtr == NULL) || !TclIsVarArray(varPtr) |
|
|
|| TclIsVarUndefined(varPtr)) { |
|
|
notArray = 1; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Special array trace used to keep the env array in sync for |
|
|
* array names, array get, etc. |
|
|
*/ |
|
|
|
|
|
if (varPtr != NULL && varPtr->tracePtr != NULL) { |
|
|
msg = CallTraces(iPtr, arrayPtr, varPtr, varName, NULL, |
|
|
(TCL_LEAVE_ERR_MSG|TCL_NAMESPACE_ONLY|TCL_GLOBAL_ONLY| |
|
|
TCL_TRACE_ARRAY)); |
|
|
if (msg != NULL) { |
|
|
VarErrMsg(interp, varName, NULL, "trace array", msg); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
|
|
|
switch (index) { |
|
|
case ARRAY_ANYMORE: { |
|
|
ArraySearch *searchPtr; |
|
|
char *searchId; |
|
|
|
|
|
if (objc != 4) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, |
|
|
"arrayName searchId"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (notArray) { |
|
|
goto error; |
|
|
} |
|
|
searchId = Tcl_GetString(objv[3]); |
|
|
searchPtr = ParseSearchId(interp, varPtr, varName, searchId); |
|
|
if (searchPtr == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
while (1) { |
|
|
Var *varPtr2; |
|
|
|
|
|
if (searchPtr->nextEntry != NULL) { |
|
|
varPtr2 = (Var *) Tcl_GetHashValue(searchPtr->nextEntry); |
|
|
if (!TclIsVarUndefined(varPtr2)) { |
|
|
break; |
|
|
} |
|
|
} |
|
|
searchPtr->nextEntry = Tcl_NextHashEntry(&searchPtr->search); |
|
|
if (searchPtr->nextEntry == NULL) { |
|
|
Tcl_SetIntObj(resultPtr, 0); |
|
|
return TCL_OK; |
|
|
} |
|
|
} |
|
|
Tcl_SetIntObj(resultPtr, 1); |
|
|
break; |
|
|
} |
|
|
case ARRAY_DONESEARCH: { |
|
|
ArraySearch *searchPtr, *prevPtr; |
|
|
char *searchId; |
|
|
|
|
|
if (objc != 4) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, |
|
|
"arrayName searchId"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (notArray) { |
|
|
goto error; |
|
|
} |
|
|
searchId = Tcl_GetString(objv[3]); |
|
|
searchPtr = ParseSearchId(interp, varPtr, varName, searchId); |
|
|
if (searchPtr == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (varPtr->searchPtr == searchPtr) { |
|
|
varPtr->searchPtr = searchPtr->nextPtr; |
|
|
} else { |
|
|
for (prevPtr = varPtr->searchPtr; ; |
|
|
prevPtr = prevPtr->nextPtr) { |
|
|
if (prevPtr->nextPtr == searchPtr) { |
|
|
prevPtr->nextPtr = searchPtr->nextPtr; |
|
|
break; |
|
|
} |
|
|
} |
|
|
} |
|
|
ckfree((char *) searchPtr); |
|
|
break; |
|
|
} |
|
|
case ARRAY_EXISTS: { |
|
|
if (objc != 3) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "arrayName"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
Tcl_SetIntObj(resultPtr, !notArray); |
|
|
break; |
|
|
} |
|
|
case ARRAY_GET: { |
|
|
Tcl_HashSearch search; |
|
|
Var *varPtr2; |
|
|
char *pattern = NULL; |
|
|
char *name; |
|
|
Tcl_Obj *namePtr, *valuePtr; |
|
|
|
|
|
if ((objc != 3) && (objc != 4)) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "arrayName ?pattern?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (notArray) { |
|
|
return TCL_OK; |
|
|
} |
|
|
if (objc == 4) { |
|
|
pattern = TclGetString(objv[3]); |
|
|
} |
|
|
for (hPtr = Tcl_FirstHashEntry(varPtr->value.tablePtr, &search); |
|
|
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { |
|
|
varPtr2 = (Var *) Tcl_GetHashValue(hPtr); |
|
|
if (TclIsVarUndefined(varPtr2)) { |
|
|
continue; |
|
|
} |
|
|
name = Tcl_GetHashKey(varPtr->value.tablePtr, hPtr); |
|
|
if ((objc == 4) && !Tcl_StringMatch(name, pattern)) { |
|
|
continue; /* element name doesn't match pattern */ |
|
|
} |
|
|
|
|
|
namePtr = Tcl_NewStringObj(name, -1); |
|
|
result = Tcl_ListObjAppendElement(interp, resultPtr, |
|
|
namePtr); |
|
|
if (result != TCL_OK) { |
|
|
Tcl_DecrRefCount(namePtr); /* free unneeded name obj */ |
|
|
return result; |
|
|
} |
|
|
|
|
|
valuePtr = Tcl_ObjGetVar2(interp, objv[2], namePtr, |
|
|
TCL_LEAVE_ERR_MSG); |
|
|
if (valuePtr == NULL) { |
|
|
Tcl_DecrRefCount(namePtr); /* free unneeded name obj */ |
|
|
return result; |
|
|
} |
|
|
result = Tcl_ListObjAppendElement(interp, resultPtr, |
|
|
valuePtr); |
|
|
if (result != TCL_OK) { |
|
|
Tcl_DecrRefCount(namePtr); /* free unneeded name obj */ |
|
|
return result; |
|
|
} |
|
|
} |
|
|
break; |
|
|
} |
|
|
case ARRAY_NAMES: { |
|
|
Tcl_HashSearch search; |
|
|
Var *varPtr2; |
|
|
char *pattern = NULL; |
|
|
char *name; |
|
|
Tcl_Obj *namePtr; |
|
|
|
|
|
if ((objc != 3) && (objc != 4)) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "arrayName ?pattern?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (notArray) { |
|
|
return TCL_OK; |
|
|
} |
|
|
if (objc == 4) { |
|
|
pattern = Tcl_GetString(objv[3]); |
|
|
} |
|
|
for (hPtr = Tcl_FirstHashEntry(varPtr->value.tablePtr, &search); |
|
|
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { |
|
|
varPtr2 = (Var *) Tcl_GetHashValue(hPtr); |
|
|
if (TclIsVarUndefined(varPtr2)) { |
|
|
continue; |
|
|
} |
|
|
name = Tcl_GetHashKey(varPtr->value.tablePtr, hPtr); |
|
|
if ((objc == 4) && !Tcl_StringMatch(name, pattern)) { |
|
|
continue; /* element name doesn't match pattern */ |
|
|
} |
|
|
|
|
|
namePtr = Tcl_NewStringObj(name, -1); |
|
|
result = Tcl_ListObjAppendElement(interp, resultPtr, namePtr); |
|
|
if (result != TCL_OK) { |
|
|
Tcl_DecrRefCount(namePtr); /* free unneeded name obj */ |
|
|
return result; |
|
|
} |
|
|
} |
|
|
break; |
|
|
} |
|
|
case ARRAY_NEXTELEMENT: { |
|
|
ArraySearch *searchPtr; |
|
|
char *searchId; |
|
|
Tcl_HashEntry *hPtr; |
|
|
|
|
|
if (objc != 4) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, |
|
|
"arrayName searchId"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (notArray) { |
|
|
goto error; |
|
|
} |
|
|
searchId = Tcl_GetString(objv[3]); |
|
|
searchPtr = ParseSearchId(interp, varPtr, varName, searchId); |
|
|
if (searchPtr == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
while (1) { |
|
|
Var *varPtr2; |
|
|
|
|
|
hPtr = searchPtr->nextEntry; |
|
|
if (hPtr == NULL) { |
|
|
hPtr = Tcl_NextHashEntry(&searchPtr->search); |
|
|
if (hPtr == NULL) { |
|
|
return TCL_OK; |
|
|
} |
|
|
} else { |
|
|
searchPtr->nextEntry = NULL; |
|
|
} |
|
|
varPtr2 = (Var *) Tcl_GetHashValue(hPtr); |
|
|
if (!TclIsVarUndefined(varPtr2)) { |
|
|
break; |
|
|
} |
|
|
} |
|
|
Tcl_SetStringObj(resultPtr, |
|
|
Tcl_GetHashKey(varPtr->value.tablePtr, hPtr), -1); |
|
|
break; |
|
|
} |
|
|
case ARRAY_SET: { |
|
|
if (objc != 4) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "arrayName list"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
return(TclArraySet(interp, objv[2], objv[3])); |
|
|
} |
|
|
case ARRAY_SIZE: { |
|
|
Tcl_HashSearch search; |
|
|
Var *varPtr2; |
|
|
int size; |
|
|
|
|
|
if (objc != 3) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "arrayName"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
size = 0; |
|
|
if (!notArray) { |
|
|
for (hPtr = Tcl_FirstHashEntry(varPtr->value.tablePtr, |
|
|
&search); |
|
|
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { |
|
|
varPtr2 = (Var *) Tcl_GetHashValue(hPtr); |
|
|
if (TclIsVarUndefined(varPtr2)) { |
|
|
continue; |
|
|
} |
|
|
size++; |
|
|
} |
|
|
} |
|
|
Tcl_SetIntObj(resultPtr, size); |
|
|
break; |
|
|
} |
|
|
case ARRAY_STARTSEARCH: { |
|
|
ArraySearch *searchPtr; |
|
|
|
|
|
if (objc != 3) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "arrayName"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (notArray) { |
|
|
goto error; |
|
|
} |
|
|
searchPtr = (ArraySearch *) ckalloc(sizeof(ArraySearch)); |
|
|
if (varPtr->searchPtr == NULL) { |
|
|
searchPtr->id = 1; |
|
|
Tcl_AppendStringsToObj(resultPtr, "s-1-", varName, |
|
|
(char *) NULL); |
|
|
} else { |
|
|
char string[TCL_INTEGER_SPACE]; |
|
|
|
|
|
searchPtr->id = varPtr->searchPtr->id + 1; |
|
|
TclFormatInt(string, searchPtr->id); |
|
|
Tcl_AppendStringsToObj(resultPtr, "s-", string, "-", varName, |
|
|
(char *) NULL); |
|
|
} |
|
|
searchPtr->varPtr = varPtr; |
|
|
searchPtr->nextEntry = Tcl_FirstHashEntry(varPtr->value.tablePtr, |
|
|
&searchPtr->search); |
|
|
searchPtr->nextPtr = varPtr->searchPtr; |
|
|
varPtr->searchPtr = searchPtr; |
|
|
break; |
|
|
} |
|
|
case ARRAY_UNSET: { |
|
|
Tcl_HashSearch search; |
|
|
Var *varPtr2; |
|
|
char *pattern = NULL; |
|
|
char *name; |
|
|
|
|
|
if ((objc != 3) && (objc != 4)) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "arrayName ?pattern?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (notArray) { |
|
|
return TCL_OK; |
|
|
} |
|
|
if (objc == 3) { |
|
|
/* |
|
|
* When no pattern is given, just unset the whole array |
|
|
*/ |
|
|
if (Tcl_UnsetVar2(interp, varName, (char *) NULL, 0) |
|
|
!= TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} else { |
|
|
pattern = Tcl_GetString(objv[3]); |
|
|
for (hPtr = Tcl_FirstHashEntry(varPtr->value.tablePtr, |
|
|
&search); |
|
|
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { |
|
|
varPtr2 = (Var *) Tcl_GetHashValue(hPtr); |
|
|
if (TclIsVarUndefined(varPtr2)) { |
|
|
continue; |
|
|
} |
|
|
name = Tcl_GetHashKey(varPtr->value.tablePtr, hPtr); |
|
|
if (Tcl_StringMatch(name, pattern) && |
|
|
(Tcl_UnsetVar2(interp, varName, name, 0) |
|
|
!= TCL_OK)) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
} |
|
|
break; |
|
|
} |
|
|
} |
|
|
return TCL_OK; |
|
|
|
|
|
error: |
|
|
Tcl_AppendStringsToObj(resultPtr, "\"", varName, "\" isn't an array", |
|
|
(char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TclArraySet -- |
|
|
* |
|
|
* Set the elements of an array. If there are no elements to |
|
|
* set, create an empty array. This routine is used by the |
|
|
* Tcl_ArrayObjCmd and by the TclSetupEnv routine. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl result object. |
|
|
* |
|
|
* Side effects: |
|
|
* A variable will be created if one does not already exist. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
TclArraySet(interp, arrayNameObj, arrayElemObj) |
|
|
Tcl_Interp *interp; /* Current interpreter. */ |
|
|
Tcl_Obj *arrayNameObj; /* The array name. */ |
|
|
Tcl_Obj *arrayElemObj; /* The array elements list. If this is |
|
|
* NULL, create an empty array. */ |
|
|
{ |
|
|
Var *varPtr, *arrayPtr; |
|
|
Tcl_Obj **elemPtrs; |
|
|
int result, elemLen, i; |
|
|
char *varName, *p; |
|
|
|
|
|
varName = TclGetString(arrayNameObj); |
|
|
for (p = varName; *p ; p++) { |
|
|
if (*p == '(') { |
|
|
do { |
|
|
p++; |
|
|
} while (*p != '\0'); |
|
|
p--; |
|
|
if (*p == ')') { |
|
|
VarErrMsg(interp, varName, NULL, "set", needArray); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
break; |
|
|
} |
|
|
} |
|
|
|
|
|
varPtr = TclLookupVar(interp, varName, (char *) NULL, /*flags*/ 0, |
|
|
/*msg*/ 0, /*createPart1*/ 0, /*createPart2*/ 0, &arrayPtr); |
|
|
|
|
|
if (arrayElemObj != NULL) { |
|
|
result = Tcl_ListObjGetElements(interp, arrayElemObj, |
|
|
&elemLen, &elemPtrs); |
|
|
if (result != TCL_OK) { |
|
|
return result; |
|
|
} |
|
|
if (elemLen & 1) { |
|
|
Tcl_ResetResult(interp); |
|
|
Tcl_AppendToObj(Tcl_GetObjResult(interp), |
|
|
"list must have an even number of elements", -1); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (elemLen > 0) { |
|
|
for (i = 0; i < elemLen; i += 2) { |
|
|
if (Tcl_ObjSetVar2(interp, arrayNameObj, elemPtrs[i], |
|
|
elemPtrs[i+1], TCL_LEAVE_ERR_MSG) == NULL) { |
|
|
result = TCL_ERROR; |
|
|
break; |
|
|
} |
|
|
} |
|
|
return result; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* The list is empty make sure we have an array, or create |
|
|
* one if necessary. |
|
|
*/ |
|
|
|
|
|
if (varPtr != NULL) { |
|
|
if (!TclIsVarUndefined(varPtr) && TclIsVarArray(varPtr)) { |
|
|
/* |
|
|
* Already an array, done. |
|
|
*/ |
|
|
|
|
|
return TCL_OK; |
|
|
} |
|
|
if (TclIsVarArrayElement(varPtr) || !TclIsVarUndefined(varPtr)) { |
|
|
/* |
|
|
* Either an array element, or a scalar: lose! |
|
|
*/ |
|
|
|
|
|
VarErrMsg(interp, varName, (char *)NULL, "array set", needArray); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} else { |
|
|
/* |
|
|
* Create variable for new array. |
|
|
*/ |
|
|
|
|
|
varPtr = TclLookupVar(interp, varName, (char *) NULL, |
|
|
TCL_LEAVE_ERR_MSG, "set", |
|
|
/*createPart1*/ 1, /*createPart2*/ 0, &arrayPtr); |
|
|
|
|
|
/* |
|
|
* Still couldn't do it - this can occur if a non-existent |
|
|
* namespace was specified |
|
|
*/ |
|
|
if (varPtr == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
TclSetVarArray(varPtr); |
|
|
TclClearVarUndefined(varPtr); |
|
|
varPtr->value.tablePtr = |
|
|
(Tcl_HashTable *) ckalloc(sizeof(Tcl_HashTable)); |
|
|
Tcl_InitHashTable(varPtr->value.tablePtr, TCL_STRING_KEYS); |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* MakeUpvar -- |
|
|
* |
|
|
* This procedure does all of the work of the "global" and "upvar" |
|
|
* commands. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl completion code. If an error occurs then an |
|
|
* error message is left in iPtr->result. |
|
|
* |
|
|
* Side effects: |
|
|
* The variable given by myName is linked to the variable in framePtr |
|
|
* given by otherP1 and otherP2, so that references to myName are |
|
|
* redirected to the other variable like a symbolic link. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
MakeUpvar(iPtr, framePtr, otherP1, otherP2, otherFlags, myName, myFlags) |
|
|
Interp *iPtr; /* Interpreter containing variables. Used |
|
|
* for error messages, too. */ |
|
|
CallFrame *framePtr; /* Call frame containing "other" variable. |
|
|
* NULL means use global :: context. */ |
|
|
char *otherP1, *otherP2; /* Two-part name of variable in framePtr. */ |
|
|
int otherFlags; /* 0, TCL_GLOBAL_ONLY or TCL_NAMESPACE_ONLY: |
|
|
* indicates scope of "other" variable. */ |
|
|
char *myName; /* Name of variable which will refer to |
|
|
* otherP1/otherP2. Must be a scalar. */ |
|
|
int myFlags; /* 0, TCL_GLOBAL_ONLY or TCL_NAMESPACE_ONLY: |
|
|
* indicates scope of myName. */ |
|
|
{ |
|
|
Tcl_HashEntry *hPtr; |
|
|
Var *otherPtr, *varPtr, *arrayPtr; |
|
|
CallFrame *varFramePtr; |
|
|
CallFrame *savedFramePtr = NULL; /* Init. to avoid compiler warning. */ |
|
|
Tcl_HashTable *tablePtr; |
|
|
Namespace *nsPtr, *altNsPtr, *dummyNsPtr; |
|
|
char *tail; |
|
|
int new; |
|
|
|
|
|
/* |
|
|
* Find "other" in "framePtr". If not looking up other in just the |
|
|
* current namespace, temporarily replace the current var frame |
|
|
* pointer in the interpreter in order to use TclLookupVar. |
|
|
*/ |
|
|
|
|
|
if (!(otherFlags & TCL_NAMESPACE_ONLY)) { |
|
|
savedFramePtr = iPtr->varFramePtr; |
|
|
iPtr->varFramePtr = framePtr; |
|
|
} |
|
|
otherPtr = TclLookupVar((Tcl_Interp *) iPtr, otherP1, otherP2, |
|
|
(otherFlags | TCL_LEAVE_ERR_MSG), "access", |
|
|
/*createPart1*/ 1, /*createPart2*/ 1, &arrayPtr); |
|
|
if (!(otherFlags & TCL_NAMESPACE_ONLY)) { |
|
|
iPtr->varFramePtr = savedFramePtr; |
|
|
} |
|
|
if (otherPtr == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Now create a hashtable entry for "myName". Create it as either a |
|
|
* namespace variable or as a local variable in a procedure call |
|
|
* frame. Interpret myName as a namespace variable if: |
|
|
* 1) so requested by a TCL_GLOBAL_ONLY or TCL_NAMESPACE_ONLY flag, |
|
|
* 2) there is no active frame (we're at the global :: scope), |
|
|
* 3) the active frame was pushed to define the namespace context |
|
|
* for a "namespace eval" or "namespace inscope" command, |
|
|
* 4) the name has namespace qualifiers ("::"s). |
|
|
* If creating myName in the active procedure, look first in the |
|
|
* frame's array of compiler-allocated local variables, then in its |
|
|
* hashtable for runtime-created local variables. Create that |
|
|
* procedure's local variable hashtable if necessary. |
|
|
*/ |
|
|
|
|
|
varFramePtr = iPtr->varFramePtr; |
|
|
if ((myFlags & (TCL_GLOBAL_ONLY | TCL_NAMESPACE_ONLY)) |
|
|
|| (varFramePtr == NULL) |
|
|
|| !varFramePtr->isProcCallFrame |
|
|
|| (strstr(myName, "::") != NULL)) { |
|
|
TclGetNamespaceForQualName((Tcl_Interp *) iPtr, myName, |
|
|
(Namespace *) NULL, myFlags, &nsPtr, &altNsPtr, &dummyNsPtr, &tail); |
|
|
|
|
|
if (nsPtr == NULL) { |
|
|
nsPtr = altNsPtr; |
|
|
} |
|
|
if (nsPtr == NULL) { |
|
|
Tcl_AppendResult((Tcl_Interp *) iPtr, "bad variable name \"", |
|
|
myName, "\": unknown namespace", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Check that we are not trying to create a namespace var linked to |
|
|
* a local variable in a procedure. If we allowed this, the local |
|
|
* variable in the shorter-lived procedure frame could go away |
|
|
* leaving the namespace var's reference invalid. |
|
|
*/ |
|
|
|
|
|
if ((otherP2 ? arrayPtr->nsPtr : otherPtr->nsPtr) == NULL) { |
|
|
Tcl_AppendResult((Tcl_Interp *) iPtr, "bad variable name \"", |
|
|
myName, "\": upvar won't create namespace variable that refers to procedure variable", |
|
|
(char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
hPtr = Tcl_CreateHashEntry(&nsPtr->varTable, tail, &new); |
|
|
if (new) { |
|
|
varPtr = NewVar(); |
|
|
Tcl_SetHashValue(hPtr, varPtr); |
|
|
varPtr->hPtr = hPtr; |
|
|
varPtr->nsPtr = nsPtr; |
|
|
} else { |
|
|
varPtr = (Var *) Tcl_GetHashValue(hPtr); |
|
|
} |
|
|
} else { /* look in the call frame */ |
|
|
Proc *procPtr = varFramePtr->procPtr; |
|
|
int localCt = procPtr->numCompiledLocals; |
|
|
CompiledLocal *localPtr = procPtr->firstLocalPtr; |
|
|
Var *localVarPtr = varFramePtr->compiledLocals; |
|
|
int nameLen = strlen(myName); |
|
|
int i; |
|
|
|
|
|
varPtr = NULL; |
|
|
for (i = 0; i < localCt; i++) { |
|
|
if (!TclIsVarTemporary(localPtr)) { |
|
|
char *localName = localVarPtr->name; |
|
|
if ((myName[0] == localName[0]) |
|
|
&& (nameLen == localPtr->nameLength) |
|
|
&& (strcmp(myName, localName) == 0)) { |
|
|
varPtr = localVarPtr; |
|
|
new = 0; |
|
|
break; |
|
|
} |
|
|
} |
|
|
localVarPtr++; |
|
|
localPtr = localPtr->nextPtr; |
|
|
} |
|
|
if (varPtr == NULL) { /* look in frame's local var hashtable */ |
|
|
tablePtr = varFramePtr->varTablePtr; |
|
|
if (tablePtr == NULL) { |
|
|
tablePtr = (Tcl_HashTable *) ckalloc(sizeof(Tcl_HashTable)); |
|
|
Tcl_InitHashTable(tablePtr, TCL_STRING_KEYS); |
|
|
varFramePtr->varTablePtr = tablePtr; |
|
|
} |
|
|
hPtr = Tcl_CreateHashEntry(tablePtr, myName, &new); |
|
|
if (new) { |
|
|
varPtr = NewVar(); |
|
|
Tcl_SetHashValue(hPtr, varPtr); |
|
|
varPtr->hPtr = hPtr; |
|
|
varPtr->nsPtr = varFramePtr->nsPtr; |
|
|
} else { |
|
|
varPtr = (Var *) Tcl_GetHashValue(hPtr); |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
if (!new) { |
|
|
/* |
|
|
* The variable already exists. Make sure this variable "varPtr" |
|
|
* isn't the same as "otherPtr" (avoid circular links). Also, if |
|
|
* it's not an upvar then it's an error. If it is an upvar, then |
|
|
* just disconnect it from the thing it currently refers to. |
|
|
*/ |
|
|
|
|
|
if (varPtr == otherPtr) { |
|
|
Tcl_SetResult((Tcl_Interp *) iPtr, |
|
|
"can't upvar from variable to itself", TCL_STATIC); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (TclIsVarLink(varPtr)) { |
|
|
Var *linkPtr = varPtr->value.linkPtr; |
|
|
if (linkPtr == otherPtr) { |
|
|
return TCL_OK; |
|
|
} |
|
|
linkPtr->refCount--; |
|
|
if (TclIsVarUndefined(linkPtr)) { |
|
|
CleanupVar(linkPtr, (Var *) NULL); |
|
|
} |
|
|
} else if (!TclIsVarUndefined(varPtr)) { |
|
|
Tcl_AppendResult((Tcl_Interp *) iPtr, "variable \"", myName, |
|
|
"\" already exists", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} else if (varPtr->tracePtr != NULL) { |
|
|
Tcl_AppendResult((Tcl_Interp *) iPtr, "variable \"", myName, |
|
|
"\" has traces: can't use for upvar", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
TclSetVarLink(varPtr); |
|
|
TclClearVarUndefined(varPtr); |
|
|
varPtr->value.linkPtr = otherPtr; |
|
|
otherPtr->refCount++; |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_UpVar -- |
|
|
* |
|
|
* This procedure links one variable to another, just like |
|
|
* the "upvar" command. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl completion code. If an error occurs then |
|
|
* an error message is left in the interp's result. |
|
|
* |
|
|
* Side effects: |
|
|
* The variable in frameName whose name is given by varName becomes |
|
|
* accessible under the name localName, so that references to |
|
|
* localName are redirected to the other variable like a symbolic |
|
|
* link. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
Tcl_UpVar(interp, frameName, varName, localName, flags) |
|
|
Tcl_Interp *interp; /* Command interpreter in which varName is |
|
|
* to be looked up. */ |
|
|
char *frameName; /* Name of the frame containing the source |
|
|
* variable, such as "1" or "#0". */ |
|
|
char *varName; /* Name of a variable in interp to link to. |
|
|
* May be either a scalar name or an |
|
|
* element in an array. */ |
|
|
char *localName; /* Name of link variable. */ |
|
|
int flags; /* 0, TCL_GLOBAL_ONLY or TCL_NAMESPACE_ONLY: |
|
|
* indicates scope of localName. */ |
|
|
{ |
|
|
int result; |
|
|
CallFrame *framePtr; |
|
|
register char *p; |
|
|
|
|
|
result = TclGetFrame(interp, frameName, &framePtr); |
|
|
if (result == -1) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Figure out whether varName is an array reference, then call |
|
|
* MakeUpvar to do all the real work. |
|
|
*/ |
|
|
|
|
|
for (p = varName; *p != '\0'; p++) { |
|
|
if (*p == '(') { |
|
|
char *openParen = p; |
|
|
do { |
|
|
p++; |
|
|
} while (*p != '\0'); |
|
|
p--; |
|
|
if (*p != ')') { |
|
|
goto scalar; |
|
|
} |
|
|
*openParen = '\0'; |
|
|
*p = '\0'; |
|
|
result = MakeUpvar((Interp *) interp, framePtr, varName, |
|
|
openParen+1, 0, localName, flags); |
|
|
*openParen = '('; |
|
|
*p = ')'; |
|
|
return result; |
|
|
} |
|
|
} |
|
|
|
|
|
scalar: |
|
|
return MakeUpvar((Interp *) interp, framePtr, varName, (char *) NULL, |
|
|
0, localName, flags); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_UpVar2 -- |
|
|
* |
|
|
* This procedure links one variable to another, just like |
|
|
* the "upvar" command. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl completion code. If an error occurs then |
|
|
* an error message is left in the interp's result. |
|
|
* |
|
|
* Side effects: |
|
|
* The variable in frameName whose name is given by part1 and |
|
|
* part2 becomes accessible under the name localName, so that |
|
|
* references to localName are redirected to the other variable |
|
|
* like a symbolic link. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
Tcl_UpVar2(interp, frameName, part1, part2, localName, flags) |
|
|
Tcl_Interp *interp; /* Interpreter containing variables. Used |
|
|
* for error messages too. */ |
|
|
char *frameName; /* Name of the frame containing the source |
|
|
* variable, such as "1" or "#0". */ |
|
|
char *part1, *part2; /* Two parts of source variable name to |
|
|
* link to. */ |
|
|
char *localName; /* Name of link variable. */ |
|
|
int flags; /* 0, TCL_GLOBAL_ONLY or TCL_NAMESPACE_ONLY: |
|
|
* indicates scope of localName. */ |
|
|
{ |
|
|
int result; |
|
|
CallFrame *framePtr; |
|
|
|
|
|
result = TclGetFrame(interp, frameName, &framePtr); |
|
|
if (result == -1) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
return MakeUpvar((Interp *) interp, framePtr, part1, part2, 0, |
|
|
localName, flags); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_GetVariableFullName -- |
|
|
* |
|
|
* Given a Tcl_Var token returned by Tcl_FindNamespaceVar, this |
|
|
* procedure appends to an object the namespace variable's full |
|
|
* name, qualified by a sequence of parent namespace names. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The variable's fully-qualified name is appended to the string |
|
|
* representation of objPtr. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
Tcl_GetVariableFullName(interp, variable, objPtr) |
|
|
Tcl_Interp *interp; /* Interpreter containing the variable. */ |
|
|
Tcl_Var variable; /* Token for the variable returned by a |
|
|
* previous call to Tcl_FindNamespaceVar. */ |
|
|
Tcl_Obj *objPtr; /* Points to the object onto which the |
|
|
* variable's full name is appended. */ |
|
|
{ |
|
|
Interp *iPtr = (Interp *) interp; |
|
|
register Var *varPtr = (Var *) variable; |
|
|
char *name; |
|
|
|
|
|
/* |
|
|
* Add the full name of the containing namespace (if any), followed by |
|
|
* the "::" separator, then the variable name. |
|
|
*/ |
|
|
|
|
|
if (varPtr != NULL) { |
|
|
if (!TclIsVarArrayElement(varPtr)) { |
|
|
if (varPtr->nsPtr != NULL) { |
|
|
Tcl_AppendToObj(objPtr, varPtr->nsPtr->fullName, -1); |
|
|
if (varPtr->nsPtr != iPtr->globalNsPtr) { |
|
|
Tcl_AppendToObj(objPtr, "::", 2); |
|
|
} |
|
|
} |
|
|
if (varPtr->name != NULL) { |
|
|
Tcl_AppendToObj(objPtr, varPtr->name, -1); |
|
|
} else if (varPtr->hPtr != NULL) { |
|
|
name = Tcl_GetHashKey(varPtr->hPtr->tablePtr, varPtr->hPtr); |
|
|
Tcl_AppendToObj(objPtr, name, -1); |
|
|
} |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_GlobalObjCmd -- |
|
|
* |
|
|
* This object-based procedure is invoked to process the "global" Tcl |
|
|
* command. See the user documentation for details on what it does. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl object result value. |
|
|
* |
|
|
* Side effects: |
|
|
* See the user documentation. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
Tcl_GlobalObjCmd(dummy, interp, objc, objv) |
|
|
ClientData dummy; /* Not used. */ |
|
|
Tcl_Interp *interp; /* Current interpreter. */ |
|
|
int objc; /* Number of arguments. */ |
|
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
|
|
{ |
|
|
Interp *iPtr = (Interp *) interp; |
|
|
register Tcl_Obj *objPtr; |
|
|
char *varName; |
|
|
register char *tail; |
|
|
int result, i; |
|
|
|
|
|
if (objc < 2) { |
|
|
Tcl_WrongNumArgs(interp, 1, objv, "varName ?varName ...?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* If we are not executing inside a Tcl procedure, just return. |
|
|
*/ |
|
|
|
|
|
if ((iPtr->varFramePtr == NULL) |
|
|
|| !iPtr->varFramePtr->isProcCallFrame) { |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
for (i = 1; i < objc; i++) { |
|
|
/* |
|
|
* Make a local variable linked to its counterpart in the global :: |
|
|
* namespace. |
|
|
*/ |
|
|
|
|
|
objPtr = objv[i]; |
|
|
varName = TclGetString(objPtr); |
|
|
|
|
|
/* |
|
|
* The variable name might have a scope qualifier, but the name for |
|
|
* the local "link" variable must be the simple name at the tail. |
|
|
*/ |
|
|
|
|
|
for (tail = varName; *tail != '\0'; tail++) { |
|
|
/* empty body */ |
|
|
} |
|
|
while ((tail > varName) && ((*tail != ':') || (*(tail-1) != ':'))) { |
|
|
tail--; |
|
|
} |
|
|
if (*tail == ':') { |
|
|
tail++; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Link to the variable "varName" in the global :: namespace. |
|
|
*/ |
|
|
|
|
|
result = MakeUpvar(iPtr, (CallFrame *) NULL, |
|
|
varName, (char *) NULL, /*otherFlags*/ TCL_GLOBAL_ONLY, |
|
|
/*myName*/ tail, /*myFlags*/ 0); |
|
|
if (result != TCL_OK) { |
|
|
return result; |
|
|
} |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_VariableObjCmd -- |
|
|
* |
|
|
* Invoked to implement the "variable" command that creates one or more |
|
|
* global variables. Handles the following syntax: |
|
|
* |
|
|
* variable ?name value...? name ?value? |
|
|
* |
|
|
* One or more variables can be created. The variables are initialized |
|
|
* with the specified values. The value for the last variable is |
|
|
* optional. |
|
|
* |
|
|
* If the variable does not exist, it is created and given the optional |
|
|
* value. If it already exists, it is simply set to the optional |
|
|
* value. Normally, "name" is an unqualified name, so it is created in |
|
|
* the current namespace. If it includes namespace qualifiers, it can |
|
|
* be created in another namespace. |
|
|
* |
|
|
* If the variable command is executed inside a Tcl procedure, it |
|
|
* creates a local variable linked to the newly-created namespace |
|
|
* variable. |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if the variable is found or created. Returns |
|
|
* TCL_ERROR if anything goes wrong. |
|
|
* |
|
|
* Side effects: |
|
|
* If anything goes wrong, this procedure returns an error message |
|
|
* as the result in the interpreter's result object. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
Tcl_VariableObjCmd(dummy, interp, objc, objv) |
|
|
ClientData dummy; /* Not used. */ |
|
|
Tcl_Interp *interp; /* Current interpreter. */ |
|
|
int objc; /* Number of arguments. */ |
|
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
|
|
{ |
|
|
Interp *iPtr = (Interp *) interp; |
|
|
char *varName, *tail, *cp; |
|
|
Var *varPtr, *arrayPtr; |
|
|
Tcl_Obj *varValuePtr; |
|
|
int i, result; |
|
|
|
|
|
for (i = 1; i < objc; i = i+2) { |
|
|
/* |
|
|
* Look up each variable in the current namespace context, creating |
|
|
* it if necessary. |
|
|
*/ |
|
|
|
|
|
varName = TclGetString(objv[i]); |
|
|
varPtr = TclLookupVar(interp, varName, (char *) NULL, |
|
|
(TCL_NAMESPACE_ONLY | TCL_LEAVE_ERR_MSG), "define", |
|
|
/*createPart1*/ 1, /*createPart2*/ 0, &arrayPtr); |
|
|
|
|
|
if (arrayPtr != NULL) { |
|
|
/* |
|
|
* Variable cannot be an element in an array. If arrayPtr is |
|
|
* non-null, it is, so throw up an error and return. |
|
|
*/ |
|
|
VarErrMsg(interp, varName, NULL, "define", isArrayElement); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
if (varPtr == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Mark the variable as a namespace variable and increment its |
|
|
* reference count so that it will persist until its namespace is |
|
|
* destroyed or until the variable is unset. |
|
|
*/ |
|
|
|
|
|
if (!(varPtr->flags & VAR_NAMESPACE_VAR)) { |
|
|
varPtr->flags |= VAR_NAMESPACE_VAR; |
|
|
varPtr->refCount++; |
|
|
} |
|
|
|
|
|
/* |
|
|
* If a value was specified, set the variable to that value. |
|
|
* Otherwise, if the variable is new, leave it undefined. |
|
|
* (If the variable already exists and no value was specified, |
|
|
* leave its value unchanged; just create the local link if |
|
|
* we're in a Tcl procedure). |
|
|
*/ |
|
|
|
|
|
if (i+1 < objc) { /* a value was specified */ |
|
|
varValuePtr = Tcl_ObjSetVar2(interp, objv[i], NULL, objv[i+1], |
|
|
(TCL_NAMESPACE_ONLY | TCL_LEAVE_ERR_MSG)); |
|
|
if (varValuePtr == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* If we are executing inside a Tcl procedure, create a local |
|
|
* variable linked to the new namespace variable "varName". |
|
|
*/ |
|
|
|
|
|
if ((iPtr->varFramePtr != NULL) |
|
|
&& iPtr->varFramePtr->isProcCallFrame) { |
|
|
/* |
|
|
* varName might have a scope qualifier, but the name for the |
|
|
* local "link" variable must be the simple name at the tail. |
|
|
* |
|
|
* Locate tail in one pass: drop any prefix after two *or more* |
|
|
* consecutive ":" characters). |
|
|
*/ |
|
|
|
|
|
for (tail = cp = varName; *cp != '\0'; ) { |
|
|
if (*cp++ == ':') { |
|
|
while (*cp == ':') { |
|
|
tail = ++cp; |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Create a local link "tail" to the variable "varName" in the |
|
|
* current namespace. |
|
|
*/ |
|
|
|
|
|
result = MakeUpvar(iPtr, (CallFrame *) NULL, |
|
|
/*otherP1*/ varName, /*otherP2*/ (char *) NULL, |
|
|
/*otherFlags*/ TCL_NAMESPACE_ONLY, |
|
|
/*myName*/ tail, /*myFlags*/ 0); |
|
|
if (result != TCL_OK) { |
|
|
return result; |
|
|
} |
|
|
} |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_UpvarObjCmd -- |
|
|
* |
|
|
* This object-based procedure is invoked to process the "upvar" |
|
|
* Tcl command. See the user documentation for details on what it does. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl object result value. |
|
|
* |
|
|
* Side effects: |
|
|
* See the user documentation. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
/* ARGSUSED */ |
|
|
int |
|
|
Tcl_UpvarObjCmd(dummy, interp, objc, objv) |
|
|
ClientData dummy; /* Not used. */ |
|
|
Tcl_Interp *interp; /* Current interpreter. */ |
|
|
int objc; /* Number of arguments. */ |
|
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
|
|
{ |
|
|
register Interp *iPtr = (Interp *) interp; |
|
|
CallFrame *framePtr; |
|
|
char *frameSpec, *otherVarName, *myVarName; |
|
|
register char *p; |
|
|
int result; |
|
|
|
|
|
if (objc < 3) { |
|
|
upvarSyntax: |
|
|
Tcl_WrongNumArgs(interp, 1, objv, |
|
|
"?level? otherVar localVar ?otherVar localVar ...?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Find the call frame containing each of the "other variables" to be |
|
|
* linked to. |
|
|
*/ |
|
|
|
|
|
frameSpec = TclGetString(objv[1]); |
|
|
result = TclGetFrame(interp, frameSpec, &framePtr); |
|
|
if (result == -1) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
objc -= result+1; |
|
|
if ((objc & 1) != 0) { |
|
|
goto upvarSyntax; |
|
|
} |
|
|
objv += result+1; |
|
|
|
|
|
/* |
|
|
* Iterate over each (other variable, local variable) pair. |
|
|
* Divide the other variable name into two parts, then call |
|
|
* MakeUpvar to do all the work of linking it to the local variable. |
|
|
*/ |
|
|
|
|
|
for ( ; objc > 0; objc -= 2, objv += 2) { |
|
|
myVarName = TclGetString(objv[1]); |
|
|
otherVarName = TclGetString(objv[0]); |
|
|
for (p = otherVarName; *p != 0; p++) { |
|
|
if (*p == '(') { |
|
|
char *openParen = p; |
|
|
|
|
|
do { |
|
|
p++; |
|
|
} while (*p != '\0'); |
|
|
p--; |
|
|
if (*p != ')') { |
|
|
goto scalar; |
|
|
} |
|
|
*openParen = '\0'; |
|
|
*p = '\0'; |
|
|
result = MakeUpvar(iPtr, framePtr, |
|
|
otherVarName, openParen+1, /*otherFlags*/ 0, |
|
|
myVarName, /*flags*/ 0); |
|
|
*openParen = '('; |
|
|
*p = ')'; |
|
|
goto checkResult; |
|
|
} |
|
|
} |
|
|
scalar: |
|
|
result = MakeUpvar(iPtr, framePtr, otherVarName, (char *) NULL, 0, |
|
|
myVarName, /*flags*/ 0); |
|
|
|
|
|
checkResult: |
|
|
if (result != TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* CallTraces -- |
|
|
* |
|
|
* This procedure is invoked to find and invoke relevant |
|
|
* trace procedures associated with a particular operation on |
|
|
* a variable. This procedure invokes traces both on the |
|
|
* variable and on its containing array (where relevant). |
|
|
* |
|
|
* Results: |
|
|
* The return value is NULL if no trace procedures were invoked, or |
|
|
* if all the invoked trace procedures returned successfully. |
|
|
* The return value is non-NULL if a trace procedure returned an |
|
|
* error (in this case no more trace procedures were invoked after |
|
|
* the error was returned). In this case the return value is a |
|
|
* pointer to a static string describing the error. |
|
|
* |
|
|
* Side effects: |
|
|
* Almost anything can happen, depending on trace; this procedure |
|
|
* itself doesn't have any side effects. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static char * |
|
|
CallTraces(iPtr, arrayPtr, varPtr, part1, part2, flags) |
|
|
Interp *iPtr; /* Interpreter containing variable. */ |
|
|
register Var *arrayPtr; /* Pointer to array variable that contains |
|
|
* the variable, or NULL if the variable |
|
|
* isn't an element of an array. */ |
|
|
Var *varPtr; /* Variable whose traces are to be |
|
|
* invoked. */ |
|
|
char *part1, *part2; /* Variable's two-part name. */ |
|
|
int flags; /* Flags passed to trace procedures: |
|
|
* indicates what's happening to variable, |
|
|
* plus other stuff like TCL_GLOBAL_ONLY, |
|
|
* TCL_NAMESPACE_ONLY, and |
|
|
* TCL_INTERP_DESTROYED. */ |
|
|
{ |
|
|
register VarTrace *tracePtr; |
|
|
ActiveVarTrace active; |
|
|
char *result, *openParen, *p; |
|
|
Tcl_DString nameCopy; |
|
|
int copiedName; |
|
|
|
|
|
/* |
|
|
* If there are already similar trace procedures active for the |
|
|
* variable, don't call them again. |
|
|
*/ |
|
|
|
|
|
if (varPtr->flags & VAR_TRACE_ACTIVE) { |
|
|
return NULL; |
|
|
} |
|
|
varPtr->flags |= VAR_TRACE_ACTIVE; |
|
|
varPtr->refCount++; |
|
|
|
|
|
/* |
|
|
* If the variable name hasn't been parsed into array name and |
|
|
* element, do it here. If there really is an array element, |
|
|
* make a copy of the original name so that NULLs can be |
|
|
* inserted into it to separate the names (can't modify the name |
|
|
* string in place, because the string might get used by the |
|
|
* callbacks we invoke). |
|
|
*/ |
|
|
|
|
|
copiedName = 0; |
|
|
if (part2 == NULL) { |
|
|
for (p = part1; *p ; p++) { |
|
|
if (*p == '(') { |
|
|
openParen = p; |
|
|
do { |
|
|
p++; |
|
|
} while (*p != '\0'); |
|
|
p--; |
|
|
if (*p == ')') { |
|
|
Tcl_DStringInit(&nameCopy); |
|
|
Tcl_DStringAppend(&nameCopy, part1, (p-part1)); |
|
|
part2 = Tcl_DStringValue(&nameCopy) |
|
|
+ (openParen + 1 - part1); |
|
|
part2[-1] = 0; |
|
|
part1 = Tcl_DStringValue(&nameCopy); |
|
|
copiedName = 1; |
|
|
} |
|
|
break; |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Invoke traces on the array containing the variable, if relevant. |
|
|
*/ |
|
|
|
|
|
result = NULL; |
|
|
active.nextPtr = iPtr->activeTracePtr; |
|
|
iPtr->activeTracePtr = &active; |
|
|
if (arrayPtr != NULL) { |
|
|
arrayPtr->refCount++; |
|
|
active.varPtr = arrayPtr; |
|
|
for (tracePtr = arrayPtr->tracePtr; tracePtr != NULL; |
|
|
tracePtr = active.nextTracePtr) { |
|
|
active.nextTracePtr = tracePtr->nextPtr; |
|
|
if (!(tracePtr->flags & flags)) { |
|
|
continue; |
|
|
} |
|
|
result = (*tracePtr->traceProc)(tracePtr->clientData, |
|
|
(Tcl_Interp *) iPtr, part1, part2, flags); |
|
|
if (result != NULL) { |
|
|
if (flags & TCL_TRACE_UNSETS) { |
|
|
result = NULL; |
|
|
} else { |
|
|
goto done; |
|
|
} |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Invoke traces on the variable itself. |
|
|
*/ |
|
|
|
|
|
if (flags & TCL_TRACE_UNSETS) { |
|
|
flags |= TCL_TRACE_DESTROYED; |
|
|
} |
|
|
active.varPtr = varPtr; |
|
|
for (tracePtr = varPtr->tracePtr; tracePtr != NULL; |
|
|
tracePtr = active.nextTracePtr) { |
|
|
active.nextTracePtr = tracePtr->nextPtr; |
|
|
if (!(tracePtr->flags & flags)) { |
|
|
continue; |
|
|
} |
|
|
result = (*tracePtr->traceProc)(tracePtr->clientData, |
|
|
(Tcl_Interp *) iPtr, part1, part2, flags); |
|
|
if (result != NULL) { |
|
|
if (flags & TCL_TRACE_UNSETS) { |
|
|
result = NULL; |
|
|
} else { |
|
|
goto done; |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Restore the variable's flags, remove the record of our active |
|
|
* traces, and then return. |
|
|
*/ |
|
|
|
|
|
done: |
|
|
if (arrayPtr != NULL) { |
|
|
arrayPtr->refCount--; |
|
|
} |
|
|
if (copiedName) { |
|
|
Tcl_DStringFree(&nameCopy); |
|
|
} |
|
|
varPtr->flags &= ~VAR_TRACE_ACTIVE; |
|
|
varPtr->refCount--; |
|
|
iPtr->activeTracePtr = active.nextPtr; |
|
|
return result; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* NewVar -- |
|
|
* |
|
|
* Create a new heap-allocated variable that will eventually be |
|
|
* entered into a hashtable. |
|
|
* |
|
|
* Results: |
|
|
* The return value is a pointer to the new variable structure. It is |
|
|
* marked as a scalar variable (and not a link or array variable). Its |
|
|
* value initially is NULL. The variable is not part of any hash table |
|
|
* yet. Since it will be in a hashtable and not in a call frame, its |
|
|
* name field is set NULL. It is initially marked as undefined. |
|
|
* |
|
|
* Side effects: |
|
|
* Storage gets allocated. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static Var * |
|
|
NewVar() |
|
|
{ |
|
|
register Var *varPtr; |
|
|
|
|
|
varPtr = (Var *) ckalloc(sizeof(Var)); |
|
|
varPtr->value.objPtr = NULL; |
|
|
varPtr->name = NULL; |
|
|
varPtr->nsPtr = NULL; |
|
|
varPtr->hPtr = NULL; |
|
|
varPtr->refCount = 0; |
|
|
varPtr->tracePtr = NULL; |
|
|
varPtr->searchPtr = NULL; |
|
|
varPtr->flags = (VAR_SCALAR | VAR_UNDEFINED | VAR_IN_HASHTABLE); |
|
|
return varPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* ParseSearchId -- |
|
|
* |
|
|
* This procedure translates from a string to a pointer to an |
|
|
* active array search (if there is one that matches the string). |
|
|
* |
|
|
* Results: |
|
|
* The return value is a pointer to the array search indicated |
|
|
* by string, or NULL if there isn't one. If NULL is returned, |
|
|
* the interp's result contains an error message. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static ArraySearch * |
|
|
ParseSearchId(interp, varPtr, varName, string) |
|
|
Tcl_Interp *interp; /* Interpreter containing variable. */ |
|
|
Var *varPtr; /* Array variable search is for. */ |
|
|
char *varName; /* Name of array variable that search is |
|
|
* supposed to be for. */ |
|
|
char *string; /* String containing id of search. Must have |
|
|
* form "search-num-var" where "num" is a |
|
|
* decimal number and "var" is a variable |
|
|
* name. */ |
|
|
{ |
|
|
char *end; |
|
|
int id; |
|
|
ArraySearch *searchPtr; |
|
|
|
|
|
/* |
|
|
* Parse the id into the three parts separated by dashes. |
|
|
*/ |
|
|
|
|
|
if ((string[0] != 's') || (string[1] != '-')) { |
|
|
syntax: |
|
|
Tcl_AppendResult(interp, "illegal search identifier \"", string, |
|
|
"\"", (char *) NULL); |
|
|
return NULL; |
|
|
} |
|
|
id = strtoul(string+2, &end, 10); |
|
|
if ((end == (string+2)) || (*end != '-')) { |
|
|
goto syntax; |
|
|
} |
|
|
if (strcmp(end+1, varName) != 0) { |
|
|
Tcl_AppendResult(interp, "search identifier \"", string, |
|
|
"\" isn't for variable \"", varName, "\"", (char *) NULL); |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Search through the list of active searches on the interpreter |
|
|
* to see if the desired one exists. |
|
|
*/ |
|
|
|
|
|
for (searchPtr = varPtr->searchPtr; searchPtr != NULL; |
|
|
searchPtr = searchPtr->nextPtr) { |
|
|
if (searchPtr->id == id) { |
|
|
return searchPtr; |
|
|
} |
|
|
} |
|
|
Tcl_AppendResult(interp, "couldn't find search \"", string, "\"", |
|
|
(char *) NULL); |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* DeleteSearches -- |
|
|
* |
|
|
* This procedure is called to free up all of the searches |
|
|
* associated with an array variable. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Memory is released to the storage allocator. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
DeleteSearches(arrayVarPtr) |
|
|
register Var *arrayVarPtr; /* Variable whose searches are |
|
|
* to be deleted. */ |
|
|
{ |
|
|
ArraySearch *searchPtr; |
|
|
|
|
|
while (arrayVarPtr->searchPtr != NULL) { |
|
|
searchPtr = arrayVarPtr->searchPtr; |
|
|
arrayVarPtr->searchPtr = searchPtr->nextPtr; |
|
|
ckfree((char *) searchPtr); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TclDeleteVars -- |
|
|
* |
|
|
* This procedure is called to recycle all the storage space |
|
|
* associated with a table of variables. For this procedure |
|
|
* to work correctly, it must not be possible for any of the |
|
|
* variables in the table to be accessed from Tcl commands |
|
|
* (e.g. from trace procedures). |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Variables are deleted and trace procedures are invoked, if |
|
|
* any are declared. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
TclDeleteVars(iPtr, tablePtr) |
|
|
Interp *iPtr; /* Interpreter to which variables belong. */ |
|
|
Tcl_HashTable *tablePtr; /* Hash table containing variables to |
|
|
* delete. */ |
|
|
{ |
|
|
Tcl_Interp *interp = (Tcl_Interp *) iPtr; |
|
|
Tcl_HashSearch search; |
|
|
Tcl_HashEntry *hPtr; |
|
|
register Var *varPtr; |
|
|
Var *linkPtr; |
|
|
int flags; |
|
|
ActiveVarTrace *activePtr; |
|
|
Tcl_Obj *objPtr; |
|
|
Namespace *currNsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
|
|
|
|
|
/* |
|
|
* Determine what flags to pass to the trace callback procedures. |
|
|
*/ |
|
|
|
|
|
flags = TCL_TRACE_UNSETS; |
|
|
if (tablePtr == &iPtr->globalNsPtr->varTable) { |
|
|
flags |= (TCL_INTERP_DESTROYED | TCL_GLOBAL_ONLY); |
|
|
} else if (tablePtr == &currNsPtr->varTable) { |
|
|
flags |= TCL_NAMESPACE_ONLY; |
|
|
} |
|
|
|
|
|
for (hPtr = Tcl_FirstHashEntry(tablePtr, &search); hPtr != NULL; |
|
|
hPtr = Tcl_NextHashEntry(&search)) { |
|
|
varPtr = (Var *) Tcl_GetHashValue(hPtr); |
|
|
|
|
|
/* |
|
|
* For global/upvar variables referenced in procedures, decrement |
|
|
* the reference count on the variable referred to, and free |
|
|
* the referenced variable if it's no longer needed. Don't delete |
|
|
* the hash entry for the other variable if it's in the same table |
|
|
* as us: this will happen automatically later on. |
|
|
*/ |
|
|
|
|
|
if (TclIsVarLink(varPtr)) { |
|
|
linkPtr = varPtr->value.linkPtr; |
|
|
linkPtr->refCount--; |
|
|
if ((linkPtr->refCount == 0) && TclIsVarUndefined(linkPtr) |
|
|
&& (linkPtr->tracePtr == NULL) |
|
|
&& (linkPtr->flags & VAR_IN_HASHTABLE)) { |
|
|
if (linkPtr->hPtr == NULL) { |
|
|
ckfree((char *) linkPtr); |
|
|
} else if (linkPtr->hPtr->tablePtr != tablePtr) { |
|
|
Tcl_DeleteHashEntry(linkPtr->hPtr); |
|
|
ckfree((char *) linkPtr); |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Invoke traces on the variable that is being deleted, then |
|
|
* free up the variable's space (no need to free the hash entry |
|
|
* here, unless we're dealing with a global variable: the |
|
|
* hash entries will be deleted automatically when the whole |
|
|
* table is deleted). Note that we give CallTraces the variable's |
|
|
* fully-qualified name so that any called trace procedures can |
|
|
* refer to these variables being deleted. |
|
|
*/ |
|
|
|
|
|
if (varPtr->tracePtr != NULL) { |
|
|
objPtr = Tcl_NewObj(); |
|
|
Tcl_IncrRefCount(objPtr); /* until done with traces */ |
|
|
Tcl_GetVariableFullName(interp, (Tcl_Var) varPtr, objPtr); |
|
|
(void) CallTraces(iPtr, (Var *) NULL, varPtr, |
|
|
Tcl_GetString(objPtr), (char *) NULL, flags); |
|
|
Tcl_DecrRefCount(objPtr); /* free no longer needed obj */ |
|
|
|
|
|
while (varPtr->tracePtr != NULL) { |
|
|
VarTrace *tracePtr = varPtr->tracePtr; |
|
|
varPtr->tracePtr = tracePtr->nextPtr; |
|
|
ckfree((char *) tracePtr); |
|
|
} |
|
|
for (activePtr = iPtr->activeTracePtr; activePtr != NULL; |
|
|
activePtr = activePtr->nextPtr) { |
|
|
if (activePtr->varPtr == varPtr) { |
|
|
activePtr->nextTracePtr = NULL; |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
if (TclIsVarArray(varPtr)) { |
|
|
DeleteArray(iPtr, Tcl_GetHashKey(tablePtr, hPtr), varPtr, |
|
|
flags); |
|
|
varPtr->value.tablePtr = NULL; |
|
|
} |
|
|
if (TclIsVarScalar(varPtr) && (varPtr->value.objPtr != NULL)) { |
|
|
objPtr = varPtr->value.objPtr; |
|
|
TclDecrRefCount(objPtr); |
|
|
varPtr->value.objPtr = NULL; |
|
|
} |
|
|
varPtr->hPtr = NULL; |
|
|
varPtr->tracePtr = NULL; |
|
|
TclSetVarUndefined(varPtr); |
|
|
TclSetVarScalar(varPtr); |
|
|
|
|
|
/* |
|
|
* If the variable was a namespace variable, decrement its |
|
|
* reference count. We are in the process of destroying its |
|
|
* namespace so that namespace will no longer "refer" to the |
|
|
* variable. |
|
|
*/ |
|
|
|
|
|
if (varPtr->flags & VAR_NAMESPACE_VAR) { |
|
|
varPtr->flags &= ~VAR_NAMESPACE_VAR; |
|
|
varPtr->refCount--; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Recycle the variable's memory space if there aren't any upvar's |
|
|
* pointing to it. If there are upvars to this variable, then the |
|
|
* variable will get freed when the last upvar goes away. |
|
|
*/ |
|
|
|
|
|
if (varPtr->refCount == 0) { |
|
|
ckfree((char *) varPtr); /* this Var must be VAR_IN_HASHTABLE */ |
|
|
} |
|
|
} |
|
|
Tcl_DeleteHashTable(tablePtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TclDeleteCompiledLocalVars -- |
|
|
* |
|
|
* This procedure is called to recycle storage space associated with |
|
|
* the compiler-allocated array of local variables in a procedure call |
|
|
* frame. This procedure resembles TclDeleteVars above except that each |
|
|
* variable is stored in a call frame and not a hash table. For this |
|
|
* procedure to work correctly, it must not be possible for any of the |
|
|
* variable in the table to be accessed from Tcl commands (e.g. from |
|
|
* trace procedures). |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Variables are deleted and trace procedures are invoked, if |
|
|
* any are declared. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
TclDeleteCompiledLocalVars(iPtr, framePtr) |
|
|
Interp *iPtr; /* Interpreter to which variables belong. */ |
|
|
CallFrame *framePtr; /* Procedure call frame containing |
|
|
* compiler-assigned local variables to |
|
|
* delete. */ |
|
|
{ |
|
|
register Var *varPtr; |
|
|
int flags; /* Flags passed to trace procedures. */ |
|
|
Var *linkPtr; |
|
|
ActiveVarTrace *activePtr; |
|
|
int numLocals, i; |
|
|
|
|
|
flags = TCL_TRACE_UNSETS; |
|
|
numLocals = framePtr->numCompiledLocals; |
|
|
varPtr = framePtr->compiledLocals; |
|
|
for (i = 0; i < numLocals; i++) { |
|
|
/* |
|
|
* For global/upvar variables referenced in procedures, decrement |
|
|
* the reference count on the variable referred to, and free |
|
|
* the referenced variable if it's no longer needed. Don't delete |
|
|
* the hash entry for the other variable if it's in the same table |
|
|
* as us: this will happen automatically later on. |
|
|
*/ |
|
|
|
|
|
if (TclIsVarLink(varPtr)) { |
|
|
linkPtr = varPtr->value.linkPtr; |
|
|
linkPtr->refCount--; |
|
|
if ((linkPtr->refCount == 0) && TclIsVarUndefined(linkPtr) |
|
|
&& (linkPtr->tracePtr == NULL) |
|
|
&& (linkPtr->flags & VAR_IN_HASHTABLE)) { |
|
|
if (linkPtr->hPtr == NULL) { |
|
|
ckfree((char *) linkPtr); |
|
|
} else { |
|
|
Tcl_DeleteHashEntry(linkPtr->hPtr); |
|
|
ckfree((char *) linkPtr); |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Invoke traces on the variable that is being deleted. Then delete |
|
|
* the variable's trace records. |
|
|
*/ |
|
|
|
|
|
if (varPtr->tracePtr != NULL) { |
|
|
(void) CallTraces(iPtr, (Var *) NULL, varPtr, |
|
|
varPtr->name, (char *) NULL, flags); |
|
|
while (varPtr->tracePtr != NULL) { |
|
|
VarTrace *tracePtr = varPtr->tracePtr; |
|
|
varPtr->tracePtr = tracePtr->nextPtr; |
|
|
ckfree((char *) tracePtr); |
|
|
} |
|
|
for (activePtr = iPtr->activeTracePtr; activePtr != NULL; |
|
|
activePtr = activePtr->nextPtr) { |
|
|
if (activePtr->varPtr == varPtr) { |
|
|
activePtr->nextTracePtr = NULL; |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Now if the variable is an array, delete its element hash table. |
|
|
* Otherwise, if it's a scalar variable, decrement the ref count |
|
|
* of its value. |
|
|
*/ |
|
|
|
|
|
if (TclIsVarArray(varPtr) && (varPtr->value.tablePtr != NULL)) { |
|
|
DeleteArray(iPtr, varPtr->name, varPtr, flags); |
|
|
} |
|
|
if (TclIsVarScalar(varPtr) && (varPtr->value.objPtr != NULL)) { |
|
|
TclDecrRefCount(varPtr->value.objPtr); |
|
|
varPtr->value.objPtr = NULL; |
|
|
} |
|
|
varPtr->hPtr = NULL; |
|
|
varPtr->tracePtr = NULL; |
|
|
TclSetVarUndefined(varPtr); |
|
|
TclSetVarScalar(varPtr); |
|
|
varPtr++; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* DeleteArray -- |
|
|
* |
|
|
* This procedure is called to free up everything in an array |
|
|
* variable. It's the caller's responsibility to make sure |
|
|
* that the array is no longer accessible before this procedure |
|
|
* is called. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* All storage associated with varPtr's array elements is deleted |
|
|
* (including the array's hash table). Deletion trace procedures for |
|
|
* array elements are invoked, then deleted. Any pending traces for |
|
|
* array elements are also deleted. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
DeleteArray(iPtr, arrayName, varPtr, flags) |
|
|
Interp *iPtr; /* Interpreter containing array. */ |
|
|
char *arrayName; /* Name of array (used for trace |
|
|
* callbacks). */ |
|
|
Var *varPtr; /* Pointer to variable structure. */ |
|
|
int flags; /* Flags to pass to CallTraces: |
|
|
* TCL_TRACE_UNSETS and sometimes |
|
|
* TCL_INTERP_DESTROYED, |
|
|
* TCL_NAMESPACE_ONLY, or |
|
|
* TCL_GLOBAL_ONLY. */ |
|
|
{ |
|
|
Tcl_HashSearch search; |
|
|
register Tcl_HashEntry *hPtr; |
|
|
register Var *elPtr; |
|
|
ActiveVarTrace *activePtr; |
|
|
Tcl_Obj *objPtr; |
|
|
|
|
|
DeleteSearches(varPtr); |
|
|
for (hPtr = Tcl_FirstHashEntry(varPtr->value.tablePtr, &search); |
|
|
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { |
|
|
elPtr = (Var *) Tcl_GetHashValue(hPtr); |
|
|
if (TclIsVarScalar(elPtr) && (elPtr->value.objPtr != NULL)) { |
|
|
objPtr = elPtr->value.objPtr; |
|
|
TclDecrRefCount(objPtr); |
|
|
elPtr->value.objPtr = NULL; |
|
|
} |
|
|
elPtr->hPtr = NULL; |
|
|
if (elPtr->tracePtr != NULL) { |
|
|
elPtr->flags &= ~VAR_TRACE_ACTIVE; |
|
|
(void) CallTraces(iPtr, (Var *) NULL, elPtr, arrayName, |
|
|
Tcl_GetHashKey(varPtr->value.tablePtr, hPtr), flags); |
|
|
while (elPtr->tracePtr != NULL) { |
|
|
VarTrace *tracePtr = elPtr->tracePtr; |
|
|
elPtr->tracePtr = tracePtr->nextPtr; |
|
|
ckfree((char *) tracePtr); |
|
|
} |
|
|
for (activePtr = iPtr->activeTracePtr; activePtr != NULL; |
|
|
activePtr = activePtr->nextPtr) { |
|
|
if (activePtr->varPtr == elPtr) { |
|
|
activePtr->nextTracePtr = NULL; |
|
|
} |
|
|
} |
|
|
} |
|
|
TclSetVarUndefined(elPtr); |
|
|
TclSetVarScalar(elPtr); |
|
|
if (elPtr->refCount == 0) { |
|
|
ckfree((char *) elPtr); /* element Vars are VAR_IN_HASHTABLE */ |
|
|
} |
|
|
} |
|
|
Tcl_DeleteHashTable(varPtr->value.tablePtr); |
|
|
ckfree((char *) varPtr->value.tablePtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* CleanupVar -- |
|
|
* |
|
|
* This procedure is called when it looks like it may be OK to free up |
|
|
* a variable's storage. If the variable is in a hashtable, its Var |
|
|
* structure and hash table entry will be freed along with those of its |
|
|
* containing array, if any. This procedure is called, for example, |
|
|
* when a trace on a variable deletes a variable. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* If the variable (or its containing array) really is dead and in a |
|
|
* hashtable, then its Var structure, and possibly its hash table |
|
|
* entry, is freed up. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
CleanupVar(varPtr, arrayPtr) |
|
|
Var *varPtr; /* Pointer to variable that may be a |
|
|
* candidate for being expunged. */ |
|
|
Var *arrayPtr; /* Array that contains the variable, or |
|
|
* NULL if this variable isn't an array |
|
|
* element. */ |
|
|
{ |
|
|
if (TclIsVarUndefined(varPtr) && (varPtr->refCount == 0) |
|
|
&& (varPtr->tracePtr == NULL) |
|
|
&& (varPtr->flags & VAR_IN_HASHTABLE)) { |
|
|
if (varPtr->hPtr != NULL) { |
|
|
Tcl_DeleteHashEntry(varPtr->hPtr); |
|
|
} |
|
|
ckfree((char *) varPtr); |
|
|
} |
|
|
if (arrayPtr != NULL) { |
|
|
if (TclIsVarUndefined(arrayPtr) && (arrayPtr->refCount == 0) |
|
|
&& (arrayPtr->tracePtr == NULL) |
|
|
&& (arrayPtr->flags & VAR_IN_HASHTABLE)) { |
|
|
if (arrayPtr->hPtr != NULL) { |
|
|
Tcl_DeleteHashEntry(arrayPtr->hPtr); |
|
|
} |
|
|
ckfree((char *) arrayPtr); |
|
|
} |
|
|
} |
|
|
} |
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* VarErrMsg -- |
|
|
* |
|
|
* Generate a reasonable error message describing why a variable |
|
|
* operation failed. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The interp's result is set to hold a message identifying the |
|
|
* variable given by part1 and part2 and describing why the |
|
|
* variable operation failed. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
VarErrMsg(interp, part1, part2, operation, reason) |
|
|
Tcl_Interp *interp; /* Interpreter in which to record message. */ |
|
|
char *part1, *part2; /* Variable's two-part name. */ |
|
|
char *operation; /* String describing operation that failed, |
|
|
* e.g. "read", "set", or "unset". */ |
|
|
char *reason; /* String describing why operation failed. */ |
|
|
{ |
|
|
Tcl_ResetResult(interp); |
|
|
Tcl_AppendResult(interp, "can't ", operation, " \"", part1, |
|
|
(char *) NULL); |
|
|
if (part2 != NULL) { |
|
|
Tcl_AppendResult(interp, "(", part2, ")", (char *) NULL); |
|
|
} |
|
|
Tcl_AppendResult(interp, "\": ", reason, (char *) NULL); |
|
|
} |
|
|
|
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TclTraceVarExists -- |
|
|
* |
|
|
* This is called from info exists. We need to trigger read |
|
|
* and/or array traces because they may end up creating a |
|
|
* variable that doesn't currently exist. |
|
|
* |
|
|
* Results: |
|
|
* A pointer to the Var structure, or NULL. |
|
|
* |
|
|
* Side effects: |
|
|
* May fill in error messages in the interp. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
Var * |
|
|
TclVarTraceExists(interp, varName) |
|
|
Tcl_Interp *interp; /* The interpreter */ |
|
|
char *varName; /* The variable name */ |
|
|
{ |
|
|
Var *varPtr; |
|
|
Var *arrayPtr; |
|
|
char *msg; |
|
|
|
|
|
/* |
|
|
* The choice of "create" flag values is delicate here, and |
|
|
* matches the semantics of GetVar. Things are still not perfect, |
|
|
* however, because if you do "info exists x" you get a varPtr |
|
|
* and therefore trigger traces. However, if you do |
|
|
* "info exists x(i)", then you only get a varPtr if x is already |
|
|
* known to be an array. Otherwise you get NULL, and no trace |
|
|
* is triggered. This matches Tcl 7.6 semantics. |
|
|
*/ |
|
|
|
|
|
varPtr = TclLookupVar(interp, varName, (char *) NULL, |
|
|
0, "access", |
|
|
/*createPart1*/ 0, /*createPart2*/ 1, &arrayPtr); |
|
|
if (varPtr == NULL) { |
|
|
return NULL; |
|
|
} |
|
|
if ((varPtr != NULL) && |
|
|
((varPtr->tracePtr != NULL) |
|
|
|| ((arrayPtr != NULL) && (arrayPtr->tracePtr != NULL)))) { |
|
|
msg = CallTraces((Interp *)interp, arrayPtr, varPtr, varName, |
|
|
(char *) NULL, TCL_TRACE_READS); |
|
|
if (msg != NULL) { |
|
|
/* |
|
|
* If the variable doesn't exist anymore and no-one's using |
|
|
* it, then free up the relevant structures and hash table entries. |
|
|
*/ |
|
|
|
|
|
if (TclIsVarUndefined(varPtr)) { |
|
|
CleanupVar(varPtr, arrayPtr); |
|
|
} |
|
|
return NULL; |
|
|
} |
|
|
} |
|
|
return varPtr; |
|
|
} |
|
|
|
|
|
|
|
|
/* $History: tclvar.c $ |
|
|
* |
|
|
* ***************** Version 1 ***************** |
|
|
* User: Dtashley Date: 1/02/01 Time: 12:52a |
|
|
* Created in $/IjuScripter, IjuConsole/Source/Tcl Base |
|
|
* Initial check-in. |
|
|
*/ |
|
|
|
|
|
/* End of TCLVAR.C */ |
|
| 1 |
|
/* $Header$ */ |
| 2 |
|
/* |
| 3 |
|
* tclVar.c -- |
| 4 |
|
* |
| 5 |
|
* This file contains routines that implement Tcl variables |
| 6 |
|
* (both scalars and arrays). |
| 7 |
|
* |
| 8 |
|
* The implementation of arrays is modelled after an initial |
| 9 |
|
* implementation by Mark Diekhans and Karl Lehenbauer. |
| 10 |
|
* |
| 11 |
|
* Copyright (c) 1987-1994 The Regents of the University of California. |
| 12 |
|
* Copyright (c) 1994-1997 Sun Microsystems, Inc. |
| 13 |
|
* Copyright (c) 1998-1999 by Scriptics Corporation. |
| 14 |
|
* |
| 15 |
|
* See the file "license.terms" for information on usage and redistribution |
| 16 |
|
* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| 17 |
|
* |
| 18 |
|
* RCS: @(#) $Id: tclvar.c,v 1.1.1.1 2001/06/13 04:48:07 dtashley Exp $ |
| 19 |
|
*/ |
| 20 |
|
|
| 21 |
|
#include "tclInt.h" |
| 22 |
|
#include "tclPort.h" |
| 23 |
|
|
| 24 |
|
/* |
| 25 |
|
* The strings below are used to indicate what went wrong when a |
| 26 |
|
* variable access is denied. |
| 27 |
|
*/ |
| 28 |
|
|
| 29 |
|
static char *noSuchVar = "no such variable"; |
| 30 |
|
static char *isArray = "variable is array"; |
| 31 |
|
static char *needArray = "variable isn't array"; |
| 32 |
|
static char *noSuchElement = "no such element in array"; |
| 33 |
|
static char *danglingElement = "upvar refers to element in deleted array"; |
| 34 |
|
static char *danglingVar = "upvar refers to variable in deleted namespace"; |
| 35 |
|
static char *badNamespace = "parent namespace doesn't exist"; |
| 36 |
|
static char *missingName = "missing variable name"; |
| 37 |
|
static char *isArrayElement = "name refers to an element in an array"; |
| 38 |
|
|
| 39 |
|
/* |
| 40 |
|
* Forward references to procedures defined later in this file: |
| 41 |
|
*/ |
| 42 |
|
|
| 43 |
|
static char * CallTraces _ANSI_ARGS_((Interp *iPtr, Var *arrayPtr, |
| 44 |
|
Var *varPtr, char *part1, char *part2, |
| 45 |
|
int flags)); |
| 46 |
|
static void CleanupVar _ANSI_ARGS_((Var *varPtr, |
| 47 |
|
Var *arrayPtr)); |
| 48 |
|
static void DeleteSearches _ANSI_ARGS_((Var *arrayVarPtr)); |
| 49 |
|
static void DeleteArray _ANSI_ARGS_((Interp *iPtr, |
| 50 |
|
char *arrayName, Var *varPtr, int flags)); |
| 51 |
|
static int MakeUpvar _ANSI_ARGS_(( |
| 52 |
|
Interp *iPtr, CallFrame *framePtr, |
| 53 |
|
char *otherP1, char *otherP2, int otherFlags, |
| 54 |
|
char *myName, int myFlags)); |
| 55 |
|
static Var * NewVar _ANSI_ARGS_((void)); |
| 56 |
|
static ArraySearch * ParseSearchId _ANSI_ARGS_((Tcl_Interp *interp, |
| 57 |
|
Var *varPtr, char *varName, char *string)); |
| 58 |
|
static void VarErrMsg _ANSI_ARGS_((Tcl_Interp *interp, |
| 59 |
|
char *part1, char *part2, char *operation, |
| 60 |
|
char *reason)); |
| 61 |
|
|
| 62 |
|
/* |
| 63 |
|
*---------------------------------------------------------------------- |
| 64 |
|
* |
| 65 |
|
* TclLookupVar -- |
| 66 |
|
* |
| 67 |
|
* This procedure is used by virtually all of the variable code to |
| 68 |
|
* locate a variable given its name(s). |
| 69 |
|
* |
| 70 |
|
* Results: |
| 71 |
|
* The return value is a pointer to the variable structure indicated by |
| 72 |
|
* part1 and part2, or NULL if the variable couldn't be found. If the |
| 73 |
|
* variable is found, *arrayPtrPtr is filled in with the address of the |
| 74 |
|
* variable structure for the array that contains the variable (or NULL |
| 75 |
|
* if the variable is a scalar). If the variable can't be found and |
| 76 |
|
* either createPart1 or createPart2 are 1, a new as-yet-undefined |
| 77 |
|
* (VAR_UNDEFINED) variable structure is created, entered into a hash |
| 78 |
|
* table, and returned. |
| 79 |
|
* |
| 80 |
|
* If the variable isn't found and creation wasn't specified, or some |
| 81 |
|
* other error occurs, NULL is returned and an error message is left in |
| 82 |
|
* the interp's result if TCL_LEAVE_ERR_MSG is set in flags. |
| 83 |
|
* |
| 84 |
|
* Note: it's possible for the variable returned to be VAR_UNDEFINED |
| 85 |
|
* even if createPart1 or createPart2 are 1 (these only cause the hash |
| 86 |
|
* table entry or array to be created). For example, the variable might |
| 87 |
|
* be a global that has been unset but is still referenced by a |
| 88 |
|
* procedure, or a variable that has been unset but it only being kept |
| 89 |
|
* in existence (if VAR_UNDEFINED) by a trace. |
| 90 |
|
* |
| 91 |
|
* Side effects: |
| 92 |
|
* New hashtable entries may be created if createPart1 or createPart2 |
| 93 |
|
* are 1. |
| 94 |
|
* |
| 95 |
|
*---------------------------------------------------------------------- |
| 96 |
|
*/ |
| 97 |
|
|
| 98 |
|
Var * |
| 99 |
|
TclLookupVar(interp, part1, part2, flags, msg, createPart1, createPart2, |
| 100 |
|
arrayPtrPtr) |
| 101 |
|
Tcl_Interp *interp; /* Interpreter to use for lookup. */ |
| 102 |
|
register char *part1; /* If part2 isn't NULL, this is the name of |
| 103 |
|
* an array. Otherwise, this |
| 104 |
|
* is a full variable name that could |
| 105 |
|
* include a parenthesized array element. */ |
| 106 |
|
char *part2; /* Name of element within array, or NULL. */ |
| 107 |
|
int flags; /* Only TCL_GLOBAL_ONLY, TCL_NAMESPACE_ONLY, |
| 108 |
|
* and TCL_LEAVE_ERR_MSG bits matter. */ |
| 109 |
|
char *msg; /* Verb to use in error messages, e.g. |
| 110 |
|
* "read" or "set". Only needed if |
| 111 |
|
* TCL_LEAVE_ERR_MSG is set in flags. */ |
| 112 |
|
int createPart1; /* If 1, create hash table entry for part 1 |
| 113 |
|
* of name, if it doesn't already exist. If |
| 114 |
|
* 0, return error if it doesn't exist. */ |
| 115 |
|
int createPart2; /* If 1, create hash table entry for part 2 |
| 116 |
|
* of name, if it doesn't already exist. If |
| 117 |
|
* 0, return error if it doesn't exist. */ |
| 118 |
|
Var **arrayPtrPtr; /* If the name refers to an element of an |
| 119 |
|
* array, *arrayPtrPtr gets filled in with |
| 120 |
|
* address of array variable. Otherwise |
| 121 |
|
* this is set to NULL. */ |
| 122 |
|
{ |
| 123 |
|
Interp *iPtr = (Interp *) interp; |
| 124 |
|
CallFrame *varFramePtr = iPtr->varFramePtr; |
| 125 |
|
/* Points to the procedure call frame whose |
| 126 |
|
* variables are currently in use. Same as |
| 127 |
|
* the current procedure's frame, if any, |
| 128 |
|
* unless an "uplevel" is executing. */ |
| 129 |
|
Tcl_HashTable *tablePtr; /* Points to the hashtable, if any, in which |
| 130 |
|
* to look up the variable. */ |
| 131 |
|
Tcl_Var var; /* Used to search for global names. */ |
| 132 |
|
Var *varPtr; /* Points to the Var structure returned for |
| 133 |
|
* the variable. */ |
| 134 |
|
char *elName; /* Name of array element or NULL; may be |
| 135 |
|
* same as part2, or may be openParen+1. */ |
| 136 |
|
char *openParen, *closeParen; |
| 137 |
|
/* If this procedure parses a name into |
| 138 |
|
* array and index, these point to the |
| 139 |
|
* parens around the index. Otherwise they |
| 140 |
|
* are NULL. These are needed to restore |
| 141 |
|
* the parens after parsing the name. */ |
| 142 |
|
Namespace *varNsPtr, *cxtNsPtr, *dummy1Ptr, *dummy2Ptr; |
| 143 |
|
ResolverScheme *resPtr; |
| 144 |
|
Tcl_HashEntry *hPtr; |
| 145 |
|
register char *p; |
| 146 |
|
int new, i, result; |
| 147 |
|
|
| 148 |
|
varPtr = NULL; |
| 149 |
|
*arrayPtrPtr = NULL; |
| 150 |
|
openParen = closeParen = NULL; |
| 151 |
|
varNsPtr = NULL; /* set non-NULL if a nonlocal variable */ |
| 152 |
|
|
| 153 |
|
/* |
| 154 |
|
* Parse part1 into array name and index. |
| 155 |
|
* Always check if part1 is an array element name and allow it only if |
| 156 |
|
* part2 is not given. |
| 157 |
|
* (if one does not care about creating array elements that can't be used |
| 158 |
|
* from tcl, and prefer slightly better performance, one can put |
| 159 |
|
* the following in an if (part2 == NULL) { ... } block and remove |
| 160 |
|
* the part2's test and error reporting or move that code in array set) |
| 161 |
|
*/ |
| 162 |
|
|
| 163 |
|
elName = part2; |
| 164 |
|
for (p = part1; *p ; p++) { |
| 165 |
|
if (*p == '(') { |
| 166 |
|
openParen = p; |
| 167 |
|
do { |
| 168 |
|
p++; |
| 169 |
|
} while (*p != '\0'); |
| 170 |
|
p--; |
| 171 |
|
if (*p == ')') { |
| 172 |
|
if (part2 != NULL) { |
| 173 |
|
openParen = NULL; |
| 174 |
|
if (flags & TCL_LEAVE_ERR_MSG) { |
| 175 |
|
VarErrMsg(interp, part1, part2, msg, needArray); |
| 176 |
|
} |
| 177 |
|
goto done; |
| 178 |
|
} |
| 179 |
|
closeParen = p; |
| 180 |
|
*openParen = 0; |
| 181 |
|
elName = openParen+1; |
| 182 |
|
} else { |
| 183 |
|
openParen = NULL; |
| 184 |
|
} |
| 185 |
|
break; |
| 186 |
|
} |
| 187 |
|
} |
| 188 |
|
|
| 189 |
|
/* |
| 190 |
|
* If this namespace has a variable resolver, then give it first |
| 191 |
|
* crack at the variable resolution. It may return a Tcl_Var |
| 192 |
|
* value, it may signal to continue onward, or it may signal |
| 193 |
|
* an error. |
| 194 |
|
*/ |
| 195 |
|
if ((flags & TCL_GLOBAL_ONLY) != 0 || iPtr->varFramePtr == NULL) { |
| 196 |
|
cxtNsPtr = iPtr->globalNsPtr; |
| 197 |
|
} else { |
| 198 |
|
cxtNsPtr = iPtr->varFramePtr->nsPtr; |
| 199 |
|
} |
| 200 |
|
|
| 201 |
|
if (cxtNsPtr->varResProc != NULL || iPtr->resolverPtr != NULL) { |
| 202 |
|
resPtr = iPtr->resolverPtr; |
| 203 |
|
|
| 204 |
|
if (cxtNsPtr->varResProc) { |
| 205 |
|
result = (*cxtNsPtr->varResProc)(interp, part1, |
| 206 |
|
(Tcl_Namespace *) cxtNsPtr, flags, &var); |
| 207 |
|
} else { |
| 208 |
|
result = TCL_CONTINUE; |
| 209 |
|
} |
| 210 |
|
|
| 211 |
|
while (result == TCL_CONTINUE && resPtr) { |
| 212 |
|
if (resPtr->varResProc) { |
| 213 |
|
result = (*resPtr->varResProc)(interp, part1, |
| 214 |
|
(Tcl_Namespace *) cxtNsPtr, flags, &var); |
| 215 |
|
} |
| 216 |
|
resPtr = resPtr->nextPtr; |
| 217 |
|
} |
| 218 |
|
|
| 219 |
|
if (result == TCL_OK) { |
| 220 |
|
varPtr = (Var *) var; |
| 221 |
|
goto lookupVarPart2; |
| 222 |
|
} else if (result != TCL_CONTINUE) { |
| 223 |
|
return (Var *) NULL; |
| 224 |
|
} |
| 225 |
|
} |
| 226 |
|
|
| 227 |
|
/* |
| 228 |
|
* Look up part1. Look it up as either a namespace variable or as a |
| 229 |
|
* local variable in a procedure call frame (varFramePtr). |
| 230 |
|
* Interpret part1 as a namespace variable if: |
| 231 |
|
* 1) so requested by a TCL_GLOBAL_ONLY or TCL_NAMESPACE_ONLY flag, |
| 232 |
|
* 2) there is no active frame (we're at the global :: scope), |
| 233 |
|
* 3) the active frame was pushed to define the namespace context |
| 234 |
|
* for a "namespace eval" or "namespace inscope" command, |
| 235 |
|
* 4) the name has namespace qualifiers ("::"s). |
| 236 |
|
* Otherwise, if part1 is a local variable, search first in the |
| 237 |
|
* frame's array of compiler-allocated local variables, then in its |
| 238 |
|
* hashtable for runtime-created local variables. |
| 239 |
|
* |
| 240 |
|
* If createPart1 and the variable isn't found, create the variable and, |
| 241 |
|
* if necessary, create varFramePtr's local var hashtable. |
| 242 |
|
*/ |
| 243 |
|
|
| 244 |
|
if (((flags & (TCL_GLOBAL_ONLY | TCL_NAMESPACE_ONLY)) != 0) |
| 245 |
|
|| (varFramePtr == NULL) |
| 246 |
|
|| !varFramePtr->isProcCallFrame |
| 247 |
|
|| (strstr(part1, "::") != NULL)) { |
| 248 |
|
char *tail; |
| 249 |
|
|
| 250 |
|
/* |
| 251 |
|
* Don't pass TCL_LEAVE_ERR_MSG, we may yet create the variable, |
| 252 |
|
* or otherwise generate our own error! |
| 253 |
|
*/ |
| 254 |
|
var = Tcl_FindNamespaceVar(interp, part1, (Tcl_Namespace *) NULL, |
| 255 |
|
flags & ~TCL_LEAVE_ERR_MSG); |
| 256 |
|
if (var != (Tcl_Var) NULL) { |
| 257 |
|
varPtr = (Var *) var; |
| 258 |
|
} |
| 259 |
|
if (varPtr == NULL) { |
| 260 |
|
if (createPart1) { /* var wasn't found so create it */ |
| 261 |
|
TclGetNamespaceForQualName(interp, part1, (Namespace *) NULL, |
| 262 |
|
flags, &varNsPtr, &dummy1Ptr, &dummy2Ptr, &tail); |
| 263 |
|
|
| 264 |
|
if (varNsPtr == NULL) { |
| 265 |
|
if (flags & TCL_LEAVE_ERR_MSG) { |
| 266 |
|
VarErrMsg(interp, part1, part2, msg, badNamespace); |
| 267 |
|
} |
| 268 |
|
goto done; |
| 269 |
|
} |
| 270 |
|
if (tail == NULL) { |
| 271 |
|
if (flags & TCL_LEAVE_ERR_MSG) { |
| 272 |
|
VarErrMsg(interp, part1, part2, msg, missingName); |
| 273 |
|
} |
| 274 |
|
goto done; |
| 275 |
|
} |
| 276 |
|
hPtr = Tcl_CreateHashEntry(&varNsPtr->varTable, tail, &new); |
| 277 |
|
varPtr = NewVar(); |
| 278 |
|
Tcl_SetHashValue(hPtr, varPtr); |
| 279 |
|
varPtr->hPtr = hPtr; |
| 280 |
|
varPtr->nsPtr = varNsPtr; |
| 281 |
|
} else { /* var wasn't found and not to create it */ |
| 282 |
|
if (flags & TCL_LEAVE_ERR_MSG) { |
| 283 |
|
VarErrMsg(interp, part1, part2, msg, noSuchVar); |
| 284 |
|
} |
| 285 |
|
goto done; |
| 286 |
|
} |
| 287 |
|
} |
| 288 |
|
} else { /* local var: look in frame varFramePtr */ |
| 289 |
|
Proc *procPtr = varFramePtr->procPtr; |
| 290 |
|
int localCt = procPtr->numCompiledLocals; |
| 291 |
|
CompiledLocal *localPtr = procPtr->firstLocalPtr; |
| 292 |
|
Var *localVarPtr = varFramePtr->compiledLocals; |
| 293 |
|
int part1Len = strlen(part1); |
| 294 |
|
|
| 295 |
|
for (i = 0; i < localCt; i++) { |
| 296 |
|
if (!TclIsVarTemporary(localPtr)) { |
| 297 |
|
register char *localName = localVarPtr->name; |
| 298 |
|
if ((part1[0] == localName[0]) |
| 299 |
|
&& (part1Len == localPtr->nameLength) |
| 300 |
|
&& (strcmp(part1, localName) == 0)) { |
| 301 |
|
varPtr = localVarPtr; |
| 302 |
|
break; |
| 303 |
|
} |
| 304 |
|
} |
| 305 |
|
localVarPtr++; |
| 306 |
|
localPtr = localPtr->nextPtr; |
| 307 |
|
} |
| 308 |
|
if (varPtr == NULL) { /* look in the frame's var hash table */ |
| 309 |
|
tablePtr = varFramePtr->varTablePtr; |
| 310 |
|
if (createPart1) { |
| 311 |
|
if (tablePtr == NULL) { |
| 312 |
|
tablePtr = (Tcl_HashTable *) |
| 313 |
|
ckalloc(sizeof(Tcl_HashTable)); |
| 314 |
|
Tcl_InitHashTable(tablePtr, TCL_STRING_KEYS); |
| 315 |
|
varFramePtr->varTablePtr = tablePtr; |
| 316 |
|
} |
| 317 |
|
hPtr = Tcl_CreateHashEntry(tablePtr, part1, &new); |
| 318 |
|
if (new) { |
| 319 |
|
varPtr = NewVar(); |
| 320 |
|
Tcl_SetHashValue(hPtr, varPtr); |
| 321 |
|
varPtr->hPtr = hPtr; |
| 322 |
|
varPtr->nsPtr = NULL; /* a local variable */ |
| 323 |
|
} else { |
| 324 |
|
varPtr = (Var *) Tcl_GetHashValue(hPtr); |
| 325 |
|
} |
| 326 |
|
} else { |
| 327 |
|
hPtr = NULL; |
| 328 |
|
if (tablePtr != NULL) { |
| 329 |
|
hPtr = Tcl_FindHashEntry(tablePtr, part1); |
| 330 |
|
} |
| 331 |
|
if (hPtr == NULL) { |
| 332 |
|
if (flags & TCL_LEAVE_ERR_MSG) { |
| 333 |
|
VarErrMsg(interp, part1, part2, msg, noSuchVar); |
| 334 |
|
} |
| 335 |
|
goto done; |
| 336 |
|
} |
| 337 |
|
varPtr = (Var *) Tcl_GetHashValue(hPtr); |
| 338 |
|
} |
| 339 |
|
} |
| 340 |
|
} |
| 341 |
|
|
| 342 |
|
lookupVarPart2: |
| 343 |
|
if (openParen != NULL) { |
| 344 |
|
*openParen = '('; |
| 345 |
|
openParen = NULL; |
| 346 |
|
} |
| 347 |
|
|
| 348 |
|
/* |
| 349 |
|
* If varPtr is a link variable, we have a reference to some variable |
| 350 |
|
* that was created through an "upvar" or "global" command. Traverse |
| 351 |
|
* through any links until we find the referenced variable. |
| 352 |
|
*/ |
| 353 |
|
|
| 354 |
|
while (TclIsVarLink(varPtr)) { |
| 355 |
|
varPtr = varPtr->value.linkPtr; |
| 356 |
|
} |
| 357 |
|
|
| 358 |
|
/* |
| 359 |
|
* If we're not dealing with an array element, return varPtr. |
| 360 |
|
*/ |
| 361 |
|
|
| 362 |
|
if (elName == NULL) { |
| 363 |
|
goto done; |
| 364 |
|
} |
| 365 |
|
|
| 366 |
|
/* |
| 367 |
|
* We're dealing with an array element. Make sure the variable is an |
| 368 |
|
* array and look up the element (create the element if desired). |
| 369 |
|
*/ |
| 370 |
|
|
| 371 |
|
if (TclIsVarUndefined(varPtr) && !TclIsVarArrayElement(varPtr)) { |
| 372 |
|
if (!createPart1) { |
| 373 |
|
if (flags & TCL_LEAVE_ERR_MSG) { |
| 374 |
|
VarErrMsg(interp, part1, part2, msg, noSuchVar); |
| 375 |
|
} |
| 376 |
|
varPtr = NULL; |
| 377 |
|
goto done; |
| 378 |
|
} |
| 379 |
|
|
| 380 |
|
/* |
| 381 |
|
* Make sure we are not resurrecting a namespace variable from a |
| 382 |
|
* deleted namespace! |
| 383 |
|
*/ |
| 384 |
|
if ((varPtr->flags & VAR_IN_HASHTABLE) && (varPtr->hPtr == NULL)) { |
| 385 |
|
if (flags & TCL_LEAVE_ERR_MSG) { |
| 386 |
|
VarErrMsg(interp, part1, part2, msg, danglingVar); |
| 387 |
|
} |
| 388 |
|
varPtr = NULL; |
| 389 |
|
goto done; |
| 390 |
|
} |
| 391 |
|
|
| 392 |
|
TclSetVarArray(varPtr); |
| 393 |
|
TclClearVarUndefined(varPtr); |
| 394 |
|
varPtr->value.tablePtr = |
| 395 |
|
(Tcl_HashTable *) ckalloc(sizeof(Tcl_HashTable)); |
| 396 |
|
Tcl_InitHashTable(varPtr->value.tablePtr, TCL_STRING_KEYS); |
| 397 |
|
} else if (!TclIsVarArray(varPtr)) { |
| 398 |
|
if (flags & TCL_LEAVE_ERR_MSG) { |
| 399 |
|
VarErrMsg(interp, part1, part2, msg, needArray); |
| 400 |
|
} |
| 401 |
|
varPtr = NULL; |
| 402 |
|
goto done; |
| 403 |
|
} |
| 404 |
|
*arrayPtrPtr = varPtr; |
| 405 |
|
if (closeParen != NULL) { |
| 406 |
|
*closeParen = 0; |
| 407 |
|
} |
| 408 |
|
if (createPart2) { |
| 409 |
|
hPtr = Tcl_CreateHashEntry(varPtr->value.tablePtr, elName, &new); |
| 410 |
|
if (closeParen != NULL) { |
| 411 |
|
*closeParen = ')'; |
| 412 |
|
} |
| 413 |
|
if (new) { |
| 414 |
|
if (varPtr->searchPtr != NULL) { |
| 415 |
|
DeleteSearches(varPtr); |
| 416 |
|
} |
| 417 |
|
varPtr = NewVar(); |
| 418 |
|
Tcl_SetHashValue(hPtr, varPtr); |
| 419 |
|
varPtr->hPtr = hPtr; |
| 420 |
|
varPtr->nsPtr = varNsPtr; |
| 421 |
|
TclSetVarArrayElement(varPtr); |
| 422 |
|
} |
| 423 |
|
} else { |
| 424 |
|
hPtr = Tcl_FindHashEntry(varPtr->value.tablePtr, elName); |
| 425 |
|
if (closeParen != NULL) { |
| 426 |
|
*closeParen = ')'; |
| 427 |
|
} |
| 428 |
|
if (hPtr == NULL) { |
| 429 |
|
if (flags & TCL_LEAVE_ERR_MSG) { |
| 430 |
|
VarErrMsg(interp, part1, part2, msg, noSuchElement); |
| 431 |
|
} |
| 432 |
|
varPtr = NULL; |
| 433 |
|
goto done; |
| 434 |
|
} |
| 435 |
|
} |
| 436 |
|
varPtr = (Var *) Tcl_GetHashValue(hPtr); |
| 437 |
|
|
| 438 |
|
done: |
| 439 |
|
if (openParen != NULL) { |
| 440 |
|
*openParen = '('; |
| 441 |
|
} |
| 442 |
|
return varPtr; |
| 443 |
|
} |
| 444 |
|
|
| 445 |
|
/* |
| 446 |
|
*---------------------------------------------------------------------- |
| 447 |
|
* |
| 448 |
|
* Tcl_GetVar -- |
| 449 |
|
* |
| 450 |
|
* Return the value of a Tcl variable as a string. |
| 451 |
|
* |
| 452 |
|
* Results: |
| 453 |
|
* The return value points to the current value of varName as a string. |
| 454 |
|
* If the variable is not defined or can't be read because of a clash |
| 455 |
|
* in array usage then a NULL pointer is returned and an error message |
| 456 |
|
* is left in the interp's result if the TCL_LEAVE_ERR_MSG flag is set. |
| 457 |
|
* Note: the return value is only valid up until the next change to the |
| 458 |
|
* variable; if you depend on the value lasting longer than that, then |
| 459 |
|
* make yourself a private copy. |
| 460 |
|
* |
| 461 |
|
* Side effects: |
| 462 |
|
* None. |
| 463 |
|
* |
| 464 |
|
*---------------------------------------------------------------------- |
| 465 |
|
*/ |
| 466 |
|
|
| 467 |
|
char * |
| 468 |
|
Tcl_GetVar(interp, varName, flags) |
| 469 |
|
Tcl_Interp *interp; /* Command interpreter in which varName is |
| 470 |
|
* to be looked up. */ |
| 471 |
|
char *varName; /* Name of a variable in interp. */ |
| 472 |
|
int flags; /* OR-ed combination of TCL_GLOBAL_ONLY, |
| 473 |
|
* TCL_NAMESPACE_ONLY or TCL_LEAVE_ERR_MSG |
| 474 |
|
* bits. */ |
| 475 |
|
{ |
| 476 |
|
return Tcl_GetVar2(interp, varName, (char *) NULL, flags); |
| 477 |
|
} |
| 478 |
|
|
| 479 |
|
/* |
| 480 |
|
*---------------------------------------------------------------------- |
| 481 |
|
* |
| 482 |
|
* Tcl_GetVar2 -- |
| 483 |
|
* |
| 484 |
|
* Return the value of a Tcl variable as a string, given a two-part |
| 485 |
|
* name consisting of array name and element within array. |
| 486 |
|
* |
| 487 |
|
* Results: |
| 488 |
|
* The return value points to the current value of the variable given |
| 489 |
|
* by part1 and part2 as a string. If the specified variable doesn't |
| 490 |
|
* exist, or if there is a clash in array usage, then NULL is returned |
| 491 |
|
* and a message will be left in the interp's result if the |
| 492 |
|
* TCL_LEAVE_ERR_MSG flag is set. Note: the return value is only valid |
| 493 |
|
* up until the next change to the variable; if you depend on the value |
| 494 |
|
* lasting longer than that, then make yourself a private copy. |
| 495 |
|
* |
| 496 |
|
* Side effects: |
| 497 |
|
* None. |
| 498 |
|
* |
| 499 |
|
*---------------------------------------------------------------------- |
| 500 |
|
*/ |
| 501 |
|
|
| 502 |
|
char * |
| 503 |
|
Tcl_GetVar2(interp, part1, part2, flags) |
| 504 |
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
| 505 |
|
* to be looked up. */ |
| 506 |
|
char *part1; /* Name of an array (if part2 is non-NULL) |
| 507 |
|
* or the name of a variable. */ |
| 508 |
|
char *part2; /* If non-NULL, gives the name of an element |
| 509 |
|
* in the array part1. */ |
| 510 |
|
int flags; /* OR-ed combination of TCL_GLOBAL_ONLY, |
| 511 |
|
* TCL_NAMESPACE_ONLY and TCL_LEAVE_ERR_MSG |
| 512 |
|
* bits. */ |
| 513 |
|
{ |
| 514 |
|
Tcl_Obj *objPtr; |
| 515 |
|
|
| 516 |
|
objPtr = Tcl_GetVar2Ex(interp, part1, part2, flags); |
| 517 |
|
if (objPtr == NULL) { |
| 518 |
|
return NULL; |
| 519 |
|
} |
| 520 |
|
return TclGetString(objPtr); |
| 521 |
|
} |
| 522 |
|
/* |
| 523 |
|
*---------------------------------------------------------------------- |
| 524 |
|
* |
| 525 |
|
* Tcl_ObjGetVar2 -- |
| 526 |
|
* |
| 527 |
|
* Return the value of a Tcl variable as a Tcl object, given a |
| 528 |
|
* two-part name consisting of array name and element within array. |
| 529 |
|
* |
| 530 |
|
* Results: |
| 531 |
|
* The return value points to the current object value of the variable |
| 532 |
|
* given by part1Ptr and part2Ptr. If the specified variable doesn't |
| 533 |
|
* exist, or if there is a clash in array usage, then NULL is returned |
| 534 |
|
* and a message will be left in the interpreter's result if the |
| 535 |
|
* TCL_LEAVE_ERR_MSG flag is set. |
| 536 |
|
* |
| 537 |
|
* Side effects: |
| 538 |
|
* The ref count for the returned object is _not_ incremented to |
| 539 |
|
* reflect the returned reference; if you want to keep a reference to |
| 540 |
|
* the object you must increment its ref count yourself. |
| 541 |
|
* |
| 542 |
|
*---------------------------------------------------------------------- |
| 543 |
|
*/ |
| 544 |
|
|
| 545 |
|
Tcl_Obj * |
| 546 |
|
Tcl_ObjGetVar2(interp, part1Ptr, part2Ptr, flags) |
| 547 |
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
| 548 |
|
* to be looked up. */ |
| 549 |
|
register Tcl_Obj *part1Ptr; /* Points to an object holding the name of |
| 550 |
|
* an array (if part2 is non-NULL) or the |
| 551 |
|
* name of a variable. */ |
| 552 |
|
register Tcl_Obj *part2Ptr; /* If non-null, points to an object holding |
| 553 |
|
* the name of an element in the array |
| 554 |
|
* part1Ptr. */ |
| 555 |
|
int flags; /* OR-ed combination of TCL_GLOBAL_ONLY, |
| 556 |
|
* TCL_LEAVE_ERR_MSG, and |
| 557 |
|
* TCL_PARSE_PART1 bits. */ |
| 558 |
|
{ |
| 559 |
|
char *part1, *part2; |
| 560 |
|
|
| 561 |
|
part1 = Tcl_GetString(part1Ptr); |
| 562 |
|
if (part2Ptr != NULL) { |
| 563 |
|
part2 = Tcl_GetString(part2Ptr); |
| 564 |
|
} else { |
| 565 |
|
part2 = NULL; |
| 566 |
|
} |
| 567 |
|
|
| 568 |
|
return Tcl_GetVar2Ex(interp, part1, part2, flags); |
| 569 |
|
} |
| 570 |
|
|
| 571 |
|
/* |
| 572 |
|
*---------------------------------------------------------------------- |
| 573 |
|
* |
| 574 |
|
* Tcl_GetVar2Ex -- |
| 575 |
|
* |
| 576 |
|
* Return the value of a Tcl variable as a Tcl object, given a |
| 577 |
|
* two-part name consisting of array name and element within array. |
| 578 |
|
* |
| 579 |
|
* Results: |
| 580 |
|
* The return value points to the current object value of the variable |
| 581 |
|
* given by part1Ptr and part2Ptr. If the specified variable doesn't |
| 582 |
|
* exist, or if there is a clash in array usage, then NULL is returned |
| 583 |
|
* and a message will be left in the interpreter's result if the |
| 584 |
|
* TCL_LEAVE_ERR_MSG flag is set. |
| 585 |
|
* |
| 586 |
|
* Side effects: |
| 587 |
|
* The ref count for the returned object is _not_ incremented to |
| 588 |
|
* reflect the returned reference; if you want to keep a reference to |
| 589 |
|
* the object you must increment its ref count yourself. |
| 590 |
|
* |
| 591 |
|
*---------------------------------------------------------------------- |
| 592 |
|
*/ |
| 593 |
|
|
| 594 |
|
Tcl_Obj * |
| 595 |
|
Tcl_GetVar2Ex(interp, part1, part2, flags) |
| 596 |
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
| 597 |
|
* to be looked up. */ |
| 598 |
|
char *part1; /* Name of an array (if part2 is non-NULL) |
| 599 |
|
* or the name of a variable. */ |
| 600 |
|
char *part2; /* If non-NULL, gives the name of an element |
| 601 |
|
* in the array part1. */ |
| 602 |
|
int flags; /* OR-ed combination of TCL_GLOBAL_ONLY, |
| 603 |
|
* and TCL_LEAVE_ERR_MSG bits. */ |
| 604 |
|
{ |
| 605 |
|
Interp *iPtr = (Interp *) interp; |
| 606 |
|
register Var *varPtr; |
| 607 |
|
Var *arrayPtr; |
| 608 |
|
char *msg; |
| 609 |
|
|
| 610 |
|
varPtr = TclLookupVar(interp, part1, part2, flags, "read", |
| 611 |
|
/*createPart1*/ 0, /*createPart2*/ 1, &arrayPtr); |
| 612 |
|
if (varPtr == NULL) { |
| 613 |
|
return NULL; |
| 614 |
|
} |
| 615 |
|
|
| 616 |
|
/* |
| 617 |
|
* Invoke any traces that have been set for the variable. |
| 618 |
|
*/ |
| 619 |
|
|
| 620 |
|
if ((varPtr->tracePtr != NULL) |
| 621 |
|
|| ((arrayPtr != NULL) && (arrayPtr->tracePtr != NULL))) { |
| 622 |
|
msg = CallTraces(iPtr, arrayPtr, varPtr, part1, part2, |
| 623 |
|
(flags & (TCL_NAMESPACE_ONLY|TCL_GLOBAL_ONLY)) | TCL_TRACE_READS); |
| 624 |
|
if (msg != NULL) { |
| 625 |
|
if (flags & TCL_LEAVE_ERR_MSG) { |
| 626 |
|
VarErrMsg(interp, part1, part2, "read", msg); |
| 627 |
|
} |
| 628 |
|
goto errorReturn; |
| 629 |
|
} |
| 630 |
|
} |
| 631 |
|
|
| 632 |
|
/* |
| 633 |
|
* Return the element if it's an existing scalar variable. |
| 634 |
|
*/ |
| 635 |
|
|
| 636 |
|
if (TclIsVarScalar(varPtr) && !TclIsVarUndefined(varPtr)) { |
| 637 |
|
return varPtr->value.objPtr; |
| 638 |
|
} |
| 639 |
|
|
| 640 |
|
if (flags & TCL_LEAVE_ERR_MSG) { |
| 641 |
|
if (TclIsVarUndefined(varPtr) && (arrayPtr != NULL) |
| 642 |
|
&& !TclIsVarUndefined(arrayPtr)) { |
| 643 |
|
msg = noSuchElement; |
| 644 |
|
} else if (TclIsVarArray(varPtr)) { |
| 645 |
|
msg = isArray; |
| 646 |
|
} else { |
| 647 |
|
msg = noSuchVar; |
| 648 |
|
} |
| 649 |
|
VarErrMsg(interp, part1, part2, "read", msg); |
| 650 |
|
} |
| 651 |
|
|
| 652 |
|
/* |
| 653 |
|
* An error. If the variable doesn't exist anymore and no-one's using |
| 654 |
|
* it, then free up the relevant structures and hash table entries. |
| 655 |
|
*/ |
| 656 |
|
|
| 657 |
|
errorReturn: |
| 658 |
|
if (TclIsVarUndefined(varPtr)) { |
| 659 |
|
CleanupVar(varPtr, arrayPtr); |
| 660 |
|
} |
| 661 |
|
return NULL; |
| 662 |
|
} |
| 663 |
|
|
| 664 |
|
/* |
| 665 |
|
*---------------------------------------------------------------------- |
| 666 |
|
* |
| 667 |
|
* TclGetIndexedScalar -- |
| 668 |
|
* |
| 669 |
|
* Return the Tcl object value of a local scalar variable in the active |
| 670 |
|
* procedure, given its index in the procedure's array of compiler |
| 671 |
|
* allocated local variables. |
| 672 |
|
* |
| 673 |
|
* Results: |
| 674 |
|
* The return value points to the current object value of the variable |
| 675 |
|
* given by localIndex. If the specified variable doesn't exist, or |
| 676 |
|
* there is a clash in array usage, or an error occurs while executing |
| 677 |
|
* variable traces, then NULL is returned and a message will be left in |
| 678 |
|
* the interpreter's result if leaveErrorMsg is 1. |
| 679 |
|
* |
| 680 |
|
* Side effects: |
| 681 |
|
* The ref count for the returned object is _not_ incremented to |
| 682 |
|
* reflect the returned reference; if you want to keep a reference to |
| 683 |
|
* the object you must increment its ref count yourself. |
| 684 |
|
* |
| 685 |
|
*---------------------------------------------------------------------- |
| 686 |
|
*/ |
| 687 |
|
|
| 688 |
|
Tcl_Obj * |
| 689 |
|
TclGetIndexedScalar(interp, localIndex, leaveErrorMsg) |
| 690 |
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
| 691 |
|
* to be looked up. */ |
| 692 |
|
register int localIndex; /* Index of variable in procedure's array |
| 693 |
|
* of local variables. */ |
| 694 |
|
int leaveErrorMsg; /* 1 if to leave an error message in |
| 695 |
|
* interpreter's result on an error. |
| 696 |
|
* Otherwise no error message is left. */ |
| 697 |
|
{ |
| 698 |
|
Interp *iPtr = (Interp *) interp; |
| 699 |
|
CallFrame *varFramePtr = iPtr->varFramePtr; |
| 700 |
|
/* Points to the procedure call frame whose |
| 701 |
|
* variables are currently in use. Same as |
| 702 |
|
* the current procedure's frame, if any, |
| 703 |
|
* unless an "uplevel" is executing. */ |
| 704 |
|
Var *compiledLocals = varFramePtr->compiledLocals; |
| 705 |
|
register Var *varPtr; /* Points to the variable's in-frame Var |
| 706 |
|
* structure. */ |
| 707 |
|
char *varName; /* Name of the local variable. */ |
| 708 |
|
char *msg; |
| 709 |
|
|
| 710 |
|
#ifdef TCL_COMPILE_DEBUG |
| 711 |
|
int localCt = varFramePtr->procPtr->numCompiledLocals; |
| 712 |
|
|
| 713 |
|
if (compiledLocals == NULL) { |
| 714 |
|
fprintf(stderr, "\nTclGetIndexedScalar: can't get local %i in frame 0x%x, no compiled locals\n", |
| 715 |
|
localIndex, (unsigned int) varFramePtr); |
| 716 |
|
panic("TclGetIndexedScalar: no compiled locals in frame 0x%x", |
| 717 |
|
(unsigned int) varFramePtr); |
| 718 |
|
} |
| 719 |
|
if ((localIndex < 0) || (localIndex >= localCt)) { |
| 720 |
|
fprintf(stderr, "\nTclGetIndexedScalar: can't get local %i in frame 0x%x with %i locals\n", |
| 721 |
|
localIndex, (unsigned int) varFramePtr, localCt); |
| 722 |
|
panic("TclGetIndexedScalar: bad local index %i in frame 0x%x", |
| 723 |
|
localIndex, (unsigned int) varFramePtr); |
| 724 |
|
} |
| 725 |
|
#endif /* TCL_COMPILE_DEBUG */ |
| 726 |
|
|
| 727 |
|
varPtr = &(compiledLocals[localIndex]); |
| 728 |
|
varName = varPtr->name; |
| 729 |
|
|
| 730 |
|
/* |
| 731 |
|
* If varPtr is a link variable, we have a reference to some variable |
| 732 |
|
* that was created through an "upvar" or "global" command, or we have a |
| 733 |
|
* reference to a variable in an enclosing namespace. Traverse through |
| 734 |
|
* any links until we find the referenced variable. |
| 735 |
|
*/ |
| 736 |
|
|
| 737 |
|
while (TclIsVarLink(varPtr)) { |
| 738 |
|
varPtr = varPtr->value.linkPtr; |
| 739 |
|
} |
| 740 |
|
|
| 741 |
|
/* |
| 742 |
|
* Invoke any traces that have been set for the variable. |
| 743 |
|
*/ |
| 744 |
|
|
| 745 |
|
if (varPtr->tracePtr != NULL) { |
| 746 |
|
msg = CallTraces(iPtr, /*arrayPtr*/ NULL, varPtr, varName, NULL, |
| 747 |
|
TCL_TRACE_READS); |
| 748 |
|
if (msg != NULL) { |
| 749 |
|
if (leaveErrorMsg) { |
| 750 |
|
VarErrMsg(interp, varName, NULL, "read", msg); |
| 751 |
|
} |
| 752 |
|
return NULL; |
| 753 |
|
} |
| 754 |
|
} |
| 755 |
|
|
| 756 |
|
/* |
| 757 |
|
* Make sure we're dealing with a scalar variable and not an array, and |
| 758 |
|
* that the variable exists (isn't undefined). |
| 759 |
|
*/ |
| 760 |
|
|
| 761 |
|
if (!TclIsVarScalar(varPtr) || TclIsVarUndefined(varPtr)) { |
| 762 |
|
if (leaveErrorMsg) { |
| 763 |
|
if (TclIsVarArray(varPtr)) { |
| 764 |
|
msg = isArray; |
| 765 |
|
} else { |
| 766 |
|
msg = noSuchVar; |
| 767 |
|
} |
| 768 |
|
VarErrMsg(interp, varName, NULL, "read", msg); |
| 769 |
|
|
| 770 |
|
} |
| 771 |
|
return NULL; |
| 772 |
|
} |
| 773 |
|
return varPtr->value.objPtr; |
| 774 |
|
} |
| 775 |
|
|
| 776 |
|
/* |
| 777 |
|
*---------------------------------------------------------------------- |
| 778 |
|
* |
| 779 |
|
* TclGetElementOfIndexedArray -- |
| 780 |
|
* |
| 781 |
|
* Return the Tcl object value for an element in a local array |
| 782 |
|
* variable. The element is named by the object elemPtr while the |
| 783 |
|
* array is specified by its index in the active procedure's array |
| 784 |
|
* of compiler allocated local variables. |
| 785 |
|
* |
| 786 |
|
* Results: |
| 787 |
|
* The return value points to the current object value of the |
| 788 |
|
* element. If the specified array or element doesn't exist, or there |
| 789 |
|
* is a clash in array usage, or an error occurs while executing |
| 790 |
|
* variable traces, then NULL is returned and a message will be left in |
| 791 |
|
* the interpreter's result if leaveErrorMsg is 1. |
| 792 |
|
* |
| 793 |
|
* Side effects: |
| 794 |
|
* The ref count for the returned object is _not_ incremented to |
| 795 |
|
* reflect the returned reference; if you want to keep a reference to |
| 796 |
|
* the object you must increment its ref count yourself. |
| 797 |
|
* |
| 798 |
|
*---------------------------------------------------------------------- |
| 799 |
|
*/ |
| 800 |
|
|
| 801 |
|
Tcl_Obj * |
| 802 |
|
TclGetElementOfIndexedArray(interp, localIndex, elemPtr, leaveErrorMsg) |
| 803 |
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
| 804 |
|
* to be looked up. */ |
| 805 |
|
int localIndex; /* Index of array variable in procedure's |
| 806 |
|
* array of local variables. */ |
| 807 |
|
Tcl_Obj *elemPtr; /* Points to an object holding the name of |
| 808 |
|
* an element to get in the array. */ |
| 809 |
|
int leaveErrorMsg; /* 1 if to leave an error message in |
| 810 |
|
* the interpreter's result on an error. |
| 811 |
|
* Otherwise no error message is left. */ |
| 812 |
|
{ |
| 813 |
|
Interp *iPtr = (Interp *) interp; |
| 814 |
|
CallFrame *varFramePtr = iPtr->varFramePtr; |
| 815 |
|
/* Points to the procedure call frame whose |
| 816 |
|
* variables are currently in use. Same as |
| 817 |
|
* the current procedure's frame, if any, |
| 818 |
|
* unless an "uplevel" is executing. */ |
| 819 |
|
Var *compiledLocals = varFramePtr->compiledLocals; |
| 820 |
|
Var *arrayPtr; /* Points to the array's in-frame Var |
| 821 |
|
* structure. */ |
| 822 |
|
char *arrayName; /* Name of the local array. */ |
| 823 |
|
Tcl_HashEntry *hPtr; |
| 824 |
|
Var *varPtr = NULL; /* Points to the element's Var structure |
| 825 |
|
* that we return. Initialized to avoid |
| 826 |
|
* compiler warning. */ |
| 827 |
|
char *elem, *msg; |
| 828 |
|
int new; |
| 829 |
|
|
| 830 |
|
#ifdef TCL_COMPILE_DEBUG |
| 831 |
|
Proc *procPtr = varFramePtr->procPtr; |
| 832 |
|
int localCt = procPtr->numCompiledLocals; |
| 833 |
|
|
| 834 |
|
if (compiledLocals == NULL) { |
| 835 |
|
fprintf(stderr, "\nTclGetElementOfIndexedArray: can't get element of local %i in frame 0x%x, no compiled locals\n", |
| 836 |
|
localIndex, (unsigned int) varFramePtr); |
| 837 |
|
panic("TclGetIndexedScalar: no compiled locals in frame 0x%x", |
| 838 |
|
(unsigned int) varFramePtr); |
| 839 |
|
} |
| 840 |
|
if ((localIndex < 0) || (localIndex >= localCt)) { |
| 841 |
|
fprintf(stderr, "\nTclGetIndexedScalar: can't get element of local %i in frame 0x%x with %i locals\n", |
| 842 |
|
localIndex, (unsigned int) varFramePtr, localCt); |
| 843 |
|
panic("TclGetElementOfIndexedArray: bad local index %i in frame 0x%x", |
| 844 |
|
localIndex, (unsigned int) varFramePtr); |
| 845 |
|
} |
| 846 |
|
#endif /* TCL_COMPILE_DEBUG */ |
| 847 |
|
|
| 848 |
|
elem = TclGetString(elemPtr); |
| 849 |
|
arrayPtr = &(compiledLocals[localIndex]); |
| 850 |
|
arrayName = arrayPtr->name; |
| 851 |
|
|
| 852 |
|
/* |
| 853 |
|
* If arrayPtr is a link variable, we have a reference to some variable |
| 854 |
|
* that was created through an "upvar" or "global" command, or we have a |
| 855 |
|
* reference to a variable in an enclosing namespace. Traverse through |
| 856 |
|
* any links until we find the referenced variable. |
| 857 |
|
*/ |
| 858 |
|
|
| 859 |
|
while (TclIsVarLink(arrayPtr)) { |
| 860 |
|
arrayPtr = arrayPtr->value.linkPtr; |
| 861 |
|
} |
| 862 |
|
|
| 863 |
|
/* |
| 864 |
|
* Make sure we're dealing with an array and that the array variable |
| 865 |
|
* exists (isn't undefined). |
| 866 |
|
*/ |
| 867 |
|
|
| 868 |
|
if (!TclIsVarArray(arrayPtr) || TclIsVarUndefined(arrayPtr)) { |
| 869 |
|
if (leaveErrorMsg) { |
| 870 |
|
VarErrMsg(interp, arrayName, elem, "read", noSuchVar); |
| 871 |
|
} |
| 872 |
|
goto errorReturn; |
| 873 |
|
} |
| 874 |
|
|
| 875 |
|
/* |
| 876 |
|
* Look up the element. Note that we must create the element (but leave |
| 877 |
|
* it marked undefined) if it does not already exist. This allows a |
| 878 |
|
* trace to create new array elements "on the fly" that did not exist |
| 879 |
|
* before. A trace is always passed a variable for the array element. If |
| 880 |
|
* the trace does not define the variable, it will be deleted below (at |
| 881 |
|
* errorReturn) and an error returned. |
| 882 |
|
*/ |
| 883 |
|
|
| 884 |
|
hPtr = Tcl_CreateHashEntry(arrayPtr->value.tablePtr, elem, &new); |
| 885 |
|
if (new) { |
| 886 |
|
if (arrayPtr->searchPtr != NULL) { |
| 887 |
|
DeleteSearches(arrayPtr); |
| 888 |
|
} |
| 889 |
|
varPtr = NewVar(); |
| 890 |
|
Tcl_SetHashValue(hPtr, varPtr); |
| 891 |
|
varPtr->hPtr = hPtr; |
| 892 |
|
varPtr->nsPtr = varFramePtr->nsPtr; |
| 893 |
|
TclSetVarArrayElement(varPtr); |
| 894 |
|
} else { |
| 895 |
|
varPtr = (Var *) Tcl_GetHashValue(hPtr); |
| 896 |
|
} |
| 897 |
|
|
| 898 |
|
/* |
| 899 |
|
* Invoke any traces that have been set for the element variable. |
| 900 |
|
*/ |
| 901 |
|
|
| 902 |
|
if ((varPtr->tracePtr != NULL) |
| 903 |
|
|| ((arrayPtr != NULL) && (arrayPtr->tracePtr != NULL))) { |
| 904 |
|
msg = CallTraces(iPtr, arrayPtr, varPtr, arrayName, elem, |
| 905 |
|
TCL_TRACE_READS); |
| 906 |
|
if (msg != NULL) { |
| 907 |
|
if (leaveErrorMsg) { |
| 908 |
|
VarErrMsg(interp, arrayName, elem, "read", msg); |
| 909 |
|
} |
| 910 |
|
goto errorReturn; |
| 911 |
|
} |
| 912 |
|
} |
| 913 |
|
|
| 914 |
|
/* |
| 915 |
|
* Return the element if it's an existing scalar variable. |
| 916 |
|
*/ |
| 917 |
|
|
| 918 |
|
if (TclIsVarScalar(varPtr) && !TclIsVarUndefined(varPtr)) { |
| 919 |
|
return varPtr->value.objPtr; |
| 920 |
|
} |
| 921 |
|
|
| 922 |
|
if (leaveErrorMsg) { |
| 923 |
|
if (TclIsVarArray(varPtr)) { |
| 924 |
|
msg = isArray; |
| 925 |
|
} else { |
| 926 |
|
msg = noSuchVar; |
| 927 |
|
} |
| 928 |
|
VarErrMsg(interp, arrayName, elem, "read", msg); |
| 929 |
|
} |
| 930 |
|
|
| 931 |
|
/* |
| 932 |
|
* An error. If the variable doesn't exist anymore and no-one's using |
| 933 |
|
* it, then free up the relevant structures and hash table entries. |
| 934 |
|
*/ |
| 935 |
|
|
| 936 |
|
errorReturn: |
| 937 |
|
if ((varPtr != NULL) && TclIsVarUndefined(varPtr)) { |
| 938 |
|
CleanupVar(varPtr, NULL); /* the array is not in a hashtable */ |
| 939 |
|
} |
| 940 |
|
return NULL; |
| 941 |
|
} |
| 942 |
|
|
| 943 |
|
/* |
| 944 |
|
*---------------------------------------------------------------------- |
| 945 |
|
* |
| 946 |
|
* Tcl_SetObjCmd -- |
| 947 |
|
* |
| 948 |
|
* This procedure is invoked to process the "set" Tcl command. |
| 949 |
|
* See the user documentation for details on what it does. |
| 950 |
|
* |
| 951 |
|
* Results: |
| 952 |
|
* A standard Tcl result value. |
| 953 |
|
* |
| 954 |
|
* Side effects: |
| 955 |
|
* A variable's value may be changed. |
| 956 |
|
* |
| 957 |
|
*---------------------------------------------------------------------- |
| 958 |
|
*/ |
| 959 |
|
|
| 960 |
|
/* ARGSUSED */ |
| 961 |
|
int |
| 962 |
|
Tcl_SetObjCmd(dummy, interp, objc, objv) |
| 963 |
|
ClientData dummy; /* Not used. */ |
| 964 |
|
register Tcl_Interp *interp; /* Current interpreter. */ |
| 965 |
|
int objc; /* Number of arguments. */ |
| 966 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 967 |
|
{ |
| 968 |
|
Tcl_Obj *varValueObj; |
| 969 |
|
|
| 970 |
|
if (objc == 2) { |
| 971 |
|
varValueObj = Tcl_ObjGetVar2(interp, objv[1], NULL, TCL_LEAVE_ERR_MSG); |
| 972 |
|
if (varValueObj == NULL) { |
| 973 |
|
return TCL_ERROR; |
| 974 |
|
} |
| 975 |
|
Tcl_SetObjResult(interp, varValueObj); |
| 976 |
|
return TCL_OK; |
| 977 |
|
} else if (objc == 3) { |
| 978 |
|
|
| 979 |
|
varValueObj = Tcl_ObjSetVar2(interp, objv[1], NULL, objv[2], |
| 980 |
|
TCL_LEAVE_ERR_MSG); |
| 981 |
|
if (varValueObj == NULL) { |
| 982 |
|
return TCL_ERROR; |
| 983 |
|
} |
| 984 |
|
Tcl_SetObjResult(interp, varValueObj); |
| 985 |
|
return TCL_OK; |
| 986 |
|
} else { |
| 987 |
|
Tcl_WrongNumArgs(interp, 1, objv, "varName ?newValue?"); |
| 988 |
|
return TCL_ERROR; |
| 989 |
|
} |
| 990 |
|
} |
| 991 |
|
|
| 992 |
|
/* |
| 993 |
|
*---------------------------------------------------------------------- |
| 994 |
|
* |
| 995 |
|
* Tcl_SetVar -- |
| 996 |
|
* |
| 997 |
|
* Change the value of a variable. |
| 998 |
|
* |
| 999 |
|
* Results: |
| 1000 |
|
* Returns a pointer to the malloc'ed string which is the character |
| 1001 |
|
* representation of the variable's new value. The caller must not |
| 1002 |
|
* modify this string. If the write operation was disallowed then NULL |
| 1003 |
|
* is returned; if the TCL_LEAVE_ERR_MSG flag is set, then an |
| 1004 |
|
* explanatory message will be left in the interp's result. Note that the |
| 1005 |
|
* returned string may not be the same as newValue; this is because |
| 1006 |
|
* variable traces may modify the variable's value. |
| 1007 |
|
* |
| 1008 |
|
* Side effects: |
| 1009 |
|
* If varName is defined as a local or global variable in interp, |
| 1010 |
|
* its value is changed to newValue. If varName isn't currently |
| 1011 |
|
* defined, then a new global variable by that name is created. |
| 1012 |
|
* |
| 1013 |
|
*---------------------------------------------------------------------- |
| 1014 |
|
*/ |
| 1015 |
|
|
| 1016 |
|
char * |
| 1017 |
|
Tcl_SetVar(interp, varName, newValue, flags) |
| 1018 |
|
Tcl_Interp *interp; /* Command interpreter in which varName is |
| 1019 |
|
* to be looked up. */ |
| 1020 |
|
char *varName; /* Name of a variable in interp. */ |
| 1021 |
|
char *newValue; /* New value for varName. */ |
| 1022 |
|
int flags; /* Various flags that tell how to set value: |
| 1023 |
|
* any of TCL_GLOBAL_ONLY, |
| 1024 |
|
* TCL_NAMESPACE_ONLY, TCL_APPEND_VALUE, |
| 1025 |
|
* TCL_LIST_ELEMENT, TCL_LEAVE_ERR_MSG. */ |
| 1026 |
|
{ |
| 1027 |
|
return Tcl_SetVar2(interp, varName, (char *) NULL, newValue, flags); |
| 1028 |
|
} |
| 1029 |
|
|
| 1030 |
|
/* |
| 1031 |
|
*---------------------------------------------------------------------- |
| 1032 |
|
* |
| 1033 |
|
* Tcl_SetVar2 -- |
| 1034 |
|
* |
| 1035 |
|
* Given a two-part variable name, which may refer either to a |
| 1036 |
|
* scalar variable or an element of an array, change the value |
| 1037 |
|
* of the variable. If the named scalar or array or element |
| 1038 |
|
* doesn't exist then create one. |
| 1039 |
|
* |
| 1040 |
|
* Results: |
| 1041 |
|
* Returns a pointer to the malloc'ed string which is the character |
| 1042 |
|
* representation of the variable's new value. The caller must not |
| 1043 |
|
* modify this string. If the write operation was disallowed because an |
| 1044 |
|
* array was expected but not found (or vice versa), then NULL is |
| 1045 |
|
* returned; if the TCL_LEAVE_ERR_MSG flag is set, then an explanatory |
| 1046 |
|
* message will be left in the interp's result. Note that the returned |
| 1047 |
|
* string may not be the same as newValue; this is because variable |
| 1048 |
|
* traces may modify the variable's value. |
| 1049 |
|
* |
| 1050 |
|
* Side effects: |
| 1051 |
|
* The value of the given variable is set. If either the array |
| 1052 |
|
* or the entry didn't exist then a new one is created. |
| 1053 |
|
* |
| 1054 |
|
*---------------------------------------------------------------------- |
| 1055 |
|
*/ |
| 1056 |
|
|
| 1057 |
|
char * |
| 1058 |
|
Tcl_SetVar2(interp, part1, part2, newValue, flags) |
| 1059 |
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
| 1060 |
|
* to be looked up. */ |
| 1061 |
|
char *part1; /* If part2 is NULL, this is name of scalar |
| 1062 |
|
* variable. Otherwise it is the name of |
| 1063 |
|
* an array. */ |
| 1064 |
|
char *part2; /* Name of an element within an array, or |
| 1065 |
|
* NULL. */ |
| 1066 |
|
char *newValue; /* New value for variable. */ |
| 1067 |
|
int flags; /* Various flags that tell how to set value: |
| 1068 |
|
* any of TCL_GLOBAL_ONLY, |
| 1069 |
|
* TCL_NAMESPACE_ONLY, TCL_APPEND_VALUE, |
| 1070 |
|
* TCL_LIST_ELEMENT, or TCL_LEAVE_ERR_MSG */ |
| 1071 |
|
{ |
| 1072 |
|
register Tcl_Obj *valuePtr; |
| 1073 |
|
Tcl_Obj *varValuePtr; |
| 1074 |
|
|
| 1075 |
|
/* |
| 1076 |
|
* Create an object holding the variable's new value and use |
| 1077 |
|
* Tcl_SetVar2Ex to actually set the variable. |
| 1078 |
|
*/ |
| 1079 |
|
|
| 1080 |
|
valuePtr = Tcl_NewStringObj(newValue, -1); |
| 1081 |
|
Tcl_IncrRefCount(valuePtr); |
| 1082 |
|
|
| 1083 |
|
varValuePtr = Tcl_SetVar2Ex(interp, part1, part2, valuePtr, flags); |
| 1084 |
|
Tcl_DecrRefCount(valuePtr); /* done with the object */ |
| 1085 |
|
|
| 1086 |
|
if (varValuePtr == NULL) { |
| 1087 |
|
return NULL; |
| 1088 |
|
} |
| 1089 |
|
return TclGetString(varValuePtr); |
| 1090 |
|
} |
| 1091 |
|
|
| 1092 |
|
/* |
| 1093 |
|
*---------------------------------------------------------------------- |
| 1094 |
|
* |
| 1095 |
|
* Tcl_ObjSetVar2 -- |
| 1096 |
|
* |
| 1097 |
|
* This function is the same as Tcl_SetVar2Ex below, except the |
| 1098 |
|
* variable names are passed in Tcl object instead of strings. |
| 1099 |
|
* |
| 1100 |
|
* Results: |
| 1101 |
|
* Returns a pointer to the Tcl_Obj holding the new value of the |
| 1102 |
|
* variable. If the write operation was disallowed because an array was |
| 1103 |
|
* expected but not found (or vice versa), then NULL is returned; if |
| 1104 |
|
* the TCL_LEAVE_ERR_MSG flag is set, then an explanatory message will |
| 1105 |
|
* be left in the interpreter's result. Note that the returned object |
| 1106 |
|
* may not be the same one referenced by newValuePtr; this is because |
| 1107 |
|
* variable traces may modify the variable's value. |
| 1108 |
|
* |
| 1109 |
|
* Side effects: |
| 1110 |
|
* The value of the given variable is set. If either the array or the |
| 1111 |
|
* entry didn't exist then a new variable is created. |
| 1112 |
|
|
| 1113 |
|
* |
| 1114 |
|
*---------------------------------------------------------------------- |
| 1115 |
|
*/ |
| 1116 |
|
|
| 1117 |
|
Tcl_Obj * |
| 1118 |
|
Tcl_ObjSetVar2(interp, part1Ptr, part2Ptr, newValuePtr, flags) |
| 1119 |
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
| 1120 |
|
* to be found. */ |
| 1121 |
|
register Tcl_Obj *part1Ptr; /* Points to an object holding the name of |
| 1122 |
|
* an array (if part2 is non-NULL) or the |
| 1123 |
|
* name of a variable. */ |
| 1124 |
|
register Tcl_Obj *part2Ptr; /* If non-null, points to an object holding |
| 1125 |
|
* the name of an element in the array |
| 1126 |
|
* part1Ptr. */ |
| 1127 |
|
Tcl_Obj *newValuePtr; /* New value for variable. */ |
| 1128 |
|
int flags; /* Various flags that tell how to set value: |
| 1129 |
|
* any of TCL_GLOBAL_ONLY, |
| 1130 |
|
* TCL_NAMESPACE_ONLY, TCL_APPEND_VALUE, |
| 1131 |
|
* TCL_LIST_ELEMENT, TCL_LEAVE_ERR_MSG, or |
| 1132 |
|
* TCL_PARSE_PART1. */ |
| 1133 |
|
{ |
| 1134 |
|
char *part1, *part2; |
| 1135 |
|
|
| 1136 |
|
part1 = Tcl_GetString(part1Ptr); |
| 1137 |
|
if (part2Ptr != NULL) { |
| 1138 |
|
part2 = Tcl_GetString(part2Ptr); |
| 1139 |
|
} else { |
| 1140 |
|
part2 = NULL; |
| 1141 |
|
} |
| 1142 |
|
|
| 1143 |
|
return Tcl_SetVar2Ex(interp, part1, part2, newValuePtr, flags); |
| 1144 |
|
} |
| 1145 |
|
|
| 1146 |
|
/* |
| 1147 |
|
*---------------------------------------------------------------------- |
| 1148 |
|
* |
| 1149 |
|
* Tcl_SetVar2Ex -- |
| 1150 |
|
* |
| 1151 |
|
* Given a two-part variable name, which may refer either to a scalar |
| 1152 |
|
* variable or an element of an array, change the value of the variable |
| 1153 |
|
* to a new Tcl object value. If the named scalar or array or element |
| 1154 |
|
* doesn't exist then create one. |
| 1155 |
|
* |
| 1156 |
|
* Results: |
| 1157 |
|
* Returns a pointer to the Tcl_Obj holding the new value of the |
| 1158 |
|
* variable. If the write operation was disallowed because an array was |
| 1159 |
|
* expected but not found (or vice versa), then NULL is returned; if |
| 1160 |
|
* the TCL_LEAVE_ERR_MSG flag is set, then an explanatory message will |
| 1161 |
|
* be left in the interpreter's result. Note that the returned object |
| 1162 |
|
* may not be the same one referenced by newValuePtr; this is because |
| 1163 |
|
* variable traces may modify the variable's value. |
| 1164 |
|
* |
| 1165 |
|
* Side effects: |
| 1166 |
|
* The value of the given variable is set. If either the array or the |
| 1167 |
|
* entry didn't exist then a new variable is created. |
| 1168 |
|
* |
| 1169 |
|
* The reference count is decremented for any old value of the variable |
| 1170 |
|
* and incremented for its new value. If the new value for the variable |
| 1171 |
|
* is not the same one referenced by newValuePtr (perhaps as a result |
| 1172 |
|
* of a variable trace), then newValuePtr's ref count is left unchanged |
| 1173 |
|
* by Tcl_SetVar2Ex. newValuePtr's ref count is also left unchanged if |
| 1174 |
|
* we are appending it as a string value: that is, if "flags" includes |
| 1175 |
|
* TCL_APPEND_VALUE but not TCL_LIST_ELEMENT. |
| 1176 |
|
* |
| 1177 |
|
* The reference count for the returned object is _not_ incremented: if |
| 1178 |
|
* you want to keep a reference to the object you must increment its |
| 1179 |
|
* ref count yourself. |
| 1180 |
|
* |
| 1181 |
|
*---------------------------------------------------------------------- |
| 1182 |
|
*/ |
| 1183 |
|
|
| 1184 |
|
Tcl_Obj * |
| 1185 |
|
Tcl_SetVar2Ex(interp, part1, part2, newValuePtr, flags) |
| 1186 |
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
| 1187 |
|
* to be found. */ |
| 1188 |
|
char *part1; /* Name of an array (if part2 is non-NULL) |
| 1189 |
|
* or the name of a variable. */ |
| 1190 |
|
char *part2; /* If non-NULL, gives the name of an element |
| 1191 |
|
* in the array part1. */ |
| 1192 |
|
Tcl_Obj *newValuePtr; /* New value for variable. */ |
| 1193 |
|
int flags; /* Various flags that tell how to set value: |
| 1194 |
|
* any of TCL_GLOBAL_ONLY, |
| 1195 |
|
* TCL_NAMESPACE_ONLY, TCL_APPEND_VALUE, |
| 1196 |
|
* TCL_LIST_ELEMENT or TCL_LEAVE_ERR_MSG. */ |
| 1197 |
|
{ |
| 1198 |
|
Interp *iPtr = (Interp *) interp; |
| 1199 |
|
register Var *varPtr; |
| 1200 |
|
Var *arrayPtr; |
| 1201 |
|
Tcl_Obj *oldValuePtr; |
| 1202 |
|
Tcl_Obj *resultPtr = NULL; |
| 1203 |
|
char *bytes; |
| 1204 |
|
int length, result; |
| 1205 |
|
|
| 1206 |
|
varPtr = TclLookupVar(interp, part1, part2, flags, "set", |
| 1207 |
|
/*createPart1*/ 1, /*createPart2*/ 1, &arrayPtr); |
| 1208 |
|
if (varPtr == NULL) { |
| 1209 |
|
return NULL; |
| 1210 |
|
} |
| 1211 |
|
|
| 1212 |
|
/* |
| 1213 |
|
* If the variable is in a hashtable and its hPtr field is NULL, then we |
| 1214 |
|
* may have an upvar to an array element where the array was deleted |
| 1215 |
|
* or an upvar to a namespace variable whose namespace was deleted. |
| 1216 |
|
* Generate an error (allowing the variable to be reset would screw up |
| 1217 |
|
* our storage allocation and is meaningless anyway). |
| 1218 |
|
*/ |
| 1219 |
|
|
| 1220 |
|
if ((varPtr->flags & VAR_IN_HASHTABLE) && (varPtr->hPtr == NULL)) { |
| 1221 |
|
if (flags & TCL_LEAVE_ERR_MSG) { |
| 1222 |
|
if (TclIsVarArrayElement(varPtr)) { |
| 1223 |
|
VarErrMsg(interp, part1, part2, "set", danglingElement); |
| 1224 |
|
} else { |
| 1225 |
|
VarErrMsg(interp, part1, part2, "set", danglingVar); |
| 1226 |
|
} |
| 1227 |
|
} |
| 1228 |
|
return NULL; |
| 1229 |
|
} |
| 1230 |
|
|
| 1231 |
|
/* |
| 1232 |
|
* It's an error to try to set an array variable itself. |
| 1233 |
|
*/ |
| 1234 |
|
|
| 1235 |
|
if (TclIsVarArray(varPtr) && !TclIsVarUndefined(varPtr)) { |
| 1236 |
|
if (flags & TCL_LEAVE_ERR_MSG) { |
| 1237 |
|
VarErrMsg(interp, part1, part2, "set", isArray); |
| 1238 |
|
} |
| 1239 |
|
return NULL; |
| 1240 |
|
} |
| 1241 |
|
|
| 1242 |
|
/* |
| 1243 |
|
* At this point, if we were appending, we used to call read traces: we |
| 1244 |
|
* treated append as a read-modify-write. However, it seemed unlikely to |
| 1245 |
|
* us that a real program would be interested in such reads being done |
| 1246 |
|
* during a set operation. |
| 1247 |
|
*/ |
| 1248 |
|
|
| 1249 |
|
/* |
| 1250 |
|
* Set the variable's new value. If appending, append the new value to |
| 1251 |
|
* the variable, either as a list element or as a string. Also, if |
| 1252 |
|
* appending, then if the variable's old value is unshared we can modify |
| 1253 |
|
* it directly, otherwise we must create a new copy to modify: this is |
| 1254 |
|
* "copy on write". |
| 1255 |
|
*/ |
| 1256 |
|
|
| 1257 |
|
oldValuePtr = varPtr->value.objPtr; |
| 1258 |
|
if (flags & TCL_APPEND_VALUE) { |
| 1259 |
|
if (TclIsVarUndefined(varPtr) && (oldValuePtr != NULL)) { |
| 1260 |
|
Tcl_DecrRefCount(oldValuePtr); /* discard old value */ |
| 1261 |
|
varPtr->value.objPtr = NULL; |
| 1262 |
|
oldValuePtr = NULL; |
| 1263 |
|
} |
| 1264 |
|
if (flags & TCL_LIST_ELEMENT) { /* append list element */ |
| 1265 |
|
if (oldValuePtr == NULL) { |
| 1266 |
|
TclNewObj(oldValuePtr); |
| 1267 |
|
varPtr->value.objPtr = oldValuePtr; |
| 1268 |
|
Tcl_IncrRefCount(oldValuePtr); /* since var is referenced */ |
| 1269 |
|
} else if (Tcl_IsShared(oldValuePtr)) { |
| 1270 |
|
varPtr->value.objPtr = Tcl_DuplicateObj(oldValuePtr); |
| 1271 |
|
Tcl_DecrRefCount(oldValuePtr); |
| 1272 |
|
oldValuePtr = varPtr->value.objPtr; |
| 1273 |
|
Tcl_IncrRefCount(oldValuePtr); /* since var is referenced */ |
| 1274 |
|
} |
| 1275 |
|
result = Tcl_ListObjAppendElement(interp, oldValuePtr, |
| 1276 |
|
newValuePtr); |
| 1277 |
|
if (result != TCL_OK) { |
| 1278 |
|
return NULL; |
| 1279 |
|
} |
| 1280 |
|
} else { /* append string */ |
| 1281 |
|
/* |
| 1282 |
|
* We append newValuePtr's bytes but don't change its ref count. |
| 1283 |
|
*/ |
| 1284 |
|
|
| 1285 |
|
bytes = Tcl_GetStringFromObj(newValuePtr, &length); |
| 1286 |
|
if (oldValuePtr == NULL) { |
| 1287 |
|
varPtr->value.objPtr = Tcl_NewStringObj(bytes, length); |
| 1288 |
|
Tcl_IncrRefCount(varPtr->value.objPtr); |
| 1289 |
|
} else { |
| 1290 |
|
if (Tcl_IsShared(oldValuePtr)) { /* append to copy */ |
| 1291 |
|
varPtr->value.objPtr = Tcl_DuplicateObj(oldValuePtr); |
| 1292 |
|
TclDecrRefCount(oldValuePtr); |
| 1293 |
|
oldValuePtr = varPtr->value.objPtr; |
| 1294 |
|
Tcl_IncrRefCount(oldValuePtr); /* since var is ref */ |
| 1295 |
|
} |
| 1296 |
|
Tcl_AppendObjToObj(oldValuePtr, newValuePtr); |
| 1297 |
|
} |
| 1298 |
|
} |
| 1299 |
|
} else { |
| 1300 |
|
if (flags & TCL_LIST_ELEMENT) { /* set var to list element */ |
| 1301 |
|
int neededBytes, listFlags; |
| 1302 |
|
|
| 1303 |
|
/* |
| 1304 |
|
* We set the variable to the result of converting newValuePtr's |
| 1305 |
|
* string rep to a list element. We do not change newValuePtr's |
| 1306 |
|
* ref count. |
| 1307 |
|
*/ |
| 1308 |
|
|
| 1309 |
|
if (oldValuePtr != NULL) { |
| 1310 |
|
Tcl_DecrRefCount(oldValuePtr); /* discard old value */ |
| 1311 |
|
} |
| 1312 |
|
bytes = Tcl_GetStringFromObj(newValuePtr, &length); |
| 1313 |
|
neededBytes = Tcl_ScanElement(bytes, &listFlags); |
| 1314 |
|
oldValuePtr = Tcl_NewObj(); |
| 1315 |
|
oldValuePtr->bytes = (char *) |
| 1316 |
|
ckalloc((unsigned) (neededBytes + 1)); |
| 1317 |
|
oldValuePtr->length = Tcl_ConvertElement(bytes, |
| 1318 |
|
oldValuePtr->bytes, listFlags); |
| 1319 |
|
varPtr->value.objPtr = oldValuePtr; |
| 1320 |
|
Tcl_IncrRefCount(varPtr->value.objPtr); |
| 1321 |
|
} else if (newValuePtr != oldValuePtr) { |
| 1322 |
|
varPtr->value.objPtr = newValuePtr; |
| 1323 |
|
Tcl_IncrRefCount(newValuePtr); /* var is another ref */ |
| 1324 |
|
if (oldValuePtr != NULL) { |
| 1325 |
|
TclDecrRefCount(oldValuePtr); /* discard old value */ |
| 1326 |
|
} |
| 1327 |
|
} |
| 1328 |
|
} |
| 1329 |
|
TclSetVarScalar(varPtr); |
| 1330 |
|
TclClearVarUndefined(varPtr); |
| 1331 |
|
if (arrayPtr != NULL) { |
| 1332 |
|
TclClearVarUndefined(arrayPtr); |
| 1333 |
|
} |
| 1334 |
|
|
| 1335 |
|
/* |
| 1336 |
|
* Invoke any write traces for the variable. |
| 1337 |
|
*/ |
| 1338 |
|
|
| 1339 |
|
if ((varPtr->tracePtr != NULL) |
| 1340 |
|
|| ((arrayPtr != NULL) && (arrayPtr->tracePtr != NULL))) { |
| 1341 |
|
char *msg = CallTraces(iPtr, arrayPtr, varPtr, part1, part2, |
| 1342 |
|
(flags & (TCL_GLOBAL_ONLY|TCL_NAMESPACE_ONLY)) | TCL_TRACE_WRITES); |
| 1343 |
|
if (msg != NULL) { |
| 1344 |
|
if (flags & TCL_LEAVE_ERR_MSG) { |
| 1345 |
|
VarErrMsg(interp, part1, part2, "set", msg); |
| 1346 |
|
} |
| 1347 |
|
goto cleanup; |
| 1348 |
|
} |
| 1349 |
|
} |
| 1350 |
|
|
| 1351 |
|
/* |
| 1352 |
|
* Return the variable's value unless the variable was changed in some |
| 1353 |
|
* gross way by a trace (e.g. it was unset and then recreated as an |
| 1354 |
|
* array). |
| 1355 |
|
*/ |
| 1356 |
|
|
| 1357 |
|
if (TclIsVarScalar(varPtr) && !TclIsVarUndefined(varPtr)) { |
| 1358 |
|
return varPtr->value.objPtr; |
| 1359 |
|
} |
| 1360 |
|
|
| 1361 |
|
/* |
| 1362 |
|
* A trace changed the value in some gross way. Return an empty string |
| 1363 |
|
* object. |
| 1364 |
|
*/ |
| 1365 |
|
|
| 1366 |
|
resultPtr = iPtr->emptyObjPtr; |
| 1367 |
|
|
| 1368 |
|
/* |
| 1369 |
|
* If the variable doesn't exist anymore and no-one's using it, then |
| 1370 |
|
* free up the relevant structures and hash table entries. |
| 1371 |
|
*/ |
| 1372 |
|
|
| 1373 |
|
cleanup: |
| 1374 |
|
if (TclIsVarUndefined(varPtr)) { |
| 1375 |
|
CleanupVar(varPtr, arrayPtr); |
| 1376 |
|
} |
| 1377 |
|
return resultPtr; |
| 1378 |
|
} |
| 1379 |
|
|
| 1380 |
|
/* |
| 1381 |
|
*---------------------------------------------------------------------- |
| 1382 |
|
* |
| 1383 |
|
* TclSetIndexedScalar -- |
| 1384 |
|
* |
| 1385 |
|
* Change the Tcl object value of a local scalar variable in the active |
| 1386 |
|
* procedure, given its compile-time allocated index in the procedure's |
| 1387 |
|
* array of local variables. |
| 1388 |
|
* |
| 1389 |
|
* Results: |
| 1390 |
|
* Returns a pointer to the Tcl_Obj holding the new value of the |
| 1391 |
|
* variable given by localIndex. If the specified variable doesn't |
| 1392 |
|
* exist, or there is a clash in array usage, or an error occurs while |
| 1393 |
|
* executing variable traces, then NULL is returned and a message will |
| 1394 |
|
* be left in the interpreter's result if leaveErrorMsg is 1. Note |
| 1395 |
|
* that the returned object may not be the same one referenced by |
| 1396 |
|
* newValuePtr; this is because variable traces may modify the |
| 1397 |
|
* variable's value. |
| 1398 |
|
* |
| 1399 |
|
* Side effects: |
| 1400 |
|
* The value of the given variable is set. The reference count is |
| 1401 |
|
* decremented for any old value of the variable and incremented for |
| 1402 |
|
* its new value. If as a result of a variable trace the new value for |
| 1403 |
|
* the variable is not the same one referenced by newValuePtr, then |
| 1404 |
|
* newValuePtr's ref count is left unchanged. The ref count for the |
| 1405 |
|
* returned object is _not_ incremented to reflect the returned |
| 1406 |
|
* reference; if you want to keep a reference to the object you must |
| 1407 |
|
* increment its ref count yourself. This procedure does not create |
| 1408 |
|
* new variables, but only sets those recognized at compile time. |
| 1409 |
|
* |
| 1410 |
|
*---------------------------------------------------------------------- |
| 1411 |
|
*/ |
| 1412 |
|
|
| 1413 |
|
Tcl_Obj * |
| 1414 |
|
TclSetIndexedScalar(interp, localIndex, newValuePtr, leaveErrorMsg) |
| 1415 |
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
| 1416 |
|
* to be found. */ |
| 1417 |
|
int localIndex; /* Index of variable in procedure's array |
| 1418 |
|
* of local variables. */ |
| 1419 |
|
Tcl_Obj *newValuePtr; /* New value for variable. */ |
| 1420 |
|
int leaveErrorMsg; /* 1 if to leave an error message in |
| 1421 |
|
* the interpreter's result on an error. |
| 1422 |
|
* Otherwise no error message is left. */ |
| 1423 |
|
{ |
| 1424 |
|
Interp *iPtr = (Interp *) interp; |
| 1425 |
|
CallFrame *varFramePtr = iPtr->varFramePtr; |
| 1426 |
|
/* Points to the procedure call frame whose |
| 1427 |
|
* variables are currently in use. Same as |
| 1428 |
|
* the current procedure's frame, if any, |
| 1429 |
|
* unless an "uplevel" is executing. */ |
| 1430 |
|
Var *compiledLocals = varFramePtr->compiledLocals; |
| 1431 |
|
register Var *varPtr; /* Points to the variable's in-frame Var |
| 1432 |
|
* structure. */ |
| 1433 |
|
char *varName; /* Name of the local variable. */ |
| 1434 |
|
Tcl_Obj *oldValuePtr; |
| 1435 |
|
Tcl_Obj *resultPtr = NULL; |
| 1436 |
|
|
| 1437 |
|
#ifdef TCL_COMPILE_DEBUG |
| 1438 |
|
Proc *procPtr = varFramePtr->procPtr; |
| 1439 |
|
int localCt = procPtr->numCompiledLocals; |
| 1440 |
|
|
| 1441 |
|
if (compiledLocals == NULL) { |
| 1442 |
|
fprintf(stderr, "\nTclSetIndexedScalar: can't set local %i in frame 0x%x, no compiled locals\n", |
| 1443 |
|
localIndex, (unsigned int) varFramePtr); |
| 1444 |
|
panic("TclSetIndexedScalar: no compiled locals in frame 0x%x", |
| 1445 |
|
(unsigned int) varFramePtr); |
| 1446 |
|
} |
| 1447 |
|
if ((localIndex < 0) || (localIndex >= localCt)) { |
| 1448 |
|
fprintf(stderr, "\nTclSetIndexedScalar: can't set local %i in frame 0x%x with %i locals\n", |
| 1449 |
|
localIndex, (unsigned int) varFramePtr, localCt); |
| 1450 |
|
panic("TclSetIndexedScalar: bad local index %i in frame 0x%x", |
| 1451 |
|
localIndex, (unsigned int) varFramePtr); |
| 1452 |
|
} |
| 1453 |
|
#endif /* TCL_COMPILE_DEBUG */ |
| 1454 |
|
|
| 1455 |
|
varPtr = &(compiledLocals[localIndex]); |
| 1456 |
|
varName = varPtr->name; |
| 1457 |
|
|
| 1458 |
|
/* |
| 1459 |
|
* If varPtr is a link variable, we have a reference to some variable |
| 1460 |
|
* that was created through an "upvar" or "global" command, or we have a |
| 1461 |
|
* reference to a variable in an enclosing namespace. Traverse through |
| 1462 |
|
* any links until we find the referenced variable. |
| 1463 |
|
*/ |
| 1464 |
|
|
| 1465 |
|
while (TclIsVarLink(varPtr)) { |
| 1466 |
|
varPtr = varPtr->value.linkPtr; |
| 1467 |
|
} |
| 1468 |
|
|
| 1469 |
|
/* |
| 1470 |
|
* If the variable is in a hashtable and its hPtr field is NULL, then we |
| 1471 |
|
* may have an upvar to an array element where the array was deleted |
| 1472 |
|
* or an upvar to a namespace variable whose namespace was deleted. |
| 1473 |
|
* Generate an error (allowing the variable to be reset would screw up |
| 1474 |
|
* our storage allocation and is meaningless anyway). |
| 1475 |
|
*/ |
| 1476 |
|
|
| 1477 |
|
if ((varPtr->flags & VAR_IN_HASHTABLE) && (varPtr->hPtr == NULL)) { |
| 1478 |
|
if (leaveErrorMsg) { |
| 1479 |
|
if (TclIsVarArrayElement(varPtr)) { |
| 1480 |
|
VarErrMsg(interp, varName, NULL, "set", danglingElement); |
| 1481 |
|
} else { |
| 1482 |
|
VarErrMsg(interp, varName, NULL, "set", danglingVar); |
| 1483 |
|
} |
| 1484 |
|
} |
| 1485 |
|
return NULL; |
| 1486 |
|
} |
| 1487 |
|
|
| 1488 |
|
/* |
| 1489 |
|
* It's an error to try to set an array variable itself. |
| 1490 |
|
*/ |
| 1491 |
|
|
| 1492 |
|
if (TclIsVarArray(varPtr) && !TclIsVarUndefined(varPtr)) { |
| 1493 |
|
if (leaveErrorMsg) { |
| 1494 |
|
VarErrMsg(interp, varName, NULL, "set", isArray); |
| 1495 |
|
} |
| 1496 |
|
return NULL; |
| 1497 |
|
} |
| 1498 |
|
|
| 1499 |
|
/* |
| 1500 |
|
* Set the variable's new value and discard its old value. We don't |
| 1501 |
|
* append with this "set" procedure so the old value isn't needed. |
| 1502 |
|
*/ |
| 1503 |
|
|
| 1504 |
|
oldValuePtr = varPtr->value.objPtr; |
| 1505 |
|
if (newValuePtr != oldValuePtr) { /* set new value */ |
| 1506 |
|
varPtr->value.objPtr = newValuePtr; |
| 1507 |
|
Tcl_IncrRefCount(newValuePtr); /* var is another ref to obj */ |
| 1508 |
|
if (oldValuePtr != NULL) { |
| 1509 |
|
TclDecrRefCount(oldValuePtr); /* discard old value */ |
| 1510 |
|
} |
| 1511 |
|
} |
| 1512 |
|
TclSetVarScalar(varPtr); |
| 1513 |
|
TclClearVarUndefined(varPtr); |
| 1514 |
|
|
| 1515 |
|
/* |
| 1516 |
|
* Invoke any write traces for the variable. |
| 1517 |
|
*/ |
| 1518 |
|
|
| 1519 |
|
if (varPtr->tracePtr != NULL) { |
| 1520 |
|
char *msg = CallTraces(iPtr, /*arrayPtr*/ NULL, varPtr, |
| 1521 |
|
varName, (char *) NULL, TCL_TRACE_WRITES); |
| 1522 |
|
if (msg != NULL) { |
| 1523 |
|
if (leaveErrorMsg) { |
| 1524 |
|
VarErrMsg(interp, varName, NULL, "set", msg); |
| 1525 |
|
} |
| 1526 |
|
goto cleanup; |
| 1527 |
|
} |
| 1528 |
|
} |
| 1529 |
|
|
| 1530 |
|
/* |
| 1531 |
|
* Return the variable's value unless the variable was changed in some |
| 1532 |
|
* gross way by a trace (e.g. it was unset and then recreated as an |
| 1533 |
|
* array). If it was changed is a gross way, just return an empty string |
| 1534 |
|
* object. |
| 1535 |
|
*/ |
| 1536 |
|
|
| 1537 |
|
if (TclIsVarScalar(varPtr) && !TclIsVarUndefined(varPtr)) { |
| 1538 |
|
return varPtr->value.objPtr; |
| 1539 |
|
} |
| 1540 |
|
|
| 1541 |
|
resultPtr = Tcl_NewObj(); |
| 1542 |
|
|
| 1543 |
|
/* |
| 1544 |
|
* If the variable doesn't exist anymore and no-one's using it, then |
| 1545 |
|
* free up the relevant structures and hash table entries. |
| 1546 |
|
*/ |
| 1547 |
|
|
| 1548 |
|
cleanup: |
| 1549 |
|
if (TclIsVarUndefined(varPtr)) { |
| 1550 |
|
CleanupVar(varPtr, NULL); |
| 1551 |
|
} |
| 1552 |
|
return resultPtr; |
| 1553 |
|
} |
| 1554 |
|
|
| 1555 |
|
/* |
| 1556 |
|
*---------------------------------------------------------------------- |
| 1557 |
|
* |
| 1558 |
|
* TclSetElementOfIndexedArray -- |
| 1559 |
|
* |
| 1560 |
|
* Change the Tcl object value of an element in a local array |
| 1561 |
|
* variable. The element is named by the object elemPtr while the array |
| 1562 |
|
* is specified by its index in the active procedure's array of |
| 1563 |
|
* compiler allocated local variables. |
| 1564 |
|
* |
| 1565 |
|
* Results: |
| 1566 |
|
* Returns a pointer to the Tcl_Obj holding the new value of the |
| 1567 |
|
* element. If the specified array or element doesn't exist, or there |
| 1568 |
|
* is a clash in array usage, or an error occurs while executing |
| 1569 |
|
* variable traces, then NULL is returned and a message will be left in |
| 1570 |
|
* the interpreter's result if leaveErrorMsg is 1. Note that the |
| 1571 |
|
* returned object may not be the same one referenced by newValuePtr; |
| 1572 |
|
* this is because variable traces may modify the variable's value. |
| 1573 |
|
* |
| 1574 |
|
* Side effects: |
| 1575 |
|
* The value of the given array element is set. The reference count is |
| 1576 |
|
* decremented for any old value of the element and incremented for its |
| 1577 |
|
* new value. If as a result of a variable trace the new value for the |
| 1578 |
|
* element is not the same one referenced by newValuePtr, then |
| 1579 |
|
* newValuePtr's ref count is left unchanged. The ref count for the |
| 1580 |
|
* returned object is _not_ incremented to reflect the returned |
| 1581 |
|
* reference; if you want to keep a reference to the object you must |
| 1582 |
|
* increment its ref count yourself. This procedure will not create new |
| 1583 |
|
* array variables, but only sets elements of those arrays recognized |
| 1584 |
|
* at compile time. However, if the entry doesn't exist then a new |
| 1585 |
|
* variable is created. |
| 1586 |
|
* |
| 1587 |
|
*---------------------------------------------------------------------- |
| 1588 |
|
*/ |
| 1589 |
|
|
| 1590 |
|
Tcl_Obj * |
| 1591 |
|
TclSetElementOfIndexedArray(interp, localIndex, elemPtr, newValuePtr, |
| 1592 |
|
leaveErrorMsg) |
| 1593 |
|
Tcl_Interp *interp; /* Command interpreter in which the array is |
| 1594 |
|
* to be found. */ |
| 1595 |
|
int localIndex; /* Index of array variable in procedure's |
| 1596 |
|
* array of local variables. */ |
| 1597 |
|
Tcl_Obj *elemPtr; /* Points to an object holding the name of |
| 1598 |
|
* an element to set in the array. */ |
| 1599 |
|
Tcl_Obj *newValuePtr; /* New value for variable. */ |
| 1600 |
|
int leaveErrorMsg; /* 1 if to leave an error message in |
| 1601 |
|
* the interpreter's result on an error. |
| 1602 |
|
* Otherwise no error message is left. */ |
| 1603 |
|
{ |
| 1604 |
|
Interp *iPtr = (Interp *) interp; |
| 1605 |
|
CallFrame *varFramePtr = iPtr->varFramePtr; |
| 1606 |
|
/* Points to the procedure call frame whose |
| 1607 |
|
* variables are currently in use. Same as |
| 1608 |
|
* the current procedure's frame, if any, |
| 1609 |
|
* unless an "uplevel" is executing. */ |
| 1610 |
|
Var *compiledLocals = varFramePtr->compiledLocals; |
| 1611 |
|
Var *arrayPtr; /* Points to the array's in-frame Var |
| 1612 |
|
* structure. */ |
| 1613 |
|
char *arrayName; /* Name of the local array. */ |
| 1614 |
|
char *elem; |
| 1615 |
|
Tcl_HashEntry *hPtr; |
| 1616 |
|
Var *varPtr = NULL; /* Points to the element's Var structure |
| 1617 |
|
* that we return. */ |
| 1618 |
|
Tcl_Obj *resultPtr = NULL; |
| 1619 |
|
Tcl_Obj *oldValuePtr; |
| 1620 |
|
int new; |
| 1621 |
|
|
| 1622 |
|
#ifdef TCL_COMPILE_DEBUG |
| 1623 |
|
Proc *procPtr = varFramePtr->procPtr; |
| 1624 |
|
int localCt = procPtr->numCompiledLocals; |
| 1625 |
|
|
| 1626 |
|
if (compiledLocals == NULL) { |
| 1627 |
|
fprintf(stderr, "\nTclSetElementOfIndexedArray: can't set element of local %i in frame 0x%x, no compiled locals\n", |
| 1628 |
|
localIndex, (unsigned int) varFramePtr); |
| 1629 |
|
panic("TclSetIndexedScalar: no compiled locals in frame 0x%x", |
| 1630 |
|
(unsigned int) varFramePtr); |
| 1631 |
|
} |
| 1632 |
|
if ((localIndex < 0) || (localIndex >= localCt)) { |
| 1633 |
|
fprintf(stderr, "\nTclSetIndexedScalar: can't set elememt of local %i in frame 0x%x with %i locals\n", |
| 1634 |
|
localIndex, (unsigned int) varFramePtr, localCt); |
| 1635 |
|
panic("TclSetElementOfIndexedArray: bad local index %i in frame 0x%x", |
| 1636 |
|
localIndex, (unsigned int) varFramePtr); |
| 1637 |
|
} |
| 1638 |
|
#endif /* TCL_COMPILE_DEBUG */ |
| 1639 |
|
|
| 1640 |
|
elem = TclGetString(elemPtr); |
| 1641 |
|
arrayPtr = &(compiledLocals[localIndex]); |
| 1642 |
|
arrayName = arrayPtr->name; |
| 1643 |
|
|
| 1644 |
|
/* |
| 1645 |
|
* If arrayPtr is a link variable, we have a reference to some variable |
| 1646 |
|
* that was created through an "upvar" or "global" command, or we have a |
| 1647 |
|
* reference to a variable in an enclosing namespace. Traverse through |
| 1648 |
|
* any links until we find the referenced variable. |
| 1649 |
|
*/ |
| 1650 |
|
|
| 1651 |
|
while (TclIsVarLink(arrayPtr)) { |
| 1652 |
|
arrayPtr = arrayPtr->value.linkPtr; |
| 1653 |
|
} |
| 1654 |
|
|
| 1655 |
|
/* |
| 1656 |
|
* If the variable is in a hashtable and its hPtr field is NULL, then we |
| 1657 |
|
* may have an upvar to an array element where the array was deleted |
| 1658 |
|
* or an upvar to a namespace variable whose namespace was deleted. |
| 1659 |
|
* Generate an error (allowing the variable to be reset would screw up |
| 1660 |
|
* our storage allocation and is meaningless anyway). |
| 1661 |
|
*/ |
| 1662 |
|
|
| 1663 |
|
if ((arrayPtr->flags & VAR_IN_HASHTABLE) && (arrayPtr->hPtr == NULL)) { |
| 1664 |
|
if (leaveErrorMsg) { |
| 1665 |
|
if (TclIsVarArrayElement(arrayPtr)) { |
| 1666 |
|
VarErrMsg(interp, arrayName, elem, "set", danglingElement); |
| 1667 |
|
} else { |
| 1668 |
|
VarErrMsg(interp, arrayName, elem, "set", danglingVar); |
| 1669 |
|
} |
| 1670 |
|
} |
| 1671 |
|
goto errorReturn; |
| 1672 |
|
} |
| 1673 |
|
|
| 1674 |
|
/* |
| 1675 |
|
* Make sure we're dealing with an array. |
| 1676 |
|
*/ |
| 1677 |
|
|
| 1678 |
|
if (TclIsVarUndefined(arrayPtr) && !TclIsVarArrayElement(arrayPtr)) { |
| 1679 |
|
TclSetVarArray(arrayPtr); |
| 1680 |
|
arrayPtr->value.tablePtr = |
| 1681 |
|
(Tcl_HashTable *) ckalloc(sizeof(Tcl_HashTable)); |
| 1682 |
|
Tcl_InitHashTable(arrayPtr->value.tablePtr, TCL_STRING_KEYS); |
| 1683 |
|
TclClearVarUndefined(arrayPtr); |
| 1684 |
|
} else if (!TclIsVarArray(arrayPtr)) { |
| 1685 |
|
if (leaveErrorMsg) { |
| 1686 |
|
VarErrMsg(interp, arrayName, elem, "set", needArray); |
| 1687 |
|
} |
| 1688 |
|
goto errorReturn; |
| 1689 |
|
} |
| 1690 |
|
|
| 1691 |
|
/* |
| 1692 |
|
* Look up the element. |
| 1693 |
|
*/ |
| 1694 |
|
|
| 1695 |
|
hPtr = Tcl_CreateHashEntry(arrayPtr->value.tablePtr, elem, &new); |
| 1696 |
|
if (new) { |
| 1697 |
|
if (arrayPtr->searchPtr != NULL) { |
| 1698 |
|
DeleteSearches(arrayPtr); |
| 1699 |
|
} |
| 1700 |
|
varPtr = NewVar(); |
| 1701 |
|
Tcl_SetHashValue(hPtr, varPtr); |
| 1702 |
|
varPtr->hPtr = hPtr; |
| 1703 |
|
varPtr->nsPtr = varFramePtr->nsPtr; |
| 1704 |
|
TclSetVarArrayElement(varPtr); |
| 1705 |
|
} |
| 1706 |
|
varPtr = (Var *) Tcl_GetHashValue(hPtr); |
| 1707 |
|
|
| 1708 |
|
/* |
| 1709 |
|
* It's an error to try to set an array variable itself. |
| 1710 |
|
*/ |
| 1711 |
|
|
| 1712 |
|
if (TclIsVarArray(varPtr)) { |
| 1713 |
|
if (leaveErrorMsg) { |
| 1714 |
|
VarErrMsg(interp, arrayName, elem, "set", isArray); |
| 1715 |
|
} |
| 1716 |
|
goto errorReturn; |
| 1717 |
|
} |
| 1718 |
|
|
| 1719 |
|
/* |
| 1720 |
|
* Set the variable's new value and discard the old one. We don't |
| 1721 |
|
* append with this "set" procedure so the old value isn't needed. |
| 1722 |
|
*/ |
| 1723 |
|
|
| 1724 |
|
oldValuePtr = varPtr->value.objPtr; |
| 1725 |
|
if (newValuePtr != oldValuePtr) { /* set new value */ |
| 1726 |
|
varPtr->value.objPtr = newValuePtr; |
| 1727 |
|
Tcl_IncrRefCount(newValuePtr); /* var is another ref to obj */ |
| 1728 |
|
if (oldValuePtr != NULL) { |
| 1729 |
|
TclDecrRefCount(oldValuePtr); /* discard old value */ |
| 1730 |
|
} |
| 1731 |
|
} |
| 1732 |
|
TclSetVarScalar(varPtr); |
| 1733 |
|
TclClearVarUndefined(varPtr); |
| 1734 |
|
|
| 1735 |
|
/* |
| 1736 |
|
* Invoke any write traces for the element variable. |
| 1737 |
|
*/ |
| 1738 |
|
|
| 1739 |
|
if ((varPtr->tracePtr != NULL) |
| 1740 |
|
|| ((arrayPtr != NULL) && (arrayPtr->tracePtr != NULL))) { |
| 1741 |
|
char *msg = CallTraces(iPtr, arrayPtr, varPtr, arrayName, elem, |
| 1742 |
|
TCL_TRACE_WRITES); |
| 1743 |
|
if (msg != NULL) { |
| 1744 |
|
if (leaveErrorMsg) { |
| 1745 |
|
VarErrMsg(interp, arrayName, elem, "set", msg); |
| 1746 |
|
} |
| 1747 |
|
goto errorReturn; |
| 1748 |
|
} |
| 1749 |
|
} |
| 1750 |
|
|
| 1751 |
|
/* |
| 1752 |
|
* Return the element's value unless it was changed in some gross way by |
| 1753 |
|
* a trace (e.g. it was unset and then recreated as an array). If it was |
| 1754 |
|
* changed is a gross way, just return an empty string object. |
| 1755 |
|
*/ |
| 1756 |
|
|
| 1757 |
|
if (TclIsVarScalar(varPtr) && !TclIsVarUndefined(varPtr)) { |
| 1758 |
|
return varPtr->value.objPtr; |
| 1759 |
|
} |
| 1760 |
|
|
| 1761 |
|
resultPtr = Tcl_NewObj(); |
| 1762 |
|
|
| 1763 |
|
/* |
| 1764 |
|
* An error. If the variable doesn't exist anymore and no-one's using |
| 1765 |
|
* it, then free up the relevant structures and hash table entries. |
| 1766 |
|
*/ |
| 1767 |
|
|
| 1768 |
|
errorReturn: |
| 1769 |
|
if (varPtr != NULL) { |
| 1770 |
|
if (TclIsVarUndefined(varPtr)) { |
| 1771 |
|
CleanupVar(varPtr, NULL); /* note: array isn't in hashtable */ |
| 1772 |
|
} |
| 1773 |
|
} |
| 1774 |
|
return resultPtr; |
| 1775 |
|
} |
| 1776 |
|
|
| 1777 |
|
/* |
| 1778 |
|
*---------------------------------------------------------------------- |
| 1779 |
|
* |
| 1780 |
|
* TclIncrVar2 -- |
| 1781 |
|
* |
| 1782 |
|
* Given a two-part variable name, which may refer either to a scalar |
| 1783 |
|
* variable or an element of an array, increment the Tcl object value |
| 1784 |
|
* of the variable by a specified amount. |
| 1785 |
|
* |
| 1786 |
|
* Results: |
| 1787 |
|
* Returns a pointer to the Tcl_Obj holding the new value of the |
| 1788 |
|
* variable. If the specified variable doesn't exist, or there is a |
| 1789 |
|
* clash in array usage, or an error occurs while executing variable |
| 1790 |
|
* traces, then NULL is returned and a message will be left in |
| 1791 |
|
* the interpreter's result. |
| 1792 |
|
* |
| 1793 |
|
* Side effects: |
| 1794 |
|
* The value of the given variable is incremented by the specified |
| 1795 |
|
* amount. If either the array or the entry didn't exist then a new |
| 1796 |
|
* variable is created. The ref count for the returned object is _not_ |
| 1797 |
|
* incremented to reflect the returned reference; if you want to keep a |
| 1798 |
|
* reference to the object you must increment its ref count yourself. |
| 1799 |
|
* |
| 1800 |
|
*---------------------------------------------------------------------- |
| 1801 |
|
*/ |
| 1802 |
|
|
| 1803 |
|
Tcl_Obj * |
| 1804 |
|
TclIncrVar2(interp, part1Ptr, part2Ptr, incrAmount, flags) |
| 1805 |
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
| 1806 |
|
* to be found. */ |
| 1807 |
|
Tcl_Obj *part1Ptr; /* Points to an object holding the name of |
| 1808 |
|
* an array (if part2 is non-NULL) or the |
| 1809 |
|
* name of a variable. */ |
| 1810 |
|
Tcl_Obj *part2Ptr; /* If non-null, points to an object holding |
| 1811 |
|
* the name of an element in the array |
| 1812 |
|
* part1Ptr. */ |
| 1813 |
|
long incrAmount; /* Amount to be added to variable. */ |
| 1814 |
|
int flags; /* Various flags that tell how to incr value: |
| 1815 |
|
* any of TCL_GLOBAL_ONLY, |
| 1816 |
|
* TCL_NAMESPACE_ONLY, TCL_APPEND_VALUE, |
| 1817 |
|
* TCL_LIST_ELEMENT, TCL_LEAVE_ERR_MSG. */ |
| 1818 |
|
{ |
| 1819 |
|
register Tcl_Obj *varValuePtr; |
| 1820 |
|
Tcl_Obj *resultPtr; |
| 1821 |
|
int createdNewObj; /* Set 1 if var's value object is shared |
| 1822 |
|
* so we must increment a copy (i.e. copy |
| 1823 |
|
* on write). */ |
| 1824 |
|
long i; |
| 1825 |
|
int result; |
| 1826 |
|
|
| 1827 |
|
varValuePtr = Tcl_ObjGetVar2(interp, part1Ptr, part2Ptr, flags); |
| 1828 |
|
if (varValuePtr == NULL) { |
| 1829 |
|
Tcl_AddObjErrorInfo(interp, |
| 1830 |
|
"\n (reading value of variable to increment)", -1); |
| 1831 |
|
return NULL; |
| 1832 |
|
} |
| 1833 |
|
|
| 1834 |
|
/* |
| 1835 |
|
* Increment the variable's value. If the object is unshared we can |
| 1836 |
|
* modify it directly, otherwise we must create a new copy to modify: |
| 1837 |
|
* this is "copy on write". Then free the variable's old string |
| 1838 |
|
* representation, if any, since it will no longer be valid. |
| 1839 |
|
*/ |
| 1840 |
|
|
| 1841 |
|
createdNewObj = 0; |
| 1842 |
|
if (Tcl_IsShared(varValuePtr)) { |
| 1843 |
|
varValuePtr = Tcl_DuplicateObj(varValuePtr); |
| 1844 |
|
createdNewObj = 1; |
| 1845 |
|
} |
| 1846 |
|
result = Tcl_GetLongFromObj(interp, varValuePtr, &i); |
| 1847 |
|
if (result != TCL_OK) { |
| 1848 |
|
if (createdNewObj) { |
| 1849 |
|
Tcl_DecrRefCount(varValuePtr); /* free unneeded copy */ |
| 1850 |
|
} |
| 1851 |
|
return NULL; |
| 1852 |
|
} |
| 1853 |
|
Tcl_SetLongObj(varValuePtr, (i + incrAmount)); |
| 1854 |
|
|
| 1855 |
|
/* |
| 1856 |
|
* Store the variable's new value and run any write traces. |
| 1857 |
|
*/ |
| 1858 |
|
|
| 1859 |
|
resultPtr = Tcl_ObjSetVar2(interp, part1Ptr, part2Ptr, varValuePtr, flags); |
| 1860 |
|
if (resultPtr == NULL) { |
| 1861 |
|
return NULL; |
| 1862 |
|
} |
| 1863 |
|
return resultPtr; |
| 1864 |
|
} |
| 1865 |
|
|
| 1866 |
|
/* |
| 1867 |
|
*---------------------------------------------------------------------- |
| 1868 |
|
* |
| 1869 |
|
* TclIncrIndexedScalar -- |
| 1870 |
|
* |
| 1871 |
|
* Increments the Tcl object value of a local scalar variable in the |
| 1872 |
|
* active procedure, given its compile-time allocated index in the |
| 1873 |
|
* procedure's array of local variables. |
| 1874 |
|
* |
| 1875 |
|
* Results: |
| 1876 |
|
* Returns a pointer to the Tcl_Obj holding the new value of the |
| 1877 |
|
* variable given by localIndex. If the specified variable doesn't |
| 1878 |
|
* exist, or there is a clash in array usage, or an error occurs while |
| 1879 |
|
* executing variable traces, then NULL is returned and a message will |
| 1880 |
|
* be left in the interpreter's result. |
| 1881 |
|
* |
| 1882 |
|
* Side effects: |
| 1883 |
|
* The value of the given variable is incremented by the specified |
| 1884 |
|
* amount. The ref count for the returned object is _not_ incremented |
| 1885 |
|
* to reflect the returned reference; if you want to keep a reference |
| 1886 |
|
* to the object you must increment its ref count yourself. |
| 1887 |
|
* |
| 1888 |
|
*---------------------------------------------------------------------- |
| 1889 |
|
*/ |
| 1890 |
|
|
| 1891 |
|
Tcl_Obj * |
| 1892 |
|
TclIncrIndexedScalar(interp, localIndex, incrAmount) |
| 1893 |
|
Tcl_Interp *interp; /* Command interpreter in which variable is |
| 1894 |
|
* to be found. */ |
| 1895 |
|
int localIndex; /* Index of variable in procedure's array |
| 1896 |
|
* of local variables. */ |
| 1897 |
|
long incrAmount; /* Amount to be added to variable. */ |
| 1898 |
|
{ |
| 1899 |
|
register Tcl_Obj *varValuePtr; |
| 1900 |
|
Tcl_Obj *resultPtr; |
| 1901 |
|
int createdNewObj; /* Set 1 if var's value object is shared |
| 1902 |
|
* so we must increment a copy (i.e. copy |
| 1903 |
|
* on write). */ |
| 1904 |
|
long i; |
| 1905 |
|
int result; |
| 1906 |
|
|
| 1907 |
|
varValuePtr = TclGetIndexedScalar(interp, localIndex, |
| 1908 |
|
/*leaveErrorMsg*/ 1); |
| 1909 |
|
if (varValuePtr == NULL) { |
| 1910 |
|
Tcl_AddObjErrorInfo(interp, |
| 1911 |
|
"\n (reading value of variable to increment)", -1); |
| 1912 |
|
return NULL; |
| 1913 |
|
} |
| 1914 |
|
|
| 1915 |
|
/* |
| 1916 |
|
* Reach into the object's representation to extract and increment the |
| 1917 |
|
* variable's value. If the object is unshared we can modify it |
| 1918 |
|
* directly, otherwise we must create a new copy to modify: this is |
| 1919 |
|
* "copy on write". Then free the variable's old string representation, |
| 1920 |
|
* if any, since it will no longer be valid. |
| 1921 |
|
*/ |
| 1922 |
|
|
| 1923 |
|
createdNewObj = 0; |
| 1924 |
|
if (Tcl_IsShared(varValuePtr)) { |
| 1925 |
|
createdNewObj = 1; |
| 1926 |
|
varValuePtr = Tcl_DuplicateObj(varValuePtr); |
| 1927 |
|
} |
| 1928 |
|
result = Tcl_GetLongFromObj(interp, varValuePtr, &i); |
| 1929 |
|
if (result != TCL_OK) { |
| 1930 |
|
if (createdNewObj) { |
| 1931 |
|
Tcl_DecrRefCount(varValuePtr); /* free unneeded copy */ |
| 1932 |
|
} |
| 1933 |
|
return NULL; |
| 1934 |
|
} |
| 1935 |
|
Tcl_SetLongObj(varValuePtr, (i + incrAmount)); |
| 1936 |
|
|
| 1937 |
|
/* |
| 1938 |
|
* Store the variable's new value and run any write traces. |
| 1939 |
|
*/ |
| 1940 |
|
|
| 1941 |
|
resultPtr = TclSetIndexedScalar(interp, localIndex, varValuePtr, |
| 1942 |
|
/*leaveErrorMsg*/ 1); |
| 1943 |
|
if (resultPtr == NULL) { |
| 1944 |
|
return NULL; |
| 1945 |
|
} |
| 1946 |
|
return resultPtr; |
| 1947 |
|
} |
| 1948 |
|
|
| 1949 |
|
/* |
| 1950 |
|
*---------------------------------------------------------------------- |
| 1951 |
|
* |
| 1952 |
|
* TclIncrElementOfIndexedArray -- |
| 1953 |
|
* |
| 1954 |
|
* Increments the Tcl object value of an element in a local array |
| 1955 |
|
* variable. The element is named by the object elemPtr while the array |
| 1956 |
|
* is specified by its index in the active procedure's array of |
| 1957 |
|
* compiler allocated local variables. |
| 1958 |
|
* |
| 1959 |
|
* Results: |
| 1960 |
|
* Returns a pointer to the Tcl_Obj holding the new value of the |
| 1961 |
|
* element. If the specified array or element doesn't exist, or there |
| 1962 |
|
* is a clash in array usage, or an error occurs while executing |
| 1963 |
|
* variable traces, then NULL is returned and a message will be left in |
| 1964 |
|
* the interpreter's result. |
| 1965 |
|
* |
| 1966 |
|
* Side effects: |
| 1967 |
|
* The value of the given array element is incremented by the specified |
| 1968 |
|
* amount. The ref count for the returned object is _not_ incremented |
| 1969 |
|
* to reflect the returned reference; if you want to keep a reference |
| 1970 |
|
* to the object you must increment its ref count yourself. If the |
| 1971 |
|
* entry doesn't exist then a new variable is created. |
| 1972 |
|
* |
| 1973 |
|
*---------------------------------------------------------------------- |
| 1974 |
|
*/ |
| 1975 |
|
|
| 1976 |
|
Tcl_Obj * |
| 1977 |
|
TclIncrElementOfIndexedArray(interp, localIndex, elemPtr, incrAmount) |
| 1978 |
|
Tcl_Interp *interp; /* Command interpreter in which the array is |
| 1979 |
|
* to be found. */ |
| 1980 |
|
int localIndex; /* Index of array variable in procedure's |
| 1981 |
|
* array of local variables. */ |
| 1982 |
|
Tcl_Obj *elemPtr; /* Points to an object holding the name of |
| 1983 |
|
* an element to increment in the array. */ |
| 1984 |
|
long incrAmount; /* Amount to be added to variable. */ |
| 1985 |
|
{ |
| 1986 |
|
register Tcl_Obj *varValuePtr; |
| 1987 |
|
Tcl_Obj *resultPtr; |
| 1988 |
|
int createdNewObj; /* Set 1 if var's value object is shared |
| 1989 |
|
* so we must increment a copy (i.e. copy |
| 1990 |
|
* on write). */ |
| 1991 |
|
long i; |
| 1992 |
|
int result; |
| 1993 |
|
|
| 1994 |
|
varValuePtr = TclGetElementOfIndexedArray(interp, localIndex, elemPtr, |
| 1995 |
|
/*leaveErrorMsg*/ 1); |
| 1996 |
|
if (varValuePtr == NULL) { |
| 1997 |
|
Tcl_AddObjErrorInfo(interp, |
| 1998 |
|
"\n (reading value of variable to increment)", -1); |
| 1999 |
|
return NULL; |
| 2000 |
|
} |
| 2001 |
|
|
| 2002 |
|
/* |
| 2003 |
|
* Reach into the object's representation to extract and increment the |
| 2004 |
|
* variable's value. If the object is unshared we can modify it |
| 2005 |
|
* directly, otherwise we must create a new copy to modify: this is |
| 2006 |
|
* "copy on write". Then free the variable's old string representation, |
| 2007 |
|
* if any, since it will no longer be valid. |
| 2008 |
|
*/ |
| 2009 |
|
|
| 2010 |
|
createdNewObj = 0; |
| 2011 |
|
if (Tcl_IsShared(varValuePtr)) { |
| 2012 |
|
createdNewObj = 1; |
| 2013 |
|
varValuePtr = Tcl_DuplicateObj(varValuePtr); |
| 2014 |
|
} |
| 2015 |
|
result = Tcl_GetLongFromObj(interp, varValuePtr, &i); |
| 2016 |
|
if (result != TCL_OK) { |
| 2017 |
|
if (createdNewObj) { |
| 2018 |
|
Tcl_DecrRefCount(varValuePtr); /* free unneeded copy */ |
| 2019 |
|
} |
| 2020 |
|
return NULL; |
| 2021 |
|
} |
| 2022 |
|
Tcl_SetLongObj(varValuePtr, (i + incrAmount)); |
| 2023 |
|
|
| 2024 |
|
/* |
| 2025 |
|
* Store the variable's new value and run any write traces. |
| 2026 |
|
*/ |
| 2027 |
|
|
| 2028 |
|
resultPtr = TclSetElementOfIndexedArray(interp, localIndex, elemPtr, |
| 2029 |
|
varValuePtr, |
| 2030 |
|
/*leaveErrorMsg*/ 1); |
| 2031 |
|
if (resultPtr == NULL) { |
| 2032 |
|
return NULL; |
| 2033 |
|
} |
| 2034 |
|
return resultPtr; |
| 2035 |
|
} |
| 2036 |
|
|
| 2037 |
|
/* |
| 2038 |
|
*---------------------------------------------------------------------- |
| 2039 |
|
* |
| 2040 |
|
* Tcl_UnsetVar -- |
| 2041 |
|
* |
| 2042 |
|
* Delete a variable, so that it may not be accessed anymore. |
| 2043 |
|
* |
| 2044 |
|
* Results: |
| 2045 |
|
* Returns TCL_OK if the variable was successfully deleted, TCL_ERROR |
| 2046 |
|
* if the variable can't be unset. In the event of an error, |
| 2047 |
|
* if the TCL_LEAVE_ERR_MSG flag is set then an error message |
| 2048 |
|
* is left in the interp's result. |
| 2049 |
|
* |
| 2050 |
|
* Side effects: |
| 2051 |
|
* If varName is defined as a local or global variable in interp, |
| 2052 |
|
* it is deleted. |
| 2053 |
|
* |
| 2054 |
|
*---------------------------------------------------------------------- |
| 2055 |
|
*/ |
| 2056 |
|
|
| 2057 |
|
int |
| 2058 |
|
Tcl_UnsetVar(interp, varName, flags) |
| 2059 |
|
Tcl_Interp *interp; /* Command interpreter in which varName is |
| 2060 |
|
* to be looked up. */ |
| 2061 |
|
char *varName; /* Name of a variable in interp. May be |
| 2062 |
|
* either a scalar name or an array name |
| 2063 |
|
* or an element in an array. */ |
| 2064 |
|
int flags; /* OR-ed combination of any of |
| 2065 |
|
* TCL_GLOBAL_ONLY, TCL_NAMESPACE_ONLY or |
| 2066 |
|
* TCL_LEAVE_ERR_MSG. */ |
| 2067 |
|
{ |
| 2068 |
|
return Tcl_UnsetVar2(interp, varName, (char *) NULL, flags); |
| 2069 |
|
} |
| 2070 |
|
|
| 2071 |
|
/* |
| 2072 |
|
*---------------------------------------------------------------------- |
| 2073 |
|
* |
| 2074 |
|
* Tcl_UnsetVar2 -- |
| 2075 |
|
* |
| 2076 |
|
* Delete a variable, given a 2-part name. |
| 2077 |
|
* |
| 2078 |
|
* Results: |
| 2079 |
|
* Returns TCL_OK if the variable was successfully deleted, TCL_ERROR |
| 2080 |
|
* if the variable can't be unset. In the event of an error, |
| 2081 |
|
* if the TCL_LEAVE_ERR_MSG flag is set then an error message |
| 2082 |
|
* is left in the interp's result. |
| 2083 |
|
* |
| 2084 |
|
* Side effects: |
| 2085 |
|
* If part1 and part2 indicate a local or global variable in interp, |
| 2086 |
|
* it is deleted. If part1 is an array name and part2 is NULL, then |
| 2087 |
|
* the whole array is deleted. |
| 2088 |
|
* |
| 2089 |
|
*---------------------------------------------------------------------- |
| 2090 |
|
*/ |
| 2091 |
|
|
| 2092 |
|
int |
| 2093 |
|
Tcl_UnsetVar2(interp, part1, part2, flags) |
| 2094 |
|
Tcl_Interp *interp; /* Command interpreter in which varName is |
| 2095 |
|
* to be looked up. */ |
| 2096 |
|
char *part1; /* Name of variable or array. */ |
| 2097 |
|
char *part2; /* Name of element within array or NULL. */ |
| 2098 |
|
int flags; /* OR-ed combination of any of |
| 2099 |
|
* TCL_GLOBAL_ONLY, TCL_NAMESPACE_ONLY, |
| 2100 |
|
* TCL_LEAVE_ERR_MSG. */ |
| 2101 |
|
{ |
| 2102 |
|
Var dummyVar; |
| 2103 |
|
Var *varPtr, *dummyVarPtr; |
| 2104 |
|
Interp *iPtr = (Interp *) interp; |
| 2105 |
|
Var *arrayPtr; |
| 2106 |
|
ActiveVarTrace *activePtr; |
| 2107 |
|
Tcl_Obj *objPtr; |
| 2108 |
|
int result; |
| 2109 |
|
|
| 2110 |
|
varPtr = TclLookupVar(interp, part1, part2, flags, "unset", |
| 2111 |
|
/*createPart1*/ 0, /*createPart2*/ 0, &arrayPtr); |
| 2112 |
|
if (varPtr == NULL) { |
| 2113 |
|
return TCL_ERROR; |
| 2114 |
|
} |
| 2115 |
|
result = (TclIsVarUndefined(varPtr)? TCL_ERROR : TCL_OK); |
| 2116 |
|
|
| 2117 |
|
if ((arrayPtr != NULL) && (arrayPtr->searchPtr != NULL)) { |
| 2118 |
|
DeleteSearches(arrayPtr); |
| 2119 |
|
} |
| 2120 |
|
|
| 2121 |
|
/* |
| 2122 |
|
* The code below is tricky, because of the possibility that |
| 2123 |
|
* a trace procedure might try to access a variable being |
| 2124 |
|
* deleted. To handle this situation gracefully, do things |
| 2125 |
|
* in three steps: |
| 2126 |
|
* 1. Copy the contents of the variable to a dummy variable |
| 2127 |
|
* structure, and mark the original Var structure as undefined. |
| 2128 |
|
* 2. Invoke traces and clean up the variable, using the dummy copy. |
| 2129 |
|
* 3. If at the end of this the original variable is still |
| 2130 |
|
* undefined and has no outstanding references, then delete |
| 2131 |
|
* it (but it could have gotten recreated by a trace). |
| 2132 |
|
*/ |
| 2133 |
|
|
| 2134 |
|
dummyVar = *varPtr; |
| 2135 |
|
TclSetVarUndefined(varPtr); |
| 2136 |
|
TclSetVarScalar(varPtr); |
| 2137 |
|
varPtr->value.objPtr = NULL; /* dummyVar points to any value object */ |
| 2138 |
|
varPtr->tracePtr = NULL; |
| 2139 |
|
varPtr->searchPtr = NULL; |
| 2140 |
|
|
| 2141 |
|
/* |
| 2142 |
|
* Call trace procedures for the variable being deleted. Then delete |
| 2143 |
|
* its traces. Be sure to abort any other traces for the variable |
| 2144 |
|
* that are still pending. Special tricks: |
| 2145 |
|
* 1. We need to increment varPtr's refCount around this: CallTraces |
| 2146 |
|
* will use dummyVar so it won't increment varPtr's refCount itself. |
| 2147 |
|
* 2. Turn off the VAR_TRACE_ACTIVE flag in dummyVar: we want to |
| 2148 |
|
* call unset traces even if other traces are pending. |
| 2149 |
|
*/ |
| 2150 |
|
|
| 2151 |
|
if ((dummyVar.tracePtr != NULL) |
| 2152 |
|
|| ((arrayPtr != NULL) && (arrayPtr->tracePtr != NULL))) { |
| 2153 |
|
varPtr->refCount++; |
| 2154 |
|
dummyVar.flags &= ~VAR_TRACE_ACTIVE; |
| 2155 |
|
(void) CallTraces(iPtr, arrayPtr, &dummyVar, part1, part2, |
| 2156 |
|
(flags & (TCL_GLOBAL_ONLY|TCL_NAMESPACE_ONLY)) | TCL_TRACE_UNSETS); |
| 2157 |
|
while (dummyVar.tracePtr != NULL) { |
| 2158 |
|
VarTrace *tracePtr = dummyVar.tracePtr; |
| 2159 |
|
dummyVar.tracePtr = tracePtr->nextPtr; |
| 2160 |
|
ckfree((char *) tracePtr); |
| 2161 |
|
} |
| 2162 |
|
for (activePtr = iPtr->activeTracePtr; activePtr != NULL; |
| 2163 |
|
activePtr = activePtr->nextPtr) { |
| 2164 |
|
if (activePtr->varPtr == varPtr) { |
| 2165 |
|
activePtr->nextTracePtr = NULL; |
| 2166 |
|
} |
| 2167 |
|
} |
| 2168 |
|
varPtr->refCount--; |
| 2169 |
|
} |
| 2170 |
|
|
| 2171 |
|
/* |
| 2172 |
|
* If the variable is an array, delete all of its elements. This must be |
| 2173 |
|
* done after calling the traces on the array, above (that's the way |
| 2174 |
|
* traces are defined). If it is a scalar, "discard" its object |
| 2175 |
|
* (decrement the ref count of its object, if any). |
| 2176 |
|
*/ |
| 2177 |
|
|
| 2178 |
|
dummyVarPtr = &dummyVar; |
| 2179 |
|
if (TclIsVarArray(dummyVarPtr) && !TclIsVarUndefined(dummyVarPtr)) { |
| 2180 |
|
/* |
| 2181 |
|
* Deleting the elements of the array may cause traces to be fired |
| 2182 |
|
* on those elements. Before deleting them, bump the reference count |
| 2183 |
|
* of the array, so that if those trace procs make a global or upvar |
| 2184 |
|
* link to the array, the array is not deleted when the call stack |
| 2185 |
|
* gets popped (we will delete the array ourselves later in this |
| 2186 |
|
* function). |
| 2187 |
|
* |
| 2188 |
|
* Bumping the count can lead to the odd situation that elements of the |
| 2189 |
|
* array are being deleted when the array still exists, but since the |
| 2190 |
|
* array is about to be removed anyway, that shouldn't really matter. |
| 2191 |
|
*/ |
| 2192 |
|
varPtr->refCount++; |
| 2193 |
|
DeleteArray(iPtr, part1, dummyVarPtr, |
| 2194 |
|
(flags & (TCL_GLOBAL_ONLY|TCL_NAMESPACE_ONLY)) | TCL_TRACE_UNSETS); |
| 2195 |
|
/* Decr ref count */ |
| 2196 |
|
varPtr->refCount--; |
| 2197 |
|
} |
| 2198 |
|
if (TclIsVarScalar(dummyVarPtr) |
| 2199 |
|
&& (dummyVarPtr->value.objPtr != NULL)) { |
| 2200 |
|
objPtr = dummyVarPtr->value.objPtr; |
| 2201 |
|
TclDecrRefCount(objPtr); |
| 2202 |
|
dummyVarPtr->value.objPtr = NULL; |
| 2203 |
|
} |
| 2204 |
|
|
| 2205 |
|
/* |
| 2206 |
|
* If the variable was a namespace variable, decrement its reference count. |
| 2207 |
|
*/ |
| 2208 |
|
|
| 2209 |
|
if (varPtr->flags & VAR_NAMESPACE_VAR) { |
| 2210 |
|
varPtr->flags &= ~VAR_NAMESPACE_VAR; |
| 2211 |
|
varPtr->refCount--; |
| 2212 |
|
} |
| 2213 |
|
|
| 2214 |
|
/* |
| 2215 |
|
* It's an error to unset an undefined variable. |
| 2216 |
|
*/ |
| 2217 |
|
|
| 2218 |
|
if (result != TCL_OK) { |
| 2219 |
|
if (flags & TCL_LEAVE_ERR_MSG) { |
| 2220 |
|
VarErrMsg(interp, part1, part2, "unset", |
| 2221 |
|
((arrayPtr == NULL) ? noSuchVar : noSuchElement)); |
| 2222 |
|
} |
| 2223 |
|
} |
| 2224 |
|
|
| 2225 |
|
/* |
| 2226 |
|
* Finally, if the variable is truly not in use then free up its Var |
| 2227 |
|
* structure and remove it from its hash table, if any. The ref count of |
| 2228 |
|
* its value object, if any, was decremented above. |
| 2229 |
|
*/ |
| 2230 |
|
|
| 2231 |
|
CleanupVar(varPtr, arrayPtr); |
| 2232 |
|
return result; |
| 2233 |
|
} |
| 2234 |
|
|
| 2235 |
|
/* |
| 2236 |
|
*---------------------------------------------------------------------- |
| 2237 |
|
* |
| 2238 |
|
* Tcl_TraceVar -- |
| 2239 |
|
* |
| 2240 |
|
* Arrange for reads and/or writes to a variable to cause a |
| 2241 |
|
* procedure to be invoked, which can monitor the operations |
| 2242 |
|
* and/or change their actions. |
| 2243 |
|
* |
| 2244 |
|
* Results: |
| 2245 |
|
* A standard Tcl return value. |
| 2246 |
|
* |
| 2247 |
|
* Side effects: |
| 2248 |
|
* A trace is set up on the variable given by varName, such that |
| 2249 |
|
* future references to the variable will be intermediated by |
| 2250 |
|
* proc. See the manual entry for complete details on the calling |
| 2251 |
|
* sequence for proc. |
| 2252 |
|
* |
| 2253 |
|
*---------------------------------------------------------------------- |
| 2254 |
|
*/ |
| 2255 |
|
|
| 2256 |
|
int |
| 2257 |
|
Tcl_TraceVar(interp, varName, flags, proc, clientData) |
| 2258 |
|
Tcl_Interp *interp; /* Interpreter in which variable is |
| 2259 |
|
* to be traced. */ |
| 2260 |
|
char *varName; /* Name of variable; may end with "(index)" |
| 2261 |
|
* to signify an array reference. */ |
| 2262 |
|
int flags; /* OR-ed collection of bits, including any |
| 2263 |
|
* of TCL_TRACE_READS, TCL_TRACE_WRITES, |
| 2264 |
|
* TCL_TRACE_UNSETS, TCL_GLOBAL_ONLY, and |
| 2265 |
|
* TCL_NAMESPACE_ONLY. */ |
| 2266 |
|
Tcl_VarTraceProc *proc; /* Procedure to call when specified ops are |
| 2267 |
|
* invoked upon varName. */ |
| 2268 |
|
ClientData clientData; /* Arbitrary argument to pass to proc. */ |
| 2269 |
|
{ |
| 2270 |
|
return Tcl_TraceVar2(interp, varName, (char *) NULL, |
| 2271 |
|
flags, proc, clientData); |
| 2272 |
|
} |
| 2273 |
|
|
| 2274 |
|
/* |
| 2275 |
|
*---------------------------------------------------------------------- |
| 2276 |
|
* |
| 2277 |
|
* Tcl_TraceVar2 -- |
| 2278 |
|
* |
| 2279 |
|
* Arrange for reads and/or writes to a variable to cause a |
| 2280 |
|
* procedure to be invoked, which can monitor the operations |
| 2281 |
|
* and/or change their actions. |
| 2282 |
|
* |
| 2283 |
|
* Results: |
| 2284 |
|
* A standard Tcl return value. |
| 2285 |
|
* |
| 2286 |
|
* Side effects: |
| 2287 |
|
* A trace is set up on the variable given by part1 and part2, such |
| 2288 |
|
* that future references to the variable will be intermediated by |
| 2289 |
|
* proc. See the manual entry for complete details on the calling |
| 2290 |
|
* sequence for proc. |
| 2291 |
|
* |
| 2292 |
|
*---------------------------------------------------------------------- |
| 2293 |
|
*/ |
| 2294 |
|
|
| 2295 |
|
int |
| 2296 |
|
Tcl_TraceVar2(interp, part1, part2, flags, proc, clientData) |
| 2297 |
|
Tcl_Interp *interp; /* Interpreter in which variable is |
| 2298 |
|
* to be traced. */ |
| 2299 |
|
char *part1; /* Name of scalar variable or array. */ |
| 2300 |
|
char *part2; /* Name of element within array; NULL means |
| 2301 |
|
* trace applies to scalar variable or array |
| 2302 |
|
* as-a-whole. */ |
| 2303 |
|
int flags; /* OR-ed collection of bits, including any |
| 2304 |
|
* of TCL_TRACE_READS, TCL_TRACE_WRITES, |
| 2305 |
|
* TCL_TRACE_UNSETS, TCL_GLOBAL_ONLY, |
| 2306 |
|
* and TCL_NAMESPACE_ONLY. */ |
| 2307 |
|
Tcl_VarTraceProc *proc; /* Procedure to call when specified ops are |
| 2308 |
|
* invoked upon varName. */ |
| 2309 |
|
ClientData clientData; /* Arbitrary argument to pass to proc. */ |
| 2310 |
|
{ |
| 2311 |
|
Var *varPtr, *arrayPtr; |
| 2312 |
|
register VarTrace *tracePtr; |
| 2313 |
|
|
| 2314 |
|
varPtr = TclLookupVar(interp, part1, part2, (flags | TCL_LEAVE_ERR_MSG), |
| 2315 |
|
"trace", /*createPart1*/ 1, /*createPart2*/ 1, &arrayPtr); |
| 2316 |
|
if (varPtr == NULL) { |
| 2317 |
|
return TCL_ERROR; |
| 2318 |
|
} |
| 2319 |
|
|
| 2320 |
|
/* |
| 2321 |
|
* Set up trace information. |
| 2322 |
|
*/ |
| 2323 |
|
|
| 2324 |
|
tracePtr = (VarTrace *) ckalloc(sizeof(VarTrace)); |
| 2325 |
|
tracePtr->traceProc = proc; |
| 2326 |
|
tracePtr->clientData = clientData; |
| 2327 |
|
tracePtr->flags = |
| 2328 |
|
flags & (TCL_TRACE_READS | TCL_TRACE_WRITES | TCL_TRACE_UNSETS | |
| 2329 |
|
TCL_TRACE_ARRAY); |
| 2330 |
|
tracePtr->nextPtr = varPtr->tracePtr; |
| 2331 |
|
varPtr->tracePtr = tracePtr; |
| 2332 |
|
return TCL_OK; |
| 2333 |
|
} |
| 2334 |
|
|
| 2335 |
|
/* |
| 2336 |
|
*---------------------------------------------------------------------- |
| 2337 |
|
* |
| 2338 |
|
* Tcl_UntraceVar -- |
| 2339 |
|
* |
| 2340 |
|
* Remove a previously-created trace for a variable. |
| 2341 |
|
* |
| 2342 |
|
* Results: |
| 2343 |
|
* None. |
| 2344 |
|
* |
| 2345 |
|
* Side effects: |
| 2346 |
|
* If there exists a trace for the variable given by varName |
| 2347 |
|
* with the given flags, proc, and clientData, then that trace |
| 2348 |
|
* is removed. |
| 2349 |
|
* |
| 2350 |
|
*---------------------------------------------------------------------- |
| 2351 |
|
*/ |
| 2352 |
|
|
| 2353 |
|
void |
| 2354 |
|
Tcl_UntraceVar(interp, varName, flags, proc, clientData) |
| 2355 |
|
Tcl_Interp *interp; /* Interpreter containing variable. */ |
| 2356 |
|
char *varName; /* Name of variable; may end with "(index)" |
| 2357 |
|
* to signify an array reference. */ |
| 2358 |
|
int flags; /* OR-ed collection of bits describing |
| 2359 |
|
* current trace, including any of |
| 2360 |
|
* TCL_TRACE_READS, TCL_TRACE_WRITES, |
| 2361 |
|
* TCL_TRACE_UNSETS, TCL_GLOBAL_ONLY |
| 2362 |
|
* and TCL_NAMESPACE_ONLY. */ |
| 2363 |
|
Tcl_VarTraceProc *proc; /* Procedure assocated with trace. */ |
| 2364 |
|
ClientData clientData; /* Arbitrary argument to pass to proc. */ |
| 2365 |
|
{ |
| 2366 |
|
Tcl_UntraceVar2(interp, varName, (char *) NULL, flags, proc, clientData); |
| 2367 |
|
} |
| 2368 |
|
|
| 2369 |
|
/* |
| 2370 |
|
*---------------------------------------------------------------------- |
| 2371 |
|
* |
| 2372 |
|
* Tcl_UntraceVar2 -- |
| 2373 |
|
* |
| 2374 |
|
* Remove a previously-created trace for a variable. |
| 2375 |
|
* |
| 2376 |
|
* Results: |
| 2377 |
|
* None. |
| 2378 |
|
* |
| 2379 |
|
* Side effects: |
| 2380 |
|
* If there exists a trace for the variable given by part1 |
| 2381 |
|
* and part2 with the given flags, proc, and clientData, then |
| 2382 |
|
* that trace is removed. |
| 2383 |
|
* |
| 2384 |
|
*---------------------------------------------------------------------- |
| 2385 |
|
*/ |
| 2386 |
|
|
| 2387 |
|
void |
| 2388 |
|
Tcl_UntraceVar2(interp, part1, part2, flags, proc, clientData) |
| 2389 |
|
Tcl_Interp *interp; /* Interpreter containing variable. */ |
| 2390 |
|
char *part1; /* Name of variable or array. */ |
| 2391 |
|
char *part2; /* Name of element within array; NULL means |
| 2392 |
|
* trace applies to scalar variable or array |
| 2393 |
|
* as-a-whole. */ |
| 2394 |
|
int flags; /* OR-ed collection of bits describing |
| 2395 |
|
* current trace, including any of |
| 2396 |
|
* TCL_TRACE_READS, TCL_TRACE_WRITES, |
| 2397 |
|
* TCL_TRACE_UNSETS, TCL_GLOBAL_ONLY, |
| 2398 |
|
* and TCL_NAMESPACE_ONLY. */ |
| 2399 |
|
Tcl_VarTraceProc *proc; /* Procedure assocated with trace. */ |
| 2400 |
|
ClientData clientData; /* Arbitrary argument to pass to proc. */ |
| 2401 |
|
{ |
| 2402 |
|
register VarTrace *tracePtr; |
| 2403 |
|
VarTrace *prevPtr; |
| 2404 |
|
Var *varPtr, *arrayPtr; |
| 2405 |
|
Interp *iPtr = (Interp *) interp; |
| 2406 |
|
ActiveVarTrace *activePtr; |
| 2407 |
|
|
| 2408 |
|
varPtr = TclLookupVar(interp, part1, part2, |
| 2409 |
|
flags & (TCL_GLOBAL_ONLY|TCL_NAMESPACE_ONLY), |
| 2410 |
|
/*msg*/ (char *) NULL, |
| 2411 |
|
/*createPart1*/ 0, /*createPart2*/ 0, &arrayPtr); |
| 2412 |
|
if (varPtr == NULL) { |
| 2413 |
|
return; |
| 2414 |
|
} |
| 2415 |
|
|
| 2416 |
|
flags &= (TCL_TRACE_READS | TCL_TRACE_WRITES | TCL_TRACE_UNSETS | |
| 2417 |
|
TCL_TRACE_ARRAY); |
| 2418 |
|
for (tracePtr = varPtr->tracePtr, prevPtr = NULL; ; |
| 2419 |
|
prevPtr = tracePtr, tracePtr = tracePtr->nextPtr) { |
| 2420 |
|
if (tracePtr == NULL) { |
| 2421 |
|
return; |
| 2422 |
|
} |
| 2423 |
|
if ((tracePtr->traceProc == proc) && (tracePtr->flags == flags) |
| 2424 |
|
&& (tracePtr->clientData == clientData)) { |
| 2425 |
|
break; |
| 2426 |
|
} |
| 2427 |
|
} |
| 2428 |
|
|
| 2429 |
|
/* |
| 2430 |
|
* The code below makes it possible to delete traces while traces |
| 2431 |
|
* are active: it makes sure that the deleted trace won't be |
| 2432 |
|
* processed by CallTraces. |
| 2433 |
|
*/ |
| 2434 |
|
|
| 2435 |
|
for (activePtr = iPtr->activeTracePtr; activePtr != NULL; |
| 2436 |
|
activePtr = activePtr->nextPtr) { |
| 2437 |
|
if (activePtr->nextTracePtr == tracePtr) { |
| 2438 |
|
activePtr->nextTracePtr = tracePtr->nextPtr; |
| 2439 |
|
} |
| 2440 |
|
} |
| 2441 |
|
if (prevPtr == NULL) { |
| 2442 |
|
varPtr->tracePtr = tracePtr->nextPtr; |
| 2443 |
|
} else { |
| 2444 |
|
prevPtr->nextPtr = tracePtr->nextPtr; |
| 2445 |
|
} |
| 2446 |
|
ckfree((char *) tracePtr); |
| 2447 |
|
|
| 2448 |
|
/* |
| 2449 |
|
* If this is the last trace on the variable, and the variable is |
| 2450 |
|
* unset and unused, then free up the variable. |
| 2451 |
|
*/ |
| 2452 |
|
|
| 2453 |
|
if (TclIsVarUndefined(varPtr)) { |
| 2454 |
|
CleanupVar(varPtr, (Var *) NULL); |
| 2455 |
|
} |
| 2456 |
|
} |
| 2457 |
|
|
| 2458 |
|
/* |
| 2459 |
|
*---------------------------------------------------------------------- |
| 2460 |
|
* |
| 2461 |
|
* Tcl_VarTraceInfo -- |
| 2462 |
|
* |
| 2463 |
|
* Return the clientData value associated with a trace on a |
| 2464 |
|
* variable. This procedure can also be used to step through |
| 2465 |
|
* all of the traces on a particular variable that have the |
| 2466 |
|
* same trace procedure. |
| 2467 |
|
* |
| 2468 |
|
* Results: |
| 2469 |
|
* The return value is the clientData value associated with |
| 2470 |
|
* a trace on the given variable. Information will only be |
| 2471 |
|
* returned for a trace with proc as trace procedure. If |
| 2472 |
|
* the clientData argument is NULL then the first such trace is |
| 2473 |
|
* returned; otherwise, the next relevant one after the one |
| 2474 |
|
* given by clientData will be returned. If the variable |
| 2475 |
|
* doesn't exist, or if there are no (more) traces for it, |
| 2476 |
|
* then NULL is returned. |
| 2477 |
|
* |
| 2478 |
|
* Side effects: |
| 2479 |
|
* None. |
| 2480 |
|
* |
| 2481 |
|
*---------------------------------------------------------------------- |
| 2482 |
|
*/ |
| 2483 |
|
|
| 2484 |
|
ClientData |
| 2485 |
|
Tcl_VarTraceInfo(interp, varName, flags, proc, prevClientData) |
| 2486 |
|
Tcl_Interp *interp; /* Interpreter containing variable. */ |
| 2487 |
|
char *varName; /* Name of variable; may end with "(index)" |
| 2488 |
|
* to signify an array reference. */ |
| 2489 |
|
int flags; /* OR-ed combo or TCL_GLOBAL_ONLY, |
| 2490 |
|
* TCL_NAMESPACE_ONLY (can be 0). */ |
| 2491 |
|
Tcl_VarTraceProc *proc; /* Procedure assocated with trace. */ |
| 2492 |
|
ClientData prevClientData; /* If non-NULL, gives last value returned |
| 2493 |
|
* by this procedure, so this call will |
| 2494 |
|
* return the next trace after that one. |
| 2495 |
|
* If NULL, this call will return the |
| 2496 |
|
* first trace. */ |
| 2497 |
|
{ |
| 2498 |
|
return Tcl_VarTraceInfo2(interp, varName, (char *) NULL, |
| 2499 |
|
flags, proc, prevClientData); |
| 2500 |
|
} |
| 2501 |
|
|
| 2502 |
|
/* |
| 2503 |
|
*---------------------------------------------------------------------- |
| 2504 |
|
* |
| 2505 |
|
* Tcl_VarTraceInfo2 -- |
| 2506 |
|
* |
| 2507 |
|
* Same as Tcl_VarTraceInfo, except takes name in two pieces |
| 2508 |
|
* instead of one. |
| 2509 |
|
* |
| 2510 |
|
* Results: |
| 2511 |
|
* Same as Tcl_VarTraceInfo. |
| 2512 |
|
* |
| 2513 |
|
* Side effects: |
| 2514 |
|
* None. |
| 2515 |
|
* |
| 2516 |
|
*---------------------------------------------------------------------- |
| 2517 |
|
*/ |
| 2518 |
|
|
| 2519 |
|
ClientData |
| 2520 |
|
Tcl_VarTraceInfo2(interp, part1, part2, flags, proc, prevClientData) |
| 2521 |
|
Tcl_Interp *interp; /* Interpreter containing variable. */ |
| 2522 |
|
char *part1; /* Name of variable or array. */ |
| 2523 |
|
char *part2; /* Name of element within array; NULL means |
| 2524 |
|
* trace applies to scalar variable or array |
| 2525 |
|
* as-a-whole. */ |
| 2526 |
|
int flags; /* OR-ed combination of TCL_GLOBAL_ONLY, |
| 2527 |
|
* TCL_NAMESPACE_ONLY. */ |
| 2528 |
|
Tcl_VarTraceProc *proc; /* Procedure assocated with trace. */ |
| 2529 |
|
ClientData prevClientData; /* If non-NULL, gives last value returned |
| 2530 |
|
* by this procedure, so this call will |
| 2531 |
|
* return the next trace after that one. |
| 2532 |
|
* If NULL, this call will return the |
| 2533 |
|
* first trace. */ |
| 2534 |
|
{ |
| 2535 |
|
register VarTrace *tracePtr; |
| 2536 |
|
Var *varPtr, *arrayPtr; |
| 2537 |
|
|
| 2538 |
|
varPtr = TclLookupVar(interp, part1, part2, |
| 2539 |
|
flags & (TCL_GLOBAL_ONLY|TCL_NAMESPACE_ONLY), |
| 2540 |
|
/*msg*/ (char *) NULL, |
| 2541 |
|
/*createPart1*/ 0, /*createPart2*/ 0, &arrayPtr); |
| 2542 |
|
if (varPtr == NULL) { |
| 2543 |
|
return NULL; |
| 2544 |
|
} |
| 2545 |
|
|
| 2546 |
|
/* |
| 2547 |
|
* Find the relevant trace, if any, and return its clientData. |
| 2548 |
|
*/ |
| 2549 |
|
|
| 2550 |
|
tracePtr = varPtr->tracePtr; |
| 2551 |
|
if (prevClientData != NULL) { |
| 2552 |
|
for ( ; tracePtr != NULL; tracePtr = tracePtr->nextPtr) { |
| 2553 |
|
if ((tracePtr->clientData == prevClientData) |
| 2554 |
|
&& (tracePtr->traceProc == proc)) { |
| 2555 |
|
tracePtr = tracePtr->nextPtr; |
| 2556 |
|
break; |
| 2557 |
|
} |
| 2558 |
|
} |
| 2559 |
|
} |
| 2560 |
|
for ( ; tracePtr != NULL; tracePtr = tracePtr->nextPtr) { |
| 2561 |
|
if (tracePtr->traceProc == proc) { |
| 2562 |
|
return tracePtr->clientData; |
| 2563 |
|
} |
| 2564 |
|
} |
| 2565 |
|
return NULL; |
| 2566 |
|
} |
| 2567 |
|
|
| 2568 |
|
/* |
| 2569 |
|
*---------------------------------------------------------------------- |
| 2570 |
|
* |
| 2571 |
|
* Tcl_UnsetObjCmd -- |
| 2572 |
|
* |
| 2573 |
|
* This object-based procedure is invoked to process the "unset" Tcl |
| 2574 |
|
* command. See the user documentation for details on what it does. |
| 2575 |
|
* |
| 2576 |
|
* Results: |
| 2577 |
|
* A standard Tcl object result value. |
| 2578 |
|
* |
| 2579 |
|
* Side effects: |
| 2580 |
|
* See the user documentation. |
| 2581 |
|
* |
| 2582 |
|
*---------------------------------------------------------------------- |
| 2583 |
|
*/ |
| 2584 |
|
|
| 2585 |
|
/* ARGSUSED */ |
| 2586 |
|
int |
| 2587 |
|
Tcl_UnsetObjCmd(dummy, interp, objc, objv) |
| 2588 |
|
ClientData dummy; /* Not used. */ |
| 2589 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 2590 |
|
int objc; /* Number of arguments. */ |
| 2591 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 2592 |
|
{ |
| 2593 |
|
register int i; |
| 2594 |
|
register char *name; |
| 2595 |
|
|
| 2596 |
|
if (objc < 2) { |
| 2597 |
|
Tcl_WrongNumArgs(interp, 1, objv, "varName ?varName ...?"); |
| 2598 |
|
return TCL_ERROR; |
| 2599 |
|
} |
| 2600 |
|
|
| 2601 |
|
for (i = 1; i < objc; i++) { |
| 2602 |
|
name = TclGetString(objv[i]); |
| 2603 |
|
if (Tcl_UnsetVar2(interp, name, (char *) NULL, |
| 2604 |
|
TCL_LEAVE_ERR_MSG) != TCL_OK) { |
| 2605 |
|
return TCL_ERROR; |
| 2606 |
|
} |
| 2607 |
|
} |
| 2608 |
|
return TCL_OK; |
| 2609 |
|
} |
| 2610 |
|
|
| 2611 |
|
/* |
| 2612 |
|
*---------------------------------------------------------------------- |
| 2613 |
|
* |
| 2614 |
|
* Tcl_AppendObjCmd -- |
| 2615 |
|
* |
| 2616 |
|
* This object-based procedure is invoked to process the "append" |
| 2617 |
|
* Tcl command. See the user documentation for details on what it does. |
| 2618 |
|
* |
| 2619 |
|
* Results: |
| 2620 |
|
* A standard Tcl object result value. |
| 2621 |
|
* |
| 2622 |
|
* Side effects: |
| 2623 |
|
* A variable's value may be changed. |
| 2624 |
|
* |
| 2625 |
|
*---------------------------------------------------------------------- |
| 2626 |
|
*/ |
| 2627 |
|
|
| 2628 |
|
/* ARGSUSED */ |
| 2629 |
|
int |
| 2630 |
|
Tcl_AppendObjCmd(dummy, interp, objc, objv) |
| 2631 |
|
ClientData dummy; /* Not used. */ |
| 2632 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 2633 |
|
int objc; /* Number of arguments. */ |
| 2634 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 2635 |
|
{ |
| 2636 |
|
register Tcl_Obj *varValuePtr = NULL; |
| 2637 |
|
/* Initialized to avoid compiler |
| 2638 |
|
* warning. */ |
| 2639 |
|
int i; |
| 2640 |
|
|
| 2641 |
|
if (objc < 2) { |
| 2642 |
|
Tcl_WrongNumArgs(interp, 1, objv, "varName ?value value ...?"); |
| 2643 |
|
return TCL_ERROR; |
| 2644 |
|
} |
| 2645 |
|
if (objc == 2) { |
| 2646 |
|
varValuePtr = Tcl_ObjGetVar2(interp, objv[1], NULL, TCL_LEAVE_ERR_MSG); |
| 2647 |
|
if (varValuePtr == NULL) { |
| 2648 |
|
return TCL_ERROR; |
| 2649 |
|
} |
| 2650 |
|
} else { |
| 2651 |
|
for (i = 2; i < objc; i++) { |
| 2652 |
|
varValuePtr = Tcl_ObjSetVar2(interp, objv[1], (Tcl_Obj *) NULL, |
| 2653 |
|
objv[i], (TCL_APPEND_VALUE | TCL_LEAVE_ERR_MSG)); |
| 2654 |
|
if (varValuePtr == NULL) { |
| 2655 |
|
return TCL_ERROR; |
| 2656 |
|
} |
| 2657 |
|
} |
| 2658 |
|
} |
| 2659 |
|
Tcl_SetObjResult(interp, varValuePtr); |
| 2660 |
|
return TCL_OK; |
| 2661 |
|
} |
| 2662 |
|
|
| 2663 |
|
/* |
| 2664 |
|
*---------------------------------------------------------------------- |
| 2665 |
|
* |
| 2666 |
|
* Tcl_LappendObjCmd -- |
| 2667 |
|
* |
| 2668 |
|
* This object-based procedure is invoked to process the "lappend" |
| 2669 |
|
* Tcl command. See the user documentation for details on what it does. |
| 2670 |
|
* |
| 2671 |
|
* Results: |
| 2672 |
|
* A standard Tcl object result value. |
| 2673 |
|
* |
| 2674 |
|
* Side effects: |
| 2675 |
|
* A variable's value may be changed. |
| 2676 |
|
* |
| 2677 |
|
*---------------------------------------------------------------------- |
| 2678 |
|
*/ |
| 2679 |
|
|
| 2680 |
|
/* ARGSUSED */ |
| 2681 |
|
int |
| 2682 |
|
Tcl_LappendObjCmd(dummy, interp, objc, objv) |
| 2683 |
|
ClientData dummy; /* Not used. */ |
| 2684 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 2685 |
|
int objc; /* Number of arguments. */ |
| 2686 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 2687 |
|
{ |
| 2688 |
|
Tcl_Obj *varValuePtr, *newValuePtr; |
| 2689 |
|
register List *listRepPtr; |
| 2690 |
|
register Tcl_Obj **elemPtrs; |
| 2691 |
|
int numElems, numRequired, createdNewObj, createVar, i, j; |
| 2692 |
|
|
| 2693 |
|
if (objc < 2) { |
| 2694 |
|
Tcl_WrongNumArgs(interp, 1, objv, "varName ?value value ...?"); |
| 2695 |
|
return TCL_ERROR; |
| 2696 |
|
} |
| 2697 |
|
if (objc == 2) { |
| 2698 |
|
newValuePtr = Tcl_ObjGetVar2(interp, objv[1], (Tcl_Obj *) NULL, |
| 2699 |
|
(TCL_LEAVE_ERR_MSG)); |
| 2700 |
|
if (newValuePtr == NULL) { |
| 2701 |
|
/* |
| 2702 |
|
* The variable doesn't exist yet. Just create it with an empty |
| 2703 |
|
* initial value. |
| 2704 |
|
*/ |
| 2705 |
|
|
| 2706 |
|
Tcl_Obj *nullObjPtr = Tcl_NewObj(); |
| 2707 |
|
newValuePtr = Tcl_ObjSetVar2(interp, objv[1], NULL, |
| 2708 |
|
nullObjPtr, TCL_LEAVE_ERR_MSG); |
| 2709 |
|
if (newValuePtr == NULL) { |
| 2710 |
|
Tcl_DecrRefCount(nullObjPtr); /* free unneeded object */ |
| 2711 |
|
return TCL_ERROR; |
| 2712 |
|
} |
| 2713 |
|
} |
| 2714 |
|
} else { |
| 2715 |
|
/* |
| 2716 |
|
* We have arguments to append. We used to call Tcl_SetVar2 to |
| 2717 |
|
* append each argument one at a time to ensure that traces were run |
| 2718 |
|
* for each append step. We now append the arguments all at once |
| 2719 |
|
* because it's faster. Note that a read trace and a write trace for |
| 2720 |
|
* the variable will now each only be called once. Also, if the |
| 2721 |
|
* variable's old value is unshared we modify it directly, otherwise |
| 2722 |
|
* we create a new copy to modify: this is "copy on write". |
| 2723 |
|
*/ |
| 2724 |
|
|
| 2725 |
|
createdNewObj = 0; |
| 2726 |
|
createVar = 1; |
| 2727 |
|
varValuePtr = Tcl_ObjGetVar2(interp, objv[1], NULL, 0); |
| 2728 |
|
if (varValuePtr == NULL) { |
| 2729 |
|
/* |
| 2730 |
|
* We couldn't read the old value: either the var doesn't yet |
| 2731 |
|
* exist or it's an array element. If it's new, we will try to |
| 2732 |
|
* create it with Tcl_ObjSetVar2 below. |
| 2733 |
|
*/ |
| 2734 |
|
|
| 2735 |
|
char *p, *varName; |
| 2736 |
|
int nameBytes, i; |
| 2737 |
|
|
| 2738 |
|
varName = Tcl_GetStringFromObj(objv[1], &nameBytes); |
| 2739 |
|
for (i = 0, p = varName; i < nameBytes; i++, p++) { |
| 2740 |
|
if (*p == '(') { |
| 2741 |
|
p = (varName + nameBytes-1); |
| 2742 |
|
if (*p == ')') { /* last char is ')' => array ref */ |
| 2743 |
|
createVar = 0; |
| 2744 |
|
} |
| 2745 |
|
break; |
| 2746 |
|
} |
| 2747 |
|
} |
| 2748 |
|
varValuePtr = Tcl_NewObj(); |
| 2749 |
|
createdNewObj = 1; |
| 2750 |
|
} else if (Tcl_IsShared(varValuePtr)) { |
| 2751 |
|
varValuePtr = Tcl_DuplicateObj(varValuePtr); |
| 2752 |
|
createdNewObj = 1; |
| 2753 |
|
} |
| 2754 |
|
|
| 2755 |
|
/* |
| 2756 |
|
* Convert the variable's old value to a list object if necessary. |
| 2757 |
|
*/ |
| 2758 |
|
|
| 2759 |
|
if (varValuePtr->typePtr != &tclListType) { |
| 2760 |
|
int result = tclListType.setFromAnyProc(interp, varValuePtr); |
| 2761 |
|
if (result != TCL_OK) { |
| 2762 |
|
if (createdNewObj) { |
| 2763 |
|
Tcl_DecrRefCount(varValuePtr); /* free unneeded obj. */ |
| 2764 |
|
} |
| 2765 |
|
return result; |
| 2766 |
|
} |
| 2767 |
|
} |
| 2768 |
|
listRepPtr = (List *) varValuePtr->internalRep.otherValuePtr; |
| 2769 |
|
elemPtrs = listRepPtr->elements; |
| 2770 |
|
numElems = listRepPtr->elemCount; |
| 2771 |
|
|
| 2772 |
|
/* |
| 2773 |
|
* If there is no room in the current array of element pointers, |
| 2774 |
|
* allocate a new, larger array and copy the pointers to it. |
| 2775 |
|
*/ |
| 2776 |
|
|
| 2777 |
|
numRequired = numElems + (objc-2); |
| 2778 |
|
if (numRequired > listRepPtr->maxElemCount) { |
| 2779 |
|
int newMax = (2 * numRequired); |
| 2780 |
|
Tcl_Obj **newElemPtrs = (Tcl_Obj **) |
| 2781 |
|
ckalloc((unsigned) (newMax * sizeof(Tcl_Obj *))); |
| 2782 |
|
|
| 2783 |
|
memcpy((VOID *) newElemPtrs, (VOID *) elemPtrs, |
| 2784 |
|
(size_t) (numElems * sizeof(Tcl_Obj *))); |
| 2785 |
|
listRepPtr->maxElemCount = newMax; |
| 2786 |
|
listRepPtr->elements = newElemPtrs; |
| 2787 |
|
ckfree((char *) elemPtrs); |
| 2788 |
|
elemPtrs = newElemPtrs; |
| 2789 |
|
} |
| 2790 |
|
|
| 2791 |
|
/* |
| 2792 |
|
* Insert the new elements at the end of the list. |
| 2793 |
|
*/ |
| 2794 |
|
|
| 2795 |
|
for (i = 2, j = numElems; i < objc; i++, j++) { |
| 2796 |
|
elemPtrs[j] = objv[i]; |
| 2797 |
|
Tcl_IncrRefCount(objv[i]); |
| 2798 |
|
} |
| 2799 |
|
listRepPtr->elemCount = numRequired; |
| 2800 |
|
|
| 2801 |
|
/* |
| 2802 |
|
* Invalidate and free any old string representation since it no |
| 2803 |
|
* longer reflects the list's internal representation. |
| 2804 |
|
*/ |
| 2805 |
|
|
| 2806 |
|
Tcl_InvalidateStringRep(varValuePtr); |
| 2807 |
|
|
| 2808 |
|
/* |
| 2809 |
|
* Now store the list object back into the variable. If there is an |
| 2810 |
|
* error setting the new value, decrement its ref count if it |
| 2811 |
|
* was new and we didn't create the variable. |
| 2812 |
|
*/ |
| 2813 |
|
|
| 2814 |
|
newValuePtr = Tcl_ObjSetVar2(interp, objv[1], NULL, varValuePtr, |
| 2815 |
|
TCL_LEAVE_ERR_MSG); |
| 2816 |
|
if (newValuePtr == NULL) { |
| 2817 |
|
if (createdNewObj && !createVar) { |
| 2818 |
|
Tcl_DecrRefCount(varValuePtr); /* free unneeded obj */ |
| 2819 |
|
} |
| 2820 |
|
return TCL_ERROR; |
| 2821 |
|
} |
| 2822 |
|
} |
| 2823 |
|
|
| 2824 |
|
/* |
| 2825 |
|
* Set the interpreter's object result to refer to the variable's value |
| 2826 |
|
* object. |
| 2827 |
|
*/ |
| 2828 |
|
|
| 2829 |
|
Tcl_SetObjResult(interp, newValuePtr); |
| 2830 |
|
return TCL_OK; |
| 2831 |
|
} |
| 2832 |
|
|
| 2833 |
|
/* |
| 2834 |
|
*---------------------------------------------------------------------- |
| 2835 |
|
* |
| 2836 |
|
* Tcl_ArrayObjCmd -- |
| 2837 |
|
* |
| 2838 |
|
* This object-based procedure is invoked to process the "array" Tcl |
| 2839 |
|
* command. See the user documentation for details on what it does. |
| 2840 |
|
* |
| 2841 |
|
* Results: |
| 2842 |
|
* A standard Tcl result object. |
| 2843 |
|
* |
| 2844 |
|
* Side effects: |
| 2845 |
|
* See the user documentation. |
| 2846 |
|
* |
| 2847 |
|
*---------------------------------------------------------------------- |
| 2848 |
|
*/ |
| 2849 |
|
|
| 2850 |
|
/* ARGSUSED */ |
| 2851 |
|
int |
| 2852 |
|
Tcl_ArrayObjCmd(dummy, interp, objc, objv) |
| 2853 |
|
ClientData dummy; /* Not used. */ |
| 2854 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 2855 |
|
int objc; /* Number of arguments. */ |
| 2856 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 2857 |
|
{ |
| 2858 |
|
/* |
| 2859 |
|
* The list of constants below should match the arrayOptions string array |
| 2860 |
|
* below. |
| 2861 |
|
*/ |
| 2862 |
|
|
| 2863 |
|
enum {ARRAY_ANYMORE, ARRAY_DONESEARCH, ARRAY_EXISTS, ARRAY_GET, |
| 2864 |
|
ARRAY_NAMES, ARRAY_NEXTELEMENT, ARRAY_SET, ARRAY_SIZE, |
| 2865 |
|
ARRAY_STARTSEARCH, ARRAY_UNSET}; |
| 2866 |
|
static char *arrayOptions[] = { |
| 2867 |
|
"anymore", "donesearch", "exists", "get", "names", "nextelement", |
| 2868 |
|
"set", "size", "startsearch", "unset", (char *) NULL |
| 2869 |
|
}; |
| 2870 |
|
|
| 2871 |
|
Interp *iPtr = (Interp *) interp; |
| 2872 |
|
Var *varPtr, *arrayPtr; |
| 2873 |
|
Tcl_HashEntry *hPtr; |
| 2874 |
|
Tcl_Obj *resultPtr = Tcl_GetObjResult(interp); |
| 2875 |
|
int notArray; |
| 2876 |
|
char *varName, *msg; |
| 2877 |
|
int index, result; |
| 2878 |
|
|
| 2879 |
|
|
| 2880 |
|
if (objc < 3) { |
| 2881 |
|
Tcl_WrongNumArgs(interp, 1, objv, "option arrayName ?arg ...?"); |
| 2882 |
|
return TCL_ERROR; |
| 2883 |
|
} |
| 2884 |
|
|
| 2885 |
|
if (Tcl_GetIndexFromObj(interp, objv[1], arrayOptions, "option", |
| 2886 |
|
0, &index) != TCL_OK) { |
| 2887 |
|
return TCL_ERROR; |
| 2888 |
|
} |
| 2889 |
|
|
| 2890 |
|
/* |
| 2891 |
|
* Locate the array variable (and it better be an array). |
| 2892 |
|
*/ |
| 2893 |
|
|
| 2894 |
|
varName = TclGetString(objv[2]); |
| 2895 |
|
varPtr = TclLookupVar(interp, varName, (char *) NULL, /*flags*/ 0, |
| 2896 |
|
/*msg*/ 0, /*createPart1*/ 0, /*createPart2*/ 0, &arrayPtr); |
| 2897 |
|
|
| 2898 |
|
notArray = 0; |
| 2899 |
|
if ((varPtr == NULL) || !TclIsVarArray(varPtr) |
| 2900 |
|
|| TclIsVarUndefined(varPtr)) { |
| 2901 |
|
notArray = 1; |
| 2902 |
|
} |
| 2903 |
|
|
| 2904 |
|
/* |
| 2905 |
|
* Special array trace used to keep the env array in sync for |
| 2906 |
|
* array names, array get, etc. |
| 2907 |
|
*/ |
| 2908 |
|
|
| 2909 |
|
if (varPtr != NULL && varPtr->tracePtr != NULL) { |
| 2910 |
|
msg = CallTraces(iPtr, arrayPtr, varPtr, varName, NULL, |
| 2911 |
|
(TCL_LEAVE_ERR_MSG|TCL_NAMESPACE_ONLY|TCL_GLOBAL_ONLY| |
| 2912 |
|
TCL_TRACE_ARRAY)); |
| 2913 |
|
if (msg != NULL) { |
| 2914 |
|
VarErrMsg(interp, varName, NULL, "trace array", msg); |
| 2915 |
|
return TCL_ERROR; |
| 2916 |
|
} |
| 2917 |
|
} |
| 2918 |
|
|
| 2919 |
|
switch (index) { |
| 2920 |
|
case ARRAY_ANYMORE: { |
| 2921 |
|
ArraySearch *searchPtr; |
| 2922 |
|
char *searchId; |
| 2923 |
|
|
| 2924 |
|
if (objc != 4) { |
| 2925 |
|
Tcl_WrongNumArgs(interp, 2, objv, |
| 2926 |
|
"arrayName searchId"); |
| 2927 |
|
return TCL_ERROR; |
| 2928 |
|
} |
| 2929 |
|
if (notArray) { |
| 2930 |
|
goto error; |
| 2931 |
|
} |
| 2932 |
|
searchId = Tcl_GetString(objv[3]); |
| 2933 |
|
searchPtr = ParseSearchId(interp, varPtr, varName, searchId); |
| 2934 |
|
if (searchPtr == NULL) { |
| 2935 |
|
return TCL_ERROR; |
| 2936 |
|
} |
| 2937 |
|
while (1) { |
| 2938 |
|
Var *varPtr2; |
| 2939 |
|
|
| 2940 |
|
if (searchPtr->nextEntry != NULL) { |
| 2941 |
|
varPtr2 = (Var *) Tcl_GetHashValue(searchPtr->nextEntry); |
| 2942 |
|
if (!TclIsVarUndefined(varPtr2)) { |
| 2943 |
|
break; |
| 2944 |
|
} |
| 2945 |
|
} |
| 2946 |
|
searchPtr->nextEntry = Tcl_NextHashEntry(&searchPtr->search); |
| 2947 |
|
if (searchPtr->nextEntry == NULL) { |
| 2948 |
|
Tcl_SetIntObj(resultPtr, 0); |
| 2949 |
|
return TCL_OK; |
| 2950 |
|
} |
| 2951 |
|
} |
| 2952 |
|
Tcl_SetIntObj(resultPtr, 1); |
| 2953 |
|
break; |
| 2954 |
|
} |
| 2955 |
|
case ARRAY_DONESEARCH: { |
| 2956 |
|
ArraySearch *searchPtr, *prevPtr; |
| 2957 |
|
char *searchId; |
| 2958 |
|
|
| 2959 |
|
if (objc != 4) { |
| 2960 |
|
Tcl_WrongNumArgs(interp, 2, objv, |
| 2961 |
|
"arrayName searchId"); |
| 2962 |
|
return TCL_ERROR; |
| 2963 |
|
} |
| 2964 |
|
if (notArray) { |
| 2965 |
|
goto error; |
| 2966 |
|
} |
| 2967 |
|
searchId = Tcl_GetString(objv[3]); |
| 2968 |
|
searchPtr = ParseSearchId(interp, varPtr, varName, searchId); |
| 2969 |
|
if (searchPtr == NULL) { |
| 2970 |
|
return TCL_ERROR; |
| 2971 |
|
} |
| 2972 |
|
if (varPtr->searchPtr == searchPtr) { |
| 2973 |
|
varPtr->searchPtr = searchPtr->nextPtr; |
| 2974 |
|
} else { |
| 2975 |
|
for (prevPtr = varPtr->searchPtr; ; |
| 2976 |
|
prevPtr = prevPtr->nextPtr) { |
| 2977 |
|
if (prevPtr->nextPtr == searchPtr) { |
| 2978 |
|
prevPtr->nextPtr = searchPtr->nextPtr; |
| 2979 |
|
break; |
| 2980 |
|
} |
| 2981 |
|
} |
| 2982 |
|
} |
| 2983 |
|
ckfree((char *) searchPtr); |
| 2984 |
|
break; |
| 2985 |
|
} |
| 2986 |
|
case ARRAY_EXISTS: { |
| 2987 |
|
if (objc != 3) { |
| 2988 |
|
Tcl_WrongNumArgs(interp, 2, objv, "arrayName"); |
| 2989 |
|
return TCL_ERROR; |
| 2990 |
|
} |
| 2991 |
|
Tcl_SetIntObj(resultPtr, !notArray); |
| 2992 |
|
break; |
| 2993 |
|
} |
| 2994 |
|
case ARRAY_GET: { |
| 2995 |
|
Tcl_HashSearch search; |
| 2996 |
|
Var *varPtr2; |
| 2997 |
|
char *pattern = NULL; |
| 2998 |
|
char *name; |
| 2999 |
|
Tcl_Obj *namePtr, *valuePtr; |
| 3000 |
|
|
| 3001 |
|
if ((objc != 3) && (objc != 4)) { |
| 3002 |
|
Tcl_WrongNumArgs(interp, 2, objv, "arrayName ?pattern?"); |
| 3003 |
|
return TCL_ERROR; |
| 3004 |
|
} |
| 3005 |
|
if (notArray) { |
| 3006 |
|
return TCL_OK; |
| 3007 |
|
} |
| 3008 |
|
if (objc == 4) { |
| 3009 |
|
pattern = TclGetString(objv[3]); |
| 3010 |
|
} |
| 3011 |
|
for (hPtr = Tcl_FirstHashEntry(varPtr->value.tablePtr, &search); |
| 3012 |
|
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { |
| 3013 |
|
varPtr2 = (Var *) Tcl_GetHashValue(hPtr); |
| 3014 |
|
if (TclIsVarUndefined(varPtr2)) { |
| 3015 |
|
continue; |
| 3016 |
|
} |
| 3017 |
|
name = Tcl_GetHashKey(varPtr->value.tablePtr, hPtr); |
| 3018 |
|
if ((objc == 4) && !Tcl_StringMatch(name, pattern)) { |
| 3019 |
|
continue; /* element name doesn't match pattern */ |
| 3020 |
|
} |
| 3021 |
|
|
| 3022 |
|
namePtr = Tcl_NewStringObj(name, -1); |
| 3023 |
|
result = Tcl_ListObjAppendElement(interp, resultPtr, |
| 3024 |
|
namePtr); |
| 3025 |
|
if (result != TCL_OK) { |
| 3026 |
|
Tcl_DecrRefCount(namePtr); /* free unneeded name obj */ |
| 3027 |
|
return result; |
| 3028 |
|
} |
| 3029 |
|
|
| 3030 |
|
valuePtr = Tcl_ObjGetVar2(interp, objv[2], namePtr, |
| 3031 |
|
TCL_LEAVE_ERR_MSG); |
| 3032 |
|
if (valuePtr == NULL) { |
| 3033 |
|
Tcl_DecrRefCount(namePtr); /* free unneeded name obj */ |
| 3034 |
|
return result; |
| 3035 |
|
} |
| 3036 |
|
result = Tcl_ListObjAppendElement(interp, resultPtr, |
| 3037 |
|
valuePtr); |
| 3038 |
|
if (result != TCL_OK) { |
| 3039 |
|
Tcl_DecrRefCount(namePtr); /* free unneeded name obj */ |
| 3040 |
|
return result; |
| 3041 |
|
} |
| 3042 |
|
} |
| 3043 |
|
break; |
| 3044 |
|
} |
| 3045 |
|
case ARRAY_NAMES: { |
| 3046 |
|
Tcl_HashSearch search; |
| 3047 |
|
Var *varPtr2; |
| 3048 |
|
char *pattern = NULL; |
| 3049 |
|
char *name; |
| 3050 |
|
Tcl_Obj *namePtr; |
| 3051 |
|
|
| 3052 |
|
if ((objc != 3) && (objc != 4)) { |
| 3053 |
|
Tcl_WrongNumArgs(interp, 2, objv, "arrayName ?pattern?"); |
| 3054 |
|
return TCL_ERROR; |
| 3055 |
|
} |
| 3056 |
|
if (notArray) { |
| 3057 |
|
return TCL_OK; |
| 3058 |
|
} |
| 3059 |
|
if (objc == 4) { |
| 3060 |
|
pattern = Tcl_GetString(objv[3]); |
| 3061 |
|
} |
| 3062 |
|
for (hPtr = Tcl_FirstHashEntry(varPtr->value.tablePtr, &search); |
| 3063 |
|
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { |
| 3064 |
|
varPtr2 = (Var *) Tcl_GetHashValue(hPtr); |
| 3065 |
|
if (TclIsVarUndefined(varPtr2)) { |
| 3066 |
|
continue; |
| 3067 |
|
} |
| 3068 |
|
name = Tcl_GetHashKey(varPtr->value.tablePtr, hPtr); |
| 3069 |
|
if ((objc == 4) && !Tcl_StringMatch(name, pattern)) { |
| 3070 |
|
continue; /* element name doesn't match pattern */ |
| 3071 |
|
} |
| 3072 |
|
|
| 3073 |
|
namePtr = Tcl_NewStringObj(name, -1); |
| 3074 |
|
result = Tcl_ListObjAppendElement(interp, resultPtr, namePtr); |
| 3075 |
|
if (result != TCL_OK) { |
| 3076 |
|
Tcl_DecrRefCount(namePtr); /* free unneeded name obj */ |
| 3077 |
|
return result; |
| 3078 |
|
} |
| 3079 |
|
} |
| 3080 |
|
break; |
| 3081 |
|
} |
| 3082 |
|
case ARRAY_NEXTELEMENT: { |
| 3083 |
|
ArraySearch *searchPtr; |
| 3084 |
|
char *searchId; |
| 3085 |
|
Tcl_HashEntry *hPtr; |
| 3086 |
|
|
| 3087 |
|
if (objc != 4) { |
| 3088 |
|
Tcl_WrongNumArgs(interp, 2, objv, |
| 3089 |
|
"arrayName searchId"); |
| 3090 |
|
return TCL_ERROR; |
| 3091 |
|
} |
| 3092 |
|
if (notArray) { |
| 3093 |
|
goto error; |
| 3094 |
|
} |
| 3095 |
|
searchId = Tcl_GetString(objv[3]); |
| 3096 |
|
searchPtr = ParseSearchId(interp, varPtr, varName, searchId); |
| 3097 |
|
if (searchPtr == NULL) { |
| 3098 |
|
return TCL_ERROR; |
| 3099 |
|
} |
| 3100 |
|
while (1) { |
| 3101 |
|
Var *varPtr2; |
| 3102 |
|
|
| 3103 |
|
hPtr = searchPtr->nextEntry; |
| 3104 |
|
if (hPtr == NULL) { |
| 3105 |
|
hPtr = Tcl_NextHashEntry(&searchPtr->search); |
| 3106 |
|
if (hPtr == NULL) { |
| 3107 |
|
return TCL_OK; |
| 3108 |
|
} |
| 3109 |
|
} else { |
| 3110 |
|
searchPtr->nextEntry = NULL; |
| 3111 |
|
} |
| 3112 |
|
varPtr2 = (Var *) Tcl_GetHashValue(hPtr); |
| 3113 |
|
if (!TclIsVarUndefined(varPtr2)) { |
| 3114 |
|
break; |
| 3115 |
|
} |
| 3116 |
|
} |
| 3117 |
|
Tcl_SetStringObj(resultPtr, |
| 3118 |
|
Tcl_GetHashKey(varPtr->value.tablePtr, hPtr), -1); |
| 3119 |
|
break; |
| 3120 |
|
} |
| 3121 |
|
case ARRAY_SET: { |
| 3122 |
|
if (objc != 4) { |
| 3123 |
|
Tcl_WrongNumArgs(interp, 2, objv, "arrayName list"); |
| 3124 |
|
return TCL_ERROR; |
| 3125 |
|
} |
| 3126 |
|
return(TclArraySet(interp, objv[2], objv[3])); |
| 3127 |
|
} |
| 3128 |
|
case ARRAY_SIZE: { |
| 3129 |
|
Tcl_HashSearch search; |
| 3130 |
|
Var *varPtr2; |
| 3131 |
|
int size; |
| 3132 |
|
|
| 3133 |
|
if (objc != 3) { |
| 3134 |
|
Tcl_WrongNumArgs(interp, 2, objv, "arrayName"); |
| 3135 |
|
return TCL_ERROR; |
| 3136 |
|
} |
| 3137 |
|
size = 0; |
| 3138 |
|
if (!notArray) { |
| 3139 |
|
for (hPtr = Tcl_FirstHashEntry(varPtr->value.tablePtr, |
| 3140 |
|
&search); |
| 3141 |
|
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { |
| 3142 |
|
varPtr2 = (Var *) Tcl_GetHashValue(hPtr); |
| 3143 |
|
if (TclIsVarUndefined(varPtr2)) { |
| 3144 |
|
continue; |
| 3145 |
|
} |
| 3146 |
|
size++; |
| 3147 |
|
} |
| 3148 |
|
} |
| 3149 |
|
Tcl_SetIntObj(resultPtr, size); |
| 3150 |
|
break; |
| 3151 |
|
} |
| 3152 |
|
case ARRAY_STARTSEARCH: { |
| 3153 |
|
ArraySearch *searchPtr; |
| 3154 |
|
|
| 3155 |
|
if (objc != 3) { |
| 3156 |
|
Tcl_WrongNumArgs(interp, 2, objv, "arrayName"); |
| 3157 |
|
return TCL_ERROR; |
| 3158 |
|
} |
| 3159 |
|
if (notArray) { |
| 3160 |
|
goto error; |
| 3161 |
|
} |
| 3162 |
|
searchPtr = (ArraySearch *) ckalloc(sizeof(ArraySearch)); |
| 3163 |
|
if (varPtr->searchPtr == NULL) { |
| 3164 |
|
searchPtr->id = 1; |
| 3165 |
|
Tcl_AppendStringsToObj(resultPtr, "s-1-", varName, |
| 3166 |
|
(char *) NULL); |
| 3167 |
|
} else { |
| 3168 |
|
char string[TCL_INTEGER_SPACE]; |
| 3169 |
|
|
| 3170 |
|
searchPtr->id = varPtr->searchPtr->id + 1; |
| 3171 |
|
TclFormatInt(string, searchPtr->id); |
| 3172 |
|
Tcl_AppendStringsToObj(resultPtr, "s-", string, "-", varName, |
| 3173 |
|
(char *) NULL); |
| 3174 |
|
} |
| 3175 |
|
searchPtr->varPtr = varPtr; |
| 3176 |
|
searchPtr->nextEntry = Tcl_FirstHashEntry(varPtr->value.tablePtr, |
| 3177 |
|
&searchPtr->search); |
| 3178 |
|
searchPtr->nextPtr = varPtr->searchPtr; |
| 3179 |
|
varPtr->searchPtr = searchPtr; |
| 3180 |
|
break; |
| 3181 |
|
} |
| 3182 |
|
case ARRAY_UNSET: { |
| 3183 |
|
Tcl_HashSearch search; |
| 3184 |
|
Var *varPtr2; |
| 3185 |
|
char *pattern = NULL; |
| 3186 |
|
char *name; |
| 3187 |
|
|
| 3188 |
|
if ((objc != 3) && (objc != 4)) { |
| 3189 |
|
Tcl_WrongNumArgs(interp, 2, objv, "arrayName ?pattern?"); |
| 3190 |
|
return TCL_ERROR; |
| 3191 |
|
} |
| 3192 |
|
if (notArray) { |
| 3193 |
|
return TCL_OK; |
| 3194 |
|
} |
| 3195 |
|
if (objc == 3) { |
| 3196 |
|
/* |
| 3197 |
|
* When no pattern is given, just unset the whole array |
| 3198 |
|
*/ |
| 3199 |
|
if (Tcl_UnsetVar2(interp, varName, (char *) NULL, 0) |
| 3200 |
|
!= TCL_OK) { |
| 3201 |
|
return TCL_ERROR; |
| 3202 |
|
} |
| 3203 |
|
} else { |
| 3204 |
|
pattern = Tcl_GetString(objv[3]); |
| 3205 |
|
for (hPtr = Tcl_FirstHashEntry(varPtr->value.tablePtr, |
| 3206 |
|
&search); |
| 3207 |
|
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { |
| 3208 |
|
varPtr2 = (Var *) Tcl_GetHashValue(hPtr); |
| 3209 |
|
if (TclIsVarUndefined(varPtr2)) { |
| 3210 |
|
continue; |
| 3211 |
|
} |
| 3212 |
|
name = Tcl_GetHashKey(varPtr->value.tablePtr, hPtr); |
| 3213 |
|
if (Tcl_StringMatch(name, pattern) && |
| 3214 |
|
(Tcl_UnsetVar2(interp, varName, name, 0) |
| 3215 |
|
!= TCL_OK)) { |
| 3216 |
|
return TCL_ERROR; |
| 3217 |
|
} |
| 3218 |
|
} |
| 3219 |
|
} |
| 3220 |
|
break; |
| 3221 |
|
} |
| 3222 |
|
} |
| 3223 |
|
return TCL_OK; |
| 3224 |
|
|
| 3225 |
|
error: |
| 3226 |
|
Tcl_AppendStringsToObj(resultPtr, "\"", varName, "\" isn't an array", |
| 3227 |
|
(char *) NULL); |
| 3228 |
|
return TCL_ERROR; |
| 3229 |
|
} |
| 3230 |
|
|
| 3231 |
|
/* |
| 3232 |
|
*---------------------------------------------------------------------- |
| 3233 |
|
* |
| 3234 |
|
* TclArraySet -- |
| 3235 |
|
* |
| 3236 |
|
* Set the elements of an array. If there are no elements to |
| 3237 |
|
* set, create an empty array. This routine is used by the |
| 3238 |
|
* Tcl_ArrayObjCmd and by the TclSetupEnv routine. |
| 3239 |
|
* |
| 3240 |
|
* Results: |
| 3241 |
|
* A standard Tcl result object. |
| 3242 |
|
* |
| 3243 |
|
* Side effects: |
| 3244 |
|
* A variable will be created if one does not already exist. |
| 3245 |
|
* |
| 3246 |
|
*---------------------------------------------------------------------- |
| 3247 |
|
*/ |
| 3248 |
|
|
| 3249 |
|
int |
| 3250 |
|
TclArraySet(interp, arrayNameObj, arrayElemObj) |
| 3251 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 3252 |
|
Tcl_Obj *arrayNameObj; /* The array name. */ |
| 3253 |
|
Tcl_Obj *arrayElemObj; /* The array elements list. If this is |
| 3254 |
|
* NULL, create an empty array. */ |
| 3255 |
|
{ |
| 3256 |
|
Var *varPtr, *arrayPtr; |
| 3257 |
|
Tcl_Obj **elemPtrs; |
| 3258 |
|
int result, elemLen, i; |
| 3259 |
|
char *varName, *p; |
| 3260 |
|
|
| 3261 |
|
varName = TclGetString(arrayNameObj); |
| 3262 |
|
for (p = varName; *p ; p++) { |
| 3263 |
|
if (*p == '(') { |
| 3264 |
|
do { |
| 3265 |
|
p++; |
| 3266 |
|
} while (*p != '\0'); |
| 3267 |
|
p--; |
| 3268 |
|
if (*p == ')') { |
| 3269 |
|
VarErrMsg(interp, varName, NULL, "set", needArray); |
| 3270 |
|
return TCL_ERROR; |
| 3271 |
|
} |
| 3272 |
|
break; |
| 3273 |
|
} |
| 3274 |
|
} |
| 3275 |
|
|
| 3276 |
|
varPtr = TclLookupVar(interp, varName, (char *) NULL, /*flags*/ 0, |
| 3277 |
|
/*msg*/ 0, /*createPart1*/ 0, /*createPart2*/ 0, &arrayPtr); |
| 3278 |
|
|
| 3279 |
|
if (arrayElemObj != NULL) { |
| 3280 |
|
result = Tcl_ListObjGetElements(interp, arrayElemObj, |
| 3281 |
|
&elemLen, &elemPtrs); |
| 3282 |
|
if (result != TCL_OK) { |
| 3283 |
|
return result; |
| 3284 |
|
} |
| 3285 |
|
if (elemLen & 1) { |
| 3286 |
|
Tcl_ResetResult(interp); |
| 3287 |
|
Tcl_AppendToObj(Tcl_GetObjResult(interp), |
| 3288 |
|
"list must have an even number of elements", -1); |
| 3289 |
|
return TCL_ERROR; |
| 3290 |
|
} |
| 3291 |
|
if (elemLen > 0) { |
| 3292 |
|
for (i = 0; i < elemLen; i += 2) { |
| 3293 |
|
if (Tcl_ObjSetVar2(interp, arrayNameObj, elemPtrs[i], |
| 3294 |
|
elemPtrs[i+1], TCL_LEAVE_ERR_MSG) == NULL) { |
| 3295 |
|
result = TCL_ERROR; |
| 3296 |
|
break; |
| 3297 |
|
} |
| 3298 |
|
} |
| 3299 |
|
return result; |
| 3300 |
|
} |
| 3301 |
|
} |
| 3302 |
|
|
| 3303 |
|
/* |
| 3304 |
|
* The list is empty make sure we have an array, or create |
| 3305 |
|
* one if necessary. |
| 3306 |
|
*/ |
| 3307 |
|
|
| 3308 |
|
if (varPtr != NULL) { |
| 3309 |
|
if (!TclIsVarUndefined(varPtr) && TclIsVarArray(varPtr)) { |
| 3310 |
|
/* |
| 3311 |
|
* Already an array, done. |
| 3312 |
|
*/ |
| 3313 |
|
|
| 3314 |
|
return TCL_OK; |
| 3315 |
|
} |
| 3316 |
|
if (TclIsVarArrayElement(varPtr) || !TclIsVarUndefined(varPtr)) { |
| 3317 |
|
/* |
| 3318 |
|
* Either an array element, or a scalar: lose! |
| 3319 |
|
*/ |
| 3320 |
|
|
| 3321 |
|
VarErrMsg(interp, varName, (char *)NULL, "array set", needArray); |
| 3322 |
|
return TCL_ERROR; |
| 3323 |
|
} |
| 3324 |
|
} else { |
| 3325 |
|
/* |
| 3326 |
|
* Create variable for new array. |
| 3327 |
|
*/ |
| 3328 |
|
|
| 3329 |
|
varPtr = TclLookupVar(interp, varName, (char *) NULL, |
| 3330 |
|
TCL_LEAVE_ERR_MSG, "set", |
| 3331 |
|
/*createPart1*/ 1, /*createPart2*/ 0, &arrayPtr); |
| 3332 |
|
|
| 3333 |
|
/* |
| 3334 |
|
* Still couldn't do it - this can occur if a non-existent |
| 3335 |
|
* namespace was specified |
| 3336 |
|
*/ |
| 3337 |
|
if (varPtr == NULL) { |
| 3338 |
|
return TCL_ERROR; |
| 3339 |
|
} |
| 3340 |
|
} |
| 3341 |
|
TclSetVarArray(varPtr); |
| 3342 |
|
TclClearVarUndefined(varPtr); |
| 3343 |
|
varPtr->value.tablePtr = |
| 3344 |
|
(Tcl_HashTable *) ckalloc(sizeof(Tcl_HashTable)); |
| 3345 |
|
Tcl_InitHashTable(varPtr->value.tablePtr, TCL_STRING_KEYS); |
| 3346 |
|
return TCL_OK; |
| 3347 |
|
} |
| 3348 |
|
|
| 3349 |
|
/* |
| 3350 |
|
*---------------------------------------------------------------------- |
| 3351 |
|
* |
| 3352 |
|
* MakeUpvar -- |
| 3353 |
|
* |
| 3354 |
|
* This procedure does all of the work of the "global" and "upvar" |
| 3355 |
|
* commands. |
| 3356 |
|
* |
| 3357 |
|
* Results: |
| 3358 |
|
* A standard Tcl completion code. If an error occurs then an |
| 3359 |
|
* error message is left in iPtr->result. |
| 3360 |
|
* |
| 3361 |
|
* Side effects: |
| 3362 |
|
* The variable given by myName is linked to the variable in framePtr |
| 3363 |
|
* given by otherP1 and otherP2, so that references to myName are |
| 3364 |
|
* redirected to the other variable like a symbolic link. |
| 3365 |
|
* |
| 3366 |
|
*---------------------------------------------------------------------- |
| 3367 |
|
*/ |
| 3368 |
|
|
| 3369 |
|
static int |
| 3370 |
|
MakeUpvar(iPtr, framePtr, otherP1, otherP2, otherFlags, myName, myFlags) |
| 3371 |
|
Interp *iPtr; /* Interpreter containing variables. Used |
| 3372 |
|
* for error messages, too. */ |
| 3373 |
|
CallFrame *framePtr; /* Call frame containing "other" variable. |
| 3374 |
|
* NULL means use global :: context. */ |
| 3375 |
|
char *otherP1, *otherP2; /* Two-part name of variable in framePtr. */ |
| 3376 |
|
int otherFlags; /* 0, TCL_GLOBAL_ONLY or TCL_NAMESPACE_ONLY: |
| 3377 |
|
* indicates scope of "other" variable. */ |
| 3378 |
|
char *myName; /* Name of variable which will refer to |
| 3379 |
|
* otherP1/otherP2. Must be a scalar. */ |
| 3380 |
|
int myFlags; /* 0, TCL_GLOBAL_ONLY or TCL_NAMESPACE_ONLY: |
| 3381 |
|
* indicates scope of myName. */ |
| 3382 |
|
{ |
| 3383 |
|
Tcl_HashEntry *hPtr; |
| 3384 |
|
Var *otherPtr, *varPtr, *arrayPtr; |
| 3385 |
|
CallFrame *varFramePtr; |
| 3386 |
|
CallFrame *savedFramePtr = NULL; /* Init. to avoid compiler warning. */ |
| 3387 |
|
Tcl_HashTable *tablePtr; |
| 3388 |
|
Namespace *nsPtr, *altNsPtr, *dummyNsPtr; |
| 3389 |
|
char *tail; |
| 3390 |
|
int new; |
| 3391 |
|
|
| 3392 |
|
/* |
| 3393 |
|
* Find "other" in "framePtr". If not looking up other in just the |
| 3394 |
|
* current namespace, temporarily replace the current var frame |
| 3395 |
|
* pointer in the interpreter in order to use TclLookupVar. |
| 3396 |
|
*/ |
| 3397 |
|
|
| 3398 |
|
if (!(otherFlags & TCL_NAMESPACE_ONLY)) { |
| 3399 |
|
savedFramePtr = iPtr->varFramePtr; |
| 3400 |
|
iPtr->varFramePtr = framePtr; |
| 3401 |
|
} |
| 3402 |
|
otherPtr = TclLookupVar((Tcl_Interp *) iPtr, otherP1, otherP2, |
| 3403 |
|
(otherFlags | TCL_LEAVE_ERR_MSG), "access", |
| 3404 |
|
/*createPart1*/ 1, /*createPart2*/ 1, &arrayPtr); |
| 3405 |
|
if (!(otherFlags & TCL_NAMESPACE_ONLY)) { |
| 3406 |
|
iPtr->varFramePtr = savedFramePtr; |
| 3407 |
|
} |
| 3408 |
|
if (otherPtr == NULL) { |
| 3409 |
|
return TCL_ERROR; |
| 3410 |
|
} |
| 3411 |
|
|
| 3412 |
|
/* |
| 3413 |
|
* Now create a hashtable entry for "myName". Create it as either a |
| 3414 |
|
* namespace variable or as a local variable in a procedure call |
| 3415 |
|
* frame. Interpret myName as a namespace variable if: |
| 3416 |
|
* 1) so requested by a TCL_GLOBAL_ONLY or TCL_NAMESPACE_ONLY flag, |
| 3417 |
|
* 2) there is no active frame (we're at the global :: scope), |
| 3418 |
|
* 3) the active frame was pushed to define the namespace context |
| 3419 |
|
* for a "namespace eval" or "namespace inscope" command, |
| 3420 |
|
* 4) the name has namespace qualifiers ("::"s). |
| 3421 |
|
* If creating myName in the active procedure, look first in the |
| 3422 |
|
* frame's array of compiler-allocated local variables, then in its |
| 3423 |
|
* hashtable for runtime-created local variables. Create that |
| 3424 |
|
* procedure's local variable hashtable if necessary. |
| 3425 |
|
*/ |
| 3426 |
|
|
| 3427 |
|
varFramePtr = iPtr->varFramePtr; |
| 3428 |
|
if ((myFlags & (TCL_GLOBAL_ONLY | TCL_NAMESPACE_ONLY)) |
| 3429 |
|
|| (varFramePtr == NULL) |
| 3430 |
|
|| !varFramePtr->isProcCallFrame |
| 3431 |
|
|| (strstr(myName, "::") != NULL)) { |
| 3432 |
|
TclGetNamespaceForQualName((Tcl_Interp *) iPtr, myName, |
| 3433 |
|
(Namespace *) NULL, myFlags, &nsPtr, &altNsPtr, &dummyNsPtr, &tail); |
| 3434 |
|
|
| 3435 |
|
if (nsPtr == NULL) { |
| 3436 |
|
nsPtr = altNsPtr; |
| 3437 |
|
} |
| 3438 |
|
if (nsPtr == NULL) { |
| 3439 |
|
Tcl_AppendResult((Tcl_Interp *) iPtr, "bad variable name \"", |
| 3440 |
|
myName, "\": unknown namespace", (char *) NULL); |
| 3441 |
|
return TCL_ERROR; |
| 3442 |
|
} |
| 3443 |
|
|
| 3444 |
|
/* |
| 3445 |
|
* Check that we are not trying to create a namespace var linked to |
| 3446 |
|
* a local variable in a procedure. If we allowed this, the local |
| 3447 |
|
* variable in the shorter-lived procedure frame could go away |
| 3448 |
|
* leaving the namespace var's reference invalid. |
| 3449 |
|
*/ |
| 3450 |
|
|
| 3451 |
|
if ((otherP2 ? arrayPtr->nsPtr : otherPtr->nsPtr) == NULL) { |
| 3452 |
|
Tcl_AppendResult((Tcl_Interp *) iPtr, "bad variable name \"", |
| 3453 |
|
myName, "\": upvar won't create namespace variable that refers to procedure variable", |
| 3454 |
|
(char *) NULL); |
| 3455 |
|
return TCL_ERROR; |
| 3456 |
|
} |
| 3457 |
|
|
| 3458 |
|
hPtr = Tcl_CreateHashEntry(&nsPtr->varTable, tail, &new); |
| 3459 |
|
if (new) { |
| 3460 |
|
varPtr = NewVar(); |
| 3461 |
|
Tcl_SetHashValue(hPtr, varPtr); |
| 3462 |
|
varPtr->hPtr = hPtr; |
| 3463 |
|
varPtr->nsPtr = nsPtr; |
| 3464 |
|
} else { |
| 3465 |
|
varPtr = (Var *) Tcl_GetHashValue(hPtr); |
| 3466 |
|
} |
| 3467 |
|
} else { /* look in the call frame */ |
| 3468 |
|
Proc *procPtr = varFramePtr->procPtr; |
| 3469 |
|
int localCt = procPtr->numCompiledLocals; |
| 3470 |
|
CompiledLocal *localPtr = procPtr->firstLocalPtr; |
| 3471 |
|
Var *localVarPtr = varFramePtr->compiledLocals; |
| 3472 |
|
int nameLen = strlen(myName); |
| 3473 |
|
int i; |
| 3474 |
|
|
| 3475 |
|
varPtr = NULL; |
| 3476 |
|
for (i = 0; i < localCt; i++) { |
| 3477 |
|
if (!TclIsVarTemporary(localPtr)) { |
| 3478 |
|
char *localName = localVarPtr->name; |
| 3479 |
|
if ((myName[0] == localName[0]) |
| 3480 |
|
&& (nameLen == localPtr->nameLength) |
| 3481 |
|
&& (strcmp(myName, localName) == 0)) { |
| 3482 |
|
varPtr = localVarPtr; |
| 3483 |
|
new = 0; |
| 3484 |
|
break; |
| 3485 |
|
} |
| 3486 |
|
} |
| 3487 |
|
localVarPtr++; |
| 3488 |
|
localPtr = localPtr->nextPtr; |
| 3489 |
|
} |
| 3490 |
|
if (varPtr == NULL) { /* look in frame's local var hashtable */ |
| 3491 |
|
tablePtr = varFramePtr->varTablePtr; |
| 3492 |
|
if (tablePtr == NULL) { |
| 3493 |
|
tablePtr = (Tcl_HashTable *) ckalloc(sizeof(Tcl_HashTable)); |
| 3494 |
|
Tcl_InitHashTable(tablePtr, TCL_STRING_KEYS); |
| 3495 |
|
varFramePtr->varTablePtr = tablePtr; |
| 3496 |
|
} |
| 3497 |
|
hPtr = Tcl_CreateHashEntry(tablePtr, myName, &new); |
| 3498 |
|
if (new) { |
| 3499 |
|
varPtr = NewVar(); |
| 3500 |
|
Tcl_SetHashValue(hPtr, varPtr); |
| 3501 |
|
varPtr->hPtr = hPtr; |
| 3502 |
|
varPtr->nsPtr = varFramePtr->nsPtr; |
| 3503 |
|
} else { |
| 3504 |
|
varPtr = (Var *) Tcl_GetHashValue(hPtr); |
| 3505 |
|
} |
| 3506 |
|
} |
| 3507 |
|
} |
| 3508 |
|
|
| 3509 |
|
if (!new) { |
| 3510 |
|
/* |
| 3511 |
|
* The variable already exists. Make sure this variable "varPtr" |
| 3512 |
|
* isn't the same as "otherPtr" (avoid circular links). Also, if |
| 3513 |
|
* it's not an upvar then it's an error. If it is an upvar, then |
| 3514 |
|
* just disconnect it from the thing it currently refers to. |
| 3515 |
|
*/ |
| 3516 |
|
|
| 3517 |
|
if (varPtr == otherPtr) { |
| 3518 |
|
Tcl_SetResult((Tcl_Interp *) iPtr, |
| 3519 |
|
"can't upvar from variable to itself", TCL_STATIC); |
| 3520 |
|
return TCL_ERROR; |
| 3521 |
|
} |
| 3522 |
|
if (TclIsVarLink(varPtr)) { |
| 3523 |
|
Var *linkPtr = varPtr->value.linkPtr; |
| 3524 |
|
if (linkPtr == otherPtr) { |
| 3525 |
|
return TCL_OK; |
| 3526 |
|
} |
| 3527 |
|
linkPtr->refCount--; |
| 3528 |
|
if (TclIsVarUndefined(linkPtr)) { |
| 3529 |
|
CleanupVar(linkPtr, (Var *) NULL); |
| 3530 |
|
} |
| 3531 |
|
} else if (!TclIsVarUndefined(varPtr)) { |
| 3532 |
|
Tcl_AppendResult((Tcl_Interp *) iPtr, "variable \"", myName, |
| 3533 |
|
"\" already exists", (char *) NULL); |
| 3534 |
|
return TCL_ERROR; |
| 3535 |
|
} else if (varPtr->tracePtr != NULL) { |
| 3536 |
|
Tcl_AppendResult((Tcl_Interp *) iPtr, "variable \"", myName, |
| 3537 |
|
"\" has traces: can't use for upvar", (char *) NULL); |
| 3538 |
|
return TCL_ERROR; |
| 3539 |
|
} |
| 3540 |
|
} |
| 3541 |
|
TclSetVarLink(varPtr); |
| 3542 |
|
TclClearVarUndefined(varPtr); |
| 3543 |
|
varPtr->value.linkPtr = otherPtr; |
| 3544 |
|
otherPtr->refCount++; |
| 3545 |
|
return TCL_OK; |
| 3546 |
|
} |
| 3547 |
|
|
| 3548 |
|
/* |
| 3549 |
|
*---------------------------------------------------------------------- |
| 3550 |
|
* |
| 3551 |
|
* Tcl_UpVar -- |
| 3552 |
|
* |
| 3553 |
|
* This procedure links one variable to another, just like |
| 3554 |
|
* the "upvar" command. |
| 3555 |
|
* |
| 3556 |
|
* Results: |
| 3557 |
|
* A standard Tcl completion code. If an error occurs then |
| 3558 |
|
* an error message is left in the interp's result. |
| 3559 |
|
* |
| 3560 |
|
* Side effects: |
| 3561 |
|
* The variable in frameName whose name is given by varName becomes |
| 3562 |
|
* accessible under the name localName, so that references to |
| 3563 |
|
* localName are redirected to the other variable like a symbolic |
| 3564 |
|
* link. |
| 3565 |
|
* |
| 3566 |
|
*---------------------------------------------------------------------- |
| 3567 |
|
*/ |
| 3568 |
|
|
| 3569 |
|
int |
| 3570 |
|
Tcl_UpVar(interp, frameName, varName, localName, flags) |
| 3571 |
|
Tcl_Interp *interp; /* Command interpreter in which varName is |
| 3572 |
|
* to be looked up. */ |
| 3573 |
|
char *frameName; /* Name of the frame containing the source |
| 3574 |
|
* variable, such as "1" or "#0". */ |
| 3575 |
|
char *varName; /* Name of a variable in interp to link to. |
| 3576 |
|
* May be either a scalar name or an |
| 3577 |
|
* element in an array. */ |
| 3578 |
|
char *localName; /* Name of link variable. */ |
| 3579 |
|
int flags; /* 0, TCL_GLOBAL_ONLY or TCL_NAMESPACE_ONLY: |
| 3580 |
|
* indicates scope of localName. */ |
| 3581 |
|
{ |
| 3582 |
|
int result; |
| 3583 |
|
CallFrame *framePtr; |
| 3584 |
|
register char *p; |
| 3585 |
|
|
| 3586 |
|
result = TclGetFrame(interp, frameName, &framePtr); |
| 3587 |
|
if (result == -1) { |
| 3588 |
|
return TCL_ERROR; |
| 3589 |
|
} |
| 3590 |
|
|
| 3591 |
|
/* |
| 3592 |
|
* Figure out whether varName is an array reference, then call |
| 3593 |
|
* MakeUpvar to do all the real work. |
| 3594 |
|
*/ |
| 3595 |
|
|
| 3596 |
|
for (p = varName; *p != '\0'; p++) { |
| 3597 |
|
if (*p == '(') { |
| 3598 |
|
char *openParen = p; |
| 3599 |
|
do { |
| 3600 |
|
p++; |
| 3601 |
|
} while (*p != '\0'); |
| 3602 |
|
p--; |
| 3603 |
|
if (*p != ')') { |
| 3604 |
|
goto scalar; |
| 3605 |
|
} |
| 3606 |
|
*openParen = '\0'; |
| 3607 |
|
*p = '\0'; |
| 3608 |
|
result = MakeUpvar((Interp *) interp, framePtr, varName, |
| 3609 |
|
openParen+1, 0, localName, flags); |
| 3610 |
|
*openParen = '('; |
| 3611 |
|
*p = ')'; |
| 3612 |
|
return result; |
| 3613 |
|
} |
| 3614 |
|
} |
| 3615 |
|
|
| 3616 |
|
scalar: |
| 3617 |
|
return MakeUpvar((Interp *) interp, framePtr, varName, (char *) NULL, |
| 3618 |
|
0, localName, flags); |
| 3619 |
|
} |
| 3620 |
|
|
| 3621 |
|
/* |
| 3622 |
|
*---------------------------------------------------------------------- |
| 3623 |
|
* |
| 3624 |
|
* Tcl_UpVar2 -- |
| 3625 |
|
* |
| 3626 |
|
* This procedure links one variable to another, just like |
| 3627 |
|
* the "upvar" command. |
| 3628 |
|
* |
| 3629 |
|
* Results: |
| 3630 |
|
* A standard Tcl completion code. If an error occurs then |
| 3631 |
|
* an error message is left in the interp's result. |
| 3632 |
|
* |
| 3633 |
|
* Side effects: |
| 3634 |
|
* The variable in frameName whose name is given by part1 and |
| 3635 |
|
* part2 becomes accessible under the name localName, so that |
| 3636 |
|
* references to localName are redirected to the other variable |
| 3637 |
|
* like a symbolic link. |
| 3638 |
|
* |
| 3639 |
|
*---------------------------------------------------------------------- |
| 3640 |
|
*/ |
| 3641 |
|
|
| 3642 |
|
int |
| 3643 |
|
Tcl_UpVar2(interp, frameName, part1, part2, localName, flags) |
| 3644 |
|
Tcl_Interp *interp; /* Interpreter containing variables. Used |
| 3645 |
|
* for error messages too. */ |
| 3646 |
|
char *frameName; /* Name of the frame containing the source |
| 3647 |
|
* variable, such as "1" or "#0". */ |
| 3648 |
|
char *part1, *part2; /* Two parts of source variable name to |
| 3649 |
|
* link to. */ |
| 3650 |
|
char *localName; /* Name of link variable. */ |
| 3651 |
|
int flags; /* 0, TCL_GLOBAL_ONLY or TCL_NAMESPACE_ONLY: |
| 3652 |
|
* indicates scope of localName. */ |
| 3653 |
|
{ |
| 3654 |
|
int result; |
| 3655 |
|
CallFrame *framePtr; |
| 3656 |
|
|
| 3657 |
|
result = TclGetFrame(interp, frameName, &framePtr); |
| 3658 |
|
if (result == -1) { |
| 3659 |
|
return TCL_ERROR; |
| 3660 |
|
} |
| 3661 |
|
return MakeUpvar((Interp *) interp, framePtr, part1, part2, 0, |
| 3662 |
|
localName, flags); |
| 3663 |
|
} |
| 3664 |
|
|
| 3665 |
|
/* |
| 3666 |
|
*---------------------------------------------------------------------- |
| 3667 |
|
* |
| 3668 |
|
* Tcl_GetVariableFullName -- |
| 3669 |
|
* |
| 3670 |
|
* Given a Tcl_Var token returned by Tcl_FindNamespaceVar, this |
| 3671 |
|
* procedure appends to an object the namespace variable's full |
| 3672 |
|
* name, qualified by a sequence of parent namespace names. |
| 3673 |
|
* |
| 3674 |
|
* Results: |
| 3675 |
|
* None. |
| 3676 |
|
* |
| 3677 |
|
* Side effects: |
| 3678 |
|
* The variable's fully-qualified name is appended to the string |
| 3679 |
|
* representation of objPtr. |
| 3680 |
|
* |
| 3681 |
|
*---------------------------------------------------------------------- |
| 3682 |
|
*/ |
| 3683 |
|
|
| 3684 |
|
void |
| 3685 |
|
Tcl_GetVariableFullName(interp, variable, objPtr) |
| 3686 |
|
Tcl_Interp *interp; /* Interpreter containing the variable. */ |
| 3687 |
|
Tcl_Var variable; /* Token for the variable returned by a |
| 3688 |
|
* previous call to Tcl_FindNamespaceVar. */ |
| 3689 |
|
Tcl_Obj *objPtr; /* Points to the object onto which the |
| 3690 |
|
* variable's full name is appended. */ |
| 3691 |
|
{ |
| 3692 |
|
Interp *iPtr = (Interp *) interp; |
| 3693 |
|
register Var *varPtr = (Var *) variable; |
| 3694 |
|
char *name; |
| 3695 |
|
|
| 3696 |
|
/* |
| 3697 |
|
* Add the full name of the containing namespace (if any), followed by |
| 3698 |
|
* the "::" separator, then the variable name. |
| 3699 |
|
*/ |
| 3700 |
|
|
| 3701 |
|
if (varPtr != NULL) { |
| 3702 |
|
if (!TclIsVarArrayElement(varPtr)) { |
| 3703 |
|
if (varPtr->nsPtr != NULL) { |
| 3704 |
|
Tcl_AppendToObj(objPtr, varPtr->nsPtr->fullName, -1); |
| 3705 |
|
if (varPtr->nsPtr != iPtr->globalNsPtr) { |
| 3706 |
|
Tcl_AppendToObj(objPtr, "::", 2); |
| 3707 |
|
} |
| 3708 |
|
} |
| 3709 |
|
if (varPtr->name != NULL) { |
| 3710 |
|
Tcl_AppendToObj(objPtr, varPtr->name, -1); |
| 3711 |
|
} else if (varPtr->hPtr != NULL) { |
| 3712 |
|
name = Tcl_GetHashKey(varPtr->hPtr->tablePtr, varPtr->hPtr); |
| 3713 |
|
Tcl_AppendToObj(objPtr, name, -1); |
| 3714 |
|
} |
| 3715 |
|
} |
| 3716 |
|
} |
| 3717 |
|
} |
| 3718 |
|
|
| 3719 |
|
/* |
| 3720 |
|
*---------------------------------------------------------------------- |
| 3721 |
|
* |
| 3722 |
|
* Tcl_GlobalObjCmd -- |
| 3723 |
|
* |
| 3724 |
|
* This object-based procedure is invoked to process the "global" Tcl |
| 3725 |
|
* command. See the user documentation for details on what it does. |
| 3726 |
|
* |
| 3727 |
|
* Results: |
| 3728 |
|
* A standard Tcl object result value. |
| 3729 |
|
* |
| 3730 |
|
* Side effects: |
| 3731 |
|
* See the user documentation. |
| 3732 |
|
* |
| 3733 |
|
*---------------------------------------------------------------------- |
| 3734 |
|
*/ |
| 3735 |
|
|
| 3736 |
|
int |
| 3737 |
|
Tcl_GlobalObjCmd(dummy, interp, objc, objv) |
| 3738 |
|
ClientData dummy; /* Not used. */ |
| 3739 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 3740 |
|
int objc; /* Number of arguments. */ |
| 3741 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 3742 |
|
{ |
| 3743 |
|
Interp *iPtr = (Interp *) interp; |
| 3744 |
|
register Tcl_Obj *objPtr; |
| 3745 |
|
char *varName; |
| 3746 |
|
register char *tail; |
| 3747 |
|
int result, i; |
| 3748 |
|
|
| 3749 |
|
if (objc < 2) { |
| 3750 |
|
Tcl_WrongNumArgs(interp, 1, objv, "varName ?varName ...?"); |
| 3751 |
|
return TCL_ERROR; |
| 3752 |
|
} |
| 3753 |
|
|
| 3754 |
|
/* |
| 3755 |
|
* If we are not executing inside a Tcl procedure, just return. |
| 3756 |
|
*/ |
| 3757 |
|
|
| 3758 |
|
if ((iPtr->varFramePtr == NULL) |
| 3759 |
|
|| !iPtr->varFramePtr->isProcCallFrame) { |
| 3760 |
|
return TCL_OK; |
| 3761 |
|
} |
| 3762 |
|
|
| 3763 |
|
for (i = 1; i < objc; i++) { |
| 3764 |
|
/* |
| 3765 |
|
* Make a local variable linked to its counterpart in the global :: |
| 3766 |
|
* namespace. |
| 3767 |
|
*/ |
| 3768 |
|
|
| 3769 |
|
objPtr = objv[i]; |
| 3770 |
|
varName = TclGetString(objPtr); |
| 3771 |
|
|
| 3772 |
|
/* |
| 3773 |
|
* The variable name might have a scope qualifier, but the name for |
| 3774 |
|
* the local "link" variable must be the simple name at the tail. |
| 3775 |
|
*/ |
| 3776 |
|
|
| 3777 |
|
for (tail = varName; *tail != '\0'; tail++) { |
| 3778 |
|
/* empty body */ |
| 3779 |
|
} |
| 3780 |
|
while ((tail > varName) && ((*tail != ':') || (*(tail-1) != ':'))) { |
| 3781 |
|
tail--; |
| 3782 |
|
} |
| 3783 |
|
if (*tail == ':') { |
| 3784 |
|
tail++; |
| 3785 |
|
} |
| 3786 |
|
|
| 3787 |
|
/* |
| 3788 |
|
* Link to the variable "varName" in the global :: namespace. |
| 3789 |
|
*/ |
| 3790 |
|
|
| 3791 |
|
result = MakeUpvar(iPtr, (CallFrame *) NULL, |
| 3792 |
|
varName, (char *) NULL, /*otherFlags*/ TCL_GLOBAL_ONLY, |
| 3793 |
|
/*myName*/ tail, /*myFlags*/ 0); |
| 3794 |
|
if (result != TCL_OK) { |
| 3795 |
|
return result; |
| 3796 |
|
} |
| 3797 |
|
} |
| 3798 |
|
return TCL_OK; |
| 3799 |
|
} |
| 3800 |
|
|
| 3801 |
|
/* |
| 3802 |
|
*---------------------------------------------------------------------- |
| 3803 |
|
* |
| 3804 |
|
* Tcl_VariableObjCmd -- |
| 3805 |
|
* |
| 3806 |
|
* Invoked to implement the "variable" command that creates one or more |
| 3807 |
|
* global variables. Handles the following syntax: |
| 3808 |
|
* |
| 3809 |
|
* variable ?name value...? name ?value? |
| 3810 |
|
* |
| 3811 |
|
* One or more variables can be created. The variables are initialized |
| 3812 |
|
* with the specified values. The value for the last variable is |
| 3813 |
|
* optional. |
| 3814 |
|
* |
| 3815 |
|
* If the variable does not exist, it is created and given the optional |
| 3816 |
|
* value. If it already exists, it is simply set to the optional |
| 3817 |
|
* value. Normally, "name" is an unqualified name, so it is created in |
| 3818 |
|
* the current namespace. If it includes namespace qualifiers, it can |
| 3819 |
|
* be created in another namespace. |
| 3820 |
|
* |
| 3821 |
|
* If the variable command is executed inside a Tcl procedure, it |
| 3822 |
|
* creates a local variable linked to the newly-created namespace |
| 3823 |
|
* variable. |
| 3824 |
|
* |
| 3825 |
|
* Results: |
| 3826 |
|
* Returns TCL_OK if the variable is found or created. Returns |
| 3827 |
|
* TCL_ERROR if anything goes wrong. |
| 3828 |
|
* |
| 3829 |
|
* Side effects: |
| 3830 |
|
* If anything goes wrong, this procedure returns an error message |
| 3831 |
|
* as the result in the interpreter's result object. |
| 3832 |
|
* |
| 3833 |
|
*---------------------------------------------------------------------- |
| 3834 |
|
*/ |
| 3835 |
|
|
| 3836 |
|
int |
| 3837 |
|
Tcl_VariableObjCmd(dummy, interp, objc, objv) |
| 3838 |
|
ClientData dummy; /* Not used. */ |
| 3839 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 3840 |
|
int objc; /* Number of arguments. */ |
| 3841 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 3842 |
|
{ |
| 3843 |
|
Interp *iPtr = (Interp *) interp; |
| 3844 |
|
char *varName, *tail, *cp; |
| 3845 |
|
Var *varPtr, *arrayPtr; |
| 3846 |
|
Tcl_Obj *varValuePtr; |
| 3847 |
|
int i, result; |
| 3848 |
|
|
| 3849 |
|
for (i = 1; i < objc; i = i+2) { |
| 3850 |
|
/* |
| 3851 |
|
* Look up each variable in the current namespace context, creating |
| 3852 |
|
* it if necessary. |
| 3853 |
|
*/ |
| 3854 |
|
|
| 3855 |
|
varName = TclGetString(objv[i]); |
| 3856 |
|
varPtr = TclLookupVar(interp, varName, (char *) NULL, |
| 3857 |
|
(TCL_NAMESPACE_ONLY | TCL_LEAVE_ERR_MSG), "define", |
| 3858 |
|
/*createPart1*/ 1, /*createPart2*/ 0, &arrayPtr); |
| 3859 |
|
|
| 3860 |
|
if (arrayPtr != NULL) { |
| 3861 |
|
/* |
| 3862 |
|
* Variable cannot be an element in an array. If arrayPtr is |
| 3863 |
|
* non-null, it is, so throw up an error and return. |
| 3864 |
|
*/ |
| 3865 |
|
VarErrMsg(interp, varName, NULL, "define", isArrayElement); |
| 3866 |
|
return TCL_ERROR; |
| 3867 |
|
} |
| 3868 |
|
|
| 3869 |
|
if (varPtr == NULL) { |
| 3870 |
|
return TCL_ERROR; |
| 3871 |
|
} |
| 3872 |
|
|
| 3873 |
|
/* |
| 3874 |
|
* Mark the variable as a namespace variable and increment its |
| 3875 |
|
* reference count so that it will persist until its namespace is |
| 3876 |
|
* destroyed or until the variable is unset. |
| 3877 |
|
*/ |
| 3878 |
|
|
| 3879 |
|
if (!(varPtr->flags & VAR_NAMESPACE_VAR)) { |
| 3880 |
|
varPtr->flags |= VAR_NAMESPACE_VAR; |
| 3881 |
|
varPtr->refCount++; |
| 3882 |
|
} |
| 3883 |
|
|
| 3884 |
|
/* |
| 3885 |
|
* If a value was specified, set the variable to that value. |
| 3886 |
|
* Otherwise, if the variable is new, leave it undefined. |
| 3887 |
|
* (If the variable already exists and no value was specified, |
| 3888 |
|
* leave its value unchanged; just create the local link if |
| 3889 |
|
* we're in a Tcl procedure). |
| 3890 |
|
*/ |
| 3891 |
|
|
| 3892 |
|
if (i+1 < objc) { /* a value was specified */ |
| 3893 |
|
varValuePtr = Tcl_ObjSetVar2(interp, objv[i], NULL, objv[i+1], |
| 3894 |
|
(TCL_NAMESPACE_ONLY | TCL_LEAVE_ERR_MSG)); |
| 3895 |
|
if (varValuePtr == NULL) { |
| 3896 |
|
return TCL_ERROR; |
| 3897 |
|
} |
| 3898 |
|
} |
| 3899 |
|
|
| 3900 |
|
/* |
| 3901 |
|
* If we are executing inside a Tcl procedure, create a local |
| 3902 |
|
* variable linked to the new namespace variable "varName". |
| 3903 |
|
*/ |
| 3904 |
|
|
| 3905 |
|
if ((iPtr->varFramePtr != NULL) |
| 3906 |
|
&& iPtr->varFramePtr->isProcCallFrame) { |
| 3907 |
|
/* |
| 3908 |
|
* varName might have a scope qualifier, but the name for the |
| 3909 |
|
* local "link" variable must be the simple name at the tail. |
| 3910 |
|
* |
| 3911 |
|
* Locate tail in one pass: drop any prefix after two *or more* |
| 3912 |
|
* consecutive ":" characters). |
| 3913 |
|
*/ |
| 3914 |
|
|
| 3915 |
|
for (tail = cp = varName; *cp != '\0'; ) { |
| 3916 |
|
if (*cp++ == ':') { |
| 3917 |
|
while (*cp == ':') { |
| 3918 |
|
tail = ++cp; |
| 3919 |
|
} |
| 3920 |
|
} |
| 3921 |
|
} |
| 3922 |
|
|
| 3923 |
|
/* |
| 3924 |
|
* Create a local link "tail" to the variable "varName" in the |
| 3925 |
|
* current namespace. |
| 3926 |
|
*/ |
| 3927 |
|
|
| 3928 |
|
result = MakeUpvar(iPtr, (CallFrame *) NULL, |
| 3929 |
|
/*otherP1*/ varName, /*otherP2*/ (char *) NULL, |
| 3930 |
|
/*otherFlags*/ TCL_NAMESPACE_ONLY, |
| 3931 |
|
/*myName*/ tail, /*myFlags*/ 0); |
| 3932 |
|
if (result != TCL_OK) { |
| 3933 |
|
return result; |
| 3934 |
|
} |
| 3935 |
|
} |
| 3936 |
|
} |
| 3937 |
|
return TCL_OK; |
| 3938 |
|
} |
| 3939 |
|
|
| 3940 |
|
/* |
| 3941 |
|
*---------------------------------------------------------------------- |
| 3942 |
|
* |
| 3943 |
|
* Tcl_UpvarObjCmd -- |
| 3944 |
|
* |
| 3945 |
|
* This object-based procedure is invoked to process the "upvar" |
| 3946 |
|
* Tcl command. See the user documentation for details on what it does. |
| 3947 |
|
* |
| 3948 |
|
* Results: |
| 3949 |
|
* A standard Tcl object result value. |
| 3950 |
|
* |
| 3951 |
|
* Side effects: |
| 3952 |
|
* See the user documentation. |
| 3953 |
|
* |
| 3954 |
|
*---------------------------------------------------------------------- |
| 3955 |
|
*/ |
| 3956 |
|
|
| 3957 |
|
/* ARGSUSED */ |
| 3958 |
|
int |
| 3959 |
|
Tcl_UpvarObjCmd(dummy, interp, objc, objv) |
| 3960 |
|
ClientData dummy; /* Not used. */ |
| 3961 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 3962 |
|
int objc; /* Number of arguments. */ |
| 3963 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 3964 |
|
{ |
| 3965 |
|
register Interp *iPtr = (Interp *) interp; |
| 3966 |
|
CallFrame *framePtr; |
| 3967 |
|
char *frameSpec, *otherVarName, *myVarName; |
| 3968 |
|
register char *p; |
| 3969 |
|
int result; |
| 3970 |
|
|
| 3971 |
|
if (objc < 3) { |
| 3972 |
|
upvarSyntax: |
| 3973 |
|
Tcl_WrongNumArgs(interp, 1, objv, |
| 3974 |
|
"?level? otherVar localVar ?otherVar localVar ...?"); |
| 3975 |
|
return TCL_ERROR; |
| 3976 |
|
} |
| 3977 |
|
|
| 3978 |
|
/* |
| 3979 |
|
* Find the call frame containing each of the "other variables" to be |
| 3980 |
|
* linked to. |
| 3981 |
|
*/ |
| 3982 |
|
|
| 3983 |
|
frameSpec = TclGetString(objv[1]); |
| 3984 |
|
result = TclGetFrame(interp, frameSpec, &framePtr); |
| 3985 |
|
if (result == -1) { |
| 3986 |
|
return TCL_ERROR; |
| 3987 |
|
} |
| 3988 |
|
objc -= result+1; |
| 3989 |
|
if ((objc & 1) != 0) { |
| 3990 |
|
goto upvarSyntax; |
| 3991 |
|
} |
| 3992 |
|
objv += result+1; |
| 3993 |
|
|
| 3994 |
|
/* |
| 3995 |
|
* Iterate over each (other variable, local variable) pair. |
| 3996 |
|
* Divide the other variable name into two parts, then call |
| 3997 |
|
* MakeUpvar to do all the work of linking it to the local variable. |
| 3998 |
|
*/ |
| 3999 |
|
|
| 4000 |
|
for ( ; objc > 0; objc -= 2, objv += 2) { |
| 4001 |
|
myVarName = TclGetString(objv[1]); |
| 4002 |
|
otherVarName = TclGetString(objv[0]); |
| 4003 |
|
for (p = otherVarName; *p != 0; p++) { |
| 4004 |
|
if (*p == '(') { |
| 4005 |
|
char *openParen = p; |
| 4006 |
|
|
| 4007 |
|
do { |
| 4008 |
|
p++; |
| 4009 |
|
} while (*p != '\0'); |
| 4010 |
|
p--; |
| 4011 |
|
if (*p != ')') { |
| 4012 |
|
goto scalar; |
| 4013 |
|
} |
| 4014 |
|
*openParen = '\0'; |
| 4015 |
|
*p = '\0'; |
| 4016 |
|
result = MakeUpvar(iPtr, framePtr, |
| 4017 |
|
otherVarName, openParen+1, /*otherFlags*/ 0, |
| 4018 |
|
myVarName, /*flags*/ 0); |
| 4019 |
|
*openParen = '('; |
| 4020 |
|
*p = ')'; |
| 4021 |
|
goto checkResult; |
| 4022 |
|
} |
| 4023 |
|
} |
| 4024 |
|
scalar: |
| 4025 |
|
result = MakeUpvar(iPtr, framePtr, otherVarName, (char *) NULL, 0, |
| 4026 |
|
myVarName, /*flags*/ 0); |
| 4027 |
|
|
| 4028 |
|
checkResult: |
| 4029 |
|
if (result != TCL_OK) { |
| 4030 |
|
return TCL_ERROR; |
| 4031 |
|
} |
| 4032 |
|
} |
| 4033 |
|
return TCL_OK; |
| 4034 |
|
} |
| 4035 |
|
|
| 4036 |
|
/* |
| 4037 |
|
*---------------------------------------------------------------------- |
| 4038 |
|
* |
| 4039 |
|
* CallTraces -- |
| 4040 |
|
* |
| 4041 |
|
* This procedure is invoked to find and invoke relevant |
| 4042 |
|
* trace procedures associated with a particular operation on |
| 4043 |
|
* a variable. This procedure invokes traces both on the |
| 4044 |
|
* variable and on its containing array (where relevant). |
| 4045 |
|
* |
| 4046 |
|
* Results: |
| 4047 |
|
* The return value is NULL if no trace procedures were invoked, or |
| 4048 |
|
* if all the invoked trace procedures returned successfully. |
| 4049 |
|
* The return value is non-NULL if a trace procedure returned an |
| 4050 |
|
* error (in this case no more trace procedures were invoked after |
| 4051 |
|
* the error was returned). In this case the return value is a |
| 4052 |
|
* pointer to a static string describing the error. |
| 4053 |
|
* |
| 4054 |
|
* Side effects: |
| 4055 |
|
* Almost anything can happen, depending on trace; this procedure |
| 4056 |
|
* itself doesn't have any side effects. |
| 4057 |
|
* |
| 4058 |
|
*---------------------------------------------------------------------- |
| 4059 |
|
*/ |
| 4060 |
|
|
| 4061 |
|
static char * |
| 4062 |
|
CallTraces(iPtr, arrayPtr, varPtr, part1, part2, flags) |
| 4063 |
|
Interp *iPtr; /* Interpreter containing variable. */ |
| 4064 |
|
register Var *arrayPtr; /* Pointer to array variable that contains |
| 4065 |
|
* the variable, or NULL if the variable |
| 4066 |
|
* isn't an element of an array. */ |
| 4067 |
|
Var *varPtr; /* Variable whose traces are to be |
| 4068 |
|
* invoked. */ |
| 4069 |
|
char *part1, *part2; /* Variable's two-part name. */ |
| 4070 |
|
int flags; /* Flags passed to trace procedures: |
| 4071 |
|
* indicates what's happening to variable, |
| 4072 |
|
* plus other stuff like TCL_GLOBAL_ONLY, |
| 4073 |
|
* TCL_NAMESPACE_ONLY, and |
| 4074 |
|
* TCL_INTERP_DESTROYED. */ |
| 4075 |
|
{ |
| 4076 |
|
register VarTrace *tracePtr; |
| 4077 |
|
ActiveVarTrace active; |
| 4078 |
|
char *result, *openParen, *p; |
| 4079 |
|
Tcl_DString nameCopy; |
| 4080 |
|
int copiedName; |
| 4081 |
|
|
| 4082 |
|
/* |
| 4083 |
|
* If there are already similar trace procedures active for the |
| 4084 |
|
* variable, don't call them again. |
| 4085 |
|
*/ |
| 4086 |
|
|
| 4087 |
|
if (varPtr->flags & VAR_TRACE_ACTIVE) { |
| 4088 |
|
return NULL; |
| 4089 |
|
} |
| 4090 |
|
varPtr->flags |= VAR_TRACE_ACTIVE; |
| 4091 |
|
varPtr->refCount++; |
| 4092 |
|
|
| 4093 |
|
/* |
| 4094 |
|
* If the variable name hasn't been parsed into array name and |
| 4095 |
|
* element, do it here. If there really is an array element, |
| 4096 |
|
* make a copy of the original name so that NULLs can be |
| 4097 |
|
* inserted into it to separate the names (can't modify the name |
| 4098 |
|
* string in place, because the string might get used by the |
| 4099 |
|
* callbacks we invoke). |
| 4100 |
|
*/ |
| 4101 |
|
|
| 4102 |
|
copiedName = 0; |
| 4103 |
|
if (part2 == NULL) { |
| 4104 |
|
for (p = part1; *p ; p++) { |
| 4105 |
|
if (*p == '(') { |
| 4106 |
|
openParen = p; |
| 4107 |
|
do { |
| 4108 |
|
p++; |
| 4109 |
|
} while (*p != '\0'); |
| 4110 |
|
p--; |
| 4111 |
|
if (*p == ')') { |
| 4112 |
|
Tcl_DStringInit(&nameCopy); |
| 4113 |
|
Tcl_DStringAppend(&nameCopy, part1, (p-part1)); |
| 4114 |
|
part2 = Tcl_DStringValue(&nameCopy) |
| 4115 |
|
+ (openParen + 1 - part1); |
| 4116 |
|
part2[-1] = 0; |
| 4117 |
|
part1 = Tcl_DStringValue(&nameCopy); |
| 4118 |
|
copiedName = 1; |
| 4119 |
|
} |
| 4120 |
|
break; |
| 4121 |
|
} |
| 4122 |
|
} |
| 4123 |
|
} |
| 4124 |
|
|
| 4125 |
|
/* |
| 4126 |
|
* Invoke traces on the array containing the variable, if relevant. |
| 4127 |
|
*/ |
| 4128 |
|
|
| 4129 |
|
result = NULL; |
| 4130 |
|
active.nextPtr = iPtr->activeTracePtr; |
| 4131 |
|
iPtr->activeTracePtr = &active; |
| 4132 |
|
if (arrayPtr != NULL) { |
| 4133 |
|
arrayPtr->refCount++; |
| 4134 |
|
active.varPtr = arrayPtr; |
| 4135 |
|
for (tracePtr = arrayPtr->tracePtr; tracePtr != NULL; |
| 4136 |
|
tracePtr = active.nextTracePtr) { |
| 4137 |
|
active.nextTracePtr = tracePtr->nextPtr; |
| 4138 |
|
if (!(tracePtr->flags & flags)) { |
| 4139 |
|
continue; |
| 4140 |
|
} |
| 4141 |
|
result = (*tracePtr->traceProc)(tracePtr->clientData, |
| 4142 |
|
(Tcl_Interp *) iPtr, part1, part2, flags); |
| 4143 |
|
if (result != NULL) { |
| 4144 |
|
if (flags & TCL_TRACE_UNSETS) { |
| 4145 |
|
result = NULL; |
| 4146 |
|
} else { |
| 4147 |
|
goto done; |
| 4148 |
|
} |
| 4149 |
|
} |
| 4150 |
|
} |
| 4151 |
|
} |
| 4152 |
|
|
| 4153 |
|
/* |
| 4154 |
|
* Invoke traces on the variable itself. |
| 4155 |
|
*/ |
| 4156 |
|
|
| 4157 |
|
if (flags & TCL_TRACE_UNSETS) { |
| 4158 |
|
flags |= TCL_TRACE_DESTROYED; |
| 4159 |
|
} |
| 4160 |
|
active.varPtr = varPtr; |
| 4161 |
|
for (tracePtr = varPtr->tracePtr; tracePtr != NULL; |
| 4162 |
|
tracePtr = active.nextTracePtr) { |
| 4163 |
|
active.nextTracePtr = tracePtr->nextPtr; |
| 4164 |
|
if (!(tracePtr->flags & flags)) { |
| 4165 |
|
continue; |
| 4166 |
|
} |
| 4167 |
|
result = (*tracePtr->traceProc)(tracePtr->clientData, |
| 4168 |
|
(Tcl_Interp *) iPtr, part1, part2, flags); |
| 4169 |
|
if (result != NULL) { |
| 4170 |
|
if (flags & TCL_TRACE_UNSETS) { |
| 4171 |
|
result = NULL; |
| 4172 |
|
} else { |
| 4173 |
|
goto done; |
| 4174 |
|
} |
| 4175 |
|
} |
| 4176 |
|
} |
| 4177 |
|
|
| 4178 |
|
/* |
| 4179 |
|
* Restore the variable's flags, remove the record of our active |
| 4180 |
|
* traces, and then return. |
| 4181 |
|
*/ |
| 4182 |
|
|
| 4183 |
|
done: |
| 4184 |
|
if (arrayPtr != NULL) { |
| 4185 |
|
arrayPtr->refCount--; |
| 4186 |
|
} |
| 4187 |
|
if (copiedName) { |
| 4188 |
|
Tcl_DStringFree(&nameCopy); |
| 4189 |
|
} |
| 4190 |
|
varPtr->flags &= ~VAR_TRACE_ACTIVE; |
| 4191 |
|
varPtr->refCount--; |
| 4192 |
|
iPtr->activeTracePtr = active.nextPtr; |
| 4193 |
|
return result; |
| 4194 |
|
} |
| 4195 |
|
|
| 4196 |
|
/* |
| 4197 |
|
*---------------------------------------------------------------------- |
| 4198 |
|
* |
| 4199 |
|
* NewVar -- |
| 4200 |
|
* |
| 4201 |
|
* Create a new heap-allocated variable that will eventually be |
| 4202 |
|
* entered into a hashtable. |
| 4203 |
|
* |
| 4204 |
|
* Results: |
| 4205 |
|
* The return value is a pointer to the new variable structure. It is |
| 4206 |
|
* marked as a scalar variable (and not a link or array variable). Its |
| 4207 |
|
* value initially is NULL. The variable is not part of any hash table |
| 4208 |
|
* yet. Since it will be in a hashtable and not in a call frame, its |
| 4209 |
|
* name field is set NULL. It is initially marked as undefined. |
| 4210 |
|
* |
| 4211 |
|
* Side effects: |
| 4212 |
|
* Storage gets allocated. |
| 4213 |
|
* |
| 4214 |
|
*---------------------------------------------------------------------- |
| 4215 |
|
*/ |
| 4216 |
|
|
| 4217 |
|
static Var * |
| 4218 |
|
NewVar() |
| 4219 |
|
{ |
| 4220 |
|
register Var *varPtr; |
| 4221 |
|
|
| 4222 |
|
varPtr = (Var *) ckalloc(sizeof(Var)); |
| 4223 |
|
varPtr->value.objPtr = NULL; |
| 4224 |
|
varPtr->name = NULL; |
| 4225 |
|
varPtr->nsPtr = NULL; |
| 4226 |
|
varPtr->hPtr = NULL; |
| 4227 |
|
varPtr->refCount = 0; |
| 4228 |
|
varPtr->tracePtr = NULL; |
| 4229 |
|
varPtr->searchPtr = NULL; |
| 4230 |
|
varPtr->flags = (VAR_SCALAR | VAR_UNDEFINED | VAR_IN_HASHTABLE); |
| 4231 |
|
return varPtr; |
| 4232 |
|
} |
| 4233 |
|
|
| 4234 |
|
/* |
| 4235 |
|
*---------------------------------------------------------------------- |
| 4236 |
|
* |
| 4237 |
|
* ParseSearchId -- |
| 4238 |
|
* |
| 4239 |
|
* This procedure translates from a string to a pointer to an |
| 4240 |
|
* active array search (if there is one that matches the string). |
| 4241 |
|
* |
| 4242 |
|
* Results: |
| 4243 |
|
* The return value is a pointer to the array search indicated |
| 4244 |
|
* by string, or NULL if there isn't one. If NULL is returned, |
| 4245 |
|
* the interp's result contains an error message. |
| 4246 |
|
* |
| 4247 |
|
* Side effects: |
| 4248 |
|
* None. |
| 4249 |
|
* |
| 4250 |
|
*---------------------------------------------------------------------- |
| 4251 |
|
*/ |
| 4252 |
|
|
| 4253 |
|
static ArraySearch * |
| 4254 |
|
ParseSearchId(interp, varPtr, varName, string) |
| 4255 |
|
Tcl_Interp *interp; /* Interpreter containing variable. */ |
| 4256 |
|
Var *varPtr; /* Array variable search is for. */ |
| 4257 |
|
char *varName; /* Name of array variable that search is |
| 4258 |
|
* supposed to be for. */ |
| 4259 |
|
char *string; /* String containing id of search. Must have |
| 4260 |
|
* form "search-num-var" where "num" is a |
| 4261 |
|
* decimal number and "var" is a variable |
| 4262 |
|
* name. */ |
| 4263 |
|
{ |
| 4264 |
|
char *end; |
| 4265 |
|
int id; |
| 4266 |
|
ArraySearch *searchPtr; |
| 4267 |
|
|
| 4268 |
|
/* |
| 4269 |
|
* Parse the id into the three parts separated by dashes. |
| 4270 |
|
*/ |
| 4271 |
|
|
| 4272 |
|
if ((string[0] != 's') || (string[1] != '-')) { |
| 4273 |
|
syntax: |
| 4274 |
|
Tcl_AppendResult(interp, "illegal search identifier \"", string, |
| 4275 |
|
"\"", (char *) NULL); |
| 4276 |
|
return NULL; |
| 4277 |
|
} |
| 4278 |
|
id = strtoul(string+2, &end, 10); |
| 4279 |
|
if ((end == (string+2)) || (*end != '-')) { |
| 4280 |
|
goto syntax; |
| 4281 |
|
} |
| 4282 |
|
if (strcmp(end+1, varName) != 0) { |
| 4283 |
|
Tcl_AppendResult(interp, "search identifier \"", string, |
| 4284 |
|
"\" isn't for variable \"", varName, "\"", (char *) NULL); |
| 4285 |
|
return NULL; |
| 4286 |
|
} |
| 4287 |
|
|
| 4288 |
|
/* |
| 4289 |
|
* Search through the list of active searches on the interpreter |
| 4290 |
|
* to see if the desired one exists. |
| 4291 |
|
*/ |
| 4292 |
|
|
| 4293 |
|
for (searchPtr = varPtr->searchPtr; searchPtr != NULL; |
| 4294 |
|
searchPtr = searchPtr->nextPtr) { |
| 4295 |
|
if (searchPtr->id == id) { |
| 4296 |
|
return searchPtr; |
| 4297 |
|
} |
| 4298 |
|
} |
| 4299 |
|
Tcl_AppendResult(interp, "couldn't find search \"", string, "\"", |
| 4300 |
|
(char *) NULL); |
| 4301 |
|
return NULL; |
| 4302 |
|
} |
| 4303 |
|
|
| 4304 |
|
/* |
| 4305 |
|
*---------------------------------------------------------------------- |
| 4306 |
|
* |
| 4307 |
|
* DeleteSearches -- |
| 4308 |
|
* |
| 4309 |
|
* This procedure is called to free up all of the searches |
| 4310 |
|
* associated with an array variable. |
| 4311 |
|
* |
| 4312 |
|
* Results: |
| 4313 |
|
* None. |
| 4314 |
|
* |
| 4315 |
|
* Side effects: |
| 4316 |
|
* Memory is released to the storage allocator. |
| 4317 |
|
* |
| 4318 |
|
*---------------------------------------------------------------------- |
| 4319 |
|
*/ |
| 4320 |
|
|
| 4321 |
|
static void |
| 4322 |
|
DeleteSearches(arrayVarPtr) |
| 4323 |
|
register Var *arrayVarPtr; /* Variable whose searches are |
| 4324 |
|
* to be deleted. */ |
| 4325 |
|
{ |
| 4326 |
|
ArraySearch *searchPtr; |
| 4327 |
|
|
| 4328 |
|
while (arrayVarPtr->searchPtr != NULL) { |
| 4329 |
|
searchPtr = arrayVarPtr->searchPtr; |
| 4330 |
|
arrayVarPtr->searchPtr = searchPtr->nextPtr; |
| 4331 |
|
ckfree((char *) searchPtr); |
| 4332 |
|
} |
| 4333 |
|
} |
| 4334 |
|
|
| 4335 |
|
/* |
| 4336 |
|
*---------------------------------------------------------------------- |
| 4337 |
|
* |
| 4338 |
|
* TclDeleteVars -- |
| 4339 |
|
* |
| 4340 |
|
* This procedure is called to recycle all the storage space |
| 4341 |
|
* associated with a table of variables. For this procedure |
| 4342 |
|
* to work correctly, it must not be possible for any of the |
| 4343 |
|
* variables in the table to be accessed from Tcl commands |
| 4344 |
|
* (e.g. from trace procedures). |
| 4345 |
|
* |
| 4346 |
|
* Results: |
| 4347 |
|
* None. |
| 4348 |
|
* |
| 4349 |
|
* Side effects: |
| 4350 |
|
* Variables are deleted and trace procedures are invoked, if |
| 4351 |
|
* any are declared. |
| 4352 |
|
* |
| 4353 |
|
*---------------------------------------------------------------------- |
| 4354 |
|
*/ |
| 4355 |
|
|
| 4356 |
|
void |
| 4357 |
|
TclDeleteVars(iPtr, tablePtr) |
| 4358 |
|
Interp *iPtr; /* Interpreter to which variables belong. */ |
| 4359 |
|
Tcl_HashTable *tablePtr; /* Hash table containing variables to |
| 4360 |
|
* delete. */ |
| 4361 |
|
{ |
| 4362 |
|
Tcl_Interp *interp = (Tcl_Interp *) iPtr; |
| 4363 |
|
Tcl_HashSearch search; |
| 4364 |
|
Tcl_HashEntry *hPtr; |
| 4365 |
|
register Var *varPtr; |
| 4366 |
|
Var *linkPtr; |
| 4367 |
|
int flags; |
| 4368 |
|
ActiveVarTrace *activePtr; |
| 4369 |
|
Tcl_Obj *objPtr; |
| 4370 |
|
Namespace *currNsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
| 4371 |
|
|
| 4372 |
|
/* |
| 4373 |
|
* Determine what flags to pass to the trace callback procedures. |
| 4374 |
|
*/ |
| 4375 |
|
|
| 4376 |
|
flags = TCL_TRACE_UNSETS; |
| 4377 |
|
if (tablePtr == &iPtr->globalNsPtr->varTable) { |
| 4378 |
|
flags |= (TCL_INTERP_DESTROYED | TCL_GLOBAL_ONLY); |
| 4379 |
|
} else if (tablePtr == &currNsPtr->varTable) { |
| 4380 |
|
flags |= TCL_NAMESPACE_ONLY; |
| 4381 |
|
} |
| 4382 |
|
|
| 4383 |
|
for (hPtr = Tcl_FirstHashEntry(tablePtr, &search); hPtr != NULL; |
| 4384 |
|
hPtr = Tcl_NextHashEntry(&search)) { |
| 4385 |
|
varPtr = (Var *) Tcl_GetHashValue(hPtr); |
| 4386 |
|
|
| 4387 |
|
/* |
| 4388 |
|
* For global/upvar variables referenced in procedures, decrement |
| 4389 |
|
* the reference count on the variable referred to, and free |
| 4390 |
|
* the referenced variable if it's no longer needed. Don't delete |
| 4391 |
|
* the hash entry for the other variable if it's in the same table |
| 4392 |
|
* as us: this will happen automatically later on. |
| 4393 |
|
*/ |
| 4394 |
|
|
| 4395 |
|
if (TclIsVarLink(varPtr)) { |
| 4396 |
|
linkPtr = varPtr->value.linkPtr; |
| 4397 |
|
linkPtr->refCount--; |
| 4398 |
|
if ((linkPtr->refCount == 0) && TclIsVarUndefined(linkPtr) |
| 4399 |
|
&& (linkPtr->tracePtr == NULL) |
| 4400 |
|
&& (linkPtr->flags & VAR_IN_HASHTABLE)) { |
| 4401 |
|
if (linkPtr->hPtr == NULL) { |
| 4402 |
|
ckfree((char *) linkPtr); |
| 4403 |
|
} else if (linkPtr->hPtr->tablePtr != tablePtr) { |
| 4404 |
|
Tcl_DeleteHashEntry(linkPtr->hPtr); |
| 4405 |
|
ckfree((char *) linkPtr); |
| 4406 |
|
} |
| 4407 |
|
} |
| 4408 |
|
} |
| 4409 |
|
|
| 4410 |
|
/* |
| 4411 |
|
* Invoke traces on the variable that is being deleted, then |
| 4412 |
|
* free up the variable's space (no need to free the hash entry |
| 4413 |
|
* here, unless we're dealing with a global variable: the |
| 4414 |
|
* hash entries will be deleted automatically when the whole |
| 4415 |
|
* table is deleted). Note that we give CallTraces the variable's |
| 4416 |
|
* fully-qualified name so that any called trace procedures can |
| 4417 |
|
* refer to these variables being deleted. |
| 4418 |
|
*/ |
| 4419 |
|
|
| 4420 |
|
if (varPtr->tracePtr != NULL) { |
| 4421 |
|
objPtr = Tcl_NewObj(); |
| 4422 |
|
Tcl_IncrRefCount(objPtr); /* until done with traces */ |
| 4423 |
|
Tcl_GetVariableFullName(interp, (Tcl_Var) varPtr, objPtr); |
| 4424 |
|
(void) CallTraces(iPtr, (Var *) NULL, varPtr, |
| 4425 |
|
Tcl_GetString(objPtr), (char *) NULL, flags); |
| 4426 |
|
Tcl_DecrRefCount(objPtr); /* free no longer needed obj */ |
| 4427 |
|
|
| 4428 |
|
while (varPtr->tracePtr != NULL) { |
| 4429 |
|
VarTrace *tracePtr = varPtr->tracePtr; |
| 4430 |
|
varPtr->tracePtr = tracePtr->nextPtr; |
| 4431 |
|
ckfree((char *) tracePtr); |
| 4432 |
|
} |
| 4433 |
|
for (activePtr = iPtr->activeTracePtr; activePtr != NULL; |
| 4434 |
|
activePtr = activePtr->nextPtr) { |
| 4435 |
|
if (activePtr->varPtr == varPtr) { |
| 4436 |
|
activePtr->nextTracePtr = NULL; |
| 4437 |
|
} |
| 4438 |
|
} |
| 4439 |
|
} |
| 4440 |
|
|
| 4441 |
|
if (TclIsVarArray(varPtr)) { |
| 4442 |
|
DeleteArray(iPtr, Tcl_GetHashKey(tablePtr, hPtr), varPtr, |
| 4443 |
|
flags); |
| 4444 |
|
varPtr->value.tablePtr = NULL; |
| 4445 |
|
} |
| 4446 |
|
if (TclIsVarScalar(varPtr) && (varPtr->value.objPtr != NULL)) { |
| 4447 |
|
objPtr = varPtr->value.objPtr; |
| 4448 |
|
TclDecrRefCount(objPtr); |
| 4449 |
|
varPtr->value.objPtr = NULL; |
| 4450 |
|
} |
| 4451 |
|
varPtr->hPtr = NULL; |
| 4452 |
|
varPtr->tracePtr = NULL; |
| 4453 |
|
TclSetVarUndefined(varPtr); |
| 4454 |
|
TclSetVarScalar(varPtr); |
| 4455 |
|
|
| 4456 |
|
/* |
| 4457 |
|
* If the variable was a namespace variable, decrement its |
| 4458 |
|
* reference count. We are in the process of destroying its |
| 4459 |
|
* namespace so that namespace will no longer "refer" to the |
| 4460 |
|
* variable. |
| 4461 |
|
*/ |
| 4462 |
|
|
| 4463 |
|
if (varPtr->flags & VAR_NAMESPACE_VAR) { |
| 4464 |
|
varPtr->flags &= ~VAR_NAMESPACE_VAR; |
| 4465 |
|
varPtr->refCount--; |
| 4466 |
|
} |
| 4467 |
|
|
| 4468 |
|
/* |
| 4469 |
|
* Recycle the variable's memory space if there aren't any upvar's |
| 4470 |
|
* pointing to it. If there are upvars to this variable, then the |
| 4471 |
|
* variable will get freed when the last upvar goes away. |
| 4472 |
|
*/ |
| 4473 |
|
|
| 4474 |
|
if (varPtr->refCount == 0) { |
| 4475 |
|
ckfree((char *) varPtr); /* this Var must be VAR_IN_HASHTABLE */ |
| 4476 |
|
} |
| 4477 |
|
} |
| 4478 |
|
Tcl_DeleteHashTable(tablePtr); |
| 4479 |
|
} |
| 4480 |
|
|
| 4481 |
|
/* |
| 4482 |
|
*---------------------------------------------------------------------- |
| 4483 |
|
* |
| 4484 |
|
* TclDeleteCompiledLocalVars -- |
| 4485 |
|
* |
| 4486 |
|
* This procedure is called to recycle storage space associated with |
| 4487 |
|
* the compiler-allocated array of local variables in a procedure call |
| 4488 |
|
* frame. This procedure resembles TclDeleteVars above except that each |
| 4489 |
|
* variable is stored in a call frame and not a hash table. For this |
| 4490 |
|
* procedure to work correctly, it must not be possible for any of the |
| 4491 |
|
* variable in the table to be accessed from Tcl commands (e.g. from |
| 4492 |
|
* trace procedures). |
| 4493 |
|
* |
| 4494 |
|
* Results: |
| 4495 |
|
* None. |
| 4496 |
|
* |
| 4497 |
|
* Side effects: |
| 4498 |
|
* Variables are deleted and trace procedures are invoked, if |
| 4499 |
|
* any are declared. |
| 4500 |
|
* |
| 4501 |
|
*---------------------------------------------------------------------- |
| 4502 |
|
*/ |
| 4503 |
|
|
| 4504 |
|
void |
| 4505 |
|
TclDeleteCompiledLocalVars(iPtr, framePtr) |
| 4506 |
|
Interp *iPtr; /* Interpreter to which variables belong. */ |
| 4507 |
|
CallFrame *framePtr; /* Procedure call frame containing |
| 4508 |
|
* compiler-assigned local variables to |
| 4509 |
|
* delete. */ |
| 4510 |
|
{ |
| 4511 |
|
register Var *varPtr; |
| 4512 |
|
int flags; /* Flags passed to trace procedures. */ |
| 4513 |
|
Var *linkPtr; |
| 4514 |
|
ActiveVarTrace *activePtr; |
| 4515 |
|
int numLocals, i; |
| 4516 |
|
|
| 4517 |
|
flags = TCL_TRACE_UNSETS; |
| 4518 |
|
numLocals = framePtr->numCompiledLocals; |
| 4519 |
|
varPtr = framePtr->compiledLocals; |
| 4520 |
|
for (i = 0; i < numLocals; i++) { |
| 4521 |
|
/* |
| 4522 |
|
* For global/upvar variables referenced in procedures, decrement |
| 4523 |
|
* the reference count on the variable referred to, and free |
| 4524 |
|
* the referenced variable if it's no longer needed. Don't delete |
| 4525 |
|
* the hash entry for the other variable if it's in the same table |
| 4526 |
|
* as us: this will happen automatically later on. |
| 4527 |
|
*/ |
| 4528 |
|
|
| 4529 |
|
if (TclIsVarLink(varPtr)) { |
| 4530 |
|
linkPtr = varPtr->value.linkPtr; |
| 4531 |
|
linkPtr->refCount--; |
| 4532 |
|
if ((linkPtr->refCount == 0) && TclIsVarUndefined(linkPtr) |
| 4533 |
|
&& (linkPtr->tracePtr == NULL) |
| 4534 |
|
&& (linkPtr->flags & VAR_IN_HASHTABLE)) { |
| 4535 |
|
if (linkPtr->hPtr == NULL) { |
| 4536 |
|
ckfree((char *) linkPtr); |
| 4537 |
|
} else { |
| 4538 |
|
Tcl_DeleteHashEntry(linkPtr->hPtr); |
| 4539 |
|
ckfree((char *) linkPtr); |
| 4540 |
|
} |
| 4541 |
|
} |
| 4542 |
|
} |
| 4543 |
|
|
| 4544 |
|
/* |
| 4545 |
|
* Invoke traces on the variable that is being deleted. Then delete |
| 4546 |
|
* the variable's trace records. |
| 4547 |
|
*/ |
| 4548 |
|
|
| 4549 |
|
if (varPtr->tracePtr != NULL) { |
| 4550 |
|
(void) CallTraces(iPtr, (Var *) NULL, varPtr, |
| 4551 |
|
varPtr->name, (char *) NULL, flags); |
| 4552 |
|
while (varPtr->tracePtr != NULL) { |
| 4553 |
|
VarTrace *tracePtr = varPtr->tracePtr; |
| 4554 |
|
varPtr->tracePtr = tracePtr->nextPtr; |
| 4555 |
|
ckfree((char *) tracePtr); |
| 4556 |
|
} |
| 4557 |
|
for (activePtr = iPtr->activeTracePtr; activePtr != NULL; |
| 4558 |
|
activePtr = activePtr->nextPtr) { |
| 4559 |
|
if (activePtr->varPtr == varPtr) { |
| 4560 |
|
activePtr->nextTracePtr = NULL; |
| 4561 |
|
} |
| 4562 |
|
} |
| 4563 |
|
} |
| 4564 |
|
|
| 4565 |
|
/* |
| 4566 |
|
* Now if the variable is an array, delete its element hash table. |
| 4567 |
|
* Otherwise, if it's a scalar variable, decrement the ref count |
| 4568 |
|
* of its value. |
| 4569 |
|
*/ |
| 4570 |
|
|
| 4571 |
|
if (TclIsVarArray(varPtr) && (varPtr->value.tablePtr != NULL)) { |
| 4572 |
|
DeleteArray(iPtr, varPtr->name, varPtr, flags); |
| 4573 |
|
} |
| 4574 |
|
if (TclIsVarScalar(varPtr) && (varPtr->value.objPtr != NULL)) { |
| 4575 |
|
TclDecrRefCount(varPtr->value.objPtr); |
| 4576 |
|
varPtr->value.objPtr = NULL; |
| 4577 |
|
} |
| 4578 |
|
varPtr->hPtr = NULL; |
| 4579 |
|
varPtr->tracePtr = NULL; |
| 4580 |
|
TclSetVarUndefined(varPtr); |
| 4581 |
|
TclSetVarScalar(varPtr); |
| 4582 |
|
varPtr++; |
| 4583 |
|
} |
| 4584 |
|
} |
| 4585 |
|
|
| 4586 |
|
/* |
| 4587 |
|
*---------------------------------------------------------------------- |
| 4588 |
|
* |
| 4589 |
|
* DeleteArray -- |
| 4590 |
|
* |
| 4591 |
|
* This procedure is called to free up everything in an array |
| 4592 |
|
* variable. It's the caller's responsibility to make sure |
| 4593 |
|
* that the array is no longer accessible before this procedure |
| 4594 |
|
* is called. |
| 4595 |
|
* |
| 4596 |
|
* Results: |
| 4597 |
|
* None. |
| 4598 |
|
* |
| 4599 |
|
* Side effects: |
| 4600 |
|
* All storage associated with varPtr's array elements is deleted |
| 4601 |
|
* (including the array's hash table). Deletion trace procedures for |
| 4602 |
|
* array elements are invoked, then deleted. Any pending traces for |
| 4603 |
|
* array elements are also deleted. |
| 4604 |
|
* |
| 4605 |
|
*---------------------------------------------------------------------- |
| 4606 |
|
*/ |
| 4607 |
|
|
| 4608 |
|
static void |
| 4609 |
|
DeleteArray(iPtr, arrayName, varPtr, flags) |
| 4610 |
|
Interp *iPtr; /* Interpreter containing array. */ |
| 4611 |
|
char *arrayName; /* Name of array (used for trace |
| 4612 |
|
* callbacks). */ |
| 4613 |
|
Var *varPtr; /* Pointer to variable structure. */ |
| 4614 |
|
int flags; /* Flags to pass to CallTraces: |
| 4615 |
|
* TCL_TRACE_UNSETS and sometimes |
| 4616 |
|
* TCL_INTERP_DESTROYED, |
| 4617 |
|
* TCL_NAMESPACE_ONLY, or |
| 4618 |
|
* TCL_GLOBAL_ONLY. */ |
| 4619 |
|
{ |
| 4620 |
|
Tcl_HashSearch search; |
| 4621 |
|
register Tcl_HashEntry *hPtr; |
| 4622 |
|
register Var *elPtr; |
| 4623 |
|
ActiveVarTrace *activePtr; |
| 4624 |
|
Tcl_Obj *objPtr; |
| 4625 |
|
|
| 4626 |
|
DeleteSearches(varPtr); |
| 4627 |
|
for (hPtr = Tcl_FirstHashEntry(varPtr->value.tablePtr, &search); |
| 4628 |
|
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { |
| 4629 |
|
elPtr = (Var *) Tcl_GetHashValue(hPtr); |
| 4630 |
|
if (TclIsVarScalar(elPtr) && (elPtr->value.objPtr != NULL)) { |
| 4631 |
|
objPtr = elPtr->value.objPtr; |
| 4632 |
|
TclDecrRefCount(objPtr); |
| 4633 |
|
elPtr->value.objPtr = NULL; |
| 4634 |
|
} |
| 4635 |
|
elPtr->hPtr = NULL; |
| 4636 |
|
if (elPtr->tracePtr != NULL) { |
| 4637 |
|
elPtr->flags &= ~VAR_TRACE_ACTIVE; |
| 4638 |
|
(void) CallTraces(iPtr, (Var *) NULL, elPtr, arrayName, |
| 4639 |
|
Tcl_GetHashKey(varPtr->value.tablePtr, hPtr), flags); |
| 4640 |
|
while (elPtr->tracePtr != NULL) { |
| 4641 |
|
VarTrace *tracePtr = elPtr->tracePtr; |
| 4642 |
|
elPtr->tracePtr = tracePtr->nextPtr; |
| 4643 |
|
ckfree((char *) tracePtr); |
| 4644 |
|
} |
| 4645 |
|
for (activePtr = iPtr->activeTracePtr; activePtr != NULL; |
| 4646 |
|
activePtr = activePtr->nextPtr) { |
| 4647 |
|
if (activePtr->varPtr == elPtr) { |
| 4648 |
|
activePtr->nextTracePtr = NULL; |
| 4649 |
|
} |
| 4650 |
|
} |
| 4651 |
|
} |
| 4652 |
|
TclSetVarUndefined(elPtr); |
| 4653 |
|
TclSetVarScalar(elPtr); |
| 4654 |
|
if (elPtr->refCount == 0) { |
| 4655 |
|
ckfree((char *) elPtr); /* element Vars are VAR_IN_HASHTABLE */ |
| 4656 |
|
} |
| 4657 |
|
} |
| 4658 |
|
Tcl_DeleteHashTable(varPtr->value.tablePtr); |
| 4659 |
|
ckfree((char *) varPtr->value.tablePtr); |
| 4660 |
|
} |
| 4661 |
|
|
| 4662 |
|
/* |
| 4663 |
|
*---------------------------------------------------------------------- |
| 4664 |
|
* |
| 4665 |
|
* CleanupVar -- |
| 4666 |
|
* |
| 4667 |
|
* This procedure is called when it looks like it may be OK to free up |
| 4668 |
|
* a variable's storage. If the variable is in a hashtable, its Var |
| 4669 |
|
* structure and hash table entry will be freed along with those of its |
| 4670 |
|
* containing array, if any. This procedure is called, for example, |
| 4671 |
|
* when a trace on a variable deletes a variable. |
| 4672 |
|
* |
| 4673 |
|
* Results: |
| 4674 |
|
* None. |
| 4675 |
|
* |
| 4676 |
|
* Side effects: |
| 4677 |
|
* If the variable (or its containing array) really is dead and in a |
| 4678 |
|
* hashtable, then its Var structure, and possibly its hash table |
| 4679 |
|
* entry, is freed up. |
| 4680 |
|
* |
| 4681 |
|
*---------------------------------------------------------------------- |
| 4682 |
|
*/ |
| 4683 |
|
|
| 4684 |
|
static void |
| 4685 |
|
CleanupVar(varPtr, arrayPtr) |
| 4686 |
|
Var *varPtr; /* Pointer to variable that may be a |
| 4687 |
|
* candidate for being expunged. */ |
| 4688 |
|
Var *arrayPtr; /* Array that contains the variable, or |
| 4689 |
|
* NULL if this variable isn't an array |
| 4690 |
|
* element. */ |
| 4691 |
|
{ |
| 4692 |
|
if (TclIsVarUndefined(varPtr) && (varPtr->refCount == 0) |
| 4693 |
|
&& (varPtr->tracePtr == NULL) |
| 4694 |
|
&& (varPtr->flags & VAR_IN_HASHTABLE)) { |
| 4695 |
|
if (varPtr->hPtr != NULL) { |
| 4696 |
|
Tcl_DeleteHashEntry(varPtr->hPtr); |
| 4697 |
|
} |
| 4698 |
|
ckfree((char *) varPtr); |
| 4699 |
|
} |
| 4700 |
|
if (arrayPtr != NULL) { |
| 4701 |
|
if (TclIsVarUndefined(arrayPtr) && (arrayPtr->refCount == 0) |
| 4702 |
|
&& (arrayPtr->tracePtr == NULL) |
| 4703 |
|
&& (arrayPtr->flags & VAR_IN_HASHTABLE)) { |
| 4704 |
|
if (arrayPtr->hPtr != NULL) { |
| 4705 |
|
Tcl_DeleteHashEntry(arrayPtr->hPtr); |
| 4706 |
|
} |
| 4707 |
|
ckfree((char *) arrayPtr); |
| 4708 |
|
} |
| 4709 |
|
} |
| 4710 |
|
} |
| 4711 |
|
/* |
| 4712 |
|
*---------------------------------------------------------------------- |
| 4713 |
|
* |
| 4714 |
|
* VarErrMsg -- |
| 4715 |
|
* |
| 4716 |
|
* Generate a reasonable error message describing why a variable |
| 4717 |
|
* operation failed. |
| 4718 |
|
* |
| 4719 |
|
* Results: |
| 4720 |
|
* None. |
| 4721 |
|
* |
| 4722 |
|
* Side effects: |
| 4723 |
|
* The interp's result is set to hold a message identifying the |
| 4724 |
|
* variable given by part1 and part2 and describing why the |
| 4725 |
|
* variable operation failed. |
| 4726 |
|
* |
| 4727 |
|
*---------------------------------------------------------------------- |
| 4728 |
|
*/ |
| 4729 |
|
|
| 4730 |
|
static void |
| 4731 |
|
VarErrMsg(interp, part1, part2, operation, reason) |
| 4732 |
|
Tcl_Interp *interp; /* Interpreter in which to record message. */ |
| 4733 |
|
char *part1, *part2; /* Variable's two-part name. */ |
| 4734 |
|
char *operation; /* String describing operation that failed, |
| 4735 |
|
* e.g. "read", "set", or "unset". */ |
| 4736 |
|
char *reason; /* String describing why operation failed. */ |
| 4737 |
|
{ |
| 4738 |
|
Tcl_ResetResult(interp); |
| 4739 |
|
Tcl_AppendResult(interp, "can't ", operation, " \"", part1, |
| 4740 |
|
(char *) NULL); |
| 4741 |
|
if (part2 != NULL) { |
| 4742 |
|
Tcl_AppendResult(interp, "(", part2, ")", (char *) NULL); |
| 4743 |
|
} |
| 4744 |
|
Tcl_AppendResult(interp, "\": ", reason, (char *) NULL); |
| 4745 |
|
} |
| 4746 |
|
|
| 4747 |
|
|
| 4748 |
|
/* |
| 4749 |
|
*---------------------------------------------------------------------- |
| 4750 |
|
* |
| 4751 |
|
* TclTraceVarExists -- |
| 4752 |
|
* |
| 4753 |
|
* This is called from info exists. We need to trigger read |
| 4754 |
|
* and/or array traces because they may end up creating a |
| 4755 |
|
* variable that doesn't currently exist. |
| 4756 |
|
* |
| 4757 |
|
* Results: |
| 4758 |
|
* A pointer to the Var structure, or NULL. |
| 4759 |
|
* |
| 4760 |
|
* Side effects: |
| 4761 |
|
* May fill in error messages in the interp. |
| 4762 |
|
* |
| 4763 |
|
*---------------------------------------------------------------------- |
| 4764 |
|
*/ |
| 4765 |
|
|
| 4766 |
|
Var * |
| 4767 |
|
TclVarTraceExists(interp, varName) |
| 4768 |
|
Tcl_Interp *interp; /* The interpreter */ |
| 4769 |
|
char *varName; /* The variable name */ |
| 4770 |
|
{ |
| 4771 |
|
Var *varPtr; |
| 4772 |
|
Var *arrayPtr; |
| 4773 |
|
char *msg; |
| 4774 |
|
|
| 4775 |
|
/* |
| 4776 |
|
* The choice of "create" flag values is delicate here, and |
| 4777 |
|
* matches the semantics of GetVar. Things are still not perfect, |
| 4778 |
|
* however, because if you do "info exists x" you get a varPtr |
| 4779 |
|
* and therefore trigger traces. However, if you do |
| 4780 |
|
* "info exists x(i)", then you only get a varPtr if x is already |
| 4781 |
|
* known to be an array. Otherwise you get NULL, and no trace |
| 4782 |
|
* is triggered. This matches Tcl 7.6 semantics. |
| 4783 |
|
*/ |
| 4784 |
|
|
| 4785 |
|
varPtr = TclLookupVar(interp, varName, (char *) NULL, |
| 4786 |
|
0, "access", |
| 4787 |
|
/*createPart1*/ 0, /*createPart2*/ 1, &arrayPtr); |
| 4788 |
|
if (varPtr == NULL) { |
| 4789 |
|
return NULL; |
| 4790 |
|
} |
| 4791 |
|
if ((varPtr != NULL) && |
| 4792 |
|
((varPtr->tracePtr != NULL) |
| 4793 |
|
|| ((arrayPtr != NULL) && (arrayPtr->tracePtr != NULL)))) { |
| 4794 |
|
msg = CallTraces((Interp *)interp, arrayPtr, varPtr, varName, |
| 4795 |
|
(char *) NULL, TCL_TRACE_READS); |
| 4796 |
|
if (msg != NULL) { |
| 4797 |
|
/* |
| 4798 |
|
* If the variable doesn't exist anymore and no-one's using |
| 4799 |
|
* it, then free up the relevant structures and hash table entries. |
| 4800 |
|
*/ |
| 4801 |
|
|
| 4802 |
|
if (TclIsVarUndefined(varPtr)) { |
| 4803 |
|
CleanupVar(varPtr, arrayPtr); |
| 4804 |
|
} |
| 4805 |
|
return NULL; |
| 4806 |
|
} |
| 4807 |
|
} |
| 4808 |
|
return varPtr; |
| 4809 |
|
} |
| 4810 |
|
|
| 4811 |
|
/* End of tclvar.c */ |
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