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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tcl_base/tclnamesp.c,v 1.1.1.1 2001/06/13 04:43:37 dtashley Exp $ */ |
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/* |
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* tclNamesp.c -- |
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* |
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* Contains support for namespaces, which provide a separate context of |
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* commands and global variables. The global :: namespace is the |
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* traditional Tcl "global" scope. Other namespaces are created as |
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* children of the global namespace. These other namespaces contain |
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* special-purpose commands and variables for packages. |
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* |
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* Copyright (c) 1993-1997 Lucent Technologies. |
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* Copyright (c) 1997 Sun Microsystems, Inc. |
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* Copyright (c) 1998-1999 by Scriptics Corporation. |
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* |
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* Originally implemented by |
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* Michael J. McLennan |
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* Bell Labs Innovations for Lucent Technologies |
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* mmclennan@lucent.com |
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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: tclnamesp.c,v 1.1.1.1 2001/06/13 04:43:37 dtashley Exp $ |
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*/ |
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#include "tclInt.h" |
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/* |
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* Flag passed to TclGetNamespaceForQualName to indicate that it should |
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* search for a namespace rather than a command or variable inside a |
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* namespace. Note that this flag's value must not conflict with the values |
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* of TCL_GLOBAL_ONLY, TCL_NAMESPACE_ONLY, or CREATE_NS_IF_UNKNOWN. |
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*/ |
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#define FIND_ONLY_NS 0x1000 |
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/* |
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* Initial size of stack allocated space for tail list - used when resetting |
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* shadowed command references in the functin: TclResetShadowedCmdRefs. |
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*/ |
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#define NUM_TRAIL_ELEMS 5 |
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/* |
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* Count of the number of namespaces created. This value is used as a |
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* unique id for each namespace. |
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*/ |
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static long numNsCreated = 0; |
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TCL_DECLARE_MUTEX(nsMutex) |
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/* |
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* This structure contains a cached pointer to a namespace that is the |
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* result of resolving the namespace's name in some other namespace. It is |
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* the internal representation for a nsName object. It contains the |
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* pointer along with some information that is used to check the cached |
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* pointer's validity. |
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*/ |
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typedef struct ResolvedNsName { |
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Namespace *nsPtr; /* A cached namespace pointer. */ |
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long nsId; /* nsPtr's unique namespace id. Used to |
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* verify that nsPtr is still valid |
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* (e.g., it's possible that the namespace |
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* was deleted and a new one created at |
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* the same address). */ |
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Namespace *refNsPtr; /* Points to the namespace containing the |
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* reference (not the namespace that |
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* contains the referenced namespace). */ |
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int refCount; /* Reference count: 1 for each nsName |
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* object that has a pointer to this |
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* ResolvedNsName structure as its internal |
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* rep. This structure can be freed when |
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* refCount becomes zero. */ |
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} ResolvedNsName; |
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/* |
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* Declarations for procedures local to this file: |
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*/ |
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static void DeleteImportedCmd _ANSI_ARGS_(( |
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ClientData clientData)); |
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static void DupNsNameInternalRep _ANSI_ARGS_((Tcl_Obj *objPtr, |
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Tcl_Obj *copyPtr)); |
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static void FreeNsNameInternalRep _ANSI_ARGS_(( |
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Tcl_Obj *objPtr)); |
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static int GetNamespaceFromObj _ANSI_ARGS_(( |
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Tcl_Interp *interp, Tcl_Obj *objPtr, |
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Tcl_Namespace **nsPtrPtr)); |
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static int InvokeImportedCmd _ANSI_ARGS_(( |
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ClientData clientData, Tcl_Interp *interp, |
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int objc, Tcl_Obj *CONST objv[])); |
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static int NamespaceChildrenCmd _ANSI_ARGS_(( |
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ClientData dummy, Tcl_Interp *interp, |
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int objc, Tcl_Obj *CONST objv[])); |
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static int NamespaceCodeCmd _ANSI_ARGS_(( |
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ClientData dummy, Tcl_Interp *interp, |
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int objc, Tcl_Obj *CONST objv[])); |
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static int NamespaceCurrentCmd _ANSI_ARGS_(( |
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ClientData dummy, Tcl_Interp *interp, |
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int objc, Tcl_Obj *CONST objv[])); |
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static int NamespaceDeleteCmd _ANSI_ARGS_(( |
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ClientData dummy, Tcl_Interp *interp, |
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int objc, Tcl_Obj *CONST objv[])); |
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static int NamespaceEvalCmd _ANSI_ARGS_(( |
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ClientData dummy, Tcl_Interp *interp, |
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int objc, Tcl_Obj *CONST objv[])); |
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static int NamespaceExportCmd _ANSI_ARGS_(( |
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ClientData dummy, Tcl_Interp *interp, |
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int objc, Tcl_Obj *CONST objv[])); |
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static int NamespaceForgetCmd _ANSI_ARGS_(( |
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ClientData dummy, Tcl_Interp *interp, |
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int objc, Tcl_Obj *CONST objv[])); |
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static void NamespaceFree _ANSI_ARGS_((Namespace *nsPtr)); |
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static int NamespaceImportCmd _ANSI_ARGS_(( |
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ClientData dummy, Tcl_Interp *interp, |
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int objc, Tcl_Obj *CONST objv[])); |
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static int NamespaceInscopeCmd _ANSI_ARGS_(( |
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ClientData dummy, Tcl_Interp *interp, |
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int objc, Tcl_Obj *CONST objv[])); |
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static int NamespaceOriginCmd _ANSI_ARGS_(( |
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ClientData dummy, Tcl_Interp *interp, |
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int objc, Tcl_Obj *CONST objv[])); |
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static int NamespaceParentCmd _ANSI_ARGS_(( |
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ClientData dummy, Tcl_Interp *interp, |
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int objc, Tcl_Obj *CONST objv[])); |
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static int NamespaceQualifiersCmd _ANSI_ARGS_(( |
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ClientData dummy, Tcl_Interp *interp, |
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int objc, Tcl_Obj *CONST objv[])); |
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static int NamespaceTailCmd _ANSI_ARGS_(( |
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ClientData dummy, Tcl_Interp *interp, |
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int objc, Tcl_Obj *CONST objv[])); |
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static int NamespaceWhichCmd _ANSI_ARGS_(( |
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ClientData dummy, Tcl_Interp *interp, |
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int objc, Tcl_Obj *CONST objv[])); |
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static int SetNsNameFromAny _ANSI_ARGS_(( |
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Tcl_Interp *interp, Tcl_Obj *objPtr)); |
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static void UpdateStringOfNsName _ANSI_ARGS_((Tcl_Obj *objPtr)); |
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/* |
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* This structure defines a Tcl object type that contains a |
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* namespace reference. It is used in commands that take the |
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* name of a namespace as an argument. The namespace reference |
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* is resolved, and the result in cached in the object. |
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*/ |
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Tcl_ObjType tclNsNameType = { |
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"nsName", /* the type's name */ |
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FreeNsNameInternalRep, /* freeIntRepProc */ |
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DupNsNameInternalRep, /* dupIntRepProc */ |
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UpdateStringOfNsName, /* updateStringProc */ |
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SetNsNameFromAny /* setFromAnyProc */ |
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}; |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* TclInitNamespaceSubsystem -- |
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* |
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* This procedure is called to initialize all the structures that |
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* are used by namespaces on a per-process basis. |
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* |
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* Results: |
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* None. |
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* |
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* Side effects: |
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* The namespace object type is registered with the Tcl compiler. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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void |
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TclInitNamespaceSubsystem() |
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{ |
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Tcl_RegisterObjType(&tclNsNameType); |
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} |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* Tcl_GetCurrentNamespace -- |
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* |
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* Returns a pointer to an interpreter's currently active namespace. |
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* |
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* Results: |
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* Returns a pointer to the interpreter's current namespace. |
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* |
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* Side effects: |
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* None. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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Tcl_Namespace * |
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Tcl_GetCurrentNamespace(interp) |
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register Tcl_Interp *interp; /* Interpreter whose current namespace is |
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* being queried. */ |
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{ |
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register Interp *iPtr = (Interp *) interp; |
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register Namespace *nsPtr; |
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if (iPtr->varFramePtr != NULL) { |
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nsPtr = iPtr->varFramePtr->nsPtr; |
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} else { |
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nsPtr = iPtr->globalNsPtr; |
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} |
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return (Tcl_Namespace *) nsPtr; |
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} |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* Tcl_GetGlobalNamespace -- |
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* |
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* Returns a pointer to an interpreter's global :: namespace. |
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* |
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* Results: |
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* Returns a pointer to the specified interpreter's global namespace. |
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* |
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* Side effects: |
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* None. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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Tcl_Namespace * |
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Tcl_GetGlobalNamespace(interp) |
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register Tcl_Interp *interp; /* Interpreter whose global namespace |
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* should be returned. */ |
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{ |
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register Interp *iPtr = (Interp *) interp; |
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return (Tcl_Namespace *) iPtr->globalNsPtr; |
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} |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* Tcl_PushCallFrame -- |
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* |
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* Pushes a new call frame onto the interpreter's Tcl call stack. |
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* Called when executing a Tcl procedure or a "namespace eval" or |
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* "namespace inscope" command. |
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* |
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* Results: |
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* Returns TCL_OK if successful, or TCL_ERROR (along with an error |
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* message in the interpreter's result object) if something goes wrong. |
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* |
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* Side effects: |
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* Modifies the interpreter's Tcl call stack. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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int |
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Tcl_PushCallFrame(interp, callFramePtr, namespacePtr, isProcCallFrame) |
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Tcl_Interp *interp; /* Interpreter in which the new call frame |
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* is to be pushed. */ |
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Tcl_CallFrame *callFramePtr; /* Points to a call frame structure to |
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* push. Storage for this has already been |
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* allocated by the caller; typically this |
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* is the address of a CallFrame structure |
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* allocated on the caller's C stack. The |
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* call frame will be initialized by this |
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* procedure. The caller can pop the frame |
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* later with Tcl_PopCallFrame, and it is |
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* responsible for freeing the frame's |
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* storage. */ |
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Tcl_Namespace *namespacePtr; /* Points to the namespace in which the |
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* frame will execute. If NULL, the |
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* interpreter's current namespace will |
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* be used. */ |
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int isProcCallFrame; /* If nonzero, the frame represents a |
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* called Tcl procedure and may have local |
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* vars. Vars will ordinarily be looked up |
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* in the frame. If new variables are |
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* created, they will be created in the |
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* frame. If 0, the frame is for a |
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* "namespace eval" or "namespace inscope" |
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* command and var references are treated |
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* as references to namespace variables. */ |
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{ |
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Interp *iPtr = (Interp *) interp; |
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register CallFrame *framePtr = (CallFrame *) callFramePtr; |
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register Namespace *nsPtr; |
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if (namespacePtr == NULL) { |
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nsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
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} else { |
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nsPtr = (Namespace *) namespacePtr; |
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if (nsPtr->flags & NS_DEAD) { |
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panic("Trying to push call frame for dead namespace"); |
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/*NOTREACHED*/ |
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} |
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} |
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nsPtr->activationCount++; |
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framePtr->nsPtr = nsPtr; |
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framePtr->isProcCallFrame = isProcCallFrame; |
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framePtr->objc = 0; |
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framePtr->objv = NULL; |
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framePtr->callerPtr = iPtr->framePtr; |
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framePtr->callerVarPtr = iPtr->varFramePtr; |
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if (iPtr->varFramePtr != NULL) { |
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framePtr->level = (iPtr->varFramePtr->level + 1); |
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} else { |
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framePtr->level = 1; |
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} |
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framePtr->procPtr = NULL; /* no called procedure */ |
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framePtr->varTablePtr = NULL; /* and no local variables */ |
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framePtr->numCompiledLocals = 0; |
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framePtr->compiledLocals = NULL; |
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/* |
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* Push the new call frame onto the interpreter's stack of procedure |
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* call frames making it the current frame. |
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*/ |
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iPtr->framePtr = framePtr; |
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iPtr->varFramePtr = framePtr; |
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return TCL_OK; |
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} |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* Tcl_PopCallFrame -- |
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* |
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* Removes a call frame from the Tcl call stack for the interpreter. |
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* Called to remove a frame previously pushed by Tcl_PushCallFrame. |
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* |
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* Results: |
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* None. |
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* |
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* Side effects: |
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* Modifies the call stack of the interpreter. Resets various fields of |
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* the popped call frame. If a namespace has been deleted and |
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* has no more activations on the call stack, the namespace is |
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* destroyed. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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void |
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Tcl_PopCallFrame(interp) |
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Tcl_Interp* interp; /* Interpreter with call frame to pop. */ |
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{ |
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register Interp *iPtr = (Interp *) interp; |
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register CallFrame *framePtr = iPtr->framePtr; |
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int saveErrFlag; |
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Namespace *nsPtr; |
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/* |
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* It's important to remove the call frame from the interpreter's stack |
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* of call frames before deleting local variables, so that traces |
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* invoked by the variable deletion don't see the partially-deleted |
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* frame. |
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*/ |
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iPtr->framePtr = framePtr->callerPtr; |
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iPtr->varFramePtr = framePtr->callerVarPtr; |
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/* |
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* Delete the local variables. As a hack, we save then restore the |
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* ERR_IN_PROGRESS flag in the interpreter. The problem is that there |
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* could be unset traces on the variables, which cause scripts to be |
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* evaluated. This will clear the ERR_IN_PROGRESS flag, losing stack |
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* trace information if the procedure was exiting with an error. The |
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* code below preserves the flag. Unfortunately, that isn't really |
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* enough: we really should preserve the errorInfo variable too |
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* (otherwise a nested error in the trace script will trash errorInfo). |
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* What's really needed is a general-purpose mechanism for saving and |
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* restoring interpreter state. |
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*/ |
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saveErrFlag = (iPtr->flags & ERR_IN_PROGRESS); |
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if (framePtr->varTablePtr != NULL) { |
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TclDeleteVars(iPtr, framePtr->varTablePtr); |
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ckfree((char *) framePtr->varTablePtr); |
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framePtr->varTablePtr = NULL; |
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} |
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if (framePtr->numCompiledLocals > 0) { |
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TclDeleteCompiledLocalVars(iPtr, framePtr); |
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} |
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iPtr->flags |= saveErrFlag; |
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/* |
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* Decrement the namespace's count of active call frames. If the |
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* namespace is "dying" and there are no more active call frames, |
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* call Tcl_DeleteNamespace to destroy it. |
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*/ |
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nsPtr = framePtr->nsPtr; |
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nsPtr->activationCount--; |
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if ((nsPtr->flags & NS_DYING) |
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&& (nsPtr->activationCount == 0)) { |
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Tcl_DeleteNamespace((Tcl_Namespace *) nsPtr); |
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} |
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framePtr->nsPtr = NULL; |
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} |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* Tcl_CreateNamespace -- |
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* |
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* Creates a new namespace with the given name. If there is no |
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* active namespace (i.e., the interpreter is being initialized), |
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* the global :: namespace is created and returned. |
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* |
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* Results: |
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* Returns a pointer to the new namespace if successful. If the |
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* namespace already exists or if another error occurs, this routine |
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* returns NULL, along with an error message in the interpreter's |
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* result object. |
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* |
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* Side effects: |
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* If the name contains "::" qualifiers and a parent namespace does |
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* not already exist, it is automatically created. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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Tcl_Namespace * |
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Tcl_CreateNamespace(interp, name, clientData, deleteProc) |
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Tcl_Interp *interp; /* Interpreter in which a new namespace |
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* is being created. Also used for |
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* error reporting. */ |
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char *name; /* Name for the new namespace. May be a |
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* qualified name with names of ancestor |
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* namespaces separated by "::"s. */ |
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ClientData clientData; /* One-word value to store with |
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* namespace. */ |
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Tcl_NamespaceDeleteProc *deleteProc; |
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/* Procedure called to delete client |
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* data when the namespace is deleted. |
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* NULL if no procedure should be |
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* called. */ |
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{ |
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Interp *iPtr = (Interp *) interp; |
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register Namespace *nsPtr, *ancestorPtr; |
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Namespace *parentPtr, *dummy1Ptr, *dummy2Ptr; |
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Namespace *globalNsPtr = iPtr->globalNsPtr; |
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char *simpleName; |
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Tcl_HashEntry *entryPtr; |
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Tcl_DString buffer1, buffer2; |
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int newEntry; |
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/* |
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* If there is no active namespace, the interpreter is being |
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* initialized. |
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*/ |
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if ((globalNsPtr == NULL) && (iPtr->varFramePtr == NULL)) { |
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/* |
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* Treat this namespace as the global namespace, and avoid |
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* looking for a parent. |
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*/ |
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parentPtr = NULL; |
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simpleName = ""; |
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} else if (*name == '\0') { |
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Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
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"can't create namespace \"\": only global namespace can have empty name", (char *) NULL); |
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return NULL; |
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} else { |
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/* |
|
|
* Find the parent for the new namespace. |
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*/ |
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TclGetNamespaceForQualName(interp, name, (Namespace *) NULL, |
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/*flags*/ (CREATE_NS_IF_UNKNOWN | TCL_LEAVE_ERR_MSG), |
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&parentPtr, &dummy1Ptr, &dummy2Ptr, &simpleName); |
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/* |
|
|
* If the unqualified name at the end is empty, there were trailing |
|
|
* "::"s after the namespace's name which we ignore. The new |
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|
* namespace was already (recursively) created and is pointed to |
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* by parentPtr. |
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|
*/ |
|
|
|
|
|
if (*simpleName == '\0') { |
|
|
return (Tcl_Namespace *) parentPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Check for a bad namespace name and make sure that the name |
|
|
* does not already exist in the parent namespace. |
|
|
*/ |
|
|
|
|
|
if (Tcl_FindHashEntry(&parentPtr->childTable, simpleName) != NULL) { |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
|
|
"can't create namespace \"", name, |
|
|
"\": already exists", (char *) NULL); |
|
|
return NULL; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Create the new namespace and root it in its parent. Increment the |
|
|
* count of namespaces created. |
|
|
*/ |
|
|
|
|
|
|
|
|
nsPtr = (Namespace *) ckalloc(sizeof(Namespace)); |
|
|
nsPtr->name = (char *) ckalloc((unsigned) (strlen(simpleName)+1)); |
|
|
strcpy(nsPtr->name, simpleName); |
|
|
nsPtr->fullName = NULL; /* set below */ |
|
|
nsPtr->clientData = clientData; |
|
|
nsPtr->deleteProc = deleteProc; |
|
|
nsPtr->parentPtr = parentPtr; |
|
|
Tcl_InitHashTable(&nsPtr->childTable, TCL_STRING_KEYS); |
|
|
Tcl_MutexLock(&nsMutex); |
|
|
numNsCreated++; |
|
|
nsPtr->nsId = numNsCreated; |
|
|
Tcl_MutexUnlock(&nsMutex); |
|
|
nsPtr->interp = interp; |
|
|
nsPtr->flags = 0; |
|
|
nsPtr->activationCount = 0; |
|
|
nsPtr->refCount = 0; |
|
|
Tcl_InitHashTable(&nsPtr->cmdTable, TCL_STRING_KEYS); |
|
|
Tcl_InitHashTable(&nsPtr->varTable, TCL_STRING_KEYS); |
|
|
nsPtr->exportArrayPtr = NULL; |
|
|
nsPtr->numExportPatterns = 0; |
|
|
nsPtr->maxExportPatterns = 0; |
|
|
nsPtr->cmdRefEpoch = 0; |
|
|
nsPtr->resolverEpoch = 0; |
|
|
nsPtr->cmdResProc = NULL; |
|
|
nsPtr->varResProc = NULL; |
|
|
nsPtr->compiledVarResProc = NULL; |
|
|
|
|
|
if (parentPtr != NULL) { |
|
|
entryPtr = Tcl_CreateHashEntry(&parentPtr->childTable, simpleName, |
|
|
&newEntry); |
|
|
Tcl_SetHashValue(entryPtr, (ClientData) nsPtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
* Build the fully qualified name for this namespace. |
|
|
*/ |
|
|
|
|
|
Tcl_DStringInit(&buffer1); |
|
|
Tcl_DStringInit(&buffer2); |
|
|
for (ancestorPtr = nsPtr; ancestorPtr != NULL; |
|
|
ancestorPtr = ancestorPtr->parentPtr) { |
|
|
if (ancestorPtr != globalNsPtr) { |
|
|
Tcl_DStringAppend(&buffer1, "::", 2); |
|
|
Tcl_DStringAppend(&buffer1, ancestorPtr->name, -1); |
|
|
} |
|
|
Tcl_DStringAppend(&buffer1, Tcl_DStringValue(&buffer2), -1); |
|
|
|
|
|
Tcl_DStringSetLength(&buffer2, 0); |
|
|
Tcl_DStringAppend(&buffer2, Tcl_DStringValue(&buffer1), -1); |
|
|
Tcl_DStringSetLength(&buffer1, 0); |
|
|
} |
|
|
|
|
|
name = Tcl_DStringValue(&buffer2); |
|
|
nsPtr->fullName = (char *) ckalloc((unsigned) (strlen(name)+1)); |
|
|
strcpy(nsPtr->fullName, name); |
|
|
|
|
|
Tcl_DStringFree(&buffer1); |
|
|
Tcl_DStringFree(&buffer2); |
|
|
|
|
|
/* |
|
|
* Return a pointer to the new namespace. |
|
|
*/ |
|
|
|
|
|
return (Tcl_Namespace *) nsPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_DeleteNamespace -- |
|
|
* |
|
|
* Deletes a namespace and all of the commands, variables, and other |
|
|
* namespaces within it. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* When a namespace is deleted, it is automatically removed as a |
|
|
* child of its parent namespace. Also, all its commands, variables |
|
|
* and child namespaces are deleted. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
Tcl_DeleteNamespace(namespacePtr) |
|
|
Tcl_Namespace *namespacePtr; /* Points to the namespace to delete. */ |
|
|
{ |
|
|
register Namespace *nsPtr = (Namespace *) namespacePtr; |
|
|
Interp *iPtr = (Interp *) nsPtr->interp; |
|
|
Namespace *globalNsPtr = |
|
|
(Namespace *) Tcl_GetGlobalNamespace((Tcl_Interp *) iPtr); |
|
|
Tcl_HashEntry *entryPtr; |
|
|
|
|
|
/* |
|
|
* If the namespace is on the call frame stack, it is marked as "dying" |
|
|
* (NS_DYING is OR'd into its flags): the namespace can't be looked up |
|
|
* by name but its commands and variables are still usable by those |
|
|
* active call frames. When all active call frames referring to the |
|
|
* namespace have been popped from the Tcl stack, Tcl_PopCallFrame will |
|
|
* call this procedure again to delete everything in the namespace. |
|
|
* If no nsName objects refer to the namespace (i.e., if its refCount |
|
|
* is zero), its commands and variables are deleted and the storage for |
|
|
* its namespace structure is freed. Otherwise, if its refCount is |
|
|
* nonzero, the namespace's commands and variables are deleted but the |
|
|
* structure isn't freed. Instead, NS_DEAD is OR'd into the structure's |
|
|
* flags to allow the namespace resolution code to recognize that the |
|
|
* namespace is "deleted". The structure's storage is freed by |
|
|
* FreeNsNameInternalRep when its refCount reaches 0. |
|
|
*/ |
|
|
|
|
|
if (nsPtr->activationCount > 0) { |
|
|
nsPtr->flags |= NS_DYING; |
|
|
if (nsPtr->parentPtr != NULL) { |
|
|
entryPtr = Tcl_FindHashEntry(&nsPtr->parentPtr->childTable, |
|
|
nsPtr->name); |
|
|
if (entryPtr != NULL) { |
|
|
Tcl_DeleteHashEntry(entryPtr); |
|
|
} |
|
|
} |
|
|
nsPtr->parentPtr = NULL; |
|
|
} else { |
|
|
/* |
|
|
* Delete the namespace and everything in it. If this is the global |
|
|
* namespace, then clear it but don't free its storage unless the |
|
|
* interpreter is being torn down. |
|
|
*/ |
|
|
|
|
|
TclTeardownNamespace(nsPtr); |
|
|
|
|
|
if ((nsPtr != globalNsPtr) || (iPtr->flags & DELETED)) { |
|
|
/* |
|
|
* If this is the global namespace, then it may have residual |
|
|
* "errorInfo" and "errorCode" variables for errors that |
|
|
* occurred while it was being torn down. Try to clear the |
|
|
* variable list one last time. |
|
|
*/ |
|
|
|
|
|
TclDeleteVars((Interp *) nsPtr->interp, &nsPtr->varTable); |
|
|
|
|
|
Tcl_DeleteHashTable(&nsPtr->childTable); |
|
|
Tcl_DeleteHashTable(&nsPtr->cmdTable); |
|
|
|
|
|
/* |
|
|
* If the reference count is 0, then discard the namespace. |
|
|
* Otherwise, mark it as "dead" so that it can't be used. |
|
|
*/ |
|
|
|
|
|
if (nsPtr->refCount == 0) { |
|
|
NamespaceFree(nsPtr); |
|
|
} else { |
|
|
nsPtr->flags |= NS_DEAD; |
|
|
} |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TclTeardownNamespace -- |
|
|
* |
|
|
* Used internally to dismantle and unlink a namespace when it is |
|
|
* deleted. Divorces the namespace from its parent, and deletes all |
|
|
* commands, variables, and child namespaces. |
|
|
* |
|
|
* This is kept separate from Tcl_DeleteNamespace so that the global |
|
|
* namespace can be handled specially. Global variables like |
|
|
* "errorInfo" and "errorCode" need to remain intact while other |
|
|
* namespaces and commands are torn down, in case any errors occur. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Removes this namespace from its parent's child namespace hashtable. |
|
|
* Deletes all commands, variables and namespaces in this namespace. |
|
|
* If this is the global namespace, the "errorInfo" and "errorCode" |
|
|
* variables are left alone and deleted later. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
TclTeardownNamespace(nsPtr) |
|
|
register Namespace *nsPtr; /* Points to the namespace to be dismantled |
|
|
* and unlinked from its parent. */ |
|
|
{ |
|
|
Interp *iPtr = (Interp *) nsPtr->interp; |
|
|
register Tcl_HashEntry *entryPtr; |
|
|
Tcl_HashSearch search; |
|
|
Tcl_Namespace *childNsPtr; |
|
|
Tcl_Command cmd; |
|
|
Namespace *globalNsPtr = |
|
|
(Namespace *) Tcl_GetGlobalNamespace((Tcl_Interp *) iPtr); |
|
|
int i; |
|
|
|
|
|
/* |
|
|
* Start by destroying the namespace's variable table, |
|
|
* since variables might trigger traces. |
|
|
*/ |
|
|
|
|
|
if (nsPtr == globalNsPtr) { |
|
|
/* |
|
|
* This is the global namespace, so be careful to preserve the |
|
|
* "errorInfo" and "errorCode" variables. These might be needed |
|
|
* later on if errors occur while deleting commands. We are careful |
|
|
* to destroy and recreate the "errorInfo" and "errorCode" |
|
|
* variables, in case they had any traces on them. |
|
|
*/ |
|
|
|
|
|
char *str, *errorInfoStr, *errorCodeStr; |
|
|
|
|
|
str = Tcl_GetVar((Tcl_Interp *) iPtr, "errorInfo", TCL_GLOBAL_ONLY); |
|
|
if (str != NULL) { |
|
|
errorInfoStr = ckalloc((unsigned) (strlen(str)+1)); |
|
|
strcpy(errorInfoStr, str); |
|
|
} else { |
|
|
errorInfoStr = NULL; |
|
|
} |
|
|
|
|
|
str = Tcl_GetVar((Tcl_Interp *) iPtr, "errorCode", TCL_GLOBAL_ONLY); |
|
|
if (str != NULL) { |
|
|
errorCodeStr = ckalloc((unsigned) (strlen(str)+1)); |
|
|
strcpy(errorCodeStr, str); |
|
|
} else { |
|
|
errorCodeStr = NULL; |
|
|
} |
|
|
|
|
|
TclDeleteVars(iPtr, &nsPtr->varTable); |
|
|
Tcl_InitHashTable(&nsPtr->varTable, TCL_STRING_KEYS); |
|
|
|
|
|
if (errorInfoStr != NULL) { |
|
|
Tcl_SetVar((Tcl_Interp *) iPtr, "errorInfo", errorInfoStr, |
|
|
TCL_GLOBAL_ONLY); |
|
|
ckfree(errorInfoStr); |
|
|
} |
|
|
if (errorCodeStr != NULL) { |
|
|
Tcl_SetVar((Tcl_Interp *) iPtr, "errorCode", errorCodeStr, |
|
|
TCL_GLOBAL_ONLY); |
|
|
ckfree(errorCodeStr); |
|
|
} |
|
|
} else { |
|
|
/* |
|
|
* Variable table should be cleared but not freed! TclDeleteVars |
|
|
* frees it, so we reinitialize it afterwards. |
|
|
*/ |
|
|
|
|
|
TclDeleteVars(iPtr, &nsPtr->varTable); |
|
|
Tcl_InitHashTable(&nsPtr->varTable, TCL_STRING_KEYS); |
|
|
} |
|
|
|
|
|
/* |
|
|
* Remove the namespace from its parent's child hashtable. |
|
|
*/ |
|
|
|
|
|
if (nsPtr->parentPtr != NULL) { |
|
|
entryPtr = Tcl_FindHashEntry(&nsPtr->parentPtr->childTable, |
|
|
nsPtr->name); |
|
|
if (entryPtr != NULL) { |
|
|
Tcl_DeleteHashEntry(entryPtr); |
|
|
} |
|
|
} |
|
|
nsPtr->parentPtr = NULL; |
|
|
|
|
|
/* |
|
|
* Delete all the child namespaces. |
|
|
* |
|
|
* BE CAREFUL: When each child is deleted, it will divorce |
|
|
* itself from its parent. You can't traverse a hash table |
|
|
* properly if its elements are being deleted. We use only |
|
|
* the Tcl_FirstHashEntry function to be safe. |
|
|
*/ |
|
|
|
|
|
for (entryPtr = Tcl_FirstHashEntry(&nsPtr->childTable, &search); |
|
|
entryPtr != NULL; |
|
|
entryPtr = Tcl_FirstHashEntry(&nsPtr->childTable, &search)) { |
|
|
childNsPtr = (Tcl_Namespace *) Tcl_GetHashValue(entryPtr); |
|
|
Tcl_DeleteNamespace(childNsPtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
* Delete all commands in this namespace. Be careful when traversing the |
|
|
* hash table: when each command is deleted, it removes itself from the |
|
|
* command table. |
|
|
*/ |
|
|
|
|
|
for (entryPtr = Tcl_FirstHashEntry(&nsPtr->cmdTable, &search); |
|
|
entryPtr != NULL; |
|
|
entryPtr = Tcl_FirstHashEntry(&nsPtr->cmdTable, &search)) { |
|
|
cmd = (Tcl_Command) Tcl_GetHashValue(entryPtr); |
|
|
Tcl_DeleteCommandFromToken((Tcl_Interp *) iPtr, cmd); |
|
|
} |
|
|
Tcl_DeleteHashTable(&nsPtr->cmdTable); |
|
|
Tcl_InitHashTable(&nsPtr->cmdTable, TCL_STRING_KEYS); |
|
|
|
|
|
/* |
|
|
* Free the namespace's export pattern array. |
|
|
*/ |
|
|
|
|
|
if (nsPtr->exportArrayPtr != NULL) { |
|
|
for (i = 0; i < nsPtr->numExportPatterns; i++) { |
|
|
ckfree(nsPtr->exportArrayPtr[i]); |
|
|
} |
|
|
ckfree((char *) nsPtr->exportArrayPtr); |
|
|
nsPtr->exportArrayPtr = NULL; |
|
|
nsPtr->numExportPatterns = 0; |
|
|
nsPtr->maxExportPatterns = 0; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Free any client data associated with the namespace. |
|
|
*/ |
|
|
|
|
|
if (nsPtr->deleteProc != NULL) { |
|
|
(*nsPtr->deleteProc)(nsPtr->clientData); |
|
|
} |
|
|
nsPtr->deleteProc = NULL; |
|
|
nsPtr->clientData = NULL; |
|
|
|
|
|
/* |
|
|
* Reset the namespace's id field to ensure that this namespace won't |
|
|
* be interpreted as valid by, e.g., the cache validation code for |
|
|
* cached command references in Tcl_GetCommandFromObj. |
|
|
*/ |
|
|
|
|
|
nsPtr->nsId = 0; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* NamespaceFree -- |
|
|
* |
|
|
* Called after a namespace has been deleted, when its |
|
|
* reference count reaches 0. Frees the data structure |
|
|
* representing the namespace. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
NamespaceFree(nsPtr) |
|
|
register Namespace *nsPtr; /* Points to the namespace to free. */ |
|
|
{ |
|
|
/* |
|
|
* Most of the namespace's contents are freed when the namespace is |
|
|
* deleted by Tcl_DeleteNamespace. All that remains is to free its names |
|
|
* (for error messages), and the structure itself. |
|
|
*/ |
|
|
|
|
|
ckfree(nsPtr->name); |
|
|
ckfree(nsPtr->fullName); |
|
|
|
|
|
ckfree((char *) nsPtr); |
|
|
} |
|
|
|
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_Export -- |
|
|
* |
|
|
* Makes all the commands matching a pattern available to later be |
|
|
* imported from the namespace specified by namespacePtr (or the |
|
|
* current namespace if namespacePtr is NULL). The specified pattern is |
|
|
* appended onto the namespace's export pattern list, which is |
|
|
* optionally cleared beforehand. |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if successful, or TCL_ERROR (along with an error |
|
|
* message in the interpreter's result) if something goes wrong. |
|
|
* |
|
|
* Side effects: |
|
|
* Appends the export pattern onto the namespace's export list. |
|
|
* Optionally reset the namespace's export pattern list. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
Tcl_Export(interp, namespacePtr, pattern, resetListFirst) |
|
|
Tcl_Interp *interp; /* Current interpreter. */ |
|
|
Tcl_Namespace *namespacePtr; /* Points to the namespace from which |
|
|
* commands are to be exported. NULL for |
|
|
* the current namespace. */ |
|
|
char *pattern; /* String pattern indicating which commands |
|
|
* to export. This pattern may not include |
|
|
* any namespace qualifiers; only commands |
|
|
* in the specified namespace may be |
|
|
* exported. */ |
|
|
int resetListFirst; /* If nonzero, resets the namespace's |
|
|
* export list before appending. |
|
|
* If 0, return an error if an imported |
|
|
* cmd conflicts with an existing one. */ |
|
|
{ |
|
|
#define INIT_EXPORT_PATTERNS 5 |
|
|
Namespace *nsPtr, *exportNsPtr, *dummyPtr; |
|
|
Namespace *currNsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
|
|
char *simplePattern, *patternCpy; |
|
|
int neededElems, len, i; |
|
|
|
|
|
/* |
|
|
* If the specified namespace is NULL, use the current namespace. |
|
|
*/ |
|
|
|
|
|
if (namespacePtr == NULL) { |
|
|
nsPtr = (Namespace *) currNsPtr; |
|
|
} else { |
|
|
nsPtr = (Namespace *) namespacePtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
* If resetListFirst is true (nonzero), clear the namespace's export |
|
|
* pattern list. |
|
|
*/ |
|
|
|
|
|
if (resetListFirst) { |
|
|
if (nsPtr->exportArrayPtr != NULL) { |
|
|
for (i = 0; i < nsPtr->numExportPatterns; i++) { |
|
|
ckfree(nsPtr->exportArrayPtr[i]); |
|
|
} |
|
|
ckfree((char *) nsPtr->exportArrayPtr); |
|
|
nsPtr->exportArrayPtr = NULL; |
|
|
nsPtr->numExportPatterns = 0; |
|
|
nsPtr->maxExportPatterns = 0; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Check that the pattern doesn't have namespace qualifiers. |
|
|
*/ |
|
|
|
|
|
TclGetNamespaceForQualName(interp, pattern, nsPtr, |
|
|
/*flags*/ TCL_LEAVE_ERR_MSG, &exportNsPtr, &dummyPtr, |
|
|
&dummyPtr, &simplePattern); |
|
|
|
|
|
if ((exportNsPtr != nsPtr) || (strcmp(pattern, simplePattern) != 0)) { |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
|
|
"invalid export pattern \"", pattern, |
|
|
"\": pattern can't specify a namespace", |
|
|
(char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Make sure that we don't already have the pattern in the array |
|
|
*/ |
|
|
if (nsPtr->exportArrayPtr != NULL) { |
|
|
for (i = 0; i < nsPtr->numExportPatterns; i++) { |
|
|
if (strcmp(pattern, nsPtr->exportArrayPtr[i]) == 0) { |
|
|
/* |
|
|
* The pattern already exists in the list |
|
|
*/ |
|
|
return TCL_OK; |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Make sure there is room in the namespace's pattern array for the |
|
|
* new pattern. |
|
|
*/ |
|
|
|
|
|
neededElems = nsPtr->numExportPatterns + 1; |
|
|
if (nsPtr->exportArrayPtr == NULL) { |
|
|
nsPtr->exportArrayPtr = (char **) |
|
|
ckalloc((unsigned) (INIT_EXPORT_PATTERNS * sizeof(char *))); |
|
|
nsPtr->numExportPatterns = 0; |
|
|
nsPtr->maxExportPatterns = INIT_EXPORT_PATTERNS; |
|
|
} else if (neededElems > nsPtr->maxExportPatterns) { |
|
|
int numNewElems = 2 * nsPtr->maxExportPatterns; |
|
|
size_t currBytes = nsPtr->numExportPatterns * sizeof(char *); |
|
|
size_t newBytes = numNewElems * sizeof(char *); |
|
|
char **newPtr = (char **) ckalloc((unsigned) newBytes); |
|
|
|
|
|
memcpy((VOID *) newPtr, (VOID *) nsPtr->exportArrayPtr, |
|
|
currBytes); |
|
|
ckfree((char *) nsPtr->exportArrayPtr); |
|
|
nsPtr->exportArrayPtr = (char **) newPtr; |
|
|
nsPtr->maxExportPatterns = numNewElems; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Add the pattern to the namespace's array of export patterns. |
|
|
*/ |
|
|
|
|
|
len = strlen(pattern); |
|
|
patternCpy = (char *) ckalloc((unsigned) (len + 1)); |
|
|
strcpy(patternCpy, pattern); |
|
|
|
|
|
nsPtr->exportArrayPtr[nsPtr->numExportPatterns] = patternCpy; |
|
|
nsPtr->numExportPatterns++; |
|
|
return TCL_OK; |
|
|
#undef INIT_EXPORT_PATTERNS |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_AppendExportList -- |
|
|
* |
|
|
* Appends onto the argument object the list of export patterns for the |
|
|
* specified namespace. |
|
|
* |
|
|
* Results: |
|
|
* The return value is normally TCL_OK; in this case the object |
|
|
* referenced by objPtr has each export pattern appended to it. If an |
|
|
* error occurs, TCL_ERROR is returned and the interpreter's result |
|
|
* holds an error message. |
|
|
* |
|
|
* Side effects: |
|
|
* If necessary, the object referenced by objPtr is converted into |
|
|
* a list object. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
Tcl_AppendExportList(interp, namespacePtr, objPtr) |
|
|
Tcl_Interp *interp; /* Interpreter used for error reporting. */ |
|
|
Tcl_Namespace *namespacePtr; /* Points to the namespace whose export |
|
|
* pattern list is appended onto objPtr. |
|
|
* NULL for the current namespace. */ |
|
|
Tcl_Obj *objPtr; /* Points to the Tcl object onto which the |
|
|
* export pattern list is appended. */ |
|
|
{ |
|
|
Namespace *nsPtr; |
|
|
int i, result; |
|
|
|
|
|
/* |
|
|
* If the specified namespace is NULL, use the current namespace. |
|
|
*/ |
|
|
|
|
|
if (namespacePtr == NULL) { |
|
|
nsPtr = (Namespace *) (Namespace *) Tcl_GetCurrentNamespace(interp); |
|
|
} else { |
|
|
nsPtr = (Namespace *) namespacePtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Append the export pattern list onto objPtr. |
|
|
*/ |
|
|
|
|
|
for (i = 0; i < nsPtr->numExportPatterns; i++) { |
|
|
result = Tcl_ListObjAppendElement(interp, objPtr, |
|
|
Tcl_NewStringObj(nsPtr->exportArrayPtr[i], -1)); |
|
|
if (result != TCL_OK) { |
|
|
return result; |
|
|
} |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_Import -- |
|
|
* |
|
|
* Imports all of the commands matching a pattern into the namespace |
|
|
* specified by namespacePtr (or the current namespace if contextNsPtr |
|
|
* is NULL). This is done by creating a new command (the "imported |
|
|
* command") that points to the real command in its original namespace. |
|
|
* |
|
|
* If matching commands are on the autoload path but haven't been |
|
|
* loaded yet, this command forces them to be loaded, then creates |
|
|
* the links to them. |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if successful, or TCL_ERROR (along with an error |
|
|
* message in the interpreter's result) if something goes wrong. |
|
|
* |
|
|
* Side effects: |
|
|
* Creates new commands in the importing namespace. These indirect |
|
|
* calls back to the real command and are deleted if the real commands |
|
|
* are deleted. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
Tcl_Import(interp, namespacePtr, pattern, allowOverwrite) |
|
|
Tcl_Interp *interp; /* Current interpreter. */ |
|
|
Tcl_Namespace *namespacePtr; /* Points to the namespace into which the |
|
|
* commands are to be imported. NULL for |
|
|
* the current namespace. */ |
|
|
char *pattern; /* String pattern indicating which commands |
|
|
* to import. This pattern should be |
|
|
* qualified by the name of the namespace |
|
|
* from which to import the command(s). */ |
|
|
int allowOverwrite; /* If nonzero, allow existing commands to |
|
|
* be overwritten by imported commands. |
|
|
* If 0, return an error if an imported |
|
|
* cmd conflicts with an existing one. */ |
|
|
{ |
|
|
Interp *iPtr = (Interp *) interp; |
|
|
Namespace *nsPtr, *importNsPtr, *dummyPtr; |
|
|
Namespace *currNsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
|
|
char *simplePattern, *cmdName; |
|
|
register Tcl_HashEntry *hPtr; |
|
|
Tcl_HashSearch search; |
|
|
Command *cmdPtr, *realCmdPtr; |
|
|
ImportRef *refPtr; |
|
|
Tcl_Command autoCmd, importedCmd; |
|
|
ImportedCmdData *dataPtr; |
|
|
int wasExported, i, result; |
|
|
|
|
|
/* |
|
|
* If the specified namespace is NULL, use the current namespace. |
|
|
*/ |
|
|
|
|
|
if (namespacePtr == NULL) { |
|
|
nsPtr = (Namespace *) currNsPtr; |
|
|
} else { |
|
|
nsPtr = (Namespace *) namespacePtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
* First, invoke the "auto_import" command with the pattern |
|
|
* being imported. This command is part of the Tcl library. |
|
|
* It looks for imported commands in autoloaded libraries and |
|
|
* loads them in. That way, they will be found when we try |
|
|
* to create links below. |
|
|
*/ |
|
|
|
|
|
autoCmd = Tcl_FindCommand(interp, "auto_import", |
|
|
(Tcl_Namespace *) NULL, /*flags*/ TCL_GLOBAL_ONLY); |
|
|
|
|
|
if (autoCmd != NULL) { |
|
|
Tcl_Obj *objv[2]; |
|
|
|
|
|
objv[0] = Tcl_NewStringObj("auto_import", -1); |
|
|
Tcl_IncrRefCount(objv[0]); |
|
|
objv[1] = Tcl_NewStringObj(pattern, -1); |
|
|
Tcl_IncrRefCount(objv[1]); |
|
|
|
|
|
cmdPtr = (Command *) autoCmd; |
|
|
result = (*cmdPtr->objProc)(cmdPtr->objClientData, interp, |
|
|
2, objv); |
|
|
|
|
|
Tcl_DecrRefCount(objv[0]); |
|
|
Tcl_DecrRefCount(objv[1]); |
|
|
|
|
|
if (result != TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
Tcl_ResetResult(interp); |
|
|
} |
|
|
|
|
|
/* |
|
|
* From the pattern, find the namespace from which we are importing |
|
|
* and get the simple pattern (no namespace qualifiers or ::'s) at |
|
|
* the end. |
|
|
*/ |
|
|
|
|
|
if (strlen(pattern) == 0) { |
|
|
Tcl_SetStringObj(Tcl_GetObjResult(interp), |
|
|
"empty import pattern", -1); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
TclGetNamespaceForQualName(interp, pattern, nsPtr, |
|
|
/*flags*/ TCL_LEAVE_ERR_MSG, &importNsPtr, &dummyPtr, |
|
|
&dummyPtr, &simplePattern); |
|
|
|
|
|
if (importNsPtr == NULL) { |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
|
|
"unknown namespace in import pattern \"", |
|
|
pattern, "\"", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (importNsPtr == nsPtr) { |
|
|
if (pattern == simplePattern) { |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
|
|
"no namespace specified in import pattern \"", pattern, |
|
|
"\"", (char *) NULL); |
|
|
} else { |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
|
|
"import pattern \"", pattern, |
|
|
"\" tries to import from namespace \"", |
|
|
importNsPtr->name, "\" into itself", (char *) NULL); |
|
|
} |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Scan through the command table in the source namespace and look for |
|
|
* exported commands that match the string pattern. Create an "imported |
|
|
* command" in the current namespace for each imported command; these |
|
|
* commands redirect their invocations to the "real" command. |
|
|
*/ |
|
|
|
|
|
for (hPtr = Tcl_FirstHashEntry(&importNsPtr->cmdTable, &search); |
|
|
(hPtr != NULL); |
|
|
hPtr = Tcl_NextHashEntry(&search)) { |
|
|
cmdName = Tcl_GetHashKey(&importNsPtr->cmdTable, hPtr); |
|
|
if (Tcl_StringMatch(cmdName, simplePattern)) { |
|
|
/* |
|
|
* The command cmdName in the source namespace matches the |
|
|
* pattern. Check whether it was exported. If it wasn't, |
|
|
* we ignore it. |
|
|
*/ |
|
|
|
|
|
wasExported = 0; |
|
|
for (i = 0; i < importNsPtr->numExportPatterns; i++) { |
|
|
if (Tcl_StringMatch(cmdName, |
|
|
importNsPtr->exportArrayPtr[i])) { |
|
|
wasExported = 1; |
|
|
break; |
|
|
} |
|
|
} |
|
|
if (!wasExported) { |
|
|
continue; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Unless there is a name clash, create an imported command |
|
|
* in the current namespace that refers to cmdPtr. |
|
|
*/ |
|
|
|
|
|
if ((Tcl_FindHashEntry(&nsPtr->cmdTable, cmdName) == NULL) |
|
|
|| allowOverwrite) { |
|
|
/* |
|
|
* Create the imported command and its client data. |
|
|
* To create the new command in the current namespace, |
|
|
* generate a fully qualified name for it. |
|
|
*/ |
|
|
|
|
|
Tcl_DString ds; |
|
|
|
|
|
Tcl_DStringInit(&ds); |
|
|
Tcl_DStringAppend(&ds, nsPtr->fullName, -1); |
|
|
if (nsPtr != iPtr->globalNsPtr) { |
|
|
Tcl_DStringAppend(&ds, "::", 2); |
|
|
} |
|
|
Tcl_DStringAppend(&ds, cmdName, -1); |
|
|
|
|
|
/* |
|
|
* Check whether creating the new imported command in the |
|
|
* current namespace would create a cycle of imported->real |
|
|
* command references that also would destroy an existing |
|
|
* "real" command already in the current namespace. |
|
|
*/ |
|
|
|
|
|
cmdPtr = (Command *) Tcl_GetHashValue(hPtr); |
|
|
if (cmdPtr->deleteProc == DeleteImportedCmd) { |
|
|
realCmdPtr = (Command *) TclGetOriginalCommand( |
|
|
(Tcl_Command) cmdPtr); |
|
|
if ((realCmdPtr != NULL) |
|
|
&& (realCmdPtr->nsPtr == currNsPtr) |
|
|
&& (Tcl_FindHashEntry(&currNsPtr->cmdTable, |
|
|
cmdName) != NULL)) { |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
|
|
"import pattern \"", pattern, |
|
|
"\" would create a loop containing command \"", |
|
|
Tcl_DStringValue(&ds), "\"", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
|
|
|
dataPtr = (ImportedCmdData *) |
|
|
ckalloc(sizeof(ImportedCmdData)); |
|
|
importedCmd = Tcl_CreateObjCommand(interp, |
|
|
Tcl_DStringValue(&ds), InvokeImportedCmd, |
|
|
(ClientData) dataPtr, DeleteImportedCmd); |
|
|
dataPtr->realCmdPtr = cmdPtr; |
|
|
dataPtr->selfPtr = (Command *) importedCmd; |
|
|
dataPtr->selfPtr->compileProc = cmdPtr->compileProc; |
|
|
|
|
|
/* |
|
|
* Create an ImportRef structure describing this new import |
|
|
* command and add it to the import ref list in the "real" |
|
|
* command. |
|
|
*/ |
|
|
|
|
|
refPtr = (ImportRef *) ckalloc(sizeof(ImportRef)); |
|
|
refPtr->importedCmdPtr = (Command *) importedCmd; |
|
|
refPtr->nextPtr = cmdPtr->importRefPtr; |
|
|
cmdPtr->importRefPtr = refPtr; |
|
|
} else { |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
|
|
"can't import command \"", cmdName, |
|
|
"\": already exists", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_ForgetImport -- |
|
|
* |
|
|
* Deletes previously imported commands. Given a pattern that may |
|
|
* include the name of an exporting namespace, this procedure first |
|
|
* finds all matching exported commands. It then looks in the namespace |
|
|
* specified by namespacePtr for any corresponding previously imported |
|
|
* commands, which it deletes. If namespacePtr is NULL, commands are |
|
|
* deleted from the current namespace. |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if successful. If there is an error, returns |
|
|
* TCL_ERROR and puts an error message in the interpreter's result |
|
|
* object. |
|
|
* |
|
|
* Side effects: |
|
|
* May delete commands. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
Tcl_ForgetImport(interp, namespacePtr, pattern) |
|
|
Tcl_Interp *interp; /* Current interpreter. */ |
|
|
Tcl_Namespace *namespacePtr; /* Points to the namespace from which |
|
|
* previously imported commands should be |
|
|
* removed. NULL for current namespace. */ |
|
|
char *pattern; /* String pattern indicating which imported |
|
|
* commands to remove. This pattern should |
|
|
* be qualified by the name of the |
|
|
* namespace from which the command(s) were |
|
|
* imported. */ |
|
|
{ |
|
|
Namespace *nsPtr, *importNsPtr, *dummyPtr, *actualCtxPtr; |
|
|
char *simplePattern, *cmdName; |
|
|
register Tcl_HashEntry *hPtr; |
|
|
Tcl_HashSearch search; |
|
|
Command *cmdPtr; |
|
|
|
|
|
/* |
|
|
* If the specified namespace is NULL, use the current namespace. |
|
|
*/ |
|
|
|
|
|
if (namespacePtr == NULL) { |
|
|
nsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
|
|
} else { |
|
|
nsPtr = (Namespace *) namespacePtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
* From the pattern, find the namespace from which we are importing |
|
|
* and get the simple pattern (no namespace qualifiers or ::'s) at |
|
|
* the end. |
|
|
*/ |
|
|
|
|
|
TclGetNamespaceForQualName(interp, pattern, nsPtr, |
|
|
/*flags*/ TCL_LEAVE_ERR_MSG, &importNsPtr, &dummyPtr, |
|
|
&actualCtxPtr, &simplePattern); |
|
|
|
|
|
if (importNsPtr == NULL) { |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
|
|
"unknown namespace in namespace forget pattern \"", |
|
|
pattern, "\"", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Scan through the command table in the source namespace and look for |
|
|
* exported commands that match the string pattern. If the current |
|
|
* namespace has an imported command that refers to one of those real |
|
|
* commands, delete it. |
|
|
*/ |
|
|
|
|
|
for (hPtr = Tcl_FirstHashEntry(&importNsPtr->cmdTable, &search); |
|
|
(hPtr != NULL); |
|
|
hPtr = Tcl_NextHashEntry(&search)) { |
|
|
cmdName = Tcl_GetHashKey(&importNsPtr->cmdTable, hPtr); |
|
|
if (Tcl_StringMatch(cmdName, simplePattern)) { |
|
|
hPtr = Tcl_FindHashEntry(&nsPtr->cmdTable, cmdName); |
|
|
if (hPtr != NULL) { /* cmd of same name in current namespace */ |
|
|
cmdPtr = (Command *) Tcl_GetHashValue(hPtr); |
|
|
if (cmdPtr->deleteProc == DeleteImportedCmd) { |
|
|
Tcl_DeleteCommandFromToken(interp, (Tcl_Command) cmdPtr); |
|
|
} |
|
|
} |
|
|
} |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TclGetOriginalCommand -- |
|
|
* |
|
|
* An imported command is created in an namespace when a "real" command |
|
|
* is imported from another namespace. If the specified command is an |
|
|
* imported command, this procedure returns the original command it |
|
|
* refers to. |
|
|
* |
|
|
* Results: |
|
|
* If the command was imported into a sequence of namespaces a, b,...,n |
|
|
* where each successive namespace just imports the command from the |
|
|
* previous namespace, this procedure returns the Tcl_Command token in |
|
|
* the first namespace, a. Otherwise, if the specified command is not |
|
|
* an imported command, the procedure returns NULL. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
Tcl_Command |
|
|
TclGetOriginalCommand(command) |
|
|
Tcl_Command command; /* The imported command for which the |
|
|
* original command should be returned. */ |
|
|
{ |
|
|
register Command *cmdPtr = (Command *) command; |
|
|
ImportedCmdData *dataPtr; |
|
|
|
|
|
if (cmdPtr->deleteProc != DeleteImportedCmd) { |
|
|
return (Tcl_Command) NULL; |
|
|
} |
|
|
|
|
|
while (cmdPtr->deleteProc == DeleteImportedCmd) { |
|
|
dataPtr = (ImportedCmdData *) cmdPtr->objClientData; |
|
|
cmdPtr = dataPtr->realCmdPtr; |
|
|
} |
|
|
return (Tcl_Command) cmdPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* InvokeImportedCmd -- |
|
|
* |
|
|
* Invoked by Tcl whenever the user calls an imported command that |
|
|
* was created by Tcl_Import. Finds the "real" command (in another |
|
|
* namespace), and passes control to it. |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
|
|
* |
|
|
* Side effects: |
|
|
* Returns a result in the interpreter's result object. If anything |
|
|
* goes wrong, the result object is set to an error message. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
InvokeImportedCmd(clientData, interp, objc, objv) |
|
|
ClientData clientData; /* Points to the imported command's |
|
|
* ImportedCmdData structure. */ |
|
|
Tcl_Interp *interp; /* Current interpreter. */ |
|
|
int objc; /* Number of arguments. */ |
|
|
Tcl_Obj *CONST objv[]; /* The argument objects. */ |
|
|
{ |
|
|
register ImportedCmdData *dataPtr = (ImportedCmdData *) clientData; |
|
|
register Command *realCmdPtr = dataPtr->realCmdPtr; |
|
|
|
|
|
return (*realCmdPtr->objProc)(realCmdPtr->objClientData, interp, |
|
|
objc, objv); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* DeleteImportedCmd -- |
|
|
* |
|
|
* Invoked by Tcl whenever an imported command is deleted. The "real" |
|
|
* command keeps a list of all the imported commands that refer to it, |
|
|
* so those imported commands can be deleted when the real command is |
|
|
* deleted. This procedure removes the imported command reference from |
|
|
* the real command's list, and frees up the memory associated with |
|
|
* the imported command. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Removes the imported command from the real command's import list. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
DeleteImportedCmd(clientData) |
|
|
ClientData clientData; /* Points to the imported command's |
|
|
* ImportedCmdData structure. */ |
|
|
{ |
|
|
ImportedCmdData *dataPtr = (ImportedCmdData *) clientData; |
|
|
Command *realCmdPtr = dataPtr->realCmdPtr; |
|
|
Command *selfPtr = dataPtr->selfPtr; |
|
|
register ImportRef *refPtr, *prevPtr; |
|
|
|
|
|
prevPtr = NULL; |
|
|
for (refPtr = realCmdPtr->importRefPtr; refPtr != NULL; |
|
|
refPtr = refPtr->nextPtr) { |
|
|
if (refPtr->importedCmdPtr == selfPtr) { |
|
|
/* |
|
|
* Remove *refPtr from real command's list of imported commands |
|
|
* that refer to it. |
|
|
*/ |
|
|
|
|
|
if (prevPtr == NULL) { /* refPtr is first in list */ |
|
|
realCmdPtr->importRefPtr = refPtr->nextPtr; |
|
|
} else { |
|
|
prevPtr->nextPtr = refPtr->nextPtr; |
|
|
} |
|
|
ckfree((char *) refPtr); |
|
|
ckfree((char *) dataPtr); |
|
|
return; |
|
|
} |
|
|
prevPtr = refPtr; |
|
|
} |
|
|
|
|
|
panic("DeleteImportedCmd: did not find cmd in real cmd's list of import references"); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TclGetNamespaceForQualName -- |
|
|
* |
|
|
* Given a qualified name specifying a command, variable, or namespace, |
|
|
* and a namespace in which to resolve the name, this procedure returns |
|
|
* a pointer to the namespace that contains the item. A qualified name |
|
|
* consists of the "simple" name of an item qualified by the names of |
|
|
* an arbitrary number of containing namespace separated by "::"s. If |
|
|
* the qualified name starts with "::", it is interpreted absolutely |
|
|
* from the global namespace. Otherwise, it is interpreted relative to |
|
|
* the namespace specified by cxtNsPtr if it is non-NULL. If cxtNsPtr |
|
|
* is NULL, the name is interpreted relative to the current namespace. |
|
|
* |
|
|
* A relative name like "foo::bar::x" can be found starting in either |
|
|
* the current namespace or in the global namespace. So each search |
|
|
* usually follows two tracks, and two possible namespaces are |
|
|
* returned. If the procedure sets either *nsPtrPtr or *altNsPtrPtr to |
|
|
* NULL, then that path failed. |
|
|
* |
|
|
* If "flags" contains TCL_GLOBAL_ONLY, the relative qualified name is |
|
|
* sought only in the global :: namespace. The alternate search |
|
|
* (also) starting from the global namespace is ignored and |
|
|
* *altNsPtrPtr is set NULL. |
|
|
* |
|
|
* If "flags" contains TCL_NAMESPACE_ONLY, the relative qualified |
|
|
* name is sought only in the namespace specified by cxtNsPtr. The |
|
|
* alternate search starting from the global namespace is ignored and |
|
|
* *altNsPtrPtr is set NULL. If both TCL_GLOBAL_ONLY and |
|
|
* TCL_NAMESPACE_ONLY are specified, TCL_GLOBAL_ONLY is ignored and |
|
|
* the search starts from the namespace specified by cxtNsPtr. |
|
|
* |
|
|
* If "flags" contains CREATE_NS_IF_UNKNOWN, all namespace |
|
|
* components of the qualified name that cannot be found are |
|
|
* automatically created within their specified parent. This makes sure |
|
|
* that functions like Tcl_CreateCommand always succeed. There is no |
|
|
* alternate search path, so *altNsPtrPtr is set NULL. |
|
|
* |
|
|
* If "flags" contains FIND_ONLY_NS, the qualified name is treated as a |
|
|
* reference to a namespace, and the entire qualified name is |
|
|
* followed. If the name is relative, the namespace is looked up only |
|
|
* in the current namespace. A pointer to the namespace is stored in |
|
|
* *nsPtrPtr and NULL is stored in *simpleNamePtr. Otherwise, if |
|
|
* FIND_ONLY_NS is not specified, only the leading components are |
|
|
* treated as namespace names, and a pointer to the simple name of the |
|
|
* final component is stored in *simpleNamePtr. |
|
|
* |
|
|
* Results: |
|
|
* It sets *nsPtrPtr and *altNsPtrPtr to point to the two possible |
|
|
* namespaces which represent the last (containing) namespace in the |
|
|
* qualified name. If the procedure sets either *nsPtrPtr or *altNsPtrPtr |
|
|
* to NULL, then the search along that path failed. The procedure also |
|
|
* stores a pointer to the simple name of the final component in |
|
|
* *simpleNamePtr. If the qualified name is "::" or was treated as a |
|
|
* namespace reference (FIND_ONLY_NS), the procedure stores a pointer |
|
|
* to the namespace in *nsPtrPtr, NULL in *altNsPtrPtr, and sets |
|
|
* *simpleNamePtr to point to an empty string. |
|
|
* |
|
|
* If there is an error, this procedure returns TCL_ERROR. If "flags" |
|
|
* contains TCL_LEAVE_ERR_MSG, an error message is returned in the |
|
|
* interpreter's result object. Otherwise, the interpreter's result |
|
|
* object is left unchanged. |
|
|
* |
|
|
* *actualCxtPtrPtr is set to the actual context namespace. It is |
|
|
* set to the input context namespace pointer in cxtNsPtr. If cxtNsPtr |
|
|
* is NULL, it is set to the current namespace context. |
|
|
* |
|
|
* For backwards compatibility with the TclPro byte code loader, |
|
|
* this function always returns TCL_OK. |
|
|
* |
|
|
* Side effects: |
|
|
* If "flags" contains CREATE_NS_IF_UNKNOWN, new namespaces may be |
|
|
* created. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
TclGetNamespaceForQualName(interp, qualName, cxtNsPtr, flags, |
|
|
nsPtrPtr, altNsPtrPtr, actualCxtPtrPtr, simpleNamePtr) |
|
|
Tcl_Interp *interp; /* Interpreter in which to find the |
|
|
* namespace containing qualName. */ |
|
|
register char *qualName; /* A namespace-qualified name of an |
|
|
* command, variable, or namespace. */ |
|
|
Namespace *cxtNsPtr; /* The namespace in which to start the |
|
|
* search for qualName's namespace. If NULL |
|
|
* start from the current namespace. |
|
|
* Ignored if TCL_GLOBAL_ONLY or |
|
|
* TCL_NAMESPACE_ONLY are set. */ |
|
|
int flags; /* Flags controlling the search: an OR'd |
|
|
* combination of TCL_GLOBAL_ONLY, |
|
|
* TCL_NAMESPACE_ONLY, |
|
|
* CREATE_NS_IF_UNKNOWN, and |
|
|
* FIND_ONLY_NS. */ |
|
|
Namespace **nsPtrPtr; /* Address where procedure stores a pointer |
|
|
* to containing namespace if qualName is |
|
|
* found starting from *cxtNsPtr or, if |
|
|
* TCL_GLOBAL_ONLY is set, if qualName is |
|
|
* found in the global :: namespace. NULL |
|
|
* is stored otherwise. */ |
|
|
Namespace **altNsPtrPtr; /* Address where procedure stores a pointer |
|
|
* to containing namespace if qualName is |
|
|
* found starting from the global :: |
|
|
* namespace. NULL is stored if qualName |
|
|
* isn't found starting from :: or if the |
|
|
* TCL_GLOBAL_ONLY, TCL_NAMESPACE_ONLY, |
|
|
* CREATE_NS_IF_UNKNOWN, FIND_ONLY_NS flag |
|
|
* is set. */ |
|
|
Namespace **actualCxtPtrPtr; /* Address where procedure stores a pointer |
|
|
* to the actual namespace from which the |
|
|
* search started. This is either cxtNsPtr, |
|
|
* the :: namespace if TCL_GLOBAL_ONLY was |
|
|
* specified, or the current namespace if |
|
|
* cxtNsPtr was NULL. */ |
|
|
char **simpleNamePtr; /* Address where procedure stores the |
|
|
* simple name at end of the qualName, or |
|
|
* NULL if qualName is "::" or the flag |
|
|
* FIND_ONLY_NS was specified. */ |
|
|
{ |
|
|
Interp *iPtr = (Interp *) interp; |
|
|
Namespace *nsPtr = cxtNsPtr; |
|
|
Namespace *altNsPtr; |
|
|
Namespace *globalNsPtr = iPtr->globalNsPtr; |
|
|
register char *start, *end; |
|
|
char *nsName; |
|
|
Tcl_HashEntry *entryPtr; |
|
|
Tcl_DString buffer; |
|
|
int len; |
|
|
|
|
|
/* |
|
|
* Determine the context namespace nsPtr in which to start the primary |
|
|
* search. If TCL_NAMESPACE_ONLY or FIND_ONLY_NS was specified, search |
|
|
* from the current namespace. If the qualName name starts with a "::" |
|
|
* or TCL_GLOBAL_ONLY was specified, search from the global |
|
|
* namespace. Otherwise, use the given namespace given in cxtNsPtr, or |
|
|
* if that is NULL, use the current namespace context. Note that we |
|
|
* always treat two or more adjacent ":"s as a namespace separator. |
|
|
*/ |
|
|
|
|
|
if (flags & (TCL_NAMESPACE_ONLY | FIND_ONLY_NS)) { |
|
|
nsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
|
|
} else if (flags & TCL_GLOBAL_ONLY) { |
|
|
nsPtr = globalNsPtr; |
|
|
} else if (nsPtr == NULL) { |
|
|
if (iPtr->varFramePtr != NULL) { |
|
|
nsPtr = iPtr->varFramePtr->nsPtr; |
|
|
} else { |
|
|
nsPtr = iPtr->globalNsPtr; |
|
|
} |
|
|
} |
|
|
|
|
|
start = qualName; /* pts to start of qualifying namespace */ |
|
|
if ((*qualName == ':') && (*(qualName+1) == ':')) { |
|
|
start = qualName+2; /* skip over the initial :: */ |
|
|
while (*start == ':') { |
|
|
start++; /* skip over a subsequent : */ |
|
|
} |
|
|
nsPtr = globalNsPtr; |
|
|
if (*start == '\0') { /* qualName is just two or more ":"s */ |
|
|
*nsPtrPtr = globalNsPtr; |
|
|
*altNsPtrPtr = NULL; |
|
|
*actualCxtPtrPtr = globalNsPtr; |
|
|
*simpleNamePtr = start; /* points to empty string */ |
|
|
return TCL_OK; |
|
|
} |
|
|
} |
|
|
*actualCxtPtrPtr = nsPtr; |
|
|
|
|
|
/* |
|
|
* Start an alternate search path starting with the global namespace. |
|
|
* However, if the starting context is the global namespace, or if the |
|
|
* flag is set to search only the namespace *cxtNsPtr, ignore the |
|
|
* alternate search path. |
|
|
*/ |
|
|
|
|
|
altNsPtr = globalNsPtr; |
|
|
if ((nsPtr == globalNsPtr) |
|
|
|| (flags & (TCL_NAMESPACE_ONLY | FIND_ONLY_NS))) { |
|
|
altNsPtr = NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Loop to resolve each namespace qualifier in qualName. |
|
|
*/ |
|
|
|
|
|
Tcl_DStringInit(&buffer); |
|
|
end = start; |
|
|
while (*start != '\0') { |
|
|
/* |
|
|
* Find the next namespace qualifier (i.e., a name ending in "::") |
|
|
* or the end of the qualified name (i.e., a name ending in "\0"). |
|
|
* Set len to the number of characters, starting from start, |
|
|
* in the name; set end to point after the "::"s or at the "\0". |
|
|
*/ |
|
|
|
|
|
len = 0; |
|
|
for (end = start; *end != '\0'; end++) { |
|
|
if ((*end == ':') && (*(end+1) == ':')) { |
|
|
end += 2; /* skip over the initial :: */ |
|
|
while (*end == ':') { |
|
|
end++; /* skip over the subsequent : */ |
|
|
} |
|
|
break; /* exit for loop; end is after ::'s */ |
|
|
} |
|
|
len++; |
|
|
} |
|
|
|
|
|
if ((*end == '\0') |
|
|
&& !((end-start >= 2) && (*(end-1) == ':') && (*(end-2) == ':'))) { |
|
|
/* |
|
|
* qualName ended with a simple name at start. If FIND_ONLY_NS |
|
|
* was specified, look this up as a namespace. Otherwise, |
|
|
* start is the name of a cmd or var and we are done. |
|
|
*/ |
|
|
|
|
|
if (flags & FIND_ONLY_NS) { |
|
|
nsName = start; |
|
|
} else { |
|
|
*nsPtrPtr = nsPtr; |
|
|
*altNsPtrPtr = altNsPtr; |
|
|
*simpleNamePtr = start; |
|
|
Tcl_DStringFree(&buffer); |
|
|
return TCL_OK; |
|
|
} |
|
|
} else { |
|
|
/* |
|
|
* start points to the beginning of a namespace qualifier ending |
|
|
* in "::". end points to the start of a name in that namespace |
|
|
* that might be empty. Copy the namespace qualifier to a |
|
|
* buffer so it can be null terminated. We can't modify the |
|
|
* incoming qualName since it may be a string constant. |
|
|
*/ |
|
|
|
|
|
Tcl_DStringSetLength(&buffer, 0); |
|
|
Tcl_DStringAppend(&buffer, start, len); |
|
|
nsName = Tcl_DStringValue(&buffer); |
|
|
} |
|
|
|
|
|
/* |
|
|
* Look up the namespace qualifier nsName in the current namespace |
|
|
* context. If it isn't found but CREATE_NS_IF_UNKNOWN is set, |
|
|
* create that qualifying namespace. This is needed for procedures |
|
|
* like Tcl_CreateCommand that cannot fail. |
|
|
*/ |
|
|
|
|
|
if (nsPtr != NULL) { |
|
|
entryPtr = Tcl_FindHashEntry(&nsPtr->childTable, nsName); |
|
|
if (entryPtr != NULL) { |
|
|
nsPtr = (Namespace *) Tcl_GetHashValue(entryPtr); |
|
|
} else if (flags & CREATE_NS_IF_UNKNOWN) { |
|
|
Tcl_CallFrame frame; |
|
|
|
|
|
(void) Tcl_PushCallFrame(interp, &frame, |
|
|
(Tcl_Namespace *) nsPtr, /*isProcCallFrame*/ 0); |
|
|
|
|
|
nsPtr = (Namespace *) Tcl_CreateNamespace(interp, nsName, |
|
|
(ClientData) NULL, (Tcl_NamespaceDeleteProc *) NULL); |
|
|
Tcl_PopCallFrame(interp); |
|
|
|
|
|
if (nsPtr == NULL) { |
|
|
panic("Could not create namespace '%s'", nsName); |
|
|
} |
|
|
} else { /* namespace not found and wasn't created */ |
|
|
nsPtr = NULL; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Look up the namespace qualifier in the alternate search path too. |
|
|
*/ |
|
|
|
|
|
if (altNsPtr != NULL) { |
|
|
entryPtr = Tcl_FindHashEntry(&altNsPtr->childTable, nsName); |
|
|
if (entryPtr != NULL) { |
|
|
altNsPtr = (Namespace *) Tcl_GetHashValue(entryPtr); |
|
|
} else { |
|
|
altNsPtr = NULL; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* If both search paths have failed, return NULL results. |
|
|
*/ |
|
|
|
|
|
if ((nsPtr == NULL) && (altNsPtr == NULL)) { |
|
|
*nsPtrPtr = NULL; |
|
|
*altNsPtrPtr = NULL; |
|
|
*simpleNamePtr = NULL; |
|
|
Tcl_DStringFree(&buffer); |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
start = end; |
|
|
} |
|
|
|
|
|
/* |
|
|
* We ignore trailing "::"s in a namespace name, but in a command or |
|
|
* variable name, trailing "::"s refer to the cmd or var named {}. |
|
|
*/ |
|
|
|
|
|
if ((flags & FIND_ONLY_NS) |
|
|
|| ((end > start ) && (*(end-1) != ':'))) { |
|
|
*simpleNamePtr = NULL; /* found namespace name */ |
|
|
} else { |
|
|
*simpleNamePtr = end; /* found cmd/var: points to empty string */ |
|
|
} |
|
|
|
|
|
/* |
|
|
* As a special case, if we are looking for a namespace and qualName |
|
|
* is "" and the current active namespace (nsPtr) is not the global |
|
|
* namespace, return NULL (no namespace was found). This is because |
|
|
* namespaces can not have empty names except for the global namespace. |
|
|
*/ |
|
|
|
|
|
if ((flags & FIND_ONLY_NS) && (*qualName == '\0') |
|
|
&& (nsPtr != globalNsPtr)) { |
|
|
nsPtr = NULL; |
|
|
} |
|
|
|
|
|
*nsPtrPtr = nsPtr; |
|
|
*altNsPtrPtr = altNsPtr; |
|
|
Tcl_DStringFree(&buffer); |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_FindNamespace -- |
|
|
* |
|
|
* Searches for a namespace. |
|
|
* |
|
|
* Results: |
|
|
* Returns a pointer to the namespace if it is found. Otherwise, |
|
|
* returns NULL and leaves an error message in the interpreter's |
|
|
* result object if "flags" contains TCL_LEAVE_ERR_MSG. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
Tcl_Namespace * |
|
|
Tcl_FindNamespace(interp, name, contextNsPtr, flags) |
|
|
Tcl_Interp *interp; /* The interpreter in which to find the |
|
|
* namespace. */ |
|
|
char *name; /* Namespace name. If it starts with "::", |
|
|
* will be looked up in global namespace. |
|
|
* Else, looked up first in contextNsPtr |
|
|
* (current namespace if contextNsPtr is |
|
|
* NULL), then in global namespace. */ |
|
|
Tcl_Namespace *contextNsPtr; /* Ignored if TCL_GLOBAL_ONLY flag is set |
|
|
* or if the name starts with "::". |
|
|
* Otherwise, points to namespace in which |
|
|
* to resolve name; if NULL, look up name |
|
|
* in the current namespace. */ |
|
|
register int flags; /* Flags controlling namespace lookup: an |
|
|
* OR'd combination of TCL_GLOBAL_ONLY and |
|
|
* TCL_LEAVE_ERR_MSG flags. */ |
|
|
{ |
|
|
Namespace *nsPtr, *dummy1Ptr, *dummy2Ptr; |
|
|
char *dummy; |
|
|
|
|
|
/* |
|
|
* Find the namespace(s) that contain the specified namespace name. |
|
|
* Add the FIND_ONLY_NS flag to resolve the name all the way down |
|
|
* to its last component, a namespace. |
|
|
*/ |
|
|
|
|
|
TclGetNamespaceForQualName(interp, name, (Namespace *) contextNsPtr, |
|
|
(flags | FIND_ONLY_NS), &nsPtr, &dummy1Ptr, &dummy2Ptr, &dummy); |
|
|
|
|
|
if (nsPtr != NULL) { |
|
|
return (Tcl_Namespace *) nsPtr; |
|
|
} else if (flags & TCL_LEAVE_ERR_MSG) { |
|
|
Tcl_ResetResult(interp); |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
|
|
"unknown namespace \"", name, "\"", (char *) NULL); |
|
|
} |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_FindCommand -- |
|
|
* |
|
|
* Searches for a command. |
|
|
* |
|
|
* Results: |
|
|
* Returns a token for the command if it is found. Otherwise, if it |
|
|
* can't be found or there is an error, returns NULL and leaves an |
|
|
* error message in the interpreter's result object if "flags" |
|
|
* contains TCL_LEAVE_ERR_MSG. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
Tcl_Command |
|
|
Tcl_FindCommand(interp, name, contextNsPtr, flags) |
|
|
Tcl_Interp *interp; /* The interpreter in which to find the |
|
|
* command and to report errors. */ |
|
|
char *name; /* Command's name. If it starts with "::", |
|
|
* will be looked up in global namespace. |
|
|
* Else, looked up first in contextNsPtr |
|
|
* (current namespace if contextNsPtr is |
|
|
* NULL), then in global namespace. */ |
|
|
Tcl_Namespace *contextNsPtr; /* Ignored if TCL_GLOBAL_ONLY flag set. |
|
|
* Otherwise, points to namespace in which |
|
|
* to resolve name. If NULL, look up name |
|
|
* in the current namespace. */ |
|
|
int flags; /* An OR'd combination of flags: |
|
|
* TCL_GLOBAL_ONLY (look up name only in |
|
|
* global namespace), TCL_NAMESPACE_ONLY |
|
|
* (look up only in contextNsPtr, or the |
|
|
* current namespace if contextNsPtr is |
|
|
* NULL), and TCL_LEAVE_ERR_MSG. If both |
|
|
* TCL_GLOBAL_ONLY and TCL_NAMESPACE_ONLY |
|
|
* are given, TCL_GLOBAL_ONLY is |
|
|
* ignored. */ |
|
|
{ |
|
|
Interp *iPtr = (Interp*)interp; |
|
|
|
|
|
ResolverScheme *resPtr; |
|
|
Namespace *nsPtr[2], *cxtNsPtr; |
|
|
char *simpleName; |
|
|
register Tcl_HashEntry *entryPtr; |
|
|
register Command *cmdPtr; |
|
|
register int search; |
|
|
int result; |
|
|
Tcl_Command cmd; |
|
|
|
|
|
/* |
|
|
* If this namespace has a command resolver, then give it first |
|
|
* crack at the command resolution. If the interpreter has any |
|
|
* command resolvers, consult them next. The command resolver |
|
|
* procedures may return a Tcl_Command value, they may signal |
|
|
* to continue onward, or they may signal an error. |
|
|
*/ |
|
|
if ((flags & TCL_GLOBAL_ONLY) != 0) { |
|
|
cxtNsPtr = (Namespace *) Tcl_GetGlobalNamespace(interp); |
|
|
} |
|
|
else if (contextNsPtr != NULL) { |
|
|
cxtNsPtr = (Namespace *) contextNsPtr; |
|
|
} |
|
|
else { |
|
|
cxtNsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
|
|
} |
|
|
|
|
|
if (cxtNsPtr->cmdResProc != NULL || iPtr->resolverPtr != NULL) { |
|
|
resPtr = iPtr->resolverPtr; |
|
|
|
|
|
if (cxtNsPtr->cmdResProc) { |
|
|
result = (*cxtNsPtr->cmdResProc)(interp, name, |
|
|
(Tcl_Namespace *) cxtNsPtr, flags, &cmd); |
|
|
} else { |
|
|
result = TCL_CONTINUE; |
|
|
} |
|
|
|
|
|
while (result == TCL_CONTINUE && resPtr) { |
|
|
if (resPtr->cmdResProc) { |
|
|
result = (*resPtr->cmdResProc)(interp, name, |
|
|
(Tcl_Namespace *) cxtNsPtr, flags, &cmd); |
|
|
} |
|
|
resPtr = resPtr->nextPtr; |
|
|
} |
|
|
|
|
|
if (result == TCL_OK) { |
|
|
return cmd; |
|
|
} |
|
|
else if (result != TCL_CONTINUE) { |
|
|
return (Tcl_Command) NULL; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Find the namespace(s) that contain the command. |
|
|
*/ |
|
|
|
|
|
TclGetNamespaceForQualName(interp, name, (Namespace *) contextNsPtr, |
|
|
flags, &nsPtr[0], &nsPtr[1], &cxtNsPtr, &simpleName); |
|
|
|
|
|
/* |
|
|
* Look for the command in the command table of its namespace. |
|
|
* Be sure to check both possible search paths: from the specified |
|
|
* namespace context and from the global namespace. |
|
|
*/ |
|
|
|
|
|
cmdPtr = NULL; |
|
|
for (search = 0; (search < 2) && (cmdPtr == NULL); search++) { |
|
|
if ((nsPtr[search] != NULL) && (simpleName != NULL)) { |
|
|
entryPtr = Tcl_FindHashEntry(&nsPtr[search]->cmdTable, |
|
|
simpleName); |
|
|
if (entryPtr != NULL) { |
|
|
cmdPtr = (Command *) Tcl_GetHashValue(entryPtr); |
|
|
} |
|
|
} |
|
|
} |
|
|
if (cmdPtr != NULL) { |
|
|
return (Tcl_Command) cmdPtr; |
|
|
} else if (flags & TCL_LEAVE_ERR_MSG) { |
|
|
Tcl_ResetResult(interp); |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
|
|
"unknown command \"", name, "\"", (char *) NULL); |
|
|
} |
|
|
|
|
|
return (Tcl_Command) NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_FindNamespaceVar -- |
|
|
* |
|
|
* Searches for a namespace variable, a variable not local to a |
|
|
* procedure. The variable can be either a scalar or an array, but |
|
|
* may not be an element of an array. |
|
|
* |
|
|
* Results: |
|
|
* Returns a token for the variable if it is found. Otherwise, if it |
|
|
* can't be found or there is an error, returns NULL and leaves an |
|
|
* error message in the interpreter's result object if "flags" |
|
|
* contains TCL_LEAVE_ERR_MSG. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
Tcl_Var |
|
|
Tcl_FindNamespaceVar(interp, name, contextNsPtr, flags) |
|
|
Tcl_Interp *interp; /* The interpreter in which to find the |
|
|
* variable. */ |
|
|
char *name; /* Variable's name. If it starts with "::", |
|
|
* will be looked up in global namespace. |
|
|
* Else, looked up first in contextNsPtr |
|
|
* (current namespace if contextNsPtr is |
|
|
* NULL), then in global namespace. */ |
|
|
Tcl_Namespace *contextNsPtr; /* Ignored if TCL_GLOBAL_ONLY flag set. |
|
|
* Otherwise, points to namespace in which |
|
|
* to resolve name. If NULL, look up name |
|
|
* in the current namespace. */ |
|
|
int flags; /* An OR'd combination of flags: |
|
|
* TCL_GLOBAL_ONLY (look up name only in |
|
|
* global namespace), TCL_NAMESPACE_ONLY |
|
|
* (look up only in contextNsPtr, or the |
|
|
* current namespace if contextNsPtr is |
|
|
* NULL), and TCL_LEAVE_ERR_MSG. If both |
|
|
* TCL_GLOBAL_ONLY and TCL_NAMESPACE_ONLY |
|
|
* are given, TCL_GLOBAL_ONLY is |
|
|
* ignored. */ |
|
|
{ |
|
|
Interp *iPtr = (Interp*)interp; |
|
|
ResolverScheme *resPtr; |
|
|
Namespace *nsPtr[2], *cxtNsPtr; |
|
|
char *simpleName; |
|
|
Tcl_HashEntry *entryPtr; |
|
|
Var *varPtr; |
|
|
register int search; |
|
|
int result; |
|
|
Tcl_Var var; |
|
|
|
|
|
/* |
|
|
* If this namespace has a variable resolver, then give it first |
|
|
* crack at the variable resolution. It may return a Tcl_Var |
|
|
* value, it may signal to continue onward, or it may signal |
|
|
* an error. |
|
|
*/ |
|
|
if ((flags & TCL_GLOBAL_ONLY) != 0) { |
|
|
cxtNsPtr = (Namespace *) Tcl_GetGlobalNamespace(interp); |
|
|
} |
|
|
else if (contextNsPtr != NULL) { |
|
|
cxtNsPtr = (Namespace *) contextNsPtr; |
|
|
} |
|
|
else { |
|
|
cxtNsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
|
|
} |
|
|
|
|
|
if (cxtNsPtr->varResProc != NULL || iPtr->resolverPtr != NULL) { |
|
|
resPtr = iPtr->resolverPtr; |
|
|
|
|
|
if (cxtNsPtr->varResProc) { |
|
|
result = (*cxtNsPtr->varResProc)(interp, name, |
|
|
(Tcl_Namespace *) cxtNsPtr, flags, &var); |
|
|
} else { |
|
|
result = TCL_CONTINUE; |
|
|
} |
|
|
|
|
|
while (result == TCL_CONTINUE && resPtr) { |
|
|
if (resPtr->varResProc) { |
|
|
result = (*resPtr->varResProc)(interp, name, |
|
|
(Tcl_Namespace *) cxtNsPtr, flags, &var); |
|
|
} |
|
|
resPtr = resPtr->nextPtr; |
|
|
} |
|
|
|
|
|
if (result == TCL_OK) { |
|
|
return var; |
|
|
} |
|
|
else if (result != TCL_CONTINUE) { |
|
|
return (Tcl_Var) NULL; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Find the namespace(s) that contain the variable. |
|
|
*/ |
|
|
|
|
|
TclGetNamespaceForQualName(interp, name, (Namespace *) contextNsPtr, |
|
|
flags, &nsPtr[0], &nsPtr[1], &cxtNsPtr, &simpleName); |
|
|
|
|
|
/* |
|
|
* Look for the variable in the variable table of its namespace. |
|
|
* Be sure to check both possible search paths: from the specified |
|
|
* namespace context and from the global namespace. |
|
|
*/ |
|
|
|
|
|
varPtr = NULL; |
|
|
for (search = 0; (search < 2) && (varPtr == NULL); search++) { |
|
|
if ((nsPtr[search] != NULL) && (simpleName != NULL)) { |
|
|
entryPtr = Tcl_FindHashEntry(&nsPtr[search]->varTable, |
|
|
simpleName); |
|
|
if (entryPtr != NULL) { |
|
|
varPtr = (Var *) Tcl_GetHashValue(entryPtr); |
|
|
} |
|
|
} |
|
|
} |
|
|
if (varPtr != NULL) { |
|
|
return (Tcl_Var) varPtr; |
|
|
} else if (flags & TCL_LEAVE_ERR_MSG) { |
|
|
Tcl_ResetResult(interp); |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
|
|
"unknown variable \"", name, "\"", (char *) NULL); |
|
|
} |
|
|
return (Tcl_Var) NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TclResetShadowedCmdRefs -- |
|
|
* |
|
|
* Called when a command is added to a namespace to check for existing |
|
|
* command references that the new command may invalidate. Consider the |
|
|
* following cases that could happen when you add a command "foo" to a |
|
|
* namespace "b": |
|
|
* 1. It could shadow a command named "foo" at the global scope. |
|
|
* If it does, all command references in the namespace "b" are |
|
|
* suspect. |
|
|
* 2. Suppose the namespace "b" resides in a namespace "a". |
|
|
* Then to "a" the new command "b::foo" could shadow another |
|
|
* command "b::foo" in the global namespace. If so, then all |
|
|
* command references in "a" are suspect. |
|
|
* The same checks are applied to all parent namespaces, until we |
|
|
* reach the global :: namespace. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* If the new command shadows an existing command, the cmdRefEpoch |
|
|
* counter is incremented in each namespace that sees the shadow. |
|
|
* This invalidates all command references that were previously cached |
|
|
* in that namespace. The next time the commands are used, they are |
|
|
* resolved from scratch. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
TclResetShadowedCmdRefs(interp, newCmdPtr) |
|
|
Tcl_Interp *interp; /* Interpreter containing the new command. */ |
|
|
Command *newCmdPtr; /* Points to the new command. */ |
|
|
{ |
|
|
char *cmdName; |
|
|
Tcl_HashEntry *hPtr; |
|
|
register Namespace *nsPtr; |
|
|
Namespace *trailNsPtr, *shadowNsPtr; |
|
|
Namespace *globalNsPtr = (Namespace *) Tcl_GetGlobalNamespace(interp); |
|
|
int found, i; |
|
|
|
|
|
/* |
|
|
* This procedure generates an array used to hold the trail list. This |
|
|
* starts out with stack-allocated space but uses dynamically-allocated |
|
|
* storage if needed. |
|
|
*/ |
|
|
|
|
|
Namespace *(trailStorage[NUM_TRAIL_ELEMS]); |
|
|
Namespace **trailPtr = trailStorage; |
|
|
int trailFront = -1; |
|
|
int trailSize = NUM_TRAIL_ELEMS; |
|
|
|
|
|
/* |
|
|
* Start at the namespace containing the new command, and work up |
|
|
* through the list of parents. Stop just before the global namespace, |
|
|
* since the global namespace can't "shadow" its own entries. |
|
|
* |
|
|
* The namespace "trail" list we build consists of the names of each |
|
|
* namespace that encloses the new command, in order from outermost to |
|
|
* innermost: for example, "a" then "b". Each iteration of this loop |
|
|
* eventually extends the trail upwards by one namespace, nsPtr. We use |
|
|
* this trail list to see if nsPtr (e.g. "a" in 2. above) could have |
|
|
* now-invalid cached command references. This will happen if nsPtr |
|
|
* (e.g. "a") contains a sequence of child namespaces (e.g. "b") |
|
|
* such that there is a identically-named sequence of child namespaces |
|
|
* starting from :: (e.g. "::b") whose tail namespace contains a command |
|
|
* also named cmdName. |
|
|
*/ |
|
|
|
|
|
cmdName = Tcl_GetHashKey(newCmdPtr->hPtr->tablePtr, newCmdPtr->hPtr); |
|
|
for (nsPtr = newCmdPtr->nsPtr; |
|
|
(nsPtr != NULL) && (nsPtr != globalNsPtr); |
|
|
nsPtr = nsPtr->parentPtr) { |
|
|
/* |
|
|
* Find the maximal sequence of child namespaces contained in nsPtr |
|
|
* such that there is a identically-named sequence of child |
|
|
* namespaces starting from ::. shadowNsPtr will be the tail of this |
|
|
* sequence, or the deepest namespace under :: that might contain a |
|
|
* command now shadowed by cmdName. We check below if shadowNsPtr |
|
|
* actually contains a command cmdName. |
|
|
*/ |
|
|
|
|
|
found = 1; |
|
|
shadowNsPtr = globalNsPtr; |
|
|
|
|
|
for (i = trailFront; i >= 0; i--) { |
|
|
trailNsPtr = trailPtr[i]; |
|
|
hPtr = Tcl_FindHashEntry(&shadowNsPtr->childTable, |
|
|
trailNsPtr->name); |
|
|
if (hPtr != NULL) { |
|
|
shadowNsPtr = (Namespace *) Tcl_GetHashValue(hPtr); |
|
|
} else { |
|
|
found = 0; |
|
|
break; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* If shadowNsPtr contains a command named cmdName, we invalidate |
|
|
* all of the command refs cached in nsPtr. As a boundary case, |
|
|
* shadowNsPtr is initially :: and we check for case 1. above. |
|
|
*/ |
|
|
|
|
|
if (found) { |
|
|
hPtr = Tcl_FindHashEntry(&shadowNsPtr->cmdTable, cmdName); |
|
|
if (hPtr != NULL) { |
|
|
nsPtr->cmdRefEpoch++; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Insert nsPtr at the front of the trail list: i.e., at the end |
|
|
* of the trailPtr array. |
|
|
*/ |
|
|
|
|
|
trailFront++; |
|
|
if (trailFront == trailSize) { |
|
|
size_t currBytes = trailSize * sizeof(Namespace *); |
|
|
int newSize = 2*trailSize; |
|
|
size_t newBytes = newSize * sizeof(Namespace *); |
|
|
Namespace **newPtr = |
|
|
(Namespace **) ckalloc((unsigned) newBytes); |
|
|
|
|
|
memcpy((VOID *) newPtr, (VOID *) trailPtr, currBytes); |
|
|
if (trailPtr != trailStorage) { |
|
|
ckfree((char *) trailPtr); |
|
|
} |
|
|
trailPtr = newPtr; |
|
|
trailSize = newSize; |
|
|
} |
|
|
trailPtr[trailFront] = nsPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Free any allocated storage. |
|
|
*/ |
|
|
|
|
|
if (trailPtr != trailStorage) { |
|
|
ckfree((char *) trailPtr); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* GetNamespaceFromObj -- |
|
|
* |
|
|
* Gets the namespace specified by the name in a Tcl_Obj. |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if the namespace was resolved successfully, and |
|
|
* stores a pointer to the namespace in the location specified by |
|
|
* nsPtrPtr. If the namespace can't be found, the procedure stores |
|
|
* NULL in *nsPtrPtr and returns TCL_OK. If anything else goes wrong, |
|
|
* this procedure returns TCL_ERROR. |
|
|
* |
|
|
* Side effects: |
|
|
* May update the internal representation for the object, caching the |
|
|
* namespace reference. The next time this procedure is called, the |
|
|
* namespace value can be found quickly. |
|
|
* |
|
|
* If anything goes wrong, an error message is left in the |
|
|
* interpreter's result object. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
GetNamespaceFromObj(interp, objPtr, nsPtrPtr) |
|
|
Tcl_Interp *interp; /* The current interpreter. */ |
|
|
Tcl_Obj *objPtr; /* The object to be resolved as the name |
|
|
* of a namespace. */ |
|
|
Tcl_Namespace **nsPtrPtr; /* Result namespace pointer goes here. */ |
|
|
{ |
|
|
register ResolvedNsName *resNamePtr; |
|
|
register Namespace *nsPtr; |
|
|
Namespace *currNsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
|
|
int result; |
|
|
|
|
|
/* |
|
|
* Get the internal representation, converting to a namespace type if |
|
|
* needed. The internal representation is a ResolvedNsName that points |
|
|
* to the actual namespace. |
|
|
*/ |
|
|
|
|
|
if (objPtr->typePtr != &tclNsNameType) { |
|
|
result = tclNsNameType.setFromAnyProc(interp, objPtr); |
|
|
if (result != TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
resNamePtr = (ResolvedNsName *) objPtr->internalRep.otherValuePtr; |
|
|
|
|
|
/* |
|
|
* Check the context namespace of the resolved symbol to make sure that |
|
|
* it is fresh. If not, then force another conversion to the namespace |
|
|
* type, to discard the old rep and create a new one. Note that we |
|
|
* verify that the namespace id of the cached namespace is the same as |
|
|
* the id when we cached it; this insures that the namespace wasn't |
|
|
* deleted and a new one created at the same address. |
|
|
*/ |
|
|
|
|
|
nsPtr = NULL; |
|
|
if ((resNamePtr != NULL) |
|
|
&& (resNamePtr->refNsPtr == currNsPtr) |
|
|
&& (resNamePtr->nsId == resNamePtr->nsPtr->nsId)) { |
|
|
nsPtr = resNamePtr->nsPtr; |
|
|
if (nsPtr->flags & NS_DEAD) { |
|
|
nsPtr = NULL; |
|
|
} |
|
|
} |
|
|
if (nsPtr == NULL) { /* try again */ |
|
|
result = tclNsNameType.setFromAnyProc(interp, objPtr); |
|
|
if (result != TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
resNamePtr = (ResolvedNsName *) objPtr->internalRep.otherValuePtr; |
|
|
if (resNamePtr != NULL) { |
|
|
nsPtr = resNamePtr->nsPtr; |
|
|
if (nsPtr->flags & NS_DEAD) { |
|
|
nsPtr = NULL; |
|
|
} |
|
|
} |
|
|
} |
|
|
*nsPtrPtr = (Tcl_Namespace *) nsPtr; |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_NamespaceObjCmd -- |
|
|
* |
|
|
* Invoked to implement the "namespace" command that creates, deletes, |
|
|
* or manipulates Tcl namespaces. Handles the following syntax: |
|
|
* |
|
|
* namespace children ?name? ?pattern? |
|
|
* namespace code arg |
|
|
* namespace current |
|
|
* namespace delete ?name name...? |
|
|
* namespace eval name arg ?arg...? |
|
|
* namespace export ?-clear? ?pattern pattern...? |
|
|
* namespace forget ?pattern pattern...? |
|
|
* namespace import ?-force? ?pattern pattern...? |
|
|
* namespace inscope name arg ?arg...? |
|
|
* namespace origin name |
|
|
* namespace parent ?name? |
|
|
* namespace qualifiers string |
|
|
* namespace tail string |
|
|
* namespace which ?-command? ?-variable? name |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if the command is successful. Returns TCL_ERROR if |
|
|
* anything goes wrong. |
|
|
* |
|
|
* Side effects: |
|
|
* Based on the subcommand name (e.g., "import"), this procedure |
|
|
* dispatches to a corresponding procedure NamespaceXXXCmd defined |
|
|
* statically in this file. This procedure's side effects depend on |
|
|
* whatever that subcommand procedure does. If there is an error, this |
|
|
* procedure returns an error message in the interpreter's result |
|
|
* object. Otherwise it may return a result in the interpreter's result |
|
|
* object. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
Tcl_NamespaceObjCmd(clientData, interp, objc, objv) |
|
|
ClientData clientData; /* Arbitrary value passed to cmd. */ |
|
|
Tcl_Interp *interp; /* Current interpreter. */ |
|
|
register int objc; /* Number of arguments. */ |
|
|
register Tcl_Obj *CONST objv[]; /* Argument objects. */ |
|
|
{ |
|
|
static char *subCmds[] = { |
|
|
"children", "code", "current", "delete", |
|
|
"eval", "export", "forget", "import", |
|
|
"inscope", "origin", "parent", "qualifiers", |
|
|
"tail", "which", (char *) NULL}; |
|
|
enum NSSubCmdIdx { |
|
|
NSChildrenIdx, NSCodeIdx, NSCurrentIdx, NSDeleteIdx, |
|
|
NSEvalIdx, NSExportIdx, NSForgetIdx, NSImportIdx, |
|
|
NSInscopeIdx, NSOriginIdx, NSParentIdx, NSQualifiersIdx, |
|
|
NSTailIdx, NSWhichIdx |
|
|
}; |
|
|
int index, result; |
|
|
|
|
|
if (objc < 2) { |
|
|
Tcl_WrongNumArgs(interp, 1, objv, "subcommand ?arg ...?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Return an index reflecting the particular subcommand. |
|
|
*/ |
|
|
|
|
|
result = Tcl_GetIndexFromObj((Tcl_Interp *) interp, objv[1], subCmds, |
|
|
"option", /*flags*/ 0, (int *) &index); |
|
|
if (result != TCL_OK) { |
|
|
return result; |
|
|
} |
|
|
|
|
|
switch (index) { |
|
|
case NSChildrenIdx: |
|
|
result = NamespaceChildrenCmd(clientData, interp, objc, objv); |
|
|
break; |
|
|
case NSCodeIdx: |
|
|
result = NamespaceCodeCmd(clientData, interp, objc, objv); |
|
|
break; |
|
|
case NSCurrentIdx: |
|
|
result = NamespaceCurrentCmd(clientData, interp, objc, objv); |
|
|
break; |
|
|
case NSDeleteIdx: |
|
|
result = NamespaceDeleteCmd(clientData, interp, objc, objv); |
|
|
break; |
|
|
case NSEvalIdx: |
|
|
result = NamespaceEvalCmd(clientData, interp, objc, objv); |
|
|
break; |
|
|
case NSExportIdx: |
|
|
result = NamespaceExportCmd(clientData, interp, objc, objv); |
|
|
break; |
|
|
case NSForgetIdx: |
|
|
result = NamespaceForgetCmd(clientData, interp, objc, objv); |
|
|
break; |
|
|
case NSImportIdx: |
|
|
result = NamespaceImportCmd(clientData, interp, objc, objv); |
|
|
break; |
|
|
case NSInscopeIdx: |
|
|
result = NamespaceInscopeCmd(clientData, interp, objc, objv); |
|
|
break; |
|
|
case NSOriginIdx: |
|
|
result = NamespaceOriginCmd(clientData, interp, objc, objv); |
|
|
break; |
|
|
case NSParentIdx: |
|
|
result = NamespaceParentCmd(clientData, interp, objc, objv); |
|
|
break; |
|
|
case NSQualifiersIdx: |
|
|
result = NamespaceQualifiersCmd(clientData, interp, objc, objv); |
|
|
break; |
|
|
case NSTailIdx: |
|
|
result = NamespaceTailCmd(clientData, interp, objc, objv); |
|
|
break; |
|
|
case NSWhichIdx: |
|
|
result = NamespaceWhichCmd(clientData, interp, objc, objv); |
|
|
break; |
|
|
} |
|
|
return result; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* NamespaceChildrenCmd -- |
|
|
* |
|
|
* Invoked to implement the "namespace children" command that returns a |
|
|
* list containing the fully-qualified names of the child namespaces of |
|
|
* a given namespace. Handles the following syntax: |
|
|
* |
|
|
* namespace children ?name? ?pattern? |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
|
|
* |
|
|
* Side effects: |
|
|
* Returns a result in the interpreter's result object. If anything |
|
|
* goes wrong, the result is an error message. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
NamespaceChildrenCmd(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_Namespace *namespacePtr; |
|
|
Namespace *nsPtr, *childNsPtr; |
|
|
Namespace *globalNsPtr = (Namespace *) Tcl_GetGlobalNamespace(interp); |
|
|
char *pattern = NULL; |
|
|
Tcl_DString buffer; |
|
|
register Tcl_HashEntry *entryPtr; |
|
|
Tcl_HashSearch search; |
|
|
Tcl_Obj *listPtr, *elemPtr; |
|
|
|
|
|
/* |
|
|
* Get a pointer to the specified namespace, or the current namespace. |
|
|
*/ |
|
|
|
|
|
if (objc == 2) { |
|
|
nsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
|
|
} else if ((objc == 3) || (objc == 4)) { |
|
|
if (GetNamespaceFromObj(interp, objv[2], &namespacePtr) != TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (namespacePtr == NULL) { |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
|
|
"unknown namespace \"", Tcl_GetString(objv[2]), |
|
|
"\" in namespace children command", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
nsPtr = (Namespace *) namespacePtr; |
|
|
} else { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "?name? ?pattern?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Get the glob-style pattern, if any, used to narrow the search. |
|
|
*/ |
|
|
|
|
|
Tcl_DStringInit(&buffer); |
|
|
if (objc == 4) { |
|
|
char *name = Tcl_GetString(objv[3]); |
|
|
|
|
|
if ((*name == ':') && (*(name+1) == ':')) { |
|
|
pattern = name; |
|
|
} else { |
|
|
Tcl_DStringAppend(&buffer, nsPtr->fullName, -1); |
|
|
if (nsPtr != globalNsPtr) { |
|
|
Tcl_DStringAppend(&buffer, "::", 2); |
|
|
} |
|
|
Tcl_DStringAppend(&buffer, name, -1); |
|
|
pattern = Tcl_DStringValue(&buffer); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Create a list containing the full names of all child namespaces |
|
|
* whose names match the specified pattern, if any. |
|
|
*/ |
|
|
|
|
|
listPtr = Tcl_NewListObj(0, (Tcl_Obj **) NULL); |
|
|
entryPtr = Tcl_FirstHashEntry(&nsPtr->childTable, &search); |
|
|
while (entryPtr != NULL) { |
|
|
childNsPtr = (Namespace *) Tcl_GetHashValue(entryPtr); |
|
|
if ((pattern == NULL) |
|
|
|| Tcl_StringMatch(childNsPtr->fullName, pattern)) { |
|
|
elemPtr = Tcl_NewStringObj(childNsPtr->fullName, -1); |
|
|
Tcl_ListObjAppendElement(interp, listPtr, elemPtr); |
|
|
} |
|
|
entryPtr = Tcl_NextHashEntry(&search); |
|
|
} |
|
|
|
|
|
Tcl_SetObjResult(interp, listPtr); |
|
|
Tcl_DStringFree(&buffer); |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* NamespaceCodeCmd -- |
|
|
* |
|
|
* Invoked to implement the "namespace code" command to capture the |
|
|
* namespace context of a command. Handles the following syntax: |
|
|
* |
|
|
* namespace code arg |
|
|
* |
|
|
* Here "arg" can be a list. "namespace code arg" produces a result |
|
|
* equivalent to that produced by the command |
|
|
* |
|
|
* list namespace inscope [namespace current] $arg |
|
|
* |
|
|
* However, if "arg" is itself a scoped value starting with |
|
|
* "namespace inscope", then the result is just "arg". |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if successful, and 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. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
NamespaceCodeCmd(dummy, interp, objc, objv) |
|
|
ClientData dummy; /* Not used. */ |
|
|
Tcl_Interp *interp; /* Current interpreter. */ |
|
|
int objc; /* Number of arguments. */ |
|
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
|
|
{ |
|
|
Namespace *currNsPtr; |
|
|
Tcl_Obj *listPtr, *objPtr; |
|
|
register char *arg, *p; |
|
|
int length; |
|
|
|
|
|
if (objc != 3) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "arg"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* If "arg" is already a scoped value, then return it directly. |
|
|
*/ |
|
|
|
|
|
arg = Tcl_GetStringFromObj(objv[2], &length); |
|
|
if ((*arg == 'n') && (length > 17) |
|
|
&& (strncmp(arg, "namespace", 9) == 0)) { |
|
|
for (p = (arg + 9); (*p == ' '); p++) { |
|
|
/* empty body: skip over spaces */ |
|
|
} |
|
|
if ((*p == 'i') && ((p + 7) <= (arg + length)) |
|
|
&& (strncmp(p, "inscope", 7) == 0)) { |
|
|
Tcl_SetObjResult(interp, objv[2]); |
|
|
return TCL_OK; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Otherwise, construct a scoped command by building a list with |
|
|
* "namespace inscope", the full name of the current namespace, and |
|
|
* the argument "arg". By constructing a list, we ensure that scoped |
|
|
* commands are interpreted properly when they are executed later, |
|
|
* by the "namespace inscope" command. |
|
|
*/ |
|
|
|
|
|
listPtr = Tcl_NewListObj(0, (Tcl_Obj **) NULL); |
|
|
Tcl_ListObjAppendElement(interp, listPtr, |
|
|
Tcl_NewStringObj("namespace", -1)); |
|
|
Tcl_ListObjAppendElement(interp, listPtr, |
|
|
Tcl_NewStringObj("inscope", -1)); |
|
|
|
|
|
currNsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
|
|
if (currNsPtr == (Namespace *) Tcl_GetGlobalNamespace(interp)) { |
|
|
objPtr = Tcl_NewStringObj("::", -1); |
|
|
} else { |
|
|
objPtr = Tcl_NewStringObj(currNsPtr->fullName, -1); |
|
|
} |
|
|
Tcl_ListObjAppendElement(interp, listPtr, objPtr); |
|
|
|
|
|
Tcl_ListObjAppendElement(interp, listPtr, objv[2]); |
|
|
|
|
|
Tcl_SetObjResult(interp, listPtr); |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* NamespaceCurrentCmd -- |
|
|
* |
|
|
* Invoked to implement the "namespace current" command which returns |
|
|
* the fully-qualified name of the current namespace. Handles the |
|
|
* following syntax: |
|
|
* |
|
|
* namespace current |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
|
|
* |
|
|
* Side effects: |
|
|
* Returns a result in the interpreter's result object. If anything |
|
|
* goes wrong, the result is an error message. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
NamespaceCurrentCmd(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 Namespace *currNsPtr; |
|
|
|
|
|
if (objc != 2) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* The "real" name of the global namespace ("::") is the null string, |
|
|
* but we return "::" for it as a convenience to programmers. Note that |
|
|
* "" and "::" are treated as synonyms by the namespace code so that it |
|
|
* is still easy to do things like: |
|
|
* |
|
|
* namespace [namespace current]::bar { ... } |
|
|
*/ |
|
|
|
|
|
currNsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
|
|
if (currNsPtr == (Namespace *) Tcl_GetGlobalNamespace(interp)) { |
|
|
Tcl_AppendToObj(Tcl_GetObjResult(interp), "::", -1); |
|
|
} else { |
|
|
Tcl_AppendToObj(Tcl_GetObjResult(interp), currNsPtr->fullName, -1); |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* NamespaceDeleteCmd -- |
|
|
* |
|
|
* Invoked to implement the "namespace delete" command to delete |
|
|
* namespace(s). Handles the following syntax: |
|
|
* |
|
|
* namespace delete ?name name...? |
|
|
* |
|
|
* Each name identifies a namespace. It may include a sequence of |
|
|
* namespace qualifiers separated by "::"s. If a namespace is found, it |
|
|
* is deleted: all variables and procedures contained in that namespace |
|
|
* are deleted. If that namespace is being used on the call stack, it |
|
|
* is kept alive (but logically deleted) until it is removed from the |
|
|
* call stack: that is, it can no longer be referenced by name but any |
|
|
* currently executing procedure that refers to it is allowed to do so |
|
|
* until the procedure returns. If the namespace can't be found, this |
|
|
* procedure returns an error. If no namespaces are specified, this |
|
|
* command does nothing. |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
|
|
* |
|
|
* Side effects: |
|
|
* Deletes the specified namespaces. If anything goes wrong, this |
|
|
* procedure returns an error message in the interpreter's |
|
|
* result object. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
NamespaceDeleteCmd(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_Namespace *namespacePtr; |
|
|
char *name; |
|
|
register int i; |
|
|
|
|
|
if (objc < 2) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "?name name...?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Destroying one namespace may cause another to be destroyed. Break |
|
|
* this into two passes: first check to make sure that all namespaces on |
|
|
* the command line are valid, and report any errors. |
|
|
*/ |
|
|
|
|
|
for (i = 2; i < objc; i++) { |
|
|
name = Tcl_GetString(objv[i]); |
|
|
namespacePtr = Tcl_FindNamespace(interp, name, |
|
|
(Tcl_Namespace *) NULL, /*flags*/ 0); |
|
|
if (namespacePtr == NULL) { |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
|
|
"unknown namespace \"", Tcl_GetString(objv[i]), |
|
|
"\" in namespace delete command", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Okay, now delete each namespace. |
|
|
*/ |
|
|
|
|
|
for (i = 2; i < objc; i++) { |
|
|
name = Tcl_GetString(objv[i]); |
|
|
namespacePtr = Tcl_FindNamespace(interp, name, |
|
|
(Tcl_Namespace *) NULL, /* flags */ 0); |
|
|
if (namespacePtr) { |
|
|
Tcl_DeleteNamespace(namespacePtr); |
|
|
} |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* NamespaceEvalCmd -- |
|
|
* |
|
|
* Invoked to implement the "namespace eval" command. Executes |
|
|
* commands in a namespace. If the namespace does not already exist, |
|
|
* it is created. Handles the following syntax: |
|
|
* |
|
|
* namespace eval name arg ?arg...? |
|
|
* |
|
|
* If more than one arg argument is specified, the command that is |
|
|
* executed is the result of concatenating the arguments together with |
|
|
* a space between each argument. |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if the namespace is found and the commands are |
|
|
* executed successfully. Returns TCL_ERROR if anything goes wrong. |
|
|
* |
|
|
* Side effects: |
|
|
* Returns the result of the command in the interpreter's result |
|
|
* object. If anything goes wrong, this procedure returns an error |
|
|
* message as the result. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
NamespaceEvalCmd(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_Namespace *namespacePtr; |
|
|
Tcl_CallFrame frame; |
|
|
Tcl_Obj *objPtr; |
|
|
char *name; |
|
|
int length, result; |
|
|
|
|
|
if (objc < 4) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "name arg ?arg...?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Try to resolve the namespace reference, caching the result in the |
|
|
* namespace object along the way. |
|
|
*/ |
|
|
|
|
|
result = GetNamespaceFromObj(interp, objv[2], &namespacePtr); |
|
|
if (result != TCL_OK) { |
|
|
return result; |
|
|
} |
|
|
|
|
|
/* |
|
|
* If the namespace wasn't found, try to create it. |
|
|
*/ |
|
|
|
|
|
if (namespacePtr == NULL) { |
|
|
name = Tcl_GetStringFromObj(objv[2], &length); |
|
|
namespacePtr = Tcl_CreateNamespace(interp, name, (ClientData) NULL, |
|
|
(Tcl_NamespaceDeleteProc *) NULL); |
|
|
if (namespacePtr == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Make the specified namespace the current namespace and evaluate |
|
|
* the command(s). |
|
|
*/ |
|
|
|
|
|
result = Tcl_PushCallFrame(interp, &frame, namespacePtr, |
|
|
/*isProcCallFrame*/ 0); |
|
|
if (result != TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
if (objc == 4) { |
|
|
result = Tcl_EvalObjEx(interp, objv[3], 0); |
|
|
} else { |
|
|
/* |
|
|
* More than one argument: concatenate them together with spaces |
|
|
* between, then evaluate the result. Tcl_EvalObjEx will delete |
|
|
* the object when it decrements its refcount after eval'ing it. |
|
|
*/ |
|
|
objPtr = Tcl_ConcatObj(objc-3, objv+3); |
|
|
result = Tcl_EvalObjEx(interp, objPtr, TCL_EVAL_DIRECT); |
|
|
} |
|
|
if (result == TCL_ERROR) { |
|
|
char msg[256 + TCL_INTEGER_SPACE]; |
|
|
|
|
|
sprintf(msg, "\n (in namespace eval \"%.200s\" script line %d)", |
|
|
namespacePtr->fullName, interp->errorLine); |
|
|
Tcl_AddObjErrorInfo(interp, msg, -1); |
|
|
} |
|
|
|
|
|
/* |
|
|
* Restore the previous "current" namespace. |
|
|
*/ |
|
|
|
|
|
Tcl_PopCallFrame(interp); |
|
|
return result; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* NamespaceExportCmd -- |
|
|
* |
|
|
* Invoked to implement the "namespace export" command that specifies |
|
|
* which commands are exported from a namespace. The exported commands |
|
|
* are those that can be imported into another namespace using |
|
|
* "namespace import". Both commands defined in a namespace and |
|
|
* commands the namespace has imported can be exported by a |
|
|
* namespace. This command has the following syntax: |
|
|
* |
|
|
* namespace export ?-clear? ?pattern pattern...? |
|
|
* |
|
|
* Each pattern may contain "string match"-style pattern matching |
|
|
* special characters, but the pattern may not include any namespace |
|
|
* qualifiers: that is, the pattern must specify commands in the |
|
|
* current (exporting) namespace. The specified patterns are appended |
|
|
* onto the namespace's list of export patterns. |
|
|
* |
|
|
* To reset the namespace's export pattern list, specify the "-clear" |
|
|
* flag. |
|
|
* |
|
|
* If there are no export patterns and the "-clear" flag isn't given, |
|
|
* this command returns the namespace's current export list. |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
|
|
* |
|
|
* Side effects: |
|
|
* Returns a result in the interpreter's result object. If anything |
|
|
* goes wrong, the result is an error message. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
NamespaceExportCmd(dummy, interp, objc, objv) |
|
|
ClientData dummy; /* Not used. */ |
|
|
Tcl_Interp *interp; /* Current interpreter. */ |
|
|
int objc; /* Number of arguments. */ |
|
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
|
|
{ |
|
|
Namespace *currNsPtr = (Namespace*) Tcl_GetCurrentNamespace(interp); |
|
|
char *pattern, *string; |
|
|
int resetListFirst = 0; |
|
|
int firstArg, patternCt, i, result; |
|
|
|
|
|
if (objc < 2) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, |
|
|
"?-clear? ?pattern pattern...?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Process the optional "-clear" argument. |
|
|
*/ |
|
|
|
|
|
firstArg = 2; |
|
|
if (firstArg < objc) { |
|
|
string = Tcl_GetString(objv[firstArg]); |
|
|
if (strcmp(string, "-clear") == 0) { |
|
|
resetListFirst = 1; |
|
|
firstArg++; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* If no pattern arguments are given, and "-clear" isn't specified, |
|
|
* return the namespace's current export pattern list. |
|
|
*/ |
|
|
|
|
|
patternCt = (objc - firstArg); |
|
|
if (patternCt == 0) { |
|
|
if (firstArg > 2) { |
|
|
return TCL_OK; |
|
|
} else { /* create list with export patterns */ |
|
|
Tcl_Obj *listPtr = Tcl_NewListObj(0, (Tcl_Obj **) NULL); |
|
|
result = Tcl_AppendExportList(interp, |
|
|
(Tcl_Namespace *) currNsPtr, listPtr); |
|
|
if (result != TCL_OK) { |
|
|
return result; |
|
|
} |
|
|
Tcl_SetObjResult(interp, listPtr); |
|
|
return TCL_OK; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Add each pattern to the namespace's export pattern list. |
|
|
*/ |
|
|
|
|
|
for (i = firstArg; i < objc; i++) { |
|
|
pattern = Tcl_GetString(objv[i]); |
|
|
result = Tcl_Export(interp, (Tcl_Namespace *) currNsPtr, pattern, |
|
|
((i == firstArg)? resetListFirst : 0)); |
|
|
if (result != TCL_OK) { |
|
|
return result; |
|
|
} |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* NamespaceForgetCmd -- |
|
|
* |
|
|
* Invoked to implement the "namespace forget" command to remove |
|
|
* imported commands from a namespace. Handles the following syntax: |
|
|
* |
|
|
* namespace forget ?pattern pattern...? |
|
|
* |
|
|
* Each pattern is a name like "foo::*" or "a::b::x*". That is, the |
|
|
* pattern may include the special pattern matching characters |
|
|
* recognized by the "string match" command, but only in the command |
|
|
* name at the end of the qualified name; the special pattern |
|
|
* characters may not appear in a namespace name. All of the commands |
|
|
* that match that pattern are checked to see if they have an imported |
|
|
* command in the current namespace that refers to the matched |
|
|
* command. If there is an alias, it is removed. |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
|
|
* |
|
|
* Side effects: |
|
|
* Imported commands are removed from the current namespace. If |
|
|
* anything goes wrong, this procedure returns an error message in the |
|
|
* interpreter's result object. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
NamespaceForgetCmd(dummy, interp, objc, objv) |
|
|
ClientData dummy; /* Not used. */ |
|
|
Tcl_Interp *interp; /* Current interpreter. */ |
|
|
int objc; /* Number of arguments. */ |
|
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
|
|
{ |
|
|
char *pattern; |
|
|
register int i, result; |
|
|
|
|
|
if (objc < 2) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "?pattern pattern...?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
for (i = 2; i < objc; i++) { |
|
|
pattern = Tcl_GetString(objv[i]); |
|
|
result = Tcl_ForgetImport(interp, (Tcl_Namespace *) NULL, pattern); |
|
|
if (result != TCL_OK) { |
|
|
return result; |
|
|
} |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* NamespaceImportCmd -- |
|
|
* |
|
|
* Invoked to implement the "namespace import" command that imports |
|
|
* commands into a namespace. Handles the following syntax: |
|
|
* |
|
|
* namespace import ?-force? ?pattern pattern...? |
|
|
* |
|
|
* Each pattern is a namespace-qualified name like "foo::*", |
|
|
* "a::b::x*", or "bar::p". That is, the pattern may include the |
|
|
* special pattern matching characters recognized by the "string match" |
|
|
* command, but only in the command name at the end of the qualified |
|
|
* name; the special pattern characters may not appear in a namespace |
|
|
* name. All of the commands that match the pattern and which are |
|
|
* exported from their namespace are made accessible from the current |
|
|
* namespace context. This is done by creating a new "imported command" |
|
|
* in the current namespace that points to the real command in its |
|
|
* original namespace; when the imported command is called, it invokes |
|
|
* the real command. |
|
|
* |
|
|
* If an imported command conflicts with an existing command, it is |
|
|
* treated as an error. But if the "-force" option is included, then |
|
|
* existing commands are overwritten by the imported commands. |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
|
|
* |
|
|
* Side effects: |
|
|
* Adds imported commands to the current namespace. If anything goes |
|
|
* wrong, this procedure returns an error message in the interpreter's |
|
|
* result object. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
NamespaceImportCmd(dummy, interp, objc, objv) |
|
|
ClientData dummy; /* Not used. */ |
|
|
Tcl_Interp *interp; /* Current interpreter. */ |
|
|
int objc; /* Number of arguments. */ |
|
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
|
|
{ |
|
|
int allowOverwrite = 0; |
|
|
char *string, *pattern; |
|
|
register int i, result; |
|
|
int firstArg; |
|
|
|
|
|
if (objc < 2) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, |
|
|
"?-force? ?pattern pattern...?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Skip over the optional "-force" as the first argument. |
|
|
*/ |
|
|
|
|
|
firstArg = 2; |
|
|
if (firstArg < objc) { |
|
|
string = Tcl_GetString(objv[firstArg]); |
|
|
if ((*string == '-') && (strcmp(string, "-force") == 0)) { |
|
|
allowOverwrite = 1; |
|
|
firstArg++; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Handle the imports for each of the patterns. |
|
|
*/ |
|
|
|
|
|
for (i = firstArg; i < objc; i++) { |
|
|
pattern = Tcl_GetString(objv[i]); |
|
|
result = Tcl_Import(interp, (Tcl_Namespace *) NULL, pattern, |
|
|
allowOverwrite); |
|
|
if (result != TCL_OK) { |
|
|
return result; |
|
|
} |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* NamespaceInscopeCmd -- |
|
|
* |
|
|
* Invoked to implement the "namespace inscope" command that executes a |
|
|
* script in the context of a particular namespace. This command is not |
|
|
* expected to be used directly by programmers; calls to it are |
|
|
* generated implicitly when programs use "namespace code" commands |
|
|
* to register callback scripts. Handles the following syntax: |
|
|
* |
|
|
* namespace inscope name arg ?arg...? |
|
|
* |
|
|
* The "namespace inscope" command is much like the "namespace eval" |
|
|
* command except that it has lappend semantics and the namespace must |
|
|
* already exist. It treats the first argument as a list, and appends |
|
|
* any arguments after the first onto the end as proper list elements. |
|
|
* For example, |
|
|
* |
|
|
* namespace inscope ::foo a b c d |
|
|
* |
|
|
* is equivalent to |
|
|
* |
|
|
* namespace eval ::foo [concat a [list b c d]] |
|
|
* |
|
|
* This lappend semantics is important because many callback scripts |
|
|
* are actually prefixes. |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK to indicate success, or TCL_ERROR to indicate |
|
|
* failure. |
|
|
* |
|
|
* Side effects: |
|
|
* Returns a result in the Tcl interpreter's result object. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
NamespaceInscopeCmd(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_Namespace *namespacePtr; |
|
|
Tcl_CallFrame frame; |
|
|
int i, result; |
|
|
|
|
|
if (objc < 4) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "name arg ?arg...?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Resolve the namespace reference. |
|
|
*/ |
|
|
|
|
|
result = GetNamespaceFromObj(interp, objv[2], &namespacePtr); |
|
|
if (result != TCL_OK) { |
|
|
return result; |
|
|
} |
|
|
if (namespacePtr == NULL) { |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
|
|
"unknown namespace \"", Tcl_GetString(objv[2]), |
|
|
"\" in inscope namespace command", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Make the specified namespace the current namespace. |
|
|
*/ |
|
|
|
|
|
result = Tcl_PushCallFrame(interp, &frame, namespacePtr, |
|
|
/*isProcCallFrame*/ 0); |
|
|
if (result != TCL_OK) { |
|
|
return result; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Execute the command. If there is just one argument, just treat it as |
|
|
* a script and evaluate it. Otherwise, create a list from the arguments |
|
|
* after the first one, then concatenate the first argument and the list |
|
|
* of extra arguments to form the command to evaluate. |
|
|
*/ |
|
|
|
|
|
if (objc == 4) { |
|
|
result = Tcl_EvalObjEx(interp, objv[3], 0); |
|
|
} else { |
|
|
Tcl_Obj *concatObjv[2]; |
|
|
register Tcl_Obj *listPtr, *cmdObjPtr; |
|
|
|
|
|
listPtr = Tcl_NewListObj(0, (Tcl_Obj **) NULL); |
|
|
for (i = 4; i < objc; i++) { |
|
|
result = Tcl_ListObjAppendElement(interp, listPtr, objv[i]); |
|
|
if (result != TCL_OK) { |
|
|
Tcl_DecrRefCount(listPtr); /* free unneeded obj */ |
|
|
return result; |
|
|
} |
|
|
} |
|
|
|
|
|
concatObjv[0] = objv[3]; |
|
|
concatObjv[1] = listPtr; |
|
|
cmdObjPtr = Tcl_ConcatObj(2, concatObjv); |
|
|
result = Tcl_EvalObjEx(interp, cmdObjPtr, TCL_EVAL_DIRECT); |
|
|
Tcl_DecrRefCount(listPtr); /* we're done with the list object */ |
|
|
} |
|
|
if (result == TCL_ERROR) { |
|
|
char msg[256 + TCL_INTEGER_SPACE]; |
|
|
|
|
|
sprintf(msg, |
|
|
"\n (in namespace inscope \"%.200s\" script line %d)", |
|
|
namespacePtr->fullName, interp->errorLine); |
|
|
Tcl_AddObjErrorInfo(interp, msg, -1); |
|
|
} |
|
|
|
|
|
/* |
|
|
* Restore the previous "current" namespace. |
|
|
*/ |
|
|
|
|
|
Tcl_PopCallFrame(interp); |
|
|
return result; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* NamespaceOriginCmd -- |
|
|
* |
|
|
* Invoked to implement the "namespace origin" command to return the |
|
|
* fully-qualified name of the "real" command to which the specified |
|
|
* "imported command" refers. Handles the following syntax: |
|
|
* |
|
|
* namespace origin name |
|
|
* |
|
|
* Results: |
|
|
* An imported command is created in an namespace when that namespace |
|
|
* imports a command from another namespace. If a command is imported |
|
|
* into a sequence of namespaces a, b,...,n where each successive |
|
|
* namespace just imports the command from the previous namespace, this |
|
|
* command returns the fully-qualified name of the original command in |
|
|
* the first namespace, a. If "name" does not refer to an alias, its |
|
|
* fully-qualified name is returned. The returned name is stored in the |
|
|
* interpreter's result object. This procedure returns TCL_OK if |
|
|
* successful, and TCL_ERROR if anything goes wrong. |
|
|
* |
|
|
* Side effects: |
|
|
* If anything goes wrong, this procedure returns an error message in |
|
|
* the interpreter's result object. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
NamespaceOriginCmd(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_Command command, origCommand; |
|
|
|
|
|
if (objc != 3) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "name"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
command = Tcl_GetCommandFromObj(interp, objv[2]); |
|
|
if (command == (Tcl_Command) NULL) { |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
|
|
"invalid command name \"", Tcl_GetString(objv[2]), |
|
|
"\"", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
origCommand = TclGetOriginalCommand(command); |
|
|
if (origCommand == (Tcl_Command) NULL) { |
|
|
/* |
|
|
* The specified command isn't an imported command. Return the |
|
|
* command's name qualified by the full name of the namespace it |
|
|
* was defined in. |
|
|
*/ |
|
|
|
|
|
Tcl_GetCommandFullName(interp, command, Tcl_GetObjResult(interp)); |
|
|
} else { |
|
|
Tcl_GetCommandFullName(interp, origCommand, Tcl_GetObjResult(interp)); |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* NamespaceParentCmd -- |
|
|
* |
|
|
* Invoked to implement the "namespace parent" command that returns the |
|
|
* fully-qualified name of the parent namespace for a specified |
|
|
* namespace. Handles the following syntax: |
|
|
* |
|
|
* namespace parent ?name? |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
|
|
* |
|
|
* Side effects: |
|
|
* Returns a result in the interpreter's result object. If anything |
|
|
* goes wrong, the result is an error message. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
NamespaceParentCmd(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_Namespace *nsPtr; |
|
|
int result; |
|
|
|
|
|
if (objc == 2) { |
|
|
nsPtr = Tcl_GetCurrentNamespace(interp); |
|
|
} else if (objc == 3) { |
|
|
result = GetNamespaceFromObj(interp, objv[2], &nsPtr); |
|
|
if (result != TCL_OK) { |
|
|
return result; |
|
|
} |
|
|
if (nsPtr == NULL) { |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
|
|
"unknown namespace \"", Tcl_GetString(objv[2]), |
|
|
"\" in namespace parent command", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} else { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "?name?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Report the parent of the specified namespace. |
|
|
*/ |
|
|
|
|
|
if (nsPtr->parentPtr != NULL) { |
|
|
Tcl_SetStringObj(Tcl_GetObjResult(interp), |
|
|
nsPtr->parentPtr->fullName, -1); |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* NamespaceQualifiersCmd -- |
|
|
* |
|
|
* Invoked to implement the "namespace qualifiers" command that returns |
|
|
* any leading namespace qualifiers in a string. These qualifiers are |
|
|
* namespace names separated by "::"s. For example, for "::foo::p" this |
|
|
* command returns "::foo", and for "::" it returns "". This command |
|
|
* is the complement of the "namespace tail" command. Note that this |
|
|
* command does not check whether the "namespace" names are, in fact, |
|
|
* the names of currently defined namespaces. Handles the following |
|
|
* syntax: |
|
|
* |
|
|
* namespace qualifiers string |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
|
|
* |
|
|
* Side effects: |
|
|
* Returns a result in the interpreter's result object. If anything |
|
|
* goes wrong, the result is an error message. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
NamespaceQualifiersCmd(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 char *name, *p; |
|
|
int length; |
|
|
|
|
|
if (objc != 3) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "string"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Find the end of the string, then work backward and find |
|
|
* the start of the last "::" qualifier. |
|
|
*/ |
|
|
|
|
|
name = Tcl_GetString(objv[2]); |
|
|
for (p = name; *p != '\0'; p++) { |
|
|
/* empty body */ |
|
|
} |
|
|
while (--p >= name) { |
|
|
if ((*p == ':') && (p > name) && (*(p-1) == ':')) { |
|
|
p -= 2; /* back up over the :: */ |
|
|
while ((p >= name) && (*p == ':')) { |
|
|
p--; /* back up over the preceeding : */ |
|
|
} |
|
|
break; |
|
|
} |
|
|
} |
|
|
|
|
|
if (p >= name) { |
|
|
length = p-name+1; |
|
|
Tcl_AppendToObj(Tcl_GetObjResult(interp), name, length); |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* NamespaceTailCmd -- |
|
|
* |
|
|
* Invoked to implement the "namespace tail" command that returns the |
|
|
* trailing name at the end of a string with "::" namespace |
|
|
* qualifiers. These qualifiers are namespace names separated by |
|
|
* "::"s. For example, for "::foo::p" this command returns "p", and for |
|
|
* "::" it returns "". This command is the complement of the "namespace |
|
|
* qualifiers" command. Note that this command does not check whether |
|
|
* the "namespace" names are, in fact, the names of currently defined |
|
|
* namespaces. Handles the following syntax: |
|
|
* |
|
|
* namespace tail string |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
|
|
* |
|
|
* Side effects: |
|
|
* Returns a result in the interpreter's result object. If anything |
|
|
* goes wrong, the result is an error message. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
NamespaceTailCmd(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 char *name, *p; |
|
|
|
|
|
if (objc != 3) { |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "string"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Find the end of the string, then work backward and find the |
|
|
* last "::" qualifier. |
|
|
*/ |
|
|
|
|
|
name = Tcl_GetString(objv[2]); |
|
|
for (p = name; *p != '\0'; p++) { |
|
|
/* empty body */ |
|
|
} |
|
|
while (--p > name) { |
|
|
if ((*p == ':') && (*(p-1) == ':')) { |
|
|
p++; /* just after the last "::" */ |
|
|
break; |
|
|
} |
|
|
} |
|
|
|
|
|
if (p >= name) { |
|
|
Tcl_AppendToObj(Tcl_GetObjResult(interp), p, -1); |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* NamespaceWhichCmd -- |
|
|
* |
|
|
* Invoked to implement the "namespace which" command that returns the |
|
|
* fully-qualified name of a command or variable. If the specified |
|
|
* command or variable does not exist, it returns "". Handles the |
|
|
* following syntax: |
|
|
* |
|
|
* namespace which ?-command? ?-variable? name |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
|
|
* |
|
|
* Side effects: |
|
|
* Returns a result in the interpreter's result object. If anything |
|
|
* goes wrong, the result is an error message. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
NamespaceWhichCmd(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 char *arg; |
|
|
Tcl_Command cmd; |
|
|
Tcl_Var variable; |
|
|
int argIndex, lookup; |
|
|
|
|
|
if (objc < 3) { |
|
|
badArgs: |
|
|
Tcl_WrongNumArgs(interp, 2, objv, |
|
|
"?-command? ?-variable? name"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Look for a flag controlling the lookup. |
|
|
*/ |
|
|
|
|
|
argIndex = 2; |
|
|
lookup = 0; /* assume command lookup by default */ |
|
|
arg = Tcl_GetString(objv[2]); |
|
|
if (*arg == '-') { |
|
|
if (strncmp(arg, "-command", 8) == 0) { |
|
|
lookup = 0; |
|
|
} else if (strncmp(arg, "-variable", 9) == 0) { |
|
|
lookup = 1; |
|
|
} else { |
|
|
goto badArgs; |
|
|
} |
|
|
argIndex = 3; |
|
|
} |
|
|
if (objc != (argIndex + 1)) { |
|
|
goto badArgs; |
|
|
} |
|
|
|
|
|
switch (lookup) { |
|
|
case 0: /* -command */ |
|
|
cmd = Tcl_GetCommandFromObj(interp, objv[argIndex]); |
|
|
if (cmd == (Tcl_Command) NULL) { |
|
|
return TCL_OK; /* cmd not found, just return (no error) */ |
|
|
} |
|
|
Tcl_GetCommandFullName(interp, cmd, Tcl_GetObjResult(interp)); |
|
|
break; |
|
|
|
|
|
case 1: /* -variable */ |
|
|
arg = Tcl_GetString(objv[argIndex]); |
|
|
variable = Tcl_FindNamespaceVar(interp, arg, (Tcl_Namespace *) NULL, |
|
|
/*flags*/ 0); |
|
|
if (variable != (Tcl_Var) NULL) { |
|
|
Tcl_GetVariableFullName(interp, variable, Tcl_GetObjResult(interp)); |
|
|
} |
|
|
break; |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* FreeNsNameInternalRep -- |
|
|
* |
|
|
* Frees the resources associated with a nsName object's internal |
|
|
* representation. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Decrements the ref count of any Namespace structure pointed |
|
|
* to by the nsName's internal representation. If there are no more |
|
|
* references to the namespace, it's structure will be freed. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
FreeNsNameInternalRep(objPtr) |
|
|
register Tcl_Obj *objPtr; /* nsName object with internal |
|
|
* representation to free */ |
|
|
{ |
|
|
register ResolvedNsName *resNamePtr = |
|
|
(ResolvedNsName *) objPtr->internalRep.otherValuePtr; |
|
|
Namespace *nsPtr; |
|
|
|
|
|
/* |
|
|
* Decrement the reference count of the namespace. If there are no |
|
|
* more references, free it up. |
|
|
*/ |
|
|
|
|
|
if (resNamePtr != NULL) { |
|
|
resNamePtr->refCount--; |
|
|
if (resNamePtr->refCount == 0) { |
|
|
|
|
|
/* |
|
|
* Decrement the reference count for the cached namespace. If |
|
|
* the namespace is dead, and there are no more references to |
|
|
* it, free it. |
|
|
*/ |
|
|
|
|
|
nsPtr = resNamePtr->nsPtr; |
|
|
nsPtr->refCount--; |
|
|
if ((nsPtr->refCount == 0) && (nsPtr->flags & NS_DEAD)) { |
|
|
NamespaceFree(nsPtr); |
|
|
} |
|
|
ckfree((char *) resNamePtr); |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* DupNsNameInternalRep -- |
|
|
* |
|
|
* Initializes the internal representation of a nsName object to a copy |
|
|
* of the internal representation of another nsName object. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* copyPtr's internal rep is set to refer to the same namespace |
|
|
* referenced by srcPtr's internal rep. Increments the ref count of |
|
|
* the ResolvedNsName structure used to hold the namespace reference. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
DupNsNameInternalRep(srcPtr, copyPtr) |
|
|
Tcl_Obj *srcPtr; /* Object with internal rep to copy. */ |
|
|
register Tcl_Obj *copyPtr; /* Object with internal rep to set. */ |
|
|
{ |
|
|
register ResolvedNsName *resNamePtr = |
|
|
(ResolvedNsName *) srcPtr->internalRep.otherValuePtr; |
|
|
|
|
|
copyPtr->internalRep.otherValuePtr = (VOID *) resNamePtr; |
|
|
if (resNamePtr != NULL) { |
|
|
resNamePtr->refCount++; |
|
|
} |
|
|
copyPtr->typePtr = &tclNsNameType; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* SetNsNameFromAny -- |
|
|
* |
|
|
* Attempt to generate a nsName internal representation for a |
|
|
* Tcl object. |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK if the value could be converted to a proper |
|
|
* namespace reference. Otherwise, it returns TCL_ERROR, along |
|
|
* with an error message in the interpreter's result object. |
|
|
* |
|
|
* Side effects: |
|
|
* If successful, the object is made a nsName object. Its internal rep |
|
|
* is set to point to a ResolvedNsName, which contains a cached pointer |
|
|
* to the Namespace. Reference counts are kept on both the |
|
|
* ResolvedNsName and the Namespace, so we can keep track of their |
|
|
* usage and free them when appropriate. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
SetNsNameFromAny(interp, objPtr) |
|
|
Tcl_Interp *interp; /* Points to the namespace in which to |
|
|
* resolve name. Also used for error |
|
|
* reporting if not NULL. */ |
|
|
register Tcl_Obj *objPtr; /* The object to convert. */ |
|
|
{ |
|
|
register Tcl_ObjType *oldTypePtr = objPtr->typePtr; |
|
|
char *name, *dummy; |
|
|
Namespace *nsPtr, *dummy1Ptr, *dummy2Ptr; |
|
|
register ResolvedNsName *resNamePtr; |
|
|
|
|
|
/* |
|
|
* Get the string representation. Make it up-to-date if necessary. |
|
|
*/ |
|
|
|
|
|
name = objPtr->bytes; |
|
|
if (name == NULL) { |
|
|
name = Tcl_GetString(objPtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
* Look for the namespace "name" in the current namespace. If there is |
|
|
* an error parsing the (possibly qualified) name, return an error. |
|
|
* If the namespace isn't found, we convert the object to an nsName |
|
|
* object with a NULL ResolvedNsName* internal rep. |
|
|
*/ |
|
|
|
|
|
TclGetNamespaceForQualName(interp, name, (Namespace *) NULL, |
|
|
FIND_ONLY_NS, &nsPtr, &dummy1Ptr, &dummy2Ptr, &dummy); |
|
|
|
|
|
/* |
|
|
* If we found a namespace, then create a new ResolvedNsName structure |
|
|
* that holds a reference to it. |
|
|
*/ |
|
|
|
|
|
if (nsPtr != NULL) { |
|
|
Namespace *currNsPtr = |
|
|
(Namespace *) Tcl_GetCurrentNamespace(interp); |
|
|
|
|
|
nsPtr->refCount++; |
|
|
resNamePtr = (ResolvedNsName *) ckalloc(sizeof(ResolvedNsName)); |
|
|
resNamePtr->nsPtr = nsPtr; |
|
|
resNamePtr->nsId = nsPtr->nsId; |
|
|
resNamePtr->refNsPtr = currNsPtr; |
|
|
resNamePtr->refCount = 1; |
|
|
} else { |
|
|
resNamePtr = NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Free the old internalRep before setting the new one. |
|
|
* We do this as late as possible to allow the conversion code |
|
|
* (in particular, Tcl_GetStringFromObj) to use that old internalRep. |
|
|
*/ |
|
|
|
|
|
if ((oldTypePtr != NULL) && (oldTypePtr->freeIntRepProc != NULL)) { |
|
|
oldTypePtr->freeIntRepProc(objPtr); |
|
|
} |
|
|
|
|
|
objPtr->internalRep.otherValuePtr = (VOID *) resNamePtr; |
|
|
objPtr->typePtr = &tclNsNameType; |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* UpdateStringOfNsName -- |
|
|
* |
|
|
* Updates the string representation for a nsName object. |
|
|
* Note: This procedure does not free an existing old string rep |
|
|
* so storage will be lost if this has not already been done. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The object's string is set to a copy of the fully qualified |
|
|
* namespace name. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
UpdateStringOfNsName(objPtr) |
|
|
register Tcl_Obj *objPtr; /* nsName object with string rep to update. */ |
|
|
{ |
|
|
ResolvedNsName *resNamePtr = |
|
|
(ResolvedNsName *) objPtr->internalRep.otherValuePtr; |
|
|
register Namespace *nsPtr; |
|
|
char *name = ""; |
|
|
int length; |
|
|
|
|
|
if ((resNamePtr != NULL) |
|
|
&& (resNamePtr->nsId == resNamePtr->nsPtr->nsId)) { |
|
|
nsPtr = resNamePtr->nsPtr; |
|
|
if (nsPtr->flags & NS_DEAD) { |
|
|
nsPtr = NULL; |
|
|
} |
|
|
if (nsPtr != NULL) { |
|
|
name = nsPtr->fullName; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* The following sets the string rep to an empty string on the heap |
|
|
* if the internal rep is NULL. |
|
|
*/ |
|
|
|
|
|
length = strlen(name); |
|
|
if (length == 0) { |
|
|
objPtr->bytes = tclEmptyStringRep; |
|
|
} else { |
|
|
objPtr->bytes = (char *) ckalloc((unsigned) (length + 1)); |
|
|
memcpy((VOID *) objPtr->bytes, (VOID *) name, (unsigned) length); |
|
|
objPtr->bytes[length] = '\0'; |
|
|
} |
|
|
objPtr->length = length; |
|
|
} |
|
|
|
|
|
|
|
|
/* $History: tclnamesp.c $ |
|
|
* |
|
|
* ***************** Version 1 ***************** |
|
|
* User: Dtashley Date: 1/02/01 Time: 1:31a |
|
|
* Created in $/IjuScripter, IjuConsole/Source/Tcl Base |
|
|
* Initial check-in. |
|
|
*/ |
|
|
|
|
|
/* End of TCLNAMESP.C */ |
|
| 1 |
|
/* $Header$ */ |
| 2 |
|
/* |
| 3 |
|
* tclNamesp.c -- |
| 4 |
|
* |
| 5 |
|
* Contains support for namespaces, which provide a separate context of |
| 6 |
|
* commands and global variables. The global :: namespace is the |
| 7 |
|
* traditional Tcl "global" scope. Other namespaces are created as |
| 8 |
|
* children of the global namespace. These other namespaces contain |
| 9 |
|
* special-purpose commands and variables for packages. |
| 10 |
|
* |
| 11 |
|
* Copyright (c) 1993-1997 Lucent Technologies. |
| 12 |
|
* Copyright (c) 1997 Sun Microsystems, Inc. |
| 13 |
|
* Copyright (c) 1998-1999 by Scriptics Corporation. |
| 14 |
|
* |
| 15 |
|
* Originally implemented by |
| 16 |
|
* Michael J. McLennan |
| 17 |
|
* Bell Labs Innovations for Lucent Technologies |
| 18 |
|
* mmclennan@lucent.com |
| 19 |
|
* |
| 20 |
|
* See the file "license.terms" for information on usage and redistribution |
| 21 |
|
* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| 22 |
|
* |
| 23 |
|
* RCS: @(#) $Id: tclnamesp.c,v 1.1.1.1 2001/06/13 04:43:37 dtashley Exp $ |
| 24 |
|
*/ |
| 25 |
|
|
| 26 |
|
#include "tclInt.h" |
| 27 |
|
|
| 28 |
|
/* |
| 29 |
|
* Flag passed to TclGetNamespaceForQualName to indicate that it should |
| 30 |
|
* search for a namespace rather than a command or variable inside a |
| 31 |
|
* namespace. Note that this flag's value must not conflict with the values |
| 32 |
|
* of TCL_GLOBAL_ONLY, TCL_NAMESPACE_ONLY, or CREATE_NS_IF_UNKNOWN. |
| 33 |
|
*/ |
| 34 |
|
|
| 35 |
|
#define FIND_ONLY_NS 0x1000 |
| 36 |
|
|
| 37 |
|
/* |
| 38 |
|
* Initial size of stack allocated space for tail list - used when resetting |
| 39 |
|
* shadowed command references in the functin: TclResetShadowedCmdRefs. |
| 40 |
|
*/ |
| 41 |
|
|
| 42 |
|
#define NUM_TRAIL_ELEMS 5 |
| 43 |
|
|
| 44 |
|
/* |
| 45 |
|
* Count of the number of namespaces created. This value is used as a |
| 46 |
|
* unique id for each namespace. |
| 47 |
|
*/ |
| 48 |
|
|
| 49 |
|
static long numNsCreated = 0; |
| 50 |
|
TCL_DECLARE_MUTEX(nsMutex) |
| 51 |
|
|
| 52 |
|
/* |
| 53 |
|
* This structure contains a cached pointer to a namespace that is the |
| 54 |
|
* result of resolving the namespace's name in some other namespace. It is |
| 55 |
|
* the internal representation for a nsName object. It contains the |
| 56 |
|
* pointer along with some information that is used to check the cached |
| 57 |
|
* pointer's validity. |
| 58 |
|
*/ |
| 59 |
|
|
| 60 |
|
typedef struct ResolvedNsName { |
| 61 |
|
Namespace *nsPtr; /* A cached namespace pointer. */ |
| 62 |
|
long nsId; /* nsPtr's unique namespace id. Used to |
| 63 |
|
* verify that nsPtr is still valid |
| 64 |
|
* (e.g., it's possible that the namespace |
| 65 |
|
* was deleted and a new one created at |
| 66 |
|
* the same address). */ |
| 67 |
|
Namespace *refNsPtr; /* Points to the namespace containing the |
| 68 |
|
* reference (not the namespace that |
| 69 |
|
* contains the referenced namespace). */ |
| 70 |
|
int refCount; /* Reference count: 1 for each nsName |
| 71 |
|
* object that has a pointer to this |
| 72 |
|
* ResolvedNsName structure as its internal |
| 73 |
|
* rep. This structure can be freed when |
| 74 |
|
* refCount becomes zero. */ |
| 75 |
|
} ResolvedNsName; |
| 76 |
|
|
| 77 |
|
/* |
| 78 |
|
* Declarations for procedures local to this file: |
| 79 |
|
*/ |
| 80 |
|
|
| 81 |
|
static void DeleteImportedCmd _ANSI_ARGS_(( |
| 82 |
|
ClientData clientData)); |
| 83 |
|
static void DupNsNameInternalRep _ANSI_ARGS_((Tcl_Obj *objPtr, |
| 84 |
|
Tcl_Obj *copyPtr)); |
| 85 |
|
static void FreeNsNameInternalRep _ANSI_ARGS_(( |
| 86 |
|
Tcl_Obj *objPtr)); |
| 87 |
|
static int GetNamespaceFromObj _ANSI_ARGS_(( |
| 88 |
|
Tcl_Interp *interp, Tcl_Obj *objPtr, |
| 89 |
|
Tcl_Namespace **nsPtrPtr)); |
| 90 |
|
static int InvokeImportedCmd _ANSI_ARGS_(( |
| 91 |
|
ClientData clientData, Tcl_Interp *interp, |
| 92 |
|
int objc, Tcl_Obj *CONST objv[])); |
| 93 |
|
static int NamespaceChildrenCmd _ANSI_ARGS_(( |
| 94 |
|
ClientData dummy, Tcl_Interp *interp, |
| 95 |
|
int objc, Tcl_Obj *CONST objv[])); |
| 96 |
|
static int NamespaceCodeCmd _ANSI_ARGS_(( |
| 97 |
|
ClientData dummy, Tcl_Interp *interp, |
| 98 |
|
int objc, Tcl_Obj *CONST objv[])); |
| 99 |
|
static int NamespaceCurrentCmd _ANSI_ARGS_(( |
| 100 |
|
ClientData dummy, Tcl_Interp *interp, |
| 101 |
|
int objc, Tcl_Obj *CONST objv[])); |
| 102 |
|
static int NamespaceDeleteCmd _ANSI_ARGS_(( |
| 103 |
|
ClientData dummy, Tcl_Interp *interp, |
| 104 |
|
int objc, Tcl_Obj *CONST objv[])); |
| 105 |
|
static int NamespaceEvalCmd _ANSI_ARGS_(( |
| 106 |
|
ClientData dummy, Tcl_Interp *interp, |
| 107 |
|
int objc, Tcl_Obj *CONST objv[])); |
| 108 |
|
static int NamespaceExportCmd _ANSI_ARGS_(( |
| 109 |
|
ClientData dummy, Tcl_Interp *interp, |
| 110 |
|
int objc, Tcl_Obj *CONST objv[])); |
| 111 |
|
static int NamespaceForgetCmd _ANSI_ARGS_(( |
| 112 |
|
ClientData dummy, Tcl_Interp *interp, |
| 113 |
|
int objc, Tcl_Obj *CONST objv[])); |
| 114 |
|
static void NamespaceFree _ANSI_ARGS_((Namespace *nsPtr)); |
| 115 |
|
static int NamespaceImportCmd _ANSI_ARGS_(( |
| 116 |
|
ClientData dummy, Tcl_Interp *interp, |
| 117 |
|
int objc, Tcl_Obj *CONST objv[])); |
| 118 |
|
static int NamespaceInscopeCmd _ANSI_ARGS_(( |
| 119 |
|
ClientData dummy, Tcl_Interp *interp, |
| 120 |
|
int objc, Tcl_Obj *CONST objv[])); |
| 121 |
|
static int NamespaceOriginCmd _ANSI_ARGS_(( |
| 122 |
|
ClientData dummy, Tcl_Interp *interp, |
| 123 |
|
int objc, Tcl_Obj *CONST objv[])); |
| 124 |
|
static int NamespaceParentCmd _ANSI_ARGS_(( |
| 125 |
|
ClientData dummy, Tcl_Interp *interp, |
| 126 |
|
int objc, Tcl_Obj *CONST objv[])); |
| 127 |
|
static int NamespaceQualifiersCmd _ANSI_ARGS_(( |
| 128 |
|
ClientData dummy, Tcl_Interp *interp, |
| 129 |
|
int objc, Tcl_Obj *CONST objv[])); |
| 130 |
|
static int NamespaceTailCmd _ANSI_ARGS_(( |
| 131 |
|
ClientData dummy, Tcl_Interp *interp, |
| 132 |
|
int objc, Tcl_Obj *CONST objv[])); |
| 133 |
|
static int NamespaceWhichCmd _ANSI_ARGS_(( |
| 134 |
|
ClientData dummy, Tcl_Interp *interp, |
| 135 |
|
int objc, Tcl_Obj *CONST objv[])); |
| 136 |
|
static int SetNsNameFromAny _ANSI_ARGS_(( |
| 137 |
|
Tcl_Interp *interp, Tcl_Obj *objPtr)); |
| 138 |
|
static void UpdateStringOfNsName _ANSI_ARGS_((Tcl_Obj *objPtr)); |
| 139 |
|
|
| 140 |
|
/* |
| 141 |
|
* This structure defines a Tcl object type that contains a |
| 142 |
|
* namespace reference. It is used in commands that take the |
| 143 |
|
* name of a namespace as an argument. The namespace reference |
| 144 |
|
* is resolved, and the result in cached in the object. |
| 145 |
|
*/ |
| 146 |
|
|
| 147 |
|
Tcl_ObjType tclNsNameType = { |
| 148 |
|
"nsName", /* the type's name */ |
| 149 |
|
FreeNsNameInternalRep, /* freeIntRepProc */ |
| 150 |
|
DupNsNameInternalRep, /* dupIntRepProc */ |
| 151 |
|
UpdateStringOfNsName, /* updateStringProc */ |
| 152 |
|
SetNsNameFromAny /* setFromAnyProc */ |
| 153 |
|
}; |
| 154 |
|
|
| 155 |
|
/* |
| 156 |
|
*---------------------------------------------------------------------- |
| 157 |
|
* |
| 158 |
|
* TclInitNamespaceSubsystem -- |
| 159 |
|
* |
| 160 |
|
* This procedure is called to initialize all the structures that |
| 161 |
|
* are used by namespaces on a per-process basis. |
| 162 |
|
* |
| 163 |
|
* Results: |
| 164 |
|
* None. |
| 165 |
|
* |
| 166 |
|
* Side effects: |
| 167 |
|
* The namespace object type is registered with the Tcl compiler. |
| 168 |
|
* |
| 169 |
|
*---------------------------------------------------------------------- |
| 170 |
|
*/ |
| 171 |
|
|
| 172 |
|
void |
| 173 |
|
TclInitNamespaceSubsystem() |
| 174 |
|
{ |
| 175 |
|
Tcl_RegisterObjType(&tclNsNameType); |
| 176 |
|
} |
| 177 |
|
|
| 178 |
|
/* |
| 179 |
|
*---------------------------------------------------------------------- |
| 180 |
|
* |
| 181 |
|
* Tcl_GetCurrentNamespace -- |
| 182 |
|
* |
| 183 |
|
* Returns a pointer to an interpreter's currently active namespace. |
| 184 |
|
* |
| 185 |
|
* Results: |
| 186 |
|
* Returns a pointer to the interpreter's current namespace. |
| 187 |
|
* |
| 188 |
|
* Side effects: |
| 189 |
|
* None. |
| 190 |
|
* |
| 191 |
|
*---------------------------------------------------------------------- |
| 192 |
|
*/ |
| 193 |
|
|
| 194 |
|
Tcl_Namespace * |
| 195 |
|
Tcl_GetCurrentNamespace(interp) |
| 196 |
|
register Tcl_Interp *interp; /* Interpreter whose current namespace is |
| 197 |
|
* being queried. */ |
| 198 |
|
{ |
| 199 |
|
register Interp *iPtr = (Interp *) interp; |
| 200 |
|
register Namespace *nsPtr; |
| 201 |
|
|
| 202 |
|
if (iPtr->varFramePtr != NULL) { |
| 203 |
|
nsPtr = iPtr->varFramePtr->nsPtr; |
| 204 |
|
} else { |
| 205 |
|
nsPtr = iPtr->globalNsPtr; |
| 206 |
|
} |
| 207 |
|
return (Tcl_Namespace *) nsPtr; |
| 208 |
|
} |
| 209 |
|
|
| 210 |
|
/* |
| 211 |
|
*---------------------------------------------------------------------- |
| 212 |
|
* |
| 213 |
|
* Tcl_GetGlobalNamespace -- |
| 214 |
|
* |
| 215 |
|
* Returns a pointer to an interpreter's global :: namespace. |
| 216 |
|
* |
| 217 |
|
* Results: |
| 218 |
|
* Returns a pointer to the specified interpreter's global namespace. |
| 219 |
|
* |
| 220 |
|
* Side effects: |
| 221 |
|
* None. |
| 222 |
|
* |
| 223 |
|
*---------------------------------------------------------------------- |
| 224 |
|
*/ |
| 225 |
|
|
| 226 |
|
Tcl_Namespace * |
| 227 |
|
Tcl_GetGlobalNamespace(interp) |
| 228 |
|
register Tcl_Interp *interp; /* Interpreter whose global namespace |
| 229 |
|
* should be returned. */ |
| 230 |
|
{ |
| 231 |
|
register Interp *iPtr = (Interp *) interp; |
| 232 |
|
|
| 233 |
|
return (Tcl_Namespace *) iPtr->globalNsPtr; |
| 234 |
|
} |
| 235 |
|
|
| 236 |
|
/* |
| 237 |
|
*---------------------------------------------------------------------- |
| 238 |
|
* |
| 239 |
|
* Tcl_PushCallFrame -- |
| 240 |
|
* |
| 241 |
|
* Pushes a new call frame onto the interpreter's Tcl call stack. |
| 242 |
|
* Called when executing a Tcl procedure or a "namespace eval" or |
| 243 |
|
* "namespace inscope" command. |
| 244 |
|
* |
| 245 |
|
* Results: |
| 246 |
|
* Returns TCL_OK if successful, or TCL_ERROR (along with an error |
| 247 |
|
* message in the interpreter's result object) if something goes wrong. |
| 248 |
|
* |
| 249 |
|
* Side effects: |
| 250 |
|
* Modifies the interpreter's Tcl call stack. |
| 251 |
|
* |
| 252 |
|
*---------------------------------------------------------------------- |
| 253 |
|
*/ |
| 254 |
|
|
| 255 |
|
int |
| 256 |
|
Tcl_PushCallFrame(interp, callFramePtr, namespacePtr, isProcCallFrame) |
| 257 |
|
Tcl_Interp *interp; /* Interpreter in which the new call frame |
| 258 |
|
* is to be pushed. */ |
| 259 |
|
Tcl_CallFrame *callFramePtr; /* Points to a call frame structure to |
| 260 |
|
* push. Storage for this has already been |
| 261 |
|
* allocated by the caller; typically this |
| 262 |
|
* is the address of a CallFrame structure |
| 263 |
|
* allocated on the caller's C stack. The |
| 264 |
|
* call frame will be initialized by this |
| 265 |
|
* procedure. The caller can pop the frame |
| 266 |
|
* later with Tcl_PopCallFrame, and it is |
| 267 |
|
* responsible for freeing the frame's |
| 268 |
|
* storage. */ |
| 269 |
|
Tcl_Namespace *namespacePtr; /* Points to the namespace in which the |
| 270 |
|
* frame will execute. If NULL, the |
| 271 |
|
* interpreter's current namespace will |
| 272 |
|
* be used. */ |
| 273 |
|
int isProcCallFrame; /* If nonzero, the frame represents a |
| 274 |
|
* called Tcl procedure and may have local |
| 275 |
|
* vars. Vars will ordinarily be looked up |
| 276 |
|
* in the frame. If new variables are |
| 277 |
|
* created, they will be created in the |
| 278 |
|
* frame. If 0, the frame is for a |
| 279 |
|
* "namespace eval" or "namespace inscope" |
| 280 |
|
* command and var references are treated |
| 281 |
|
* as references to namespace variables. */ |
| 282 |
|
{ |
| 283 |
|
Interp *iPtr = (Interp *) interp; |
| 284 |
|
register CallFrame *framePtr = (CallFrame *) callFramePtr; |
| 285 |
|
register Namespace *nsPtr; |
| 286 |
|
|
| 287 |
|
if (namespacePtr == NULL) { |
| 288 |
|
nsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
| 289 |
|
} else { |
| 290 |
|
nsPtr = (Namespace *) namespacePtr; |
| 291 |
|
if (nsPtr->flags & NS_DEAD) { |
| 292 |
|
panic("Trying to push call frame for dead namespace"); |
| 293 |
|
/*NOTREACHED*/ |
| 294 |
|
} |
| 295 |
|
} |
| 296 |
|
|
| 297 |
|
nsPtr->activationCount++; |
| 298 |
|
framePtr->nsPtr = nsPtr; |
| 299 |
|
framePtr->isProcCallFrame = isProcCallFrame; |
| 300 |
|
framePtr->objc = 0; |
| 301 |
|
framePtr->objv = NULL; |
| 302 |
|
framePtr->callerPtr = iPtr->framePtr; |
| 303 |
|
framePtr->callerVarPtr = iPtr->varFramePtr; |
| 304 |
|
if (iPtr->varFramePtr != NULL) { |
| 305 |
|
framePtr->level = (iPtr->varFramePtr->level + 1); |
| 306 |
|
} else { |
| 307 |
|
framePtr->level = 1; |
| 308 |
|
} |
| 309 |
|
framePtr->procPtr = NULL; /* no called procedure */ |
| 310 |
|
framePtr->varTablePtr = NULL; /* and no local variables */ |
| 311 |
|
framePtr->numCompiledLocals = 0; |
| 312 |
|
framePtr->compiledLocals = NULL; |
| 313 |
|
|
| 314 |
|
/* |
| 315 |
|
* Push the new call frame onto the interpreter's stack of procedure |
| 316 |
|
* call frames making it the current frame. |
| 317 |
|
*/ |
| 318 |
|
|
| 319 |
|
iPtr->framePtr = framePtr; |
| 320 |
|
iPtr->varFramePtr = framePtr; |
| 321 |
|
return TCL_OK; |
| 322 |
|
} |
| 323 |
|
|
| 324 |
|
/* |
| 325 |
|
*---------------------------------------------------------------------- |
| 326 |
|
* |
| 327 |
|
* Tcl_PopCallFrame -- |
| 328 |
|
* |
| 329 |
|
* Removes a call frame from the Tcl call stack for the interpreter. |
| 330 |
|
* Called to remove a frame previously pushed by Tcl_PushCallFrame. |
| 331 |
|
* |
| 332 |
|
* Results: |
| 333 |
|
* None. |
| 334 |
|
* |
| 335 |
|
* Side effects: |
| 336 |
|
* Modifies the call stack of the interpreter. Resets various fields of |
| 337 |
|
* the popped call frame. If a namespace has been deleted and |
| 338 |
|
* has no more activations on the call stack, the namespace is |
| 339 |
|
* destroyed. |
| 340 |
|
* |
| 341 |
|
*---------------------------------------------------------------------- |
| 342 |
|
*/ |
| 343 |
|
|
| 344 |
|
void |
| 345 |
|
Tcl_PopCallFrame(interp) |
| 346 |
|
Tcl_Interp* interp; /* Interpreter with call frame to pop. */ |
| 347 |
|
{ |
| 348 |
|
register Interp *iPtr = (Interp *) interp; |
| 349 |
|
register CallFrame *framePtr = iPtr->framePtr; |
| 350 |
|
int saveErrFlag; |
| 351 |
|
Namespace *nsPtr; |
| 352 |
|
|
| 353 |
|
/* |
| 354 |
|
* It's important to remove the call frame from the interpreter's stack |
| 355 |
|
* of call frames before deleting local variables, so that traces |
| 356 |
|
* invoked by the variable deletion don't see the partially-deleted |
| 357 |
|
* frame. |
| 358 |
|
*/ |
| 359 |
|
|
| 360 |
|
iPtr->framePtr = framePtr->callerPtr; |
| 361 |
|
iPtr->varFramePtr = framePtr->callerVarPtr; |
| 362 |
|
|
| 363 |
|
/* |
| 364 |
|
* Delete the local variables. As a hack, we save then restore the |
| 365 |
|
* ERR_IN_PROGRESS flag in the interpreter. The problem is that there |
| 366 |
|
* could be unset traces on the variables, which cause scripts to be |
| 367 |
|
* evaluated. This will clear the ERR_IN_PROGRESS flag, losing stack |
| 368 |
|
* trace information if the procedure was exiting with an error. The |
| 369 |
|
* code below preserves the flag. Unfortunately, that isn't really |
| 370 |
|
* enough: we really should preserve the errorInfo variable too |
| 371 |
|
* (otherwise a nested error in the trace script will trash errorInfo). |
| 372 |
|
* What's really needed is a general-purpose mechanism for saving and |
| 373 |
|
* restoring interpreter state. |
| 374 |
|
*/ |
| 375 |
|
|
| 376 |
|
saveErrFlag = (iPtr->flags & ERR_IN_PROGRESS); |
| 377 |
|
|
| 378 |
|
if (framePtr->varTablePtr != NULL) { |
| 379 |
|
TclDeleteVars(iPtr, framePtr->varTablePtr); |
| 380 |
|
ckfree((char *) framePtr->varTablePtr); |
| 381 |
|
framePtr->varTablePtr = NULL; |
| 382 |
|
} |
| 383 |
|
if (framePtr->numCompiledLocals > 0) { |
| 384 |
|
TclDeleteCompiledLocalVars(iPtr, framePtr); |
| 385 |
|
} |
| 386 |
|
|
| 387 |
|
iPtr->flags |= saveErrFlag; |
| 388 |
|
|
| 389 |
|
/* |
| 390 |
|
* Decrement the namespace's count of active call frames. If the |
| 391 |
|
* namespace is "dying" and there are no more active call frames, |
| 392 |
|
* call Tcl_DeleteNamespace to destroy it. |
| 393 |
|
*/ |
| 394 |
|
|
| 395 |
|
nsPtr = framePtr->nsPtr; |
| 396 |
|
nsPtr->activationCount--; |
| 397 |
|
if ((nsPtr->flags & NS_DYING) |
| 398 |
|
&& (nsPtr->activationCount == 0)) { |
| 399 |
|
Tcl_DeleteNamespace((Tcl_Namespace *) nsPtr); |
| 400 |
|
} |
| 401 |
|
framePtr->nsPtr = NULL; |
| 402 |
|
} |
| 403 |
|
|
| 404 |
|
/* |
| 405 |
|
*---------------------------------------------------------------------- |
| 406 |
|
* |
| 407 |
|
* Tcl_CreateNamespace -- |
| 408 |
|
* |
| 409 |
|
* Creates a new namespace with the given name. If there is no |
| 410 |
|
* active namespace (i.e., the interpreter is being initialized), |
| 411 |
|
* the global :: namespace is created and returned. |
| 412 |
|
* |
| 413 |
|
* Results: |
| 414 |
|
* Returns a pointer to the new namespace if successful. If the |
| 415 |
|
* namespace already exists or if another error occurs, this routine |
| 416 |
|
* returns NULL, along with an error message in the interpreter's |
| 417 |
|
* result object. |
| 418 |
|
* |
| 419 |
|
* Side effects: |
| 420 |
|
* If the name contains "::" qualifiers and a parent namespace does |
| 421 |
|
* not already exist, it is automatically created. |
| 422 |
|
* |
| 423 |
|
*---------------------------------------------------------------------- |
| 424 |
|
*/ |
| 425 |
|
|
| 426 |
|
Tcl_Namespace * |
| 427 |
|
Tcl_CreateNamespace(interp, name, clientData, deleteProc) |
| 428 |
|
Tcl_Interp *interp; /* Interpreter in which a new namespace |
| 429 |
|
* is being created. Also used for |
| 430 |
|
* error reporting. */ |
| 431 |
|
char *name; /* Name for the new namespace. May be a |
| 432 |
|
* qualified name with names of ancestor |
| 433 |
|
* namespaces separated by "::"s. */ |
| 434 |
|
ClientData clientData; /* One-word value to store with |
| 435 |
|
* namespace. */ |
| 436 |
|
Tcl_NamespaceDeleteProc *deleteProc; |
| 437 |
|
/* Procedure called to delete client |
| 438 |
|
* data when the namespace is deleted. |
| 439 |
|
* NULL if no procedure should be |
| 440 |
|
* called. */ |
| 441 |
|
{ |
| 442 |
|
Interp *iPtr = (Interp *) interp; |
| 443 |
|
register Namespace *nsPtr, *ancestorPtr; |
| 444 |
|
Namespace *parentPtr, *dummy1Ptr, *dummy2Ptr; |
| 445 |
|
Namespace *globalNsPtr = iPtr->globalNsPtr; |
| 446 |
|
char *simpleName; |
| 447 |
|
Tcl_HashEntry *entryPtr; |
| 448 |
|
Tcl_DString buffer1, buffer2; |
| 449 |
|
int newEntry; |
| 450 |
|
|
| 451 |
|
/* |
| 452 |
|
* If there is no active namespace, the interpreter is being |
| 453 |
|
* initialized. |
| 454 |
|
*/ |
| 455 |
|
|
| 456 |
|
if ((globalNsPtr == NULL) && (iPtr->varFramePtr == NULL)) { |
| 457 |
|
/* |
| 458 |
|
* Treat this namespace as the global namespace, and avoid |
| 459 |
|
* looking for a parent. |
| 460 |
|
*/ |
| 461 |
|
|
| 462 |
|
parentPtr = NULL; |
| 463 |
|
simpleName = ""; |
| 464 |
|
} else if (*name == '\0') { |
| 465 |
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
| 466 |
|
"can't create namespace \"\": only global namespace can have empty name", (char *) NULL); |
| 467 |
|
return NULL; |
| 468 |
|
} else { |
| 469 |
|
/* |
| 470 |
|
* Find the parent for the new namespace. |
| 471 |
|
*/ |
| 472 |
|
|
| 473 |
|
TclGetNamespaceForQualName(interp, name, (Namespace *) NULL, |
| 474 |
|
/*flags*/ (CREATE_NS_IF_UNKNOWN | TCL_LEAVE_ERR_MSG), |
| 475 |
|
&parentPtr, &dummy1Ptr, &dummy2Ptr, &simpleName); |
| 476 |
|
|
| 477 |
|
/* |
| 478 |
|
* If the unqualified name at the end is empty, there were trailing |
| 479 |
|
* "::"s after the namespace's name which we ignore. The new |
| 480 |
|
* namespace was already (recursively) created and is pointed to |
| 481 |
|
* by parentPtr. |
| 482 |
|
*/ |
| 483 |
|
|
| 484 |
|
if (*simpleName == '\0') { |
| 485 |
|
return (Tcl_Namespace *) parentPtr; |
| 486 |
|
} |
| 487 |
|
|
| 488 |
|
/* |
| 489 |
|
* Check for a bad namespace name and make sure that the name |
| 490 |
|
* does not already exist in the parent namespace. |
| 491 |
|
*/ |
| 492 |
|
|
| 493 |
|
if (Tcl_FindHashEntry(&parentPtr->childTable, simpleName) != NULL) { |
| 494 |
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
| 495 |
|
"can't create namespace \"", name, |
| 496 |
|
"\": already exists", (char *) NULL); |
| 497 |
|
return NULL; |
| 498 |
|
} |
| 499 |
|
} |
| 500 |
|
|
| 501 |
|
/* |
| 502 |
|
* Create the new namespace and root it in its parent. Increment the |
| 503 |
|
* count of namespaces created. |
| 504 |
|
*/ |
| 505 |
|
|
| 506 |
|
|
| 507 |
|
nsPtr = (Namespace *) ckalloc(sizeof(Namespace)); |
| 508 |
|
nsPtr->name = (char *) ckalloc((unsigned) (strlen(simpleName)+1)); |
| 509 |
|
strcpy(nsPtr->name, simpleName); |
| 510 |
|
nsPtr->fullName = NULL; /* set below */ |
| 511 |
|
nsPtr->clientData = clientData; |
| 512 |
|
nsPtr->deleteProc = deleteProc; |
| 513 |
|
nsPtr->parentPtr = parentPtr; |
| 514 |
|
Tcl_InitHashTable(&nsPtr->childTable, TCL_STRING_KEYS); |
| 515 |
|
Tcl_MutexLock(&nsMutex); |
| 516 |
|
numNsCreated++; |
| 517 |
|
nsPtr->nsId = numNsCreated; |
| 518 |
|
Tcl_MutexUnlock(&nsMutex); |
| 519 |
|
nsPtr->interp = interp; |
| 520 |
|
nsPtr->flags = 0; |
| 521 |
|
nsPtr->activationCount = 0; |
| 522 |
|
nsPtr->refCount = 0; |
| 523 |
|
Tcl_InitHashTable(&nsPtr->cmdTable, TCL_STRING_KEYS); |
| 524 |
|
Tcl_InitHashTable(&nsPtr->varTable, TCL_STRING_KEYS); |
| 525 |
|
nsPtr->exportArrayPtr = NULL; |
| 526 |
|
nsPtr->numExportPatterns = 0; |
| 527 |
|
nsPtr->maxExportPatterns = 0; |
| 528 |
|
nsPtr->cmdRefEpoch = 0; |
| 529 |
|
nsPtr->resolverEpoch = 0; |
| 530 |
|
nsPtr->cmdResProc = NULL; |
| 531 |
|
nsPtr->varResProc = NULL; |
| 532 |
|
nsPtr->compiledVarResProc = NULL; |
| 533 |
|
|
| 534 |
|
if (parentPtr != NULL) { |
| 535 |
|
entryPtr = Tcl_CreateHashEntry(&parentPtr->childTable, simpleName, |
| 536 |
|
&newEntry); |
| 537 |
|
Tcl_SetHashValue(entryPtr, (ClientData) nsPtr); |
| 538 |
|
} |
| 539 |
|
|
| 540 |
|
/* |
| 541 |
|
* Build the fully qualified name for this namespace. |
| 542 |
|
*/ |
| 543 |
|
|
| 544 |
|
Tcl_DStringInit(&buffer1); |
| 545 |
|
Tcl_DStringInit(&buffer2); |
| 546 |
|
for (ancestorPtr = nsPtr; ancestorPtr != NULL; |
| 547 |
|
ancestorPtr = ancestorPtr->parentPtr) { |
| 548 |
|
if (ancestorPtr != globalNsPtr) { |
| 549 |
|
Tcl_DStringAppend(&buffer1, "::", 2); |
| 550 |
|
Tcl_DStringAppend(&buffer1, ancestorPtr->name, -1); |
| 551 |
|
} |
| 552 |
|
Tcl_DStringAppend(&buffer1, Tcl_DStringValue(&buffer2), -1); |
| 553 |
|
|
| 554 |
|
Tcl_DStringSetLength(&buffer2, 0); |
| 555 |
|
Tcl_DStringAppend(&buffer2, Tcl_DStringValue(&buffer1), -1); |
| 556 |
|
Tcl_DStringSetLength(&buffer1, 0); |
| 557 |
|
} |
| 558 |
|
|
| 559 |
|
name = Tcl_DStringValue(&buffer2); |
| 560 |
|
nsPtr->fullName = (char *) ckalloc((unsigned) (strlen(name)+1)); |
| 561 |
|
strcpy(nsPtr->fullName, name); |
| 562 |
|
|
| 563 |
|
Tcl_DStringFree(&buffer1); |
| 564 |
|
Tcl_DStringFree(&buffer2); |
| 565 |
|
|
| 566 |
|
/* |
| 567 |
|
* Return a pointer to the new namespace. |
| 568 |
|
*/ |
| 569 |
|
|
| 570 |
|
return (Tcl_Namespace *) nsPtr; |
| 571 |
|
} |
| 572 |
|
|
| 573 |
|
/* |
| 574 |
|
*---------------------------------------------------------------------- |
| 575 |
|
* |
| 576 |
|
* Tcl_DeleteNamespace -- |
| 577 |
|
* |
| 578 |
|
* Deletes a namespace and all of the commands, variables, and other |
| 579 |
|
* namespaces within it. |
| 580 |
|
* |
| 581 |
|
* Results: |
| 582 |
|
* None. |
| 583 |
|
* |
| 584 |
|
* Side effects: |
| 585 |
|
* When a namespace is deleted, it is automatically removed as a |
| 586 |
|
* child of its parent namespace. Also, all its commands, variables |
| 587 |
|
* and child namespaces are deleted. |
| 588 |
|
* |
| 589 |
|
*---------------------------------------------------------------------- |
| 590 |
|
*/ |
| 591 |
|
|
| 592 |
|
void |
| 593 |
|
Tcl_DeleteNamespace(namespacePtr) |
| 594 |
|
Tcl_Namespace *namespacePtr; /* Points to the namespace to delete. */ |
| 595 |
|
{ |
| 596 |
|
register Namespace *nsPtr = (Namespace *) namespacePtr; |
| 597 |
|
Interp *iPtr = (Interp *) nsPtr->interp; |
| 598 |
|
Namespace *globalNsPtr = |
| 599 |
|
(Namespace *) Tcl_GetGlobalNamespace((Tcl_Interp *) iPtr); |
| 600 |
|
Tcl_HashEntry *entryPtr; |
| 601 |
|
|
| 602 |
|
/* |
| 603 |
|
* If the namespace is on the call frame stack, it is marked as "dying" |
| 604 |
|
* (NS_DYING is OR'd into its flags): the namespace can't be looked up |
| 605 |
|
* by name but its commands and variables are still usable by those |
| 606 |
|
* active call frames. When all active call frames referring to the |
| 607 |
|
* namespace have been popped from the Tcl stack, Tcl_PopCallFrame will |
| 608 |
|
* call this procedure again to delete everything in the namespace. |
| 609 |
|
* If no nsName objects refer to the namespace (i.e., if its refCount |
| 610 |
|
* is zero), its commands and variables are deleted and the storage for |
| 611 |
|
* its namespace structure is freed. Otherwise, if its refCount is |
| 612 |
|
* nonzero, the namespace's commands and variables are deleted but the |
| 613 |
|
* structure isn't freed. Instead, NS_DEAD is OR'd into the structure's |
| 614 |
|
* flags to allow the namespace resolution code to recognize that the |
| 615 |
|
* namespace is "deleted". The structure's storage is freed by |
| 616 |
|
* FreeNsNameInternalRep when its refCount reaches 0. |
| 617 |
|
*/ |
| 618 |
|
|
| 619 |
|
if (nsPtr->activationCount > 0) { |
| 620 |
|
nsPtr->flags |= NS_DYING; |
| 621 |
|
if (nsPtr->parentPtr != NULL) { |
| 622 |
|
entryPtr = Tcl_FindHashEntry(&nsPtr->parentPtr->childTable, |
| 623 |
|
nsPtr->name); |
| 624 |
|
if (entryPtr != NULL) { |
| 625 |
|
Tcl_DeleteHashEntry(entryPtr); |
| 626 |
|
} |
| 627 |
|
} |
| 628 |
|
nsPtr->parentPtr = NULL; |
| 629 |
|
} else { |
| 630 |
|
/* |
| 631 |
|
* Delete the namespace and everything in it. If this is the global |
| 632 |
|
* namespace, then clear it but don't free its storage unless the |
| 633 |
|
* interpreter is being torn down. |
| 634 |
|
*/ |
| 635 |
|
|
| 636 |
|
TclTeardownNamespace(nsPtr); |
| 637 |
|
|
| 638 |
|
if ((nsPtr != globalNsPtr) || (iPtr->flags & DELETED)) { |
| 639 |
|
/* |
| 640 |
|
* If this is the global namespace, then it may have residual |
| 641 |
|
* "errorInfo" and "errorCode" variables for errors that |
| 642 |
|
* occurred while it was being torn down. Try to clear the |
| 643 |
|
* variable list one last time. |
| 644 |
|
*/ |
| 645 |
|
|
| 646 |
|
TclDeleteVars((Interp *) nsPtr->interp, &nsPtr->varTable); |
| 647 |
|
|
| 648 |
|
Tcl_DeleteHashTable(&nsPtr->childTable); |
| 649 |
|
Tcl_DeleteHashTable(&nsPtr->cmdTable); |
| 650 |
|
|
| 651 |
|
/* |
| 652 |
|
* If the reference count is 0, then discard the namespace. |
| 653 |
|
* Otherwise, mark it as "dead" so that it can't be used. |
| 654 |
|
*/ |
| 655 |
|
|
| 656 |
|
if (nsPtr->refCount == 0) { |
| 657 |
|
NamespaceFree(nsPtr); |
| 658 |
|
} else { |
| 659 |
|
nsPtr->flags |= NS_DEAD; |
| 660 |
|
} |
| 661 |
|
} |
| 662 |
|
} |
| 663 |
|
} |
| 664 |
|
|
| 665 |
|
/* |
| 666 |
|
*---------------------------------------------------------------------- |
| 667 |
|
* |
| 668 |
|
* TclTeardownNamespace -- |
| 669 |
|
* |
| 670 |
|
* Used internally to dismantle and unlink a namespace when it is |
| 671 |
|
* deleted. Divorces the namespace from its parent, and deletes all |
| 672 |
|
* commands, variables, and child namespaces. |
| 673 |
|
* |
| 674 |
|
* This is kept separate from Tcl_DeleteNamespace so that the global |
| 675 |
|
* namespace can be handled specially. Global variables like |
| 676 |
|
* "errorInfo" and "errorCode" need to remain intact while other |
| 677 |
|
* namespaces and commands are torn down, in case any errors occur. |
| 678 |
|
* |
| 679 |
|
* Results: |
| 680 |
|
* None. |
| 681 |
|
* |
| 682 |
|
* Side effects: |
| 683 |
|
* Removes this namespace from its parent's child namespace hashtable. |
| 684 |
|
* Deletes all commands, variables and namespaces in this namespace. |
| 685 |
|
* If this is the global namespace, the "errorInfo" and "errorCode" |
| 686 |
|
* variables are left alone and deleted later. |
| 687 |
|
* |
| 688 |
|
*---------------------------------------------------------------------- |
| 689 |
|
*/ |
| 690 |
|
|
| 691 |
|
void |
| 692 |
|
TclTeardownNamespace(nsPtr) |
| 693 |
|
register Namespace *nsPtr; /* Points to the namespace to be dismantled |
| 694 |
|
* and unlinked from its parent. */ |
| 695 |
|
{ |
| 696 |
|
Interp *iPtr = (Interp *) nsPtr->interp; |
| 697 |
|
register Tcl_HashEntry *entryPtr; |
| 698 |
|
Tcl_HashSearch search; |
| 699 |
|
Tcl_Namespace *childNsPtr; |
| 700 |
|
Tcl_Command cmd; |
| 701 |
|
Namespace *globalNsPtr = |
| 702 |
|
(Namespace *) Tcl_GetGlobalNamespace((Tcl_Interp *) iPtr); |
| 703 |
|
int i; |
| 704 |
|
|
| 705 |
|
/* |
| 706 |
|
* Start by destroying the namespace's variable table, |
| 707 |
|
* since variables might trigger traces. |
| 708 |
|
*/ |
| 709 |
|
|
| 710 |
|
if (nsPtr == globalNsPtr) { |
| 711 |
|
/* |
| 712 |
|
* This is the global namespace, so be careful to preserve the |
| 713 |
|
* "errorInfo" and "errorCode" variables. These might be needed |
| 714 |
|
* later on if errors occur while deleting commands. We are careful |
| 715 |
|
* to destroy and recreate the "errorInfo" and "errorCode" |
| 716 |
|
* variables, in case they had any traces on them. |
| 717 |
|
*/ |
| 718 |
|
|
| 719 |
|
char *str, *errorInfoStr, *errorCodeStr; |
| 720 |
|
|
| 721 |
|
str = Tcl_GetVar((Tcl_Interp *) iPtr, "errorInfo", TCL_GLOBAL_ONLY); |
| 722 |
|
if (str != NULL) { |
| 723 |
|
errorInfoStr = ckalloc((unsigned) (strlen(str)+1)); |
| 724 |
|
strcpy(errorInfoStr, str); |
| 725 |
|
} else { |
| 726 |
|
errorInfoStr = NULL; |
| 727 |
|
} |
| 728 |
|
|
| 729 |
|
str = Tcl_GetVar((Tcl_Interp *) iPtr, "errorCode", TCL_GLOBAL_ONLY); |
| 730 |
|
if (str != NULL) { |
| 731 |
|
errorCodeStr = ckalloc((unsigned) (strlen(str)+1)); |
| 732 |
|
strcpy(errorCodeStr, str); |
| 733 |
|
} else { |
| 734 |
|
errorCodeStr = NULL; |
| 735 |
|
} |
| 736 |
|
|
| 737 |
|
TclDeleteVars(iPtr, &nsPtr->varTable); |
| 738 |
|
Tcl_InitHashTable(&nsPtr->varTable, TCL_STRING_KEYS); |
| 739 |
|
|
| 740 |
|
if (errorInfoStr != NULL) { |
| 741 |
|
Tcl_SetVar((Tcl_Interp *) iPtr, "errorInfo", errorInfoStr, |
| 742 |
|
TCL_GLOBAL_ONLY); |
| 743 |
|
ckfree(errorInfoStr); |
| 744 |
|
} |
| 745 |
|
if (errorCodeStr != NULL) { |
| 746 |
|
Tcl_SetVar((Tcl_Interp *) iPtr, "errorCode", errorCodeStr, |
| 747 |
|
TCL_GLOBAL_ONLY); |
| 748 |
|
ckfree(errorCodeStr); |
| 749 |
|
} |
| 750 |
|
} else { |
| 751 |
|
/* |
| 752 |
|
* Variable table should be cleared but not freed! TclDeleteVars |
| 753 |
|
* frees it, so we reinitialize it afterwards. |
| 754 |
|
*/ |
| 755 |
|
|
| 756 |
|
TclDeleteVars(iPtr, &nsPtr->varTable); |
| 757 |
|
Tcl_InitHashTable(&nsPtr->varTable, TCL_STRING_KEYS); |
| 758 |
|
} |
| 759 |
|
|
| 760 |
|
/* |
| 761 |
|
* Remove the namespace from its parent's child hashtable. |
| 762 |
|
*/ |
| 763 |
|
|
| 764 |
|
if (nsPtr->parentPtr != NULL) { |
| 765 |
|
entryPtr = Tcl_FindHashEntry(&nsPtr->parentPtr->childTable, |
| 766 |
|
nsPtr->name); |
| 767 |
|
if (entryPtr != NULL) { |
| 768 |
|
Tcl_DeleteHashEntry(entryPtr); |
| 769 |
|
} |
| 770 |
|
} |
| 771 |
|
nsPtr->parentPtr = NULL; |
| 772 |
|
|
| 773 |
|
/* |
| 774 |
|
* Delete all the child namespaces. |
| 775 |
|
* |
| 776 |
|
* BE CAREFUL: When each child is deleted, it will divorce |
| 777 |
|
* itself from its parent. You can't traverse a hash table |
| 778 |
|
* properly if its elements are being deleted. We use only |
| 779 |
|
* the Tcl_FirstHashEntry function to be safe. |
| 780 |
|
*/ |
| 781 |
|
|
| 782 |
|
for (entryPtr = Tcl_FirstHashEntry(&nsPtr->childTable, &search); |
| 783 |
|
entryPtr != NULL; |
| 784 |
|
entryPtr = Tcl_FirstHashEntry(&nsPtr->childTable, &search)) { |
| 785 |
|
childNsPtr = (Tcl_Namespace *) Tcl_GetHashValue(entryPtr); |
| 786 |
|
Tcl_DeleteNamespace(childNsPtr); |
| 787 |
|
} |
| 788 |
|
|
| 789 |
|
/* |
| 790 |
|
* Delete all commands in this namespace. Be careful when traversing the |
| 791 |
|
* hash table: when each command is deleted, it removes itself from the |
| 792 |
|
* command table. |
| 793 |
|
*/ |
| 794 |
|
|
| 795 |
|
for (entryPtr = Tcl_FirstHashEntry(&nsPtr->cmdTable, &search); |
| 796 |
|
entryPtr != NULL; |
| 797 |
|
entryPtr = Tcl_FirstHashEntry(&nsPtr->cmdTable, &search)) { |
| 798 |
|
cmd = (Tcl_Command) Tcl_GetHashValue(entryPtr); |
| 799 |
|
Tcl_DeleteCommandFromToken((Tcl_Interp *) iPtr, cmd); |
| 800 |
|
} |
| 801 |
|
Tcl_DeleteHashTable(&nsPtr->cmdTable); |
| 802 |
|
Tcl_InitHashTable(&nsPtr->cmdTable, TCL_STRING_KEYS); |
| 803 |
|
|
| 804 |
|
/* |
| 805 |
|
* Free the namespace's export pattern array. |
| 806 |
|
*/ |
| 807 |
|
|
| 808 |
|
if (nsPtr->exportArrayPtr != NULL) { |
| 809 |
|
for (i = 0; i < nsPtr->numExportPatterns; i++) { |
| 810 |
|
ckfree(nsPtr->exportArrayPtr[i]); |
| 811 |
|
} |
| 812 |
|
ckfree((char *) nsPtr->exportArrayPtr); |
| 813 |
|
nsPtr->exportArrayPtr = NULL; |
| 814 |
|
nsPtr->numExportPatterns = 0; |
| 815 |
|
nsPtr->maxExportPatterns = 0; |
| 816 |
|
} |
| 817 |
|
|
| 818 |
|
/* |
| 819 |
|
* Free any client data associated with the namespace. |
| 820 |
|
*/ |
| 821 |
|
|
| 822 |
|
if (nsPtr->deleteProc != NULL) { |
| 823 |
|
(*nsPtr->deleteProc)(nsPtr->clientData); |
| 824 |
|
} |
| 825 |
|
nsPtr->deleteProc = NULL; |
| 826 |
|
nsPtr->clientData = NULL; |
| 827 |
|
|
| 828 |
|
/* |
| 829 |
|
* Reset the namespace's id field to ensure that this namespace won't |
| 830 |
|
* be interpreted as valid by, e.g., the cache validation code for |
| 831 |
|
* cached command references in Tcl_GetCommandFromObj. |
| 832 |
|
*/ |
| 833 |
|
|
| 834 |
|
nsPtr->nsId = 0; |
| 835 |
|
} |
| 836 |
|
|
| 837 |
|
/* |
| 838 |
|
*---------------------------------------------------------------------- |
| 839 |
|
* |
| 840 |
|
* NamespaceFree -- |
| 841 |
|
* |
| 842 |
|
* Called after a namespace has been deleted, when its |
| 843 |
|
* reference count reaches 0. Frees the data structure |
| 844 |
|
* representing the namespace. |
| 845 |
|
* |
| 846 |
|
* Results: |
| 847 |
|
* None. |
| 848 |
|
* |
| 849 |
|
* Side effects: |
| 850 |
|
* None. |
| 851 |
|
* |
| 852 |
|
*---------------------------------------------------------------------- |
| 853 |
|
*/ |
| 854 |
|
|
| 855 |
|
static void |
| 856 |
|
NamespaceFree(nsPtr) |
| 857 |
|
register Namespace *nsPtr; /* Points to the namespace to free. */ |
| 858 |
|
{ |
| 859 |
|
/* |
| 860 |
|
* Most of the namespace's contents are freed when the namespace is |
| 861 |
|
* deleted by Tcl_DeleteNamespace. All that remains is to free its names |
| 862 |
|
* (for error messages), and the structure itself. |
| 863 |
|
*/ |
| 864 |
|
|
| 865 |
|
ckfree(nsPtr->name); |
| 866 |
|
ckfree(nsPtr->fullName); |
| 867 |
|
|
| 868 |
|
ckfree((char *) nsPtr); |
| 869 |
|
} |
| 870 |
|
|
| 871 |
|
|
| 872 |
|
/* |
| 873 |
|
*---------------------------------------------------------------------- |
| 874 |
|
* |
| 875 |
|
* Tcl_Export -- |
| 876 |
|
* |
| 877 |
|
* Makes all the commands matching a pattern available to later be |
| 878 |
|
* imported from the namespace specified by namespacePtr (or the |
| 879 |
|
* current namespace if namespacePtr is NULL). The specified pattern is |
| 880 |
|
* appended onto the namespace's export pattern list, which is |
| 881 |
|
* optionally cleared beforehand. |
| 882 |
|
* |
| 883 |
|
* Results: |
| 884 |
|
* Returns TCL_OK if successful, or TCL_ERROR (along with an error |
| 885 |
|
* message in the interpreter's result) if something goes wrong. |
| 886 |
|
* |
| 887 |
|
* Side effects: |
| 888 |
|
* Appends the export pattern onto the namespace's export list. |
| 889 |
|
* Optionally reset the namespace's export pattern list. |
| 890 |
|
* |
| 891 |
|
*---------------------------------------------------------------------- |
| 892 |
|
*/ |
| 893 |
|
|
| 894 |
|
int |
| 895 |
|
Tcl_Export(interp, namespacePtr, pattern, resetListFirst) |
| 896 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 897 |
|
Tcl_Namespace *namespacePtr; /* Points to the namespace from which |
| 898 |
|
* commands are to be exported. NULL for |
| 899 |
|
* the current namespace. */ |
| 900 |
|
char *pattern; /* String pattern indicating which commands |
| 901 |
|
* to export. This pattern may not include |
| 902 |
|
* any namespace qualifiers; only commands |
| 903 |
|
* in the specified namespace may be |
| 904 |
|
* exported. */ |
| 905 |
|
int resetListFirst; /* If nonzero, resets the namespace's |
| 906 |
|
* export list before appending. |
| 907 |
|
* If 0, return an error if an imported |
| 908 |
|
* cmd conflicts with an existing one. */ |
| 909 |
|
{ |
| 910 |
|
#define INIT_EXPORT_PATTERNS 5 |
| 911 |
|
Namespace *nsPtr, *exportNsPtr, *dummyPtr; |
| 912 |
|
Namespace *currNsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
| 913 |
|
char *simplePattern, *patternCpy; |
| 914 |
|
int neededElems, len, i; |
| 915 |
|
|
| 916 |
|
/* |
| 917 |
|
* If the specified namespace is NULL, use the current namespace. |
| 918 |
|
*/ |
| 919 |
|
|
| 920 |
|
if (namespacePtr == NULL) { |
| 921 |
|
nsPtr = (Namespace *) currNsPtr; |
| 922 |
|
} else { |
| 923 |
|
nsPtr = (Namespace *) namespacePtr; |
| 924 |
|
} |
| 925 |
|
|
| 926 |
|
/* |
| 927 |
|
* If resetListFirst is true (nonzero), clear the namespace's export |
| 928 |
|
* pattern list. |
| 929 |
|
*/ |
| 930 |
|
|
| 931 |
|
if (resetListFirst) { |
| 932 |
|
if (nsPtr->exportArrayPtr != NULL) { |
| 933 |
|
for (i = 0; i < nsPtr->numExportPatterns; i++) { |
| 934 |
|
ckfree(nsPtr->exportArrayPtr[i]); |
| 935 |
|
} |
| 936 |
|
ckfree((char *) nsPtr->exportArrayPtr); |
| 937 |
|
nsPtr->exportArrayPtr = NULL; |
| 938 |
|
nsPtr->numExportPatterns = 0; |
| 939 |
|
nsPtr->maxExportPatterns = 0; |
| 940 |
|
} |
| 941 |
|
} |
| 942 |
|
|
| 943 |
|
/* |
| 944 |
|
* Check that the pattern doesn't have namespace qualifiers. |
| 945 |
|
*/ |
| 946 |
|
|
| 947 |
|
TclGetNamespaceForQualName(interp, pattern, nsPtr, |
| 948 |
|
/*flags*/ TCL_LEAVE_ERR_MSG, &exportNsPtr, &dummyPtr, |
| 949 |
|
&dummyPtr, &simplePattern); |
| 950 |
|
|
| 951 |
|
if ((exportNsPtr != nsPtr) || (strcmp(pattern, simplePattern) != 0)) { |
| 952 |
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
| 953 |
|
"invalid export pattern \"", pattern, |
| 954 |
|
"\": pattern can't specify a namespace", |
| 955 |
|
(char *) NULL); |
| 956 |
|
return TCL_ERROR; |
| 957 |
|
} |
| 958 |
|
|
| 959 |
|
/* |
| 960 |
|
* Make sure that we don't already have the pattern in the array |
| 961 |
|
*/ |
| 962 |
|
if (nsPtr->exportArrayPtr != NULL) { |
| 963 |
|
for (i = 0; i < nsPtr->numExportPatterns; i++) { |
| 964 |
|
if (strcmp(pattern, nsPtr->exportArrayPtr[i]) == 0) { |
| 965 |
|
/* |
| 966 |
|
* The pattern already exists in the list |
| 967 |
|
*/ |
| 968 |
|
return TCL_OK; |
| 969 |
|
} |
| 970 |
|
} |
| 971 |
|
} |
| 972 |
|
|
| 973 |
|
/* |
| 974 |
|
* Make sure there is room in the namespace's pattern array for the |
| 975 |
|
* new pattern. |
| 976 |
|
*/ |
| 977 |
|
|
| 978 |
|
neededElems = nsPtr->numExportPatterns + 1; |
| 979 |
|
if (nsPtr->exportArrayPtr == NULL) { |
| 980 |
|
nsPtr->exportArrayPtr = (char **) |
| 981 |
|
ckalloc((unsigned) (INIT_EXPORT_PATTERNS * sizeof(char *))); |
| 982 |
|
nsPtr->numExportPatterns = 0; |
| 983 |
|
nsPtr->maxExportPatterns = INIT_EXPORT_PATTERNS; |
| 984 |
|
} else if (neededElems > nsPtr->maxExportPatterns) { |
| 985 |
|
int numNewElems = 2 * nsPtr->maxExportPatterns; |
| 986 |
|
size_t currBytes = nsPtr->numExportPatterns * sizeof(char *); |
| 987 |
|
size_t newBytes = numNewElems * sizeof(char *); |
| 988 |
|
char **newPtr = (char **) ckalloc((unsigned) newBytes); |
| 989 |
|
|
| 990 |
|
memcpy((VOID *) newPtr, (VOID *) nsPtr->exportArrayPtr, |
| 991 |
|
currBytes); |
| 992 |
|
ckfree((char *) nsPtr->exportArrayPtr); |
| 993 |
|
nsPtr->exportArrayPtr = (char **) newPtr; |
| 994 |
|
nsPtr->maxExportPatterns = numNewElems; |
| 995 |
|
} |
| 996 |
|
|
| 997 |
|
/* |
| 998 |
|
* Add the pattern to the namespace's array of export patterns. |
| 999 |
|
*/ |
| 1000 |
|
|
| 1001 |
|
len = strlen(pattern); |
| 1002 |
|
patternCpy = (char *) ckalloc((unsigned) (len + 1)); |
| 1003 |
|
strcpy(patternCpy, pattern); |
| 1004 |
|
|
| 1005 |
|
nsPtr->exportArrayPtr[nsPtr->numExportPatterns] = patternCpy; |
| 1006 |
|
nsPtr->numExportPatterns++; |
| 1007 |
|
return TCL_OK; |
| 1008 |
|
#undef INIT_EXPORT_PATTERNS |
| 1009 |
|
} |
| 1010 |
|
|
| 1011 |
|
/* |
| 1012 |
|
*---------------------------------------------------------------------- |
| 1013 |
|
* |
| 1014 |
|
* Tcl_AppendExportList -- |
| 1015 |
|
* |
| 1016 |
|
* Appends onto the argument object the list of export patterns for the |
| 1017 |
|
* specified namespace. |
| 1018 |
|
* |
| 1019 |
|
* Results: |
| 1020 |
|
* The return value is normally TCL_OK; in this case the object |
| 1021 |
|
* referenced by objPtr has each export pattern appended to it. If an |
| 1022 |
|
* error occurs, TCL_ERROR is returned and the interpreter's result |
| 1023 |
|
* holds an error message. |
| 1024 |
|
* |
| 1025 |
|
* Side effects: |
| 1026 |
|
* If necessary, the object referenced by objPtr is converted into |
| 1027 |
|
* a list object. |
| 1028 |
|
* |
| 1029 |
|
*---------------------------------------------------------------------- |
| 1030 |
|
*/ |
| 1031 |
|
|
| 1032 |
|
int |
| 1033 |
|
Tcl_AppendExportList(interp, namespacePtr, objPtr) |
| 1034 |
|
Tcl_Interp *interp; /* Interpreter used for error reporting. */ |
| 1035 |
|
Tcl_Namespace *namespacePtr; /* Points to the namespace whose export |
| 1036 |
|
* pattern list is appended onto objPtr. |
| 1037 |
|
* NULL for the current namespace. */ |
| 1038 |
|
Tcl_Obj *objPtr; /* Points to the Tcl object onto which the |
| 1039 |
|
* export pattern list is appended. */ |
| 1040 |
|
{ |
| 1041 |
|
Namespace *nsPtr; |
| 1042 |
|
int i, result; |
| 1043 |
|
|
| 1044 |
|
/* |
| 1045 |
|
* If the specified namespace is NULL, use the current namespace. |
| 1046 |
|
*/ |
| 1047 |
|
|
| 1048 |
|
if (namespacePtr == NULL) { |
| 1049 |
|
nsPtr = (Namespace *) (Namespace *) Tcl_GetCurrentNamespace(interp); |
| 1050 |
|
} else { |
| 1051 |
|
nsPtr = (Namespace *) namespacePtr; |
| 1052 |
|
} |
| 1053 |
|
|
| 1054 |
|
/* |
| 1055 |
|
* Append the export pattern list onto objPtr. |
| 1056 |
|
*/ |
| 1057 |
|
|
| 1058 |
|
for (i = 0; i < nsPtr->numExportPatterns; i++) { |
| 1059 |
|
result = Tcl_ListObjAppendElement(interp, objPtr, |
| 1060 |
|
Tcl_NewStringObj(nsPtr->exportArrayPtr[i], -1)); |
| 1061 |
|
if (result != TCL_OK) { |
| 1062 |
|
return result; |
| 1063 |
|
} |
| 1064 |
|
} |
| 1065 |
|
return TCL_OK; |
| 1066 |
|
} |
| 1067 |
|
|
| 1068 |
|
/* |
| 1069 |
|
*---------------------------------------------------------------------- |
| 1070 |
|
* |
| 1071 |
|
* Tcl_Import -- |
| 1072 |
|
* |
| 1073 |
|
* Imports all of the commands matching a pattern into the namespace |
| 1074 |
|
* specified by namespacePtr (or the current namespace if contextNsPtr |
| 1075 |
|
* is NULL). This is done by creating a new command (the "imported |
| 1076 |
|
* command") that points to the real command in its original namespace. |
| 1077 |
|
* |
| 1078 |
|
* If matching commands are on the autoload path but haven't been |
| 1079 |
|
* loaded yet, this command forces them to be loaded, then creates |
| 1080 |
|
* the links to them. |
| 1081 |
|
* |
| 1082 |
|
* Results: |
| 1083 |
|
* Returns TCL_OK if successful, or TCL_ERROR (along with an error |
| 1084 |
|
* message in the interpreter's result) if something goes wrong. |
| 1085 |
|
* |
| 1086 |
|
* Side effects: |
| 1087 |
|
* Creates new commands in the importing namespace. These indirect |
| 1088 |
|
* calls back to the real command and are deleted if the real commands |
| 1089 |
|
* are deleted. |
| 1090 |
|
* |
| 1091 |
|
*---------------------------------------------------------------------- |
| 1092 |
|
*/ |
| 1093 |
|
|
| 1094 |
|
int |
| 1095 |
|
Tcl_Import(interp, namespacePtr, pattern, allowOverwrite) |
| 1096 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 1097 |
|
Tcl_Namespace *namespacePtr; /* Points to the namespace into which the |
| 1098 |
|
* commands are to be imported. NULL for |
| 1099 |
|
* the current namespace. */ |
| 1100 |
|
char *pattern; /* String pattern indicating which commands |
| 1101 |
|
* to import. This pattern should be |
| 1102 |
|
* qualified by the name of the namespace |
| 1103 |
|
* from which to import the command(s). */ |
| 1104 |
|
int allowOverwrite; /* If nonzero, allow existing commands to |
| 1105 |
|
* be overwritten by imported commands. |
| 1106 |
|
* If 0, return an error if an imported |
| 1107 |
|
* cmd conflicts with an existing one. */ |
| 1108 |
|
{ |
| 1109 |
|
Interp *iPtr = (Interp *) interp; |
| 1110 |
|
Namespace *nsPtr, *importNsPtr, *dummyPtr; |
| 1111 |
|
Namespace *currNsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
| 1112 |
|
char *simplePattern, *cmdName; |
| 1113 |
|
register Tcl_HashEntry *hPtr; |
| 1114 |
|
Tcl_HashSearch search; |
| 1115 |
|
Command *cmdPtr, *realCmdPtr; |
| 1116 |
|
ImportRef *refPtr; |
| 1117 |
|
Tcl_Command autoCmd, importedCmd; |
| 1118 |
|
ImportedCmdData *dataPtr; |
| 1119 |
|
int wasExported, i, result; |
| 1120 |
|
|
| 1121 |
|
/* |
| 1122 |
|
* If the specified namespace is NULL, use the current namespace. |
| 1123 |
|
*/ |
| 1124 |
|
|
| 1125 |
|
if (namespacePtr == NULL) { |
| 1126 |
|
nsPtr = (Namespace *) currNsPtr; |
| 1127 |
|
} else { |
| 1128 |
|
nsPtr = (Namespace *) namespacePtr; |
| 1129 |
|
} |
| 1130 |
|
|
| 1131 |
|
/* |
| 1132 |
|
* First, invoke the "auto_import" command with the pattern |
| 1133 |
|
* being imported. This command is part of the Tcl library. |
| 1134 |
|
* It looks for imported commands in autoloaded libraries and |
| 1135 |
|
* loads them in. That way, they will be found when we try |
| 1136 |
|
* to create links below. |
| 1137 |
|
*/ |
| 1138 |
|
|
| 1139 |
|
autoCmd = Tcl_FindCommand(interp, "auto_import", |
| 1140 |
|
(Tcl_Namespace *) NULL, /*flags*/ TCL_GLOBAL_ONLY); |
| 1141 |
|
|
| 1142 |
|
if (autoCmd != NULL) { |
| 1143 |
|
Tcl_Obj *objv[2]; |
| 1144 |
|
|
| 1145 |
|
objv[0] = Tcl_NewStringObj("auto_import", -1); |
| 1146 |
|
Tcl_IncrRefCount(objv[0]); |
| 1147 |
|
objv[1] = Tcl_NewStringObj(pattern, -1); |
| 1148 |
|
Tcl_IncrRefCount(objv[1]); |
| 1149 |
|
|
| 1150 |
|
cmdPtr = (Command *) autoCmd; |
| 1151 |
|
result = (*cmdPtr->objProc)(cmdPtr->objClientData, interp, |
| 1152 |
|
2, objv); |
| 1153 |
|
|
| 1154 |
|
Tcl_DecrRefCount(objv[0]); |
| 1155 |
|
Tcl_DecrRefCount(objv[1]); |
| 1156 |
|
|
| 1157 |
|
if (result != TCL_OK) { |
| 1158 |
|
return TCL_ERROR; |
| 1159 |
|
} |
| 1160 |
|
Tcl_ResetResult(interp); |
| 1161 |
|
} |
| 1162 |
|
|
| 1163 |
|
/* |
| 1164 |
|
* From the pattern, find the namespace from which we are importing |
| 1165 |
|
* and get the simple pattern (no namespace qualifiers or ::'s) at |
| 1166 |
|
* the end. |
| 1167 |
|
*/ |
| 1168 |
|
|
| 1169 |
|
if (strlen(pattern) == 0) { |
| 1170 |
|
Tcl_SetStringObj(Tcl_GetObjResult(interp), |
| 1171 |
|
"empty import pattern", -1); |
| 1172 |
|
return TCL_ERROR; |
| 1173 |
|
} |
| 1174 |
|
TclGetNamespaceForQualName(interp, pattern, nsPtr, |
| 1175 |
|
/*flags*/ TCL_LEAVE_ERR_MSG, &importNsPtr, &dummyPtr, |
| 1176 |
|
&dummyPtr, &simplePattern); |
| 1177 |
|
|
| 1178 |
|
if (importNsPtr == NULL) { |
| 1179 |
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
| 1180 |
|
"unknown namespace in import pattern \"", |
| 1181 |
|
pattern, "\"", (char *) NULL); |
| 1182 |
|
return TCL_ERROR; |
| 1183 |
|
} |
| 1184 |
|
if (importNsPtr == nsPtr) { |
| 1185 |
|
if (pattern == simplePattern) { |
| 1186 |
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
| 1187 |
|
"no namespace specified in import pattern \"", pattern, |
| 1188 |
|
"\"", (char *) NULL); |
| 1189 |
|
} else { |
| 1190 |
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
| 1191 |
|
"import pattern \"", pattern, |
| 1192 |
|
"\" tries to import from namespace \"", |
| 1193 |
|
importNsPtr->name, "\" into itself", (char *) NULL); |
| 1194 |
|
} |
| 1195 |
|
return TCL_ERROR; |
| 1196 |
|
} |
| 1197 |
|
|
| 1198 |
|
/* |
| 1199 |
|
* Scan through the command table in the source namespace and look for |
| 1200 |
|
* exported commands that match the string pattern. Create an "imported |
| 1201 |
|
* command" in the current namespace for each imported command; these |
| 1202 |
|
* commands redirect their invocations to the "real" command. |
| 1203 |
|
*/ |
| 1204 |
|
|
| 1205 |
|
for (hPtr = Tcl_FirstHashEntry(&importNsPtr->cmdTable, &search); |
| 1206 |
|
(hPtr != NULL); |
| 1207 |
|
hPtr = Tcl_NextHashEntry(&search)) { |
| 1208 |
|
cmdName = Tcl_GetHashKey(&importNsPtr->cmdTable, hPtr); |
| 1209 |
|
if (Tcl_StringMatch(cmdName, simplePattern)) { |
| 1210 |
|
/* |
| 1211 |
|
* The command cmdName in the source namespace matches the |
| 1212 |
|
* pattern. Check whether it was exported. If it wasn't, |
| 1213 |
|
* we ignore it. |
| 1214 |
|
*/ |
| 1215 |
|
|
| 1216 |
|
wasExported = 0; |
| 1217 |
|
for (i = 0; i < importNsPtr->numExportPatterns; i++) { |
| 1218 |
|
if (Tcl_StringMatch(cmdName, |
| 1219 |
|
importNsPtr->exportArrayPtr[i])) { |
| 1220 |
|
wasExported = 1; |
| 1221 |
|
break; |
| 1222 |
|
} |
| 1223 |
|
} |
| 1224 |
|
if (!wasExported) { |
| 1225 |
|
continue; |
| 1226 |
|
} |
| 1227 |
|
|
| 1228 |
|
/* |
| 1229 |
|
* Unless there is a name clash, create an imported command |
| 1230 |
|
* in the current namespace that refers to cmdPtr. |
| 1231 |
|
*/ |
| 1232 |
|
|
| 1233 |
|
if ((Tcl_FindHashEntry(&nsPtr->cmdTable, cmdName) == NULL) |
| 1234 |
|
|| allowOverwrite) { |
| 1235 |
|
/* |
| 1236 |
|
* Create the imported command and its client data. |
| 1237 |
|
* To create the new command in the current namespace, |
| 1238 |
|
* generate a fully qualified name for it. |
| 1239 |
|
*/ |
| 1240 |
|
|
| 1241 |
|
Tcl_DString ds; |
| 1242 |
|
|
| 1243 |
|
Tcl_DStringInit(&ds); |
| 1244 |
|
Tcl_DStringAppend(&ds, nsPtr->fullName, -1); |
| 1245 |
|
if (nsPtr != iPtr->globalNsPtr) { |
| 1246 |
|
Tcl_DStringAppend(&ds, "::", 2); |
| 1247 |
|
} |
| 1248 |
|
Tcl_DStringAppend(&ds, cmdName, -1); |
| 1249 |
|
|
| 1250 |
|
/* |
| 1251 |
|
* Check whether creating the new imported command in the |
| 1252 |
|
* current namespace would create a cycle of imported->real |
| 1253 |
|
* command references that also would destroy an existing |
| 1254 |
|
* "real" command already in the current namespace. |
| 1255 |
|
*/ |
| 1256 |
|
|
| 1257 |
|
cmdPtr = (Command *) Tcl_GetHashValue(hPtr); |
| 1258 |
|
if (cmdPtr->deleteProc == DeleteImportedCmd) { |
| 1259 |
|
realCmdPtr = (Command *) TclGetOriginalCommand( |
| 1260 |
|
(Tcl_Command) cmdPtr); |
| 1261 |
|
if ((realCmdPtr != NULL) |
| 1262 |
|
&& (realCmdPtr->nsPtr == currNsPtr) |
| 1263 |
|
&& (Tcl_FindHashEntry(&currNsPtr->cmdTable, |
| 1264 |
|
cmdName) != NULL)) { |
| 1265 |
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
| 1266 |
|
"import pattern \"", pattern, |
| 1267 |
|
"\" would create a loop containing command \"", |
| 1268 |
|
Tcl_DStringValue(&ds), "\"", (char *) NULL); |
| 1269 |
|
return TCL_ERROR; |
| 1270 |
|
} |
| 1271 |
|
} |
| 1272 |
|
|
| 1273 |
|
dataPtr = (ImportedCmdData *) |
| 1274 |
|
ckalloc(sizeof(ImportedCmdData)); |
| 1275 |
|
importedCmd = Tcl_CreateObjCommand(interp, |
| 1276 |
|
Tcl_DStringValue(&ds), InvokeImportedCmd, |
| 1277 |
|
(ClientData) dataPtr, DeleteImportedCmd); |
| 1278 |
|
dataPtr->realCmdPtr = cmdPtr; |
| 1279 |
|
dataPtr->selfPtr = (Command *) importedCmd; |
| 1280 |
|
dataPtr->selfPtr->compileProc = cmdPtr->compileProc; |
| 1281 |
|
|
| 1282 |
|
/* |
| 1283 |
|
* Create an ImportRef structure describing this new import |
| 1284 |
|
* command and add it to the import ref list in the "real" |
| 1285 |
|
* command. |
| 1286 |
|
*/ |
| 1287 |
|
|
| 1288 |
|
refPtr = (ImportRef *) ckalloc(sizeof(ImportRef)); |
| 1289 |
|
refPtr->importedCmdPtr = (Command *) importedCmd; |
| 1290 |
|
refPtr->nextPtr = cmdPtr->importRefPtr; |
| 1291 |
|
cmdPtr->importRefPtr = refPtr; |
| 1292 |
|
} else { |
| 1293 |
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
| 1294 |
|
"can't import command \"", cmdName, |
| 1295 |
|
"\": already exists", (char *) NULL); |
| 1296 |
|
return TCL_ERROR; |
| 1297 |
|
} |
| 1298 |
|
} |
| 1299 |
|
} |
| 1300 |
|
return TCL_OK; |
| 1301 |
|
} |
| 1302 |
|
|
| 1303 |
|
/* |
| 1304 |
|
*---------------------------------------------------------------------- |
| 1305 |
|
* |
| 1306 |
|
* Tcl_ForgetImport -- |
| 1307 |
|
* |
| 1308 |
|
* Deletes previously imported commands. Given a pattern that may |
| 1309 |
|
* include the name of an exporting namespace, this procedure first |
| 1310 |
|
* finds all matching exported commands. It then looks in the namespace |
| 1311 |
|
* specified by namespacePtr for any corresponding previously imported |
| 1312 |
|
* commands, which it deletes. If namespacePtr is NULL, commands are |
| 1313 |
|
* deleted from the current namespace. |
| 1314 |
|
* |
| 1315 |
|
* Results: |
| 1316 |
|
* Returns TCL_OK if successful. If there is an error, returns |
| 1317 |
|
* TCL_ERROR and puts an error message in the interpreter's result |
| 1318 |
|
* object. |
| 1319 |
|
* |
| 1320 |
|
* Side effects: |
| 1321 |
|
* May delete commands. |
| 1322 |
|
* |
| 1323 |
|
*---------------------------------------------------------------------- |
| 1324 |
|
*/ |
| 1325 |
|
|
| 1326 |
|
int |
| 1327 |
|
Tcl_ForgetImport(interp, namespacePtr, pattern) |
| 1328 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 1329 |
|
Tcl_Namespace *namespacePtr; /* Points to the namespace from which |
| 1330 |
|
* previously imported commands should be |
| 1331 |
|
* removed. NULL for current namespace. */ |
| 1332 |
|
char *pattern; /* String pattern indicating which imported |
| 1333 |
|
* commands to remove. This pattern should |
| 1334 |
|
* be qualified by the name of the |
| 1335 |
|
* namespace from which the command(s) were |
| 1336 |
|
* imported. */ |
| 1337 |
|
{ |
| 1338 |
|
Namespace *nsPtr, *importNsPtr, *dummyPtr, *actualCtxPtr; |
| 1339 |
|
char *simplePattern, *cmdName; |
| 1340 |
|
register Tcl_HashEntry *hPtr; |
| 1341 |
|
Tcl_HashSearch search; |
| 1342 |
|
Command *cmdPtr; |
| 1343 |
|
|
| 1344 |
|
/* |
| 1345 |
|
* If the specified namespace is NULL, use the current namespace. |
| 1346 |
|
*/ |
| 1347 |
|
|
| 1348 |
|
if (namespacePtr == NULL) { |
| 1349 |
|
nsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
| 1350 |
|
} else { |
| 1351 |
|
nsPtr = (Namespace *) namespacePtr; |
| 1352 |
|
} |
| 1353 |
|
|
| 1354 |
|
/* |
| 1355 |
|
* From the pattern, find the namespace from which we are importing |
| 1356 |
|
* and get the simple pattern (no namespace qualifiers or ::'s) at |
| 1357 |
|
* the end. |
| 1358 |
|
*/ |
| 1359 |
|
|
| 1360 |
|
TclGetNamespaceForQualName(interp, pattern, nsPtr, |
| 1361 |
|
/*flags*/ TCL_LEAVE_ERR_MSG, &importNsPtr, &dummyPtr, |
| 1362 |
|
&actualCtxPtr, &simplePattern); |
| 1363 |
|
|
| 1364 |
|
if (importNsPtr == NULL) { |
| 1365 |
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
| 1366 |
|
"unknown namespace in namespace forget pattern \"", |
| 1367 |
|
pattern, "\"", (char *) NULL); |
| 1368 |
|
return TCL_ERROR; |
| 1369 |
|
} |
| 1370 |
|
|
| 1371 |
|
/* |
| 1372 |
|
* Scan through the command table in the source namespace and look for |
| 1373 |
|
* exported commands that match the string pattern. If the current |
| 1374 |
|
* namespace has an imported command that refers to one of those real |
| 1375 |
|
* commands, delete it. |
| 1376 |
|
*/ |
| 1377 |
|
|
| 1378 |
|
for (hPtr = Tcl_FirstHashEntry(&importNsPtr->cmdTable, &search); |
| 1379 |
|
(hPtr != NULL); |
| 1380 |
|
hPtr = Tcl_NextHashEntry(&search)) { |
| 1381 |
|
cmdName = Tcl_GetHashKey(&importNsPtr->cmdTable, hPtr); |
| 1382 |
|
if (Tcl_StringMatch(cmdName, simplePattern)) { |
| 1383 |
|
hPtr = Tcl_FindHashEntry(&nsPtr->cmdTable, cmdName); |
| 1384 |
|
if (hPtr != NULL) { /* cmd of same name in current namespace */ |
| 1385 |
|
cmdPtr = (Command *) Tcl_GetHashValue(hPtr); |
| 1386 |
|
if (cmdPtr->deleteProc == DeleteImportedCmd) { |
| 1387 |
|
Tcl_DeleteCommandFromToken(interp, (Tcl_Command) cmdPtr); |
| 1388 |
|
} |
| 1389 |
|
} |
| 1390 |
|
} |
| 1391 |
|
} |
| 1392 |
|
return TCL_OK; |
| 1393 |
|
} |
| 1394 |
|
|
| 1395 |
|
/* |
| 1396 |
|
*---------------------------------------------------------------------- |
| 1397 |
|
* |
| 1398 |
|
* TclGetOriginalCommand -- |
| 1399 |
|
* |
| 1400 |
|
* An imported command is created in an namespace when a "real" command |
| 1401 |
|
* is imported from another namespace. If the specified command is an |
| 1402 |
|
* imported command, this procedure returns the original command it |
| 1403 |
|
* refers to. |
| 1404 |
|
* |
| 1405 |
|
* Results: |
| 1406 |
|
* If the command was imported into a sequence of namespaces a, b,...,n |
| 1407 |
|
* where each successive namespace just imports the command from the |
| 1408 |
|
* previous namespace, this procedure returns the Tcl_Command token in |
| 1409 |
|
* the first namespace, a. Otherwise, if the specified command is not |
| 1410 |
|
* an imported command, the procedure returns NULL. |
| 1411 |
|
* |
| 1412 |
|
* Side effects: |
| 1413 |
|
* None. |
| 1414 |
|
* |
| 1415 |
|
*---------------------------------------------------------------------- |
| 1416 |
|
*/ |
| 1417 |
|
|
| 1418 |
|
Tcl_Command |
| 1419 |
|
TclGetOriginalCommand(command) |
| 1420 |
|
Tcl_Command command; /* The imported command for which the |
| 1421 |
|
* original command should be returned. */ |
| 1422 |
|
{ |
| 1423 |
|
register Command *cmdPtr = (Command *) command; |
| 1424 |
|
ImportedCmdData *dataPtr; |
| 1425 |
|
|
| 1426 |
|
if (cmdPtr->deleteProc != DeleteImportedCmd) { |
| 1427 |
|
return (Tcl_Command) NULL; |
| 1428 |
|
} |
| 1429 |
|
|
| 1430 |
|
while (cmdPtr->deleteProc == DeleteImportedCmd) { |
| 1431 |
|
dataPtr = (ImportedCmdData *) cmdPtr->objClientData; |
| 1432 |
|
cmdPtr = dataPtr->realCmdPtr; |
| 1433 |
|
} |
| 1434 |
|
return (Tcl_Command) cmdPtr; |
| 1435 |
|
} |
| 1436 |
|
|
| 1437 |
|
/* |
| 1438 |
|
*---------------------------------------------------------------------- |
| 1439 |
|
* |
| 1440 |
|
* InvokeImportedCmd -- |
| 1441 |
|
* |
| 1442 |
|
* Invoked by Tcl whenever the user calls an imported command that |
| 1443 |
|
* was created by Tcl_Import. Finds the "real" command (in another |
| 1444 |
|
* namespace), and passes control to it. |
| 1445 |
|
* |
| 1446 |
|
* Results: |
| 1447 |
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
| 1448 |
|
* |
| 1449 |
|
* Side effects: |
| 1450 |
|
* Returns a result in the interpreter's result object. If anything |
| 1451 |
|
* goes wrong, the result object is set to an error message. |
| 1452 |
|
* |
| 1453 |
|
*---------------------------------------------------------------------- |
| 1454 |
|
*/ |
| 1455 |
|
|
| 1456 |
|
static int |
| 1457 |
|
InvokeImportedCmd(clientData, interp, objc, objv) |
| 1458 |
|
ClientData clientData; /* Points to the imported command's |
| 1459 |
|
* ImportedCmdData structure. */ |
| 1460 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 1461 |
|
int objc; /* Number of arguments. */ |
| 1462 |
|
Tcl_Obj *CONST objv[]; /* The argument objects. */ |
| 1463 |
|
{ |
| 1464 |
|
register ImportedCmdData *dataPtr = (ImportedCmdData *) clientData; |
| 1465 |
|
register Command *realCmdPtr = dataPtr->realCmdPtr; |
| 1466 |
|
|
| 1467 |
|
return (*realCmdPtr->objProc)(realCmdPtr->objClientData, interp, |
| 1468 |
|
objc, objv); |
| 1469 |
|
} |
| 1470 |
|
|
| 1471 |
|
/* |
| 1472 |
|
*---------------------------------------------------------------------- |
| 1473 |
|
* |
| 1474 |
|
* DeleteImportedCmd -- |
| 1475 |
|
* |
| 1476 |
|
* Invoked by Tcl whenever an imported command is deleted. The "real" |
| 1477 |
|
* command keeps a list of all the imported commands that refer to it, |
| 1478 |
|
* so those imported commands can be deleted when the real command is |
| 1479 |
|
* deleted. This procedure removes the imported command reference from |
| 1480 |
|
* the real command's list, and frees up the memory associated with |
| 1481 |
|
* the imported command. |
| 1482 |
|
* |
| 1483 |
|
* Results: |
| 1484 |
|
* None. |
| 1485 |
|
* |
| 1486 |
|
* Side effects: |
| 1487 |
|
* Removes the imported command from the real command's import list. |
| 1488 |
|
* |
| 1489 |
|
*---------------------------------------------------------------------- |
| 1490 |
|
*/ |
| 1491 |
|
|
| 1492 |
|
static void |
| 1493 |
|
DeleteImportedCmd(clientData) |
| 1494 |
|
ClientData clientData; /* Points to the imported command's |
| 1495 |
|
* ImportedCmdData structure. */ |
| 1496 |
|
{ |
| 1497 |
|
ImportedCmdData *dataPtr = (ImportedCmdData *) clientData; |
| 1498 |
|
Command *realCmdPtr = dataPtr->realCmdPtr; |
| 1499 |
|
Command *selfPtr = dataPtr->selfPtr; |
| 1500 |
|
register ImportRef *refPtr, *prevPtr; |
| 1501 |
|
|
| 1502 |
|
prevPtr = NULL; |
| 1503 |
|
for (refPtr = realCmdPtr->importRefPtr; refPtr != NULL; |
| 1504 |
|
refPtr = refPtr->nextPtr) { |
| 1505 |
|
if (refPtr->importedCmdPtr == selfPtr) { |
| 1506 |
|
/* |
| 1507 |
|
* Remove *refPtr from real command's list of imported commands |
| 1508 |
|
* that refer to it. |
| 1509 |
|
*/ |
| 1510 |
|
|
| 1511 |
|
if (prevPtr == NULL) { /* refPtr is first in list */ |
| 1512 |
|
realCmdPtr->importRefPtr = refPtr->nextPtr; |
| 1513 |
|
} else { |
| 1514 |
|
prevPtr->nextPtr = refPtr->nextPtr; |
| 1515 |
|
} |
| 1516 |
|
ckfree((char *) refPtr); |
| 1517 |
|
ckfree((char *) dataPtr); |
| 1518 |
|
return; |
| 1519 |
|
} |
| 1520 |
|
prevPtr = refPtr; |
| 1521 |
|
} |
| 1522 |
|
|
| 1523 |
|
panic("DeleteImportedCmd: did not find cmd in real cmd's list of import references"); |
| 1524 |
|
} |
| 1525 |
|
|
| 1526 |
|
/* |
| 1527 |
|
*---------------------------------------------------------------------- |
| 1528 |
|
* |
| 1529 |
|
* TclGetNamespaceForQualName -- |
| 1530 |
|
* |
| 1531 |
|
* Given a qualified name specifying a command, variable, or namespace, |
| 1532 |
|
* and a namespace in which to resolve the name, this procedure returns |
| 1533 |
|
* a pointer to the namespace that contains the item. A qualified name |
| 1534 |
|
* consists of the "simple" name of an item qualified by the names of |
| 1535 |
|
* an arbitrary number of containing namespace separated by "::"s. If |
| 1536 |
|
* the qualified name starts with "::", it is interpreted absolutely |
| 1537 |
|
* from the global namespace. Otherwise, it is interpreted relative to |
| 1538 |
|
* the namespace specified by cxtNsPtr if it is non-NULL. If cxtNsPtr |
| 1539 |
|
* is NULL, the name is interpreted relative to the current namespace. |
| 1540 |
|
* |
| 1541 |
|
* A relative name like "foo::bar::x" can be found starting in either |
| 1542 |
|
* the current namespace or in the global namespace. So each search |
| 1543 |
|
* usually follows two tracks, and two possible namespaces are |
| 1544 |
|
* returned. If the procedure sets either *nsPtrPtr or *altNsPtrPtr to |
| 1545 |
|
* NULL, then that path failed. |
| 1546 |
|
* |
| 1547 |
|
* If "flags" contains TCL_GLOBAL_ONLY, the relative qualified name is |
| 1548 |
|
* sought only in the global :: namespace. The alternate search |
| 1549 |
|
* (also) starting from the global namespace is ignored and |
| 1550 |
|
* *altNsPtrPtr is set NULL. |
| 1551 |
|
* |
| 1552 |
|
* If "flags" contains TCL_NAMESPACE_ONLY, the relative qualified |
| 1553 |
|
* name is sought only in the namespace specified by cxtNsPtr. The |
| 1554 |
|
* alternate search starting from the global namespace is ignored and |
| 1555 |
|
* *altNsPtrPtr is set NULL. If both TCL_GLOBAL_ONLY and |
| 1556 |
|
* TCL_NAMESPACE_ONLY are specified, TCL_GLOBAL_ONLY is ignored and |
| 1557 |
|
* the search starts from the namespace specified by cxtNsPtr. |
| 1558 |
|
* |
| 1559 |
|
* If "flags" contains CREATE_NS_IF_UNKNOWN, all namespace |
| 1560 |
|
* components of the qualified name that cannot be found are |
| 1561 |
|
* automatically created within their specified parent. This makes sure |
| 1562 |
|
* that functions like Tcl_CreateCommand always succeed. There is no |
| 1563 |
|
* alternate search path, so *altNsPtrPtr is set NULL. |
| 1564 |
|
* |
| 1565 |
|
* If "flags" contains FIND_ONLY_NS, the qualified name is treated as a |
| 1566 |
|
* reference to a namespace, and the entire qualified name is |
| 1567 |
|
* followed. If the name is relative, the namespace is looked up only |
| 1568 |
|
* in the current namespace. A pointer to the namespace is stored in |
| 1569 |
|
* *nsPtrPtr and NULL is stored in *simpleNamePtr. Otherwise, if |
| 1570 |
|
* FIND_ONLY_NS is not specified, only the leading components are |
| 1571 |
|
* treated as namespace names, and a pointer to the simple name of the |
| 1572 |
|
* final component is stored in *simpleNamePtr. |
| 1573 |
|
* |
| 1574 |
|
* Results: |
| 1575 |
|
* It sets *nsPtrPtr and *altNsPtrPtr to point to the two possible |
| 1576 |
|
* namespaces which represent the last (containing) namespace in the |
| 1577 |
|
* qualified name. If the procedure sets either *nsPtrPtr or *altNsPtrPtr |
| 1578 |
|
* to NULL, then the search along that path failed. The procedure also |
| 1579 |
|
* stores a pointer to the simple name of the final component in |
| 1580 |
|
* *simpleNamePtr. If the qualified name is "::" or was treated as a |
| 1581 |
|
* namespace reference (FIND_ONLY_NS), the procedure stores a pointer |
| 1582 |
|
* to the namespace in *nsPtrPtr, NULL in *altNsPtrPtr, and sets |
| 1583 |
|
* *simpleNamePtr to point to an empty string. |
| 1584 |
|
* |
| 1585 |
|
* If there is an error, this procedure returns TCL_ERROR. If "flags" |
| 1586 |
|
* contains TCL_LEAVE_ERR_MSG, an error message is returned in the |
| 1587 |
|
* interpreter's result object. Otherwise, the interpreter's result |
| 1588 |
|
* object is left unchanged. |
| 1589 |
|
* |
| 1590 |
|
* *actualCxtPtrPtr is set to the actual context namespace. It is |
| 1591 |
|
* set to the input context namespace pointer in cxtNsPtr. If cxtNsPtr |
| 1592 |
|
* is NULL, it is set to the current namespace context. |
| 1593 |
|
* |
| 1594 |
|
* For backwards compatibility with the TclPro byte code loader, |
| 1595 |
|
* this function always returns TCL_OK. |
| 1596 |
|
* |
| 1597 |
|
* Side effects: |
| 1598 |
|
* If "flags" contains CREATE_NS_IF_UNKNOWN, new namespaces may be |
| 1599 |
|
* created. |
| 1600 |
|
* |
| 1601 |
|
*---------------------------------------------------------------------- |
| 1602 |
|
*/ |
| 1603 |
|
|
| 1604 |
|
int |
| 1605 |
|
TclGetNamespaceForQualName(interp, qualName, cxtNsPtr, flags, |
| 1606 |
|
nsPtrPtr, altNsPtrPtr, actualCxtPtrPtr, simpleNamePtr) |
| 1607 |
|
Tcl_Interp *interp; /* Interpreter in which to find the |
| 1608 |
|
* namespace containing qualName. */ |
| 1609 |
|
register char *qualName; /* A namespace-qualified name of an |
| 1610 |
|
* command, variable, or namespace. */ |
| 1611 |
|
Namespace *cxtNsPtr; /* The namespace in which to start the |
| 1612 |
|
* search for qualName's namespace. If NULL |
| 1613 |
|
* start from the current namespace. |
| 1614 |
|
* Ignored if TCL_GLOBAL_ONLY or |
| 1615 |
|
* TCL_NAMESPACE_ONLY are set. */ |
| 1616 |
|
int flags; /* Flags controlling the search: an OR'd |
| 1617 |
|
* combination of TCL_GLOBAL_ONLY, |
| 1618 |
|
* TCL_NAMESPACE_ONLY, |
| 1619 |
|
* CREATE_NS_IF_UNKNOWN, and |
| 1620 |
|
* FIND_ONLY_NS. */ |
| 1621 |
|
Namespace **nsPtrPtr; /* Address where procedure stores a pointer |
| 1622 |
|
* to containing namespace if qualName is |
| 1623 |
|
* found starting from *cxtNsPtr or, if |
| 1624 |
|
* TCL_GLOBAL_ONLY is set, if qualName is |
| 1625 |
|
* found in the global :: namespace. NULL |
| 1626 |
|
* is stored otherwise. */ |
| 1627 |
|
Namespace **altNsPtrPtr; /* Address where procedure stores a pointer |
| 1628 |
|
* to containing namespace if qualName is |
| 1629 |
|
* found starting from the global :: |
| 1630 |
|
* namespace. NULL is stored if qualName |
| 1631 |
|
* isn't found starting from :: or if the |
| 1632 |
|
* TCL_GLOBAL_ONLY, TCL_NAMESPACE_ONLY, |
| 1633 |
|
* CREATE_NS_IF_UNKNOWN, FIND_ONLY_NS flag |
| 1634 |
|
* is set. */ |
| 1635 |
|
Namespace **actualCxtPtrPtr; /* Address where procedure stores a pointer |
| 1636 |
|
* to the actual namespace from which the |
| 1637 |
|
* search started. This is either cxtNsPtr, |
| 1638 |
|
* the :: namespace if TCL_GLOBAL_ONLY was |
| 1639 |
|
* specified, or the current namespace if |
| 1640 |
|
* cxtNsPtr was NULL. */ |
| 1641 |
|
char **simpleNamePtr; /* Address where procedure stores the |
| 1642 |
|
* simple name at end of the qualName, or |
| 1643 |
|
* NULL if qualName is "::" or the flag |
| 1644 |
|
* FIND_ONLY_NS was specified. */ |
| 1645 |
|
{ |
| 1646 |
|
Interp *iPtr = (Interp *) interp; |
| 1647 |
|
Namespace *nsPtr = cxtNsPtr; |
| 1648 |
|
Namespace *altNsPtr; |
| 1649 |
|
Namespace *globalNsPtr = iPtr->globalNsPtr; |
| 1650 |
|
register char *start, *end; |
| 1651 |
|
char *nsName; |
| 1652 |
|
Tcl_HashEntry *entryPtr; |
| 1653 |
|
Tcl_DString buffer; |
| 1654 |
|
int len; |
| 1655 |
|
|
| 1656 |
|
/* |
| 1657 |
|
* Determine the context namespace nsPtr in which to start the primary |
| 1658 |
|
* search. If TCL_NAMESPACE_ONLY or FIND_ONLY_NS was specified, search |
| 1659 |
|
* from the current namespace. If the qualName name starts with a "::" |
| 1660 |
|
* or TCL_GLOBAL_ONLY was specified, search from the global |
| 1661 |
|
* namespace. Otherwise, use the given namespace given in cxtNsPtr, or |
| 1662 |
|
* if that is NULL, use the current namespace context. Note that we |
| 1663 |
|
* always treat two or more adjacent ":"s as a namespace separator. |
| 1664 |
|
*/ |
| 1665 |
|
|
| 1666 |
|
if (flags & (TCL_NAMESPACE_ONLY | FIND_ONLY_NS)) { |
| 1667 |
|
nsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
| 1668 |
|
} else if (flags & TCL_GLOBAL_ONLY) { |
| 1669 |
|
nsPtr = globalNsPtr; |
| 1670 |
|
} else if (nsPtr == NULL) { |
| 1671 |
|
if (iPtr->varFramePtr != NULL) { |
| 1672 |
|
nsPtr = iPtr->varFramePtr->nsPtr; |
| 1673 |
|
} else { |
| 1674 |
|
nsPtr = iPtr->globalNsPtr; |
| 1675 |
|
} |
| 1676 |
|
} |
| 1677 |
|
|
| 1678 |
|
start = qualName; /* pts to start of qualifying namespace */ |
| 1679 |
|
if ((*qualName == ':') && (*(qualName+1) == ':')) { |
| 1680 |
|
start = qualName+2; /* skip over the initial :: */ |
| 1681 |
|
while (*start == ':') { |
| 1682 |
|
start++; /* skip over a subsequent : */ |
| 1683 |
|
} |
| 1684 |
|
nsPtr = globalNsPtr; |
| 1685 |
|
if (*start == '\0') { /* qualName is just two or more ":"s */ |
| 1686 |
|
*nsPtrPtr = globalNsPtr; |
| 1687 |
|
*altNsPtrPtr = NULL; |
| 1688 |
|
*actualCxtPtrPtr = globalNsPtr; |
| 1689 |
|
*simpleNamePtr = start; /* points to empty string */ |
| 1690 |
|
return TCL_OK; |
| 1691 |
|
} |
| 1692 |
|
} |
| 1693 |
|
*actualCxtPtrPtr = nsPtr; |
| 1694 |
|
|
| 1695 |
|
/* |
| 1696 |
|
* Start an alternate search path starting with the global namespace. |
| 1697 |
|
* However, if the starting context is the global namespace, or if the |
| 1698 |
|
* flag is set to search only the namespace *cxtNsPtr, ignore the |
| 1699 |
|
* alternate search path. |
| 1700 |
|
*/ |
| 1701 |
|
|
| 1702 |
|
altNsPtr = globalNsPtr; |
| 1703 |
|
if ((nsPtr == globalNsPtr) |
| 1704 |
|
|| (flags & (TCL_NAMESPACE_ONLY | FIND_ONLY_NS))) { |
| 1705 |
|
altNsPtr = NULL; |
| 1706 |
|
} |
| 1707 |
|
|
| 1708 |
|
/* |
| 1709 |
|
* Loop to resolve each namespace qualifier in qualName. |
| 1710 |
|
*/ |
| 1711 |
|
|
| 1712 |
|
Tcl_DStringInit(&buffer); |
| 1713 |
|
end = start; |
| 1714 |
|
while (*start != '\0') { |
| 1715 |
|
/* |
| 1716 |
|
* Find the next namespace qualifier (i.e., a name ending in "::") |
| 1717 |
|
* or the end of the qualified name (i.e., a name ending in "\0"). |
| 1718 |
|
* Set len to the number of characters, starting from start, |
| 1719 |
|
* in the name; set end to point after the "::"s or at the "\0". |
| 1720 |
|
*/ |
| 1721 |
|
|
| 1722 |
|
len = 0; |
| 1723 |
|
for (end = start; *end != '\0'; end++) { |
| 1724 |
|
if ((*end == ':') && (*(end+1) == ':')) { |
| 1725 |
|
end += 2; /* skip over the initial :: */ |
| 1726 |
|
while (*end == ':') { |
| 1727 |
|
end++; /* skip over the subsequent : */ |
| 1728 |
|
} |
| 1729 |
|
break; /* exit for loop; end is after ::'s */ |
| 1730 |
|
} |
| 1731 |
|
len++; |
| 1732 |
|
} |
| 1733 |
|
|
| 1734 |
|
if ((*end == '\0') |
| 1735 |
|
&& !((end-start >= 2) && (*(end-1) == ':') && (*(end-2) == ':'))) { |
| 1736 |
|
/* |
| 1737 |
|
* qualName ended with a simple name at start. If FIND_ONLY_NS |
| 1738 |
|
* was specified, look this up as a namespace. Otherwise, |
| 1739 |
|
* start is the name of a cmd or var and we are done. |
| 1740 |
|
*/ |
| 1741 |
|
|
| 1742 |
|
if (flags & FIND_ONLY_NS) { |
| 1743 |
|
nsName = start; |
| 1744 |
|
} else { |
| 1745 |
|
*nsPtrPtr = nsPtr; |
| 1746 |
|
*altNsPtrPtr = altNsPtr; |
| 1747 |
|
*simpleNamePtr = start; |
| 1748 |
|
Tcl_DStringFree(&buffer); |
| 1749 |
|
return TCL_OK; |
| 1750 |
|
} |
| 1751 |
|
} else { |
| 1752 |
|
/* |
| 1753 |
|
* start points to the beginning of a namespace qualifier ending |
| 1754 |
|
* in "::". end points to the start of a name in that namespace |
| 1755 |
|
* that might be empty. Copy the namespace qualifier to a |
| 1756 |
|
* buffer so it can be null terminated. We can't modify the |
| 1757 |
|
* incoming qualName since it may be a string constant. |
| 1758 |
|
*/ |
| 1759 |
|
|
| 1760 |
|
Tcl_DStringSetLength(&buffer, 0); |
| 1761 |
|
Tcl_DStringAppend(&buffer, start, len); |
| 1762 |
|
nsName = Tcl_DStringValue(&buffer); |
| 1763 |
|
} |
| 1764 |
|
|
| 1765 |
|
/* |
| 1766 |
|
* Look up the namespace qualifier nsName in the current namespace |
| 1767 |
|
* context. If it isn't found but CREATE_NS_IF_UNKNOWN is set, |
| 1768 |
|
* create that qualifying namespace. This is needed for procedures |
| 1769 |
|
* like Tcl_CreateCommand that cannot fail. |
| 1770 |
|
*/ |
| 1771 |
|
|
| 1772 |
|
if (nsPtr != NULL) { |
| 1773 |
|
entryPtr = Tcl_FindHashEntry(&nsPtr->childTable, nsName); |
| 1774 |
|
if (entryPtr != NULL) { |
| 1775 |
|
nsPtr = (Namespace *) Tcl_GetHashValue(entryPtr); |
| 1776 |
|
} else if (flags & CREATE_NS_IF_UNKNOWN) { |
| 1777 |
|
Tcl_CallFrame frame; |
| 1778 |
|
|
| 1779 |
|
(void) Tcl_PushCallFrame(interp, &frame, |
| 1780 |
|
(Tcl_Namespace *) nsPtr, /*isProcCallFrame*/ 0); |
| 1781 |
|
|
| 1782 |
|
nsPtr = (Namespace *) Tcl_CreateNamespace(interp, nsName, |
| 1783 |
|
(ClientData) NULL, (Tcl_NamespaceDeleteProc *) NULL); |
| 1784 |
|
Tcl_PopCallFrame(interp); |
| 1785 |
|
|
| 1786 |
|
if (nsPtr == NULL) { |
| 1787 |
|
panic("Could not create namespace '%s'", nsName); |
| 1788 |
|
} |
| 1789 |
|
} else { /* namespace not found and wasn't created */ |
| 1790 |
|
nsPtr = NULL; |
| 1791 |
|
} |
| 1792 |
|
} |
| 1793 |
|
|
| 1794 |
|
/* |
| 1795 |
|
* Look up the namespace qualifier in the alternate search path too. |
| 1796 |
|
*/ |
| 1797 |
|
|
| 1798 |
|
if (altNsPtr != NULL) { |
| 1799 |
|
entryPtr = Tcl_FindHashEntry(&altNsPtr->childTable, nsName); |
| 1800 |
|
if (entryPtr != NULL) { |
| 1801 |
|
altNsPtr = (Namespace *) Tcl_GetHashValue(entryPtr); |
| 1802 |
|
} else { |
| 1803 |
|
altNsPtr = NULL; |
| 1804 |
|
} |
| 1805 |
|
} |
| 1806 |
|
|
| 1807 |
|
/* |
| 1808 |
|
* If both search paths have failed, return NULL results. |
| 1809 |
|
*/ |
| 1810 |
|
|
| 1811 |
|
if ((nsPtr == NULL) && (altNsPtr == NULL)) { |
| 1812 |
|
*nsPtrPtr = NULL; |
| 1813 |
|
*altNsPtrPtr = NULL; |
| 1814 |
|
*simpleNamePtr = NULL; |
| 1815 |
|
Tcl_DStringFree(&buffer); |
| 1816 |
|
return TCL_OK; |
| 1817 |
|
} |
| 1818 |
|
|
| 1819 |
|
start = end; |
| 1820 |
|
} |
| 1821 |
|
|
| 1822 |
|
/* |
| 1823 |
|
* We ignore trailing "::"s in a namespace name, but in a command or |
| 1824 |
|
* variable name, trailing "::"s refer to the cmd or var named {}. |
| 1825 |
|
*/ |
| 1826 |
|
|
| 1827 |
|
if ((flags & FIND_ONLY_NS) |
| 1828 |
|
|| ((end > start ) && (*(end-1) != ':'))) { |
| 1829 |
|
*simpleNamePtr = NULL; /* found namespace name */ |
| 1830 |
|
} else { |
| 1831 |
|
*simpleNamePtr = end; /* found cmd/var: points to empty string */ |
| 1832 |
|
} |
| 1833 |
|
|
| 1834 |
|
/* |
| 1835 |
|
* As a special case, if we are looking for a namespace and qualName |
| 1836 |
|
* is "" and the current active namespace (nsPtr) is not the global |
| 1837 |
|
* namespace, return NULL (no namespace was found). This is because |
| 1838 |
|
* namespaces can not have empty names except for the global namespace. |
| 1839 |
|
*/ |
| 1840 |
|
|
| 1841 |
|
if ((flags & FIND_ONLY_NS) && (*qualName == '\0') |
| 1842 |
|
&& (nsPtr != globalNsPtr)) { |
| 1843 |
|
nsPtr = NULL; |
| 1844 |
|
} |
| 1845 |
|
|
| 1846 |
|
*nsPtrPtr = nsPtr; |
| 1847 |
|
*altNsPtrPtr = altNsPtr; |
| 1848 |
|
Tcl_DStringFree(&buffer); |
| 1849 |
|
return TCL_OK; |
| 1850 |
|
} |
| 1851 |
|
|
| 1852 |
|
/* |
| 1853 |
|
*---------------------------------------------------------------------- |
| 1854 |
|
* |
| 1855 |
|
* Tcl_FindNamespace -- |
| 1856 |
|
* |
| 1857 |
|
* Searches for a namespace. |
| 1858 |
|
* |
| 1859 |
|
* Results: |
| 1860 |
|
* Returns a pointer to the namespace if it is found. Otherwise, |
| 1861 |
|
* returns NULL and leaves an error message in the interpreter's |
| 1862 |
|
* result object if "flags" contains TCL_LEAVE_ERR_MSG. |
| 1863 |
|
* |
| 1864 |
|
* Side effects: |
| 1865 |
|
* None. |
| 1866 |
|
* |
| 1867 |
|
*---------------------------------------------------------------------- |
| 1868 |
|
*/ |
| 1869 |
|
|
| 1870 |
|
Tcl_Namespace * |
| 1871 |
|
Tcl_FindNamespace(interp, name, contextNsPtr, flags) |
| 1872 |
|
Tcl_Interp *interp; /* The interpreter in which to find the |
| 1873 |
|
* namespace. */ |
| 1874 |
|
char *name; /* Namespace name. If it starts with "::", |
| 1875 |
|
* will be looked up in global namespace. |
| 1876 |
|
* Else, looked up first in contextNsPtr |
| 1877 |
|
* (current namespace if contextNsPtr is |
| 1878 |
|
* NULL), then in global namespace. */ |
| 1879 |
|
Tcl_Namespace *contextNsPtr; /* Ignored if TCL_GLOBAL_ONLY flag is set |
| 1880 |
|
* or if the name starts with "::". |
| 1881 |
|
* Otherwise, points to namespace in which |
| 1882 |
|
* to resolve name; if NULL, look up name |
| 1883 |
|
* in the current namespace. */ |
| 1884 |
|
register int flags; /* Flags controlling namespace lookup: an |
| 1885 |
|
* OR'd combination of TCL_GLOBAL_ONLY and |
| 1886 |
|
* TCL_LEAVE_ERR_MSG flags. */ |
| 1887 |
|
{ |
| 1888 |
|
Namespace *nsPtr, *dummy1Ptr, *dummy2Ptr; |
| 1889 |
|
char *dummy; |
| 1890 |
|
|
| 1891 |
|
/* |
| 1892 |
|
* Find the namespace(s) that contain the specified namespace name. |
| 1893 |
|
* Add the FIND_ONLY_NS flag to resolve the name all the way down |
| 1894 |
|
* to its last component, a namespace. |
| 1895 |
|
*/ |
| 1896 |
|
|
| 1897 |
|
TclGetNamespaceForQualName(interp, name, (Namespace *) contextNsPtr, |
| 1898 |
|
(flags | FIND_ONLY_NS), &nsPtr, &dummy1Ptr, &dummy2Ptr, &dummy); |
| 1899 |
|
|
| 1900 |
|
if (nsPtr != NULL) { |
| 1901 |
|
return (Tcl_Namespace *) nsPtr; |
| 1902 |
|
} else if (flags & TCL_LEAVE_ERR_MSG) { |
| 1903 |
|
Tcl_ResetResult(interp); |
| 1904 |
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
| 1905 |
|
"unknown namespace \"", name, "\"", (char *) NULL); |
| 1906 |
|
} |
| 1907 |
|
return NULL; |
| 1908 |
|
} |
| 1909 |
|
|
| 1910 |
|
/* |
| 1911 |
|
*---------------------------------------------------------------------- |
| 1912 |
|
* |
| 1913 |
|
* Tcl_FindCommand -- |
| 1914 |
|
* |
| 1915 |
|
* Searches for a command. |
| 1916 |
|
* |
| 1917 |
|
* Results: |
| 1918 |
|
* Returns a token for the command if it is found. Otherwise, if it |
| 1919 |
|
* can't be found or there is an error, returns NULL and leaves an |
| 1920 |
|
* error message in the interpreter's result object if "flags" |
| 1921 |
|
* contains TCL_LEAVE_ERR_MSG. |
| 1922 |
|
* |
| 1923 |
|
* Side effects: |
| 1924 |
|
* None. |
| 1925 |
|
* |
| 1926 |
|
*---------------------------------------------------------------------- |
| 1927 |
|
*/ |
| 1928 |
|
|
| 1929 |
|
Tcl_Command |
| 1930 |
|
Tcl_FindCommand(interp, name, contextNsPtr, flags) |
| 1931 |
|
Tcl_Interp *interp; /* The interpreter in which to find the |
| 1932 |
|
* command and to report errors. */ |
| 1933 |
|
char *name; /* Command's name. If it starts with "::", |
| 1934 |
|
* will be looked up in global namespace. |
| 1935 |
|
* Else, looked up first in contextNsPtr |
| 1936 |
|
* (current namespace if contextNsPtr is |
| 1937 |
|
* NULL), then in global namespace. */ |
| 1938 |
|
Tcl_Namespace *contextNsPtr; /* Ignored if TCL_GLOBAL_ONLY flag set. |
| 1939 |
|
* Otherwise, points to namespace in which |
| 1940 |
|
* to resolve name. If NULL, look up name |
| 1941 |
|
* in the current namespace. */ |
| 1942 |
|
int flags; /* An OR'd combination of flags: |
| 1943 |
|
* TCL_GLOBAL_ONLY (look up name only in |
| 1944 |
|
* global namespace), TCL_NAMESPACE_ONLY |
| 1945 |
|
* (look up only in contextNsPtr, or the |
| 1946 |
|
* current namespace if contextNsPtr is |
| 1947 |
|
* NULL), and TCL_LEAVE_ERR_MSG. If both |
| 1948 |
|
* TCL_GLOBAL_ONLY and TCL_NAMESPACE_ONLY |
| 1949 |
|
* are given, TCL_GLOBAL_ONLY is |
| 1950 |
|
* ignored. */ |
| 1951 |
|
{ |
| 1952 |
|
Interp *iPtr = (Interp*)interp; |
| 1953 |
|
|
| 1954 |
|
ResolverScheme *resPtr; |
| 1955 |
|
Namespace *nsPtr[2], *cxtNsPtr; |
| 1956 |
|
char *simpleName; |
| 1957 |
|
register Tcl_HashEntry *entryPtr; |
| 1958 |
|
register Command *cmdPtr; |
| 1959 |
|
register int search; |
| 1960 |
|
int result; |
| 1961 |
|
Tcl_Command cmd; |
| 1962 |
|
|
| 1963 |
|
/* |
| 1964 |
|
* If this namespace has a command resolver, then give it first |
| 1965 |
|
* crack at the command resolution. If the interpreter has any |
| 1966 |
|
* command resolvers, consult them next. The command resolver |
| 1967 |
|
* procedures may return a Tcl_Command value, they may signal |
| 1968 |
|
* to continue onward, or they may signal an error. |
| 1969 |
|
*/ |
| 1970 |
|
if ((flags & TCL_GLOBAL_ONLY) != 0) { |
| 1971 |
|
cxtNsPtr = (Namespace *) Tcl_GetGlobalNamespace(interp); |
| 1972 |
|
} |
| 1973 |
|
else if (contextNsPtr != NULL) { |
| 1974 |
|
cxtNsPtr = (Namespace *) contextNsPtr; |
| 1975 |
|
} |
| 1976 |
|
else { |
| 1977 |
|
cxtNsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
| 1978 |
|
} |
| 1979 |
|
|
| 1980 |
|
if (cxtNsPtr->cmdResProc != NULL || iPtr->resolverPtr != NULL) { |
| 1981 |
|
resPtr = iPtr->resolverPtr; |
| 1982 |
|
|
| 1983 |
|
if (cxtNsPtr->cmdResProc) { |
| 1984 |
|
result = (*cxtNsPtr->cmdResProc)(interp, name, |
| 1985 |
|
(Tcl_Namespace *) cxtNsPtr, flags, &cmd); |
| 1986 |
|
} else { |
| 1987 |
|
result = TCL_CONTINUE; |
| 1988 |
|
} |
| 1989 |
|
|
| 1990 |
|
while (result == TCL_CONTINUE && resPtr) { |
| 1991 |
|
if (resPtr->cmdResProc) { |
| 1992 |
|
result = (*resPtr->cmdResProc)(interp, name, |
| 1993 |
|
(Tcl_Namespace *) cxtNsPtr, flags, &cmd); |
| 1994 |
|
} |
| 1995 |
|
resPtr = resPtr->nextPtr; |
| 1996 |
|
} |
| 1997 |
|
|
| 1998 |
|
if (result == TCL_OK) { |
| 1999 |
|
return cmd; |
| 2000 |
|
} |
| 2001 |
|
else if (result != TCL_CONTINUE) { |
| 2002 |
|
return (Tcl_Command) NULL; |
| 2003 |
|
} |
| 2004 |
|
} |
| 2005 |
|
|
| 2006 |
|
/* |
| 2007 |
|
* Find the namespace(s) that contain the command. |
| 2008 |
|
*/ |
| 2009 |
|
|
| 2010 |
|
TclGetNamespaceForQualName(interp, name, (Namespace *) contextNsPtr, |
| 2011 |
|
flags, &nsPtr[0], &nsPtr[1], &cxtNsPtr, &simpleName); |
| 2012 |
|
|
| 2013 |
|
/* |
| 2014 |
|
* Look for the command in the command table of its namespace. |
| 2015 |
|
* Be sure to check both possible search paths: from the specified |
| 2016 |
|
* namespace context and from the global namespace. |
| 2017 |
|
*/ |
| 2018 |
|
|
| 2019 |
|
cmdPtr = NULL; |
| 2020 |
|
for (search = 0; (search < 2) && (cmdPtr == NULL); search++) { |
| 2021 |
|
if ((nsPtr[search] != NULL) && (simpleName != NULL)) { |
| 2022 |
|
entryPtr = Tcl_FindHashEntry(&nsPtr[search]->cmdTable, |
| 2023 |
|
simpleName); |
| 2024 |
|
if (entryPtr != NULL) { |
| 2025 |
|
cmdPtr = (Command *) Tcl_GetHashValue(entryPtr); |
| 2026 |
|
} |
| 2027 |
|
} |
| 2028 |
|
} |
| 2029 |
|
if (cmdPtr != NULL) { |
| 2030 |
|
return (Tcl_Command) cmdPtr; |
| 2031 |
|
} else if (flags & TCL_LEAVE_ERR_MSG) { |
| 2032 |
|
Tcl_ResetResult(interp); |
| 2033 |
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
| 2034 |
|
"unknown command \"", name, "\"", (char *) NULL); |
| 2035 |
|
} |
| 2036 |
|
|
| 2037 |
|
return (Tcl_Command) NULL; |
| 2038 |
|
} |
| 2039 |
|
|
| 2040 |
|
/* |
| 2041 |
|
*---------------------------------------------------------------------- |
| 2042 |
|
* |
| 2043 |
|
* Tcl_FindNamespaceVar -- |
| 2044 |
|
* |
| 2045 |
|
* Searches for a namespace variable, a variable not local to a |
| 2046 |
|
* procedure. The variable can be either a scalar or an array, but |
| 2047 |
|
* may not be an element of an array. |
| 2048 |
|
* |
| 2049 |
|
* Results: |
| 2050 |
|
* Returns a token for the variable if it is found. Otherwise, if it |
| 2051 |
|
* can't be found or there is an error, returns NULL and leaves an |
| 2052 |
|
* error message in the interpreter's result object if "flags" |
| 2053 |
|
* contains TCL_LEAVE_ERR_MSG. |
| 2054 |
|
* |
| 2055 |
|
* Side effects: |
| 2056 |
|
* None. |
| 2057 |
|
* |
| 2058 |
|
*---------------------------------------------------------------------- |
| 2059 |
|
*/ |
| 2060 |
|
|
| 2061 |
|
Tcl_Var |
| 2062 |
|
Tcl_FindNamespaceVar(interp, name, contextNsPtr, flags) |
| 2063 |
|
Tcl_Interp *interp; /* The interpreter in which to find the |
| 2064 |
|
* variable. */ |
| 2065 |
|
char *name; /* Variable's name. If it starts with "::", |
| 2066 |
|
* will be looked up in global namespace. |
| 2067 |
|
* Else, looked up first in contextNsPtr |
| 2068 |
|
* (current namespace if contextNsPtr is |
| 2069 |
|
* NULL), then in global namespace. */ |
| 2070 |
|
Tcl_Namespace *contextNsPtr; /* Ignored if TCL_GLOBAL_ONLY flag set. |
| 2071 |
|
* Otherwise, points to namespace in which |
| 2072 |
|
* to resolve name. If NULL, look up name |
| 2073 |
|
* in the current namespace. */ |
| 2074 |
|
int flags; /* An OR'd combination of flags: |
| 2075 |
|
* TCL_GLOBAL_ONLY (look up name only in |
| 2076 |
|
* global namespace), TCL_NAMESPACE_ONLY |
| 2077 |
|
* (look up only in contextNsPtr, or the |
| 2078 |
|
* current namespace if contextNsPtr is |
| 2079 |
|
* NULL), and TCL_LEAVE_ERR_MSG. If both |
| 2080 |
|
* TCL_GLOBAL_ONLY and TCL_NAMESPACE_ONLY |
| 2081 |
|
* are given, TCL_GLOBAL_ONLY is |
| 2082 |
|
* ignored. */ |
| 2083 |
|
{ |
| 2084 |
|
Interp *iPtr = (Interp*)interp; |
| 2085 |
|
ResolverScheme *resPtr; |
| 2086 |
|
Namespace *nsPtr[2], *cxtNsPtr; |
| 2087 |
|
char *simpleName; |
| 2088 |
|
Tcl_HashEntry *entryPtr; |
| 2089 |
|
Var *varPtr; |
| 2090 |
|
register int search; |
| 2091 |
|
int result; |
| 2092 |
|
Tcl_Var var; |
| 2093 |
|
|
| 2094 |
|
/* |
| 2095 |
|
* If this namespace has a variable resolver, then give it first |
| 2096 |
|
* crack at the variable resolution. It may return a Tcl_Var |
| 2097 |
|
* value, it may signal to continue onward, or it may signal |
| 2098 |
|
* an error. |
| 2099 |
|
*/ |
| 2100 |
|
if ((flags & TCL_GLOBAL_ONLY) != 0) { |
| 2101 |
|
cxtNsPtr = (Namespace *) Tcl_GetGlobalNamespace(interp); |
| 2102 |
|
} |
| 2103 |
|
else if (contextNsPtr != NULL) { |
| 2104 |
|
cxtNsPtr = (Namespace *) contextNsPtr; |
| 2105 |
|
} |
| 2106 |
|
else { |
| 2107 |
|
cxtNsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
| 2108 |
|
} |
| 2109 |
|
|
| 2110 |
|
if (cxtNsPtr->varResProc != NULL || iPtr->resolverPtr != NULL) { |
| 2111 |
|
resPtr = iPtr->resolverPtr; |
| 2112 |
|
|
| 2113 |
|
if (cxtNsPtr->varResProc) { |
| 2114 |
|
result = (*cxtNsPtr->varResProc)(interp, name, |
| 2115 |
|
(Tcl_Namespace *) cxtNsPtr, flags, &var); |
| 2116 |
|
} else { |
| 2117 |
|
result = TCL_CONTINUE; |
| 2118 |
|
} |
| 2119 |
|
|
| 2120 |
|
while (result == TCL_CONTINUE && resPtr) { |
| 2121 |
|
if (resPtr->varResProc) { |
| 2122 |
|
result = (*resPtr->varResProc)(interp, name, |
| 2123 |
|
(Tcl_Namespace *) cxtNsPtr, flags, &var); |
| 2124 |
|
} |
| 2125 |
|
resPtr = resPtr->nextPtr; |
| 2126 |
|
} |
| 2127 |
|
|
| 2128 |
|
if (result == TCL_OK) { |
| 2129 |
|
return var; |
| 2130 |
|
} |
| 2131 |
|
else if (result != TCL_CONTINUE) { |
| 2132 |
|
return (Tcl_Var) NULL; |
| 2133 |
|
} |
| 2134 |
|
} |
| 2135 |
|
|
| 2136 |
|
/* |
| 2137 |
|
* Find the namespace(s) that contain the variable. |
| 2138 |
|
*/ |
| 2139 |
|
|
| 2140 |
|
TclGetNamespaceForQualName(interp, name, (Namespace *) contextNsPtr, |
| 2141 |
|
flags, &nsPtr[0], &nsPtr[1], &cxtNsPtr, &simpleName); |
| 2142 |
|
|
| 2143 |
|
/* |
| 2144 |
|
* Look for the variable in the variable table of its namespace. |
| 2145 |
|
* Be sure to check both possible search paths: from the specified |
| 2146 |
|
* namespace context and from the global namespace. |
| 2147 |
|
*/ |
| 2148 |
|
|
| 2149 |
|
varPtr = NULL; |
| 2150 |
|
for (search = 0; (search < 2) && (varPtr == NULL); search++) { |
| 2151 |
|
if ((nsPtr[search] != NULL) && (simpleName != NULL)) { |
| 2152 |
|
entryPtr = Tcl_FindHashEntry(&nsPtr[search]->varTable, |
| 2153 |
|
simpleName); |
| 2154 |
|
if (entryPtr != NULL) { |
| 2155 |
|
varPtr = (Var *) Tcl_GetHashValue(entryPtr); |
| 2156 |
|
} |
| 2157 |
|
} |
| 2158 |
|
} |
| 2159 |
|
if (varPtr != NULL) { |
| 2160 |
|
return (Tcl_Var) varPtr; |
| 2161 |
|
} else if (flags & TCL_LEAVE_ERR_MSG) { |
| 2162 |
|
Tcl_ResetResult(interp); |
| 2163 |
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
| 2164 |
|
"unknown variable \"", name, "\"", (char *) NULL); |
| 2165 |
|
} |
| 2166 |
|
return (Tcl_Var) NULL; |
| 2167 |
|
} |
| 2168 |
|
|
| 2169 |
|
/* |
| 2170 |
|
*---------------------------------------------------------------------- |
| 2171 |
|
* |
| 2172 |
|
* TclResetShadowedCmdRefs -- |
| 2173 |
|
* |
| 2174 |
|
* Called when a command is added to a namespace to check for existing |
| 2175 |
|
* command references that the new command may invalidate. Consider the |
| 2176 |
|
* following cases that could happen when you add a command "foo" to a |
| 2177 |
|
* namespace "b": |
| 2178 |
|
* 1. It could shadow a command named "foo" at the global scope. |
| 2179 |
|
* If it does, all command references in the namespace "b" are |
| 2180 |
|
* suspect. |
| 2181 |
|
* 2. Suppose the namespace "b" resides in a namespace "a". |
| 2182 |
|
* Then to "a" the new command "b::foo" could shadow another |
| 2183 |
|
* command "b::foo" in the global namespace. If so, then all |
| 2184 |
|
* command references in "a" are suspect. |
| 2185 |
|
* The same checks are applied to all parent namespaces, until we |
| 2186 |
|
* reach the global :: namespace. |
| 2187 |
|
* |
| 2188 |
|
* Results: |
| 2189 |
|
* None. |
| 2190 |
|
* |
| 2191 |
|
* Side effects: |
| 2192 |
|
* If the new command shadows an existing command, the cmdRefEpoch |
| 2193 |
|
* counter is incremented in each namespace that sees the shadow. |
| 2194 |
|
* This invalidates all command references that were previously cached |
| 2195 |
|
* in that namespace. The next time the commands are used, they are |
| 2196 |
|
* resolved from scratch. |
| 2197 |
|
* |
| 2198 |
|
*---------------------------------------------------------------------- |
| 2199 |
|
*/ |
| 2200 |
|
|
| 2201 |
|
void |
| 2202 |
|
TclResetShadowedCmdRefs(interp, newCmdPtr) |
| 2203 |
|
Tcl_Interp *interp; /* Interpreter containing the new command. */ |
| 2204 |
|
Command *newCmdPtr; /* Points to the new command. */ |
| 2205 |
|
{ |
| 2206 |
|
char *cmdName; |
| 2207 |
|
Tcl_HashEntry *hPtr; |
| 2208 |
|
register Namespace *nsPtr; |
| 2209 |
|
Namespace *trailNsPtr, *shadowNsPtr; |
| 2210 |
|
Namespace *globalNsPtr = (Namespace *) Tcl_GetGlobalNamespace(interp); |
| 2211 |
|
int found, i; |
| 2212 |
|
|
| 2213 |
|
/* |
| 2214 |
|
* This procedure generates an array used to hold the trail list. This |
| 2215 |
|
* starts out with stack-allocated space but uses dynamically-allocated |
| 2216 |
|
* storage if needed. |
| 2217 |
|
*/ |
| 2218 |
|
|
| 2219 |
|
Namespace *(trailStorage[NUM_TRAIL_ELEMS]); |
| 2220 |
|
Namespace **trailPtr = trailStorage; |
| 2221 |
|
int trailFront = -1; |
| 2222 |
|
int trailSize = NUM_TRAIL_ELEMS; |
| 2223 |
|
|
| 2224 |
|
/* |
| 2225 |
|
* Start at the namespace containing the new command, and work up |
| 2226 |
|
* through the list of parents. Stop just before the global namespace, |
| 2227 |
|
* since the global namespace can't "shadow" its own entries. |
| 2228 |
|
* |
| 2229 |
|
* The namespace "trail" list we build consists of the names of each |
| 2230 |
|
* namespace that encloses the new command, in order from outermost to |
| 2231 |
|
* innermost: for example, "a" then "b". Each iteration of this loop |
| 2232 |
|
* eventually extends the trail upwards by one namespace, nsPtr. We use |
| 2233 |
|
* this trail list to see if nsPtr (e.g. "a" in 2. above) could have |
| 2234 |
|
* now-invalid cached command references. This will happen if nsPtr |
| 2235 |
|
* (e.g. "a") contains a sequence of child namespaces (e.g. "b") |
| 2236 |
|
* such that there is a identically-named sequence of child namespaces |
| 2237 |
|
* starting from :: (e.g. "::b") whose tail namespace contains a command |
| 2238 |
|
* also named cmdName. |
| 2239 |
|
*/ |
| 2240 |
|
|
| 2241 |
|
cmdName = Tcl_GetHashKey(newCmdPtr->hPtr->tablePtr, newCmdPtr->hPtr); |
| 2242 |
|
for (nsPtr = newCmdPtr->nsPtr; |
| 2243 |
|
(nsPtr != NULL) && (nsPtr != globalNsPtr); |
| 2244 |
|
nsPtr = nsPtr->parentPtr) { |
| 2245 |
|
/* |
| 2246 |
|
* Find the maximal sequence of child namespaces contained in nsPtr |
| 2247 |
|
* such that there is a identically-named sequence of child |
| 2248 |
|
* namespaces starting from ::. shadowNsPtr will be the tail of this |
| 2249 |
|
* sequence, or the deepest namespace under :: that might contain a |
| 2250 |
|
* command now shadowed by cmdName. We check below if shadowNsPtr |
| 2251 |
|
* actually contains a command cmdName. |
| 2252 |
|
*/ |
| 2253 |
|
|
| 2254 |
|
found = 1; |
| 2255 |
|
shadowNsPtr = globalNsPtr; |
| 2256 |
|
|
| 2257 |
|
for (i = trailFront; i >= 0; i--) { |
| 2258 |
|
trailNsPtr = trailPtr[i]; |
| 2259 |
|
hPtr = Tcl_FindHashEntry(&shadowNsPtr->childTable, |
| 2260 |
|
trailNsPtr->name); |
| 2261 |
|
if (hPtr != NULL) { |
| 2262 |
|
shadowNsPtr = (Namespace *) Tcl_GetHashValue(hPtr); |
| 2263 |
|
} else { |
| 2264 |
|
found = 0; |
| 2265 |
|
break; |
| 2266 |
|
} |
| 2267 |
|
} |
| 2268 |
|
|
| 2269 |
|
/* |
| 2270 |
|
* If shadowNsPtr contains a command named cmdName, we invalidate |
| 2271 |
|
* all of the command refs cached in nsPtr. As a boundary case, |
| 2272 |
|
* shadowNsPtr is initially :: and we check for case 1. above. |
| 2273 |
|
*/ |
| 2274 |
|
|
| 2275 |
|
if (found) { |
| 2276 |
|
hPtr = Tcl_FindHashEntry(&shadowNsPtr->cmdTable, cmdName); |
| 2277 |
|
if (hPtr != NULL) { |
| 2278 |
|
nsPtr->cmdRefEpoch++; |
| 2279 |
|
} |
| 2280 |
|
} |
| 2281 |
|
|
| 2282 |
|
/* |
| 2283 |
|
* Insert nsPtr at the front of the trail list: i.e., at the end |
| 2284 |
|
* of the trailPtr array. |
| 2285 |
|
*/ |
| 2286 |
|
|
| 2287 |
|
trailFront++; |
| 2288 |
|
if (trailFront == trailSize) { |
| 2289 |
|
size_t currBytes = trailSize * sizeof(Namespace *); |
| 2290 |
|
int newSize = 2*trailSize; |
| 2291 |
|
size_t newBytes = newSize * sizeof(Namespace *); |
| 2292 |
|
Namespace **newPtr = |
| 2293 |
|
(Namespace **) ckalloc((unsigned) newBytes); |
| 2294 |
|
|
| 2295 |
|
memcpy((VOID *) newPtr, (VOID *) trailPtr, currBytes); |
| 2296 |
|
if (trailPtr != trailStorage) { |
| 2297 |
|
ckfree((char *) trailPtr); |
| 2298 |
|
} |
| 2299 |
|
trailPtr = newPtr; |
| 2300 |
|
trailSize = newSize; |
| 2301 |
|
} |
| 2302 |
|
trailPtr[trailFront] = nsPtr; |
| 2303 |
|
} |
| 2304 |
|
|
| 2305 |
|
/* |
| 2306 |
|
* Free any allocated storage. |
| 2307 |
|
*/ |
| 2308 |
|
|
| 2309 |
|
if (trailPtr != trailStorage) { |
| 2310 |
|
ckfree((char *) trailPtr); |
| 2311 |
|
} |
| 2312 |
|
} |
| 2313 |
|
|
| 2314 |
|
/* |
| 2315 |
|
*---------------------------------------------------------------------- |
| 2316 |
|
* |
| 2317 |
|
* GetNamespaceFromObj -- |
| 2318 |
|
* |
| 2319 |
|
* Gets the namespace specified by the name in a Tcl_Obj. |
| 2320 |
|
* |
| 2321 |
|
* Results: |
| 2322 |
|
* Returns TCL_OK if the namespace was resolved successfully, and |
| 2323 |
|
* stores a pointer to the namespace in the location specified by |
| 2324 |
|
* nsPtrPtr. If the namespace can't be found, the procedure stores |
| 2325 |
|
* NULL in *nsPtrPtr and returns TCL_OK. If anything else goes wrong, |
| 2326 |
|
* this procedure returns TCL_ERROR. |
| 2327 |
|
* |
| 2328 |
|
* Side effects: |
| 2329 |
|
* May update the internal representation for the object, caching the |
| 2330 |
|
* namespace reference. The next time this procedure is called, the |
| 2331 |
|
* namespace value can be found quickly. |
| 2332 |
|
* |
| 2333 |
|
* If anything goes wrong, an error message is left in the |
| 2334 |
|
* interpreter's result object. |
| 2335 |
|
* |
| 2336 |
|
*---------------------------------------------------------------------- |
| 2337 |
|
*/ |
| 2338 |
|
|
| 2339 |
|
static int |
| 2340 |
|
GetNamespaceFromObj(interp, objPtr, nsPtrPtr) |
| 2341 |
|
Tcl_Interp *interp; /* The current interpreter. */ |
| 2342 |
|
Tcl_Obj *objPtr; /* The object to be resolved as the name |
| 2343 |
|
* of a namespace. */ |
| 2344 |
|
Tcl_Namespace **nsPtrPtr; /* Result namespace pointer goes here. */ |
| 2345 |
|
{ |
| 2346 |
|
register ResolvedNsName *resNamePtr; |
| 2347 |
|
register Namespace *nsPtr; |
| 2348 |
|
Namespace *currNsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
| 2349 |
|
int result; |
| 2350 |
|
|
| 2351 |
|
/* |
| 2352 |
|
* Get the internal representation, converting to a namespace type if |
| 2353 |
|
* needed. The internal representation is a ResolvedNsName that points |
| 2354 |
|
* to the actual namespace. |
| 2355 |
|
*/ |
| 2356 |
|
|
| 2357 |
|
if (objPtr->typePtr != &tclNsNameType) { |
| 2358 |
|
result = tclNsNameType.setFromAnyProc(interp, objPtr); |
| 2359 |
|
if (result != TCL_OK) { |
| 2360 |
|
return TCL_ERROR; |
| 2361 |
|
} |
| 2362 |
|
} |
| 2363 |
|
resNamePtr = (ResolvedNsName *) objPtr->internalRep.otherValuePtr; |
| 2364 |
|
|
| 2365 |
|
/* |
| 2366 |
|
* Check the context namespace of the resolved symbol to make sure that |
| 2367 |
|
* it is fresh. If not, then force another conversion to the namespace |
| 2368 |
|
* type, to discard the old rep and create a new one. Note that we |
| 2369 |
|
* verify that the namespace id of the cached namespace is the same as |
| 2370 |
|
* the id when we cached it; this insures that the namespace wasn't |
| 2371 |
|
* deleted and a new one created at the same address. |
| 2372 |
|
*/ |
| 2373 |
|
|
| 2374 |
|
nsPtr = NULL; |
| 2375 |
|
if ((resNamePtr != NULL) |
| 2376 |
|
&& (resNamePtr->refNsPtr == currNsPtr) |
| 2377 |
|
&& (resNamePtr->nsId == resNamePtr->nsPtr->nsId)) { |
| 2378 |
|
nsPtr = resNamePtr->nsPtr; |
| 2379 |
|
if (nsPtr->flags & NS_DEAD) { |
| 2380 |
|
nsPtr = NULL; |
| 2381 |
|
} |
| 2382 |
|
} |
| 2383 |
|
if (nsPtr == NULL) { /* try again */ |
| 2384 |
|
result = tclNsNameType.setFromAnyProc(interp, objPtr); |
| 2385 |
|
if (result != TCL_OK) { |
| 2386 |
|
return TCL_ERROR; |
| 2387 |
|
} |
| 2388 |
|
resNamePtr = (ResolvedNsName *) objPtr->internalRep.otherValuePtr; |
| 2389 |
|
if (resNamePtr != NULL) { |
| 2390 |
|
nsPtr = resNamePtr->nsPtr; |
| 2391 |
|
if (nsPtr->flags & NS_DEAD) { |
| 2392 |
|
nsPtr = NULL; |
| 2393 |
|
} |
| 2394 |
|
} |
| 2395 |
|
} |
| 2396 |
|
*nsPtrPtr = (Tcl_Namespace *) nsPtr; |
| 2397 |
|
return TCL_OK; |
| 2398 |
|
} |
| 2399 |
|
|
| 2400 |
|
/* |
| 2401 |
|
*---------------------------------------------------------------------- |
| 2402 |
|
* |
| 2403 |
|
* Tcl_NamespaceObjCmd -- |
| 2404 |
|
* |
| 2405 |
|
* Invoked to implement the "namespace" command that creates, deletes, |
| 2406 |
|
* or manipulates Tcl namespaces. Handles the following syntax: |
| 2407 |
|
* |
| 2408 |
|
* namespace children ?name? ?pattern? |
| 2409 |
|
* namespace code arg |
| 2410 |
|
* namespace current |
| 2411 |
|
* namespace delete ?name name...? |
| 2412 |
|
* namespace eval name arg ?arg...? |
| 2413 |
|
* namespace export ?-clear? ?pattern pattern...? |
| 2414 |
|
* namespace forget ?pattern pattern...? |
| 2415 |
|
* namespace import ?-force? ?pattern pattern...? |
| 2416 |
|
* namespace inscope name arg ?arg...? |
| 2417 |
|
* namespace origin name |
| 2418 |
|
* namespace parent ?name? |
| 2419 |
|
* namespace qualifiers string |
| 2420 |
|
* namespace tail string |
| 2421 |
|
* namespace which ?-command? ?-variable? name |
| 2422 |
|
* |
| 2423 |
|
* Results: |
| 2424 |
|
* Returns TCL_OK if the command is successful. Returns TCL_ERROR if |
| 2425 |
|
* anything goes wrong. |
| 2426 |
|
* |
| 2427 |
|
* Side effects: |
| 2428 |
|
* Based on the subcommand name (e.g., "import"), this procedure |
| 2429 |
|
* dispatches to a corresponding procedure NamespaceXXXCmd defined |
| 2430 |
|
* statically in this file. This procedure's side effects depend on |
| 2431 |
|
* whatever that subcommand procedure does. If there is an error, this |
| 2432 |
|
* procedure returns an error message in the interpreter's result |
| 2433 |
|
* object. Otherwise it may return a result in the interpreter's result |
| 2434 |
|
* object. |
| 2435 |
|
* |
| 2436 |
|
*---------------------------------------------------------------------- |
| 2437 |
|
*/ |
| 2438 |
|
|
| 2439 |
|
int |
| 2440 |
|
Tcl_NamespaceObjCmd(clientData, interp, objc, objv) |
| 2441 |
|
ClientData clientData; /* Arbitrary value passed to cmd. */ |
| 2442 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 2443 |
|
register int objc; /* Number of arguments. */ |
| 2444 |
|
register Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 2445 |
|
{ |
| 2446 |
|
static char *subCmds[] = { |
| 2447 |
|
"children", "code", "current", "delete", |
| 2448 |
|
"eval", "export", "forget", "import", |
| 2449 |
|
"inscope", "origin", "parent", "qualifiers", |
| 2450 |
|
"tail", "which", (char *) NULL}; |
| 2451 |
|
enum NSSubCmdIdx { |
| 2452 |
|
NSChildrenIdx, NSCodeIdx, NSCurrentIdx, NSDeleteIdx, |
| 2453 |
|
NSEvalIdx, NSExportIdx, NSForgetIdx, NSImportIdx, |
| 2454 |
|
NSInscopeIdx, NSOriginIdx, NSParentIdx, NSQualifiersIdx, |
| 2455 |
|
NSTailIdx, NSWhichIdx |
| 2456 |
|
}; |
| 2457 |
|
int index, result; |
| 2458 |
|
|
| 2459 |
|
if (objc < 2) { |
| 2460 |
|
Tcl_WrongNumArgs(interp, 1, objv, "subcommand ?arg ...?"); |
| 2461 |
|
return TCL_ERROR; |
| 2462 |
|
} |
| 2463 |
|
|
| 2464 |
|
/* |
| 2465 |
|
* Return an index reflecting the particular subcommand. |
| 2466 |
|
*/ |
| 2467 |
|
|
| 2468 |
|
result = Tcl_GetIndexFromObj((Tcl_Interp *) interp, objv[1], subCmds, |
| 2469 |
|
"option", /*flags*/ 0, (int *) &index); |
| 2470 |
|
if (result != TCL_OK) { |
| 2471 |
|
return result; |
| 2472 |
|
} |
| 2473 |
|
|
| 2474 |
|
switch (index) { |
| 2475 |
|
case NSChildrenIdx: |
| 2476 |
|
result = NamespaceChildrenCmd(clientData, interp, objc, objv); |
| 2477 |
|
break; |
| 2478 |
|
case NSCodeIdx: |
| 2479 |
|
result = NamespaceCodeCmd(clientData, interp, objc, objv); |
| 2480 |
|
break; |
| 2481 |
|
case NSCurrentIdx: |
| 2482 |
|
result = NamespaceCurrentCmd(clientData, interp, objc, objv); |
| 2483 |
|
break; |
| 2484 |
|
case NSDeleteIdx: |
| 2485 |
|
result = NamespaceDeleteCmd(clientData, interp, objc, objv); |
| 2486 |
|
break; |
| 2487 |
|
case NSEvalIdx: |
| 2488 |
|
result = NamespaceEvalCmd(clientData, interp, objc, objv); |
| 2489 |
|
break; |
| 2490 |
|
case NSExportIdx: |
| 2491 |
|
result = NamespaceExportCmd(clientData, interp, objc, objv); |
| 2492 |
|
break; |
| 2493 |
|
case NSForgetIdx: |
| 2494 |
|
result = NamespaceForgetCmd(clientData, interp, objc, objv); |
| 2495 |
|
break; |
| 2496 |
|
case NSImportIdx: |
| 2497 |
|
result = NamespaceImportCmd(clientData, interp, objc, objv); |
| 2498 |
|
break; |
| 2499 |
|
case NSInscopeIdx: |
| 2500 |
|
result = NamespaceInscopeCmd(clientData, interp, objc, objv); |
| 2501 |
|
break; |
| 2502 |
|
case NSOriginIdx: |
| 2503 |
|
result = NamespaceOriginCmd(clientData, interp, objc, objv); |
| 2504 |
|
break; |
| 2505 |
|
case NSParentIdx: |
| 2506 |
|
result = NamespaceParentCmd(clientData, interp, objc, objv); |
| 2507 |
|
break; |
| 2508 |
|
case NSQualifiersIdx: |
| 2509 |
|
result = NamespaceQualifiersCmd(clientData, interp, objc, objv); |
| 2510 |
|
break; |
| 2511 |
|
case NSTailIdx: |
| 2512 |
|
result = NamespaceTailCmd(clientData, interp, objc, objv); |
| 2513 |
|
break; |
| 2514 |
|
case NSWhichIdx: |
| 2515 |
|
result = NamespaceWhichCmd(clientData, interp, objc, objv); |
| 2516 |
|
break; |
| 2517 |
|
} |
| 2518 |
|
return result; |
| 2519 |
|
} |
| 2520 |
|
|
| 2521 |
|
/* |
| 2522 |
|
*---------------------------------------------------------------------- |
| 2523 |
|
* |
| 2524 |
|
* NamespaceChildrenCmd -- |
| 2525 |
|
* |
| 2526 |
|
* Invoked to implement the "namespace children" command that returns a |
| 2527 |
|
* list containing the fully-qualified names of the child namespaces of |
| 2528 |
|
* a given namespace. Handles the following syntax: |
| 2529 |
|
* |
| 2530 |
|
* namespace children ?name? ?pattern? |
| 2531 |
|
* |
| 2532 |
|
* Results: |
| 2533 |
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
| 2534 |
|
* |
| 2535 |
|
* Side effects: |
| 2536 |
|
* Returns a result in the interpreter's result object. If anything |
| 2537 |
|
* goes wrong, the result is an error message. |
| 2538 |
|
* |
| 2539 |
|
*---------------------------------------------------------------------- |
| 2540 |
|
*/ |
| 2541 |
|
|
| 2542 |
|
static int |
| 2543 |
|
NamespaceChildrenCmd(dummy, interp, objc, objv) |
| 2544 |
|
ClientData dummy; /* Not used. */ |
| 2545 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 2546 |
|
int objc; /* Number of arguments. */ |
| 2547 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 2548 |
|
{ |
| 2549 |
|
Tcl_Namespace *namespacePtr; |
| 2550 |
|
Namespace *nsPtr, *childNsPtr; |
| 2551 |
|
Namespace *globalNsPtr = (Namespace *) Tcl_GetGlobalNamespace(interp); |
| 2552 |
|
char *pattern = NULL; |
| 2553 |
|
Tcl_DString buffer; |
| 2554 |
|
register Tcl_HashEntry *entryPtr; |
| 2555 |
|
Tcl_HashSearch search; |
| 2556 |
|
Tcl_Obj *listPtr, *elemPtr; |
| 2557 |
|
|
| 2558 |
|
/* |
| 2559 |
|
* Get a pointer to the specified namespace, or the current namespace. |
| 2560 |
|
*/ |
| 2561 |
|
|
| 2562 |
|
if (objc == 2) { |
| 2563 |
|
nsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
| 2564 |
|
} else if ((objc == 3) || (objc == 4)) { |
| 2565 |
|
if (GetNamespaceFromObj(interp, objv[2], &namespacePtr) != TCL_OK) { |
| 2566 |
|
return TCL_ERROR; |
| 2567 |
|
} |
| 2568 |
|
if (namespacePtr == NULL) { |
| 2569 |
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
| 2570 |
|
"unknown namespace \"", Tcl_GetString(objv[2]), |
| 2571 |
|
"\" in namespace children command", (char *) NULL); |
| 2572 |
|
return TCL_ERROR; |
| 2573 |
|
} |
| 2574 |
|
nsPtr = (Namespace *) namespacePtr; |
| 2575 |
|
} else { |
| 2576 |
|
Tcl_WrongNumArgs(interp, 2, objv, "?name? ?pattern?"); |
| 2577 |
|
return TCL_ERROR; |
| 2578 |
|
} |
| 2579 |
|
|
| 2580 |
|
/* |
| 2581 |
|
* Get the glob-style pattern, if any, used to narrow the search. |
| 2582 |
|
*/ |
| 2583 |
|
|
| 2584 |
|
Tcl_DStringInit(&buffer); |
| 2585 |
|
if (objc == 4) { |
| 2586 |
|
char *name = Tcl_GetString(objv[3]); |
| 2587 |
|
|
| 2588 |
|
if ((*name == ':') && (*(name+1) == ':')) { |
| 2589 |
|
pattern = name; |
| 2590 |
|
} else { |
| 2591 |
|
Tcl_DStringAppend(&buffer, nsPtr->fullName, -1); |
| 2592 |
|
if (nsPtr != globalNsPtr) { |
| 2593 |
|
Tcl_DStringAppend(&buffer, "::", 2); |
| 2594 |
|
} |
| 2595 |
|
Tcl_DStringAppend(&buffer, name, -1); |
| 2596 |
|
pattern = Tcl_DStringValue(&buffer); |
| 2597 |
|
} |
| 2598 |
|
} |
| 2599 |
|
|
| 2600 |
|
/* |
| 2601 |
|
* Create a list containing the full names of all child namespaces |
| 2602 |
|
* whose names match the specified pattern, if any. |
| 2603 |
|
*/ |
| 2604 |
|
|
| 2605 |
|
listPtr = Tcl_NewListObj(0, (Tcl_Obj **) NULL); |
| 2606 |
|
entryPtr = Tcl_FirstHashEntry(&nsPtr->childTable, &search); |
| 2607 |
|
while (entryPtr != NULL) { |
| 2608 |
|
childNsPtr = (Namespace *) Tcl_GetHashValue(entryPtr); |
| 2609 |
|
if ((pattern == NULL) |
| 2610 |
|
|| Tcl_StringMatch(childNsPtr->fullName, pattern)) { |
| 2611 |
|
elemPtr = Tcl_NewStringObj(childNsPtr->fullName, -1); |
| 2612 |
|
Tcl_ListObjAppendElement(interp, listPtr, elemPtr); |
| 2613 |
|
} |
| 2614 |
|
entryPtr = Tcl_NextHashEntry(&search); |
| 2615 |
|
} |
| 2616 |
|
|
| 2617 |
|
Tcl_SetObjResult(interp, listPtr); |
| 2618 |
|
Tcl_DStringFree(&buffer); |
| 2619 |
|
return TCL_OK; |
| 2620 |
|
} |
| 2621 |
|
|
| 2622 |
|
/* |
| 2623 |
|
*---------------------------------------------------------------------- |
| 2624 |
|
* |
| 2625 |
|
* NamespaceCodeCmd -- |
| 2626 |
|
* |
| 2627 |
|
* Invoked to implement the "namespace code" command to capture the |
| 2628 |
|
* namespace context of a command. Handles the following syntax: |
| 2629 |
|
* |
| 2630 |
|
* namespace code arg |
| 2631 |
|
* |
| 2632 |
|
* Here "arg" can be a list. "namespace code arg" produces a result |
| 2633 |
|
* equivalent to that produced by the command |
| 2634 |
|
* |
| 2635 |
|
* list namespace inscope [namespace current] $arg |
| 2636 |
|
* |
| 2637 |
|
* However, if "arg" is itself a scoped value starting with |
| 2638 |
|
* "namespace inscope", then the result is just "arg". |
| 2639 |
|
* |
| 2640 |
|
* Results: |
| 2641 |
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
| 2642 |
|
* |
| 2643 |
|
* Side effects: |
| 2644 |
|
* If anything goes wrong, this procedure returns an error |
| 2645 |
|
* message as the result in the interpreter's result object. |
| 2646 |
|
* |
| 2647 |
|
*---------------------------------------------------------------------- |
| 2648 |
|
*/ |
| 2649 |
|
|
| 2650 |
|
static int |
| 2651 |
|
NamespaceCodeCmd(dummy, interp, objc, objv) |
| 2652 |
|
ClientData dummy; /* Not used. */ |
| 2653 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 2654 |
|
int objc; /* Number of arguments. */ |
| 2655 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 2656 |
|
{ |
| 2657 |
|
Namespace *currNsPtr; |
| 2658 |
|
Tcl_Obj *listPtr, *objPtr; |
| 2659 |
|
register char *arg, *p; |
| 2660 |
|
int length; |
| 2661 |
|
|
| 2662 |
|
if (objc != 3) { |
| 2663 |
|
Tcl_WrongNumArgs(interp, 2, objv, "arg"); |
| 2664 |
|
return TCL_ERROR; |
| 2665 |
|
} |
| 2666 |
|
|
| 2667 |
|
/* |
| 2668 |
|
* If "arg" is already a scoped value, then return it directly. |
| 2669 |
|
*/ |
| 2670 |
|
|
| 2671 |
|
arg = Tcl_GetStringFromObj(objv[2], &length); |
| 2672 |
|
if ((*arg == 'n') && (length > 17) |
| 2673 |
|
&& (strncmp(arg, "namespace", 9) == 0)) { |
| 2674 |
|
for (p = (arg + 9); (*p == ' '); p++) { |
| 2675 |
|
/* empty body: skip over spaces */ |
| 2676 |
|
} |
| 2677 |
|
if ((*p == 'i') && ((p + 7) <= (arg + length)) |
| 2678 |
|
&& (strncmp(p, "inscope", 7) == 0)) { |
| 2679 |
|
Tcl_SetObjResult(interp, objv[2]); |
| 2680 |
|
return TCL_OK; |
| 2681 |
|
} |
| 2682 |
|
} |
| 2683 |
|
|
| 2684 |
|
/* |
| 2685 |
|
* Otherwise, construct a scoped command by building a list with |
| 2686 |
|
* "namespace inscope", the full name of the current namespace, and |
| 2687 |
|
* the argument "arg". By constructing a list, we ensure that scoped |
| 2688 |
|
* commands are interpreted properly when they are executed later, |
| 2689 |
|
* by the "namespace inscope" command. |
| 2690 |
|
*/ |
| 2691 |
|
|
| 2692 |
|
listPtr = Tcl_NewListObj(0, (Tcl_Obj **) NULL); |
| 2693 |
|
Tcl_ListObjAppendElement(interp, listPtr, |
| 2694 |
|
Tcl_NewStringObj("namespace", -1)); |
| 2695 |
|
Tcl_ListObjAppendElement(interp, listPtr, |
| 2696 |
|
Tcl_NewStringObj("inscope", -1)); |
| 2697 |
|
|
| 2698 |
|
currNsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
| 2699 |
|
if (currNsPtr == (Namespace *) Tcl_GetGlobalNamespace(interp)) { |
| 2700 |
|
objPtr = Tcl_NewStringObj("::", -1); |
| 2701 |
|
} else { |
| 2702 |
|
objPtr = Tcl_NewStringObj(currNsPtr->fullName, -1); |
| 2703 |
|
} |
| 2704 |
|
Tcl_ListObjAppendElement(interp, listPtr, objPtr); |
| 2705 |
|
|
| 2706 |
|
Tcl_ListObjAppendElement(interp, listPtr, objv[2]); |
| 2707 |
|
|
| 2708 |
|
Tcl_SetObjResult(interp, listPtr); |
| 2709 |
|
return TCL_OK; |
| 2710 |
|
} |
| 2711 |
|
|
| 2712 |
|
/* |
| 2713 |
|
*---------------------------------------------------------------------- |
| 2714 |
|
* |
| 2715 |
|
* NamespaceCurrentCmd -- |
| 2716 |
|
* |
| 2717 |
|
* Invoked to implement the "namespace current" command which returns |
| 2718 |
|
* the fully-qualified name of the current namespace. Handles the |
| 2719 |
|
* following syntax: |
| 2720 |
|
* |
| 2721 |
|
* namespace current |
| 2722 |
|
* |
| 2723 |
|
* Results: |
| 2724 |
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
| 2725 |
|
* |
| 2726 |
|
* Side effects: |
| 2727 |
|
* Returns a result in the interpreter's result object. If anything |
| 2728 |
|
* goes wrong, the result is an error message. |
| 2729 |
|
* |
| 2730 |
|
*---------------------------------------------------------------------- |
| 2731 |
|
*/ |
| 2732 |
|
|
| 2733 |
|
static int |
| 2734 |
|
NamespaceCurrentCmd(dummy, interp, objc, objv) |
| 2735 |
|
ClientData dummy; /* Not used. */ |
| 2736 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 2737 |
|
int objc; /* Number of arguments. */ |
| 2738 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 2739 |
|
{ |
| 2740 |
|
register Namespace *currNsPtr; |
| 2741 |
|
|
| 2742 |
|
if (objc != 2) { |
| 2743 |
|
Tcl_WrongNumArgs(interp, 2, objv, NULL); |
| 2744 |
|
return TCL_ERROR; |
| 2745 |
|
} |
| 2746 |
|
|
| 2747 |
|
/* |
| 2748 |
|
* The "real" name of the global namespace ("::") is the null string, |
| 2749 |
|
* but we return "::" for it as a convenience to programmers. Note that |
| 2750 |
|
* "" and "::" are treated as synonyms by the namespace code so that it |
| 2751 |
|
* is still easy to do things like: |
| 2752 |
|
* |
| 2753 |
|
* namespace [namespace current]::bar { ... } |
| 2754 |
|
*/ |
| 2755 |
|
|
| 2756 |
|
currNsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); |
| 2757 |
|
if (currNsPtr == (Namespace *) Tcl_GetGlobalNamespace(interp)) { |
| 2758 |
|
Tcl_AppendToObj(Tcl_GetObjResult(interp), "::", -1); |
| 2759 |
|
} else { |
| 2760 |
|
Tcl_AppendToObj(Tcl_GetObjResult(interp), currNsPtr->fullName, -1); |
| 2761 |
|
} |
| 2762 |
|
return TCL_OK; |
| 2763 |
|
} |
| 2764 |
|
|
| 2765 |
|
/* |
| 2766 |
|
*---------------------------------------------------------------------- |
| 2767 |
|
* |
| 2768 |
|
* NamespaceDeleteCmd -- |
| 2769 |
|
* |
| 2770 |
|
* Invoked to implement the "namespace delete" command to delete |
| 2771 |
|
* namespace(s). Handles the following syntax: |
| 2772 |
|
* |
| 2773 |
|
* namespace delete ?name name...? |
| 2774 |
|
* |
| 2775 |
|
* Each name identifies a namespace. It may include a sequence of |
| 2776 |
|
* namespace qualifiers separated by "::"s. If a namespace is found, it |
| 2777 |
|
* is deleted: all variables and procedures contained in that namespace |
| 2778 |
|
* are deleted. If that namespace is being used on the call stack, it |
| 2779 |
|
* is kept alive (but logically deleted) until it is removed from the |
| 2780 |
|
* call stack: that is, it can no longer be referenced by name but any |
| 2781 |
|
* currently executing procedure that refers to it is allowed to do so |
| 2782 |
|
* until the procedure returns. If the namespace can't be found, this |
| 2783 |
|
* procedure returns an error. If no namespaces are specified, this |
| 2784 |
|
* command does nothing. |
| 2785 |
|
* |
| 2786 |
|
* Results: |
| 2787 |
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
| 2788 |
|
* |
| 2789 |
|
* Side effects: |
| 2790 |
|
* Deletes the specified namespaces. If anything goes wrong, this |
| 2791 |
|
* procedure returns an error message in the interpreter's |
| 2792 |
|
* result object. |
| 2793 |
|
* |
| 2794 |
|
*---------------------------------------------------------------------- |
| 2795 |
|
*/ |
| 2796 |
|
|
| 2797 |
|
static int |
| 2798 |
|
NamespaceDeleteCmd(dummy, interp, objc, objv) |
| 2799 |
|
ClientData dummy; /* Not used. */ |
| 2800 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 2801 |
|
int objc; /* Number of arguments. */ |
| 2802 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 2803 |
|
{ |
| 2804 |
|
Tcl_Namespace *namespacePtr; |
| 2805 |
|
char *name; |
| 2806 |
|
register int i; |
| 2807 |
|
|
| 2808 |
|
if (objc < 2) { |
| 2809 |
|
Tcl_WrongNumArgs(interp, 2, objv, "?name name...?"); |
| 2810 |
|
return TCL_ERROR; |
| 2811 |
|
} |
| 2812 |
|
|
| 2813 |
|
/* |
| 2814 |
|
* Destroying one namespace may cause another to be destroyed. Break |
| 2815 |
|
* this into two passes: first check to make sure that all namespaces on |
| 2816 |
|
* the command line are valid, and report any errors. |
| 2817 |
|
*/ |
| 2818 |
|
|
| 2819 |
|
for (i = 2; i < objc; i++) { |
| 2820 |
|
name = Tcl_GetString(objv[i]); |
| 2821 |
|
namespacePtr = Tcl_FindNamespace(interp, name, |
| 2822 |
|
(Tcl_Namespace *) NULL, /*flags*/ 0); |
| 2823 |
|
if (namespacePtr == NULL) { |
| 2824 |
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
| 2825 |
|
"unknown namespace \"", Tcl_GetString(objv[i]), |
| 2826 |
|
"\" in namespace delete command", (char *) NULL); |
| 2827 |
|
return TCL_ERROR; |
| 2828 |
|
} |
| 2829 |
|
} |
| 2830 |
|
|
| 2831 |
|
/* |
| 2832 |
|
* Okay, now delete each namespace. |
| 2833 |
|
*/ |
| 2834 |
|
|
| 2835 |
|
for (i = 2; i < objc; i++) { |
| 2836 |
|
name = Tcl_GetString(objv[i]); |
| 2837 |
|
namespacePtr = Tcl_FindNamespace(interp, name, |
| 2838 |
|
(Tcl_Namespace *) NULL, /* flags */ 0); |
| 2839 |
|
if (namespacePtr) { |
| 2840 |
|
Tcl_DeleteNamespace(namespacePtr); |
| 2841 |
|
} |
| 2842 |
|
} |
| 2843 |
|
return TCL_OK; |
| 2844 |
|
} |
| 2845 |
|
|
| 2846 |
|
/* |
| 2847 |
|
*---------------------------------------------------------------------- |
| 2848 |
|
* |
| 2849 |
|
* NamespaceEvalCmd -- |
| 2850 |
|
* |
| 2851 |
|
* Invoked to implement the "namespace eval" command. Executes |
| 2852 |
|
* commands in a namespace. If the namespace does not already exist, |
| 2853 |
|
* it is created. Handles the following syntax: |
| 2854 |
|
* |
| 2855 |
|
* namespace eval name arg ?arg...? |
| 2856 |
|
* |
| 2857 |
|
* If more than one arg argument is specified, the command that is |
| 2858 |
|
* executed is the result of concatenating the arguments together with |
| 2859 |
|
* a space between each argument. |
| 2860 |
|
* |
| 2861 |
|
* Results: |
| 2862 |
|
* Returns TCL_OK if the namespace is found and the commands are |
| 2863 |
|
* executed successfully. Returns TCL_ERROR if anything goes wrong. |
| 2864 |
|
* |
| 2865 |
|
* Side effects: |
| 2866 |
|
* Returns the result of the command in the interpreter's result |
| 2867 |
|
* object. If anything goes wrong, this procedure returns an error |
| 2868 |
|
* message as the result. |
| 2869 |
|
* |
| 2870 |
|
*---------------------------------------------------------------------- |
| 2871 |
|
*/ |
| 2872 |
|
|
| 2873 |
|
static int |
| 2874 |
|
NamespaceEvalCmd(dummy, interp, objc, objv) |
| 2875 |
|
ClientData dummy; /* Not used. */ |
| 2876 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 2877 |
|
int objc; /* Number of arguments. */ |
| 2878 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 2879 |
|
{ |
| 2880 |
|
Tcl_Namespace *namespacePtr; |
| 2881 |
|
Tcl_CallFrame frame; |
| 2882 |
|
Tcl_Obj *objPtr; |
| 2883 |
|
char *name; |
| 2884 |
|
int length, result; |
| 2885 |
|
|
| 2886 |
|
if (objc < 4) { |
| 2887 |
|
Tcl_WrongNumArgs(interp, 2, objv, "name arg ?arg...?"); |
| 2888 |
|
return TCL_ERROR; |
| 2889 |
|
} |
| 2890 |
|
|
| 2891 |
|
/* |
| 2892 |
|
* Try to resolve the namespace reference, caching the result in the |
| 2893 |
|
* namespace object along the way. |
| 2894 |
|
*/ |
| 2895 |
|
|
| 2896 |
|
result = GetNamespaceFromObj(interp, objv[2], &namespacePtr); |
| 2897 |
|
if (result != TCL_OK) { |
| 2898 |
|
return result; |
| 2899 |
|
} |
| 2900 |
|
|
| 2901 |
|
/* |
| 2902 |
|
* If the namespace wasn't found, try to create it. |
| 2903 |
|
*/ |
| 2904 |
|
|
| 2905 |
|
if (namespacePtr == NULL) { |
| 2906 |
|
name = Tcl_GetStringFromObj(objv[2], &length); |
| 2907 |
|
namespacePtr = Tcl_CreateNamespace(interp, name, (ClientData) NULL, |
| 2908 |
|
(Tcl_NamespaceDeleteProc *) NULL); |
| 2909 |
|
if (namespacePtr == NULL) { |
| 2910 |
|
return TCL_ERROR; |
| 2911 |
|
} |
| 2912 |
|
} |
| 2913 |
|
|
| 2914 |
|
/* |
| 2915 |
|
* Make the specified namespace the current namespace and evaluate |
| 2916 |
|
* the command(s). |
| 2917 |
|
*/ |
| 2918 |
|
|
| 2919 |
|
result = Tcl_PushCallFrame(interp, &frame, namespacePtr, |
| 2920 |
|
/*isProcCallFrame*/ 0); |
| 2921 |
|
if (result != TCL_OK) { |
| 2922 |
|
return TCL_ERROR; |
| 2923 |
|
} |
| 2924 |
|
|
| 2925 |
|
if (objc == 4) { |
| 2926 |
|
result = Tcl_EvalObjEx(interp, objv[3], 0); |
| 2927 |
|
} else { |
| 2928 |
|
/* |
| 2929 |
|
* More than one argument: concatenate them together with spaces |
| 2930 |
|
* between, then evaluate the result. Tcl_EvalObjEx will delete |
| 2931 |
|
* the object when it decrements its refcount after eval'ing it. |
| 2932 |
|
*/ |
| 2933 |
|
objPtr = Tcl_ConcatObj(objc-3, objv+3); |
| 2934 |
|
result = Tcl_EvalObjEx(interp, objPtr, TCL_EVAL_DIRECT); |
| 2935 |
|
} |
| 2936 |
|
if (result == TCL_ERROR) { |
| 2937 |
|
char msg[256 + TCL_INTEGER_SPACE]; |
| 2938 |
|
|
| 2939 |
|
sprintf(msg, "\n (in namespace eval \"%.200s\" script line %d)", |
| 2940 |
|
namespacePtr->fullName, interp->errorLine); |
| 2941 |
|
Tcl_AddObjErrorInfo(interp, msg, -1); |
| 2942 |
|
} |
| 2943 |
|
|
| 2944 |
|
/* |
| 2945 |
|
* Restore the previous "current" namespace. |
| 2946 |
|
*/ |
| 2947 |
|
|
| 2948 |
|
Tcl_PopCallFrame(interp); |
| 2949 |
|
return result; |
| 2950 |
|
} |
| 2951 |
|
|
| 2952 |
|
/* |
| 2953 |
|
*---------------------------------------------------------------------- |
| 2954 |
|
* |
| 2955 |
|
* NamespaceExportCmd -- |
| 2956 |
|
* |
| 2957 |
|
* Invoked to implement the "namespace export" command that specifies |
| 2958 |
|
* which commands are exported from a namespace. The exported commands |
| 2959 |
|
* are those that can be imported into another namespace using |
| 2960 |
|
* "namespace import". Both commands defined in a namespace and |
| 2961 |
|
* commands the namespace has imported can be exported by a |
| 2962 |
|
* namespace. This command has the following syntax: |
| 2963 |
|
* |
| 2964 |
|
* namespace export ?-clear? ?pattern pattern...? |
| 2965 |
|
* |
| 2966 |
|
* Each pattern may contain "string match"-style pattern matching |
| 2967 |
|
* special characters, but the pattern may not include any namespace |
| 2968 |
|
* qualifiers: that is, the pattern must specify commands in the |
| 2969 |
|
* current (exporting) namespace. The specified patterns are appended |
| 2970 |
|
* onto the namespace's list of export patterns. |
| 2971 |
|
* |
| 2972 |
|
* To reset the namespace's export pattern list, specify the "-clear" |
| 2973 |
|
* flag. |
| 2974 |
|
* |
| 2975 |
|
* If there are no export patterns and the "-clear" flag isn't given, |
| 2976 |
|
* this command returns the namespace's current export list. |
| 2977 |
|
* |
| 2978 |
|
* Results: |
| 2979 |
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
| 2980 |
|
* |
| 2981 |
|
* Side effects: |
| 2982 |
|
* Returns a result in the interpreter's result object. If anything |
| 2983 |
|
* goes wrong, the result is an error message. |
| 2984 |
|
* |
| 2985 |
|
*---------------------------------------------------------------------- |
| 2986 |
|
*/ |
| 2987 |
|
|
| 2988 |
|
static int |
| 2989 |
|
NamespaceExportCmd(dummy, interp, objc, objv) |
| 2990 |
|
ClientData dummy; /* Not used. */ |
| 2991 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 2992 |
|
int objc; /* Number of arguments. */ |
| 2993 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 2994 |
|
{ |
| 2995 |
|
Namespace *currNsPtr = (Namespace*) Tcl_GetCurrentNamespace(interp); |
| 2996 |
|
char *pattern, *string; |
| 2997 |
|
int resetListFirst = 0; |
| 2998 |
|
int firstArg, patternCt, i, result; |
| 2999 |
|
|
| 3000 |
|
if (objc < 2) { |
| 3001 |
|
Tcl_WrongNumArgs(interp, 2, objv, |
| 3002 |
|
"?-clear? ?pattern pattern...?"); |
| 3003 |
|
return TCL_ERROR; |
| 3004 |
|
} |
| 3005 |
|
|
| 3006 |
|
/* |
| 3007 |
|
* Process the optional "-clear" argument. |
| 3008 |
|
*/ |
| 3009 |
|
|
| 3010 |
|
firstArg = 2; |
| 3011 |
|
if (firstArg < objc) { |
| 3012 |
|
string = Tcl_GetString(objv[firstArg]); |
| 3013 |
|
if (strcmp(string, "-clear") == 0) { |
| 3014 |
|
resetListFirst = 1; |
| 3015 |
|
firstArg++; |
| 3016 |
|
} |
| 3017 |
|
} |
| 3018 |
|
|
| 3019 |
|
/* |
| 3020 |
|
* If no pattern arguments are given, and "-clear" isn't specified, |
| 3021 |
|
* return the namespace's current export pattern list. |
| 3022 |
|
*/ |
| 3023 |
|
|
| 3024 |
|
patternCt = (objc - firstArg); |
| 3025 |
|
if (patternCt == 0) { |
| 3026 |
|
if (firstArg > 2) { |
| 3027 |
|
return TCL_OK; |
| 3028 |
|
} else { /* create list with export patterns */ |
| 3029 |
|
Tcl_Obj *listPtr = Tcl_NewListObj(0, (Tcl_Obj **) NULL); |
| 3030 |
|
result = Tcl_AppendExportList(interp, |
| 3031 |
|
(Tcl_Namespace *) currNsPtr, listPtr); |
| 3032 |
|
if (result != TCL_OK) { |
| 3033 |
|
return result; |
| 3034 |
|
} |
| 3035 |
|
Tcl_SetObjResult(interp, listPtr); |
| 3036 |
|
return TCL_OK; |
| 3037 |
|
} |
| 3038 |
|
} |
| 3039 |
|
|
| 3040 |
|
/* |
| 3041 |
|
* Add each pattern to the namespace's export pattern list. |
| 3042 |
|
*/ |
| 3043 |
|
|
| 3044 |
|
for (i = firstArg; i < objc; i++) { |
| 3045 |
|
pattern = Tcl_GetString(objv[i]); |
| 3046 |
|
result = Tcl_Export(interp, (Tcl_Namespace *) currNsPtr, pattern, |
| 3047 |
|
((i == firstArg)? resetListFirst : 0)); |
| 3048 |
|
if (result != TCL_OK) { |
| 3049 |
|
return result; |
| 3050 |
|
} |
| 3051 |
|
} |
| 3052 |
|
return TCL_OK; |
| 3053 |
|
} |
| 3054 |
|
|
| 3055 |
|
/* |
| 3056 |
|
*---------------------------------------------------------------------- |
| 3057 |
|
* |
| 3058 |
|
* NamespaceForgetCmd -- |
| 3059 |
|
* |
| 3060 |
|
* Invoked to implement the "namespace forget" command to remove |
| 3061 |
|
* imported commands from a namespace. Handles the following syntax: |
| 3062 |
|
* |
| 3063 |
|
* namespace forget ?pattern pattern...? |
| 3064 |
|
* |
| 3065 |
|
* Each pattern is a name like "foo::*" or "a::b::x*". That is, the |
| 3066 |
|
* pattern may include the special pattern matching characters |
| 3067 |
|
* recognized by the "string match" command, but only in the command |
| 3068 |
|
* name at the end of the qualified name; the special pattern |
| 3069 |
|
* characters may not appear in a namespace name. All of the commands |
| 3070 |
|
* that match that pattern are checked to see if they have an imported |
| 3071 |
|
* command in the current namespace that refers to the matched |
| 3072 |
|
* command. If there is an alias, it is removed. |
| 3073 |
|
* |
| 3074 |
|
* Results: |
| 3075 |
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
| 3076 |
|
* |
| 3077 |
|
* Side effects: |
| 3078 |
|
* Imported commands are removed from the current namespace. If |
| 3079 |
|
* anything goes wrong, this procedure returns an error message in the |
| 3080 |
|
* interpreter's result object. |
| 3081 |
|
* |
| 3082 |
|
*---------------------------------------------------------------------- |
| 3083 |
|
*/ |
| 3084 |
|
|
| 3085 |
|
static int |
| 3086 |
|
NamespaceForgetCmd(dummy, interp, objc, objv) |
| 3087 |
|
ClientData dummy; /* Not used. */ |
| 3088 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 3089 |
|
int objc; /* Number of arguments. */ |
| 3090 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 3091 |
|
{ |
| 3092 |
|
char *pattern; |
| 3093 |
|
register int i, result; |
| 3094 |
|
|
| 3095 |
|
if (objc < 2) { |
| 3096 |
|
Tcl_WrongNumArgs(interp, 2, objv, "?pattern pattern...?"); |
| 3097 |
|
return TCL_ERROR; |
| 3098 |
|
} |
| 3099 |
|
|
| 3100 |
|
for (i = 2; i < objc; i++) { |
| 3101 |
|
pattern = Tcl_GetString(objv[i]); |
| 3102 |
|
result = Tcl_ForgetImport(interp, (Tcl_Namespace *) NULL, pattern); |
| 3103 |
|
if (result != TCL_OK) { |
| 3104 |
|
return result; |
| 3105 |
|
} |
| 3106 |
|
} |
| 3107 |
|
return TCL_OK; |
| 3108 |
|
} |
| 3109 |
|
|
| 3110 |
|
/* |
| 3111 |
|
*---------------------------------------------------------------------- |
| 3112 |
|
* |
| 3113 |
|
* NamespaceImportCmd -- |
| 3114 |
|
* |
| 3115 |
|
* Invoked to implement the "namespace import" command that imports |
| 3116 |
|
* commands into a namespace. Handles the following syntax: |
| 3117 |
|
* |
| 3118 |
|
* namespace import ?-force? ?pattern pattern...? |
| 3119 |
|
* |
| 3120 |
|
* Each pattern is a namespace-qualified name like "foo::*", |
| 3121 |
|
* "a::b::x*", or "bar::p". That is, the pattern may include the |
| 3122 |
|
* special pattern matching characters recognized by the "string match" |
| 3123 |
|
* command, but only in the command name at the end of the qualified |
| 3124 |
|
* name; the special pattern characters may not appear in a namespace |
| 3125 |
|
* name. All of the commands that match the pattern and which are |
| 3126 |
|
* exported from their namespace are made accessible from the current |
| 3127 |
|
* namespace context. This is done by creating a new "imported command" |
| 3128 |
|
* in the current namespace that points to the real command in its |
| 3129 |
|
* original namespace; when the imported command is called, it invokes |
| 3130 |
|
* the real command. |
| 3131 |
|
* |
| 3132 |
|
* If an imported command conflicts with an existing command, it is |
| 3133 |
|
* treated as an error. But if the "-force" option is included, then |
| 3134 |
|
* existing commands are overwritten by the imported commands. |
| 3135 |
|
* |
| 3136 |
|
* Results: |
| 3137 |
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
| 3138 |
|
* |
| 3139 |
|
* Side effects: |
| 3140 |
|
* Adds imported commands to the current namespace. If anything goes |
| 3141 |
|
* wrong, this procedure returns an error message in the interpreter's |
| 3142 |
|
* result object. |
| 3143 |
|
* |
| 3144 |
|
*---------------------------------------------------------------------- |
| 3145 |
|
*/ |
| 3146 |
|
|
| 3147 |
|
static int |
| 3148 |
|
NamespaceImportCmd(dummy, interp, objc, objv) |
| 3149 |
|
ClientData dummy; /* Not used. */ |
| 3150 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 3151 |
|
int objc; /* Number of arguments. */ |
| 3152 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 3153 |
|
{ |
| 3154 |
|
int allowOverwrite = 0; |
| 3155 |
|
char *string, *pattern; |
| 3156 |
|
register int i, result; |
| 3157 |
|
int firstArg; |
| 3158 |
|
|
| 3159 |
|
if (objc < 2) { |
| 3160 |
|
Tcl_WrongNumArgs(interp, 2, objv, |
| 3161 |
|
"?-force? ?pattern pattern...?"); |
| 3162 |
|
return TCL_ERROR; |
| 3163 |
|
} |
| 3164 |
|
|
| 3165 |
|
/* |
| 3166 |
|
* Skip over the optional "-force" as the first argument. |
| 3167 |
|
*/ |
| 3168 |
|
|
| 3169 |
|
firstArg = 2; |
| 3170 |
|
if (firstArg < objc) { |
| 3171 |
|
string = Tcl_GetString(objv[firstArg]); |
| 3172 |
|
if ((*string == '-') && (strcmp(string, "-force") == 0)) { |
| 3173 |
|
allowOverwrite = 1; |
| 3174 |
|
firstArg++; |
| 3175 |
|
} |
| 3176 |
|
} |
| 3177 |
|
|
| 3178 |
|
/* |
| 3179 |
|
* Handle the imports for each of the patterns. |
| 3180 |
|
*/ |
| 3181 |
|
|
| 3182 |
|
for (i = firstArg; i < objc; i++) { |
| 3183 |
|
pattern = Tcl_GetString(objv[i]); |
| 3184 |
|
result = Tcl_Import(interp, (Tcl_Namespace *) NULL, pattern, |
| 3185 |
|
allowOverwrite); |
| 3186 |
|
if (result != TCL_OK) { |
| 3187 |
|
return result; |
| 3188 |
|
} |
| 3189 |
|
} |
| 3190 |
|
return TCL_OK; |
| 3191 |
|
} |
| 3192 |
|
|
| 3193 |
|
/* |
| 3194 |
|
*---------------------------------------------------------------------- |
| 3195 |
|
* |
| 3196 |
|
* NamespaceInscopeCmd -- |
| 3197 |
|
* |
| 3198 |
|
* Invoked to implement the "namespace inscope" command that executes a |
| 3199 |
|
* script in the context of a particular namespace. This command is not |
| 3200 |
|
* expected to be used directly by programmers; calls to it are |
| 3201 |
|
* generated implicitly when programs use "namespace code" commands |
| 3202 |
|
* to register callback scripts. Handles the following syntax: |
| 3203 |
|
* |
| 3204 |
|
* namespace inscope name arg ?arg...? |
| 3205 |
|
* |
| 3206 |
|
* The "namespace inscope" command is much like the "namespace eval" |
| 3207 |
|
* command except that it has lappend semantics and the namespace must |
| 3208 |
|
* already exist. It treats the first argument as a list, and appends |
| 3209 |
|
* any arguments after the first onto the end as proper list elements. |
| 3210 |
|
* For example, |
| 3211 |
|
* |
| 3212 |
|
* namespace inscope ::foo a b c d |
| 3213 |
|
* |
| 3214 |
|
* is equivalent to |
| 3215 |
|
* |
| 3216 |
|
* namespace eval ::foo [concat a [list b c d]] |
| 3217 |
|
* |
| 3218 |
|
* This lappend semantics is important because many callback scripts |
| 3219 |
|
* are actually prefixes. |
| 3220 |
|
* |
| 3221 |
|
* Results: |
| 3222 |
|
* Returns TCL_OK to indicate success, or TCL_ERROR to indicate |
| 3223 |
|
* failure. |
| 3224 |
|
* |
| 3225 |
|
* Side effects: |
| 3226 |
|
* Returns a result in the Tcl interpreter's result object. |
| 3227 |
|
* |
| 3228 |
|
*---------------------------------------------------------------------- |
| 3229 |
|
*/ |
| 3230 |
|
|
| 3231 |
|
static int |
| 3232 |
|
NamespaceInscopeCmd(dummy, interp, objc, objv) |
| 3233 |
|
ClientData dummy; /* Not used. */ |
| 3234 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 3235 |
|
int objc; /* Number of arguments. */ |
| 3236 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 3237 |
|
{ |
| 3238 |
|
Tcl_Namespace *namespacePtr; |
| 3239 |
|
Tcl_CallFrame frame; |
| 3240 |
|
int i, result; |
| 3241 |
|
|
| 3242 |
|
if (objc < 4) { |
| 3243 |
|
Tcl_WrongNumArgs(interp, 2, objv, "name arg ?arg...?"); |
| 3244 |
|
return TCL_ERROR; |
| 3245 |
|
} |
| 3246 |
|
|
| 3247 |
|
/* |
| 3248 |
|
* Resolve the namespace reference. |
| 3249 |
|
*/ |
| 3250 |
|
|
| 3251 |
|
result = GetNamespaceFromObj(interp, objv[2], &namespacePtr); |
| 3252 |
|
if (result != TCL_OK) { |
| 3253 |
|
return result; |
| 3254 |
|
} |
| 3255 |
|
if (namespacePtr == NULL) { |
| 3256 |
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
| 3257 |
|
"unknown namespace \"", Tcl_GetString(objv[2]), |
| 3258 |
|
"\" in inscope namespace command", (char *) NULL); |
| 3259 |
|
return TCL_ERROR; |
| 3260 |
|
} |
| 3261 |
|
|
| 3262 |
|
/* |
| 3263 |
|
* Make the specified namespace the current namespace. |
| 3264 |
|
*/ |
| 3265 |
|
|
| 3266 |
|
result = Tcl_PushCallFrame(interp, &frame, namespacePtr, |
| 3267 |
|
/*isProcCallFrame*/ 0); |
| 3268 |
|
if (result != TCL_OK) { |
| 3269 |
|
return result; |
| 3270 |
|
} |
| 3271 |
|
|
| 3272 |
|
/* |
| 3273 |
|
* Execute the command. If there is just one argument, just treat it as |
| 3274 |
|
* a script and evaluate it. Otherwise, create a list from the arguments |
| 3275 |
|
* after the first one, then concatenate the first argument and the list |
| 3276 |
|
* of extra arguments to form the command to evaluate. |
| 3277 |
|
*/ |
| 3278 |
|
|
| 3279 |
|
if (objc == 4) { |
| 3280 |
|
result = Tcl_EvalObjEx(interp, objv[3], 0); |
| 3281 |
|
} else { |
| 3282 |
|
Tcl_Obj *concatObjv[2]; |
| 3283 |
|
register Tcl_Obj *listPtr, *cmdObjPtr; |
| 3284 |
|
|
| 3285 |
|
listPtr = Tcl_NewListObj(0, (Tcl_Obj **) NULL); |
| 3286 |
|
for (i = 4; i < objc; i++) { |
| 3287 |
|
result = Tcl_ListObjAppendElement(interp, listPtr, objv[i]); |
| 3288 |
|
if (result != TCL_OK) { |
| 3289 |
|
Tcl_DecrRefCount(listPtr); /* free unneeded obj */ |
| 3290 |
|
return result; |
| 3291 |
|
} |
| 3292 |
|
} |
| 3293 |
|
|
| 3294 |
|
concatObjv[0] = objv[3]; |
| 3295 |
|
concatObjv[1] = listPtr; |
| 3296 |
|
cmdObjPtr = Tcl_ConcatObj(2, concatObjv); |
| 3297 |
|
result = Tcl_EvalObjEx(interp, cmdObjPtr, TCL_EVAL_DIRECT); |
| 3298 |
|
Tcl_DecrRefCount(listPtr); /* we're done with the list object */ |
| 3299 |
|
} |
| 3300 |
|
if (result == TCL_ERROR) { |
| 3301 |
|
char msg[256 + TCL_INTEGER_SPACE]; |
| 3302 |
|
|
| 3303 |
|
sprintf(msg, |
| 3304 |
|
"\n (in namespace inscope \"%.200s\" script line %d)", |
| 3305 |
|
namespacePtr->fullName, interp->errorLine); |
| 3306 |
|
Tcl_AddObjErrorInfo(interp, msg, -1); |
| 3307 |
|
} |
| 3308 |
|
|
| 3309 |
|
/* |
| 3310 |
|
* Restore the previous "current" namespace. |
| 3311 |
|
*/ |
| 3312 |
|
|
| 3313 |
|
Tcl_PopCallFrame(interp); |
| 3314 |
|
return result; |
| 3315 |
|
} |
| 3316 |
|
|
| 3317 |
|
/* |
| 3318 |
|
*---------------------------------------------------------------------- |
| 3319 |
|
* |
| 3320 |
|
* NamespaceOriginCmd -- |
| 3321 |
|
* |
| 3322 |
|
* Invoked to implement the "namespace origin" command to return the |
| 3323 |
|
* fully-qualified name of the "real" command to which the specified |
| 3324 |
|
* "imported command" refers. Handles the following syntax: |
| 3325 |
|
* |
| 3326 |
|
* namespace origin name |
| 3327 |
|
* |
| 3328 |
|
* Results: |
| 3329 |
|
* An imported command is created in an namespace when that namespace |
| 3330 |
|
* imports a command from another namespace. If a command is imported |
| 3331 |
|
* into a sequence of namespaces a, b,...,n where each successive |
| 3332 |
|
* namespace just imports the command from the previous namespace, this |
| 3333 |
|
* command returns the fully-qualified name of the original command in |
| 3334 |
|
* the first namespace, a. If "name" does not refer to an alias, its |
| 3335 |
|
* fully-qualified name is returned. The returned name is stored in the |
| 3336 |
|
* interpreter's result object. This procedure returns TCL_OK if |
| 3337 |
|
* successful, and TCL_ERROR if anything goes wrong. |
| 3338 |
|
* |
| 3339 |
|
* Side effects: |
| 3340 |
|
* If anything goes wrong, this procedure returns an error message in |
| 3341 |
|
* the interpreter's result object. |
| 3342 |
|
* |
| 3343 |
|
*---------------------------------------------------------------------- |
| 3344 |
|
*/ |
| 3345 |
|
|
| 3346 |
|
static int |
| 3347 |
|
NamespaceOriginCmd(dummy, interp, objc, objv) |
| 3348 |
|
ClientData dummy; /* Not used. */ |
| 3349 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 3350 |
|
int objc; /* Number of arguments. */ |
| 3351 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 3352 |
|
{ |
| 3353 |
|
Tcl_Command command, origCommand; |
| 3354 |
|
|
| 3355 |
|
if (objc != 3) { |
| 3356 |
|
Tcl_WrongNumArgs(interp, 2, objv, "name"); |
| 3357 |
|
return TCL_ERROR; |
| 3358 |
|
} |
| 3359 |
|
|
| 3360 |
|
command = Tcl_GetCommandFromObj(interp, objv[2]); |
| 3361 |
|
if (command == (Tcl_Command) NULL) { |
| 3362 |
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
| 3363 |
|
"invalid command name \"", Tcl_GetString(objv[2]), |
| 3364 |
|
"\"", (char *) NULL); |
| 3365 |
|
return TCL_ERROR; |
| 3366 |
|
} |
| 3367 |
|
origCommand = TclGetOriginalCommand(command); |
| 3368 |
|
if (origCommand == (Tcl_Command) NULL) { |
| 3369 |
|
/* |
| 3370 |
|
* The specified command isn't an imported command. Return the |
| 3371 |
|
* command's name qualified by the full name of the namespace it |
| 3372 |
|
* was defined in. |
| 3373 |
|
*/ |
| 3374 |
|
|
| 3375 |
|
Tcl_GetCommandFullName(interp, command, Tcl_GetObjResult(interp)); |
| 3376 |
|
} else { |
| 3377 |
|
Tcl_GetCommandFullName(interp, origCommand, Tcl_GetObjResult(interp)); |
| 3378 |
|
} |
| 3379 |
|
return TCL_OK; |
| 3380 |
|
} |
| 3381 |
|
|
| 3382 |
|
/* |
| 3383 |
|
*---------------------------------------------------------------------- |
| 3384 |
|
* |
| 3385 |
|
* NamespaceParentCmd -- |
| 3386 |
|
* |
| 3387 |
|
* Invoked to implement the "namespace parent" command that returns the |
| 3388 |
|
* fully-qualified name of the parent namespace for a specified |
| 3389 |
|
* namespace. Handles the following syntax: |
| 3390 |
|
* |
| 3391 |
|
* namespace parent ?name? |
| 3392 |
|
* |
| 3393 |
|
* Results: |
| 3394 |
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
| 3395 |
|
* |
| 3396 |
|
* Side effects: |
| 3397 |
|
* Returns a result in the interpreter's result object. If anything |
| 3398 |
|
* goes wrong, the result is an error message. |
| 3399 |
|
* |
| 3400 |
|
*---------------------------------------------------------------------- |
| 3401 |
|
*/ |
| 3402 |
|
|
| 3403 |
|
static int |
| 3404 |
|
NamespaceParentCmd(dummy, interp, objc, objv) |
| 3405 |
|
ClientData dummy; /* Not used. */ |
| 3406 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 3407 |
|
int objc; /* Number of arguments. */ |
| 3408 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 3409 |
|
{ |
| 3410 |
|
Tcl_Namespace *nsPtr; |
| 3411 |
|
int result; |
| 3412 |
|
|
| 3413 |
|
if (objc == 2) { |
| 3414 |
|
nsPtr = Tcl_GetCurrentNamespace(interp); |
| 3415 |
|
} else if (objc == 3) { |
| 3416 |
|
result = GetNamespaceFromObj(interp, objv[2], &nsPtr); |
| 3417 |
|
if (result != TCL_OK) { |
| 3418 |
|
return result; |
| 3419 |
|
} |
| 3420 |
|
if (nsPtr == NULL) { |
| 3421 |
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
| 3422 |
|
"unknown namespace \"", Tcl_GetString(objv[2]), |
| 3423 |
|
"\" in namespace parent command", (char *) NULL); |
| 3424 |
|
return TCL_ERROR; |
| 3425 |
|
} |
| 3426 |
|
} else { |
| 3427 |
|
Tcl_WrongNumArgs(interp, 2, objv, "?name?"); |
| 3428 |
|
return TCL_ERROR; |
| 3429 |
|
} |
| 3430 |
|
|
| 3431 |
|
/* |
| 3432 |
|
* Report the parent of the specified namespace. |
| 3433 |
|
*/ |
| 3434 |
|
|
| 3435 |
|
if (nsPtr->parentPtr != NULL) { |
| 3436 |
|
Tcl_SetStringObj(Tcl_GetObjResult(interp), |
| 3437 |
|
nsPtr->parentPtr->fullName, -1); |
| 3438 |
|
} |
| 3439 |
|
return TCL_OK; |
| 3440 |
|
} |
| 3441 |
|
|
| 3442 |
|
/* |
| 3443 |
|
*---------------------------------------------------------------------- |
| 3444 |
|
* |
| 3445 |
|
* NamespaceQualifiersCmd -- |
| 3446 |
|
* |
| 3447 |
|
* Invoked to implement the "namespace qualifiers" command that returns |
| 3448 |
|
* any leading namespace qualifiers in a string. These qualifiers are |
| 3449 |
|
* namespace names separated by "::"s. For example, for "::foo::p" this |
| 3450 |
|
* command returns "::foo", and for "::" it returns "". This command |
| 3451 |
|
* is the complement of the "namespace tail" command. Note that this |
| 3452 |
|
* command does not check whether the "namespace" names are, in fact, |
| 3453 |
|
* the names of currently defined namespaces. Handles the following |
| 3454 |
|
* syntax: |
| 3455 |
|
* |
| 3456 |
|
* namespace qualifiers string |
| 3457 |
|
* |
| 3458 |
|
* Results: |
| 3459 |
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
| 3460 |
|
* |
| 3461 |
|
* Side effects: |
| 3462 |
|
* Returns a result in the interpreter's result object. If anything |
| 3463 |
|
* goes wrong, the result is an error message. |
| 3464 |
|
* |
| 3465 |
|
*---------------------------------------------------------------------- |
| 3466 |
|
*/ |
| 3467 |
|
|
| 3468 |
|
static int |
| 3469 |
|
NamespaceQualifiersCmd(dummy, interp, objc, objv) |
| 3470 |
|
ClientData dummy; /* Not used. */ |
| 3471 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 3472 |
|
int objc; /* Number of arguments. */ |
| 3473 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 3474 |
|
{ |
| 3475 |
|
register char *name, *p; |
| 3476 |
|
int length; |
| 3477 |
|
|
| 3478 |
|
if (objc != 3) { |
| 3479 |
|
Tcl_WrongNumArgs(interp, 2, objv, "string"); |
| 3480 |
|
return TCL_ERROR; |
| 3481 |
|
} |
| 3482 |
|
|
| 3483 |
|
/* |
| 3484 |
|
* Find the end of the string, then work backward and find |
| 3485 |
|
* the start of the last "::" qualifier. |
| 3486 |
|
*/ |
| 3487 |
|
|
| 3488 |
|
name = Tcl_GetString(objv[2]); |
| 3489 |
|
for (p = name; *p != '\0'; p++) { |
| 3490 |
|
/* empty body */ |
| 3491 |
|
} |
| 3492 |
|
while (--p >= name) { |
| 3493 |
|
if ((*p == ':') && (p > name) && (*(p-1) == ':')) { |
| 3494 |
|
p -= 2; /* back up over the :: */ |
| 3495 |
|
while ((p >= name) && (*p == ':')) { |
| 3496 |
|
p--; /* back up over the preceeding : */ |
| 3497 |
|
} |
| 3498 |
|
break; |
| 3499 |
|
} |
| 3500 |
|
} |
| 3501 |
|
|
| 3502 |
|
if (p >= name) { |
| 3503 |
|
length = p-name+1; |
| 3504 |
|
Tcl_AppendToObj(Tcl_GetObjResult(interp), name, length); |
| 3505 |
|
} |
| 3506 |
|
return TCL_OK; |
| 3507 |
|
} |
| 3508 |
|
|
| 3509 |
|
/* |
| 3510 |
|
*---------------------------------------------------------------------- |
| 3511 |
|
* |
| 3512 |
|
* NamespaceTailCmd -- |
| 3513 |
|
* |
| 3514 |
|
* Invoked to implement the "namespace tail" command that returns the |
| 3515 |
|
* trailing name at the end of a string with "::" namespace |
| 3516 |
|
* qualifiers. These qualifiers are namespace names separated by |
| 3517 |
|
* "::"s. For example, for "::foo::p" this command returns "p", and for |
| 3518 |
|
* "::" it returns "". This command is the complement of the "namespace |
| 3519 |
|
* qualifiers" command. Note that this command does not check whether |
| 3520 |
|
* the "namespace" names are, in fact, the names of currently defined |
| 3521 |
|
* namespaces. Handles the following syntax: |
| 3522 |
|
* |
| 3523 |
|
* namespace tail string |
| 3524 |
|
* |
| 3525 |
|
* Results: |
| 3526 |
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
| 3527 |
|
* |
| 3528 |
|
* Side effects: |
| 3529 |
|
* Returns a result in the interpreter's result object. If anything |
| 3530 |
|
* goes wrong, the result is an error message. |
| 3531 |
|
* |
| 3532 |
|
*---------------------------------------------------------------------- |
| 3533 |
|
*/ |
| 3534 |
|
|
| 3535 |
|
static int |
| 3536 |
|
NamespaceTailCmd(dummy, interp, objc, objv) |
| 3537 |
|
ClientData dummy; /* Not used. */ |
| 3538 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 3539 |
|
int objc; /* Number of arguments. */ |
| 3540 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 3541 |
|
{ |
| 3542 |
|
register char *name, *p; |
| 3543 |
|
|
| 3544 |
|
if (objc != 3) { |
| 3545 |
|
Tcl_WrongNumArgs(interp, 2, objv, "string"); |
| 3546 |
|
return TCL_ERROR; |
| 3547 |
|
} |
| 3548 |
|
|
| 3549 |
|
/* |
| 3550 |
|
* Find the end of the string, then work backward and find the |
| 3551 |
|
* last "::" qualifier. |
| 3552 |
|
*/ |
| 3553 |
|
|
| 3554 |
|
name = Tcl_GetString(objv[2]); |
| 3555 |
|
for (p = name; *p != '\0'; p++) { |
| 3556 |
|
/* empty body */ |
| 3557 |
|
} |
| 3558 |
|
while (--p > name) { |
| 3559 |
|
if ((*p == ':') && (*(p-1) == ':')) { |
| 3560 |
|
p++; /* just after the last "::" */ |
| 3561 |
|
break; |
| 3562 |
|
} |
| 3563 |
|
} |
| 3564 |
|
|
| 3565 |
|
if (p >= name) { |
| 3566 |
|
Tcl_AppendToObj(Tcl_GetObjResult(interp), p, -1); |
| 3567 |
|
} |
| 3568 |
|
return TCL_OK; |
| 3569 |
|
} |
| 3570 |
|
|
| 3571 |
|
/* |
| 3572 |
|
*---------------------------------------------------------------------- |
| 3573 |
|
* |
| 3574 |
|
* NamespaceWhichCmd -- |
| 3575 |
|
* |
| 3576 |
|
* Invoked to implement the "namespace which" command that returns the |
| 3577 |
|
* fully-qualified name of a command or variable. If the specified |
| 3578 |
|
* command or variable does not exist, it returns "". Handles the |
| 3579 |
|
* following syntax: |
| 3580 |
|
* |
| 3581 |
|
* namespace which ?-command? ?-variable? name |
| 3582 |
|
* |
| 3583 |
|
* Results: |
| 3584 |
|
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. |
| 3585 |
|
* |
| 3586 |
|
* Side effects: |
| 3587 |
|
* Returns a result in the interpreter's result object. If anything |
| 3588 |
|
* goes wrong, the result is an error message. |
| 3589 |
|
* |
| 3590 |
|
*---------------------------------------------------------------------- |
| 3591 |
|
*/ |
| 3592 |
|
|
| 3593 |
|
static int |
| 3594 |
|
NamespaceWhichCmd(dummy, interp, objc, objv) |
| 3595 |
|
ClientData dummy; /* Not used. */ |
| 3596 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 3597 |
|
int objc; /* Number of arguments. */ |
| 3598 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 3599 |
|
{ |
| 3600 |
|
register char *arg; |
| 3601 |
|
Tcl_Command cmd; |
| 3602 |
|
Tcl_Var variable; |
| 3603 |
|
int argIndex, lookup; |
| 3604 |
|
|
| 3605 |
|
if (objc < 3) { |
| 3606 |
|
badArgs: |
| 3607 |
|
Tcl_WrongNumArgs(interp, 2, objv, |
| 3608 |
|
"?-command? ?-variable? name"); |
| 3609 |
|
return TCL_ERROR; |
| 3610 |
|
} |
| 3611 |
|
|
| 3612 |
|
/* |
| 3613 |
|
* Look for a flag controlling the lookup. |
| 3614 |
|
*/ |
| 3615 |
|
|
| 3616 |
|
argIndex = 2; |
| 3617 |
|
lookup = 0; /* assume command lookup by default */ |
| 3618 |
|
arg = Tcl_GetString(objv[2]); |
| 3619 |
|
if (*arg == '-') { |
| 3620 |
|
if (strncmp(arg, "-command", 8) == 0) { |
| 3621 |
|
lookup = 0; |
| 3622 |
|
} else if (strncmp(arg, "-variable", 9) == 0) { |
| 3623 |
|
lookup = 1; |
| 3624 |
|
} else { |
| 3625 |
|
goto badArgs; |
| 3626 |
|
} |
| 3627 |
|
argIndex = 3; |
| 3628 |
|
} |
| 3629 |
|
if (objc != (argIndex + 1)) { |
| 3630 |
|
goto badArgs; |
| 3631 |
|
} |
| 3632 |
|
|
| 3633 |
|
switch (lookup) { |
| 3634 |
|
case 0: /* -command */ |
| 3635 |
|
cmd = Tcl_GetCommandFromObj(interp, objv[argIndex]); |
| 3636 |
|
if (cmd == (Tcl_Command) NULL) { |
| 3637 |
|
return TCL_OK; /* cmd not found, just return (no error) */ |
| 3638 |
|
} |
| 3639 |
|
Tcl_GetCommandFullName(interp, cmd, Tcl_GetObjResult(interp)); |
| 3640 |
|
break; |
| 3641 |
|
|
| 3642 |
|
case 1: /* -variable */ |
| 3643 |
|
arg = Tcl_GetString(objv[argIndex]); |
| 3644 |
|
variable = Tcl_FindNamespaceVar(interp, arg, (Tcl_Namespace *) NULL, |
| 3645 |
|
/*flags*/ 0); |
| 3646 |
|
if (variable != (Tcl_Var) NULL) { |
| 3647 |
|
Tcl_GetVariableFullName(interp, variable, Tcl_GetObjResult(interp)); |
| 3648 |
|
} |
| 3649 |
|
break; |
| 3650 |
|
} |
| 3651 |
|
return TCL_OK; |
| 3652 |
|
} |
| 3653 |
|
|
| 3654 |
|
/* |
| 3655 |
|
*---------------------------------------------------------------------- |
| 3656 |
|
* |
| 3657 |
|
* FreeNsNameInternalRep -- |
| 3658 |
|
* |
| 3659 |
|
* Frees the resources associated with a nsName object's internal |
| 3660 |
|
* representation. |
| 3661 |
|
* |
| 3662 |
|
* Results: |
| 3663 |
|
* None. |
| 3664 |
|
* |
| 3665 |
|
* Side effects: |
| 3666 |
|
* Decrements the ref count of any Namespace structure pointed |
| 3667 |
|
* to by the nsName's internal representation. If there are no more |
| 3668 |
|
* references to the namespace, it's structure will be freed. |
| 3669 |
|
* |
| 3670 |
|
*---------------------------------------------------------------------- |
| 3671 |
|
*/ |
| 3672 |
|
|
| 3673 |
|
static void |
| 3674 |
|
FreeNsNameInternalRep(objPtr) |
| 3675 |
|
register Tcl_Obj *objPtr; /* nsName object with internal |
| 3676 |
|
* representation to free */ |
| 3677 |
|
{ |
| 3678 |
|
register ResolvedNsName *resNamePtr = |
| 3679 |
|
(ResolvedNsName *) objPtr->internalRep.otherValuePtr; |
| 3680 |
|
Namespace *nsPtr; |
| 3681 |
|
|
| 3682 |
|
/* |
| 3683 |
|
* Decrement the reference count of the namespace. If there are no |
| 3684 |
|
* more references, free it up. |
| 3685 |
|
*/ |
| 3686 |
|
|
| 3687 |
|
if (resNamePtr != NULL) { |
| 3688 |
|
resNamePtr->refCount--; |
| 3689 |
|
if (resNamePtr->refCount == 0) { |
| 3690 |
|
|
| 3691 |
|
/* |
| 3692 |
|
* Decrement the reference count for the cached namespace. If |
| 3693 |
|
* the namespace is dead, and there are no more references to |
| 3694 |
|
* it, free it. |
| 3695 |
|
*/ |
| 3696 |
|
|
| 3697 |
|
nsPtr = resNamePtr->nsPtr; |
| 3698 |
|
nsPtr->refCount--; |
| 3699 |
|
if ((nsPtr->refCount == 0) && (nsPtr->flags & NS_DEAD)) { |
| 3700 |
|
NamespaceFree(nsPtr); |
| 3701 |
|
} |
| 3702 |
|
ckfree((char *) resNamePtr); |
| 3703 |
|
} |
| 3704 |
|
} |
| 3705 |
|
} |
| 3706 |
|
|
| 3707 |
|
/* |
| 3708 |
|
*---------------------------------------------------------------------- |
| 3709 |
|
* |
| 3710 |
|
* DupNsNameInternalRep -- |
| 3711 |
|
* |
| 3712 |
|
* Initializes the internal representation of a nsName object to a copy |
| 3713 |
|
* of the internal representation of another nsName object. |
| 3714 |
|
* |
| 3715 |
|
* Results: |
| 3716 |
|
* None. |
| 3717 |
|
* |
| 3718 |
|
* Side effects: |
| 3719 |
|
* copyPtr's internal rep is set to refer to the same namespace |
| 3720 |
|
* referenced by srcPtr's internal rep. Increments the ref count of |
| 3721 |
|
* the ResolvedNsName structure used to hold the namespace reference. |
| 3722 |
|
* |
| 3723 |
|
*---------------------------------------------------------------------- |
| 3724 |
|
*/ |
| 3725 |
|
|
| 3726 |
|
static void |
| 3727 |
|
DupNsNameInternalRep(srcPtr, copyPtr) |
| 3728 |
|
Tcl_Obj *srcPtr; /* Object with internal rep to copy. */ |
| 3729 |
|
register Tcl_Obj *copyPtr; /* Object with internal rep to set. */ |
| 3730 |
|
{ |
| 3731 |
|
register ResolvedNsName *resNamePtr = |
| 3732 |
|
(ResolvedNsName *) srcPtr->internalRep.otherValuePtr; |
| 3733 |
|
|
| 3734 |
|
copyPtr->internalRep.otherValuePtr = (VOID *) resNamePtr; |
| 3735 |
|
if (resNamePtr != NULL) { |
| 3736 |
|
resNamePtr->refCount++; |
| 3737 |
|
} |
| 3738 |
|
copyPtr->typePtr = &tclNsNameType; |
| 3739 |
|
} |
| 3740 |
|
|
| 3741 |
|
/* |
| 3742 |
|
*---------------------------------------------------------------------- |
| 3743 |
|
* |
| 3744 |
|
* SetNsNameFromAny -- |
| 3745 |
|
* |
| 3746 |
|
* Attempt to generate a nsName internal representation for a |
| 3747 |
|
* Tcl object. |
| 3748 |
|
* |
| 3749 |
|
* Results: |
| 3750 |
|
* Returns TCL_OK if the value could be converted to a proper |
| 3751 |
|
* namespace reference. Otherwise, it returns TCL_ERROR, along |
| 3752 |
|
* with an error message in the interpreter's result object. |
| 3753 |
|
* |
| 3754 |
|
* Side effects: |
| 3755 |
|
* If successful, the object is made a nsName object. Its internal rep |
| 3756 |
|
* is set to point to a ResolvedNsName, which contains a cached pointer |
| 3757 |
|
* to the Namespace. Reference counts are kept on both the |
| 3758 |
|
* ResolvedNsName and the Namespace, so we can keep track of their |
| 3759 |
|
* usage and free them when appropriate. |
| 3760 |
|
* |
| 3761 |
|
*---------------------------------------------------------------------- |
| 3762 |
|
*/ |
| 3763 |
|
|
| 3764 |
|
static int |
| 3765 |
|
SetNsNameFromAny(interp, objPtr) |
| 3766 |
|
Tcl_Interp *interp; /* Points to the namespace in which to |
| 3767 |
|
* resolve name. Also used for error |
| 3768 |
|
* reporting if not NULL. */ |
| 3769 |
|
register Tcl_Obj *objPtr; /* The object to convert. */ |
| 3770 |
|
{ |
| 3771 |
|
register Tcl_ObjType *oldTypePtr = objPtr->typePtr; |
| 3772 |
|
char *name, *dummy; |
| 3773 |
|
Namespace *nsPtr, *dummy1Ptr, *dummy2Ptr; |
| 3774 |
|
register ResolvedNsName *resNamePtr; |
| 3775 |
|
|
| 3776 |
|
/* |
| 3777 |
|
* Get the string representation. Make it up-to-date if necessary. |
| 3778 |
|
*/ |
| 3779 |
|
|
| 3780 |
|
name = objPtr->bytes; |
| 3781 |
|
if (name == NULL) { |
| 3782 |
|
name = Tcl_GetString(objPtr); |
| 3783 |
|
} |
| 3784 |
|
|
| 3785 |
|
/* |
| 3786 |
|
* Look for the namespace "name" in the current namespace. If there is |
| 3787 |
|
* an error parsing the (possibly qualified) name, return an error. |
| 3788 |
|
* If the namespace isn't found, we convert the object to an nsName |
| 3789 |
|
* object with a NULL ResolvedNsName* internal rep. |
| 3790 |
|
*/ |
| 3791 |
|
|
| 3792 |
|
TclGetNamespaceForQualName(interp, name, (Namespace *) NULL, |
| 3793 |
|
FIND_ONLY_NS, &nsPtr, &dummy1Ptr, &dummy2Ptr, &dummy); |
| 3794 |
|
|
| 3795 |
|
/* |
| 3796 |
|
* If we found a namespace, then create a new ResolvedNsName structure |
| 3797 |
|
* that holds a reference to it. |
| 3798 |
|
*/ |
| 3799 |
|
|
| 3800 |
|
if (nsPtr != NULL) { |
| 3801 |
|
Namespace *currNsPtr = |
| 3802 |
|
(Namespace *) Tcl_GetCurrentNamespace(interp); |
| 3803 |
|
|
| 3804 |
|
nsPtr->refCount++; |
| 3805 |
|
resNamePtr = (ResolvedNsName *) ckalloc(sizeof(ResolvedNsName)); |
| 3806 |
|
resNamePtr->nsPtr = nsPtr; |
| 3807 |
|
resNamePtr->nsId = nsPtr->nsId; |
| 3808 |
|
resNamePtr->refNsPtr = currNsPtr; |
| 3809 |
|
resNamePtr->refCount = 1; |
| 3810 |
|
} else { |
| 3811 |
|
resNamePtr = NULL; |
| 3812 |
|
} |
| 3813 |
|
|
| 3814 |
|
/* |
| 3815 |
|
* Free the old internalRep before setting the new one. |
| 3816 |
|
* We do this as late as possible to allow the conversion code |
| 3817 |
|
* (in particular, Tcl_GetStringFromObj) to use that old internalRep. |
| 3818 |
|
*/ |
| 3819 |
|
|
| 3820 |
|
if ((oldTypePtr != NULL) && (oldTypePtr->freeIntRepProc != NULL)) { |
| 3821 |
|
oldTypePtr->freeIntRepProc(objPtr); |
| 3822 |
|
} |
| 3823 |
|
|
| 3824 |
|
objPtr->internalRep.otherValuePtr = (VOID *) resNamePtr; |
| 3825 |
|
objPtr->typePtr = &tclNsNameType; |
| 3826 |
|
return TCL_OK; |
| 3827 |
|
} |
| 3828 |
|
|
| 3829 |
|
/* |
| 3830 |
|
*---------------------------------------------------------------------- |
| 3831 |
|
* |
| 3832 |
|
* UpdateStringOfNsName -- |
| 3833 |
|
* |
| 3834 |
|
* Updates the string representation for a nsName object. |
| 3835 |
|
* Note: This procedure does not free an existing old string rep |
| 3836 |
|
* so storage will be lost if this has not already been done. |
| 3837 |
|
* |
| 3838 |
|
* Results: |
| 3839 |
|
* None. |
| 3840 |
|
* |
| 3841 |
|
* Side effects: |
| 3842 |
|
* The object's string is set to a copy of the fully qualified |
| 3843 |
|
* namespace name. |
| 3844 |
|
* |
| 3845 |
|
*---------------------------------------------------------------------- |
| 3846 |
|
*/ |
| 3847 |
|
|
| 3848 |
|
static void |
| 3849 |
|
UpdateStringOfNsName(objPtr) |
| 3850 |
|
register Tcl_Obj *objPtr; /* nsName object with string rep to update. */ |
| 3851 |
|
{ |
| 3852 |
|
ResolvedNsName *resNamePtr = |
| 3853 |
|
(ResolvedNsName *) objPtr->internalRep.otherValuePtr; |
| 3854 |
|
register Namespace *nsPtr; |
| 3855 |
|
char *name = ""; |
| 3856 |
|
int length; |
| 3857 |
|
|
| 3858 |
|
if ((resNamePtr != NULL) |
| 3859 |
|
&& (resNamePtr->nsId == resNamePtr->nsPtr->nsId)) { |
| 3860 |
|
nsPtr = resNamePtr->nsPtr; |
| 3861 |
|
if (nsPtr->flags & NS_DEAD) { |
| 3862 |
|
nsPtr = NULL; |
| 3863 |
|
} |
| 3864 |
|
if (nsPtr != NULL) { |
| 3865 |
|
name = nsPtr->fullName; |
| 3866 |
|
} |
| 3867 |
|
} |
| 3868 |
|
|
| 3869 |
|
/* |
| 3870 |
|
* The following sets the string rep to an empty string on the heap |
| 3871 |
|
* if the internal rep is NULL. |
| 3872 |
|
*/ |
| 3873 |
|
|
| 3874 |
|
length = strlen(name); |
| 3875 |
|
if (length == 0) { |
| 3876 |
|
objPtr->bytes = tclEmptyStringRep; |
| 3877 |
|
} else { |
| 3878 |
|
objPtr->bytes = (char *) ckalloc((unsigned) (length + 1)); |
| 3879 |
|
memcpy((VOID *) objPtr->bytes, (VOID *) name, (unsigned) length); |
| 3880 |
|
objPtr->bytes[length] = '\0'; |
| 3881 |
|
} |
| 3882 |
|
objPtr->length = length; |
| 3883 |
|
} |
| 3884 |
|
|
| 3885 |
|
/* End of tclnamesp.c */ |
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