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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tcl_base/tclregexp.c,v 1.1.1.1 2001/06/13 04:45:39 dtashley Exp $ */ |
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/* |
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* tclRegexp.c -- |
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* |
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* This file contains the public interfaces to the Tcl regular |
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* expression mechanism. |
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* |
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* Copyright (c) 1998 by Sun Microsystems, Inc. |
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* Copyright (c) 1998-1999 by Scriptics Corporation. |
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* |
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* See the file "license.terms" for information on usage and redistribution |
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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* |
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* RCS: @(#) $Id: tclregexp.c,v 1.1.1.1 2001/06/13 04:45:39 dtashley Exp $ |
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*/ |
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#include "tclInt.h" |
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#include "tclPort.h" |
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#include "tclRegexp.h" |
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/* |
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*---------------------------------------------------------------------- |
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* The routines in this file use Henry Spencer's regular expression |
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* package contained in the following additional source files: |
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* |
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* regc_color.c regc_cvec.c regc_lex.c |
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* regc_nfa.c regcomp.c regcustom.h |
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* rege_dfa.c regerror.c regerrs.h |
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* regex.h regexec.c regfree.c |
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* regfronts.c regguts.h |
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* |
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* Copyright (c) 1998 Henry Spencer. All rights reserved. |
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* |
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* Development of this software was funded, in part, by Cray Research Inc., |
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* UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics |
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* Corporation, none of whom are responsible for the results. The author |
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* thanks all of them. |
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* |
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* Redistribution and use in source and binary forms -- with or without |
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* modification -- are permitted for any purpose, provided that |
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* redistributions in source form retain this entire copyright notice and |
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* indicate the origin and nature of any modifications. |
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* |
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* I'd appreciate being given credit for this package in the documentation |
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* of software which uses it, but that is not a requirement. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY |
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL |
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* HENRY SPENCER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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* *** NOTE: this code has been altered slightly for use in Tcl: *** |
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* *** 1. Names have been changed, e.g. from re_comp to *** |
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* *** TclRegComp, to avoid clashes with other *** |
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* *** regexp implementations used by applications. *** |
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*/ |
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/* |
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* Thread local storage used to maintain a per-thread cache of compiled |
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* regular expressions. |
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*/ |
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#define NUM_REGEXPS 30 |
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typedef struct ThreadSpecificData { |
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int initialized; /* Set to 1 when the module is initialized. */ |
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char *patterns[NUM_REGEXPS];/* Strings corresponding to compiled |
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* regular expression patterns. NULL |
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* means that this slot isn't used. |
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* Malloc-ed. */ |
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int patLengths[NUM_REGEXPS];/* Number of non-null characters in |
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* corresponding entry in patterns. |
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* -1 means entry isn't used. */ |
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struct TclRegexp *regexps[NUM_REGEXPS]; |
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/* Compiled forms of above strings. Also |
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* malloc-ed, or NULL if not in use yet. */ |
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} ThreadSpecificData; |
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static Tcl_ThreadDataKey dataKey; |
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/* |
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* Declarations for functions used only in this file. |
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*/ |
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static TclRegexp * CompileRegexp _ANSI_ARGS_((Tcl_Interp *interp, |
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char *pattern, int length, int flags)); |
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static void DupRegexpInternalRep _ANSI_ARGS_((Tcl_Obj *srcPtr, |
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Tcl_Obj *copyPtr)); |
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static void FinalizeRegexp _ANSI_ARGS_((ClientData clientData)); |
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static void FreeRegexp _ANSI_ARGS_((TclRegexp *regexpPtr)); |
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static void FreeRegexpInternalRep _ANSI_ARGS_((Tcl_Obj *objPtr)); |
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static int RegExpExecUniChar _ANSI_ARGS_((Tcl_Interp *interp, |
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Tcl_RegExp re, CONST Tcl_UniChar *uniString, |
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int numChars, int nmatches, int flags)); |
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static int SetRegexpFromAny _ANSI_ARGS_((Tcl_Interp *interp, |
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Tcl_Obj *objPtr)); |
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/* |
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* The regular expression Tcl object type. This serves as a cache |
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* of the compiled form of the regular expression. |
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*/ |
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Tcl_ObjType tclRegexpType = { |
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"regexp", /* name */ |
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FreeRegexpInternalRep, /* freeIntRepProc */ |
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DupRegexpInternalRep, /* dupIntRepProc */ |
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NULL, /* updateStringProc */ |
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SetRegexpFromAny /* setFromAnyProc */ |
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}; |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* Tcl_RegExpCompile -- |
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* |
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* Compile a regular expression into a form suitable for fast |
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* matching. This procedure is DEPRECATED in favor of the |
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* object version of the command. |
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* |
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* Results: |
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* The return value is a pointer to the compiled form of string, |
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* suitable for passing to Tcl_RegExpExec. This compiled form |
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* is only valid up until the next call to this procedure, so |
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* don't keep these around for a long time! If an error occurred |
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* while compiling the pattern, then NULL is returned and an error |
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* message is left in the interp's result. |
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* |
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* Side effects: |
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* Updates the cache of compiled regexps. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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Tcl_RegExp |
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Tcl_RegExpCompile(interp, string) |
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Tcl_Interp *interp; /* For use in error reporting and |
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* to access the interp regexp cache. */ |
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char *string; /* String for which to produce |
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* compiled regular expression. */ |
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{ |
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return (Tcl_RegExp) CompileRegexp(interp, string, (int) strlen(string), |
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REG_ADVANCED); |
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} |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* Tcl_RegExpExec -- |
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* |
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* Execute the regular expression matcher using a compiled form |
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* of a regular expression and save information about any match |
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* that is found. |
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* |
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* Results: |
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* If an error occurs during the matching operation then -1 |
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* is returned and the interp's result contains an error message. |
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* Otherwise the return value is 1 if a matching range is |
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* found and 0 if there is no matching range. |
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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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int |
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Tcl_RegExpExec(interp, re, string, start) |
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Tcl_Interp *interp; /* Interpreter to use for error reporting. */ |
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Tcl_RegExp re; /* Compiled regular expression; must have |
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* been returned by previous call to |
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* Tcl_GetRegExpFromObj. */ |
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CONST char *string; /* String against which to match re. */ |
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CONST char *start; /* If string is part of a larger string, |
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* this identifies beginning of larger |
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* string, so that "^" won't match. */ |
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{ |
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int flags, result, numChars; |
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TclRegexp *regexp = (TclRegexp *)re; |
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Tcl_DString ds; |
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Tcl_UniChar *ustr; |
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/* |
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* If the starting point is offset from the beginning of the buffer, |
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* then we need to tell the regexp engine not to match "^". |
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*/ |
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if (string > start) { |
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flags = REG_NOTBOL; |
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} else { |
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flags = 0; |
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} |
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/* |
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* Remember the string for use by Tcl_RegExpRange(). |
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*/ |
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regexp->string = string; |
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regexp->objPtr = NULL; |
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/* |
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* Convert the string to Unicode and perform the match. |
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*/ |
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Tcl_DStringInit(&ds); |
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ustr = Tcl_UtfToUniCharDString(string, -1, &ds); |
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numChars = Tcl_DStringLength(&ds) / sizeof(Tcl_UniChar); |
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result = RegExpExecUniChar(interp, re, ustr, numChars, |
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-1 /* nmatches */, flags); |
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Tcl_DStringFree(&ds); |
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return result; |
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} |
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/* |
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*--------------------------------------------------------------------------- |
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* |
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* Tcl_RegExpRange -- |
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* |
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* Returns pointers describing the range of a regular expression match, |
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* or one of the subranges within the match. |
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* |
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* Results: |
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* The variables at *startPtr and *endPtr are modified to hold the |
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* addresses of the endpoints of the range given by index. If the |
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* specified range doesn't exist then NULLs are returned. |
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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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void |
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Tcl_RegExpRange(re, index, startPtr, endPtr) |
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Tcl_RegExp re; /* Compiled regular expression that has |
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* been passed to Tcl_RegExpExec. */ |
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int index; /* 0 means give the range of the entire |
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* match, > 0 means give the range of |
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* a matching subrange. */ |
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char **startPtr; /* Store address of first character in |
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* (sub-) range here. */ |
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char **endPtr; /* Store address of character just after last |
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* in (sub-) range here. */ |
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{ |
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TclRegexp *regexpPtr = (TclRegexp *) re; |
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CONST char *string; |
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if ((size_t) index > regexpPtr->re.re_nsub) { |
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*startPtr = *endPtr = NULL; |
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} else if (regexpPtr->matches[index].rm_so < 0) { |
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*startPtr = *endPtr = NULL; |
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} else { |
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if (regexpPtr->objPtr) { |
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string = Tcl_GetString(regexpPtr->objPtr); |
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} else { |
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string = regexpPtr->string; |
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} |
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*startPtr = Tcl_UtfAtIndex(string, regexpPtr->matches[index].rm_so); |
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*endPtr = Tcl_UtfAtIndex(string, regexpPtr->matches[index].rm_eo); |
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} |
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} |
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/* |
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*--------------------------------------------------------------------------- |
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* |
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* RegExpExecUniChar -- |
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* |
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* Execute the regular expression matcher using a compiled form of a |
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* regular expression and save information about any match that is |
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* found. |
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* |
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* Results: |
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* If an error occurs during the matching operation then -1 is |
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* returned and an error message is left in interp's result. |
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* Otherwise the return value is 1 if a matching range was found or |
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* 0 if there was no matching range. |
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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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static int |
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RegExpExecUniChar(interp, re, wString, numChars, nmatches, flags) |
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Tcl_Interp *interp; /* Interpreter to use for error reporting. */ |
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Tcl_RegExp re; /* Compiled regular expression; returned by |
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* a previous call to Tcl_GetRegExpFromObj */ |
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CONST Tcl_UniChar *wString; /* String against which to match re. */ |
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int numChars; /* Length of Tcl_UniChar string (must |
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* be >= 0). */ |
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int nmatches; /* How many subexpression matches (counting |
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* the whole match as subexpression 0) are |
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* of interest. -1 means "don't know". */ |
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int flags; /* Regular expression flags. */ |
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{ |
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int status; |
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TclRegexp *regexpPtr = (TclRegexp *) re; |
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size_t last = regexpPtr->re.re_nsub + 1; |
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size_t nm = last; |
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if (nmatches >= 0 && (size_t) nmatches < nm) { |
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nm = (size_t) nmatches; |
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} |
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status = TclReExec(®expPtr->re, wString, (size_t) numChars, |
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®expPtr->details, nm, regexpPtr->matches, flags); |
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/* |
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* Check for errors. |
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*/ |
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if (status != REG_OKAY) { |
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if (status == REG_NOMATCH) { |
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return 0; |
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} |
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if (interp != NULL) { |
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TclRegError(interp, "error while matching regular expression: ", |
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status); |
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} |
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return -1; |
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} |
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return 1; |
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} |
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/* |
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*--------------------------------------------------------------------------- |
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* |
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* TclRegExpRangeUniChar -- |
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* |
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* Returns pointers describing the range of a regular expression match, |
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* or one of the subranges within the match, or the hypothetical range |
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* represented by the rm_extend field of the rm_detail_t. |
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* |
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* Results: |
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* The variables at *startPtr and *endPtr are modified to hold the |
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* offsets of the endpoints of the range given by index. If the |
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* specified range doesn't exist then -1s are supplied. |
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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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void |
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TclRegExpRangeUniChar(re, index, startPtr, endPtr) |
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Tcl_RegExp re; /* Compiled regular expression that has |
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* been passed to Tcl_RegExpExec. */ |
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int index; /* 0 means give the range of the entire |
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* match, > 0 means give the range of |
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* a matching subrange, -1 means the |
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* range of the rm_extend field. */ |
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int *startPtr; /* Store address of first character in |
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* (sub-) range here. */ |
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int *endPtr; /* Store address of character just after last |
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* in (sub-) range here. */ |
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{ |
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TclRegexp *regexpPtr = (TclRegexp *) re; |
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if ((regexpPtr->flags®_EXPECT) && index == -1) { |
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*startPtr = regexpPtr->details.rm_extend.rm_so; |
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*endPtr = regexpPtr->details.rm_extend.rm_eo; |
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} else if ((size_t) index > regexpPtr->re.re_nsub) { |
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*startPtr = -1; |
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*endPtr = -1; |
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} else { |
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*startPtr = regexpPtr->matches[index].rm_so; |
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*endPtr = regexpPtr->matches[index].rm_eo; |
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} |
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} |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* Tcl_RegExpMatch -- |
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* |
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* See if a string matches a regular expression. |
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* |
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* Results: |
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* If an error occurs during the matching operation then -1 |
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* is returned and the interp's result contains an error message. |
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* Otherwise the return value is 1 if "string" matches "pattern" |
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* and 0 otherwise. |
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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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int |
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Tcl_RegExpMatch(interp, string, pattern) |
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Tcl_Interp *interp; /* Used for error reporting. May be NULL. */ |
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char *string; /* String. */ |
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char *pattern; /* Regular expression to match against |
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* string. */ |
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{ |
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Tcl_RegExp re; |
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re = Tcl_RegExpCompile(interp, pattern); |
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if (re == NULL) { |
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return -1; |
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} |
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return Tcl_RegExpExec(interp, re, string, string); |
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} |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* Tcl_RegExpExecObj -- |
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* |
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* Execute a precompiled regexp against the given object. |
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* |
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* Results: |
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* If an error occurs during the matching operation then -1 |
|
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* is returned and the interp's result contains an error message. |
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* Otherwise the return value is 1 if "string" matches "pattern" |
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* and 0 otherwise. |
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* |
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* Side effects: |
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* Converts the object to a Unicode object. |
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* |
|
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*---------------------------------------------------------------------- |
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*/ |
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int |
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Tcl_RegExpExecObj(interp, re, objPtr, offset, nmatches, flags) |
|
|
Tcl_Interp *interp; /* Interpreter to use for error reporting. */ |
|
|
Tcl_RegExp re; /* Compiled regular expression; must have |
|
|
* been returned by previous call to |
|
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* Tcl_GetRegExpFromObj. */ |
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Tcl_Obj *objPtr; /* String against which to match re. */ |
|
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int offset; /* Character index that marks where matching |
|
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* should begin. */ |
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int nmatches; /* How many subexpression matches (counting |
|
|
* the whole match as subexpression 0) are |
|
|
* of interest. -1 means all of them. */ |
|
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int flags; /* Regular expression execution flags. */ |
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{ |
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TclRegexp *regexpPtr = (TclRegexp *) re; |
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Tcl_UniChar *udata; |
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int length; |
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/* |
|
|
* Save the target object so we can extract strings from it later. |
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*/ |
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regexpPtr->string = NULL; |
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regexpPtr->objPtr = objPtr; |
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udata = Tcl_GetUnicode(objPtr); |
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length = Tcl_GetCharLength(objPtr); |
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if (offset > length) { |
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offset = length; |
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} |
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udata += offset; |
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length -= offset; |
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return RegExpExecUniChar(interp, re, udata, length, nmatches, flags); |
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} |
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/* |
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*---------------------------------------------------------------------- |
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* |
|
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* Tcl_RegExpMatchObj -- |
|
|
* |
|
|
* See if an object matches a regular expression. |
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|
* |
|
|
* Results: |
|
|
* If an error occurs during the matching operation then -1 |
|
|
* is returned and the interp's result contains an error message. |
|
|
* Otherwise the return value is 1 if "string" matches "pattern" |
|
|
* and 0 otherwise. |
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|
* |
|
|
* Side effects: |
|
|
* Changes the internal rep of the pattern and string objects. |
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|
* |
|
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*---------------------------------------------------------------------- |
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|
*/ |
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|
|
|
|
int |
|
|
Tcl_RegExpMatchObj(interp, stringObj, patternObj) |
|
|
Tcl_Interp *interp; /* Used for error reporting. May be NULL. */ |
|
|
Tcl_Obj *stringObj; /* Object containing the String to search. */ |
|
|
Tcl_Obj *patternObj; /* Regular expression to match against |
|
|
* string. */ |
|
|
{ |
|
|
Tcl_RegExp re; |
|
|
|
|
|
re = Tcl_GetRegExpFromObj(interp, patternObj, |
|
|
TCL_REG_ADVANCED | TCL_REG_NOSUB); |
|
|
if (re == NULL) { |
|
|
return -1; |
|
|
} |
|
|
return Tcl_RegExpExecObj(interp, re, stringObj, 0 /* offset */, |
|
|
0 /* nmatches */, 0 /* flags */); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_RegExpGetInfo -- |
|
|
* |
|
|
* Retrieve information about the current match. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
Tcl_RegExpGetInfo(regexp, infoPtr) |
|
|
Tcl_RegExp regexp; /* Pattern from which to get subexpressions. */ |
|
|
Tcl_RegExpInfo *infoPtr; /* Match information is stored here. */ |
|
|
{ |
|
|
TclRegexp *regexpPtr = (TclRegexp *) regexp; |
|
|
|
|
|
infoPtr->nsubs = regexpPtr->re.re_nsub; |
|
|
infoPtr->matches = (Tcl_RegExpIndices *) regexpPtr->matches; |
|
|
infoPtr->extendStart = regexpPtr->details.rm_extend.rm_so; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tcl_GetRegExpFromObj -- |
|
|
* |
|
|
* Compile a regular expression into a form suitable for fast |
|
|
* matching. This procedure caches the result in a Tcl_Obj. |
|
|
* |
|
|
* Results: |
|
|
* The return value is a pointer to the compiled form of string, |
|
|
* suitable for passing to Tcl_RegExpExec. If an error occurred |
|
|
* while compiling the pattern, then NULL is returned and an error |
|
|
* message is left in the interp's result. |
|
|
* |
|
|
* Side effects: |
|
|
* Updates the native rep of the Tcl_Obj. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
Tcl_RegExp |
|
|
Tcl_GetRegExpFromObj(interp, objPtr, flags) |
|
|
Tcl_Interp *interp; /* For use in error reporting, and to access |
|
|
* the interp regexp cache. */ |
|
|
Tcl_Obj *objPtr; /* Object whose string rep contains regular |
|
|
* expression pattern. Internal rep will be |
|
|
* changed to compiled form of this regular |
|
|
* expression. */ |
|
|
int flags; /* Regular expression compilation flags. */ |
|
|
{ |
|
|
int length; |
|
|
Tcl_ObjType *typePtr; |
|
|
TclRegexp *regexpPtr; |
|
|
char *pattern; |
|
|
|
|
|
typePtr = objPtr->typePtr; |
|
|
regexpPtr = (TclRegexp *) objPtr->internalRep.otherValuePtr; |
|
|
|
|
|
if ((typePtr != &tclRegexpType) || (regexpPtr->flags != flags)) { |
|
|
pattern = Tcl_GetStringFromObj(objPtr, &length); |
|
|
|
|
|
regexpPtr = CompileRegexp(interp, pattern, length, flags); |
|
|
if (regexpPtr == NULL) { |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Add a reference to the regexp so it will persist even if it is |
|
|
* pushed out of the current thread's regexp cache. This reference |
|
|
* will be removed when the object's internal rep is freed. |
|
|
*/ |
|
|
|
|
|
regexpPtr->refCount++; |
|
|
|
|
|
/* |
|
|
* Free the old representation and set our type. |
|
|
*/ |
|
|
|
|
|
if ((typePtr != NULL) && (typePtr->freeIntRepProc != NULL)) { |
|
|
(*typePtr->freeIntRepProc)(objPtr); |
|
|
} |
|
|
objPtr->internalRep.otherValuePtr = (VOID *) regexpPtr; |
|
|
objPtr->typePtr = &tclRegexpType; |
|
|
} |
|
|
return (Tcl_RegExp) regexpPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TclRegAbout -- |
|
|
* |
|
|
* Return information about a compiled regular expression. |
|
|
* |
|
|
* Results: |
|
|
* The return value is -1 for failure, 0 for success, although at |
|
|
* the moment there's nothing that could fail. On success, a list |
|
|
* is left in the interp's result: first element is the subexpression |
|
|
* count, second is a list of re_info bit names. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
TclRegAbout(interp, re) |
|
|
Tcl_Interp *interp; /* For use in variable assignment. */ |
|
|
Tcl_RegExp re; /* The compiled regular expression. */ |
|
|
{ |
|
|
TclRegexp *regexpPtr = (TclRegexp *)re; |
|
|
char buf[TCL_INTEGER_SPACE]; |
|
|
static struct infoname { |
|
|
int bit; |
|
|
char *text; |
|
|
} infonames[] = { |
|
|
{REG_UBACKREF, "REG_UBACKREF"}, |
|
|
{REG_ULOOKAHEAD, "REG_ULOOKAHEAD"}, |
|
|
{REG_UBOUNDS, "REG_UBOUNDS"}, |
|
|
{REG_UBRACES, "REG_UBRACES"}, |
|
|
{REG_UBSALNUM, "REG_UBSALNUM"}, |
|
|
{REG_UPBOTCH, "REG_UPBOTCH"}, |
|
|
{REG_UBBS, "REG_UBBS"}, |
|
|
{REG_UNONPOSIX, "REG_UNONPOSIX"}, |
|
|
{REG_UUNSPEC, "REG_UUNSPEC"}, |
|
|
{REG_UUNPORT, "REG_UUNPORT"}, |
|
|
{REG_ULOCALE, "REG_ULOCALE"}, |
|
|
{REG_UEMPTYMATCH, "REG_UEMPTYMATCH"}, |
|
|
{REG_UIMPOSSIBLE, "REG_UIMPOSSIBLE"}, |
|
|
{REG_USHORTEST, "REG_USHORTEST"}, |
|
|
{0, ""} |
|
|
}; |
|
|
struct infoname *inf; |
|
|
int n; |
|
|
|
|
|
Tcl_ResetResult(interp); |
|
|
|
|
|
sprintf(buf, "%u", (unsigned)(regexpPtr->re.re_nsub)); |
|
|
Tcl_AppendElement(interp, buf); |
|
|
|
|
|
/* |
|
|
* Must count bits before generating list, because we must know |
|
|
* whether {} are needed before we start appending names. |
|
|
*/ |
|
|
n = 0; |
|
|
for (inf = infonames; inf->bit != 0; inf++) { |
|
|
if (regexpPtr->re.re_info&inf->bit) { |
|
|
n++; |
|
|
} |
|
|
} |
|
|
if (n != 1) { |
|
|
Tcl_AppendResult(interp, " {", NULL); |
|
|
} |
|
|
for (inf = infonames; inf->bit != 0; inf++) { |
|
|
if (regexpPtr->re.re_info&inf->bit) { |
|
|
Tcl_AppendElement(interp, inf->text); |
|
|
} |
|
|
} |
|
|
if (n != 1) { |
|
|
Tcl_AppendResult(interp, "}", NULL); |
|
|
} |
|
|
|
|
|
return 0; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TclRegError -- |
|
|
* |
|
|
* Generate an error message based on the regexp status code. |
|
|
* |
|
|
* Results: |
|
|
* Places an error in the interpreter. |
|
|
* |
|
|
* Side effects: |
|
|
* Sets errorCode as well. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
TclRegError(interp, msg, status) |
|
|
Tcl_Interp *interp; /* Interpreter for error reporting. */ |
|
|
char *msg; /* Message to prepend to error. */ |
|
|
int status; /* Status code to report. */ |
|
|
{ |
|
|
char buf[100]; /* ample in practice */ |
|
|
char cbuf[100]; /* lots in practice */ |
|
|
size_t n; |
|
|
char *p; |
|
|
|
|
|
Tcl_ResetResult(interp); |
|
|
n = TclReError(status, (regex_t *)NULL, buf, sizeof(buf)); |
|
|
p = (n > sizeof(buf)) ? "..." : ""; |
|
|
Tcl_AppendResult(interp, msg, buf, p, NULL); |
|
|
|
|
|
sprintf(cbuf, "%d", status); |
|
|
(VOID) TclReError(REG_ITOA, (regex_t *)NULL, cbuf, sizeof(cbuf)); |
|
|
Tcl_SetErrorCode(interp, "REGEXP", cbuf, buf, NULL); |
|
|
} |
|
|
|
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* FreeRegexpInternalRep -- |
|
|
* |
|
|
* Deallocate the storage associated with a regexp object's internal |
|
|
* representation. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Frees the compiled regular expression. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
FreeRegexpInternalRep(objPtr) |
|
|
Tcl_Obj *objPtr; /* Regexp object with internal rep to free. */ |
|
|
{ |
|
|
TclRegexp *regexpRepPtr = (TclRegexp *) objPtr->internalRep.otherValuePtr; |
|
|
|
|
|
/* |
|
|
* If this is the last reference to the regexp, free it. |
|
|
*/ |
|
|
|
|
|
if (--(regexpRepPtr->refCount) <= 0) { |
|
|
FreeRegexp(regexpRepPtr); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* DupRegexpInternalRep -- |
|
|
* |
|
|
* We copy the reference to the compiled regexp and bump its |
|
|
* reference count. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Increments the reference count of the regexp. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
DupRegexpInternalRep(srcPtr, copyPtr) |
|
|
Tcl_Obj *srcPtr; /* Object with internal rep to copy. */ |
|
|
Tcl_Obj *copyPtr; /* Object with internal rep to set. */ |
|
|
{ |
|
|
TclRegexp *regexpPtr = (TclRegexp *) srcPtr->internalRep.otherValuePtr; |
|
|
regexpPtr->refCount++; |
|
|
copyPtr->internalRep.otherValuePtr = srcPtr->internalRep.otherValuePtr; |
|
|
copyPtr->typePtr = &tclRegexpType; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* SetRegexpFromAny -- |
|
|
* |
|
|
* Attempt to generate a compiled regular expression for the Tcl object |
|
|
* "objPtr". |
|
|
* |
|
|
* Results: |
|
|
* The return value is TCL_OK or TCL_ERROR. If an error occurs during |
|
|
* conversion, an error message is left in the interpreter's result |
|
|
* unless "interp" is NULL. |
|
|
* |
|
|
* Side effects: |
|
|
* If no error occurs, a regular expression is stored as "objPtr"s |
|
|
* internal representation. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
SetRegexpFromAny(interp, objPtr) |
|
|
Tcl_Interp *interp; /* Used for error reporting if not NULL. */ |
|
|
Tcl_Obj *objPtr; /* The object to convert. */ |
|
|
{ |
|
|
if (Tcl_GetRegExpFromObj(interp, objPtr, REG_ADVANCED) == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*--------------------------------------------------------------------------- |
|
|
* |
|
|
* CompileRegexp -- |
|
|
* |
|
|
* Attempt to compile the given regexp pattern. If the compiled |
|
|
* regular expression can be found in the per-thread cache, it |
|
|
* will be used instead of compiling a new copy. |
|
|
* |
|
|
* Results: |
|
|
* The return value is a pointer to a newly allocated TclRegexp |
|
|
* that represents the compiled pattern, or NULL if the pattern |
|
|
* could not be compiled. If NULL is returned, an error message is |
|
|
* left in the interp's result. |
|
|
* |
|
|
* Side effects: |
|
|
* The thread-local regexp cache is updated and a new TclRegexp may |
|
|
* be allocated. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static TclRegexp * |
|
|
CompileRegexp(interp, string, length, flags) |
|
|
Tcl_Interp *interp; /* Used for error reporting if not NULL. */ |
|
|
char *string; /* The regexp to compile (UTF-8). */ |
|
|
int length; /* The length of the string in bytes. */ |
|
|
int flags; /* Compilation flags. */ |
|
|
{ |
|
|
TclRegexp *regexpPtr; |
|
|
Tcl_UniChar *uniString; |
|
|
int numChars; |
|
|
Tcl_DString stringBuf; |
|
|
int status, i; |
|
|
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); |
|
|
|
|
|
if (!tsdPtr->initialized) { |
|
|
tsdPtr->initialized = 1; |
|
|
Tcl_CreateThreadExitHandler(FinalizeRegexp, NULL); |
|
|
} |
|
|
|
|
|
/* |
|
|
* This routine maintains a second-level regular expression cache in |
|
|
* addition to the per-object regexp cache. The per-thread cache is needed |
|
|
* to handle the case where for various reasons the object is lost between |
|
|
* invocations of the regexp command, but the literal pattern is the same. |
|
|
*/ |
|
|
|
|
|
/* |
|
|
* Check the per-thread compiled regexp cache. We can only reuse |
|
|
* a regexp if it has the same pattern and the same flags. |
|
|
*/ |
|
|
|
|
|
for (i = 0; (i < NUM_REGEXPS) && (tsdPtr->patterns[i] != NULL); i++) { |
|
|
if ((length == tsdPtr->patLengths[i]) |
|
|
&& (tsdPtr->regexps[i]->flags == flags) |
|
|
&& (strcmp(string, tsdPtr->patterns[i]) == 0)) { |
|
|
/* |
|
|
* Move the matched pattern to the first slot in the |
|
|
* cache and shift the other patterns down one position. |
|
|
*/ |
|
|
|
|
|
if (i != 0) { |
|
|
int j; |
|
|
char *cachedString; |
|
|
|
|
|
cachedString = tsdPtr->patterns[i]; |
|
|
regexpPtr = tsdPtr->regexps[i]; |
|
|
for (j = i-1; j >= 0; j--) { |
|
|
tsdPtr->patterns[j+1] = tsdPtr->patterns[j]; |
|
|
tsdPtr->patLengths[j+1] = tsdPtr->patLengths[j]; |
|
|
tsdPtr->regexps[j+1] = tsdPtr->regexps[j]; |
|
|
} |
|
|
tsdPtr->patterns[0] = cachedString; |
|
|
tsdPtr->patLengths[0] = length; |
|
|
tsdPtr->regexps[0] = regexpPtr; |
|
|
} |
|
|
return tsdPtr->regexps[0]; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* This is a new expression, so compile it and add it to the cache. |
|
|
*/ |
|
|
|
|
|
regexpPtr = (TclRegexp *) ckalloc(sizeof(TclRegexp)); |
|
|
regexpPtr->objPtr = NULL; |
|
|
regexpPtr->string = NULL; |
|
|
regexpPtr->details.rm_extend.rm_so = -1; |
|
|
regexpPtr->details.rm_extend.rm_eo = -1; |
|
|
|
|
|
/* |
|
|
* Get the up-to-date string representation and map to unicode. |
|
|
*/ |
|
|
|
|
|
Tcl_DStringInit(&stringBuf); |
|
|
uniString = Tcl_UtfToUniCharDString(string, length, &stringBuf); |
|
|
numChars = Tcl_DStringLength(&stringBuf) / sizeof(Tcl_UniChar); |
|
|
|
|
|
/* |
|
|
* Compile the string and check for errors. |
|
|
*/ |
|
|
|
|
|
regexpPtr->flags = flags; |
|
|
status = TclReComp(®expPtr->re, uniString, (size_t) numChars, flags); |
|
|
Tcl_DStringFree(&stringBuf); |
|
|
|
|
|
if (status != REG_OKAY) { |
|
|
/* |
|
|
* Clean up and report errors in the interpreter, if possible. |
|
|
*/ |
|
|
|
|
|
ckfree((char *)regexpPtr); |
|
|
if (interp) { |
|
|
TclRegError(interp, |
|
|
"couldn't compile regular expression pattern: ", |
|
|
status); |
|
|
} |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Allocate enough space for all of the subexpressions, plus one |
|
|
* extra for the entire pattern. |
|
|
*/ |
|
|
|
|
|
regexpPtr->matches = (regmatch_t *) ckalloc( |
|
|
sizeof(regmatch_t) * (regexpPtr->re.re_nsub + 1)); |
|
|
|
|
|
/* |
|
|
* Initialize the refcount to one initially, since it is in the cache. |
|
|
*/ |
|
|
|
|
|
regexpPtr->refCount = 1; |
|
|
|
|
|
/* |
|
|
* Free the last regexp, if necessary, and make room at the head of the |
|
|
* list for the new regexp. |
|
|
*/ |
|
|
|
|
|
if (tsdPtr->patterns[NUM_REGEXPS-1] != NULL) { |
|
|
TclRegexp *oldRegexpPtr = tsdPtr->regexps[NUM_REGEXPS-1]; |
|
|
if (--(oldRegexpPtr->refCount) <= 0) { |
|
|
FreeRegexp(oldRegexpPtr); |
|
|
} |
|
|
ckfree(tsdPtr->patterns[NUM_REGEXPS-1]); |
|
|
} |
|
|
for (i = NUM_REGEXPS - 2; i >= 0; i--) { |
|
|
tsdPtr->patterns[i+1] = tsdPtr->patterns[i]; |
|
|
tsdPtr->patLengths[i+1] = tsdPtr->patLengths[i]; |
|
|
tsdPtr->regexps[i+1] = tsdPtr->regexps[i]; |
|
|
} |
|
|
tsdPtr->patterns[0] = (char *) ckalloc((unsigned) (length+1)); |
|
|
strcpy(tsdPtr->patterns[0], string); |
|
|
tsdPtr->patLengths[0] = length; |
|
|
tsdPtr->regexps[0] = regexpPtr; |
|
|
|
|
|
return regexpPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* FreeRegexp -- |
|
|
* |
|
|
* Release the storage associated with a TclRegexp. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
FreeRegexp(regexpPtr) |
|
|
TclRegexp *regexpPtr; /* Compiled regular expression to free. */ |
|
|
{ |
|
|
TclReFree(®expPtr->re); |
|
|
if (regexpPtr->matches) { |
|
|
ckfree((char *) regexpPtr->matches); |
|
|
} |
|
|
ckfree((char *) regexpPtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* FinalizeRegexp -- |
|
|
* |
|
|
* Release the storage associated with the per-thread regexp |
|
|
* cache. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
FinalizeRegexp(clientData) |
|
|
ClientData clientData; /* Not used. */ |
|
|
{ |
|
|
int i; |
|
|
TclRegexp *regexpPtr; |
|
|
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); |
|
|
|
|
|
for (i = 0; (i < NUM_REGEXPS) && (tsdPtr->patterns[i] != NULL); i++) { |
|
|
regexpPtr = tsdPtr->regexps[i]; |
|
|
if (--(regexpPtr->refCount) <= 0) { |
|
|
FreeRegexp(regexpPtr); |
|
|
} |
|
|
ckfree(tsdPtr->patterns[i]); |
|
|
} |
|
|
} |
|
|
|
|
|
|
|
|
/* $History: tclregexp.c $ |
|
|
* |
|
|
* ***************** Version 1 ***************** |
|
|
* User: Dtashley Date: 1/02/01 Time: 1:04a |
|
|
* Created in $/IjuScripter, IjuConsole/Source/Tcl Base |
|
|
* Initial check-in. |
|
|
*/ |
|
|
|
|
|
/* End of TCLREGEXP.C */ |
|
| 1 |
|
/* $Header$ */ |
| 2 |
|
/* |
| 3 |
|
* tclRegexp.c -- |
| 4 |
|
* |
| 5 |
|
* This file contains the public interfaces to the Tcl regular |
| 6 |
|
* expression mechanism. |
| 7 |
|
* |
| 8 |
|
* Copyright (c) 1998 by Sun Microsystems, Inc. |
| 9 |
|
* Copyright (c) 1998-1999 by Scriptics Corporation. |
| 10 |
|
* |
| 11 |
|
* See the file "license.terms" for information on usage and redistribution |
| 12 |
|
* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| 13 |
|
* |
| 14 |
|
* RCS: @(#) $Id: tclregexp.c,v 1.1.1.1 2001/06/13 04:45:39 dtashley Exp $ |
| 15 |
|
*/ |
| 16 |
|
|
| 17 |
|
#include "tclInt.h" |
| 18 |
|
#include "tclPort.h" |
| 19 |
|
#include "tclRegexp.h" |
| 20 |
|
|
| 21 |
|
/* |
| 22 |
|
*---------------------------------------------------------------------- |
| 23 |
|
* The routines in this file use Henry Spencer's regular expression |
| 24 |
|
* package contained in the following additional source files: |
| 25 |
|
* |
| 26 |
|
* regc_color.c regc_cvec.c regc_lex.c |
| 27 |
|
* regc_nfa.c regcomp.c regcustom.h |
| 28 |
|
* rege_dfa.c regerror.c regerrs.h |
| 29 |
|
* regex.h regexec.c regfree.c |
| 30 |
|
* regfronts.c regguts.h |
| 31 |
|
* |
| 32 |
|
* Copyright (c) 1998 Henry Spencer. All rights reserved. |
| 33 |
|
* |
| 34 |
|
* Development of this software was funded, in part, by Cray Research Inc., |
| 35 |
|
* UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics |
| 36 |
|
* Corporation, none of whom are responsible for the results. The author |
| 37 |
|
* thanks all of them. |
| 38 |
|
* |
| 39 |
|
* Redistribution and use in source and binary forms -- with or without |
| 40 |
|
* modification -- are permitted for any purpose, provided that |
| 41 |
|
* redistributions in source form retain this entire copyright notice and |
| 42 |
|
* indicate the origin and nature of any modifications. |
| 43 |
|
* |
| 44 |
|
* I'd appreciate being given credit for this package in the documentation |
| 45 |
|
* of software which uses it, but that is not a requirement. |
| 46 |
|
* |
| 47 |
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| 48 |
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY |
| 49 |
|
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL |
| 50 |
|
* HENRY SPENCER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 51 |
|
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 52 |
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| 53 |
|
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 54 |
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| 55 |
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| 56 |
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 57 |
|
* |
| 58 |
|
* *** NOTE: this code has been altered slightly for use in Tcl: *** |
| 59 |
|
* *** 1. Names have been changed, e.g. from re_comp to *** |
| 60 |
|
* *** TclRegComp, to avoid clashes with other *** |
| 61 |
|
* *** regexp implementations used by applications. *** |
| 62 |
|
*/ |
| 63 |
|
|
| 64 |
|
/* |
| 65 |
|
* Thread local storage used to maintain a per-thread cache of compiled |
| 66 |
|
* regular expressions. |
| 67 |
|
*/ |
| 68 |
|
|
| 69 |
|
#define NUM_REGEXPS 30 |
| 70 |
|
|
| 71 |
|
typedef struct ThreadSpecificData { |
| 72 |
|
int initialized; /* Set to 1 when the module is initialized. */ |
| 73 |
|
char *patterns[NUM_REGEXPS];/* Strings corresponding to compiled |
| 74 |
|
* regular expression patterns. NULL |
| 75 |
|
* means that this slot isn't used. |
| 76 |
|
* Malloc-ed. */ |
| 77 |
|
int patLengths[NUM_REGEXPS];/* Number of non-null characters in |
| 78 |
|
* corresponding entry in patterns. |
| 79 |
|
* -1 means entry isn't used. */ |
| 80 |
|
struct TclRegexp *regexps[NUM_REGEXPS]; |
| 81 |
|
/* Compiled forms of above strings. Also |
| 82 |
|
* malloc-ed, or NULL if not in use yet. */ |
| 83 |
|
} ThreadSpecificData; |
| 84 |
|
|
| 85 |
|
static Tcl_ThreadDataKey dataKey; |
| 86 |
|
|
| 87 |
|
/* |
| 88 |
|
* Declarations for functions used only in this file. |
| 89 |
|
*/ |
| 90 |
|
|
| 91 |
|
static TclRegexp * CompileRegexp _ANSI_ARGS_((Tcl_Interp *interp, |
| 92 |
|
char *pattern, int length, int flags)); |
| 93 |
|
static void DupRegexpInternalRep _ANSI_ARGS_((Tcl_Obj *srcPtr, |
| 94 |
|
Tcl_Obj *copyPtr)); |
| 95 |
|
static void FinalizeRegexp _ANSI_ARGS_((ClientData clientData)); |
| 96 |
|
static void FreeRegexp _ANSI_ARGS_((TclRegexp *regexpPtr)); |
| 97 |
|
static void FreeRegexpInternalRep _ANSI_ARGS_((Tcl_Obj *objPtr)); |
| 98 |
|
static int RegExpExecUniChar _ANSI_ARGS_((Tcl_Interp *interp, |
| 99 |
|
Tcl_RegExp re, CONST Tcl_UniChar *uniString, |
| 100 |
|
int numChars, int nmatches, int flags)); |
| 101 |
|
static int SetRegexpFromAny _ANSI_ARGS_((Tcl_Interp *interp, |
| 102 |
|
Tcl_Obj *objPtr)); |
| 103 |
|
|
| 104 |
|
/* |
| 105 |
|
* The regular expression Tcl object type. This serves as a cache |
| 106 |
|
* of the compiled form of the regular expression. |
| 107 |
|
*/ |
| 108 |
|
|
| 109 |
|
Tcl_ObjType tclRegexpType = { |
| 110 |
|
"regexp", /* name */ |
| 111 |
|
FreeRegexpInternalRep, /* freeIntRepProc */ |
| 112 |
|
DupRegexpInternalRep, /* dupIntRepProc */ |
| 113 |
|
NULL, /* updateStringProc */ |
| 114 |
|
SetRegexpFromAny /* setFromAnyProc */ |
| 115 |
|
}; |
| 116 |
|
|
| 117 |
|
|
| 118 |
|
/* |
| 119 |
|
*---------------------------------------------------------------------- |
| 120 |
|
* |
| 121 |
|
* Tcl_RegExpCompile -- |
| 122 |
|
* |
| 123 |
|
* Compile a regular expression into a form suitable for fast |
| 124 |
|
* matching. This procedure is DEPRECATED in favor of the |
| 125 |
|
* object version of the command. |
| 126 |
|
* |
| 127 |
|
* Results: |
| 128 |
|
* The return value is a pointer to the compiled form of string, |
| 129 |
|
* suitable for passing to Tcl_RegExpExec. This compiled form |
| 130 |
|
* is only valid up until the next call to this procedure, so |
| 131 |
|
* don't keep these around for a long time! If an error occurred |
| 132 |
|
* while compiling the pattern, then NULL is returned and an error |
| 133 |
|
* message is left in the interp's result. |
| 134 |
|
* |
| 135 |
|
* Side effects: |
| 136 |
|
* Updates the cache of compiled regexps. |
| 137 |
|
* |
| 138 |
|
*---------------------------------------------------------------------- |
| 139 |
|
*/ |
| 140 |
|
|
| 141 |
|
Tcl_RegExp |
| 142 |
|
Tcl_RegExpCompile(interp, string) |
| 143 |
|
Tcl_Interp *interp; /* For use in error reporting and |
| 144 |
|
* to access the interp regexp cache. */ |
| 145 |
|
char *string; /* String for which to produce |
| 146 |
|
* compiled regular expression. */ |
| 147 |
|
{ |
| 148 |
|
return (Tcl_RegExp) CompileRegexp(interp, string, (int) strlen(string), |
| 149 |
|
REG_ADVANCED); |
| 150 |
|
} |
| 151 |
|
|
| 152 |
|
/* |
| 153 |
|
*---------------------------------------------------------------------- |
| 154 |
|
* |
| 155 |
|
* Tcl_RegExpExec -- |
| 156 |
|
* |
| 157 |
|
* Execute the regular expression matcher using a compiled form |
| 158 |
|
* of a regular expression and save information about any match |
| 159 |
|
* that is found. |
| 160 |
|
* |
| 161 |
|
* Results: |
| 162 |
|
* If an error occurs during the matching operation then -1 |
| 163 |
|
* is returned and the interp's result contains an error message. |
| 164 |
|
* Otherwise the return value is 1 if a matching range is |
| 165 |
|
* found and 0 if there is no matching range. |
| 166 |
|
* |
| 167 |
|
* Side effects: |
| 168 |
|
* None. |
| 169 |
|
* |
| 170 |
|
*---------------------------------------------------------------------- |
| 171 |
|
*/ |
| 172 |
|
|
| 173 |
|
int |
| 174 |
|
Tcl_RegExpExec(interp, re, string, start) |
| 175 |
|
Tcl_Interp *interp; /* Interpreter to use for error reporting. */ |
| 176 |
|
Tcl_RegExp re; /* Compiled regular expression; must have |
| 177 |
|
* been returned by previous call to |
| 178 |
|
* Tcl_GetRegExpFromObj. */ |
| 179 |
|
CONST char *string; /* String against which to match re. */ |
| 180 |
|
CONST char *start; /* If string is part of a larger string, |
| 181 |
|
* this identifies beginning of larger |
| 182 |
|
* string, so that "^" won't match. */ |
| 183 |
|
{ |
| 184 |
|
int flags, result, numChars; |
| 185 |
|
TclRegexp *regexp = (TclRegexp *)re; |
| 186 |
|
Tcl_DString ds; |
| 187 |
|
Tcl_UniChar *ustr; |
| 188 |
|
|
| 189 |
|
/* |
| 190 |
|
* If the starting point is offset from the beginning of the buffer, |
| 191 |
|
* then we need to tell the regexp engine not to match "^". |
| 192 |
|
*/ |
| 193 |
|
|
| 194 |
|
if (string > start) { |
| 195 |
|
flags = REG_NOTBOL; |
| 196 |
|
} else { |
| 197 |
|
flags = 0; |
| 198 |
|
} |
| 199 |
|
|
| 200 |
|
/* |
| 201 |
|
* Remember the string for use by Tcl_RegExpRange(). |
| 202 |
|
*/ |
| 203 |
|
|
| 204 |
|
regexp->string = string; |
| 205 |
|
regexp->objPtr = NULL; |
| 206 |
|
|
| 207 |
|
/* |
| 208 |
|
* Convert the string to Unicode and perform the match. |
| 209 |
|
*/ |
| 210 |
|
|
| 211 |
|
Tcl_DStringInit(&ds); |
| 212 |
|
ustr = Tcl_UtfToUniCharDString(string, -1, &ds); |
| 213 |
|
numChars = Tcl_DStringLength(&ds) / sizeof(Tcl_UniChar); |
| 214 |
|
result = RegExpExecUniChar(interp, re, ustr, numChars, |
| 215 |
|
-1 /* nmatches */, flags); |
| 216 |
|
Tcl_DStringFree(&ds); |
| 217 |
|
|
| 218 |
|
return result; |
| 219 |
|
} |
| 220 |
|
|
| 221 |
|
/* |
| 222 |
|
*--------------------------------------------------------------------------- |
| 223 |
|
* |
| 224 |
|
* Tcl_RegExpRange -- |
| 225 |
|
* |
| 226 |
|
* Returns pointers describing the range of a regular expression match, |
| 227 |
|
* or one of the subranges within the match. |
| 228 |
|
* |
| 229 |
|
* Results: |
| 230 |
|
* The variables at *startPtr and *endPtr are modified to hold the |
| 231 |
|
* addresses of the endpoints of the range given by index. If the |
| 232 |
|
* specified range doesn't exist then NULLs are returned. |
| 233 |
|
* |
| 234 |
|
* Side effects: |
| 235 |
|
* None. |
| 236 |
|
* |
| 237 |
|
*--------------------------------------------------------------------------- |
| 238 |
|
*/ |
| 239 |
|
|
| 240 |
|
void |
| 241 |
|
Tcl_RegExpRange(re, index, startPtr, endPtr) |
| 242 |
|
Tcl_RegExp re; /* Compiled regular expression that has |
| 243 |
|
* been passed to Tcl_RegExpExec. */ |
| 244 |
|
int index; /* 0 means give the range of the entire |
| 245 |
|
* match, > 0 means give the range of |
| 246 |
|
* a matching subrange. */ |
| 247 |
|
char **startPtr; /* Store address of first character in |
| 248 |
|
* (sub-) range here. */ |
| 249 |
|
char **endPtr; /* Store address of character just after last |
| 250 |
|
* in (sub-) range here. */ |
| 251 |
|
{ |
| 252 |
|
TclRegexp *regexpPtr = (TclRegexp *) re; |
| 253 |
|
CONST char *string; |
| 254 |
|
|
| 255 |
|
if ((size_t) index > regexpPtr->re.re_nsub) { |
| 256 |
|
*startPtr = *endPtr = NULL; |
| 257 |
|
} else if (regexpPtr->matches[index].rm_so < 0) { |
| 258 |
|
*startPtr = *endPtr = NULL; |
| 259 |
|
} else { |
| 260 |
|
if (regexpPtr->objPtr) { |
| 261 |
|
string = Tcl_GetString(regexpPtr->objPtr); |
| 262 |
|
} else { |
| 263 |
|
string = regexpPtr->string; |
| 264 |
|
} |
| 265 |
|
*startPtr = Tcl_UtfAtIndex(string, regexpPtr->matches[index].rm_so); |
| 266 |
|
*endPtr = Tcl_UtfAtIndex(string, regexpPtr->matches[index].rm_eo); |
| 267 |
|
} |
| 268 |
|
} |
| 269 |
|
|
| 270 |
|
/* |
| 271 |
|
*--------------------------------------------------------------------------- |
| 272 |
|
* |
| 273 |
|
* RegExpExecUniChar -- |
| 274 |
|
* |
| 275 |
|
* Execute the regular expression matcher using a compiled form of a |
| 276 |
|
* regular expression and save information about any match that is |
| 277 |
|
* found. |
| 278 |
|
* |
| 279 |
|
* Results: |
| 280 |
|
* If an error occurs during the matching operation then -1 is |
| 281 |
|
* returned and an error message is left in interp's result. |
| 282 |
|
* Otherwise the return value is 1 if a matching range was found or |
| 283 |
|
* 0 if there was no matching range. |
| 284 |
|
* |
| 285 |
|
* Side effects: |
| 286 |
|
* None. |
| 287 |
|
* |
| 288 |
|
*---------------------------------------------------------------------- |
| 289 |
|
*/ |
| 290 |
|
|
| 291 |
|
static int |
| 292 |
|
RegExpExecUniChar(interp, re, wString, numChars, nmatches, flags) |
| 293 |
|
Tcl_Interp *interp; /* Interpreter to use for error reporting. */ |
| 294 |
|
Tcl_RegExp re; /* Compiled regular expression; returned by |
| 295 |
|
* a previous call to Tcl_GetRegExpFromObj */ |
| 296 |
|
CONST Tcl_UniChar *wString; /* String against which to match re. */ |
| 297 |
|
int numChars; /* Length of Tcl_UniChar string (must |
| 298 |
|
* be >= 0). */ |
| 299 |
|
int nmatches; /* How many subexpression matches (counting |
| 300 |
|
* the whole match as subexpression 0) are |
| 301 |
|
* of interest. -1 means "don't know". */ |
| 302 |
|
int flags; /* Regular expression flags. */ |
| 303 |
|
{ |
| 304 |
|
int status; |
| 305 |
|
TclRegexp *regexpPtr = (TclRegexp *) re; |
| 306 |
|
size_t last = regexpPtr->re.re_nsub + 1; |
| 307 |
|
size_t nm = last; |
| 308 |
|
|
| 309 |
|
if (nmatches >= 0 && (size_t) nmatches < nm) { |
| 310 |
|
nm = (size_t) nmatches; |
| 311 |
|
} |
| 312 |
|
|
| 313 |
|
status = TclReExec(®expPtr->re, wString, (size_t) numChars, |
| 314 |
|
®expPtr->details, nm, regexpPtr->matches, flags); |
| 315 |
|
|
| 316 |
|
/* |
| 317 |
|
* Check for errors. |
| 318 |
|
*/ |
| 319 |
|
|
| 320 |
|
if (status != REG_OKAY) { |
| 321 |
|
if (status == REG_NOMATCH) { |
| 322 |
|
return 0; |
| 323 |
|
} |
| 324 |
|
if (interp != NULL) { |
| 325 |
|
TclRegError(interp, "error while matching regular expression: ", |
| 326 |
|
status); |
| 327 |
|
} |
| 328 |
|
return -1; |
| 329 |
|
} |
| 330 |
|
return 1; |
| 331 |
|
} |
| 332 |
|
|
| 333 |
|
/* |
| 334 |
|
*--------------------------------------------------------------------------- |
| 335 |
|
* |
| 336 |
|
* TclRegExpRangeUniChar -- |
| 337 |
|
* |
| 338 |
|
* Returns pointers describing the range of a regular expression match, |
| 339 |
|
* or one of the subranges within the match, or the hypothetical range |
| 340 |
|
* represented by the rm_extend field of the rm_detail_t. |
| 341 |
|
* |
| 342 |
|
* Results: |
| 343 |
|
* The variables at *startPtr and *endPtr are modified to hold the |
| 344 |
|
* offsets of the endpoints of the range given by index. If the |
| 345 |
|
* specified range doesn't exist then -1s are supplied. |
| 346 |
|
* |
| 347 |
|
* Side effects: |
| 348 |
|
* None. |
| 349 |
|
* |
| 350 |
|
*--------------------------------------------------------------------------- |
| 351 |
|
*/ |
| 352 |
|
|
| 353 |
|
void |
| 354 |
|
TclRegExpRangeUniChar(re, index, startPtr, endPtr) |
| 355 |
|
Tcl_RegExp re; /* Compiled regular expression that has |
| 356 |
|
* been passed to Tcl_RegExpExec. */ |
| 357 |
|
int index; /* 0 means give the range of the entire |
| 358 |
|
* match, > 0 means give the range of |
| 359 |
|
* a matching subrange, -1 means the |
| 360 |
|
* range of the rm_extend field. */ |
| 361 |
|
int *startPtr; /* Store address of first character in |
| 362 |
|
* (sub-) range here. */ |
| 363 |
|
int *endPtr; /* Store address of character just after last |
| 364 |
|
* in (sub-) range here. */ |
| 365 |
|
{ |
| 366 |
|
TclRegexp *regexpPtr = (TclRegexp *) re; |
| 367 |
|
|
| 368 |
|
if ((regexpPtr->flags®_EXPECT) && index == -1) { |
| 369 |
|
*startPtr = regexpPtr->details.rm_extend.rm_so; |
| 370 |
|
*endPtr = regexpPtr->details.rm_extend.rm_eo; |
| 371 |
|
} else if ((size_t) index > regexpPtr->re.re_nsub) { |
| 372 |
|
*startPtr = -1; |
| 373 |
|
*endPtr = -1; |
| 374 |
|
} else { |
| 375 |
|
*startPtr = regexpPtr->matches[index].rm_so; |
| 376 |
|
*endPtr = regexpPtr->matches[index].rm_eo; |
| 377 |
|
} |
| 378 |
|
} |
| 379 |
|
|
| 380 |
|
/* |
| 381 |
|
*---------------------------------------------------------------------- |
| 382 |
|
* |
| 383 |
|
* Tcl_RegExpMatch -- |
| 384 |
|
* |
| 385 |
|
* See if a string matches a regular expression. |
| 386 |
|
* |
| 387 |
|
* Results: |
| 388 |
|
* If an error occurs during the matching operation then -1 |
| 389 |
|
* is returned and the interp's result contains an error message. |
| 390 |
|
* Otherwise the return value is 1 if "string" matches "pattern" |
| 391 |
|
* and 0 otherwise. |
| 392 |
|
* |
| 393 |
|
* Side effects: |
| 394 |
|
* None. |
| 395 |
|
* |
| 396 |
|
*---------------------------------------------------------------------- |
| 397 |
|
*/ |
| 398 |
|
|
| 399 |
|
int |
| 400 |
|
Tcl_RegExpMatch(interp, string, pattern) |
| 401 |
|
Tcl_Interp *interp; /* Used for error reporting. May be NULL. */ |
| 402 |
|
char *string; /* String. */ |
| 403 |
|
char *pattern; /* Regular expression to match against |
| 404 |
|
* string. */ |
| 405 |
|
{ |
| 406 |
|
Tcl_RegExp re; |
| 407 |
|
|
| 408 |
|
re = Tcl_RegExpCompile(interp, pattern); |
| 409 |
|
if (re == NULL) { |
| 410 |
|
return -1; |
| 411 |
|
} |
| 412 |
|
return Tcl_RegExpExec(interp, re, string, string); |
| 413 |
|
} |
| 414 |
|
|
| 415 |
|
/* |
| 416 |
|
*---------------------------------------------------------------------- |
| 417 |
|
* |
| 418 |
|
* Tcl_RegExpExecObj -- |
| 419 |
|
* |
| 420 |
|
* Execute a precompiled regexp against the given object. |
| 421 |
|
* |
| 422 |
|
* Results: |
| 423 |
|
* If an error occurs during the matching operation then -1 |
| 424 |
|
* is returned and the interp's result contains an error message. |
| 425 |
|
* Otherwise the return value is 1 if "string" matches "pattern" |
| 426 |
|
* and 0 otherwise. |
| 427 |
|
* |
| 428 |
|
* Side effects: |
| 429 |
|
* Converts the object to a Unicode object. |
| 430 |
|
* |
| 431 |
|
*---------------------------------------------------------------------- |
| 432 |
|
*/ |
| 433 |
|
|
| 434 |
|
int |
| 435 |
|
Tcl_RegExpExecObj(interp, re, objPtr, offset, nmatches, flags) |
| 436 |
|
Tcl_Interp *interp; /* Interpreter to use for error reporting. */ |
| 437 |
|
Tcl_RegExp re; /* Compiled regular expression; must have |
| 438 |
|
* been returned by previous call to |
| 439 |
|
* Tcl_GetRegExpFromObj. */ |
| 440 |
|
Tcl_Obj *objPtr; /* String against which to match re. */ |
| 441 |
|
int offset; /* Character index that marks where matching |
| 442 |
|
* should begin. */ |
| 443 |
|
int nmatches; /* How many subexpression matches (counting |
| 444 |
|
* the whole match as subexpression 0) are |
| 445 |
|
* of interest. -1 means all of them. */ |
| 446 |
|
int flags; /* Regular expression execution flags. */ |
| 447 |
|
{ |
| 448 |
|
TclRegexp *regexpPtr = (TclRegexp *) re; |
| 449 |
|
Tcl_UniChar *udata; |
| 450 |
|
int length; |
| 451 |
|
|
| 452 |
|
/* |
| 453 |
|
* Save the target object so we can extract strings from it later. |
| 454 |
|
*/ |
| 455 |
|
|
| 456 |
|
regexpPtr->string = NULL; |
| 457 |
|
regexpPtr->objPtr = objPtr; |
| 458 |
|
|
| 459 |
|
udata = Tcl_GetUnicode(objPtr); |
| 460 |
|
length = Tcl_GetCharLength(objPtr); |
| 461 |
|
|
| 462 |
|
if (offset > length) { |
| 463 |
|
offset = length; |
| 464 |
|
} |
| 465 |
|
udata += offset; |
| 466 |
|
length -= offset; |
| 467 |
|
|
| 468 |
|
return RegExpExecUniChar(interp, re, udata, length, nmatches, flags); |
| 469 |
|
} |
| 470 |
|
|
| 471 |
|
/* |
| 472 |
|
*---------------------------------------------------------------------- |
| 473 |
|
* |
| 474 |
|
* Tcl_RegExpMatchObj -- |
| 475 |
|
* |
| 476 |
|
* See if an object matches a regular expression. |
| 477 |
|
* |
| 478 |
|
* Results: |
| 479 |
|
* If an error occurs during the matching operation then -1 |
| 480 |
|
* is returned and the interp's result contains an error message. |
| 481 |
|
* Otherwise the return value is 1 if "string" matches "pattern" |
| 482 |
|
* and 0 otherwise. |
| 483 |
|
* |
| 484 |
|
* Side effects: |
| 485 |
|
* Changes the internal rep of the pattern and string objects. |
| 486 |
|
* |
| 487 |
|
*---------------------------------------------------------------------- |
| 488 |
|
*/ |
| 489 |
|
|
| 490 |
|
int |
| 491 |
|
Tcl_RegExpMatchObj(interp, stringObj, patternObj) |
| 492 |
|
Tcl_Interp *interp; /* Used for error reporting. May be NULL. */ |
| 493 |
|
Tcl_Obj *stringObj; /* Object containing the String to search. */ |
| 494 |
|
Tcl_Obj *patternObj; /* Regular expression to match against |
| 495 |
|
* string. */ |
| 496 |
|
{ |
| 497 |
|
Tcl_RegExp re; |
| 498 |
|
|
| 499 |
|
re = Tcl_GetRegExpFromObj(interp, patternObj, |
| 500 |
|
TCL_REG_ADVANCED | TCL_REG_NOSUB); |
| 501 |
|
if (re == NULL) { |
| 502 |
|
return -1; |
| 503 |
|
} |
| 504 |
|
return Tcl_RegExpExecObj(interp, re, stringObj, 0 /* offset */, |
| 505 |
|
0 /* nmatches */, 0 /* flags */); |
| 506 |
|
} |
| 507 |
|
|
| 508 |
|
/* |
| 509 |
|
*---------------------------------------------------------------------- |
| 510 |
|
* |
| 511 |
|
* Tcl_RegExpGetInfo -- |
| 512 |
|
* |
| 513 |
|
* Retrieve information about the current match. |
| 514 |
|
* |
| 515 |
|
* Results: |
| 516 |
|
* None. |
| 517 |
|
* |
| 518 |
|
* Side effects: |
| 519 |
|
* None. |
| 520 |
|
* |
| 521 |
|
*---------------------------------------------------------------------- |
| 522 |
|
*/ |
| 523 |
|
|
| 524 |
|
void |
| 525 |
|
Tcl_RegExpGetInfo(regexp, infoPtr) |
| 526 |
|
Tcl_RegExp regexp; /* Pattern from which to get subexpressions. */ |
| 527 |
|
Tcl_RegExpInfo *infoPtr; /* Match information is stored here. */ |
| 528 |
|
{ |
| 529 |
|
TclRegexp *regexpPtr = (TclRegexp *) regexp; |
| 530 |
|
|
| 531 |
|
infoPtr->nsubs = regexpPtr->re.re_nsub; |
| 532 |
|
infoPtr->matches = (Tcl_RegExpIndices *) regexpPtr->matches; |
| 533 |
|
infoPtr->extendStart = regexpPtr->details.rm_extend.rm_so; |
| 534 |
|
} |
| 535 |
|
|
| 536 |
|
/* |
| 537 |
|
*---------------------------------------------------------------------- |
| 538 |
|
* |
| 539 |
|
* Tcl_GetRegExpFromObj -- |
| 540 |
|
* |
| 541 |
|
* Compile a regular expression into a form suitable for fast |
| 542 |
|
* matching. This procedure caches the result in a Tcl_Obj. |
| 543 |
|
* |
| 544 |
|
* Results: |
| 545 |
|
* The return value is a pointer to the compiled form of string, |
| 546 |
|
* suitable for passing to Tcl_RegExpExec. If an error occurred |
| 547 |
|
* while compiling the pattern, then NULL is returned and an error |
| 548 |
|
* message is left in the interp's result. |
| 549 |
|
* |
| 550 |
|
* Side effects: |
| 551 |
|
* Updates the native rep of the Tcl_Obj. |
| 552 |
|
* |
| 553 |
|
*---------------------------------------------------------------------- |
| 554 |
|
*/ |
| 555 |
|
|
| 556 |
|
Tcl_RegExp |
| 557 |
|
Tcl_GetRegExpFromObj(interp, objPtr, flags) |
| 558 |
|
Tcl_Interp *interp; /* For use in error reporting, and to access |
| 559 |
|
* the interp regexp cache. */ |
| 560 |
|
Tcl_Obj *objPtr; /* Object whose string rep contains regular |
| 561 |
|
* expression pattern. Internal rep will be |
| 562 |
|
* changed to compiled form of this regular |
| 563 |
|
* expression. */ |
| 564 |
|
int flags; /* Regular expression compilation flags. */ |
| 565 |
|
{ |
| 566 |
|
int length; |
| 567 |
|
Tcl_ObjType *typePtr; |
| 568 |
|
TclRegexp *regexpPtr; |
| 569 |
|
char *pattern; |
| 570 |
|
|
| 571 |
|
typePtr = objPtr->typePtr; |
| 572 |
|
regexpPtr = (TclRegexp *) objPtr->internalRep.otherValuePtr; |
| 573 |
|
|
| 574 |
|
if ((typePtr != &tclRegexpType) || (regexpPtr->flags != flags)) { |
| 575 |
|
pattern = Tcl_GetStringFromObj(objPtr, &length); |
| 576 |
|
|
| 577 |
|
regexpPtr = CompileRegexp(interp, pattern, length, flags); |
| 578 |
|
if (regexpPtr == NULL) { |
| 579 |
|
return NULL; |
| 580 |
|
} |
| 581 |
|
|
| 582 |
|
/* |
| 583 |
|
* Add a reference to the regexp so it will persist even if it is |
| 584 |
|
* pushed out of the current thread's regexp cache. This reference |
| 585 |
|
* will be removed when the object's internal rep is freed. |
| 586 |
|
*/ |
| 587 |
|
|
| 588 |
|
regexpPtr->refCount++; |
| 589 |
|
|
| 590 |
|
/* |
| 591 |
|
* Free the old representation and set our type. |
| 592 |
|
*/ |
| 593 |
|
|
| 594 |
|
if ((typePtr != NULL) && (typePtr->freeIntRepProc != NULL)) { |
| 595 |
|
(*typePtr->freeIntRepProc)(objPtr); |
| 596 |
|
} |
| 597 |
|
objPtr->internalRep.otherValuePtr = (VOID *) regexpPtr; |
| 598 |
|
objPtr->typePtr = &tclRegexpType; |
| 599 |
|
} |
| 600 |
|
return (Tcl_RegExp) regexpPtr; |
| 601 |
|
} |
| 602 |
|
|
| 603 |
|
/* |
| 604 |
|
*---------------------------------------------------------------------- |
| 605 |
|
* |
| 606 |
|
* TclRegAbout -- |
| 607 |
|
* |
| 608 |
|
* Return information about a compiled regular expression. |
| 609 |
|
* |
| 610 |
|
* Results: |
| 611 |
|
* The return value is -1 for failure, 0 for success, although at |
| 612 |
|
* the moment there's nothing that could fail. On success, a list |
| 613 |
|
* is left in the interp's result: first element is the subexpression |
| 614 |
|
* count, second is a list of re_info bit names. |
| 615 |
|
* |
| 616 |
|
* Side effects: |
| 617 |
|
* None. |
| 618 |
|
* |
| 619 |
|
*---------------------------------------------------------------------- |
| 620 |
|
*/ |
| 621 |
|
|
| 622 |
|
int |
| 623 |
|
TclRegAbout(interp, re) |
| 624 |
|
Tcl_Interp *interp; /* For use in variable assignment. */ |
| 625 |
|
Tcl_RegExp re; /* The compiled regular expression. */ |
| 626 |
|
{ |
| 627 |
|
TclRegexp *regexpPtr = (TclRegexp *)re; |
| 628 |
|
char buf[TCL_INTEGER_SPACE]; |
| 629 |
|
static struct infoname { |
| 630 |
|
int bit; |
| 631 |
|
char *text; |
| 632 |
|
} infonames[] = { |
| 633 |
|
{REG_UBACKREF, "REG_UBACKREF"}, |
| 634 |
|
{REG_ULOOKAHEAD, "REG_ULOOKAHEAD"}, |
| 635 |
|
{REG_UBOUNDS, "REG_UBOUNDS"}, |
| 636 |
|
{REG_UBRACES, "REG_UBRACES"}, |
| 637 |
|
{REG_UBSALNUM, "REG_UBSALNUM"}, |
| 638 |
|
{REG_UPBOTCH, "REG_UPBOTCH"}, |
| 639 |
|
{REG_UBBS, "REG_UBBS"}, |
| 640 |
|
{REG_UNONPOSIX, "REG_UNONPOSIX"}, |
| 641 |
|
{REG_UUNSPEC, "REG_UUNSPEC"}, |
| 642 |
|
{REG_UUNPORT, "REG_UUNPORT"}, |
| 643 |
|
{REG_ULOCALE, "REG_ULOCALE"}, |
| 644 |
|
{REG_UEMPTYMATCH, "REG_UEMPTYMATCH"}, |
| 645 |
|
{REG_UIMPOSSIBLE, "REG_UIMPOSSIBLE"}, |
| 646 |
|
{REG_USHORTEST, "REG_USHORTEST"}, |
| 647 |
|
{0, ""} |
| 648 |
|
}; |
| 649 |
|
struct infoname *inf; |
| 650 |
|
int n; |
| 651 |
|
|
| 652 |
|
Tcl_ResetResult(interp); |
| 653 |
|
|
| 654 |
|
sprintf(buf, "%u", (unsigned)(regexpPtr->re.re_nsub)); |
| 655 |
|
Tcl_AppendElement(interp, buf); |
| 656 |
|
|
| 657 |
|
/* |
| 658 |
|
* Must count bits before generating list, because we must know |
| 659 |
|
* whether {} are needed before we start appending names. |
| 660 |
|
*/ |
| 661 |
|
n = 0; |
| 662 |
|
for (inf = infonames; inf->bit != 0; inf++) { |
| 663 |
|
if (regexpPtr->re.re_info&inf->bit) { |
| 664 |
|
n++; |
| 665 |
|
} |
| 666 |
|
} |
| 667 |
|
if (n != 1) { |
| 668 |
|
Tcl_AppendResult(interp, " {", NULL); |
| 669 |
|
} |
| 670 |
|
for (inf = infonames; inf->bit != 0; inf++) { |
| 671 |
|
if (regexpPtr->re.re_info&inf->bit) { |
| 672 |
|
Tcl_AppendElement(interp, inf->text); |
| 673 |
|
} |
| 674 |
|
} |
| 675 |
|
if (n != 1) { |
| 676 |
|
Tcl_AppendResult(interp, "}", NULL); |
| 677 |
|
} |
| 678 |
|
|
| 679 |
|
return 0; |
| 680 |
|
} |
| 681 |
|
|
| 682 |
|
/* |
| 683 |
|
*---------------------------------------------------------------------- |
| 684 |
|
* |
| 685 |
|
* TclRegError -- |
| 686 |
|
* |
| 687 |
|
* Generate an error message based on the regexp status code. |
| 688 |
|
* |
| 689 |
|
* Results: |
| 690 |
|
* Places an error in the interpreter. |
| 691 |
|
* |
| 692 |
|
* Side effects: |
| 693 |
|
* Sets errorCode as well. |
| 694 |
|
* |
| 695 |
|
*---------------------------------------------------------------------- |
| 696 |
|
*/ |
| 697 |
|
|
| 698 |
|
void |
| 699 |
|
TclRegError(interp, msg, status) |
| 700 |
|
Tcl_Interp *interp; /* Interpreter for error reporting. */ |
| 701 |
|
char *msg; /* Message to prepend to error. */ |
| 702 |
|
int status; /* Status code to report. */ |
| 703 |
|
{ |
| 704 |
|
char buf[100]; /* ample in practice */ |
| 705 |
|
char cbuf[100]; /* lots in practice */ |
| 706 |
|
size_t n; |
| 707 |
|
char *p; |
| 708 |
|
|
| 709 |
|
Tcl_ResetResult(interp); |
| 710 |
|
n = TclReError(status, (regex_t *)NULL, buf, sizeof(buf)); |
| 711 |
|
p = (n > sizeof(buf)) ? "..." : ""; |
| 712 |
|
Tcl_AppendResult(interp, msg, buf, p, NULL); |
| 713 |
|
|
| 714 |
|
sprintf(cbuf, "%d", status); |
| 715 |
|
(VOID) TclReError(REG_ITOA, (regex_t *)NULL, cbuf, sizeof(cbuf)); |
| 716 |
|
Tcl_SetErrorCode(interp, "REGEXP", cbuf, buf, NULL); |
| 717 |
|
} |
| 718 |
|
|
| 719 |
|
|
| 720 |
|
/* |
| 721 |
|
*---------------------------------------------------------------------- |
| 722 |
|
* |
| 723 |
|
* FreeRegexpInternalRep -- |
| 724 |
|
* |
| 725 |
|
* Deallocate the storage associated with a regexp object's internal |
| 726 |
|
* representation. |
| 727 |
|
* |
| 728 |
|
* Results: |
| 729 |
|
* None. |
| 730 |
|
* |
| 731 |
|
* Side effects: |
| 732 |
|
* Frees the compiled regular expression. |
| 733 |
|
* |
| 734 |
|
*---------------------------------------------------------------------- |
| 735 |
|
*/ |
| 736 |
|
|
| 737 |
|
static void |
| 738 |
|
FreeRegexpInternalRep(objPtr) |
| 739 |
|
Tcl_Obj *objPtr; /* Regexp object with internal rep to free. */ |
| 740 |
|
{ |
| 741 |
|
TclRegexp *regexpRepPtr = (TclRegexp *) objPtr->internalRep.otherValuePtr; |
| 742 |
|
|
| 743 |
|
/* |
| 744 |
|
* If this is the last reference to the regexp, free it. |
| 745 |
|
*/ |
| 746 |
|
|
| 747 |
|
if (--(regexpRepPtr->refCount) <= 0) { |
| 748 |
|
FreeRegexp(regexpRepPtr); |
| 749 |
|
} |
| 750 |
|
} |
| 751 |
|
|
| 752 |
|
/* |
| 753 |
|
*---------------------------------------------------------------------- |
| 754 |
|
* |
| 755 |
|
* DupRegexpInternalRep -- |
| 756 |
|
* |
| 757 |
|
* We copy the reference to the compiled regexp and bump its |
| 758 |
|
* reference count. |
| 759 |
|
* |
| 760 |
|
* Results: |
| 761 |
|
* None. |
| 762 |
|
* |
| 763 |
|
* Side effects: |
| 764 |
|
* Increments the reference count of the regexp. |
| 765 |
|
* |
| 766 |
|
*---------------------------------------------------------------------- |
| 767 |
|
*/ |
| 768 |
|
|
| 769 |
|
static void |
| 770 |
|
DupRegexpInternalRep(srcPtr, copyPtr) |
| 771 |
|
Tcl_Obj *srcPtr; /* Object with internal rep to copy. */ |
| 772 |
|
Tcl_Obj *copyPtr; /* Object with internal rep to set. */ |
| 773 |
|
{ |
| 774 |
|
TclRegexp *regexpPtr = (TclRegexp *) srcPtr->internalRep.otherValuePtr; |
| 775 |
|
regexpPtr->refCount++; |
| 776 |
|
copyPtr->internalRep.otherValuePtr = srcPtr->internalRep.otherValuePtr; |
| 777 |
|
copyPtr->typePtr = &tclRegexpType; |
| 778 |
|
} |
| 779 |
|
|
| 780 |
|
/* |
| 781 |
|
*---------------------------------------------------------------------- |
| 782 |
|
* |
| 783 |
|
* SetRegexpFromAny -- |
| 784 |
|
* |
| 785 |
|
* Attempt to generate a compiled regular expression for the Tcl object |
| 786 |
|
* "objPtr". |
| 787 |
|
* |
| 788 |
|
* Results: |
| 789 |
|
* The return value is TCL_OK or TCL_ERROR. If an error occurs during |
| 790 |
|
* conversion, an error message is left in the interpreter's result |
| 791 |
|
* unless "interp" is NULL. |
| 792 |
|
* |
| 793 |
|
* Side effects: |
| 794 |
|
* If no error occurs, a regular expression is stored as "objPtr"s |
| 795 |
|
* internal representation. |
| 796 |
|
* |
| 797 |
|
*---------------------------------------------------------------------- |
| 798 |
|
*/ |
| 799 |
|
|
| 800 |
|
static int |
| 801 |
|
SetRegexpFromAny(interp, objPtr) |
| 802 |
|
Tcl_Interp *interp; /* Used for error reporting if not NULL. */ |
| 803 |
|
Tcl_Obj *objPtr; /* The object to convert. */ |
| 804 |
|
{ |
| 805 |
|
if (Tcl_GetRegExpFromObj(interp, objPtr, REG_ADVANCED) == NULL) { |
| 806 |
|
return TCL_ERROR; |
| 807 |
|
} |
| 808 |
|
return TCL_OK; |
| 809 |
|
} |
| 810 |
|
|
| 811 |
|
/* |
| 812 |
|
*--------------------------------------------------------------------------- |
| 813 |
|
* |
| 814 |
|
* CompileRegexp -- |
| 815 |
|
* |
| 816 |
|
* Attempt to compile the given regexp pattern. If the compiled |
| 817 |
|
* regular expression can be found in the per-thread cache, it |
| 818 |
|
* will be used instead of compiling a new copy. |
| 819 |
|
* |
| 820 |
|
* Results: |
| 821 |
|
* The return value is a pointer to a newly allocated TclRegexp |
| 822 |
|
* that represents the compiled pattern, or NULL if the pattern |
| 823 |
|
* could not be compiled. If NULL is returned, an error message is |
| 824 |
|
* left in the interp's result. |
| 825 |
|
* |
| 826 |
|
* Side effects: |
| 827 |
|
* The thread-local regexp cache is updated and a new TclRegexp may |
| 828 |
|
* be allocated. |
| 829 |
|
* |
| 830 |
|
*---------------------------------------------------------------------- |
| 831 |
|
*/ |
| 832 |
|
|
| 833 |
|
static TclRegexp * |
| 834 |
|
CompileRegexp(interp, string, length, flags) |
| 835 |
|
Tcl_Interp *interp; /* Used for error reporting if not NULL. */ |
| 836 |
|
char *string; /* The regexp to compile (UTF-8). */ |
| 837 |
|
int length; /* The length of the string in bytes. */ |
| 838 |
|
int flags; /* Compilation flags. */ |
| 839 |
|
{ |
| 840 |
|
TclRegexp *regexpPtr; |
| 841 |
|
Tcl_UniChar *uniString; |
| 842 |
|
int numChars; |
| 843 |
|
Tcl_DString stringBuf; |
| 844 |
|
int status, i; |
| 845 |
|
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); |
| 846 |
|
|
| 847 |
|
if (!tsdPtr->initialized) { |
| 848 |
|
tsdPtr->initialized = 1; |
| 849 |
|
Tcl_CreateThreadExitHandler(FinalizeRegexp, NULL); |
| 850 |
|
} |
| 851 |
|
|
| 852 |
|
/* |
| 853 |
|
* This routine maintains a second-level regular expression cache in |
| 854 |
|
* addition to the per-object regexp cache. The per-thread cache is needed |
| 855 |
|
* to handle the case where for various reasons the object is lost between |
| 856 |
|
* invocations of the regexp command, but the literal pattern is the same. |
| 857 |
|
*/ |
| 858 |
|
|
| 859 |
|
/* |
| 860 |
|
* Check the per-thread compiled regexp cache. We can only reuse |
| 861 |
|
* a regexp if it has the same pattern and the same flags. |
| 862 |
|
*/ |
| 863 |
|
|
| 864 |
|
for (i = 0; (i < NUM_REGEXPS) && (tsdPtr->patterns[i] != NULL); i++) { |
| 865 |
|
if ((length == tsdPtr->patLengths[i]) |
| 866 |
|
&& (tsdPtr->regexps[i]->flags == flags) |
| 867 |
|
&& (strcmp(string, tsdPtr->patterns[i]) == 0)) { |
| 868 |
|
/* |
| 869 |
|
* Move the matched pattern to the first slot in the |
| 870 |
|
* cache and shift the other patterns down one position. |
| 871 |
|
*/ |
| 872 |
|
|
| 873 |
|
if (i != 0) { |
| 874 |
|
int j; |
| 875 |
|
char *cachedString; |
| 876 |
|
|
| 877 |
|
cachedString = tsdPtr->patterns[i]; |
| 878 |
|
regexpPtr = tsdPtr->regexps[i]; |
| 879 |
|
for (j = i-1; j >= 0; j--) { |
| 880 |
|
tsdPtr->patterns[j+1] = tsdPtr->patterns[j]; |
| 881 |
|
tsdPtr->patLengths[j+1] = tsdPtr->patLengths[j]; |
| 882 |
|
tsdPtr->regexps[j+1] = tsdPtr->regexps[j]; |
| 883 |
|
} |
| 884 |
|
tsdPtr->patterns[0] = cachedString; |
| 885 |
|
tsdPtr->patLengths[0] = length; |
| 886 |
|
tsdPtr->regexps[0] = regexpPtr; |
| 887 |
|
} |
| 888 |
|
return tsdPtr->regexps[0]; |
| 889 |
|
} |
| 890 |
|
} |
| 891 |
|
|
| 892 |
|
/* |
| 893 |
|
* This is a new expression, so compile it and add it to the cache. |
| 894 |
|
*/ |
| 895 |
|
|
| 896 |
|
regexpPtr = (TclRegexp *) ckalloc(sizeof(TclRegexp)); |
| 897 |
|
regexpPtr->objPtr = NULL; |
| 898 |
|
regexpPtr->string = NULL; |
| 899 |
|
regexpPtr->details.rm_extend.rm_so = -1; |
| 900 |
|
regexpPtr->details.rm_extend.rm_eo = -1; |
| 901 |
|
|
| 902 |
|
/* |
| 903 |
|
* Get the up-to-date string representation and map to unicode. |
| 904 |
|
*/ |
| 905 |
|
|
| 906 |
|
Tcl_DStringInit(&stringBuf); |
| 907 |
|
uniString = Tcl_UtfToUniCharDString(string, length, &stringBuf); |
| 908 |
|
numChars = Tcl_DStringLength(&stringBuf) / sizeof(Tcl_UniChar); |
| 909 |
|
|
| 910 |
|
/* |
| 911 |
|
* Compile the string and check for errors. |
| 912 |
|
*/ |
| 913 |
|
|
| 914 |
|
regexpPtr->flags = flags; |
| 915 |
|
status = TclReComp(®expPtr->re, uniString, (size_t) numChars, flags); |
| 916 |
|
Tcl_DStringFree(&stringBuf); |
| 917 |
|
|
| 918 |
|
if (status != REG_OKAY) { |
| 919 |
|
/* |
| 920 |
|
* Clean up and report errors in the interpreter, if possible. |
| 921 |
|
*/ |
| 922 |
|
|
| 923 |
|
ckfree((char *)regexpPtr); |
| 924 |
|
if (interp) { |
| 925 |
|
TclRegError(interp, |
| 926 |
|
"couldn't compile regular expression pattern: ", |
| 927 |
|
status); |
| 928 |
|
} |
| 929 |
|
return NULL; |
| 930 |
|
} |
| 931 |
|
|
| 932 |
|
/* |
| 933 |
|
* Allocate enough space for all of the subexpressions, plus one |
| 934 |
|
* extra for the entire pattern. |
| 935 |
|
*/ |
| 936 |
|
|
| 937 |
|
regexpPtr->matches = (regmatch_t *) ckalloc( |
| 938 |
|
sizeof(regmatch_t) * (regexpPtr->re.re_nsub + 1)); |
| 939 |
|
|
| 940 |
|
/* |
| 941 |
|
* Initialize the refcount to one initially, since it is in the cache. |
| 942 |
|
*/ |
| 943 |
|
|
| 944 |
|
regexpPtr->refCount = 1; |
| 945 |
|
|
| 946 |
|
/* |
| 947 |
|
* Free the last regexp, if necessary, and make room at the head of the |
| 948 |
|
* list for the new regexp. |
| 949 |
|
*/ |
| 950 |
|
|
| 951 |
|
if (tsdPtr->patterns[NUM_REGEXPS-1] != NULL) { |
| 952 |
|
TclRegexp *oldRegexpPtr = tsdPtr->regexps[NUM_REGEXPS-1]; |
| 953 |
|
if (--(oldRegexpPtr->refCount) <= 0) { |
| 954 |
|
FreeRegexp(oldRegexpPtr); |
| 955 |
|
} |
| 956 |
|
ckfree(tsdPtr->patterns[NUM_REGEXPS-1]); |
| 957 |
|
} |
| 958 |
|
for (i = NUM_REGEXPS - 2; i >= 0; i--) { |
| 959 |
|
tsdPtr->patterns[i+1] = tsdPtr->patterns[i]; |
| 960 |
|
tsdPtr->patLengths[i+1] = tsdPtr->patLengths[i]; |
| 961 |
|
tsdPtr->regexps[i+1] = tsdPtr->regexps[i]; |
| 962 |
|
} |
| 963 |
|
tsdPtr->patterns[0] = (char *) ckalloc((unsigned) (length+1)); |
| 964 |
|
strcpy(tsdPtr->patterns[0], string); |
| 965 |
|
tsdPtr->patLengths[0] = length; |
| 966 |
|
tsdPtr->regexps[0] = regexpPtr; |
| 967 |
|
|
| 968 |
|
return regexpPtr; |
| 969 |
|
} |
| 970 |
|
|
| 971 |
|
/* |
| 972 |
|
*---------------------------------------------------------------------- |
| 973 |
|
* |
| 974 |
|
* FreeRegexp -- |
| 975 |
|
* |
| 976 |
|
* Release the storage associated with a TclRegexp. |
| 977 |
|
* |
| 978 |
|
* Results: |
| 979 |
|
* None. |
| 980 |
|
* |
| 981 |
|
* Side effects: |
| 982 |
|
* None. |
| 983 |
|
* |
| 984 |
|
*---------------------------------------------------------------------- |
| 985 |
|
*/ |
| 986 |
|
|
| 987 |
|
static void |
| 988 |
|
FreeRegexp(regexpPtr) |
| 989 |
|
TclRegexp *regexpPtr; /* Compiled regular expression to free. */ |
| 990 |
|
{ |
| 991 |
|
TclReFree(®expPtr->re); |
| 992 |
|
if (regexpPtr->matches) { |
| 993 |
|
ckfree((char *) regexpPtr->matches); |
| 994 |
|
} |
| 995 |
|
ckfree((char *) regexpPtr); |
| 996 |
|
} |
| 997 |
|
|
| 998 |
|
/* |
| 999 |
|
*---------------------------------------------------------------------- |
| 1000 |
|
* |
| 1001 |
|
* FinalizeRegexp -- |
| 1002 |
|
* |
| 1003 |
|
* Release the storage associated with the per-thread regexp |
| 1004 |
|
* cache. |
| 1005 |
|
* |
| 1006 |
|
* Results: |
| 1007 |
|
* None. |
| 1008 |
|
* |
| 1009 |
|
* Side effects: |
| 1010 |
|
* None. |
| 1011 |
|
* |
| 1012 |
|
*---------------------------------------------------------------------- |
| 1013 |
|
*/ |
| 1014 |
|
|
| 1015 |
|
static void |
| 1016 |
|
FinalizeRegexp(clientData) |
| 1017 |
|
ClientData clientData; /* Not used. */ |
| 1018 |
|
{ |
| 1019 |
|
int i; |
| 1020 |
|
TclRegexp *regexpPtr; |
| 1021 |
|
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); |
| 1022 |
|
|
| 1023 |
|
for (i = 0; (i < NUM_REGEXPS) && (tsdPtr->patterns[i] != NULL); i++) { |
| 1024 |
|
regexpPtr = tsdPtr->regexps[i]; |
| 1025 |
|
if (--(regexpPtr->refCount) <= 0) { |
| 1026 |
|
FreeRegexp(regexpPtr); |
| 1027 |
|
} |
| 1028 |
|
ckfree(tsdPtr->patterns[i]); |
| 1029 |
|
} |
| 1030 |
|
} |
| 1031 |
|
|
| 1032 |
|
/* End of tclregexp.c */ |
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