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dashley |
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/* $Header$ */
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dashley |
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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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269 |
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/*
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*---------------------------------------------------------------------------
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272 |
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*
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273 |
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* RegExpExecUniChar --
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274 |
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*
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275 |
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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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277 |
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* found.
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278 |
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*
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279 |
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* Results:
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280 |
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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.
|
282 |
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* Otherwise the return value is 1 if a matching range was found or
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283 |
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* 0 if there was no matching range.
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284 |
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*
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285 |
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* Side effects:
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286 |
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* None.
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287 |
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*
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288 |
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*----------------------------------------------------------------------
|
289 |
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*/
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290 |
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291 |
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static int
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292 |
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RegExpExecUniChar(interp, re, wString, numChars, nmatches, flags)
|
293 |
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Tcl_Interp *interp; /* Interpreter to use for error reporting. */
|
294 |
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Tcl_RegExp re; /* Compiled regular expression; returned by
|
295 |
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* a previous call to Tcl_GetRegExpFromObj */
|
296 |
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CONST Tcl_UniChar *wString; /* String against which to match re. */
|
297 |
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int numChars; /* Length of Tcl_UniChar string (must
|
298 |
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* be >= 0). */
|
299 |
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int nmatches; /* How many subexpression matches (counting
|
300 |
|
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* the whole match as subexpression 0) are
|
301 |
|
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* of interest. -1 means "don't know". */
|
302 |
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int flags; /* Regular expression flags. */
|
303 |
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{
|
304 |
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int status;
|
305 |
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TclRegexp *regexpPtr = (TclRegexp *) re;
|
306 |
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size_t last = regexpPtr->re.re_nsub + 1;
|
307 |
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size_t nm = last;
|
308 |
|
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|
309 |
|
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if (nmatches >= 0 && (size_t) nmatches < nm) {
|
310 |
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nm = (size_t) nmatches;
|
311 |
|
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}
|
312 |
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|
313 |
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status = TclReExec(®expPtr->re, wString, (size_t) numChars,
|
314 |
|
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®expPtr->details, nm, regexpPtr->matches, flags);
|
315 |
|
|
|
316 |
|
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/*
|
317 |
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* Check for errors.
|
318 |
|
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*/
|
319 |
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|
320 |
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if (status != REG_OKAY) {
|
321 |
|
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if (status == REG_NOMATCH) {
|
322 |
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return 0;
|
323 |
|
|
}
|
324 |
|
|
if (interp != NULL) {
|
325 |
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|
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 |
dashley |
64 |
/* End of tclregexp.c */
|