const char pcrs_rcs[] = "$Id: pcrs.c,v 1.22 2006/12/24 17:34:20 fabiankeil Exp $"; /********************************************************************* * * File : $Source: /cvsroot/ijbswa/current/pcrs.c,v $ * * Purpose : pcrs is a supplement to the pcre library by Philip Hazel * and adds Perl-style substitution. That * is, it mimics Perl's 's' operator. See pcrs(3) for details. * * * Copyright : Written and Copyright (C) 2000, 2001 by Andreas S. Oesterhelt * * * This program is free software; you can redistribute it * and/or modify it under the terms of the GNU Lesser * General Public License (LGPL), version 2.1, which should * be included in this distribution (see LICENSE.txt), with * the exception that the permission to replace that license * with the GNU General Public License (GPL) given in section * 3 is restricted to version 2 of the GPL. * * This program is distributed in the hope that it will * be useful, but WITHOUT ANY WARRANTY; without even the * implied warranty of MERCHANTABILITY or FITNESS FOR A * PARTICULAR PURPOSE. See the license for more details. * * The GNU Lesser General Public License should be included * with this file. If not, you can view it at * http://www.gnu.org/licenses/lgpl.html * or write to the Free Software Foundation, Inc., 59 * Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * Revisions : * $Log: pcrs.c,v $ * Revision 1.22 2006/12/24 17:34:20 fabiankeil * Add pcrs_strerror() message for PCRE_ERROR_MATCHLIMIT * and give a hint why an error code might be unknown. * * Catch NULL subjects early in pcrs_execute(). * * Revision 1.21 2006/07/18 14:48:47 david__schmidt * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch) * with what was really the latest development (the v_3_0_branch branch) * * Revision 1.19.2.4 2005/05/07 21:50:55 david__schmidt * A few memory leaks plugged (mostly on error paths) * * Revision 1.19.2.3 2003/12/04 12:32:45 oes * Append a trailing nullbyte to result to facilitate string processing * * Revision 1.19.2.2 2002/10/08 16:22:28 oes * Bugfix: Need to check validity of backreferences explicitly, * because when max_matches are reached and matches is expanded, * realloc() does not zero the memory. Fixes Bug # 606227 * * Revision 1.19.2.1 2002/08/10 11:23:40 oes * Include prce.h via project.h, where the appropriate * source will have been selected * * Revision 1.19 2002/03/08 14:47:48 oes * Cosmetics * * Revision 1.18 2002/03/08 14:17:14 oes * Fixing -Wconversion warnings * * Revision 1.17 2002/03/08 13:45:48 oes * Hiding internal functions * * Revision 1.16 2001/11/30 21:32:14 jongfoster * Fixing signed/unsigned comparison (Andreas please check this!) * One tab->space * * Revision 1.15 2001/09/20 16:11:06 steudten * * Add casting for some string functions. * * Revision 1.14 2001/09/09 21:41:57 oes * Fixing yet another silly bug * * Revision 1.13 2001/09/06 14:05:59 oes * Fixed silly bug * * Revision 1.12 2001/08/18 11:35:00 oes * - Introduced pcrs_strerror() * - made some NULL arguments non-fatal * - added support for \n \r \e \b \t \f \a \0 in substitute * - made quoting adhere to standard rules * - added warning for bad backrefs * - added pcrs_execute_list() * - fixed comments * - bugfix & cosmetics * * Revision 1.11 2001/08/15 15:32:03 oes * - Added support for Perl's special variables $+, $' and $` * - Improved the substitute parser * - Replaced the hard limit for the maximum number of matches * by dynamic reallocation * * Revision 1.10 2001/08/05 13:13:11 jongfoster * Making parameters "const" where possible. * * Revision 1.9 2001/07/18 17:27:00 oes * Changed interface; Cosmetics * * Revision 1.8 2001/06/29 21:45:41 oes * Indentation, CRLF->LF, Tab-> Space * * Revision 1.7 2001/06/29 13:33:04 oes * - Cleaned up, renamed and reordered functions, * improved comments * - Removed my_strsep * - Replaced globalflag with a general flags int * that holds PCRS_GLOBAL, PCRS_SUCCESS, and PCRS_TRIVIAL * - Introduced trivial option that will prevent pcrs * from honouring backreferences in the substitute, * which is useful for large substitutes that are * red in from somewhere and saves the pain of escaping * the backrefs * - Introduced convenience function pcrs_free_joblist() * - Split pcrs_make_job() into pcrs_compile(), which still * takes a complete s/// comand as argument and parses it, * and a new function pcrs_make_job, which takes the * three separate components. This should make for a * much friendlier frontend. * - Removed create_pcrs_job() which was useless * - Fixed a bug in pcrs_execute * - Success flag is now handled by pcrs instead of user * * Revision 1.6 2001/06/03 19:12:45 oes * added FIXME * * Revision 1.5 2001/05/29 09:50:24 jongfoster * (Fixed one int -> size_t) * * Revision 1.4 2001/05/25 14:12:40 oes * Fixed bug: Empty substitutes now detected * * Revision 1.3 2001/05/25 11:03:55 oes * Added sanity check for NULL jobs to pcrs_exec_substitution * * Revision 1.2 2001/05/22 18:46:04 oes * * Added support for PCRE_UNGREEDY behaviour to pcrs, * which is selected by the (nonstandard and therefore * capital) letter 'U' in the option string. * It causes the quantifiers to be ungreedy by default. * Appending a ? turns back to greedy (!). * * Revision 1.1.1.1 2001/05/15 13:59:02 oes * Initial import of version 2.9.3 source tree * * *********************************************************************/ /* * Include project.h just so that the right pcre.h gets * included from there */ #include "project.h" #include #include #include "pcrs.h" const char pcrs_h_rcs[] = PCRS_H_VERSION; /* * Internal prototypes */ static int pcrs_parse_perl_options(const char *optstring, int *flags); static pcrs_substitute *pcrs_compile_replacement(const char *replacement, int trivialflag, int capturecount, int *errptr); /********************************************************************* * * Function : pcrs_strerror * * Description : Return a string describing a given error code. * * Parameters : * 1 : error = the error code * * Returns : char * to the descriptive string * *********************************************************************/ const char *pcrs_strerror(const int error) { if (error < 0) { switch (error) { /* Passed-through PCRE error: */ case PCRE_ERROR_NOMEMORY: return "(pcre:) No memory"; /* Shouldn't happen unless PCRE or PCRS bug, or user messed with compiled job: */ case PCRE_ERROR_NULL: return "(pcre:) NULL code or subject or ovector"; case PCRE_ERROR_BADOPTION: return "(pcre:) Unrecognized option bit"; case PCRE_ERROR_BADMAGIC: return "(pcre:) Bad magic number in code"; case PCRE_ERROR_UNKNOWN_NODE: return "(pcre:) Bad node in pattern"; /* Can't happen / not passed: */ case PCRE_ERROR_NOSUBSTRING: return "(pcre:) Fire in power supply"; case PCRE_ERROR_NOMATCH: return "(pcre:) Water in power supply"; #ifdef PCRE_ERROR_MATCHLIMIT /* * Only reported by PCRE versions newer than our own. */ case PCRE_ERROR_MATCHLIMIT: return "(pcre:) Match limit reached"; #endif /* def PCRE_ERROR_MATCHLIMIT */ /* PCRS errors: */ case PCRS_ERR_NOMEM: return "(pcrs:) No memory"; case PCRS_ERR_CMDSYNTAX: return "(pcrs:) Syntax error while parsing command"; case PCRS_ERR_STUDY: return "(pcrs:) PCRE error while studying the pattern"; case PCRS_ERR_BADJOB: return "(pcrs:) Bad job - NULL job, pattern or substitute"; case PCRS_WARN_BADREF: return "(pcrs:) Backreference out of range"; /* * XXX: With the exception of PCRE_ERROR_MATCHLIMIT we * only catch PCRE errors that can happen with our internal * version. If Privoxy is linked against a newer * PCRE version all bets are off ... */ default: return "Unknown error. Privoxy out of sync with PCRE?"; } } /* error >= 0: No error */ return "(pcrs:) Everything's just fine. Thanks for asking."; } /********************************************************************* * * Function : pcrs_parse_perl_options * * Description : This function parses a string containing the options to * Perl's s/// operator. It returns an integer that is the * pcre equivalent of the symbolic optstring. * Since pcre doesn't know about Perl's 'g' (global) or pcrs', * 'T' (trivial) options but pcrs needs them, the corresponding * flags are set if 'g'or 'T' is encountered. * Note: The 'T' and 'U' options do not conform to Perl. * * Parameters : * 1 : optstring = string with options in perl syntax * 2 : flags = see description * * Returns : option integer suitable for pcre * *********************************************************************/ static int pcrs_parse_perl_options(const char *optstring, int *flags) { size_t i; int rc = 0; *flags = 0; if (NULL == optstring) return 0; for (i = 0; i < strlen(optstring); i++) { switch(optstring[i]) { case 'e': break; /* ToDo ;-) */ case 'g': *flags |= PCRS_GLOBAL; break; case 'i': rc |= PCRE_CASELESS; break; case 'm': rc |= PCRE_MULTILINE; break; case 'o': break; case 's': rc |= PCRE_DOTALL; break; case 'x': rc |= PCRE_EXTENDED; break; case 'U': rc |= PCRE_UNGREEDY; break; case 'T': *flags |= PCRS_TRIVIAL; break; default: break; } } return rc; } /********************************************************************* * * Function : pcrs_compile_replacement * * Description : This function takes a Perl-style replacement (2nd argument * to the s/// operator and returns a compiled pcrs_substitute, * or NULL if memory allocation for the substitute structure * fails. * * Parameters : * 1 : replacement = replacement part of s/// operator * in perl syntax * 2 : trivialflag = Flag that causes backreferences to be * ignored. * 3 : capturecount = Number of capturing subpatterns in * the pattern. Needed for $+ handling. * 4 : errptr = pointer to an integer in which error * conditions can be returned. * * Returns : pcrs_substitute data structure, or NULL if an * error is encountered. In that case, *errptr has * the reason. * *********************************************************************/ static pcrs_substitute *pcrs_compile_replacement(const char *replacement, int trivialflag, int capturecount, int *errptr) { int i, k, l, quoted; size_t length; char *text; pcrs_substitute *r; i = k = l = quoted = 0; /* * Sanity check */ if (NULL == replacement) { replacement = ""; } /* * Get memory or fail */ if (NULL == (r = (pcrs_substitute *)malloc(sizeof(pcrs_substitute)))) { *errptr = PCRS_ERR_NOMEM; return NULL; } memset(r, '\0', sizeof(pcrs_substitute)); length = strlen(replacement); if (NULL == (text = (char *)malloc(length + 1))) { free(r); *errptr = PCRS_ERR_NOMEM; return NULL; } memset(text, '\0', length + 1); /* * In trivial mode, just copy the substitute text */ if (trivialflag) { text = strncpy(text, replacement, length + 1); k = (int)length; } /* * Else, parse, cut out and record all backreferences */ else { while (i < (int)length) { /* Quoting */ if (replacement[i] == '\\') { if (quoted) { text[k++] = replacement[i++]; quoted = 0; } else { if (replacement[i+1] && strchr("tnrfae0", replacement[i+1])) { switch (replacement[++i]) { case 't': text[k++] = '\t'; break; case 'n': text[k++] = '\n'; break; case 'r': text[k++] = '\r'; break; case 'f': text[k++] = '\f'; break; case 'a': text[k++] = 7; break; case 'e': text[k++] = 27; break; case '0': text[k++] = '\0'; break; } i++; } else { quoted = 1; i++; } } continue; } /* Backreferences */ if (replacement[i] == '$' && !quoted && i < (int)(length - 1)) { char *symbol, symbols[] = "'`+&"; r->block_length[l] = (size_t)(k - r->block_offset[l]); /* Numerical backreferences */ if (isdigit((int)replacement[i + 1])) { while (i < (int)length && isdigit((int)replacement[++i])) { r->backref[l] = r->backref[l] * 10 + replacement[i] - 48; } if (r->backref[l] > capturecount) { *errptr = PCRS_WARN_BADREF; } } /* Symbolic backreferences: */ else if (NULL != (symbol = strchr(symbols, replacement[i + 1]))) { if (symbol - symbols == 2) /* $+ */ { r->backref[l] = capturecount; } else if (symbol - symbols == 3) /* $& */ { r->backref[l] = 0; } else /* $' or $` */ { r->backref[l] = PCRS_MAX_SUBMATCHES + 1 - (symbol - symbols); } i += 2; } /* Invalid backref -> plain '$' */ else { goto plainchar; } /* Valid and in range? -> record */ if (r->backref[l] < PCRS_MAX_SUBMATCHES + 2) { r->backref_count[r->backref[l]] += 1; r->block_offset[++l] = k; } else { *errptr = PCRS_WARN_BADREF; } continue; } plainchar: /* Plain chars are copied */ text[k++] = replacement[i++]; quoted = 0; } } /* -END- if (!trivialflag) */ /* * Finish & return */ r->text = text; r->backrefs = l; r->block_length[l] = (size_t)(k - r->block_offset[l]); return r; } /********************************************************************* * * Function : pcrs_free_job * * Description : Frees the memory used by a pcrs_job struct and its * dependant structures. * * Parameters : * 1 : job = pointer to the pcrs_job structure to be freed * * Returns : a pointer to the next job, if there was any, or * NULL otherwise. * *********************************************************************/ pcrs_job *pcrs_free_job(pcrs_job *job) { pcrs_job *next; if (job == NULL) { return NULL; } else { next = job->next; if (job->pattern != NULL) free(job->pattern); if (job->hints != NULL) free(job->hints); if (job->substitute != NULL) { if (job->substitute->text != NULL) free(job->substitute->text); free(job->substitute); } free(job); } return next; } /********************************************************************* * * Function : pcrs_free_joblist * * Description : Iterates through a chained list of pcrs_job's and * frees them using pcrs_free_job. * * Parameters : * 1 : joblist = pointer to the first pcrs_job structure to * be freed * * Returns : N/A * *********************************************************************/ void pcrs_free_joblist(pcrs_job *joblist) { while ( NULL != (joblist = pcrs_free_job(joblist)) ) {}; return; } /********************************************************************* * * Function : pcrs_compile_command * * Description : Parses a string with a Perl-style s/// command, * calls pcrs_compile, and returns a corresponding * pcrs_job, or NULL if parsing or compiling the job * fails. * * Parameters : * 1 : command = string with perl-style s/// command * 2 : errptr = pointer to an integer in which error * conditions can be returned. * * Returns : a corresponding pcrs_job data structure, or NULL * if an error was encountered. In that case, *errptr * has the reason. * *********************************************************************/ pcrs_job *pcrs_compile_command(const char *command, int *errptr) { int i, k, l, quoted = FALSE; size_t limit; char delimiter; char *tokens[4]; pcrs_job *newjob; i = k = l = 0; /* * Tokenize the perl command */ limit = strlen(command); if (limit < 4) { *errptr = PCRS_ERR_CMDSYNTAX; return NULL; } else { delimiter = command[1]; } tokens[l] = (char *) malloc(limit + 1); for (i = 0; i <= (int)limit; i++) { if (command[i] == delimiter && !quoted) { if (l == 3) { l = -1; break; } tokens[0][k++] = '\0'; tokens[++l] = tokens[0] + k; continue; } else if (command[i] == '\\' && !quoted) { quoted = TRUE; if (command[i+1] == delimiter) continue; } else { quoted = FALSE; } tokens[0][k++] = command[i]; } /* * Syntax error ? */ if (l != 3) { *errptr = PCRS_ERR_CMDSYNTAX; free(tokens[0]); return NULL; } newjob = pcrs_compile(tokens[1], tokens[2], tokens[3], errptr); free(tokens[0]); return newjob; } /********************************************************************* * * Function : pcrs_compile * * Description : Takes the three arguments to a perl s/// command * and compiles a pcrs_job structure from them. * * Parameters : * 1 : pattern = string with perl-style pattern * 2 : substitute = string with perl-style substitute * 3 : options = string with perl-style options * 4 : errptr = pointer to an integer in which error * conditions can be returned. * * Returns : a corresponding pcrs_job data structure, or NULL * if an error was encountered. In that case, *errptr * has the reason. * *********************************************************************/ pcrs_job *pcrs_compile(const char *pattern, const char *substitute, const char *options, int *errptr) { pcrs_job *newjob; int flags; int capturecount; const char *error; *errptr = 0; /* * Handle NULL arguments */ if (pattern == NULL) pattern = ""; if (substitute == NULL) substitute = ""; /* * Get and init memory */ if (NULL == (newjob = (pcrs_job *)malloc(sizeof(pcrs_job)))) { *errptr = PCRS_ERR_NOMEM; return NULL; } memset(newjob, '\0', sizeof(pcrs_job)); /* * Evaluate the options */ newjob->options = pcrs_parse_perl_options(options, &flags); newjob->flags = flags; /* * Compile the pattern */ newjob->pattern = pcre_compile(pattern, newjob->options, &error, errptr, NULL); if (newjob->pattern == NULL) { pcrs_free_job(newjob); return NULL; } /* * Generate hints. This has little overhead, since the * hints will be NULL for a boring pattern anyway. */ newjob->hints = pcre_study(newjob->pattern, 0, &error); if (error != NULL) { *errptr = PCRS_ERR_STUDY; pcrs_free_job(newjob); return NULL; } /* * Determine the number of capturing subpatterns. * This is needed for handling $+ in the substitute. */ if (0 > (*errptr = pcre_fullinfo(newjob->pattern, newjob->hints, PCRE_INFO_CAPTURECOUNT, &capturecount))) { pcrs_free_job(newjob); return NULL; } /* * Compile the substitute */ if (NULL == (newjob->substitute = pcrs_compile_replacement(substitute, newjob->flags & PCRS_TRIVIAL, capturecount, errptr))) { pcrs_free_job(newjob); return NULL; } return newjob; } /********************************************************************* * * Function : pcrs_execute_list * * Description : This is a multiple job wrapper for pcrs_execute(). * Apply the regular substitutions defined by the jobs in * the joblist to the subject. * The subject itself is left untouched, memory for the result * is malloc()ed and it is the caller's responsibility to free * the result when it's no longer needed. * * Note: For convenient string handling, a null byte is * appended to the result. It does not count towards the * result_length, though. * * * Parameters : * 1 : joblist = the chained list of pcrs_jobs to be executed * 2 : subject = the subject string * 3 : subject_length = the subject's length * 4 : result = char** for returning the result * 5 : result_length = size_t* for returning the result's length * * Returns : On success, the number of substitutions that were made. * May be > 1 if job->flags contained PCRS_GLOBAL * On failure, the (negative) pcre error code describing the * failure, which may be translated to text using pcrs_strerror(). * *********************************************************************/ int pcrs_execute_list(pcrs_job *joblist, char *subject, size_t subject_length, char **result, size_t *result_length) { pcrs_job *job; char *old, *new = NULL; int hits, total_hits; old = subject; *result_length = subject_length; hits = total_hits = 0; for (job = joblist; job != NULL; job = job->next) { hits = pcrs_execute(job, old, *result_length, &new, result_length); if (old != subject) free(old); if (hits < 0) { return(hits); } else { total_hits += hits; old = new; } } *result = new; return(total_hits); } /********************************************************************* * * Function : pcrs_execute * * Description : Apply the regular substitution defined by the job to the * subject. * The subject itself is left untouched, memory for the result * is malloc()ed and it is the caller's responsibility to free * the result when it's no longer needed. * * Note: For convenient string handling, a null byte is * appended to the result. It does not count towards the * result_length, though. * * Parameters : * 1 : job = the pcrs_job to be executed * 2 : subject = the subject (== original) string * 3 : subject_length = the subject's length * 4 : result = char** for returning the result * 5 : result_length = size_t* for returning the result's length * * Returns : On success, the number of substitutions that were made. * May be > 1 if job->flags contained PCRS_GLOBAL * On failure, the (negative) pcre error code describing the * failure, which may be translated to text using pcrs_strerror(). * *********************************************************************/ int pcrs_execute(pcrs_job *job, char *subject, size_t subject_length, char **result, size_t *result_length) { int offsets[3 * PCRS_MAX_SUBMATCHES], offset, i, k, matches_found, submatches, max_matches = PCRS_MAX_MATCH_INIT; size_t newsize; pcrs_match *matches, *dummy; char *result_offset; offset = i = k = 0; /* * Sanity check & memory allocation */ if (job == NULL || job->pattern == NULL || job->substitute == NULL || NULL == subject) { *result = NULL; return(PCRS_ERR_BADJOB); } if (NULL == (matches = (pcrs_match *)malloc((size_t)max_matches * sizeof(pcrs_match)))) { *result = NULL; return(PCRS_ERR_NOMEM); } memset(matches, '\0', (size_t)max_matches * sizeof(pcrs_match)); /* * Find the pattern and calculate the space * requirements for the result */ newsize = subject_length; while ((submatches = pcre_exec(job->pattern, job->hints, subject, (int)subject_length, offset, 0, offsets, 3 * PCRS_MAX_SUBMATCHES)) > 0) { job->flags |= PCRS_SUCCESS; matches[i].submatches = submatches; for (k = 0; k < submatches; k++) { matches[i].submatch_offset[k] = offsets[2 * k]; /* Note: Non-found optional submatches have length -1-(-1)==0 */ matches[i].submatch_length[k] = (size_t)(offsets[2 * k + 1] - offsets[2 * k]); /* reserve mem for each submatch as often as it is ref'd */ newsize += matches[i].submatch_length[k] * (size_t)job->substitute->backref_count[k]; } /* plus replacement text size minus match text size */ newsize += strlen(job->substitute->text) - matches[i].submatch_length[0]; /* chunk before match */ matches[i].submatch_offset[PCRS_MAX_SUBMATCHES] = 0; matches[i].submatch_length[PCRS_MAX_SUBMATCHES] = (size_t)offsets[0]; newsize += (size_t)offsets[0] * (size_t)job->substitute->backref_count[PCRS_MAX_SUBMATCHES]; /* chunk after match */ matches[i].submatch_offset[PCRS_MAX_SUBMATCHES + 1] = offsets[1]; matches[i].submatch_length[PCRS_MAX_SUBMATCHES + 1] = subject_length - (size_t)offsets[1] - 1; newsize += (subject_length - (size_t)offsets[1]) * (size_t)job->substitute->backref_count[PCRS_MAX_SUBMATCHES + 1]; /* Storage for matches exhausted? -> Extend! */ if (++i >= max_matches) { max_matches = (int)(max_matches * PCRS_MAX_MATCH_GROW); if (NULL == (dummy = (pcrs_match *)realloc(matches, (size_t)max_matches * sizeof(pcrs_match)))) { free(matches); *result = NULL; return(PCRS_ERR_NOMEM); } matches = dummy; } /* Non-global search or limit reached? */ if (!(job->flags & PCRS_GLOBAL)) break; /* Don't loop on empty matches */ if (offsets[1] == offset) if ((size_t)offset < subject_length) offset++; else break; /* Go find the next one */ else offset = offsets[1]; } /* Pass pcre error through if (bad) failiure */ if (submatches < PCRE_ERROR_NOMATCH) { free(matches); return submatches; } matches_found = i; /* * Get memory for the result (must be freed by caller!) * and append terminating null byte. */ if ((*result = (char *)malloc(newsize + 1)) == NULL) { free(matches); return PCRS_ERR_NOMEM; } else { (*result)[newsize] = '\0'; } /* * Replace */ offset = 0; result_offset = *result; for (i = 0; i < matches_found; i++) { /* copy the chunk preceding the match */ memcpy(result_offset, subject + offset, (size_t)(matches[i].submatch_offset[0] - offset)); result_offset += matches[i].submatch_offset[0] - offset; /* For every segment of the substitute.. */ for (k = 0; k <= job->substitute->backrefs; k++) { /* ...copy its text.. */ memcpy(result_offset, job->substitute->text + job->substitute->block_offset[k], job->substitute->block_length[k]); result_offset += job->substitute->block_length[k]; /* ..plus, if it's not the last chunk, i.e.: There *is* a backref.. */ if (k != job->substitute->backrefs /* ..in legal range.. */ && job->substitute->backref[k] < PCRS_MAX_SUBMATCHES + 2 /* ..and referencing a real submatch.. */ && job->substitute->backref[k] < matches[i].submatches /* ..that is nonempty.. */ && matches[i].submatch_length[job->substitute->backref[k]] > 0) { /* ..copy the submatch that is ref'd. */ memcpy( result_offset, subject + matches[i].submatch_offset[job->substitute->backref[k]], matches[i].submatch_length[job->substitute->backref[k]] ); result_offset += matches[i].submatch_length[job->substitute->backref[k]]; } } offset = matches[i].submatch_offset[0] + (int)matches[i].submatch_length[0]; } /* Copy the rest. */ memcpy(result_offset, subject + offset, subject_length - (size_t)offset); *result_length = newsize; free(matches); return matches_found; } /* Local Variables: tab-width: 3 end: */