/[pcre]/code/trunk/pcreposix.c
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revision 25 by nigel, Sat Feb 24 21:38:45 2007 UTC revision 41 by nigel, Sat Feb 24 21:39:17 2007 UTC
# Line 12  functions. Line 12  functions.
12    
13  Written by: Philip Hazel <ph10@cam.ac.uk>  Written by: Philip Hazel <ph10@cam.ac.uk>
14    
15             Copyright (c) 1998 University of Cambridge             Copyright (c) 1997-1999 University of Cambridge
16    
17  -----------------------------------------------------------------------------  -----------------------------------------------------------------------------
18  Permission is granted to anyone to use this software for any purpose on any  Permission is granted to anyone to use this software for any purpose on any
# Line 28  restrictions: Line 28  restrictions:
28    
29  3. Altered versions must be plainly marked as such, and must not be  3. Altered versions must be plainly marked as such, and must not be
30     misrepresented as being the original software.     misrepresented as being the original software.
31    
32    4. If PCRE is embedded in any software that is released under the GNU
33       General Purpose Licence (GPL), then the terms of that licence shall
34       supersede any condition above with which it is incompatible.
35  -----------------------------------------------------------------------------  -----------------------------------------------------------------------------
36  */  */
37    
# Line 207  return 0; Line 211  return 0;
211  *              Match a regular expression        *  *              Match a regular expression        *
212  *************************************************/  *************************************************/
213    
214    /* Unfortunately, PCRE requires 3 ints of working space for each captured
215    substring, so we have to get and release working store instead of just using
216    the POSIX structures as was done in earlier releases when PCRE needed only 2
217    ints. */
218    
219  int  int
220  regexec(regex_t *preg, const char *string, size_t nmatch,  regexec(regex_t *preg, const char *string, size_t nmatch,
221    regmatch_t pmatch[], int eflags)    regmatch_t pmatch[], int eflags)
222  {  {
223  int rc;  int rc;
224  int options = 0;  int options = 0;
225    int *ovector = NULL;
226    
227  if ((eflags & REG_NOTBOL) != 0) options |= PCRE_NOTBOL;  if ((eflags & REG_NOTBOL) != 0) options |= PCRE_NOTBOL;
228  if ((eflags & REG_NOTEOL) != 0) options |= PCRE_NOTEOL;  if ((eflags & REG_NOTEOL) != 0) options |= PCRE_NOTEOL;
229    
230  preg->re_erroffset = (size_t)(-1);   /* Only has meaning after compile */  preg->re_erroffset = (size_t)(-1);   /* Only has meaning after compile */
231    
232  rc = pcre_exec(preg->re_pcre, NULL, string, (int)strlen(string), options,  if (nmatch > 0)
233    (int *)pmatch, nmatch * 2);    {
234      ovector = malloc(sizeof(int) * nmatch * 3);
235      if (ovector == NULL) return REG_ESPACE;
236      }
237    
238    rc = pcre_exec(preg->re_pcre, NULL, string, (int)strlen(string), 0, options,
239      ovector, nmatch * 3);
240    
241  if (rc == 0) return 0;    /* All pmatch were filled in */  if (rc == 0) rc = nmatch;    /* All captured slots were filled in */
242    
243  if (rc > 0)  if (rc >= 0)
244    {    {
245    size_t i;    size_t i;
246    for (i = rc; i < nmatch; i++) pmatch[i].rm_so = pmatch[i].rm_eo = -1;    for (i = 0; i < rc; i++)
247        {
248        pmatch[i].rm_so = ovector[i*2];
249        pmatch[i].rm_eo = ovector[i*2+1];
250        }
251      if (ovector != NULL) free(ovector);
252      for (; i < nmatch; i++) pmatch[i].rm_so = pmatch[i].rm_eo = -1;
253    return 0;    return 0;
254    }    }
255    
256  else switch(rc)  else
257    {    {
258    case PCRE_ERROR_NOMATCH: return REG_NOMATCH;    if (ovector != NULL) free(ovector);
259    case PCRE_ERROR_NULL: return REG_INVARG;    switch(rc)
260    case PCRE_ERROR_BADOPTION: return REG_INVARG;      {
261    case PCRE_ERROR_BADMAGIC: return REG_INVARG;      case PCRE_ERROR_NOMATCH: return REG_NOMATCH;
262    case PCRE_ERROR_UNKNOWN_NODE: return REG_ASSERT;      case PCRE_ERROR_NULL: return REG_INVARG;
263    case PCRE_ERROR_NOMEMORY: return REG_ESPACE;      case PCRE_ERROR_BADOPTION: return REG_INVARG;
264    default: return REG_ASSERT;      case PCRE_ERROR_BADMAGIC: return REG_INVARG;
265        case PCRE_ERROR_UNKNOWN_NODE: return REG_ASSERT;
266        case PCRE_ERROR_NOMEMORY: return REG_ESPACE;
267        default: return REG_ASSERT;
268        }
269    }    }
270  }  }
271    

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