/[pcre]/code/trunk/pcreposix.c
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revision 25 by nigel, Sat Feb 24 21:38:45 2007 UTC revision 49 by nigel, Sat Feb 24 21:39:33 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) 1997-2000 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 42  restrictions: Line 46  restrictions:
46  static const char *estring[] = {  static const char *estring[] = {
47    ERR1,  ERR2,  ERR3,  ERR4,  ERR5,  ERR6,  ERR7,  ERR8,  ERR9,  ERR10,    ERR1,  ERR2,  ERR3,  ERR4,  ERR5,  ERR6,  ERR7,  ERR8,  ERR9,  ERR10,
48    ERR11, ERR12, ERR13, ERR14, ERR15, ERR16, ERR17, ERR18, ERR19, ERR20,    ERR11, ERR12, ERR13, ERR14, ERR15, ERR16, ERR17, ERR18, ERR19, ERR20,
49    ERR21, ERR22, ERR23, ERR24, ERR25 };    ERR21, ERR22, ERR23, ERR24, ERR25, ERR26, ERR27, ERR29, ERR29, ERR30,
50      ERR31 };
51    
52  static int eint[] = {  static int eint[] = {
53    REG_EESCAPE, /* "\\ at end of pattern" */    REG_EESCAPE, /* "\\ at end of pattern" */
# Line 72  static int eint[] = { Line 77  static int eint[] = {
77    REG_BADPAT,  /* "lookbehind assertion is not fixed length" */    REG_BADPAT,  /* "lookbehind assertion is not fixed length" */
78    REG_BADPAT,  /* "malformed number after (?(" */    REG_BADPAT,  /* "malformed number after (?(" */
79    REG_BADPAT,  /* "conditional group containe more than two branches" */    REG_BADPAT,  /* "conditional group containe more than two branches" */
80    REG_BADPAT   /* "assertion expected after (?(" */    REG_BADPAT,  /* "assertion expected after (?(" */
81      REG_BADPAT,  /* "(?p must be followed by )" */
82      REG_ECTYPE,  /* "unknown POSIX class name" */
83      REG_BADPAT,  /* "POSIX collating elements are not supported" */
84      REG_INVARG,  /* "this version of PCRE is not compiled with PCRE_UTF8 support" */
85      REG_BADPAT,  /* "characters with values > 255 are not yet supported in classes" */
86      REG_BADPAT   /* "character value in \x{...} sequence is too large" */
87  };  };
88    
89  /* Table of texts corresponding to POSIX error codes */  /* Table of texts corresponding to POSIX error codes */
# Line 207  return 0; Line 218  return 0;
218  *              Match a regular expression        *  *              Match a regular expression        *
219  *************************************************/  *************************************************/
220    
221    /* Unfortunately, PCRE requires 3 ints of working space for each captured
222    substring, so we have to get and release working store instead of just using
223    the POSIX structures as was done in earlier releases when PCRE needed only 2
224    ints. */
225    
226  int  int
227  regexec(regex_t *preg, const char *string, size_t nmatch,  regexec(regex_t *preg, const char *string, size_t nmatch,
228    regmatch_t pmatch[], int eflags)    regmatch_t pmatch[], int eflags)
229  {  {
230  int rc;  int rc;
231  int options = 0;  int options = 0;
232    int *ovector = NULL;
233    
234  if ((eflags & REG_NOTBOL) != 0) options |= PCRE_NOTBOL;  if ((eflags & REG_NOTBOL) != 0) options |= PCRE_NOTBOL;
235  if ((eflags & REG_NOTEOL) != 0) options |= PCRE_NOTEOL;  if ((eflags & REG_NOTEOL) != 0) options |= PCRE_NOTEOL;
236    
237  preg->re_erroffset = (size_t)(-1);   /* Only has meaning after compile */  preg->re_erroffset = (size_t)(-1);   /* Only has meaning after compile */
238    
239  rc = pcre_exec(preg->re_pcre, NULL, string, (int)strlen(string), options,  if (nmatch > 0)
240    (int *)pmatch, nmatch * 2);    {
241      ovector = (int *)malloc(sizeof(int) * nmatch * 3);
242      if (ovector == NULL) return REG_ESPACE;
243      }
244    
245    rc = pcre_exec(preg->re_pcre, NULL, string, (int)strlen(string), 0, options,
246      ovector, nmatch * 3);
247    
248  if (rc == 0) return 0;    /* All pmatch were filled in */  if (rc == 0) rc = nmatch;    /* All captured slots were filled in */
249    
250  if (rc > 0)  if (rc >= 0)
251    {    {
252    size_t i;    size_t i;
253    for (i = rc; i < nmatch; i++) pmatch[i].rm_so = pmatch[i].rm_eo = -1;    for (i = 0; i < rc; i++)
254        {
255        pmatch[i].rm_so = ovector[i*2];
256        pmatch[i].rm_eo = ovector[i*2+1];
257        }
258      if (ovector != NULL) free(ovector);
259      for (; i < nmatch; i++) pmatch[i].rm_so = pmatch[i].rm_eo = -1;
260    return 0;    return 0;
261    }    }
262    
263  else switch(rc)  else
264    {    {
265    case PCRE_ERROR_NOMATCH: return REG_NOMATCH;    if (ovector != NULL) free(ovector);
266    case PCRE_ERROR_NULL: return REG_INVARG;    switch(rc)
267    case PCRE_ERROR_BADOPTION: return REG_INVARG;      {
268    case PCRE_ERROR_BADMAGIC: return REG_INVARG;      case PCRE_ERROR_NOMATCH: return REG_NOMATCH;
269    case PCRE_ERROR_UNKNOWN_NODE: return REG_ASSERT;      case PCRE_ERROR_NULL: return REG_INVARG;
270    case PCRE_ERROR_NOMEMORY: return REG_ESPACE;      case PCRE_ERROR_BADOPTION: return REG_INVARG;
271    default: return REG_ASSERT;      case PCRE_ERROR_BADMAGIC: return REG_INVARG;
272        case PCRE_ERROR_UNKNOWN_NODE: return REG_ASSERT;
273        case PCRE_ERROR_NOMEMORY: return REG_ESPACE;
274        default: return REG_ASSERT;
275        }
276    }    }
277  }  }
278    

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