/[pcre]/code/trunk/pcre.c
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Diff of /code/trunk/pcre.c

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revision 46 by nigel, Sat Feb 24 21:39:21 2007 UTC revision 47 by nigel, Sat Feb 24 21:39:29 2007 UTC
# Line 145  static BOOL Line 145  static BOOL
145    compile_regex(int, int, int *, uschar **, const uschar **, const char **,    compile_regex(int, int, int *, uschar **, const uschar **, const char **,
146      BOOL, int, int *, int *, compile_data *);      BOOL, int, int *, int *, compile_data *);
147    
148    /* Structure for building a chain of data that actually lives on the
149    stack, for holding the values of the subject pointer at the start of each
150    subpattern, so as to detect when an empty string has been matched by a
151    subpattern - to break infinite loops. */
152    
153    typedef struct eptrblock {
154      struct eptrblock *prev;
155      const uschar *saved_eptr;
156    } eptrblock;
157    
158    /* Flag bits for the match() function */
159    
160    #define match_condassert   0x01    /* Called to check a condition assertion */
161    #define match_isgroup      0x02    /* Set if start of bracketed group */
162    
163    
164    
165  /*************************************************  /*************************************************
# Line 855  for (;; ptr++) Line 870  for (;; ptr++)
870      if ((cd->ctypes[c] & ctype_space) != 0) continue;      if ((cd->ctypes[c] & ctype_space) != 0) continue;
871      if (c == '#')      if (c == '#')
872        {        {
873        while ((c = *(++ptr)) != 0 && c != '\n');        /* The space before the ; is to avoid a warning on a silly compiler
874          on the Macintosh. */
875          while ((c = *(++ptr)) != 0 && c != '\n') ;
876        continue;        continue;
877        }        }
878      }      }
# Line 1795  for (;; ptr++) Line 1812  for (;; ptr++)
1812          if ((cd->ctypes[c] & ctype_space) != 0) continue;          if ((cd->ctypes[c] & ctype_space) != 0) continue;
1813          if (c == '#')          if (c == '#')
1814            {            {
1815            while ((c = *(++ptr)) != 0 && c != '\n');            /* The space before the ; is to avoid a warning on a silly compiler
1816              on the Macintosh. */
1817              while ((c = *(++ptr)) != 0 && c != '\n') ;
1818            if (c == 0) break;            if (c == 0) break;
1819            continue;            continue;
1820            }            }
# Line 2313  while ((c = *(++ptr)) != 0) Line 2332  while ((c = *(++ptr)) != 0)
2332      if ((compile_block.ctypes[c] & ctype_space) != 0) continue;      if ((compile_block.ctypes[c] & ctype_space) != 0) continue;
2333      if (c == '#')      if (c == '#')
2334        {        {
2335        while ((c = *(++ptr)) != 0 && c != '\n');        /* The space before the ; is to avoid a warning on a silly compiler
2336          on the Macintosh. */
2337          while ((c = *(++ptr)) != 0 && c != '\n') ;
2338        continue;        continue;
2339        }        }
2340      }      }
# Line 2523  while ((c = *(++ptr)) != 0) Line 2544  while ((c = *(++ptr)) != 0)
2544          else   /* An assertion must follow */          else   /* An assertion must follow */
2545            {            {
2546            ptr++;   /* Can treat like ':' as far as spacing is concerned */            ptr++;   /* Can treat like ':' as far as spacing is concerned */
2547              if (ptr[2] != '?' ||
2548            if (ptr[2] != '?' || strchr("=!<", ptr[3]) == NULL)               (ptr[3] != '=' && ptr[3] != '!' && ptr[3] != '<') )
2549              {              {
2550              ptr += 2;    /* To get right offset in message */              ptr += 2;    /* To get right offset in message */
2551              *errorptr = ERR28;              *errorptr = ERR28;
# Line 2737  while ((c = *(++ptr)) != 0) Line 2758  while ((c = *(++ptr)) != 0)
2758          if ((compile_block.ctypes[c] & ctype_space) != 0) continue;          if ((compile_block.ctypes[c] & ctype_space) != 0) continue;
2759          if (c == '#')          if (c == '#')
2760            {            {
2761            while ((c = *(++ptr)) != 0 && c != '\n');            /* The space before the ; is to avoid a warning on a silly compiler
2762              on the Macintosh. */
2763              while ((c = *(++ptr)) != 0 && c != '\n') ;
2764            continue;            continue;
2765            }            }
2766          }          }
# Line 3195  Arguments: Line 3218  Arguments:
3218     offset_top  current top pointer     offset_top  current top pointer
3219     md          pointer to "static" info for the match     md          pointer to "static" info for the match
3220     ims         current /i, /m, and /s options     ims         current /i, /m, and /s options
3221     condassert  TRUE if called to check a condition assertion     eptrb       pointer to chain of blocks containing eptr at start of
3222     eptrb       eptr at start of last bracket                   brackets - for testing for empty matches
3223       flags       can contain
3224                     match_condassert - this is an assertion condition
3225                     match_isgroup - this is the start of a bracketed group
3226    
3227  Returns:       TRUE if matched  Returns:       TRUE if matched
3228  */  */
3229    
3230  static BOOL  static BOOL
3231  match(register const uschar *eptr, register const uschar *ecode,  match(register const uschar *eptr, register const uschar *ecode,
3232    int offset_top, match_data *md, unsigned long int ims, BOOL condassert,    int offset_top, match_data *md, unsigned long int ims, eptrblock *eptrb,
3233    const uschar *eptrb)    int flags)
3234  {  {
3235  unsigned long int original_ims = ims;   /* Save for resetting on ')' */  unsigned long int original_ims = ims;   /* Save for resetting on ')' */
3236    eptrblock newptrb;
3237    
3238    /* At the start of a bracketed group, add the current subject pointer to the
3239    stack of such pointers, to be re-instated at the end of the group when we hit
3240    the closing ket. When match() is called in other circumstances, we don't add to
3241    the stack. */
3242    
3243    if ((flags & match_isgroup) != 0)
3244      {
3245      newptrb.prev = eptrb;
3246      newptrb.saved_eptr = eptr;
3247      eptrb = &newptrb;
3248      }
3249    
3250    /* Now start processing the operations. */
3251    
3252  for (;;)  for (;;)
3253    {    {
# Line 3252  for (;;) Line 3293  for (;;)
3293    
3294        do        do
3295          {          {
3296          if (match(eptr, ecode+3, offset_top, md, ims, FALSE, eptr)) return TRUE;          if (match(eptr, ecode+3, offset_top, md, ims, eptrb, match_isgroup))
3297              return TRUE;
3298          ecode += (ecode[1] << 8) + ecode[2];          ecode += (ecode[1] << 8) + ecode[2];
3299          }          }
3300        while (*ecode == OP_ALT);        while (*ecode == OP_ALT);
# Line 3278  for (;;) Line 3320  for (;;)
3320      DPRINTF(("start bracket 0\n"));      DPRINTF(("start bracket 0\n"));
3321      do      do
3322        {        {
3323        if (match(eptr, ecode+3, offset_top, md, ims, FALSE, eptr)) return TRUE;        if (match(eptr, ecode+3, offset_top, md, ims, eptrb, match_isgroup))
3324            return TRUE;
3325        ecode += (ecode[1] << 8) + ecode[2];        ecode += (ecode[1] << 8) + ecode[2];
3326        }        }
3327      while (*ecode == OP_ALT);      while (*ecode == OP_ALT);
# Line 3297  for (;;) Line 3340  for (;;)
3340        return match(eptr,        return match(eptr,
3341          ecode + ((offset < offset_top && md->offset_vector[offset] >= 0)?          ecode + ((offset < offset_top && md->offset_vector[offset] >= 0)?
3342            5 : 3 + (ecode[1] << 8) + ecode[2]),            5 : 3 + (ecode[1] << 8) + ecode[2]),
3343          offset_top, md, ims, FALSE, eptr);          offset_top, md, ims, eptrb, match_isgroup);
3344        }        }
3345    
3346      /* The condition is an assertion. Call match() to evaluate it - setting      /* The condition is an assertion. Call match() to evaluate it - setting
# Line 3305  for (;;) Line 3348  for (;;)
3348    
3349      else      else
3350        {        {
3351        if (match(eptr, ecode+3, offset_top, md, ims, TRUE, NULL))        if (match(eptr, ecode+3, offset_top, md, ims, NULL,
3352              match_condassert | match_isgroup))
3353          {          {
3354          ecode += 3 + (ecode[4] << 8) + ecode[5];          ecode += 3 + (ecode[4] << 8) + ecode[5];
3355          while (*ecode == OP_ALT) ecode += (ecode[1] << 8) + ecode[2];          while (*ecode == OP_ALT) ecode += (ecode[1] << 8) + ecode[2];
3356          }          }
3357        else ecode += (ecode[1] << 8) + ecode[2];        else ecode += (ecode[1] << 8) + ecode[2];
3358        return match(eptr, ecode+3, offset_top, md, ims, FALSE, eptr);        return match(eptr, ecode+3, offset_top, md, ims, eptrb, match_isgroup);
3359        }        }
3360      /* Control never reaches here */      /* Control never reaches here */
3361    
# Line 3348  for (;;) Line 3392  for (;;)
3392      case OP_ASSERTBACK:      case OP_ASSERTBACK:
3393      do      do
3394        {        {
3395        if (match(eptr, ecode+3, offset_top, md, ims, FALSE, NULL)) break;        if (match(eptr, ecode+3, offset_top, md, ims, NULL, match_isgroup)) break;
3396        ecode += (ecode[1] << 8) + ecode[2];        ecode += (ecode[1] << 8) + ecode[2];
3397        }        }
3398      while (*ecode == OP_ALT);      while (*ecode == OP_ALT);
# Line 3356  for (;;) Line 3400  for (;;)
3400    
3401      /* If checking an assertion for a condition, return TRUE. */      /* If checking an assertion for a condition, return TRUE. */
3402    
3403      if (condassert) return TRUE;      if ((flags & match_condassert) != 0) return TRUE;
3404    
3405      /* Continue from after the assertion, updating the offsets high water      /* Continue from after the assertion, updating the offsets high water
3406      mark, since extracts may have been taken during the assertion. */      mark, since extracts may have been taken during the assertion. */
# Line 3372  for (;;) Line 3416  for (;;)
3416      case OP_ASSERTBACK_NOT:      case OP_ASSERTBACK_NOT:
3417      do      do
3418        {        {
3419        if (match(eptr, ecode+3, offset_top, md, ims, FALSE, NULL)) return FALSE;        if (match(eptr, ecode+3, offset_top, md, ims, NULL, match_isgroup))
3420            return FALSE;
3421        ecode += (ecode[1] << 8) + ecode[2];        ecode += (ecode[1] << 8) + ecode[2];
3422        }        }
3423      while (*ecode == OP_ALT);      while (*ecode == OP_ALT);
3424    
3425      if (condassert) return TRUE;      if ((flags & match_condassert) != 0) return TRUE;
3426    
3427      ecode += 3;      ecode += 3;
3428      continue;      continue;
3429    
# Line 3423  for (;;) Line 3469  for (;;)
3469    
3470        for (i = 1; i <= c; i++)        for (i = 1; i <= c; i++)
3471          save[i] = md->offset_vector[md->offset_end - i];          save[i] = md->offset_vector[md->offset_end - i];
3472        rc = match(eptr, md->start_pattern, offset_top, md, ims, FALSE, eptrb);        rc = match(eptr, md->start_pattern, offset_top, md, ims, eptrb,
3473            match_isgroup);
3474        for (i = 1; i <= c; i++)        for (i = 1; i <= c; i++)
3475          md->offset_vector[md->offset_end - i] = save[i];          md->offset_vector[md->offset_end - i] = save[i];
3476        if (save != stacksave) (pcre_free)(save);        if (save != stacksave) (pcre_free)(save);
# Line 3449  for (;;) Line 3496  for (;;)
3496      case OP_ONCE:      case OP_ONCE:
3497        {        {
3498        const uschar *prev = ecode;        const uschar *prev = ecode;
3499          const uschar *saved_eptr = eptr;
3500    
3501        do        do
3502          {          {
3503          if (match(eptr, ecode+3, offset_top, md, ims, FALSE, eptr)) break;          if (match(eptr, ecode+3, offset_top, md, ims, eptrb, match_isgroup))
3504              break;
3505          ecode += (ecode[1] << 8) + ecode[2];          ecode += (ecode[1] << 8) + ecode[2];
3506          }          }
3507        while (*ecode == OP_ALT);        while (*ecode == OP_ALT);
# Line 3475  for (;;) Line 3524  for (;;)
3524        5.005. If there is an options reset, it will get obeyed in the normal        5.005. If there is an options reset, it will get obeyed in the normal
3525        course of events. */        course of events. */
3526    
3527        if (*ecode == OP_KET || eptr == eptrb)        if (*ecode == OP_KET || eptr == saved_eptr)
3528          {          {
3529          ecode += 3;          ecode += 3;
3530          break;          break;
# Line 3494  for (;;) Line 3543  for (;;)
3543    
3544        if (*ecode == OP_KETRMIN)        if (*ecode == OP_KETRMIN)
3545          {          {
3546          if (match(eptr, ecode+3, offset_top, md, ims, FALSE, eptr) ||          if (match(eptr, ecode+3, offset_top, md, ims, eptrb, 0) ||
3547              match(eptr, prev, offset_top, md, ims, FALSE, eptr)) return TRUE;              match(eptr, prev, offset_top, md, ims, eptrb, match_isgroup))
3548                  return TRUE;
3549          }          }
3550        else  /* OP_KETRMAX */        else  /* OP_KETRMAX */
3551          {          {
3552          if (match(eptr, prev, offset_top, md, ims, FALSE, eptr) ||          if (match(eptr, prev, offset_top, md, ims, eptrb, match_isgroup) ||
3553              match(eptr, ecode+3, offset_top, md, ims, FALSE, eptr)) return TRUE;              match(eptr, ecode+3, offset_top, md, ims, eptrb, 0)) return TRUE;
3554          }          }
3555        }        }
3556      return FALSE;      return FALSE;
# Line 3521  for (;;) Line 3571  for (;;)
3571      case OP_BRAZERO:      case OP_BRAZERO:
3572        {        {
3573        const uschar *next = ecode+1;        const uschar *next = ecode+1;
3574        if (match(eptr, next, offset_top, md, ims, FALSE, eptr)) return TRUE;        if (match(eptr, next, offset_top, md, ims, eptrb, match_isgroup))
3575            return TRUE;
3576        do next += (next[1] << 8) + next[2]; while (*next == OP_ALT);        do next += (next[1] << 8) + next[2]; while (*next == OP_ALT);
3577        ecode = next + 3;        ecode = next + 3;
3578        }        }
# Line 3531  for (;;) Line 3582  for (;;)
3582        {        {
3583        const uschar *next = ecode+1;        const uschar *next = ecode+1;
3584        do next += (next[1] << 8) + next[2]; while (*next == OP_ALT);        do next += (next[1] << 8) + next[2]; while (*next == OP_ALT);
3585        if (match(eptr, next+3, offset_top, md, ims, FALSE, eptr)) return TRUE;        if (match(eptr, next+3, offset_top, md, ims, eptrb, match_isgroup))
3586            return TRUE;
3587        ecode++;        ecode++;
3588        }        }
3589      break;      break;
# Line 3546  for (;;) Line 3598  for (;;)
3598      case OP_KETRMAX:      case OP_KETRMAX:
3599        {        {
3600        const uschar *prev = ecode - (ecode[1] << 8) - ecode[2];        const uschar *prev = ecode - (ecode[1] << 8) - ecode[2];
3601          const uschar *saved_eptr = eptrb->saved_eptr;
3602    
3603          eptrb = eptrb->prev;    /* Back up the stack of bracket start pointers */
3604    
3605        if (*prev == OP_ASSERT || *prev == OP_ASSERT_NOT ||        if (*prev == OP_ASSERT || *prev == OP_ASSERT_NOT ||
3606            *prev == OP_ASSERTBACK || *prev == OP_ASSERTBACK_NOT ||            *prev == OP_ASSERTBACK || *prev == OP_ASSERTBACK_NOT ||
# Line 3565  for (;;) Line 3620  for (;;)
3620          int number = *prev - OP_BRA;          int number = *prev - OP_BRA;
3621          int offset = number << 1;          int offset = number << 1;
3622    
3623          DPRINTF(("end bracket %d\n", number));  #ifdef DEBUG
3624            printf("end bracket %d", number);
3625            printf("\n");
3626    #endif
3627    
3628          if (number > 0)          if (number > 0)
3629            {            {
# Line 3591  for (;;) Line 3649  for (;;)
3649        5.005. If there is an options reset, it will get obeyed in the normal        5.005. If there is an options reset, it will get obeyed in the normal
3650        course of events. */        course of events. */
3651    
3652        if (*ecode == OP_KET || eptr == eptrb)        if (*ecode == OP_KET || eptr == saved_eptr)
3653          {          {
3654          ecode += 3;          ecode += 3;
3655          break;          break;
# Line 3602  for (;;) Line 3660  for (;;)
3660    
3661        if (*ecode == OP_KETRMIN)        if (*ecode == OP_KETRMIN)
3662          {          {
3663          if (match(eptr, ecode+3, offset_top, md, ims, FALSE, eptr) ||          if (match(eptr, ecode+3, offset_top, md, ims, eptrb, 0) ||
3664              match(eptr, prev, offset_top, md, ims, FALSE, eptr)) return TRUE;              match(eptr, prev, offset_top, md, ims, eptrb, match_isgroup))
3665                  return TRUE;
3666          }          }
3667        else  /* OP_KETRMAX */        else  /* OP_KETRMAX */
3668          {          {
3669          if (match(eptr, prev, offset_top, md, ims, FALSE, eptr) ||          if (match(eptr, prev, offset_top, md, ims, eptrb, match_isgroup) ||
3670              match(eptr, ecode+3, offset_top, md, ims, FALSE, eptr)) return TRUE;              match(eptr, ecode+3, offset_top, md, ims, eptrb, 0)) return TRUE;
3671          }          }
3672        }        }
3673      return FALSE;      return FALSE;
# Line 3819  for (;;) Line 3878  for (;;)
3878          {          {
3879          for (i = min;; i++)          for (i = min;; i++)
3880            {            {
3881            if (match(eptr, ecode, offset_top, md, ims, FALSE, eptrb))            if (match(eptr, ecode, offset_top, md, ims, eptrb, 0))
3882              return TRUE;              return TRUE;
3883            if (i >= max || !match_ref(offset, eptr, length, md, ims))            if (i >= max || !match_ref(offset, eptr, length, md, ims))
3884              return FALSE;              return FALSE;
# Line 3840  for (;;) Line 3899  for (;;)
3899            }            }
3900          while (eptr >= pp)          while (eptr >= pp)
3901            {            {
3902            if (match(eptr, ecode, offset_top, md, ims, FALSE, eptrb))            if (match(eptr, ecode, offset_top, md, ims, eptrb, 0))
3903              return TRUE;              return TRUE;
3904            eptr -= length;            eptr -= length;
3905            }            }
# Line 3911  for (;;) Line 3970  for (;;)
3970          {          {
3971          for (i = min;; i++)          for (i = min;; i++)
3972            {            {
3973            if (match(eptr, ecode, offset_top, md, ims, FALSE, eptrb))            if (match(eptr, ecode, offset_top, md, ims, eptrb, 0))
3974              return TRUE;              return TRUE;
3975            if (i >= max || eptr >= md->end_subject) return FALSE;            if (i >= max || eptr >= md->end_subject) return FALSE;
3976            c = *eptr++;            c = *eptr++;
# Line 3935  for (;;) Line 3994  for (;;)
3994            }            }
3995    
3996          while (eptr >= pp)          while (eptr >= pp)
3997            if (match(eptr--, ecode, offset_top, md, ims, FALSE, eptrb))            if (match(eptr--, ecode, offset_top, md, ims, eptrb, 0))
3998              return TRUE;              return TRUE;
3999          return FALSE;          return FALSE;
4000          }          }
# Line 4032  for (;;) Line 4091  for (;;)
4091          {          {
4092          for (i = min;; i++)          for (i = min;; i++)
4093            {            {
4094            if (match(eptr, ecode, offset_top, md, ims, FALSE, eptrb))            if (match(eptr, ecode, offset_top, md, ims, eptrb, 0))
4095              return TRUE;              return TRUE;
4096            if (i >= max || eptr >= md->end_subject ||            if (i >= max || eptr >= md->end_subject ||
4097                c != md->lcc[*eptr++])                c != md->lcc[*eptr++])
# Line 4049  for (;;) Line 4108  for (;;)
4108            eptr++;            eptr++;
4109            }            }
4110          while (eptr >= pp)          while (eptr >= pp)
4111            if (match(eptr--, ecode, offset_top, md, ims, FALSE, eptrb))            if (match(eptr--, ecode, offset_top, md, ims, eptrb, 0))
4112              return TRUE;              return TRUE;
4113          return FALSE;          return FALSE;
4114          }          }
# Line 4066  for (;;) Line 4125  for (;;)
4125          {          {
4126          for (i = min;; i++)          for (i = min;; i++)
4127            {            {
4128            if (match(eptr, ecode, offset_top, md, ims, FALSE, eptrb))            if (match(eptr, ecode, offset_top, md, ims, eptrb, 0))
4129              return TRUE;              return TRUE;
4130            if (i >= max || eptr >= md->end_subject || c != *eptr++) return FALSE;            if (i >= max || eptr >= md->end_subject || c != *eptr++) return FALSE;
4131            }            }
# Line 4081  for (;;) Line 4140  for (;;)
4140            eptr++;            eptr++;
4141            }            }
4142          while (eptr >= pp)          while (eptr >= pp)
4143           if (match(eptr--, ecode, offset_top, md, ims, FALSE, eptrb))           if (match(eptr--, ecode, offset_top, md, ims, eptrb, 0))
4144             return TRUE;             return TRUE;
4145          return FALSE;          return FALSE;
4146          }          }
# Line 4163  for (;;) Line 4222  for (;;)
4222          {          {
4223          for (i = min;; i++)          for (i = min;; i++)
4224            {            {
4225            if (match(eptr, ecode, offset_top, md, ims, FALSE, eptrb))            if (match(eptr, ecode, offset_top, md, ims, eptrb, 0))
4226              return TRUE;              return TRUE;
4227            if (i >= max || eptr >= md->end_subject ||            if (i >= max || eptr >= md->end_subject ||
4228                c == md->lcc[*eptr++])                c == md->lcc[*eptr++])
# Line 4180  for (;;) Line 4239  for (;;)
4239            eptr++;            eptr++;
4240            }            }
4241          while (eptr >= pp)          while (eptr >= pp)
4242            if (match(eptr--, ecode, offset_top, md, ims, FALSE, eptrb))            if (match(eptr--, ecode, offset_top, md, ims, eptrb, 0))
4243              return TRUE;              return TRUE;
4244          return FALSE;          return FALSE;
4245          }          }
# Line 4197  for (;;) Line 4256  for (;;)
4256          {          {
4257          for (i = min;; i++)          for (i = min;; i++)
4258            {            {
4259            if (match(eptr, ecode, offset_top, md, ims, FALSE, eptrb))            if (match(eptr, ecode, offset_top, md, ims, eptrb, 0))
4260              return TRUE;              return TRUE;
4261            if (i >= max || eptr >= md->end_subject || c == *eptr++) return FALSE;            if (i >= max || eptr >= md->end_subject || c == *eptr++) return FALSE;
4262            }            }
# Line 4212  for (;;) Line 4271  for (;;)
4271            eptr++;            eptr++;
4272            }            }
4273          while (eptr >= pp)          while (eptr >= pp)
4274           if (match(eptr--, ecode, offset_top, md, ims, FALSE, eptrb))           if (match(eptr--, ecode, offset_top, md, ims, eptrb, 0))
4275             return TRUE;             return TRUE;
4276          return FALSE;          return FALSE;
4277          }          }
# Line 4312  for (;;) Line 4371  for (;;)
4371        {        {
4372        for (i = min;; i++)        for (i = min;; i++)
4373          {          {
4374          if (match(eptr, ecode, offset_top, md, ims, FALSE, eptrb)) return TRUE;          if (match(eptr, ecode, offset_top, md, ims, eptrb, 0)) return TRUE;
4375          if (i >= max || eptr >= md->end_subject) return FALSE;          if (i >= max || eptr >= md->end_subject) return FALSE;
4376    
4377          c = *eptr++;          c = *eptr++;
# Line 4431  for (;;) Line 4490  for (;;)
4490          }          }
4491    
4492        while (eptr >= pp)        while (eptr >= pp)
4493          if (match(eptr--, ecode, offset_top, md, ims, FALSE, eptrb))          if (match(eptr--, ecode, offset_top, md, ims, eptrb, 0))
4494            return TRUE;            return TRUE;
4495        return FALSE;        return FALSE;
4496        }        }
# Line 4717  do Line 4776  do
4776    if certain parts of the pattern were not used. */    if certain parts of the pattern were not used. */
4777    
4778    match_block.start_match = start_match;    match_block.start_match = start_match;
4779    if (!match(start_match, re->code, 2, &match_block, ims, FALSE, start_match))    if (!match(start_match, re->code, 2, &match_block, ims, NULL, match_isgroup))
4780      continue;      continue;
4781    
4782    /* Copy the offset information from temporary store if necessary */    /* Copy the offset information from temporary store if necessary */
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