/[pcre]/code/tags/pcre-3.4/pcre.c
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Diff of /code/tags/pcre-3.4/pcre.c

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revision 9 by nigel, Sat Feb 24 21:38:13 2007 UTC revision 11 by nigel, Sat Feb 24 21:38:17 2007 UTC
# Line 2041  while (code < code_end) Line 2041  while (code < code_end)
2041      case OP_MINUPTO:      case OP_MINUPTO:
2042      if (isprint(c = code[3])) printf("    %c{", c);      if (isprint(c = code[3])) printf("    %c{", c);
2043        else printf("    \\x%02x{", c);        else printf("    \\x%02x{", c);
2044      if (*code != OP_EXACT) printf(",");      if (*code != OP_EXACT) printf("0,");
2045      printf("%d}", (code[1] << 8) + code[2]);      printf("%d}", (code[1] << 8) + code[2]);
2046      if (*code == OP_MINUPTO) printf("?");      if (*code == OP_MINUPTO) printf("?");
2047      code += 3;      code += 3;
# Line 3299  hide it in a separate function. This is Line 3299  hide it in a separate function. This is
3299  since it's needed only for the extension \X option, and with any luck, a good  since it's needed only for the extension \X option, and with any luck, a good
3300  compiler will spot the tail recursion and compile it efficiently.  compiler will spot the tail recursion and compile it efficiently.
3301    
3302  Arguments:    The block containing the match data  Arguments:
3303  Returns:      The return from setjump()     eptr        pointer in subject
3304       ecode       position in code
3305       offset_top  current top pointer
3306       md          pointer to "static" info for the match
3307    
3308    Returns:       TRUE if matched
3309  */  */
3310    
3311  static int  static BOOL
3312  my_setjmp(match_data *match_block)  match_with_setjmp(const uschar *eptr, const uschar *ecode, int offset_top,
3313      match_data *match_block)
3314  {  {
3315  return setjmp(match_block->fail_env);  return setjmp(match_block->fail_env) == 0 &&
3316          match(eptr, ecode, offset_top, match_block);
3317  }  }
3318    
3319    
# Line 3338  int Line 3345  int
3345  pcre_exec(const pcre *external_re, const pcre_extra *external_extra,  pcre_exec(const pcre *external_re, const pcre_extra *external_extra,
3346    const char *subject, int length, int options, int *offsets, int offsetcount)    const char *subject, int length, int options, int *offsets, int offsetcount)
3347  {  {
3348  int resetcount;  int resetcount, ocount;
 int ocount = offsetcount;  
3349  int first_char = -1;  int first_char = -1;
3350  match_data match_block;  match_data match_block;
3351  const uschar *start_bits = NULL;  const uschar *start_bits = NULL;
# Line 3347  const uschar *start_match = (const uscha Line 3353  const uschar *start_match = (const uscha
3353  const uschar *end_subject;  const uschar *end_subject;
3354  const real_pcre *re = (const real_pcre *)external_re;  const real_pcre *re = (const real_pcre *)external_re;
3355  const real_pcre_extra *extra = (const real_pcre_extra *)external_extra;  const real_pcre_extra *extra = (const real_pcre_extra *)external_extra;
3356    BOOL using_temporary_offsets = FALSE;
3357  BOOL anchored = ((re->options | options) & PCRE_ANCHORED) != 0;  BOOL anchored = ((re->options | options) & PCRE_ANCHORED) != 0;
3358  BOOL startline = (re->options & PCRE_STARTLINE) != 0;  BOOL startline = (re->options & PCRE_STARTLINE) != 0;
3359    
# Line 3375  match_block.errorcode = PCRE_ERROR_NOMAT Line 3382  match_block.errorcode = PCRE_ERROR_NOMAT
3382    
3383  /* If the expression has got more back references than the offsets supplied can  /* If the expression has got more back references than the offsets supplied can
3384  hold, we get a temporary bit of working store to use during the matching.  hold, we get a temporary bit of working store to use during the matching.
3385  Otherwise, we can use the vector supplied, rounding down the size of it to a  Otherwise, we can use the vector supplied, rounding down its size to a multiple
3386  multiple of 2. */  of 2. */
3387    
3388  ocount &= (-2);  ocount = offsetcount & (-2);
3389  if (re->top_backref > 0 && re->top_backref + 1 >= ocount/2)  if (re->top_backref > 0 && re->top_backref >= ocount/2)
3390    {    {
3391    ocount = re->top_backref * 2 + 2;    ocount = re->top_backref * 2 + 2;
3392    match_block.offset_vector = (pcre_malloc)(ocount * sizeof(int));    match_block.offset_vector = (pcre_malloc)(ocount * sizeof(int));
3393    if (match_block.offset_vector == NULL) return PCRE_ERROR_NOMEMORY;    if (match_block.offset_vector == NULL) return PCRE_ERROR_NOMEMORY;
3394      using_temporary_offsets = TRUE;
3395    DPRINTF(("Got memory to hold back references\n"));    DPRINTF(("Got memory to hold back references\n"));
3396    }    }
3397  else match_block.offset_vector = offsets;  else match_block.offset_vector = offsets;
# Line 3498  do Line 3506  do
3506    it unless PCRE_EXTRA is set, since only in that case is the "cut" operation    it unless PCRE_EXTRA is set, since only in that case is the "cut" operation
3507    enabled. */    enabled. */
3508    
3509    if (((re->options & PCRE_EXTRA) != 0 && my_setjmp(&match_block) != 0) ||    if ((re->options & PCRE_EXTRA) != 0)
3510        !match(start_match, re->code, 2, &match_block))      {
3511      continue;      if (!match_with_setjmp(start_match, re->code, 2, &match_block))
3512          continue;
3513        }
3514      else if (!match(start_match, re->code, 2, &match_block)) continue;
3515    
3516    /* Copy the offset information from temporary store if necessary */    /* Copy the offset information from temporary store if necessary */
3517    
3518    if (ocount != offsetcount)    if (using_temporary_offsets)
3519      {      {
3520      if (offsetcount >= 4)      if (offsetcount >= 4)
3521        {        {
3522        memcpy(offsets + 2, match_block.offset_vector + 2,        memcpy(offsets + 2, match_block.offset_vector + 2,
3523          (offsetcount - 2) * sizeof(int));          (offsetcount - 2) * sizeof(int));
3524        DPRINTF(("Copied offsets; freeing temporary memory\n"));        DPRINTF(("Copied offsets from temporary memory\n"));
3525        }        }
3526      if (match_block.end_offset_top > offsetcount)      if (match_block.end_offset_top > offsetcount)
3527        match_block.offset_overflow = TRUE;        match_block.offset_overflow = TRUE;
# Line 3534  while (!anchored && Line 3545  while (!anchored &&
3545         match_block.errorcode == PCRE_ERROR_NOMATCH &&         match_block.errorcode == PCRE_ERROR_NOMATCH &&
3546         start_match++ < end_subject);         start_match++ < end_subject);
3547    
3548    if (using_temporary_offsets)
3549      {
3550      DPRINTF(("Freeing temporary memory\n"));
3551      (pcre_free)(match_block.offset_vector);
3552      }
3553    
3554  DPRINTF((">>>> returning %d\n", match_block.errorcode));  DPRINTF((">>>> returning %d\n", match_block.errorcode));
3555    
3556  return match_block.errorcode;  return match_block.errorcode;
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