/[pcre]/code/trunk/pcre_dfa_exec.c
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revision 389 by ph10, Sun Mar 15 18:24:05 2009 UTC revision 442 by ph10, Fri Sep 11 10:21:02 2009 UTC
# Line 3  Line 3 
3  *************************************************/  *************************************************/
4    
5  /* PCRE is a library of functions to support regular expressions whose syntax  /* PCRE is a library of functions to support regular expressions whose syntax
6  and semantics are as close as possible to those of the Perl 5 language (but see  and semantics are as close as possible to those of the Perl 5 language (but see
7  below for why this module is different).  below for why this module is different).
8    
9                         Written by Philip Hazel                         Written by Philip Hazel
# Line 45  FSM). This is NOT Perl- compatible, but Line 45  FSM). This is NOT Perl- compatible, but
45  applications. */  applications. */
46    
47    
48    /* NOTE ABOUT PERFORMANCE: A user of this function sent some code that improved
49    the performance of his patterns greatly. I could not use it as it stood, as it
50    was not thread safe, and made assumptions about pattern sizes. Also, it caused
51    test 7 to loop, and test 9 to crash with a segfault.
52    
53    The issue is the check for duplicate states, which is done by a simple linear
54    search up the state list. (Grep for "duplicate" below to find the code.) For
55    many patterns, there will never be many states active at one time, so a simple
56    linear search is fine. In patterns that have many active states, it might be a
57    bottleneck. The suggested code used an indexing scheme to remember which states
58    had previously been used for each character, and avoided the linear search when
59    it knew there was no chance of a duplicate. This was implemented when adding
60    states to the state lists.
61    
62    I wrote some thread-safe, not-limited code to try something similar at the time
63    of checking for duplicates (instead of when adding states), using index vectors
64    on the stack. It did give a 13% improvement with one specially constructed
65    pattern for certain subject strings, but on other strings and on many of the
66    simpler patterns in the test suite it did worse. The major problem, I think,
67    was the extra time to initialize the index. This had to be done for each call
68    of internal_dfa_exec(). (The supplied patch used a static vector, initialized
69    only once - I suspect this was the cause of the problems with the tests.)
70    
71    Overall, I concluded that the gains in some cases did not outweigh the losses
72    in others, so I abandoned this code. */
73    
74    
75    
76  #ifdef HAVE_CONFIG_H  #ifdef HAVE_CONFIG_H
77  #include "config.h"  #include "config.h"
78  #endif  #endif
# Line 61  applications. */ Line 89  applications. */
89  #define SP "                   "  #define SP "                   "
90    
91    
   
92  /*************************************************  /*************************************************
93  *      Code parameters and static tables         *  *      Code parameters and static tables         *
94  *************************************************/  *************************************************/
# Line 390  if (*first_op == OP_REVERSE) Line 417  if (*first_op == OP_REVERSE)
417        current_subject - start_subject : max_back;        current_subject - start_subject : max_back;
418      current_subject -= gone_back;      current_subject -= gone_back;
419      }      }
420    
421      /* Save the earliest consulted character */
422    
423      if (current_subject < md->start_used_ptr)
424        md->start_used_ptr = current_subject;
425    
426    /* Now we can process the individual branches. */    /* Now we can process the individual branches. */
427    
# Line 455  for (;;) Line 487  for (;;)
487    int i, j;    int i, j;
488    int clen, dlen;    int clen, dlen;
489    unsigned int c, d;    unsigned int c, d;
490      int forced_fail = 0;
491      int reached_end = 0;
492    
493    /* Make the new state list into the active state list and empty the    /* Make the new state list into the active state list and empty the
494    new state list. */    new state list. */
# Line 512  for (;;) Line 546  for (;;)
546      stateblock *current_state = active_states + i;      stateblock *current_state = active_states + i;
547      const uschar *code;      const uschar *code;
548      int state_offset = current_state->offset;      int state_offset = current_state->offset;
549      int count, codevalue;      int count, codevalue, rrc;
550    
551  #ifdef DEBUG  #ifdef DEBUG
552      printf ("%.*sProcessing state %d c=", rlevel*2-2, SP, state_offset);      printf ("%.*sProcessing state %d c=", rlevel*2-2, SP, state_offset);
# Line 544  for (;;) Line 578  for (;;)
578          }          }
579        }        }
580    
581      /* Check for a duplicate state with the same count, and skip if found. */      /* Check for a duplicate state with the same count, and skip if found.
582        See the note at the head of this module about the possibility of improving
583        performance here. */
584    
585      for (j = 0; j < i; j++)      for (j = 0; j < i; j++)
586        {        {
# Line 611  for (;;) Line 647  for (;;)
647  /* ========================================================================== */  /* ========================================================================== */
648        /* Reached a closing bracket. If not at the end of the pattern, carry        /* Reached a closing bracket. If not at the end of the pattern, carry
649        on with the next opcode. Otherwise, unless we have an empty string and        on with the next opcode. Otherwise, unless we have an empty string and
650        PCRE_NOTEMPTY is set, save the match data, shifting up all previous        PCRE_NOTEMPTY is set, or PCRE_NOTEMPTY_ATSTART is set and we are at the
651          start of the subject, save the match data, shifting up all previous
652        matches so we always have the longest first. */        matches so we always have the longest first. */
653    
654        case OP_KET:        case OP_KET:
# Line 625  for (;;) Line 662  for (;;)
662            ADD_ACTIVE(state_offset - GET(code, 1), 0);            ADD_ACTIVE(state_offset - GET(code, 1), 0);
663            }            }
664          }          }
665        else if (ptr > current_subject || (md->moptions & PCRE_NOTEMPTY) == 0)        else
666          {          {
667          if (match_count < 0) match_count = (offsetcount >= 2)? 1 : 0;          reached_end++;    /* Count branches that reach the end */
668            else if (match_count > 0 && ++match_count * 2 >= offsetcount)          if (ptr > current_subject ||
669              match_count = 0;              ((md->moptions & PCRE_NOTEMPTY) == 0 &&
670          count = ((match_count == 0)? offsetcount : match_count * 2) - 2;                ((md->moptions & PCRE_NOTEMPTY_ATSTART) == 0 ||
671          if (count > 0) memmove(offsets + 2, offsets, count * sizeof(int));                  current_subject > start_subject + md->start_offset)))
672          if (offsetcount >= 2)            {
673            {            if (match_count < 0) match_count = (offsetcount >= 2)? 1 : 0;
674            offsets[0] = current_subject - start_subject;              else if (match_count > 0 && ++match_count * 2 >= offsetcount)
675            offsets[1] = ptr - start_subject;                match_count = 0;
676            DPRINTF(("%.*sSet matched string = \"%.*s\"\n", rlevel*2-2, SP,            count = ((match_count == 0)? offsetcount : match_count * 2) - 2;
677              offsets[1] - offsets[0], current_subject));            if (count > 0) memmove(offsets + 2, offsets, count * sizeof(int));
678            }            if (offsetcount >= 2)
679          if ((md->moptions & PCRE_DFA_SHORTEST) != 0)              {
680            {              offsets[0] = current_subject - start_subject;
681            DPRINTF(("%.*sEnd of internal_dfa_exec %d: returning %d\n"              offsets[1] = ptr - start_subject;
682              "%.*s---------------------\n\n", rlevel*2-2, SP, rlevel,              DPRINTF(("%.*sSet matched string = \"%.*s\"\n", rlevel*2-2, SP,
683              match_count, rlevel*2-2, SP));                offsets[1] - offsets[0], current_subject));
684            return match_count;              }
685            }            if ((md->moptions & PCRE_DFA_SHORTEST) != 0)
686                {
687                DPRINTF(("%.*sEnd of internal_dfa_exec %d: returning %d\n"
688                  "%.*s---------------------\n\n", rlevel*2-2, SP, rlevel,
689                  match_count, rlevel*2-2, SP));
690                return match_count;
691                }
692              }
693          }          }
694        break;        break;
695    
# Line 795  for (;;) Line 839  for (;;)
839          if (ptr > start_subject)          if (ptr > start_subject)
840            {            {
841            const uschar *temp = ptr - 1;            const uschar *temp = ptr - 1;
842              if (temp < md->start_used_ptr) md->start_used_ptr = temp;
843  #ifdef SUPPORT_UTF8  #ifdef SUPPORT_UTF8
844            if (utf8) BACKCHAR(temp);            if (utf8) BACKCHAR(temp);
845  #endif  #endif
# Line 803  for (;;) Line 848  for (;;)
848            }            }
849          else left_word = 0;          else left_word = 0;
850    
851          if (clen > 0) right_word = c < 256 && (ctypes[c] & ctype_word) != 0;          if (clen > 0)
852            else right_word = 0;            right_word = c < 256 && (ctypes[c] & ctype_word) != 0;
853            else              /* This is a fudge to ensure that if this is the */
854              {               /* last item in the pattern, we don't count it as */
855              reached_end--;  /* reached, thus disabling a partial match. */
856              right_word = 0;
857              }
858    
859          if ((left_word == right_word) == (codevalue == OP_NOT_WORD_BOUNDARY))          if ((left_word == right_word) == (codevalue == OP_NOT_WORD_BOUNDARY))
860            { ADD_ACTIVE(state_offset + 1, 0); }            { ADD_ACTIVE(state_offset + 1, 0); }
# Line 2158  for (;;) Line 2208  for (;;)
2208    
2209  /* ========================================================================== */  /* ========================================================================== */
2210        /* These are the opcodes for fancy brackets of various kinds. We have        /* These are the opcodes for fancy brackets of various kinds. We have
2211        to use recursion in order to handle them. The "always failing" assersion        to use recursion in order to handle them. The "always failing" assertion
2212        (?!) is optimised when compiling to OP_FAIL, so we have to support that,        (?!) is optimised to OP_FAIL when compiling, so we have to support that,
2213        though the other "backtracking verbs" are not supported. */        though the other "backtracking verbs" are not supported. */
2214    
2215        case OP_FAIL:        case OP_FAIL:
2216          forced_fail++;    /* Count FAILs for multiple states */
2217        break;        break;
2218    
2219        case OP_ASSERT:        case OP_ASSERT:
# Line 2201  for (;;) Line 2252  for (;;)
2252          {          {
2253          int local_offsets[1000];          int local_offsets[1000];
2254          int local_workspace[1000];          int local_workspace[1000];
2255          int condcode = code[LINK_SIZE+1];          int codelink = GET(code, 1);
2256            int condcode;
2257    
2258            /* Because of the way auto-callout works during compile, a callout item
2259            is inserted between OP_COND and an assertion condition. This does not
2260            happen for the other conditions. */
2261    
2262            if (code[LINK_SIZE+1] == OP_CALLOUT)
2263              {
2264              rrc = 0;
2265              if (pcre_callout != NULL)
2266                {
2267                pcre_callout_block cb;
2268                cb.version          = 1;   /* Version 1 of the callout block */
2269                cb.callout_number   = code[LINK_SIZE+2];
2270                cb.offset_vector    = offsets;
2271                cb.subject          = (PCRE_SPTR)start_subject;
2272                cb.subject_length   = end_subject - start_subject;
2273                cb.start_match      = current_subject - start_subject;
2274                cb.current_position = ptr - start_subject;
2275                cb.pattern_position = GET(code, LINK_SIZE + 3);
2276                cb.next_item_length = GET(code, 3 + 2*LINK_SIZE);
2277                cb.capture_top      = 1;
2278                cb.capture_last     = -1;
2279                cb.callout_data     = md->callout_data;
2280                if ((rrc = (*pcre_callout)(&cb)) < 0) return rrc;   /* Abandon */
2281                }
2282              if (rrc > 0) break;                      /* Fail this thread */
2283              code += _pcre_OP_lengths[OP_CALLOUT];    /* Skip callout data */
2284              }
2285    
2286            condcode = code[LINK_SIZE+1];
2287    
2288          /* Back reference conditions are not supported */          /* Back reference conditions are not supported */
2289    
# Line 2210  for (;;) Line 2292  for (;;)
2292          /* The DEFINE condition is always false */          /* The DEFINE condition is always false */
2293    
2294          if (condcode == OP_DEF)          if (condcode == OP_DEF)
2295            {            { ADD_ACTIVE(state_offset + codelink + LINK_SIZE + 1, 0); }
           ADD_ACTIVE(state_offset + GET(code, 1) + LINK_SIZE + 1, 0);  
           }  
2296    
2297          /* The only supported version of OP_RREF is for the value RREF_ANY,          /* The only supported version of OP_RREF is for the value RREF_ANY,
2298          which means "test if in any recursion". We can't test for specifically          which means "test if in any recursion". We can't test for specifically
# Line 2222  for (;;) Line 2302  for (;;)
2302            {            {
2303            int value = GET2(code, LINK_SIZE+2);            int value = GET2(code, LINK_SIZE+2);
2304            if (value != RREF_ANY) return PCRE_ERROR_DFA_UCOND;            if (value != RREF_ANY) return PCRE_ERROR_DFA_UCOND;
2305            if (recursing > 0) { ADD_ACTIVE(state_offset + LINK_SIZE + 4, 0); }            if (recursing > 0)
2306              else { ADD_ACTIVE(state_offset + GET(code, 1) + LINK_SIZE + 1, 0); }              { ADD_ACTIVE(state_offset + LINK_SIZE + 4, 0); }
2307              else { ADD_ACTIVE(state_offset + codelink + LINK_SIZE + 1, 0); }
2308            }            }
2309    
2310          /* Otherwise, the condition is an assertion */          /* Otherwise, the condition is an assertion */
# Line 2253  for (;;) Line 2334  for (;;)
2334                  (condcode == OP_ASSERT || condcode == OP_ASSERTBACK))                  (condcode == OP_ASSERT || condcode == OP_ASSERTBACK))
2335              { ADD_ACTIVE(endasscode + LINK_SIZE + 1 - start_code, 0); }              { ADD_ACTIVE(endasscode + LINK_SIZE + 1 - start_code, 0); }
2336            else            else
2337              { ADD_ACTIVE(state_offset + GET(code, 1) + LINK_SIZE + 1, 0); }              { ADD_ACTIVE(state_offset + codelink + LINK_SIZE + 1, 0); }
2338            }            }
2339          }          }
2340        break;        break;
# Line 2405  for (;;) Line 2486  for (;;)
2486        /* Handle callouts */        /* Handle callouts */
2487    
2488        case OP_CALLOUT:        case OP_CALLOUT:
2489          rrc = 0;
2490        if (pcre_callout != NULL)        if (pcre_callout != NULL)
2491          {          {
         int rrc;  
2492          pcre_callout_block cb;          pcre_callout_block cb;
2493          cb.version          = 1;   /* Version 1 of the callout block */          cb.version          = 1;   /* Version 1 of the callout block */
2494          cb.callout_number   = code[1];          cb.callout_number   = code[1];
# Line 2422  for (;;) Line 2503  for (;;)
2503          cb.capture_last     = -1;          cb.capture_last     = -1;
2504          cb.callout_data     = md->callout_data;          cb.callout_data     = md->callout_data;
2505          if ((rrc = (*pcre_callout)(&cb)) < 0) return rrc;   /* Abandon */          if ((rrc = (*pcre_callout)(&cb)) < 0) return rrc;   /* Abandon */
         if (rrc == 0) { ADD_ACTIVE(state_offset + 2 + 2*LINK_SIZE, 0); }  
2506          }          }
2507          if (rrc == 0)
2508            { ADD_ACTIVE(state_offset + _pcre_OP_lengths[OP_CALLOUT], 0); }
2509        break;        break;
2510    
2511    
# Line 2439  for (;;) Line 2521  for (;;)
2521    /* We have finished the processing at the current subject character. If no    /* We have finished the processing at the current subject character. If no
2522    new states have been set for the next character, we have found all the    new states have been set for the next character, we have found all the
2523    matches that we are going to find. If we are at the top level and partial    matches that we are going to find. If we are at the top level and partial
2524    matching has been requested, check for appropriate conditions. */    matching has been requested, check for appropriate conditions. The "forced_
2525      fail" variable counts the number of (*F) encountered for the character. If it
2526      is equal to the original active_count (saved in workspace[1]) it means that
2527      (*F) was found on every active state. In this case we don't want to give a
2528      partial match. */
2529    
2530    if (new_count <= 0)    if (new_count <= 0)
2531      {      {
2532      if (match_count < 0 &&                     /* No matches found */      if (rlevel == 1 &&                               /* Top level, and */
2533          rlevel == 1 &&                         /* Top level match function */          reached_end != workspace[1] &&               /* Not all reached end */
2534          (md->moptions & PCRE_PARTIAL) != 0 &&  /* Want partial matching */          forced_fail != workspace[1] &&               /* Not all forced fail & */
2535          ptr >= end_subject &&                  /* Reached end of subject */          (                                            /* either... */
2536          ptr > current_subject)                 /* Matched non-empty string */          (md->moptions & PCRE_PARTIAL_HARD) != 0      /* Hard partial */
2537            ||                                           /* or... */
2538            ((md->moptions & PCRE_PARTIAL_SOFT) != 0 &&  /* Soft partial and */
2539             match_count < 0)                            /* no matches */
2540            ) &&                                         /* And... */
2541            ptr >= end_subject &&                     /* Reached end of subject */
2542            ptr > current_subject)                    /* Matched non-empty string */
2543        {        {
2544        if (offsetcount >= 2)        if (offsetcount >= 2)
2545          {          {
2546          offsets[0] = current_subject - start_subject;          offsets[0] = md->start_used_ptr - start_subject;
2547          offsets[1] = end_subject - start_subject;          offsets[1] = end_subject - start_subject;
2548          }          }
2549        match_count = PCRE_ERROR_PARTIAL;        match_count = PCRE_ERROR_PARTIAL;
# Line 2593  md->start_code = (const uschar *)argumen Line 2685  md->start_code = (const uschar *)argumen
2685      re->name_table_offset + re->name_count * re->name_entry_size;      re->name_table_offset + re->name_count * re->name_entry_size;
2686  md->start_subject = (const unsigned char *)subject;  md->start_subject = (const unsigned char *)subject;
2687  md->end_subject = end_subject;  md->end_subject = end_subject;
2688    md->start_offset = start_offset;
2689  md->moptions = options;  md->moptions = options;
2690  md->poptions = re->options;  md->poptions = re->options;
2691    
# Line 2615  switch ((((options & PCRE_NEWLINE_BITS) Line 2708  switch ((((options & PCRE_NEWLINE_BITS)
2708           PCRE_NEWLINE_BITS)           PCRE_NEWLINE_BITS)
2709    {    {
2710    case 0: newline = NEWLINE; break;   /* Compile-time default */    case 0: newline = NEWLINE; break;   /* Compile-time default */
2711    case PCRE_NEWLINE_CR: newline = '\r'; break;    case PCRE_NEWLINE_CR: newline = CHAR_CR; break;
2712    case PCRE_NEWLINE_LF: newline = '\n'; break;    case PCRE_NEWLINE_LF: newline = CHAR_NL; break;
2713    case PCRE_NEWLINE_CR+    case PCRE_NEWLINE_CR+
2714         PCRE_NEWLINE_LF: newline = ('\r' << 8) | '\n'; break;         PCRE_NEWLINE_LF: newline = (CHAR_CR << 8) | CHAR_NL; break;
2715    case PCRE_NEWLINE_ANY: newline = -1; break;    case PCRE_NEWLINE_ANY: newline = -1; break;
2716    case PCRE_NEWLINE_ANYCRLF: newline = -2; break;    case PCRE_NEWLINE_ANYCRLF: newline = -2; break;
2717    default: return PCRE_ERROR_BADNEWLINE;    default: return PCRE_ERROR_BADNEWLINE;
# Line 2747  for (;;) Line 2840  for (;;)
2840        while (t < md->end_subject && !IS_NEWLINE(t)) t++;        while (t < md->end_subject && !IS_NEWLINE(t)) t++;
2841        end_subject = t;        end_subject = t;
2842        }        }
2843    
2844      /* There are some optimizations that avoid running the match if a known      /* There are some optimizations that avoid running the match if a known
2845      starting point is not found, or if a known later character is not present.      starting point is not found, or if a known later character is not present.
2846      However, there is an option that disables these, for testing and for      However, there is an option that disables these, for testing and for
2847      ensuring that all callouts do actually occur. */      ensuring that all callouts do actually occur. */
2848    
2849      if ((options & PCRE_NO_START_OPTIMIZE) == 0)      if ((options & PCRE_NO_START_OPTIMIZE) == 0)
2850        {        {
2851    
2852        /* Advance to a known first byte. */        /* Advance to a known first byte. */
2853    
2854        if (first_byte >= 0)        if (first_byte >= 0)
2855          {          {
2856          if (first_byte_caseless)          if (first_byte_caseless)
# Line 2765  for (;;) Line 2858  for (;;)
2858                   lcc[*current_subject] != first_byte)                   lcc[*current_subject] != first_byte)
2859              current_subject++;              current_subject++;
2860          else          else
2861            while (current_subject < end_subject &&            while (current_subject < end_subject &&
2862                   *current_subject != first_byte)                   *current_subject != first_byte)
2863              current_subject++;              current_subject++;
2864          }          }
2865    
2866        /* Or to just after a linebreak for a multiline match if possible */        /* Or to just after a linebreak for a multiline match if possible */
2867    
2868        else if (startline)        else if (startline)
2869          {          {
2870          if (current_subject > md->start_subject + start_offset)          if (current_subject > md->start_subject + start_offset)
# Line 2779  for (;;) Line 2872  for (;;)
2872  #ifdef SUPPORT_UTF8  #ifdef SUPPORT_UTF8
2873            if (utf8)            if (utf8)
2874              {              {
2875              while (current_subject < end_subject &&              while (current_subject < end_subject &&
2876                     !WAS_NEWLINE(current_subject))                     !WAS_NEWLINE(current_subject))
2877                {                {
2878                current_subject++;                current_subject++;
# Line 2792  for (;;) Line 2885  for (;;)
2885  #endif  #endif
2886            while (current_subject < end_subject && !WAS_NEWLINE(current_subject))            while (current_subject < end_subject && !WAS_NEWLINE(current_subject))
2887              current_subject++;              current_subject++;
2888    
2889            /* If we have just passed a CR and the newline option is ANY or            /* If we have just passed a CR and the newline option is ANY or
2890            ANYCRLF, and we are now at a LF, advance the match position by one            ANYCRLF, and we are now at a LF, advance the match position by one
2891            more character. */            more character. */
2892    
2893            if (current_subject[-1] == '\r' &&            if (current_subject[-1] == CHAR_CR &&
2894                 (md->nltype == NLTYPE_ANY || md->nltype == NLTYPE_ANYCRLF) &&                 (md->nltype == NLTYPE_ANY || md->nltype == NLTYPE_ANYCRLF) &&
2895                 current_subject < end_subject &&                 current_subject < end_subject &&
2896                 *current_subject == '\n')                 *current_subject == CHAR_NL)
2897              current_subject++;              current_subject++;
2898            }            }
2899          }          }
2900    
2901        /* Or to a non-unique first char after study */        /* Or to a non-unique first char after study */
2902    
2903        else if (start_bits != NULL)        else if (start_bits != NULL)
2904          {          {
2905          while (current_subject < end_subject)          while (current_subject < end_subject)
# Line 2816  for (;;) Line 2909  for (;;)
2909              else break;              else break;
2910            }            }
2911          }          }
2912        }        }
2913    
2914      /* Restore fudged end_subject */      /* Restore fudged end_subject */
2915    
# Line 2836  for (;;) Line 2929  for (;;)
2929    showed up when somebody was matching /^C/ on a 32-megabyte string... so we    showed up when somebody was matching /^C/ on a 32-megabyte string... so we
2930    don't do this when the string is sufficiently long.    don't do this when the string is sufficiently long.
2931    
2932    ALSO: this processing is disabled when partial matching is requested, and can    ALSO: this processing is disabled when partial matching is requested, and can
2933    also be explicitly deactivated. */    also be explicitly deactivated. Furthermore, we have to disable when
2934      restarting after a partial match, because the required character may have
2935      already been matched. */
2936    
2937    if ((options & PCRE_NO_START_OPTIMIZE) == 0 &&    if ((options & PCRE_NO_START_OPTIMIZE) == 0 &&
2938        req_byte >= 0 &&        req_byte >= 0 &&
2939        end_subject - current_subject < REQ_BYTE_MAX &&        end_subject - current_subject < REQ_BYTE_MAX &&
2940        (options & PCRE_PARTIAL) == 0)        (options & (PCRE_PARTIAL_HARD|PCRE_PARTIAL_SOFT|PCRE_DFA_RESTART)) == 0)
2941      {      {
2942      register const uschar *p = current_subject + ((first_byte >= 0)? 1 : 0);      register const uschar *p = current_subject + ((first_byte >= 0)? 1 : 0);
2943    
# Line 2882  for (;;) Line 2977  for (;;)
2977    
2978    /* OK, now we can do the business */    /* OK, now we can do the business */
2979    
2980      md->start_used_ptr = current_subject;
2981    
2982    rc = internal_dfa_exec(    rc = internal_dfa_exec(
2983      md,                                /* fixed match data */      md,                                /* fixed match data */
2984      md->start_code,                    /* this subexpression's code */      md->start_code,                    /* this subexpression's code */
# Line 2916  for (;;) Line 3013  for (;;)
3013    not contain any explicit matches for \r or \n, and the newline option is CRLF    not contain any explicit matches for \r or \n, and the newline option is CRLF
3014    or ANY or ANYCRLF, advance the match position by one more character. */    or ANY or ANYCRLF, advance the match position by one more character. */
3015    
3016    if (current_subject[-1] == '\r' &&    if (current_subject[-1] == CHAR_CR &&
3017        current_subject < end_subject &&        current_subject < end_subject &&
3018        *current_subject == '\n' &&        *current_subject == CHAR_NL &&
3019        (re->flags & PCRE_HASCRORLF) == 0 &&        (re->flags & PCRE_HASCRORLF) == 0 &&
3020          (md->nltype == NLTYPE_ANY ||          (md->nltype == NLTYPE_ANY ||
3021           md->nltype == NLTYPE_ANYCRLF ||           md->nltype == NLTYPE_ANYCRLF ||

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