/[pcre]/code/trunk/pcre_exec.c

Diff of /code/trunk/pcre_exec.c

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-revision 87 by nigel,
Sat Feb 24 21:41:21 2007 UTC
+revision 243 by ph10,
Thu Sep 13 09:28:14 2007 UTC
 Line 6
  and semantics are as close as possible to those of the Perl 5 language.
                         Written by Philip Hazel
-            Copyright (c) 1997-2006 University of Cambridge
+            Copyright (c) 1997-2007 University of Cambridge
  -----------------------------------------------------------------------------
  Redistribution and use in source and binary forms, with or without
 Line 42 
 POSSIBILITY OF SUCH DAMAGE.
  pattern matching using an NFA algorithm, trying to mimic Perl as closely as
  possible. There are also some static supporting functions. */
+ #ifdef HAVE_CONFIG_H
+ #include "config.h"
+ #endif
+ #define NLBLOCK md             /* Block containing newline information */
+ #define PSSTART start_subject  /* Field containing processed string start */
+ #define PSEND   end_subject    /* Field containing processed string end */
  #include "pcre_internal.h"
+ /* Undefine some potentially clashing cpp symbols */
- /* Structure for building a chain of data that actually lives on the
+ #undef min
- stack, for holding the values of the subject pointer at the start of each
+ #undef max
- subpattern, so as to detect when an empty string has been matched by a
- subpattern - to break infinite loops. When NO_RECURSE is set, these blocks
- are on the heap, not on the stack. */
- typedef struct eptrblock {
-   struct eptrblock *epb_prev;
-   USPTR epb_saved_eptr;
- } eptrblock;
  /* Flag bits for the match() function */
- #define match_condassert   0x01    /* Called to check a condition assertion */
+ #define match_condassert     0x01  /* Called to check a condition assertion */
- #define match_isgroup      0x02    /* Set if start of bracketed group */
+ #define match_cbegroup       0x02  /* Could-be-empty unlimited repeat group */
  /* Non-error returns from the match() function. Error returns are externally
  defined PCRE_ERROR_xxx codes, which are all negative. */
 Line 68 
 defined PCRE_ERROR_xxx codes, which are
  #define MATCH_MATCH        1
  #define MATCH_NOMATCH      0
+ /* Special internal returns from the match() function. Make them sufficiently
+ negative to avoid the external error codes. */
+ #define MATCH_COMMIT       (-999)
+ #define MATCH_PRUNE        (-998)
+ #define MATCH_SKIP         (-997)
+ #define MATCH_THEN         (-996)
  /* Maximum number of ints of offset to save on the stack for recursive calls.
  If the offset vector is bigger, malloc is used. This should be a multiple of 3,
  because the offset vector is always a multiple of 3 long. */
-Line 101 
 Returns:     nothing
+Line 109 
 Returns:     nothing
  static void
  pchars(const uschar *p, int length, BOOL is_subject, match_data *md)
  {
- int c;
+ unsigned int c;
  if (is_subject && length > md->end_subject - p) length = md->end_subject - p;
  while (length-- > 0)
    if (isprint(c = *(p++))) printf("%c", c); else printf("\\x%02x", c);
-Line 186 
 calls by keeping local variables that ne
+Line 194 
 calls by keeping local variables that ne
  obtained from malloc() instead instead of on the stack. Macros are used to
  achieve this so that the actual code doesn't look very different to what it
  always used to.
+ The original heap-recursive code used longjmp(). However, it seems that this
+ can be very slow on some operating systems. Following a suggestion from Stan
+ Switzer, the use of longjmp() has been abolished, at the cost of having to
+ provide a unique number for each call to RMATCH. There is no way of generating
+ a sequence of numbers at compile time in C. I have given them names, to make
+ them stand out more clearly.
+ Crude tests on x86 Linux show a small speedup of around 5-8%. However, on
+ FreeBSD, avoiding longjmp() more than halves the time taken to run the standard
+ tests. Furthermore, not using longjmp() means that local dynamic variables
+ don't have indeterminate values; this has meant that the frame size can be
+ reduced because the result can be "passed back" by straight setting of the
+ variable instead of being passed in the frame.
  ****************************************************************************
  ***************************************************************************/
+ /* Numbers for RMATCH calls. When this list is changed, the code at HEAP_RETURN
+ below must be updated in sync.  */
+ enum { RM1=1, RM2,  RM3,  RM4,  RM5,  RM6,  RM7,  RM8,  RM9,  RM10,
+        RM11,  RM12, RM13, RM14, RM15, RM16, RM17, RM18, RM19, RM20,
+        RM21,  RM22, RM23, RM24, RM25, RM26, RM27, RM28, RM29, RM30,
+        RM31,  RM32, RM33, RM34, RM35, RM36, RM37, RM38, RM39, RM40,
+        RM41,  RM42, RM43, RM44, RM45, RM46, RM47, RM48, RM49, RM50,
+        RM51,  RM52, RM53, RM54 };
  /* These versions of the macros use the stack, as normal. There are debugging
- versions and production versions. */
+ versions and production versions. Note that the "rw" argument of RMATCH isn't
+ actuall used in this definition. */
  #ifndef NO_RECURSE
  #define REGISTER register
  #ifdef DEBUG
- #define RMATCH(rx,ra,rb,rc,rd,re,rf,rg) \
+ #define RMATCH(ra,rb,rc,rd,re,rf,rg,rw) \
    { \
    printf("match() called in line %d\n", __LINE__); \
-   rx = match(ra,rb,rc,rd,re,rf,rg,rdepth+1); \
+   rrc = match(ra,rb,mstart,rc,rd,re,rf,rg,rdepth+1); \
    printf("to line %d\n", __LINE__); \
    }
  #define RRETURN(ra) \
-Line 208 
 versions and production versions. */
+Line 241 
 versions and production versions. */
    return ra; \
    }
  #else
- #define RMATCH(rx,ra,rb,rc,rd,re,rf,rg) \
+ #define RMATCH(ra,rb,rc,rd,re,rf,rg,rw) \
-   rx = match(ra,rb,rc,rd,re,rf,rg,rdepth+1)
+   rrc = match(ra,rb,mstart,rc,rd,re,rf,rg,rdepth+1)
  #define RRETURN(ra) return ra
  #endif
  #else
- /* These versions of the macros manage a private stack on the heap. Note
+ /* These versions of the macros manage a private stack on the heap. Note that
- that the rd argument of RMATCH isn't actually used. It's the md argument of
+ the "rd" argument of RMATCH isn't actually used in this definition. It's the md
- match(), which never changes. */
+ argument of match(), which never changes. */
  #define REGISTER
- #define RMATCH(rx,ra,rb,rc,rd,re,rf,rg)\
+ #define RMATCH(ra,rb,rc,rd,re,rf,rg,rw)\
    {\
    heapframe *newframe = (pcre_stack_malloc)(sizeof(heapframe));\
-   if (setjmp(frame->Xwhere) == 0)\
+   frame->Xwhere = rw; \
-     {\
+   newframe->Xeptr = ra;\
-     newframe->Xeptr = ra;\
+   newframe->Xecode = rb;\
-     newframe->Xecode = rb;\
+   newframe->Xmstart = mstart;\
-     newframe->Xoffset_top = rc;\
+   newframe->Xoffset_top = rc;\
-     newframe->Xims = re;\
+   newframe->Xims = re;\
-     newframe->Xeptrb = rf;\
+   newframe->Xeptrb = rf;\
-     newframe->Xflags = rg;\
+   newframe->Xflags = rg;\
-     newframe->Xrdepth = frame->Xrdepth + 1;\
+   newframe->Xrdepth = frame->Xrdepth + 1;\
-     newframe->Xprevframe = frame;\
+   newframe->Xprevframe = frame;\
-     frame = newframe;\
+   frame = newframe;\
-     DPRINTF(("restarting from line %d\n", __LINE__));\
+   DPRINTF(("restarting from line %d\n", __LINE__));\
-     goto HEAP_RECURSE;\
+   goto HEAP_RECURSE;\
-     }\
+   L_##rw:\
-   else\
+   DPRINTF(("jumped back to line %d\n", __LINE__));\
-     {\
-     DPRINTF(("longjumped back to line %d\n", __LINE__));\
-     frame = md->thisframe;\
-     rx = frame->Xresult;\
-     }\
    }
  #define RRETURN(ra)\
-Line 254 
 match(), which never changes. */
+Line 282 
 match(), which never changes. */
    (pcre_stack_free)(newframe);\
    if (frame != NULL)\
      {\
-     frame->Xresult = ra;\
+     rrc = ra;\
-     md->thisframe = frame;\
+     goto HEAP_RETURN;\
-     longjmp(frame->Xwhere, 1);\
      }\
    return ra;\
    }
-Line 271 
 typedef struct heapframe {
+Line 298 
 typedef struct heapframe {
    const uschar *Xeptr;
    const uschar *Xecode;
+   const uschar *Xmstart;
    int Xoffset_top;
    long int Xims;
    eptrblock *Xeptrb;
    int Xflags;
-   int Xrdepth;
+   unsigned int Xrdepth;
    /* Function local variables */
-Line 291 
 typedef struct heapframe {
+Line 319 
 typedef struct heapframe {
    BOOL Xcur_is_word;
    BOOL Xcondition;
-   BOOL Xminimize;
    BOOL Xprev_is_word;
    unsigned long int Xoriginal_ims;
-Line 303 
 typedef struct heapframe {
+Line 330 
 typedef struct heapframe {
    int Xprop_category;
    int Xprop_chartype;
    int Xprop_script;
-   int *Xprop_test_variable;
+   int Xoclength;
+   uschar Xocchars[8];
  #endif
    int Xctype;
-   int Xfc;
+   unsigned int Xfc;
    int Xfi;
    int Xlength;
    int Xmax;
-Line 321 
 typedef struct heapframe {
+Line 349 
 typedef struct heapframe {
    eptrblock Xnewptrb;
-   /* Place to pass back result, and where to jump back to */
+   /* Where to jump back to */
-   int  Xresult;
+   int Xwhere;
-   jmp_buf Xwhere;
  } heapframe;
-Line 340 
 typedef struct heapframe {
+Line 367 
 typedef struct heapframe {
  *         Match from current position            *
  *************************************************/
- /* On entry ecode points to the first opcode, and eptr to the first character
+ /* This function is called recursively in many circumstances. Whenever it
- in the subject string, while eptrb holds the value of eptr at the start of the
- last bracketed group - used for breaking infinite loops matching zero-length
- strings. This function is called recursively in many circumstances. Whenever it
  returns a negative (error) response, the outer incarnation must also return the
  same response.
-Line 353 
 performance. Tests using gcc on a SPARC
+Line 377 
 performance. Tests using gcc on a SPARC
  made performance worse.
  Arguments:
-    eptr        pointer in subject
+    eptr        pointer to current character in subject
-    ecode       position in code
+    ecode       pointer to current position in compiled code
+    mstart      pointer to the current match start position (can be modified
+                  by encountering \K)
     offset_top  current top pointer
     md          pointer to "static" info for the match
     ims         current /i, /m, and /s options
-Line 362 
 Arguments:
+Line 388 
 Arguments:
                   brackets - for testing for empty matches
     flags       can contain
                   match_condassert - this is an assertion condition
-                  match_isgroup - this is the start of a bracketed group
+                  match_cbegroup - this is the start of an unlimited repeat
+                    group that can match an empty string
     rdepth      the recursion depth
  Returns:       MATCH_MATCH if matched            )  these values are >= 0
-Line 372 
 Returns:       MATCH_MATCH if matched
+Line 399 
 Returns:       MATCH_MATCH if matched
  */
  static int
- match(REGISTER USPTR eptr, REGISTER const uschar *ecode,
+ match(REGISTER USPTR eptr, REGISTER const uschar *ecode, const uschar *mstart,
    int offset_top, match_data *md, unsigned long int ims, eptrblock *eptrb,
-   int flags, int rdepth)
+   int flags, unsigned int rdepth)
  {
  /* These variables do not need to be preserved over recursion in this function,
- so they can be ordinary variables in all cases. Mark them with "register"
+ so they can be ordinary variables in all cases. Mark some of them with
- because they are used a lot in loops. */
+ "register" because they are used a lot in loops. */
+ register int  rrc;         /* Returns from recursive calls */
+ register int  i;           /* Used for loops not involving calls to RMATCH() */
+ register unsigned int c;   /* Character values not kept over RMATCH() calls */
+ register BOOL utf8;        /* Local copy of UTF-8 flag for speed */
- register int  rrc;    /* Returns from recursive calls */
+ BOOL minimize, possessive; /* Quantifier options */
- register int  i;      /* Used for loops not involving calls to RMATCH() */
- register int  c;      /* Character values not kept over RMATCH() calls */
- register BOOL utf8;   /* Local copy of UTF-8 flag for speed */
  /* When recursion is not being used, all "local" variables that have to be
  preserved over calls to RMATCH() are part of a "frame" which is obtained from
-Line 398 
 frame->Xprevframe = NULL;            /*
+Line 427 
 frame->Xprevframe = NULL;            /*
  frame->Xeptr = eptr;
  frame->Xecode = ecode;
+ frame->Xmstart = mstart;
  frame->Xoffset_top = offset_top;
  frame->Xims = ims;
  frame->Xeptrb = eptrb;
-Line 412 
 HEAP_RECURSE:
+Line 442 
 HEAP_RECURSE:
  #define eptr               frame->Xeptr
  #define ecode              frame->Xecode
+ #define mstart             frame->Xmstart
  #define offset_top         frame->Xoffset_top
  #define ims                frame->Xims
  #define eptrb              frame->Xeptrb
-Line 434 
 HEAP_RECURSE:
+Line 465 
 HEAP_RECURSE:
  #define cur_is_word        frame->Xcur_is_word
  #define condition          frame->Xcondition
- #define minimize           frame->Xminimize
  #define prev_is_word       frame->Xprev_is_word
  #define original_ims       frame->Xoriginal_ims
-Line 446 
 HEAP_RECURSE:
+Line 476 
 HEAP_RECURSE:
  #define prop_category      frame->Xprop_category
  #define prop_chartype      frame->Xprop_chartype
  #define prop_script        frame->Xprop_script
- #define prop_test_variable frame->Xprop_test_variable
+ #define oclength           frame->Xoclength
+ #define occhars            frame->Xocchars
  #endif
  #define ctype              frame->Xctype
-Line 470 
 HEAP_RECURSE:
+Line 501 
 HEAP_RECURSE:
  get preserved during recursion in the normal way. In this environment, fi and
  i, and fc and c, can be the same variables. */
- #else
+ #else         /* NO_RECURSE not defined */
  #define fi i
  #define fc c
-Line 489 
 recursion_info new_recursive;      /* wi
+Line 520 
 recursion_info new_recursive;      /* wi
                                     /* that do not have to be preserved over  */
  BOOL cur_is_word;                  /* a recursive call to RMATCH().          */
  BOOL condition;
- BOOL minimize;
  BOOL prev_is_word;
  unsigned long int original_ims;
-Line 501 
 int prop_fail_result;
+Line 531 
 int prop_fail_result;
  int prop_category;
  int prop_chartype;
  int prop_script;
- int *prop_test_variable;
+ int oclength;
+ uschar occhars[8];
  #endif
  int ctype;
-Line 516 
 int save_offset1, save_offset2, save_off
+Line 547 
 int save_offset1, save_offset2, save_off
  int stacksave[REC_STACK_SAVE_MAX];
  eptrblock newptrb;
- #endif
+ #endif     /* NO_RECURSE */
  /* These statements are here to stop the compiler complaining about unitialized
  variables. */
-Line 524 
 variables. */
+Line 555 
 variables. */
  #ifdef SUPPORT_UCP
  prop_value = 0;
  prop_fail_result = 0;
- prop_test_variable = NULL;
  #endif
+ /* This label is used for tail recursion, which is used in a few cases even
+ when NO_RECURSE is not defined, in order to reduce the amount of stack that is
+ used. Thanks to Ian Taylor for noticing this possibility and sending the
+ original patch. */
+ TAIL_RECURSE:
  /* OK, now we can get on with the real code of the function. Recursive calls
  are specified by the macro RMATCH and RRETURN is used to return. When
  NO_RECURSE is *not* defined, these just turn into a recursive call to match()
-Line 535 
 defined). However, RMATCH isn't like a f
+Line 573 
 defined). However, RMATCH isn't like a f
  complicated macro. It has to be used in one particular way. This shouldn't,
  however, impact performance when true recursion is being used. */
+ #ifdef SUPPORT_UTF8
+ utf8 = md->utf8;       /* Local copy of the flag */
+ #else
+ utf8 = FALSE;
+ #endif
  /* First check that we haven't called match() too many times, or that we
  haven't exceeded the recursive call limit. */
-Line 542 
 if (md->match_call_count++ >= md->match_
+Line 586 
 if (md->match_call_count++ >= md->match_
  if (rdepth >= md->match_limit_recursion) RRETURN(PCRE_ERROR_RECURSIONLIMIT);
  original_ims = ims;    /* Save for resetting on ')' */
- utf8 = md->utf8;       /* Local copy of the flag */
- /* At the start of a bracketed group, add the current subject pointer to the
+ /* At the start of a group with an unlimited repeat that may match an empty
- stack of such pointers, to be re-instated at the end of the group when we hit
+ string, the match_cbegroup flag is set. When this is the case, add the current
- the closing ket. When match() is called in other circumstances, we don't add to
+ subject pointer to the chain of such remembered pointers, to be checked when we
- this stack. */
+ hit the closing ket, in order to break infinite loops that match no characters.
+ When match() is called in other circumstances, don't add to the chain. The
+ match_cbegroup flag must NOT be used with tail recursion, because the memory
+ block that is used is on the stack, so a new one may be required for each
+ match(). */
- if ((flags & match_isgroup) != 0)
+ if ((flags & match_cbegroup) != 0)
    {
-   newptrb.epb_prev = eptrb;
    newptrb.epb_saved_eptr = eptr;
+   newptrb.epb_prev = eptrb;
    eptrb = &newptrb;
    }
- /* Now start processing the operations. */
+ /* Now start processing the opcodes. */
  for (;;)
    {
+   minimize = possessive = FALSE;
    op = *ecode;
-   minimize = FALSE;
    /* For partial matching, remember if we ever hit the end of the subject after
    matching at least one subject character. */
    if (md->partial &&
        eptr >= md->end_subject &&
-       eptr > md->start_match)
+       eptr > mstart)
      md->hitend = TRUE;
-   /* Opening capturing bracket. If there is space in the offset vector, save
+   switch(op)
-   the current subject position in the working slot at the top of the vector. We
-   mustn't change the current values of the data slot, because they may be set
-   from a previous iteration of this group, and be referred to by a reference
-   inside the group.
-   If the bracket fails to match, we need to restore this value and also the
-   values of the final offsets, in case they were set by a previous iteration of
-   the same bracket.
-   If there isn't enough space in the offset vector, treat this as if it were a
-   non-capturing bracket. Don't worry about setting the flag for the error case
-   here; that is handled in the code for KET. */
-   if (op > OP_BRA)
      {
-     number = op - OP_BRA;
+     case OP_FAIL:
+     RRETURN(MATCH_NOMATCH);
-     /* For extended extraction brackets (large number), we have to fish out the
-     number from a dummy opcode at the start. */
-     if (number > EXTRACT_BASIC_MAX)
+     case OP_PRUNE:
-       number = GET2(ecode, 2+LINK_SIZE);
+     RMATCH(eptr, ecode + _pcre_OP_lengths[*ecode], offset_top, md,
+       ims, eptrb, flags, RM51);
+     if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+     RRETURN(MATCH_PRUNE);
+     case OP_COMMIT:
+     RMATCH(eptr, ecode + _pcre_OP_lengths[*ecode], offset_top, md,
+       ims, eptrb, flags, RM52);
+     if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+     RRETURN(MATCH_COMMIT);
+     case OP_SKIP:
+     RMATCH(eptr, ecode + _pcre_OP_lengths[*ecode], offset_top, md,
+       ims, eptrb, flags, RM53);
+     if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+     md->start_match_ptr = eptr;   /* Pass back current position */
+     RRETURN(MATCH_SKIP);
+     case OP_THEN:
+     RMATCH(eptr, ecode + _pcre_OP_lengths[*ecode], offset_top, md,
+       ims, eptrb, flags, RM54);
+     if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+     RRETURN(MATCH_THEN);
+     /* Handle a capturing bracket. If there is space in the offset vector, save
+     the current subject position in the working slot at the top of the vector.
+     We mustn't change the current values of the data slot, because they may be
+     set from a previous iteration of this group, and be referred to by a
+     reference inside the group.
+     If the bracket fails to match, we need to restore this value and also the
+     values of the final offsets, in case they were set by a previous iteration
+     of the same bracket.
+     If there isn't enough space in the offset vector, treat this as if it were
+     a non-capturing bracket. Don't worry about setting the flag for the error
+     case here; that is handled in the code for KET. */
+     case OP_CBRA:
+     case OP_SCBRA:
+     number = GET2(ecode, 1+LINK_SIZE);
      offset = number << 1;
  #ifdef DEBUG
-     printf("start bracket %d subject=", number);
+     printf("start bracket %d\n", number);
+     printf("subject=");
      pchars(eptr, 16, TRUE, md);
      printf("\n");
  #endif
-Line 612 
 for (;;)
+Line 684 
 for (;;)
        DPRINTF(("saving %d %d %d\n", save_offset1, save_offset2, save_offset3));
        md->offset_vector[md->offset_end - number] = eptr - md->start_subject;
+       flags = (op == OP_SCBRA)? match_cbegroup : 0;
        do
          {
-         RMATCH(rrc, eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, eptrb,
+         RMATCH(eptr, ecode + _pcre_OP_lengths[*ecode], offset_top, md,
-           match_isgroup);
+           ims, eptrb, flags, RM1);
-         if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+         if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) RRETURN(rrc);
          md->capture_last = save_capture_last;
          ecode += GET(ecode, 1);
          }
-Line 631 
 for (;;)
+Line 704 
 for (;;)
        RRETURN(MATCH_NOMATCH);
        }
-     /* Insufficient room for saving captured contents */
+     /* FALL THROUGH ... Insufficient room for saving captured contents. Treat
+     as a non-capturing bracket. */
-     else op = OP_BRA;
+     /* VVVVVVVVVVVVVVVVVVVVVVVVV */
-     }
+     /* VVVVVVVVVVVVVVVVVVVVVVVVV */
-   /* Other types of node can be handled by a switch */
+     DPRINTF(("insufficient capture room: treat as non-capturing\n"));
-   switch(op)
+     /* VVVVVVVVVVVVVVVVVVVVVVVVV */
-     {
+     /* VVVVVVVVVVVVVVVVVVVVVVVVV */
-     case OP_BRA:     /* Non-capturing bracket: optimized */
-     DPRINTF(("start bracket 0\n"));
+     /* Non-capturing bracket. Loop for all the alternatives. When we get to the
-     do
+     final alternative within the brackets, we would return the result of a
+     recursive call to match() whatever happened. We can reduce stack usage by
+     turning this into a tail recursion, except in the case when match_cbegroup
+     is set.*/
+     case OP_BRA:
+     case OP_SBRA:
+     DPRINTF(("start non-capturing bracket\n"));
+     flags = (op >= OP_SBRA)? match_cbegroup : 0;
+     for (;;)
        {
-       RMATCH(rrc, eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, eptrb,
+       if (ecode[GET(ecode, 1)] != OP_ALT)   /* Final alternative */
-         match_isgroup);
+         {
-       if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+         if (flags == 0)    /* Not a possibly empty group */
+           {
+           ecode += _pcre_OP_lengths[*ecode];
+           DPRINTF(("bracket 0 tail recursion\n"));
+           goto TAIL_RECURSE;
+           }
+         /* Possibly empty group; can't use tail recursion. */
+         RMATCH(eptr, ecode + _pcre_OP_lengths[*ecode], offset_top, md, ims,
+           eptrb, flags, RM48);
+         RRETURN(rrc);
+         }
+       /* For non-final alternatives, continue the loop for a NOMATCH result;
+       otherwise return. */
+       RMATCH(eptr, ecode + _pcre_OP_lengths[*ecode], offset_top, md, ims,
+         eptrb, flags, RM2);
+       if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) RRETURN(rrc);
        ecode += GET(ecode, 1);
        }
-     while (*ecode == OP_ALT);
+     /* Control never reaches here. */
-     DPRINTF(("bracket 0 failed\n"));
-     RRETURN(MATCH_NOMATCH);
      /* Conditional group: compilation checked that there are no more than
      two branches. If the condition is false, skipping the first branch takes us
      past the end if there is only one branch, but that's OK because that is
-     exactly what going to the ket would do. */
+     exactly what going to the ket would do. As there is only one branch to be
+     obeyed, we can use tail recursion to avoid using another stack frame. */
      case OP_COND:
-     if (ecode[LINK_SIZE+1] == OP_CREF) /* Condition extract or recurse test */
+     case OP_SCOND:
+     if (ecode[LINK_SIZE+1] == OP_RREF)         /* Recursion test */
+       {
+       offset = GET2(ecode, LINK_SIZE + 2);     /* Recursion group number*/
+       condition = md->recursive != NULL &&
+         (offset == RREF_ANY || offset == md->recursive->group_num);
+       ecode += condition? 3 : GET(ecode, 1);
+       }
+     else if (ecode[LINK_SIZE+1] == OP_CREF)    /* Group used test */
        {
        offset = GET2(ecode, LINK_SIZE+2) << 1;  /* Doubled ref number */
-       condition = (offset == CREF_RECURSE * 2)?
+       condition = offset < offset_top && md->offset_vector[offset] >= 0;
-         (md->recursive != NULL) :
+       ecode += condition? 3 : GET(ecode, 1);
-         (offset < offset_top && md->offset_vector[offset] >= 0);
+       }
-       RMATCH(rrc, eptr, ecode + (condition?
-         (LINK_SIZE + 4) : (LINK_SIZE + 1 + GET(ecode, 1))),
+     else if (ecode[LINK_SIZE+1] == OP_DEF)     /* DEFINE - always false */
-         offset_top, md, ims, eptrb, match_isgroup);
+       {
-       RRETURN(rrc);
+       condition = FALSE;
+       ecode += GET(ecode, 1);
        }
      /* The condition is an assertion. Call match() to evaluate it - setting
-     the final argument TRUE causes it to stop at the end of an assertion. */
+     the final argument match_condassert causes it to stop at the end of an
+     assertion. */
      else
        {
-       RMATCH(rrc, eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, NULL,
+       RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, NULL,
-           match_condassert | match_isgroup);
+           match_condassert, RM3);
        if (rrc == MATCH_MATCH)
          {
-         ecode += 1 + LINK_SIZE + GET(ecode, LINK_SIZE+2);
+         condition = TRUE;
+         ecode += 1 + LINK_SIZE + GET(ecode, LINK_SIZE + 2);
          while (*ecode == OP_ALT) ecode += GET(ecode, 1);
          }
-       else if (rrc != MATCH_NOMATCH)
+       else if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN)
          {
          RRETURN(rrc);         /* Need braces because of following else */
          }
-       else ecode += GET(ecode, 1);
+       else
-       RMATCH(rrc, eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, eptrb,
+         {
-         match_isgroup);
+         condition = FALSE;
-       RRETURN(rrc);
+         ecode += GET(ecode, 1);
+         }
        }
-     /* Control never reaches here */
-     /* Skip over conditional reference or large extraction number data if
+     /* We are now at the branch that is to be obeyed. As there is only one,
-     encountered. */
+     we can use tail recursion to avoid using another stack frame, except when
+     match_cbegroup is required for an unlimited repeat of a possibly empty
+     group. If the second alternative doesn't exist, we can just plough on. */
-     case OP_CREF:
+     if (condition || *ecode == OP_ALT)
-     case OP_BRANUMBER:
+       {
-     ecode += 3;
+       ecode += 1 + LINK_SIZE;
+       if (op == OP_SCOND)        /* Possibly empty group */
+         {
+         RMATCH(eptr, ecode, offset_top, md, ims, eptrb, match_cbegroup, RM49);
+         RRETURN(rrc);
+         }
+       else                       /* Group must match something */
+         {
+         flags = 0;
+         goto TAIL_RECURSE;
+         }
+       }
+     else                         /* Condition false & no 2nd alternative */
+       {
+       ecode += 1 + LINK_SIZE;
+       }
      break;
-     /* End of the pattern. If we are in a recursion, we should restore the
-     offsets appropriately and continue from after the call. */
+     /* End of the pattern, either real or forced. If we are in a top-level
+     recursion, we should restore the offsets appropriately and continue from
+     after the call. */
+     case OP_ACCEPT:
      case OP_END:
      if (md->recursive != NULL && md->recursive->group_num == 0)
        {
-Line 713 
 for (;;)
+Line 846 
 for (;;)
        md->recursive = rec->prevrec;
        memmove(md->offset_vector, rec->offset_save,
          rec->saved_max * sizeof(int));
-       md->start_match = rec->save_start;
+       mstart = rec->save_start;
        ims = original_ims;
        ecode = rec->after_call;
        break;
-Line 722 
 for (;;)
+Line 855 
 for (;;)
      /* Otherwise, if PCRE_NOTEMPTY is set, fail if we have matched an empty
      string - backtracking will then try other alternatives, if any. */
-     if (md->notempty && eptr == md->start_match) RRETURN(MATCH_NOMATCH);
+     if (md->notempty && eptr == mstart) RRETURN(MATCH_NOMATCH);
-     md->end_match_ptr = eptr;          /* Record where we ended */
+     md->end_match_ptr = eptr;           /* Record where we ended */
-     md->end_offset_top = offset_top;   /* and how many extracts were taken */
+     md->end_offset_top = offset_top;    /* and how many extracts were taken */
+     md->start_match_ptr = mstart;       /* and the start (\K can modify) */
      RRETURN(MATCH_MATCH);
      /* Change option settings */
-Line 745 
 for (;;)
+Line 879 
 for (;;)
      case OP_ASSERTBACK:
      do
        {
-       RMATCH(rrc, eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, NULL,
+       RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, NULL, 0,
-         match_isgroup);
+         RM4);
        if (rrc == MATCH_MATCH) break;
-       if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+       if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) RRETURN(rrc);
        ecode += GET(ecode, 1);
        }
      while (*ecode == OP_ALT);
-Line 772 
 for (;;)
+Line 906 
 for (;;)
      case OP_ASSERTBACK_NOT:
      do
        {
-       RMATCH(rrc, eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, NULL,
+       RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, NULL, 0,
-         match_isgroup);
+         RM5);
        if (rrc == MATCH_MATCH) RRETURN(MATCH_NOMATCH);
-       if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+       if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) RRETURN(rrc);
        ecode += GET(ecode,1);
        }
      while (*ecode == OP_ALT);
-Line 794 
 for (;;)
+Line 928 
 for (;;)
  #ifdef SUPPORT_UTF8
      if (utf8)
        {
-       c = GET(ecode,1);
+       i = GET(ecode, 1);
-       for (i = 0; i < c; i++)
+       while (i-- > 0)
          {
          eptr--;
          if (eptr < md->start_subject) RRETURN(MATCH_NOMATCH);
-         BACKCHAR(eptr)
+         BACKCHAR(eptr);
          }
        }
      else
-Line 808 
 for (;;)
+Line 942 
 for (;;)
      /* No UTF-8 support, or not in UTF-8 mode: count is byte count */
        {
-       eptr -= GET(ecode,1);
+       eptr -= GET(ecode, 1);
        if (eptr < md->start_subject) RRETURN(MATCH_NOMATCH);
        }
-Line 830 
 for (;;)
+Line 964 
 for (;;)
        cb.offset_vector    = md->offset_vector;
        cb.subject          = (PCRE_SPTR)md->start_subject;
        cb.subject_length   = md->end_subject - md->start_subject;
-       cb.start_match      = md->start_match - md->start_subject;
+       cb.start_match      = mstart - md->start_subject;
        cb.current_position = eptr - md->start_subject;
        cb.pattern_position = GET(ecode, 2);
        cb.next_item_length = GET(ecode, 2 + LINK_SIZE);
-Line 865 
 for (;;)
+Line 999 
 for (;;)
      case OP_RECURSE:
        {
        callpat = md->start_code + GET(ecode, 1);
-       new_recursive.group_num = *callpat - OP_BRA;
+       new_recursive.group_num = (callpat == md->start_code)? 0 :
+         GET2(callpat, 1 + LINK_SIZE);
-       /* For extended extraction brackets (large number), we have to fish out
-       the number from a dummy opcode at the start. */
-       if (new_recursive.group_num > EXTRACT_BASIC_MAX)
-         new_recursive.group_num = GET2(callpat, 2+LINK_SIZE);
        /* Add to "recursing stack" */
-Line 897 
 for (;;)
+Line 1026 
 for (;;)
        memcpy(new_recursive.offset_save, md->offset_vector,
              new_recursive.saved_max * sizeof(int));
-       new_recursive.save_start = md->start_match;
+       new_recursive.save_start = mstart;
-       md->start_match = eptr;
+       mstart = eptr;
        /* OK, now we can do the recursion. For each top-level alternative we
        restore the offset and recursion data. */
        DPRINTF(("Recursing into group %d\n", new_recursive.group_num));
+       flags = (*callpat >= OP_SBRA)? match_cbegroup : 0;
        do
          {
-         RMATCH(rrc, eptr, callpat + 1 + LINK_SIZE, offset_top, md, ims,
+         RMATCH(eptr, callpat + _pcre_OP_lengths[*callpat], offset_top,
-             eptrb, match_isgroup);
+           md, ims, eptrb, flags, RM6);
          if (rrc == MATCH_MATCH)
            {
            DPRINTF(("Recursion matched\n"));
-Line 916 
 for (;;)
+Line 1046 
 for (;;)
              (pcre_free)(new_recursive.offset_save);
            RRETURN(MATCH_MATCH);
            }
-         else if (rrc != MATCH_NOMATCH)
+         else if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN)
            {
            DPRINTF(("Recursion gave error %d\n", rrc));
            RRETURN(rrc);
-Line 945 
 for (;;)
+Line 1075 
 for (;;)
      the end of a normal bracket, leaving the subject pointer. */
      case OP_ONCE:
-       {
+     prev = ecode;
-       prev = ecode;
+     saved_eptr = eptr;
-       saved_eptr = eptr;
-       do
+     do
-         {
+       {
-         RMATCH(rrc, eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims,
+       RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, eptrb, 0, RM7);
-           eptrb, match_isgroup);
+       if (rrc == MATCH_MATCH) break;
-         if (rrc == MATCH_MATCH) break;
+       if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) RRETURN(rrc);
-         if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+       ecode += GET(ecode,1);
-         ecode += GET(ecode,1);
+       }
-         }
+     while (*ecode == OP_ALT);
-       while (*ecode == OP_ALT);
-       /* If hit the end of the group (which could be repeated), fail */
+     /* If hit the end of the group (which could be repeated), fail */
-       if (*ecode != OP_ONCE && *ecode != OP_ALT) RRETURN(MATCH_NOMATCH);
+     if (*ecode != OP_ONCE && *ecode != OP_ALT) RRETURN(MATCH_NOMATCH);
-       /* Continue as from after the assertion, updating the offsets high water
+     /* Continue as from after the assertion, updating the offsets high water
-       mark, since extracts may have been taken. */
+     mark, since extracts may have been taken. */
-       do ecode += GET(ecode,1); while (*ecode == OP_ALT);
+     do ecode += GET(ecode, 1); while (*ecode == OP_ALT);
-       offset_top = md->end_offset_top;
+     offset_top = md->end_offset_top;
-       eptr = md->end_match_ptr;
+     eptr = md->end_match_ptr;
-       /* For a non-repeating ket, just continue at this level. This also
+     /* For a non-repeating ket, just continue at this level. This also
-       happens for a repeating ket if no characters were matched in the group.
+     happens for a repeating ket if no characters were matched in the group.
-       This is the forcible breaking of infinite loops as implemented in Perl
+     This is the forcible breaking of infinite loops as implemented in Perl
 .005. If there is an options reset, it will get obeyed in the normal
-       course of events. */
+     course of events. */
-       if (*ecode == OP_KET || eptr == saved_eptr)
+     if (*ecode == OP_KET || eptr == saved_eptr)
-         {
+       {
-         ecode += 1+LINK_SIZE;
+       ecode += 1+LINK_SIZE;
-         break;
+       break;
-         }
+       }
-       /* The repeating kets try the rest of the pattern or restart from the
+     /* The repeating kets try the rest of the pattern or restart from the
-       preceding bracket, in the appropriate order. We need to reset any options
+     preceding bracket, in the appropriate order. The second "call" of match()
-       that changed within the bracket before re-running it, so check the next
+     uses tail recursion, to avoid using another stack frame. We need to reset
-       opcode. */
+     any options that changed within the bracket before re-running it, so
+     check the next opcode. */
-       if (ecode[1+LINK_SIZE] == OP_OPT)
+     if (ecode[1+LINK_SIZE] == OP_OPT)
-         {
+       {
-         ims = (ims & ~PCRE_IMS) | ecode[4];
+       ims = (ims & ~PCRE_IMS) | ecode[4];
-         DPRINTF(("ims set to %02lx at group repeat\n", ims));
+       DPRINTF(("ims set to %02lx at group repeat\n", ims));
-         }
+       }
-       if (*ecode == OP_KETRMIN)
+     if (*ecode == OP_KETRMIN)
-         {
+       {
-         RMATCH(rrc, eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, eptrb, 0);
+       RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, eptrb, 0, RM8);
-         if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+       if (rrc != MATCH_NOMATCH) RRETURN(rrc);
-         RMATCH(rrc, eptr, prev, offset_top, md, ims, eptrb, match_isgroup);
+       ecode = prev;
-         if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+       flags = 0;
-         }
+       goto TAIL_RECURSE;
-       else  /* OP_KETRMAX */
-         {
-         RMATCH(rrc, eptr, prev, offset_top, md, ims, eptrb, match_isgroup);
-         if (rrc != MATCH_NOMATCH) RRETURN(rrc);
-         RMATCH(rrc, eptr, ecode + 1+LINK_SIZE, offset_top, md, ims, eptrb, 0);
-         if (rrc != MATCH_NOMATCH) RRETURN(rrc);
-         }
        }
-     RRETURN(MATCH_NOMATCH);
+     else  /* OP_KETRMAX */
+       {
+       RMATCH(eptr, prev, offset_top, md, ims, eptrb, match_cbegroup, RM9);
+       if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+       ecode += 1 + LINK_SIZE;
+       flags = 0;
+       goto TAIL_RECURSE;
+       }
+     /* Control never gets here */
      /* An alternation is the end of a branch; scan along to find the end of the
      bracketed group and go to there. */
-Line 1027 
 for (;;)
+Line 1157 
 for (;;)
      case OP_BRAZERO:
        {
        next = ecode+1;
-       RMATCH(rrc, eptr, next, offset_top, md, ims, eptrb, match_isgroup);
+       RMATCH(eptr, next, offset_top, md, ims, eptrb, 0, RM10);
        if (rrc != MATCH_NOMATCH) RRETURN(rrc);
        do next += GET(next,1); while (*next == OP_ALT);
-       ecode = next + 1+LINK_SIZE;
+       ecode = next + 1 + LINK_SIZE;
        }
      break;
      case OP_BRAMINZERO:
        {
        next = ecode+1;
-       do next += GET(next,1); while (*next == OP_ALT);
+       do next += GET(next, 1); while (*next == OP_ALT);
-       RMATCH(rrc, eptr, next + 1+LINK_SIZE, offset_top, md, ims, eptrb,
+       RMATCH(eptr, next + 1+LINK_SIZE, offset_top, md, ims, eptrb, 0, RM11);
-         match_isgroup);
        if (rrc != MATCH_NOMATCH) RRETURN(rrc);
        ecode++;
        }
      break;
-     /* End of a group, repeated or non-repeating. If we are at the end of
+     /* End of a group, repeated or non-repeating. */
-     an assertion "group", stop matching and return MATCH_MATCH, but record the
-     current high water mark for use by positive assertions. Do this also
-     for the "once" (not-backup up) groups. */
      case OP_KET:
      case OP_KETRMIN:
      case OP_KETRMAX:
-       {
+     prev = ecode - GET(ecode, 1);
-       prev = ecode - GET(ecode, 1);
-       saved_eptr = eptrb->epb_saved_eptr;
-       /* Back up the stack of bracket start pointers. */
+     /* If this was a group that remembered the subject start, in order to break
+     infinite repeats of empty string matches, retrieve the subject start from
+     the chain. Otherwise, set it NULL. */
-       eptrb = eptrb->epb_prev;
+     if (*prev >= OP_SBRA)
+       {
-       if (*prev == OP_ASSERT || *prev == OP_ASSERT_NOT ||
+       saved_eptr = eptrb->epb_saved_eptr;   /* Value at start of group */
-           *prev == OP_ASSERTBACK || *prev == OP_ASSERTBACK_NOT ||
+       eptrb = eptrb->epb_prev;              /* Backup to previous group */
-           *prev == OP_ONCE)
+       }
-         {
+     else saved_eptr = NULL;
-         md->end_match_ptr = eptr;      /* For ONCE */
-         md->end_offset_top = offset_top;
-         RRETURN(MATCH_MATCH);
-         }
-       /* In all other cases except a conditional group we have to check the
+     /* If we are at the end of an assertion group, stop matching and return
-       group number back at the start and if necessary complete handling an
+     MATCH_MATCH, but record the current high water mark for use by positive
-       extraction by setting the offsets and bumping the high water mark. */
+     assertions. Do this also for the "once" (atomic) groups. */
-       if (*prev != OP_COND)
+     if (*prev == OP_ASSERT || *prev == OP_ASSERT_NOT ||
-         {
+         *prev == OP_ASSERTBACK || *prev == OP_ASSERTBACK_NOT ||
-         number = *prev - OP_BRA;
+         *prev == OP_ONCE)
+       {
+       md->end_match_ptr = eptr;      /* For ONCE */
+       md->end_offset_top = offset_top;
+       RRETURN(MATCH_MATCH);
+       }
-         /* For extended extraction brackets (large number), we have to fish out
+     /* For capturing groups we have to check the group number back at the start
-         the number from a dummy opcode at the start. */
+     and if necessary complete handling an extraction by setting the offsets and
+     bumping the high water mark. Note that whole-pattern recursion is coded as
+     a recurse into group 0, so it won't be picked up here. Instead, we catch it
+     when the OP_END is reached. Other recursion is handled here. */
-         if (number > EXTRACT_BASIC_MAX) number = GET2(prev, 2+LINK_SIZE);
+     if (*prev == OP_CBRA || *prev == OP_SCBRA)
-         offset = number << 1;
+       {
+       number = GET2(prev, 1+LINK_SIZE);
+       offset = number << 1;
  #ifdef DEBUG
-         printf("end bracket %d", number);
+       printf("end bracket %d", number);
-         printf("\n");
+       printf("\n");
  #endif
-         /* Test for a numbered group. This includes groups called as a result
+       md->capture_last = number;
-         of recursion. Note that whole-pattern recursion is coded as a recurse
+       if (offset >= md->offset_max) md->offset_overflow = TRUE; else
-         into group 0, so it won't be picked up here. Instead, we catch it when
+         {
-         the OP_END is reached. */
+         md->offset_vector[offset] =
+           md->offset_vector[md->offset_end - number];
-         if (number > 0)
+         md->offset_vector[offset+1] = eptr - md->start_subject;
-           {
+         if (offset_top <= offset) offset_top = offset + 2;
-           md->capture_last = number;
+         }
-           if (offset >= md->offset_max) md->offset_overflow = TRUE; else
-             {
-             md->offset_vector[offset] =
-               md->offset_vector[md->offset_end - number];
-             md->offset_vector[offset+1] = eptr - md->start_subject;
-             if (offset_top <= offset) offset_top = offset + 2;
-             }
-           /* Handle a recursively called group. Restore the offsets
+       /* Handle a recursively called group. Restore the offsets
-           appropriately and continue from after the call. */
+       appropriately and continue from after the call. */
-           if (md->recursive != NULL && md->recursive->group_num == number)
+       if (md->recursive != NULL && md->recursive->group_num == number)
-             {
+         {
-             recursion_info *rec = md->recursive;
+         recursion_info *rec = md->recursive;
-             DPRINTF(("Recursion (%d) succeeded - continuing\n", number));
+         DPRINTF(("Recursion (%d) succeeded - continuing\n", number));
-             md->recursive = rec->prevrec;
+         md->recursive = rec->prevrec;
-             md->start_match = rec->save_start;
+         mstart = rec->save_start;
-             memcpy(md->offset_vector, rec->offset_save,
+         memcpy(md->offset_vector, rec->offset_save,
-               rec->saved_max * sizeof(int));
+           rec->saved_max * sizeof(int));
-             ecode = rec->after_call;
+         ecode = rec->after_call;
-             ims = original_ims;
+         ims = original_ims;
-             break;
+         break;
-             }
-           }
          }
+       }
-       /* Reset the value of the ims flags, in case they got changed during
+     /* For both capturing and non-capturing groups, reset the value of the ims
-       the group. */
+     flags, in case they got changed during the group. */
-       ims = original_ims;
+     ims = original_ims;
-       DPRINTF(("ims reset to %02lx\n", ims));
+     DPRINTF(("ims reset to %02lx\n", ims));
-       /* For a non-repeating ket, just continue at this level. This also
+     /* For a non-repeating ket, just continue at this level. This also
-       happens for a repeating ket if no characters were matched in the group.
+     happens for a repeating ket if no characters were matched in the group.
-       This is the forcible breaking of infinite loops as implemented in Perl
+     This is the forcible breaking of infinite loops as implemented in Perl
 .005. If there is an options reset, it will get obeyed in the normal
-       course of events. */
+     course of events. */
-       if (*ecode == OP_KET || eptr == saved_eptr)
+     if (*ecode == OP_KET || eptr == saved_eptr)
-         {
+       {
-         ecode += 1 + LINK_SIZE;
+       ecode += 1 + LINK_SIZE;
-         break;
+       break;
-         }
+       }
-       /* The repeating kets try the rest of the pattern or restart from the
+     /* The repeating kets try the rest of the pattern or restart from the
-       preceding bracket, in the appropriate order. */
+     preceding bracket, in the appropriate order. In the second case, we can use
+     tail recursion to avoid using another stack frame, unless we have an
+     unlimited repeat of a group that can match an empty string. */
-       if (*ecode == OP_KETRMIN)
+     flags = (*prev >= OP_SBRA)? match_cbegroup : 0;
-         {
-         RMATCH(rrc, eptr, ecode + 1+LINK_SIZE, offset_top, md, ims, eptrb, 0);
+     if (*ecode == OP_KETRMIN)
-         if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+       {
-         RMATCH(rrc, eptr, prev, offset_top, md, ims, eptrb, match_isgroup);
+       RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, eptrb, 0, RM12);
-         if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+       if (rrc != MATCH_NOMATCH) RRETURN(rrc);
-         }
+       if (flags != 0)    /* Could match an empty string */
-       else  /* OP_KETRMAX */
          {
-         RMATCH(rrc, eptr, prev, offset_top, md, ims, eptrb, match_isgroup);
+         RMATCH(eptr, prev, offset_top, md, ims, eptrb, flags, RM50);
-         if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+         RRETURN(rrc);
-         RMATCH(rrc, eptr, ecode + 1+LINK_SIZE, offset_top, md, ims, eptrb, 0);
-         if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          }
+       ecode = prev;
+       goto TAIL_RECURSE;
        }
+     else  /* OP_KETRMAX */
-     RRETURN(MATCH_NOMATCH);
+       {
+       RMATCH(eptr, prev, offset_top, md, ims, eptrb, flags, RM13);
+       if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+       ecode += 1 + LINK_SIZE;
+       flags = 0;
+       goto TAIL_RECURSE;
+       }
+     /* Control never gets here */
      /* Start of subject unless notbol, or after internal newline if multiline */
-Line 1168 
 for (;;)
+Line 1300 
 for (;;)
      if (md->notbol && eptr == md->start_subject) RRETURN(MATCH_NOMATCH);
      if ((ims & PCRE_MULTILINE) != 0)
        {
-       if (eptr != md->start_subject && eptr[-1] != NEWLINE)
+       if (eptr != md->start_subject &&
+           (eptr == md->end_subject || !WAS_NEWLINE(eptr)))
          RRETURN(MATCH_NOMATCH);
        ecode++;
        break;
-Line 1189 
 for (;;)
+Line 1322 
 for (;;)
      ecode++;
      break;
+     /* Reset the start of match point */
+     case OP_SET_SOM:
+     mstart = eptr;
+     ecode++;
+     break;
      /* Assert before internal newline if multiline, or before a terminating
      newline unless endonly is set, else end of subject unless noteol is set. */
-Line 1196 
 for (;;)
+Line 1336 
 for (;;)
      if ((ims & PCRE_MULTILINE) != 0)
        {
        if (eptr < md->end_subject)
-         { if (*eptr != NEWLINE) RRETURN(MATCH_NOMATCH); }
+         { if (!IS_NEWLINE(eptr)) RRETURN(MATCH_NOMATCH); }
        else
          { if (md->noteol) RRETURN(MATCH_NOMATCH); }
        ecode++;
-Line 1207 
 for (;;)
+Line 1347 
 for (;;)
        if (md->noteol) RRETURN(MATCH_NOMATCH);
        if (!md->endonly)
          {
-         if (eptr < md->end_subject - 1 ||
+         if (eptr != md->end_subject &&
-            (eptr == md->end_subject - 1 && *eptr != NEWLINE))
+             (!IS_NEWLINE(eptr) || eptr != md->end_subject - md->nllen))
            RRETURN(MATCH_NOMATCH);
          ecode++;
          break;
          }
        }
-     /* ... else fall through */
+     /* ... else fall through for endonly */
      /* End of subject assertion (\z) */
-Line 1226 
 for (;;)
+Line 1366 
 for (;;)
      /* End of subject or ending \n assertion (\Z) */
      case OP_EODN:
-     if (eptr < md->end_subject - 1 ||
+     if (eptr != md->end_subject &&
-        (eptr == md->end_subject - 1 && *eptr != NEWLINE)) RRETURN(MATCH_NOMATCH);
+         (!IS_NEWLINE(eptr) || eptr != md->end_subject - md->nllen))
+       RRETURN(MATCH_NOMATCH);
      ecode++;
      break;
-Line 1280 
 for (;;)
+Line 1421 
 for (;;)
      /* Match a single character type; inline for speed */
      case OP_ANY:
-     if ((ims & PCRE_DOTALL) == 0 && eptr < md->end_subject && *eptr == NEWLINE)
+     if ((ims & PCRE_DOTALL) == 0)
-       RRETURN(MATCH_NOMATCH);
+       {
+       if (IS_NEWLINE(eptr)) RRETURN(MATCH_NOMATCH);
+       }
      if (eptr++ >= md->end_subject) RRETURN(MATCH_NOMATCH);
- #ifdef SUPPORT_UTF8
      if (utf8)
        while (eptr < md->end_subject && (*eptr & 0xc0) == 0x80) eptr++;
- #endif
      ecode++;
      break;
-Line 1376 
 for (;;)
+Line 1517 
 for (;;)
      ecode++;
      break;
+     case OP_ANYNL:
+     if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+     GETCHARINCTEST(c, eptr);
+     switch(c)
+       {
+       default: RRETURN(MATCH_NOMATCH);
+       case 0x000d:
+       if (eptr < md->end_subject && *eptr == 0x0a) eptr++;
+       break;
+       case 0x000a:
+       break;
+       case 0x000b:
+       case 0x000c:
+       case 0x0085:
+       case 0x2028:
+       case 0x2029:
+       if (md->bsr_anycrlf) RRETURN(MATCH_NOMATCH);
+       break;
+       }
+     ecode++;
+     break;
+     case OP_NOT_HSPACE:
+     if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+     GETCHARINCTEST(c, eptr);
+     switch(c)
+       {
+       default: break;
+       case 0x09:      /* HT */
+       case 0x20:      /* SPACE */
+       case 0xa0:      /* NBSP */
+       case 0x1680:    /* OGHAM SPACE MARK */
+       case 0x180e:    /* MONGOLIAN VOWEL SEPARATOR */
+       case 0x2000:    /* EN QUAD */
+       case 0x2001:    /* EM QUAD */
+       case 0x2002:    /* EN SPACE */
+       case 0x2003:    /* EM SPACE */
+       case 0x2004:    /* THREE-PER-EM SPACE */
+       case 0x2005:    /* FOUR-PER-EM SPACE */
+       case 0x2006:    /* SIX-PER-EM SPACE */
+       case 0x2007:    /* FIGURE SPACE */
+       case 0x2008:    /* PUNCTUATION SPACE */
+       case 0x2009:    /* THIN SPACE */
+       case 0x200A:    /* HAIR SPACE */
+       case 0x202f:    /* NARROW NO-BREAK SPACE */
+       case 0x205f:    /* MEDIUM MATHEMATICAL SPACE */
+       case 0x3000:    /* IDEOGRAPHIC SPACE */
+       RRETURN(MATCH_NOMATCH);
+       }
+     ecode++;
+     break;
+     case OP_HSPACE:
+     if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+     GETCHARINCTEST(c, eptr);
+     switch(c)
+       {
+       default: RRETURN(MATCH_NOMATCH);
+       case 0x09:      /* HT */
+       case 0x20:      /* SPACE */
+       case 0xa0:      /* NBSP */
+       case 0x1680:    /* OGHAM SPACE MARK */
+       case 0x180e:    /* MONGOLIAN VOWEL SEPARATOR */
+       case 0x2000:    /* EN QUAD */
+       case 0x2001:    /* EM QUAD */
+       case 0x2002:    /* EN SPACE */
+       case 0x2003:    /* EM SPACE */
+       case 0x2004:    /* THREE-PER-EM SPACE */
+       case 0x2005:    /* FOUR-PER-EM SPACE */
+       case 0x2006:    /* SIX-PER-EM SPACE */
+       case 0x2007:    /* FIGURE SPACE */
+       case 0x2008:    /* PUNCTUATION SPACE */
+       case 0x2009:    /* THIN SPACE */
+       case 0x200A:    /* HAIR SPACE */
+       case 0x202f:    /* NARROW NO-BREAK SPACE */
+       case 0x205f:    /* MEDIUM MATHEMATICAL SPACE */
+       case 0x3000:    /* IDEOGRAPHIC SPACE */
+       break;
+       }
+     ecode++;
+     break;
+     case OP_NOT_VSPACE:
+     if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+     GETCHARINCTEST(c, eptr);
+     switch(c)
+       {
+       default: break;
+       case 0x0a:      /* LF */
+       case 0x0b:      /* VT */
+       case 0x0c:      /* FF */
+       case 0x0d:      /* CR */
+       case 0x85:      /* NEL */
+       case 0x2028:    /* LINE SEPARATOR */
+       case 0x2029:    /* PARAGRAPH SEPARATOR */
+       RRETURN(MATCH_NOMATCH);
+       }
+     ecode++;
+     break;
+     case OP_VSPACE:
+     if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+     GETCHARINCTEST(c, eptr);
+     switch(c)
+       {
+       default: RRETURN(MATCH_NOMATCH);
+       case 0x0a:      /* LF */
+       case 0x0b:      /* VT */
+       case 0x0c:      /* FF */
+       case 0x0d:      /* CR */
+       case 0x85:      /* NEL */
+       case 0x2028:    /* LINE SEPARATOR */
+       case 0x2029:    /* PARAGRAPH SEPARATOR */
+       break;
+       }
+     ecode++;
+     break;
  #ifdef SUPPORT_UCP
      /* Check the next character by Unicode property. We will get here only
      if the support is in the binary; otherwise a compile-time error occurs. */
-Line 1418 
 for (;;)
+Line 1679 
 for (;;)
          default:
          RRETURN(PCRE_ERROR_INTERNAL);
-         break;
          }
        ecode += 3;
-Line 1532 
 for (;;)
+Line 1792 
 for (;;)
          {
          for (fi = min;; fi++)
            {
-           RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+           RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM14);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max || !match_ref(offset, eptr, length, md, ims))
              RRETURN(MATCH_NOMATCH);
-Line 1553 
 for (;;)
+Line 1813 
 for (;;)
            }
          while (eptr >= pp)
            {
-           RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+           RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM15);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            eptr -= length;
            }
-Line 1658 
 for (;;)
+Line 1918 
 for (;;)
            {
            for (fi = min;; fi++)
              {
-             RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+             RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM16);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
              GETCHARINC(c, eptr);
-Line 1678 
 for (;;)
+Line 1938 
 for (;;)
            {
            for (fi = min;; fi++)
              {
-             RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+             RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM17);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
              c = *eptr++;
-Line 1715 
 for (;;)
+Line 1975 
 for (;;)
              }
            for (;;)
              {
-             RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+             RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM18);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (eptr-- == pp) break;        /* Stop if tried at original pos */
              BACKCHAR(eptr);
-Line 1734 
 for (;;)
+Line 1994 
 for (;;)
              }
            while (eptr >= pp)
              {
-             RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+             RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM19);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              eptr--;
              }
-Line 1805 
 for (;;)
+Line 2065 
 for (;;)
          {
          for (fi = min;; fi++)
            {
-           RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+           RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM20);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
            GETCHARINC(c, eptr);
-Line 1829 
 for (;;)
+Line 2089 
 for (;;)
            }
          for(;;)
            {
-           RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+           RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM21);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (eptr-- == pp) break;        /* Stop if tried at original pos */
-           BACKCHAR(eptr)
+           if (utf8) BACKCHAR(eptr);
            }
          RRETURN(MATCH_NOMATCH);
          }
-Line 1888 
 for (;;)
+Line 2148 
 for (;;)
        else
          {
-         int dc;
+         unsigned int dc;
          GETCHARINC(dc, eptr);
          ecode += length;
-Line 1915 
 for (;;)
+Line 2175 
 for (;;)
        }
      break;
-     /* Match a single character repeatedly; different opcodes share code. */
+     /* Match a single character repeatedly. */
      case OP_EXACT:
      min = max = GET2(ecode, 1);
      ecode += 3;
      goto REPEATCHAR;
+     case OP_POSUPTO:
+     possessive = TRUE;
+     /* Fall through */
      case OP_UPTO:
      case OP_MINUPTO:
      min = 0;
-Line 1930 
 for (;;)
+Line 2194 
 for (;;)
      ecode += 3;
      goto REPEATCHAR;
+     case OP_POSSTAR:
+     possessive = TRUE;
+     min = 0;
+     max = INT_MAX;
+     ecode++;
+     goto REPEATCHAR;
+     case OP_POSPLUS:
+     possessive = TRUE;
+     min = 1;
+     max = INT_MAX;
+     ecode++;
+     goto REPEATCHAR;
+     case OP_POSQUERY:
+     possessive = TRUE;
+     min = 0;
+     max = 1;
+     ecode++;
+     goto REPEATCHAR;
      case OP_STAR:
      case OP_MINSTAR:
      case OP_PLUS:
-Line 1961 
 for (;;)
+Line 2246 
 for (;;)
        if (length > 1)
          {
-         int oclength = 0;
-         uschar occhars[8];
  #ifdef SUPPORT_UCP
-         int othercase;
+         unsigned int othercase;
          if ((ims & PCRE_CASELESS) != 0 &&
-             (othercase = _pcre_ucp_othercase(fc)) >= 0 &&
+             (othercase = _pcre_ucp_othercase(fc)) != NOTACHAR)
-              othercase >= 0)
            oclength = _pcre_ord2utf8(othercase, occhars);
+         else oclength = 0;
  #endif  /* SUPPORT_UCP */
          for (i = 1; i <= min; i++)
            {
            if (memcmp(eptr, charptr, length) == 0) eptr += length;
+ #ifdef SUPPORT_UCP
            /* Need braces because of following else */
            else if (oclength == 0) { RRETURN(MATCH_NOMATCH); }
            else
-Line 1982 
 for (;;)
+Line 2265 
 for (;;)
              if (memcmp(eptr, occhars, oclength) != 0) RRETURN(MATCH_NOMATCH);
              eptr += oclength;
              }
+ #else   /* without SUPPORT_UCP */
+           else { RRETURN(MATCH_NOMATCH); }
+ #endif  /* SUPPORT_UCP */
            }
          if (min == max) continue;
-Line 1990 
 for (;;)
+Line 2276 
 for (;;)
            {
            for (fi = min;; fi++)
              {
-             RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+             RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM22);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
              if (memcmp(eptr, charptr, length) == 0) eptr += length;
+ #ifdef SUPPORT_UCP
              /* Need braces because of following else */
              else if (oclength == 0) { RRETURN(MATCH_NOMATCH); }
              else
-Line 2001 
 for (;;)
+Line 2288 
 for (;;)
                if (memcmp(eptr, occhars, oclength) != 0) RRETURN(MATCH_NOMATCH);
                eptr += oclength;
                }
+ #else   /* without SUPPORT_UCP */
+             else { RRETURN (MATCH_NOMATCH); }
+ #endif  /* SUPPORT_UCP */
              }
            /* Control never gets here */
            }
-         else
+         else  /* Maximize */
            {
            pp = eptr;
            for (i = min; i < max; i++)
              {
              if (eptr > md->end_subject - length) break;
              if (memcmp(eptr, charptr, length) == 0) eptr += length;
+ #ifdef SUPPORT_UCP
              else if (oclength == 0) break;
              else
                {
                if (memcmp(eptr, occhars, oclength) != 0) break;
                eptr += oclength;
                }
+ #else   /* without SUPPORT_UCP */
+             else break;
+ #endif  /* SUPPORT_UCP */
              }
-           while (eptr >= pp)
+           if (possessive) continue;
+           for(;;)
             {
-            RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+            RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM23);
             if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+            if (eptr == pp) RRETURN(MATCH_NOMATCH);
+ #ifdef SUPPORT_UCP
+            eptr--;
+            BACKCHAR(eptr);
+ #else   /* without SUPPORT_UCP */
             eptr -= length;
+ #endif  /* SUPPORT_UCP */
             }
-           RRETURN(MATCH_NOMATCH);
            }
          /* Control never gets here */
          }
-Line 2064 
 for (;;)
+Line 2366 
 for (;;)
          {
          for (fi = min;; fi++)
            {
-           RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+           RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM24);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max || eptr >= md->end_subject ||
                fc != md->lcc[*eptr++])
-Line 2072 
 for (;;)
+Line 2374 
 for (;;)
            }
          /* Control never gets here */
          }
-       else
+       else  /* Maximize */
          {
          pp = eptr;
          for (i = min; i < max; i++)
-Line 2080 
 for (;;)
+Line 2382 
 for (;;)
            if (eptr >= md->end_subject || fc != md->lcc[*eptr]) break;
            eptr++;
            }
+         if (possessive) continue;
          while (eptr >= pp)
            {
-           RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+           RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM25);
            eptr--;
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            }
-Line 2101 
 for (;;)
+Line 2404 
 for (;;)
          {
          for (fi = min;; fi++)
            {
-           RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+           RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM26);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max || eptr >= md->end_subject || fc != *eptr++)
              RRETURN(MATCH_NOMATCH);
            }
          /* Control never gets here */
          }
-       else
+       else  /* Maximize */
          {
          pp = eptr;
          for (i = min; i < max; i++)
-Line 2116 
 for (;;)
+Line 2419 
 for (;;)
            if (eptr >= md->end_subject || fc != *eptr) break;
            eptr++;
            }
+         if (possessive) continue;
          while (eptr >= pp)
            {
-           RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+           RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM27);
            eptr--;
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            }
-Line 2168 
 for (;;)
+Line 2472 
 for (;;)
      ecode += 3;
      goto REPEATNOTCHAR;
+     case OP_NOTPOSSTAR:
+     possessive = TRUE;
+     min = 0;
+     max = INT_MAX;
+     ecode++;
+     goto REPEATNOTCHAR;
+     case OP_NOTPOSPLUS:
+     possessive = TRUE;
+     min = 1;
+     max = INT_MAX;
+     ecode++;
+     goto REPEATNOTCHAR;
+     case OP_NOTPOSQUERY:
+     possessive = TRUE;
+     min = 0;
+     max = 1;
+     ecode++;
+     goto REPEATNOTCHAR;
+     case OP_NOTPOSUPTO:
+     possessive = TRUE;
+     min = 0;
+     max = GET2(ecode, 1);
+     ecode += 3;
+     goto REPEATNOTCHAR;
      case OP_NOTSTAR:
      case OP_NOTMINSTAR:
      case OP_NOTPLUS:
-Line 2207 
 for (;;)
+Line 2539 
 for (;;)
        /* UTF-8 mode */
        if (utf8)
          {
-         register int d;
+         register unsigned int d;
          for (i = 1; i <= min; i++)
            {
            GETCHARINC(d, eptr);
-Line 2232 
 for (;;)
+Line 2564 
 for (;;)
          /* UTF-8 mode */
          if (utf8)
            {
-           register int d;
+           register unsigned int d;
            for (fi = min;; fi++)
              {
-             RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+             RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM28);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              GETCHARINC(d, eptr);
              if (d < 256) d = md->lcc[d];
-Line 2249 
 for (;;)
+Line 2581 
 for (;;)
            {
            for (fi = min;; fi++)
              {
-             RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+             RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM29);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max || eptr >= md->end_subject || fc == md->lcc[*eptr++])
                RRETURN(MATCH_NOMATCH);
-Line 2268 
 for (;;)
+Line 2600 
 for (;;)
          /* UTF-8 mode */
          if (utf8)
            {
-           register int d;
+           register unsigned int d;
            for (i = min; i < max; i++)
              {
              int len = 1;
-Line 2278 
 for (;;)
+Line 2610 
 for (;;)
              if (fc == d) break;
              eptr += len;
              }
-           for(;;)
+         if (possessive) continue;
+         for(;;)
              {
-             RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+             RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM30);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (eptr-- == pp) break;        /* Stop if tried at original pos */
              BACKCHAR(eptr);
-Line 2295 
 for (;;)
+Line 2628 
 for (;;)
              if (eptr >= md->end_subject || fc == md->lcc[*eptr]) break;
              eptr++;
              }
+           if (possessive) continue;
            while (eptr >= pp)
              {
-             RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+             RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM31);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              eptr--;
              }
-Line 2316 
 for (;;)
+Line 2650 
 for (;;)
        /* UTF-8 mode */
        if (utf8)
          {
-         register int d;
+         register unsigned int d;
          for (i = 1; i <= min; i++)
            {
            GETCHARINC(d, eptr);
-Line 2339 
 for (;;)
+Line 2673 
 for (;;)
          /* UTF-8 mode */
          if (utf8)
            {
-           register int d;
+           register unsigned int d;
            for (fi = min;; fi++)
              {
-             RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+             RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM32);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              GETCHARINC(d, eptr);
              if (fi >= max || eptr >= md->end_subject || fc == d)
-Line 2355 
 for (;;)
+Line 2689 
 for (;;)
            {
            for (fi = min;; fi++)
              {
-             RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+             RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM33);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max || eptr >= md->end_subject || fc == *eptr++)
                RRETURN(MATCH_NOMATCH);
-Line 2374 
 for (;;)
+Line 2708 
 for (;;)
          /* UTF-8 mode */
          if (utf8)
            {
-           register int d;
+           register unsigned int d;
            for (i = min; i < max; i++)
              {
              int len = 1;
-Line 2383 
 for (;;)
+Line 2717 
 for (;;)
              if (fc == d) break;
              eptr += len;
              }
+           if (possessive) continue;
            for(;;)
              {
-             RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+             RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM34);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (eptr-- == pp) break;        /* Stop if tried at original pos */
              BACKCHAR(eptr);
-Line 2400 
 for (;;)
+Line 2735 
 for (;;)
              if (eptr >= md->end_subject || fc == *eptr) break;
              eptr++;
              }
+           if (possessive) continue;
            while (eptr >= pp)
              {
-             RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+             RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM35);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              eptr--;
              }
-Line 2431 
 for (;;)
+Line 2767 
 for (;;)
      ecode += 3;
      goto REPEATTYPE;
+     case OP_TYPEPOSSTAR:
+     possessive = TRUE;
+     min = 0;
+     max = INT_MAX;
+     ecode++;
+     goto REPEATTYPE;
+     case OP_TYPEPOSPLUS:
+     possessive = TRUE;
+     min = 1;
+     max = INT_MAX;
+     ecode++;
+     goto REPEATTYPE;
+     case OP_TYPEPOSQUERY:
+     possessive = TRUE;
+     min = 0;
+     max = 1;
+     ecode++;
+     goto REPEATTYPE;
+     case OP_TYPEPOSUPTO:
+     possessive = TRUE;
+     min = 0;
+     max = GET2(ecode, 1);
+     ecode += 3;
+     goto REPEATTYPE;
      case OP_TYPESTAR:
      case OP_TYPEMINSTAR:
      case OP_TYPEPLUS:
-Line 2481 
 for (;;)
+Line 2845 
 for (;;)
            for (i = 1; i <= min; i++)
              {
              if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
-             GETCHARINC(c, eptr);
+             GETCHARINCTEST(c, eptr);
              }
            break;
-Line 2489 
 for (;;)
+Line 2853 
 for (;;)
            for (i = 1; i <= min; i++)
              {
              if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
-             GETCHARINC(c, eptr);
+             GETCHARINCTEST(c, eptr);
              prop_category = _pcre_ucp_findprop(c, &prop_chartype, &prop_script);
              if ((prop_chartype == ucp_Lu ||
                   prop_chartype == ucp_Ll ||
-Line 2502 
 for (;;)
+Line 2866 
 for (;;)
            for (i = 1; i <= min; i++)
              {
              if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
-             GETCHARINC(c, eptr);
+             GETCHARINCTEST(c, eptr);
              prop_category = _pcre_ucp_findprop(c, &prop_chartype, &prop_script);
              if ((prop_category == prop_value) == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
-Line 2513 
 for (;;)
+Line 2877 
 for (;;)
            for (i = 1; i <= min; i++)
              {
              if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
-             GETCHARINC(c, eptr);
+             GETCHARINCTEST(c, eptr);
              prop_category = _pcre_ucp_findprop(c, &prop_chartype, &prop_script);
              if ((prop_chartype == prop_value) == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
-Line 2524 
 for (;;)
+Line 2888 
 for (;;)
            for (i = 1; i <= min; i++)
              {
              if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
-             GETCHARINC(c, eptr);
+             GETCHARINCTEST(c, eptr);
              prop_category = _pcre_ucp_findprop(c, &prop_chartype, &prop_script);
              if ((prop_script == prop_value) == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
-Line 2533 
 for (;;)
+Line 2897 
 for (;;)
            default:
            RRETURN(PCRE_ERROR_INTERNAL);
-           break;
            }
          }
-Line 2573 
 for (;;)
+Line 2936 
 for (;;)
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject ||
-              (*eptr++ == NEWLINE && (ims & PCRE_DOTALL) == 0))
+                ((ims & PCRE_DOTALL) == 0 && IS_NEWLINE(eptr)))
              RRETURN(MATCH_NOMATCH);
+           eptr++;
            while (eptr < md->end_subject && (*eptr & 0xc0) == 0x80) eptr++;
            }
          break;
-Line 2583 
 for (;;)
+Line 2947 
 for (;;)
          eptr += min;
          break;
+         case OP_ANYNL:
+         for (i = 1; i <= min; i++)
+           {
+           if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+           GETCHARINC(c, eptr);
+           switch(c)
+             {
+             default: RRETURN(MATCH_NOMATCH);
+             case 0x000d:
+             if (eptr < md->end_subject && *eptr == 0x0a) eptr++;
+             break;
+             case 0x000a:
+             break;
+             case 0x000b:
+             case 0x000c:
+             case 0x0085:
+             case 0x2028:
+             case 0x2029:
+             if (md->bsr_anycrlf) RRETURN(MATCH_NOMATCH);
+             break;
+             }
+           }
+         break;
+         case OP_NOT_HSPACE:
+         for (i = 1; i <= min; i++)
+           {
+           if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+           GETCHARINC(c, eptr);
+           switch(c)
+             {
+             default: break;
+             case 0x09:      /* HT */
+             case 0x20:      /* SPACE */
+             case 0xa0:      /* NBSP */
+             case 0x1680:    /* OGHAM SPACE MARK */
+             case 0x180e:    /* MONGOLIAN VOWEL SEPARATOR */
+             case 0x2000:    /* EN QUAD */
+             case 0x2001:    /* EM QUAD */
+             case 0x2002:    /* EN SPACE */
+             case 0x2003:    /* EM SPACE */
+             case 0x2004:    /* THREE-PER-EM SPACE */
+             case 0x2005:    /* FOUR-PER-EM SPACE */
+             case 0x2006:    /* SIX-PER-EM SPACE */
+             case 0x2007:    /* FIGURE SPACE */
+             case 0x2008:    /* PUNCTUATION SPACE */
+             case 0x2009:    /* THIN SPACE */
+             case 0x200A:    /* HAIR SPACE */
+             case 0x202f:    /* NARROW NO-BREAK SPACE */
+             case 0x205f:    /* MEDIUM MATHEMATICAL SPACE */
+             case 0x3000:    /* IDEOGRAPHIC SPACE */
+             RRETURN(MATCH_NOMATCH);
+             }
+           }
+         break;
+         case OP_HSPACE:
+         for (i = 1; i <= min; i++)
+           {
+           if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+           GETCHARINC(c, eptr);
+           switch(c)
+             {
+             default: RRETURN(MATCH_NOMATCH);
+             case 0x09:      /* HT */
+             case 0x20:      /* SPACE */
+             case 0xa0:      /* NBSP */
+             case 0x1680:    /* OGHAM SPACE MARK */
+             case 0x180e:    /* MONGOLIAN VOWEL SEPARATOR */
+             case 0x2000:    /* EN QUAD */
+             case 0x2001:    /* EM QUAD */
+             case 0x2002:    /* EN SPACE */
+             case 0x2003:    /* EM SPACE */
+             case 0x2004:    /* THREE-PER-EM SPACE */
+             case 0x2005:    /* FOUR-PER-EM SPACE */
+             case 0x2006:    /* SIX-PER-EM SPACE */
+             case 0x2007:    /* FIGURE SPACE */
+             case 0x2008:    /* PUNCTUATION SPACE */
+             case 0x2009:    /* THIN SPACE */
+             case 0x200A:    /* HAIR SPACE */
+             case 0x202f:    /* NARROW NO-BREAK SPACE */
+             case 0x205f:    /* MEDIUM MATHEMATICAL SPACE */
+             case 0x3000:    /* IDEOGRAPHIC SPACE */
+             break;
+             }
+           }
+         break;
+         case OP_NOT_VSPACE:
+         for (i = 1; i <= min; i++)
+           {
+           if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+           GETCHARINC(c, eptr);
+           switch(c)
+             {
+             default: break;
+             case 0x0a:      /* LF */
+             case 0x0b:      /* VT */
+             case 0x0c:      /* FF */
+             case 0x0d:      /* CR */
+             case 0x85:      /* NEL */
+             case 0x2028:    /* LINE SEPARATOR */
+             case 0x2029:    /* PARAGRAPH SEPARATOR */
+             RRETURN(MATCH_NOMATCH);
+             }
+           }
+         break;
+         case OP_VSPACE:
+         for (i = 1; i <= min; i++)
+           {
+           if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+           GETCHARINC(c, eptr);
+           switch(c)
+             {
+             default: RRETURN(MATCH_NOMATCH);
+             case 0x0a:      /* LF */
+             case 0x0b:      /* VT */
+             case 0x0c:      /* FF */
+             case 0x0d:      /* CR */
+             case 0x85:      /* NEL */
+             case 0x2028:    /* LINE SEPARATOR */
+             case 0x2029:    /* PARAGRAPH SEPARATOR */
+             break;
+             }
+           }
+         break;
          case OP_NOT_DIGIT:
          for (i = 1; i <= min; i++)
            {
-Line 2607 
 for (;;)
+Line 3101 
 for (;;)
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject ||
-              (*eptr < 128 && (md->ctypes[*eptr++] & ctype_space) != 0))
+              (*eptr < 128 && (md->ctypes[*eptr] & ctype_space) != 0))
              RRETURN(MATCH_NOMATCH);
-           while (eptr < md->end_subject && (*eptr & 0xc0) == 0x80) eptr++;
+           while (++eptr < md->end_subject && (*eptr & 0xc0) == 0x80);
            }
          break;
-Line 2627 
 for (;;)
+Line 3121 
 for (;;)
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject ||
-              (*eptr < 128 && (md->ctypes[*eptr++] & ctype_word) != 0))
+              (*eptr < 128 && (md->ctypes[*eptr] & ctype_word) != 0))
              RRETURN(MATCH_NOMATCH);
-           while (eptr < md->end_subject && (*eptr & 0xc0) == 0x80) eptr++;
+           while (++eptr < md->end_subject && (*eptr & 0xc0) == 0x80);
            }
          break;
-Line 2651 
 for (;;)
+Line 3145 
 for (;;)
  #endif     /* SUPPORT_UTF8 */
        /* Code for the non-UTF-8 case for minimum matching of operators other
-       than OP_PROP and OP_NOTPROP. */
+       than OP_PROP and OP_NOTPROP. We can assume that there are the minimum
+       number of bytes present, as this was tested above. */
        switch(ctype)
          {
-Line 2659 
 for (;;)
+Line 3154 
 for (;;)
          if ((ims & PCRE_DOTALL) == 0)
            {
            for (i = 1; i <= min; i++)
-             if (*eptr++ == NEWLINE) RRETURN(MATCH_NOMATCH);
+             {
+             if (IS_NEWLINE(eptr)) RRETURN(MATCH_NOMATCH);
+             eptr++;
+             }
            }
          else eptr += min;
          break;
-Line 2668 
 for (;;)
+Line 3166 
 for (;;)
          eptr += min;
          break;
+         /* Because of the CRLF case, we can't assume the minimum number of
+         bytes are present in this case. */
+         case OP_ANYNL:
+         for (i = 1; i <= min; i++)
+           {
+           if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+           switch(*eptr++)
+             {
+             default: RRETURN(MATCH_NOMATCH);
+             case 0x000d:
+             if (eptr < md->end_subject && *eptr == 0x0a) eptr++;
+             break;
+             case 0x000a:
+             break;
+             case 0x000b:
+             case 0x000c:
+             case 0x0085:
+             if (md->bsr_anycrlf) RRETURN(MATCH_NOMATCH);
+             break;
+             }
+           }
+         break;
+         case OP_NOT_HSPACE:
+         for (i = 1; i <= min; i++)
+           {
+           if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+           switch(*eptr++)
+             {
+             default: break;
+             case 0x09:      /* HT */
+             case 0x20:      /* SPACE */
+             case 0xa0:      /* NBSP */
+             RRETURN(MATCH_NOMATCH);
+             }
+           }
+         break;
+         case OP_HSPACE:
+         for (i = 1; i <= min; i++)
+           {
+           if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+           switch(*eptr++)
+             {
+             default: RRETURN(MATCH_NOMATCH);
+             case 0x09:      /* HT */
+             case 0x20:      /* SPACE */
+             case 0xa0:      /* NBSP */
+             break;
+             }
+           }
+         break;
+         case OP_NOT_VSPACE:
+         for (i = 1; i <= min; i++)
+           {
+           if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+           switch(*eptr++)
+             {
+             default: break;
+             case 0x0a:      /* LF */
+             case 0x0b:      /* VT */
+             case 0x0c:      /* FF */
+             case 0x0d:      /* CR */
+             case 0x85:      /* NEL */
+             RRETURN(MATCH_NOMATCH);
+             }
+           }
+         break;
+         case OP_VSPACE:
+         for (i = 1; i <= min; i++)
+           {
+           if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+           switch(*eptr++)
+             {
+             default: RRETURN(MATCH_NOMATCH);
+             case 0x0a:      /* LF */
+             case 0x0b:      /* VT */
+             case 0x0c:      /* FF */
+             case 0x0d:      /* CR */
+             case 0x85:      /* NEL */
+             break;
+             }
+           }
+         break;
          case OP_NOT_DIGIT:
          for (i = 1; i <= min; i++)
            if ((md->ctypes[*eptr++] & ctype_digit) != 0) RRETURN(MATCH_NOMATCH);
-Line 2723 
 for (;;)
+Line 3310 
 for (;;)
            case PT_ANY:
            for (fi = min;; fi++)
              {
-             RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+             RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM36);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
              GETCHARINC(c, eptr);
              if (prop_fail_result) RRETURN(MATCH_NOMATCH);
              }
-           break;
+           /* Control never gets here */
            case PT_LAMP:
            for (fi = min;; fi++)
              {
-             RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+             RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM37);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
              GETCHARINC(c, eptr);
-Line 2744 
 for (;;)
+Line 3331 
 for (;;)
                   prop_chartype == ucp_Lt) == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
-           break;
+           /* Control never gets here */
            case PT_GC:
            for (fi = min;; fi++)
              {
-             RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+             RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM38);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
              GETCHARINC(c, eptr);
-Line 2757 
 for (;;)
+Line 3344 
 for (;;)
              if ((prop_category == prop_value) == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
-           break;
+           /* Control never gets here */
            case PT_PC:
            for (fi = min;; fi++)
              {
-             RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+             RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM39);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
              GETCHARINC(c, eptr);
-Line 2770 
 for (;;)
+Line 3357 
 for (;;)
              if ((prop_chartype == prop_value) == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
-           break;
+           /* Control never gets here */
            case PT_SC:
            for (fi = min;; fi++)
              {
-             RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+             RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM40);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
              GETCHARINC(c, eptr);
-Line 2783 
 for (;;)
+Line 3370 
 for (;;)
              if ((prop_script == prop_value) == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
-           break;
+           /* Control never gets here */
            default:
            RRETURN(PCRE_ERROR_INTERNAL);
-           break;
            }
          }
-Line 2798 
 for (;;)
+Line 3384 
 for (;;)
          {
          for (fi = min;; fi++)
            {
-           RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+           RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM41);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
            GETCHARINCTEST(c, eptr);
-Line 2827 
 for (;;)
+Line 3413 
 for (;;)
          {
          for (fi = min;; fi++)
            {
-           RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+           RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM42);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
-           if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+           if (fi >= max || eptr >= md->end_subject ||
+                (ctype == OP_ANY && (ims & PCRE_DOTALL) == 0 &&
+                 IS_NEWLINE(eptr)))
+             RRETURN(MATCH_NOMATCH);
            GETCHARINC(c, eptr);
            switch(ctype)
              {
-             case OP_ANY:
+             case OP_ANY:        /* This is the DOTALL case */
-             if ((ims & PCRE_DOTALL) == 0 && c == NEWLINE) RRETURN(MATCH_NOMATCH);
              break;
              case OP_ANYBYTE:
              break;
+             case OP_ANYNL:
+             switch(c)
+               {
+               default: RRETURN(MATCH_NOMATCH);
+               case 0x000d:
+               if (eptr < md->end_subject && *eptr == 0x0a) eptr++;
+               break;
+               case 0x000a:
+               break;
+               case 0x000b:
+               case 0x000c:
+               case 0x0085:
+               case 0x2028:
+               case 0x2029:
+               if (md->bsr_anycrlf) RRETURN(MATCH_NOMATCH);
+               break;
+               }
+             break;
+             case OP_NOT_HSPACE:
+             switch(c)
+               {
+               default: break;
+               case 0x09:      /* HT */
+               case 0x20:      /* SPACE */
+               case 0xa0:      /* NBSP */
+               case 0x1680:    /* OGHAM SPACE MARK */
+               case 0x180e:    /* MONGOLIAN VOWEL SEPARATOR */
+               case 0x2000:    /* EN QUAD */
+               case 0x2001:    /* EM QUAD */
+               case 0x2002:    /* EN SPACE */
+               case 0x2003:    /* EM SPACE */
+               case 0x2004:    /* THREE-PER-EM SPACE */
+               case 0x2005:    /* FOUR-PER-EM SPACE */
+               case 0x2006:    /* SIX-PER-EM SPACE */
+               case 0x2007:    /* FIGURE SPACE */
+               case 0x2008:    /* PUNCTUATION SPACE */
+               case 0x2009:    /* THIN SPACE */
+               case 0x200A:    /* HAIR SPACE */
+               case 0x202f:    /* NARROW NO-BREAK SPACE */
+               case 0x205f:    /* MEDIUM MATHEMATICAL SPACE */
+               case 0x3000:    /* IDEOGRAPHIC SPACE */
+               RRETURN(MATCH_NOMATCH);
+               }
+             break;
+             case OP_HSPACE:
+             switch(c)
+               {
+               default: RRETURN(MATCH_NOMATCH);
+               case 0x09:      /* HT */
+               case 0x20:      /* SPACE */
+               case 0xa0:      /* NBSP */
+               case 0x1680:    /* OGHAM SPACE MARK */
+               case 0x180e:    /* MONGOLIAN VOWEL SEPARATOR */
+               case 0x2000:    /* EN QUAD */
+               case 0x2001:    /* EM QUAD */
+               case 0x2002:    /* EN SPACE */
+               case 0x2003:    /* EM SPACE */
+               case 0x2004:    /* THREE-PER-EM SPACE */
+               case 0x2005:    /* FOUR-PER-EM SPACE */
+               case 0x2006:    /* SIX-PER-EM SPACE */
+               case 0x2007:    /* FIGURE SPACE */
+               case 0x2008:    /* PUNCTUATION SPACE */
+               case 0x2009:    /* THIN SPACE */
+               case 0x200A:    /* HAIR SPACE */
+               case 0x202f:    /* NARROW NO-BREAK SPACE */
+               case 0x205f:    /* MEDIUM MATHEMATICAL SPACE */
+               case 0x3000:    /* IDEOGRAPHIC SPACE */
+               break;
+               }
+             break;
+             case OP_NOT_VSPACE:
+             switch(c)
+               {
+               default: break;
+               case 0x0a:      /* LF */
+               case 0x0b:      /* VT */
+               case 0x0c:      /* FF */
+               case 0x0d:      /* CR */
+               case 0x85:      /* NEL */
+               case 0x2028:    /* LINE SEPARATOR */
+               case 0x2029:    /* PARAGRAPH SEPARATOR */
+               RRETURN(MATCH_NOMATCH);
+               }
+             break;
+             case OP_VSPACE:
+             switch(c)
+               {
+               default: RRETURN(MATCH_NOMATCH);
+               case 0x0a:      /* LF */
+               case 0x0b:      /* VT */
+               case 0x0c:      /* FF */
+               case 0x0d:      /* CR */
+               case 0x85:      /* NEL */
+               case 0x2028:    /* LINE SEPARATOR */
+               case 0x2029:    /* PARAGRAPH SEPARATOR */
+               break;
+               }
+             break;
              case OP_NOT_DIGIT:
              if (c < 256 && (md->ctypes[c] & ctype_digit) != 0)
                RRETURN(MATCH_NOMATCH);
-Line 2882 
 for (;;)
+Line 3574 
 for (;;)
          {
          for (fi = min;; fi++)
            {
-           RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+           RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM43);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
-           if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+           if (fi >= max || eptr >= md->end_subject ||
+                ((ims & PCRE_DOTALL) == 0 && IS_NEWLINE(eptr)))
+             RRETURN(MATCH_NOMATCH);
            c = *eptr++;
            switch(ctype)
              {
-             case OP_ANY:
+             case OP_ANY:   /* This is the DOTALL case */
-             if ((ims & PCRE_DOTALL) == 0 && c == NEWLINE) RRETURN(MATCH_NOMATCH);
              break;
              case OP_ANYBYTE:
              break;
+             case OP_ANYNL:
+             switch(c)
+               {
+               default: RRETURN(MATCH_NOMATCH);
+               case 0x000d:
+               if (eptr < md->end_subject && *eptr == 0x0a) eptr++;
+               break;
+               case 0x000a:
+               break;
+               case 0x000b:
+               case 0x000c:
+               case 0x0085:
+               if (md->bsr_anycrlf) RRETURN(MATCH_NOMATCH);
+               break;
+               }
+             break;
+             case OP_NOT_HSPACE:
+             switch(c)
+               {
+               default: break;
+               case 0x09:      /* HT */
+               case 0x20:      /* SPACE */
+               case 0xa0:      /* NBSP */
+               RRETURN(MATCH_NOMATCH);
+               }
+             break;
+             case OP_HSPACE:
+             switch(c)
+               {
+               default: RRETURN(MATCH_NOMATCH);
+               case 0x09:      /* HT */
+               case 0x20:      /* SPACE */
+               case 0xa0:      /* NBSP */
+               break;
+               }
+             break;
+             case OP_NOT_VSPACE:
+             switch(c)
+               {
+               default: break;
+               case 0x0a:      /* LF */
+               case 0x0b:      /* VT */
+               case 0x0c:      /* FF */
+               case 0x0d:      /* CR */
+               case 0x85:      /* NEL */
+               RRETURN(MATCH_NOMATCH);
+               }
+             break;
+             case OP_VSPACE:
+             switch(c)
+               {
+               default: RRETURN(MATCH_NOMATCH);
+               case 0x0a:      /* LF */
+               case 0x0b:      /* VT */
+               case 0x0c:      /* FF */
+               case 0x0d:      /* CR */
+               case 0x85:      /* NEL */
+               break;
+               }
+             break;
              case OP_NOT_DIGIT:
              if ((md->ctypes[c] & ctype_digit) != 0) RRETURN(MATCH_NOMATCH);
              break;
-Line 2927 
 for (;;)
+Line 3688 
 for (;;)
        /* Control never gets here */
        }
-     /* If maximizing it is worth using inline code for speed, doing the type
+     /* If maximizing, it is worth using inline code for speed, doing the type
      test once at the start (i.e. keep it out of the loop). Again, keep the
      UTF-8 and UCP stuff separate. */
-Line 3008 
 for (;;)
+Line 3769 
 for (;;)
          /* eptr is now past the end of the maximum run */
+         if (possessive) continue;
          for(;;)
            {
-           RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+           RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM44);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (eptr-- == pp) break;        /* Stop if tried at original pos */
-           BACKCHAR(eptr);
+           if (utf8) BACKCHAR(eptr);
            }
          }
-Line 3043 
 for (;;)
+Line 3805 
 for (;;)
          /* eptr is now past the end of the maximum run */
+         if (possessive) continue;
          for(;;)
            {
-           RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+           RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM45);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (eptr-- == pp) break;        /* Stop if tried at original pos */
            for (;;)                        /* Move back over one extended */
              {
              int len = 1;
-             BACKCHAR(eptr);
              if (!utf8) c = *eptr; else
                {
+               BACKCHAR(eptr);
                GETCHARLEN(c, eptr, len);
                }
              prop_category = _pcre_ucp_findprop(c, &prop_chartype, &prop_script);
-Line 3074 
 for (;;)
+Line 3837 
 for (;;)
          switch(ctype)
            {
            case OP_ANY:
-           /* Special code is required for UTF8, but when the maximum is unlimited
-           we don't need it, so we repeat the non-UTF8 code. This is probably
-           worth it, because .* is quite a common idiom. */
            if (max < INT_MAX)
              {
              if ((ims & PCRE_DOTALL) == 0)
                {
                for (i = min; i < max; i++)
                  {
-                 if (eptr >= md->end_subject || *eptr == NEWLINE) break;
+                 if (eptr >= md->end_subject || IS_NEWLINE(eptr)) break;
                  eptr++;
                  while (eptr < md->end_subject && (*eptr & 0xc0) == 0x80) eptr++;
                  }
-Line 3094 
 for (;;)
+Line 3852 
 for (;;)
                {
                for (i = min; i < max; i++)
                  {
+                 if (eptr >= md->end_subject) break;
                  eptr++;
                  while (eptr < md->end_subject && (*eptr & 0xc0) == 0x80) eptr++;
                  }
-Line 3108 
 for (;;)
+Line 3867 
 for (;;)
                {
                for (i = min; i < max; i++)
                  {
-                 if (eptr >= md->end_subject || *eptr == NEWLINE) break;
+                 if (eptr >= md->end_subject || IS_NEWLINE(eptr)) break;
                  eptr++;
+                 while (eptr < md->end_subject && (*eptr & 0xc0) == 0x80) eptr++;
                  }
-               break;
                }
              else
                {
-               c = max - min;
+               eptr = md->end_subject;
-               if (c > md->end_subject - eptr) c = md->end_subject - eptr;
-               eptr += c;
                }
              }
            break;
-Line 3126 
 for (;;)
+Line 3883 
 for (;;)
            case OP_ANYBYTE:
            c = max - min;
-           if (c > md->end_subject - eptr) c = md->end_subject - eptr;
+           if (c > (unsigned int)(md->end_subject - eptr))
+             c = md->end_subject - eptr;
            eptr += c;
            break;
+           case OP_ANYNL:
+           for (i = min; i < max; i++)
+             {
+             int len = 1;
+             if (eptr >= md->end_subject) break;
+             GETCHARLEN(c, eptr, len);
+             if (c == 0x000d)
+               {
+               if (++eptr >= md->end_subject) break;
+               if (*eptr == 0x000a) eptr++;
+               }
+             else
+               {
+               if (c != 0x000a &&
+                   (md->bsr_anycrlf ||
+                    (c != 0x000b && c != 0x000c &&
+                     c != 0x0085 && c != 0x2028 && c != 0x2029)))
+                 break;
+               eptr += len;
+               }
+             }
+           break;
+           case OP_NOT_HSPACE:
+           case OP_HSPACE:
+           for (i = min; i < max; i++)
+             {
+             BOOL gotspace;
+             int len = 1;
+             if (eptr >= md->end_subject) break;
+             GETCHARLEN(c, eptr, len);
+             switch(c)
+               {
+               default: gotspace = FALSE; break;
+               case 0x09:      /* HT */
+               case 0x20:      /* SPACE */
+               case 0xa0:      /* NBSP */
+               case 0x1680:    /* OGHAM SPACE MARK */
+               case 0x180e:    /* MONGOLIAN VOWEL SEPARATOR */
+               case 0x2000:    /* EN QUAD */
+               case 0x2001:    /* EM QUAD */
+               case 0x2002:    /* EN SPACE */
+               case 0x2003:    /* EM SPACE */
+               case 0x2004:    /* THREE-PER-EM SPACE */
+               case 0x2005:    /* FOUR-PER-EM SPACE */
+               case 0x2006:    /* SIX-PER-EM SPACE */
+               case 0x2007:    /* FIGURE SPACE */
+               case 0x2008:    /* PUNCTUATION SPACE */
+               case 0x2009:    /* THIN SPACE */
+               case 0x200A:    /* HAIR SPACE */
+               case 0x202f:    /* NARROW NO-BREAK SPACE */
+               case 0x205f:    /* MEDIUM MATHEMATICAL SPACE */
+               case 0x3000:    /* IDEOGRAPHIC SPACE */
+               gotspace = TRUE;
+               break;
+               }
+             if (gotspace == (ctype == OP_NOT_HSPACE)) break;
+             eptr += len;
+             }
+           break;
+           case OP_NOT_VSPACE:
+           case OP_VSPACE:
+           for (i = min; i < max; i++)
+             {
+             BOOL gotspace;
+             int len = 1;
+             if (eptr >= md->end_subject) break;
+             GETCHARLEN(c, eptr, len);
+             switch(c)
+               {
+               default: gotspace = FALSE; break;
+               case 0x0a:      /* LF */
+               case 0x0b:      /* VT */
+               case 0x0c:      /* FF */
+               case 0x0d:      /* CR */
+               case 0x85:      /* NEL */
+               case 0x2028:    /* LINE SEPARATOR */
+               case 0x2029:    /* PARAGRAPH SEPARATOR */
+               gotspace = TRUE;
+               break;
+               }
+             if (gotspace == (ctype == OP_NOT_VSPACE)) break;
+             eptr += len;
+             }
+           break;
            case OP_NOT_DIGIT:
            for (i = min; i < max; i++)
              {
-Line 3202 
 for (;;)
+Line 4047 
 for (;;)
          /* eptr is now past the end of the maximum run */
+         if (possessive) continue;
          for(;;)
            {
-           RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+           RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM46);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (eptr-- == pp) break;        /* Stop if tried at original pos */
            BACKCHAR(eptr);
            }
          }
        else
- #endif
+ #endif  /* SUPPORT_UTF8 */
        /* Not UTF-8 mode */
          {
-Line 3222 
 for (;;)
+Line 4068 
 for (;;)
              {
              for (i = min; i < max; i++)
                {
-               if (eptr >= md->end_subject || *eptr == NEWLINE) break;
+               if (eptr >= md->end_subject || IS_NEWLINE(eptr)) break;
                eptr++;
                }
              break;
-Line 3231 
 for (;;)
+Line 4077 
 for (;;)
            case OP_ANYBYTE:
            c = max - min;
-           if (c > md->end_subject - eptr) c = md->end_subject - eptr;
+           if (c > (unsigned int)(md->end_subject - eptr))
+             c = md->end_subject - eptr;
            eptr += c;
            break;
+           case OP_ANYNL:
+           for (i = min; i < max; i++)
+             {
+             if (eptr >= md->end_subject) break;
+             c = *eptr;
+             if (c == 0x000d)
+               {
+               if (++eptr >= md->end_subject) break;
+               if (*eptr == 0x000a) eptr++;
+               }
+             else
+               {
+               if (c != 0x000a &&
+                   (md->bsr_anycrlf ||
+                     (c != 0x000b && c != 0x000c && c != 0x0085)))
+                 break;
+               eptr++;
+               }
+             }
+           break;
+           case OP_NOT_HSPACE:
+           for (i = min; i < max; i++)
+             {
+             if (eptr >= md->end_subject) break;
+             c = *eptr;
+             if (c == 0x09 || c == 0x20 || c == 0xa0) break;
+             eptr++;
+             }
+           break;
+           case OP_HSPACE:
+           for (i = min; i < max; i++)
+             {
+             if (eptr >= md->end_subject) break;
+             c = *eptr;
+             if (c != 0x09 && c != 0x20 && c != 0xa0) break;
+             eptr++;
+             }
+           break;
+           case OP_NOT_VSPACE:
+           for (i = min; i < max; i++)
+             {
+             if (eptr >= md->end_subject) break;
+             c = *eptr;
+             if (c == 0x0a || c == 0x0b || c == 0x0c || c == 0x0d || c == 0x85)
+               break;
+             eptr++;
+             }
+           break;
+           case OP_VSPACE:
+           for (i = min; i < max; i++)
+             {
+             if (eptr >= md->end_subject) break;
+             c = *eptr;
+             if (c != 0x0a && c != 0x0b && c != 0x0c && c != 0x0d && c != 0x85)
+               break;
+             eptr++;
+             }
+           break;
            case OP_NOT_DIGIT:
            for (i = min; i < max; i++)
              {
-Line 3295 
 for (;;)
+Line 4205 
 for (;;)
          /* eptr is now past the end of the maximum run */
+         if (possessive) continue;
          while (eptr >= pp)
            {
-           RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+           RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM47);
            eptr--;
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            }
-Line 3309 
 for (;;)
+Line 4220 
 for (;;)
        }
      /* Control never gets here */
-     /* There's been some horrible disaster. Since all codes > OP_BRA are
+     /* There's been some horrible disaster. Arrival here can only mean there is
-     for capturing brackets, and there shouldn't be any gaps between 0 and
+     something seriously wrong in the code above or the OP_xxx definitions. */
-     OP_BRA, arrival here can only mean there is something seriously wrong
-     in the code above or the OP_xxx definitions. */
      default:
      DPRINTF(("Unknown opcode %d\n", *ecode));
-     RRETURN(PCRE_ERROR_UNKNOWN_NODE);
+     RRETURN(PCRE_ERROR_UNKNOWN_OPCODE);
      }
    /* Do not stick any code in here without much thought; it is assumed
-Line 3325 
 for (;;)
+Line 4234 
 for (;;)
    }             /* End of main loop */
  /* Control never reaches here */
+ /* When compiling to use the heap rather than the stack for recursive calls to
+ match(), the RRETURN() macro jumps here. The number that is saved in
+ frame->Xwhere indicates which label we actually want to return to. */
+ #ifdef NO_RECURSE
+ #define LBL(val) case val: goto L_RM##val;
+ HEAP_RETURN:
+ switch (frame->Xwhere)
+   {
+   LBL( 1) LBL( 2) LBL( 3) LBL( 4) LBL( 5) LBL( 6) LBL( 7) LBL( 8)
+   LBL( 9) LBL(10) LBL(11) LBL(12) LBL(13) LBL(14) LBL(15) LBL(16)
+   LBL(17) LBL(18) LBL(19) LBL(20) LBL(21) LBL(22) LBL(23) LBL(24)
+   LBL(25) LBL(26) LBL(27) LBL(28) LBL(29) LBL(30) LBL(31) LBL(32)
+   LBL(33) LBL(34) LBL(35) LBL(36) LBL(37) LBL(38) LBL(39) LBL(40)
+   LBL(41) LBL(42) LBL(43) LBL(44) LBL(45) LBL(46) LBL(47) LBL(48)
+   LBL(49) LBL(50) LBL(51) LBL(52) LBL(53) LBL(54)
+   default:
+   DPRINTF(("jump error in pcre match: label %d non-existent\n", frame->Xwhere));
+   return PCRE_ERROR_INTERNAL;
+   }
+ #undef LBL
+ #endif  /* NO_RECURSE */
  }
-Line 3337 
 Undefine all the macros that were define
+Line 4270 
 Undefine all the macros that were define
  #ifdef NO_RECURSE
  #undef eptr
  #undef ecode
+ #undef mstart
  #undef offset_top
  #undef ims
  #undef eptrb
-Line 3354 
 Undefine all the macros that were define
+Line 4288 
 Undefine all the macros that were define
  #undef cur_is_word
  #undef condition
- #undef minimize
  #undef prev_is_word
  #undef original_ims
-Line 3410 
 Returns:          > 0 => success; value
+Line 4343 
 Returns:          > 0 => success; value
                   < -1 => some kind of unexpected problem
  */
- PCRE_DATA_SCOPE int
+ PCRE_EXP_DEFN int
  pcre_exec(const pcre *argument_re, const pcre_extra *extra_data,
    PCRE_SPTR subject, int length, int start_offset, int options, int *offsets,
    int offsetcount)
-Line 3419 
 int rc, resetcount, ocount;
+Line 4352 
 int rc, resetcount, ocount;
  int first_byte = -1;
  int req_byte = -1;
  int req_byte2 = -1;
- unsigned long int ims = 0;
+ int newline;
+ unsigned long int ims;
  BOOL using_temporary_offsets = FALSE;
  BOOL anchored;
  BOOL startline;
  BOOL firstline;
  BOOL first_byte_caseless = FALSE;
  BOOL req_byte_caseless = FALSE;
+ BOOL utf8;
  match_data match_block;
+ match_data *md = &match_block;
  const uschar *tables;
  const uschar *start_bits = NULL;
  USPTR start_match = (USPTR)subject + start_offset;
-Line 3451 
 if (offsetcount < 0) return PCRE_ERROR_B
+Line 4387 
 if (offsetcount < 0) return PCRE_ERROR_B
  the default values. */
  study = NULL;
- match_block.match_limit = MATCH_LIMIT;
+ md->match_limit = MATCH_LIMIT;
- match_block.match_limit_recursion = MATCH_LIMIT_RECURSION;
+ md->match_limit_recursion = MATCH_LIMIT_RECURSION;
- match_block.callout_data = NULL;
+ md->callout_data = NULL;
  /* The table pointer is always in native byte order. */
-Line 3465 
 if (extra_data != NULL)
+Line 4401 
 if (extra_data != NULL)
    if ((flags & PCRE_EXTRA_STUDY_DATA) != 0)
      study = (const pcre_study_data *)extra_data->study_data;
    if ((flags & PCRE_EXTRA_MATCH_LIMIT) != 0)
-     match_block.match_limit = extra_data->match_limit;
+     md->match_limit = extra_data->match_limit;
    if ((flags & PCRE_EXTRA_MATCH_LIMIT_RECURSION) != 0)
-     match_block.match_limit_recursion = extra_data->match_limit_recursion;
+     md->match_limit_recursion = extra_data->match_limit_recursion;
    if ((flags & PCRE_EXTRA_CALLOUT_DATA) != 0)
-     match_block.callout_data = extra_data->callout_data;
+     md->callout_data = extra_data->callout_data;
    if ((flags & PCRE_EXTRA_TABLES) != 0) tables = extra_data->tables;
    }
-Line 3494 
 if (re->magic_number != MAGIC_NUMBER)
+Line 4430 
 if (re->magic_number != MAGIC_NUMBER)
  /* Set up other data */
  anchored = ((re->options | options) & PCRE_ANCHORED) != 0;
- startline = (re->options & PCRE_STARTLINE) != 0;
+ startline = (re->flags & PCRE_STARTLINE) != 0;
  firstline = (re->options & PCRE_FIRSTLINE) != 0;
  /* The code starts after the real_pcre block and the capture name table. */
- match_block.start_code = (const uschar *)external_re + re->name_table_offset +
+ md->start_code = (const uschar *)external_re + re->name_table_offset +
    re->name_count * re->name_entry_size;
- match_block.start_subject = (USPTR)subject;
+ md->start_subject = (USPTR)subject;
- match_block.start_offset = start_offset;
+ md->start_offset = start_offset;
- match_block.end_subject = match_block.start_subject + length;
+ md->end_subject = md->start_subject + length;
- end_subject = match_block.end_subject;
+ end_subject = md->end_subject;
- match_block.endonly = (re->options & PCRE_DOLLAR_ENDONLY) != 0;
+ md->endonly = (re->options & PCRE_DOLLAR_ENDONLY) != 0;
- match_block.utf8 = (re->options & PCRE_UTF8) != 0;
+ utf8 = md->utf8 = (re->options & PCRE_UTF8) != 0;
- match_block.notbol = (options & PCRE_NOTBOL) != 0;
+ md->notbol = (options & PCRE_NOTBOL) != 0;
- match_block.noteol = (options & PCRE_NOTEOL) != 0;
+ md->noteol = (options & PCRE_NOTEOL) != 0;
- match_block.notempty = (options & PCRE_NOTEMPTY) != 0;
+ md->notempty = (options & PCRE_NOTEMPTY) != 0;
- match_block.partial = (options & PCRE_PARTIAL) != 0;
+ md->partial = (options & PCRE_PARTIAL) != 0;
- match_block.hitend = FALSE;
+ md->hitend = FALSE;
+ md->recursive = NULL;                   /* No recursion at top level */
+ md->lcc = tables + lcc_offset;
+ md->ctypes = tables + ctypes_offset;
+ /* Handle different \R options. */
+ switch (options & (PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE))
+   {
+   case 0:
+   if ((re->options & (PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE)) != 0)
+     md->bsr_anycrlf = (re->options & PCRE_BSR_ANYCRLF) != 0;
+   else
+ #ifdef BSR_ANYCRLF
+   md->bsr_anycrlf = TRUE;
+ #else
+   md->bsr_anycrlf = FALSE;
+ #endif
+   break;
+   case PCRE_BSR_ANYCRLF:
+   md->bsr_anycrlf = TRUE;
+   break;
+   case PCRE_BSR_UNICODE:
+   md->bsr_anycrlf = FALSE;
+   break;
+   default: return PCRE_ERROR_BADNEWLINE;
+   }
+ /* Handle different types of newline. The three bits give eight cases. If
+ nothing is set at run time, whatever was used at compile time applies. */
- match_block.recursive = NULL;                   /* No recursion at top level */
+ switch ((((options & PCRE_NEWLINE_BITS) == 0)? re->options :
+         (pcre_uint32)options) & PCRE_NEWLINE_BITS)
+   {
+   case 0: newline = NEWLINE; break;   /* Compile-time default */
+   case PCRE_NEWLINE_CR: newline = '\r'; break;
+   case PCRE_NEWLINE_LF: newline = '\n'; break;
+   case PCRE_NEWLINE_CR+
+        PCRE_NEWLINE_LF: newline = ('\r' << 8) | '\n'; break;
+   case PCRE_NEWLINE_ANY: newline = -1; break;
+   case PCRE_NEWLINE_ANYCRLF: newline = -2; break;
+   default: return PCRE_ERROR_BADNEWLINE;
+   }
- match_block.lcc = tables + lcc_offset;
+ if (newline == -2)
- match_block.ctypes = tables + ctypes_offset;
+   {
+   md->nltype = NLTYPE_ANYCRLF;
+   }
+ else if (newline < 0)
+   {
+   md->nltype = NLTYPE_ANY;
+   }
+ else
+   {
+   md->nltype = NLTYPE_FIXED;
+   if (newline > 255)
+     {
+     md->nllen = 2;
+     md->nl[0] = (newline >> 8) & 255;
+     md->nl[1] = newline & 255;
+     }
+   else
+     {
+     md->nllen = 1;
+     md->nl[0] = newline;
+     }
+   }
  /* Partial matching is supported only for a restricted set of regexes at the
  moment. */
- if (match_block.partial && (re->options & PCRE_NOPARTIAL) != 0)
+ if (md->partial && (re->flags & PCRE_NOPARTIAL) != 0)
    return PCRE_ERROR_BADPARTIAL;
  /* Check a UTF-8 string if required. Unfortunately there's no way of passing
  back the character offset. */
  #ifdef SUPPORT_UTF8
- if (match_block.utf8 && (options & PCRE_NO_UTF8_CHECK) == 0)
+ if (utf8 && (options & PCRE_NO_UTF8_CHECK) == 0)
    {
    if (_pcre_valid_utf8((uschar *)subject, length) >= 0)
      return PCRE_ERROR_BADUTF8;
-Line 3563 
 ocount = offsetcount - (offsetcount % 3)
+Line 4565 
 ocount = offsetcount - (offsetcount % 3)
  if (re->top_backref > 0 && re->top_backref >= ocount/3)
    {
    ocount = re->top_backref * 3 + 3;
-   match_block.offset_vector = (int *)(pcre_malloc)(ocount * sizeof(int));
+   md->offset_vector = (int *)(pcre_malloc)(ocount * sizeof(int));
-   if (match_block.offset_vector == NULL) return PCRE_ERROR_NOMEMORY;
+   if (md->offset_vector == NULL) return PCRE_ERROR_NOMEMORY;
    using_temporary_offsets = TRUE;
    DPRINTF(("Got memory to hold back references\n"));
    }
- else match_block.offset_vector = offsets;
+ else md->offset_vector = offsets;
- match_block.offset_end = ocount;
+ md->offset_end = ocount;
- match_block.offset_max = (2*ocount)/3;
+ md->offset_max = (2*ocount)/3;
- match_block.offset_overflow = FALSE;
+ md->offset_overflow = FALSE;
- match_block.capture_last = -1;
+ md->capture_last = -1;
  /* Compute the minimum number of offsets that we need to reset each time. Doing
  this makes a huge difference to execution time when there aren't many brackets
-Line 3586 
 if (resetcount > offsetcount) resetcount
+Line 4588 
 if (resetcount > offsetcount) resetcount
  never be used unless previously set, but they get saved and restored, and so we
  initialize them to avoid reading uninitialized locations. */
- if (match_block.offset_vector != NULL)
+ if (md->offset_vector != NULL)
    {
-   register int *iptr = match_block.offset_vector + ocount;
+   register int *iptr = md->offset_vector + ocount;
    register int *iend = iptr - resetcount/2 + 1;
    while (--iptr >= iend) *iptr = -1;
    }
-Line 3601 
 studied, there may be a bitmap of possib
+Line 4603 
 studied, there may be a bitmap of possib
  if (!anchored)
    {
-   if ((re->options & PCRE_FIRSTSET) != 0)
+   if ((re->flags & PCRE_FIRSTSET) != 0)
      {
      first_byte = re->first_byte & 255;
      if ((first_byte_caseless = ((re->first_byte & REQ_CASELESS) != 0)) == TRUE)
-       first_byte = match_block.lcc[first_byte];
+       first_byte = md->lcc[first_byte];
      }
    else
      if (!startline && study != NULL &&
-Line 3616 
 if (!anchored)
+Line 4618 
 if (!anchored)
  /* For anchored or unanchored matches, there may be a "last known required
  character" set. */
- if ((re->options & PCRE_REQCHSET) != 0)
+ if ((re->flags & PCRE_REQCHSET) != 0)
    {
    req_byte = re->req_byte & 255;
    req_byte_caseless = (re->req_byte & REQ_CASELESS) != 0;
    req_byte2 = (tables + fcc_offset)[req_byte];  /* case flipped */
    }
+ /* ==========================================================================*/
  /* Loop for handling unanchored repeated matching attempts; for anchored regexs
  the loop runs just once. */
- do
+ for(;;)
    {
    USPTR save_end_subject = end_subject;
+   USPTR new_start_match;
    /* Reset the maximum number of extractions we might see. */
-   if (match_block.offset_vector != NULL)
+   if (md->offset_vector != NULL)
      {
-     register int *iptr = match_block.offset_vector;
+     register int *iptr = md->offset_vector;
      register int *iend = iptr + resetcount;
      while (iptr < iend) *iptr++ = -1;
      }
    /* Advance to a unique first char if possible. If firstline is TRUE, the
    start of the match is constrained to the first line of a multiline string.
-   Implement this by temporarily adjusting end_subject so that we stop scanning
+   That is, the match must be before or at the first newline. Implement this by
-   at a newline. If the match fails at the newline, later code breaks this loop.
+   temporarily adjusting end_subject so that we stop scanning at a newline. If
-   */
+   the match fails at the newline, later code breaks this loop. */
    if (firstline)
      {
      USPTR t = start_match;
-     while (t < save_end_subject && *t != '\n') t++;
+     while (t < md->end_subject && !IS_NEWLINE(t)) t++;
      end_subject = t;
      }
-Line 3658 
 do
+Line 4664 
 do
      {
      if (first_byte_caseless)
        while (start_match < end_subject &&
-              match_block.lcc[*start_match] != first_byte)
+              md->lcc[*start_match] != first_byte)
          start_match++;
      else
        while (start_match < end_subject && *start_match != first_byte)
          start_match++;
      }
-   /* Or to just after \n for a multiline match if possible */
+   /* Or to just after a linebreak for a multiline match if possible */
    else if (startline)
      {
-     if (start_match > match_block.start_subject + start_offset)
+     if (start_match > md->start_subject + start_offset)
        {
-       while (start_match < end_subject && start_match[-1] != NEWLINE)
+       while (start_match <= end_subject && !WAS_NEWLINE(start_match))
+         start_match++;
+       /* If we have just passed a CR and the newline option is ANY or ANYCRLF,
+       and we are now at a LF, advance the match position by one more character.
+       */
+       if (start_match[-1] == '\r' &&
+            (md->nltype == NLTYPE_ANY || md->nltype == NLTYPE_ANYCRLF) &&
+            start_match < end_subject &&
+            *start_match == '\n')
          start_match++;
        }
      }
-Line 3693 
 do
+Line 4709 
 do
  #ifdef DEBUG  /* Sigh. Some compilers never learn. */
    printf(">>>> Match against: ");
-   pchars(start_match, end_subject - start_match, TRUE, &match_block);
+   pchars(start_match, end_subject - start_match, TRUE, md);
    printf("\n");
  #endif
-Line 3707 
 do
+Line 4723 
 do
    HOWEVER: when the subject string is very, very long, searching to its end can
    take a long time, and give bad performance on quite ordinary patterns. This
-   showed up when somebody was matching /^C/ on a 32-megabyte string... so we
+   showed up when somebody was matching something like /^\d+C/ on a 32-megabyte
-   don't do this when the string is sufficiently long.
+   string... so we don't do this when the string is sufficiently long.
    ALSO: this processing is disabled when partial matching is requested.
    */
    if (req_byte >= 0 &&
        end_subject - start_match < REQ_BYTE_MAX &&
-       !match_block.partial)
+       !md->partial)
      {
      register USPTR p = start_match + ((first_byte >= 0)? 1 : 0);
-Line 3740 
 do
+Line 4756 
 do
            }
          }
-       /* If we can't find the required character, break the matching loop */
+       /* If we can't find the required character, break the matching loop,
+       forcing a match failure. */
-       if (p >= end_subject) break;
+       if (p >= end_subject)
+         {
+         rc = MATCH_NOMATCH;
+         break;
+         }
        /* If we have found the required character, save the point where we
        found it, so that we don't search again next time round the loop if
-Line 3752 
 do
+Line 4773 
 do
        }
      }
-   /* When a match occurs, substrings will be set for all internal extractions;
+   /* OK, we can now run the match. */
-   we just need to set up the whole thing as substring 0 before returning. If
-   there were too many extractions, set the return code to zero. In the case
-   where we had to get some local store to hold offsets for backreferences, copy
-   those back references that we can. In this case there need not be overflow
-   if certain parts of the pattern were not used. */
-   match_block.start_match = start_match;
-   match_block.match_call_count = 0;
-   rc = match(start_match, match_block.start_code, 2, &match_block, ims, NULL,
-     match_isgroup, 0);
-   /* When the result is no match, if the subject's first character was a
-   newline and the PCRE_FIRSTLINE option is set, break (which will return
-   PCRE_ERROR_NOMATCH). The option requests that a match occur before the first
-   newline in the subject. Otherwise, advance the pointer to the next character
-   and continue - but the continuation will actually happen only when the
-   pattern is not anchored. */
-   if (rc == MATCH_NOMATCH)
+   md->start_match_ptr = start_match;
+   md->match_call_count = 0;
+   rc = match(start_match, md->start_code, start_match, 2, md, ims, NULL, 0, 0);
+   switch(rc)
      {
-     if (firstline && *start_match == NEWLINE) break;
+     /* NOMATCH and PRUNE advance by one character. THEN at this level acts
-     start_match++;
+     exactly like PRUNE. */
+     case MATCH_NOMATCH:
+     case MATCH_PRUNE:
+     case MATCH_THEN:
+     new_start_match = start_match + 1;
  #ifdef SUPPORT_UTF8
-     if (match_block.utf8)
+     if (utf8)
-       while(start_match < end_subject && (*start_match & 0xc0) == 0x80)
+       while(new_start_match < end_subject && (*new_start_match & 0xc0) == 0x80)
-         start_match++;
+         new_start_match++;
  #endif
-     continue;
+     break;
-     }
-   if (rc != MATCH_MATCH)
+     /* SKIP passes back the next starting point explicitly. */
-     {
-     DPRINTF((">>>> error: returning %d\n", rc));
+     case MATCH_SKIP:
-     return rc;
+     new_start_match = md->start_match_ptr;
+     break;
+     /* COMMIT disables the bumpalong, but otherwise behaves as NOMATCH. */
+     case MATCH_COMMIT:
+     rc = MATCH_NOMATCH;
+     goto ENDLOOP;
+     /* Any other return is some kind of error. */
+     default:
+     goto ENDLOOP;
      }
-   /* We have a match! Copy the offset information from temporary store if
+   /* Control reaches here for the various types of "no match at this point"
-   necessary */
+   result. Reset the code to MATCH_NOMATCH for subsequent checking. */
+   rc = MATCH_NOMATCH;
+   /* If PCRE_FIRSTLINE is set, the match must happen before or at the first
+   newline in the subject (though it may continue over the newline). Therefore,
+   if we have just failed to match, starting at a newline, do not continue. */
+   if (firstline && IS_NEWLINE(start_match)) break;
+   /* Advance to new matching position */
+   start_match = new_start_match;
+   /* Break the loop if the pattern is anchored or if we have passed the end of
+   the subject. */
+   if (anchored || start_match > end_subject) break;
+   /* If we have just passed a CR and we are now at a LF, and the pattern does
+   not contain any explicit matches for \r or \n, and the newline option is CRLF
+   or ANY or ANYCRLF, advance the match position by one more character. */
+   if (start_match[-1] == '\r' &&
+       start_match < end_subject &&
+       *start_match == '\n' &&
+       (re->flags & PCRE_HASCRORLF) == 0 &&
+         (md->nltype == NLTYPE_ANY ||
+          md->nltype == NLTYPE_ANYCRLF ||
+          md->nllen == 2))
+     start_match++;
+   }   /* End of for(;;) "bumpalong" loop */
+ /* ==========================================================================*/
+ /* We reach here when rc is not MATCH_NOMATCH, or if one of the stopping
+ conditions is true:
+ (1) The pattern is anchored or the match was failed by (*COMMIT);
+ (2) We are past the end of the subject;
+ (3) PCRE_FIRSTLINE is set and we have failed to match at a newline, because
+     this option requests that a match occur at or before the first newline in
+     the subject.
+ When we have a match and the offset vector is big enough to deal with any
+ backreferences, captured substring offsets will already be set up. In the case
+ where we had to get some local store to hold offsets for backreference
+ processing, copy those that we can. In this case there need not be overflow if
+ certain parts of the pattern were not used, even though there are more
+ capturing parentheses than vector slots. */
+ ENDLOOP:
+ if (rc == MATCH_MATCH)
+   {
    if (using_temporary_offsets)
      {
      if (offsetcount >= 4)
        {
-       memcpy(offsets + 2, match_block.offset_vector + 2,
+       memcpy(offsets + 2, md->offset_vector + 2,
          (offsetcount - 2) * sizeof(int));
        DPRINTF(("Copied offsets from temporary memory\n"));
        }
-     if (match_block.end_offset_top > offsetcount)
+     if (md->end_offset_top > offsetcount) md->offset_overflow = TRUE;
-       match_block.offset_overflow = TRUE;
      DPRINTF(("Freeing temporary memory\n"));
-     (pcre_free)(match_block.offset_vector);
+     (pcre_free)(md->offset_vector);
      }
-   rc = match_block.offset_overflow? 0 : match_block.end_offset_top/2;
+   /* Set the return code to the number of captured strings, or 0 if there are
+   too many to fit into the vector. */
+   rc = md->offset_overflow? 0 : md->end_offset_top/2;
+   /* If there is space, set up the whole thing as substring 0. The value of
+   md->start_match_ptr might be modified if \K was encountered on the success
+   matching path. */
    if (offsetcount < 2) rc = 0; else
      {
-     offsets[0] = start_match - match_block.start_subject;
+     offsets[0] = md->start_match_ptr - md->start_subject;
-     offsets[1] = match_block.end_match_ptr - match_block.start_subject;
+     offsets[1] = md->end_match_ptr - md->start_subject;
      }
    DPRINTF((">>>> returning %d\n", rc));
    return rc;
    }
- /* This "while" is the end of the "do" above */
+ /* Control gets here if there has been an error, or if the overall match
+ attempt has failed at all permitted starting positions. */
- while (!anchored && start_match <= end_subject);
  if (using_temporary_offsets)
    {
    DPRINTF(("Freeing temporary memory\n"));
-   (pcre_free)(match_block.offset_vector);
+   (pcre_free)(md->offset_vector);
    }
- if (match_block.partial && match_block.hitend)
+ if (rc != MATCH_NOMATCH)
+   {
+   DPRINTF((">>>> error: returning %d\n", rc));
+   return rc;
+   }
+ else if (md->partial && md->hitend)
    {
    DPRINTF((">>>> returning PCRE_ERROR_PARTIAL\n"));
    return PCRE_ERROR_PARTIAL;

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Added in v.243
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-Removed from v.87
+Added in v.243

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