text: /*************************************************
  *      Perl-Compatible Regular Expressions       *
  *************************************************/
  
  /* PCRE is a library of functions to support regular expressions whose syntax
  and semantics are as close as possible to those of the Perl 5 language.
  
                         Written by Philip Hazel
             Copyright (c) 1997-2012 University of Cambridge
  
  -----------------------------------------------------------------------------
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are met:
  
      * Redistributions of source code must retain the above copyright notice,
        this list of conditions and the following disclaimer.
  
      * Redistributions in binary form must reproduce the above copyright
        notice, this list of conditions and the following disclaimer in the
        documentation and/or other materials provided with the distribution.
  
      * Neither the name of the University of Cambridge nor the names of its
        contributors may be used to endorse or promote products derived from
        this software without specific prior written permission.
  
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  POSSIBILITY OF SUCH DAMAGE.
  -----------------------------------------------------------------------------
  */
  
  /* This module contains pcre_exec(), the externally visible function that does
  pattern matching using an NFA algorithm, trying to mimic Perl as closely as
  possible. There are also some static supporting functions. */
  
  #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 */
  
  #undef min
  #undef max
  
  /* Values for setting in md->match_function_type to indicate two special types
  of call to match(). We do it this way to save on using another stack variable,
  as stack usage is to be discouraged. */
  
  #define MATCH_CONDASSERT     1  /* Called to check a condition assertion */
  #define MATCH_CBEGROUP       2  /* 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. */
  
  #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_ACCEPT       (-999)
  #define MATCH_COMMIT       (-998)
  #define MATCH_KETRPOS      (-997)
  #define MATCH_ONCE         (-996)
  #define MATCH_PRUNE        (-995)
  #define MATCH_SKIP         (-994)
  #define MATCH_SKIP_ARG     (-993)
  #define MATCH_THEN         (-992)
  
  /* 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. */
  
  #define REC_STACK_SAVE_MAX 30
  
  /* Min and max values for the common repeats; for the maxima, 0 => infinity */
  
  static const char rep_min[] = { 0, 0, 1, 1, 0, 0 };
  static const char rep_max[] = { 0, 0, 0, 0, 1, 1 };
  
  
  
  #ifdef PCRE_DEBUG
  /*************************************************
  *        Debugging function to print chars       *
  *************************************************/
  
  /* Print a sequence of chars in printable format, stopping at the end of the
  subject if the requested.
  
  Arguments:
    p           points to characters
    length      number to print
    is_subject  TRUE if printing from within md->start_subject
    md          pointer to matching data block, if is_subject is TRUE
  
  Returns:     nothing
  */
  
  static void
  pchars(const pcre_uchar *p, int length, BOOL is_subject, match_data *md)
  {
  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);
  }
  #endif
  
  
  
  /*************************************************
  *          Match a back-reference                *
  *************************************************/
  
  /* Normally, if a back reference hasn't been set, the length that is passed is
  negative, so the match always fails. However, in JavaScript compatibility mode,
  the length passed is zero. Note that in caseless UTF-8 mode, the number of
  subject bytes matched may be different to the number of reference bytes.
  
  Arguments:
    offset      index into the offset vector
    eptr        pointer into the subject
    length      length of reference to be matched (number of bytes)
    md          points to match data block
    caseless    TRUE if caseless
  
  Returns:      >= 0 the number of subject bytes matched
                -1 no match
                -2 partial match; always given if at end subject
  */
  
  static int
  match_ref(int offset, register PCRE_PUCHAR eptr, int length, match_data *md,
    BOOL caseless)
  {
  PCRE_PUCHAR eptr_start = eptr;
  register PCRE_PUCHAR p = md->start_subject + md->offset_vector[offset];
  
  #ifdef PCRE_DEBUG
  if (eptr >= md->end_subject)
    printf("matching subject <null>");
  else
    {
    printf("matching subject ");
    pchars(eptr, length, TRUE, md);
    }
  printf(" against backref ");
  pchars(p, length, FALSE, md);
  printf("\n");
  #endif
  
  /* Always fail if reference not set (and not JavaScript compatible - in that
  case the length is passed as zero). */
  
  if (length < 0) return -1;
  
  /* Separate the caseless case for speed. In UTF-8 mode we can only do this
  properly if Unicode properties are supported. Otherwise, we can check only
  ASCII characters. */
  
  if (caseless)
    {
  #ifdef SUPPORT_UTF
  #ifdef SUPPORT_UCP
    if (md->utf)
      {
      /* Match characters up to the end of the reference. NOTE: the number of
      bytes matched may differ, because there are some characters whose upper and
      lower case versions code as different numbers of bytes. For example, U+023A
      (2 bytes in UTF-8) is the upper case version of U+2C65 (3 bytes in UTF-8);
      a sequence of 3 of the former uses 6 bytes, as does a sequence of two of
      the latter. It is important, therefore, to check the length along the
      reference, not along the subject (earlier code did this wrong). */
  
      PCRE_PUCHAR endptr = p + length;
      while (p < endptr)
        {
        int c, d;
        if (eptr >= md->end_subject) return -2;   /* Partial match */
        GETCHARINC(c, eptr);
        GETCHARINC(d, p);
        if (c != d && c != UCD_OTHERCASE(d)) return -1;
        }
      }
    else
  #endif
  #endif
  
    /* The same code works when not in UTF-8 mode and in UTF-8 mode when there
    is no UCP support. */
      {
      while (length-- > 0)
        {
        if (eptr >= md->end_subject) return -2;   /* Partial match */
        if (TABLE_GET(*p, md->lcc, *p) != TABLE_GET(*eptr, md->lcc, *eptr)) return -1;
        p++;
        eptr++;
        }
      }
    }
  
  /* In the caseful case, we can just compare the bytes, whether or not we
  are in UTF-8 mode. */
  
  else
    {
    while (length-- > 0)
      {
      if (eptr >= md->end_subject) return -2;   /* Partial match */
      if (*p++ != *eptr++) return -1;
      }
    }
  
  return (int)(eptr - eptr_start);
  }
  
  
  
  /***************************************************************************
  ****************************************************************************
                     RECURSION IN THE match() FUNCTION
  
  The match() function is highly recursive, though not every recursive call
  increases the recursive depth. Nevertheless, some regular expressions can cause
  it to recurse to a great depth. I was writing for Unix, so I just let it call
  itself recursively. This uses the stack for saving everything that has to be
  saved for a recursive call. On Unix, the stack can be large, and this works
  fine.
  
  It turns out that on some non-Unix-like systems there are problems with
  programs that use a lot of stack. (This despite the fact that every last chip
  has oodles of memory these days, and techniques for extending the stack have
  been known for decades.) So....
  
  There is a fudge, triggered by defining NO_RECURSE, which avoids recursive
  calls by keeping local variables that need to be preserved in blocks of memory
  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, RM55, RM56, RM57, RM58, RM59, RM60,
         RM61,  RM62, RM63, RM64, RM65, RM66 };
  
  /* These versions of the macros use the stack, as normal. There are debugging
  versions and production versions. Note that the "rw" argument of RMATCH isn't
  actually used in this definition. */
  
  #ifndef NO_RECURSE
  #define REGISTER register
  
  #ifdef PCRE_DEBUG
  #define RMATCH(ra,rb,rc,rd,re,rw) \
    { \
    printf("match() called in line %d\n", __LINE__); \
    rrc = match(ra,rb,mstart,rc,rd,re,rdepth+1); \
    printf("to line %d\n", __LINE__); \
    }
  #define RRETURN(ra) \
    { \
    printf("match() returned %d from line %d ", ra, __LINE__); \
    return ra; \
    }
  #else
  #define RMATCH(ra,rb,rc,rd,re,rw) \
    rrc = match(ra,rb,mstart,rc,rd,re,rdepth+1)
  #define RRETURN(ra) return ra
  #endif
  
  #else
  
  
  /* These versions of the macros manage a private stack on the heap. Note that
  the "rd" argument of RMATCH isn't actually used in this definition. It's the md
  argument of match(), which never changes. */
  
  #define REGISTER
  
  #define RMATCH(ra,rb,rc,rd,re,rw)\
    {\
    heapframe *newframe = frame->Xnextframe;\
    if (newframe == NULL)\
      {\
      newframe = (heapframe *)(PUBL(stack_malloc))(sizeof(heapframe));\
      if (newframe == NULL) RRETURN(PCRE_ERROR_NOMEMORY);\
      newframe->Xnextframe = NULL;\
      frame->Xnextframe = newframe;\
      }\
    frame->Xwhere = rw;\
    newframe->Xeptr = ra;\
    newframe->Xecode = rb;\
    newframe->Xmstart = mstart;\
    newframe->Xoffset_top = rc;\
    newframe->Xeptrb = re;\
    newframe->Xrdepth = frame->Xrdepth + 1;\
    newframe->Xprevframe = frame;\
    frame = newframe;\
    DPRINTF(("restarting from line %d\n", __LINE__));\
    goto HEAP_RECURSE;\
    L_##rw:\
    DPRINTF(("jumped back to line %d\n", __LINE__));\
    }
  
  #define RRETURN(ra)\
    {\
    heapframe *oldframe = frame;\
    frame = oldframe->Xprevframe;\
    if (frame != NULL)\
      {\
      rrc = ra;\
      goto HEAP_RETURN;\
      }\
    return ra;\
    }
  
  
  /* Structure for remembering the local variables in a private frame */
  
  typedef struct heapframe {
    struct heapframe *Xprevframe;
    struct heapframe *Xnextframe;
  
    /* Function arguments that may change */
  
    PCRE_PUCHAR Xeptr;
    const pcre_uchar *Xecode;
    PCRE_PUCHAR Xmstart;
    int Xoffset_top;
    eptrblock *Xeptrb;
    unsigned int Xrdepth;
  
    /* Function local variables */
  
    PCRE_PUCHAR Xcallpat;
  #ifdef SUPPORT_UTF
    PCRE_PUCHAR Xcharptr;
  #endif
    PCRE_PUCHAR Xdata;
    PCRE_PUCHAR Xnext;
    PCRE_PUCHAR Xpp;
    PCRE_PUCHAR Xprev;
    PCRE_PUCHAR Xsaved_eptr;
  
    recursion_info Xnew_recursive;
  
    BOOL Xcur_is_word;
    BOOL Xcondition;
    BOOL Xprev_is_word;
  
  #ifdef SUPPORT_UCP
    int Xprop_type;
    int Xprop_value;
    int Xprop_fail_result;
    int Xoclength;
    pcre_uchar Xocchars[6];
  #endif
  
    int Xcodelink;
    int Xctype;
    unsigned int Xfc;
    int Xfi;
    int Xlength;
    int Xmax;
    int Xmin;
    int Xnumber;
    int Xoffset;
    int Xop;
    int Xsave_capture_last;
    int Xsave_offset1, Xsave_offset2, Xsave_offset3;
    int Xstacksave[REC_STACK_SAVE_MAX];
  
    eptrblock Xnewptrb;
  
    /* Where to jump back to */
  
    int Xwhere;
  
  } heapframe;
  
  #endif
  
  
  /***************************************************************************
  ***************************************************************************/
  
  
  
  /*************************************************
  *         Match from current position            *
  *************************************************/
  
  /* This function is called recursively in many circumstances. Whenever it
  returns a negative (error) response, the outer incarnation must also return the
  same response. */
  
  /* These macros pack up tests that are used for partial matching, and which
  appear several times in the code. We set the "hit end" flag if the pointer is
  at the end of the subject and also past the start of the subject (i.e.
  something has been matched). For hard partial matching, we then return
  immediately. The second one is used when we already know we are past the end of
  the subject. */
  
  #define CHECK_PARTIAL()\
    if (md->partial != 0 && eptr >= md->end_subject && \
        eptr > md->start_used_ptr) \
      { \
      md->hitend = TRUE; \
      if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL); \
      }
  
  #define SCHECK_PARTIAL()\
    if (md->partial != 0 && eptr > md->start_used_ptr) \
      { \
      md->hitend = TRUE; \
      if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL); \
      }
  
  
  /* Performance note: It might be tempting to extract commonly used fields from
  the md structure (e.g. utf, end_subject) into individual variables to improve
  performance. Tests using gcc on a SPARC disproved this; in the first case, it
  made performance worse.
  
  Arguments:
     eptr        pointer to current character in subject
     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
     eptrb       pointer to chain of blocks containing eptr at start of
                   brackets - for testing for empty matches
     rdepth      the recursion depth
  
  Returns:       MATCH_MATCH if matched            )  these values are >= 0
                 MATCH_NOMATCH if failed to match  )
                 a negative MATCH_xxx value for PRUNE, SKIP, etc
                 a negative PCRE_ERROR_xxx value if aborted by an error condition
                   (e.g. stopped by repeated call or recursion limit)
  */
  
  static int
  match(REGISTER PCRE_PUCHAR eptr, REGISTER const pcre_uchar *ecode,
    PCRE_PUCHAR mstart, int offset_top, match_data *md, eptrblock *eptrb,
    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 some of them with
  "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 utf;         /* Local copy of UTF flag for speed */
  
  BOOL minimize, possessive; /* Quantifier options */
  BOOL caseless;
  int condcode;
  
  /* When recursion is not being used, all "local" variables that have to be
  preserved over calls to RMATCH() are part of a "frame". We set up the top-level
  frame on the stack here; subsequent instantiations are obtained from the heap
  whenever RMATCH() does a "recursion". See the macro definitions above. Putting
  the top-level on the stack rather than malloc-ing them all gives a performance
  boost in many cases where there is not much "recursion". */
  
  #ifdef NO_RECURSE
  heapframe *frame = (heapframe *)md->match_frames_base;
  
  /* Copy in the original argument variables */
  
  frame->Xeptr = eptr;
  frame->Xecode = ecode;
  frame->Xmstart = mstart;
  frame->Xoffset_top = offset_top;
  frame->Xeptrb = eptrb;
  frame->Xrdepth = rdepth;
  
  /* This is where control jumps back to to effect "recursion" */
  
  HEAP_RECURSE:
  
  /* Macros make the argument variables come from the current frame */
  
  #define eptr               frame->Xeptr
  #define ecode              frame->Xecode
  #define mstart             frame->Xmstart
  #define offset_top         frame->Xoffset_top
  #define eptrb              frame->Xeptrb
  #define rdepth             frame->Xrdepth
  
  /* Ditto for the local variables */
  
  #ifdef SUPPORT_UTF
  #define charptr            frame->Xcharptr
  #endif
  #define callpat            frame->Xcallpat
  #define codelink           frame->Xcodelink
  #define data               frame->Xdata
  #define next               frame->Xnext
  #define pp                 frame->Xpp
  #define prev               frame->Xprev
  #define saved_eptr         frame->Xsaved_eptr
  
  #define new_recursive      frame->Xnew_recursive
  
  #define cur_is_word        frame->Xcur_is_word
  #define condition          frame->Xcondition
  #define prev_is_word       frame->Xprev_is_word
  
  #ifdef SUPPORT_UCP
  #define prop_type          frame->Xprop_type
  #define prop_value         frame->Xprop_value
  #define prop_fail_result   frame->Xprop_fail_result
  #define oclength           frame->Xoclength
  #define occhars            frame->Xocchars
  #endif
  
  #define ctype              frame->Xctype
  #define fc                 frame->Xfc
  #define fi                 frame->Xfi
  #define length             frame->Xlength
  #define max                frame->Xmax
  #define min                frame->Xmin
  #define number             frame->Xnumber
  #define offset             frame->Xoffset
  #define op                 frame->Xop
  #define save_capture_last  frame->Xsave_capture_last
  #define save_offset1       frame->Xsave_offset1
  #define save_offset2       frame->Xsave_offset2
  #define save_offset3       frame->Xsave_offset3
  #define stacksave          frame->Xstacksave
  
  #define newptrb            frame->Xnewptrb
  
  /* When recursion is being used, local variables are allocated on the stack and
  get preserved during recursion in the normal way. In this environment, fi and
  i, and fc and c, can be the same variables. */
  
  #else         /* NO_RECURSE not defined */
  #define fi i
  #define fc c
  
  /* Many of the following variables are used only in small blocks of the code.
  My normal style of coding would have declared them within each of those blocks.
  However, in order to accommodate the version of this code that uses an external
  "stack" implemented on the heap, it is easier to declare them all here, so the
  declarations can be cut out in a block. The only declarations within blocks
  below are for variables that do not have to be preserved over a recursive call
  to RMATCH(). */
  
  #ifdef SUPPORT_UTF
  const pcre_uchar *charptr;
  #endif
  const pcre_uchar *callpat;
  const pcre_uchar *data;
  const pcre_uchar *next;
  PCRE_PUCHAR       pp;
  const pcre_uchar *prev;
  PCRE_PUCHAR       saved_eptr;
  
  recursion_info new_recursive;
  
  BOOL cur_is_word;
  BOOL condition;
  BOOL prev_is_word;
  
  #ifdef SUPPORT_UCP
  int prop_type;
  int prop_value;
  int prop_fail_result;
  int oclength;
  pcre_uchar occhars[6];
  #endif
  
  int codelink;
  int ctype;
  int length;
  int max;
  int min;
  int number;
  int offset;
  int op;
  int save_capture_last;
  int save_offset1, save_offset2, save_offset3;
  int stacksave[REC_STACK_SAVE_MAX];
  
  eptrblock newptrb;
  
  /* There is a special fudge for calling match() in a way that causes it to
  measure the size of its basic stack frame when the stack is being used for
  recursion. The second argument (ecode) being NULL triggers this behaviour. It
  cannot normally ever be NULL. The return is the negated value of the frame
  size. */
  
  if (ecode == NULL)
    {
    if (rdepth == 0)
      return match((PCRE_PUCHAR)&rdepth, NULL, NULL, 0, NULL, NULL, 1);
    else
      {
      int len = (char *)&rdepth - (char *)eptr;
      return (len > 0)? -len : len;
      }
    }
  #endif     /* NO_RECURSE */
  
  /* To save space on the stack and in the heap frame, I have doubled up on some
  of the local variables that are used only in localised parts of the code, but
  still need to be preserved over recursive calls of match(). These macros define
  the alternative names that are used. */
  
  #define allow_zero    cur_is_word
  #define cbegroup      condition
  #define code_offset   codelink
  #define condassert    condition
  #define matched_once  prev_is_word
  #define foc           number
  #define save_mark     data
  
  /* These statements are here to stop the compiler complaining about unitialized
  variables. */
  
  #ifdef SUPPORT_UCP
  prop_value = 0;
  prop_fail_result = 0;
  #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()
  and a "return", respectively (possibly with some debugging if PCRE_DEBUG is
  defined). However, RMATCH isn't like a function call because it's quite a
  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_UTF
  utf = md->utf;       /* Local copy of the flag */
  #else
  utf = FALSE;
  #endif
  
  /* First check that we haven't called match() too many times, or that we
  haven't exceeded the recursive call limit. */
  
  if (md->match_call_count++ >= md->match_limit) RRETURN(PCRE_ERROR_MATCHLIMIT);
  if (rdepth >= md->match_limit_recursion) RRETURN(PCRE_ERROR_RECURSIONLIMIT);
  
  /* At the start of a group with an unlimited repeat that may match an empty
  string, the variable md->match_function_type is set to MATCH_CBEGROUP. It is
  done this way to save having to use another function argument, which would take
  up space on the stack. See also MATCH_CONDASSERT below.
  
  When MATCH_CBEGROUP is set, add the current subject pointer to the chain of
  such remembered pointers, to be checked when we 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 feature 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 (md->match_function_type == MATCH_CBEGROUP)
    {
    newptrb.epb_saved_eptr = eptr;
    newptrb.epb_prev = eptrb;
    eptrb = &newptrb;
    md->match_function_type = 0;
    }
  
  /* Now start processing the opcodes. */
  
  for (;;)
    {
    minimize = possessive = FALSE;
    op = *ecode;
  
    switch(op)
      {
      case OP_MARK:
      md->nomatch_mark = ecode + 2;
      md->mark = NULL;    /* In case previously set by assertion */
      RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode] + ecode[1], offset_top, md,
        eptrb, RM55);
      if ((rrc == MATCH_MATCH || rrc == MATCH_ACCEPT) &&
           md->mark == NULL) md->mark = ecode + 2;
  
      /* A return of MATCH_SKIP_ARG means that matching failed at SKIP with an
      argument, and we must check whether that argument matches this MARK's
      argument. It is passed back in md->start_match_ptr (an overloading of that
      variable). If it does match, we reset that variable to the current subject
      position and return MATCH_SKIP. Otherwise, pass back the return code
      unaltered. */
  
      else if (rrc == MATCH_SKIP_ARG &&
          STRCMP_UC_UC(ecode + 2, md->start_match_ptr) == 0)
        {
        md->start_match_ptr = eptr;
        RRETURN(MATCH_SKIP);
        }
      RRETURN(rrc);
  
      case OP_FAIL:
      RRETURN(MATCH_NOMATCH);
  
      /* COMMIT overrides PRUNE, SKIP, and THEN */
  
      case OP_COMMIT:
      RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, md,
        eptrb, RM52);
      if (rrc != MATCH_NOMATCH && rrc != MATCH_PRUNE &&
          rrc != MATCH_SKIP && rrc != MATCH_SKIP_ARG &&
          rrc != MATCH_THEN)
        RRETURN(rrc);
      RRETURN(MATCH_COMMIT);
  
      /* PRUNE overrides THEN */
  
      case OP_PRUNE:
      RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, md,
        eptrb, RM51);
      if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) RRETURN(rrc);
      RRETURN(MATCH_PRUNE);
  
      case OP_PRUNE_ARG:
      md->nomatch_mark = ecode + 2;
      md->mark = NULL;    /* In case previously set by assertion */
      RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode] + ecode[1], offset_top, md,
        eptrb, RM56);
      if ((rrc == MATCH_MATCH || rrc == MATCH_ACCEPT) &&
           md->mark == NULL) md->mark = ecode + 2;
      if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) RRETURN(rrc);
      RRETURN(MATCH_PRUNE);
  
      /* SKIP overrides PRUNE and THEN */
  
      case OP_SKIP:
      RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, md,
        eptrb, RM53);
      if (rrc != MATCH_NOMATCH && rrc != MATCH_PRUNE && rrc != MATCH_THEN)
        RRETURN(rrc);
      md->start_match_ptr = eptr;   /* Pass back current position */
      RRETURN(MATCH_SKIP);
  
      /* Note that, for Perl compatibility, SKIP with an argument does NOT set
      nomatch_mark. There is a flag that disables this opcode when re-matching a
      pattern that ended with a SKIP for which there was not a matching MARK. */
  
      case OP_SKIP_ARG:
      if (md->ignore_skip_arg)
        {
        ecode += PRIV(OP_lengths)[*ecode] + ecode[1];
        break;
        }
      RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode] + ecode[1], offset_top, md,
        eptrb, RM57);
      if (rrc != MATCH_NOMATCH && rrc != MATCH_PRUNE && rrc != MATCH_THEN)
        RRETURN(rrc);
  
      /* Pass back the current skip name by overloading md->start_match_ptr and
      returning the special MATCH_SKIP_ARG return code. This will either be
      caught by a matching MARK, or get to the top, where it causes a rematch
      with the md->ignore_skip_arg flag set. */
  
      md->start_match_ptr = ecode + 2;
      RRETURN(MATCH_SKIP_ARG);
  
      /* For THEN (and THEN_ARG) we pass back the address of the opcode, so that
      the branch in which it occurs can be determined. Overload the start of
      match pointer to do this. */
  
      case OP_THEN:
      RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, md,
        eptrb, RM54);
      if (rrc != MATCH_NOMATCH) RRETURN(rrc);
      md->start_match_ptr = ecode;
      RRETURN(MATCH_THEN);
  
      case OP_THEN_ARG:
      md->nomatch_mark = ecode + 2;
      md->mark = NULL;    /* In case previously set by assertion */
      RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode] + ecode[1], offset_top,
        md, eptrb, RM58);
      if ((rrc == MATCH_MATCH || rrc == MATCH_ACCEPT) &&
           md->mark == NULL) md->mark = ecode + 2;
      if (rrc != MATCH_NOMATCH) RRETURN(rrc);
      md->start_match_ptr = ecode;
      RRETURN(MATCH_THEN);
  
      /* Handle an atomic group that does not contain any capturing parentheses.
      This can be handled like an assertion. Prior to 8.13, all atomic groups
      were handled this way. In 8.13, the code was changed as below for ONCE, so
      that backups pass through the group and thereby reset captured values.
      However, this uses a lot more stack, so in 8.20, atomic groups that do not
      contain any captures generate OP_ONCE_NC, which can be handled in the old,
      less stack intensive way.
  
      Check the alternative branches in turn - the matching won't pass the KET
      for this kind of subpattern. If any one branch matches, we carry on as at
      the end of a normal bracket, leaving the subject pointer, but resetting
      the start-of-match value in case it was changed by \K. */
  
      case OP_ONCE_NC:
      prev = ecode;
      saved_eptr = eptr;
      save_mark = md->mark;
      do
        {
        RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, eptrb, RM64);
        if (rrc == MATCH_MATCH)  /* Note: _not_ MATCH_ACCEPT */
          {
          mstart = md->start_match_ptr;
          break;
          }
        if (rrc == MATCH_THEN)
          {
          next = ecode + GET(ecode,1);
          if (md->start_match_ptr < next &&
              (*ecode == OP_ALT || *next == OP_ALT))
            rrc = MATCH_NOMATCH;
          }
  
        if (rrc != MATCH_NOMATCH) RRETURN(rrc);
        ecode += GET(ecode,1);
        md->mark = save_mark;
        }
      while (*ecode == OP_ALT);
  
      /* If hit the end of the group (which could be repeated), fail */
  
      if (*ecode != OP_ONCE_NC && *ecode != OP_ALT) RRETURN(MATCH_NOMATCH);
  
      /* Continue as from after the group, updating the offsets high water
      mark, since extracts may have been taken. */
  
      do ecode += GET(ecode, 1); while (*ecode == OP_ALT);
  
      offset_top = md->end_offset_top;
      eptr = md->end_match_ptr;
  
      /* 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.
      This is the forcible breaking of infinite loops as implemented in Perl
      5.005. */
  
      if (*ecode == OP_KET || eptr == saved_eptr)
        {
        ecode += 1+LINK_SIZE;
        break;
        }
  
      /* The repeating kets try the rest of the pattern or restart from the
      preceding bracket, in the appropriate order. The second "call" of match()
      uses tail recursion, to avoid using another stack frame. */
  
      if (*ecode == OP_KETRMIN)
        {
        RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, eptrb, RM65);
        if (rrc != MATCH_NOMATCH) RRETURN(rrc);
        ecode = prev;
        goto TAIL_RECURSE;
        }
      else  /* OP_KETRMAX */
        {
        RMATCH(eptr, prev, offset_top, md, eptrb, RM66);
        if (rrc != MATCH_NOMATCH) RRETURN(rrc);
        ecode += 1 + LINK_SIZE;
        goto TAIL_RECURSE;
        }
      /* Control never gets here */
  
      /* Handle a capturing bracket, other than those that are possessive with an
      unlimited repeat. 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. A failure to match might occur after the group has succeeded,
      if something later on doesn't match. For this reason, we need to restore
      the working 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 PCRE_DEBUG
      printf("start bracket %d\n", number);
      printf("subject=");
      pchars(eptr, 16, TRUE, md);
      printf("\n");
  #endif
  
      if (offset < md->offset_max)
        {
        save_offset1 = md->offset_vector[offset];
        save_offset2 = md->offset_vector[offset+1];
        save_offset3 = md->offset_vector[md->offset_end - number];
        save_capture_last = md->capture_last;
        save_mark = md->mark;
  
        DPRINTF(("saving %d %d %d\n", save_offset1, save_offset2, save_offset3));
        md->offset_vector[md->offset_end - number] =
          (int)(eptr - md->start_subject);
  
        for (;;)
          {
          if (op >= OP_SBRA) md->match_function_type = MATCH_CBEGROUP;
          RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, md,
            eptrb, RM1);
          if (rrc == MATCH_ONCE) break;  /* Backing up through an atomic group */
  
          /* If we backed up to a THEN, check whether it is within the current
          branch by comparing the address of the THEN that is passed back with
          the end of the branch. If it is within the current branch, and the
          branch is one of two or more alternatives (it either starts or ends
          with OP_ALT), we have reached the limit of THEN's action, so convert
          the return code to NOMATCH, which will cause normal backtracking to
          happen from now on. Otherwise, THEN is passed back to an outer
          alternative. This implements Perl's treatment of parenthesized groups,
          where a group not containing | does not affect the current alternative,
          that is, (X) is NOT the same as (X|(*F)). */
  
          if (rrc == MATCH_THEN)
            {
            next = ecode + GET(ecode,1);
            if (md->start_match_ptr < next &&
                (*ecode == OP_ALT || *next == OP_ALT))
              rrc = MATCH_NOMATCH;
            }
  
          /* Anything other than NOMATCH is passed back. */
  
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          md->capture_last = save_capture_last;
          ecode += GET(ecode, 1);
          md->mark = save_mark;
          if (*ecode != OP_ALT) break;
          }
  
        DPRINTF(("bracket %d failed\n", number));
        md->offset_vector[offset] = save_offset1;
        md->offset_vector[offset+1] = save_offset2;
        md->offset_vector[md->offset_end - number] = save_offset3;
  
        /* At this point, rrc will be one of MATCH_ONCE or MATCH_NOMATCH. */
  
        RRETURN(rrc);
        }
  
      /* FALL THROUGH ... Insufficient room for saving captured contents. Treat
      as a non-capturing bracket. */
  
      /* VVVVVVVVVVVVVVVVVVVVVVVVV */
      /* VVVVVVVVVVVVVVVVVVVVVVVVV */
  
      DPRINTF(("insufficient capture room: treat as non-capturing\n"));
  
      /* VVVVVVVVVVVVVVVVVVVVVVVVV */
      /* VVVVVVVVVVVVVVVVVVVVVVVVV */
  
      /* Non-capturing or atomic group, except for possessive with unlimited
      repeat and ONCE group with no captures. Loop for all the alternatives.
  
      When we get to the final alternative within the brackets, we used to return
      the result of a recursive call to match() whatever happened so it was
      possible to reduce stack usage by turning this into a tail recursion,
      except in the case of a possibly empty group. However, now that there is
      the possiblity of (*THEN) occurring in the final alternative, this
      optimization is no longer always possible.
  
      We can optimize if we know there are no (*THEN)s in the pattern; at present
      this is the best that can be done.
  
      MATCH_ONCE is returned when the end of an atomic group is successfully
      reached, but subsequent matching fails. It passes back up the tree (causing
      captured values to be reset) until the original atomic group level is
      reached. This is tested by comparing md->once_target with the start of the
      group. At this point, the return is converted into MATCH_NOMATCH so that
      previous backup points can be taken. */
  
      case OP_ONCE:
      case OP_BRA:
      case OP_SBRA:
      DPRINTF(("start non-capturing bracket\n"));
  
      for (;;)
        {
        if (op >= OP_SBRA || op == OP_ONCE)
          md->match_function_type = MATCH_CBEGROUP;
  
        /* If this is not a possibly empty group, and there are no (*THEN)s in
        the pattern, and this is the final alternative, optimize as described
        above. */
  
        else if (!md->hasthen && ecode[GET(ecode, 1)] != OP_ALT)
          {
          ecode += PRIV(OP_lengths)[*ecode];
          goto TAIL_RECURSE;
          }
  
        /* In all other cases, we have to make another call to match(). */
  
        save_mark = md->mark;
        RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, md, eptrb,
          RM2);
  
        /* See comment in the code for capturing groups above about handling
        THEN. */
  
        if (rrc == MATCH_THEN)
          {
          next = ecode + GET(ecode,1);
          if (md->start_match_ptr < next &&
              (*ecode == OP_ALT || *next == OP_ALT))
            rrc = MATCH_NOMATCH;
          }
  
        if (rrc != MATCH_NOMATCH)
          {
          if (rrc == MATCH_ONCE)
            {
            const pcre_uchar *scode = ecode;
            if (*scode != OP_ONCE)           /* If not at start, find it */
              {
              while (*scode == OP_ALT) scode += GET(scode, 1);
              scode -= GET(scode, 1);
              }
            if (md->once_target == scode) rrc = MATCH_NOMATCH;
            }
          RRETURN(rrc);
          }
        ecode += GET(ecode, 1);
        md->mark = save_mark;
        if (*ecode != OP_ALT) break;
        }
  
      RRETURN(MATCH_NOMATCH);
  
      /* Handle possessive capturing brackets with an unlimited repeat. We come
      here from BRAZERO with allow_zero set TRUE. The offset_vector values are
      handled similarly to the normal case above. However, the matching is
      different. The end of these brackets will always be OP_KETRPOS, which
      returns MATCH_KETRPOS without going further in the pattern. By this means
      we can handle the group by iteration rather than recursion, thereby
      reducing the amount of stack needed. */
  
      case OP_CBRAPOS:
      case OP_SCBRAPOS:
      allow_zero = FALSE;
  
      POSSESSIVE_CAPTURE:
      number = GET2(ecode, 1+LINK_SIZE);
      offset = number << 1;
  
  #ifdef PCRE_DEBUG
      printf("start possessive bracket %d\n", number);
      printf("subject=");
      pchars(eptr, 16, TRUE, md);
      printf("\n");
  #endif
  
      if (offset < md->offset_max)
        {
        matched_once = FALSE;
        code_offset = (int)(ecode - md->start_code);
  
        save_offset1 = md->offset_vector[offset];
        save_offset2 = md->offset_vector[offset+1];
        save_offset3 = md->offset_vector[md->offset_end - number];
        save_capture_last = md->capture_last;
  
        DPRINTF(("saving %d %d %d\n", save_offset1, save_offset2, save_offset3));
  
        /* Each time round the loop, save the current subject position for use
        when the group matches. For MATCH_MATCH, the group has matched, so we
        restart it with a new subject starting position, remembering that we had
        at least one match. For MATCH_NOMATCH, carry on with the alternatives, as
        usual. If we haven't matched any alternatives in any iteration, check to
        see if a previous iteration matched. If so, the group has matched;
        continue from afterwards. Otherwise it has failed; restore the previous
        capture values before returning NOMATCH. */
  
        for (;;)
          {
          md->offset_vector[md->offset_end - number] =
            (int)(eptr - md->start_subject);
          if (op >= OP_SBRA) md->match_function_type = MATCH_CBEGROUP;
          RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, md,
            eptrb, RM63);
          if (rrc == MATCH_KETRPOS)
            {
            offset_top = md->end_offset_top;
            eptr = md->end_match_ptr;
            ecode = md->start_code + code_offset;
            save_capture_last = md->capture_last;
            matched_once = TRUE;
            continue;
            }
  
          /* See comment in the code for capturing groups above about handling
          THEN. */
  
          if (rrc == MATCH_THEN)
            {
            next = ecode + GET(ecode,1);
            if (md->start_match_ptr < next &&
                (*ecode == OP_ALT || *next == OP_ALT))
              rrc = MATCH_NOMATCH;
            }
  
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          md->capture_last = save_capture_last;
          ecode += GET(ecode, 1);
          if (*ecode != OP_ALT) break;
          }
  
        if (!matched_once)
          {
          md->offset_vector[offset] = save_offset1;
          md->offset_vector[offset+1] = save_offset2;
          md->offset_vector[md->offset_end - number] = save_offset3;
          }
  
        if (allow_zero || matched_once)
          {
          ecode += 1 + LINK_SIZE;
          break;
          }
  
        RRETURN(MATCH_NOMATCH);
        }
  
      /* FALL THROUGH ... Insufficient room for saving captured contents. Treat
      as a non-capturing bracket. */
  
      /* VVVVVVVVVVVVVVVVVVVVVVVVV */
      /* VVVVVVVVVVVVVVVVVVVVVVVVV */
  
      DPRINTF(("insufficient capture room: treat as non-capturing\n"));
  
      /* VVVVVVVVVVVVVVVVVVVVVVVVV */
      /* VVVVVVVVVVVVVVVVVVVVVVVVV */
  
      /* Non-capturing possessive bracket with unlimited repeat. We come here
      from BRAZERO with allow_zero = TRUE. The code is similar to the above,
      without the capturing complication. It is written out separately for speed
      and cleanliness. */
  
      case OP_BRAPOS:
      case OP_SBRAPOS:
      allow_zero = FALSE;
  
      POSSESSIVE_NON_CAPTURE:
      matched_once = FALSE;
      code_offset = (int)(ecode - md->start_code);
  
      for (;;)
        {
        if (op >= OP_SBRA) md->match_function_type = MATCH_CBEGROUP;
        RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, md,
          eptrb, RM48);
        if (rrc == MATCH_KETRPOS)
          {
          offset_top = md->end_offset_top;
          eptr = md->end_match_ptr;
          ecode = md->start_code + code_offset;
          matched_once = TRUE;
          continue;
          }
  
        /* See comment in the code for capturing groups above about handling
        THEN. */
  
        if (rrc == MATCH_THEN)
          {
          next = ecode + GET(ecode,1);
          if (md->start_match_ptr < next &&
              (*ecode == OP_ALT || *next == OP_ALT))
            rrc = MATCH_NOMATCH;
          }
  
        if (rrc != MATCH_NOMATCH) RRETURN(rrc);
        ecode += GET(ecode, 1);
        if (*ecode != OP_ALT) break;
        }
  
      if (matched_once || allow_zero)
        {
        ecode += 1 + LINK_SIZE;
        break;
        }
      RRETURN(MATCH_NOMATCH);
  
      /* Control never reaches here. */
  
      /* 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. */
  
      case OP_COND:
      case OP_SCOND:
      codelink = GET(ecode, 1);
  
      /* Because of the way auto-callout works during compile, a callout item is
      inserted between OP_COND and an assertion condition. */
  
      if (ecode[LINK_SIZE+1] == OP_CALLOUT)
        {
        if (PUBL(callout) != NULL)
          {
          PUBL(callout_block) cb;
          cb.version          = 2;   /* Version 1 of the callout block */
          cb.callout_number   = ecode[LINK_SIZE+2];
          cb.offset_vector    = md->offset_vector;
  #ifdef COMPILE_PCRE8
          cb.subject          = (PCRE_SPTR)md->start_subject;
  #else
          cb.subject          = (PCRE_SPTR16)md->start_subject;
  #endif
          cb.subject_length   = (int)(md->end_subject - md->start_subject);
          cb.start_match      = (int)(mstart - md->start_subject);
          cb.current_position = (int)(eptr - md->start_subject);
          cb.pattern_position = GET(ecode, LINK_SIZE + 3);
          cb.next_item_length = GET(ecode, 3 + 2*LINK_SIZE);
          cb.capture_top      = offset_top/2;
          cb.capture_last     = md->capture_last;
          cb.callout_data     = md->callout_data;
          cb.mark             = md->nomatch_mark;
          if ((rrc = (*PUBL(callout))(&cb)) > 0) RRETURN(MATCH_NOMATCH);
          if (rrc < 0) RRETURN(rrc);
          }
        ecode += PRIV(OP_lengths)[OP_CALLOUT];
        }
  
      condcode = ecode[LINK_SIZE+1];
  
      /* Now see what the actual condition is */
  
      if (condcode == OP_RREF || condcode == OP_NRREF)    /* Recursion test */
        {
        if (md->recursive == NULL)                /* Not recursing => FALSE */
          {
          condition = FALSE;
          ecode += GET(ecode, 1);
          }
        else
          {
          int recno = GET2(ecode, LINK_SIZE + 2);   /* Recursion group number*/
          condition = (recno == RREF_ANY || recno == md->recursive->group_num);
  
          /* If the test is for recursion into a specific subpattern, and it is
          false, but the test was set up by name, scan the table to see if the
          name refers to any other numbers, and test them. The condition is true
          if any one is set. */
  
          if (!condition && condcode == OP_NRREF)
            {
            pcre_uchar *slotA = md->name_table;
            for (i = 0; i < md->name_count; i++)
              {
              if (GET2(slotA, 0) == recno) break;
              slotA += md->name_entry_size;
              }
  
            /* Found a name for the number - there can be only one; duplicate
            names for different numbers are allowed, but not vice versa. First
            scan down for duplicates. */
  
            if (i < md->name_count)
              {
              pcre_uchar *slotB = slotA;
              while (slotB > md->name_table)
                {
                slotB -= md->name_entry_size;
                if (STRCMP_UC_UC(slotA + IMM2_SIZE, slotB + IMM2_SIZE) == 0)
                  {
                  condition = GET2(slotB, 0) == md->recursive->group_num;
                  if (condition) break;
                  }
                else break;
                }
  
              /* Scan up for duplicates */
  
              if (!condition)
                {
                slotB = slotA;
                for (i++; i < md->name_count; i++)
                  {
                  slotB += md->name_entry_size;
                  if (STRCMP_UC_UC(slotA + IMM2_SIZE, slotB + IMM2_SIZE) == 0)
                    {
                    condition = GET2(slotB, 0) == md->recursive->group_num;
                    if (condition) break;
                    }
                  else break;
                  }
                }
              }
            }
  
          /* Chose branch according to the condition */
  
          ecode += condition? 1 + IMM2_SIZE : GET(ecode, 1);
          }
        }
  
      else if (condcode == OP_CREF || condcode == OP_NCREF)  /* Group used test */
        {
        offset = GET2(ecode, LINK_SIZE+2) << 1;  /* Doubled ref number */
        condition = offset < offset_top && md->offset_vector[offset] >= 0;
  
        /* If the numbered capture is unset, but the reference was by name,
        scan the table to see if the name refers to any other numbers, and test
        them. The condition is true if any one is set. This is tediously similar
        to the code above, but not close enough to try to amalgamate. */
  
        if (!condition && condcode == OP_NCREF)
          {
          int refno = offset >> 1;
          pcre_uchar *slotA = md->name_table;
  
          for (i = 0; i < md->name_count; i++)
            {
            if (GET2(slotA, 0) == refno) break;
            slotA += md->name_entry_size;
            }
  
          /* Found a name for the number - there can be only one; duplicate names
          for different numbers are allowed, but not vice versa. First scan down
          for duplicates. */
  
          if (i < md->name_count)
            {
            pcre_uchar *slotB = slotA;
            while (slotB > md->name_table)
              {
              slotB -= md->name_entry_size;
              if (STRCMP_UC_UC(slotA + IMM2_SIZE, slotB + IMM2_SIZE) == 0)
                {
                offset = GET2(slotB, 0) << 1;
                condition = offset < offset_top &&
                  md->offset_vector[offset] >= 0;
                if (condition) break;
                }
              else break;
              }
  
            /* Scan up for duplicates */
  
            if (!condition)
              {
              slotB = slotA;
              for (i++; i < md->name_count; i++)
                {
                slotB += md->name_entry_size;
                if (STRCMP_UC_UC(slotA + IMM2_SIZE, slotB + IMM2_SIZE) == 0)
                  {
                  offset = GET2(slotB, 0) << 1;
                  condition = offset < offset_top &&
                    md->offset_vector[offset] >= 0;
                  if (condition) break;
                  }
                else break;
                }
              }
            }
          }
  
        /* Chose branch according to the condition */
  
        ecode += condition? 1 + IMM2_SIZE : GET(ecode, 1);
        }
  
      else if (condcode == OP_DEF)     /* DEFINE - always false */
        {
        condition = FALSE;
        ecode += GET(ecode, 1);
        }
  
      /* The condition is an assertion. Call match() to evaluate it - setting
      md->match_function_type to MATCH_CONDASSERT causes it to stop at the end of
      an assertion. */
  
      else
        {
        md->match_function_type = MATCH_CONDASSERT;
        RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, NULL, RM3);
        if (rrc == MATCH_MATCH)
          {
          if (md->end_offset_top > offset_top)
            offset_top = md->end_offset_top;  /* Captures may have happened */
          condition = TRUE;
          ecode += 1 + LINK_SIZE + GET(ecode, LINK_SIZE + 2);
          while (*ecode == OP_ALT) ecode += GET(ecode, 1);
          }
  
        /* PCRE doesn't allow the effect of (*THEN) to escape beyond an
        assertion; it is therefore treated as NOMATCH. */
  
        else if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN)
          {
          RRETURN(rrc);         /* Need braces because of following else */
          }
        else
          {
          condition = FALSE;
          ecode += codelink;
          }
        }
  
      /* We are now at the branch that is to be obeyed. As there is only one, can
      use tail recursion to avoid using another stack frame, except when there is
      unlimited repeat of a possibly empty group. In the latter case, a recursive
      call to match() is always required, unless the second alternative doesn't
      exist, in which case we can just plough on. Note that, for compatibility
      with Perl, the | in a conditional group is NOT treated as creating two
      alternatives. If a THEN is encountered in the branch, it propagates out to
      the enclosing alternative (unless nested in a deeper set of alternatives,
      of course). */
  
      if (condition || *ecode == OP_ALT)
        {
        if (op != OP_SCOND)
          {
          ecode += 1 + LINK_SIZE;
          goto TAIL_RECURSE;
          }
  
        md->match_function_type = MATCH_CBEGROUP;
        RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, eptrb, RM49);
        RRETURN(rrc);
        }
  
       /* Condition false & no alternative; continue after the group. */
  
      else
        {
        ecode += 1 + LINK_SIZE;
        }
      break;
  
  
      /* Before OP_ACCEPT there may be any number of OP_CLOSE opcodes,
      to close any currently open capturing brackets. */
  
      case OP_CLOSE:
      number = GET2(ecode, 1);
      offset = number << 1;
  
  #ifdef PCRE_DEBUG
        printf("end bracket %d at *ACCEPT", number);
        printf("\n");
  #endif
  
      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] = (int)(eptr - md->start_subject);
        if (offset_top <= offset) offset_top = offset + 2;
        }
      ecode += 1 + IMM2_SIZE;
      break;
  
  
      /* End of the pattern, either real or forced. */
  
      case OP_END:
      case OP_ACCEPT:
      case OP_ASSERT_ACCEPT:
  
      /* If we have matched an empty string, fail if not in an assertion and not
      in a recursion if either PCRE_NOTEMPTY is set, or if PCRE_NOTEMPTY_ATSTART
      is set and we have matched at the start of the subject. In both cases,
      backtracking will then try other alternatives, if any. */
  
      if (eptr == mstart && op != OP_ASSERT_ACCEPT &&
           md->recursive == NULL &&
           (md->notempty ||
             (md->notempty_atstart &&
               mstart == md->start_subject + md->start_offset)))
        RRETURN(MATCH_NOMATCH);
  
      /* Otherwise, we have a match. */
  
      md->end_match_ptr = eptr;           /* Record where we ended */
      md->end_offset_top = offset_top;    /* and how many extracts were taken */
      md->start_match_ptr = mstart;       /* and the start (\K can modify) */
  
      /* For some reason, the macros don't work properly if an expression is
      given as the argument to RRETURN when the heap is in use. */
  
      rrc = (op == OP_END)? MATCH_MATCH : MATCH_ACCEPT;
      RRETURN(rrc);
  
      /* Assertion brackets. Check the alternative branches in turn - the
      matching won't pass the KET for an assertion. If any one branch matches,
      the assertion is true. Lookbehind assertions have an OP_REVERSE item at the
      start of each branch to move the current point backwards, so the code at
      this level is identical to the lookahead case. When the assertion is part
      of a condition, we want to return immediately afterwards. The caller of
      this incarnation of the match() function will have set MATCH_CONDASSERT in
      md->match_function type, and one of these opcodes will be the first opcode
      that is processed. We use a local variable that is preserved over calls to
      match() to remember this case. */
  
      case OP_ASSERT:
      case OP_ASSERTBACK:
      save_mark = md->mark;
      if (md->match_function_type == MATCH_CONDASSERT)
        {
        condassert = TRUE;
        md->match_function_type = 0;
        }
      else condassert = FALSE;
  
      do
        {
        RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, NULL, RM4);
        if (rrc == MATCH_MATCH || rrc == MATCH_ACCEPT)
          {
          mstart = md->start_match_ptr;   /* In case \K reset it */
          break;
          }
        md->mark = save_mark;
  
        /* A COMMIT failure must fail the entire assertion, without trying any
        subsequent branches. */
  
        if (rrc == MATCH_COMMIT) RRETURN(MATCH_NOMATCH);
  
        /* PCRE does not allow THEN to escape beyond an assertion; it
        is treated as NOMATCH. */
  
        if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) RRETURN(rrc);
        ecode += GET(ecode, 1);
        }
      while (*ecode == OP_ALT);
  
      if (*ecode == OP_KET) RRETURN(MATCH_NOMATCH);
  
      /* If checking an assertion for a condition, return MATCH_MATCH. */
  
      if (condassert) RRETURN(MATCH_MATCH);
  
      /* Continue from after the assertion, updating the offsets high water
      mark, since extracts may have been taken during the assertion. */
  
      do ecode += GET(ecode,1); while (*ecode == OP_ALT);
      ecode += 1 + LINK_SIZE;
      offset_top = md->end_offset_top;
      continue;
  
      /* Negative assertion: all branches must fail to match. Encountering SKIP,
      PRUNE, or COMMIT means we must assume failure without checking subsequent
      branches. */
  
      case OP_ASSERT_NOT:
      case OP_ASSERTBACK_NOT:
      save_mark = md->mark;
      if (md->match_function_type == MATCH_CONDASSERT)
        {
        condassert = TRUE;
        md->match_function_type = 0;
        }
      else condassert = FALSE;
  
      do
        {
        RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, NULL, RM5);
        md->mark = save_mark;
        if (rrc == MATCH_MATCH || rrc == MATCH_ACCEPT) RRETURN(MATCH_NOMATCH);
        if (rrc == MATCH_SKIP || rrc == MATCH_PRUNE || rrc == MATCH_COMMIT)
          {
          do ecode += GET(ecode,1); while (*ecode == OP_ALT);
          break;
          }
  
        /* PCRE does not allow THEN to escape beyond an assertion; it is treated
        as NOMATCH. */
  
        if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) RRETURN(rrc);
        ecode += GET(ecode,1);
        }
      while (*ecode == OP_ALT);
  
      if (condassert) RRETURN(MATCH_MATCH);  /* Condition assertion */
  
      ecode += 1 + LINK_SIZE;
      continue;
  
      /* Move the subject pointer back. This occurs only at the start of
      each branch of a lookbehind assertion. If we are too close to the start to
      move back, this match function fails. When working with UTF-8 we move
      back a number of characters, not bytes. */
  
      case OP_REVERSE:
  #ifdef SUPPORT_UTF
      if (utf)
        {
        i = GET(ecode, 1);
        while (i-- > 0)
          {
          eptr--;
          if (eptr < md->start_subject) RRETURN(MATCH_NOMATCH);
          BACKCHAR(eptr);
          }
        }
      else
  #endif
  
      /* No UTF-8 support, or not in UTF-8 mode: count is byte count */
  
        {
        eptr -= GET(ecode, 1);
        if (eptr < md->start_subject) RRETURN(MATCH_NOMATCH);
        }
  
      /* Save the earliest consulted character, then skip to next op code */
  
      if (eptr < md->start_used_ptr) md->start_used_ptr = eptr;
      ecode += 1 + LINK_SIZE;
      break;
  
      /* The callout item calls an external function, if one is provided, passing
      details of the match so far. This is mainly for debugging, though the
      function is able to force a failure. */
  
      case OP_CALLOUT:
      if (PUBL(callout) != NULL)
        {
        PUBL(callout_block) cb;
        cb.version          = 2;   /* Version 1 of the callout block */
        cb.callout_number   = ecode[1];
        cb.offset_vector    = md->offset_vector;
  #ifdef COMPILE_PCRE8
        cb.subject          = (PCRE_SPTR)md->start_subject;
  #else
        cb.subject          = (PCRE_SPTR16)md->start_subject;
  #endif
        cb.subject_length   = (int)(md->end_subject - md->start_subject);
        cb.start_match      = (int)(mstart - md->start_subject);
        cb.current_position = (int)(eptr - md->start_subject);
        cb.pattern_position = GET(ecode, 2);
        cb.next_item_length = GET(ecode, 2 + LINK_SIZE);
        cb.capture_top      = offset_top/2;
        cb.capture_last     = md->capture_last;
        cb.callout_data     = md->callout_data;
        cb.mark             = md->nomatch_mark;
        if ((rrc = (*PUBL(callout))(&cb)) > 0) RRETURN(MATCH_NOMATCH);
        if (rrc < 0) RRETURN(rrc);
        }
      ecode += 2 + 2*LINK_SIZE;
      break;
  
      /* Recursion either matches the current regex, or some subexpression. The
      offset data is the offset to the starting bracket from the start of the
      whole pattern. (This is so that it works from duplicated subpatterns.)
  
      The state of the capturing groups is preserved over recursion, and
      re-instated afterwards. We don't know how many are started and not yet
      finished (offset_top records the completed total) so we just have to save
      all the potential data. There may be up to 65535 such values, which is too
      large to put on the stack, but using malloc for small numbers seems
      expensive. As a compromise, the stack is used when there are no more than
      REC_STACK_SAVE_MAX values to store; otherwise malloc is used.
  
      There are also other values that have to be saved. We use a chained
      sequence of blocks that actually live on the stack. Thanks to Robin Houston
      for the original version of this logic. It has, however, been hacked around
      a lot, so he is not to blame for the current way it works. */
  
      case OP_RECURSE:
        {
        recursion_info *ri;
        int recno;
  
        callpat = md->start_code + GET(ecode, 1);
        recno = (callpat == md->start_code)? 0 :
          GET2(callpat, 1 + LINK_SIZE);
  
        /* Check for repeating a recursion without advancing the subject pointer.
        This should catch convoluted mutual recursions. (Some simple cases are
        caught at compile time.) */
  
        for (ri = md->recursive; ri != NULL; ri = ri->prevrec)
          if (recno == ri->group_num && eptr == ri->subject_position)
            RRETURN(PCRE_ERROR_RECURSELOOP);
  
        /* Add to "recursing stack" */
  
        new_recursive.group_num = recno;
        new_recursive.subject_position = eptr;
        new_recursive.prevrec = md->recursive;
        md->recursive = &new_recursive;
  
        /* Where to continue from afterwards */
  
        ecode += 1 + LINK_SIZE;
  
        /* Now save the offset data */
  
        new_recursive.saved_max = md->offset_end;
        if (new_recursive.saved_max <= REC_STACK_SAVE_MAX)
          new_recursive.offset_save = stacksave;
        else
          {
          new_recursive.offset_save =
            (int *)(PUBL(malloc))(new_recursive.saved_max * sizeof(int));
          if (new_recursive.offset_save == NULL) RRETURN(PCRE_ERROR_NOMEMORY);
          }
        memcpy(new_recursive.offset_save, md->offset_vector,
              new_recursive.saved_max * sizeof(int));
  
        /* OK, now we can do the recursion. After processing each alternative,
        restore the offset data. If there were nested recursions, md->recursive
        might be changed, so reset it before looping. */
  
        DPRINTF(("Recursing into group %d\n", new_recursive.group_num));
        cbegroup = (*callpat >= OP_SBRA);
        do
          {
          if (cbegroup) md->match_function_type = MATCH_CBEGROUP;
          RMATCH(eptr, callpat + PRIV(OP_lengths)[*callpat], offset_top,
            md, eptrb, RM6);
          memcpy(md->offset_vector, new_recursive.offset_save,
              new_recursive.saved_max * sizeof(int));
          md->recursive = new_recursive.prevrec;
          if (rrc == MATCH_MATCH || rrc == MATCH_ACCEPT)
            {
            DPRINTF(("Recursion matched\n"));
            if (new_recursive.offset_save != stacksave)
              (PUBL(free))(new_recursive.offset_save);
  
            /* Set where we got to in the subject, and reset the start in case
            it was changed by \K. This *is* propagated back out of a recursion,
            for Perl compatibility. */
  
            eptr = md->end_match_ptr;
            mstart = md->start_match_ptr;
            goto RECURSION_MATCHED;        /* Exit loop; end processing */
            }
  
          /* PCRE does not allow THEN or COMMIT to escape beyond a recursion; it
          is treated as NOMATCH. */
  
          else if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN &&
                   rrc != MATCH_COMMIT)
            {
            DPRINTF(("Recursion gave error %d\n", rrc));
            if (new_recursive.offset_save != stacksave)
              (PUBL(free))(new_recursive.offset_save);
            RRETURN(rrc);
            }
  
          md->recursive = &new_recursive;
          callpat += GET(callpat, 1);
          }
        while (*callpat == OP_ALT);
  
        DPRINTF(("Recursion didn't match\n"));
        md->recursive = new_recursive.prevrec;
        if (new_recursive.offset_save != stacksave)
          (PUBL(free))(new_recursive.offset_save);
        RRETURN(MATCH_NOMATCH);
        }
  
      RECURSION_MATCHED:
      break;
  
      /* An alternation is the end of a branch; scan along to find the end of the
      bracketed group and go to there. */
  
      case OP_ALT:
      do ecode += GET(ecode,1); while (*ecode == OP_ALT);
      break;
  
      /* BRAZERO, BRAMINZERO and SKIPZERO occur just before a bracket group,
      indicating that it may occur zero times. It may repeat infinitely, or not
      at all - i.e. it could be ()* or ()? or even (){0} in the pattern. Brackets
      with fixed upper repeat limits are compiled as a number of copies, with the
      optional ones preceded by BRAZERO or BRAMINZERO. */
  
      case OP_BRAZERO:
      next = ecode + 1;
      RMATCH(eptr, next, offset_top, md, eptrb, RM10);
      if (rrc != MATCH_NOMATCH) RRETURN(rrc);
      do next += GET(next, 1); while (*next == OP_ALT);
      ecode = next + 1 + LINK_SIZE;
      break;
  
      case OP_BRAMINZERO:
      next = ecode + 1;
      do next += GET(next, 1); while (*next == OP_ALT);
      RMATCH(eptr, next + 1+LINK_SIZE, offset_top, md, eptrb, RM11);
      if (rrc != MATCH_NOMATCH) RRETURN(rrc);
      ecode++;
      break;
  
      case OP_SKIPZERO:
      next = ecode+1;
      do next += GET(next,1); while (*next == OP_ALT);
      ecode = next + 1 + LINK_SIZE;
      break;
  
      /* BRAPOSZERO occurs before a possessive bracket group. Don't do anything
      here; just jump to the group, with allow_zero set TRUE. */
  
      case OP_BRAPOSZERO:
      op = *(++ecode);
      allow_zero = TRUE;
      if (op == OP_CBRAPOS || op == OP_SCBRAPOS) goto POSSESSIVE_CAPTURE;
        goto POSSESSIVE_NON_CAPTURE;
  
      /* End of a group, repeated or non-repeating. */
  
      case OP_KET:
      case OP_KETRMIN:
      case OP_KETRMAX:
      case OP_KETRPOS:
      prev = ecode - GET(ecode, 1);
  
      /* 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. */
  
      if (*prev >= OP_SBRA || *prev == OP_ONCE)
        {
        saved_eptr = eptrb->epb_saved_eptr;   /* Value at start of group */
        eptrb = eptrb->epb_prev;              /* Backup to previous group */
        }
      else saved_eptr = NULL;
  
      /* If we are at the end of an assertion group or a non-capturing atomic
      group, stop matching and return MATCH_MATCH, but record the current high
      water mark for use by positive assertions. We also need to record the match
      start in case it was changed by \K. */
  
      if ((*prev >= OP_ASSERT && *prev <= OP_ASSERTBACK_NOT) ||
           *prev == OP_ONCE_NC)
        {
        md->end_match_ptr = eptr;      /* For ONCE_NC */
        md->end_offset_top = offset_top;
        md->start_match_ptr = mstart;
        RRETURN(MATCH_MATCH);         /* Sets md->mark */
        }
  
      /* For capturing groups we have to check the group number back at the start
      and if necessary complete handling an extraction by setting the offsets and
      bumping the high water mark. 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. We just have to record
      the current subject position and start match pointer and give a MATCH
      return. */
  
      if (*prev == OP_CBRA || *prev == OP_SCBRA ||
          *prev == OP_CBRAPOS || *prev == OP_SCBRAPOS)
        {
        number = GET2(prev, 1+LINK_SIZE);
        offset = number << 1;
  
  #ifdef PCRE_DEBUG
        printf("end bracket %d", number);
        printf("\n");
  #endif
  
        /* Handle a recursively called group. */
  
        if (md->recursive != NULL && md->recursive->group_num == number)
          {
          md->end_match_ptr = eptr;
          md->start_match_ptr = mstart;
          RRETURN(MATCH_MATCH);
          }
  
        /* Deal with capturing */
  
        md->capture_last = number;
        if (offset >= md->offset_max) md->offset_overflow = TRUE; else
          {
          /* If offset is greater than offset_top, it means that we are
          "skipping" a capturing group, and that group's offsets must be marked
          unset. In earlier versions of PCRE, all the offsets were unset at the
          start of matching, but this doesn't work because atomic groups and
          assertions can cause a value to be set that should later be unset.
          Example: matching /(?>(a))b|(a)c/ against "ac". This sets group 1 as
          part of the atomic group, but this is not on the final matching path,
          so must be unset when 2 is set. (If there is no group 2, there is no
          problem, because offset_top will then be 2, indicating no capture.) */
  
          if (offset > offset_top)
            {
            register int *iptr = md->offset_vector + offset_top;
            register int *iend = md->offset_vector + offset;
            while (iptr < iend) *iptr++ = -1;
            }
  
          /* Now make the extraction */
  
          md->offset_vector[offset] =
            md->offset_vector[md->offset_end - number];
          md->offset_vector[offset+1] = (int)(eptr - md->start_subject);
          if (offset_top <= offset) offset_top = offset + 2;
          }
        }
  
      /* For an ordinary non-repeating ket, just continue at this level. This
      also 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 5.005. For a non-repeating atomic group that includes captures,
      establish a backup point by processing the rest of the pattern at a lower
      level. If this results in a NOMATCH return, pass MATCH_ONCE back to the
      original OP_ONCE level, thereby bypassing intermediate backup points, but
      resetting any captures that happened along the way. */
  
      if (*ecode == OP_KET || eptr == saved_eptr)
        {
        if (*prev == OP_ONCE)
          {
          RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, eptrb, RM12);
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          md->once_target = prev;  /* Level at which to change to MATCH_NOMATCH */
          RRETURN(MATCH_ONCE);
          }
        ecode += 1 + LINK_SIZE;    /* Carry on at this level */
        break;
        }
  
      /* OP_KETRPOS is a possessive repeating ket. Remember the current position,
      and return the MATCH_KETRPOS. This makes it possible to do the repeats one
      at a time from the outer level, thus saving stack. */
  
      if (*ecode == OP_KETRPOS)
        {
        md->end_match_ptr = eptr;
        md->end_offset_top = offset_top;
        RRETURN(MATCH_KETRPOS);
        }
  
      /* The normal repeating kets try the rest of the pattern or restart from
      the 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
      an atomic group or an unlimited repeat of a group that can match an empty
      string. */
  
      if (*ecode == OP_KETRMIN)
        {
        RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, eptrb, RM7);
        if (rrc != MATCH_NOMATCH) RRETURN(rrc);
        if (*prev == OP_ONCE)
          {
          RMATCH(eptr, prev, offset_top, md, eptrb, RM8);
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          md->once_target = prev;  /* Level at which to change to MATCH_NOMATCH */
          RRETURN(MATCH_ONCE);
          }
        if (*prev >= OP_SBRA)    /* Could match an empty string */
          {
          RMATCH(eptr, prev, offset_top, md, eptrb, RM50);
          RRETURN(rrc);
          }
        ecode = prev;
        goto TAIL_RECURSE;
        }
      else  /* OP_KETRMAX */
        {
        RMATCH(eptr, prev, offset_top, md, eptrb, RM13);
        if (rrc == MATCH_ONCE && md->once_target == prev) rrc = MATCH_NOMATCH;
        if (rrc != MATCH_NOMATCH) RRETURN(rrc);
        if (*prev == OP_ONCE)
          {
          RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, eptrb, RM9);
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          md->once_target = prev;
          RRETURN(MATCH_ONCE);
          }
        ecode += 1 + LINK_SIZE;
        goto TAIL_RECURSE;
        }
      /* Control never gets here */
  
      /* Not multiline mode: start of subject assertion, unless notbol. */
  
      case OP_CIRC:
      if (md->notbol && eptr == md->start_subject) RRETURN(MATCH_NOMATCH);
  
      /* Start of subject assertion */
  
      case OP_SOD:
      if (eptr != md->start_subject) RRETURN(MATCH_NOMATCH);
      ecode++;
      break;
  
      /* Multiline mode: start of subject unless notbol, or after any newline. */
  
      case OP_CIRCM:
      if (md->notbol && eptr == md->start_subject) RRETURN(MATCH_NOMATCH);
      if (eptr != md->start_subject &&
          (eptr == md->end_subject || !WAS_NEWLINE(eptr)))
        RRETURN(MATCH_NOMATCH);
      ecode++;
      break;
  
      /* Start of match assertion */
  
      case OP_SOM:
      if (eptr != md->start_subject + md->start_offset) RRETURN(MATCH_NOMATCH);
      ecode++;
      break;
  
      /* Reset the start of match point */
  
      case OP_SET_SOM:
      mstart = eptr;
      ecode++;
      break;
  
      /* Multiline mode: assert before any newline, or before end of subject
      unless noteol is set. */
  
      case OP_DOLLM:
      if (eptr < md->end_subject)
        {
        if (!IS_NEWLINE(eptr))
          {
          if (md->partial != 0 &&
              eptr + 1 >= md->end_subject &&
              NLBLOCK->nltype == NLTYPE_FIXED &&
              NLBLOCK->nllen == 2 &&
              *eptr == NLBLOCK->nl[0])
            {
            md->hitend = TRUE;
            if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL);
            }
          RRETURN(MATCH_NOMATCH);
          }
        }
      else
        {
        if (md->noteol) RRETURN(MATCH_NOMATCH);
        SCHECK_PARTIAL();
        }
      ecode++;
      break;
  
      /* Not multiline mode: assert before a terminating newline or before end of
      subject unless noteol is set. */
  
      case OP_DOLL:
      if (md->noteol) RRETURN(MATCH_NOMATCH);
      if (!md->endonly) goto ASSERT_NL_OR_EOS;
  
      /* ... else fall through for endonly */
  
      /* End of subject assertion (\z) */
  
      case OP_EOD:
      if (eptr < md->end_subject) RRETURN(MATCH_NOMATCH);
      SCHECK_PARTIAL();
      ecode++;
      break;
  
      /* End of subject or ending \n assertion (\Z) */
  
      case OP_EODN:
      ASSERT_NL_OR_EOS:
      if (eptr < md->end_subject &&
          (!IS_NEWLINE(eptr) || eptr != md->end_subject - md->nllen))
        {
        if (md->partial != 0 &&
            eptr + 1 >= md->end_subject &&
            NLBLOCK->nltype == NLTYPE_FIXED &&
            NLBLOCK->nllen == 2 &&
            *eptr == NLBLOCK->nl[0])
          {
          md->hitend = TRUE;
          if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL);
          }
        RRETURN(MATCH_NOMATCH);
        }
  
      /* Either at end of string or \n before end. */
  
      SCHECK_PARTIAL();
      ecode++;
      break;
  
      /* Word boundary assertions */
  
      case OP_NOT_WORD_BOUNDARY:
      case OP_WORD_BOUNDARY:
        {
  
        /* Find out if the previous and current characters are "word" characters.
        It takes a bit more work in UTF-8 mode. Characters > 255 are assumed to
        be "non-word" characters. Remember the earliest consulted character for
        partial matching. */
  
  #ifdef SUPPORT_UTF
        if (utf)
          {
          /* Get status of previous character */
  
          if (eptr == md->start_subject) prev_is_word = FALSE; else
            {
            PCRE_PUCHAR lastptr = eptr - 1;
            BACKCHAR(lastptr);
            if (lastptr < md->start_used_ptr) md->start_used_ptr = lastptr;
            GETCHAR(c, lastptr);
  #ifdef SUPPORT_UCP
            if (md->use_ucp)
              {
              if (c == '_') prev_is_word = TRUE; else
                {
                int cat = UCD_CATEGORY(c);
                prev_is_word = (cat == ucp_L || cat == ucp_N);
                }
              }
            else
  #endif
            prev_is_word = c < 256 && (md->ctypes[c] & ctype_word) != 0;
            }
  
          /* Get status of next character */
  
          if (eptr >= md->end_subject)
            {
            SCHECK_PARTIAL();
            cur_is_word = FALSE;
            }
          else
            {
            GETCHAR(c, eptr);
  #ifdef SUPPORT_UCP
            if (md->use_ucp)
              {
              if (c == '_') cur_is_word = TRUE; else
                {
                int cat = UCD_CATEGORY(c);
                cur_is_word = (cat == ucp_L || cat == ucp_N);
                }
              }
            else
  #endif
            cur_is_word = c < 256 && (md->ctypes[c] & ctype_word) != 0;
            }
          }
        else
  #endif
  
        /* Not in UTF-8 mode, but we may still have PCRE_UCP set, and for
        consistency with the behaviour of \w we do use it in this case. */
  
          {
          /* Get status of previous character */
  
          if (eptr == md->start_subject) prev_is_word = FALSE; else
            {
            if (eptr <= md->start_used_ptr) md->start_used_ptr = eptr - 1;
  #ifdef SUPPORT_UCP
            if (md->use_ucp)
              {
              c = eptr[-1];
              if (c == '_') prev_is_word = TRUE; else
                {
                int cat = UCD_CATEGORY(c);
                prev_is_word = (cat == ucp_L || cat == ucp_N);
                }
              }
            else
  #endif
            prev_is_word = MAX_255(eptr[-1])
              && ((md->ctypes[eptr[-1]] & ctype_word) != 0);
            }
  
          /* Get status of next character */
  
          if (eptr >= md->end_subject)
            {
            SCHECK_PARTIAL();
            cur_is_word = FALSE;
            }
          else
  #ifdef SUPPORT_UCP
          if (md->use_ucp)
            {
            c = *eptr;
            if (c == '_') cur_is_word = TRUE; else
              {
              int cat = UCD_CATEGORY(c);
              cur_is_word = (cat == ucp_L || cat == ucp_N);
              }
            }
          else
  #endif
          cur_is_word = MAX_255(*eptr)
            && ((md->ctypes[*eptr] & ctype_word) != 0);
          }
  
        /* Now see if the situation is what we want */
  
        if ((*ecode++ == OP_WORD_BOUNDARY)?
             cur_is_word == prev_is_word : cur_is_word != prev_is_word)
          RRETURN(MATCH_NOMATCH);
        }
      break;
  
      /* Match any single character type except newline; have to take care with
      CRLF newlines and partial matching. */
  
      case OP_ANY:
      if (IS_NEWLINE(eptr)) RRETURN(MATCH_NOMATCH);
      if (md->partial != 0 &&
          eptr + 1 >= md->end_subject &&
          NLBLOCK->nltype == NLTYPE_FIXED &&
          NLBLOCK->nllen == 2 &&
          *eptr == NLBLOCK->nl[0])
        {
        md->hitend = TRUE;
        if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL);
        }
  
      /* Fall through */
  
      /* Match any single character whatsoever. */
  
      case OP_ALLANY:
      if (eptr >= md->end_subject)   /* DO NOT merge the eptr++ here; it must */
        {                            /* not be updated before SCHECK_PARTIAL. */
        SCHECK_PARTIAL();
        RRETURN(MATCH_NOMATCH);
        }
      eptr++;
  #ifdef SUPPORT_UTF
      if (utf) ACROSSCHAR(eptr < md->end_subject, *eptr, eptr++);
  #endif
      ecode++;
      break;
  
      /* Match a single byte, even in UTF-8 mode. This opcode really does match
      any byte, even newline, independent of the setting of PCRE_DOTALL. */
  
      case OP_ANYBYTE:
      if (eptr >= md->end_subject)   /* DO NOT merge the eptr++ here; it must */
        {                            /* not be updated before SCHECK_PARTIAL. */
        SCHECK_PARTIAL();
        RRETURN(MATCH_NOMATCH);
        }
      eptr++;
      ecode++;
      break;
  
      case OP_NOT_DIGIT:
      if (eptr >= md->end_subject)
        {
        SCHECK_PARTIAL();
        RRETURN(MATCH_NOMATCH);
        }
      GETCHARINCTEST(c, eptr);
      if (
  #if defined SUPPORT_UTF || !(defined COMPILE_PCRE8)
         c < 256 &&
  #endif
         (md->ctypes[c] & ctype_digit) != 0
         )
        RRETURN(MATCH_NOMATCH);
      ecode++;
      break;
  
      case OP_DIGIT:
      if (eptr >= md->end_subject)
        {
        SCHECK_PARTIAL();
        RRETURN(MATCH_NOMATCH);
        }
      GETCHARINCTEST(c, eptr);
      if (
  #if defined SUPPORT_UTF || !(defined COMPILE_PCRE8)
         c > 255 ||
  #endif
         (md->ctypes[c] & ctype_digit) == 0
         )
        RRETURN(MATCH_NOMATCH);
      ecode++;
      break;
  
      case OP_NOT_WHITESPACE:
      if (eptr >= md->end_subject)
        {
        SCHECK_PARTIAL();
        RRETURN(MATCH_NOMATCH);
        }
      GETCHARINCTEST(c, eptr);
      if (
  #if defined SUPPORT_UTF || !(defined COMPILE_PCRE8)
         c < 256 &&
  #endif
         (md->ctypes[c] & ctype_space) != 0
         )
        RRETURN(MATCH_NOMATCH);
      ecode++;
      break;
  
      case OP_WHITESPACE:
      if (eptr >= md->end_subject)
        {
        SCHECK_PARTIAL();
        RRETURN(MATCH_NOMATCH);
        }
      GETCHARINCTEST(c, eptr);
      if (
  #if defined SUPPORT_UTF || !(defined COMPILE_PCRE8)
         c > 255 ||
  #endif
         (md->ctypes[c] & ctype_space) == 0
         )
        RRETURN(MATCH_NOMATCH);
      ecode++;
      break;
  
      case OP_NOT_WORDCHAR:
      if (eptr >= md->end_subject)
        {
        SCHECK_PARTIAL();
        RRETURN(MATCH_NOMATCH);
        }
      GETCHARINCTEST(c, eptr);
      if (
  #if defined SUPPORT_UTF || !(defined COMPILE_PCRE8)
         c < 256 &&
  #endif
         (md->ctypes[c] & ctype_word) != 0
         )
        RRETURN(MATCH_NOMATCH);
      ecode++;
      break;
  
      case OP_WORDCHAR:
      if (eptr >= md->end_subject)
        {
        SCHECK_PARTIAL();
        RRETURN(MATCH_NOMATCH);
        }
      GETCHARINCTEST(c, eptr);
      if (
  #if defined SUPPORT_UTF || !(defined COMPILE_PCRE8)
         c > 255 ||
  #endif
         (md->ctypes[c] & ctype_word) == 0
         )
        RRETURN(MATCH_NOMATCH);
      ecode++;
      break;
  
      case OP_ANYNL:
      if (eptr >= md->end_subject)
        {
        SCHECK_PARTIAL();
        RRETURN(MATCH_NOMATCH);
        }
      GETCHARINCTEST(c, eptr);
      switch(c)
        {
        default: RRETURN(MATCH_NOMATCH);
  
        case 0x000d:
        if (eptr >= md->end_subject)
          {
          SCHECK_PARTIAL();
          }
        else if (*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)
        {
        SCHECK_PARTIAL();
        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)
        {
        SCHECK_PARTIAL();
        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)
        {
        SCHECK_PARTIAL();
        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)
        {
        SCHECK_PARTIAL();
        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. */
  
      case OP_PROP:
      case OP_NOTPROP:
      if (eptr >= md->end_subject)
        {
        SCHECK_PARTIAL();
        RRETURN(MATCH_NOMATCH);
        }
      GETCHARINCTEST(c, eptr);
        {
        const ucd_record *prop = GET_UCD(c);
  
        switch(ecode[1])
          {
          case PT_ANY:
          if (op == OP_NOTPROP) RRETURN(MATCH_NOMATCH);
          break;
  
          case PT_LAMP:
          if ((prop->chartype == ucp_Lu ||
               prop->chartype == ucp_Ll ||
               prop->chartype == ucp_Lt) == (op == OP_NOTPROP))
            RRETURN(MATCH_NOMATCH);
          break;
  
          case PT_GC:
          if ((ecode[2] != PRIV(ucp_gentype)[prop->chartype]) == (op == OP_PROP))
            RRETURN(MATCH_NOMATCH);
          break;
  
          case PT_PC:
          if ((ecode[2] != prop->chartype) == (op == OP_PROP))
            RRETURN(MATCH_NOMATCH);
          break;
  
          case PT_SC:
          if ((ecode[2] != prop->script) == (op == OP_PROP))
            RRETURN(MATCH_NOMATCH);
          break;
  
          /* These are specials */
  
          case PT_ALNUM:
          if ((PRIV(ucp_gentype)[prop->chartype] == ucp_L ||
               PRIV(ucp_gentype)[prop->chartype] == ucp_N) == (op == OP_NOTPROP))
            RRETURN(MATCH_NOMATCH);
          break;
  
          case PT_SPACE:    /* Perl space */
          if ((PRIV(ucp_gentype)[prop->chartype] == ucp_Z ||
               c == CHAR_HT || c == CHAR_NL || c == CHAR_FF || c == CHAR_CR)
                 == (op == OP_NOTPROP))
            RRETURN(MATCH_NOMATCH);
          break;
  
          case PT_PXSPACE:  /* POSIX space */
          if ((PRIV(ucp_gentype)[prop->chartype] == ucp_Z ||
               c == CHAR_HT || c == CHAR_NL || c == CHAR_VT ||
               c == CHAR_FF || c == CHAR_CR)
                 == (op == OP_NOTPROP))
            RRETURN(MATCH_NOMATCH);
          break;
  
          case PT_WORD:
          if ((PRIV(ucp_gentype)[prop->chartype] == ucp_L ||
               PRIV(ucp_gentype)[prop->chartype] == ucp_N ||
               c == CHAR_UNDERSCORE) == (op == OP_NOTPROP))
            RRETURN(MATCH_NOMATCH);
          break;
  
          /* This should never occur */
  
          default:
          RRETURN(PCRE_ERROR_INTERNAL);
          }
  
        ecode += 3;
        }
      break;
  
      /* Match an extended Unicode sequence. We will get here only if the support
      is in the binary; otherwise a compile-time error occurs. */
  
      case OP_EXTUNI:
      if (eptr >= md->end_subject)
        {
        SCHECK_PARTIAL();
        RRETURN(MATCH_NOMATCH);
        }
      GETCHARINCTEST(c, eptr);
      if (UCD_CATEGORY(c) == ucp_M) RRETURN(MATCH_NOMATCH);
      while (eptr < md->end_subject)
        {
        int len = 1;
        if (!utf) c = *eptr; else { GETCHARLEN(c, eptr, len); }
        if (UCD_CATEGORY(c) != ucp_M) break;
        eptr += len;
        }
      CHECK_PARTIAL();
      ecode++;
      break;
  #endif
  
  
      /* Match a back reference, possibly repeatedly. Look past the end of the
      item to see if there is repeat information following. The code is similar
      to that for character classes, but repeated for efficiency. Then obey
      similar code to character type repeats - written out again for speed.
      However, if the referenced string is the empty string, always treat
      it as matched, any number of times (otherwise there could be infinite
      loops). */
  
      case OP_REF:
      case OP_REFI:
      caseless = op == OP_REFI;
      offset = GET2(ecode, 1) << 1;               /* Doubled ref number */
      ecode += 1 + IMM2_SIZE;
  
      /* If the reference is unset, there are two possibilities:
  
      (a) In the default, Perl-compatible state, set the length negative;
      this ensures that every attempt at a match fails. We can't just fail
      here, because of the possibility of quantifiers with zero minima.
  
      (b) If the JavaScript compatibility flag is set, set the length to zero
      so that the back reference matches an empty string.
  
      Otherwise, set the length to the length of what was matched by the
      referenced subpattern. */
  
      if (offset >= offset_top || md->offset_vector[offset] < 0)
        length = (md->jscript_compat)? 0 : -1;
      else
        length = md->offset_vector[offset+1] - md->offset_vector[offset];
  
      /* Set up for repetition, or handle the non-repeated case */
  
      switch (*ecode)
        {
        case OP_CRSTAR:
        case OP_CRMINSTAR:
        case OP_CRPLUS:
        case OP_CRMINPLUS:
        case OP_CRQUERY:
        case OP_CRMINQUERY:
        c = *ecode++ - OP_CRSTAR;
        minimize = (c & 1) != 0;
        min = rep_min[c];                 /* Pick up values from tables; */
        max = rep_max[c];                 /* zero for max => infinity */
        if (max == 0) max = INT_MAX;
        break;
  
        case OP_CRRANGE:
        case OP_CRMINRANGE:
        minimize = (*ecode == OP_CRMINRANGE);
        min = GET2(ecode, 1);
        max = GET2(ecode, 1 + IMM2_SIZE);
        if (max == 0) max = INT_MAX;
        ecode += 1 + 2 * IMM2_SIZE;
        break;
  
        default:               /* No repeat follows */
        if ((length = match_ref(offset, eptr, length, md, caseless)) < 0)
          {
          if (length == -2) eptr = md->end_subject;   /* Partial match */
          CHECK_PARTIAL();
          RRETURN(MATCH_NOMATCH);
          }
        eptr += length;
        continue;              /* With the main loop */
        }
  
      /* Handle repeated back references. If the length of the reference is
      zero, just continue with the main loop. If the length is negative, it
      means the reference is unset in non-Java-compatible mode. If the minimum is
      zero, we can continue at the same level without recursion. For any other
      minimum, carrying on will result in NOMATCH. */
  
      if (length == 0) continue;
      if (length < 0 && min == 0) continue;
  
      /* First, ensure the minimum number of matches are present. We get back
      the length of the reference string explicitly rather than passing the
      address of eptr, so that eptr can be a register variable. */
  
      for (i = 1; i <= min; i++)
        {
        int slength;
        if ((slength = match_ref(offset, eptr, length, md, caseless)) < 0)
          {
          if (slength == -2) eptr = md->end_subject;   /* Partial match */
          CHECK_PARTIAL();
          RRETURN(MATCH_NOMATCH);
          }
        eptr += slength;
        }
  
      /* If min = max, continue at the same level without recursion.
      They are not both allowed to be zero. */
  
      if (min == max) continue;
  
      /* If minimizing, keep trying and advancing the pointer */
  
      if (minimize)
        {
        for (fi = min;; fi++)
          {
          int slength;
          RMATCH(eptr, ecode, offset_top, md, eptrb, RM14);
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          if (fi >= max) RRETURN(MATCH_NOMATCH);
          if ((slength = match_ref(offset, eptr, length, md, caseless)) < 0)
            {
            if (slength == -2) eptr = md->end_subject;   /* Partial match */
            CHECK_PARTIAL();
            RRETURN(MATCH_NOMATCH);
            }
          eptr += slength;
          }
        /* Control never gets here */
        }
  
      /* If maximizing, find the longest string and work backwards */
  
      else
        {
        pp = eptr;
        for (i = min; i < max; i++)
          {
          int slength;
          if ((slength = match_ref(offset, eptr, length, md, caseless)) < 0)
            {
            /* Can't use CHECK_PARTIAL because we don't want to update eptr in
            the soft partial matching case. */
  
            if (slength == -2 && md->partial != 0 &&
                md->end_subject > md->start_used_ptr)
              {
              md->hitend = TRUE;
              if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL);
              }
            break;
            }
          eptr += slength;
          }
  
        while (eptr >= pp)
          {
          RMATCH(eptr, ecode, offset_top, md, eptrb, RM15);
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          eptr -= length;
          }
        RRETURN(MATCH_NOMATCH);
        }
      /* Control never gets here */
  
      /* Match a bit-mapped character class, possibly repeatedly. This op code is
      used when all the characters in the class have values in the range 0-255,
      and either the matching is caseful, or the characters are in the range
      0-127 when UTF-8 processing is enabled. The only difference between
      OP_CLASS and OP_NCLASS occurs when a data character outside the range is
      encountered.
  
      First, look past the end of the item to see if there is repeat information
      following. Then obey similar code to character type repeats - written out
      again for speed. */
  
      case OP_NCLASS:
      case OP_CLASS:
        {
        /* The data variable is saved across frames, so the byte map needs to
        be stored there. */
  #define BYTE_MAP ((pcre_uint8 *)data)
        data = ecode + 1;                /* Save for matching */
        ecode += 1 + (32 / sizeof(pcre_uchar)); /* Advance past the item */
  
        switch (*ecode)
          {
          case OP_CRSTAR:
          case OP_CRMINSTAR:
          case OP_CRPLUS:
          case OP_CRMINPLUS:
          case OP_CRQUERY:
          case OP_CRMINQUERY:
          c = *ecode++ - OP_CRSTAR;
          minimize = (c & 1) != 0;
          min = rep_min[c];                 /* Pick up values from tables; */
          max = rep_max[c];                 /* zero for max => infinity */
          if (max == 0) max = INT_MAX;
          break;
  
          case OP_CRRANGE:
          case OP_CRMINRANGE:
          minimize = (*ecode == OP_CRMINRANGE);
          min = GET2(ecode, 1);
          max = GET2(ecode, 1 + IMM2_SIZE);
          if (max == 0) max = INT_MAX;
          ecode += 1 + 2 * IMM2_SIZE;
          break;
  
          default:               /* No repeat follows */
          min = max = 1;
          break;
          }
  
        /* First, ensure the minimum number of matches are present. */
  
  #ifdef SUPPORT_UTF
        if (utf)
          {
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            GETCHARINC(c, eptr);
            if (c > 255)
              {
              if (op == OP_CLASS) RRETURN(MATCH_NOMATCH);
              }
            else
              if ((BYTE_MAP[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH);
            }
          }
        else
  #endif
        /* Not UTF mode */
          {
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            c = *eptr++;
  #ifndef COMPILE_PCRE8
            if (c > 255)
              {
              if (op == OP_CLASS) RRETURN(MATCH_NOMATCH);
              }
            else
  #endif
              if ((BYTE_MAP[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH);
            }
          }
  
        /* If max == min we can continue with the main loop without the
        need to recurse. */
  
        if (min == max) continue;
  
        /* If minimizing, keep testing the rest of the expression and advancing
        the pointer while it matches the class. */
  
        if (minimize)
          {
  #ifdef SUPPORT_UTF
          if (utf)
            {
            for (fi = min;; fi++)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM16);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max) RRETURN(MATCH_NOMATCH);
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINC(c, eptr);
              if (c > 255)
                {
                if (op == OP_CLASS) RRETURN(MATCH_NOMATCH);
                }
              else
                if ((BYTE_MAP[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH);
              }
            }
          else
  #endif
          /* Not UTF mode */
            {
            for (fi = min;; fi++)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM17);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max) RRETURN(MATCH_NOMATCH);
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              c = *eptr++;
  #ifndef COMPILE_PCRE8
              if (c > 255)
                {
                if (op == OP_CLASS) RRETURN(MATCH_NOMATCH);
                }
              else
  #endif
                if ((BYTE_MAP[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH);
              }
            }
          /* Control never gets here */
          }
  
        /* If maximizing, find the longest possible run, then work backwards. */
  
        else
          {
          pp = eptr;
  
  #ifdef SUPPORT_UTF
          if (utf)
            {
            for (i = min; i < max; i++)
              {
              int len = 1;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              GETCHARLEN(c, eptr, len);
              if (c > 255)
                {
                if (op == OP_CLASS) break;
                }
              else
                if ((BYTE_MAP[c/8] & (1 << (c&7))) == 0) break;
              eptr += len;
              }
            for (;;)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM18);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (eptr-- == pp) break;        /* Stop if tried at original pos */
              BACKCHAR(eptr);
              }
            }
          else
  #endif
            /* Not UTF mode */
            {
            for (i = min; i < max; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              c = *eptr;
  #ifndef COMPILE_PCRE8
              if (c > 255)
                {
                if (op == OP_CLASS) break;
                }
              else
  #endif
                if ((BYTE_MAP[c/8] & (1 << (c&7))) == 0) break;
              eptr++;
              }
            while (eptr >= pp)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM19);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              eptr--;
              }
            }
  
          RRETURN(MATCH_NOMATCH);
          }
  #undef BYTE_MAP
        }
      /* Control never gets here */
  
  
      /* Match an extended character class. This opcode is encountered only
      when UTF-8 mode mode is supported. Nevertheless, we may not be in UTF-8
      mode, because Unicode properties are supported in non-UTF-8 mode. */
  
  #if defined SUPPORT_UTF || !defined COMPILE_PCRE8
      case OP_XCLASS:
        {
        data = ecode + 1 + LINK_SIZE;                /* Save for matching */
        ecode += GET(ecode, 1);                      /* Advance past the item */
  
        switch (*ecode)
          {
          case OP_CRSTAR:
          case OP_CRMINSTAR:
          case OP_CRPLUS:
          case OP_CRMINPLUS:
          case OP_CRQUERY:
          case OP_CRMINQUERY:
          c = *ecode++ - OP_CRSTAR;
          minimize = (c & 1) != 0;
          min = rep_min[c];                 /* Pick up values from tables; */
          max = rep_max[c];                 /* zero for max => infinity */
          if (max == 0) max = INT_MAX;
          break;
  
          case OP_CRRANGE:
          case OP_CRMINRANGE:
          minimize = (*ecode == OP_CRMINRANGE);
          min = GET2(ecode, 1);
          max = GET2(ecode, 1 + IMM2_SIZE);
          if (max == 0) max = INT_MAX;
          ecode += 1 + 2 * IMM2_SIZE;
          break;
  
          default:               /* No repeat follows */
          min = max = 1;
          break;
          }
  
        /* First, ensure the minimum number of matches are present. */
  
        for (i = 1; i <= min; i++)
          {
          if (eptr >= md->end_subject)
            {
            SCHECK_PARTIAL();
            RRETURN(MATCH_NOMATCH);
            }
          GETCHARINCTEST(c, eptr);
          if (!PRIV(xclass)(c, data, utf)) RRETURN(MATCH_NOMATCH);
          }
  
        /* If max == min we can continue with the main loop without the
        need to recurse. */
  
        if (min == max) continue;
  
        /* If minimizing, keep testing the rest of the expression and advancing
        the pointer while it matches the class. */
  
        if (minimize)
          {
          for (fi = min;; fi++)
            {
            RMATCH(eptr, ecode, offset_top, md, eptrb, RM20);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max) RRETURN(MATCH_NOMATCH);
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            GETCHARINCTEST(c, eptr);
            if (!PRIV(xclass)(c, data, utf)) RRETURN(MATCH_NOMATCH);
            }
          /* Control never gets here */
          }
  
        /* If maximizing, find the longest possible run, then work backwards. */
  
        else
          {
          pp = eptr;
          for (i = min; i < max; i++)
            {
            int len = 1;
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              break;
              }
  #ifdef SUPPORT_UTF
            GETCHARLENTEST(c, eptr, len);
  #else
            c = *eptr;
  #endif
            if (!PRIV(xclass)(c, data, utf)) break;
            eptr += len;
            }
          for(;;)
            {
            RMATCH(eptr, ecode, offset_top, md, eptrb, RM21);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (eptr-- == pp) break;        /* Stop if tried at original pos */
  #ifdef SUPPORT_UTF
            if (utf) BACKCHAR(eptr);
  #endif
            }
          RRETURN(MATCH_NOMATCH);
          }
  
        /* Control never gets here */
        }
  #endif    /* End of XCLASS */
  
      /* Match a single character, casefully */
  
      case OP_CHAR:
  #ifdef SUPPORT_UTF
      if (utf)
        {
        length = 1;
        ecode++;
        GETCHARLEN(fc, ecode, length);
        if (length > md->end_subject - eptr)
          {
          CHECK_PARTIAL();             /* Not SCHECK_PARTIAL() */
          RRETURN(MATCH_NOMATCH);
          }
        while (length-- > 0) if (*ecode++ != *eptr++) RRETURN(MATCH_NOMATCH);
        }
      else
  #endif
      /* Not UTF mode */
        {
        if (md->end_subject - eptr < 1)
          {
          SCHECK_PARTIAL();            /* This one can use SCHECK_PARTIAL() */
          RRETURN(MATCH_NOMATCH);
          }
        if (ecode[1] != *eptr++) RRETURN(MATCH_NOMATCH);
        ecode += 2;
        }
      break;
  
      /* Match a single character, caselessly. If we are at the end of the
      subject, give up immediately. */
  
      case OP_CHARI:
      if (eptr >= md->end_subject)
        {
        SCHECK_PARTIAL();
        RRETURN(MATCH_NOMATCH);
        }
  
  #ifdef SUPPORT_UTF
      if (utf)
        {
        length = 1;
        ecode++;
        GETCHARLEN(fc, ecode, length);
  
        /* If the pattern character's value is < 128, we have only one byte, and
        we know that its other case must also be one byte long, so we can use the
        fast lookup table. We know that there is at least one byte left in the
        subject. */
  
        if (fc < 128)
          {
          if (md->lcc[fc]
              != TABLE_GET(*eptr, md->lcc, *eptr)) RRETURN(MATCH_NOMATCH);
          ecode++;
          eptr++;
          }
  
        /* Otherwise we must pick up the subject character. Note that we cannot
        use the value of "length" to check for sufficient bytes left, because the
        other case of the character may have more or fewer bytes.  */
  
        else
          {
          unsigned int dc;
          GETCHARINC(dc, eptr);
          ecode += length;
  
          /* If we have Unicode property support, we can use it to test the other
          case of the character, if there is one. */
  
          if (fc != dc)
            {
  #ifdef SUPPORT_UCP
            if (dc != UCD_OTHERCASE(fc))
  #endif
              RRETURN(MATCH_NOMATCH);
            }
          }
        }
      else
  #endif   /* SUPPORT_UTF */
  
      /* Not UTF mode */
        {
        if (TABLE_GET(ecode[1], md->lcc, ecode[1])
            != TABLE_GET(*eptr, md->lcc, *eptr)) RRETURN(MATCH_NOMATCH);
        eptr++;
        ecode += 2;
        }
      break;
  
      /* Match a single character repeatedly. */
  
      case OP_EXACT:
      case OP_EXACTI:
      min = max = GET2(ecode, 1);
      ecode += 1 + IMM2_SIZE;
      goto REPEATCHAR;
  
      case OP_POSUPTO:
      case OP_POSUPTOI:
      possessive = TRUE;
      /* Fall through */
  
      case OP_UPTO:
      case OP_UPTOI:
      case OP_MINUPTO:
      case OP_MINUPTOI:
      min = 0;
      max = GET2(ecode, 1);
      minimize = *ecode == OP_MINUPTO || *ecode == OP_MINUPTOI;
      ecode += 1 + IMM2_SIZE;
      goto REPEATCHAR;
  
      case OP_POSSTAR:
      case OP_POSSTARI:
      possessive = TRUE;
      min = 0;
      max = INT_MAX;
      ecode++;
      goto REPEATCHAR;
  
      case OP_POSPLUS:
      case OP_POSPLUSI:
      possessive = TRUE;
      min = 1;
      max = INT_MAX;
      ecode++;
      goto REPEATCHAR;
  
      case OP_POSQUERY:
      case OP_POSQUERYI:
      possessive = TRUE;
      min = 0;
      max = 1;
      ecode++;
      goto REPEATCHAR;
  
      case OP_STAR:
      case OP_STARI:
      case OP_MINSTAR:
      case OP_MINSTARI:
      case OP_PLUS:
      case OP_PLUSI:
      case OP_MINPLUS:
      case OP_MINPLUSI:
      case OP_QUERY:
      case OP_QUERYI:
      case OP_MINQUERY:
      case OP_MINQUERYI:
      c = *ecode++ - ((op < OP_STARI)? OP_STAR : OP_STARI);
      minimize = (c & 1) != 0;
      min = rep_min[c];                 /* Pick up values from tables; */
      max = rep_max[c];                 /* zero for max => infinity */
      if (max == 0) max = INT_MAX;
  
      /* Common code for all repeated single-character matches. */
  
      REPEATCHAR:
  #ifdef SUPPORT_UTF
      if (utf)
        {
        length = 1;
        charptr = ecode;
        GETCHARLEN(fc, ecode, length);
        ecode += length;
  
        /* Handle multibyte character matching specially here. There is
        support for caseless matching if UCP support is present. */
  
        if (length > 1)
          {
  #ifdef SUPPORT_UCP
          unsigned int othercase;
          if (op >= OP_STARI &&     /* Caseless */
              (othercase = UCD_OTHERCASE(fc)) != fc)
            oclength = PRIV(ord2utf)(othercase, occhars);
          else oclength = 0;
  #endif  /* SUPPORT_UCP */
  
          for (i = 1; i <= min; i++)
            {
            if (eptr <= md->end_subject - length &&
              memcmp(eptr, charptr, IN_UCHARS(length)) == 0) eptr += length;
  #ifdef SUPPORT_UCP
            else if (oclength > 0 &&
                     eptr <= md->end_subject - oclength &&
                     memcmp(eptr, occhars, IN_UCHARS(oclength)) == 0) eptr += oclength;
  #endif  /* SUPPORT_UCP */
            else
              {
              CHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            }
  
          if (min == max) continue;
  
          if (minimize)
            {
            for (fi = min;; fi++)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM22);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max) RRETURN(MATCH_NOMATCH);
              if (eptr <= md->end_subject - length &&
                memcmp(eptr, charptr, IN_UCHARS(length)) == 0) eptr += length;
  #ifdef SUPPORT_UCP
              else if (oclength > 0 &&
                       eptr <= md->end_subject - oclength &&
                       memcmp(eptr, occhars, IN_UCHARS(oclength)) == 0) eptr += oclength;
  #endif  /* SUPPORT_UCP */
              else
                {
                CHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              }
            /* Control never gets here */
            }
  
          else  /* Maximize */
            {
            pp = eptr;
            for (i = min; i < max; i++)
              {
              if (eptr <= md->end_subject - length &&
                  memcmp(eptr, charptr, IN_UCHARS(length)) == 0) eptr += length;
  #ifdef SUPPORT_UCP
              else if (oclength > 0 &&
                       eptr <= md->end_subject - oclength &&
                       memcmp(eptr, occhars, IN_UCHARS(oclength)) == 0) eptr += oclength;
  #endif  /* SUPPORT_UCP */
              else
                {
                CHECK_PARTIAL();
                break;
                }
              }
  
            if (possessive) continue;
  
            for(;;)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, 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 */
              }
            }
          /* Control never gets here */
          }
  
        /* If the length of a UTF-8 character is 1, we fall through here, and
        obey the code as for non-UTF-8 characters below, though in this case the
        value of fc will always be < 128. */
        }
      else
  #endif  /* SUPPORT_UTF */
        /* When not in UTF-8 mode, load a single-byte character. */
        fc = *ecode++;
  
      /* The value of fc at this point is always one character, though we may
      or may not be in UTF mode. The code is duplicated for the caseless and
      caseful cases, for speed, since matching characters is likely to be quite
      common. First, ensure the minimum number of matches are present. If min =
      max, continue at the same level without recursing. Otherwise, if
      minimizing, keep trying the rest of the expression and advancing one
      matching character if failing, up to the maximum. Alternatively, if
      maximizing, find the maximum number of characters and work backwards. */
  
      DPRINTF(("matching %c{%d,%d} against subject %.*s\n", fc, min, max,
        max, (char *)eptr));
  
      if (op >= OP_STARI)  /* Caseless */
        {
  #ifdef COMPILE_PCRE8
        /* fc must be < 128 if UTF is enabled. */
        foc = md->fcc[fc];
  #else
  #ifdef SUPPORT_UTF
  #ifdef SUPPORT_UCP
        if (utf && fc > 127)
          foc = UCD_OTHERCASE(fc);
  #else
        if (utf && fc > 127)
          foc = fc;
  #endif /* SUPPORT_UCP */
        else
  #endif /* SUPPORT_UTF */
          foc = TABLE_GET(fc, md->fcc, fc);
  #endif /* COMPILE_PCRE8 */
  
        for (i = 1; i <= min; i++)
          {
          if (eptr >= md->end_subject)
            {
            SCHECK_PARTIAL();
            RRETURN(MATCH_NOMATCH);
            }
          if (fc != *eptr && foc != *eptr) RRETURN(MATCH_NOMATCH);
          eptr++;
          }
        if (min == max) continue;
        if (minimize)
          {
          for (fi = min;; fi++)
            {
            RMATCH(eptr, ecode, offset_top, md, eptrb, RM24);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max) RRETURN(MATCH_NOMATCH);
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            if (fc != *eptr && foc != *eptr) RRETURN(MATCH_NOMATCH);
            eptr++;
            }
          /* Control never gets here */
          }
        else  /* Maximize */
          {
          pp = eptr;
          for (i = min; i < max; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              break;
              }
            if (fc != *eptr && foc != *eptr) break;
            eptr++;
            }
  
          if (possessive) continue;
  
          while (eptr >= pp)
            {
            RMATCH(eptr, ecode, offset_top, md, eptrb, RM25);
            eptr--;
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            }
          RRETURN(MATCH_NOMATCH);
          }
        /* Control never gets here */
        }
  
      /* Caseful comparisons (includes all multi-byte characters) */
  
      else
        {
        for (i = 1; i <= min; i++)
          {
          if (eptr >= md->end_subject)
            {
            SCHECK_PARTIAL();
            RRETURN(MATCH_NOMATCH);
            }
          if (fc != *eptr++) RRETURN(MATCH_NOMATCH);
          }
  
        if (min == max) continue;
  
        if (minimize)
          {
          for (fi = min;; fi++)
            {
            RMATCH(eptr, ecode, offset_top, md, eptrb, RM26);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max) RRETURN(MATCH_NOMATCH);
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            if (fc != *eptr++) RRETURN(MATCH_NOMATCH);
            }
          /* Control never gets here */
          }
        else  /* Maximize */
          {
          pp = eptr;
          for (i = min; i < max; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              break;
              }
            if (fc != *eptr) break;
            eptr++;
            }
          if (possessive) continue;
  
          while (eptr >= pp)
            {
            RMATCH(eptr, ecode, offset_top, md, eptrb, RM27);
            eptr--;
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            }
          RRETURN(MATCH_NOMATCH);
          }
        }
      /* Control never gets here */
  
      /* Match a negated single one-byte character. The character we are
      checking can be multibyte. */
  
      case OP_NOT:
      case OP_NOTI:
      if (eptr >= md->end_subject)
        {
        SCHECK_PARTIAL();
        RRETURN(MATCH_NOMATCH);
        }
  #ifdef SUPPORT_UTF
      if (utf)
        {
        register unsigned int ch, och;
  
        ecode++;
        GETCHARINC(ch, ecode);
        GETCHARINC(c, eptr);
  
        if (op == OP_NOT)
          {
          if (ch == c) RRETURN(MATCH_NOMATCH);
          }
        else
          {
  #ifdef SUPPORT_UCP
          if (ch > 127)
            och = UCD_OTHERCASE(ch);
  #else
          if (ch > 127)
            och = ch;
  #endif /* SUPPORT_UCP */
          else
            och = TABLE_GET(ch, md->fcc, ch);
          if (ch == c || och == c) RRETURN(MATCH_NOMATCH);
          }
        }
      else
  #endif
        {
        register unsigned int ch = ecode[1];
        c = *eptr++;
        if (ch == c || (op == OP_NOTI && TABLE_GET(ch, md->fcc, ch) == c))
          RRETURN(MATCH_NOMATCH);
        ecode += 2;
        }
      break;
  
      /* Match a negated single one-byte character repeatedly. This is almost a
      repeat of the code for a repeated single character, but I haven't found a
      nice way of commoning these up that doesn't require a test of the
      positive/negative option for each character match. Maybe that wouldn't add
      very much to the time taken, but character matching *is* what this is all
      about... */
  
      case OP_NOTEXACT:
      case OP_NOTEXACTI:
      min = max = GET2(ecode, 1);
      ecode += 1 + IMM2_SIZE;
      goto REPEATNOTCHAR;
  
      case OP_NOTUPTO:
      case OP_NOTUPTOI:
      case OP_NOTMINUPTO:
      case OP_NOTMINUPTOI:
      min = 0;
      max = GET2(ecode, 1);
      minimize = *ecode == OP_NOTMINUPTO || *ecode == OP_NOTMINUPTOI;
      ecode += 1 + IMM2_SIZE;
      goto REPEATNOTCHAR;
  
      case OP_NOTPOSSTAR:
      case OP_NOTPOSSTARI:
      possessive = TRUE;
      min = 0;
      max = INT_MAX;
      ecode++;
      goto REPEATNOTCHAR;
  
      case OP_NOTPOSPLUS:
      case OP_NOTPOSPLUSI:
      possessive = TRUE;
      min = 1;
      max = INT_MAX;
      ecode++;
      goto REPEATNOTCHAR;
  
      case OP_NOTPOSQUERY:
      case OP_NOTPOSQUERYI:
      possessive = TRUE;
      min = 0;
      max = 1;
      ecode++;
      goto REPEATNOTCHAR;
  
      case OP_NOTPOSUPTO:
      case OP_NOTPOSUPTOI:
      possessive = TRUE;
      min = 0;
      max = GET2(ecode, 1);
      ecode += 1 + IMM2_SIZE;
      goto REPEATNOTCHAR;
  
      case OP_NOTSTAR:
      case OP_NOTSTARI:
      case OP_NOTMINSTAR:
      case OP_NOTMINSTARI:
      case OP_NOTPLUS:
      case OP_NOTPLUSI:
      case OP_NOTMINPLUS:
      case OP_NOTMINPLUSI:
      case OP_NOTQUERY:
      case OP_NOTQUERYI:
      case OP_NOTMINQUERY:
      case OP_NOTMINQUERYI:
      c = *ecode++ - ((op >= OP_NOTSTARI)? OP_NOTSTARI: OP_NOTSTAR);
      minimize = (c & 1) != 0;
      min = rep_min[c];                 /* Pick up values from tables; */
      max = rep_max[c];                 /* zero for max => infinity */
      if (max == 0) max = INT_MAX;
  
      /* Common code for all repeated single-byte matches. */
  
      REPEATNOTCHAR:
      GETCHARINCTEST(fc, ecode);
  
      /* The code is duplicated for the caseless and caseful cases, for speed,
      since matching characters is likely to be quite common. First, ensure the
      minimum number of matches are present. If min = max, continue at the same
      level without recursing. Otherwise, if minimizing, keep trying the rest of
      the expression and advancing one matching character if failing, up to the
      maximum. Alternatively, if maximizing, find the maximum number of
      characters and work backwards. */
  
      DPRINTF(("negative matching %c{%d,%d} against subject %.*s\n", fc, min, max,
        max, (char *)eptr));
  
      if (op >= OP_NOTSTARI)     /* Caseless */
        {
  #ifdef SUPPORT_UTF
  #ifdef SUPPORT_UCP
        if (utf && fc > 127)
          foc = UCD_OTHERCASE(fc);
  #else
        if (utf && fc > 127)
          foc = fc;
  #endif /* SUPPORT_UCP */
        else
  #endif /* SUPPORT_UTF */
          foc = TABLE_GET(fc, md->fcc, fc);
  
  #ifdef SUPPORT_UTF
        if (utf)
          {
          register unsigned int d;
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            GETCHARINC(d, eptr);
            if (fc == d || (unsigned int)foc == d) RRETURN(MATCH_NOMATCH);
            }
          }
        else
  #endif
        /* Not UTF mode */
          {
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            if (fc == *eptr || foc == *eptr) RRETURN(MATCH_NOMATCH);
            eptr++;
            }
          }
  
        if (min == max) continue;
  
        if (minimize)
          {
  #ifdef SUPPORT_UTF
          if (utf)
            {
            register unsigned int d;
            for (fi = min;; fi++)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM28);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max) RRETURN(MATCH_NOMATCH);
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINC(d, eptr);
              if (fc == d || (unsigned int)foc == d) RRETURN(MATCH_NOMATCH);
              }
            }
          else
  #endif
          /* Not UTF mode */
            {
            for (fi = min;; fi++)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM29);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max) RRETURN(MATCH_NOMATCH);
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              if (fc == *eptr || foc == *eptr) RRETURN(MATCH_NOMATCH);
              eptr++;
              }
            }
          /* Control never gets here */
          }
  
        /* Maximize case */
  
        else
          {
          pp = eptr;
  
  #ifdef SUPPORT_UTF
          if (utf)
            {
            register unsigned int d;
            for (i = min; i < max; i++)
              {
              int len = 1;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              GETCHARLEN(d, eptr, len);
              if (fc == d || (unsigned int)foc == d) break;
              eptr += len;
              }
            if (possessive) continue;
            for(;;)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM30);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (eptr-- == pp) break;        /* Stop if tried at original pos */
              BACKCHAR(eptr);
              }
            }
          else
  #endif
          /* Not UTF mode */
            {
            for (i = min; i < max; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              if (fc == *eptr || foc == *eptr) break;
              eptr++;
              }
            if (possessive) continue;
            while (eptr >= pp)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM31);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              eptr--;
              }
            }
  
          RRETURN(MATCH_NOMATCH);
          }
        /* Control never gets here */
        }
  
      /* Caseful comparisons */
  
      else
        {
  #ifdef SUPPORT_UTF
        if (utf)
          {
          register unsigned int d;
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            GETCHARINC(d, eptr);
            if (fc == d) RRETURN(MATCH_NOMATCH);
            }
          }
        else
  #endif
        /* Not UTF mode */
          {
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            if (fc == *eptr++) RRETURN(MATCH_NOMATCH);
            }
          }
  
        if (min == max) continue;
  
        if (minimize)
          {
  #ifdef SUPPORT_UTF
          if (utf)
            {
            register unsigned int d;
            for (fi = min;; fi++)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM32);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max) RRETURN(MATCH_NOMATCH);
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINC(d, eptr);
              if (fc == d) RRETURN(MATCH_NOMATCH);
              }
            }
          else
  #endif
          /* Not UTF mode */
            {
            for (fi = min;; fi++)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM33);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max) RRETURN(MATCH_NOMATCH);
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              if (fc == *eptr++) RRETURN(MATCH_NOMATCH);
              }
            }
          /* Control never gets here */
          }
  
        /* Maximize case */
  
        else
          {
          pp = eptr;
  
  #ifdef SUPPORT_UTF
          if (utf)
            {
            register unsigned int d;
            for (i = min; i < max; i++)
              {
              int len = 1;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              GETCHARLEN(d, eptr, len);
              if (fc == d) break;
              eptr += len;
              }
            if (possessive) continue;
            for(;;)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM34);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (eptr-- == pp) break;        /* Stop if tried at original pos */
              BACKCHAR(eptr);
              }
            }
          else
  #endif
          /* Not UTF mode */
            {
            for (i = min; i < max; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              if (fc == *eptr) break;
              eptr++;
              }
            if (possessive) continue;
            while (eptr >= pp)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM35);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              eptr--;
              }
            }
  
          RRETURN(MATCH_NOMATCH);
          }
        }
      /* Control never gets here */
  
      /* Match a single character type repeatedly; several different opcodes
      share code. This is very similar to the code for single characters, but we
      repeat it in the interests of efficiency. */
  
      case OP_TYPEEXACT:
      min = max = GET2(ecode, 1);
      minimize = TRUE;
      ecode += 1 + IMM2_SIZE;
      goto REPEATTYPE;
  
      case OP_TYPEUPTO:
      case OP_TYPEMINUPTO:
      min = 0;
      max = GET2(ecode, 1);
      minimize = *ecode == OP_TYPEMINUPTO;
      ecode += 1 + IMM2_SIZE;
      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 += 1 + IMM2_SIZE;
      goto REPEATTYPE;
  
      case OP_TYPESTAR:
      case OP_TYPEMINSTAR:
      case OP_TYPEPLUS:
      case OP_TYPEMINPLUS:
      case OP_TYPEQUERY:
      case OP_TYPEMINQUERY:
      c = *ecode++ - OP_TYPESTAR;
      minimize = (c & 1) != 0;
      min = rep_min[c];                 /* Pick up values from tables; */
      max = rep_max[c];                 /* zero for max => infinity */
      if (max == 0) max = INT_MAX;
  
      /* Common code for all repeated single character type matches. Note that
      in UTF-8 mode, '.' matches a character of any length, but for the other
      character types, the valid characters are all one-byte long. */
  
      REPEATTYPE:
      ctype = *ecode++;      /* Code for the character type */
  
  #ifdef SUPPORT_UCP
      if (ctype == OP_PROP || ctype == OP_NOTPROP)
        {
        prop_fail_result = ctype == OP_NOTPROP;
        prop_type = *ecode++;
        prop_value = *ecode++;
        }
      else prop_type = -1;
  #endif
  
      /* First, ensure the minimum number of matches are present. Use inline
      code for maximizing the speed, and do the type test once at the start
      (i.e. keep it out of the loop). Separate the UTF-8 code completely as that
      is tidier. Also separate the UCP code, which can be the same for both UTF-8
      and single-bytes. */
  
      if (min > 0)
        {
  #ifdef SUPPORT_UCP
        if (prop_type >= 0)
          {
          switch(prop_type)
            {
            case PT_ANY:
            if (prop_fail_result) RRETURN(MATCH_NOMATCH);
            for (i = 1; i <= min; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINCTEST(c, eptr);
              }
            break;
  
            case PT_LAMP:
            for (i = 1; i <= min; i++)
              {
              int chartype;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINCTEST(c, eptr);
              chartype = UCD_CHARTYPE(c);
              if ((chartype == ucp_Lu ||
                   chartype == ucp_Ll ||
                   chartype == ucp_Lt) == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
            break;
  
            case PT_GC:
            for (i = 1; i <= min; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINCTEST(c, eptr);
              if ((UCD_CATEGORY(c) == prop_value) == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
            break;
  
            case PT_PC:
            for (i = 1; i <= min; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINCTEST(c, eptr);
              if ((UCD_CHARTYPE(c) == prop_value) == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
            break;
  
            case PT_SC:
            for (i = 1; i <= min; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINCTEST(c, eptr);
              if ((UCD_SCRIPT(c) == prop_value) == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
            break;
  
            case PT_ALNUM:
            for (i = 1; i <= min; i++)
              {
              int category;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINCTEST(c, eptr);
              category = UCD_CATEGORY(c);
              if ((category == ucp_L || category == ucp_N) == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
            break;
  
            case PT_SPACE:    /* Perl space */
            for (i = 1; i <= min; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINCTEST(c, eptr);
              if ((UCD_CATEGORY(c) == ucp_Z || c == CHAR_HT || c == CHAR_NL ||
                   c == CHAR_FF || c == CHAR_CR)
                     == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
            break;
  
            case PT_PXSPACE:  /* POSIX space */
            for (i = 1; i <= min; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINCTEST(c, eptr);
              if ((UCD_CATEGORY(c) == ucp_Z || c == CHAR_HT || c == CHAR_NL ||
                   c == CHAR_VT || c == CHAR_FF || c == CHAR_CR)
                     == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
            break;
  
            case PT_WORD:
            for (i = 1; i <= min; i++)
              {
              int category;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINCTEST(c, eptr);
              category = UCD_CATEGORY(c);
              if ((category == ucp_L || category == ucp_N || c == CHAR_UNDERSCORE)
                     == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
            break;
  
            /* This should not occur */
  
            default:
            RRETURN(PCRE_ERROR_INTERNAL);
            }
          }
  
        /* Match extended Unicode sequences. We will get here only if the
        support is in the binary; otherwise a compile-time error occurs. */
  
        else if (ctype == OP_EXTUNI)
          {
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            GETCHARINCTEST(c, eptr);
            if (UCD_CATEGORY(c) == ucp_M) RRETURN(MATCH_NOMATCH);
            while (eptr < md->end_subject)
              {
              int len = 1;
              if (!utf) c = *eptr; else { GETCHARLEN(c, eptr, len); }
              if (UCD_CATEGORY(c) != ucp_M) break;
              eptr += len;
              }
            CHECK_PARTIAL();
            }
          }
  
        else
  #endif     /* SUPPORT_UCP */
  
  /* Handle all other cases when the coding is UTF-8 */
  
  #ifdef SUPPORT_UTF
        if (utf) switch(ctype)
          {
          case OP_ANY:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            if (IS_NEWLINE(eptr)) RRETURN(MATCH_NOMATCH);
            if (md->partial != 0 &&
                eptr + 1 >= md->end_subject &&
                NLBLOCK->nltype == NLTYPE_FIXED &&
                NLBLOCK->nllen == 2 &&
                *eptr == NLBLOCK->nl[0])
              {
              md->hitend = TRUE;
              if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL);
              }
            eptr++;
            ACROSSCHAR(eptr < md->end_subject, *eptr, eptr++);
            }
          break;
  
          case OP_ALLANY:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            eptr++;
            ACROSSCHAR(eptr < md->end_subject, *eptr, eptr++);
            }
          break;
  
          case OP_ANYBYTE:
          if (eptr > md->end_subject - min) RRETURN(MATCH_NOMATCH);
          eptr += min;
          break;
  
          case OP_ANYNL:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              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)
              {
              SCHECK_PARTIAL();
              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)
              {
              SCHECK_PARTIAL();
              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)
              {
              SCHECK_PARTIAL();
              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)
              {
              SCHECK_PARTIAL();
              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++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            GETCHARINC(c, eptr);
            if (c < 128 && (md->ctypes[c] & ctype_digit) != 0)
              RRETURN(MATCH_NOMATCH);
            }
          break;
  
          case OP_DIGIT:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            if (*eptr >= 128 || (md->ctypes[*eptr] & ctype_digit) == 0)
              RRETURN(MATCH_NOMATCH);
            eptr++;
            /* No need to skip more bytes - we know it's a 1-byte character */
            }
          break;
  
          case OP_NOT_WHITESPACE:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            if (*eptr < 128 && (md->ctypes[*eptr] & ctype_space) != 0)
              RRETURN(MATCH_NOMATCH);
            eptr++;
            ACROSSCHAR(eptr < md->end_subject, *eptr, eptr++);
            }
          break;
  
          case OP_WHITESPACE:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            if (*eptr >= 128 || (md->ctypes[*eptr] & ctype_space) == 0)
              RRETURN(MATCH_NOMATCH);
            eptr++;
            /* No need to skip more bytes - we know it's a 1-byte character */
            }
          break;
  
          case OP_NOT_WORDCHAR:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            if (*eptr < 128 && (md->ctypes[*eptr] & ctype_word) != 0)
              RRETURN(MATCH_NOMATCH);
            eptr++;
            ACROSSCHAR(eptr < md->end_subject, *eptr, eptr++);
            }
          break;
  
          case OP_WORDCHAR:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            if (*eptr >= 128 || (md->ctypes[*eptr] & ctype_word) == 0)
              RRETURN(MATCH_NOMATCH);
            eptr++;
            /* No need to skip more bytes - we know it's a 1-byte character */
            }
          break;
  
          default:
          RRETURN(PCRE_ERROR_INTERNAL);
          }  /* End switch(ctype) */
  
        else
  #endif     /* SUPPORT_UTF */
  
        /* Code for the non-UTF-8 case for minimum matching of operators other
        than OP_PROP and OP_NOTPROP. */
  
        switch(ctype)
          {
          case OP_ANY:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            if (IS_NEWLINE(eptr)) RRETURN(MATCH_NOMATCH);
            if (md->partial != 0 &&
                eptr + 1 >= md->end_subject &&
                NLBLOCK->nltype == NLTYPE_FIXED &&
                NLBLOCK->nllen == 2 &&
                *eptr == NLBLOCK->nl[0])
              {
              md->hitend = TRUE;
              if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL);
              }
            eptr++;
            }
          break;
  
          case OP_ALLANY:
          if (eptr > md->end_subject - min)
            {
            SCHECK_PARTIAL();
            RRETURN(MATCH_NOMATCH);
            }
          eptr += min;
          break;
  
          case OP_ANYBYTE:
          if (eptr > md->end_subject - min)
            {
            SCHECK_PARTIAL();
            RRETURN(MATCH_NOMATCH);
            }
          eptr += min;
          break;
  
          case OP_ANYNL:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              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:
  #ifdef COMPILE_PCRE16
              case 0x2028:
              case 0x2029:
  #endif
              if (md->bsr_anycrlf) RRETURN(MATCH_NOMATCH);
              break;
              }
            }
          break;
  
          case OP_NOT_HSPACE:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            switch(*eptr++)
              {
              default: break;
              case 0x09:      /* HT */
              case 0x20:      /* SPACE */
              case 0xa0:      /* NBSP */
  #ifdef COMPILE_PCRE16
              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 */
  #endif
              RRETURN(MATCH_NOMATCH);
              }
            }
          break;
  
          case OP_HSPACE:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            switch(*eptr++)
              {
              default: RRETURN(MATCH_NOMATCH);
              case 0x09:      /* HT */
              case 0x20:      /* SPACE */
              case 0xa0:      /* NBSP */
  #ifdef COMPILE_PCRE16
              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 */
  #endif
              break;
              }
            }
          break;
  
          case OP_NOT_VSPACE:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            switch(*eptr++)
              {
              default: break;
              case 0x0a:      /* LF */
              case 0x0b:      /* VT */
              case 0x0c:      /* FF */
              case 0x0d:      /* CR */
              case 0x85:      /* NEL */
  #ifdef COMPILE_PCRE16
              case 0x2028:    /* LINE SEPARATOR */
              case 0x2029:    /* PARAGRAPH SEPARATOR */
  #endif
              RRETURN(MATCH_NOMATCH);
              }
            }
          break;
  
          case OP_VSPACE:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            switch(*eptr++)
              {
              default: RRETURN(MATCH_NOMATCH);
              case 0x0a:      /* LF */
              case 0x0b:      /* VT */
              case 0x0c:      /* FF */
              case 0x0d:      /* CR */
              case 0x85:      /* NEL */
  #ifdef COMPILE_PCRE16
              case 0x2028:    /* LINE SEPARATOR */
              case 0x2029:    /* PARAGRAPH SEPARATOR */
  #endif
              break;
              }
            }
          break;
  
          case OP_NOT_DIGIT:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            if (MAX_255(*eptr) && (md->ctypes[*eptr] & ctype_digit) != 0)
              RRETURN(MATCH_NOMATCH);
            eptr++;
            }
          break;
  
          case OP_DIGIT:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            if (!MAX_255(*eptr) || (md->ctypes[*eptr] & ctype_digit) == 0)
              RRETURN(MATCH_NOMATCH);
            eptr++;
            }
          break;
  
          case OP_NOT_WHITESPACE:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            if (MAX_255(*eptr) && (md->ctypes[*eptr] & ctype_space) != 0)
              RRETURN(MATCH_NOMATCH);
            eptr++;
            }
          break;
  
          case OP_WHITESPACE:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            if (!MAX_255(*eptr) || (md->ctypes[*eptr] & ctype_space) == 0)
              RRETURN(MATCH_NOMATCH);
            eptr++;
            }
          break;
  
          case OP_NOT_WORDCHAR:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            if (MAX_255(*eptr) && (md->ctypes[*eptr] & ctype_word) != 0)
              RRETURN(MATCH_NOMATCH);
            eptr++;
            }
          break;
  
          case OP_WORDCHAR:
          for (i = 1; i <= min; i++)
            {
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            if (!MAX_255(*eptr) || (md->ctypes[*eptr] & ctype_word) == 0)
              RRETURN(MATCH_NOMATCH);
            eptr++;
            }
          break;
  
          default:
          RRETURN(PCRE_ERROR_INTERNAL);
          }
        }
  
      /* If min = max, continue at the same level without recursing */
  
      if (min == max) continue;
  
      /* If minimizing, we have to test the rest of the pattern before each
      subsequent match. Again, separate the UTF-8 case for speed, and also
      separate the UCP cases. */
  
      if (minimize)
        {
  #ifdef SUPPORT_UCP
        if (prop_type >= 0)
          {
          switch(prop_type)
            {
            case PT_ANY:
            for (fi = min;; fi++)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM36);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max) RRETURN(MATCH_NOMATCH);
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINCTEST(c, eptr);
              if (prop_fail_result) RRETURN(MATCH_NOMATCH);
              }
            /* Control never gets here */
  
            case PT_LAMP:
            for (fi = min;; fi++)
              {
              int chartype;
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM37);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max) RRETURN(MATCH_NOMATCH);
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINCTEST(c, eptr);
              chartype = UCD_CHARTYPE(c);
              if ((chartype == ucp_Lu ||
                   chartype == ucp_Ll ||
                   chartype == ucp_Lt) == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
            /* Control never gets here */
  
            case PT_GC:
            for (fi = min;; fi++)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM38);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max) RRETURN(MATCH_NOMATCH);
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINCTEST(c, eptr);
              if ((UCD_CATEGORY(c) == prop_value) == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
            /* Control never gets here */
  
            case PT_PC:
            for (fi = min;; fi++)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM39);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max) RRETURN(MATCH_NOMATCH);
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINCTEST(c, eptr);
              if ((UCD_CHARTYPE(c) == prop_value) == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
            /* Control never gets here */
  
            case PT_SC:
            for (fi = min;; fi++)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM40);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max) RRETURN(MATCH_NOMATCH);
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINCTEST(c, eptr);
              if ((UCD_SCRIPT(c) == prop_value) == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
            /* Control never gets here */
  
            case PT_ALNUM:
            for (fi = min;; fi++)
              {
              int category;
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM59);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max) RRETURN(MATCH_NOMATCH);
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINCTEST(c, eptr);
              category = UCD_CATEGORY(c);
              if ((category == ucp_L || category == ucp_N) == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
            /* Control never gets here */
  
            case PT_SPACE:    /* Perl space */
            for (fi = min;; fi++)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM60);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max) RRETURN(MATCH_NOMATCH);
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINCTEST(c, eptr);
              if ((UCD_CATEGORY(c) == ucp_Z || c == CHAR_HT || c == CHAR_NL ||
                   c == CHAR_FF || c == CHAR_CR)
                     == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
            /* Control never gets here */
  
            case PT_PXSPACE:  /* POSIX space */
            for (fi = min;; fi++)
              {
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM61);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max) RRETURN(MATCH_NOMATCH);
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINCTEST(c, eptr);
              if ((UCD_CATEGORY(c) == ucp_Z || c == CHAR_HT || c == CHAR_NL ||
                   c == CHAR_VT || c == CHAR_FF || c == CHAR_CR)
                     == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
            /* Control never gets here */
  
            case PT_WORD:
            for (fi = min;; fi++)
              {
              int category;
              RMATCH(eptr, ecode, offset_top, md, eptrb, RM62);
              if (rrc != MATCH_NOMATCH) RRETURN(rrc);
              if (fi >= max) RRETURN(MATCH_NOMATCH);
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                RRETURN(MATCH_NOMATCH);
                }
              GETCHARINCTEST(c, eptr);
              category = UCD_CATEGORY(c);
              if ((category == ucp_L ||
                   category == ucp_N ||
                   c == CHAR_UNDERSCORE)
                     == prop_fail_result)
                RRETURN(MATCH_NOMATCH);
              }
            /* Control never gets here */
  
            /* This should never occur */
  
            default:
            RRETURN(PCRE_ERROR_INTERNAL);
            }
          }
  
        /* Match extended Unicode sequences. We will get here only if the
        support is in the binary; otherwise a compile-time error occurs. */
  
        else if (ctype == OP_EXTUNI)
          {
          for (fi = min;; fi++)
            {
            RMATCH(eptr, ecode, offset_top, md, eptrb, RM41);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max) RRETURN(MATCH_NOMATCH);
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            GETCHARINCTEST(c, eptr);
            if (UCD_CATEGORY(c) == ucp_M) RRETURN(MATCH_NOMATCH);
            while (eptr < md->end_subject)
              {
              int len = 1;
              if (!utf) c = *eptr; else { GETCHARLEN(c, eptr, len); }
              if (UCD_CATEGORY(c) != ucp_M) break;
              eptr += len;
              }
            CHECK_PARTIAL();
            }
          }
        else
  #endif     /* SUPPORT_UCP */
  
  #ifdef SUPPORT_UTF
        if (utf)
          {
          for (fi = min;; fi++)
            {
            RMATCH(eptr, ecode, offset_top, md, eptrb, RM42);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max) RRETURN(MATCH_NOMATCH);
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            if (ctype == OP_ANY && IS_NEWLINE(eptr))
              RRETURN(MATCH_NOMATCH);
            GETCHARINC(c, eptr);
            switch(ctype)
              {
              case OP_ANY:               /* This is the non-NL case */
              if (md->partial != 0 &&    /* Take care with CRLF partial */
                  eptr >= md->end_subject &&
                  NLBLOCK->nltype == NLTYPE_FIXED &&
                  NLBLOCK->nllen == 2 &&
                  c == NLBLOCK->nl[0])
                {
                md->hitend = TRUE;
                if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL);
                }
              break;
  
              case OP_ALLANY:
              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);
              break;
  
              case OP_DIGIT:
              if (c >= 256 || (md->ctypes[c] & ctype_digit) == 0)
                RRETURN(MATCH_NOMATCH);
              break;
  
              case OP_NOT_WHITESPACE:
              if (c < 256 && (md->ctypes[c] & ctype_space) != 0)
                RRETURN(MATCH_NOMATCH);
              break;
  
              case OP_WHITESPACE:
              if (c >= 256 || (md->ctypes[c] & ctype_space) == 0)
                RRETURN(MATCH_NOMATCH);
              break;
  
              case OP_NOT_WORDCHAR:
              if (c < 256 && (md->ctypes[c] & ctype_word) != 0)
                RRETURN(MATCH_NOMATCH);
              break;
  
              case OP_WORDCHAR:
              if (c >= 256 || (md->ctypes[c] & ctype_word) == 0)
                RRETURN(MATCH_NOMATCH);
              break;
  
              default:
              RRETURN(PCRE_ERROR_INTERNAL);
              }
            }
          }
        else
  #endif
        /* Not UTF mode */
          {
          for (fi = min;; fi++)
            {
            RMATCH(eptr, ecode, offset_top, md, eptrb, RM43);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max) RRETURN(MATCH_NOMATCH);
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              RRETURN(MATCH_NOMATCH);
              }
            if (ctype == OP_ANY && IS_NEWLINE(eptr))
              RRETURN(MATCH_NOMATCH);
            c = *eptr++;
            switch(ctype)
              {
              case OP_ANY:               /* This is the non-NL case */
              if (md->partial != 0 &&    /* Take care with CRLF partial */
                  eptr >= md->end_subject &&
                  NLBLOCK->nltype == NLTYPE_FIXED &&
                  NLBLOCK->nllen == 2 &&
                  c == NLBLOCK->nl[0])
                {
                md->hitend = TRUE;
                if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL);
                }
              break;
  
              case OP_ALLANY:
              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:
  #ifdef COMPILE_PCRE16
                case 0x2028:
                case 0x2029:
  #endif
                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 */
  #ifdef COMPILE_PCRE16
                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 */
  #endif
                RRETURN(MATCH_NOMATCH);
                }
              break;
  
              case OP_HSPACE:
              switch(c)
                {
                default: RRETURN(MATCH_NOMATCH);
                case 0x09:      /* HT */
                case 0x20:      /* SPACE */
                case 0xa0:      /* NBSP */
  #ifdef COMPILE_PCRE16
                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 */
  #endif
                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 */
  #ifdef COMPILE_PCRE16
                case 0x2028:    /* LINE SEPARATOR */
                case 0x2029:    /* PARAGRAPH SEPARATOR */
  #endif
                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 */
  #ifdef COMPILE_PCRE16
                case 0x2028:    /* LINE SEPARATOR */
                case 0x2029:    /* PARAGRAPH SEPARATOR */
  #endif
                break;
                }
              break;
  
              case OP_NOT_DIGIT:
              if (MAX_255(c) && (md->ctypes[c] & ctype_digit) != 0) RRETURN(MATCH_NOMATCH);
              break;
  
              case OP_DIGIT:
              if (!MAX_255(c) || (md->ctypes[c] & ctype_digit) == 0) RRETURN(MATCH_NOMATCH);
              break;
  
              case OP_NOT_WHITESPACE:
              if (MAX_255(c) && (md->ctypes[c] & ctype_space) != 0) RRETURN(MATCH_NOMATCH);
              break;
  
              case OP_WHITESPACE:
              if (!MAX_255(c) || (md->ctypes[c] & ctype_space) == 0) RRETURN(MATCH_NOMATCH);
              break;
  
              case OP_NOT_WORDCHAR:
              if (MAX_255(c) && (md->ctypes[c] & ctype_word) != 0) RRETURN(MATCH_NOMATCH);
              break;
  
              case OP_WORDCHAR:
              if (!MAX_255(c) || (md->ctypes[c] & ctype_word) == 0) RRETURN(MATCH_NOMATCH);
              break;
  
              default:
              RRETURN(PCRE_ERROR_INTERNAL);
              }
            }
          }
        /* Control never gets here */
        }
  
      /* 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. */
  
      else
        {
        pp = eptr;  /* Remember where we started */
  
  #ifdef SUPPORT_UCP
        if (prop_type >= 0)
          {
          switch(prop_type)
            {
            case PT_ANY:
            for (i = min; i < max; i++)
              {
              int len = 1;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              GETCHARLENTEST(c, eptr, len);
              if (prop_fail_result) break;
              eptr+= len;
              }
            break;
  
            case PT_LAMP:
            for (i = min; i < max; i++)
              {
              int chartype;
              int len = 1;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              GETCHARLENTEST(c, eptr, len);
              chartype = UCD_CHARTYPE(c);
              if ((chartype == ucp_Lu ||
                   chartype == ucp_Ll ||
                   chartype == ucp_Lt) == prop_fail_result)
                break;
              eptr+= len;
              }
            break;
  
            case PT_GC:
            for (i = min; i < max; i++)
              {
              int len = 1;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              GETCHARLENTEST(c, eptr, len);
              if ((UCD_CATEGORY(c) == prop_value) == prop_fail_result) break;
              eptr+= len;
              }
            break;
  
            case PT_PC:
            for (i = min; i < max; i++)
              {
              int len = 1;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              GETCHARLENTEST(c, eptr, len);
              if ((UCD_CHARTYPE(c) == prop_value) == prop_fail_result) break;
              eptr+= len;
              }
            break;
  
            case PT_SC:
            for (i = min; i < max; i++)
              {
              int len = 1;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              GETCHARLENTEST(c, eptr, len);
              if ((UCD_SCRIPT(c) == prop_value) == prop_fail_result) break;
              eptr+= len;
              }
            break;
  
            case PT_ALNUM:
            for (i = min; i < max; i++)
              {
              int category;
              int len = 1;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              GETCHARLENTEST(c, eptr, len);
              category = UCD_CATEGORY(c);
              if ((category == ucp_L || category == ucp_N) == prop_fail_result)
                break;
              eptr+= len;
              }
            break;
  
            case PT_SPACE:    /* Perl space */
            for (i = min; i < max; i++)
              {
              int len = 1;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              GETCHARLENTEST(c, eptr, len);
              if ((UCD_CATEGORY(c) == ucp_Z || c == CHAR_HT || c == CHAR_NL ||
                   c == CHAR_FF || c == CHAR_CR)
                   == prop_fail_result)
                break;
              eptr+= len;
              }
            break;
  
            case PT_PXSPACE:  /* POSIX space */
            for (i = min; i < max; i++)
              {
              int len = 1;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              GETCHARLENTEST(c, eptr, len);
              if ((UCD_CATEGORY(c) == ucp_Z || c == CHAR_HT || c == CHAR_NL ||
                   c == CHAR_VT || c == CHAR_FF || c == CHAR_CR)
                   == prop_fail_result)
                break;
              eptr+= len;
              }
            break;
  
            case PT_WORD:
            for (i = min; i < max; i++)
              {
              int category;
              int len = 1;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              GETCHARLENTEST(c, eptr, len);
              category = UCD_CATEGORY(c);
              if ((category == ucp_L || category == ucp_N ||
                   c == CHAR_UNDERSCORE) == prop_fail_result)
                break;
              eptr+= len;
              }
            break;
  
            default:
            RRETURN(PCRE_ERROR_INTERNAL);
            }
  
          /* eptr is now past the end of the maximum run */
  
          if (possessive) continue;
          for(;;)
            {
            RMATCH(eptr, ecode, offset_top, md, eptrb, RM44);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (eptr-- == pp) break;        /* Stop if tried at original pos */
            if (utf) BACKCHAR(eptr);
            }
          }
  
        /* Match extended Unicode sequences. We will get here only if the
        support is in the binary; otherwise a compile-time error occurs. */
  
        else if (ctype == OP_EXTUNI)
          {
          for (i = min; i < max; i++)
            {
            int len = 1;
            if (eptr >= md->end_subject)
              {
              SCHECK_PARTIAL();
              break;
              }
            if (!utf) c = *eptr; else { GETCHARLEN(c, eptr, len); }
            if (UCD_CATEGORY(c) == ucp_M) break;
            eptr += len;
            while (eptr < md->end_subject)
              {
              len = 1;
              if (!utf) c = *eptr; else { GETCHARLEN(c, eptr, len); }
              if (UCD_CATEGORY(c) != ucp_M) break;
              eptr += len;
              }
            CHECK_PARTIAL();
            }
  
          /* eptr is now past the end of the maximum run */
  
          if (possessive) continue;
  
          for(;;)
            {
            RMATCH(eptr, ecode, offset_top, md, eptrb, RM45);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (eptr-- == pp) break;        /* Stop if tried at original pos */
            for (;;)                        /* Move back over one extended */
              {
              if (!utf) c = *eptr; else
                {
                BACKCHAR(eptr);
                GETCHAR(c, eptr);
                }
              if (UCD_CATEGORY(c) != ucp_M) break;
              eptr--;
              }
            }
          }
  
        else
  #endif   /* SUPPORT_UCP */
  
  #ifdef SUPPORT_UTF
        if (utf)
          {
          switch(ctype)
            {
            case OP_ANY:
            if (max < INT_MAX)
              {
              for (i = min; i < max; i++)
                {
                if (eptr >= md->end_subject)
                  {
                  SCHECK_PARTIAL();
                  break;
                  }
                if (IS_NEWLINE(eptr)) break;
                if (md->partial != 0 &&    /* Take care with CRLF partial */
                    eptr + 1 >= md->end_subject &&
                    NLBLOCK->nltype == NLTYPE_FIXED &&
                    NLBLOCK->nllen == 2 &&
                    *eptr == NLBLOCK->nl[0])
                  {
                  md->hitend = TRUE;
                  if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL);
                  }
                eptr++;
                ACROSSCHAR(eptr < md->end_subject, *eptr, eptr++);
                }
              }
  
            /* Handle unlimited UTF-8 repeat */
  
            else
              {
              for (i = min; i < max; i++)
                {
                if (eptr >= md->end_subject)
                  {
                  SCHECK_PARTIAL();
                  break;
                  }
                if (IS_NEWLINE(eptr)) break;
                if (md->partial != 0 &&    /* Take care with CRLF partial */
                    eptr + 1 >= md->end_subject &&
                    NLBLOCK->nltype == NLTYPE_FIXED &&
                    NLBLOCK->nllen == 2 &&
                    *eptr == NLBLOCK->nl[0])
                  {
                  md->hitend = TRUE;
                  if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL);
                  }
                eptr++;
                ACROSSCHAR(eptr < md->end_subject, *eptr, eptr++);
                }
              }
            break;
  
            case OP_ALLANY:
            if (max < INT_MAX)
              {
              for (i = min; i < max; i++)
                {
                if (eptr >= md->end_subject)
                  {
                  SCHECK_PARTIAL();
                  break;
                  }
                eptr++;
                ACROSSCHAR(eptr < md->end_subject, *eptr, eptr++);
                }
              }
            else
              {
              eptr = md->end_subject;   /* Unlimited UTF-8 repeat */
              SCHECK_PARTIAL();
              }
            break;
  
            /* The byte case is the same as non-UTF8 */
  
            case OP_ANYBYTE:
            c = max - min;
            if (c > (unsigned int)(md->end_subject - eptr))
              {
              eptr = md->end_subject;
              SCHECK_PARTIAL();
              }
            else eptr += c;
            break;
  
            case OP_ANYNL:
            for (i = min; i < max; i++)
              {
              int len = 1;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                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)
                {
                SCHECK_PARTIAL();
                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)
                {
                SCHECK_PARTIAL();
                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++)
              {
              int len = 1;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              GETCHARLEN(c, eptr, len);
              if (c < 256 && (md->ctypes[c] & ctype_digit) != 0) break;
              eptr+= len;
              }
            break;
  
            case OP_DIGIT:
            for (i = min; i < max; i++)
              {
              int len = 1;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              GETCHARLEN(c, eptr, len);
              if (c >= 256 ||(md->ctypes[c] & ctype_digit) == 0) break;
              eptr+= len;
              }
            break;
  
            case OP_NOT_WHITESPACE:
            for (i = min; i < max; i++)
              {
              int len = 1;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              GETCHARLEN(c, eptr, len);
              if (c < 256 && (md->ctypes[c] & ctype_space) != 0) break;
              eptr+= len;
              }
            break;
  
            case OP_WHITESPACE:
            for (i = min; i < max; i++)
              {
              int len = 1;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              GETCHARLEN(c, eptr, len);
              if (c >= 256 ||(md->ctypes[c] & ctype_space) == 0) break;
              eptr+= len;
              }
            break;
  
            case OP_NOT_WORDCHAR:
            for (i = min; i < max; i++)
              {
              int len = 1;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              GETCHARLEN(c, eptr, len);
              if (c < 256 && (md->ctypes[c] & ctype_word) != 0) break;
              eptr+= len;
              }
            break;
  
            case OP_WORDCHAR:
            for (i = min; i < max; i++)
              {
              int len = 1;
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              GETCHARLEN(c, eptr, len);
              if (c >= 256 || (md->ctypes[c] & ctype_word) == 0) break;
              eptr+= len;
              }
            break;
  
            default:
            RRETURN(PCRE_ERROR_INTERNAL);
            }
  
          /* eptr is now past the end of the maximum run. If possessive, we are
          done (no backing up). Otherwise, match at this position; anything other
          than no match is immediately returned. For nomatch, back up one
          character, unless we are matching \R and the last thing matched was
          \r\n, in which case, back up two bytes. */
  
          if (possessive) continue;
          for(;;)
            {
            RMATCH(eptr, ecode, offset_top, md, eptrb, RM46);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (eptr-- == pp) break;        /* Stop if tried at original pos */
            BACKCHAR(eptr);
            if (ctype == OP_ANYNL && eptr > pp  && *eptr == '\n' &&
                eptr[-1] == '\r') eptr--;
            }
          }
        else
  #endif  /* SUPPORT_UTF */
        /* Not UTF mode */
          {
          switch(ctype)
            {
            case OP_ANY:
            for (i = min; i < max; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              if (IS_NEWLINE(eptr)) break;
              if (md->partial != 0 &&    /* Take care with CRLF partial */
                  eptr + 1 >= md->end_subject &&
                  NLBLOCK->nltype == NLTYPE_FIXED &&
                  NLBLOCK->nllen == 2 &&
                  *eptr == NLBLOCK->nl[0])
                {
                md->hitend = TRUE;
                if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL);
                }
              eptr++;
              }
            break;
  
            case OP_ALLANY:
            case OP_ANYBYTE:
            c = max - min;
            if (c > (unsigned int)(md->end_subject - eptr))
              {
              eptr = md->end_subject;
              SCHECK_PARTIAL();
              }
            else eptr += c;
            break;
  
            case OP_ANYNL:
            for (i = min; i < max; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                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
  #ifdef COMPILE_PCRE16
                  && c != 0x2028 && c != 0x2029
  #endif
                  ))) break;
                eptr++;
                }
              }
            break;
  
            case OP_NOT_HSPACE:
            for (i = min; i < max; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              c = *eptr;
              if (c == 0x09 || c == 0x20 || c == 0xa0
  #ifdef COMPILE_PCRE16
                || c == 0x1680 || c == 0x180e || (c >= 0x2000 && c <= 0x200A)
                || c == 0x202f || c == 0x205f || c == 0x3000
  #endif
                ) break;
              eptr++;
              }
            break;
  
            case OP_HSPACE:
            for (i = min; i < max; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              c = *eptr;
              if (c != 0x09 && c != 0x20 && c != 0xa0
  #ifdef COMPILE_PCRE16
                && c != 0x1680 && c != 0x180e && (c < 0x2000 || c > 0x200A)
                && c != 0x202f && c != 0x205f && c != 0x3000
  #endif
                ) break;
              eptr++;
              }
            break;
  
            case OP_NOT_VSPACE:
            for (i = min; i < max; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              c = *eptr;
              if (c == 0x0a || c == 0x0b || c == 0x0c || c == 0x0d || c == 0x85
  #ifdef COMPILE_PCRE16
                || c == 0x2028 || c == 0x2029
  #endif
                ) break;
              eptr++;
              }
            break;
  
            case OP_VSPACE:
            for (i = min; i < max; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              c = *eptr;
              if (c != 0x0a && c != 0x0b && c != 0x0c && c != 0x0d && c != 0x85
  #ifdef COMPILE_PCRE16
                && c != 0x2028 && c != 0x2029
  #endif
                ) break;
              eptr++;
              }
            break;
  
            case OP_NOT_DIGIT:
            for (i = min; i < max; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              if (MAX_255(*eptr) && (md->ctypes[*eptr] & ctype_digit) != 0) break;
              eptr++;
              }
            break;
  
            case OP_DIGIT:
            for (i = min; i < max; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              if (!MAX_255(*eptr) || (md->ctypes[*eptr] & ctype_digit) == 0) break;
              eptr++;
              }
            break;
  
            case OP_NOT_WHITESPACE:
            for (i = min; i < max; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              if (MAX_255(*eptr) && (md->ctypes[*eptr] & ctype_space) != 0) break;
              eptr++;
              }
            break;
  
            case OP_WHITESPACE:
            for (i = min; i < max; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              if (!MAX_255(*eptr) || (md->ctypes[*eptr] & ctype_space) == 0) break;
              eptr++;
              }
            break;
  
            case OP_NOT_WORDCHAR:
            for (i = min; i < max; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              if (MAX_255(*eptr) && (md->ctypes[*eptr] & ctype_word) != 0) break;
              eptr++;
              }
            break;
  
            case OP_WORDCHAR:
            for (i = min; i < max; i++)
              {
              if (eptr >= md->end_subject)
                {
                SCHECK_PARTIAL();
                break;
                }
              if (!MAX_255(*eptr) || (md->ctypes[*eptr] & ctype_word) == 0) break;
              eptr++;
              }
            break;
  
            default:
            RRETURN(PCRE_ERROR_INTERNAL);
            }
  
          /* eptr is now past the end of the maximum run. If possessive, we are
          done (no backing up). Otherwise, match at this position; anything other
          than no match is immediately returned. For nomatch, back up one
          character (byte), unless we are matching \R and the last thing matched
          was \r\n, in which case, back up two bytes. */
  
          if (possessive) continue;
          while (eptr >= pp)
            {
            RMATCH(eptr, ecode, offset_top, md, eptrb, RM47);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            eptr--;
            if (ctype == OP_ANYNL && eptr > pp  && *eptr == '\n' &&
                eptr[-1] == '\r') eptr--;
            }
          }
  
        /* Get here if we can't make it match with any permitted repetitions */
  
        RRETURN(MATCH_NOMATCH);
        }
      /* Control never gets here */
  
      /* There's been some horrible disaster. 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_OPCODE);
      }
  
    /* Do not stick any code in here without much thought; it is assumed
    that "continue" in the code above comes out to here to repeat the main
    loop. */
  
    }             /* 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(17)
    LBL(19) LBL(24) LBL(25) LBL(26) LBL(27) LBL(29) LBL(31) LBL(33)
    LBL(35) LBL(43) LBL(47) LBL(48) LBL(49) LBL(50) LBL(51) LBL(52)
    LBL(53) LBL(54) LBL(55) LBL(56) LBL(57) LBL(58) LBL(63) LBL(64)
    LBL(65) LBL(66)
  #if defined SUPPORT_UTF || !defined COMPILE_PCRE8
    LBL(21)
  #endif
  #ifdef SUPPORT_UTF
    LBL(16) LBL(18) LBL(20)
    LBL(22) LBL(23) LBL(28) LBL(30)
    LBL(32) LBL(34) LBL(42) LBL(46)
  #ifdef SUPPORT_UCP
    LBL(36) LBL(37) LBL(38) LBL(39) LBL(40) LBL(41) LBL(44) LBL(45)
    LBL(59) LBL(60) LBL(61) LBL(62)
  #endif  /* SUPPORT_UCP */
  #endif  /* SUPPORT_UTF */
    default:
    DPRINTF(("jump error in pcre match: label %d non-existent\n", frame->Xwhere));
  
  printf("+++jump error in pcre match: label %d non-existent\n", frame->Xwhere);
  
    return PCRE_ERROR_INTERNAL;
    }
  #undef LBL
  #endif  /* NO_RECURSE */
  }
  
  
  /***************************************************************************
  ****************************************************************************
                     RECURSION IN THE match() FUNCTION
  
  Undefine all the macros that were defined above to handle this. */
  
  #ifdef NO_RECURSE
  #undef eptr
  #undef ecode
  #undef mstart
  #undef offset_top
  #undef eptrb
  #undef flags
  
  #undef callpat
  #undef charptr
  #undef data
  #undef next
  #undef pp
  #undef prev
  #undef saved_eptr
  
  #undef new_recursive
  
  #undef cur_is_word
  #undef condition
  #undef prev_is_word
  
  #undef ctype
  #undef length
  #undef max
  #undef min
  #undef number
  #undef offset
  #undef op
  #undef save_capture_last
  #undef save_offset1
  #undef save_offset2
  #undef save_offset3
  #undef stacksave
  
  #undef newptrb
  
  #endif
  
  /* These two are defined as macros in both cases */
  
  #undef fc
  #undef fi
  
  /***************************************************************************
  ***************************************************************************/
  
  
  #ifdef NO_RECURSE
  /*************************************************
  *          Release allocated heap frames         *
  *************************************************/
  
  /* This function releases all the allocated frames. The base frame is on the
  machine stack, and so must not be freed.
  
  Argument: the address of the base frame
  Returns:  nothing
  */
  
  static void
  release_match_heapframes (heapframe *frame_base)
  {
  heapframe *nextframe = frame_base->Xnextframe;
  while (nextframe != NULL)
    {
    heapframe *oldframe = nextframe;
    nextframe = nextframe->Xnextframe;
    (PUBL(stack_free))(oldframe);
    }
  }
  #endif
  
  
  /*************************************************
  *         Execute a Regular Expression           *
  *************************************************/
  
  /* This function applies a compiled re to a subject string and picks out
  portions of the string if it matches. Two elements in the vector are set for
  each substring: the offsets to the start and end of the substring.
  
  Arguments:
    argument_re     points to the compiled expression
    extra_data      points to extra data or is NULL
    subject         points to the subject string
    length          length of subject string (may contain binary zeros)
    start_offset    where to start in the subject string
    options         option bits
    offsets         points to a vector of ints to be filled in with offsets
    offsetcount     the number of elements in the vector
  
  Returns:          > 0 => success; value is the number of elements filled in
                    = 0 => success, but offsets is not big enough
                     -1 => failed to match
                   < -1 => some kind of unexpected problem
  */
  
  #ifdef COMPILE_PCRE8
  PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
  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)
  #else
  PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
  pcre16_exec(const pcre16 *argument_re, const pcre16_extra *extra_data,
    PCRE_SPTR16 subject, int length, int start_offset, int options, int *offsets,
    int offsetcount)
  #endif
  {
  int rc, ocount, arg_offset_max;
  int newline;
  BOOL using_temporary_offsets = FALSE;
  BOOL anchored;
  BOOL startline;
  BOOL firstline;
  BOOL utf;
  BOOL has_first_char = FALSE;
  BOOL has_req_char = FALSE;
  pcre_uchar first_char = 0;
  pcre_uchar first_char2 = 0;
  pcre_uchar req_char = 0;
  pcre_uchar req_char2 = 0;
  match_data match_block;
  match_data *md = &match_block;
  const pcre_uint8 *tables;
  const pcre_uint8 *start_bits = NULL;
  PCRE_PUCHAR start_match = (PCRE_PUCHAR)subject + start_offset;
  PCRE_PUCHAR end_subject;
  PCRE_PUCHAR start_partial = NULL;
  PCRE_PUCHAR req_char_ptr = start_match - 1;
  
  const pcre_study_data *study;
  const REAL_PCRE *re = (const REAL_PCRE *)argument_re;
  
  #ifdef NO_RECURSE
  heapframe frame_zero;
  frame_zero.Xprevframe = NULL;            /* Marks the top level */
  frame_zero.Xnextframe = NULL;            /* None are allocated yet */
  md->match_frames_base = &frame_zero;
  #endif
  
  /* Check for the special magic call that measures the size of the stack used
  per recursive call of match(). Without the funny casting for sizeof, a Windows
  compiler gave this error: "unary minus operator applied to unsigned type,
  result still unsigned". Hopefully the cast fixes that. */
  
  if (re == NULL && extra_data == NULL && subject == NULL && length == -999 &&
      start_offset == -999)
  #ifdef NO_RECURSE
    return -((int)sizeof(heapframe));
  #else
    return match(NULL, NULL, NULL, 0, NULL, NULL, 0);
  #endif
  
  /* Plausibility checks */
  
  if ((options & ~PUBLIC_EXEC_OPTIONS) != 0) return PCRE_ERROR_BADOPTION;
  if (re == NULL || subject == NULL || (offsets == NULL && offsetcount > 0))
    return PCRE_ERROR_NULL;
  if (offsetcount < 0) return PCRE_ERROR_BADCOUNT;
  if (start_offset < 0 || start_offset > length) return PCRE_ERROR_BADOFFSET;
  
  /* Check that the first field in the block is the magic number. If it is not,
  return with PCRE_ERROR_BADMAGIC. However, if the magic number is equal to
  REVERSED_MAGIC_NUMBER we return with PCRE_ERROR_BADENDIANNESS, which
  means that the pattern is likely compiled with different endianness. */
  
  if (re->magic_number != MAGIC_NUMBER)
    return re->magic_number == REVERSED_MAGIC_NUMBER?
      PCRE_ERROR_BADENDIANNESS:PCRE_ERROR_BADMAGIC;
  if ((re->flags & PCRE_MODE) == 0) return PCRE_ERROR_BADMODE;
  
  /* These two settings are used in the code for checking a UTF-8 string that
  follows immediately afterwards. Other values in the md block are used only
  during "normal" pcre_exec() processing, not when the JIT support is in use,
  so they are set up later. */
  
  /* PCRE_UTF16 has the same value as PCRE_UTF8. */
  utf = md->utf = (re->options & PCRE_UTF8) != 0;
  md->partial = ((options & PCRE_PARTIAL_HARD) != 0)? 2 :
                ((options & PCRE_PARTIAL_SOFT) != 0)? 1 : 0;
  
  /* Check a UTF-8 string if required. Pass back the character offset and error
  code for an invalid string if a results vector is available. */
  
  #ifdef SUPPORT_UTF
  if (utf && (options & PCRE_NO_UTF8_CHECK) == 0)
    {
    int erroroffset;
    int errorcode = PRIV(valid_utf)((PCRE_PUCHAR)subject, length, &erroroffset);
    if (errorcode != 0)
      {
      if (offsetcount >= 2)
        {
        offsets[0] = erroroffset;
        offsets[1] = errorcode;
        }
  #ifdef COMPILE_PCRE16
      return (errorcode <= PCRE_UTF16_ERR1 && md->partial > 1)?
        PCRE_ERROR_SHORTUTF16 : PCRE_ERROR_BADUTF16;
  #else
      return (errorcode <= PCRE_UTF8_ERR5 && md->partial > 1)?
        PCRE_ERROR_SHORTUTF8 : PCRE_ERROR_BADUTF8;
  #endif
      }
  
    /* Check that a start_offset points to the start of a UTF character. */
    if (start_offset > 0 && start_offset < length &&
        NOT_FIRSTCHAR(((PCRE_PUCHAR)subject)[start_offset]))
      return PCRE_ERROR_BADUTF8_OFFSET;
    }
  #endif
  
  /* If the pattern was successfully studied with JIT support, run the JIT
  executable instead of the rest of this function. Most options must be set at
  compile time for the JIT code to be usable. Fallback to the normal code path if
  an unsupported flag is set. */
  
  #ifdef SUPPORT_JIT
  if (extra_data != NULL
      && (extra_data->flags & (PCRE_EXTRA_EXECUTABLE_JIT |
                               PCRE_EXTRA_TABLES)) == PCRE_EXTRA_EXECUTABLE_JIT
      && extra_data->executable_jit != NULL
      && (options & ~(PCRE_NO_UTF8_CHECK | PCRE_NOTBOL | PCRE_NOTEOL |
                      PCRE_NOTEMPTY | PCRE_NOTEMPTY_ATSTART |
                      PCRE_PARTIAL_SOFT | PCRE_PARTIAL_HARD)) == 0)
    {
    rc = PRIV(jit_exec)(re, extra_data, (const pcre_uchar *)subject, length,
         start_offset, options, offsets, offsetcount);
  
    /* PCRE_ERROR_NULL means that the selected normal or partial matching
    mode is not compiled. In this case we simply fallback to interpreter. */
  
    if (rc != PCRE_ERROR_NULL) return rc;
    }
  #endif
  
  /* Carry on with non-JIT matching. This information is for finding all the
  numbers associated with a given name, for condition testing. */
  
  md->name_table = (pcre_uchar *)re + re->name_table_offset;
  md->name_count = re->name_count;
  md->name_entry_size = re->name_entry_size;
  
  /* Fish out the optional data from the extra_data structure, first setting
  the default values. */
  
  study = NULL;
  md->match_limit = MATCH_LIMIT;
  md->match_limit_recursion = MATCH_LIMIT_RECURSION;
  md->callout_data = NULL;
  
  /* The table pointer is always in native byte order. */
  
  tables = re->tables;
  
  if (extra_data != NULL)
    {
    register unsigned int flags = extra_data->flags;
    if ((flags & PCRE_EXTRA_STUDY_DATA) != 0)
      study = (const pcre_study_data *)extra_data->study_data;
    if ((flags & PCRE_EXTRA_MATCH_LIMIT) != 0)
      md->match_limit = extra_data->match_limit;
    if ((flags & PCRE_EXTRA_MATCH_LIMIT_RECURSION) != 0)
      md->match_limit_recursion = extra_data->match_limit_recursion;
    if ((flags & PCRE_EXTRA_CALLOUT_DATA) != 0)
      md->callout_data = extra_data->callout_data;
    if ((flags & PCRE_EXTRA_TABLES) != 0) tables = extra_data->tables;
    }
  
  /* If the exec call supplied NULL for tables, use the inbuilt ones. This
  is a feature that makes it possible to save compiled regex and re-use them
  in other programs later. */
  
  if (tables == NULL) tables = PRIV(default_tables);
  
  /* Set up other data */
  
  anchored = ((re->options | options) & PCRE_ANCHORED) != 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. */
  
  md->start_code = (const pcre_uchar *)re + re->name_table_offset +
    re->name_count * re->name_entry_size;
  
  md->start_subject = (PCRE_PUCHAR)subject;
  md->start_offset = start_offset;
  md->end_subject = md->start_subject + length;
  end_subject = md->end_subject;
  
  md->endonly = (re->options & PCRE_DOLLAR_ENDONLY) != 0;
  md->use_ucp = (re->options & PCRE_UCP) != 0;
  md->jscript_compat = (re->options & PCRE_JAVASCRIPT_COMPAT) != 0;
  md->ignore_skip_arg = FALSE;
  
  /* Some options are unpacked into BOOL variables in the hope that testing
  them will be faster than individual option bits. */
  
  md->notbol = (options & PCRE_NOTBOL) != 0;
  md->noteol = (options & PCRE_NOTEOL) != 0;
  md->notempty = (options & PCRE_NOTEMPTY) != 0;
  md->notempty_atstart = (options & PCRE_NOTEMPTY_ATSTART) != 0;
  
  md->hitend = FALSE;
  md->mark = md->nomatch_mark = NULL;     /* In case never set */
  
  md->recursive = NULL;                   /* No recursion at top level */
  md->hasthen = (re->flags & PCRE_HASTHEN) != 0;
  
  md->lcc = tables + lcc_offset;
  md->fcc = tables + fcc_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. */
  
  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 = CHAR_CR; break;
    case PCRE_NEWLINE_LF: newline = CHAR_NL; break;
    case PCRE_NEWLINE_CR+
         PCRE_NEWLINE_LF: newline = (CHAR_CR << 8) | CHAR_NL; break;
    case PCRE_NEWLINE_ANY: newline = -1; break;
    case PCRE_NEWLINE_ANYCRLF: newline = -2; break;
    default: return PCRE_ERROR_BADNEWLINE;
    }
  
  if (newline == -2)
    {
    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 was originally supported only for a restricted set of
  regexes; from release 8.00 there are no restrictions, but the bits are still
  defined (though never set). So there's no harm in leaving this code. */
  
  if (md->partial && (re->flags & PCRE_NOPARTIAL) != 0)
    return PCRE_ERROR_BADPARTIAL;
  
  /* If the expression has got more back references than the offsets supplied can
  hold, we get a temporary chunk of working store to use during the matching.
  Otherwise, we can use the vector supplied, rounding down its size to a multiple
  of 3. */
  
  ocount = offsetcount - (offsetcount % 3);
  arg_offset_max = (2*ocount)/3;
  
  if (re->top_backref > 0 && re->top_backref >= ocount/3)
    {
    ocount = re->top_backref * 3 + 3;
    md->offset_vector = (int *)(PUBL(malloc))(ocount * sizeof(int));
    if (md->offset_vector == NULL) return PCRE_ERROR_NOMEMORY;
    using_temporary_offsets = TRUE;
    DPRINTF(("Got memory to hold back references\n"));
    }
  else md->offset_vector = offsets;
  
  md->offset_end = ocount;
  md->offset_max = (2*ocount)/3;
  md->offset_overflow = FALSE;
  md->capture_last = -1;
  
  /* Reset the working variable associated with each extraction. These should
  never be used unless previously set, but they get saved and restored, and so we
  initialize them to avoid reading uninitialized locations. Also, unset the
  offsets for the matched string. This is really just for tidiness with callouts,
  in case they inspect these fields. */
  
  if (md->offset_vector != NULL)
    {
    register int *iptr = md->offset_vector + ocount;
    register int *iend = iptr - re->top_bracket;
    if (iend < md->offset_vector + 2) iend = md->offset_vector + 2;
    while (--iptr >= iend) *iptr = -1;
    md->offset_vector[0] = md->offset_vector[1] = -1;
    }
  
  /* Set up the first character to match, if available. The first_char value is
  never set for an anchored regular expression, but the anchoring may be forced
  at run time, so we have to test for anchoring. The first char may be unset for
  an unanchored pattern, of course. If there's no first char and the pattern was
  studied, there may be a bitmap of possible first characters. */
  
  if (!anchored)
    {
    if ((re->flags & PCRE_FIRSTSET) != 0)
      {
      has_first_char = TRUE;
      first_char = first_char2 = (pcre_uchar)(re->first_char);
      if ((re->flags & PCRE_FCH_CASELESS) != 0)
        {
        first_char2 = TABLE_GET(first_char, md->fcc, first_char);
  #if defined SUPPORT_UCP && !(defined COMPILE_PCRE8)
        if (utf && first_char > 127)
          first_char2 = UCD_OTHERCASE(first_char);
  #endif
        }
      }
    else
      if (!startline && study != NULL &&
        (study->flags & PCRE_STUDY_MAPPED) != 0)
          start_bits = study->start_bits;
    }
  
  /* For anchored or unanchored matches, there may be a "last known required
  character" set. */
  
  if ((re->flags & PCRE_REQCHSET) != 0)
    {
    has_req_char = TRUE;
    req_char = req_char2 = (pcre_uchar)(re->req_char);
    if ((re->flags & PCRE_RCH_CASELESS) != 0)
      {
      req_char2 = TABLE_GET(req_char, md->fcc, req_char);
  #if defined SUPPORT_UCP && !(defined COMPILE_PCRE8)
      if (utf && req_char > 127)
        req_char2 = UCD_OTHERCASE(req_char);
  #endif
      }
    }
  
  
  /* ==========================================================================*/
  
  /* Loop for handling unanchored repeated matching attempts; for anchored regexs
  the loop runs just once. */
  
  for(;;)
    {
    PCRE_PUCHAR save_end_subject = end_subject;
    PCRE_PUCHAR new_start_match;
  
    /* If firstline is TRUE, the start of the match is constrained to the first
    line of a multiline string. That is, the match must be before or at the first
    newline. Implement this by 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)
      {
      PCRE_PUCHAR t = start_match;
  #ifdef SUPPORT_UTF
      if (utf)
        {
        while (t < md->end_subject && !IS_NEWLINE(t))
          {
          t++;
          ACROSSCHAR(t < end_subject, *t, t++);
          }
        }
      else
  #endif
      while (t < md->end_subject && !IS_NEWLINE(t)) t++;
      end_subject = t;
      }
  
    /* There are some optimizations that avoid running the match if a known
    starting point is not found, or if a known later character is not present.
    However, there is an option that disables these, for testing and for ensuring
    that all callouts do actually occur. The option can be set in the regex by
    (*NO_START_OPT) or passed in match-time options. */
  
    if (((options | re->options) & PCRE_NO_START_OPTIMIZE) == 0)
      {
      /* Advance to a unique first char if there is one. */
  
      if (has_first_char)
        {
        if (first_char != first_char2)
          while (start_match < end_subject &&
              *start_match != first_char && *start_match != first_char2)
            start_match++;
        else
          while (start_match < end_subject && *start_match != first_char)
            start_match++;
        }
  
      /* Or to just after a linebreak for a multiline match */
  
      else if (startline)
        {
        if (start_match > md->start_subject + start_offset)
          {
  #ifdef SUPPORT_UTF
          if (utf)
            {
            while (start_match < end_subject && !WAS_NEWLINE(start_match))
              {
              start_match++;
              ACROSSCHAR(start_match < end_subject, *start_match,
                start_match++);
              }
            }
          else
  #endif
          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] == CHAR_CR &&
               (md->nltype == NLTYPE_ANY || md->nltype == NLTYPE_ANYCRLF) &&
               start_match < end_subject &&
               *start_match == CHAR_NL)
            start_match++;
          }
        }
  
      /* Or to a non-unique first byte after study */
  
      else if (start_bits != NULL)
        {
        while (start_match < end_subject)
          {
          register unsigned int c = *start_match;
  #ifndef COMPILE_PCRE8
          if (c > 255) c = 255;
  #endif
          if ((start_bits[c/8] & (1 << (c&7))) == 0)
            {
            start_match++;
  #if defined SUPPORT_UTF && defined COMPILE_PCRE8
            /* In non 8-bit mode, the iteration will stop for
            characters > 255 at the beginning or not stop at all. */
            if (utf)
              ACROSSCHAR(start_match < end_subject, *start_match,
                start_match++);
  #endif
            }
          else break;
          }
        }
      }   /* Starting optimizations */
  
    /* Restore fudged end_subject */
  
    end_subject = save_end_subject;
  
    /* The following two optimizations are disabled for partial matching or if
    disabling is explicitly requested. */
  
    if (((options | re->options) & PCRE_NO_START_OPTIMIZE) == 0 && !md->partial)
      {
      /* If the pattern was studied, a minimum subject length may be set. This is
      a lower bound; no actual string of that length may actually match the
      pattern. Although the value is, strictly, in characters, we treat it as
      bytes to avoid spending too much time in this optimization. */
  
      if (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0 &&
          (pcre_uint32)(end_subject - start_match) < study->minlength)
        {
        rc = MATCH_NOMATCH;
        break;
        }
  
      /* If req_char is set, we know that that character must appear in the
      subject for the match to succeed. If the first character is set, req_char
      must be later in the subject; otherwise the test starts at the match point.
      This optimization can save a huge amount of backtracking in patterns with
      nested unlimited repeats that aren't going to match. Writing separate code
      for cased/caseless versions makes it go faster, as does using an
      autoincrement and backing off on a match.
  
      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 something like /^\d+C/ on a
      32-megabyte string... so we don't do this when the string is sufficiently
      long. */
  
      if (has_req_char && end_subject - start_match < REQ_BYTE_MAX)
        {
        register PCRE_PUCHAR p = start_match + (has_first_char? 1:0);
  
        /* We don't need to repeat the search if we haven't yet reached the
        place we found it at last time. */
  
        if (p > req_char_ptr)
          {
          if (req_char != req_char2)
            {
            while (p < end_subject)
              {
              register int pp = *p++;
              if (pp == req_char || pp == req_char2) { p--; break; }
              }
            }
          else
            {
            while (p < end_subject)
              {
              if (*p++ == req_char) { p--; break; }
              }
            }
  
          /* If we can't find the required character, break the matching loop,
          forcing a match failure. */
  
          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
          the start hasn't passed this character yet. */
  
          req_char_ptr = p;
          }
        }
      }
  
  #ifdef PCRE_DEBUG  /* Sigh. Some compilers never learn. */
    printf(">>>> Match against: ");
    pchars(start_match, end_subject - start_match, TRUE, md);
    printf("\n");
  #endif
  
    /* OK, we can now run the match. If "hitend" is set afterwards, remember the
    first starting point for which a partial match was found. */
  
    md->start_match_ptr = start_match;
    md->start_used_ptr = start_match;
    md->match_call_count = 0;
    md->match_function_type = 0;
    md->end_offset_top = 0;
    rc = match(start_match, md->start_code, start_match, 2, md, NULL, 0);
    if (md->hitend && start_partial == NULL) start_partial = md->start_used_ptr;
  
    switch(rc)
      {
      /* If MATCH_SKIP_ARG reaches this level it means that a MARK that matched
      the SKIP's arg was not found. In this circumstance, Perl ignores the SKIP
      entirely. The only way we can do that is to re-do the match at the same
      point, with a flag to force SKIP with an argument to be ignored. Just
      treating this case as NOMATCH does not work because it does not check other
      alternatives in patterns such as A(*SKIP:A)B|AC when the subject is AC. */
  
      case MATCH_SKIP_ARG:
      new_start_match = start_match;
      md->ignore_skip_arg = TRUE;
      break;
  
      /* SKIP passes back the next starting point explicitly, but if it is the
      same as the match we have just done, treat it as NOMATCH. */
  
      case MATCH_SKIP:
      if (md->start_match_ptr != start_match)
        {
        new_start_match = md->start_match_ptr;
        break;
        }
      /* Fall through */
  
      /* NOMATCH and PRUNE advance by one character. THEN at this level acts
      exactly like PRUNE. Unset the ignore SKIP-with-argument flag. */
  
      case MATCH_NOMATCH:
      case MATCH_PRUNE:
      case MATCH_THEN:
      md->ignore_skip_arg = FALSE;
      new_start_match = start_match + 1;
  #ifdef SUPPORT_UTF
      if (utf)
        ACROSSCHAR(new_start_match < end_subject, *new_start_match,
          new_start_match++);
  #endif
      break;
  
      /* COMMIT disables the bumpalong, but otherwise behaves as NOMATCH. */
  
      case MATCH_COMMIT:
      rc = MATCH_NOMATCH;
      goto ENDLOOP;
  
      /* Any other return is either a match, or some kind of error. */
  
      default:
      goto ENDLOOP;
      }
  
    /* Control reaches here for the various types of "no match at this point"
    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. In
    normal matching start_match will aways be greater than the first position at
    this stage, but a failed *SKIP can cause a return at the same point, which is
    why the first test exists. */
  
    if (start_match > (PCRE_PUCHAR)subject + start_offset &&
        start_match[-1] == CHAR_CR &&
        start_match < end_subject &&
        *start_match == CHAR_NL &&
        (re->flags & PCRE_HASCRORLF) == 0 &&
          (md->nltype == NLTYPE_ANY ||
           md->nltype == NLTYPE_ANYCRLF ||
           md->nllen == 2))
      start_match++;
  
    md->mark = NULL;   /* Reset for start of next match attempt */
    }                  /* 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 || rc == MATCH_ACCEPT)
    {
    if (using_temporary_offsets)
      {
      if (arg_offset_max >= 4)
        {
        memcpy(offsets + 2, md->offset_vector + 2,
          (arg_offset_max - 2) * sizeof(int));
        DPRINTF(("Copied offsets from temporary memory\n"));
        }
      if (md->end_offset_top > arg_offset_max) md->offset_overflow = TRUE;
      DPRINTF(("Freeing temporary memory\n"));
      (PUBL(free))(md->offset_vector);
      }
  
    /* Set the return code to the number of captured strings, or 0 if there were
    too many to fit into the vector. */
  
    rc = (md->offset_overflow && md->end_offset_top >= arg_offset_max)?
      0 : md->end_offset_top/2;
  
    /* If there is space in the offset vector, set any unused pairs at the end of
    the pattern to -1 for backwards compatibility. It is documented that this
    happens. In earlier versions, the whole set of potential capturing offsets
    was set to -1 each time round the loop, but this is handled differently now.
    "Gaps" are set to -1 dynamically instead (this fixes a bug). Thus, it is only
    those at the end that need unsetting here. We can't just unset them all at
    the start of the whole thing because they may get set in one branch that is
    not the final matching branch. */
  
    if (md->end_offset_top/2 <= re->top_bracket && offsets != NULL)
      {
      register int *iptr, *iend;
      int resetcount = 2 + re->top_bracket * 2;
      if (resetcount > offsetcount) resetcount = offsetcount;
      iptr = offsets + md->end_offset_top;
      iend = offsets + resetcount;
      while (iptr < iend) *iptr++ = -1;
      }
  
    /* 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] = (int)(md->start_match_ptr - md->start_subject);
      offsets[1] = (int)(md->end_match_ptr - md->start_subject);
      }
  
    /* Return MARK data if requested */
  
    if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_MARK) != 0)
      *(extra_data->mark) = (pcre_uchar *)md->mark;
    DPRINTF((">>>> returning %d\n", rc));
  #ifdef NO_RECURSE
    release_match_heapframes(&frame_zero);
  #endif
    return rc;
    }
  
  /* Control gets here if there has been an error, or if the overall match
  attempt has failed at all permitted starting positions. */
  
  if (using_temporary_offsets)
    {
    DPRINTF(("Freeing temporary memory\n"));
    (PUBL(free))(md->offset_vector);
    }
  
  /* For anything other than nomatch or partial match, just return the code. */
  
  if (rc != MATCH_NOMATCH && rc != PCRE_ERROR_PARTIAL)
    {
    DPRINTF((">>>> error: returning %d\n", rc));
  #ifdef NO_RECURSE
    release_match_heapframes(&frame_zero);
  #endif
    return rc;
    }
  
  /* Handle partial matches - disable any mark data */
  
  if (start_partial != NULL)
    {
    DPRINTF((">>>> returning PCRE_ERROR_PARTIAL\n"));
    md->mark = NULL;
    if (offsetcount > 1)
      {
      offsets[0] = (int)(start_partial - (PCRE_PUCHAR)subject);
      offsets[1] = (int)(end_subject - (PCRE_PUCHAR)subject);
      }
    rc = PCRE_ERROR_PARTIAL;
    }
  
  /* This is the classic nomatch case */
  
  else
    {
    DPRINTF((">>>> returning PCRE_ERROR_NOMATCH\n"));
    rc = PCRE_ERROR_NOMATCH;
    }
  
  /* Return the MARK data if it has been requested. */
  
  if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_MARK) != 0)
    *(extra_data->mark) = (pcre_uchar *)md->nomatch_mark;
  #ifdef NO_RECURSE
    release_match_heapframes(&frame_zero);
  #endif
  return rc;
  }
  
  /* End of pcre_exec.c */
  