/[pcre]/code/trunk/pcre_compile.c
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revision 461 by ph10, Mon Oct 5 10:59:35 2009 UTC revision 505 by ph10, Tue Mar 9 16:50:47 2010 UTC
# Line 6  Line 6 
6  and semantics are as close as possible to those of the Perl 5 language.  and semantics are as close as possible to those of the Perl 5 language.
7    
8                         Written by Philip Hazel                         Written by Philip Hazel
9             Copyright (c) 1997-2009 University of Cambridge             Copyright (c) 1997-2010 University of Cambridge
10    
11  -----------------------------------------------------------------------------  -----------------------------------------------------------------------------
12  Redistribution and use in source and binary forms, with or without  Redistribution and use in source and binary forms, with or without
# Line 53  supporting internal functions that are n Line 53  supporting internal functions that are n
53  #include "pcre_internal.h"  #include "pcre_internal.h"
54    
55    
56  /* When DEBUG is defined, we need the pcre_printint() function, which is also  /* When PCRE_DEBUG is defined, we need the pcre_printint() function, which is
57  used by pcretest. DEBUG is not defined when building a production library. */  also used by pcretest. PCRE_DEBUG is not defined when building a production
58    library. */
59    
60  #ifdef DEBUG  #ifdef PCRE_DEBUG
61  #include "pcre_printint.src"  #include "pcre_printint.src"
62  #endif  #endif
63    
# Line 91  is 4 there is plenty of room. */ Line 92  is 4 there is plenty of room. */
92    
93  #define COMPILE_WORK_SIZE (4096)  #define COMPILE_WORK_SIZE (4096)
94    
95    /* The overrun tests check for a slightly smaller size so that they detect the
96    overrun before it actually does run off the end of the data block. */
97    
98    #define WORK_SIZE_CHECK (COMPILE_WORK_SIZE - 100)
99    
100    
101  /* Table for handling escaped characters in the range '0'-'z'. Positive returns  /* Table for handling escaped characters in the range '0'-'z'. Positive returns
102  are simple data values; negative values are for special things like \d and so  are simple data values; negative values are for special things like \d and so
# Line 262  the number of relocations needed when a Line 268  the number of relocations needed when a
268  it is now one long string. We cannot use a table of offsets, because the  it is now one long string. We cannot use a table of offsets, because the
269  lengths of inserts such as XSTRING(MAX_NAME_SIZE) are not known. Instead, we  lengths of inserts such as XSTRING(MAX_NAME_SIZE) are not known. Instead, we
270  simply count through to the one we want - this isn't a performance issue  simply count through to the one we want - this isn't a performance issue
271  because these strings are used only when there is a compilation error. */  because these strings are used only when there is a compilation error.
272    
273    Each substring ends with \0 to insert a null character. This includes the final
274    substring, so that the whole string ends with \0\0, which can be detected when
275    counting through. */
276    
277  static const char error_texts[] =  static const char error_texts[] =
278    "no error\0"    "no error\0"
# Line 343  static const char error_texts[] = Line 353  static const char error_texts[] =
353    "digit expected after (?+\0"    "digit expected after (?+\0"
354    "] is an invalid data character in JavaScript compatibility mode\0"    "] is an invalid data character in JavaScript compatibility mode\0"
355    /* 65 */    /* 65 */
356    "different names for subpatterns of the same number are not allowed";    "different names for subpatterns of the same number are not allowed\0";
   
357    
358  /* Table to identify digits and hex digits. This is used when compiling  /* Table to identify digits and hex digits. This is used when compiling
359  patterns. Note that the tables in chartables are dependent on the locale, and  patterns. Note that the tables in chartables are dependent on the locale, and
# Line 502  static const char * Line 511  static const char *
511  find_error_text(int n)  find_error_text(int n)
512  {  {
513  const char *s = error_texts;  const char *s = error_texts;
514  for (; n > 0; n--) while (*s++ != 0) {};  for (; n > 0; n--)
515      {
516      while (*s++ != 0) {};
517      if (*s == 0) return "Error text not found (please report)";
518      }
519  return s;  return s;
520  }  }
521    
# Line 1442  for (;;) Line 1455  for (;;)
1455      case OP_CALLOUT:      case OP_CALLOUT:
1456      case OP_SOD:      case OP_SOD:
1457      case OP_SOM:      case OP_SOM:
1458        case OP_SET_SOM:
1459      case OP_EOD:      case OP_EOD:
1460      case OP_EODN:      case OP_EODN:
1461      case OP_CIRC:      case OP_CIRC:
# Line 1776  Arguments: Line 1790  Arguments:
1790    code        points to start of search    code        points to start of search
1791    endcode     points to where to stop    endcode     points to where to stop
1792    utf8        TRUE if in UTF8 mode    utf8        TRUE if in UTF8 mode
1793      cd          contains pointers to tables etc.
1794    
1795  Returns:      TRUE if what is matched could be empty  Returns:      TRUE if what is matched could be empty
1796  */  */
1797    
1798  static BOOL  static BOOL
1799  could_be_empty_branch(const uschar *code, const uschar *endcode, BOOL utf8)  could_be_empty_branch(const uschar *code, const uschar *endcode, BOOL utf8,
1800      compile_data *cd)
1801  {  {
1802  register int c;  register int c;
1803  for (code = first_significant_code(code + _pcre_OP_lengths[*code], NULL, 0, TRUE);  for (code = first_significant_code(code + _pcre_OP_lengths[*code], NULL, 0, TRUE);
# Line 1791  for (code = first_significant_code(code Line 1807  for (code = first_significant_code(code
1807    const uschar *ccode;    const uschar *ccode;
1808    
1809    c = *code;    c = *code;
1810    
1811    /* Skip over forward assertions; the other assertions are skipped by    /* Skip over forward assertions; the other assertions are skipped by
1812    first_significant_code() with a TRUE final argument. */    first_significant_code() with a TRUE final argument. */
1813    
# Line 1811  for (code = first_significant_code(code Line 1827  for (code = first_significant_code(code
1827      c = *code;      c = *code;
1828      continue;      continue;
1829      }      }
1830    
1831      /* For a recursion/subroutine call, if its end has been reached, which
1832      implies a subroutine call, we can scan it. */
1833    
1834      if (c == OP_RECURSE)
1835        {
1836        BOOL empty_branch = FALSE;
1837        const uschar *scode = cd->start_code + GET(code, 1);
1838        if (GET(scode, 1) == 0) return TRUE;    /* Unclosed */
1839        do
1840          {
1841          if (could_be_empty_branch(scode, endcode, utf8, cd))
1842            {
1843            empty_branch = TRUE;
1844            break;
1845            }
1846          scode += GET(scode, 1);
1847          }
1848        while (*scode == OP_ALT);
1849        if (!empty_branch) return FALSE;  /* All branches are non-empty */
1850        continue;
1851        }
1852    
1853    /* For other groups, scan the branches. */    /* For other groups, scan the branches. */
1854    
# Line 1830  for (code = first_significant_code(code Line 1868  for (code = first_significant_code(code
1868        empty_branch = FALSE;        empty_branch = FALSE;
1869        do        do
1870          {          {
1871          if (!empty_branch && could_be_empty_branch(code, endcode, utf8))          if (!empty_branch && could_be_empty_branch(code, endcode, utf8, cd))
1872            empty_branch = TRUE;            empty_branch = TRUE;
1873          code += GET(code, 1);          code += GET(code, 1);
1874          }          }
# Line 1964  for (code = first_significant_code(code Line 2002  for (code = first_significant_code(code
2002      if (utf8 && code[3] >= 0xc0) code += _pcre_utf8_table4[code[3] & 0x3f];      if (utf8 && code[3] >= 0xc0) code += _pcre_utf8_table4[code[3] & 0x3f];
2003      break;      break;
2004  #endif  #endif
2005    
2006        /* None of the remaining opcodes are required to match a character. */
2007    
2008        default:
2009        break;
2010      }      }
2011    }    }
2012    
# Line 1986  Arguments: Line 2029  Arguments:
2029    endcode     points to where to stop (current RECURSE item)    endcode     points to where to stop (current RECURSE item)
2030    bcptr       points to the chain of current (unclosed) branch starts    bcptr       points to the chain of current (unclosed) branch starts
2031    utf8        TRUE if in UTF-8 mode    utf8        TRUE if in UTF-8 mode
2032      cd          pointers to tables etc
2033    
2034  Returns:      TRUE if what is matched could be empty  Returns:      TRUE if what is matched could be empty
2035  */  */
2036    
2037  static BOOL  static BOOL
2038  could_be_empty(const uschar *code, const uschar *endcode, branch_chain *bcptr,  could_be_empty(const uschar *code, const uschar *endcode, branch_chain *bcptr,
2039    BOOL utf8)    BOOL utf8, compile_data *cd)
2040  {  {
2041  while (bcptr != NULL && bcptr->current >= code)  while (bcptr != NULL && bcptr->current_branch >= code)
2042    {    {
2043    if (!could_be_empty_branch(bcptr->current, endcode, utf8)) return FALSE;    if (!could_be_empty_branch(bcptr->current_branch, endcode, utf8, cd))
2044        return FALSE;
2045    bcptr = bcptr->outer;    bcptr = bcptr->outer;
2046    }    }
2047  return TRUE;  return TRUE;
# Line 2658  BOOL utf8 = FALSE; Line 2703  BOOL utf8 = FALSE;
2703  uschar *utf8_char = NULL;  uschar *utf8_char = NULL;
2704  #endif  #endif
2705    
2706  #ifdef DEBUG  #ifdef PCRE_DEBUG
2707  if (lengthptr != NULL) DPRINTF((">> start branch\n"));  if (lengthptr != NULL) DPRINTF((">> start branch\n"));
2708  #endif  #endif
2709    
# Line 2717  for (;; ptr++) Line 2762  for (;; ptr++)
2762    
2763    if (lengthptr != NULL)    if (lengthptr != NULL)
2764      {      {
2765  #ifdef DEBUG  #ifdef PCRE_DEBUG
2766      if (code > cd->hwm) cd->hwm = code;                 /* High water info */      if (code > cd->hwm) cd->hwm = code;                 /* High water info */
2767  #endif  #endif
2768      if (code > cd->start_workspace + COMPILE_WORK_SIZE) /* Check for overrun */      if (code > cd->start_workspace + WORK_SIZE_CHECK)   /* Check for overrun */
2769        {        {
2770        *errorcodeptr = ERR52;        *errorcodeptr = ERR52;
2771        goto FAILED;        goto FAILED;
# Line 2769  for (;; ptr++) Line 2814  for (;; ptr++)
2814    /* In the real compile phase, just check the workspace used by the forward    /* In the real compile phase, just check the workspace used by the forward
2815    reference list. */    reference list. */
2816    
2817    else if (cd->hwm > cd->start_workspace + COMPILE_WORK_SIZE)    else if (cd->hwm > cd->start_workspace + WORK_SIZE_CHECK)
2818      {      {
2819      *errorcodeptr = ERR52;      *errorcodeptr = ERR52;
2820      goto FAILED;      goto FAILED;
# Line 4213  we set the flag only if there is a liter Line 4258  we set the flag only if there is a liter
4258            {            {
4259            /* In the pre-compile phase, we don't actually do the replication. We            /* In the pre-compile phase, we don't actually do the replication. We
4260            just adjust the length as if we had. Do some paranoid checks for            just adjust the length as if we had. Do some paranoid checks for
4261            potential integer overflow. */            potential integer overflow. The INT64_OR_DOUBLE type is a 64-bit
4262              integer type when available, otherwise double. */
4263    
4264            if (lengthptr != NULL)            if (lengthptr != NULL)
4265              {              {
4266              int delta = (repeat_min - 1)*length_prevgroup;              int delta = (repeat_min - 1)*length_prevgroup;
4267              if ((double)(repeat_min - 1)*(double)length_prevgroup >              if ((INT64_OR_DOUBLE)(repeat_min - 1)*
4268                                                              (double)INT_MAX ||                    (INT64_OR_DOUBLE)length_prevgroup >
4269                        (INT64_OR_DOUBLE)INT_MAX ||
4270                  OFLOW_MAX - *lengthptr < delta)                  OFLOW_MAX - *lengthptr < delta)
4271                {                {
4272                *errorcodeptr = ERR20;                *errorcodeptr = ERR20;
# Line 4265  we set the flag only if there is a liter Line 4312  we set the flag only if there is a liter
4312          just adjust the length as if we had. For each repetition we must add 1          just adjust the length as if we had. For each repetition we must add 1
4313          to the length for BRAZERO and for all but the last repetition we must          to the length for BRAZERO and for all but the last repetition we must
4314          add 2 + 2*LINKSIZE to allow for the nesting that occurs. Do some          add 2 + 2*LINKSIZE to allow for the nesting that occurs. Do some
4315          paranoid checks to avoid integer overflow. */          paranoid checks to avoid integer overflow. The INT64_OR_DOUBLE type is
4316            a 64-bit integer type when available, otherwise double. */
4317    
4318          if (lengthptr != NULL && repeat_max > 0)          if (lengthptr != NULL && repeat_max > 0)
4319            {            {
4320            int delta = repeat_max * (length_prevgroup + 1 + 2 + 2*LINK_SIZE) -            int delta = repeat_max * (length_prevgroup + 1 + 2 + 2*LINK_SIZE) -
4321                        2 - 2*LINK_SIZE;   /* Last one doesn't nest */                        2 - 2*LINK_SIZE;   /* Last one doesn't nest */
4322            if ((double)repeat_max *            if ((INT64_OR_DOUBLE)repeat_max *
4323                  (double)(length_prevgroup + 1 + 2 + 2*LINK_SIZE)                  (INT64_OR_DOUBLE)(length_prevgroup + 1 + 2 + 2*LINK_SIZE)
4324                    > (double)INT_MAX ||                    > (INT64_OR_DOUBLE)INT_MAX ||
4325                OFLOW_MAX - *lengthptr < delta)                OFLOW_MAX - *lengthptr < delta)
4326              {              {
4327              *errorcodeptr = ERR20;              *errorcodeptr = ERR20;
# Line 4350  we set the flag only if there is a liter Line 4398  we set the flag only if there is a liter
4398            uschar *scode = bracode;            uschar *scode = bracode;
4399            do            do
4400              {              {
4401              if (could_be_empty_branch(scode, ketcode, utf8))              if (could_be_empty_branch(scode, ketcode, utf8, cd))
4402                {                {
4403                *bracode += OP_SBRA - OP_BRA;                *bracode += OP_SBRA - OP_BRA;
4404                break;                break;
# Line 4425  we set the flag only if there is a liter Line 4473  we set the flag only if there is a liter
4473          case OP_NOTQUERY: *tempcode = OP_NOTPOSQUERY; break;          case OP_NOTQUERY: *tempcode = OP_NOTPOSQUERY; break;
4474          case OP_NOTUPTO:  *tempcode = OP_NOTPOSUPTO; break;          case OP_NOTUPTO:  *tempcode = OP_NOTPOSUPTO; break;
4475    
4476            /* Because we are moving code along, we must ensure that any
4477            pending recursive references are updated. */
4478    
4479          default:          default:
4480            *code = OP_END;
4481            adjust_recurse(tempcode, 1 + LINK_SIZE, utf8, cd, save_hwm);
4482          memmove(tempcode + 1+LINK_SIZE, tempcode, len);          memmove(tempcode + 1+LINK_SIZE, tempcode, len);
4483          code += 1 + LINK_SIZE;          code += 1 + LINK_SIZE;
4484          len += 1 + LINK_SIZE;          len += 1 + LINK_SIZE;
# Line 5144  we set the flag only if there is a liter Line 5197  we set the flag only if there is a liter
5197                  *errorcodeptr = ERR15;                  *errorcodeptr = ERR15;
5198                  goto FAILED;                  goto FAILED;
5199                  }                  }
5200    
5201                  /* Fudge the value of "called" so that when it is inserted as an
5202                  offset below, what it actually inserted is the reference number
5203                  of the group. */
5204    
5205                called = cd->start_code + recno;                called = cd->start_code + recno;
5206                PUTINC(cd->hwm, 0, code + 2 + LINK_SIZE - cd->start_code);                PUTINC(cd->hwm, 0, code + 2 + LINK_SIZE - cd->start_code);
5207                }                }
# Line 5153  we set the flag only if there is a liter Line 5211  we set the flag only if there is a liter
5211              recursion that could loop for ever, and diagnose that case. */              recursion that could loop for ever, and diagnose that case. */
5212    
5213              else if (GET(called, 1) == 0 &&              else if (GET(called, 1) == 0 &&
5214                       could_be_empty(called, code, bcptr, utf8))                       could_be_empty(called, code, bcptr, utf8, cd))
5215                {                {
5216                *errorcodeptr = ERR40;                *errorcodeptr = ERR40;
5217                goto FAILED;                goto FAILED;
# Line 5248  we set the flag only if there is a liter Line 5306  we set the flag only if there is a liter
5306              {              {
5307              cd->external_options = newoptions;              cd->external_options = newoptions;
5308              }              }
5309           else            else
5310              {              {
5311              if ((options & PCRE_IMS) != (newoptions & PCRE_IMS))              if ((options & PCRE_IMS) != (newoptions & PCRE_IMS))
5312                {                {
# Line 5585  we set the flag only if there is a liter Line 5643  we set the flag only if there is a liter
5643    
5644        if (-c >= ESC_REF)        if (-c >= ESC_REF)
5645          {          {
5646            open_capitem *oc;
5647          recno = -c - ESC_REF;          recno = -c - ESC_REF;
5648    
5649          HANDLE_REFERENCE:    /* Come here from named backref handling */          HANDLE_REFERENCE:    /* Come here from named backref handling */
# Line 5594  we set the flag only if there is a liter Line 5653  we set the flag only if there is a liter
5653          PUT2INC(code, 0, recno);          PUT2INC(code, 0, recno);
5654          cd->backref_map |= (recno < 32)? (1 << recno) : 1;          cd->backref_map |= (recno < 32)? (1 << recno) : 1;
5655          if (recno > cd->top_backref) cd->top_backref = recno;          if (recno > cd->top_backref) cd->top_backref = recno;
5656    
5657            /* Check to see if this back reference is recursive, that it, it
5658            is inside the group that it references. A flag is set so that the
5659            group can be made atomic. */
5660    
5661            for (oc = cd->open_caps; oc != NULL; oc = oc->next)
5662              {
5663              if (oc->number == recno)
5664                {
5665                oc->flag = TRUE;
5666                break;
5667                }
5668              }
5669          }          }
5670    
5671        /* So are Unicode property matches, if supported. */        /* So are Unicode property matches, if supported. */
# Line 5783  int branchfirstbyte, branchreqbyte; Line 5855  int branchfirstbyte, branchreqbyte;
5855  int length;  int length;
5856  int orig_bracount;  int orig_bracount;
5857  int max_bracount;  int max_bracount;
5858    int old_external_options = cd->external_options;
5859  branch_chain bc;  branch_chain bc;
5860    
5861  bc.outer = bcptr;  bc.outer = bcptr;
5862  bc.current = code;  bc.current_branch = code;
5863    
5864  firstbyte = reqbyte = REQ_UNSET;  firstbyte = reqbyte = REQ_UNSET;
5865    
# Line 5805  them global. It tests the value of lengt Line 5878  them global. It tests the value of lengt
5878  pre-compile phase to find out whether anything has yet been compiled or not. */  pre-compile phase to find out whether anything has yet been compiled or not. */
5879    
5880  /* If this is a capturing subpattern, add to the chain of open capturing items  /* If this is a capturing subpattern, add to the chain of open capturing items
5881  so that we can detect them if (*ACCEPT) is encountered. */  so that we can detect them if (*ACCEPT) is encountered. This is also used to
5882    detect groups that contain recursive back references to themselves. */
5883    
5884  if (*code == OP_CBRA)  if (*code == OP_CBRA)
5885    {    {
5886    capnumber = GET2(code, 1 + LINK_SIZE);    capnumber = GET2(code, 1 + LINK_SIZE);
5887    capitem.number = capnumber;    capitem.number = capnumber;
5888    capitem.next = cd->open_caps;    capitem.next = cd->open_caps;
5889      capitem.flag = FALSE;
5890    cd->open_caps = &capitem;    cd->open_caps = &capitem;
5891    }    }
5892    
# Line 5859  for (;;) Line 5934  for (;;)
5934      return FALSE;      return FALSE;
5935      }      }
5936    
5937      /* If the external options have changed during this branch, it means that we
5938      are at the top level, and a leading option setting has been encountered. We
5939      need to re-set the original option values to take account of this so that,
5940      during the pre-compile phase, we know to allow for a re-set at the start of
5941      subsequent branches. */
5942    
5943      if (old_external_options != cd->external_options)
5944        oldims = cd->external_options & PCRE_IMS;
5945    
5946    /* Keep the highest bracket count in case (?| was used and some branch    /* Keep the highest bracket count in case (?| was used and some branch
5947    has fewer than the rest. */    has fewer than the rest. */
5948    
# Line 5959  for (;;) Line 6043  for (;;)
6043        while (branch_length > 0);        while (branch_length > 0);
6044        }        }
6045    
     /* If it was a capturing subpattern, remove it from the chain. */  
   
     if (capnumber > 0) cd->open_caps = cd->open_caps->next;  
   
6046      /* Fill in the ket */      /* Fill in the ket */
6047    
6048      *code = OP_KET;      *code = OP_KET;
6049      PUT(code, 1, code - start_bracket);      PUT(code, 1, code - start_bracket);
6050      code += 1 + LINK_SIZE;      code += 1 + LINK_SIZE;
6051    
6052      /* Resetting option if needed */      /* If it was a capturing subpattern, check to see if it contained any
6053        recursive back references. If so, we must wrap it in atomic brackets.
6054        In any event, remove the block from the chain. */
6055    
6056        if (capnumber > 0)
6057          {
6058          if (cd->open_caps->flag)
6059            {
6060            memmove(start_bracket + 1 + LINK_SIZE, start_bracket,
6061              code - start_bracket);
6062            *start_bracket = OP_ONCE;
6063            code += 1 + LINK_SIZE;
6064            PUT(start_bracket, 1, code - start_bracket);
6065            *code = OP_KET;
6066            PUT(code, 1, code - start_bracket);
6067            code += 1 + LINK_SIZE;
6068            length += 2 + 2*LINK_SIZE;
6069            }
6070          cd->open_caps = cd->open_caps->next;
6071          }
6072    
6073        /* Reset options if needed. */
6074    
6075      if ((options & PCRE_IMS) != oldims && *ptr == CHAR_RIGHT_PARENTHESIS)      if ((options & PCRE_IMS) != oldims && *ptr == CHAR_RIGHT_PARENTHESIS)
6076        {        {
# Line 6018  for (;;) Line 6119  for (;;)
6119      {      {
6120      *code = OP_ALT;      *code = OP_ALT;
6121      PUT(code, 1, code - last_branch);      PUT(code, 1, code - last_branch);
6122      bc.current = last_branch = code;      bc.current_branch = last_branch = code;
6123      code += 1 + LINK_SIZE;      code += 1 + LINK_SIZE;
6124      }      }
6125    
# Line 6434  while (ptr[skipatstart] == CHAR_LEFT_PAR Line 6535  while (ptr[skipatstart] == CHAR_LEFT_PAR
6535    
6536  #ifdef SUPPORT_UTF8  #ifdef SUPPORT_UTF8
6537  if (utf8 && (options & PCRE_NO_UTF8_CHECK) == 0 &&  if (utf8 && (options & PCRE_NO_UTF8_CHECK) == 0 &&
6538       (*erroroffset = _pcre_valid_utf8((uschar *)pattern, -1)) >= 0)       (*erroroffset = _pcre_valid_utf8((USPTR)pattern, -1)) >= 0)
6539    {    {
6540    errorcode = ERR44;    errorcode = ERR44;
6541    goto PCRE_EARLY_ERROR_RETURN2;    goto PCRE_EARLY_ERROR_RETURN2;
# Line 6631  if debugging, leave the test till after Line 6732  if debugging, leave the test till after
6732    
6733  *code++ = OP_END;  *code++ = OP_END;
6734    
6735  #ifndef DEBUG  #ifndef PCRE_DEBUG
6736  if (code - codestart > length) errorcode = ERR23;  if (code - codestart > length) errorcode = ERR23;
6737  #endif  #endif
6738    
# Line 6755  if (reqbyte >= 0 && Line 6856  if (reqbyte >= 0 &&
6856  /* Print out the compiled data if debugging is enabled. This is never the  /* Print out the compiled data if debugging is enabled. This is never the
6857  case when building a production library. */  case when building a production library. */
6858    
6859  #ifdef DEBUG  #ifdef PCRE_DEBUG
   
6860  printf("Length = %d top_bracket = %d top_backref = %d\n",  printf("Length = %d top_bracket = %d top_backref = %d\n",
6861    length, re->top_bracket, re->top_backref);    length, re->top_bracket, re->top_backref);
6862    
# Line 6793  if (code - codestart > length) Line 6893  if (code - codestart > length)
6893    if (errorcodeptr != NULL) *errorcodeptr = ERR23;    if (errorcodeptr != NULL) *errorcodeptr = ERR23;
6894    return NULL;    return NULL;
6895    }    }
6896  #endif   /* DEBUG */  #endif   /* PCRE_DEBUG */
6897    
6898  return (pcre *)re;  return (pcre *)re;
6899  }  }

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