/[pcre]/code/branches/pcre16/pcre_compile.c
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revision 180 by ph10, Wed Jun 13 10:59:18 2007 UTC revision 218 by ph10, Thu Aug 16 10:13:23 2007 UTC
# Line 42  POSSIBILITY OF SUCH DAMAGE. Line 42  POSSIBILITY OF SUCH DAMAGE.
42  supporting internal functions that are not used by other modules. */  supporting internal functions that are not used by other modules. */
43    
44    
45    #ifdef HAVE_CONFIG_H
46    #include <config.h>
47    #endif
48    
49  #define NLBLOCK cd             /* Block containing newline information */  #define NLBLOCK cd             /* Block containing newline information */
50  #define PSSTART start_pattern  /* Field containing processed string start */  #define PSSTART start_pattern  /* Field containing processed string start */
51  #define PSEND   end_pattern    /* Field containing processed string end */  #define PSEND   end_pattern    /* Field containing processed string end */
52    
   
53  #include "pcre_internal.h"  #include "pcre_internal.h"
54    
55    
# Line 62  used by pcretest. DEBUG is not defined w Line 65  used by pcretest. DEBUG is not defined w
65    
66  #define SETBIT(a,b) a[b/8] |= (1 << (b%8))  #define SETBIT(a,b) a[b/8] |= (1 << (b%8))
67    
68    /* Maximum length value to check against when making sure that the integer that
69    holds the compiled pattern length does not overflow. We make it a bit less than
70    INT_MAX to allow for adding in group terminating bytes, so that we don't have
71    to check them every time. */
72    
73    #define OFLOW_MAX (INT_MAX - 20)
74    
75    
76  /*************************************************  /*************************************************
77  *      Code parameters and static tables         *  *      Code parameters and static tables         *
# Line 120  static const short int escapes[] = { Line 130  static const short int escapes[] = {
130  /*  B8 */     0,     0,      0,       0,      0,   ']',    '=',    '-',  /*  B8 */     0,     0,      0,       0,      0,   ']',    '=',    '-',
131  /*  C0 */   '{',-ESC_A, -ESC_B,  -ESC_C, -ESC_D,-ESC_E,      0, -ESC_G,  /*  C0 */   '{',-ESC_A, -ESC_B,  -ESC_C, -ESC_D,-ESC_E,      0, -ESC_G,
132  /*  C8 */-ESC_H,     0,      0,       0,      0,     0,      0,      0,  /*  C8 */-ESC_H,     0,      0,       0,      0,     0,      0,      0,
133  /*  D0 */   '}',     0,      0,       0,      0,     0,      0, -ESC_P,  /*  D0 */   '}',     0, -ESC_K,       0,      0,     0,      0, -ESC_P,
134  /*  D8 */-ESC_Q,-ESC_R,      0,       0,      0,     0,      0,      0,  /*  D8 */-ESC_Q,-ESC_R,      0,       0,      0,     0,      0,      0,
135  /*  E0 */  '\\',     0, -ESC_S,       0,      0,-ESC_V, -ESC_W, -ESC_X,  /*  E0 */  '\\',     0, -ESC_S,       0,      0,-ESC_V, -ESC_W, -ESC_X,
136  /*  E8 */     0,-ESC_Z,      0,       0,      0,     0,      0,      0,  /*  E8 */     0,-ESC_Z,      0,       0,      0,     0,      0,      0,
# Line 130  static const short int escapes[] = { Line 140  static const short int escapes[] = {
140  #endif  #endif
141    
142    
143    /* Table of special "verbs" like (*PRUNE) */
144    
145    typedef struct verbitem {
146      const char *name;
147      int   len;
148      int   op;
149    } verbitem;
150    
151    static verbitem verbs[] = {
152      { "ACCEPT", 6, OP_ACCEPT },
153      { "COMMIT", 6, OP_COMMIT },
154      { "F",      1, OP_FAIL },
155      { "FAIL",   4, OP_FAIL },
156      { "PRUNE",  5, OP_PRUNE },
157      { "SKIP",   4, OP_SKIP  },
158      { "THEN",   4, OP_THEN  }
159    };
160    
161    static int verbcount = sizeof(verbs)/sizeof(verbitem);
162    
163    
164  /* Tables of names of POSIX character classes and their lengths. The list is  /* Tables of names of POSIX character classes and their lengths. The list is
165  terminated by a zero length entry. The first three must be alpha, lower, upper,  terminated by a zero length entry. The first three must be alpha, lower, upper,
166  as this is assumed for handling case independence. */  as this is assumed for handling case independence. */
# Line 203  static const char *error_texts[] = { Line 234  static const char *error_texts[] = {
234    "missing ) after comment",    "missing ) after comment",
235    "parentheses nested too deeply",  /** DEAD **/    "parentheses nested too deeply",  /** DEAD **/
236    /* 20 */    /* 20 */
237    "regular expression too large",    "regular expression is too large",
238    "failed to get memory",    "failed to get memory",
239    "unmatched parentheses",    "unmatched parentheses",
240    "internal error: code overflow",    "internal error: code overflow",
# Line 239  static const char *error_texts[] = { Line 270  static const char *error_texts[] = {
270    "subpattern name is too long (maximum " XSTRING(MAX_NAME_SIZE) " characters)",    "subpattern name is too long (maximum " XSTRING(MAX_NAME_SIZE) " characters)",
271    "too many named subpatterns (maximum " XSTRING(MAX_NAME_COUNT) ")",    "too many named subpatterns (maximum " XSTRING(MAX_NAME_COUNT) ")",
272    /* 50 */    /* 50 */
273    "repeated subpattern is too long",    "repeated subpattern is too long",    /** DEAD **/
274    "octal value is greater than \\377 (not in UTF-8 mode)",    "octal value is greater than \\377 (not in UTF-8 mode)",
275    "internal error: overran compiling workspace",    "internal error: overran compiling workspace",
276    "internal error: previously-checked referenced subpattern not found",    "internal error: previously-checked referenced subpattern not found",
# Line 248  static const char *error_texts[] = { Line 279  static const char *error_texts[] = {
279    "repeating a DEFINE group is not allowed",    "repeating a DEFINE group is not allowed",
280    "inconsistent NEWLINE options",    "inconsistent NEWLINE options",
281    "\\g is not followed by a braced name or an optionally braced non-zero number",    "\\g is not followed by a braced name or an optionally braced non-zero number",
282    "(?+ or (?- or (?(+ or (?(- must be followed by a non-zero number"    "(?+ or (?- or (?(+ or (?(- must be followed by a non-zero number",
283      "(*VERB) with an argument is not supported",
284      /* 60 */
285      "(*VERB) not recognized",
286      "number is too big"
287  };  };
288    
289    
# Line 405  Arguments: Line 440  Arguments:
440    
441  Returns:         zero or positive => a data character  Returns:         zero or positive => a data character
442                   negative => a special escape sequence                   negative => a special escape sequence
443                   on error, errorptr is set                   on error, errorcodeptr is set
444  */  */
445    
446  static int  static int
# Line 489  else Line 524  else
524      c = 0;      c = 0;
525      while ((digitab[ptr[1]] & ctype_digit) != 0)      while ((digitab[ptr[1]] & ctype_digit) != 0)
526        c = c * 10 + *(++ptr) - '0';        c = c * 10 + *(++ptr) - '0';
527    
528        if (c < 0)
529          {
530          *errorcodeptr = ERR61;
531          break;
532          }
533    
534      if (c == 0 || (braced && *(++ptr) != '}'))      if (c == 0 || (braced && *(++ptr) != '}'))
535        {        {
536        *errorcodeptr = ERR57;        *errorcodeptr = ERR57;
537        return 0;        break;
538        }        }
539    
540      if (negated)      if (negated)
# Line 501  else Line 542  else
542        if (c > bracount)        if (c > bracount)
543          {          {
544          *errorcodeptr = ERR15;          *errorcodeptr = ERR15;
545          return 0;          break;
546          }          }
547        c = bracount - (c - 1);        c = bracount - (c - 1);
548        }        }
# Line 530  else Line 571  else
571        c -= '0';        c -= '0';
572        while ((digitab[ptr[1]] & ctype_digit) != 0)        while ((digitab[ptr[1]] & ctype_digit) != 0)
573          c = c * 10 + *(++ptr) - '0';          c = c * 10 + *(++ptr) - '0';
574          if (c < 0)
575            {
576            *errorcodeptr = ERR61;
577            break;
578            }
579        if (c < 10 || c <= bracount)        if (c < 10 || c <= bracount)
580          {          {
581          c = -(ESC_REF + c);          c = -(ESC_REF + c);
# Line 625  else Line 671  else
671      if (c == 0)      if (c == 0)
672        {        {
673        *errorcodeptr = ERR2;        *errorcodeptr = ERR2;
674        return 0;        break;
675        }        }
676    
677  #ifndef EBCDIC  /* ASCII coding */  #ifndef EBCDIC  /* ASCII coding */
# Line 701  if (c == '{') Line 747  if (c == '{')
747      *negptr = TRUE;      *negptr = TRUE;
748      ptr++;      ptr++;
749      }      }
750    for (i = 0; i < sizeof(name) - 1; i++)    for (i = 0; i < (int)sizeof(name) - 1; i++)
751      {      {
752      c = *(++ptr);      c = *(++ptr);
753      if (c == 0) goto ERROR_RETURN;      if (c == 0) goto ERROR_RETURN;
# Line 904  for (; *ptr != 0; ptr++) Line 950  for (; *ptr != 0; ptr++)
950      {      {
951      while (*(++ptr) != ']')      while (*(++ptr) != ']')
952        {        {
953          if (*ptr == 0) return -1;
954        if (*ptr == '\\')        if (*ptr == '\\')
955          {          {
956          if (*(++ptr) == 0) return -1;          if (*(++ptr) == 0) return -1;
# Line 931  for (; *ptr != 0; ptr++) Line 978  for (; *ptr != 0; ptr++)
978    /* An opening parens must now be a real metacharacter */    /* An opening parens must now be a real metacharacter */
979    
980    if (*ptr != '(') continue;    if (*ptr != '(') continue;
981    if (ptr[1] != '?')    if (ptr[1] != '?' && ptr[1] != '*')
982      {      {
983      count++;      count++;
984      if (name == NULL && count == lorn) return count;      if (name == NULL && count == lorn) return count;
# Line 1059  for (;;) Line 1106  for (;;)
1106    {    {
1107    int d;    int d;
1108    register int op = *cc;    register int op = *cc;
   
1109    switch (op)    switch (op)
1110      {      {
1111      case OP_CBRA:      case OP_CBRA:
# Line 1148  for (;;) Line 1194  for (;;)
1194    
1195      case OP_TYPEEXACT:      case OP_TYPEEXACT:
1196      branchlength += GET2(cc,1);      branchlength += GET2(cc,1);
1197        if (cc[3] == OP_PROP || cc[3] == OP_NOTPROP) cc += 2;
1198      cc += 4;      cc += 4;
1199      break;      break;
1200    
# Line 1256  for (;;) Line 1303  for (;;)
1303      code += _pcre_OP_lengths[c];      code += _pcre_OP_lengths[c];
1304      }      }
1305    
1306    /* In UTF-8 mode, opcodes that are followed by a character may be followed by    /* Otherwise, we can get the item's length from the table, except that for
1307    a multi-byte character. The length in the table is a minimum, so we have to    repeated character types, we have to test for \p and \P, which have an extra
1308    arrange to skip the extra bytes. */    two bytes of parameters. */
1309    
1310    else    else
1311      {      {
1312        switch(c)
1313          {
1314          case OP_TYPESTAR:
1315          case OP_TYPEMINSTAR:
1316          case OP_TYPEPLUS:
1317          case OP_TYPEMINPLUS:
1318          case OP_TYPEQUERY:
1319          case OP_TYPEMINQUERY:
1320          case OP_TYPEUPTO:
1321          case OP_TYPEMINUPTO:
1322          case OP_TYPEEXACT:
1323          case OP_TYPEPOSSTAR:
1324          case OP_TYPEPOSPLUS:
1325          case OP_TYPEPOSQUERY:
1326          case OP_TYPEPOSUPTO:
1327          if (code[1] == OP_PROP || code[1] == OP_NOTPROP) code += 2;
1328          break;
1329          }
1330    
1331        /* Add in the fixed length from the table */
1332    
1333      code += _pcre_OP_lengths[c];      code += _pcre_OP_lengths[c];
1334    
1335      /* In UTF-8 mode, opcodes that are followed by a character may be followed by
1336      a multi-byte character. The length in the table is a minimum, so we have to
1337      arrange to skip the extra bytes. */
1338    
1339  #ifdef SUPPORT_UTF8  #ifdef SUPPORT_UTF8
1340      if (utf8) switch(c)      if (utf8) switch(c)
1341        {        {
# Line 1313  for (;;) Line 1386  for (;;)
1386    register int c = *code;    register int c = *code;
1387    if (c == OP_END) return NULL;    if (c == OP_END) return NULL;
1388    if (c == OP_RECURSE) return code;    if (c == OP_RECURSE) return code;
1389    
1390    /* XCLASS is used for classes that cannot be represented just by a bit    /* XCLASS is used for classes that cannot be represented just by a bit
1391    map. This includes negated single high-valued characters. The length in    map. This includes negated single high-valued characters. The length in
1392    the table is zero; the actual length is stored in the compiled code. */    the table is zero; the actual length is stored in the compiled code. */
1393    
1394    if (c == OP_XCLASS) code += GET(code, 1);    if (c == OP_XCLASS) code += GET(code, 1);
1395    
1396    /* Otherwise, we get the item's length from the table. In UTF-8 mode, opcodes    /* Otherwise, we can get the item's length from the table, except that for
1397    that are followed by a character may be followed by a multi-byte character.    repeated character types, we have to test for \p and \P, which have an extra
1398    The length in the table is a minimum, so we have to arrange to skip the extra    two bytes of parameters. */
   bytes. */  
1399    
1400    else    else
1401      {      {
1402        switch(c)
1403          {
1404          case OP_TYPESTAR:
1405          case OP_TYPEMINSTAR:
1406          case OP_TYPEPLUS:
1407          case OP_TYPEMINPLUS:
1408          case OP_TYPEQUERY:
1409          case OP_TYPEMINQUERY:
1410          case OP_TYPEUPTO:
1411          case OP_TYPEMINUPTO:
1412          case OP_TYPEEXACT:
1413          case OP_TYPEPOSSTAR:
1414          case OP_TYPEPOSPLUS:
1415          case OP_TYPEPOSQUERY:
1416          case OP_TYPEPOSUPTO:
1417          if (code[1] == OP_PROP || code[1] == OP_NOTPROP) code += 2;
1418          break;
1419          }
1420    
1421        /* Add in the fixed length from the table */
1422    
1423      code += _pcre_OP_lengths[c];      code += _pcre_OP_lengths[c];
1424    
1425        /* In UTF-8 mode, opcodes that are followed by a character may be followed
1426        by a multi-byte character. The length in the table is a minimum, so we have
1427        to arrange to skip the extra bytes. */
1428    
1429  #ifdef SUPPORT_UTF8  #ifdef SUPPORT_UTF8
1430      if (utf8) switch(c)      if (utf8) switch(c)
1431        {        {
# Line 1399  for (code = first_significant_code(code Line 1497  for (code = first_significant_code(code
1497    
1498    /* For other groups, scan the branches. */    /* For other groups, scan the branches. */
1499    
1500    if (c == OP_BRA || c == OP_CBRA || c == OP_ONCE)    if (c == OP_BRA || c == OP_CBRA || c == OP_ONCE || c == OP_COND)
1501      {      {
1502      BOOL empty_branch;      BOOL empty_branch;
1503      if (GET(code, 1) == 0) return TRUE;    /* Hit unclosed bracket */      if (GET(code, 1) == 0) return TRUE;    /* Hit unclosed bracket */
# Line 1423  for (code = first_significant_code(code Line 1521  for (code = first_significant_code(code
1521    
1522    switch (c)    switch (c)
1523      {      {
1524      /* Check for quantifiers after a class */      /* Check for quantifiers after a class. XCLASS is used for classes that
1525        cannot be represented just by a bit map. This includes negated single
1526        high-valued characters. The length in _pcre_OP_lengths[] is zero; the
1527        actual length is stored in the compiled code, so we must update "code"
1528        here. */
1529    
1530  #ifdef SUPPORT_UTF8  #ifdef SUPPORT_UTF8
1531      case OP_XCLASS:      case OP_XCLASS:
1532      ccode = code + GET(code, 1);      ccode = code += GET(code, 1);
1533      goto CHECK_CLASS_REPEAT;      goto CHECK_CLASS_REPEAT;
1534  #endif  #endif
1535    
# Line 2026  switch(op_code) Line 2128  switch(op_code)
2128    
2129      case ESC_W:      case ESC_W:
2130      return item <= 127 && (cd->ctypes[item] & ctype_word) != 0;      return item <= 127 && (cd->ctypes[item] & ctype_word) != 0;
2131    
2132      case ESC_h:      case ESC_h:
2133      case ESC_H:      case ESC_H:
2134      switch(item)      switch(item)
# Line 2053  switch(op_code) Line 2155  switch(op_code)
2155        return -next != ESC_h;        return -next != ESC_h;
2156        default:        default:
2157        return -next == ESC_h;        return -next == ESC_h;
2158        }        }
2159    
2160      case ESC_v:      case ESC_v:
2161      case ESC_V:      case ESC_V:
2162      switch(item)      switch(item)
# Line 2069  switch(op_code) Line 2171  switch(op_code)
2171        return -next != ESC_v;        return -next != ESC_v;
2172        default:        default:
2173        return -next == ESC_v;        return -next == ESC_v;
2174        }        }
2175    
2176      default:      default:
2177      return FALSE;      return FALSE;
# Line 2093  switch(op_code) Line 2195  switch(op_code)
2195    
2196    case OP_NOT_HSPACE:    case OP_NOT_HSPACE:
2197    return next == -ESC_h;    return next == -ESC_h;
2198    
2199    /* Can't have \S in here because VT matches \S (Perl anomaly) */    /* Can't have \S in here because VT matches \S (Perl anomaly) */
2200    case OP_VSPACE:    case OP_VSPACE:
2201    return next == -ESC_V || next == -ESC_d || next == -ESC_w;    return next == -ESC_V || next == -ESC_d || next == -ESC_w;
2202    
2203    case OP_NOT_VSPACE:    case OP_NOT_VSPACE:
2204    return next == -ESC_v;    return next == -ESC_v;
2205    
2206    case OP_WORDCHAR:    case OP_WORDCHAR:
2207    return next == -ESC_W || next == -ESC_s || next == -ESC_h || next == -ESC_v;    return next == -ESC_W || next == -ESC_s || next == -ESC_h || next == -ESC_v;
2208    
2209    case OP_NOT_WORDCHAR:    case OP_NOT_WORDCHAR:
2210    return next == -ESC_w || next == -ESC_d;    return next == -ESC_w || next == -ESC_d;
2211    
2212    default:    default:
2213    return FALSE;    return FALSE;
2214    }    }
# Line 2255  for (;; ptr++) Line 2357  for (;; ptr++)
2357      */      */
2358    
2359      if (code < last_code) code = last_code;      if (code < last_code) code = last_code;
2360    
2361        /* Paranoid check for integer overflow */
2362    
2363        if (OFLOW_MAX - *lengthptr < code - last_code)
2364          {
2365          *errorcodeptr = ERR20;
2366          goto FAILED;
2367          }
2368    
2369      *lengthptr += code - last_code;      *lengthptr += code - last_code;
2370      DPRINTF(("length=%d added %d c=%c\n", *lengthptr, code - last_code, c));      DPRINTF(("length=%d added %d c=%c\n", *lengthptr, code - last_code, c));
2371    
# Line 2367  for (;; ptr++) Line 2478  for (;; ptr++)
2478      *ptrptr = ptr;      *ptrptr = ptr;
2479      if (lengthptr != NULL)      if (lengthptr != NULL)
2480        {        {
2481          if (OFLOW_MAX - *lengthptr < code - last_code)
2482            {
2483            *errorcodeptr = ERR20;
2484            goto FAILED;
2485            }
2486        *lengthptr += code - last_code;   /* To include callout length */        *lengthptr += code - last_code;   /* To include callout length */
2487        DPRINTF((">> end branch\n"));        DPRINTF((">> end branch\n"));
2488        }        }
# Line 2429  for (;; ptr++) Line 2545  for (;; ptr++)
2545        goto FAILED;        goto FAILED;
2546        }        }
2547    
2548      /* If the first character is '^', set the negation flag and skip it. */      /* If the first character is '^', set the negation flag and skip it. Also,
2549        if the first few characters (either before or after ^) are \Q\E or \E we
2550        skip them too. This makes for compatibility with Perl. */
2551    
2552      if ((c = *(++ptr)) == '^')      negate_class = FALSE;
2553        for (;;)
2554        {        {
       negate_class = TRUE;  
2555        c = *(++ptr);        c = *(++ptr);
2556        }        if (c == '\\')
2557      else          {
2558        {          if (ptr[1] == 'E') ptr++;
2559        negate_class = FALSE;            else if (strncmp((const char *)ptr+1, "Q\\E", 3) == 0) ptr += 3;
2560                else break;
2561            }
2562          else if (!negate_class && c == '^')
2563            negate_class = TRUE;
2564          else break;
2565        }        }
2566    
2567      /* Keep a count of chars with values < 256 so that we can optimize the case      /* Keep a count of chars with values < 256 so that we can optimize the case
# Line 2579  for (;; ptr++) Line 2702  for (;; ptr++)
2702        of the specials, which just set a flag. The sequence \b is a special        of the specials, which just set a flag. The sequence \b is a special
2703        case. Inside a class (and only there) it is treated as backspace.        case. Inside a class (and only there) it is treated as backspace.
2704        Elsewhere it marks a word boundary. Other escapes have preset maps ready        Elsewhere it marks a word boundary. Other escapes have preset maps ready
2705        to or into the one we are building. We assume they have more than one        to 'or' into the one we are building. We assume they have more than one
2706        character in them, so set class_charcount bigger than one. */        character in them, so set class_charcount bigger than one. */
2707    
2708        if (c == '\\')        if (c == '\\')
# Line 2599  for (;; ptr++) Line 2722  for (;; ptr++)
2722            else inescq = TRUE;            else inescq = TRUE;
2723            continue;            continue;
2724            }            }
2725            else if (-c == ESC_E) continue;  /* Ignore orphan \E */
2726    
2727          if (c < 0)          if (c < 0)
2728            {            {
# Line 3521  for (;; ptr++) Line 3645  for (;; ptr++)
3645          goto FAILED;          goto FAILED;
3646          }          }
3647    
       /* This is a paranoid check to stop integer overflow later on */  
   
       if (len > MAX_DUPLENGTH)  
         {  
         *errorcodeptr = ERR50;  
         goto FAILED;  
         }  
   
3648        /* If the maximum repeat count is unlimited, find the end of the bracket        /* If the maximum repeat count is unlimited, find the end of the bracket
3649        by scanning through from the start, and compute the offset back to it        by scanning through from the start, and compute the offset back to it
3650        from the current code pointer. There may be an OP_OPT setting following        from the current code pointer. There may be an OP_OPT setting following
# Line 3617  for (;; ptr++) Line 3733  for (;; ptr++)
3733          if (repeat_min > 1)          if (repeat_min > 1)
3734            {            {
3735            /* 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
3736            just adjust the length as if we had. */            just adjust the length as if we had. Do some paranoid checks for
3737              potential integer overflow. */
3738    
3739            if (lengthptr != NULL)            if (lengthptr != NULL)
3740              *lengthptr += (repeat_min - 1)*length_prevgroup;              {
3741                int delta = (repeat_min - 1)*length_prevgroup;
3742                if ((double)(repeat_min - 1)*(double)length_prevgroup >
3743                                                                (double)INT_MAX ||
3744                    OFLOW_MAX - *lengthptr < delta)
3745                  {
3746                  *errorcodeptr = ERR20;
3747                  goto FAILED;
3748                  }
3749                *lengthptr += delta;
3750                }
3751    
3752            /* This is compiling for real */            /* This is compiling for real */
3753    
# Line 3658  for (;; ptr++) Line 3785  for (;; ptr++)
3785          /* 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
3786          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
3787          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
3788          add 2 + 2*LINKSIZE to allow for the nesting that occurs. */          add 2 + 2*LINKSIZE to allow for the nesting that occurs. Do some
3789            paranoid checks to avoid integer overflow. */
3790    
3791          if (lengthptr != NULL && repeat_max > 0)          if (lengthptr != NULL && repeat_max > 0)
3792            *lengthptr += repeat_max * (length_prevgroup + 1 + 2 + 2*LINK_SIZE) -            {
3793              2 - 2*LINK_SIZE;  /* Last one doesn't nest */            int delta = repeat_max * (length_prevgroup + 1 + 2 + 2*LINK_SIZE) -
3794                          2 - 2*LINK_SIZE;   /* Last one doesn't nest */
3795              if ((double)repeat_max *
3796                    (double)(length_prevgroup + 1 + 2 + 2*LINK_SIZE)
3797                      > (double)INT_MAX ||
3798                  OFLOW_MAX - *lengthptr < delta)
3799                {
3800                *errorcodeptr = ERR20;
3801                goto FAILED;
3802                }
3803              *lengthptr += delta;
3804              }
3805    
3806          /* This is compiling for real */          /* This is compiling for real */
3807    
# Line 3814  for (;; ptr++) Line 3953  for (;; ptr++)
3953      /* ===================================================================*/      /* ===================================================================*/
3954      /* Start of nested parenthesized sub-expression, or comment or lookahead or      /* Start of nested parenthesized sub-expression, or comment or lookahead or
3955      lookbehind or option setting or condition or all the other extended      lookbehind or option setting or condition or all the other extended
3956      parenthesis forms. First deal with the specials; all are introduced by ?,      parenthesis forms.  */
     and the appearance of any of them means that this is not a capturing  
     group. */  
3957    
3958      case '(':      case '(':
3959      newoptions = options;      newoptions = options;
# Line 3825  for (;; ptr++) Line 3962  for (;; ptr++)
3962      save_hwm = cd->hwm;      save_hwm = cd->hwm;
3963      reset_bracount = FALSE;      reset_bracount = FALSE;
3964    
3965      if (*(++ptr) == '?')      /* First deal with various "verbs" that can be introduced by '*'. */
3966    
3967        if (*(++ptr) == '*' && (cd->ctypes[ptr[1]] & ctype_letter) != 0)
3968          {
3969          int i, namelen;
3970          const uschar *name = ++ptr;
3971          previous = NULL;
3972          while ((cd->ctypes[*++ptr] & ctype_letter) != 0);
3973          if (*ptr == ':')
3974            {
3975            *errorcodeptr = ERR59;   /* Not supported */
3976            goto FAILED;
3977            }
3978          if (*ptr != ')')
3979            {
3980            *errorcodeptr = ERR60;
3981            goto FAILED;
3982            }
3983          namelen = ptr - name;
3984          for (i = 0; i < verbcount; i++)
3985            {
3986            if (namelen == verbs[i].len &&
3987                strncmp((char *)name, verbs[i].name, namelen) == 0)
3988              {
3989              *code = verbs[i].op;
3990              if (*code++ == OP_ACCEPT) cd->had_accept = TRUE;
3991              break;
3992              }
3993            }
3994          if (i < verbcount) continue;
3995          *errorcodeptr = ERR60;
3996          goto FAILED;
3997          }
3998    
3999        /* Deal with the extended parentheses; all are introduced by '?', and the
4000        appearance of any of them means that this is not a capturing group. */
4001    
4002        else if (*ptr == '?')
4003        {        {
4004        int i, set, unset, namelen;        int i, set, unset, namelen;
4005        int *optset;        int *optset;
# Line 4067  for (;; ptr++) Line 4241  for (;; ptr++)
4241    
4242          /* ------------------------------------------------------------ */          /* ------------------------------------------------------------ */
4243          case '!':                 /* Negative lookahead */          case '!':                 /* Negative lookahead */
         bravalue = OP_ASSERT_NOT;  
4244          ptr++;          ptr++;
4245            if (*ptr == ')')          /* Optimize (?!) */
4246              {
4247              *code++ = OP_FAIL;
4248              previous = NULL;
4249              continue;
4250              }
4251            bravalue = OP_ASSERT_NOT;
4252          break;          break;
4253    
4254    
# Line 4617  for (;; ptr++) Line 4797  for (;; ptr++)
4797        goto FAILED;        goto FAILED;
4798        }        }
4799    
4800      /* In the pre-compile phase, update the length by the length of the nested      /* In the pre-compile phase, update the length by the length of the group,
4801      group, less the brackets at either end. Then reduce the compiled code to      less the brackets at either end. Then reduce the compiled code to just a
4802      just the brackets so that it doesn't use much memory if it is duplicated by      set of non-capturing brackets so that it doesn't use much memory if it is
4803      a quantifier. */      duplicated by a quantifier.*/
4804    
4805      if (lengthptr != NULL)      if (lengthptr != NULL)
4806        {        {
4807          if (OFLOW_MAX - *lengthptr < length_prevgroup - 2 - 2*LINK_SIZE)
4808            {
4809            *errorcodeptr = ERR20;
4810            goto FAILED;
4811            }
4812        *lengthptr += length_prevgroup - 2 - 2*LINK_SIZE;        *lengthptr += length_prevgroup - 2 - 2*LINK_SIZE;
4813        code++;        *code++ = OP_BRA;
4814        PUTINC(code, 0, 1 + LINK_SIZE);        PUTINC(code, 0, 1 + LINK_SIZE);
4815        *code++ = OP_KET;        *code++ = OP_KET;
4816        PUTINC(code, 0, 1 + LINK_SIZE);        PUTINC(code, 0, 1 + LINK_SIZE);
4817          break;    /* No need to waste time with special character handling */
4818        }        }
4819    
4820      /* Otherwise update the main code pointer to the end of the group. */      /* Otherwise update the main code pointer to the end of the group. */
4821    
4822      else code = tempcode;      code = tempcode;
4823    
4824      /* For a DEFINE group, required and first character settings are not      /* For a DEFINE group, required and first character settings are not
4825      relevant. */      relevant. */
# Line 5119  for (;;) Line 5305  for (;;)
5305      *ptrptr = ptr;      *ptrptr = ptr;
5306      *firstbyteptr = firstbyte;      *firstbyteptr = firstbyte;
5307      *reqbyteptr = reqbyte;      *reqbyteptr = reqbyte;
5308      if (lengthptr != NULL) *lengthptr += length;      if (lengthptr != NULL)
5309          {
5310          if (OFLOW_MAX - *lengthptr < length)
5311            {
5312            *errorcodeptr = ERR20;
5313            return FALSE;
5314            }
5315          *lengthptr += length;
5316          }
5317      return TRUE;      return TRUE;
5318      }      }
5319    
# Line 5647  cd->start_code = codestart; Line 5841  cd->start_code = codestart;
5841  cd->hwm = cworkspace;  cd->hwm = cworkspace;
5842  cd->req_varyopt = 0;  cd->req_varyopt = 0;
5843  cd->nopartial = FALSE;  cd->nopartial = FALSE;
5844    cd->had_accept = FALSE;
5845    
5846  /* Set up a starting, non-extracting bracket, then compile the expression. On  /* Set up a starting, non-extracting bracket, then compile the expression. On
5847  error, errorcode will be set non-zero, so we don't need to look at the result  error, errorcode will be set non-zero, so we don't need to look at the result
# Line 5661  re->top_bracket = cd->bracount; Line 5856  re->top_bracket = cd->bracount;
5856  re->top_backref = cd->top_backref;  re->top_backref = cd->top_backref;
5857    
5858  if (cd->nopartial) re->options |= PCRE_NOPARTIAL;  if (cd->nopartial) re->options |= PCRE_NOPARTIAL;
5859    if (cd->had_accept) reqbyte = -1;   /* Must disable after (*ACCEPT) */
5860    
5861  /* If not reached end of pattern on success, there's an excess bracket. */  /* If not reached end of pattern on success, there's an excess bracket. */
5862    

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