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      1 /*************************************************
      2 *      Perl-Compatible Regular Expressions       *
      3 *************************************************/
      4 
      5 
      6 /* PCRE is a library of functions to support regular expressions whose syntax
      7 and semantics are as close as possible to those of the Perl 5 language.
      8 
      9                        Written by Philip Hazel
     10            Copyright (c) 1997-2010 University of Cambridge
     11 
     12 -----------------------------------------------------------------------------
     13 Redistribution and use in source and binary forms, with or without
     14 modification, are permitted provided that the following conditions are met:
     15 
     16     * Redistributions of source code must retain the above copyright notice,
     17       this list of conditions and the following disclaimer.
     18 
     19     * Redistributions in binary form must reproduce the above copyright
     20       notice, this list of conditions and the following disclaimer in the
     21       documentation and/or other materials provided with the distribution.
     22 
     23     * Neither the name of the University of Cambridge nor the names of its
     24       contributors may be used to endorse or promote products derived from
     25       this software without specific prior written permission.
     26 
     27 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
     28 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     29 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     30 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
     31 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     32 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     33 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     34 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     35 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     36 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     37 POSSIBILITY OF SUCH DAMAGE.
     38 -----------------------------------------------------------------------------
     39 */
     40 
     41 /* This header contains definitions that are shared between the different
     42 modules, but which are not relevant to the exported API. This includes some
     43 functions whose names all begin with "_pcre_". */
     44 
     45 #ifndef PCRE_INTERNAL_H
     46 #define PCRE_INTERNAL_H
     47 
     48 /* Define PCRE_DEBUG to get debugging output on stdout. */
     49 
     50 #if 0
     51 #define PCRE_DEBUG
     52 #endif
     53 
     54 /* We do not support both EBCDIC and UTF-8 at the same time. The "configure"
     55 script prevents both being selected, but not everybody uses "configure". */
     56 
     57 #if defined EBCDIC && defined SUPPORT_UTF8
     58 #error The use of both EBCDIC and SUPPORT_UTF8 is not supported.
     59 #endif
     60 
     61 /* If SUPPORT_UCP is defined, SUPPORT_UTF8 must also be defined. The
     62 "configure" script ensures this, but not everybody uses "configure". */
     63 
     64 #if defined SUPPORT_UCP && !defined SUPPORT_UTF8
     65 #define SUPPORT_UTF8 1
     66 #endif
     67 
     68 /* Use a macro for debugging printing, 'cause that eliminates the use of #ifdef
     69 inline, and there are *still* stupid compilers about that don't like indented
     70 pre-processor statements, or at least there were when I first wrote this. After
     71 all, it had only been about 10 years then...
     72 
     73 It turns out that the Mac Debugging.h header also defines the macro DPRINTF, so
     74 be absolutely sure we get our version. */
     75 
     76 #undef DPRINTF
     77 #ifdef PCRE_DEBUG
     78 #define DPRINTF(p) printf p
     79 #else
     80 #define DPRINTF(p) /* Nothing */
     81 #endif
     82 
     83 
     84 /* Standard C headers plus the external interface definition. The only time
     85 setjmp and stdarg are used is when NO_RECURSE is set. */
     86 
     87 #include <ctype.h>
     88 #include <limits.h>
     89 #include <stddef.h>
     90 #include <stdio.h>
     91 #include <stdlib.h>
     92 #include <string.h>
     93 
     94 /* When compiling a DLL for Windows, the exported symbols have to be declared
     95 using some MS magic. I found some useful information on this web page:
     96 http://msdn2.microsoft.com/en-us/library/y4h7bcy6(VS.80).aspx. According to the
     97 information there, using __declspec(dllexport) without "extern" we have a
     98 definition; with "extern" we have a declaration. The settings here override the
     99 setting in pcre.h (which is included below); it defines only PCRE_EXP_DECL,
    100 which is all that is needed for applications (they just import the symbols). We
    101 use:
    102 
    103   PCRE_EXP_DECL       for declarations
    104   PCRE_EXP_DEFN       for definitions of exported functions
    105   PCRE_EXP_DATA_DEFN  for definitions of exported variables
    106 
    107 The reason for the two DEFN macros is that in non-Windows environments, one
    108 does not want to have "extern" before variable definitions because it leads to
    109 compiler warnings. So we distinguish between functions and variables. In
    110 Windows, the two should always be the same.
    111 
    112 The reason for wrapping this in #ifndef PCRE_EXP_DECL is so that pcretest,
    113 which is an application, but needs to import this file in order to "peek" at
    114 internals, can #include pcre.h first to get an application's-eye view.
    115 
    116 In principle, people compiling for non-Windows, non-Unix-like (i.e. uncommon,
    117 special-purpose environments) might want to stick other stuff in front of
    118 exported symbols. That's why, in the non-Windows case, we set PCRE_EXP_DEFN and
    119 PCRE_EXP_DATA_DEFN only if they are not already set. */
    120 
    121 #ifndef PCRE_EXP_DECL
    122 #  ifdef _WIN32
    123 #    ifndef PCRE_STATIC
    124 #      define PCRE_EXP_DECL       extern __declspec(dllexport)
    125 #      define PCRE_EXP_DEFN       __declspec(dllexport)
    126 #      define PCRE_EXP_DATA_DEFN  __declspec(dllexport)
    127 #    else
    128 #      define PCRE_EXP_DECL       extern
    129 #      define PCRE_EXP_DEFN
    130 #      define PCRE_EXP_DATA_DEFN
    131 #    endif
    132 #  else
    133 #    ifdef __cplusplus
    134 #      define PCRE_EXP_DECL       extern "C"
    135 #    else
    136 #      define PCRE_EXP_DECL       extern
    137 #    endif
    138 #    ifndef PCRE_EXP_DEFN
    139 #      define PCRE_EXP_DEFN       PCRE_EXP_DECL
    140 #    endif
    141 #    ifndef PCRE_EXP_DATA_DEFN
    142 #      define PCRE_EXP_DATA_DEFN
    143 #    endif
    144 #  endif
    145 #endif
    146 
    147 /* When compiling with the MSVC compiler, it is sometimes necessary to include
    148 a "calling convention" before exported function names. (This is secondhand
    149 information; I know nothing about MSVC myself). For example, something like
    150 
    151   void __cdecl function(....)
    152 
    153 might be needed. In order so make this easy, all the exported functions have
    154 PCRE_CALL_CONVENTION just before their names. It is rarely needed; if not
    155 set, we ensure here that it has no effect. */
    156 
    157 #ifndef PCRE_CALL_CONVENTION
    158 #define PCRE_CALL_CONVENTION
    159 #endif
    160 
    161 /* We need to have types that specify unsigned 16-bit and 32-bit integers. We
    162 cannot determine these outside the compilation (e.g. by running a program as
    163 part of "configure") because PCRE is often cross-compiled for use on other
    164 systems. Instead we make use of the maximum sizes that are available at
    165 preprocessor time in standard C environments. */
    166 
    167 #if USHRT_MAX == 65535
    168   typedef unsigned short pcre_uint16;
    169   typedef short pcre_int16;
    170 #elif UINT_MAX == 65535
    171   typedef unsigned int pcre_uint16;
    172   typedef int pcre_int16;
    173 #else
    174   #error Cannot determine a type for 16-bit unsigned integers
    175 #endif
    176 
    177 #if UINT_MAX == 4294967295
    178   typedef unsigned int pcre_uint32;
    179   typedef int pcre_int32;
    180 #elif ULONG_MAX == 4294967295
    181   typedef unsigned long int pcre_uint32;
    182   typedef long int pcre_int32;
    183 #else
    184   #error Cannot determine a type for 32-bit unsigned integers
    185 #endif
    186 
    187 /* When checking for integer overflow in pcre_compile(), we need to handle
    188 large integers. If a 64-bit integer type is available, we can use that.
    189 Otherwise we have to cast to double, which of course requires floating point
    190 arithmetic. Handle this by defining a macro for the appropriate type. If
    191 stdint.h is available, include it; it may define INT64_MAX. Systems that do not
    192 have stdint.h (e.g. Solaris) may have inttypes.h. The macro int64_t may be set
    193 by "configure". */
    194 
    195 #if HAVE_STDINT_H
    196 #include <stdint.h>
    197 #elif HAVE_INTTYPES_H
    198 #include <inttypes.h>
    199 #endif
    200 
    201 #if defined INT64_MAX || defined int64_t
    202 #define INT64_OR_DOUBLE int64_t
    203 #else
    204 #define INT64_OR_DOUBLE double
    205 #endif
    206 
    207 /* All character handling must be done as unsigned characters. Otherwise there
    208 are problems with top-bit-set characters and functions such as isspace().
    209 However, we leave the interface to the outside world as char *, because that
    210 should make things easier for callers. We define a short type for unsigned char
    211 to save lots of typing. I tried "uchar", but it causes problems on Digital
    212 Unix, where it is defined in sys/types, so use "uschar" instead. */
    213 
    214 typedef unsigned char uschar;
    215 
    216 /* This is an unsigned int value that no character can ever have. UTF-8
    217 characters only go up to 0x7fffffff (though Unicode doesn't go beyond
    218 0x0010ffff). */
    219 
    220 #define NOTACHAR 0xffffffff
    221 
    222 /* PCRE is able to support several different kinds of newline (CR, LF, CRLF,
    223 "any" and "anycrlf" at present). The following macros are used to package up
    224 testing for newlines. NLBLOCK, PSSTART, and PSEND are defined in the various
    225 modules to indicate in which datablock the parameters exist, and what the
    226 start/end of string field names are. */
    227 
    228 #define NLTYPE_FIXED    0     /* Newline is a fixed length string */
    229 #define NLTYPE_ANY      1     /* Newline is any Unicode line ending */
    230 #define NLTYPE_ANYCRLF  2     /* Newline is CR, LF, or CRLF */
    231 
    232 /* This macro checks for a newline at the given position */
    233 
    234 #define IS_NEWLINE(p) \
    235   ((NLBLOCK->nltype != NLTYPE_FIXED)? \
    236     ((p) < NLBLOCK->PSEND && \
    237      _pcre_is_newline((p), NLBLOCK->nltype, NLBLOCK->PSEND, &(NLBLOCK->nllen),\
    238        utf8)) \
    239     : \
    240     ((p) <= NLBLOCK->PSEND - NLBLOCK->nllen && \
    241      (p)[0] == NLBLOCK->nl[0] && \
    242      (NLBLOCK->nllen == 1 || (p)[1] == NLBLOCK->nl[1]) \
    243     ) \
    244   )
    245 
    246 /* This macro checks for a newline immediately preceding the given position */
    247 
    248 #define WAS_NEWLINE(p) \
    249   ((NLBLOCK->nltype != NLTYPE_FIXED)? \
    250     ((p) > NLBLOCK->PSSTART && \
    251      _pcre_was_newline((p), NLBLOCK->nltype, NLBLOCK->PSSTART, \
    252        &(NLBLOCK->nllen), utf8)) \
    253     : \
    254     ((p) >= NLBLOCK->PSSTART + NLBLOCK->nllen && \
    255      (p)[-NLBLOCK->nllen] == NLBLOCK->nl[0] && \
    256      (NLBLOCK->nllen == 1 || (p)[-NLBLOCK->nllen+1] == NLBLOCK->nl[1]) \
    257     ) \
    258   )
    259 
    260 /* When PCRE is compiled as a C++ library, the subject pointer can be replaced
    261 with a custom type. This makes it possible, for example, to allow pcre_exec()
    262 to process subject strings that are discontinuous by using a smart pointer
    263 class. It must always be possible to inspect all of the subject string in
    264 pcre_exec() because of the way it backtracks. Two macros are required in the
    265 normal case, for sign-unspecified and unsigned char pointers. The former is
    266 used for the external interface and appears in pcre.h, which is why its name
    267 must begin with PCRE_. */
    268 
    269 #ifdef CUSTOM_SUBJECT_PTR
    270 #define PCRE_SPTR CUSTOM_SUBJECT_PTR
    271 #define USPTR CUSTOM_SUBJECT_PTR
    272 #else
    273 #define PCRE_SPTR const char *
    274 #define USPTR const unsigned char *
    275 #endif
    276 
    277 
    278 
    279 /* Include the public PCRE header and the definitions of UCP character property
    280 values. */
    281 
    282 #include "pcre.h"
    283 #include "ucp.h"
    284 
    285 /* When compiling for use with the Virtual Pascal compiler, these functions
    286 need to have their names changed. PCRE must be compiled with the -DVPCOMPAT
    287 option on the command line. */
    288 
    289 #ifdef VPCOMPAT
    290 #define strlen(s)        _strlen(s)
    291 #define strncmp(s1,s2,m) _strncmp(s1,s2,m)
    292 #define memcmp(s,c,n)    _memcmp(s,c,n)
    293 #define memcpy(d,s,n)    _memcpy(d,s,n)
    294 #define memmove(d,s,n)   _memmove(d,s,n)
    295 #define memset(s,c,n)    _memset(s,c,n)
    296 #else  /* VPCOMPAT */
    297 
    298 /* To cope with SunOS4 and other systems that lack memmove() but have bcopy(),
    299 define a macro for memmove() if HAVE_MEMMOVE is false, provided that HAVE_BCOPY
    300 is set. Otherwise, include an emulating function for those systems that have
    301 neither (there some non-Unix environments where this is the case). */
    302 
    303 #ifndef HAVE_MEMMOVE
    304 #undef  memmove        /* some systems may have a macro */
    305 #ifdef HAVE_BCOPY
    306 #define memmove(a, b, c) bcopy(b, a, c)
    307 #else  /* HAVE_BCOPY */
    308 static void *
    309 pcre_memmove(void *d, const void *s, size_t n)
    310 {
    311 size_t i;
    312 unsigned char *dest = (unsigned char *)d;
    313 const unsigned char *src = (const unsigned char *)s;
    314 if (dest > src)
    315   {
    316   dest += n;
    317   src += n;
    318   for (i = 0; i < n; ++i) *(--dest) = *(--src);
    319   return (void *)dest;
    320   }
    321 else
    322   {
    323   for (i = 0; i < n; ++i) *dest++ = *src++;
    324   return (void *)(dest - n);
    325   }
    326 }
    327 #define memmove(a, b, c) pcre_memmove(a, b, c)
    328 #endif   /* not HAVE_BCOPY */
    329 #endif   /* not HAVE_MEMMOVE */
    330 #endif   /* not VPCOMPAT */
    331 
    332 
    333 /* PCRE keeps offsets in its compiled code as 2-byte quantities (always stored
    334 in big-endian order) by default. These are used, for example, to link from the
    335 start of a subpattern to its alternatives and its end. The use of 2 bytes per
    336 offset limits the size of the compiled regex to around 64K, which is big enough
    337 for almost everybody. However, I received a request for an even bigger limit.
    338 For this reason, and also to make the code easier to maintain, the storing and
    339 loading of offsets from the byte string is now handled by the macros that are
    340 defined here.
    341 
    342 The macros are controlled by the value of LINK_SIZE. This defaults to 2 in
    343 the config.h file, but can be overridden by using -D on the command line. This
    344 is automated on Unix systems via the "configure" command. */
    345 
    346 #if LINK_SIZE == 2
    347 
    348 #define PUT(a,n,d)   \
    349   (a[n] = (d) >> 8), \
    350   (a[(n)+1] = (d) & 255)
    351 
    352 #define GET(a,n) \
    353   (((a)[n] << 8) | (a)[(n)+1])
    354 
    355 #define MAX_PATTERN_SIZE (1 << 16)
    356 
    357 
    358 #elif LINK_SIZE == 3
    359 
    360 #define PUT(a,n,d)       \
    361   (a[n] = (d) >> 16),    \
    362   (a[(n)+1] = (d) >> 8), \
    363   (a[(n)+2] = (d) & 255)
    364 
    365 #define GET(a,n) \
    366   (((a)[n] << 16) | ((a)[(n)+1] << 8) | (a)[(n)+2])
    367 
    368 #define MAX_PATTERN_SIZE (1 << 24)
    369 
    370 
    371 #elif LINK_SIZE == 4
    372 
    373 #define PUT(a,n,d)        \
    374   (a[n] = (d) >> 24),     \
    375   (a[(n)+1] = (d) >> 16), \
    376   (a[(n)+2] = (d) >> 8),  \
    377   (a[(n)+3] = (d) & 255)
    378 
    379 #define GET(a,n) \
    380   (((a)[n] << 24) | ((a)[(n)+1] << 16) | ((a)[(n)+2] << 8) | (a)[(n)+3])
    381 
    382 #define MAX_PATTERN_SIZE (1 << 30)   /* Keep it positive */
    383 
    384 
    385 #else
    386 #error LINK_SIZE must be either 2, 3, or 4
    387 #endif
    388 
    389 
    390 /* Convenience macro defined in terms of the others */
    391 
    392 #define PUTINC(a,n,d)   PUT(a,n,d), a += LINK_SIZE
    393 
    394 
    395 /* PCRE uses some other 2-byte quantities that do not change when the size of
    396 offsets changes. There are used for repeat counts and for other things such as
    397 capturing parenthesis numbers in back references. */
    398 
    399 #define PUT2(a,n,d)   \
    400   a[n] = (d) >> 8; \
    401   a[(n)+1] = (d) & 255
    402 
    403 #define GET2(a,n) \
    404   (((a)[n] << 8) | (a)[(n)+1])
    405 
    406 #define PUT2INC(a,n,d)  PUT2(a,n,d), a += 2
    407 
    408 
    409 /* When UTF-8 encoding is being used, a character is no longer just a single
    410 byte. The macros for character handling generate simple sequences when used in
    411 byte-mode, and more complicated ones for UTF-8 characters. GETCHARLENTEST is
    412 not used when UTF-8 is not supported, so it is not defined, and BACKCHAR should
    413 never be called in byte mode. To make sure they can never even appear when
    414 UTF-8 support is omitted, we don't even define them. */
    415 
    416 #ifndef SUPPORT_UTF8
    417 #define GETCHAR(c, eptr) c = *eptr;
    418 #define GETCHARTEST(c, eptr) c = *eptr;
    419 #define GETCHARINC(c, eptr) c = *eptr++;
    420 #define GETCHARINCTEST(c, eptr) c = *eptr++;
    421 #define GETCHARLEN(c, eptr, len) c = *eptr;
    422 /* #define GETCHARLENTEST(c, eptr, len) */
    423 /* #define BACKCHAR(eptr) */
    424 
    425 #else   /* SUPPORT_UTF8 */
    426 
    427 /* These macros were originally written in the form of loops that used data
    428 from the tables whose names start with _pcre_utf8_table. They were rewritten by
    429 a user so as not to use loops, because in some environments this gives a
    430 significant performance advantage, and it seems never to do any harm. */
    431 
    432 /* Base macro to pick up the remaining bytes of a UTF-8 character, not
    433 advancing the pointer. */
    434 
    435 #define GETUTF8(c, eptr) \
    436     { \
    437     if ((c & 0x20) == 0) \
    438       c = ((c & 0x1f) << 6) | (eptr[1] & 0x3f); \
    439     else if ((c & 0x10) == 0) \
    440       c = ((c & 0x0f) << 12) | ((eptr[1] & 0x3f) << 6) | (eptr[2] & 0x3f); \
    441     else if ((c & 0x08) == 0) \
    442       c = ((c & 0x07) << 18) | ((eptr[1] & 0x3f) << 12) | \
    443       ((eptr[2] & 0x3f) << 6) | (eptr[3] & 0x3f); \
    444     else if ((c & 0x04) == 0) \
    445       c = ((c & 0x03) << 24) | ((eptr[1] & 0x3f) << 18) | \
    446           ((eptr[2] & 0x3f) << 12) | ((eptr[3] & 0x3f) << 6) | \
    447           (eptr[4] & 0x3f); \
    448     else \
    449       c = ((c & 0x01) << 30) | ((eptr[1] & 0x3f) << 24) | \
    450           ((eptr[2] & 0x3f) << 18) | ((eptr[3] & 0x3f) << 12) | \
    451           ((eptr[4] & 0x3f) << 6) | (eptr[5] & 0x3f); \
    452     }
    453 
    454 /* Get the next UTF-8 character, not advancing the pointer. This is called when
    455 we know we are in UTF-8 mode. */
    456 
    457 #define GETCHAR(c, eptr) \
    458   c = *eptr; \
    459   if (c >= 0xc0) GETUTF8(c, eptr);
    460 
    461 /* Get the next UTF-8 character, testing for UTF-8 mode, and not advancing the
    462 pointer. */
    463 
    464 #define GETCHARTEST(c, eptr) \
    465   c = *eptr; \
    466   if (utf8 && c >= 0xc0) GETUTF8(c, eptr);
    467 
    468 /* Base macro to pick up the remaining bytes of a UTF-8 character, advancing
    469 the pointer. */
    470 
    471 #define GETUTF8INC(c, eptr) \
    472     { \
    473     if ((c & 0x20) == 0) \
    474       c = ((c & 0x1f) << 6) | (*eptr++ & 0x3f); \
    475     else if ((c & 0x10) == 0) \
    476       { \
    477       c = ((c & 0x0f) << 12) | ((*eptr & 0x3f) << 6) | (eptr[1] & 0x3f); \
    478       eptr += 2; \
    479       } \
    480     else if ((c & 0x08) == 0) \
    481       { \
    482       c = ((c & 0x07) << 18) | ((*eptr & 0x3f) << 12) | \
    483           ((eptr[1] & 0x3f) << 6) | (eptr[2] & 0x3f); \
    484       eptr += 3; \
    485       } \
    486     else if ((c & 0x04) == 0) \
    487       { \
    488       c = ((c & 0x03) << 24) | ((*eptr & 0x3f) << 18) | \
    489           ((eptr[1] & 0x3f) << 12) | ((eptr[2] & 0x3f) << 6) | \
    490           (eptr[3] & 0x3f); \
    491       eptr += 4; \
    492       } \
    493     else \
    494       { \
    495       c = ((c & 0x01) << 30) | ((*eptr & 0x3f) << 24) | \
    496           ((eptr[1] & 0x3f) << 18) | ((eptr[2] & 0x3f) << 12) | \
    497           ((eptr[3] & 0x3f) << 6) | (eptr[4] & 0x3f); \
    498       eptr += 5; \
    499       } \
    500     }
    501 
    502 /* Get the next UTF-8 character, advancing the pointer. This is called when we
    503 know we are in UTF-8 mode. */
    504 
    505 #define GETCHARINC(c, eptr) \
    506   c = *eptr++; \
    507   if (c >= 0xc0) GETUTF8INC(c, eptr);
    508 
    509 /* Get the next character, testing for UTF-8 mode, and advancing the pointer.
    510 This is called when we don't know if we are in UTF-8 mode. */
    511 
    512 #define GETCHARINCTEST(c, eptr) \
    513   c = *eptr++; \
    514   if (utf8 && c >= 0xc0) GETUTF8INC(c, eptr);
    515 
    516 /* Base macro to pick up the remaining bytes of a UTF-8 character, not
    517 advancing the pointer, incrementing the length. */
    518 
    519 #define GETUTF8LEN(c, eptr, len) \
    520     { \
    521     if ((c & 0x20) == 0) \
    522       { \
    523       c = ((c & 0x1f) << 6) | (eptr[1] & 0x3f); \
    524       len++; \
    525       } \
    526     else if ((c & 0x10)  == 0) \
    527       { \
    528       c = ((c & 0x0f) << 12) | ((eptr[1] & 0x3f) << 6) | (eptr[2] & 0x3f); \
    529       len += 2; \
    530       } \
    531     else if ((c & 0x08)  == 0) \
    532       {\
    533       c = ((c & 0x07) << 18) | ((eptr[1] & 0x3f) << 12) | \
    534           ((eptr[2] & 0x3f) << 6) | (eptr[3] & 0x3f); \
    535       len += 3; \
    536       } \
    537     else if ((c & 0x04)  == 0) \
    538       { \
    539       c = ((c & 0x03) << 24) | ((eptr[1] & 0x3f) << 18) | \
    540           ((eptr[2] & 0x3f) << 12) | ((eptr[3] & 0x3f) << 6) | \
    541           (eptr[4] & 0x3f); \
    542       len += 4; \
    543       } \
    544     else \
    545       {\
    546       c = ((c & 0x01) << 30) | ((eptr[1] & 0x3f) << 24) | \
    547           ((eptr[2] & 0x3f) << 18) | ((eptr[3] & 0x3f) << 12) | \
    548           ((eptr[4] & 0x3f) << 6) | (eptr[5] & 0x3f); \
    549       len += 5; \
    550       } \
    551     }
    552 
    553 /* Get the next UTF-8 character, not advancing the pointer, incrementing length
    554 if there are extra bytes. This is called when we know we are in UTF-8 mode. */
    555 
    556 #define GETCHARLEN(c, eptr, len) \
    557   c = *eptr; \
    558   if (c >= 0xc0) GETUTF8LEN(c, eptr, len);
    559 
    560 /* Get the next UTF-8 character, testing for UTF-8 mode, not advancing the
    561 pointer, incrementing length if there are extra bytes. This is called when we
    562 do not know if we are in UTF-8 mode. */
    563 
    564 #define GETCHARLENTEST(c, eptr, len) \
    565   c = *eptr; \
    566   if (utf8 && c >= 0xc0) GETUTF8LEN(c, eptr, len);
    567 
    568 /* If the pointer is not at the start of a character, move it back until
    569 it is. This is called only in UTF-8 mode - we don't put a test within the macro
    570 because almost all calls are already within a block of UTF-8 only code. */
    571 
    572 #define BACKCHAR(eptr) while((*eptr & 0xc0) == 0x80) eptr--
    573 
    574 #endif  /* SUPPORT_UTF8 */
    575 
    576 
    577 /* In case there is no definition of offsetof() provided - though any proper
    578 Standard C system should have one. */
    579 
    580 #ifndef offsetof
    581 #define offsetof(p_type,field) ((size_t)&(((p_type *)0)->field))
    582 #endif
    583 
    584 
    585 /* These are the public options that can change during matching. */
    586 
    587 #define PCRE_IMS (PCRE_CASELESS|PCRE_MULTILINE|PCRE_DOTALL)
    588 
    589 /* Private flags containing information about the compiled regex. They used to
    590 live at the top end of the options word, but that got almost full, so now they
    591 are in a 16-bit flags word. From release 8.00, PCRE_NOPARTIAL is unused, as
    592 the restrictions on partial matching have been lifted. It remains for backwards
    593 compatibility. */
    594 
    595 #define PCRE_NOPARTIAL     0x0001  /* can't use partial with this regex */
    596 #define PCRE_FIRSTSET      0x0002  /* first_byte is set */
    597 #define PCRE_REQCHSET      0x0004  /* req_byte is set */
    598 #define PCRE_STARTLINE     0x0008  /* start after \n for multiline */
    599 #define PCRE_JCHANGED      0x0010  /* j option used in regex */
    600 #define PCRE_HASCRORLF     0x0020  /* explicit \r or \n in pattern */
    601 
    602 /* Options for the "extra" block produced by pcre_study(). */
    603 
    604 #define PCRE_STUDY_MAPPED   0x01     /* a map of starting chars exists */
    605 #define PCRE_STUDY_MINLEN   0x02     /* a minimum length field exists */
    606 
    607 /* Masks for identifying the public options that are permitted at compile
    608 time, run time, or study time, respectively. */
    609 
    610 #define PCRE_NEWLINE_BITS (PCRE_NEWLINE_CR|PCRE_NEWLINE_LF|PCRE_NEWLINE_ANY| \
    611                            PCRE_NEWLINE_ANYCRLF)
    612 
    613 #define PUBLIC_COMPILE_OPTIONS \
    614   (PCRE_CASELESS|PCRE_EXTENDED|PCRE_ANCHORED|PCRE_MULTILINE| \
    615    PCRE_DOTALL|PCRE_DOLLAR_ENDONLY|PCRE_EXTRA|PCRE_UNGREEDY|PCRE_UTF8| \
    616    PCRE_NO_AUTO_CAPTURE|PCRE_NO_UTF8_CHECK|PCRE_AUTO_CALLOUT|PCRE_FIRSTLINE| \
    617    PCRE_DUPNAMES|PCRE_NEWLINE_BITS|PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE| \
    618    PCRE_JAVASCRIPT_COMPAT|PCRE_UCP|PCRE_NO_START_OPTIMIZE)
    619 
    620 #define PUBLIC_EXEC_OPTIONS \
    621   (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NOTEMPTY_ATSTART| \
    622    PCRE_NO_UTF8_CHECK|PCRE_PARTIAL_HARD|PCRE_PARTIAL_SOFT|PCRE_NEWLINE_BITS| \
    623    PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE|PCRE_NO_START_OPTIMIZE)
    624 
    625 #define PUBLIC_DFA_EXEC_OPTIONS \
    626   (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NOTEMPTY_ATSTART| \
    627    PCRE_NO_UTF8_CHECK|PCRE_PARTIAL_HARD|PCRE_PARTIAL_SOFT|PCRE_DFA_SHORTEST| \
    628    PCRE_DFA_RESTART|PCRE_NEWLINE_BITS|PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE| \
    629    PCRE_NO_START_OPTIMIZE)
    630 
    631 #define PUBLIC_STUDY_OPTIONS 0   /* None defined */
    632 
    633 /* Magic number to provide a small check against being handed junk. Also used
    634 to detect whether a pattern was compiled on a host of different endianness. */
    635 
    636 #define MAGIC_NUMBER  0x50435245UL   /* 'PCRE' */
    637 
    638 /* Negative values for the firstchar and reqchar variables */
    639 
    640 #define REQ_UNSET (-2)
    641 #define REQ_NONE  (-1)
    642 
    643 /* The maximum remaining length of subject we are prepared to search for a
    644 req_byte match. */
    645 
    646 #define REQ_BYTE_MAX 1000
    647 
    648 /* Flags added to firstbyte or reqbyte; a "non-literal" item is either a
    649 variable-length repeat, or a anything other than literal characters. */
    650 
    651 #define REQ_CASELESS 0x0100    /* indicates caselessness */
    652 #define REQ_VARY     0x0200    /* reqbyte followed non-literal item */
    653 
    654 /* Miscellaneous definitions. The #ifndef is to pacify compiler warnings in
    655 environments where these macros are defined elsewhere. Unfortunately, there
    656 is no way to do the same for the typedef. */
    657 
    658 typedef int BOOL;
    659 
    660 #ifndef FALSE
    661 #define FALSE   0
    662 #define TRUE    1
    663 #endif
    664 
    665 /* If PCRE is to support UTF-8 on EBCDIC platforms, we cannot use normal
    666 character constants like '*' because the compiler would emit their EBCDIC code,
    667 which is different from their ASCII/UTF-8 code. Instead we define macros for
    668 the characters so that they always use the ASCII/UTF-8 code when UTF-8 support
    669 is enabled. When UTF-8 support is not enabled, the definitions use character
    670 literals. Both character and string versions of each character are needed, and
    671 there are some longer strings as well.
    672 
    673 This means that, on EBCDIC platforms, the PCRE library can handle either
    674 EBCDIC, or UTF-8, but not both. To support both in the same compiled library
    675 would need different lookups depending on whether PCRE_UTF8 was set or not.
    676 This would make it impossible to use characters in switch/case statements,
    677 which would reduce performance. For a theoretical use (which nobody has asked
    678 for) in a minority area (EBCDIC platforms), this is not sensible. Any
    679 application that did need both could compile two versions of the library, using
    680 macros to give the functions distinct names. */
    681 
    682 #ifndef SUPPORT_UTF8
    683 
    684 /* UTF-8 support is not enabled; use the platform-dependent character literals
    685 so that PCRE works on both ASCII and EBCDIC platforms, in non-UTF-mode only. */
    686 
    687 #define CHAR_HT                     '\t'
    688 #define CHAR_VT                     '\v'
    689 #define CHAR_FF                     '\f'
    690 #define CHAR_CR                     '\r'
    691 #define CHAR_NL                     '\n'
    692 #define CHAR_BS                     '\b'
    693 #define CHAR_BEL                    '\a'
    694 #ifdef EBCDIC
    695 #define CHAR_ESC                    '\047'
    696 #define CHAR_DEL                    '\007'
    697 #else
    698 #define CHAR_ESC                    '\033'
    699 #define CHAR_DEL                    '\177'
    700 #endif
    701 
    702 #define CHAR_SPACE                  ' '
    703 #define CHAR_EXCLAMATION_MARK       '!'
    704 #define CHAR_QUOTATION_MARK         '"'
    705 #define CHAR_NUMBER_SIGN            '#'
    706 #define CHAR_DOLLAR_SIGN            '$'
    707 #define CHAR_PERCENT_SIGN           '%'
    708 #define CHAR_AMPERSAND              '&'
    709 #define CHAR_APOSTROPHE             '\''
    710 #define CHAR_LEFT_PARENTHESIS       '('
    711 #define CHAR_RIGHT_PARENTHESIS      ')'
    712 #define CHAR_ASTERISK               '*'
    713 #define CHAR_PLUS                   '+'
    714 #define CHAR_COMMA                  ','
    715 #define CHAR_MINUS                  '-'
    716 #define CHAR_DOT                    '.'
    717 #define CHAR_SLASH                  '/'
    718 #define CHAR_0                      '0'
    719 #define CHAR_1                      '1'
    720 #define CHAR_2                      '2'
    721 #define CHAR_3                      '3'
    722 #define CHAR_4                      '4'
    723 #define CHAR_5                      '5'
    724 #define CHAR_6                      '6'
    725 #define CHAR_7                      '7'
    726 #define CHAR_8                      '8'
    727 #define CHAR_9                      '9'
    728 #define CHAR_COLON                  ':'
    729 #define CHAR_SEMICOLON              ';'
    730 #define CHAR_LESS_THAN_SIGN         '<'
    731 #define CHAR_EQUALS_SIGN            '='
    732 #define CHAR_GREATER_THAN_SIGN      '>'
    733 #define CHAR_QUESTION_MARK          '?'
    734 #define CHAR_COMMERCIAL_AT          '@'
    735 #define CHAR_A                      'A'
    736 #define CHAR_B                      'B'
    737 #define CHAR_C                      'C'
    738 #define CHAR_D                      'D'
    739 #define CHAR_E                      'E'
    740 #define CHAR_F                      'F'
    741 #define CHAR_G                      'G'
    742 #define CHAR_H                      'H'
    743 #define CHAR_I                      'I'
    744 #define CHAR_J                      'J'
    745 #define CHAR_K                      'K'
    746 #define CHAR_L                      'L'
    747 #define CHAR_M                      'M'
    748 #define CHAR_N                      'N'
    749 #define CHAR_O                      'O'
    750 #define CHAR_P                      'P'
    751 #define CHAR_Q                      'Q'
    752 #define CHAR_R                      'R'
    753 #define CHAR_S                      'S'
    754 #define CHAR_T                      'T'
    755 #define CHAR_U                      'U'
    756 #define CHAR_V                      'V'
    757 #define CHAR_W                      'W'
    758 #define CHAR_X                      'X'
    759 #define CHAR_Y                      'Y'
    760 #define CHAR_Z                      'Z'
    761 #define CHAR_LEFT_SQUARE_BRACKET    '['
    762 #define CHAR_BACKSLASH              '\\'
    763 #define CHAR_RIGHT_SQUARE_BRACKET   ']'
    764 #define CHAR_CIRCUMFLEX_ACCENT      '^'
    765 #define CHAR_UNDERSCORE             '_'
    766 #define CHAR_GRAVE_ACCENT           '`'
    767 #define CHAR_a                      'a'
    768 #define CHAR_b                      'b'
    769 #define CHAR_c                      'c'
    770 #define CHAR_d                      'd'
    771 #define CHAR_e                      'e'
    772 #define CHAR_f                      'f'
    773 #define CHAR_g                      'g'
    774 #define CHAR_h                      'h'
    775 #define CHAR_i                      'i'
    776 #define CHAR_j                      'j'
    777 #define CHAR_k                      'k'
    778 #define CHAR_l                      'l'
    779 #define CHAR_m                      'm'
    780 #define CHAR_n                      'n'
    781 #define CHAR_o                      'o'
    782 #define CHAR_p                      'p'
    783 #define CHAR_q                      'q'
    784 #define CHAR_r                      'r'
    785 #define CHAR_s                      's'
    786 #define CHAR_t                      't'
    787 #define CHAR_u                      'u'
    788 #define CHAR_v                      'v'
    789 #define CHAR_w                      'w'
    790 #define CHAR_x                      'x'
    791 #define CHAR_y                      'y'
    792 #define CHAR_z                      'z'
    793 #define CHAR_LEFT_CURLY_BRACKET     '{'
    794 #define CHAR_VERTICAL_LINE          '|'
    795 #define CHAR_RIGHT_CURLY_BRACKET    '}'
    796 #define CHAR_TILDE                  '~'
    797 
    798 #define STR_HT                      "\t"
    799 #define STR_VT                      "\v"
    800 #define STR_FF                      "\f"
    801 #define STR_CR                      "\r"
    802 #define STR_NL                      "\n"
    803 #define STR_BS                      "\b"
    804 #define STR_BEL                     "\a"
    805 #ifdef EBCDIC
    806 #define STR_ESC                     "\047"
    807 #define STR_DEL                     "\007"
    808 #else
    809 #define STR_ESC                     "\033"
    810 #define STR_DEL                     "\177"
    811 #endif
    812 
    813 #define STR_SPACE                   " "
    814 #define STR_EXCLAMATION_MARK        "!"
    815 #define STR_QUOTATION_MARK          "\""
    816 #define STR_NUMBER_SIGN             "#"
    817 #define STR_DOLLAR_SIGN             "$"
    818 #define STR_PERCENT_SIGN            "%"
    819 #define STR_AMPERSAND               "&"
    820 #define STR_APOSTROPHE              "'"
    821 #define STR_LEFT_PARENTHESIS        "("
    822 #define STR_RIGHT_PARENTHESIS       ")"
    823 #define STR_ASTERISK                "*"
    824 #define STR_PLUS                    "+"
    825 #define STR_COMMA                   ","
    826 #define STR_MINUS                   "-"
    827 #define STR_DOT                     "."
    828 #define STR_SLASH                   "/"
    829 #define STR_0                       "0"
    830 #define STR_1                       "1"
    831 #define STR_2                       "2"
    832 #define STR_3                       "3"
    833 #define STR_4                       "4"
    834 #define STR_5                       "5"
    835 #define STR_6                       "6"
    836 #define STR_7                       "7"
    837 #define STR_8                       "8"
    838 #define STR_9                       "9"
    839 #define STR_COLON                   ":"
    840 #define STR_SEMICOLON               ";"
    841 #define STR_LESS_THAN_SIGN          "<"
    842 #define STR_EQUALS_SIGN             "="
    843 #define STR_GREATER_THAN_SIGN       ">"
    844 #define STR_QUESTION_MARK           "?"
    845 #define STR_COMMERCIAL_AT           "@"
    846 #define STR_A                       "A"
    847 #define STR_B                       "B"
    848 #define STR_C                       "C"
    849 #define STR_D                       "D"
    850 #define STR_E                       "E"
    851 #define STR_F                       "F"
    852 #define STR_G                       "G"
    853 #define STR_H                       "H"
    854 #define STR_I                       "I"
    855 #define STR_J                       "J"
    856 #define STR_K                       "K"
    857 #define STR_L                       "L"
    858 #define STR_M                       "M"
    859 #define STR_N                       "N"
    860 #define STR_O                       "O"
    861 #define STR_P                       "P"
    862 #define STR_Q                       "Q"
    863 #define STR_R                       "R"
    864 #define STR_S                       "S"
    865 #define STR_T                       "T"
    866 #define STR_U                       "U"
    867 #define STR_V                       "V"
    868 #define STR_W                       "W"
    869 #define STR_X                       "X"
    870 #define STR_Y                       "Y"
    871 #define STR_Z                       "Z"
    872 #define STR_LEFT_SQUARE_BRACKET     "["
    873 #define STR_BACKSLASH               "\\"
    874 #define STR_RIGHT_SQUARE_BRACKET    "]"
    875 #define STR_CIRCUMFLEX_ACCENT       "^"
    876 #define STR_UNDERSCORE              "_"
    877 #define STR_GRAVE_ACCENT            "`"
    878 #define STR_a                       "a"
    879 #define STR_b                       "b"
    880 #define STR_c                       "c"
    881 #define STR_d                       "d"
    882 #define STR_e                       "e"
    883 #define STR_f                       "f"
    884 #define STR_g                       "g"
    885 #define STR_h                       "h"
    886 #define STR_i                       "i"
    887 #define STR_j                       "j"
    888 #define STR_k                       "k"
    889 #define STR_l                       "l"
    890 #define STR_m                       "m"
    891 #define STR_n                       "n"
    892 #define STR_o                       "o"
    893 #define STR_p                       "p"
    894 #define STR_q                       "q"
    895 #define STR_r                       "r"
    896 #define STR_s                       "s"
    897 #define STR_t                       "t"
    898 #define STR_u                       "u"
    899 #define STR_v                       "v"
    900 #define STR_w                       "w"
    901 #define STR_x                       "x"
    902 #define STR_y                       "y"
    903 #define STR_z                       "z"
    904 #define STR_LEFT_CURLY_BRACKET      "{"
    905 #define STR_VERTICAL_LINE           "|"
    906 #define STR_RIGHT_CURLY_BRACKET     "}"
    907 #define STR_TILDE                   "~"
    908 
    909 #define STRING_ACCEPT0              "ACCEPT\0"
    910 #define STRING_COMMIT0              "COMMIT\0"
    911 #define STRING_F0                   "F\0"
    912 #define STRING_FAIL0                "FAIL\0"
    913 #define STRING_MARK0                "MARK\0"
    914 #define STRING_PRUNE0               "PRUNE\0"
    915 #define STRING_SKIP0                "SKIP\0"
    916 #define STRING_THEN                 "THEN"
    917 
    918 #define STRING_alpha0               "alpha\0"
    919 #define STRING_lower0               "lower\0"
    920 #define STRING_upper0               "upper\0"
    921 #define STRING_alnum0               "alnum\0"
    922 #define STRING_ascii0               "ascii\0"
    923 #define STRING_blank0               "blank\0"
    924 #define STRING_cntrl0               "cntrl\0"
    925 #define STRING_digit0               "digit\0"
    926 #define STRING_graph0               "graph\0"
    927 #define STRING_print0               "print\0"
    928 #define STRING_punct0               "punct\0"
    929 #define STRING_space0               "space\0"
    930 #define STRING_word0                "word\0"
    931 #define STRING_xdigit               "xdigit"
    932 
    933 #define STRING_DEFINE               "DEFINE"
    934 
    935 #define STRING_CR_RIGHTPAR             "CR)"
    936 #define STRING_LF_RIGHTPAR             "LF)"
    937 #define STRING_CRLF_RIGHTPAR           "CRLF)"
    938 #define STRING_ANY_RIGHTPAR            "ANY)"
    939 #define STRING_ANYCRLF_RIGHTPAR        "ANYCRLF)"
    940 #define STRING_BSR_ANYCRLF_RIGHTPAR    "BSR_ANYCRLF)"
    941 #define STRING_BSR_UNICODE_RIGHTPAR    "BSR_UNICODE)"
    942 #define STRING_UTF8_RIGHTPAR           "UTF8)"
    943 #define STRING_UCP_RIGHTPAR            "UCP)"
    944 #define STRING_NO_START_OPT_RIGHTPAR   "NO_START_OPT)"
    945 
    946 #else  /* SUPPORT_UTF8 */
    947 
    948 /* UTF-8 support is enabled; always use UTF-8 (=ASCII) character codes. This
    949 works in both modes non-EBCDIC platforms, and on EBCDIC platforms in UTF-8 mode
    950 only. */
    951 
    952 #define CHAR_HT                     '\011'
    953 #define CHAR_VT                     '\013'
    954 #define CHAR_FF                     '\014'
    955 #define CHAR_CR                     '\015'
    956 #define CHAR_NL                     '\012'
    957 #define CHAR_BS                     '\010'
    958 #define CHAR_BEL                    '\007'
    959 #define CHAR_ESC                    '\033'
    960 #define CHAR_DEL                    '\177'
    961 
    962 #define CHAR_SPACE                  '\040'
    963 #define CHAR_EXCLAMATION_MARK       '\041'
    964 #define CHAR_QUOTATION_MARK         '\042'
    965 #define CHAR_NUMBER_SIGN            '\043'
    966 #define CHAR_DOLLAR_SIGN            '\044'
    967 #define CHAR_PERCENT_SIGN           '\045'
    968 #define CHAR_AMPERSAND              '\046'
    969 #define CHAR_APOSTROPHE             '\047'
    970 #define CHAR_LEFT_PARENTHESIS       '\050'
    971 #define CHAR_RIGHT_PARENTHESIS      '\051'
    972 #define CHAR_ASTERISK               '\052'
    973 #define CHAR_PLUS                   '\053'
    974 #define CHAR_COMMA                  '\054'
    975 #define CHAR_MINUS                  '\055'
    976 #define CHAR_DOT                    '\056'
    977 #define CHAR_SLASH                  '\057'
    978 #define CHAR_0                      '\060'
    979 #define CHAR_1                      '\061'
    980 #define CHAR_2                      '\062'
    981 #define CHAR_3                      '\063'
    982 #define CHAR_4                      '\064'
    983 #define CHAR_5                      '\065'
    984 #define CHAR_6                      '\066'
    985 #define CHAR_7                      '\067'
    986 #define CHAR_8                      '\070'
    987 #define CHAR_9                      '\071'
    988 #define CHAR_COLON                  '\072'
    989 #define CHAR_SEMICOLON              '\073'
    990 #define CHAR_LESS_THAN_SIGN         '\074'
    991 #define CHAR_EQUALS_SIGN            '\075'
    992 #define CHAR_GREATER_THAN_SIGN      '\076'
    993 #define CHAR_QUESTION_MARK          '\077'
    994 #define CHAR_COMMERCIAL_AT          '\100'
    995 #define CHAR_A                      '\101'
    996 #define CHAR_B                      '\102'
    997 #define CHAR_C                      '\103'
    998 #define CHAR_D                      '\104'
    999 #define CHAR_E                      '\105'
   1000 #define CHAR_F                      '\106'
   1001 #define CHAR_G                      '\107'
   1002 #define CHAR_H                      '\110'
   1003 #define CHAR_I                      '\111'
   1004 #define CHAR_J                      '\112'
   1005 #define CHAR_K                      '\113'
   1006 #define CHAR_L                      '\114'
   1007 #define CHAR_M                      '\115'
   1008 #define CHAR_N                      '\116'
   1009 #define CHAR_O                      '\117'
   1010 #define CHAR_P                      '\120'
   1011 #define CHAR_Q                      '\121'
   1012 #define CHAR_R                      '\122'
   1013 #define CHAR_S                      '\123'
   1014 #define CHAR_T                      '\124'
   1015 #define CHAR_U                      '\125'
   1016 #define CHAR_V                      '\126'
   1017 #define CHAR_W                      '\127'
   1018 #define CHAR_X                      '\130'
   1019 #define CHAR_Y                      '\131'
   1020 #define CHAR_Z                      '\132'
   1021 #define CHAR_LEFT_SQUARE_BRACKET    '\133'
   1022 #define CHAR_BACKSLASH              '\134'
   1023 #define CHAR_RIGHT_SQUARE_BRACKET   '\135'
   1024 #define CHAR_CIRCUMFLEX_ACCENT      '\136'
   1025 #define CHAR_UNDERSCORE             '\137'
   1026 #define CHAR_GRAVE_ACCENT           '\140'
   1027 #define CHAR_a                      '\141'
   1028 #define CHAR_b                      '\142'
   1029 #define CHAR_c                      '\143'
   1030 #define CHAR_d                      '\144'
   1031 #define CHAR_e                      '\145'
   1032 #define CHAR_f                      '\146'
   1033 #define CHAR_g                      '\147'
   1034 #define CHAR_h                      '\150'
   1035 #define CHAR_i                      '\151'
   1036 #define CHAR_j                      '\152'
   1037 #define CHAR_k                      '\153'
   1038 #define CHAR_l                      '\154'
   1039 #define CHAR_m                      '\155'
   1040 #define CHAR_n                      '\156'
   1041 #define CHAR_o                      '\157'
   1042 #define CHAR_p                      '\160'
   1043 #define CHAR_q                      '\161'
   1044 #define CHAR_r                      '\162'
   1045 #define CHAR_s                      '\163'
   1046 #define CHAR_t                      '\164'
   1047 #define CHAR_u                      '\165'
   1048 #define CHAR_v                      '\166'
   1049 #define CHAR_w                      '\167'
   1050 #define CHAR_x                      '\170'
   1051 #define CHAR_y                      '\171'
   1052 #define CHAR_z                      '\172'
   1053 #define CHAR_LEFT_CURLY_BRACKET     '\173'
   1054 #define CHAR_VERTICAL_LINE          '\174'
   1055 #define CHAR_RIGHT_CURLY_BRACKET    '\175'
   1056 #define CHAR_TILDE                  '\176'
   1057 
   1058 #define STR_HT                      "\011"
   1059 #define STR_VT                      "\013"
   1060 #define STR_FF                      "\014"
   1061 #define STR_CR                      "\015"
   1062 #define STR_NL                      "\012"
   1063 #define STR_BS                      "\010"
   1064 #define STR_BEL                     "\007"
   1065 #define STR_ESC                     "\033"
   1066 #define STR_DEL                     "\177"
   1067 
   1068 #define STR_SPACE                   "\040"
   1069 #define STR_EXCLAMATION_MARK        "\041"
   1070 #define STR_QUOTATION_MARK          "\042"
   1071 #define STR_NUMBER_SIGN             "\043"
   1072 #define STR_DOLLAR_SIGN             "\044"
   1073 #define STR_PERCENT_SIGN            "\045"
   1074 #define STR_AMPERSAND               "\046"
   1075 #define STR_APOSTROPHE              "\047"
   1076 #define STR_LEFT_PARENTHESIS        "\050"
   1077 #define STR_RIGHT_PARENTHESIS       "\051"
   1078 #define STR_ASTERISK                "\052"
   1079 #define STR_PLUS                    "\053"
   1080 #define STR_COMMA                   "\054"
   1081 #define STR_MINUS                   "\055"
   1082 #define STR_DOT                     "\056"
   1083 #define STR_SLASH                   "\057"
   1084 #define STR_0                       "\060"
   1085 #define STR_1                       "\061"
   1086 #define STR_2                       "\062"
   1087 #define STR_3                       "\063"
   1088 #define STR_4                       "\064"
   1089 #define STR_5                       "\065"
   1090 #define STR_6                       "\066"
   1091 #define STR_7                       "\067"
   1092 #define STR_8                       "\070"
   1093 #define STR_9                       "\071"
   1094 #define STR_COLON                   "\072"
   1095 #define STR_SEMICOLON               "\073"
   1096 #define STR_LESS_THAN_SIGN          "\074"
   1097 #define STR_EQUALS_SIGN             "\075"
   1098 #define STR_GREATER_THAN_SIGN       "\076"
   1099 #define STR_QUESTION_MARK           "\077"
   1100 #define STR_COMMERCIAL_AT           "\100"
   1101 #define STR_A                       "\101"
   1102 #define STR_B                       "\102"
   1103 #define STR_C                       "\103"
   1104 #define STR_D                       "\104"
   1105 #define STR_E                       "\105"
   1106 #define STR_F                       "\106"
   1107 #define STR_G                       "\107"
   1108 #define STR_H                       "\110"
   1109 #define STR_I                       "\111"
   1110 #define STR_J                       "\112"
   1111 #define STR_K                       "\113"
   1112 #define STR_L                       "\114"
   1113 #define STR_M                       "\115"
   1114 #define STR_N                       "\116"
   1115 #define STR_O                       "\117"
   1116 #define STR_P                       "\120"
   1117 #define STR_Q                       "\121"
   1118 #define STR_R                       "\122"
   1119 #define STR_S                       "\123"
   1120 #define STR_T                       "\124"
   1121 #define STR_U                       "\125"
   1122 #define STR_V                       "\126"
   1123 #define STR_W                       "\127"
   1124 #define STR_X                       "\130"
   1125 #define STR_Y                       "\131"
   1126 #define STR_Z                       "\132"
   1127 #define STR_LEFT_SQUARE_BRACKET     "\133"
   1128 #define STR_BACKSLASH               "\134"
   1129 #define STR_RIGHT_SQUARE_BRACKET    "\135"
   1130 #define STR_CIRCUMFLEX_ACCENT       "\136"
   1131 #define STR_UNDERSCORE              "\137"
   1132 #define STR_GRAVE_ACCENT            "\140"
   1133 #define STR_a                       "\141"
   1134 #define STR_b                       "\142"
   1135 #define STR_c                       "\143"
   1136 #define STR_d                       "\144"
   1137 #define STR_e                       "\145"
   1138 #define STR_f                       "\146"
   1139 #define STR_g                       "\147"
   1140 #define STR_h                       "\150"
   1141 #define STR_i                       "\151"
   1142 #define STR_j                       "\152"
   1143 #define STR_k                       "\153"
   1144 #define STR_l                       "\154"
   1145 #define STR_m                       "\155"
   1146 #define STR_n                       "\156"
   1147 #define STR_o                       "\157"
   1148 #define STR_p                       "\160"
   1149 #define STR_q                       "\161"
   1150 #define STR_r                       "\162"
   1151 #define STR_s                       "\163"
   1152 #define STR_t                       "\164"
   1153 #define STR_u                       "\165"
   1154 #define STR_v                       "\166"
   1155 #define STR_w                       "\167"
   1156 #define STR_x                       "\170"
   1157 #define STR_y                       "\171"
   1158 #define STR_z                       "\172"
   1159 #define STR_LEFT_CURLY_BRACKET      "\173"
   1160 #define STR_VERTICAL_LINE           "\174"
   1161 #define STR_RIGHT_CURLY_BRACKET     "\175"
   1162 #define STR_TILDE                   "\176"
   1163 
   1164 #define STRING_ACCEPT0              STR_A STR_C STR_C STR_E STR_P STR_T "\0"
   1165 #define STRING_COMMIT0              STR_C STR_O STR_M STR_M STR_I STR_T "\0"
   1166 #define STRING_F0                   STR_F "\0"
   1167 #define STRING_FAIL0                STR_F STR_A STR_I STR_L "\0"
   1168 #define STRING_MARK0                STR_M STR_A STR_R STR_K "\0"
   1169 #define STRING_PRUNE0               STR_P STR_R STR_U STR_N STR_E "\0"
   1170 #define STRING_SKIP0                STR_S STR_K STR_I STR_P "\0"
   1171 #define STRING_THEN                 STR_T STR_H STR_E STR_N
   1172 
   1173 #define STRING_alpha0               STR_a STR_l STR_p STR_h STR_a "\0"
   1174 #define STRING_lower0               STR_l STR_o STR_w STR_e STR_r "\0"
   1175 #define STRING_upper0               STR_u STR_p STR_p STR_e STR_r "\0"
   1176 #define STRING_alnum0               STR_a STR_l STR_n STR_u STR_m "\0"
   1177 #define STRING_ascii0               STR_a STR_s STR_c STR_i STR_i "\0"
   1178 #define STRING_blank0               STR_b STR_l STR_a STR_n STR_k "\0"
   1179 #define STRING_cntrl0               STR_c STR_n STR_t STR_r STR_l "\0"
   1180 #define STRING_digit0               STR_d STR_i STR_g STR_i STR_t "\0"
   1181 #define STRING_graph0               STR_g STR_r STR_a STR_p STR_h "\0"
   1182 #define STRING_print0               STR_p STR_r STR_i STR_n STR_t "\0"
   1183 #define STRING_punct0               STR_p STR_u STR_n STR_c STR_t "\0"
   1184 #define STRING_space0               STR_s STR_p STR_a STR_c STR_e "\0"
   1185 #define STRING_word0                STR_w STR_o STR_r STR_d       "\0"
   1186 #define STRING_xdigit               STR_x STR_d STR_i STR_g STR_i STR_t
   1187 
   1188 #define STRING_DEFINE               STR_D STR_E STR_F STR_I STR_N STR_E
   1189 
   1190 #define STRING_CR_RIGHTPAR             STR_C STR_R STR_RIGHT_PARENTHESIS
   1191 #define STRING_LF_RIGHTPAR             STR_L STR_F STR_RIGHT_PARENTHESIS
   1192 #define STRING_CRLF_RIGHTPAR           STR_C STR_R STR_L STR_F STR_RIGHT_PARENTHESIS
   1193 #define STRING_ANY_RIGHTPAR            STR_A STR_N STR_Y STR_RIGHT_PARENTHESIS
   1194 #define STRING_ANYCRLF_RIGHTPAR        STR_A STR_N STR_Y STR_C STR_R STR_L STR_F STR_RIGHT_PARENTHESIS
   1195 #define STRING_BSR_ANYCRLF_RIGHTPAR    STR_B STR_S STR_R STR_UNDERSCORE STR_A STR_N STR_Y STR_C STR_R STR_L STR_F STR_RIGHT_PARENTHESIS
   1196 #define STRING_BSR_UNICODE_RIGHTPAR    STR_B STR_S STR_R STR_UNDERSCORE STR_U STR_N STR_I STR_C STR_O STR_D STR_E STR_RIGHT_PARENTHESIS
   1197 #define STRING_UTF8_RIGHTPAR           STR_U STR_T STR_F STR_8 STR_RIGHT_PARENTHESIS
   1198 #define STRING_UCP_RIGHTPAR            STR_U STR_C STR_P STR_RIGHT_PARENTHESIS
   1199 #define STRING_NO_START_OPT_RIGHTPAR   STR_N STR_O STR_UNDERSCORE STR_S STR_T STR_A STR_R STR_T STR_UNDERSCORE STR_O STR_P STR_T STR_RIGHT_PARENTHESIS
   1200 
   1201 #endif  /* SUPPORT_UTF8 */
   1202 
   1203 /* Escape items that are just an encoding of a particular data value. */
   1204 
   1205 #ifndef ESC_e
   1206 #define ESC_e CHAR_ESC
   1207 #endif
   1208 
   1209 #ifndef ESC_f
   1210 #define ESC_f CHAR_FF
   1211 #endif
   1212 
   1213 #ifndef ESC_n
   1214 #define ESC_n CHAR_NL
   1215 #endif
   1216 
   1217 #ifndef ESC_r
   1218 #define ESC_r CHAR_CR
   1219 #endif
   1220 
   1221 /* We can't officially use ESC_t because it is a POSIX reserved identifier
   1222 (presumably because of all the others like size_t). */
   1223 
   1224 #ifndef ESC_tee
   1225 #define ESC_tee CHAR_HT
   1226 #endif
   1227 
   1228 /* Codes for different types of Unicode property */
   1229 
   1230 #define PT_ANY        0    /* Any property - matches all chars */
   1231 #define PT_LAMP       1    /* L& - the union of Lu, Ll, Lt */
   1232 #define PT_GC         2    /* Specified general characteristic (e.g. L) */
   1233 #define PT_PC         3    /* Specified particular characteristic (e.g. Lu) */
   1234 #define PT_SC         4    /* Script (e.g. Han) */
   1235 #define PT_ALNUM      5    /* Alphanumeric - the union of L and N */
   1236 #define PT_SPACE      6    /* Perl space - Z plus 9,10,12,13 */
   1237 #define PT_PXSPACE    7    /* POSIX space - Z plus 9,10,11,12,13 */
   1238 #define PT_WORD       8    /* Word - L plus N plus underscore */
   1239 
   1240 /* Flag bits and data types for the extended class (OP_XCLASS) for classes that
   1241 contain UTF-8 characters with values greater than 255. */
   1242 
   1243 #define XCL_NOT    0x01    /* Flag: this is a negative class */
   1244 #define XCL_MAP    0x02    /* Flag: a 32-byte map is present */
   1245 
   1246 #define XCL_END       0    /* Marks end of individual items */
   1247 #define XCL_SINGLE    1    /* Single item (one multibyte char) follows */
   1248 #define XCL_RANGE     2    /* A range (two multibyte chars) follows */
   1249 #define XCL_PROP      3    /* Unicode property (2-byte property code follows) */
   1250 #define XCL_NOTPROP   4    /* Unicode inverted property (ditto) */
   1251 
   1252 /* These are escaped items that aren't just an encoding of a particular data
   1253 value such as \n. They must have non-zero values, as check_escape() returns
   1254 their negation. Also, they must appear in the same order as in the opcode
   1255 definitions below, up to ESC_z. There's a dummy for OP_ALLANY because it
   1256 corresponds to "." in DOTALL mode rather than an escape sequence. It is also
   1257 used for [^] in JavaScript compatibility mode. In non-DOTALL mode, "." behaves
   1258 like \N.
   1259 
   1260 The special values ESC_DU, ESC_du, etc. are used instead of ESC_D, ESC_d, etc.
   1261 when PCRE_UCP is set, when replacement of \d etc by \p sequences is required.
   1262 They must be contiguous, and remain in order so that the replacements can be
   1263 looked up from a table.
   1264 
   1265 The final escape must be ESC_REF as subsequent values are used for
   1266 backreferences (\1, \2, \3, etc). There are two tests in the code for an escape
   1267 greater than ESC_b and less than ESC_Z to detect the types that may be
   1268 repeated. These are the types that consume characters. If any new escapes are
   1269 put in between that don't consume a character, that code will have to change.
   1270 */
   1271 
   1272 enum { ESC_A = 1, ESC_G, ESC_K, ESC_B, ESC_b, ESC_D, ESC_d, ESC_S, ESC_s,
   1273        ESC_W, ESC_w, ESC_N, ESC_dum, ESC_C, ESC_P, ESC_p, ESC_R, ESC_H,
   1274        ESC_h, ESC_V, ESC_v, ESC_X, ESC_Z, ESC_z,
   1275        ESC_E, ESC_Q, ESC_g, ESC_k,
   1276        ESC_DU, ESC_du, ESC_SU, ESC_su, ESC_WU, ESC_wu,
   1277        ESC_REF };
   1278 
   1279 /* Opcode table: Starting from 1 (i.e. after OP_END), the values up to
   1280 OP_EOD must correspond in order to the list of escapes immediately above.
   1281 
   1282 *** NOTE NOTE NOTE *** Whenever this list is updated, the two macro definitions
   1283 that follow must also be updated to match. There are also tables called
   1284 "coptable" and "poptable" in pcre_dfa_exec.c that must be updated. */
   1285 
   1286 enum {
   1287   OP_END,            /* 0 End of pattern */
   1288 
   1289   /* Values corresponding to backslashed metacharacters */
   1290 
   1291   OP_SOD,            /* 1 Start of data: \A */
   1292   OP_SOM,            /* 2 Start of match (subject + offset): \G */
   1293   OP_SET_SOM,        /* 3 Set start of match (\K) */
   1294   OP_NOT_WORD_BOUNDARY,  /*  4 \B */
   1295   OP_WORD_BOUNDARY,      /*  5 \b */
   1296   OP_NOT_DIGIT,          /*  6 \D */
   1297   OP_DIGIT,              /*  7 \d */
   1298   OP_NOT_WHITESPACE,     /*  8 \S */
   1299   OP_WHITESPACE,         /*  9 \s */
   1300   OP_NOT_WORDCHAR,       /* 10 \W */
   1301   OP_WORDCHAR,           /* 11 \w */
   1302   OP_ANY,            /* 12 Match any character except newline */
   1303   OP_ALLANY,         /* 13 Match any character */
   1304   OP_ANYBYTE,        /* 14 Match any byte (\C); different to OP_ANY for UTF-8 */
   1305   OP_NOTPROP,        /* 15 \P (not Unicode property) */
   1306   OP_PROP,           /* 16 \p (Unicode property) */
   1307   OP_ANYNL,          /* 17 \R (any newline sequence) */
   1308   OP_NOT_HSPACE,     /* 18 \H (not horizontal whitespace) */
   1309   OP_HSPACE,         /* 19 \h (horizontal whitespace) */
   1310   OP_NOT_VSPACE,     /* 20 \V (not vertical whitespace) */
   1311   OP_VSPACE,         /* 21 \v (vertical whitespace) */
   1312   OP_EXTUNI,         /* 22 \X (extended Unicode sequence */
   1313   OP_EODN,           /* 23 End of data or \n at end of data: \Z. */
   1314   OP_EOD,            /* 24 End of data: \z */
   1315 
   1316   OP_OPT,            /* 25 Set runtime options */
   1317   OP_CIRC,           /* 26 Start of line - varies with multiline switch */
   1318   OP_DOLL,           /* 27 End of line - varies with multiline switch */
   1319   OP_CHAR,           /* 28 Match one character, casefully */
   1320   OP_CHARNC,         /* 29 Match one character, caselessly */
   1321   OP_NOT,            /* 30 Match one character, not the following one */
   1322 
   1323   OP_STAR,           /* 31 The maximizing and minimizing versions of */
   1324   OP_MINSTAR,        /* 32 these six opcodes must come in pairs, with */
   1325   OP_PLUS,           /* 33 the minimizing one second. */
   1326   OP_MINPLUS,        /* 34 This first set applies to single characters.*/
   1327   OP_QUERY,          /* 35 */
   1328   OP_MINQUERY,       /* 36 */
   1329 
   1330   OP_UPTO,           /* 37 From 0 to n matches */
   1331   OP_MINUPTO,        /* 38 */
   1332   OP_EXACT,          /* 39 Exactly n matches */
   1333 
   1334   OP_POSSTAR,        /* 40 Possessified star */
   1335   OP_POSPLUS,        /* 41 Possessified plus */
   1336   OP_POSQUERY,       /* 42 Posesssified query */
   1337   OP_POSUPTO,        /* 43 Possessified upto */
   1338 
   1339   OP_NOTSTAR,        /* 44 The maximizing and minimizing versions of */
   1340   OP_NOTMINSTAR,     /* 45 these six opcodes must come in pairs, with */
   1341   OP_NOTPLUS,        /* 46 the minimizing one second. They must be in */
   1342   OP_NOTMINPLUS,     /* 47 exactly the same order as those above. */
   1343   OP_NOTQUERY,       /* 48 This set applies to "not" single characters. */
   1344   OP_NOTMINQUERY,    /* 49 */
   1345 
   1346   OP_NOTUPTO,        /* 50 From 0 to n matches */
   1347   OP_NOTMINUPTO,     /* 51 */
   1348   OP_NOTEXACT,       /* 52 Exactly n matches */
   1349 
   1350   OP_NOTPOSSTAR,     /* 53 Possessified versions */
   1351   OP_NOTPOSPLUS,     /* 54 */
   1352   OP_NOTPOSQUERY,    /* 55 */
   1353   OP_NOTPOSUPTO,     /* 56 */
   1354 
   1355   OP_TYPESTAR,       /* 57 The maximizing and minimizing versions of */
   1356   OP_TYPEMINSTAR,    /* 58 these six opcodes must come in pairs, with */
   1357   OP_TYPEPLUS,       /* 59 the minimizing one second. These codes must */
   1358   OP_TYPEMINPLUS,    /* 60 be in exactly the same order as those above. */
   1359   OP_TYPEQUERY,      /* 61 This set applies to character types such as \d */
   1360   OP_TYPEMINQUERY,   /* 62 */
   1361 
   1362   OP_TYPEUPTO,       /* 63 From 0 to n matches */
   1363   OP_TYPEMINUPTO,    /* 64 */
   1364   OP_TYPEEXACT,      /* 65 Exactly n matches */
   1365 
   1366   OP_TYPEPOSSTAR,    /* 66 Possessified versions */
   1367   OP_TYPEPOSPLUS,    /* 67 */
   1368   OP_TYPEPOSQUERY,   /* 68 */
   1369   OP_TYPEPOSUPTO,    /* 69 */
   1370 
   1371   OP_CRSTAR,         /* 70 The maximizing and minimizing versions of */
   1372   OP_CRMINSTAR,      /* 71 all these opcodes must come in pairs, with */
   1373   OP_CRPLUS,         /* 72 the minimizing one second. These codes must */
   1374   OP_CRMINPLUS,      /* 73 be in exactly the same order as those above. */
   1375   OP_CRQUERY,        /* 74 These are for character classes and back refs */
   1376   OP_CRMINQUERY,     /* 75 */
   1377   OP_CRRANGE,        /* 76 These are different to the three sets above. */
   1378   OP_CRMINRANGE,     /* 77 */
   1379 
   1380   OP_CLASS,          /* 78 Match a character class, chars < 256 only */
   1381   OP_NCLASS,         /* 79 Same, but the bitmap was created from a negative
   1382                            class - the difference is relevant only when a UTF-8
   1383                            character > 255 is encountered. */
   1384 
   1385   OP_XCLASS,         /* 80 Extended class for handling UTF-8 chars within the
   1386                            class. This does both positive and negative. */
   1387 
   1388   OP_REF,            /* 81 Match a back reference */
   1389   OP_RECURSE,        /* 82 Match a numbered subpattern (possibly recursive) */
   1390   OP_CALLOUT,        /* 83 Call out to external function if provided */
   1391 
   1392   OP_ALT,            /* 84 Start of alternation */
   1393   OP_KET,            /* 85 End of group that doesn't have an unbounded repeat */
   1394   OP_KETRMAX,        /* 86 These two must remain together and in this */
   1395   OP_KETRMIN,        /* 87 order. They are for groups the repeat for ever. */
   1396 
   1397   /* The assertions must come before BRA, CBRA, ONCE, and COND.*/
   1398 
   1399   OP_ASSERT,         /* 88 Positive lookahead */
   1400   OP_ASSERT_NOT,     /* 89 Negative lookahead */
   1401   OP_ASSERTBACK,     /* 90 Positive lookbehind */
   1402   OP_ASSERTBACK_NOT, /* 91 Negative lookbehind */
   1403   OP_REVERSE,        /* 92 Move pointer back - used in lookbehind assertions */
   1404 
   1405   /* ONCE, BRA, CBRA, and COND must come after the assertions, with ONCE first,
   1406   as there's a test for >= ONCE for a subpattern that isn't an assertion. */
   1407 
   1408   OP_ONCE,           /* 93 Atomic group */
   1409   OP_BRA,            /* 94 Start of non-capturing bracket */
   1410   OP_CBRA,           /* 95 Start of capturing bracket */
   1411   OP_COND,           /* 96 Conditional group */
   1412 
   1413   /* These three must follow the previous three, in the same order. There's a
   1414   check for >= SBRA to distinguish the two sets. */
   1415 
   1416   OP_SBRA,           /* 97 Start of non-capturing bracket, check empty  */
   1417   OP_SCBRA,          /* 98 Start of capturing bracket, check empty */
   1418   OP_SCOND,          /* 99 Conditional group, check empty */
   1419 
   1420   /* The next two pairs must (respectively) be kept together. */
   1421 
   1422   OP_CREF,           /* 100 Used to hold a capture number as condition */
   1423   OP_NCREF,          /* 101 Same, but generaged by a name reference*/
   1424   OP_RREF,           /* 102 Used to hold a recursion number as condition */
   1425   OP_NRREF,          /* 103 Same, but generaged by a name reference*/
   1426   OP_DEF,            /* 104 The DEFINE condition */
   1427 
   1428   OP_BRAZERO,        /* 105 These two must remain together and in this */
   1429   OP_BRAMINZERO,     /* 106 order. */
   1430 
   1431   /* These are backtracking control verbs */
   1432 
   1433   OP_MARK,           /* 107 always has an argument */
   1434   OP_PRUNE,          /* 108 */
   1435   OP_PRUNE_ARG,      /* 109 same, but with argument */
   1436   OP_SKIP,           /* 110 */
   1437   OP_SKIP_ARG,       /* 111 same, but with argument */
   1438   OP_THEN,           /* 112 */
   1439   OP_THEN_ARG,       /* 113 same, but with argument */
   1440   OP_COMMIT,         /* 114 */
   1441 
   1442   /* These are forced failure and success verbs */
   1443 
   1444   OP_FAIL,           /* 115 */
   1445   OP_ACCEPT,         /* 116 */
   1446   OP_CLOSE,          /* 117 Used before OP_ACCEPT to close open captures */
   1447 
   1448   /* This is used to skip a subpattern with a {0} quantifier */
   1449 
   1450   OP_SKIPZERO,       /* 118 */
   1451 
   1452   /* This is not an opcode, but is used to check that tables indexed by opcode
   1453   are the correct length, in order to catch updating errors - there have been
   1454   some in the past. */
   1455 
   1456   OP_TABLE_LENGTH
   1457 };
   1458 
   1459 /* *** NOTE NOTE NOTE *** Whenever the list above is updated, the two macro
   1460 definitions that follow must also be updated to match. There are also tables
   1461 called "coptable" and "poptable" in pcre_dfa_exec.c that must be updated. */
   1462 
   1463 
   1464 /* This macro defines textual names for all the opcodes. These are used only
   1465 for debugging. The macro is referenced only in pcre_printint.c. */
   1466 
   1467 #define OP_NAME_LIST \
   1468   "End", "\\A", "\\G", "\\K", "\\B", "\\b", "\\D", "\\d",         \
   1469   "\\S", "\\s", "\\W", "\\w", "Any", "AllAny", "Anybyte",         \
   1470   "notprop", "prop", "\\R", "\\H", "\\h", "\\V", "\\v",           \
   1471   "extuni",  "\\Z", "\\z",                                        \
   1472   "Opt", "^", "$", "char", "charnc", "not",                       \
   1473   "*", "*?", "+", "+?", "?", "??", "{", "{", "{",                 \
   1474   "*+","++", "?+", "{",                                           \
   1475   "*", "*?", "+", "+?", "?", "??", "{", "{", "{",                 \
   1476   "*+","++", "?+", "{",                                           \
   1477   "*", "*?", "+", "+?", "?", "??", "{", "{", "{",                 \
   1478   "*+","++", "?+", "{",                                           \
   1479   "*", "*?", "+", "+?", "?", "??", "{", "{",                      \
   1480   "class", "nclass", "xclass", "Ref", "Recurse", "Callout",       \
   1481   "Alt", "Ket", "KetRmax", "KetRmin", "Assert", "Assert not",     \
   1482   "AssertB", "AssertB not", "Reverse",                            \
   1483   "Once", "Bra", "CBra", "Cond", "SBra", "SCBra", "SCond",        \
   1484   "Cond ref", "Cond nref", "Cond rec", "Cond nrec", "Cond def",   \
   1485   "Brazero", "Braminzero",                                        \
   1486   "*MARK", "*PRUNE", "*PRUNE", "*SKIP", "*SKIP",                  \
   1487   "*THEN", "*THEN", "*COMMIT", "*FAIL", "*ACCEPT",                \
   1488   "Close", "Skip zero"
   1489 
   1490 
   1491 /* This macro defines the length of fixed length operations in the compiled
   1492 regex. The lengths are used when searching for specific things, and also in the
   1493 debugging printing of a compiled regex. We use a macro so that it can be
   1494 defined close to the definitions of the opcodes themselves.
   1495 
   1496 As things have been extended, some of these are no longer fixed lenths, but are
   1497 minima instead. For example, the length of a single-character repeat may vary
   1498 in UTF-8 mode. The code that uses this table must know about such things. */
   1499 
   1500 #define OP_LENGTHS \
   1501   1,                             /* End                                    */ \
   1502   1, 1, 1, 1, 1,                 /* \A, \G, \K, \B, \b                     */ \
   1503   1, 1, 1, 1, 1, 1,              /* \D, \d, \S, \s, \W, \w                 */ \
   1504   1, 1, 1,                       /* Any, AllAny, Anybyte                   */ \
   1505   3, 3,                          /* \P, \p                                 */ \
   1506   1, 1, 1, 1, 1,                 /* \R, \H, \h, \V, \v                     */ \
   1507   1,                             /* \X                                     */ \
   1508   1, 1, 2, 1, 1,                 /* \Z, \z, Opt, ^, $                      */ \
   1509   2,                             /* Char  - the minimum length             */ \
   1510   2,                             /* Charnc  - the minimum length           */ \
   1511   2,                             /* not                                    */ \
   1512   /* Positive single-char repeats                            ** These are  */ \
   1513   2, 2, 2, 2, 2, 2,              /* *, *?, +, +?, ?, ??      ** minima in  */ \
   1514   4, 4, 4,                       /* upto, minupto, exact     ** UTF-8 mode */ \
   1515   2, 2, 2, 4,                    /* *+, ++, ?+, upto+                      */ \
   1516   /* Negative single-char repeats - only for chars < 256                   */ \
   1517   2, 2, 2, 2, 2, 2,              /* NOT *, *?, +, +?, ?, ??                */ \
   1518   4, 4, 4,                       /* NOT upto, minupto, exact               */ \
   1519   2, 2, 2, 4,                    /* Possessive *, +, ?, upto               */ \
   1520   /* Positive type repeats                                                 */ \
   1521   2, 2, 2, 2, 2, 2,              /* Type *, *?, +, +?, ?, ??               */ \
   1522   4, 4, 4,                       /* Type upto, minupto, exact              */ \
   1523   2, 2, 2, 4,                    /* Possessive *+, ++, ?+, upto+           */ \
   1524   /* Character class & ref repeats                                         */ \
   1525   1, 1, 1, 1, 1, 1,              /* *, *?, +, +?, ?, ??                    */ \
   1526   5, 5,                          /* CRRANGE, CRMINRANGE                    */ \
   1527  33,                             /* CLASS                                  */ \
   1528  33,                             /* NCLASS                                 */ \
   1529   0,                             /* XCLASS - variable length               */ \
   1530   3,                             /* REF                                    */ \
   1531   1+LINK_SIZE,                   /* RECURSE                                */ \
   1532   2+2*LINK_SIZE,                 /* CALLOUT                                */ \
   1533   1+LINK_SIZE,                   /* Alt                                    */ \
   1534   1+LINK_SIZE,                   /* Ket                                    */ \
   1535   1+LINK_SIZE,                   /* KetRmax                                */ \
   1536   1+LINK_SIZE,                   /* KetRmin                                */ \
   1537   1+LINK_SIZE,                   /* Assert                                 */ \
   1538   1+LINK_SIZE,                   /* Assert not                             */ \
   1539   1+LINK_SIZE,                   /* Assert behind                          */ \
   1540   1+LINK_SIZE,                   /* Assert behind not                      */ \
   1541   1+LINK_SIZE,                   /* Reverse                                */ \
   1542   1+LINK_SIZE,                   /* ONCE                                   */ \
   1543   1+LINK_SIZE,                   /* BRA                                    */ \
   1544   3+LINK_SIZE,                   /* CBRA                                   */ \
   1545   1+LINK_SIZE,                   /* COND                                   */ \
   1546   1+LINK_SIZE,                   /* SBRA                                   */ \
   1547   3+LINK_SIZE,                   /* SCBRA                                  */ \
   1548   1+LINK_SIZE,                   /* SCOND                                  */ \
   1549   3, 3,                          /* CREF, NCREF                            */ \
   1550   3, 3,                          /* RREF, NRREF                            */ \
   1551   1,                             /* DEF                                    */ \
   1552   1, 1,                          /* BRAZERO, BRAMINZERO                    */ \
   1553   3, 1, 3,                       /* MARK, PRUNE, PRUNE_ARG                 */ \
   1554   1, 3,                          /* SKIP, SKIP_ARG                         */ \
   1555   1+LINK_SIZE, 3+LINK_SIZE,      /* THEN, THEN_ARG                         */ \
   1556   1, 1, 1, 3, 1                  /* COMMIT, FAIL, ACCEPT, CLOSE, SKIPZERO  */
   1557 
   1558 
   1559 /* A magic value for OP_RREF and OP_NRREF to indicate the "any recursion"
   1560 condition. */
   1561 
   1562 #define RREF_ANY  0xffff
   1563 
   1564 /* Compile time error code numbers. They are given names so that they can more
   1565 easily be tracked. When a new number is added, the table called eint in
   1566 pcreposix.c must be updated. */
   1567 
   1568 enum { ERR0,  ERR1,  ERR2,  ERR3,  ERR4,  ERR5,  ERR6,  ERR7,  ERR8,  ERR9,
   1569        ERR10, ERR11, ERR12, ERR13, ERR14, ERR15, ERR16, ERR17, ERR18, ERR19,
   1570        ERR20, ERR21, ERR22, ERR23, ERR24, ERR25, ERR26, ERR27, ERR28, ERR29,
   1571        ERR30, ERR31, ERR32, ERR33, ERR34, ERR35, ERR36, ERR37, ERR38, ERR39,
   1572        ERR40, ERR41, ERR42, ERR43, ERR44, ERR45, ERR46, ERR47, ERR48, ERR49,
   1573        ERR50, ERR51, ERR52, ERR53, ERR54, ERR55, ERR56, ERR57, ERR58, ERR59,
   1574        ERR60, ERR61, ERR62, ERR63, ERR64, ERR65, ERR66, ERR67, ERR68,
   1575        ERRCOUNT };
   1576 
   1577 /* The real format of the start of the pcre block; the index of names and the
   1578 code vector run on as long as necessary after the end. We store an explicit
   1579 offset to the name table so that if a regex is compiled on one host, saved, and
   1580 then run on another where the size of pointers is different, all might still
   1581 be well. For the case of compiled-on-4 and run-on-8, we include an extra
   1582 pointer that is always NULL. For future-proofing, a few dummy fields were
   1583 originally included - even though you can never get this planning right - but
   1584 there is only one left now.
   1585 
   1586 NOTE NOTE NOTE:
   1587 Because people can now save and re-use compiled patterns, any additions to this
   1588 structure should be made at the end, and something earlier (e.g. a new
   1589 flag in the options or one of the dummy fields) should indicate that the new
   1590 fields are present. Currently PCRE always sets the dummy fields to zero.
   1591 NOTE NOTE NOTE
   1592 */
   1593 
   1594 typedef struct real_pcre {
   1595   pcre_uint32 magic_number;
   1596   pcre_uint32 size;               /* Total that was malloced */
   1597   pcre_uint32 options;            /* Public options */
   1598   pcre_uint16 flags;              /* Private flags */
   1599   pcre_uint16 dummy1;             /* For future use */
   1600   pcre_uint16 top_bracket;
   1601   pcre_uint16 top_backref;
   1602   pcre_uint16 first_byte;
   1603   pcre_uint16 req_byte;
   1604   pcre_uint16 name_table_offset;  /* Offset to name table that follows */
   1605   pcre_uint16 name_entry_size;    /* Size of any name items */
   1606   pcre_uint16 name_count;         /* Number of name items */
   1607   pcre_uint16 ref_count;          /* Reference count */
   1608 
   1609   const unsigned char *tables;    /* Pointer to tables or NULL for std */
   1610   const unsigned char *nullpad;   /* NULL padding */
   1611 } real_pcre;
   1612 
   1613 /* The format of the block used to store data from pcre_study(). The same
   1614 remark (see NOTE above) about extending this structure applies. */
   1615 
   1616 typedef struct pcre_study_data {
   1617   pcre_uint32 size;               /* Total that was malloced */
   1618   pcre_uint32 flags;              /* Private flags */
   1619   uschar start_bits[32];          /* Starting char bits */
   1620   pcre_uint32 minlength;          /* Minimum subject length */
   1621 } pcre_study_data;
   1622 
   1623 /* Structure for building a chain of open capturing subpatterns during
   1624 compiling, so that instructions to close them can be compiled when (*ACCEPT) is
   1625 encountered. This is also used to identify subpatterns that contain recursive
   1626 back references to themselves, so that they can be made atomic. */
   1627 
   1628 typedef struct open_capitem {
   1629   struct open_capitem *next;    /* Chain link */
   1630   pcre_uint16 number;           /* Capture number */
   1631   pcre_uint16 flag;             /* Set TRUE if recursive back ref */
   1632 } open_capitem;
   1633 
   1634 /* Structure for passing "static" information around between the functions
   1635 doing the compiling, so that they are thread-safe. */
   1636 
   1637 typedef struct compile_data {
   1638   const uschar *lcc;            /* Points to lower casing table */
   1639   const uschar *fcc;            /* Points to case-flipping table */
   1640   const uschar *cbits;          /* Points to character type table */
   1641   const uschar *ctypes;         /* Points to table of type maps */
   1642   const uschar *start_workspace;/* The start of working space */
   1643   const uschar *start_code;     /* The start of the compiled code */
   1644   const uschar *start_pattern;  /* The start of the pattern */
   1645   const uschar *end_pattern;    /* The end of the pattern */
   1646   open_capitem *open_caps;      /* Chain of open capture items */
   1647   uschar *hwm;                  /* High watermark of workspace */
   1648   uschar *name_table;           /* The name/number table */
   1649   int  names_found;             /* Number of entries so far */
   1650   int  name_entry_size;         /* Size of each entry */
   1651   int  bracount;                /* Count of capturing parens as we compile */
   1652   int  final_bracount;          /* Saved value after first pass */
   1653   int  top_backref;             /* Maximum back reference */
   1654   unsigned int backref_map;     /* Bitmap of low back refs */
   1655   int  external_options;        /* External (initial) options */
   1656   int  external_flags;          /* External flag bits to be set */
   1657   int  req_varyopt;             /* "After variable item" flag for reqbyte */
   1658   BOOL had_accept;              /* (*ACCEPT) encountered */
   1659   BOOL check_lookbehind;        /* Lookbehinds need later checking */
   1660   int  nltype;                  /* Newline type */
   1661   int  nllen;                   /* Newline string length */
   1662   uschar nl[4];                 /* Newline string when fixed length */
   1663 } compile_data;
   1664 
   1665 /* Structure for maintaining a chain of pointers to the currently incomplete
   1666 branches, for testing for left recursion. */
   1667 
   1668 typedef struct branch_chain {
   1669   struct branch_chain *outer;
   1670   uschar *current_branch;
   1671 } branch_chain;
   1672 
   1673 /* Structure for items in a linked list that represents an explicit recursive
   1674 call within the pattern. */
   1675 
   1676 typedef struct recursion_info {
   1677   struct recursion_info *prevrec; /* Previous recursion record (or NULL) */
   1678   int group_num;                /* Number of group that was called */
   1679   const uschar *after_call;     /* "Return value": points after the call in the expr */
   1680   int *offset_save;             /* Pointer to start of saved offsets */
   1681   int saved_max;                /* Number of saved offsets */
   1682   int save_offset_top;          /* Current value of offset_top */
   1683 } recursion_info;
   1684 
   1685 /* Structure for building a chain of data for holding the values of the subject
   1686 pointer at the start of each subpattern, so as to detect when an empty string
   1687 has been matched by a subpattern - to break infinite loops. */
   1688 
   1689 typedef struct eptrblock {
   1690   struct eptrblock *epb_prev;
   1691   USPTR epb_saved_eptr;
   1692 } eptrblock;
   1693 
   1694 
   1695 /* Structure for passing "static" information around between the functions
   1696 doing traditional NFA matching, so that they are thread-safe. */
   1697 
   1698 typedef struct match_data {
   1699   unsigned long int match_call_count;      /* As it says */
   1700   unsigned long int match_limit;           /* As it says */
   1701   unsigned long int match_limit_recursion; /* As it says */
   1702   int   *offset_vector;         /* Offset vector */
   1703   int    offset_end;            /* One past the end */
   1704   int    offset_max;            /* The maximum usable for return data */
   1705   int    nltype;                /* Newline type */
   1706   int    nllen;                 /* Newline string length */
   1707   int    name_count;            /* Number of names in name table */
   1708   int    name_entry_size;       /* Size of entry in names table */
   1709   uschar *name_table;           /* Table of names */
   1710   uschar nl[4];                 /* Newline string when fixed */
   1711   const uschar *lcc;            /* Points to lower casing table */
   1712   const uschar *ctypes;         /* Points to table of type maps */
   1713   BOOL   offset_overflow;       /* Set if too many extractions */
   1714   BOOL   notbol;                /* NOTBOL flag */
   1715   BOOL   noteol;                /* NOTEOL flag */
   1716   BOOL   utf8;                  /* UTF8 flag */
   1717   BOOL   jscript_compat;        /* JAVASCRIPT_COMPAT flag */
   1718   BOOL   use_ucp;               /* PCRE_UCP flag */
   1719   BOOL   endonly;               /* Dollar not before final \n */
   1720   BOOL   notempty;              /* Empty string match not wanted */
   1721   BOOL   notempty_atstart;      /* Empty string match at start not wanted */
   1722   BOOL   hitend;                /* Hit the end of the subject at some point */
   1723   BOOL   bsr_anycrlf;           /* \R is just any CRLF, not full Unicode */
   1724   const uschar *start_code;     /* For use when recursing */
   1725   USPTR  start_subject;         /* Start of the subject string */
   1726   USPTR  end_subject;           /* End of the subject string */
   1727   USPTR  start_match_ptr;       /* Start of matched string */
   1728   USPTR  end_match_ptr;         /* Subject position at end match */
   1729   USPTR  start_used_ptr;        /* Earliest consulted character */
   1730   int    partial;               /* PARTIAL options */
   1731   int    end_offset_top;        /* Highwater mark at end of match */
   1732   int    capture_last;          /* Most recent capture number */
   1733   int    start_offset;          /* The start offset value */
   1734   eptrblock *eptrchain;         /* Chain of eptrblocks for tail recursions */
   1735   int    eptrn;                 /* Next free eptrblock */
   1736   recursion_info *recursive;    /* Linked list of recursion data */
   1737   void  *callout_data;          /* To pass back to callouts */
   1738   const uschar *mark;           /* Mark pointer to pass back */
   1739 } match_data;
   1740 
   1741 /* A similar structure is used for the same purpose by the DFA matching
   1742 functions. */
   1743 
   1744 typedef struct dfa_match_data {
   1745   const uschar *start_code;     /* Start of the compiled pattern */
   1746   const uschar *start_subject;  /* Start of the subject string */
   1747   const uschar *end_subject;    /* End of subject string */
   1748   const uschar *start_used_ptr; /* Earliest consulted character */
   1749   const uschar *tables;         /* Character tables */
   1750   int   start_offset;           /* The start offset value */
   1751   int   moptions;               /* Match options */
   1752   int   poptions;               /* Pattern options */
   1753   int    nltype;                /* Newline type */
   1754   int    nllen;                 /* Newline string length */
   1755   uschar nl[4];                 /* Newline string when fixed */
   1756   void  *callout_data;          /* To pass back to callouts */
   1757 } dfa_match_data;
   1758 
   1759 /* Bit definitions for entries in the pcre_ctypes table. */
   1760 
   1761 #define ctype_space   0x01
   1762 #define ctype_letter  0x02
   1763 #define ctype_digit   0x04
   1764 #define ctype_xdigit  0x08
   1765 #define ctype_word    0x10   /* alphanumeric or '_' */
   1766 #define ctype_meta    0x80   /* regexp meta char or zero (end pattern) */
   1767 
   1768 /* Offsets for the bitmap tables in pcre_cbits. Each table contains a set
   1769 of bits for a class map. Some classes are built by combining these tables. */
   1770 
   1771 #define cbit_space     0      /* [:space:] or \s */
   1772 #define cbit_xdigit   32      /* [:xdigit:] */
   1773 #define cbit_digit    64      /* [:digit:] or \d */
   1774 #define cbit_upper    96      /* [:upper:] */
   1775 #define cbit_lower   128      /* [:lower:] */
   1776 #define cbit_word    160      /* [:word:] or \w */
   1777 #define cbit_graph   192      /* [:graph:] */
   1778 #define cbit_print   224      /* [:print:] */
   1779 #define cbit_punct   256      /* [:punct:] */
   1780 #define cbit_cntrl   288      /* [:cntrl:] */
   1781 #define cbit_length  320      /* Length of the cbits table */
   1782 
   1783 /* Offsets of the various tables from the base tables pointer, and
   1784 total length. */
   1785 
   1786 #define lcc_offset      0
   1787 #define fcc_offset    256
   1788 #define cbits_offset  512
   1789 #define ctypes_offset (cbits_offset + cbit_length)
   1790 #define tables_length (ctypes_offset + 256)
   1791 
   1792 /* Layout of the UCP type table that translates property names into types and
   1793 codes. Each entry used to point directly to a name, but to reduce the number of
   1794 relocations in shared libraries, it now has an offset into a single string
   1795 instead. */
   1796 
   1797 typedef struct {
   1798   pcre_uint16 name_offset;
   1799   pcre_uint16 type;
   1800   pcre_uint16 value;
   1801 } ucp_type_table;
   1802 
   1803 
   1804 /* Internal shared data tables. These are tables that are used by more than one
   1805 of the exported public functions. They have to be "external" in the C sense,
   1806 but are not part of the PCRE public API. The data for these tables is in the
   1807 pcre_tables.c module. */
   1808 
   1809 extern const int    _pcre_utf8_table1[];
   1810 extern const int    _pcre_utf8_table2[];
   1811 extern const int    _pcre_utf8_table3[];
   1812 extern const uschar _pcre_utf8_table4[];
   1813 
   1814 extern const int    _pcre_utf8_table1_size;
   1815 
   1816 extern const char   _pcre_utt_names[];
   1817 extern const ucp_type_table _pcre_utt[];
   1818 extern const int _pcre_utt_size;
   1819 
   1820 extern const uschar _pcre_default_tables[];
   1821 
   1822 extern const uschar _pcre_OP_lengths[];
   1823 
   1824 
   1825 /* Internal shared functions. These are functions that are used by more than
   1826 one of the exported public functions. They have to be "external" in the C
   1827 sense, but are not part of the PCRE public API. */
   1828 
   1829 extern const uschar *_pcre_find_bracket(const uschar *, BOOL, int);
   1830 extern BOOL          _pcre_is_newline(USPTR, int, USPTR, int *, BOOL);
   1831 extern int           _pcre_ord2utf8(int, uschar *);
   1832 extern real_pcre    *_pcre_try_flipped(const real_pcre *, real_pcre *,
   1833                        const pcre_study_data *, pcre_study_data *);
   1834 extern int           _pcre_valid_utf8(USPTR, int);
   1835 extern BOOL          _pcre_was_newline(USPTR, int, USPTR, int *, BOOL);
   1836 extern BOOL          _pcre_xclass(int, const uschar *);
   1837 
   1838 
   1839 /* Unicode character database (UCD) */
   1840 
   1841 typedef struct {
   1842   uschar script;
   1843   uschar chartype;
   1844   pcre_int32 other_case;
   1845 } ucd_record;
   1846 
   1847 extern const ucd_record  _pcre_ucd_records[];
   1848 extern const uschar      _pcre_ucd_stage1[];
   1849 extern const pcre_uint16 _pcre_ucd_stage2[];
   1850 extern const int         _pcre_ucp_gentype[];
   1851 
   1852 
   1853 /* UCD access macros */
   1854 
   1855 #define UCD_BLOCK_SIZE 128
   1856 #define GET_UCD(ch) (_pcre_ucd_records + \
   1857         _pcre_ucd_stage2[_pcre_ucd_stage1[(ch) / UCD_BLOCK_SIZE] * \
   1858         UCD_BLOCK_SIZE + ch % UCD_BLOCK_SIZE])
   1859 
   1860 #define UCD_CHARTYPE(ch)  GET_UCD(ch)->chartype
   1861 #define UCD_SCRIPT(ch)    GET_UCD(ch)->script
   1862 #define UCD_CATEGORY(ch)  _pcre_ucp_gentype[UCD_CHARTYPE(ch)]
   1863 #define UCD_OTHERCASE(ch) (ch + GET_UCD(ch)->other_case)
   1864 
   1865 #endif
   1866 
   1867 /* End of pcre_internal.h */
   1868