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Diffstat (limited to 'pcre2-10.21/src/pcre2_match.c')
| -rw-r--r-- | pcre2-10.21/src/pcre2_match.c | 7243 |
1 files changed, 7243 insertions, 0 deletions
diff --git a/pcre2-10.21/src/pcre2_match.c b/pcre2-10.21/src/pcre2_match.c new file mode 100644 index 00000000..f5275c7c --- /dev/null +++ b/pcre2-10.21/src/pcre2_match.c @@ -0,0 +1,7243 @@ +/************************************************* +* Perl-Compatible Regular Expressions * +*************************************************/ + +/* PCRE is a library of functions to support regular expressions whose syntax +and semantics are as close as possible to those of the Perl 5 language. + + Written by Philip Hazel + Original API code Copyright (c) 1997-2012 University of Cambridge + New API code Copyright (c) 2016 University of Cambridge + +----------------------------------------------------------------------------- +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + * Neither the name of the University of Cambridge nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE +LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +POSSIBILITY OF SUCH DAMAGE. +----------------------------------------------------------------------------- +*/ + + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#define NLBLOCK mb /* Block containing newline information */ +#define PSSTART start_subject /* Field containing processed string start */ +#define PSEND end_subject /* Field containing processed string end */ + +#include "pcre2_internal.h" + +/* Masks for identifying the public options that are permitted at match time. +*/ + +#define PUBLIC_MATCH_OPTIONS \ + (PCRE2_ANCHORED|PCRE2_NOTBOL|PCRE2_NOTEOL|PCRE2_NOTEMPTY| \ + PCRE2_NOTEMPTY_ATSTART|PCRE2_NO_UTF_CHECK|PCRE2_PARTIAL_HARD| \ + PCRE2_PARTIAL_SOFT) + +#define PUBLIC_JIT_MATCH_OPTIONS \ + (PCRE2_NO_UTF_CHECK|PCRE2_NOTBOL|PCRE2_NOTEOL|PCRE2_NOTEMPTY|\ + PCRE2_NOTEMPTY_ATSTART|PCRE2_PARTIAL_SOFT|PCRE2_PARTIAL_HARD) + +/* The mb->capture_last field uses the lower 16 bits for the last captured +substring (which can never be greater than 65535) and a bit in the top half +to mean "capture vector overflowed". This odd way of doing things was +implemented when it was realized that preserving and restoring the overflow bit +whenever the last capture number was saved/restored made for a neater +interface, and doing it this way saved on (a) another variable, which would +have increased the stack frame size (a big NO-NO in PCRE) and (b) another +separate set of save/restore instructions. The following defines are used in +implementing this. */ + +#define CAPLMASK 0x0000ffff /* The bits used for last_capture */ +#define OVFLMASK 0xffff0000 /* The bits used for the overflow flag */ +#define OVFLBIT 0x00010000 /* The bit that is set for overflow */ + +/* Bits for setting in mb->match_function_type to indicate two special types +of call to match(). We do it this way to save on using another stack variable, +as stack usage is to be discouraged. */ + +#define MATCH_CONDASSERT 1 /* Called to check a condition assertion */ +#define MATCH_CBEGROUP 2 /* Could-be-empty unlimited repeat group */ + +/* Non-error returns from the match() function. Error returns are externally +defined PCRE2_ERROR_xxx codes, which are all negative. */ + +#define MATCH_MATCH 1 +#define MATCH_NOMATCH 0 + +/* Special internal returns from the match() function. Make them sufficiently +negative to avoid the external error codes. */ + +#define MATCH_ACCEPT (-999) +#define MATCH_KETRPOS (-998) +#define MATCH_ONCE (-997) +/* The next 5 must be kept together and in sequence so that a test that checks +for any one of them can use a range. */ +#define MATCH_COMMIT (-996) +#define MATCH_PRUNE (-995) +#define MATCH_SKIP (-994) +#define MATCH_SKIP_ARG (-993) +#define MATCH_THEN (-992) +#define MATCH_BACKTRACK_MAX MATCH_THEN +#define MATCH_BACKTRACK_MIN MATCH_COMMIT + +/* Min and max values for the common repeats; for the maxima, 0 => infinity */ + +static const char rep_min[] = { 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, }; +static const char rep_max[] = { 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, }; + +/* Maximum number of ovector elements that can be saved on the system stack +when processing OP_RECURSE in non-HEAP_MATCH_RECURSE mode. If the ovector is +bigger, malloc() is used. This value should be a multiple of 3, because the +ovector length is always a multiple of 3. */ + +#define OP_RECURSE_STACK_SAVE_MAX 45 + + + +/************************************************* +* Match a back-reference * +*************************************************/ + +/* This function is called only when it is known that the offset lies within +the offsets that have so far been used in the match. Note that in caseless +UTF-8 mode, the number of subject bytes matched may be different to the number +of reference bytes. (In theory this could also happen in UTF-16 mode, but it +seems unlikely.) + +Arguments: + offset index into the offset vector + offset_top top of the used offset vector + eptr pointer into the subject + mb points to match block + caseless TRUE if caseless + lengthptr pointer for returning the length matched + +Returns: = 0 sucessful match; number of code units matched is set + < 0 no match + > 0 partial match +*/ + +static int +match_ref(PCRE2_SIZE offset, PCRE2_SIZE offset_top, register PCRE2_SPTR eptr, + match_block *mb, BOOL caseless, PCRE2_SIZE *lengthptr) +{ +#if defined SUPPORT_UNICODE +BOOL utf = (mb->poptions & PCRE2_UTF) != 0; +#endif + +register PCRE2_SPTR p; +PCRE2_SIZE length; +PCRE2_SPTR eptr_start = eptr; + +/* Deal with an unset group. The default is no match, but there is an option to +match an empty string. */ + +if (offset >= offset_top || mb->ovector[offset] == PCRE2_UNSET) + { + if ((mb->poptions & PCRE2_MATCH_UNSET_BACKREF) != 0) + { + *lengthptr = 0; + return 0; /* Match */ + } + else return -1; /* No match */ + } + +/* Separate the caseless and UTF cases for speed. */ + +p = mb->start_subject + mb->ovector[offset]; +length = mb->ovector[offset+1] - mb->ovector[offset]; + +if (caseless) + { +#if defined SUPPORT_UNICODE + if (utf) + { + /* Match characters up to the end of the reference. NOTE: the number of + code units matched may differ, because in UTF-8 there are some characters + whose upper and lower case versions code have different numbers of bytes. + For example, U+023A (2 bytes in UTF-8) is the upper case version of U+2C65 + (3 bytes in UTF-8); a sequence of 3 of the former uses 6 bytes, as does a + sequence of two of the latter. It is important, therefore, to check the + length along the reference, not along the subject (earlier code did this + wrong). */ + + PCRE2_SPTR endptr = p + length; + while (p < endptr) + { + uint32_t c, d; + const ucd_record *ur; + if (eptr >= mb->end_subject) return 1; /* Partial match */ + GETCHARINC(c, eptr); + GETCHARINC(d, p); + ur = GET_UCD(d); + if (c != d && c != (uint32_t)((int)d + ur->other_case)) + { + const uint32_t *pp = PRIV(ucd_caseless_sets) + ur->caseset; + for (;;) + { + if (c < *pp) return -1; /* No match */ + if (c == *pp++) break; + } + } + } + } + else +#endif + + /* Not in UTF mode */ + + { + for (; length > 0; length--) + { + uint32_t cc, cp; + if (eptr >= mb->end_subject) return 1; /* Partial match */ + cc = UCHAR21TEST(eptr); + cp = UCHAR21TEST(p); + if (TABLE_GET(cp, mb->lcc, cp) != TABLE_GET(cc, mb->lcc, cc)) + return -1; /* No match */ + p++; + eptr++; + } + } + } + +/* In the caseful case, we can just compare the code units, whether or not we +are in UTF mode. */ + +else + { + for (; length > 0; length--) + { + if (eptr >= mb->end_subject) return 1; /* Partial match */ + if (UCHAR21INCTEST(p) != UCHAR21INCTEST(eptr)) return -1; /*No match */ + } + } + +*lengthptr = eptr - eptr_start; +return 0; /* Match */ +} + + + +/*************************************************************************** +**************************************************************************** + RECURSION IN THE match() FUNCTION + +The match() function is highly recursive, though not every recursive call +increases the recursion depth. Nevertheless, some regular expressions can cause +it to recurse to a great depth. I was writing for Unix, so I just let it call +itself recursively. This uses the stack for saving everything that has to be +saved for a recursive call. On Unix, the stack can be large, and this works +fine. + +It turns out that on some non-Unix-like systems there are problems with +programs that use a lot of stack. (This despite the fact that every last chip +has oodles of memory these days, and techniques for extending the stack have +been known for decades.) So.... + +There is a fudge, triggered by defining HEAP_MATCH_RECURSE, which avoids +recursive calls by keeping local variables that need to be preserved in blocks +of memory on the heap instead instead of on the stack. Macros are used to +achieve this so that the actual code doesn't look very different to what it +always used to. + +The original heap-recursive code used longjmp(). However, it seems that this +can be very slow on some operating systems. Following a suggestion from Stan +Switzer, the use of longjmp() has been abolished, at the cost of having to +provide a unique number for each call to RMATCH. There is no way of generating +a sequence of numbers at compile time in C. I have given them names, to make +them stand out more clearly. + +Crude tests on x86 Linux show a small speedup of around 5-8%. However, on +FreeBSD, avoiding longjmp() more than halves the time taken to run the standard +tests. Furthermore, not using longjmp() means that local dynamic variables +don't have indeterminate values; this has meant that the frame size can be +reduced because the result can be "passed back" by straight setting of the +variable instead of being passed in the frame. +**************************************************************************** +***************************************************************************/ + +/* Numbers for RMATCH calls. When this list is changed, the code at HEAP_RETURN +below must be updated in sync. */ + +enum { RM1=1, RM2, RM3, RM4, RM5, RM6, RM7, RM8, RM9, RM10, + RM11, RM12, RM13, RM14, RM15, RM16, RM17, RM18, RM19, RM20, + RM21, RM22, RM23, RM24, RM25, RM26, RM27, RM28, RM29, RM30, + RM31, RM32, RM33, RM34, RM35, RM36, RM37, RM38, RM39, RM40, + RM41, RM42, RM43, RM44, RM45, RM46, RM47, RM48, RM49, RM50, + RM51, RM52, RM53, RM54, RM55, RM56, RM57, RM58, RM59, RM60, + RM61, RM62, RM63, RM64, RM65, RM66, RM67, RM68 }; + +/* These versions of the macros use the stack, as normal. Note that the "rw" +argument of RMATCH isn't actually used in this definition. */ + +#ifndef HEAP_MATCH_RECURSE +#define REGISTER register +#define RMATCH(ra,rb,rc,rd,re,rw) \ + rrc = match(ra,rb,mstart,rc,rd,re,rdepth+1) +#define RRETURN(ra) return ra +#else + +/* These versions of the macros manage a private stack on the heap. Note that +the "rd" argument of RMATCH isn't actually used in this definition. It's the mb +argument of match(), which never changes. */ + +#define REGISTER + +#define RMATCH(ra,rb,rc,rd,re,rw)\ + {\ + heapframe *newframe = frame->Xnextframe;\ + if (newframe == NULL)\ + {\ + newframe = (heapframe *)(mb->stack_memctl.malloc)\ + (sizeof(heapframe), mb->stack_memctl.memory_data);\ + if (newframe == NULL) RRETURN(PCRE2_ERROR_NOMEMORY);\ + newframe->Xnextframe = NULL;\ + frame->Xnextframe = newframe;\ + }\ + frame->Xwhere = rw;\ + newframe->Xeptr = ra;\ + newframe->Xecode = rb;\ + newframe->Xmstart = mstart;\ + newframe->Xoffset_top = rc;\ + newframe->Xeptrb = re;\ + newframe->Xrdepth = frame->Xrdepth + 1;\ + newframe->Xprevframe = frame;\ + frame = newframe;\ + goto HEAP_RECURSE;\ + L_##rw:;\ + } + +#define RRETURN(ra)\ + {\ + heapframe *oldframe = frame;\ + frame = oldframe->Xprevframe;\ + if (frame != NULL)\ + {\ + rrc = ra;\ + goto HEAP_RETURN;\ + }\ + return ra;\ + } + + +/* Structure for remembering the local variables in a private frame. Arrange it +so as to minimize the number of holes. */ + +typedef struct heapframe { + struct heapframe *Xprevframe; + struct heapframe *Xnextframe; + +#ifdef SUPPORT_UNICODE + PCRE2_SPTR Xcharptr; +#endif + PCRE2_SPTR Xeptr; + PCRE2_SPTR Xecode; + PCRE2_SPTR Xmstart; + PCRE2_SPTR Xcallpat; + PCRE2_SPTR Xdata; + PCRE2_SPTR Xnext_ecode; + PCRE2_SPTR Xpp; + PCRE2_SPTR Xprev; + PCRE2_SPTR Xsaved_eptr; + + eptrblock *Xeptrb; + + PCRE2_SIZE Xlength; + PCRE2_SIZE Xoffset; + PCRE2_SIZE Xoffset_top; + PCRE2_SIZE Xsave_offset1, Xsave_offset2, Xsave_offset3; + + uint32_t Xfc; + uint32_t Xnumber; + uint32_t Xrdepth; + uint32_t Xop; + uint32_t Xsave_capture_last; + +#ifdef SUPPORT_UNICODE + uint32_t Xprop_value; + int Xprop_type; + int Xprop_fail_result; + int Xoclength; +#endif + + int Xcodelink; + int Xctype; + int Xfi; + int Xmax; + int Xmin; + int Xwhere; /* Where to jump back to */ + + BOOL Xcondition; + BOOL Xcur_is_word; + BOOL Xprev_is_word; + + eptrblock Xnewptrb; + recursion_info Xnew_recursive; + +#ifdef SUPPORT_UNICODE + PCRE2_UCHAR Xocchars[6]; +#endif +} heapframe; + +#endif + + +/*************************************************************************** +***************************************************************************/ + + +/* When HEAP_MATCH_RECURSE is not defined, the match() function implements +backtrack points by calling itself recursively in all but one case. The one +special case is when processing OP_RECURSE, which specifies recursion in the +pattern. The entire ovector must be saved and restored while processing +OP_RECURSE. If the ovector is small enough, instead of calling match() +directly, op_recurse_ovecsave() is called. This function uses the system stack +to save the ovector while calling match() to process the pattern recursion. */ + +#ifndef HEAP_MATCH_RECURSE + +/* We need a prototype for match() because it is mutually recursive with +op_recurse_ovecsave(). */ + +static int +match(REGISTER PCRE2_SPTR eptr, REGISTER PCRE2_SPTR ecode, PCRE2_SPTR mstart, + PCRE2_SIZE offset_top, match_block *mb, eptrblock *eptrb, uint32_t rdepth); + + +/************************************************* +* Process OP_RECURSE, stacking ovector * +*************************************************/ + +/* When this function is called, mb->recursive has already been updated to +point to a new recursion data block, and all its fields other than ovec_save +have been set. + +This function exists so that the local vector variable ovecsave is no longer +defined in the match() function, as it was in PCRE1. It is used only when there +is recursion in the pattern, so it wastes a lot of stack to have it defined for +every call of match(). We now use this function as an indirect way of calling +match() only in the case when ovecsave is needed. (David Wheeler used to say +"All problems in computer science can be solved by another level of +indirection.") + +HOWEVER: when this file is compiled by gcc in an optimizing mode, because this +function is called only once, and only from within match(), gcc will "inline" +it - that is, move it inside match() - and this completely negates its reason +for existence. Therefore, we mark it as non-inline when gcc is in use. + +Arguments: + eptr pointer to current character in subject + callpat the recursion point in the pattern + mstart pointer to the current match start position (can be modified + by encountering \K) + offset_top current top pointer (highest ovector offset used + 1) + mb pointer to "static" info block for the match + eptrb pointer to chain of blocks containing eptr at start of + brackets - for testing for empty matches + rdepth the recursion depth + +Returns: a match() return code +*/ + +static int +#ifdef __GNUC__ +__attribute__ ((noinline)) +#endif +op_recurse_ovecsave(REGISTER PCRE2_SPTR eptr, PCRE2_SPTR callpat, + PCRE2_SPTR mstart, PCRE2_SIZE offset_top, match_block *mb, eptrblock *eptrb, + uint32_t rdepth) +{ +register int rrc; +BOOL cbegroup = *callpat >= OP_SBRA; +recursion_info *new_recursive = mb->recursive; +PCRE2_SIZE ovecsave[OP_RECURSE_STACK_SAVE_MAX]; + +/* Save the ovector */ + +new_recursive->ovec_save = ovecsave; +memcpy(ovecsave, mb->ovector, mb->offset_end * sizeof(PCRE2_SIZE)); + +/* Do the recursion. After processing each alternative, restore the ovector +data and the last captured value. */ + +do + { + if (cbegroup) mb->match_function_type |= MATCH_CBEGROUP; + rrc = match(eptr, callpat + PRIV(OP_lengths)[*callpat], mstart, offset_top, + mb, eptrb, rdepth + 1); + memcpy(mb->ovector, new_recursive->ovec_save, + mb->offset_end * sizeof(PCRE2_SIZE)); + mb->capture_last = new_recursive->saved_capture_last; + if (rrc == MATCH_MATCH || rrc == MATCH_ACCEPT) return rrc; + + /* PCRE does not allow THEN, SKIP, PRUNE or COMMIT to escape beyond a + recursion; they cause a NOMATCH for the entire recursion. These codes + are defined in a range that can be tested for. */ + + if (rrc >= MATCH_BACKTRACK_MIN && rrc <= MATCH_BACKTRACK_MAX) + return MATCH_NOMATCH; + + /* Any return code other than NOMATCH is an error. Otherwise, advance to the + next alternative or to the end of the recursing subpattern. If there were + nested recursions, mb->recursive might be changed, so reset it before + looping. */ + + if (rrc != MATCH_NOMATCH) return rrc; + mb->recursive = new_recursive; + callpat += GET(callpat, 1); + } +while (*callpat == OP_ALT); /* Loop for the alternatives */ + +/* None of the alternatives matched. */ + +return MATCH_NOMATCH; +} +#endif /* HEAP_MATCH_RECURSE */ + + + +/************************************************* +* Match from current position * +*************************************************/ + +/* This function is called recursively in many circumstances. Whenever it +returns a negative (error) response, the outer incarnation must also return the +same response. */ + +/* These macros pack up tests that are used for partial matching, and which +appear several times in the code. We set the "hit end" flag if the pointer is +at the end of the subject and also past the earliest inspected character (i.e. +something has been matched, even if not part of the actual matched string). For +hard partial matching, we then return immediately. The second one is used when +we already know we are past the end of the subject. */ + +#define CHECK_PARTIAL()\ + if (mb->partial != 0 && eptr >= mb->end_subject && \ + eptr > mb->start_used_ptr) \ + { \ + mb->hitend = TRUE; \ + if (mb->partial > 1) RRETURN(PCRE2_ERROR_PARTIAL); \ + } + +#define SCHECK_PARTIAL()\ + if (mb->partial != 0 && eptr > mb->start_used_ptr) \ + { \ + mb->hitend = TRUE; \ + if (mb->partial > 1) RRETURN(PCRE2_ERROR_PARTIAL); \ + } + + +/* Performance note: It might be tempting to extract commonly used fields from +the mb structure (e.g. utf, end_subject) into individual variables to improve +performance. Tests using gcc on a SPARC disproved this; in the first case, it +made performance worse. + +Arguments: + eptr pointer to current character in subject + ecode pointer to current position in compiled code + mstart pointer to the current match start position (can be modified + by encountering \K) + offset_top current top pointer (highest ovector offset used + 1) + mb pointer to "static" info block for the match + eptrb pointer to chain of blocks containing eptr at start of + brackets - for testing for empty matches + rdepth the recursion depth + +Returns: MATCH_MATCH if matched ) these values are >= 0 + MATCH_NOMATCH if failed to match ) + a negative MATCH_xxx value for PRUNE, SKIP, etc + a negative PCRE2_ERROR_xxx value if aborted by an error condition + (e.g. stopped by repeated call or recursion limit) +*/ + +static int +match(REGISTER PCRE2_SPTR eptr, REGISTER PCRE2_SPTR ecode, PCRE2_SPTR mstart, + PCRE2_SIZE offset_top, match_block *mb, eptrblock *eptrb, uint32_t rdepth) +{ +/* These variables do not need to be preserved over recursion in this function, +so they can be ordinary variables in all cases. Mark some of them with +"register" because they are used a lot in loops. */ + +register int rrc; /* Returns from recursive calls */ +register int i; /* Used for loops not involving calls to RMATCH() */ +register uint32_t c; /* Character values not kept over RMATCH() calls */ +register BOOL utf; /* Local copy of UTF flag for speed */ + +BOOL minimize, possessive; /* Quantifier options */ +BOOL caseless; +int condcode; + +/* When recursion is not being used, all "local" variables that have to be +preserved over calls to RMATCH() are part of a "frame". We set up the top-level +frame on the stack here; subsequent instantiations are obtained from the heap +whenever RMATCH() does a "recursion". See the macro definitions above. Putting +the top-level on the stack rather than malloc-ing them all gives a performance +boost in many cases where there is not much "recursion". */ + +#ifdef HEAP_MATCH_RECURSE +heapframe *frame = (heapframe *)mb->match_frames_base; + +/* Copy in the original argument variables */ + +frame->Xeptr = eptr; +frame->Xecode = ecode; +frame->Xmstart = mstart; +frame->Xoffset_top = offset_top; +frame->Xeptrb = eptrb; +frame->Xrdepth = rdepth; + +/* This is where control jumps back to to effect "recursion" */ + +HEAP_RECURSE: + +/* Macros make the argument variables come from the current frame */ + +#define eptr frame->Xeptr +#define ecode frame->Xecode +#define mstart frame->Xmstart +#define offset_top frame->Xoffset_top +#define eptrb frame->Xeptrb +#define rdepth frame->Xrdepth + +/* Ditto for the local variables */ + +#ifdef SUPPORT_UNICODE +#define charptr frame->Xcharptr +#define prop_value frame->Xprop_value +#define prop_type frame->Xprop_type +#define prop_fail_result frame->Xprop_fail_result +#define oclength frame->Xoclength +#define occhars frame->Xocchars +#endif + + +#define callpat frame->Xcallpat +#define codelink frame->Xcodelink +#define data frame->Xdata +#define next_ecode frame->Xnext_ecode +#define pp frame->Xpp +#define prev frame->Xprev +#define saved_eptr frame->Xsaved_eptr + +#define new_recursive frame->Xnew_recursive + +#define ctype frame->Xctype +#define fc frame->Xfc +#define fi frame->Xfi +#define length frame->Xlength +#define max frame->Xmax +#define min frame->Xmin +#define number frame->Xnumber +#define offset frame->Xoffset +#define op frame->Xop +#define save_capture_last frame->Xsave_capture_last +#define save_offset1 frame->Xsave_offset1 +#define save_offset2 frame->Xsave_offset2 +#define save_offset3 frame->Xsave_offset3 + +#define condition frame->Xcondition +#define cur_is_word frame->Xcur_is_word +#define prev_is_word frame->Xprev_is_word + +#define newptrb frame->Xnewptrb + +/* When normal stack-based recursion is being used for match(), local variables +are allocated on the stack and get preserved during recursion in the usual way. +In this environment, fi and i, and fc and c, can be the same variables. */ + +#else /* HEAP_MATCH_RECURSE not defined */ +#define fi i +#define fc c + +/* Many of the following variables are used only in small blocks of the code. +My normal style of coding would have declared them within each of those blocks. +However, in order to accommodate the version of this code that uses an external +"stack" implemented on the heap, it is easier to declare them all here, so the +declarations can be cut out in a block. The only declarations within blocks +below are for variables that do not have to be preserved over a recursive call +to RMATCH(). */ + +#ifdef SUPPORT_UNICODE +PCRE2_SPTR charptr; +#endif +PCRE2_SPTR callpat; +PCRE2_SPTR data; +PCRE2_SPTR next_ecode; +PCRE2_SPTR pp; +PCRE2_SPTR prev; +PCRE2_SPTR saved_eptr; + +PCRE2_SIZE length; +PCRE2_SIZE offset; +PCRE2_SIZE save_offset1, save_offset2, save_offset3; + +uint32_t number; +uint32_t op; +uint32_t save_capture_last; + +#ifdef SUPPORT_UNICODE +uint32_t prop_value; +int prop_type; +int prop_fail_result; +int oclength; +PCRE2_UCHAR occhars[6]; +#endif + +int codelink; +int ctype; +int max; +int min; + +BOOL condition; +BOOL cur_is_word; +BOOL prev_is_word; + +eptrblock newptrb; +recursion_info new_recursive; +#endif /* HEAP_MATCH_RECURSE not defined */ + +/* To save space on the stack and in the heap frame, I have doubled up on some +of the local variables that are used only in localised parts of the code, but +still need to be preserved over recursive calls of match(). These macros define +the alternative names that are used. */ + +#define allow_zero cur_is_word +#define cbegroup condition +#define code_offset codelink +#define condassert condition +#define foc number +#define matched_once prev_is_word +#define save_mark data + +/* These statements are here to stop the compiler complaining about unitialized +variables. */ + +#ifdef SUPPORT_UNICODE +prop_value = 0; +prop_fail_result = 0; +#endif + + +/* This label is used for tail recursion, which is used in a few cases even +when HEAP_MATCH_RECURSE is not defined, in order to reduce the amount of stack +that is used. Thanks to Ian Taylor for noticing this possibility and sending +the original patch. */ + +TAIL_RECURSE: + +/* OK, now we can get on with the real code of the function. Recursive calls +are specified by the macro RMATCH and RRETURN is used to return. When +HEAP_MATCH_RECURSE is *not* defined, these just turn into a recursive call to +match() and a "return", respectively. However, RMATCH isn't like a function +call because it's quite a complicated macro. It has to be used in one +particular way. This shouldn't, however, impact performance when true recursion +is being used. */ + +#ifdef SUPPORT_UNICODE +utf = (mb->poptions & PCRE2_UTF) != 0; +#else +utf = FALSE; +#endif + +/* First check that we haven't called match() too many times, or that we +haven't exceeded the recursive call limit. */ + +if (mb->match_call_count++ >= mb->match_limit) RRETURN(PCRE2_ERROR_MATCHLIMIT); +if (rdepth >= mb->match_limit_recursion) RRETURN(PCRE2_ERROR_RECURSIONLIMIT); + +/* At the start of a group with an unlimited repeat that may match an empty +string, the variable mb->match_function_type contains the MATCH_CBEGROUP bit. +It is done this way to save having to use another function argument, which +would take up space on the stack. See also MATCH_CONDASSERT below. + +When MATCH_CBEGROUP is set, add the current subject pointer to the chain of +such remembered pointers, to be checked when we hit the closing ket, in order +to break infinite loops that match no characters. When match() is called in +other circumstances, don't add to the chain. The MATCH_CBEGROUP feature must +NOT be used with tail recursion, because the memory block that is used is on +the stack, so a new one may be required for each match(). */ + +if ((mb->match_function_type & MATCH_CBEGROUP) != 0) + { + newptrb.epb_saved_eptr = eptr; + newptrb.epb_prev = eptrb; + eptrb = &newptrb; + mb->match_function_type &= ~MATCH_CBEGROUP; + } + +/* Now, at last, we can start processing the opcodes. */ + +for (;;) + { + minimize = possessive = FALSE; + op = *ecode; + + switch(op) + { + case OP_MARK: + mb->nomatch_mark = ecode + 2; + mb->mark = NULL; /* In case previously set by assertion */ + RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode] + ecode[1], offset_top, mb, + eptrb, RM55); + if ((rrc == MATCH_MATCH || rrc == MATCH_ACCEPT) && + mb->mark == NULL) mb->mark = ecode + 2; + + /* A return of MATCH_SKIP_ARG means that matching failed at SKIP with an + argument, and we must check whether that argument matches this MARK's + argument. It is passed back in mb->start_match_ptr (an overloading of that + variable). If it does match, we reset that variable to the current subject + position and return MATCH_SKIP. Otherwise, pass back the return code + unaltered. */ + + else if (rrc == MATCH_SKIP_ARG && + PRIV(strcmp)(ecode + 2, mb->start_match_ptr) == 0) + { + mb->start_match_ptr = eptr; + RRETURN(MATCH_SKIP); + } + RRETURN(rrc); + + case OP_FAIL: + RRETURN(MATCH_NOMATCH); + + case OP_COMMIT: + RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, mb, + eptrb, RM52); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + RRETURN(MATCH_COMMIT); + + case OP_PRUNE: + RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, mb, + eptrb, RM51); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + RRETURN(MATCH_PRUNE); + + case OP_PRUNE_ARG: + mb->nomatch_mark = ecode + 2; + mb->mark = NULL; /* In case previously set by assertion */ + RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode] + ecode[1], offset_top, mb, + eptrb, RM56); + if ((rrc == MATCH_MATCH || rrc == MATCH_ACCEPT) && + mb->mark == NULL) mb->mark = ecode + 2; + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + RRETURN(MATCH_PRUNE); + + case OP_SKIP: + RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, mb, + eptrb, RM53); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + mb->start_match_ptr = eptr; /* Pass back current position */ + RRETURN(MATCH_SKIP); + + /* Note that, for Perl compatibility, SKIP with an argument does NOT set + nomatch_mark. When a pattern match ends with a SKIP_ARG for which there was + not a matching mark, we have to re-run the match, ignoring the SKIP_ARG + that failed and any that precede it (either they also failed, or were not + triggered). To do this, we maintain a count of executed SKIP_ARGs. If a + SKIP_ARG gets to top level, the match is re-run with mb->ignore_skip_arg + set to the count of the one that failed. */ + + case OP_SKIP_ARG: + mb->skip_arg_count++; + if (mb->skip_arg_count <= mb->ignore_skip_arg) + { + ecode += PRIV(OP_lengths)[*ecode] + ecode[1]; + break; + } + RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode] + ecode[1], offset_top, mb, + eptrb, RM57); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + + /* Pass back the current skip name by overloading mb->start_match_ptr and + returning the special MATCH_SKIP_ARG return code. This will either be + caught by a matching MARK, or get to the top, where it causes a rematch + with mb->ignore_skip_arg set to the value of mb->skip_arg_count. */ + + mb->start_match_ptr = ecode + 2; + RRETURN(MATCH_SKIP_ARG); + + /* For THEN (and THEN_ARG) we pass back the address of the opcode, so that + the branch in which it occurs can be determined. Overload the start of + match pointer to do this. */ + + case OP_THEN: + RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, mb, + eptrb, RM54); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + mb->start_match_ptr = ecode; + RRETURN(MATCH_THEN); + + case OP_THEN_ARG: + mb->nomatch_mark = ecode + 2; + mb->mark = NULL; /* In case previously set by assertion */ + RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode] + ecode[1], offset_top, + mb, eptrb, RM58); + if ((rrc == MATCH_MATCH || rrc == MATCH_ACCEPT) && + mb->mark == NULL) mb->mark = ecode + 2; + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + mb->start_match_ptr = ecode; + RRETURN(MATCH_THEN); + + /* Handle an atomic group that does not contain any capturing parentheses. + This can be handled like an assertion. Prior to 8.13, all atomic groups + were handled this way. In 8.13, the code was changed as below for ONCE, so + that backups pass through the group and thereby reset captured values. + However, this uses a lot more stack, so in 8.20, atomic groups that do not + contain any captures generate OP_ONCE_NC, which can be handled in the old, + less stack intensive way. + + Check the alternative branches in turn - the matching won't pass the KET + for this kind of subpattern. If any one branch matches, we carry on as at + the end of a normal bracket, leaving the subject pointer, but resetting + the start-of-match value in case it was changed by \K. */ + + case OP_ONCE_NC: + prev = ecode; + saved_eptr = eptr; + save_mark = mb->mark; + do + { + RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, mb, eptrb, RM64); + if (rrc == MATCH_MATCH) /* Note: _not_ MATCH_ACCEPT */ + { + mstart = mb->start_match_ptr; + break; + } + if (rrc == MATCH_THEN) + { + next_ecode = ecode + GET(ecode,1); + if (mb->start_match_ptr < next_ecode && + (*ecode == OP_ALT || *next_ecode == OP_ALT)) + rrc = MATCH_NOMATCH; + } + + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + ecode += GET(ecode,1); + mb->mark = save_mark; + } + while (*ecode == OP_ALT); + + /* If hit the end of the group (which could be repeated), fail */ + + if (*ecode != OP_ONCE_NC && *ecode != OP_ALT) RRETURN(MATCH_NOMATCH); + + /* Continue as from after the group, updating the offsets high water + mark, since extracts may have been taken. */ + + do ecode += GET(ecode, 1); while (*ecode == OP_ALT); + + offset_top = mb->end_offset_top; + eptr = mb->end_match_ptr; + + /* For a non-repeating ket, just continue at this level. This also + happens for a repeating ket if no characters were matched in the group. + This is the forcible breaking of infinite loops as implemented in Perl + 5.005. */ + + if (*ecode == OP_KET || eptr == saved_eptr) + { + ecode += 1+LINK_SIZE; + break; + } + + /* The repeating kets try the rest of the pattern or restart from the + preceding bracket, in the appropriate order. The second "call" of match() + uses tail recursion, to avoid using another stack frame. */ + + if (*ecode == OP_KETRMIN) + { + RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, mb, eptrb, RM65); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + ecode = prev; + goto TAIL_RECURSE; + } + else /* OP_KETRMAX */ + { + RMATCH(eptr, prev, offset_top, mb, eptrb, RM66); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + ecode += 1 + LINK_SIZE; + goto TAIL_RECURSE; + } + /* Control never gets here */ + + /* Handle a capturing bracket, other than those that are possessive with an + unlimited repeat. If there is space in the offset vector, save the current + subject position in the working slot at the top of the vector. We mustn't + change the current values of the data slot, because they may be set from a + previous iteration of this group, and be referred to by a reference inside + the group. A failure to match might occur after the group has succeeded, + if something later on doesn't match. For this reason, we need to restore + the working value and also the values of the final offsets, in case they + were set by a previous iteration of the same bracket. + + If there isn't enough space in the offset vector, treat this as if it were + a non-capturing bracket. Don't worry about setting the flag for the error + case here; that is handled in the code for KET. */ + + case OP_CBRA: + case OP_SCBRA: + number = GET2(ecode, 1+LINK_SIZE); + offset = number << 1; + + if (offset < mb->offset_max) + { + save_offset1 = mb->ovector[offset]; + save_offset2 = mb->ovector[offset+1]; + save_offset3 = mb->ovector[mb->offset_end - number]; + save_capture_last = mb->capture_last; + save_mark = mb->mark; + + mb->ovector[mb->offset_end - number] = eptr - mb->start_subject; + + for (;;) + { + if (op >= OP_SBRA) mb->match_function_type |= MATCH_CBEGROUP; + RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, mb, + eptrb, RM1); + if (rrc == MATCH_ONCE) break; /* Backing up through an atomic group */ + + /* If we backed up to a THEN, check whether it is within the current + branch by comparing the address of the THEN that is passed back with + the end of the branch. If it is within the current branch, and the + branch is one of two or more alternatives (it either starts or ends + with OP_ALT), we have reached the limit of THEN's action, so convert + the return code to NOMATCH, which will cause normal backtracking to + happen from now on. Otherwise, THEN is passed back to an outer + alternative. This implements Perl's treatment of parenthesized groups, + where a group not containing | does not affect the current alternative, + that is, (X) is NOT the same as (X|(*F)). */ + + if (rrc == MATCH_THEN) + { + next_ecode = ecode + GET(ecode,1); + if (mb->start_match_ptr < next_ecode && + (*ecode == OP_ALT || *next_ecode == OP_ALT)) + rrc = MATCH_NOMATCH; + } + + /* Anything other than NOMATCH is passed back. */ + + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + mb->capture_last = save_capture_last; + ecode += GET(ecode, 1); + mb->mark = save_mark; + if (*ecode != OP_ALT) break; + } + + mb->ovector[offset] = save_offset1; + mb->ovector[offset+1] = save_offset2; + mb->ovector[mb->offset_end - number] = save_offset3; + + /* At this point, rrc will be one of MATCH_ONCE or MATCH_NOMATCH. */ + + RRETURN(rrc); + } + + /* FALL THROUGH ... Insufficient room for saving captured contents. Treat + as a non-capturing bracket. */ + + /* VVVVVVVVVVVVVVVVVVVVVVVVV */ + /* VVVVVVVVVVVVVVVVVVVVVVVVV */ + + /* Non-capturing or atomic group, except for possessive with unlimited + repeat and ONCE group with no captures. Loop for all the alternatives. + + When we get to the final alternative within the brackets, we used to return + the result of a recursive call to match() whatever happened so it was + possible to reduce stack usage by turning this into a tail recursion, + except in the case of a possibly empty group. However, now that there is + the possiblity of (*THEN) occurring in the final alternative, this + optimization is no longer always possible. + + We can optimize if we know there are no (*THEN)s in the pattern; at present + this is the best that can be done. + + MATCH_ONCE is returned when the end of an atomic group is successfully + reached, but subsequent matching fails. It passes back up the tree (causing + captured values to be reset) until the original atomic group level is + reached. This is tested by comparing mb->once_target with the start of the + group. At this point, the return is converted into MATCH_NOMATCH so that + previous backup points can be taken. */ + + case OP_ONCE: + case OP_BRA: + case OP_SBRA: + + for (;;) + { + if (op >= OP_SBRA || op == OP_ONCE) + mb->match_function_type |= MATCH_CBEGROUP; + + /* If this is not a possibly empty group, and there are no (*THEN)s in + the pattern, and this is the final alternative, optimize as described + above. */ + + else if (!mb->hasthen && ecode[GET(ecode, 1)] != OP_ALT) + { + ecode += PRIV(OP_lengths)[*ecode]; + goto TAIL_RECURSE; + } + + /* In all other cases, we have to make another call to match(). */ + + save_mark = mb->mark; + save_capture_last = mb->capture_last; + RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, mb, eptrb, + RM2); + + /* See comment in the code for capturing groups above about handling + THEN. */ + + if (rrc == MATCH_THEN) + { + next_ecode = ecode + GET(ecode,1); + if (mb->start_match_ptr < next_ecode && + (*ecode == OP_ALT || *next_ecode == OP_ALT)) + rrc = MATCH_NOMATCH; + } + + if (rrc != MATCH_NOMATCH) + { + if (rrc == MATCH_ONCE) + { + PCRE2_SPTR scode = ecode; + if (*scode != OP_ONCE) /* If not at start, find it */ + { + while (*scode == OP_ALT) scode += GET(scode, 1); + scode -= GET(scode, 1); + } + if (mb->once_target == scode) rrc = MATCH_NOMATCH; + } + RRETURN(rrc); + } + ecode += GET(ecode, 1); + mb->mark = save_mark; + if (*ecode != OP_ALT) break; + mb->capture_last = save_capture_last; + } + + RRETURN(MATCH_NOMATCH); + + /* Handle possessive capturing brackets with an unlimited repeat. We come + here from BRAZERO with allow_zero set TRUE. The ovector values are + handled similarly to the normal case above. However, the matching is + different. The end of these brackets will always be OP_KETRPOS, which + returns MATCH_KETRPOS without going further in the pattern. By this means + we can handle the group by iteration rather than recursion, thereby + reducing the amount of stack needed. If the ovector is too small for + capturing, treat as non-capturing. */ + + case OP_CBRAPOS: + case OP_SCBRAPOS: + allow_zero = FALSE; + + POSSESSIVE_CAPTURE: + number = GET2(ecode, 1+LINK_SIZE); + offset = number << 1; + if (offset >= mb->offset_max) goto POSSESSIVE_NON_CAPTURE; + + matched_once = FALSE; + code_offset = (int)(ecode - mb->start_code); + + save_offset1 = mb->ovector[offset]; + save_offset2 = mb->ovector[offset+1]; + save_offset3 = mb->ovector[mb->offset_end - number]; + save_capture_last = mb->capture_last; + + /* Each time round the loop, save the current subject position for use + when the group matches. For MATCH_MATCH, the group has matched, so we + restart it with a new subject starting position, remembering that we had + at least one match. For MATCH_NOMATCH, carry on with the alternatives, as + usual. If we haven't matched any alternatives in any iteration, check to + see if a previous iteration matched. If so, the group has matched; + continue from afterwards. Otherwise it has failed; restore the previous + capture values before returning NOMATCH. */ + + for (;;) + { + mb->ovector[mb->offset_end - number] = eptr - mb->start_subject; + if (op >= OP_SBRA) mb->match_function_type |= MATCH_CBEGROUP; + RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, mb, + eptrb, RM63); + if (rrc == MATCH_KETRPOS) + { + offset_top = mb->end_offset_top; + ecode = mb->start_code + code_offset; + save_capture_last = mb->capture_last; + matched_once = TRUE; + mstart = mb->start_match_ptr; /* In case \K changed it */ + if (eptr == mb->end_match_ptr) /* Matched an empty string */ + { + do ecode += GET(ecode, 1); while (*ecode == OP_ALT); + break; + } + eptr = mb->end_match_ptr; + continue; + } + + /* See comment in the code for capturing groups above about handling + THEN. */ + + if (rrc == MATCH_THEN) + { + next_ecode = ecode + GET(ecode,1); + if (mb->start_match_ptr < next_ecode && + (*ecode == OP_ALT || *next_ecode == OP_ALT)) + rrc = MATCH_NOMATCH; + } + + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + mb->capture_last = save_capture_last; + ecode += GET(ecode, 1); + if (*ecode != OP_ALT) break; + } + + if (!matched_once) + { + mb->ovector[offset] = save_offset1; + mb->ovector[offset+1] = save_offset2; + mb->ovector[mb->offset_end - number] = save_offset3; + } + + if (allow_zero || matched_once) + { + ecode += 1 + LINK_SIZE; + break; + } + RRETURN(MATCH_NOMATCH); + + /* Non-capturing possessive bracket with unlimited repeat. We come here + from BRAZERO with allow_zero = TRUE. The code is similar to the above, + without the capturing complication. It is written out separately for speed + and cleanliness. */ + + case OP_BRAPOS: + case OP_SBRAPOS: + allow_zero = FALSE; + + POSSESSIVE_NON_CAPTURE: + matched_once = FALSE; + code_offset = (int)(ecode - mb->start_code); + save_capture_last = mb->capture_last; + + for (;;) + { + if (op >= OP_SBRA) mb->match_function_type |= MATCH_CBEGROUP; + RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, mb, + eptrb, RM48); + if (rrc == MATCH_KETRPOS) + { + offset_top = mb->end_offset_top; + ecode = mb->start_code + code_offset; + matched_once = TRUE; + mstart = mb->start_match_ptr; /* In case \K reset it */ + if (eptr == mb->end_match_ptr) /* Matched an empty string */ + { + do ecode += GET(ecode, 1); while (*ecode == OP_ALT); + break; + } + eptr = mb->end_match_ptr; + continue; + } + + /* See comment in the code for capturing groups above about handling + THEN. */ + + if (rrc == MATCH_THEN) + { + next_ecode = ecode + GET(ecode,1); + if (mb->start_match_ptr < next_ecode && + (*ecode == OP_ALT || *next_ecode == OP_ALT)) + rrc = MATCH_NOMATCH; + } + + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + ecode += GET(ecode, 1); + if (*ecode != OP_ALT) break; + mb->capture_last = save_capture_last; + } + + if (matched_once || allow_zero) + { + ecode += 1 + LINK_SIZE; + break; + } + RRETURN(MATCH_NOMATCH); + + /* Control never reaches here. */ + + /* Conditional group: compilation checked that there are no more than two + branches. If the condition is false, skipping the first branch takes us + past the end of the item if there is only one branch, but that's exactly + what we want. */ + + case OP_COND: + case OP_SCOND: + + /* The variable codelink will be added to ecode when the condition is + false, to get to the second branch. Setting it to the offset to the ALT + or KET, then incrementing ecode achieves this effect. We now have ecode + pointing to the condition or callout. */ + + codelink = GET(ecode, 1); /* Offset to the second branch */ + ecode += 1 + LINK_SIZE; /* From this opcode */ + + /* Because of the way auto-callout works during compile, a callout item is + inserted between OP_COND and an assertion condition. */ + + if (*ecode == OP_CALLOUT || *ecode == OP_CALLOUT_STR) + { + unsigned int callout_length = (*ecode == OP_CALLOUT) + ? PRIV(OP_lengths)[OP_CALLOUT] : GET(ecode, 1 + 2*LINK_SIZE); + + if (mb->callout != NULL) + { + pcre2_callout_block cb; + cb.version = 1; + cb.capture_top = offset_top/2; + cb.capture_last = mb->capture_last & CAPLMASK; + cb.offset_vector = mb->ovector; + cb.mark = mb->nomatch_mark; + cb.subject = mb->start_subject; + cb.subject_length = (PCRE2_SIZE)(mb->end_subject - mb->start_subject); + cb.start_match = (PCRE2_SIZE)(mstart - mb->start_subject); + cb.current_position = (PCRE2_SIZE)(eptr - mb->start_subject); + cb.pattern_position = GET(ecode, 1); + cb.next_item_length = GET(ecode, 1 + LINK_SIZE); + + if (*ecode == OP_CALLOUT) + { + cb.callout_number = ecode[1 + 2*LINK_SIZE]; + cb.callout_string_offset = 0; + cb.callout_string = NULL; + cb.callout_string_length = 0; + } + else + { + cb.callout_number = 0; + cb.callout_string_offset = GET(ecode, 1 + 3*LINK_SIZE); + cb.callout_string = ecode + (1 + 4*LINK_SIZE) + 1; + cb.callout_string_length = + callout_length - (1 + 4*LINK_SIZE) - 2; + } + + if ((rrc = mb->callout(&cb, mb->callout_data)) > 0) + RRETURN(MATCH_NOMATCH); + if (rrc < 0) RRETURN(rrc); + } + + /* Advance ecode past the callout, so it now points to the condition. We + must adjust codelink so that the value of ecode+codelink is unchanged. */ + + ecode += callout_length; + codelink -= callout_length; + } + + /* Test the various possible conditions */ + + condition = FALSE; + switch(condcode = *ecode) + { + case OP_RREF: /* Numbered group recursion test */ + if (mb->recursive != NULL) /* Not recursing => FALSE */ + { + uint32_t recno = GET2(ecode, 1); /* Recursion group number*/ + condition = (recno == RREF_ANY || recno == mb->recursive->group_num); + } + break; + + case OP_DNRREF: /* Duplicate named group recursion test */ + if (mb->recursive != NULL) + { + int count = GET2(ecode, 1 + IMM2_SIZE); + PCRE2_SPTR slot = mb->name_table + GET2(ecode, 1) * mb->name_entry_size; + while (count-- > 0) + { + uint32_t recno = GET2(slot, 0); + condition = recno == mb->recursive->group_num; + if (condition) break; + slot += mb->name_entry_size; + } + } + break; + + case OP_CREF: /* Numbered group used test */ + offset = GET2(ecode, 1) << 1; /* Doubled ref number */ + condition = offset < offset_top && + mb->ovector[offset] != PCRE2_UNSET; + break; + + case OP_DNCREF: /* Duplicate named group used test */ + { + int count = GET2(ecode, 1 + IMM2_SIZE); + PCRE2_SPTR slot = mb->name_table + GET2(ecode, 1) * mb->name_entry_size; + while (count-- > 0) + { + offset = GET2(slot, 0) << 1; + condition = offset < offset_top && + mb->ovector[offset] != PCRE2_UNSET; + if (condition) break; + slot += mb->name_entry_size; + } + } + break; + + case OP_FALSE: + case OP_FAIL: /* The assertion (?!) becomes OP_FAIL */ + break; + + case OP_TRUE: + condition = TRUE; + break; + + /* The condition is an assertion. Call match() to evaluate it - setting + the MATCH_CONDASSERT bit in mb->match_function_type causes it to stop at + the end of an assertion. */ + + default: + mb->match_function_type |= MATCH_CONDASSERT; + RMATCH(eptr, ecode, offset_top, mb, NULL, RM3); + if (rrc == MATCH_MATCH) + { + if (mb->end_offset_top > offset_top) + offset_top = mb->end_offset_top; /* Captures may have happened */ + condition = TRUE; + + /* Advance ecode past the assertion to the start of the first branch, + but adjust it so that the general choosing code below works. If the + assertion has a quantifier that allows zero repeats we must skip over + the BRAZERO. This is a lunatic thing to do, but somebody did! */ + + if (*ecode == OP_BRAZERO) ecode++; + ecode += GET(ecode, 1); + while (*ecode == OP_ALT) ecode += GET(ecode, 1); + ecode += 1 + LINK_SIZE - PRIV(OP_lengths)[condcode]; + } + + /* PCRE doesn't allow the effect of (*THEN) to escape beyond an + assertion; it is therefore treated as NOMATCH. Any other return is an + error. */ + + else if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) + { + RRETURN(rrc); /* Need braces because of following else */ + } + break; + } + + /* Choose branch according to the condition */ + + ecode += condition? PRIV(OP_lengths)[condcode] : codelink; + + /* We are now at the branch that is to be obeyed. As there is only one, we + can use tail recursion to avoid using another stack frame, except when + there is unlimited repeat of a possibly empty group. In the latter case, a + recursive call to match() is always required, unless the second alternative + doesn't exist, in which case we can just plough on. Note that, for + compatibility with Perl, the | in a conditional group is NOT treated as + creating two alternatives. If a THEN is encountered in the branch, it + propagates out to the enclosing alternative (unless nested in a deeper set + of alternatives, of course). */ + + if (condition || ecode[-(1+LINK_SIZE)] == OP_ALT) + { + if (op != OP_SCOND) + { + goto TAIL_RECURSE; + } + + mb->match_function_type |= MATCH_CBEGROUP; + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM49); + RRETURN(rrc); + } + + /* Condition false & no alternative; continue after the group. */ + + else + { + } + break; + + + /* Before OP_ACCEPT there may be any number of OP_CLOSE opcodes, + to close any currently open capturing brackets. */ + + case OP_CLOSE: + number = GET2(ecode, 1); /* Must be less than 65536 */ + offset = number << 1; + mb->capture_last = (mb->capture_last & OVFLMASK) | number; + if (offset >= mb->offset_max) mb->capture_last |= OVFLBIT; else + { + mb->ovector[offset] = + mb->ovector[mb->offset_end - number]; + mb->ovector[offset+1] = eptr - mb->start_subject; + + /* If this group is at or above the current highwater mark, ensure that + any groups between the current high water mark and this group are marked + unset and then update the high water mark. */ + + if (offset >= offset_top) + { + register PCRE2_SIZE *iptr = mb->ovector + offset_top; + register PCRE2_SIZE *iend = mb->ovector + offset; + while (iptr < iend) *iptr++ = PCRE2_UNSET; + offset_top = offset + 2; + } + } + ecode += 1 + IMM2_SIZE; + break; + + + /* End of the pattern, either real or forced. In an assertion ACCEPT, + update the last used pointer. */ + + case OP_ASSERT_ACCEPT: + if (eptr > mb->last_used_ptr) mb->last_used_ptr = eptr; + + case OP_ACCEPT: + case OP_END: + + /* If we have matched an empty string, fail if not in an assertion and not + in a recursion if either PCRE2_NOTEMPTY is set, or if PCRE2_NOTEMPTY_ATSTART + is set and we have matched at the start of the subject. In both cases, + backtracking will then try other alternatives, if any. */ + + if (eptr == mstart && op != OP_ASSERT_ACCEPT && + mb->recursive == NULL && + ((mb->moptions & PCRE2_NOTEMPTY) != 0 || + ((mb->moptions & PCRE2_NOTEMPTY_ATSTART) != 0 && + mstart == mb->start_subject + mb->start_offset))) + RRETURN(MATCH_NOMATCH); + + /* Otherwise, we have a match. */ + + mb->end_match_ptr = eptr; /* Record where we ended */ + mb->end_offset_top = offset_top; /* and how many extracts were taken */ + mb->start_match_ptr = mstart; /* and the start (\K can modify) */ + + /* For some reason, the macros don't work properly if an expression is + given as the argument to RRETURN when the heap is in use. */ + + rrc = (op == OP_END)? MATCH_MATCH : MATCH_ACCEPT; + RRETURN(rrc); + + /* Assertion brackets. Check the alternative branches in turn - the + matching won't pass the KET for an assertion. If any one branch matches, + the assertion is true. Lookbehind assertions have an OP_REVERSE item at the + start of each branch to move the current point backwards, so the code at + this level is identical to the lookahead case. When the assertion is part + of a condition, we want to return immediately afterwards. The caller of + this incarnation of the match() function will have set MATCH_CONDASSERT in + mb->match_function type, and one of these opcodes will be the first opcode + that is processed. We use a local variable that is preserved over calls to + match() to remember this case. */ + + case OP_ASSERT: + case OP_ASSERTBACK: + save_mark = mb->mark; + if ((mb->match_function_type & MATCH_CONDASSERT) != 0) + { + condassert = TRUE; + mb->match_function_type &= ~MATCH_CONDASSERT; + } + else condassert = FALSE; + + /* Loop for each branch */ + + do + { + RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, mb, NULL, RM4); + + /* A match means that the assertion is true; break out of the loop + that matches its alternatives. */ + + if (rrc == MATCH_MATCH || rrc == MATCH_ACCEPT) + { + mstart = mb->start_match_ptr; /* In case \K reset it */ + break; + } + + /* If not matched, restore the previous mark setting. */ + + mb->mark = save_mark; + + /* See comment in the code for capturing groups above about handling + THEN. */ + + if (rrc == MATCH_THEN) + { + next_ecode = ecode + GET(ecode,1); + if (mb->start_match_ptr < next_ecode && + (*ecode == OP_ALT || *next_ecode == OP_ALT)) + rrc = MATCH_NOMATCH; + } + + /* Anything other than NOMATCH causes the entire assertion to fail, + passing back the return code. This includes COMMIT, SKIP, PRUNE and an + uncaptured THEN, which means they take their normal effect. This + consistent approach does not always have exactly the same effect as in + Perl. */ + + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + ecode += GET(ecode, 1); + } + while (*ecode == OP_ALT); /* Continue for next alternative */ + + /* If we have tried all the alternative branches, the assertion has + failed. If not, we broke out after a match. */ + + if (*ecode == OP_KET) RRETURN(MATCH_NOMATCH); + + /* If checking an assertion for a condition, return MATCH_MATCH. */ + + if (condassert) RRETURN(MATCH_MATCH); + + /* Continue from after a successful assertion, updating the offsets high + water mark, since extracts may have been taken during the assertion. */ + + do ecode += GET(ecode,1); while (*ecode == OP_ALT); + ecode += 1 + LINK_SIZE; + offset_top = mb->end_offset_top; + continue; + + /* Negative assertion: all branches must fail to match for the assertion to + succeed. */ + + case OP_ASSERT_NOT: + case OP_ASSERTBACK_NOT: + save_mark = mb->mark; + if ((mb->match_function_type & MATCH_CONDASSERT) != 0) + { + condassert = TRUE; + mb->match_function_type &= ~MATCH_CONDASSERT; + } + else condassert = FALSE; + + /* Loop for each alternative branch. */ + + do + { + RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, mb, NULL, RM5); + mb->mark = save_mark; /* Always restore the mark setting */ + + switch(rrc) + { + case MATCH_MATCH: /* A successful match means */ + case MATCH_ACCEPT: /* the assertion has failed. */ + RRETURN(MATCH_NOMATCH); + + case MATCH_NOMATCH: /* Carry on with next branch */ + break; + + /* See comment in the code for capturing groups above about handling + THEN. */ + + case MATCH_THEN: + next_ecode = ecode + GET(ecode,1); + if (mb->start_match_ptr < next_ecode && + (*ecode == OP_ALT || *next_ecode == OP_ALT)) + { + rrc = MATCH_NOMATCH; + break; + } + /* Otherwise fall through. */ + + /* COMMIT, SKIP, PRUNE, and an uncaptured THEN cause the whole + assertion to fail to match, without considering any more alternatives. + Failing to match means the assertion is true. This is a consistent + approach, but does not always have the same effect as in Perl. */ + + case MATCH_COMMIT: + case MATCH_SKIP: + case MATCH_SKIP_ARG: + case MATCH_PRUNE: + do ecode += GET(ecode,1); while (*ecode == OP_ALT); + goto NEG_ASSERT_TRUE; /* Break out of alternation loop */ + + /* Anything else is an error */ + + default: + RRETURN(rrc); + } + + /* Continue with next branch */ + + ecode += GET(ecode,1); + } + while (*ecode == OP_ALT); + + /* All branches in the assertion failed to match. */ + + NEG_ASSERT_TRUE: + if (condassert) RRETURN(MATCH_MATCH); /* Condition assertion */ + ecode += 1 + LINK_SIZE; /* Continue with current branch */ + continue; + + /* Move the subject pointer back. This occurs only at the start of + each branch of a lookbehind assertion. If we are too close to the start to + move back, this match function fails. When working with UTF-8 we move + back a number of characters, not bytes. */ + + case OP_REVERSE: + i = GET(ecode, 1); +#ifdef SUPPORT_UNICODE + if (utf) + { + while (i-- > 0) + { + if (eptr <= mb->start_subject) RRETURN(MATCH_NOMATCH); + eptr--; + BACKCHAR(eptr); + } + } + else +#endif + + /* No UTF-8 support, or not in UTF-8 mode: count is byte count */ + + { + if (i > eptr - mb->start_subject) RRETURN(MATCH_NOMATCH); + eptr -= i; + } + + /* Save the earliest consulted character, then skip to next op code */ + + if (eptr < mb->start_used_ptr) mb->start_used_ptr = eptr; + ecode += 1 + LINK_SIZE; + break; + + /* The callout item calls an external function, if one is provided, passing + details of the match so far. This is mainly for debugging, though the + function is able to force a failure. */ + + case OP_CALLOUT: + case OP_CALLOUT_STR: + { + unsigned int callout_length = (*ecode == OP_CALLOUT) + ? PRIV(OP_lengths)[OP_CALLOUT] : GET(ecode, 1 + 2*LINK_SIZE); + + if (mb->callout != NULL) + { + pcre2_callout_block cb; + cb.version = 1; + cb.callout_number = ecode[LINK_SIZE + 1]; + cb.capture_top = offset_top/2; + cb.capture_last = mb->capture_last & CAPLMASK; + cb.offset_vector = mb->ovector; + cb.mark = mb->nomatch_mark; + cb.subject = mb->start_subject; + cb.subject_length = (PCRE2_SIZE)(mb->end_subject - mb->start_subject); + cb.start_match = (PCRE2_SIZE)(mstart - mb->start_subject); + cb.current_position = (PCRE2_SIZE)(eptr - mb->start_subject); + cb.pattern_position = GET(ecode, 1); + cb.next_item_length = GET(ecode, 1 + LINK_SIZE); + + if (*ecode == OP_CALLOUT) + { + cb.callout_number = ecode[1 + 2*LINK_SIZE]; + cb.callout_string_offset = 0; + cb.callout_string = NULL; + cb.callout_string_length = 0; + } + else + { + cb.callout_number = 0; + cb.callout_string_offset = GET(ecode, 1 + 3*LINK_SIZE); + cb.callout_string = ecode + (1 + 4*LINK_SIZE) + 1; + cb.callout_string_length = + callout_length - (1 + 4*LINK_SIZE) - 2; + } + + if ((rrc = mb->callout(&cb, mb->callout_data)) > 0) + RRETURN(MATCH_NOMATCH); + if (rrc < 0) RRETURN(rrc); + } + ecode += callout_length; + } + break; + + /* Recursion either matches the current regex, or some subexpression. The + offset data is the offset to the starting bracket from the start of the + whole pattern. (This is so that it works from duplicated subpatterns.) + + The state of the capturing groups is preserved over recursion, and + re-instated afterwards. We don't know how many are started and not yet + finished (offset_top records the completed total) so we just have to save + all the potential data. There may be up to 65535 such values, which is too + large to put on the stack, but using malloc for small numbers seems + expensive. As a compromise, the stack is used when there are no more than + OP_RECURSE_STACK_SAVE_MAX values to store; otherwise malloc is used. + + There are also other values that have to be saved. We use a chained + sequence of blocks that actually live on the stack. Thanks to Robin Houston + for the original version of this logic. It has, however, been hacked around + a lot, so he is not to blame for the current way it works. */ + + case OP_RECURSE: + { + ovecsave_frame *fr; + recursion_info *ri; + uint32_t recno; + + callpat = mb->start_code + GET(ecode, 1); + recno = (callpat == mb->start_code)? 0 : GET2(callpat, 1 + LINK_SIZE); + + /* Check for repeating a pattern recursion without advancing the subject + pointer. This should catch convoluted mutual recursions. (Some simple + cases are caught at compile time.) */ + + for (ri = mb->recursive; ri != NULL; ri = ri->prevrec) + if (recno == ri->group_num && eptr == ri->subject_position) + RRETURN(PCRE2_ERROR_RECURSELOOP); + + /* Add to "recursing stack" */ + + new_recursive.group_num = recno; + new_recursive.saved_capture_last = mb->capture_last; + new_recursive.subject_position = eptr; + new_recursive.prevrec = mb->recursive; + mb->recursive = &new_recursive; + + /* Where to continue from afterwards */ + + ecode += 1 + LINK_SIZE; + + /* When we are using the system stack for match() recursion we can call a + function that uses the system stack for preserving the ovector while + processing the pattern recursion, but only if the ovector is small + enough. */ + +#ifndef HEAP_MATCH_RECURSE + if (mb->offset_end <= OP_RECURSE_STACK_SAVE_MAX) + { + rrc = op_recurse_ovecsave(eptr, callpat, mstart, offset_top, mb, + eptrb, rdepth); + mb->recursive = new_recursive.prevrec; + if (rrc != MATCH_MATCH && rrc != MATCH_ACCEPT) RRETURN(rrc); + + /* Set where we got to in the subject, and reset the start, in case + it was changed by \K. This *is* propagated back out of a recursion, + for Perl compatibility. */ + + eptr = mb->end_match_ptr; + mstart = mb->start_match_ptr; + break; /* End of processing OP_RECURSE */ + } +#endif + /* If the ovector is too big, or if we are using the heap for match() + recursion, we have to use the heap for saving the ovector. Used ovecsave + frames are kept on a chain and re-used. This makes a small improvement in + execution time on Linux. */ + + if (mb->ovecsave_chain != NULL) + { + new_recursive.ovec_save = mb->ovecsave_chain->saved_ovec; + mb->ovecsave_chain = mb->ovecsave_chain->next; + } + else + { + fr = (ovecsave_frame *)(mb->memctl.malloc(sizeof(ovecsave_frame *) + + mb->offset_end * sizeof(PCRE2_SIZE), mb->memctl.memory_data)); + if (fr == NULL) RRETURN(PCRE2_ERROR_NOMEMORY); + new_recursive.ovec_save = fr->saved_ovec; + } + + memcpy(new_recursive.ovec_save, mb->ovector, + mb->offset_end * sizeof(PCRE2_SIZE)); + + /* Do the recursion. After processing each alternative, restore the + ovector data and the last captured value. This code has the same overall + logic as the code in the op_recurse_ovecsave() function, but is adapted + to use RMATCH/RRETURN and to release the heap block containing the saved + ovector. */ + + cbegroup = (*callpat >= OP_SBRA); + do + { + if (cbegroup) mb->match_function_type |= MATCH_CBEGROUP; + RMATCH(eptr, callpat + PRIV(OP_lengths)[*callpat], offset_top, + mb, eptrb, RM6); + memcpy(mb->ovector, new_recursive.ovec_save, + mb->offset_end * sizeof(PCRE2_SIZE)); + mb->capture_last = new_recursive.saved_capture_last; + mb->recursive = new_recursive.prevrec; + + if (rrc == MATCH_MATCH || rrc == MATCH_ACCEPT) + { + fr = (ovecsave_frame *) + ((uint8_t *)new_recursive.ovec_save - sizeof(ovecsave_frame *)); + fr->next = mb->ovecsave_chain; + mb->ovecsave_chain = fr; + + /* Set where we got to in the subject, and reset the start, in case + it was changed by \K. This *is* propagated back out of a recursion, + for Perl compatibility. */ + + eptr = mb->end_match_ptr; + mstart = mb->start_match_ptr; + goto RECURSION_MATCHED; /* Exit loop; end processing */ + } + + /* PCRE does not allow THEN, SKIP, PRUNE or COMMIT to escape beyond a + recursion; they cause a NOMATCH for the entire recursion. These codes + are defined in a range that can be tested for. */ + + if (rrc >= MATCH_BACKTRACK_MIN && rrc <= MATCH_BACKTRACK_MAX) + { + rrc = MATCH_NOMATCH; + goto RECURSION_RETURN; + } + + /* Any return code other than NOMATCH is an error. */ + + if (rrc != MATCH_NOMATCH) goto RECURSION_RETURN; + mb->recursive = &new_recursive; + callpat += GET(callpat, 1); + } + while (*callpat == OP_ALT); + + RECURSION_RETURN: + mb->recursive = new_recursive.prevrec; + fr = (ovecsave_frame *) + ((uint8_t *)new_recursive.ovec_save - sizeof(ovecsave_frame *)); + fr->next = mb->ovecsave_chain; + mb->ovecsave_chain = fr; + RRETURN(rrc); + } + + RECURSION_MATCHED: + break; + + /* An alternation is the end of a branch; scan along to find the end of the + bracketed group and go to there. */ + + case OP_ALT: + do ecode += GET(ecode,1); while (*ecode == OP_ALT); + break; + + /* BRAZERO, BRAMINZERO and SKIPZERO occur just before a bracket group, + indicating that it may occur zero times. It may repeat infinitely, or not + at all - i.e. it could be ()* or ()? or even (){0} in the pattern. Brackets + with fixed upper repeat limits are compiled as a number of copies, with the + optional ones preceded by BRAZERO or BRAMINZERO. */ + + case OP_BRAZERO: + next_ecode = ecode + 1; + RMATCH(eptr, next_ecode, offset_top, mb, eptrb, RM10); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + do next_ecode += GET(next_ecode, 1); while (*next_ecode == OP_ALT); + ecode = next_ecode + 1 + LINK_SIZE; + break; + + case OP_BRAMINZERO: + next_ecode = ecode + 1; + do next_ecode += GET(next_ecode, 1); while (*next_ecode == OP_ALT); + RMATCH(eptr, next_ecode + 1+LINK_SIZE, offset_top, mb, eptrb, RM11); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + ecode++; + break; + + case OP_SKIPZERO: + next_ecode = ecode+1; + do next_ecode += GET(next_ecode,1); while (*next_ecode == OP_ALT); + ecode = next_ecode + 1 + LINK_SIZE; + break; + + /* BRAPOSZERO occurs before a possessive bracket group. Don't do anything + here; just jump to the group, with allow_zero set TRUE. */ + + case OP_BRAPOSZERO: + op = *(++ecode); + allow_zero = TRUE; + if (op == OP_CBRAPOS || op == OP_SCBRAPOS) goto POSSESSIVE_CAPTURE; + goto POSSESSIVE_NON_CAPTURE; + + /* End of a group, repeated or non-repeating. */ + + case OP_KET: + case OP_KETRMIN: + case OP_KETRMAX: + case OP_KETRPOS: + prev = ecode - GET(ecode, 1); + + /* If this was a group that remembered the subject start, in order to break + infinite repeats of empty string matches, retrieve the subject start from + the chain. Otherwise, set it NULL. */ + + if (*prev >= OP_SBRA || *prev == OP_ONCE) + { + saved_eptr = eptrb->epb_saved_eptr; /* Value at start of group */ + eptrb = eptrb->epb_prev; /* Backup to previous group */ + } + else saved_eptr = NULL; + + /* If we are at the end of an assertion group or a non-capturing atomic + group, stop matching and return MATCH_MATCH, but record the current high + water mark for use by positive assertions. We also need to record the match + start in case it was changed by \K. */ + + if ((*prev >= OP_ASSERT && *prev <= OP_ASSERTBACK_NOT) || + *prev == OP_ONCE_NC) + { + mb->end_match_ptr = eptr; /* For ONCE_NC */ + mb->end_offset_top = offset_top; + mb->start_match_ptr = mstart; + if (eptr > mb->last_used_ptr) mb->last_used_ptr = eptr; + RRETURN(MATCH_MATCH); /* Sets mb->mark */ + } + + /* For capturing groups we have to check the group number back at the start + and if necessary complete handling an extraction by setting the offsets and + bumping the high water mark. Whole-pattern recursion is coded as a recurse + into group 0, so it won't be picked up here. Instead, we catch it when the + OP_END is reached. Other recursion is handled here. We just have to record + the current subject position and start match pointer and give a MATCH + return. */ + + if (*prev == OP_CBRA || *prev == OP_SCBRA || + *prev == OP_CBRAPOS || *prev == OP_SCBRAPOS) + { + number = GET2(prev, 1+LINK_SIZE); + offset = number << 1; + + /* Handle a recursively called group. */ + + if (mb->recursive != NULL && mb->recursive->group_num == number) + { + mb->end_match_ptr = eptr; + mb->start_match_ptr = mstart; + if (eptr > mb->last_used_ptr) mb->last_used_ptr = eptr; + RRETURN(MATCH_MATCH); + } + + /* Deal with capturing */ + + mb->capture_last = (mb->capture_last & OVFLMASK) | number; + if (offset >= mb->offset_max) mb->capture_last |= OVFLBIT; else + { + /* If offset is greater than offset_top, it means that we are + "skipping" a capturing group, and that group's offsets must be marked + unset. In earlier versions of PCRE, all the offsets were unset at the + start of matching, but this doesn't work because atomic groups and + assertions can cause a value to be set that should later be unset. + Example: matching /(?>(a))b|(a)c/ against "ac". This sets group 1 as + part of the atomic group, but this is not on the final matching path, + so must be unset when 2 is set. (If there is no group 2, there is no + problem, because offset_top will then be 2, indicating no capture.) */ + + if (offset > offset_top) + { + register PCRE2_SIZE *iptr = mb->ovector + offset_top; + register PCRE2_SIZE *iend = mb->ovector + offset; + while (iptr < iend) *iptr++ = PCRE2_UNSET; + } + + /* Now make the extraction */ + + mb->ovector[offset] = mb->ovector[mb->offset_end - number]; + mb->ovector[offset+1] = eptr - mb->start_subject; + if (offset_top <= offset) offset_top = offset + 2; + } + } + + /* OP_KETRPOS is a possessive repeating ket. Remember the current position, + and return the MATCH_KETRPOS. This makes it possible to do the repeats one + at a time from the outer level, thus saving stack. This must precede the + empty string test - in this case that test is done at the outer level. */ + + if (*ecode == OP_KETRPOS) + { + mb->start_match_ptr = mstart; /* In case \K reset it */ + mb->end_match_ptr = eptr; + mb->end_offset_top = offset_top; + if (eptr > mb->last_used_ptr) mb->last_used_ptr = eptr; + RRETURN(MATCH_KETRPOS); + } + + /* For an ordinary non-repeating ket, just continue at this level. This + also happens for a repeating ket if no characters were matched in the + group. This is the forcible breaking of infinite loops as implemented in + Perl 5.005. For a non-repeating atomic group that includes captures, + establish a backup point by processing the rest of the pattern at a lower + level. If this results in a NOMATCH return, pass MATCH_ONCE back to the + original OP_ONCE level, thereby bypassing intermediate backup points, but + resetting any captures that happened along the way. */ + + if (*ecode == OP_KET || eptr == saved_eptr) + { + if (*prev == OP_ONCE) + { + RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, mb, eptrb, RM12); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + mb->once_target = prev; /* Level at which to change to MATCH_NOMATCH */ + RRETURN(MATCH_ONCE); + } + ecode += 1 + LINK_SIZE; /* Carry on at this level */ + break; + } + + /* The normal repeating kets try the rest of the pattern or restart from + the preceding bracket, in the appropriate order. In the second case, we can + use tail recursion to avoid using another stack frame, unless we have an + an atomic group or an unlimited repeat of a group that can match an empty + string. */ + + if (*ecode == OP_KETRMIN) + { + RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, mb, eptrb, RM7); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (*prev == OP_ONCE) + { + RMATCH(eptr, prev, offset_top, mb, eptrb, RM8); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + mb->once_target = prev; /* Level at which to change to MATCH_NOMATCH */ + RRETURN(MATCH_ONCE); + } + if (*prev >= OP_SBRA) /* Could match an empty string */ + { + RMATCH(eptr, prev, offset_top, mb, eptrb, RM50); + RRETURN(rrc); + } + ecode = prev; + goto TAIL_RECURSE; + } + else /* OP_KETRMAX */ + { + RMATCH(eptr, prev, offset_top, mb, eptrb, RM13); + if (rrc == MATCH_ONCE && mb->once_target == prev) rrc = MATCH_NOMATCH; + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (*prev == OP_ONCE) + { + RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, mb, eptrb, RM9); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + mb->once_target = prev; + RRETURN(MATCH_ONCE); + } + ecode += 1 + LINK_SIZE; + goto TAIL_RECURSE; + } + /* Control never gets here */ + + /* Not multiline mode: start of subject assertion, unless notbol. */ + + case OP_CIRC: + if ((mb->moptions & PCRE2_NOTBOL) != 0 && eptr == mb->start_subject) + RRETURN(MATCH_NOMATCH); + + /* Start of subject assertion */ + + case OP_SOD: + if (eptr != mb->start_subject) RRETURN(MATCH_NOMATCH); + ecode++; + break; + + /* Multiline mode: start of subject unless notbol, or after any newline + except for one at the very end, unless PCRE2_ALT_CIRCUMFLEX is set. */ + + case OP_CIRCM: + if ((mb->moptions & PCRE2_NOTBOL) != 0 && eptr == mb->start_subject) + RRETURN(MATCH_NOMATCH); + if (eptr != mb->start_subject && + ((eptr == mb->end_subject && + (mb->poptions & PCRE2_ALT_CIRCUMFLEX) == 0) || + !WAS_NEWLINE(eptr))) + RRETURN(MATCH_NOMATCH); + ecode++; + break; + + /* Start of match assertion */ + + case OP_SOM: + if (eptr != mb->start_subject + mb->start_offset) RRETURN(MATCH_NOMATCH); + ecode++; + break; + + /* Reset the start of match point */ + + case OP_SET_SOM: + mstart = eptr; + ecode++; + break; + + /* Multiline mode: assert before any newline, or before end of subject + unless noteol is set. */ + + case OP_DOLLM: + if (eptr < mb->end_subject) + { + if (!IS_NEWLINE(eptr)) + { + if (mb->partial != 0 && + eptr + 1 >= mb->end_subject && + NLBLOCK->nltype == NLTYPE_FIXED && + NLBLOCK->nllen == 2 && + UCHAR21TEST(eptr) == NLBLOCK->nl[0]) + { + mb->hitend = TRUE; + if (mb->partial > 1) RRETURN(PCRE2_ERROR_PARTIAL); + } + RRETURN(MATCH_NOMATCH); + } + } + else + { + if ((mb->moptions & PCRE2_NOTEOL) != 0) RRETURN(MATCH_NOMATCH); + SCHECK_PARTIAL(); + } + ecode++; + break; + + /* Not multiline mode: assert before a terminating newline or before end of + subject unless noteol is set. */ + + case OP_DOLL: + if ((mb->moptions & PCRE2_NOTEOL) != 0) RRETURN(MATCH_NOMATCH); + if ((mb->poptions & PCRE2_DOLLAR_ENDONLY) == 0) goto ASSERT_NL_OR_EOS; + + /* ... else fall through for endonly */ + + /* End of subject assertion (\z) */ + + case OP_EOD: + if (eptr < mb->end_subject) RRETURN(MATCH_NOMATCH); + SCHECK_PARTIAL(); + ecode++; + break; + + /* End of subject or ending \n assertion (\Z) */ + + case OP_EODN: + ASSERT_NL_OR_EOS: + if (eptr < mb->end_subject && + (!IS_NEWLINE(eptr) || eptr != mb->end_subject - mb->nllen)) + { + if (mb->partial != 0 && + eptr + 1 >= mb->end_subject && + NLBLOCK->nltype == NLTYPE_FIXED && + NLBLOCK->nllen == 2 && + UCHAR21TEST(eptr) == NLBLOCK->nl[0]) + { + mb->hitend = TRUE; + if (mb->partial > 1) RRETURN(PCRE2_ERROR_PARTIAL); + } + RRETURN(MATCH_NOMATCH); + } + + /* Either at end of string or \n before end. */ + + SCHECK_PARTIAL(); + ecode++; + break; + + /* Word boundary assertions */ + + case OP_NOT_WORD_BOUNDARY: + case OP_WORD_BOUNDARY: + { + + /* Find out if the previous and current characters are "word" characters. + It takes a bit more work in UTF-8 mode. Characters > 255 are assumed to + be "non-word" characters. Remember the earliest consulted character for + partial matching. */ + +#ifdef SUPPORT_UNICODE + if (utf) + { + /* Get status of previous character */ + + if (eptr == mb->start_subject) prev_is_word = FALSE; else + { + PCRE2_SPTR lastptr = eptr - 1; + BACKCHAR(lastptr); + if (lastptr < mb->start_used_ptr) mb->start_used_ptr = lastptr; + GETCHAR(c, lastptr); + if ((mb->poptions & PCRE2_UCP) != 0) + { + if (c == '_') prev_is_word = TRUE; else + { + int cat = UCD_CATEGORY(c); + prev_is_word = (cat == ucp_L || cat == ucp_N); + } + } + else + prev_is_word = c < 256 && (mb->ctypes[c] & ctype_word) != 0; + } + + /* Get status of next character */ + + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + cur_is_word = FALSE; + } + else + { + PCRE2_SPTR nextptr = eptr + 1; + FORWARDCHARTEST(nextptr, mb->end_subject); + if (nextptr > mb->last_used_ptr) mb->last_used_ptr = nextptr; + GETCHAR(c, eptr); + if ((mb->poptions & PCRE2_UCP) != 0) + { + if (c == '_') cur_is_word = TRUE; else + { + int cat = UCD_CATEGORY(c); + cur_is_word = (cat == ucp_L || cat == ucp_N); + } + } + else + cur_is_word = c < 256 && (mb->ctypes[c] & ctype_word) != 0; + } + } + else +#endif /* SUPPORT UTF */ + + /* Not in UTF-8 mode, but we may still have PCRE2_UCP set, and for + consistency with the behaviour of \w we do use it in this case. */ + + { + /* Get status of previous character */ + + if (eptr == mb->start_subject) prev_is_word = FALSE; else + { + if (eptr <= mb->start_used_ptr) mb->start_used_ptr = eptr - 1; +#ifdef SUPPORT_UNICODE + if ((mb->poptions & PCRE2_UCP) != 0) + { + c = eptr[-1]; + if (c == '_') prev_is_word = TRUE; else + { + int cat = UCD_CATEGORY(c); + prev_is_word = (cat == ucp_L || cat == ucp_N); + } + } + else +#endif + prev_is_word = MAX_255(eptr[-1]) + && ((mb->ctypes[eptr[-1]] & ctype_word) != 0); + } + + /* Get status of next character */ + + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + cur_is_word = FALSE; + } + else + { + if (eptr >= mb->last_used_ptr) mb->last_used_ptr = eptr + 1; +#ifdef SUPPORT_UNICODE + if ((mb->poptions & PCRE2_UCP) != 0) + { + c = *eptr; + if (c == '_') cur_is_word = TRUE; else + { + int cat = UCD_CATEGORY(c); + cur_is_word = (cat == ucp_L || cat == ucp_N); + } + } + else +#endif + cur_is_word = MAX_255(*eptr) + && ((mb->ctypes[*eptr] & ctype_word) != 0); + } + } + + /* Now see if the situation is what we want */ + + if ((*ecode++ == OP_WORD_BOUNDARY)? + cur_is_word == prev_is_word : cur_is_word != prev_is_word) + RRETURN(MATCH_NOMATCH); + } + break; + + /* Match any single character type except newline; have to take care with + CRLF newlines and partial matching. */ + + case OP_ANY: + if (IS_NEWLINE(eptr)) RRETURN(MATCH_NOMATCH); + if (mb->partial != 0 && + eptr + 1 >= mb->end_subject && + NLBLOCK->nltype == NLTYPE_FIXED && + NLBLOCK->nllen == 2 && + UCHAR21TEST(eptr) == NLBLOCK->nl[0]) + { + mb->hitend = TRUE; + if (mb->partial > 1) RRETURN(PCRE2_ERROR_PARTIAL); + } + + /* Fall through */ + + /* Match any single character whatsoever. */ + + case OP_ALLANY: + if (eptr >= mb->end_subject) /* DO NOT merge the eptr++ here; it must */ + { /* not be updated before SCHECK_PARTIAL. */ + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + eptr++; +#ifdef SUPPORT_UNICODE + if (utf) ACROSSCHAR(eptr < mb->end_subject, *eptr, eptr++); +#endif + ecode++; + break; + + /* Match a single code unit, even in UTF-8 mode. This opcode really does + match any code unit, even newline. (It really should be called ANYCODEUNIT, + of course - the byte name is from pre-16 bit days.) */ + + case OP_ANYBYTE: + if (eptr >= mb->end_subject) /* DO NOT merge the eptr++ here; it must */ + { /* not be updated before SCHECK_PARTIAL. */ + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + eptr++; + ecode++; + break; + + case OP_NOT_DIGIT: + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + if ( +#ifdef SUPPORT_WIDE_CHARS + c < 256 && +#endif + (mb->ctypes[c] & ctype_digit) != 0 + ) + RRETURN(MATCH_NOMATCH); + ecode++; + break; + + case OP_DIGIT: + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + if ( +#ifdef SUPPORT_WIDE_CHARS + c > 255 || +#endif + (mb->ctypes[c] & ctype_digit) == 0 + ) + RRETURN(MATCH_NOMATCH); + ecode++; + break; + + case OP_NOT_WHITESPACE: + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + if ( +#ifdef SUPPORT_WIDE_CHARS + c < 256 && +#endif + (mb->ctypes[c] & ctype_space) != 0 + ) + RRETURN(MATCH_NOMATCH); + ecode++; + break; + + case OP_WHITESPACE: + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + if ( +#ifdef SUPPORT_WIDE_CHARS + c > 255 || +#endif + (mb->ctypes[c] & ctype_space) == 0 + ) + RRETURN(MATCH_NOMATCH); + ecode++; + break; + + case OP_NOT_WORDCHAR: + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + if ( +#ifdef SUPPORT_WIDE_CHARS + c < 256 && +#endif + (mb->ctypes[c] & ctype_word) != 0 + ) + RRETURN(MATCH_NOMATCH); + ecode++; + break; + + case OP_WORDCHAR: + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + if ( +#ifdef SUPPORT_WIDE_CHARS + c > 255 || +#endif + (mb->ctypes[c] & ctype_word) == 0 + ) + RRETURN(MATCH_NOMATCH); + ecode++; + break; + + case OP_ANYNL: + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + switch(c) + { + default: RRETURN(MATCH_NOMATCH); + + case CHAR_CR: + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + } + else if (UCHAR21TEST(eptr) == CHAR_LF) eptr++; + break; + + case CHAR_LF: + break; + + case CHAR_VT: + case CHAR_FF: + case CHAR_NEL: +#ifndef EBCDIC + case 0x2028: + case 0x2029: +#endif /* Not EBCDIC */ + if (mb->bsr_convention == PCRE2_BSR_ANYCRLF) RRETURN(MATCH_NOMATCH); + break; + } + ecode++; + break; + + case OP_NOT_HSPACE: + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + switch(c) + { + HSPACE_CASES: RRETURN(MATCH_NOMATCH); /* Byte and multibyte cases */ + default: break; + } + ecode++; + break; + + case OP_HSPACE: + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + switch(c) + { + HSPACE_CASES: break; /* Byte and multibyte cases */ + default: RRETURN(MATCH_NOMATCH); + } + ecode++; + break; + + case OP_NOT_VSPACE: + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + switch(c) + { + VSPACE_CASES: RRETURN(MATCH_NOMATCH); + default: break; + } + ecode++; + break; + + case OP_VSPACE: + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + switch(c) + { + VSPACE_CASES: break; + default: RRETURN(MATCH_NOMATCH); + } + ecode++; + break; + +#ifdef SUPPORT_UNICODE + /* Check the next character by Unicode property. We will get here only + if the support is in the binary; otherwise a compile-time error occurs. */ + + case OP_PROP: + case OP_NOTPROP: + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + { + const uint32_t *cp; + const ucd_record *prop = GET_UCD(c); + + switch(ecode[1]) + { + case PT_ANY: + if (op == OP_NOTPROP) RRETURN(MATCH_NOMATCH); + break; + + case PT_LAMP: + if ((prop->chartype == ucp_Lu || + prop->chartype == ucp_Ll || + prop->chartype == ucp_Lt) == (op == OP_NOTPROP)) + RRETURN(MATCH_NOMATCH); + break; + + case PT_GC: + if ((ecode[2] != PRIV(ucp_gentype)[prop->chartype]) == (op == OP_PROP)) + RRETURN(MATCH_NOMATCH); + break; + + case PT_PC: + if ((ecode[2] != prop->chartype) == (op == OP_PROP)) + RRETURN(MATCH_NOMATCH); + break; + + case PT_SC: + if ((ecode[2] != prop->script) == (op == OP_PROP)) + RRETURN(MATCH_NOMATCH); + break; + + /* These are specials */ + + case PT_ALNUM: + if ((PRIV(ucp_gentype)[prop->chartype] == ucp_L || + PRIV(ucp_gentype)[prop->chartype] == ucp_N) == (op == OP_NOTPROP)) + RRETURN(MATCH_NOMATCH); + break; + + /* Perl space used to exclude VT, but from Perl 5.18 it is included, + which means that Perl space and POSIX space are now identical. PCRE + was changed at release 8.34. */ + + case PT_SPACE: /* Perl space */ + case PT_PXSPACE: /* POSIX space */ + switch(c) + { + HSPACE_CASES: + VSPACE_CASES: + if (op == OP_NOTPROP) RRETURN(MATCH_NOMATCH); + break; + + default: + if ((PRIV(ucp_gentype)[prop->chartype] == ucp_Z) == + (op == OP_NOTPROP)) RRETURN(MATCH_NOMATCH); + break; + } + break; + + case PT_WORD: + if ((PRIV(ucp_gentype)[prop->chartype] == ucp_L || + PRIV(ucp_gentype)[prop->chartype] == ucp_N || + c == CHAR_UNDERSCORE) == (op == OP_NOTPROP)) + RRETURN(MATCH_NOMATCH); + break; + + case PT_CLIST: + cp = PRIV(ucd_caseless_sets) + ecode[2]; + for (;;) + { + if (c < *cp) + { if (op == OP_PROP) { RRETURN(MATCH_NOMATCH); } else break; } + if (c == *cp++) + { if (op == OP_PROP) break; else { RRETURN(MATCH_NOMATCH); } } + } + break; + + case PT_UCNC: + if ((c == CHAR_DOLLAR_SIGN || c == CHAR_COMMERCIAL_AT || + c == CHAR_GRAVE_ACCENT || (c >= 0xa0 && c <= 0xd7ff) || + c >= 0xe000) == (op == OP_NOTPROP)) + RRETURN(MATCH_NOMATCH); + break; + + /* This should never occur */ + + default: + RRETURN(PCRE2_ERROR_INTERNAL); + } + + ecode += 3; + } + break; + + /* Match an extended Unicode sequence. We will get here only if the support + is in the binary; otherwise a compile-time error occurs. */ + + case OP_EXTUNI: + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + else + { + int lgb, rgb; + GETCHARINCTEST(c, eptr); + lgb = UCD_GRAPHBREAK(c); + while (eptr < mb->end_subject) + { + int len = 1; + if (!utf) c = *eptr; else { GETCHARLEN(c, eptr, len); } + rgb = UCD_GRAPHBREAK(c); + if ((PRIV(ucp_gbtable)[lgb] & (1 << rgb)) == 0) break; + lgb = rgb; + eptr += len; + } + } + CHECK_PARTIAL(); + ecode++; + break; +#endif /* SUPPORT_UNICODE */ + + + /* Match a back reference, possibly repeatedly. Look past the end of the + item to see if there is repeat information following. + + The OP_REF and OP_REFI opcodes are used for a reference to a numbered group + or to a non-duplicated named group. For a duplicated named group, OP_DNREF + and OP_DNREFI are used. In this case we must scan the list of groups to + which the name refers, and use the first one that is set. */ + + case OP_DNREF: + case OP_DNREFI: + caseless = op == OP_DNREFI; + { + int count = GET2(ecode, 1+IMM2_SIZE); + PCRE2_SPTR slot = mb->name_table + GET2(ecode, 1) * mb->name_entry_size; + ecode += 1 + 2*IMM2_SIZE; + + /* Initializing 'offset' avoids a compiler warning in the REF_REPEAT + code. */ + + offset = 0; + while (count-- > 0) + { + offset = GET2(slot, 0) << 1; + if (offset < offset_top && mb->ovector[offset] != PCRE2_UNSET) break; + slot += mb->name_entry_size; + } + } + goto REF_REPEAT; + + case OP_REF: + case OP_REFI: + caseless = op == OP_REFI; + offset = GET2(ecode, 1) << 1; /* Doubled ref number */ + ecode += 1 + IMM2_SIZE; + + /* Set up for repetition, or handle the non-repeated case */ + + REF_REPEAT: + switch (*ecode) + { + case OP_CRSTAR: + case OP_CRMINSTAR: + case OP_CRPLUS: + case OP_CRMINPLUS: + case OP_CRQUERY: + case OP_CRMINQUERY: + c = *ecode++ - OP_CRSTAR; + minimize = (c & 1) != 0; + min = rep_min[c]; /* Pick up values from tables; */ + max = rep_max[c]; /* zero for max => infinity */ + if (max == 0) max = INT_MAX; + break; + + case OP_CRRANGE: + case OP_CRMINRANGE: + minimize = (*ecode == OP_CRMINRANGE); + min = GET2(ecode, 1); + max = GET2(ecode, 1 + IMM2_SIZE); + if (max == 0) max = INT_MAX; + ecode += 1 + 2 * IMM2_SIZE; + break; + + default: /* No repeat follows */ + { + int rc = match_ref(offset, offset_top, eptr, mb, caseless, &length); + if (rc != 0) + { + if (rc > 0) eptr = mb->end_subject; /* Partial match */ + CHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + } + eptr += length; + continue; /* With the main loop */ + } + + /* Handle repeated back references. If a set group has length zero, just + continue with the main loop, because it matches however many times. For an + unset reference, if the minimum is zero, we can also just continue. We an + also continue if PCRE2_MATCH_UNSET_BACKREF is set, because this makes unset + group be have as a zero-length group. For any other unset cases, carrying + on will result in NOMATCH. */ + + if (offset < offset_top && mb->ovector[offset] != PCRE2_UNSET) + { + if (mb->ovector[offset] == mb->ovector[offset + 1]) continue; + } + else /* Group is not set */ + { + if (min == 0 || (mb->poptions & PCRE2_MATCH_UNSET_BACKREF) != 0) + continue; + } + + /* First, ensure the minimum number of matches are present. We get back + the length of the reference string explicitly rather than passing the + address of eptr, so that eptr can be a register variable. */ + + for (i = 1; i <= min; i++) + { + PCRE2_SIZE slength; + int rc = match_ref(offset, offset_top, eptr, mb, caseless, &slength); + if (rc != 0) + { + if (rc > 0) eptr = mb->end_subject; /* Partial match */ + CHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + eptr += slength; + } + + /* If min = max, continue at the same level without recursion. + They are not both allowed to be zero. */ + + if (min == max) continue; + + /* If minimizing, keep trying and advancing the pointer */ + + if (minimize) + { + for (fi = min;; fi++) + { + int rc; + PCRE2_SIZE slength; + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM14); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + rc = match_ref(offset, offset_top, eptr, mb, caseless, &slength); + if (rc != 0) + { + if (rc > 0) eptr = mb->end_subject; /* Partial match */ + CHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + eptr += slength; + } + /* Control never gets here */ + } + + /* If maximizing, find the longest string and work backwards, as long as + the matched lengths for each iteration are the same. */ + + else + { + BOOL samelengths = TRUE; + pp = eptr; + length = mb->ovector[offset+1] - mb->ovector[offset]; + + for (i = min; i < max; i++) + { + PCRE2_SIZE slength; + int rc = match_ref(offset, offset_top, eptr, mb, caseless, &slength); + + if (rc != 0) + { + /* Can't use CHECK_PARTIAL because we don't want to update eptr in + the soft partial matching case. */ + + if (rc > 0 && mb->partial != 0 && + mb->end_subject > mb->start_used_ptr) + { + mb->hitend = TRUE; + if (mb->partial > 1) RRETURN(PCRE2_ERROR_PARTIAL); + } + break; + } + + if (slength != length) samelengths = FALSE; + eptr += slength; + } + + /* If the length matched for each repetition is the same as the length of + the captured group, we can easily work backwards. This is the normal + case. However, in caseless UTF-8 mode there are pairs of case-equivalent + characters whose lengths (in terms of code units) differ. However, this + is very rare, so we handle it by re-matching fewer and fewer times. */ + + if (samelengths) + { + while (eptr >= pp) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM15); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + eptr -= length; + } + } + + /* The rare case of non-matching lengths. Re-scan the repetition for each + iteration. We know that match_ref() will succeed every time. */ + + else + { + max = i; + for (;;) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM68); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (eptr == pp) break; /* Failed after minimal repetition */ + eptr = pp; + max--; + for (i = min; i < max; i++) + { + PCRE2_SIZE slength; + (void)match_ref(offset, offset_top, eptr, mb, caseless, &slength); + eptr += slength; + } + } + } + + RRETURN(MATCH_NOMATCH); + } + /* Control never gets here */ + + /* Match a bit-mapped character class, possibly repeatedly. This op code is + used when all the characters in the class have values in the range 0-255, + and either the matching is caseful, or the characters are in the range + 0-127 when UTF-8 processing is enabled. The only difference between + OP_CLASS and OP_NCLASS occurs when a data character outside the range is + encountered. + + First, look past the end of the item to see if there is repeat information + following. Then obey similar code to character type repeats - written out + again for speed. */ + + case OP_NCLASS: + case OP_CLASS: + { + /* The data variable is saved across frames, so the byte map needs to + be stored there. */ +#define BYTE_MAP ((uint8_t *)data) + data = ecode + 1; /* Save for matching */ + ecode += 1 + (32 / sizeof(PCRE2_UCHAR)); /* Advance past the item */ + + switch (*ecode) + { + case OP_CRSTAR: + case OP_CRMINSTAR: + case OP_CRPLUS: + case OP_CRMINPLUS: + case OP_CRQUERY: + case OP_CRMINQUERY: + case OP_CRPOSSTAR: + case OP_CRPOSPLUS: + case OP_CRPOSQUERY: + c = *ecode++ - OP_CRSTAR; + if (c < OP_CRPOSSTAR - OP_CRSTAR) minimize = (c & 1) != 0; + else possessive = TRUE; + min = rep_min[c]; /* Pick up values from tables; */ + max = rep_max[c]; /* zero for max => infinity */ + if (max == 0) max = INT_MAX; + break; + + case OP_CRRANGE: + case OP_CRMINRANGE: + case OP_CRPOSRANGE: + minimize = (*ecode == OP_CRMINRANGE); + possessive = (*ecode == OP_CRPOSRANGE); + min = GET2(ecode, 1); + max = GET2(ecode, 1 + IMM2_SIZE); + if (max == 0) max = INT_MAX; + ecode += 1 + 2 * IMM2_SIZE; + break; + + default: /* No repeat follows */ + min = max = 1; + break; + } + + /* First, ensure the minimum number of matches are present. */ + +#ifdef SUPPORT_UNICODE + if (utf) + { + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINC(c, eptr); + if (c > 255) + { + if (op == OP_CLASS) RRETURN(MATCH_NOMATCH); + } + else + if ((BYTE_MAP[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH); + } + } + else +#endif + /* Not UTF mode */ + { + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + c = *eptr++; +#if PCRE2_CODE_UNIT_WIDTH != 8 + if (c > 255) + { + if (op == OP_CLASS) RRETURN(MATCH_NOMATCH); + } + else +#endif + if ((BYTE_MAP[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH); + } + } + + /* If max == min we can continue with the main loop without the + need to recurse. */ + + if (min == max) continue; + + /* If minimizing, keep testing the rest of the expression and advancing + the pointer while it matches the class. */ + + if (minimize) + { +#ifdef SUPPORT_UNICODE + if (utf) + { + for (fi = min;; fi++) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM16); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINC(c, eptr); + if (c > 255) + { + if (op == OP_CLASS) RRETURN(MATCH_NOMATCH); + } + else + if ((BYTE_MAP[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH); + } + } + else +#endif + /* Not UTF mode */ + { + for (fi = min;; fi++) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM17); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + c = *eptr++; +#if PCRE2_CODE_UNIT_WIDTH != 8 + if (c > 255) + { + if (op == OP_CLASS) RRETURN(MATCH_NOMATCH); + } + else +#endif + if ((BYTE_MAP[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH); + } + } + /* Control never gets here */ + } + + /* If maximizing, find the longest possible run, then work backwards. */ + + else + { + pp = eptr; + +#ifdef SUPPORT_UNICODE + if (utf) + { + for (i = min; i < max; i++) + { + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLEN(c, eptr, len); + if (c > 255) + { + if (op == OP_CLASS) break; + } + else + if ((BYTE_MAP[c/8] & (1 << (c&7))) == 0) break; + eptr += len; + } + + if (possessive) continue; /* No backtracking */ + + for (;;) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM18); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (eptr-- == pp) break; /* Stop if tried at original pos */ + BACKCHAR(eptr); + } + } + else +#endif + /* Not UTF mode */ + { + for (i = min; i < max; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + c = *eptr; +#if PCRE2_CODE_UNIT_WIDTH != 8 + if (c > 255) + { + if (op == OP_CLASS) break; + } + else +#endif + if ((BYTE_MAP[c/8] & (1 << (c&7))) == 0) break; + eptr++; + } + + if (possessive) continue; /* No backtracking */ + + while (eptr >= pp) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM19); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + eptr--; + } + } + + RRETURN(MATCH_NOMATCH); + } +#undef BYTE_MAP + } + /* Control never gets here */ + + + /* Match an extended character class. In the 8-bit library, this opcode is + encountered only when UTF-8 mode mode is supported. In the 16-bit and + 32-bit libraries, codepoints greater than 255 may be encountered even when + UTF is not supported. */ + +#ifdef SUPPORT_WIDE_CHARS + case OP_XCLASS: + { + data = ecode + 1 + LINK_SIZE; /* Save for matching */ + ecode += GET(ecode, 1); /* Advance past the item */ + + switch (*ecode) + { + case OP_CRSTAR: + case OP_CRMINSTAR: + case OP_CRPLUS: + case OP_CRMINPLUS: + case OP_CRQUERY: + case OP_CRMINQUERY: + case OP_CRPOSSTAR: + case OP_CRPOSPLUS: + case OP_CRPOSQUERY: + c = *ecode++ - OP_CRSTAR; + if (c < OP_CRPOSSTAR - OP_CRSTAR) minimize = (c & 1) != 0; + else possessive = TRUE; + min = rep_min[c]; /* Pick up values from tables; */ + max = rep_max[c]; /* zero for max => infinity */ + if (max == 0) max = INT_MAX; + break; + + case OP_CRRANGE: + case OP_CRMINRANGE: + case OP_CRPOSRANGE: + minimize = (*ecode == OP_CRMINRANGE); + possessive = (*ecode == OP_CRPOSRANGE); + min = GET2(ecode, 1); + max = GET2(ecode, 1 + IMM2_SIZE); + if (max == 0) max = INT_MAX; + ecode += 1 + 2 * IMM2_SIZE; + break; + + default: /* No repeat follows */ + min = max = 1; + break; + } + + /* First, ensure the minimum number of matches are present. */ + + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + if (!PRIV(xclass)(c, data, utf)) RRETURN(MATCH_NOMATCH); + } + + /* If max == min we can continue with the main loop without the + need to recurse. */ + + if (min == max) continue; + + /* If minimizing, keep testing the rest of the expression and advancing + the pointer while it matches the class. */ + + if (minimize) + { + for (fi = min;; fi++) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM20); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + if (!PRIV(xclass)(c, data, utf)) RRETURN(MATCH_NOMATCH); + } + /* Control never gets here */ + } + + /* If maximizing, find the longest possible run, then work backwards. */ + + else + { + pp = eptr; + for (i = min; i < max; i++) + { + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } +#ifdef SUPPORT_UNICODE + GETCHARLENTEST(c, eptr, len); +#else + c = *eptr; +#endif + if (!PRIV(xclass)(c, data, utf)) break; + eptr += len; + } + + if (possessive) continue; /* No backtracking */ + + for(;;) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM21); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (eptr-- == pp) break; /* Stop if tried at original pos */ +#ifdef SUPPORT_UNICODE + if (utf) BACKCHAR(eptr); +#endif + } + RRETURN(MATCH_NOMATCH); + } + + /* Control never gets here */ + } +#endif /* End of XCLASS */ + + /* Match a single character, casefully */ + + case OP_CHAR: +#ifdef SUPPORT_UNICODE + if (utf) + { + length = 1; + ecode++; + GETCHARLEN(fc, ecode, length); + if (length > (PCRE2_SIZE)(mb->end_subject - eptr)) + { + CHECK_PARTIAL(); /* Not SCHECK_PARTIAL() */ + RRETURN(MATCH_NOMATCH); + } + for (; length > 0; length--) + { + if (*ecode++ != UCHAR21INC(eptr)) RRETURN(MATCH_NOMATCH); + } + } + else +#endif + /* Not UTF mode */ + { + if (mb->end_subject - eptr < 1) + { + SCHECK_PARTIAL(); /* This one can use SCHECK_PARTIAL() */ + RRETURN(MATCH_NOMATCH); + } + if (ecode[1] != *eptr++) RRETURN(MATCH_NOMATCH); + ecode += 2; + } + break; + + /* Match a single character, caselessly. If we are at the end of the + subject, give up immediately. */ + + case OP_CHARI: + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + +#ifdef SUPPORT_UNICODE + if (utf) + { + length = 1; + ecode++; + GETCHARLEN(fc, ecode, length); + + /* If the pattern character's value is < 128, we have only one byte, and + we know that its other case must also be one byte long, so we can use the + fast lookup table. We know that there is at least one byte left in the + subject. */ + + if (fc < 128) + { + uint32_t cc = UCHAR21(eptr); + if (mb->lcc[fc] != TABLE_GET(cc, mb->lcc, cc)) RRETURN(MATCH_NOMATCH); + ecode++; + eptr++; + } + + /* Otherwise we must pick up the subject character. Note that we cannot + use the value of "length" to check for sufficient bytes left, because the + other case of the character may have more or fewer bytes. */ + + else + { + uint32_t dc; + GETCHARINC(dc, eptr); + ecode += length; + + /* If we have Unicode property support, we can use it to test the other + case of the character, if there is one. */ + + if (fc != dc) + { +#ifdef SUPPORT_UNICODE + if (dc != UCD_OTHERCASE(fc)) +#endif + RRETURN(MATCH_NOMATCH); + } + } + } + else +#endif /* SUPPORT_UNICODE */ + + /* Not UTF mode */ + { + if (TABLE_GET(ecode[1], mb->lcc, ecode[1]) + != TABLE_GET(*eptr, mb->lcc, *eptr)) RRETURN(MATCH_NOMATCH); + eptr++; + ecode += 2; + } + break; + + /* Match a single character repeatedly. */ + + case OP_EXACT: + case OP_EXACTI: + min = max = GET2(ecode, 1); + ecode += 1 + IMM2_SIZE; + goto REPEATCHAR; + + case OP_POSUPTO: + case OP_POSUPTOI: + possessive = TRUE; + /* Fall through */ + + case OP_UPTO: + case OP_UPTOI: + case OP_MINUPTO: + case OP_MINUPTOI: + min = 0; + max = GET2(ecode, 1); + minimize = *ecode == OP_MINUPTO || *ecode == OP_MINUPTOI; + ecode += 1 + IMM2_SIZE; + goto REPEATCHAR; + + case OP_POSSTAR: + case OP_POSSTARI: + possessive = TRUE; + min = 0; + max = INT_MAX; + ecode++; + goto REPEATCHAR; + + case OP_POSPLUS: + case OP_POSPLUSI: + possessive = TRUE; + min = 1; + max = INT_MAX; + ecode++; + goto REPEATCHAR; + + case OP_POSQUERY: + case OP_POSQUERYI: + possessive = TRUE; + min = 0; + max = 1; + ecode++; + goto REPEATCHAR; + + case OP_STAR: + case OP_STARI: + case OP_MINSTAR: + case OP_MINSTARI: + case OP_PLUS: + case OP_PLUSI: + case OP_MINPLUS: + case OP_MINPLUSI: + case OP_QUERY: + case OP_QUERYI: + case OP_MINQUERY: + case OP_MINQUERYI: + c = *ecode++ - ((op < OP_STARI)? OP_STAR : OP_STARI); + minimize = (c & 1) != 0; + min = rep_min[c]; /* Pick up values from tables; */ + max = rep_max[c]; /* zero for max => infinity */ + if (max == 0) max = INT_MAX; + + /* Common code for all repeated single-character matches. We first check + for the minimum number of characters. If the minimum equals the maximum, we + are done. Otherwise, if minimizing, check the rest of the pattern for a + match; if there isn't one, advance up to the maximum, one character at a + time. + + If maximizing, advance up to the maximum number of matching characters, + until eptr is past the end of the maximum run. If possessive, we are + then done (no backing up). Otherwise, match at this position; anything + other than no match is immediately returned. For nomatch, back up one + character, unless we are matching \R and the last thing matched was + \r\n, in which case, back up two bytes. When we reach the first optional + character position, we can save stack by doing a tail recurse. + + The various UTF/non-UTF and caseful/caseless cases are handled separately, + for speed. */ + + REPEATCHAR: +#ifdef SUPPORT_UNICODE + if (utf) + { + length = 1; + charptr = ecode; + GETCHARLEN(fc, ecode, length); + ecode += length; + + /* Handle multibyte character matching specially here. There is + support for caseless matching if UCP support is present. */ + + if (length > 1) + { + uint32_t othercase; + if (op >= OP_STARI && /* Caseless */ + (othercase = UCD_OTHERCASE(fc)) != fc) + oclength = PRIV(ord2utf)(othercase, occhars); + else oclength = 0; + + for (i = 1; i <= min; i++) + { + if (eptr <= mb->end_subject - length && + memcmp(eptr, charptr, CU2BYTES(length)) == 0) eptr += length; + else if (oclength > 0 && + eptr <= mb->end_subject - oclength && + memcmp(eptr, occhars, CU2BYTES(oclength)) == 0) eptr += oclength; + else + { + CHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + } + + if (min == max) continue; + + if (minimize) + { + for (fi = min;; fi++) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM22); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr <= mb->end_subject - length && + memcmp(eptr, charptr, CU2BYTES(length)) == 0) eptr += length; + else if (oclength > 0 && + eptr <= mb->end_subject - oclength && + memcmp(eptr, occhars, CU2BYTES(oclength)) == 0) eptr += oclength; + else + { + CHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + } + /* Control never gets here */ + } + + else /* Maximize */ + { + pp = eptr; + for (i = min; i < max; i++) + { + if (eptr <= mb->end_subject - length && + memcmp(eptr, charptr, CU2BYTES(length)) == 0) eptr += length; + else if (oclength > 0 && + eptr <= mb->end_subject - oclength && + memcmp(eptr, occhars, CU2BYTES(oclength)) == 0) eptr += oclength; + else + { + CHECK_PARTIAL(); + break; + } + } + + if (possessive) continue; /* No backtracking */ + + /* After \C in UTF mode, pp might be in the middle of a Unicode + character. Use <= pp to ensure backtracking doesn't go too far. */ + + for(;;) + { + if (eptr <= pp) goto TAIL_RECURSE; + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM23); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + eptr--; + BACKCHAR(eptr); + } + } + /* Control never gets here */ + } + + /* If the length of a UTF-8 character is 1, we fall through here, and + obey the code as for non-UTF-8 characters below, though in this case the + value of fc will always be < 128. */ + } + else +#endif /* SUPPORT_UNICODE */ + + /* When not in UTF-8 mode, load a single-byte character. */ + fc = *ecode++; + + /* The value of fc at this point is always one character, though we may + or may not be in UTF mode. The code is duplicated for the caseless and + caseful cases, for speed, since matching characters is likely to be quite + common. First, ensure the minimum number of matches are present. If min = + max, continue at the same level without recursing. Otherwise, if + minimizing, keep trying the rest of the expression and advancing one + matching character if failing, up to the maximum. Alternatively, if + maximizing, find the maximum number of characters and work backwards. */ + + if (op >= OP_STARI) /* Caseless */ + { +#if PCRE2_CODE_UNIT_WIDTH == 8 + /* fc must be < 128 if UTF is enabled. */ + foc = mb->fcc[fc]; +#else +#ifdef SUPPORT_UNICODE + if (utf && fc > 127) + foc = UCD_OTHERCASE(fc); + else +#endif /* SUPPORT_UNICODE */ + foc = TABLE_GET(fc, mb->fcc, fc); +#endif /* PCRE2_CODE_UNIT_WIDTH == 8 */ + + for (i = 1; i <= min; i++) + { + uint32_t cc; /* Faster than PCRE2_UCHAR */ + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + cc = UCHAR21TEST(eptr); + if (fc != cc && foc != cc) RRETURN(MATCH_NOMATCH); + eptr++; + } + if (min == max) continue; + if (minimize) + { + for (fi = min;; fi++) + { + uint32_t cc; /* Faster than PCRE2_UCHAR */ + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM24); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + cc = UCHAR21TEST(eptr); + if (fc != cc && foc != cc) RRETURN(MATCH_NOMATCH); + eptr++; + } + /* Control never gets here */ + } + else /* Maximize */ + { + pp = eptr; + for (i = min; i < max; i++) + { + uint32_t cc; /* Faster than PCRE2_UCHAR */ + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + cc = UCHAR21TEST(eptr); + if (fc != cc && foc != cc) break; + eptr++; + } + if (possessive) continue; /* No backtracking */ + for (;;) + { + if (eptr == pp) goto TAIL_RECURSE; + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM25); + eptr--; + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + } + /* Control never gets here */ + } + } + + /* Caseful comparisons (includes all multi-byte characters) */ + + else + { + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + if (fc != UCHAR21INCTEST(eptr)) RRETURN(MATCH_NOMATCH); + } + + if (min == max) continue; + + if (minimize) + { + for (fi = min;; fi++) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM26); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + if (fc != UCHAR21INCTEST(eptr)) RRETURN(MATCH_NOMATCH); + } + /* Control never gets here */ + } + else /* Maximize */ + { + pp = eptr; + for (i = min; i < max; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + if (fc != UCHAR21TEST(eptr)) break; + eptr++; + } + if (possessive) continue; /* No backtracking */ + for (;;) + { + if (eptr == pp) goto TAIL_RECURSE; + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM27); + eptr--; + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + } + /* Control never gets here */ + } + } + /* Control never gets here */ + + /* Match a negated single one-byte character. The character we are + checking can be multibyte. */ + + case OP_NOT: + case OP_NOTI: + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } +#ifdef SUPPORT_UNICODE + if (utf) + { + register uint32_t ch, och; + + ecode++; + GETCHARINC(ch, ecode); + GETCHARINC(c, eptr); + + if (op == OP_NOT) + { + if (ch == c) RRETURN(MATCH_NOMATCH); + } + else + { + if (ch > 127) + och = UCD_OTHERCASE(ch); + else + och = TABLE_GET(ch, mb->fcc, ch); + if (ch == c || och == c) RRETURN(MATCH_NOMATCH); + } + } + else +#endif /* SUPPORT_UNICODE */ + { + register uint32_t ch = ecode[1]; + c = *eptr++; + if (ch == c || (op == OP_NOTI && TABLE_GET(ch, mb->fcc, ch) == c)) + RRETURN(MATCH_NOMATCH); + ecode += 2; + } + break; + + /* Match a negated single one-byte character repeatedly. This is almost a + repeat of the code for a repeated single character, but I haven't found a + nice way of commoning these up that doesn't require a test of the + positive/negative option for each character match. Maybe that wouldn't add + very much to the time taken, but character matching *is* what this is all + about... */ + + case OP_NOTEXACT: + case OP_NOTEXACTI: + min = max = GET2(ecode, 1); + ecode += 1 + IMM2_SIZE; + goto REPEATNOTCHAR; + + case OP_NOTUPTO: + case OP_NOTUPTOI: + case OP_NOTMINUPTO: + case OP_NOTMINUPTOI: + min = 0; + max = GET2(ecode, 1); + minimize = *ecode == OP_NOTMINUPTO || *ecode == OP_NOTMINUPTOI; + ecode += 1 + IMM2_SIZE; + goto REPEATNOTCHAR; + + case OP_NOTPOSSTAR: + case OP_NOTPOSSTARI: + possessive = TRUE; + min = 0; + max = INT_MAX; + ecode++; + goto REPEATNOTCHAR; + + case OP_NOTPOSPLUS: + case OP_NOTPOSPLUSI: + possessive = TRUE; + min = 1; + max = INT_MAX; + ecode++; + goto REPEATNOTCHAR; + + case OP_NOTPOSQUERY: + case OP_NOTPOSQUERYI: + possessive = TRUE; + min = 0; + max = 1; + ecode++; + goto REPEATNOTCHAR; + + case OP_NOTPOSUPTO: + case OP_NOTPOSUPTOI: + possessive = TRUE; + min = 0; + max = GET2(ecode, 1); + ecode += 1 + IMM2_SIZE; + goto REPEATNOTCHAR; + + case OP_NOTSTAR: + case OP_NOTSTARI: + case OP_NOTMINSTAR: + case OP_NOTMINSTARI: + case OP_NOTPLUS: + case OP_NOTPLUSI: + case OP_NOTMINPLUS: + case OP_NOTMINPLUSI: + case OP_NOTQUERY: + case OP_NOTQUERYI: + case OP_NOTMINQUERY: + case OP_NOTMINQUERYI: + c = *ecode++ - ((op >= OP_NOTSTARI)? OP_NOTSTARI: OP_NOTSTAR); + minimize = (c & 1) != 0; + min = rep_min[c]; /* Pick up values from tables; */ + max = rep_max[c]; /* zero for max => infinity */ + if (max == 0) max = INT_MAX; + + /* Common code for all repeated single-byte matches. */ + + REPEATNOTCHAR: + GETCHARINCTEST(fc, ecode); + + /* The code is duplicated for the caseless and caseful cases, for speed, + since matching characters is likely to be quite common. First, ensure the + minimum number of matches are present. If min = max, continue at the same + level without recursing. Otherwise, if minimizing, keep trying the rest of + the expression and advancing one matching character if failing, up to the + maximum. Alternatively, if maximizing, find the maximum number of + characters and work backwards. */ + + if (op >= OP_NOTSTARI) /* Caseless */ + { +#ifdef SUPPORT_UNICODE + if (utf && fc > 127) + foc = UCD_OTHERCASE(fc); + else +#endif /* SUPPORT_UNICODE */ + foc = TABLE_GET(fc, mb->fcc, fc); + +#ifdef SUPPORT_UNICODE + if (utf) + { + register uint32_t d; + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINC(d, eptr); + if (fc == d || (uint32_t)foc == d) RRETURN(MATCH_NOMATCH); + } + } + else +#endif /* SUPPORT_UNICODE */ + /* Not UTF mode */ + { + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + if (fc == *eptr || foc == *eptr) RRETURN(MATCH_NOMATCH); + eptr++; + } + } + + if (min == max) continue; + + if (minimize) + { +#ifdef SUPPORT_UNICODE + if (utf) + { + register uint32_t d; + for (fi = min;; fi++) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM28); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINC(d, eptr); + if (fc == d || (uint32_t)foc == d) RRETURN(MATCH_NOMATCH); + } + } + else +#endif /*SUPPORT_UNICODE */ + /* Not UTF mode */ + { + for (fi = min;; fi++) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM29); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + if (fc == *eptr || foc == *eptr) RRETURN(MATCH_NOMATCH); + eptr++; + } + } + /* Control never gets here */ + } + + /* Maximize case */ + + else + { + pp = eptr; + +#ifdef SUPPORT_UNICODE + if (utf) + { + register uint32_t d; + for (i = min; i < max; i++) + { + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLEN(d, eptr, len); + if (fc == d || (uint32_t)foc == d) break; + eptr += len; + } + if (possessive) continue; /* No backtracking */ + + /* After \C in UTF mode, pp might be in the middle of a Unicode + character. Use <= pp to ensure backtracking doesn't go too far. */ + + for(;;) + { + if (eptr <= pp) goto TAIL_RECURSE; + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM30); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + eptr--; + BACKCHAR(eptr); + } + } + else +#endif /* SUPPORT_UNICODE */ + /* Not UTF mode */ + { + for (i = min; i < max; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + if (fc == *eptr || foc == *eptr) break; + eptr++; + } + if (possessive) continue; /* No backtracking */ + for (;;) + { + if (eptr == pp) goto TAIL_RECURSE; + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM31); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + eptr--; + } + } + /* Control never gets here */ + } + } + + /* Caseful comparisons */ + + else + { +#ifdef SUPPORT_UNICODE + if (utf) + { + register uint32_t d; + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINC(d, eptr); + if (fc == d) RRETURN(MATCH_NOMATCH); + } + } + else +#endif + /* Not UTF mode */ + { + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + if (fc == *eptr++) RRETURN(MATCH_NOMATCH); + } + } + + if (min == max) continue; + + if (minimize) + { +#ifdef SUPPORT_UNICODE + if (utf) + { + register uint32_t d; + for (fi = min;; fi++) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM32); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINC(d, eptr); + if (fc == d) RRETURN(MATCH_NOMATCH); + } + } + else +#endif + /* Not UTF mode */ + { + for (fi = min;; fi++) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM33); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + if (fc == *eptr++) RRETURN(MATCH_NOMATCH); + } + } + /* Control never gets here */ + } + + /* Maximize case */ + + else + { + pp = eptr; + +#ifdef SUPPORT_UNICODE + if (utf) + { + register uint32_t d; + for (i = min; i < max; i++) + { + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLEN(d, eptr, len); + if (fc == d) break; + eptr += len; + } + if (possessive) continue; /* No backtracking */ + + /* After \C in UTF mode, pp might be in the middle of a Unicode + character. Use <= pp to ensure backtracking doesn't go too far. */ + + for(;;) + { + if (eptr <= pp) goto TAIL_RECURSE; + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM34); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + eptr--; + BACKCHAR(eptr); + } + } + else +#endif + /* Not UTF mode */ + { + for (i = min; i < max; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + if (fc == *eptr) break; + eptr++; + } + if (possessive) continue; /* No backtracking */ + for (;;) + { + if (eptr == pp) goto TAIL_RECURSE; + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM35); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + eptr--; + } + } + /* Control never gets here */ + } + } + /* Control never gets here */ + + /* Match a single character type repeatedly; several different opcodes + share code. This is very similar to the code for single characters, but we + repeat it in the interests of efficiency. */ + + case OP_TYPEEXACT: + min = max = GET2(ecode, 1); + minimize = TRUE; + ecode += 1 + IMM2_SIZE; + goto REPEATTYPE; + + case OP_TYPEUPTO: + case OP_TYPEMINUPTO: + min = 0; + max = GET2(ecode, 1); + minimize = *ecode == OP_TYPEMINUPTO; + ecode += 1 + IMM2_SIZE; + goto REPEATTYPE; + + case OP_TYPEPOSSTAR: + possessive = TRUE; + min = 0; + max = INT_MAX; + ecode++; + goto REPEATTYPE; + + case OP_TYPEPOSPLUS: + possessive = TRUE; + min = 1; + max = INT_MAX; + ecode++; + goto REPEATTYPE; + + case OP_TYPEPOSQUERY: + possessive = TRUE; + min = 0; + max = 1; + ecode++; + goto REPEATTYPE; + + case OP_TYPEPOSUPTO: + possessive = TRUE; + min = 0; + max = GET2(ecode, 1); + ecode += 1 + IMM2_SIZE; + goto REPEATTYPE; + + case OP_TYPESTAR: + case OP_TYPEMINSTAR: + case OP_TYPEPLUS: + case OP_TYPEMINPLUS: + case OP_TYPEQUERY: + case OP_TYPEMINQUERY: + c = *ecode++ - OP_TYPESTAR; + minimize = (c & 1) != 0; + min = rep_min[c]; /* Pick up values from tables; */ + max = rep_max[c]; /* zero for max => infinity */ + if (max == 0) max = INT_MAX; + + /* Common code for all repeated single character type matches. Note that + in UTF-8 mode, '.' matches a character of any length, but for the other + character types, the valid characters are all one-byte long. */ + + REPEATTYPE: + ctype = *ecode++; /* Code for the character type */ + +#ifdef SUPPORT_UNICODE + if (ctype == OP_PROP || ctype == OP_NOTPROP) + { + prop_fail_result = ctype == OP_NOTPROP; + prop_type = *ecode++; + prop_value = *ecode++; + } + else prop_type = -1; +#endif + + /* First, ensure the minimum number of matches are present. Use inline + code for maximizing the speed, and do the type test once at the start + (i.e. keep it out of the loop). Separate the UTF-8 code completely as that + is tidier. Also separate the UCP code, which can be the same for both UTF-8 + and single-bytes. */ + + if (min > 0) + { +#ifdef SUPPORT_UNICODE + if (prop_type >= 0) + { + switch(prop_type) + { + case PT_ANY: + if (prop_fail_result) RRETURN(MATCH_NOMATCH); + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + } + break; + + case PT_LAMP: + for (i = 1; i <= min; i++) + { + int chartype; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + chartype = UCD_CHARTYPE(c); + if ((chartype == ucp_Lu || + chartype == ucp_Ll || + chartype == ucp_Lt) == prop_fail_result) + RRETURN(MATCH_NOMATCH); + } + break; + + case PT_GC: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + if ((UCD_CATEGORY(c) == prop_value) == prop_fail_result) + RRETURN(MATCH_NOMATCH); + } + break; + + case PT_PC: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + if ((UCD_CHARTYPE(c) == prop_value) == prop_fail_result) + RRETURN(MATCH_NOMATCH); + } + break; + + case PT_SC: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + if ((UCD_SCRIPT(c) == prop_value) == prop_fail_result) + RRETURN(MATCH_NOMATCH); + } + break; + + case PT_ALNUM: + for (i = 1; i <= min; i++) + { + int category; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + category = UCD_CATEGORY(c); + if ((category == ucp_L || category == ucp_N) == prop_fail_result) + RRETURN(MATCH_NOMATCH); + } + break; + + /* Perl space used to exclude VT, but from Perl 5.18 it is included, + which means that Perl space and POSIX space are now identical. PCRE + was changed at release 8.34. */ + + case PT_SPACE: /* Perl space */ + case PT_PXSPACE: /* POSIX space */ + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + switch(c) + { + HSPACE_CASES: + VSPACE_CASES: + if (prop_fail_result) RRETURN(MATCH_NOMATCH); + break; + + default: + if ((UCD_CATEGORY(c) == ucp_Z) == prop_fail_result) + RRETURN(MATCH_NOMATCH); + break; + } + } + break; + + case PT_WORD: + for (i = 1; i <= min; i++) + { + int category; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + category = UCD_CATEGORY(c); + if ((category == ucp_L || category == ucp_N || c == CHAR_UNDERSCORE) + == prop_fail_result) + RRETURN(MATCH_NOMATCH); + } + break; + + case PT_CLIST: + for (i = 1; i <= min; i++) + { + const uint32_t *cp; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + cp = PRIV(ucd_caseless_sets) + prop_value; + for (;;) + { + if (c < *cp) + { if (prop_fail_result) break; else { RRETURN(MATCH_NOMATCH); } } + if (c == *cp++) + { if (prop_fail_result) { RRETURN(MATCH_NOMATCH); } else break; } + } + } + break; + + case PT_UCNC: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + if ((c == CHAR_DOLLAR_SIGN || c == CHAR_COMMERCIAL_AT || + c == CHAR_GRAVE_ACCENT || (c >= 0xa0 && c <= 0xd7ff) || + c >= 0xe000) == prop_fail_result) + RRETURN(MATCH_NOMATCH); + } + break; + + /* This should not occur */ + + default: + RRETURN(PCRE2_ERROR_INTERNAL); + } + } + + /* Match extended Unicode sequences. We will get here only if the + support is in the binary; otherwise a compile-time error occurs. */ + + else if (ctype == OP_EXTUNI) + { + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + else + { + int lgb, rgb; + GETCHARINCTEST(c, eptr); + lgb = UCD_GRAPHBREAK(c); + while (eptr < mb->end_subject) + { + int len = 1; + if (!utf) c = *eptr; else { GETCHARLEN(c, eptr, len); } + rgb = UCD_GRAPHBREAK(c); + if ((PRIV(ucp_gbtable)[lgb] & (1 << rgb)) == 0) break; + lgb = rgb; + eptr += len; + } + } + CHECK_PARTIAL(); + } + } + + else +#endif /* SUPPORT_UNICODE */ + +/* Handle all other cases when the coding is UTF-8 */ + +#ifdef SUPPORT_UNICODE + if (utf) switch(ctype) + { + case OP_ANY: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + if (IS_NEWLINE(eptr)) RRETURN(MATCH_NOMATCH); + if (mb->partial != 0 && + eptr + 1 >= mb->end_subject && + NLBLOCK->nltype == NLTYPE_FIXED && + NLBLOCK->nllen == 2 && + UCHAR21(eptr) == NLBLOCK->nl[0]) + { + mb->hitend = TRUE; + if (mb->partial > 1) RRETURN(PCRE2_ERROR_PARTIAL); + } + eptr++; + ACROSSCHAR(eptr < mb->end_subject, *eptr, eptr++); + } + break; + + case OP_ALLANY: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + eptr++; + ACROSSCHAR(eptr < mb->end_subject, *eptr, eptr++); + } + break; + + case OP_ANYBYTE: + if (eptr > mb->end_subject - min) RRETURN(MATCH_NOMATCH); + eptr += min; + break; + + case OP_ANYNL: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINC(c, eptr); + switch(c) + { + default: RRETURN(MATCH_NOMATCH); + + case CHAR_CR: + if (eptr < mb->end_subject && UCHAR21(eptr) == CHAR_LF) eptr++; + break; + + case CHAR_LF: + break; + + case CHAR_VT: + case CHAR_FF: + case CHAR_NEL: +#ifndef EBCDIC + case 0x2028: + case 0x2029: +#endif /* Not EBCDIC */ + if (mb->bsr_convention == PCRE2_BSR_ANYCRLF) RRETURN(MATCH_NOMATCH); + break; + } + } + break; + + case OP_NOT_HSPACE: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINC(c, eptr); + switch(c) + { + HSPACE_CASES: RRETURN(MATCH_NOMATCH); /* Byte and multibyte cases */ + default: break; + } + } + break; + + case OP_HSPACE: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINC(c, eptr); + switch(c) + { + HSPACE_CASES: break; /* Byte and multibyte cases */ + default: RRETURN(MATCH_NOMATCH); + } + } + break; + + case OP_NOT_VSPACE: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINC(c, eptr); + switch(c) + { + VSPACE_CASES: RRETURN(MATCH_NOMATCH); + default: break; + } + } + break; + + case OP_VSPACE: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINC(c, eptr); + switch(c) + { + VSPACE_CASES: break; + default: RRETURN(MATCH_NOMATCH); + } + } + break; + + case OP_NOT_DIGIT: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINC(c, eptr); + if (c < 128 && (mb->ctypes[c] & ctype_digit) != 0) + RRETURN(MATCH_NOMATCH); + } + break; + + case OP_DIGIT: + for (i = 1; i <= min; i++) + { + uint32_t cc; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + cc = UCHAR21(eptr); + if (cc >= 128 || (mb->ctypes[cc] & ctype_digit) == 0) + RRETURN(MATCH_NOMATCH); + eptr++; + /* No need to skip more bytes - we know it's a 1-byte character */ + } + break; + + case OP_NOT_WHITESPACE: + for (i = 1; i <= min; i++) + { + uint32_t cc; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + cc = UCHAR21(eptr); + if (cc < 128 && (mb->ctypes[cc] & ctype_space) != 0) + RRETURN(MATCH_NOMATCH); + eptr++; + ACROSSCHAR(eptr < mb->end_subject, *eptr, eptr++); + } + break; + + case OP_WHITESPACE: + for (i = 1; i <= min; i++) + { + uint32_t cc; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + cc = UCHAR21(eptr); + if (cc >= 128 || (mb->ctypes[cc] & ctype_space) == 0) + RRETURN(MATCH_NOMATCH); + eptr++; + /* No need to skip more bytes - we know it's a 1-byte character */ + } + break; + + case OP_NOT_WORDCHAR: + for (i = 1; i <= min; i++) + { + uint32_t cc; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + cc = UCHAR21(eptr); + if (cc < 128 && (mb->ctypes[cc] & ctype_word) != 0) + RRETURN(MATCH_NOMATCH); + eptr++; + ACROSSCHAR(eptr < mb->end_subject, *eptr, eptr++); + } + break; + + case OP_WORDCHAR: + for (i = 1; i <= min; i++) + { + uint32_t cc; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + cc = UCHAR21(eptr); + if (cc >= 128 || (mb->ctypes[cc] & ctype_word) == 0) + RRETURN(MATCH_NOMATCH); + eptr++; + /* No need to skip more bytes - we know it's a 1-byte character */ + } + break; + + default: + RRETURN(PCRE2_ERROR_INTERNAL); + } /* End switch(ctype) */ + + else +#endif /* SUPPORT_UNICODE */ + + /* Code for the non-UTF-8 case for minimum matching of operators other + than OP_PROP and OP_NOTPROP. */ + + switch(ctype) + { + case OP_ANY: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + if (IS_NEWLINE(eptr)) RRETURN(MATCH_NOMATCH); + if (mb->partial != 0 && + eptr + 1 >= mb->end_subject && + NLBLOCK->nltype == NLTYPE_FIXED && + NLBLOCK->nllen == 2 && + *eptr == NLBLOCK->nl[0]) + { + mb->hitend = TRUE; + if (mb->partial > 1) RRETURN(PCRE2_ERROR_PARTIAL); + } + eptr++; + } + break; + + case OP_ALLANY: + if (eptr > mb->end_subject - min) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + eptr += min; + break; + + case OP_ANYBYTE: + if (eptr > mb->end_subject - min) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + eptr += min; + break; + + case OP_ANYNL: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + switch(*eptr++) + { + default: RRETURN(MATCH_NOMATCH); + + case CHAR_CR: + if (eptr < mb->end_subject && *eptr == CHAR_LF) eptr++; + break; + + case CHAR_LF: + break; + + case CHAR_VT: + case CHAR_FF: + case CHAR_NEL: +#if PCRE2_CODE_UNIT_WIDTH != 8 + case 0x2028: + case 0x2029: +#endif + if (mb->bsr_convention == PCRE2_BSR_ANYCRLF) RRETURN(MATCH_NOMATCH); + break; + } + } + break; + + case OP_NOT_HSPACE: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + switch(*eptr++) + { + default: break; + HSPACE_BYTE_CASES: +#if PCRE2_CODE_UNIT_WIDTH != 8 + HSPACE_MULTIBYTE_CASES: +#endif + RRETURN(MATCH_NOMATCH); + } + } + break; + + case OP_HSPACE: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + switch(*eptr++) + { + default: RRETURN(MATCH_NOMATCH); + HSPACE_BYTE_CASES: +#if PCRE2_CODE_UNIT_WIDTH != 8 + HSPACE_MULTIBYTE_CASES: +#endif + break; + } + } + break; + + case OP_NOT_VSPACE: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + switch(*eptr++) + { + VSPACE_BYTE_CASES: +#if PCRE2_CODE_UNIT_WIDTH != 8 + VSPACE_MULTIBYTE_CASES: +#endif + RRETURN(MATCH_NOMATCH); + default: break; + } + } + break; + + case OP_VSPACE: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + switch(*eptr++) + { + default: RRETURN(MATCH_NOMATCH); + VSPACE_BYTE_CASES: +#if PCRE2_CODE_UNIT_WIDTH != 8 + VSPACE_MULTIBYTE_CASES: +#endif + break; + } + } + break; + + case OP_NOT_DIGIT: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + if (MAX_255(*eptr) && (mb->ctypes[*eptr] & ctype_digit) != 0) + RRETURN(MATCH_NOMATCH); + eptr++; + } + break; + + case OP_DIGIT: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + if (!MAX_255(*eptr) || (mb->ctypes[*eptr] & ctype_digit) == 0) + RRETURN(MATCH_NOMATCH); + eptr++; + } + break; + + case OP_NOT_WHITESPACE: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + if (MAX_255(*eptr) && (mb->ctypes[*eptr] & ctype_space) != 0) + RRETURN(MATCH_NOMATCH); + eptr++; + } + break; + + case OP_WHITESPACE: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + if (!MAX_255(*eptr) || (mb->ctypes[*eptr] & ctype_space) == 0) + RRETURN(MATCH_NOMATCH); + eptr++; + } + break; + + case OP_NOT_WORDCHAR: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + if (MAX_255(*eptr) && (mb->ctypes[*eptr] & ctype_word) != 0) + RRETURN(MATCH_NOMATCH); + eptr++; + } + break; + + case OP_WORDCHAR: + for (i = 1; i <= min; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + if (!MAX_255(*eptr) || (mb->ctypes[*eptr] & ctype_word) == 0) + RRETURN(MATCH_NOMATCH); + eptr++; + } + break; + + default: + RRETURN(PCRE2_ERROR_INTERNAL); + } + } + + /* If min = max, continue at the same level without recursing */ + + if (min == max) continue; + + /* If minimizing, we have to test the rest of the pattern before each + subsequent match. Again, separate the UTF-8 case for speed, and also + separate the UCP cases. */ + + if (minimize) + { +#ifdef SUPPORT_UNICODE + if (prop_type >= 0) + { + switch(prop_type) + { + case PT_ANY: + for (fi = min;; fi++) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM36); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + if (prop_fail_result) RRETURN(MATCH_NOMATCH); + } + /* Control never gets here */ + + case PT_LAMP: + for (fi = min;; fi++) + { + int chartype; + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM37); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + chartype = UCD_CHARTYPE(c); + if ((chartype == ucp_Lu || + chartype == ucp_Ll || + chartype == ucp_Lt) == prop_fail_result) + RRETURN(MATCH_NOMATCH); + } + /* Control never gets here */ + + case PT_GC: + for (fi = min;; fi++) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM38); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + if ((UCD_CATEGORY(c) == prop_value) == prop_fail_result) + RRETURN(MATCH_NOMATCH); + } + /* Control never gets here */ + + case PT_PC: + for (fi = min;; fi++) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM39); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + if ((UCD_CHARTYPE(c) == prop_value) == prop_fail_result) + RRETURN(MATCH_NOMATCH); + } + /* Control never gets here */ + + case PT_SC: + for (fi = min;; fi++) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM40); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + if ((UCD_SCRIPT(c) == prop_value) == prop_fail_result) + RRETURN(MATCH_NOMATCH); + } + /* Control never gets here */ + + case PT_ALNUM: + for (fi = min;; fi++) + { + int category; + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM59); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + category = UCD_CATEGORY(c); + if ((category == ucp_L || category == ucp_N) == prop_fail_result) + RRETURN(MATCH_NOMATCH); + } + /* Control never gets here */ + + /* Perl space used to exclude VT, but from Perl 5.18 it is included, + which means that Perl space and POSIX space are now identical. PCRE + was changed at release 8.34. */ + + case PT_SPACE: /* Perl space */ + case PT_PXSPACE: /* POSIX space */ + for (fi = min;; fi++) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM61); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + switch(c) + { + HSPACE_CASES: + VSPACE_CASES: + if (prop_fail_result) RRETURN(MATCH_NOMATCH); + break; + + default: + if ((UCD_CATEGORY(c) == ucp_Z) == prop_fail_result) + RRETURN(MATCH_NOMATCH); + break; + } + } + /* Control never gets here */ + + case PT_WORD: + for (fi = min;; fi++) + { + int category; + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM62); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + category = UCD_CATEGORY(c); + if ((category == ucp_L || + category == ucp_N || + c == CHAR_UNDERSCORE) + == prop_fail_result) + RRETURN(MATCH_NOMATCH); + } + /* Control never gets here */ + + case PT_CLIST: + for (fi = min;; fi++) + { + const uint32_t *cp; + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM67); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + cp = PRIV(ucd_caseless_sets) + prop_value; + for (;;) + { + if (c < *cp) + { if (prop_fail_result) break; else { RRETURN(MATCH_NOMATCH); } } + if (c == *cp++) + { if (prop_fail_result) { RRETURN(MATCH_NOMATCH); } else break; } + } + } + /* Control never gets here */ + + case PT_UCNC: + for (fi = min;; fi++) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM60); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + GETCHARINCTEST(c, eptr); + if ((c == CHAR_DOLLAR_SIGN || c == CHAR_COMMERCIAL_AT || + c == CHAR_GRAVE_ACCENT || (c >= 0xa0 && c <= 0xd7ff) || + c >= 0xe000) == prop_fail_result) + RRETURN(MATCH_NOMATCH); + } + /* Control never gets here */ + + /* This should never occur */ + default: + RRETURN(PCRE2_ERROR_INTERNAL); + } + } + + /* Match extended Unicode sequences. We will get here only if the + support is in the binary; otherwise a compile-time error occurs. */ + + else if (ctype == OP_EXTUNI) + { + for (fi = min;; fi++) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM41); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + else + { + int lgb, rgb; + GETCHARINCTEST(c, eptr); + lgb = UCD_GRAPHBREAK(c); + while (eptr < mb->end_subject) + { + int len = 1; + if (!utf) c = *eptr; else { GETCHARLEN(c, eptr, len); } + rgb = UCD_GRAPHBREAK(c); + if ((PRIV(ucp_gbtable)[lgb] & (1 << rgb)) == 0) break; + lgb = rgb; + eptr += len; + } + } + CHECK_PARTIAL(); + } + } + else +#endif /* SUPPORT_UNICODE */ + +#ifdef SUPPORT_UNICODE + if (utf) + { + for (fi = min;; fi++) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM42); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + if (ctype == OP_ANY && IS_NEWLINE(eptr)) + RRETURN(MATCH_NOMATCH); + GETCHARINC(c, eptr); + switch(ctype) + { + case OP_ANY: /* This is the non-NL case */ + if (mb->partial != 0 && /* Take care with CRLF partial */ + eptr >= mb->end_subject && + NLBLOCK->nltype == NLTYPE_FIXED && + NLBLOCK->nllen == 2 && + c == NLBLOCK->nl[0]) + { + mb->hitend = TRUE; + if (mb->partial > 1) RRETURN(PCRE2_ERROR_PARTIAL); + } + break; + + case OP_ALLANY: + case OP_ANYBYTE: + break; + + case OP_ANYNL: + switch(c) + { + default: RRETURN(MATCH_NOMATCH); + case CHAR_CR: + if (eptr < mb->end_subject && UCHAR21(eptr) == CHAR_LF) eptr++; + break; + + case CHAR_LF: + break; + + case CHAR_VT: + case CHAR_FF: + case CHAR_NEL: +#ifndef EBCDIC + case 0x2028: + case 0x2029: +#endif /* Not EBCDIC */ + if (mb->bsr_convention == PCRE2_BSR_ANYCRLF) RRETURN(MATCH_NOMATCH); + break; + } + break; + + case OP_NOT_HSPACE: + switch(c) + { + HSPACE_CASES: RRETURN(MATCH_NOMATCH); + default: break; + } + break; + + case OP_HSPACE: + switch(c) + { + HSPACE_CASES: break; + default: RRETURN(MATCH_NOMATCH); + } + break; + + case OP_NOT_VSPACE: + switch(c) + { + VSPACE_CASES: RRETURN(MATCH_NOMATCH); + default: break; + } + break; + + case OP_VSPACE: + switch(c) + { + VSPACE_CASES: break; + default: RRETURN(MATCH_NOMATCH); + } + break; + + case OP_NOT_DIGIT: + if (c < 256 && (mb->ctypes[c] & ctype_digit) != 0) + RRETURN(MATCH_NOMATCH); + break; + + case OP_DIGIT: + if (c >= 256 || (mb->ctypes[c] & ctype_digit) == 0) + RRETURN(MATCH_NOMATCH); + break; + + case OP_NOT_WHITESPACE: + if (c < 256 && (mb->ctypes[c] & ctype_space) != 0) + RRETURN(MATCH_NOMATCH); + break; + + case OP_WHITESPACE: + if (c >= 256 || (mb->ctypes[c] & ctype_space) == 0) + RRETURN(MATCH_NOMATCH); + break; + + case OP_NOT_WORDCHAR: + if (c < 256 && (mb->ctypes[c] & ctype_word) != 0) + RRETURN(MATCH_NOMATCH); + break; + + case OP_WORDCHAR: + if (c >= 256 || (mb->ctypes[c] & ctype_word) == 0) + RRETURN(MATCH_NOMATCH); + break; + + default: + RRETURN(PCRE2_ERROR_INTERNAL); + } + } + } + else +#endif + /* Not UTF mode */ + { + for (fi = min;; fi++) + { + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM43); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + if (fi >= max) RRETURN(MATCH_NOMATCH); + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + RRETURN(MATCH_NOMATCH); + } + if (ctype == OP_ANY && IS_NEWLINE(eptr)) + RRETURN(MATCH_NOMATCH); + c = *eptr++; + switch(ctype) + { + case OP_ANY: /* This is the non-NL case */ + if (mb->partial != 0 && /* Take care with CRLF partial */ + eptr >= mb->end_subject && + NLBLOCK->nltype == NLTYPE_FIXED && + NLBLOCK->nllen == 2 && + c == NLBLOCK->nl[0]) + { + mb->hitend = TRUE; + if (mb->partial > 1) RRETURN(PCRE2_ERROR_PARTIAL); + } + break; + + case OP_ALLANY: + case OP_ANYBYTE: + break; + + case OP_ANYNL: + switch(c) + { + default: RRETURN(MATCH_NOMATCH); + case CHAR_CR: + if (eptr < mb->end_subject && *eptr == CHAR_LF) eptr++; + break; + + case CHAR_LF: + break; + + case CHAR_VT: + case CHAR_FF: + case CHAR_NEL: +#if PCRE2_CODE_UNIT_WIDTH != 8 + case 0x2028: + case 0x2029: +#endif + if (mb->bsr_convention == PCRE2_BSR_ANYCRLF) RRETURN(MATCH_NOMATCH); + break; + } + break; + + case OP_NOT_HSPACE: + switch(c) + { + default: break; + HSPACE_BYTE_CASES: +#if PCRE2_CODE_UNIT_WIDTH != 8 + HSPACE_MULTIBYTE_CASES: +#endif + RRETURN(MATCH_NOMATCH); + } + break; + + case OP_HSPACE: + switch(c) + { + default: RRETURN(MATCH_NOMATCH); + HSPACE_BYTE_CASES: +#if PCRE2_CODE_UNIT_WIDTH != 8 + HSPACE_MULTIBYTE_CASES: +#endif + break; + } + break; + + case OP_NOT_VSPACE: + switch(c) + { + default: break; + VSPACE_BYTE_CASES: +#if PCRE2_CODE_UNIT_WIDTH != 8 + VSPACE_MULTIBYTE_CASES: +#endif + RRETURN(MATCH_NOMATCH); + } + break; + + case OP_VSPACE: + switch(c) + { + default: RRETURN(MATCH_NOMATCH); + VSPACE_BYTE_CASES: +#if PCRE2_CODE_UNIT_WIDTH != 8 + VSPACE_MULTIBYTE_CASES: +#endif + break; + } + break; + + case OP_NOT_DIGIT: + if (MAX_255(c) && (mb->ctypes[c] & ctype_digit) != 0) RRETURN(MATCH_NOMATCH); + break; + + case OP_DIGIT: + if (!MAX_255(c) || (mb->ctypes[c] & ctype_digit) == 0) RRETURN(MATCH_NOMATCH); + break; + + case OP_NOT_WHITESPACE: + if (MAX_255(c) && (mb->ctypes[c] & ctype_space) != 0) RRETURN(MATCH_NOMATCH); + break; + + case OP_WHITESPACE: + if (!MAX_255(c) || (mb->ctypes[c] & ctype_space) == 0) RRETURN(MATCH_NOMATCH); + break; + + case OP_NOT_WORDCHAR: + if (MAX_255(c) && (mb->ctypes[c] & ctype_word) != 0) RRETURN(MATCH_NOMATCH); + break; + + case OP_WORDCHAR: + if (!MAX_255(c) || (mb->ctypes[c] & ctype_word) == 0) RRETURN(MATCH_NOMATCH); + break; + + default: + RRETURN(PCRE2_ERROR_INTERNAL); + } + } + } + /* Control never gets here */ + } + + /* If maximizing, it is worth using inline code for speed, doing the type + test once at the start (i.e. keep it out of the loop). Again, keep the + UTF-8 and UCP stuff separate. */ + + else + { + pp = eptr; /* Remember where we started */ + +#ifdef SUPPORT_UNICODE + if (prop_type >= 0) + { + switch(prop_type) + { + case PT_ANY: + for (i = min; i < max; i++) + { + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLENTEST(c, eptr, len); + if (prop_fail_result) break; + eptr+= len; + } + break; + + case PT_LAMP: + for (i = min; i < max; i++) + { + int chartype; + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLENTEST(c, eptr, len); + chartype = UCD_CHARTYPE(c); + if ((chartype == ucp_Lu || + chartype == ucp_Ll || + chartype == ucp_Lt) == prop_fail_result) + break; + eptr+= len; + } + break; + + case PT_GC: + for (i = min; i < max; i++) + { + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLENTEST(c, eptr, len); + if ((UCD_CATEGORY(c) == prop_value) == prop_fail_result) break; + eptr+= len; + } + break; + + case PT_PC: + for (i = min; i < max; i++) + { + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLENTEST(c, eptr, len); + if ((UCD_CHARTYPE(c) == prop_value) == prop_fail_result) break; + eptr+= len; + } + break; + + case PT_SC: + for (i = min; i < max; i++) + { + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLENTEST(c, eptr, len); + if ((UCD_SCRIPT(c) == prop_value) == prop_fail_result) break; + eptr+= len; + } + break; + + case PT_ALNUM: + for (i = min; i < max; i++) + { + int category; + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLENTEST(c, eptr, len); + category = UCD_CATEGORY(c); + if ((category == ucp_L || category == ucp_N) == prop_fail_result) + break; + eptr+= len; + } + break; + + /* Perl space used to exclude VT, but from Perl 5.18 it is included, + which means that Perl space and POSIX space are now identical. PCRE + was changed at release 8.34. */ + + case PT_SPACE: /* Perl space */ + case PT_PXSPACE: /* POSIX space */ + for (i = min; i < max; i++) + { + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLENTEST(c, eptr, len); + switch(c) + { + HSPACE_CASES: + VSPACE_CASES: + if (prop_fail_result) goto ENDLOOP99; /* Break the loop */ + break; + + default: + if ((UCD_CATEGORY(c) == ucp_Z) == prop_fail_result) + goto ENDLOOP99; /* Break the loop */ + break; + } + eptr+= len; + } + ENDLOOP99: + break; + + case PT_WORD: + for (i = min; i < max; i++) + { + int category; + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLENTEST(c, eptr, len); + category = UCD_CATEGORY(c); + if ((category == ucp_L || category == ucp_N || + c == CHAR_UNDERSCORE) == prop_fail_result) + break; + eptr+= len; + } + break; + + case PT_CLIST: + for (i = min; i < max; i++) + { + const uint32_t *cp; + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLENTEST(c, eptr, len); + cp = PRIV(ucd_caseless_sets) + prop_value; + for (;;) + { + if (c < *cp) + { if (prop_fail_result) break; else goto GOT_MAX; } + if (c == *cp++) + { if (prop_fail_result) goto GOT_MAX; else break; } + } + eptr += len; + } + GOT_MAX: + break; + + case PT_UCNC: + for (i = min; i < max; i++) + { + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLENTEST(c, eptr, len); + if ((c == CHAR_DOLLAR_SIGN || c == CHAR_COMMERCIAL_AT || + c == CHAR_GRAVE_ACCENT || (c >= 0xa0 && c <= 0xd7ff) || + c >= 0xe000) == prop_fail_result) + break; + eptr += len; + } + break; + + default: + RRETURN(PCRE2_ERROR_INTERNAL); + } + + /* eptr is now past the end of the maximum run */ + + if (possessive) continue; /* No backtracking */ + + /* After \C in UTF mode, pp might be in the middle of a Unicode + character. Use <= pp to ensure backtracking doesn't go too far. */ + + for(;;) + { + if (eptr <= pp) goto TAIL_RECURSE; + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM44); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + eptr--; + if (utf) BACKCHAR(eptr); + } + } + + /* Match extended Unicode grapheme clusters. We will get here only if the + support is in the binary; otherwise a compile-time error occurs. */ + + else if (ctype == OP_EXTUNI) + { + for (i = min; i < max; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + else + { + int lgb, rgb; + GETCHARINCTEST(c, eptr); + lgb = UCD_GRAPHBREAK(c); + while (eptr < mb->end_subject) + { + int len = 1; + if (!utf) c = *eptr; else { GETCHARLEN(c, eptr, len); } + rgb = UCD_GRAPHBREAK(c); + if ((PRIV(ucp_gbtable)[lgb] & (1 << rgb)) == 0) break; + lgb = rgb; + eptr += len; + } + } + CHECK_PARTIAL(); + } + + /* eptr is now past the end of the maximum run */ + + if (possessive) continue; /* No backtracking */ + + /* We use <= pp rather than == pp to detect the start of the run while + backtracking because the use of \C in UTF mode can cause BACKCHAR to + move back past pp. This is just palliative; the use of \C in UTF mode + is fraught with danger. */ + + for(;;) + { + int lgb, rgb; + PCRE2_SPTR fptr; + + if (eptr <= pp) goto TAIL_RECURSE; /* At start of char run */ + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM45); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + + /* Backtracking over an extended grapheme cluster involves inspecting + the previous two characters (if present) to see if a break is + permitted between them. */ + + eptr--; + if (!utf) c = *eptr; else + { + BACKCHAR(eptr); + GETCHAR(c, eptr); + } + rgb = UCD_GRAPHBREAK(c); + + for (;;) + { + if (eptr <= pp) goto TAIL_RECURSE; /* At start of char run */ + fptr = eptr - 1; + if (!utf) c = *fptr; else + { + BACKCHAR(fptr); + GETCHAR(c, fptr); + } + lgb = UCD_GRAPHBREAK(c); + if ((PRIV(ucp_gbtable)[lgb] & (1 << rgb)) == 0) break; + eptr = fptr; + rgb = lgb; + } + } + } + + else +#endif /* SUPPORT_UNICODE */ + +#ifdef SUPPORT_UNICODE + if (utf) + { + switch(ctype) + { + case OP_ANY: + for (i = min; i < max; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + if (IS_NEWLINE(eptr)) break; + if (mb->partial != 0 && /* Take care with CRLF partial */ + eptr + 1 >= mb->end_subject && + NLBLOCK->nltype == NLTYPE_FIXED && + NLBLOCK->nllen == 2 && + UCHAR21(eptr) == NLBLOCK->nl[0]) + { + mb->hitend = TRUE; + if (mb->partial > 1) RRETURN(PCRE2_ERROR_PARTIAL); + } + eptr++; + ACROSSCHAR(eptr < mb->end_subject, *eptr, eptr++); + } + break; + + case OP_ALLANY: + if (max < INT_MAX) + { + for (i = min; i < max; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + eptr++; + ACROSSCHAR(eptr < mb->end_subject, *eptr, eptr++); + } + } + else + { + eptr = mb->end_subject; /* Unlimited UTF-8 repeat */ + SCHECK_PARTIAL(); + } + break; + + /* The byte case is the same as non-UTF8 */ + + case OP_ANYBYTE: + c = max - min; + if (c > (uint32_t)(mb->end_subject - eptr)) + { + eptr = mb->end_subject; + SCHECK_PARTIAL(); + } + else eptr += c; + break; + + case OP_ANYNL: + for (i = min; i < max; i++) + { + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLEN(c, eptr, len); + if (c == CHAR_CR) + { + if (++eptr >= mb->end_subject) break; + if (UCHAR21(eptr) == CHAR_LF) eptr++; + } + else + { + if (c != CHAR_LF && + (mb->bsr_convention == PCRE2_BSR_ANYCRLF || + (c != CHAR_VT && c != CHAR_FF && c != CHAR_NEL +#ifndef EBCDIC + && c != 0x2028 && c != 0x2029 +#endif /* Not EBCDIC */ + ))) + break; + eptr += len; + } + } + break; + + case OP_NOT_HSPACE: + case OP_HSPACE: + for (i = min; i < max; i++) + { + BOOL gotspace; + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLEN(c, eptr, len); + switch(c) + { + HSPACE_CASES: gotspace = TRUE; break; + default: gotspace = FALSE; break; + } + if (gotspace == (ctype == OP_NOT_HSPACE)) break; + eptr += len; + } + break; + + case OP_NOT_VSPACE: + case OP_VSPACE: + for (i = min; i < max; i++) + { + BOOL gotspace; + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLEN(c, eptr, len); + switch(c) + { + VSPACE_CASES: gotspace = TRUE; break; + default: gotspace = FALSE; break; + } + if (gotspace == (ctype == OP_NOT_VSPACE)) break; + eptr += len; + } + break; + + case OP_NOT_DIGIT: + for (i = min; i < max; i++) + { + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLEN(c, eptr, len); + if (c < 256 && (mb->ctypes[c] & ctype_digit) != 0) break; + eptr+= len; + } + break; + + case OP_DIGIT: + for (i = min; i < max; i++) + { + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLEN(c, eptr, len); + if (c >= 256 ||(mb->ctypes[c] & ctype_digit) == 0) break; + eptr+= len; + } + break; + + case OP_NOT_WHITESPACE: + for (i = min; i < max; i++) + { + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLEN(c, eptr, len); + if (c < 256 && (mb->ctypes[c] & ctype_space) != 0) break; + eptr+= len; + } + break; + + case OP_WHITESPACE: + for (i = min; i < max; i++) + { + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLEN(c, eptr, len); + if (c >= 256 ||(mb->ctypes[c] & ctype_space) == 0) break; + eptr+= len; + } + break; + + case OP_NOT_WORDCHAR: + for (i = min; i < max; i++) + { + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLEN(c, eptr, len); + if (c < 256 && (mb->ctypes[c] & ctype_word) != 0) break; + eptr+= len; + } + break; + + case OP_WORDCHAR: + for (i = min; i < max; i++) + { + int len = 1; + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + GETCHARLEN(c, eptr, len); + if (c >= 256 || (mb->ctypes[c] & ctype_word) == 0) break; + eptr+= len; + } + break; + + default: + RRETURN(PCRE2_ERROR_INTERNAL); + } + + if (possessive) continue; /* No backtracking */ + + /* After \C in UTF mode, pp might be in the middle of a Unicode + character. Use <= pp to ensure backtracking doesn't go too far. */ + + for(;;) + { + if (eptr <= pp) goto TAIL_RECURSE; + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM46); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + eptr--; + BACKCHAR(eptr); + if (ctype == OP_ANYNL && eptr > pp && UCHAR21(eptr) == CHAR_NL && + UCHAR21(eptr - 1) == CHAR_CR) eptr--; + } + } + else +#endif /* SUPPORT_UNICODE */ + /* Not UTF mode */ + { + switch(ctype) + { + case OP_ANY: + for (i = min; i < max; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + if (IS_NEWLINE(eptr)) break; + if (mb->partial != 0 && /* Take care with CRLF partial */ + eptr + 1 >= mb->end_subject && + NLBLOCK->nltype == NLTYPE_FIXED && + NLBLOCK->nllen == 2 && + *eptr == NLBLOCK->nl[0]) + { + mb->hitend = TRUE; + if (mb->partial > 1) RRETURN(PCRE2_ERROR_PARTIAL); + } + eptr++; + } + break; + + case OP_ALLANY: + case OP_ANYBYTE: + c = max - min; + if (c > (uint32_t)(mb->end_subject - eptr)) + { + eptr = mb->end_subject; + SCHECK_PARTIAL(); + } + else eptr += c; + break; + + case OP_ANYNL: + for (i = min; i < max; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + c = *eptr; + if (c == CHAR_CR) + { + if (++eptr >= mb->end_subject) break; + if (*eptr == CHAR_LF) eptr++; + } + else + { + if (c != CHAR_LF && (mb->bsr_convention == PCRE2_BSR_ANYCRLF || + (c != CHAR_VT && c != CHAR_FF && c != CHAR_NEL +#if PCRE2_CODE_UNIT_WIDTH != 8 + && c != 0x2028 && c != 0x2029 +#endif + ))) break; + eptr++; + } + } + break; + + case OP_NOT_HSPACE: + for (i = min; i < max; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + switch(*eptr) + { + default: eptr++; break; + HSPACE_BYTE_CASES: +#if PCRE2_CODE_UNIT_WIDTH != 8 + HSPACE_MULTIBYTE_CASES: +#endif + goto ENDLOOP00; + } + } + ENDLOOP00: + break; + + case OP_HSPACE: + for (i = min; i < max; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + switch(*eptr) + { + default: goto ENDLOOP01; + HSPACE_BYTE_CASES: +#if PCRE2_CODE_UNIT_WIDTH != 8 + HSPACE_MULTIBYTE_CASES: +#endif + eptr++; break; + } + } + ENDLOOP01: + break; + + case OP_NOT_VSPACE: + for (i = min; i < max; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + switch(*eptr) + { + default: eptr++; break; + VSPACE_BYTE_CASES: +#if PCRE2_CODE_UNIT_WIDTH != 8 + VSPACE_MULTIBYTE_CASES: +#endif + goto ENDLOOP02; + } + } + ENDLOOP02: + break; + + case OP_VSPACE: + for (i = min; i < max; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + switch(*eptr) + { + default: goto ENDLOOP03; + VSPACE_BYTE_CASES: +#if PCRE2_CODE_UNIT_WIDTH != 8 + VSPACE_MULTIBYTE_CASES: +#endif + eptr++; break; + } + } + ENDLOOP03: + break; + + case OP_NOT_DIGIT: + for (i = min; i < max; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + if (MAX_255(*eptr) && (mb->ctypes[*eptr] & ctype_digit) != 0) break; + eptr++; + } + break; + + case OP_DIGIT: + for (i = min; i < max; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + if (!MAX_255(*eptr) || (mb->ctypes[*eptr] & ctype_digit) == 0) break; + eptr++; + } + break; + + case OP_NOT_WHITESPACE: + for (i = min; i < max; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + if (MAX_255(*eptr) && (mb->ctypes[*eptr] & ctype_space) != 0) break; + eptr++; + } + break; + + case OP_WHITESPACE: + for (i = min; i < max; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + if (!MAX_255(*eptr) || (mb->ctypes[*eptr] & ctype_space) == 0) break; + eptr++; + } + break; + + case OP_NOT_WORDCHAR: + for (i = min; i < max; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + if (MAX_255(*eptr) && (mb->ctypes[*eptr] & ctype_word) != 0) break; + eptr++; + } + break; + + case OP_WORDCHAR: + for (i = min; i < max; i++) + { + if (eptr >= mb->end_subject) + { + SCHECK_PARTIAL(); + break; + } + if (!MAX_255(*eptr) || (mb->ctypes[*eptr] & ctype_word) == 0) break; + eptr++; + } + break; + + default: + RRETURN(PCRE2_ERROR_INTERNAL); + } + + if (possessive) continue; /* No backtracking */ + for (;;) + { + if (eptr == pp) goto TAIL_RECURSE; + RMATCH(eptr, ecode, offset_top, mb, eptrb, RM47); + if (rrc != MATCH_NOMATCH) RRETURN(rrc); + eptr--; + if (ctype == OP_ANYNL && eptr > pp && *eptr == CHAR_LF && + eptr[-1] == CHAR_CR) eptr--; + } + } + + /* Control never gets here */ + } + + /* There's been some horrible disaster. Arrival here can only mean there is + something seriously wrong in the code above or the OP_xxx definitions. */ + + default: + RRETURN(PCRE2_ERROR_INTERNAL); + } + + /* Do not stick any code in here without much thought; it is assumed + that "continue" in the code above comes out to here to repeat the main + loop. */ + + } /* End of main loop */ +/* Control never reaches here */ + + +/* When compiling to use the heap rather than the stack for recursive calls to +match(), the RRETURN() macro jumps here. The number that is saved in +frame->Xwhere indicates which label we actually want to return to. */ + +#ifdef HEAP_MATCH_RECURSE +#define LBL(val) case val: goto L_RM##val; +HEAP_RETURN: +switch (frame->Xwhere) + { + LBL( 1) LBL( 2) LBL( 3) LBL( 4) LBL( 5) LBL( 6) LBL( 7) LBL( 8) + LBL( 9) LBL(10) LBL(11) LBL(12) LBL(13) LBL(14) LBL(15) LBL(17) + LBL(19) LBL(24) LBL(25) LBL(26) LBL(27) LBL(29) LBL(31) LBL(33) + LBL(35) LBL(43) LBL(47) LBL(48) LBL(49) LBL(50) LBL(51) LBL(52) + LBL(53) LBL(54) LBL(55) LBL(56) LBL(57) LBL(58) LBL(63) LBL(64) + LBL(65) LBL(66) LBL(68) +#ifdef SUPPORT_WIDE_CHARS + LBL(20) LBL(21) +#endif +#ifdef SUPPORT_UNICODE + LBL(16) LBL(18) + LBL(22) LBL(23) LBL(28) LBL(30) + LBL(32) LBL(34) LBL(42) LBL(46) + LBL(36) LBL(37) LBL(38) LBL(39) LBL(40) LBL(41) LBL(44) LBL(45) + LBL(59) LBL(60) LBL(61) LBL(62) LBL(67) +#endif /* SUPPORT_UNICODE */ + default: + return PCRE2_ERROR_INTERNAL; + } +#undef LBL +#endif /* HEAP_MATCH_RECURSE */ +} + + +/*************************************************************************** +**************************************************************************** + RECURSION IN THE match() FUNCTION + +Undefine all the macros that were defined above to handle this. */ + +#ifdef HEAP_MATCH_RECURSE +#undef eptr +#undef ecode +#undef mstart +#undef offset_top +#undef eptrb +#undef flags + +#undef callpat +#undef charptr +#undef data +#undef next_ecode +#undef pp +#undef prev +#undef saved_eptr + +#undef new_recursive + +#undef cur_is_word +#undef condition +#undef prev_is_word + +#undef ctype +#undef length +#undef max +#undef min +#undef number +#undef offset +#undef op +#undef save_capture_last +#undef save_offset1 +#undef save_offset2 +#undef save_offset3 + +#undef newptrb +#endif /* HEAP_MATCH_RECURSE */ + +/* These two are defined as macros in both cases */ + +#undef fc +#undef fi + +/*************************************************************************** +***************************************************************************/ + + +#ifdef HEAP_MATCH_RECURSE +/************************************************* +* Release allocated heap frames * +*************************************************/ + +/* This function releases all the allocated frames. The base frame is on the +machine stack, and so must not be freed. + +Argument: + frame_base the address of the base frame + mb the match block + +Returns: nothing +*/ + +static void +release_match_heapframes (heapframe *frame_base, match_block *mb) +{ +heapframe *nextframe = frame_base->Xnextframe; +while (nextframe != NULL) + { + heapframe *oldframe = nextframe; + nextframe = nextframe->Xnextframe; + mb->stack_memctl.free(oldframe, mb->stack_memctl.memory_data); + } +} +#endif /* HEAP_MATCH_RECURSE */ + + + +/************************************************* +* Match a Regular Expression * +*************************************************/ + +/* This function applies a compiled pattern to a subject string and picks out +portions of the string if it matches. Two elements in the vector are set for +each substring: the offsets to the start and end of the substring. + +Arguments: + code points to the compiled expression + subject points to the subject string + length length of subject string (may contain binary zeros) + start_offset where to start in the subject string + options option bits + match_data points to a match_data block + mcontext points a PCRE2 context + +Returns: > 0 => success; value is the number of ovector pairs filled + = 0 => success, but ovector is not big enough + -1 => failed to match (PCRE2_ERROR_NOMATCH) + -2 => partial match (PCRE2_ERROR_PARTIAL) + < -2 => some kind of unexpected problem +*/ + +PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION +pcre2_match(const pcre2_code *code, PCRE2_SPTR subject, PCRE2_SIZE length, + PCRE2_SIZE start_offset, uint32_t options, pcre2_match_data *match_data, + pcre2_match_context *mcontext) +{ +int rc; +int ocount; + +const uint8_t *start_bits = NULL; + +const pcre2_real_code *re = (const pcre2_real_code *)code; + +BOOL anchored; +BOOL firstline; +BOOL has_first_cu = FALSE; +BOOL has_req_cu = FALSE; +BOOL startline; +BOOL using_temporary_offsets = FALSE; +BOOL utf; + +PCRE2_UCHAR first_cu = 0; +PCRE2_UCHAR first_cu2 = 0; +PCRE2_UCHAR req_cu = 0; +PCRE2_UCHAR req_cu2 = 0; + +PCRE2_SPTR bumpalong_limit; +PCRE2_SPTR end_subject; +PCRE2_SPTR start_match = subject + start_offset; +PCRE2_SPTR req_cu_ptr = start_match - 1; +PCRE2_SPTR start_partial = NULL; +PCRE2_SPTR match_partial = NULL; + +/* We need to have mb pointing to a match block, because the IS_NEWLINE macro +is used below, and it expects NLBLOCK to be defined as a pointer. */ + +match_block actual_match_block; +match_block *mb = &actual_match_block; + +#ifdef HEAP_MATCH_RECURSE +heapframe frame_zero; +frame_zero.Xprevframe = NULL; /* Marks the top level */ +frame_zero.Xnextframe = NULL; /* None are allocated yet */ +mb->match_frames_base = &frame_zero; +#endif + +/* A length equal to PCRE2_ZERO_TERMINATED implies a zero-terminated +subject string. */ + +if (length == PCRE2_ZERO_TERMINATED) length = PRIV(strlen)(subject); +end_subject = subject + length; + +/* Plausibility checks */ + +if ((options & ~PUBLIC_MATCH_OPTIONS) != 0) return PCRE2_ERROR_BADOPTION; +if (code == NULL || subject == NULL || match_data == NULL) + return PCRE2_ERROR_NULL; +if (start_offset > length) return PCRE2_ERROR_BADOFFSET; + +/* Check that the first field in the block is the magic number. */ + +if (re->magic_number != MAGIC_NUMBER) return PCRE2_ERROR_BADMAGIC; + +/* Check the code unit width. */ + +if ((re->flags & PCRE2_MODE_MASK) != PCRE2_CODE_UNIT_WIDTH/8) + return PCRE2_ERROR_BADMODE; + +/* PCRE2_NOTEMPTY and PCRE2_NOTEMPTY_ATSTART are match-time flags in the +options variable for this function. Users of PCRE2 who are not calling the +function directly would like to have a way of setting these flags, in the same +way that they can set pcre2_compile() flags like PCRE2_NO_AUTOPOSSESS with +constructions like (*NO_AUTOPOSSESS). To enable this, (*NOTEMPTY) and +(*NOTEMPTY_ATSTART) set bits in the pattern's "flag" function which can now be +transferred to the options for this function. The bits are guaranteed to be +adjacent, but do not have the same values. This bit of Boolean trickery assumes +that the match-time bits are not more significant than the flag bits. If by +accident this is not the case, a compile-time division by zero error will +occur. */ + +#define FF (PCRE2_NOTEMPTY_SET|PCRE2_NE_ATST_SET) +#define OO (PCRE2_NOTEMPTY|PCRE2_NOTEMPTY_ATSTART) +options |= (re->flags & FF) / ((FF & (~FF+1)) / (OO & (~OO+1))); +#undef FF +#undef OO + +/* A NULL match context means "use a default context" */ + +if (mcontext == NULL) + mcontext = (pcre2_match_context *)(&PRIV(default_match_context)); + +/* These two settings are used in the code for checking a UTF string that +follows immediately afterwards. Other values in the mb block are used only +during interpretive pcre_match() processing, not when the JIT support is in +use, so they are set up later. */ + +utf = (re->overall_options & PCRE2_UTF) != 0; +mb->partial = ((options & PCRE2_PARTIAL_HARD) != 0)? 2 : + ((options & PCRE2_PARTIAL_SOFT) != 0)? 1 : 0; + +/* Check a UTF string for validity if required. For 8-bit and 16-bit strings, +we must also check that a starting offset does not point into the middle of a +multiunit character. We check only the portion of the subject that is going to +be inspected during matching - from the offset minus the maximum back reference +to the given length. This saves time when a small part of a large subject is +being matched by the use of a starting offset. Note that the maximum lookbehind +is a number of characters, not code units. */ + +#ifdef SUPPORT_UNICODE +if (utf && (options & PCRE2_NO_UTF_CHECK) == 0) + { + PCRE2_SPTR check_subject = start_match; /* start_match includes offset */ + + if (start_offset > 0) + { +#if PCRE2_CODE_UNIT_WIDTH != 32 + unsigned int i; + if (start_match < end_subject && NOT_FIRSTCU(*start_match)) + return PCRE2_ERROR_BADUTFOFFSET; + for (i = re->max_lookbehind; i > 0 && check_subject > subject; i--) + { + check_subject--; + while (check_subject > subject && +#if PCRE2_CODE_UNIT_WIDTH == 8 + (*check_subject & 0xc0) == 0x80) +#else /* 16-bit */ + (*check_subject & 0xfc00) == 0xdc00) +#endif /* PCRE2_CODE_UNIT_WIDTH == 8 */ + check_subject--; + } +#else + /* In the 32-bit library, one code unit equals one character. However, + we cannot just subtract the lookbehind and then compare pointers, because + a very large lookbehind could create an invalid pointer. */ + + if (start_offset >= re->max_lookbehind) + check_subject -= re->max_lookbehind; + else + check_subject = subject; +#endif /* PCRE2_CODE_UNIT_WIDTH != 32 */ + } + + /* Validate the relevant portion of the subject. After an error, adjust the + offset to be an absolute offset in the whole string. */ + + match_data->rc = PRIV(valid_utf)(check_subject, + length - (check_subject - subject), &(match_data->startchar)); + if (match_data->rc != 0) + { + match_data->startchar += check_subject - subject; + return match_data->rc; + } + } +#endif /* SUPPORT_UNICODE */ + +/* It is an error to set an offset limit without setting the flag at compile +time. */ + +if (mcontext->offset_limit != PCRE2_UNSET && + (re->overall_options & PCRE2_USE_OFFSET_LIMIT) == 0) + return PCRE2_ERROR_BADOFFSETLIMIT; + +/* If the pattern was successfully studied with JIT support, run the JIT +executable instead of the rest of this function. Most options must be set at +compile time for the JIT code to be usable. Fallback to the normal code path if +an unsupported option is set or if JIT returns BADOPTION (which means that the +selected normal or partial matching mode was not compiled). */ + +#ifdef SUPPORT_JIT +if (re->executable_jit != NULL && (options & ~PUBLIC_JIT_MATCH_OPTIONS) == 0) + { + rc = pcre2_jit_match(code, subject, length, start_offset, options, + match_data, mcontext); + if (rc != PCRE2_ERROR_JIT_BADOPTION) return rc; + } +#endif + +/* Carry on with non-JIT matching. */ + +anchored = ((re->overall_options | options) & PCRE2_ANCHORED) != 0; +firstline = (re->overall_options & PCRE2_FIRSTLINE) != 0; +startline = (re->flags & PCRE2_STARTLINE) != 0; +bumpalong_limit = (mcontext->offset_limit == PCRE2_UNSET)? + end_subject : subject + mcontext->offset_limit; + +/* Fill in the fields in the match block. */ + +mb->callout = mcontext->callout; +mb->callout_data = mcontext->callout_data; +mb->memctl = mcontext->memctl; +#ifdef HEAP_MATCH_RECURSE +mb->stack_memctl = mcontext->stack_memctl; +#endif + +mb->start_subject = subject; +mb->start_offset = start_offset; +mb->end_subject = end_subject; +mb->hasthen = (re->flags & PCRE2_HASTHEN) != 0; + +mb->moptions = options; /* Match options */ +mb->poptions = re->overall_options; /* Pattern options */ + +mb->ignore_skip_arg = 0; +mb->mark = mb->nomatch_mark = NULL; /* In case never set */ +mb->recursive = NULL; /* No recursion at top level */ +mb->ovecsave_chain = NULL; /* No ovecsave blocks yet */ +mb->hitend = FALSE; + +/* The name table is needed for finding all the numbers associated with a +given name, for condition testing. The code follows the name table. */ + +mb->name_table = (PCRE2_UCHAR *)((uint8_t *)re + sizeof(pcre2_real_code)); +mb->name_count = re->name_count; +mb->name_entry_size = re->name_entry_size; +mb->start_code = mb->name_table + re->name_count * re->name_entry_size; + +/* Limits set in the pattern override the match context only if they are +smaller. */ + +mb->match_limit = (mcontext->match_limit < re->limit_match)? + mcontext->match_limit : re->limit_match; +mb->match_limit_recursion = (mcontext->recursion_limit < re->limit_recursion)? + mcontext->recursion_limit : re->limit_recursion; + +/* Pointers to the individual character tables */ + +mb->lcc = re->tables + lcc_offset; +mb->fcc = re->tables + fcc_offset; +mb->ctypes = re->tables + ctypes_offset; + +/* Process the \R and newline settings. */ + +mb->bsr_convention = re->bsr_convention; +mb->nltype = NLTYPE_FIXED; +switch(re->newline_convention) + { + case PCRE2_NEWLINE_CR: + mb->nllen = 1; + mb->nl[0] = CHAR_CR; + break; + + case PCRE2_NEWLINE_LF: + mb->nllen = 1; + mb->nl[0] = CHAR_NL; + break; + + case PCRE2_NEWLINE_CRLF: + mb->nllen = 2; + mb->nl[0] = CHAR_CR; + mb->nl[1] = CHAR_NL; + break; + + case PCRE2_NEWLINE_ANY: + mb->nltype = NLTYPE_ANY; + break; + + case PCRE2_NEWLINE_ANYCRLF: + mb->nltype = NLTYPE_ANYCRLF; + break; + + default: return PCRE2_ERROR_INTERNAL; + } + +/* If the expression has got more back references than the offsets supplied can +hold, we get a temporary chunk of memory to use during the matching. Otherwise, +we can use the vector supplied. The size of the ovector is three times the +value in the oveccount field. Two-thirds of it is pairs for storing matching +offsets, and the top third is working space. */ + +if (re->top_backref >= match_data->oveccount) + { + ocount = re->top_backref * 3 + 3; + mb->ovector = (PCRE2_SIZE *)(mb->memctl.malloc(ocount * sizeof(PCRE2_SIZE), + mb->memctl.memory_data)); + if (mb->ovector == NULL) return PCRE2_ERROR_NOMEMORY; + using_temporary_offsets = TRUE; + } +else + { + ocount = 3 * match_data->oveccount; + mb->ovector = match_data->ovector; + } + +mb->offset_end = ocount; +mb->offset_max = (2*ocount)/3; + +/* Reset the working variable associated with each extraction. These should +never be used unless previously set, but they get saved and restored, and so we +initialize them to avoid reading uninitialized locations. Also, unset the +offsets for the matched string. This is really just for tidiness with callouts, +in case they inspect these fields. */ + +if (ocount > 0) + { + register PCRE2_SIZE *iptr = mb->ovector + ocount; + register PCRE2_SIZE *iend = iptr - re->top_bracket; + if (iend < mb->ovector + 2) iend = mb->ovector + 2; + while (--iptr >= iend) *iptr = PCRE2_UNSET; + mb->ovector[0] = mb->ovector[1] = PCRE2_UNSET; + } + +/* Set up the first code unit to match, if available. The first_codeunit value +is never set for an anchored regular expression, but the anchoring may be +forced at run time, so we have to test for anchoring. The first code unit may +be unset for an unanchored pattern, of course. If there's no first code unit +there may be a bitmap of possible first characters. */ + +if (!anchored) + { + if ((re->flags & PCRE2_FIRSTSET) != 0) + { + has_first_cu = TRUE; + first_cu = first_cu2 = (PCRE2_UCHAR)(re->first_codeunit); + if ((re->flags & PCRE2_FIRSTCASELESS) != 0) + { + first_cu2 = TABLE_GET(first_cu, mb->fcc, first_cu); +#if defined SUPPORT_UNICODE && PCRE2_CODE_UNIT_WIDTH != 8 + if (utf && first_cu > 127) first_cu2 = UCD_OTHERCASE(first_cu); +#endif + } + } + else + if (!startline && (re->flags & PCRE2_FIRSTMAPSET) != 0) + start_bits = re->start_bitmap; + } + +/* For anchored or unanchored matches, there may be a "last known required +character" set. */ + +if ((re->flags & PCRE2_LASTSET) != 0) + { + has_req_cu = TRUE; + req_cu = req_cu2 = (PCRE2_UCHAR)(re->last_codeunit); + if ((re->flags & PCRE2_LASTCASELESS) != 0) + { + req_cu2 = TABLE_GET(req_cu, mb->fcc, req_cu); +#if defined SUPPORT_UNICODE && PCRE2_CODE_UNIT_WIDTH != 8 + if (utf && req_cu > 127) req_cu2 = UCD_OTHERCASE(req_cu); +#endif + } + } + + +/* ==========================================================================*/ + +/* Loop for handling unanchored repeated matching attempts; for anchored regexs +the loop runs just once. */ + +for(;;) + { + PCRE2_SPTR new_start_match; + mb->capture_last = 0; + + /* ----------------- Start of match optimizations ---------------- */ + + /* There are some optimizations that avoid running the match if a known + starting point is not found, or if a known later code unit is not present. + However, there is an option (settable at compile time) that disables these, + for testing and for ensuring that all callouts do actually occur. */ + + if ((re->overall_options & PCRE2_NO_START_OPTIMIZE) == 0) + { + PCRE2_SPTR save_end_subject = end_subject; + + /* If firstline is TRUE, the start of the match is constrained to the first + line of a multiline string. That is, the match must be before or at the + first newline. Implement this by temporarily adjusting end_subject so that + we stop the optimization scans at a newline. If the match fails at the + newline, later code breaks this loop. */ + + if (firstline) + { + PCRE2_SPTR t = start_match; +#ifdef SUPPORT_UNICODE + if (utf) + { + while (t < mb->end_subject && !IS_NEWLINE(t)) + { + t++; + ACROSSCHAR(t < end_subject, *t, t++); + } + } + else +#endif + while (t < mb->end_subject && !IS_NEWLINE(t)) t++; + end_subject = t; + } + + /* Advance to a unique first code unit if there is one. In 8-bit mode, the + use of memchr() gives a big speed up. */ + + if (has_first_cu) + { + PCRE2_UCHAR smc; + if (first_cu != first_cu2) + while (start_match < end_subject && + (smc = UCHAR21TEST(start_match)) != first_cu && smc != first_cu2) + start_match++; + else + { +#if PCRE2_CODE_UNIT_WIDTH != 8 + while (start_match < end_subject && UCHAR21TEST(start_match) != first_cu) + start_match++; +#else + start_match = memchr(start_match, first_cu, end_subject - start_match); + if (start_match == NULL) start_match = end_subject; +#endif + } + } + + /* Or to just after a linebreak for a multiline match */ + + else if (startline) + { + if (start_match > mb->start_subject + start_offset) + { +#ifdef SUPPORT_UNICODE + if (utf) + { + while (start_match < end_subject && !WAS_NEWLINE(start_match)) + { + start_match++; + ACROSSCHAR(start_match < end_subject, *start_match, + start_match++); + } + } + else +#endif + while (start_match < end_subject && !WAS_NEWLINE(start_match)) + start_match++; + + /* If we have just passed a CR and the newline option is ANY or + ANYCRLF, and we are now at a LF, advance the match position by one more + code unit. */ + + if (start_match[-1] == CHAR_CR && + (mb->nltype == NLTYPE_ANY || mb->nltype == NLTYPE_ANYCRLF) && + start_match < end_subject && + UCHAR21TEST(start_match) == CHAR_NL) + start_match++; + } + } + + /* Or to a non-unique first code unit if any have been identified. The + bitmap contains only 256 bits. When code units are 16 or 32 bits wide, all + code units greater than 254 set the 255 bit. */ + + else if (start_bits != NULL) + { + while (start_match < end_subject) + { + register uint32_t c = UCHAR21TEST(start_match); +#if PCRE2_CODE_UNIT_WIDTH != 8 + if (c > 255) c = 255; +#endif + if ((start_bits[c/8] & (1 << (c&7))) != 0) break; + start_match++; + } + } + + /* Restore fudged end_subject */ + + end_subject = save_end_subject; + + /* The following two optimizations are disabled for partial matching. */ + + if (!mb->partial) + { + /* The minimum matching length is a lower bound; no actual string of that + length may actually match the pattern. Although the value is, strictly, + in characters, we treat it as code units to avoid spending too much time + in this optimization. */ + + if (end_subject - start_match < re->minlength) + { + rc = MATCH_NOMATCH; + break; + } + + /* If req_cu is set, we know that that code unit must appear in the + subject for the match to succeed. If the first code unit is set, req_cu + must be later in the subject; otherwise the test starts at the match + point. This optimization can save a huge amount of backtracking in + patterns with nested unlimited repeats that aren't going to match. + Writing separate code for cased/caseless versions makes it go faster, as + does using an autoincrement and backing off on a match. + + HOWEVER: when the subject string is very, very long, searching to its end + can take a long time, and give bad performance on quite ordinary + patterns. This showed up when somebody was matching something like + /^\d+C/ on a 32-megabyte string... so we don't do this when the string is + sufficiently long. */ + + if (has_req_cu && end_subject - start_match < REQ_CU_MAX) + { + register PCRE2_SPTR p = start_match + (has_first_cu? 1:0); + + /* We don't need to repeat the search if we haven't yet reached the + place we found it at last time. */ + + if (p > req_cu_ptr) + { + if (req_cu != req_cu2) + { + while (p < end_subject) + { + register uint32_t pp = UCHAR21INCTEST(p); + if (pp == req_cu || pp == req_cu2) { p--; break; } + } + } + else + { + while (p < end_subject) + { + if (UCHAR21INCTEST(p) == req_cu) { p--; break; } + } + } + + /* If we can't find the required code unit, break the matching loop, + forcing a match failure. */ + + if (p >= end_subject) + { + rc = MATCH_NOMATCH; + break; + } + + /* If we have found the required code unit, save the point where we + found it, so that we don't search again next time round the loop if + the start hasn't passed this code unit yet. */ + + req_cu_ptr = p; + } + } + } + } + + /* ------------ End of start of match optimizations ------------ */ + + /* Give no match if we have passed the bumpalong limit. */ + + if (start_match > bumpalong_limit) + { + rc = MATCH_NOMATCH; + break; + } + + /* OK, we can now run the match. If "hitend" is set afterwards, remember the + first starting point for which a partial match was found. */ + + mb->start_match_ptr = start_match; + mb->start_used_ptr = start_match; + mb->last_used_ptr = start_match; + mb->match_call_count = 0; + mb->match_function_type = 0; + mb->end_offset_top = 0; + mb->skip_arg_count = 0; + rc = match(start_match, mb->start_code, start_match, 2, mb, NULL, 0); + + if (mb->hitend && start_partial == NULL) + { + start_partial = mb->start_used_ptr; + match_partial = start_match; + } + + switch(rc) + { + /* If MATCH_SKIP_ARG reaches this level it means that a MARK that matched + the SKIP's arg was not found. In this circumstance, Perl ignores the SKIP + entirely. The only way we can do that is to re-do the match at the same + point, with a flag to force SKIP with an argument to be ignored. Just + treating this case as NOMATCH does not work because it does not check other + alternatives in patterns such as A(*SKIP:A)B|AC when the subject is AC. */ + + case MATCH_SKIP_ARG: + new_start_match = start_match; + mb->ignore_skip_arg = mb->skip_arg_count; + break; + + /* SKIP passes back the next starting point explicitly, but if it is no + greater than the match we have just done, treat it as NOMATCH. */ + + case MATCH_SKIP: + if (mb->start_match_ptr > start_match) + { + new_start_match = mb->start_match_ptr; + break; + } + /* Fall through */ + + /* NOMATCH and PRUNE advance by one character. THEN at this level acts + exactly like PRUNE. Unset ignore SKIP-with-argument. */ + + case MATCH_NOMATCH: + case MATCH_PRUNE: + case MATCH_THEN: + mb->ignore_skip_arg = 0; + new_start_match = start_match + 1; +#ifdef SUPPORT_UNICODE + if (utf) + ACROSSCHAR(new_start_match < end_subject, *new_start_match, + new_start_match++); +#endif + break; + + /* COMMIT disables the bumpalong, but otherwise behaves as NOMATCH. */ + + case MATCH_COMMIT: + rc = MATCH_NOMATCH; + goto ENDLOOP; + + /* Any other return is either a match, or some kind of error. */ + + default: + goto ENDLOOP; + } + + /* Control reaches here for the various types of "no match at this point" + result. Reset the code to MATCH_NOMATCH for subsequent checking. */ + + rc = MATCH_NOMATCH; + + /* If PCRE2_FIRSTLINE is set, the match must happen before or at the first + newline in the subject (though it may continue over the newline). Therefore, + if we have just failed to match, starting at a newline, do not continue. */ + + if (firstline && IS_NEWLINE(start_match)) break; + + /* Advance to new matching position */ + + start_match = new_start_match; + + /* Break the loop if the pattern is anchored or if we have passed the end of + the subject. */ + + if (anchored || start_match > end_subject) break; + + /* If we have just passed a CR and we are now at a LF, and the pattern does + not contain any explicit matches for \r or \n, and the newline option is CRLF + or ANY or ANYCRLF, advance the match position by one more code unit. In + normal matching start_match will aways be greater than the first position at + this stage, but a failed *SKIP can cause a return at the same point, which is + why the first test exists. */ + + if (start_match > subject + start_offset && + start_match[-1] == CHAR_CR && + start_match < end_subject && + *start_match == CHAR_NL && + (re->flags & PCRE2_HASCRORLF) == 0 && + (mb->nltype == NLTYPE_ANY || + mb->nltype == NLTYPE_ANYCRLF || + mb->nllen == 2)) + start_match++; + + mb->mark = NULL; /* Reset for start of next match attempt */ + } /* End of for(;;) "bumpalong" loop */ + +/* ==========================================================================*/ + +/* When we reach here, one of the stopping conditions is true: + +(1) The match succeeded, either completely, or partially; + +(2) The pattern is anchored or the match was failed by (*COMMIT); + +(3) We are past the end of the subject or the bumpalong limit; + +(4) PCRE2_FIRSTLINE is set and we have failed to match at a newline, because + this option requests that a match occur at or before the first newline in + the subject. + +(5) Some kind of error occurred. + +*/ + +ENDLOOP: + +#ifdef HEAP_MATCH_RECURSE +release_match_heapframes(&frame_zero, mb); +#endif + +/* Release any frames that were saved from recursions. */ + +while (mb->ovecsave_chain != NULL) + { + ovecsave_frame *this = mb->ovecsave_chain; + mb->ovecsave_chain = this->next; + mb->memctl.free(this, mb->memctl.memory_data); + } + +/* Fill in fields that are always returned in the match data. */ + +match_data->code = re; +match_data->subject = subject; +match_data->mark = mb->mark; +match_data->matchedby = PCRE2_MATCHEDBY_INTERPRETER; + +/* Handle a fully successful match. */ + +if (rc == MATCH_MATCH || rc == MATCH_ACCEPT) + { + uint32_t arg_offset_max = 2 * match_data->oveccount; + + /* When the offset vector is big enough to deal with any backreferences, + captured substring offsets will already be set up. In the case where we had + to get some local memory to hold offsets for backreference processing, copy + those that we can. In this case there need not be overflow if certain parts + of the pattern were not used, even though there are more capturing + parentheses than vector slots. */ + + if (using_temporary_offsets) + { + if (arg_offset_max >= 4) + { + memcpy(match_data->ovector + 2, mb->ovector + 2, + (arg_offset_max - 2) * sizeof(PCRE2_SIZE)); + } + if (mb->end_offset_top > arg_offset_max) mb->capture_last |= OVFLBIT; + mb->memctl.free(mb->ovector, mb->memctl.memory_data); + } + + /* Set the return code to the number of captured strings, or 0 if there were + too many to fit into the ovector. */ + + match_data->rc = ((mb->capture_last & OVFLBIT) != 0)? + 0 : mb->end_offset_top/2; + + /* If there is space in the offset vector, set any pairs that follow the + highest-numbered captured string but are less than the number of capturing + groups in the pattern (and are within the ovector) to PCRE2_UNSET. It is + documented that this happens. In earlier versions, the whole set of potential + capturing offsets was initialized each time round the loop, but this is + handled differently now. "Gaps" are set to PCRE2_UNSET dynamically instead + (this fixed a bug). Thus, it is only those at the end that need setting here. + We can't just mark them all unset at the start of the whole thing because + they may get set in one branch that is not the final matching branch. */ + + if (mb->end_offset_top/2 <= re->top_bracket) + { + register PCRE2_SIZE *iptr, *iend; + int resetcount = re->top_bracket + 1; + if (resetcount > match_data->oveccount) resetcount = match_data->oveccount; + iptr = match_data->ovector + mb->end_offset_top; + iend = match_data->ovector + 2 * resetcount; + while (iptr < iend) *iptr++ = PCRE2_UNSET; + } + + /* If there is space, set up the whole thing as substring 0. The value of + mb->start_match_ptr might be modified if \K was encountered on the success + matching path. */ + + if (match_data->oveccount < 1) rc = 0; else + { + match_data->ovector[0] = mb->start_match_ptr - mb->start_subject; + match_data->ovector[1] = mb->end_match_ptr - mb->start_subject; + } + + /* Set the remaining returned values */ + + match_data->startchar = start_match - subject; + match_data->leftchar = mb->start_used_ptr - subject; + match_data->rightchar = ((mb->last_used_ptr > mb->end_match_ptr)? + mb->last_used_ptr : mb->end_match_ptr) - subject; + return match_data->rc; + } + +/* Control gets here if there has been a partial match, an error, or if the +overall match attempt has failed at all permitted starting positions. Any mark +data is in the nomatch_mark field. */ + +match_data->mark = mb->nomatch_mark; + +/* For anything other than nomatch or partial match, just return the code. */ + +if (rc != MATCH_NOMATCH && rc != PCRE2_ERROR_PARTIAL) + match_data->rc = rc; + +/* Else handle a partial match. */ + +else if (match_partial != NULL) + { + if (match_data->oveccount > 0) + { + match_data->ovector[0] = match_partial - subject; + match_data->ovector[1] = end_subject - subject; + } + match_data->startchar = match_partial - subject; + match_data->leftchar = start_partial - subject; + match_data->rightchar = end_subject - subject; + match_data->rc = PCRE2_ERROR_PARTIAL; + } + +/* Else this is the classic nomatch case. */ + +else match_data->rc = PCRE2_ERROR_NOMATCH; + +/* Free any temporary offsets. */ + +if (using_temporary_offsets) + mb->memctl.free(mb->ovector, mb->memctl.memory_data); +return match_data->rc; +} + +/* End of pcre2_match.c */ |