/************************************************* * Perl-Compatible Regular Expressions * *************************************************/ /* PCRE is a library of functions to support regular expressions whose syntax and semantics are as close as possible to those of the Perl 5 language. Written by Philip Hazel Copyright (c) 1997-2013 University of Cambridge ----------------------------------------------------------------------------- Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of the University of Cambridge nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ----------------------------------------------------------------------------- */ /* This module contains pcre_exec(), the externally visible function that does pattern matching using an NFA algorithm, trying to mimic Perl as closely as possible. There are also some static supporting functions. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #define NLBLOCK md /* Block containing newline information */ #define PSSTART start_subject /* Field containing processed string start */ #define PSEND end_subject /* Field containing processed string end */ #include "pcre_internal.h" /* Undefine some potentially clashing cpp symbols */ #undef min #undef max /* The md->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 */ /* Values for setting in md->match_function_type to indicate two special types of call to match(). We do it this way to save on using another stack variable, as stack usage is to be discouraged. */ #define MATCH_CONDASSERT 1 /* Called to check a condition assertion */ #define MATCH_CBEGROUP 2 /* Could-be-empty unlimited repeat group */ /* Non-error returns from the match() function. Error returns are externally defined PCRE_ERROR_xxx codes, which are all negative. */ #define MATCH_MATCH 1 #define MATCH_NOMATCH 0 /* Special internal returns from the match() function. Make them sufficiently negative to avoid the external error codes. */ #define MATCH_ACCEPT (-999) #define MATCH_COMMIT (-998) #define MATCH_KETRPOS (-997) #define MATCH_ONCE (-996) #define MATCH_PRUNE (-995) #define MATCH_SKIP (-994) #define MATCH_SKIP_ARG (-993) #define MATCH_THEN (-992) /* Maximum number of ints of offset to save on the stack for recursive calls. If the offset vector is bigger, malloc is used. This should be a multiple of 3, because the offset vector is always a multiple of 3 long. */ #define REC_STACK_SAVE_MAX 30 /* Min and max values for the common repeats; for the maxima, 0 => infinity */ static const char rep_min[] = { 0, 0, 1, 1, 0, 0 }; static const char rep_max[] = { 0, 0, 0, 0, 1, 1 }; #ifdef PCRE_DEBUG /************************************************* * Debugging function to print chars * *************************************************/ /* Print a sequence of chars in printable format, stopping at the end of the subject if the requested. Arguments: p points to characters length number to print is_subject TRUE if printing from within md->start_subject md pointer to matching data block, if is_subject is TRUE Returns: nothing */ static void pchars(const pcre_uchar *p, int length, BOOL is_subject, match_data *md) { pcre_uint32 c; BOOL utf = md->utf; if (is_subject && length > md->end_subject - p) length = md->end_subject - p; while (length-- > 0) if (isprint(c = RAWUCHARINCTEST(p))) printf("%c", (char)c); else printf("\\x{%02x}", c); } #endif /************************************************* * Match a back-reference * *************************************************/ /* Normally, if a back reference hasn't been set, the length that is passed is negative, so the match always fails. However, in JavaScript compatibility mode, the length passed is zero. Note that in caseless UTF-8 mode, the number of subject bytes matched may be different to the number of reference bytes. Arguments: offset index into the offset vector eptr pointer into the subject length length of reference to be matched (number of bytes) md points to match data block caseless TRUE if caseless Returns: >= 0 the number of subject bytes matched -1 no match -2 partial match; always given if at end subject */ static int match_ref(int offset, register PCRE_PUCHAR eptr, int length, match_data *md, BOOL caseless) { PCRE_PUCHAR eptr_start = eptr; register PCRE_PUCHAR p = md->start_subject + md->offset_vector[offset]; #ifdef SUPPORT_UTF BOOL utf = md->utf; #endif #ifdef PCRE_DEBUG if (eptr >= md->end_subject) printf("matching subject "); else { printf("matching subject "); pchars(eptr, length, TRUE, md); } printf(" against backref "); pchars(p, length, FALSE, md); printf("\n"); #endif /* Always fail if reference not set (and not JavaScript compatible - in that case the length is passed as zero). */ if (length < 0) return -1; /* Separate the caseless case for speed. In UTF-8 mode we can only do this properly if Unicode properties are supported. Otherwise, we can check only ASCII characters. */ if (caseless) { #ifdef SUPPORT_UTF #ifdef SUPPORT_UCP if (utf) { /* Match characters up to the end of the reference. NOTE: the number of data 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). */ PCRE_PUCHAR endptr = p + length; while (p < endptr) { pcre_uint32 c, d; const ucd_record *ur; if (eptr >= md->end_subject) return -2; /* Partial match */ GETCHARINC(c, eptr); GETCHARINC(d, p); ur = GET_UCD(d); if (c != d && c != d + ur->other_case) { const pcre_uint32 *pp = PRIV(ucd_caseless_sets) + ur->caseset; for (;;) { if (c < *pp) return -1; if (c == *pp++) break; } } } } else #endif #endif /* The same code works when not in UTF-8 mode and in UTF-8 mode when there is no UCP support. */ { while (length-- > 0) { pcre_uint32 cc, cp; if (eptr >= md->end_subject) return -2; /* Partial match */ cc = RAWUCHARTEST(eptr); cp = RAWUCHARTEST(p); if (TABLE_GET(cp, md->lcc, cp) != TABLE_GET(cc, md->lcc, cc)) return -1; p++; eptr++; } } } /* In the caseful case, we can just compare the bytes, whether or not we are in UTF-8 mode. */ else { while (length-- > 0) { if (eptr >= md->end_subject) return -2; /* Partial match */ if (RAWUCHARINCTEST(p) != RAWUCHARINCTEST(eptr)) return -1; } } return (int)(eptr - eptr_start); } /*************************************************************************** **************************************************************************** RECURSION IN THE match() FUNCTION The match() function is highly recursive, though not every recursive call increases the recursive depth. Nevertheless, some regular expressions can cause it to recurse to a great depth. I was writing for Unix, so I just let it call itself recursively. This uses the stack for saving everything that has to be saved for a recursive call. On Unix, the stack can be large, and this works fine. It turns out that on some non-Unix-like systems there are problems with programs that use a lot of stack. (This despite the fact that every last chip has oodles of memory these days, and techniques for extending the stack have been known for decades.) So.... There is a fudge, triggered by defining NO_RECURSE, which avoids recursive calls by keeping local variables that need to be preserved in blocks of memory obtained from malloc() instead instead of on the stack. Macros are used to achieve this so that the actual code doesn't look very different to what it always used to. The original heap-recursive code used longjmp(). However, it seems that this can be very slow on some operating systems. Following a suggestion from Stan Switzer, the use of longjmp() has been abolished, at the cost of having to provide a unique number for each call to RMATCH. There is no way of generating a sequence of numbers at compile time in C. I have given them names, to make them stand out more clearly. Crude tests on x86 Linux show a small speedup of around 5-8%. However, on FreeBSD, avoiding longjmp() more than halves the time taken to run the standard tests. Furthermore, not using longjmp() means that local dynamic variables don't have indeterminate values; this has meant that the frame size can be reduced because the result can be "passed back" by straight setting of the variable instead of being passed in the frame. **************************************************************************** ***************************************************************************/ /* Numbers for RMATCH calls. When this list is changed, the code at HEAP_RETURN below must be updated in sync. */ enum { RM1=1, RM2, RM3, RM4, RM5, RM6, RM7, RM8, RM9, RM10, RM11, RM12, RM13, RM14, RM15, RM16, RM17, RM18, RM19, RM20, RM21, RM22, RM23, RM24, RM25, RM26, RM27, RM28, RM29, RM30, RM31, RM32, RM33, RM34, RM35, RM36, RM37, RM38, RM39, RM40, RM41, RM42, RM43, RM44, RM45, RM46, RM47, RM48, RM49, RM50, RM51, RM52, RM53, RM54, RM55, RM56, RM57, RM58, RM59, RM60, RM61, RM62, RM63, RM64, RM65, RM66, RM67, RM68 }; /* These versions of the macros use the stack, as normal. There are debugging versions and production versions. Note that the "rw" argument of RMATCH isn't actually used in this definition. */ #ifndef NO_RECURSE #define REGISTER register #ifdef PCRE_DEBUG #define RMATCH(ra,rb,rc,rd,re,rw) \ { \ printf("match() called in line %d\n", __LINE__); \ rrc = match(ra,rb,mstart,rc,rd,re,rdepth+1); \ printf("to line %d\n", __LINE__); \ } #define RRETURN(ra) \ { \ printf("match() returned %d from line %d\n", ra, __LINE__); \ return ra; \ } #else #define RMATCH(ra,rb,rc,rd,re,rw) \ rrc = match(ra,rb,mstart,rc,rd,re,rdepth+1) #define RRETURN(ra) return ra #endif #else /* These versions of the macros manage a private stack on the heap. Note that the "rd" argument of RMATCH isn't actually used in this definition. It's the md argument of match(), which never changes. */ #define REGISTER #define RMATCH(ra,rb,rc,rd,re,rw)\ {\ heapframe *newframe = frame->Xnextframe;\ if (newframe == NULL)\ {\ newframe = (heapframe *)(PUBL(stack_malloc))(sizeof(heapframe));\ if (newframe == NULL) RRETURN(PCRE_ERROR_NOMEMORY);\ newframe->Xnextframe = NULL;\ frame->Xnextframe = newframe;\ }\ frame->Xwhere = rw;\ newframe->Xeptr = ra;\ newframe->Xecode = rb;\ newframe->Xmstart = mstart;\ newframe->Xoffset_top = rc;\ newframe->Xeptrb = re;\ newframe->Xrdepth = frame->Xrdepth + 1;\ newframe->Xprevframe = frame;\ frame = newframe;\ DPRINTF(("restarting from line %d\n", __LINE__));\ goto HEAP_RECURSE;\ L_##rw:\ DPRINTF(("jumped back to line %d\n", __LINE__));\ } #define RRETURN(ra)\ {\ heapframe *oldframe = frame;\ frame = oldframe->Xprevframe;\ if (frame != NULL)\ {\ rrc = ra;\ goto HEAP_RETURN;\ }\ return ra;\ } /* Structure for remembering the local variables in a private frame */ typedef struct heapframe { struct heapframe *Xprevframe; struct heapframe *Xnextframe; /* Function arguments that may change */ PCRE_PUCHAR Xeptr; const pcre_uchar *Xecode; PCRE_PUCHAR Xmstart; int Xoffset_top; eptrblock *Xeptrb; unsigned int Xrdepth; /* Function local variables */ PCRE_PUCHAR Xcallpat; #ifdef SUPPORT_UTF PCRE_PUCHAR Xcharptr; #endif PCRE_PUCHAR Xdata; PCRE_PUCHAR Xnext; PCRE_PUCHAR Xpp; PCRE_PUCHAR Xprev; PCRE_PUCHAR Xsaved_eptr; recursion_info Xnew_recursive; BOOL Xcur_is_word; BOOL Xcondition; BOOL Xprev_is_word; #ifdef SUPPORT_UCP int Xprop_type; unsigned int Xprop_value; int Xprop_fail_result; int Xoclength; pcre_uchar Xocchars[6]; #endif int Xcodelink; int Xctype; unsigned int Xfc; int Xfi; int Xlength; int Xmax; int Xmin; unsigned int Xnumber; int Xoffset; unsigned int Xop; pcre_int32 Xsave_capture_last; int Xsave_offset1, Xsave_offset2, Xsave_offset3; int Xstacksave[REC_STACK_SAVE_MAX]; eptrblock Xnewptrb; /* Where to jump back to */ int Xwhere; } heapframe; #endif /*************************************************************************** ***************************************************************************/ /************************************************* * Match from current position * *************************************************/ /* This function is called recursively in many circumstances. Whenever it returns a negative (error) response, the outer incarnation must also return the same response. */ /* These macros pack up tests that are used for partial matching, and which appear several times in the code. We set the "hit end" flag if the pointer is at the end of the subject and also past the start of the subject (i.e. something has been matched). For hard partial matching, we then return immediately. The second one is used when we already know we are past the end of the subject. */ #define CHECK_PARTIAL()\ if (md->partial != 0 && eptr >= md->end_subject && \ eptr > md->start_used_ptr) \ { \ md->hitend = TRUE; \ if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL); \ } #define SCHECK_PARTIAL()\ if (md->partial != 0 && eptr > md->start_used_ptr) \ { \ md->hitend = TRUE; \ if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL); \ } /* Performance note: It might be tempting to extract commonly used fields from the md structure (e.g. utf, end_subject) into individual variables to improve performance. Tests using gcc on a SPARC disproved this; in the first case, it made performance worse. Arguments: eptr pointer to current character in subject ecode pointer to current position in compiled code mstart pointer to the current match start position (can be modified by encountering \K) offset_top current top pointer md pointer to "static" info for the match eptrb pointer to chain of blocks containing eptr at start of brackets - for testing for empty matches rdepth the recursion depth Returns: MATCH_MATCH if matched ) these values are >= 0 MATCH_NOMATCH if failed to match ) a negative MATCH_xxx value for PRUNE, SKIP, etc a negative PCRE_ERROR_xxx value if aborted by an error condition (e.g. stopped by repeated call or recursion limit) */ static int match(REGISTER PCRE_PUCHAR eptr, REGISTER const pcre_uchar *ecode, PCRE_PUCHAR mstart, int offset_top, match_data *md, eptrblock *eptrb, unsigned int rdepth) { /* These variables do not need to be preserved over recursion in this function, so they can be ordinary variables in all cases. Mark some of them with "register" because they are used a lot in loops. */ register int rrc; /* Returns from recursive calls */ register int i; /* Used for loops not involving calls to RMATCH() */ register pcre_uint32 c; /* Character values not kept over RMATCH() calls */ register BOOL utf; /* Local copy of UTF flag for speed */ BOOL minimize, possessive; /* Quantifier options */ BOOL caseless; int condcode; /* When recursion is not being used, all "local" variables that have to be preserved over calls to RMATCH() are part of a "frame". We set up the top-level frame on the stack here; subsequent instantiations are obtained from the heap whenever RMATCH() does a "recursion". See the macro definitions above. Putting the top-level on the stack rather than malloc-ing them all gives a performance boost in many cases where there is not much "recursion". */ #ifdef NO_RECURSE heapframe *frame = (heapframe *)md->match_frames_base; /* Copy in the original argument variables */ frame->Xeptr = eptr; frame->Xecode = ecode; frame->Xmstart = mstart; frame->Xoffset_top = offset_top; frame->Xeptrb = eptrb; frame->Xrdepth = rdepth; /* This is where control jumps back to to effect "recursion" */ HEAP_RECURSE: /* Macros make the argument variables come from the current frame */ #define eptr frame->Xeptr #define ecode frame->Xecode #define mstart frame->Xmstart #define offset_top frame->Xoffset_top #define eptrb frame->Xeptrb #define rdepth frame->Xrdepth /* Ditto for the local variables */ #ifdef SUPPORT_UTF #define charptr frame->Xcharptr #endif #define callpat frame->Xcallpat #define codelink frame->Xcodelink #define data frame->Xdata #define next frame->Xnext #define pp frame->Xpp #define prev frame->Xprev #define saved_eptr frame->Xsaved_eptr #define new_recursive frame->Xnew_recursive #define cur_is_word frame->Xcur_is_word #define condition frame->Xcondition #define prev_is_word frame->Xprev_is_word #ifdef SUPPORT_UCP #define prop_type frame->Xprop_type #define prop_value frame->Xprop_value #define prop_fail_result frame->Xprop_fail_result #define oclength frame->Xoclength #define occhars frame->Xocchars #endif #define ctype frame->Xctype #define fc frame->Xfc #define fi frame->Xfi #define length frame->Xlength #define max frame->Xmax #define min frame->Xmin #define number frame->Xnumber #define offset frame->Xoffset #define op frame->Xop #define save_capture_last frame->Xsave_capture_last #define save_offset1 frame->Xsave_offset1 #define save_offset2 frame->Xsave_offset2 #define save_offset3 frame->Xsave_offset3 #define stacksave frame->Xstacksave #define newptrb frame->Xnewptrb /* When recursion is being used, local variables are allocated on the stack and get preserved during recursion in the normal way. In this environment, fi and i, and fc and c, can be the same variables. */ #else /* NO_RECURSE not defined */ #define fi i #define fc c /* Many of the following variables are used only in small blocks of the code. My normal style of coding would have declared them within each of those blocks. However, in order to accommodate the version of this code that uses an external "stack" implemented on the heap, it is easier to declare them all here, so the declarations can be cut out in a block. The only declarations within blocks below are for variables that do not have to be preserved over a recursive call to RMATCH(). */ #ifdef SUPPORT_UTF const pcre_uchar *charptr; #endif const pcre_uchar *callpat; const pcre_uchar *data; const pcre_uchar *next; PCRE_PUCHAR pp; const pcre_uchar *prev; PCRE_PUCHAR saved_eptr; recursion_info new_recursive; BOOL cur_is_word; BOOL condition; BOOL prev_is_word; #ifdef SUPPORT_UCP int prop_type; unsigned int prop_value; int prop_fail_result; int oclength; pcre_uchar occhars[6]; #endif int codelink; int ctype; int length; int max; int min; unsigned int number; int offset; unsigned int op; pcre_int32 save_capture_last; int save_offset1, save_offset2, save_offset3; int stacksave[REC_STACK_SAVE_MAX]; eptrblock newptrb; /* There is a special fudge for calling match() in a way that causes it to measure the size of its basic stack frame when the stack is being used for recursion. The second argument (ecode) being NULL triggers this behaviour. It cannot normally ever be NULL. The return is the negated value of the frame size. */ if (ecode == NULL) { if (rdepth == 0) return match((PCRE_PUCHAR)&rdepth, NULL, NULL, 0, NULL, NULL, 1); else { int len = (char *)&rdepth - (char *)eptr; return (len > 0)? -len : len; } } #endif /* NO_RECURSE */ /* To save space on the stack and in the heap frame, I have doubled up on some of the local variables that are used only in localised parts of the code, but still need to be preserved over recursive calls of match(). These macros define the alternative names that are used. */ #define allow_zero cur_is_word #define cbegroup condition #define code_offset codelink #define condassert condition #define matched_once prev_is_word #define foc number #define save_mark data /* These statements are here to stop the compiler complaining about unitialized variables. */ #ifdef SUPPORT_UCP prop_value = 0; prop_fail_result = 0; #endif /* This label is used for tail recursion, which is used in a few cases even when NO_RECURSE is not defined, in order to reduce the amount of stack that is used. Thanks to Ian Taylor for noticing this possibility and sending the original patch. */ TAIL_RECURSE: /* OK, now we can get on with the real code of the function. Recursive calls are specified by the macro RMATCH and RRETURN is used to return. When NO_RECURSE is *not* defined, these just turn into a recursive call to match() and a "return", respectively (possibly with some debugging if PCRE_DEBUG is defined). However, RMATCH isn't like a function call because it's quite a complicated macro. It has to be used in one particular way. This shouldn't, however, impact performance when true recursion is being used. */ #ifdef SUPPORT_UTF utf = md->utf; /* Local copy of the flag */ #else utf = FALSE; #endif /* First check that we haven't called match() too many times, or that we haven't exceeded the recursive call limit. */ if (md->match_call_count++ >= md->match_limit) RRETURN(PCRE_ERROR_MATCHLIMIT); if (rdepth >= md->match_limit_recursion) RRETURN(PCRE_ERROR_RECURSIONLIMIT); /* At the start of a group with an unlimited repeat that may match an empty string, the variable md->match_function_type is set to MATCH_CBEGROUP. It is done this way to save having to use another function argument, which would take up space on the stack. See also MATCH_CONDASSERT below. When MATCH_CBEGROUP is set, add the current subject pointer to the chain of such remembered pointers, to be checked when we hit the closing ket, in order to break infinite loops that match no characters. When match() is called in other circumstances, don't add to the chain. The MATCH_CBEGROUP feature must NOT be used with tail recursion, because the memory block that is used is on the stack, so a new one may be required for each match(). */ if (md->match_function_type == MATCH_CBEGROUP) { newptrb.epb_saved_eptr = eptr; newptrb.epb_prev = eptrb; eptrb = &newptrb; md->match_function_type = 0; } /* Now start processing the opcodes. */ for (;;) { minimize = possessive = FALSE; op = *ecode; switch(op) { case OP_MARK: md->nomatch_mark = ecode + 2; md->mark = NULL; /* In case previously set by assertion */ RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode] + ecode[1], offset_top, md, eptrb, RM55); if ((rrc == MATCH_MATCH || rrc == MATCH_ACCEPT) && md->mark == NULL) md->mark = ecode + 2; /* A return of MATCH_SKIP_ARG means that matching failed at SKIP with an argument, and we must check whether that argument matches this MARK's argument. It is passed back in md->start_match_ptr (an overloading of that variable). If it does match, we reset that variable to the current subject position and return MATCH_SKIP. Otherwise, pass back the return code unaltered. */ else if (rrc == MATCH_SKIP_ARG && STRCMP_UC_UC_TEST(ecode + 2, md->start_match_ptr) == 0) { md->start_match_ptr = eptr; RRETURN(MATCH_SKIP); } RRETURN(rrc); case OP_FAIL: RRETURN(MATCH_NOMATCH); /* COMMIT overrides PRUNE, SKIP, and THEN */ case OP_COMMIT: RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, md, eptrb, RM52); if (rrc != MATCH_NOMATCH && rrc != MATCH_PRUNE && rrc != MATCH_SKIP && rrc != MATCH_SKIP_ARG && rrc != MATCH_THEN) RRETURN(rrc); RRETURN(MATCH_COMMIT); /* PRUNE overrides THEN */ case OP_PRUNE: RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, md, eptrb, RM51); if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) RRETURN(rrc); RRETURN(MATCH_PRUNE); case OP_PRUNE_ARG: md->nomatch_mark = ecode + 2; md->mark = NULL; /* In case previously set by assertion */ RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode] + ecode[1], offset_top, md, eptrb, RM56); if ((rrc == MATCH_MATCH || rrc == MATCH_ACCEPT) && md->mark == NULL) md->mark = ecode + 2; if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) RRETURN(rrc); RRETURN(MATCH_PRUNE); /* SKIP overrides PRUNE and THEN */ case OP_SKIP: RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, md, eptrb, RM53); if (rrc != MATCH_NOMATCH && rrc != MATCH_PRUNE && rrc != MATCH_THEN) RRETURN(rrc); md->start_match_ptr = eptr; /* Pass back current position */ RRETURN(MATCH_SKIP); /* Note that, for Perl compatibility, SKIP with an argument does NOT set nomatch_mark. There is a flag that disables this opcode when re-matching a pattern that ended with a SKIP for which there was not a matching MARK. */ case OP_SKIP_ARG: if (md->ignore_skip_arg) { ecode += PRIV(OP_lengths)[*ecode] + ecode[1]; break; } RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode] + ecode[1], offset_top, md, eptrb, RM57); if (rrc != MATCH_NOMATCH && rrc != MATCH_PRUNE && rrc != MATCH_THEN) RRETURN(rrc); /* Pass back the current skip name by overloading md->start_match_ptr and returning the special MATCH_SKIP_ARG return code. This will either be caught by a matching MARK, or get to the top, where it causes a rematch with the md->ignore_skip_arg flag set. */ md->start_match_ptr = ecode + 2; RRETURN(MATCH_SKIP_ARG); /* For THEN (and THEN_ARG) we pass back the address of the opcode, so that the branch in which it occurs can be determined. Overload the start of match pointer to do this. */ case OP_THEN: RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, md, eptrb, RM54); if (rrc != MATCH_NOMATCH) RRETURN(rrc); md->start_match_ptr = ecode; RRETURN(MATCH_THEN); case OP_THEN_ARG: md->nomatch_mark = ecode + 2; md->mark = NULL; /* In case previously set by assertion */ RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode] + ecode[1], offset_top, md, eptrb, RM58); if ((rrc == MATCH_MATCH || rrc == MATCH_ACCEPT) && md->mark == NULL) md->mark = ecode + 2; if (rrc != MATCH_NOMATCH) RRETURN(rrc); md->start_match_ptr = ecode; RRETURN(MATCH_THEN); /* Handle an atomic group that does not contain any capturing parentheses. This can be handled like an assertion. Prior to 8.13, all atomic groups were handled this way. In 8.13, the code was changed as below for ONCE, so that backups pass through the group and thereby reset captured values. However, this uses a lot more stack, so in 8.20, atomic groups that do not contain any captures generate OP_ONCE_NC, which can be handled in the old, less stack intensive way. Check the alternative branches in turn - the matching won't pass the KET for this kind of subpattern. If any one branch matches, we carry on as at the end of a normal bracket, leaving the subject pointer, but resetting the start-of-match value in case it was changed by \K. */ case OP_ONCE_NC: prev = ecode; saved_eptr = eptr; save_mark = md->mark; do { RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, eptrb, RM64); if (rrc == MATCH_MATCH) /* Note: _not_ MATCH_ACCEPT */ { mstart = md->start_match_ptr; break; } if (rrc == MATCH_THEN) { next = ecode + GET(ecode,1); if (md->start_match_ptr < next && (*ecode == OP_ALT || *next == OP_ALT)) rrc = MATCH_NOMATCH; } if (rrc != MATCH_NOMATCH) RRETURN(rrc); ecode += GET(ecode,1); md->mark = save_mark; } while (*ecode == OP_ALT); /* If hit the end of the group (which could be repeated), fail */ if (*ecode != OP_ONCE_NC && *ecode != OP_ALT) RRETURN(MATCH_NOMATCH); /* Continue as from after the group, updating the offsets high water mark, since extracts may have been taken. */ do ecode += GET(ecode, 1); while (*ecode == OP_ALT); offset_top = md->end_offset_top; eptr = md->end_match_ptr; /* For a non-repeating ket, just continue at this level. This also happens for a repeating ket if no characters were matched in the group. This is the forcible breaking of infinite loops as implemented in Perl 5.005. */ if (*ecode == OP_KET || eptr == saved_eptr) { ecode += 1+LINK_SIZE; break; } /* The repeating kets try the rest of the pattern or restart from the preceding bracket, in the appropriate order. The second "call" of match() uses tail recursion, to avoid using another stack frame. */ if (*ecode == OP_KETRMIN) { RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, eptrb, RM65); if (rrc != MATCH_NOMATCH) RRETURN(rrc); ecode = prev; goto TAIL_RECURSE; } else /* OP_KETRMAX */ { RMATCH(eptr, prev, offset_top, md, eptrb, RM66); if (rrc != MATCH_NOMATCH) RRETURN(rrc); ecode += 1 + LINK_SIZE; goto TAIL_RECURSE; } /* Control never gets here */ /* Handle a capturing bracket, other than those that are possessive with an unlimited repeat. If there is space in the offset vector, save the current subject position in the working slot at the top of the vector. We mustn't change the current values of the data slot, because they may be set from a previous iteration of this group, and be referred to by a reference inside the group. A failure to match might occur after the group has succeeded, if something later on doesn't match. For this reason, we need to restore the working value and also the values of the final offsets, in case they were set by a previous iteration of the same bracket. If there isn't enough space in the offset vector, treat this as if it were a non-capturing bracket. Don't worry about setting the flag for the error case here; that is handled in the code for KET. */ case OP_CBRA: case OP_SCBRA: number = GET2(ecode, 1+LINK_SIZE); offset = number << 1; #ifdef PCRE_DEBUG printf("start bracket %d\n", number); printf("subject="); pchars(eptr, 16, TRUE, md); printf("\n"); #endif if (offset < md->offset_max) { save_offset1 = md->offset_vector[offset]; save_offset2 = md->offset_vector[offset+1]; save_offset3 = md->offset_vector[md->offset_end - number]; save_capture_last = md->capture_last; save_mark = md->mark; DPRINTF(("saving %d %d %d\n", save_offset1, save_offset2, save_offset3)); md->offset_vector[md->offset_end - number] = (int)(eptr - md->start_subject); for (;;) { if (op >= OP_SBRA) md->match_function_type = MATCH_CBEGROUP; RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, md, eptrb, RM1); if (rrc == MATCH_ONCE) break; /* Backing up through an atomic group */ /* If we backed up to a THEN, check whether it is within the current branch by comparing the address of the THEN that is passed back with the end of the branch. If it is within the current branch, and the branch is one of two or more alternatives (it either starts or ends with OP_ALT), we have reached the limit of THEN's action, so convert the return code to NOMATCH, which will cause normal backtracking to happen from now on. Otherwise, THEN is passed back to an outer alternative. This implements Perl's treatment of parenthesized groups, where a group not containing | does not affect the current alternative, that is, (X) is NOT the same as (X|(*F)). */ if (rrc == MATCH_THEN) { next = ecode + GET(ecode,1); if (md->start_match_ptr < next && (*ecode == OP_ALT || *next == OP_ALT)) rrc = MATCH_NOMATCH; } /* Anything other than NOMATCH is passed back. */ if (rrc != MATCH_NOMATCH) RRETURN(rrc); md->capture_last = save_capture_last; ecode += GET(ecode, 1); md->mark = save_mark; if (*ecode != OP_ALT) break; } DPRINTF(("bracket %d failed\n", number)); md->offset_vector[offset] = save_offset1; md->offset_vector[offset+1] = save_offset2; md->offset_vector[md->offset_end - number] = save_offset3; /* At this point, rrc will be one of MATCH_ONCE or MATCH_NOMATCH. */ RRETURN(rrc); } /* FALL THROUGH ... Insufficient room for saving captured contents. Treat as a non-capturing bracket. */ /* VVVVVVVVVVVVVVVVVVVVVVVVV */ /* VVVVVVVVVVVVVVVVVVVVVVVVV */ DPRINTF(("insufficient capture room: treat as non-capturing\n")); /* VVVVVVVVVVVVVVVVVVVVVVVVV */ /* VVVVVVVVVVVVVVVVVVVVVVVVV */ /* Non-capturing or atomic group, except for possessive with unlimited repeat and ONCE group with no captures. Loop for all the alternatives. When we get to the final alternative within the brackets, we used to return the result of a recursive call to match() whatever happened so it was possible to reduce stack usage by turning this into a tail recursion, except in the case of a possibly empty group. However, now that there is the possiblity of (*THEN) occurring in the final alternative, this optimization is no longer always possible. We can optimize if we know there are no (*THEN)s in the pattern; at present this is the best that can be done. MATCH_ONCE is returned when the end of an atomic group is successfully reached, but subsequent matching fails. It passes back up the tree (causing captured values to be reset) until the original atomic group level is reached. This is tested by comparing md->once_target with the start of the group. At this point, the return is converted into MATCH_NOMATCH so that previous backup points can be taken. */ case OP_ONCE: case OP_BRA: case OP_SBRA: DPRINTF(("start non-capturing bracket\n")); for (;;) { if (op >= OP_SBRA || op == OP_ONCE) md->match_function_type = MATCH_CBEGROUP; /* If this is not a possibly empty group, and there are no (*THEN)s in the pattern, and this is the final alternative, optimize as described above. */ else if (!md->hasthen && ecode[GET(ecode, 1)] != OP_ALT) { ecode += PRIV(OP_lengths)[*ecode]; goto TAIL_RECURSE; } /* In all other cases, we have to make another call to match(). */ save_mark = md->mark; save_capture_last = md->capture_last; RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, md, eptrb, RM2); /* See comment in the code for capturing groups above about handling THEN. */ if (rrc == MATCH_THEN) { next = ecode + GET(ecode,1); if (md->start_match_ptr < next && (*ecode == OP_ALT || *next == OP_ALT)) rrc = MATCH_NOMATCH; } if (rrc != MATCH_NOMATCH) { if (rrc == MATCH_ONCE) { const pcre_uchar *scode = ecode; if (*scode != OP_ONCE) /* If not at start, find it */ { while (*scode == OP_ALT) scode += GET(scode, 1); scode -= GET(scode, 1); } if (md->once_target == scode) rrc = MATCH_NOMATCH; } RRETURN(rrc); } ecode += GET(ecode, 1); md->mark = save_mark; if (*ecode != OP_ALT) break; md->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 offset_vector values are handled similarly to the normal case above. However, the matching is different. The end of these brackets will always be OP_KETRPOS, which returns MATCH_KETRPOS without going further in the pattern. By this means we can handle the group by iteration rather than recursion, thereby reducing the amount of stack needed. */ case OP_CBRAPOS: case OP_SCBRAPOS: allow_zero = FALSE; POSSESSIVE_CAPTURE: number = GET2(ecode, 1+LINK_SIZE); offset = number << 1; #ifdef PCRE_DEBUG printf("start possessive bracket %d\n", number); printf("subject="); pchars(eptr, 16, TRUE, md); printf("\n"); #endif if (offset < md->offset_max) { matched_once = FALSE; code_offset = (int)(ecode - md->start_code); save_offset1 = md->offset_vector[offset]; save_offset2 = md->offset_vector[offset+1]; save_offset3 = md->offset_vector[md->offset_end - number]; save_capture_last = md->capture_last; DPRINTF(("saving %d %d %d\n", save_offset1, save_offset2, save_offset3)); /* Each time round the loop, save the current subject position for use when the group matches. For MATCH_MATCH, the group has matched, so we restart it with a new subject starting position, remembering that we had at least one match. For MATCH_NOMATCH, carry on with the alternatives, as usual. If we haven't matched any alternatives in any iteration, check to see if a previous iteration matched. If so, the group has matched; continue from afterwards. Otherwise it has failed; restore the previous capture values before returning NOMATCH. */ for (;;) { md->offset_vector[md->offset_end - number] = (int)(eptr - md->start_subject); if (op >= OP_SBRA) md->match_function_type = MATCH_CBEGROUP; RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, md, eptrb, RM63); if (rrc == MATCH_KETRPOS) { offset_top = md->end_offset_top; eptr = md->end_match_ptr; ecode = md->start_code + code_offset; save_capture_last = md->capture_last; matched_once = TRUE; continue; } /* See comment in the code for capturing groups above about handling THEN. */ if (rrc == MATCH_THEN) { next = ecode + GET(ecode,1); if (md->start_match_ptr < next && (*ecode == OP_ALT || *next == OP_ALT)) rrc = MATCH_NOMATCH; } if (rrc != MATCH_NOMATCH) RRETURN(rrc); md->capture_last = save_capture_last; ecode += GET(ecode, 1); if (*ecode != OP_ALT) break; } if (!matched_once) { md->offset_vector[offset] = save_offset1; md->offset_vector[offset+1] = save_offset2; md->offset_vector[md->offset_end - number] = save_offset3; } if (allow_zero || matched_once) { ecode += 1 + LINK_SIZE; break; } RRETURN(MATCH_NOMATCH); } /* FALL THROUGH ... Insufficient room for saving captured contents. Treat as a non-capturing bracket. */ /* VVVVVVVVVVVVVVVVVVVVVVVVV */ /* VVVVVVVVVVVVVVVVVVVVVVVVV */ DPRINTF(("insufficient capture room: treat as non-capturing\n")); /* VVVVVVVVVVVVVVVVVVVVVVVVV */ /* VVVVVVVVVVVVVVVVVVVVVVVVV */ /* Non-capturing possessive bracket with unlimited repeat. We come here from BRAZERO with allow_zero = TRUE. The code is similar to the above, without the capturing complication. It is written out separately for speed and cleanliness. */ case OP_BRAPOS: case OP_SBRAPOS: allow_zero = FALSE; POSSESSIVE_NON_CAPTURE: matched_once = FALSE; code_offset = (int)(ecode - md->start_code); save_capture_last = md->capture_last; for (;;) { if (op >= OP_SBRA) md->match_function_type = MATCH_CBEGROUP; RMATCH(eptr, ecode + PRIV(OP_lengths)[*ecode], offset_top, md, eptrb, RM48); if (rrc == MATCH_KETRPOS) { offset_top = md->end_offset_top; eptr = md->end_match_ptr; ecode = md->start_code + code_offset; matched_once = TRUE; continue; } /* See comment in the code for capturing groups above about handling THEN. */ if (rrc == MATCH_THEN) { next = ecode + GET(ecode,1); if (md->start_match_ptr < next && (*ecode == OP_ALT || *next == OP_ALT)) rrc = MATCH_NOMATCH; } if (rrc != MATCH_NOMATCH) RRETURN(rrc); ecode += GET(ecode, 1); if (*ecode != OP_ALT) break; md->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 if there is only one branch, but that's OK because that is exactly what going to the ket would do. */ case OP_COND: case OP_SCOND: codelink = GET(ecode, 1); /* Because of the way auto-callout works during compile, a callout item is inserted between OP_COND and an assertion condition. */ if (ecode[LINK_SIZE+1] == OP_CALLOUT) { if (PUBL(callout) != NULL) { PUBL(callout_block) cb; cb.version = 2; /* Version 1 of the callout block */ cb.callout_number = ecode[LINK_SIZE+2]; cb.offset_vector = md->offset_vector; #if defined COMPILE_PCRE8 cb.subject = (PCRE_SPTR)md->start_subject; #elif defined COMPILE_PCRE16 cb.subject = (PCRE_SPTR16)md->start_subject; #elif defined COMPILE_PCRE32 cb.subject = (PCRE_SPTR32)md->start_subject; #endif cb.subject_length = (int)(md->end_subject - md->start_subject); cb.start_match = (int)(mstart - md->start_subject); cb.current_position = (int)(eptr - md->start_subject); cb.pattern_position = GET(ecode, LINK_SIZE + 3); cb.next_item_length = GET(ecode, 3 + 2*LINK_SIZE); cb.capture_top = offset_top/2; cb.capture_last = md->capture_last & CAPLMASK; /* Internal change requires this for API compatibility. */ if (cb.capture_last == 0) cb.capture_last = -1; cb.callout_data = md->callout_data; cb.mark = md->nomatch_mark; if ((rrc = (*PUBL(callout))(&cb)) > 0) RRETURN(MATCH_NOMATCH); if (rrc < 0) RRETURN(rrc); } ecode += PRIV(OP_lengths)[OP_CALLOUT]; codelink -= PRIV(OP_lengths)[OP_CALLOUT]; } condcode = ecode[LINK_SIZE+1]; /* Now see what the actual condition is */ if (condcode == OP_RREF || condcode == OP_NRREF) /* Recursion test */ { if (md->recursive == NULL) /* Not recursing => FALSE */ { condition = FALSE; ecode += GET(ecode, 1); } else { unsigned int recno = GET2(ecode, LINK_SIZE + 2); /* Recursion group number*/ condition = (recno == RREF_ANY || recno == md->recursive->group_num); /* If the test is for recursion into a specific subpattern, and it is false, but the test was set up by name, scan the table to see if the name refers to any other numbers, and test them. The condition is true if any one is set. */ if (!condition && condcode == OP_NRREF) { pcre_uchar *slotA = md->name_table; for (i = 0; i < md->name_count; i++) { if (GET2(slotA, 0) == recno) break; slotA += md->name_entry_size; } /* Found a name for the number - there can be only one; duplicate names for different numbers are allowed, but not vice versa. First scan down for duplicates. */ if (i < md->name_count) { pcre_uchar *slotB = slotA; while (slotB > md->name_table) { slotB -= md->name_entry_size; if (STRCMP_UC_UC(slotA + IMM2_SIZE, slotB + IMM2_SIZE) == 0) { condition = GET2(slotB, 0) == md->recursive->group_num; if (condition) break; } else break; } /* Scan up for duplicates */ if (!condition) { slotB = slotA; for (i++; i < md->name_count; i++) { slotB += md->name_entry_size; if (STRCMP_UC_UC(slotA + IMM2_SIZE, slotB + IMM2_SIZE) == 0) { condition = GET2(slotB, 0) == md->recursive->group_num; if (condition) break; } else break; } } } } /* Chose branch according to the condition */ ecode += condition? 1 + IMM2_SIZE : GET(ecode, 1); } } else if (condcode == OP_CREF || condcode == OP_NCREF) /* Group used test */ { offset = GET2(ecode, LINK_SIZE+2) << 1; /* Doubled ref number */ condition = offset < offset_top && md->offset_vector[offset] >= 0; /* If the numbered capture is unset, but the reference was by name, scan the table to see if the name refers to any other numbers, and test them. The condition is true if any one is set. This is tediously similar to the code above, but not close enough to try to amalgamate. */ if (!condition && condcode == OP_NCREF) { unsigned int refno = offset >> 1; pcre_uchar *slotA = md->name_table; for (i = 0; i < md->name_count; i++) { if (GET2(slotA, 0) == refno) break; slotA += md->name_entry_size; } /* Found a name for the number - there can be only one; duplicate names for different numbers are allowed, but not vice versa. First scan down for duplicates. */ if (i < md->name_count) { pcre_uchar *slotB = slotA; while (slotB > md->name_table) { slotB -= md->name_entry_size; if (STRCMP_UC_UC(slotA + IMM2_SIZE, slotB + IMM2_SIZE) == 0) { offset = GET2(slotB, 0) << 1; condition = offset < offset_top && md->offset_vector[offset] >= 0; if (condition) break; } else break; } /* Scan up for duplicates */ if (!condition) { slotB = slotA; for (i++; i < md->name_count; i++) { slotB += md->name_entry_size; if (STRCMP_UC_UC(slotA + IMM2_SIZE, slotB + IMM2_SIZE) == 0) { offset = GET2(slotB, 0) << 1; condition = offset < offset_top && md->offset_vector[offset] >= 0; if (condition) break; } else break; } } } } /* Chose branch according to the condition */ ecode += condition? 1 + IMM2_SIZE : GET(ecode, 1); } else if (condcode == OP_DEF) /* DEFINE - always false */ { condition = FALSE; ecode += GET(ecode, 1); } /* The condition is an assertion. Call match() to evaluate it - setting md->match_function_type to MATCH_CONDASSERT causes it to stop at the end of an assertion. */ else { md->match_function_type = MATCH_CONDASSERT; RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, NULL, RM3); if (rrc == MATCH_MATCH) { if (md->end_offset_top > offset_top) offset_top = md->end_offset_top; /* Captures may have happened */ condition = TRUE; ecode += 1 + LINK_SIZE + GET(ecode, LINK_SIZE + 2); while (*ecode == OP_ALT) ecode += GET(ecode, 1); } /* PCRE doesn't allow the effect of (*THEN) to escape beyond an assertion; it is therefore treated as NOMATCH. */ else if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) { RRETURN(rrc); /* Need braces because of following else */ } else { condition = FALSE; ecode += codelink; } } /* We are now at the branch that is to be obeyed. As there is only one, can use tail recursion to avoid using another stack frame, except when there is unlimited repeat of a possibly empty group. In the latter case, a recursive call to match() is always required, unless the second alternative doesn't exist, in which case we can just plough on. Note that, for compatibility with Perl, the | in a conditional group is NOT treated as creating two alternatives. If a THEN is encountered in the branch, it propagates out to the enclosing alternative (unless nested in a deeper set of alternatives, of course). */ if (condition || *ecode == OP_ALT) { if (op != OP_SCOND) { ecode += 1 + LINK_SIZE; goto TAIL_RECURSE; } md->match_function_type = MATCH_CBEGROUP; RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, eptrb, RM49); RRETURN(rrc); } /* Condition false & no alternative; continue after the group. */ else { ecode += 1 + LINK_SIZE; } break; /* Before OP_ACCEPT there may be any number of OP_CLOSE opcodes, to close any currently open capturing brackets. */ case OP_CLOSE: number = GET2(ecode, 1); /* Must be less than 65536 */ offset = number << 1; #ifdef PCRE_DEBUG printf("end bracket %d at *ACCEPT", number); printf("\n"); #endif md->capture_last = (md->capture_last & OVFLMASK) | number; if (offset >= md->offset_max) md->capture_last |= OVFLBIT; else { md->offset_vector[offset] = md->offset_vector[md->offset_end - number]; md->offset_vector[offset+1] = (int)(eptr - md->start_subject); if (offset_top <= offset) offset_top = offset + 2; } ecode += 1 + IMM2_SIZE; break; /* End of the pattern, either real or forced. */ case OP_END: case OP_ACCEPT: case OP_ASSERT_ACCEPT: /* If we have matched an empty string, fail if not in an assertion and not in a recursion if either PCRE_NOTEMPTY is set, or if PCRE_NOTEMPTY_ATSTART is set and we have matched at the start of the subject. In both cases, backtracking will then try other alternatives, if any. */ if (eptr == mstart && op != OP_ASSERT_ACCEPT && md->recursive == NULL && (md->notempty || (md->notempty_atstart && mstart == md->start_subject + md->start_offset))) RRETURN(MATCH_NOMATCH); /* Otherwise, we have a match. */ md->end_match_ptr = eptr; /* Record where we ended */ md->end_offset_top = offset_top; /* and how many extracts were taken */ md->start_match_ptr = mstart; /* and the start (\K can modify) */ /* For some reason, the macros don't work properly if an expression is given as the argument to RRETURN when the heap is in use. */ rrc = (op == OP_END)? MATCH_MATCH : MATCH_ACCEPT; RRETURN(rrc); /* Assertion brackets. Check the alternative branches in turn - the matching won't pass the KET for an assertion. If any one branch matches, the assertion is true. Lookbehind assertions have an OP_REVERSE item at the start of each branch to move the current point backwards, so the code at this level is identical to the lookahead case. When the assertion is part of a condition, we want to return immediately afterwards. The caller of this incarnation of the match() function will have set MATCH_CONDASSERT in md->match_function type, and one of these opcodes will be the first opcode that is processed. We use a local variable that is preserved over calls to match() to remember this case. */ case OP_ASSERT: case OP_ASSERTBACK: save_mark = md->mark; if (md->match_function_type == MATCH_CONDASSERT) { condassert = TRUE; md->match_function_type = 0; } else condassert = FALSE; do { RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, NULL, RM4); if (rrc == MATCH_MATCH || rrc == MATCH_ACCEPT) { mstart = md->start_match_ptr; /* In case \K reset it */ break; } md->mark = save_mark; /* A COMMIT failure must fail the entire assertion, without trying any subsequent branches. */ if (rrc == MATCH_COMMIT) RRETURN(MATCH_NOMATCH); /* PCRE does not allow THEN to escape beyond an assertion; it is treated as NOMATCH. */ if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) RRETURN(rrc); ecode += GET(ecode, 1); } while (*ecode == OP_ALT); if (*ecode == OP_KET) RRETURN(MATCH_NOMATCH); /* If checking an assertion for a condition, return MATCH_MATCH. */ if (condassert) RRETURN(MATCH_MATCH); /* Continue from after the assertion, updating the offsets high water mark, since extracts may have been taken during the assertion. */ do ecode += GET(ecode,1); while (*ecode == OP_ALT); ecode += 1 + LINK_SIZE; offset_top = md->end_offset_top; continue; /* Negative assertion: all branches must fail to match. Encountering SKIP, PRUNE, or COMMIT means we must assume failure without checking subsequent branches. */ case OP_ASSERT_NOT: case OP_ASSERTBACK_NOT: save_mark = md->mark; if (md->match_function_type == MATCH_CONDASSERT) { condassert = TRUE; md->match_function_type = 0; } else condassert = FALSE; do { RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, NULL, RM5); md->mark = save_mark; if (rrc == MATCH_MATCH || rrc == MATCH_ACCEPT) RRETURN(MATCH_NOMATCH); if (rrc == MATCH_SKIP || rrc == MATCH_PRUNE || rrc == MATCH_COMMIT) { do ecode += GET(ecode,1); while (*ecode == OP_ALT); break; } /* PCRE does not allow THEN to escape beyond an assertion; it is treated as NOMATCH. */ if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) RRETURN(rrc); ecode += GET(ecode,1); } while (*ecode == OP_ALT); if (condassert) RRETURN(MATCH_MATCH); /* Condition assertion */ ecode += 1 + LINK_SIZE; continue; /* Move the subject pointer back. This occurs only at the start of each branch of a lookbehind assertion. If we are too close to the start to move back, this match function fails. When working with UTF-8 we move back a number of characters, not bytes. */ case OP_REVERSE: #ifdef SUPPORT_UTF if (utf) { i = GET(ecode, 1); while (i-- > 0) { eptr--; if (eptr < md->start_subject) RRETURN(MATCH_NOMATCH); BACKCHAR(eptr); } } else #endif /* No UTF-8 support, or not in UTF-8 mode: count is byte count */ { eptr -= GET(ecode, 1); if (eptr < md->start_subject) RRETURN(MATCH_NOMATCH); } /* Save the earliest consulted character, then skip to next op code */ if (eptr < md->start_used_ptr) md->start_used_ptr = eptr; ecode += 1 + LINK_SIZE; break; /* The callout item calls an external function, if one is provided, passing details of the match so far. This is mainly for debugging, though the function is able to force a failure. */ case OP_CALLOUT: if (PUBL(callout) != NULL) { PUBL(callout_block) cb; cb.version = 2; /* Version 1 of the callout block */ cb.callout_number = ecode[1]; cb.offset_vector = md->offset_vector; #if defined COMPILE_PCRE8 cb.subject = (PCRE_SPTR)md->start_subject; #elif defined COMPILE_PCRE16 cb.subject = (PCRE_SPTR16)md->start_subject; #elif defined COMPILE_PCRE32 cb.subject = (PCRE_SPTR32)md->start_subject; #endif cb.subject_length = (int)(md->end_subject - md->start_subject); cb.start_match = (int)(mstart - md->start_subject); cb.current_position = (int)(eptr - md->start_subject); cb.pattern_position = GET(ecode, 2); cb.next_item_length = GET(ecode, 2 + LINK_SIZE); cb.capture_top = offset_top/2; cb.capture_last = md->capture_last & CAPLMASK; /* Internal change requires this for API compatibility. */ if (cb.capture_last == 0) cb.capture_last = -1; cb.callout_data = md->callout_data; cb.mark = md->nomatch_mark; if ((rrc = (*PUBL(callout))(&cb)) > 0) RRETURN(MATCH_NOMATCH); if (rrc < 0) RRETURN(rrc); } ecode += 2 + 2*LINK_SIZE; break; /* Recursion either matches the current regex, or some subexpression. The offset data is the offset to the starting bracket from the start of the whole pattern. (This is so that it works from duplicated subpatterns.) The state of the capturing groups is preserved over recursion, and re-instated afterwards. We don't know how many are started and not yet finished (offset_top records the completed total) so we just have to save all the potential data. There may be up to 65535 such values, which is too large to put on the stack, but using malloc for small numbers seems expensive. As a compromise, the stack is used when there are no more than REC_STACK_SAVE_MAX values to store; otherwise malloc is used. There are also other values that have to be saved. We use a chained sequence of blocks that actually live on the stack. Thanks to Robin Houston for the original version of this logic. It has, however, been hacked around a lot, so he is not to blame for the current way it works. */ case OP_RECURSE: { recursion_info *ri; unsigned int recno; callpat = md->start_code + GET(ecode, 1); recno = (callpat == md->start_code)? 0 : GET2(callpat, 1 + LINK_SIZE); /* Check for repeating a recursion without advancing the subject pointer. This should catch convoluted mutual recursions. (Some simple cases are caught at compile time.) */ for (ri = md->recursive; ri != NULL; ri = ri->prevrec) if (recno == ri->group_num && eptr == ri->subject_position) RRETURN(PCRE_ERROR_RECURSELOOP); /* Add to "recursing stack" */ new_recursive.group_num = recno; new_recursive.saved_capture_last = md->capture_last; new_recursive.subject_position = eptr; new_recursive.prevrec = md->recursive; md->recursive = &new_recursive; /* Where to continue from afterwards */ ecode += 1 + LINK_SIZE; /* Now save the offset data */ new_recursive.saved_max = md->offset_end; if (new_recursive.saved_max <= REC_STACK_SAVE_MAX) new_recursive.offset_save = stacksave; else { new_recursive.offset_save = (int *)(PUBL(malloc))(new_recursive.saved_max * sizeof(int)); if (new_recursive.offset_save == NULL) RRETURN(PCRE_ERROR_NOMEMORY); } memcpy(new_recursive.offset_save, md->offset_vector, new_recursive.saved_max * sizeof(int)); /* OK, now we can do the recursion. After processing each alternative, restore the offset data and the last captured value. If there were nested recursions, md->recursive might be changed, so reset it before looping. */ DPRINTF(("Recursing into group %d\n", new_recursive.group_num)); cbegroup = (*callpat >= OP_SBRA); do { if (cbegroup) md->match_function_type = MATCH_CBEGROUP; RMATCH(eptr, callpat + PRIV(OP_lengths)[*callpat], offset_top, md, eptrb, RM6); memcpy(md->offset_vector, new_recursive.offset_save, new_recursive.saved_max * sizeof(int)); md->capture_last = new_recursive.saved_capture_last; md->recursive = new_recursive.prevrec; if (rrc == MATCH_MATCH || rrc == MATCH_ACCEPT) { DPRINTF(("Recursion matched\n")); if (new_recursive.offset_save != stacksave) (PUBL(free))(new_recursive.offset_save); /* Set where we got to in the subject, and reset the start in case it was changed by \K. This *is* propagated back out of a recursion, for Perl compatibility. */ eptr = md->end_match_ptr; mstart = md->start_match_ptr; goto RECURSION_MATCHED; /* Exit loop; end processing */ } /* PCRE does not allow THEN or COMMIT to escape beyond a recursion; it is treated as NOMATCH. */ else if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN && rrc != MATCH_COMMIT) { DPRINTF(("Recursion gave error %d\n", rrc)); if (new_recursive.offset_save != stacksave) (PUBL(free))(new_recursive.offset_save); RRETURN(rrc); } md->recursive = &new_recursive; callpat += GET(callpat, 1); } while (*callpat == OP_ALT); DPRINTF(("Recursion didn't match\n")); md->recursive = new_recursive.prevrec; if (new_recursive.offset_save != stacksave) (PUBL(free))(new_recursive.offset_save); RRETURN(MATCH_NOMATCH); } RECURSION_MATCHED: break; /* An alternation is the end of a branch; scan along to find the end of the bracketed group and go to there. */ case OP_ALT: do ecode += GET(ecode,1); while (*ecode == OP_ALT); break; /* BRAZERO, BRAMINZERO and SKIPZERO occur just before a bracket group, indicating that it may occur zero times. It may repeat infinitely, or not at all - i.e. it could be ()* or ()? or even (){0} in the pattern. Brackets with fixed upper repeat limits are compiled as a number of copies, with the optional ones preceded by BRAZERO or BRAMINZERO. */ case OP_BRAZERO: next = ecode + 1; RMATCH(eptr, next, offset_top, md, eptrb, RM10); if (rrc != MATCH_NOMATCH) RRETURN(rrc); do next += GET(next, 1); while (*next == OP_ALT); ecode = next + 1 + LINK_SIZE; break; case OP_BRAMINZERO: next = ecode + 1; do next += GET(next, 1); while (*next == OP_ALT); RMATCH(eptr, next + 1+LINK_SIZE, offset_top, md, eptrb, RM11); if (rrc != MATCH_NOMATCH) RRETURN(rrc); ecode++; break; case OP_SKIPZERO: next = ecode+1; do next += GET(next,1); while (*next == OP_ALT); ecode = next + 1 + LINK_SIZE; break; /* BRAPOSZERO occurs before a possessive bracket group. Don't do anything here; just jump to the group, with allow_zero set TRUE. */ case OP_BRAPOSZERO: op = *(++ecode); allow_zero = TRUE; if (op == OP_CBRAPOS || op == OP_SCBRAPOS) goto POSSESSIVE_CAPTURE; goto POSSESSIVE_NON_CAPTURE; /* End of a group, repeated or non-repeating. */ case OP_KET: case OP_KETRMIN: case OP_KETRMAX: case OP_KETRPOS: prev = ecode - GET(ecode, 1); /* If this was a group that remembered the subject start, in order to break infinite repeats of empty string matches, retrieve the subject start from the chain. Otherwise, set it NULL. */ if (*prev >= OP_SBRA || *prev == OP_ONCE) { saved_eptr = eptrb->epb_saved_eptr; /* Value at start of group */ eptrb = eptrb->epb_prev; /* Backup to previous group */ } else saved_eptr = NULL; /* If we are at the end of an assertion group or a non-capturing atomic group, stop matching and return MATCH_MATCH, but record the current high water mark for use by positive assertions. We also need to record the match start in case it was changed by \K. */ if ((*prev >= OP_ASSERT && *prev <= OP_ASSERTBACK_NOT) || *prev == OP_ONCE_NC) { md->end_match_ptr = eptr; /* For ONCE_NC */ md->end_offset_top = offset_top; md->start_match_ptr = mstart; RRETURN(MATCH_MATCH); /* Sets md->mark */ } /* For capturing groups we have to check the group number back at the start and if necessary complete handling an extraction by setting the offsets and bumping the high water mark. Whole-pattern recursion is coded as a recurse into group 0, so it won't be picked up here. Instead, we catch it when the OP_END is reached. Other recursion is handled here. We just have to record the current subject position and start match pointer and give a MATCH return. */ if (*prev == OP_CBRA || *prev == OP_SCBRA || *prev == OP_CBRAPOS || *prev == OP_SCBRAPOS) { number = GET2(prev, 1+LINK_SIZE); offset = number << 1; #ifdef PCRE_DEBUG printf("end bracket %d", number); printf("\n"); #endif /* Handle a recursively called group. */ if (md->recursive != NULL && md->recursive->group_num == number) { md->end_match_ptr = eptr; md->start_match_ptr = mstart; RRETURN(MATCH_MATCH); } /* Deal with capturing */ md->capture_last = (md->capture_last & OVFLMASK) | number; if (offset >= md->offset_max) md->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 int *iptr = md->offset_vector + offset_top; register int *iend = md->offset_vector + offset; while (iptr < iend) *iptr++ = -1; } /* Now make the extraction */ md->offset_vector[offset] = md->offset_vector[md->offset_end - number]; md->offset_vector[offset+1] = (int)(eptr - md->start_subject); if (offset_top <= offset) offset_top = offset + 2; } } /* For an ordinary non-repeating ket, just continue at this level. This also happens for a repeating ket if no characters were matched in the group. This is the forcible breaking of infinite loops as implemented in Perl 5.005. For a non-repeating atomic group that includes captures, establish a backup point by processing the rest of the pattern at a lower level. If this results in a NOMATCH return, pass MATCH_ONCE back to the original OP_ONCE level, thereby bypassing intermediate backup points, but resetting any captures that happened along the way. */ if (*ecode == OP_KET || eptr == saved_eptr) { if (*prev == OP_ONCE) { RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, eptrb, RM12); if (rrc != MATCH_NOMATCH) RRETURN(rrc); md->once_target = prev; /* Level at which to change to MATCH_NOMATCH */ RRETURN(MATCH_ONCE); } ecode += 1 + LINK_SIZE; /* Carry on at this level */ break; } /* OP_KETRPOS is a possessive repeating ket. Remember the current position, and return the MATCH_KETRPOS. This makes it possible to do the repeats one at a time from the outer level, thus saving stack. */ if (*ecode == OP_KETRPOS) { md->end_match_ptr = eptr; md->end_offset_top = offset_top; RRETURN(MATCH_KETRPOS); } /* The normal repeating kets try the rest of the pattern or restart from the preceding bracket, in the appropriate order. In the second case, we can use tail recursion to avoid using another stack frame, unless we have an an atomic group or an unlimited repeat of a group that can match an empty string. */ if (*ecode == OP_KETRMIN) { RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, eptrb, RM7); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (*prev == OP_ONCE) { RMATCH(eptr, prev, offset_top, md, eptrb, RM8); if (rrc != MATCH_NOMATCH) RRETURN(rrc); md->once_target = prev; /* Level at which to change to MATCH_NOMATCH */ RRETURN(MATCH_ONCE); } if (*prev >= OP_SBRA) /* Could match an empty string */ { RMATCH(eptr, prev, offset_top, md, eptrb, RM50); RRETURN(rrc); } ecode = prev; goto TAIL_RECURSE; } else /* OP_KETRMAX */ { RMATCH(eptr, prev, offset_top, md, eptrb, RM13); if (rrc == MATCH_ONCE && md->once_target == prev) rrc = MATCH_NOMATCH; if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (*prev == OP_ONCE) { RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, eptrb, RM9); if (rrc != MATCH_NOMATCH) RRETURN(rrc); md->once_target = prev; RRETURN(MATCH_ONCE); } ecode += 1 + LINK_SIZE; goto TAIL_RECURSE; } /* Control never gets here */ /* Not multiline mode: start of subject assertion, unless notbol. */ case OP_CIRC: if (md->notbol && eptr == md->start_subject) RRETURN(MATCH_NOMATCH); /* Start of subject assertion */ case OP_SOD: if (eptr != md->start_subject) RRETURN(MATCH_NOMATCH); ecode++; break; /* Multiline mode: start of subject unless notbol, or after any newline. */ case OP_CIRCM: if (md->notbol && eptr == md->start_subject) RRETURN(MATCH_NOMATCH); if (eptr != md->start_subject && (eptr == md->end_subject || !WAS_NEWLINE(eptr))) RRETURN(MATCH_NOMATCH); ecode++; break; /* Start of match assertion */ case OP_SOM: if (eptr != md->start_subject + md->start_offset) RRETURN(MATCH_NOMATCH); ecode++; break; /* Reset the start of match point */ case OP_SET_SOM: mstart = eptr; ecode++; break; /* Multiline mode: assert before any newline, or before end of subject unless noteol is set. */ case OP_DOLLM: if (eptr < md->end_subject) { if (!IS_NEWLINE(eptr)) { if (md->partial != 0 && eptr + 1 >= md->end_subject && NLBLOCK->nltype == NLTYPE_FIXED && NLBLOCK->nllen == 2 && RAWUCHARTEST(eptr) == NLBLOCK->nl[0]) { md->hitend = TRUE; if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL); } RRETURN(MATCH_NOMATCH); } } else { if (md->noteol) RRETURN(MATCH_NOMATCH); SCHECK_PARTIAL(); } ecode++; break; /* Not multiline mode: assert before a terminating newline or before end of subject unless noteol is set. */ case OP_DOLL: if (md->noteol) RRETURN(MATCH_NOMATCH); if (!md->endonly) goto ASSERT_NL_OR_EOS; /* ... else fall through for endonly */ /* End of subject assertion (\z) */ case OP_EOD: if (eptr < md->end_subject) RRETURN(MATCH_NOMATCH); SCHECK_PARTIAL(); ecode++; break; /* End of subject or ending \n assertion (\Z) */ case OP_EODN: ASSERT_NL_OR_EOS: if (eptr < md->end_subject && (!IS_NEWLINE(eptr) || eptr != md->end_subject - md->nllen)) { if (md->partial != 0 && eptr + 1 >= md->end_subject && NLBLOCK->nltype == NLTYPE_FIXED && NLBLOCK->nllen == 2 && RAWUCHARTEST(eptr) == NLBLOCK->nl[0]) { md->hitend = TRUE; if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL); } RRETURN(MATCH_NOMATCH); } /* Either at end of string or \n before end. */ SCHECK_PARTIAL(); ecode++; break; /* Word boundary assertions */ case OP_NOT_WORD_BOUNDARY: case OP_WORD_BOUNDARY: { /* Find out if the previous and current characters are "word" characters. It takes a bit more work in UTF-8 mode. Characters > 255 are assumed to be "non-word" characters. Remember the earliest consulted character for partial matching. */ #ifdef SUPPORT_UTF if (utf) { /* Get status of previous character */ if (eptr == md->start_subject) prev_is_word = FALSE; else { PCRE_PUCHAR lastptr = eptr - 1; BACKCHAR(lastptr); if (lastptr < md->start_used_ptr) md->start_used_ptr = lastptr; GETCHAR(c, lastptr); #ifdef SUPPORT_UCP if (md->use_ucp) { if (c == '_') prev_is_word = TRUE; else { int cat = UCD_CATEGORY(c); prev_is_word = (cat == ucp_L || cat == ucp_N); } } else #endif prev_is_word = c < 256 && (md->ctypes[c] & ctype_word) != 0; } /* Get status of next character */ if (eptr >= md->end_subject) { SCHECK_PARTIAL(); cur_is_word = FALSE; } else { GETCHAR(c, eptr); #ifdef SUPPORT_UCP if (md->use_ucp) { if (c == '_') cur_is_word = TRUE; else { int cat = UCD_CATEGORY(c); cur_is_word = (cat == ucp_L || cat == ucp_N); } } else #endif cur_is_word = c < 256 && (md->ctypes[c] & ctype_word) != 0; } } else #endif /* Not in UTF-8 mode, but we may still have PCRE_UCP set, and for consistency with the behaviour of \w we do use it in this case. */ { /* Get status of previous character */ if (eptr == md->start_subject) prev_is_word = FALSE; else { if (eptr <= md->start_used_ptr) md->start_used_ptr = eptr - 1; #ifdef SUPPORT_UCP if (md->use_ucp) { c = eptr[-1]; if (c == '_') prev_is_word = TRUE; else { int cat = UCD_CATEGORY(c); prev_is_word = (cat == ucp_L || cat == ucp_N); } } else #endif prev_is_word = MAX_255(eptr[-1]) && ((md->ctypes[eptr[-1]] & ctype_word) != 0); } /* Get status of next character */ if (eptr >= md->end_subject) { SCHECK_PARTIAL(); cur_is_word = FALSE; } else #ifdef SUPPORT_UCP if (md->use_ucp) { c = *eptr; if (c == '_') cur_is_word = TRUE; else { int cat = UCD_CATEGORY(c); cur_is_word = (cat == ucp_L || cat == ucp_N); } } else #endif cur_is_word = MAX_255(*eptr) && ((md->ctypes[*eptr] & ctype_word) != 0); } /* Now see if the situation is what we want */ if ((*ecode++ == OP_WORD_BOUNDARY)? cur_is_word == prev_is_word : cur_is_word != prev_is_word) RRETURN(MATCH_NOMATCH); } break; /* Match any single character type except newline; have to take care with CRLF newlines and partial matching. */ case OP_ANY: if (IS_NEWLINE(eptr)) RRETURN(MATCH_NOMATCH); if (md->partial != 0 && eptr + 1 >= md->end_subject && NLBLOCK->nltype == NLTYPE_FIXED && NLBLOCK->nllen == 2 && RAWUCHARTEST(eptr) == NLBLOCK->nl[0]) { md->hitend = TRUE; if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL); } /* Fall through */ /* Match any single character whatsoever. */ case OP_ALLANY: if (eptr >= md->end_subject) /* DO NOT merge the eptr++ here; it must */ { /* not be updated before SCHECK_PARTIAL. */ SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } eptr++; #ifdef SUPPORT_UTF if (utf) ACROSSCHAR(eptr < md->end_subject, *eptr, eptr++); #endif ecode++; break; /* Match a single byte, even in UTF-8 mode. This opcode really does match any byte, even newline, independent of the setting of PCRE_DOTALL. */ case OP_ANYBYTE: if (eptr >= md->end_subject) /* DO NOT merge the eptr++ here; it must */ { /* not be updated before SCHECK_PARTIAL. */ SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } eptr++; ecode++; break; case OP_NOT_DIGIT: if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if ( #if defined SUPPORT_UTF || !(defined COMPILE_PCRE8) c < 256 && #endif (md->ctypes[c] & ctype_digit) != 0 ) RRETURN(MATCH_NOMATCH); ecode++; break; case OP_DIGIT: if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if ( #if defined SUPPORT_UTF || !(defined COMPILE_PCRE8) c > 255 || #endif (md->ctypes[c] & ctype_digit) == 0 ) RRETURN(MATCH_NOMATCH); ecode++; break; case OP_NOT_WHITESPACE: if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if ( #if defined SUPPORT_UTF || !(defined COMPILE_PCRE8) c < 256 && #endif (md->ctypes[c] & ctype_space) != 0 ) RRETURN(MATCH_NOMATCH); ecode++; break; case OP_WHITESPACE: if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if ( #if defined SUPPORT_UTF || !(defined COMPILE_PCRE8) c > 255 || #endif (md->ctypes[c] & ctype_space) == 0 ) RRETURN(MATCH_NOMATCH); ecode++; break; case OP_NOT_WORDCHAR: if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if ( #if defined SUPPORT_UTF || !(defined COMPILE_PCRE8) c < 256 && #endif (md->ctypes[c] & ctype_word) != 0 ) RRETURN(MATCH_NOMATCH); ecode++; break; case OP_WORDCHAR: if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if ( #if defined SUPPORT_UTF || !(defined COMPILE_PCRE8) c > 255 || #endif (md->ctypes[c] & ctype_word) == 0 ) RRETURN(MATCH_NOMATCH); ecode++; break; case OP_ANYNL: if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); switch(c) { default: RRETURN(MATCH_NOMATCH); case CHAR_CR: if (eptr >= md->end_subject) { SCHECK_PARTIAL(); } else if (RAWUCHARTEST(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 (md->bsr_anycrlf) RRETURN(MATCH_NOMATCH); break; } ecode++; break; case OP_NOT_HSPACE: if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); switch(c) { HSPACE_CASES: RRETURN(MATCH_NOMATCH); /* Byte and multibyte cases */ default: break; } ecode++; break; case OP_HSPACE: if (eptr >= md->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 >= md->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 >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); switch(c) { VSPACE_CASES: break; default: RRETURN(MATCH_NOMATCH); } ecode++; break; #ifdef SUPPORT_UCP /* Check the next character by Unicode property. We will get here only if the support is in the binary; otherwise a compile-time error occurs. */ case OP_PROP: case OP_NOTPROP: if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); { const pcre_uint32 *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; case PT_SPACE: /* Perl space */ if ((PRIV(ucp_gentype)[prop->chartype] == ucp_Z || c == CHAR_HT || c == CHAR_NL || c == CHAR_FF || c == CHAR_CR) == (op == OP_NOTPROP)) RRETURN(MATCH_NOMATCH); break; case PT_PXSPACE: /* POSIX space */ if ((PRIV(ucp_gentype)[prop->chartype] == ucp_Z || c == CHAR_HT || c == CHAR_NL || c == CHAR_VT || c == CHAR_FF || c == CHAR_CR) == (op == OP_NOTPROP)) RRETURN(MATCH_NOMATCH); break; case PT_WORD: if ((PRIV(ucp_gentype)[prop->chartype] == ucp_L || PRIV(ucp_gentype)[prop->chartype] == ucp_N || c == CHAR_UNDERSCORE) == (op == OP_NOTPROP)) RRETURN(MATCH_NOMATCH); break; 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(PCRE_ERROR_INTERNAL); } ecode += 3; } break; /* Match an extended Unicode sequence. We will get here only if the support is in the binary; otherwise a compile-time error occurs. */ case OP_EXTUNI: if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } else { int lgb, rgb; GETCHARINCTEST(c, eptr); lgb = UCD_GRAPHBREAK(c); while (eptr < md->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_UCP */ /* Match a back reference, possibly repeatedly. Look past the end of the item to see if there is repeat information following. The code is similar to that for character classes, but repeated for efficiency. Then obey similar code to character type repeats - written out again for speed. However, if the referenced string is the empty string, always treat it as matched, any number of times (otherwise there could be infinite loops). */ case OP_REF: case OP_REFI: caseless = op == OP_REFI; offset = GET2(ecode, 1) << 1; /* Doubled ref number */ ecode += 1 + IMM2_SIZE; /* If the reference is unset, there are two possibilities: (a) In the default, Perl-compatible state, set the length negative; this ensures that every attempt at a match fails. We can't just fail here, because of the possibility of quantifiers with zero minima. (b) If the JavaScript compatibility flag is set, set the length to zero so that the back reference matches an empty string. Otherwise, set the length to the length of what was matched by the referenced subpattern. */ if (offset >= offset_top || md->offset_vector[offset] < 0) length = (md->jscript_compat)? 0 : -1; else length = md->offset_vector[offset+1] - md->offset_vector[offset]; /* Set up for repetition, or handle the non-repeated case */ switch (*ecode) { case OP_CRSTAR: case OP_CRMINSTAR: case OP_CRPLUS: case OP_CRMINPLUS: case OP_CRQUERY: case OP_CRMINQUERY: c = *ecode++ - OP_CRSTAR; minimize = (c & 1) != 0; min = rep_min[c]; /* Pick up values from tables; */ max = rep_max[c]; /* zero for max => infinity */ if (max == 0) max = INT_MAX; break; case OP_CRRANGE: case OP_CRMINRANGE: minimize = (*ecode == OP_CRMINRANGE); min = GET2(ecode, 1); max = GET2(ecode, 1 + IMM2_SIZE); if (max == 0) max = INT_MAX; ecode += 1 + 2 * IMM2_SIZE; break; default: /* No repeat follows */ if ((length = match_ref(offset, eptr, length, md, caseless)) < 0) { if (length == -2) eptr = md->end_subject; /* Partial match */ CHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } eptr += length; continue; /* With the main loop */ } /* Handle repeated back references. If the length of the reference is zero, just continue with the main loop. If the length is negative, it means the reference is unset in non-Java-compatible mode. If the minimum is zero, we can continue at the same level without recursion. For any other minimum, carrying on will result in NOMATCH. */ if (length == 0) continue; if (length < 0 && min == 0) continue; /* First, ensure the minimum number of matches are present. We get back the length of the reference string explicitly rather than passing the address of eptr, so that eptr can be a register variable. */ for (i = 1; i <= min; i++) { int slength; if ((slength = match_ref(offset, eptr, length, md, caseless)) < 0) { if (slength == -2) eptr = md->end_subject; /* Partial match */ CHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } eptr += slength; } /* If min = max, continue at the same level without recursion. They are not both allowed to be zero. */ if (min == max) continue; /* If minimizing, keep trying and advancing the pointer */ if (minimize) { for (fi = min;; fi++) { int slength; RMATCH(eptr, ecode, offset_top, md, eptrb, RM14); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if ((slength = match_ref(offset, eptr, length, md, caseless)) < 0) { if (slength == -2) eptr = md->end_subject; /* Partial match */ CHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } eptr += slength; } /* Control never gets here */ } /* If maximizing, find the longest string and work backwards */ else { pp = eptr; for (i = min; i < max; i++) { int slength; if ((slength = match_ref(offset, eptr, length, md, caseless)) < 0) { /* Can't use CHECK_PARTIAL because we don't want to update eptr in the soft partial matching case. */ if (slength == -2 && md->partial != 0 && md->end_subject > md->start_used_ptr) { md->hitend = TRUE; if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL); } break; } eptr += slength; } while (eptr >= pp) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM15); if (rrc != MATCH_NOMATCH) RRETURN(rrc); eptr -= length; } RRETURN(MATCH_NOMATCH); } /* Control never gets here */ /* Match a bit-mapped character class, possibly repeatedly. This op code is used when all the characters in the class have values in the range 0-255, and either the matching is caseful, or the characters are in the range 0-127 when UTF-8 processing is enabled. The only difference between OP_CLASS and OP_NCLASS occurs when a data character outside the range is encountered. First, look past the end of the item to see if there is repeat information following. Then obey similar code to character type repeats - written out again for speed. */ case OP_NCLASS: case OP_CLASS: { /* The data variable is saved across frames, so the byte map needs to be stored there. */ #define BYTE_MAP ((pcre_uint8 *)data) data = ecode + 1; /* Save for matching */ ecode += 1 + (32 / sizeof(pcre_uchar)); /* Advance past the item */ switch (*ecode) { case OP_CRSTAR: case OP_CRMINSTAR: case OP_CRPLUS: case OP_CRMINPLUS: case OP_CRQUERY: case OP_CRMINQUERY: c = *ecode++ - OP_CRSTAR; minimize = (c & 1) != 0; min = rep_min[c]; /* Pick up values from tables; */ max = rep_max[c]; /* zero for max => infinity */ if (max == 0) max = INT_MAX; break; case OP_CRRANGE: case OP_CRMINRANGE: minimize = (*ecode == OP_CRMINRANGE); min = GET2(ecode, 1); max = GET2(ecode, 1 + IMM2_SIZE); if (max == 0) max = INT_MAX; ecode += 1 + 2 * IMM2_SIZE; break; default: /* No repeat follows */ min = max = 1; break; } /* First, ensure the minimum number of matches are present. */ #ifdef SUPPORT_UTF if (utf) { for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINC(c, eptr); if (c > 255) { if (op == OP_CLASS) RRETURN(MATCH_NOMATCH); } else if ((BYTE_MAP[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH); } } else #endif /* Not UTF mode */ { for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } c = *eptr++; #ifndef COMPILE_PCRE8 if (c > 255) { if (op == OP_CLASS) RRETURN(MATCH_NOMATCH); } else #endif if ((BYTE_MAP[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH); } } /* If max == min we can continue with the main loop without the need to recurse. */ if (min == max) continue; /* If minimizing, keep testing the rest of the expression and advancing the pointer while it matches the class. */ if (minimize) { #ifdef SUPPORT_UTF if (utf) { for (fi = min;; fi++) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM16); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINC(c, eptr); if (c > 255) { if (op == OP_CLASS) RRETURN(MATCH_NOMATCH); } else if ((BYTE_MAP[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH); } } else #endif /* Not UTF mode */ { for (fi = min;; fi++) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM17); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } c = *eptr++; #ifndef COMPILE_PCRE8 if (c > 255) { if (op == OP_CLASS) RRETURN(MATCH_NOMATCH); } else #endif if ((BYTE_MAP[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH); } } /* Control never gets here */ } /* If maximizing, find the longest possible run, then work backwards. */ else { pp = eptr; #ifdef SUPPORT_UTF if (utf) { for (i = min; i < max; i++) { int len = 1; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } GETCHARLEN(c, eptr, len); if (c > 255) { if (op == OP_CLASS) break; } else if ((BYTE_MAP[c/8] & (1 << (c&7))) == 0) break; eptr += len; } for (;;) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM18); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (eptr-- == pp) break; /* Stop if tried at original pos */ BACKCHAR(eptr); } } else #endif /* Not UTF mode */ { for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } c = *eptr; #ifndef COMPILE_PCRE8 if (c > 255) { if (op == OP_CLASS) break; } else #endif if ((BYTE_MAP[c/8] & (1 << (c&7))) == 0) break; eptr++; } while (eptr >= pp) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM19); if (rrc != MATCH_NOMATCH) RRETURN(rrc); eptr--; } } RRETURN(MATCH_NOMATCH); } #undef BYTE_MAP } /* Control never gets here */ /* Match an extended character class. This opcode is encountered only when UTF-8 mode mode is supported. Nevertheless, we may not be in UTF-8 mode, because Unicode properties are supported in non-UTF-8 mode. */ #if defined SUPPORT_UTF || !defined COMPILE_PCRE8 case OP_XCLASS: { data = ecode + 1 + LINK_SIZE; /* Save for matching */ ecode += GET(ecode, 1); /* Advance past the item */ switch (*ecode) { case OP_CRSTAR: case OP_CRMINSTAR: case OP_CRPLUS: case OP_CRMINPLUS: case OP_CRQUERY: case OP_CRMINQUERY: c = *ecode++ - OP_CRSTAR; minimize = (c & 1) != 0; min = rep_min[c]; /* Pick up values from tables; */ max = rep_max[c]; /* zero for max => infinity */ if (max == 0) max = INT_MAX; break; case OP_CRRANGE: case OP_CRMINRANGE: minimize = (*ecode == OP_CRMINRANGE); min = GET2(ecode, 1); max = GET2(ecode, 1 + IMM2_SIZE); if (max == 0) max = INT_MAX; ecode += 1 + 2 * IMM2_SIZE; break; default: /* No repeat follows */ min = max = 1; break; } /* First, ensure the minimum number of matches are present. */ for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if (!PRIV(xclass)(c, data, utf)) RRETURN(MATCH_NOMATCH); } /* If max == min we can continue with the main loop without the need to recurse. */ if (min == max) continue; /* If minimizing, keep testing the rest of the expression and advancing the pointer while it matches the class. */ if (minimize) { for (fi = min;; fi++) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM20); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if (!PRIV(xclass)(c, data, utf)) RRETURN(MATCH_NOMATCH); } /* Control never gets here */ } /* If maximizing, find the longest possible run, then work backwards. */ else { pp = eptr; for (i = min; i < max; i++) { int len = 1; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } #ifdef SUPPORT_UTF GETCHARLENTEST(c, eptr, len); #else c = *eptr; #endif if (!PRIV(xclass)(c, data, utf)) break; eptr += len; } for(;;) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM21); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (eptr-- == pp) break; /* Stop if tried at original pos */ #ifdef SUPPORT_UTF if (utf) BACKCHAR(eptr); #endif } RRETURN(MATCH_NOMATCH); } /* Control never gets here */ } #endif /* End of XCLASS */ /* Match a single character, casefully */ case OP_CHAR: #ifdef SUPPORT_UTF if (utf) { length = 1; ecode++; GETCHARLEN(fc, ecode, length); if (length > md->end_subject - eptr) { CHECK_PARTIAL(); /* Not SCHECK_PARTIAL() */ RRETURN(MATCH_NOMATCH); } while (length-- > 0) if (*ecode++ != RAWUCHARINC(eptr)) RRETURN(MATCH_NOMATCH); } else #endif /* Not UTF mode */ { if (md->end_subject - eptr < 1) { SCHECK_PARTIAL(); /* This one can use SCHECK_PARTIAL() */ RRETURN(MATCH_NOMATCH); } if (ecode[1] != *eptr++) RRETURN(MATCH_NOMATCH); ecode += 2; } break; /* Match a single character, caselessly. If we are at the end of the subject, give up immediately. */ case OP_CHARI: if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } #ifdef SUPPORT_UTF if (utf) { length = 1; ecode++; GETCHARLEN(fc, ecode, length); /* If the pattern character's value is < 128, we have only one byte, and we know that its other case must also be one byte long, so we can use the fast lookup table. We know that there is at least one byte left in the subject. */ if (fc < 128) { pcre_uint32 cc = RAWUCHAR(eptr); if (md->lcc[fc] != TABLE_GET(cc, md->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 { pcre_uint32 dc; GETCHARINC(dc, eptr); ecode += length; /* If we have Unicode property support, we can use it to test the other case of the character, if there is one. */ if (fc != dc) { #ifdef SUPPORT_UCP if (dc != UCD_OTHERCASE(fc)) #endif RRETURN(MATCH_NOMATCH); } } } else #endif /* SUPPORT_UTF */ /* Not UTF mode */ { if (TABLE_GET(ecode[1], md->lcc, ecode[1]) != TABLE_GET(*eptr, md->lcc, *eptr)) RRETURN(MATCH_NOMATCH); eptr++; ecode += 2; } break; /* Match a single character repeatedly. */ case OP_EXACT: case OP_EXACTI: min = max = GET2(ecode, 1); ecode += 1 + IMM2_SIZE; goto REPEATCHAR; case OP_POSUPTO: case OP_POSUPTOI: possessive = TRUE; /* Fall through */ case OP_UPTO: case OP_UPTOI: case OP_MINUPTO: case OP_MINUPTOI: min = 0; max = GET2(ecode, 1); minimize = *ecode == OP_MINUPTO || *ecode == OP_MINUPTOI; ecode += 1 + IMM2_SIZE; goto REPEATCHAR; case OP_POSSTAR: case OP_POSSTARI: possessive = TRUE; min = 0; max = INT_MAX; ecode++; goto REPEATCHAR; case OP_POSPLUS: case OP_POSPLUSI: possessive = TRUE; min = 1; max = INT_MAX; ecode++; goto REPEATCHAR; case OP_POSQUERY: case OP_POSQUERYI: possessive = TRUE; min = 0; max = 1; ecode++; goto REPEATCHAR; case OP_STAR: case OP_STARI: case OP_MINSTAR: case OP_MINSTARI: case OP_PLUS: case OP_PLUSI: case OP_MINPLUS: case OP_MINPLUSI: case OP_QUERY: case OP_QUERYI: case OP_MINQUERY: case OP_MINQUERYI: c = *ecode++ - ((op < OP_STARI)? OP_STAR : OP_STARI); minimize = (c & 1) != 0; min = rep_min[c]; /* Pick up values from tables; */ max = rep_max[c]; /* zero for max => infinity */ if (max == 0) max = INT_MAX; /* Common code for all repeated single-character matches. */ REPEATCHAR: #ifdef SUPPORT_UTF if (utf) { length = 1; charptr = ecode; GETCHARLEN(fc, ecode, length); ecode += length; /* Handle multibyte character matching specially here. There is support for caseless matching if UCP support is present. */ if (length > 1) { #ifdef SUPPORT_UCP pcre_uint32 othercase; if (op >= OP_STARI && /* Caseless */ (othercase = UCD_OTHERCASE(fc)) != fc) oclength = PRIV(ord2utf)(othercase, occhars); else oclength = 0; #endif /* SUPPORT_UCP */ for (i = 1; i <= min; i++) { if (eptr <= md->end_subject - length && memcmp(eptr, charptr, IN_UCHARS(length)) == 0) eptr += length; #ifdef SUPPORT_UCP else if (oclength > 0 && eptr <= md->end_subject - oclength && memcmp(eptr, occhars, IN_UCHARS(oclength)) == 0) eptr += oclength; #endif /* SUPPORT_UCP */ else { CHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } } if (min == max) continue; if (minimize) { for (fi = min;; fi++) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM22); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr <= md->end_subject - length && memcmp(eptr, charptr, IN_UCHARS(length)) == 0) eptr += length; #ifdef SUPPORT_UCP else if (oclength > 0 && eptr <= md->end_subject - oclength && memcmp(eptr, occhars, IN_UCHARS(oclength)) == 0) eptr += oclength; #endif /* SUPPORT_UCP */ else { CHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } } /* Control never gets here */ } else /* Maximize */ { pp = eptr; for (i = min; i < max; i++) { if (eptr <= md->end_subject - length && memcmp(eptr, charptr, IN_UCHARS(length)) == 0) eptr += length; #ifdef SUPPORT_UCP else if (oclength > 0 && eptr <= md->end_subject - oclength && memcmp(eptr, occhars, IN_UCHARS(oclength)) == 0) eptr += oclength; #endif /* SUPPORT_UCP */ else { CHECK_PARTIAL(); break; } } if (possessive) continue; for(;;) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM23); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (eptr == pp) { RRETURN(MATCH_NOMATCH); } #ifdef SUPPORT_UCP eptr--; BACKCHAR(eptr); #else /* without SUPPORT_UCP */ eptr -= length; #endif /* SUPPORT_UCP */ } } /* Control never gets here */ } /* If the length of a UTF-8 character is 1, we fall through here, and obey the code as for non-UTF-8 characters below, though in this case the value of fc will always be < 128. */ } else #endif /* SUPPORT_UTF */ /* When not in UTF-8 mode, load a single-byte character. */ fc = *ecode++; /* The value of fc at this point is always one character, though we may or may not be in UTF mode. The code is duplicated for the caseless and caseful cases, for speed, since matching characters is likely to be quite common. First, ensure the minimum number of matches are present. If min = max, continue at the same level without recursing. Otherwise, if minimizing, keep trying the rest of the expression and advancing one matching character if failing, up to the maximum. Alternatively, if maximizing, find the maximum number of characters and work backwards. */ DPRINTF(("matching %c{%d,%d} against subject %.*s\n", fc, min, max, max, (char *)eptr)); if (op >= OP_STARI) /* Caseless */ { #ifdef COMPILE_PCRE8 /* fc must be < 128 if UTF is enabled. */ foc = md->fcc[fc]; #else #ifdef SUPPORT_UTF #ifdef SUPPORT_UCP if (utf && fc > 127) foc = UCD_OTHERCASE(fc); #else if (utf && fc > 127) foc = fc; #endif /* SUPPORT_UCP */ else #endif /* SUPPORT_UTF */ foc = TABLE_GET(fc, md->fcc, fc); #endif /* COMPILE_PCRE8 */ for (i = 1; i <= min; i++) { pcre_uint32 cc; /* Faster than pcre_uchar */ if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } cc = RAWUCHARTEST(eptr); if (fc != cc && foc != cc) RRETURN(MATCH_NOMATCH); eptr++; } if (min == max) continue; if (minimize) { for (fi = min;; fi++) { pcre_uint32 cc; /* Faster than pcre_uchar */ RMATCH(eptr, ecode, offset_top, md, eptrb, RM24); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } cc = RAWUCHARTEST(eptr); if (fc != cc && foc != cc) RRETURN(MATCH_NOMATCH); eptr++; } /* Control never gets here */ } else /* Maximize */ { pp = eptr; for (i = min; i < max; i++) { pcre_uint32 cc; /* Faster than pcre_uchar */ if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } cc = RAWUCHARTEST(eptr); if (fc != cc && foc != cc) break; eptr++; } if (possessive) continue; while (eptr >= pp) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM25); eptr--; if (rrc != MATCH_NOMATCH) RRETURN(rrc); } RRETURN(MATCH_NOMATCH); } /* Control never gets here */ } /* Caseful comparisons (includes all multi-byte characters) */ else { for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } if (fc != RAWUCHARINCTEST(eptr)) RRETURN(MATCH_NOMATCH); } if (min == max) continue; if (minimize) { for (fi = min;; fi++) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM26); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } if (fc != RAWUCHARINCTEST(eptr)) RRETURN(MATCH_NOMATCH); } /* Control never gets here */ } else /* Maximize */ { pp = eptr; for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } if (fc != RAWUCHARTEST(eptr)) break; eptr++; } if (possessive) continue; while (eptr >= pp) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM27); eptr--; if (rrc != MATCH_NOMATCH) RRETURN(rrc); } RRETURN(MATCH_NOMATCH); } } /* Control never gets here */ /* Match a negated single one-byte character. The character we are checking can be multibyte. */ case OP_NOT: case OP_NOTI: if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } #ifdef SUPPORT_UTF if (utf) { register pcre_uint32 ch, och; ecode++; GETCHARINC(ch, ecode); GETCHARINC(c, eptr); if (op == OP_NOT) { if (ch == c) RRETURN(MATCH_NOMATCH); } else { #ifdef SUPPORT_UCP if (ch > 127) och = UCD_OTHERCASE(ch); #else if (ch > 127) och = ch; #endif /* SUPPORT_UCP */ else och = TABLE_GET(ch, md->fcc, ch); if (ch == c || och == c) RRETURN(MATCH_NOMATCH); } } else #endif { register pcre_uint32 ch = ecode[1]; c = *eptr++; if (ch == c || (op == OP_NOTI && TABLE_GET(ch, md->fcc, ch) == c)) RRETURN(MATCH_NOMATCH); ecode += 2; } break; /* Match a negated single one-byte character repeatedly. This is almost a repeat of the code for a repeated single character, but I haven't found a nice way of commoning these up that doesn't require a test of the positive/negative option for each character match. Maybe that wouldn't add very much to the time taken, but character matching *is* what this is all about... */ case OP_NOTEXACT: case OP_NOTEXACTI: min = max = GET2(ecode, 1); ecode += 1 + IMM2_SIZE; goto REPEATNOTCHAR; case OP_NOTUPTO: case OP_NOTUPTOI: case OP_NOTMINUPTO: case OP_NOTMINUPTOI: min = 0; max = GET2(ecode, 1); minimize = *ecode == OP_NOTMINUPTO || *ecode == OP_NOTMINUPTOI; ecode += 1 + IMM2_SIZE; goto REPEATNOTCHAR; case OP_NOTPOSSTAR: case OP_NOTPOSSTARI: possessive = TRUE; min = 0; max = INT_MAX; ecode++; goto REPEATNOTCHAR; case OP_NOTPOSPLUS: case OP_NOTPOSPLUSI: possessive = TRUE; min = 1; max = INT_MAX; ecode++; goto REPEATNOTCHAR; case OP_NOTPOSQUERY: case OP_NOTPOSQUERYI: possessive = TRUE; min = 0; max = 1; ecode++; goto REPEATNOTCHAR; case OP_NOTPOSUPTO: case OP_NOTPOSUPTOI: possessive = TRUE; min = 0; max = GET2(ecode, 1); ecode += 1 + IMM2_SIZE; goto REPEATNOTCHAR; case OP_NOTSTAR: case OP_NOTSTARI: case OP_NOTMINSTAR: case OP_NOTMINSTARI: case OP_NOTPLUS: case OP_NOTPLUSI: case OP_NOTMINPLUS: case OP_NOTMINPLUSI: case OP_NOTQUERY: case OP_NOTQUERYI: case OP_NOTMINQUERY: case OP_NOTMINQUERYI: c = *ecode++ - ((op >= OP_NOTSTARI)? OP_NOTSTARI: OP_NOTSTAR); minimize = (c & 1) != 0; min = rep_min[c]; /* Pick up values from tables; */ max = rep_max[c]; /* zero for max => infinity */ if (max == 0) max = INT_MAX; /* Common code for all repeated single-byte matches. */ REPEATNOTCHAR: GETCHARINCTEST(fc, ecode); /* The code is duplicated for the caseless and caseful cases, for speed, since matching characters is likely to be quite common. First, ensure the minimum number of matches are present. If min = max, continue at the same level without recursing. Otherwise, if minimizing, keep trying the rest of the expression and advancing one matching character if failing, up to the maximum. Alternatively, if maximizing, find the maximum number of characters and work backwards. */ DPRINTF(("negative matching %c{%d,%d} against subject %.*s\n", fc, min, max, max, (char *)eptr)); if (op >= OP_NOTSTARI) /* Caseless */ { #ifdef SUPPORT_UTF #ifdef SUPPORT_UCP if (utf && fc > 127) foc = UCD_OTHERCASE(fc); #else if (utf && fc > 127) foc = fc; #endif /* SUPPORT_UCP */ else #endif /* SUPPORT_UTF */ foc = TABLE_GET(fc, md->fcc, fc); #ifdef SUPPORT_UTF if (utf) { register pcre_uint32 d; for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINC(d, eptr); if (fc == d || (unsigned int)foc == d) RRETURN(MATCH_NOMATCH); } } else #endif /* Not UTF mode */ { for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } if (fc == *eptr || foc == *eptr) RRETURN(MATCH_NOMATCH); eptr++; } } if (min == max) continue; if (minimize) { #ifdef SUPPORT_UTF if (utf) { register pcre_uint32 d; for (fi = min;; fi++) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM28); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINC(d, eptr); if (fc == d || (unsigned int)foc == d) RRETURN(MATCH_NOMATCH); } } else #endif /* Not UTF mode */ { for (fi = min;; fi++) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM29); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } if (fc == *eptr || foc == *eptr) RRETURN(MATCH_NOMATCH); eptr++; } } /* Control never gets here */ } /* Maximize case */ else { pp = eptr; #ifdef SUPPORT_UTF if (utf) { register pcre_uint32 d; for (i = min; i < max; i++) { int len = 1; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } GETCHARLEN(d, eptr, len); if (fc == d || (unsigned int)foc == d) break; eptr += len; } if (possessive) continue; for(;;) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM30); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (eptr-- == pp) break; /* Stop if tried at original pos */ BACKCHAR(eptr); } } else #endif /* Not UTF mode */ { for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } if (fc == *eptr || foc == *eptr) break; eptr++; } if (possessive) continue; while (eptr >= pp) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM31); if (rrc != MATCH_NOMATCH) RRETURN(rrc); eptr--; } } RRETURN(MATCH_NOMATCH); } /* Control never gets here */ } /* Caseful comparisons */ else { #ifdef SUPPORT_UTF if (utf) { register pcre_uint32 d; for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINC(d, eptr); if (fc == d) RRETURN(MATCH_NOMATCH); } } else #endif /* Not UTF mode */ { for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } if (fc == *eptr++) RRETURN(MATCH_NOMATCH); } } if (min == max) continue; if (minimize) { #ifdef SUPPORT_UTF if (utf) { register pcre_uint32 d; for (fi = min;; fi++) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM32); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINC(d, eptr); if (fc == d) RRETURN(MATCH_NOMATCH); } } else #endif /* Not UTF mode */ { for (fi = min;; fi++) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM33); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } if (fc == *eptr++) RRETURN(MATCH_NOMATCH); } } /* Control never gets here */ } /* Maximize case */ else { pp = eptr; #ifdef SUPPORT_UTF if (utf) { register pcre_uint32 d; for (i = min; i < max; i++) { int len = 1; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } GETCHARLEN(d, eptr, len); if (fc == d) break; eptr += len; } if (possessive) continue; for(;;) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM34); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (eptr-- == pp) break; /* Stop if tried at original pos */ BACKCHAR(eptr); } } else #endif /* Not UTF mode */ { for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } if (fc == *eptr) break; eptr++; } if (possessive) continue; while (eptr >= pp) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM35); if (rrc != MATCH_NOMATCH) RRETURN(rrc); eptr--; } } RRETURN(MATCH_NOMATCH); } } /* Control never gets here */ /* Match a single character type repeatedly; several different opcodes share code. This is very similar to the code for single characters, but we repeat it in the interests of efficiency. */ case OP_TYPEEXACT: min = max = GET2(ecode, 1); minimize = TRUE; ecode += 1 + IMM2_SIZE; goto REPEATTYPE; case OP_TYPEUPTO: case OP_TYPEMINUPTO: min = 0; max = GET2(ecode, 1); minimize = *ecode == OP_TYPEMINUPTO; ecode += 1 + IMM2_SIZE; goto REPEATTYPE; case OP_TYPEPOSSTAR: possessive = TRUE; min = 0; max = INT_MAX; ecode++; goto REPEATTYPE; case OP_TYPEPOSPLUS: possessive = TRUE; min = 1; max = INT_MAX; ecode++; goto REPEATTYPE; case OP_TYPEPOSQUERY: possessive = TRUE; min = 0; max = 1; ecode++; goto REPEATTYPE; case OP_TYPEPOSUPTO: possessive = TRUE; min = 0; max = GET2(ecode, 1); ecode += 1 + IMM2_SIZE; goto REPEATTYPE; case OP_TYPESTAR: case OP_TYPEMINSTAR: case OP_TYPEPLUS: case OP_TYPEMINPLUS: case OP_TYPEQUERY: case OP_TYPEMINQUERY: c = *ecode++ - OP_TYPESTAR; minimize = (c & 1) != 0; min = rep_min[c]; /* Pick up values from tables; */ max = rep_max[c]; /* zero for max => infinity */ if (max == 0) max = INT_MAX; /* Common code for all repeated single character type matches. Note that in UTF-8 mode, '.' matches a character of any length, but for the other character types, the valid characters are all one-byte long. */ REPEATTYPE: ctype = *ecode++; /* Code for the character type */ #ifdef SUPPORT_UCP if (ctype == OP_PROP || ctype == OP_NOTPROP) { prop_fail_result = ctype == OP_NOTPROP; prop_type = *ecode++; prop_value = *ecode++; } else prop_type = -1; #endif /* First, ensure the minimum number of matches are present. Use inline code for maximizing the speed, and do the type test once at the start (i.e. keep it out of the loop). Separate the UTF-8 code completely as that is tidier. Also separate the UCP code, which can be the same for both UTF-8 and single-bytes. */ if (min > 0) { #ifdef SUPPORT_UCP if (prop_type >= 0) { switch(prop_type) { case PT_ANY: if (prop_fail_result) RRETURN(MATCH_NOMATCH); for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); } break; case PT_LAMP: for (i = 1; i <= min; i++) { int chartype; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); chartype = UCD_CHARTYPE(c); if ((chartype == ucp_Lu || chartype == ucp_Ll || chartype == ucp_Lt) == prop_fail_result) RRETURN(MATCH_NOMATCH); } break; case PT_GC: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if ((UCD_CATEGORY(c) == prop_value) == prop_fail_result) RRETURN(MATCH_NOMATCH); } break; case PT_PC: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if ((UCD_CHARTYPE(c) == prop_value) == prop_fail_result) RRETURN(MATCH_NOMATCH); } break; case PT_SC: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if ((UCD_SCRIPT(c) == prop_value) == prop_fail_result) RRETURN(MATCH_NOMATCH); } break; case PT_ALNUM: for (i = 1; i <= min; i++) { int category; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); category = UCD_CATEGORY(c); if ((category == ucp_L || category == ucp_N) == prop_fail_result) RRETURN(MATCH_NOMATCH); } break; case PT_SPACE: /* Perl space */ for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if ((UCD_CATEGORY(c) == ucp_Z || c == CHAR_HT || c == CHAR_NL || c == CHAR_FF || c == CHAR_CR) == prop_fail_result) RRETURN(MATCH_NOMATCH); } break; case PT_PXSPACE: /* POSIX space */ for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if ((UCD_CATEGORY(c) == ucp_Z || c == CHAR_HT || c == CHAR_NL || c == CHAR_VT || c == CHAR_FF || c == CHAR_CR) == prop_fail_result) RRETURN(MATCH_NOMATCH); } break; case PT_WORD: for (i = 1; i <= min; i++) { int category; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); category = UCD_CATEGORY(c); if ((category == ucp_L || category == ucp_N || c == CHAR_UNDERSCORE) == prop_fail_result) RRETURN(MATCH_NOMATCH); } break; case PT_CLIST: for (i = 1; i <= min; i++) { const pcre_uint32 *cp; if (eptr >= md->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 >= md->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(PCRE_ERROR_INTERNAL); } } /* Match extended Unicode sequences. We will get here only if the support is in the binary; otherwise a compile-time error occurs. */ else if (ctype == OP_EXTUNI) { for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } else { int lgb, rgb; GETCHARINCTEST(c, eptr); lgb = UCD_GRAPHBREAK(c); while (eptr < md->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_UCP */ /* Handle all other cases when the coding is UTF-8 */ #ifdef SUPPORT_UTF if (utf) switch(ctype) { case OP_ANY: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } if (IS_NEWLINE(eptr)) RRETURN(MATCH_NOMATCH); if (md->partial != 0 && eptr + 1 >= md->end_subject && NLBLOCK->nltype == NLTYPE_FIXED && NLBLOCK->nllen == 2 && RAWUCHAR(eptr) == NLBLOCK->nl[0]) { md->hitend = TRUE; if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL); } eptr++; ACROSSCHAR(eptr < md->end_subject, *eptr, eptr++); } break; case OP_ALLANY: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } eptr++; ACROSSCHAR(eptr < md->end_subject, *eptr, eptr++); } break; case OP_ANYBYTE: if (eptr > md->end_subject - min) RRETURN(MATCH_NOMATCH); eptr += min; break; case OP_ANYNL: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINC(c, eptr); switch(c) { default: RRETURN(MATCH_NOMATCH); case CHAR_CR: if (eptr < md->end_subject && RAWUCHAR(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 (md->bsr_anycrlf) RRETURN(MATCH_NOMATCH); break; } } break; case OP_NOT_HSPACE: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINC(c, eptr); switch(c) { HSPACE_CASES: RRETURN(MATCH_NOMATCH); /* Byte and multibyte cases */ default: break; } } break; case OP_HSPACE: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINC(c, eptr); switch(c) { HSPACE_CASES: break; /* Byte and multibyte cases */ default: RRETURN(MATCH_NOMATCH); } } break; case OP_NOT_VSPACE: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINC(c, eptr); switch(c) { VSPACE_CASES: RRETURN(MATCH_NOMATCH); default: break; } } break; case OP_VSPACE: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINC(c, eptr); switch(c) { VSPACE_CASES: break; default: RRETURN(MATCH_NOMATCH); } } break; case OP_NOT_DIGIT: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINC(c, eptr); if (c < 128 && (md->ctypes[c] & ctype_digit) != 0) RRETURN(MATCH_NOMATCH); } break; case OP_DIGIT: for (i = 1; i <= min; i++) { pcre_uint32 cc; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } cc = RAWUCHAR(eptr); if (cc >= 128 || (md->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++) { pcre_uint32 cc; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } cc = RAWUCHAR(eptr); if (cc < 128 && (md->ctypes[cc] & ctype_space) != 0) RRETURN(MATCH_NOMATCH); eptr++; ACROSSCHAR(eptr < md->end_subject, *eptr, eptr++); } break; case OP_WHITESPACE: for (i = 1; i <= min; i++) { pcre_uint32 cc; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } cc = RAWUCHAR(eptr); if (cc >= 128 || (md->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++) { pcre_uint32 cc; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } cc = RAWUCHAR(eptr); if (cc < 128 && (md->ctypes[cc] & ctype_word) != 0) RRETURN(MATCH_NOMATCH); eptr++; ACROSSCHAR(eptr < md->end_subject, *eptr, eptr++); } break; case OP_WORDCHAR: for (i = 1; i <= min; i++) { pcre_uint32 cc; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } cc = RAWUCHAR(eptr); if (cc >= 128 || (md->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(PCRE_ERROR_INTERNAL); } /* End switch(ctype) */ else #endif /* SUPPORT_UTF */ /* Code for the non-UTF-8 case for minimum matching of operators other than OP_PROP and OP_NOTPROP. */ switch(ctype) { case OP_ANY: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } if (IS_NEWLINE(eptr)) RRETURN(MATCH_NOMATCH); if (md->partial != 0 && eptr + 1 >= md->end_subject && NLBLOCK->nltype == NLTYPE_FIXED && NLBLOCK->nllen == 2 && *eptr == NLBLOCK->nl[0]) { md->hitend = TRUE; if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL); } eptr++; } break; case OP_ALLANY: if (eptr > md->end_subject - min) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } eptr += min; break; case OP_ANYBYTE: if (eptr > md->end_subject - min) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } eptr += min; break; case OP_ANYNL: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } switch(*eptr++) { default: RRETURN(MATCH_NOMATCH); case CHAR_CR: if (eptr < md->end_subject && *eptr == CHAR_LF) eptr++; break; case CHAR_LF: break; case CHAR_VT: case CHAR_FF: case CHAR_NEL: #if defined COMPILE_PCRE16 || defined COMPILE_PCRE32 case 0x2028: case 0x2029: #endif if (md->bsr_anycrlf) RRETURN(MATCH_NOMATCH); break; } } break; case OP_NOT_HSPACE: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } switch(*eptr++) { default: break; HSPACE_BYTE_CASES: #if defined COMPILE_PCRE16 || defined COMPILE_PCRE32 HSPACE_MULTIBYTE_CASES: #endif RRETURN(MATCH_NOMATCH); } } break; case OP_HSPACE: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } switch(*eptr++) { default: RRETURN(MATCH_NOMATCH); HSPACE_BYTE_CASES: #if defined COMPILE_PCRE16 || defined COMPILE_PCRE32 HSPACE_MULTIBYTE_CASES: #endif break; } } break; case OP_NOT_VSPACE: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } switch(*eptr++) { VSPACE_BYTE_CASES: #if defined COMPILE_PCRE16 || defined COMPILE_PCRE32 VSPACE_MULTIBYTE_CASES: #endif RRETURN(MATCH_NOMATCH); default: break; } } break; case OP_VSPACE: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } switch(*eptr++) { default: RRETURN(MATCH_NOMATCH); VSPACE_BYTE_CASES: #if defined COMPILE_PCRE16 || defined COMPILE_PCRE32 VSPACE_MULTIBYTE_CASES: #endif break; } } break; case OP_NOT_DIGIT: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } if (MAX_255(*eptr) && (md->ctypes[*eptr] & ctype_digit) != 0) RRETURN(MATCH_NOMATCH); eptr++; } break; case OP_DIGIT: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } if (!MAX_255(*eptr) || (md->ctypes[*eptr] & ctype_digit) == 0) RRETURN(MATCH_NOMATCH); eptr++; } break; case OP_NOT_WHITESPACE: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } if (MAX_255(*eptr) && (md->ctypes[*eptr] & ctype_space) != 0) RRETURN(MATCH_NOMATCH); eptr++; } break; case OP_WHITESPACE: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } if (!MAX_255(*eptr) || (md->ctypes[*eptr] & ctype_space) == 0) RRETURN(MATCH_NOMATCH); eptr++; } break; case OP_NOT_WORDCHAR: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } if (MAX_255(*eptr) && (md->ctypes[*eptr] & ctype_word) != 0) RRETURN(MATCH_NOMATCH); eptr++; } break; case OP_WORDCHAR: for (i = 1; i <= min; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } if (!MAX_255(*eptr) || (md->ctypes[*eptr] & ctype_word) == 0) RRETURN(MATCH_NOMATCH); eptr++; } break; default: RRETURN(PCRE_ERROR_INTERNAL); } } /* If min = max, continue at the same level without recursing */ if (min == max) continue; /* If minimizing, we have to test the rest of the pattern before each subsequent match. Again, separate the UTF-8 case for speed, and also separate the UCP cases. */ if (minimize) { #ifdef SUPPORT_UCP if (prop_type >= 0) { switch(prop_type) { case PT_ANY: for (fi = min;; fi++) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM36); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if (prop_fail_result) RRETURN(MATCH_NOMATCH); } /* Control never gets here */ case PT_LAMP: for (fi = min;; fi++) { int chartype; RMATCH(eptr, ecode, offset_top, md, eptrb, RM37); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); chartype = UCD_CHARTYPE(c); if ((chartype == ucp_Lu || chartype == ucp_Ll || chartype == ucp_Lt) == prop_fail_result) RRETURN(MATCH_NOMATCH); } /* Control never gets here */ case PT_GC: for (fi = min;; fi++) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM38); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if ((UCD_CATEGORY(c) == prop_value) == prop_fail_result) RRETURN(MATCH_NOMATCH); } /* Control never gets here */ case PT_PC: for (fi = min;; fi++) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM39); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if ((UCD_CHARTYPE(c) == prop_value) == prop_fail_result) RRETURN(MATCH_NOMATCH); } /* Control never gets here */ case PT_SC: for (fi = min;; fi++) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM40); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if ((UCD_SCRIPT(c) == prop_value) == prop_fail_result) RRETURN(MATCH_NOMATCH); } /* Control never gets here */ case PT_ALNUM: for (fi = min;; fi++) { int category; RMATCH(eptr, ecode, offset_top, md, eptrb, RM59); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); category = UCD_CATEGORY(c); if ((category == ucp_L || category == ucp_N) == prop_fail_result) RRETURN(MATCH_NOMATCH); } /* Control never gets here */ case PT_SPACE: /* Perl space */ for (fi = min;; fi++) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM60); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if ((UCD_CATEGORY(c) == ucp_Z || c == CHAR_HT || c == CHAR_NL || c == CHAR_FF || c == CHAR_CR) == prop_fail_result) RRETURN(MATCH_NOMATCH); } /* Control never gets here */ case PT_PXSPACE: /* POSIX space */ for (fi = min;; fi++) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM61); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if ((UCD_CATEGORY(c) == ucp_Z || c == CHAR_HT || c == CHAR_NL || c == CHAR_VT || c == CHAR_FF || c == CHAR_CR) == prop_fail_result) RRETURN(MATCH_NOMATCH); } /* Control never gets here */ case PT_WORD: for (fi = min;; fi++) { int category; RMATCH(eptr, ecode, offset_top, md, eptrb, RM62); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); category = UCD_CATEGORY(c); if ((category == ucp_L || category == ucp_N || c == CHAR_UNDERSCORE) == prop_fail_result) RRETURN(MATCH_NOMATCH); } /* Control never gets here */ case PT_CLIST: for (fi = min;; fi++) { const pcre_uint32 *cp; RMATCH(eptr, ecode, offset_top, md, eptrb, RM67); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); 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, md, eptrb, RM68); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } GETCHARINCTEST(c, eptr); if ((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(PCRE_ERROR_INTERNAL); } } /* Match extended Unicode sequences. We will get here only if the support is in the binary; otherwise a compile-time error occurs. */ else if (ctype == OP_EXTUNI) { for (fi = min;; fi++) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM41); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } else { int lgb, rgb; GETCHARINCTEST(c, eptr); lgb = UCD_GRAPHBREAK(c); while (eptr < md->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_UCP */ #ifdef SUPPORT_UTF if (utf) { for (fi = min;; fi++) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM42); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } if (ctype == OP_ANY && IS_NEWLINE(eptr)) RRETURN(MATCH_NOMATCH); GETCHARINC(c, eptr); switch(ctype) { case OP_ANY: /* This is the non-NL case */ if (md->partial != 0 && /* Take care with CRLF partial */ eptr >= md->end_subject && NLBLOCK->nltype == NLTYPE_FIXED && NLBLOCK->nllen == 2 && c == NLBLOCK->nl[0]) { md->hitend = TRUE; if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL); } break; case OP_ALLANY: case OP_ANYBYTE: break; case OP_ANYNL: switch(c) { default: RRETURN(MATCH_NOMATCH); case CHAR_CR: if (eptr < md->end_subject && RAWUCHAR(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 (md->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 && (md->ctypes[c] & ctype_digit) != 0) RRETURN(MATCH_NOMATCH); break; case OP_DIGIT: if (c >= 256 || (md->ctypes[c] & ctype_digit) == 0) RRETURN(MATCH_NOMATCH); break; case OP_NOT_WHITESPACE: if (c < 256 && (md->ctypes[c] & ctype_space) != 0) RRETURN(MATCH_NOMATCH); break; case OP_WHITESPACE: if (c >= 256 || (md->ctypes[c] & ctype_space) == 0) RRETURN(MATCH_NOMATCH); break; case OP_NOT_WORDCHAR: if (c < 256 && (md->ctypes[c] & ctype_word) != 0) RRETURN(MATCH_NOMATCH); break; case OP_WORDCHAR: if (c >= 256 || (md->ctypes[c] & ctype_word) == 0) RRETURN(MATCH_NOMATCH); break; default: RRETURN(PCRE_ERROR_INTERNAL); } } } else #endif /* Not UTF mode */ { for (fi = min;; fi++) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM43); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (fi >= max) RRETURN(MATCH_NOMATCH); if (eptr >= md->end_subject) { SCHECK_PARTIAL(); RRETURN(MATCH_NOMATCH); } if (ctype == OP_ANY && IS_NEWLINE(eptr)) RRETURN(MATCH_NOMATCH); c = *eptr++; switch(ctype) { case OP_ANY: /* This is the non-NL case */ if (md->partial != 0 && /* Take care with CRLF partial */ eptr >= md->end_subject && NLBLOCK->nltype == NLTYPE_FIXED && NLBLOCK->nllen == 2 && c == NLBLOCK->nl[0]) { md->hitend = TRUE; if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL); } break; case OP_ALLANY: case OP_ANYBYTE: break; case OP_ANYNL: switch(c) { default: RRETURN(MATCH_NOMATCH); case CHAR_CR: if (eptr < md->end_subject && *eptr == CHAR_LF) eptr++; break; case CHAR_LF: break; case CHAR_VT: case CHAR_FF: case CHAR_NEL: #if defined COMPILE_PCRE16 || defined COMPILE_PCRE32 case 0x2028: case 0x2029: #endif if (md->bsr_anycrlf) RRETURN(MATCH_NOMATCH); break; } break; case OP_NOT_HSPACE: switch(c) { default: break; HSPACE_BYTE_CASES: #if defined COMPILE_PCRE16 || defined COMPILE_PCRE32 HSPACE_MULTIBYTE_CASES: #endif RRETURN(MATCH_NOMATCH); } break; case OP_HSPACE: switch(c) { default: RRETURN(MATCH_NOMATCH); HSPACE_BYTE_CASES: #if defined COMPILE_PCRE16 || defined COMPILE_PCRE32 HSPACE_MULTIBYTE_CASES: #endif break; } break; case OP_NOT_VSPACE: switch(c) { default: break; VSPACE_BYTE_CASES: #if defined COMPILE_PCRE16 || defined COMPILE_PCRE32 VSPACE_MULTIBYTE_CASES: #endif RRETURN(MATCH_NOMATCH); } break; case OP_VSPACE: switch(c) { default: RRETURN(MATCH_NOMATCH); VSPACE_BYTE_CASES: #if defined COMPILE_PCRE16 || defined COMPILE_PCRE32 VSPACE_MULTIBYTE_CASES: #endif break; } break; case OP_NOT_DIGIT: if (MAX_255(c) && (md->ctypes[c] & ctype_digit) != 0) RRETURN(MATCH_NOMATCH); break; case OP_DIGIT: if (!MAX_255(c) || (md->ctypes[c] & ctype_digit) == 0) RRETURN(MATCH_NOMATCH); break; case OP_NOT_WHITESPACE: if (MAX_255(c) && (md->ctypes[c] & ctype_space) != 0) RRETURN(MATCH_NOMATCH); break; case OP_WHITESPACE: if (!MAX_255(c) || (md->ctypes[c] & ctype_space) == 0) RRETURN(MATCH_NOMATCH); break; case OP_NOT_WORDCHAR: if (MAX_255(c) && (md->ctypes[c] & ctype_word) != 0) RRETURN(MATCH_NOMATCH); break; case OP_WORDCHAR: if (!MAX_255(c) || (md->ctypes[c] & ctype_word) == 0) RRETURN(MATCH_NOMATCH); break; default: RRETURN(PCRE_ERROR_INTERNAL); } } } /* Control never gets here */ } /* If maximizing, it is worth using inline code for speed, doing the type test once at the start (i.e. keep it out of the loop). Again, keep the UTF-8 and UCP stuff separate. */ else { pp = eptr; /* Remember where we started */ #ifdef SUPPORT_UCP if (prop_type >= 0) { switch(prop_type) { case PT_ANY: for (i = min; i < max; i++) { int len = 1; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } GETCHARLENTEST(c, eptr, len); if (prop_fail_result) break; eptr+= len; } break; case PT_LAMP: for (i = min; i < max; i++) { int chartype; int len = 1; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } GETCHARLENTEST(c, eptr, len); chartype = UCD_CHARTYPE(c); if ((chartype == ucp_Lu || chartype == ucp_Ll || chartype == ucp_Lt) == prop_fail_result) break; eptr+= len; } break; case PT_GC: for (i = min; i < max; i++) { int len = 1; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } GETCHARLENTEST(c, eptr, len); if ((UCD_CATEGORY(c) == prop_value) == prop_fail_result) break; eptr+= len; } break; case PT_PC: for (i = min; i < max; i++) { int len = 1; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } GETCHARLENTEST(c, eptr, len); if ((UCD_CHARTYPE(c) == prop_value) == prop_fail_result) break; eptr+= len; } break; case PT_SC: for (i = min; i < max; i++) { int len = 1; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } GETCHARLENTEST(c, eptr, len); if ((UCD_SCRIPT(c) == prop_value) == prop_fail_result) break; eptr+= len; } break; case PT_ALNUM: for (i = min; i < max; i++) { int category; int len = 1; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } GETCHARLENTEST(c, eptr, len); category = UCD_CATEGORY(c); if ((category == ucp_L || category == ucp_N) == prop_fail_result) break; eptr+= len; } break; case PT_SPACE: /* Perl space */ for (i = min; i < max; i++) { int len = 1; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } GETCHARLENTEST(c, eptr, len); if ((UCD_CATEGORY(c) == ucp_Z || c == CHAR_HT || c == CHAR_NL || c == CHAR_FF || c == CHAR_CR) == prop_fail_result) break; eptr+= len; } break; case PT_PXSPACE: /* POSIX space */ for (i = min; i < max; i++) { int len = 1; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } GETCHARLENTEST(c, eptr, len); if ((UCD_CATEGORY(c) == ucp_Z || c == CHAR_HT || c == CHAR_NL || c == CHAR_VT || c == CHAR_FF || c == CHAR_CR) == prop_fail_result) break; eptr+= len; } break; case PT_WORD: for (i = min; i < max; i++) { int category; int len = 1; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } GETCHARLENTEST(c, eptr, len); category = UCD_CATEGORY(c); if ((category == ucp_L || category == ucp_N || c == CHAR_UNDERSCORE) == prop_fail_result) break; eptr+= len; } break; case PT_CLIST: for (i = min; i < max; i++) { const pcre_uint32 *cp; int len = 1; if (eptr >= md->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 >= md->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(PCRE_ERROR_INTERNAL); } /* eptr is now past the end of the maximum run */ if (possessive) continue; for(;;) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM44); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (eptr-- == pp) break; /* Stop if tried at original pos */ if (utf) BACKCHAR(eptr); } } /* Match extended Unicode sequences. We will get here only if the support is in the binary; otherwise a compile-time error occurs. */ else if (ctype == OP_EXTUNI) { for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } else { int lgb, rgb; GETCHARINCTEST(c, eptr); lgb = UCD_GRAPHBREAK(c); while (eptr < md->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; for(;;) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM45); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (eptr-- == pp) break; /* Stop if tried at original pos */ for (;;) /* Move back over one extended */ { if (!utf) c = *eptr; else { BACKCHAR(eptr); GETCHAR(c, eptr); } if (UCD_CATEGORY(c) != ucp_M) break; eptr--; } } } else #endif /* SUPPORT_UCP */ #ifdef SUPPORT_UTF if (utf) { switch(ctype) { case OP_ANY: if (max < INT_MAX) { for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } if (IS_NEWLINE(eptr)) break; if (md->partial != 0 && /* Take care with CRLF partial */ eptr + 1 >= md->end_subject && NLBLOCK->nltype == NLTYPE_FIXED && NLBLOCK->nllen == 2 && RAWUCHAR(eptr) == NLBLOCK->nl[0]) { md->hitend = TRUE; if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL); } eptr++; ACROSSCHAR(eptr < md->end_subject, *eptr, eptr++); } } /* Handle unlimited UTF-8 repeat */ else { for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } if (IS_NEWLINE(eptr)) break; if (md->partial != 0 && /* Take care with CRLF partial */ eptr + 1 >= md->end_subject && NLBLOCK->nltype == NLTYPE_FIXED && NLBLOCK->nllen == 2 && RAWUCHAR(eptr) == NLBLOCK->nl[0]) { md->hitend = TRUE; if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL); } eptr++; ACROSSCHAR(eptr < md->end_subject, *eptr, eptr++); } } break; case OP_ALLANY: if (max < INT_MAX) { for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } eptr++; ACROSSCHAR(eptr < md->end_subject, *eptr, eptr++); } } else { eptr = md->end_subject; /* Unlimited UTF-8 repeat */ SCHECK_PARTIAL(); } break; /* The byte case is the same as non-UTF8 */ case OP_ANYBYTE: c = max - min; if (c > (unsigned int)(md->end_subject - eptr)) { eptr = md->end_subject; SCHECK_PARTIAL(); } else eptr += c; break; case OP_ANYNL: for (i = min; i < max; i++) { int len = 1; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } GETCHARLEN(c, eptr, len); if (c == CHAR_CR) { if (++eptr >= md->end_subject) break; if (RAWUCHAR(eptr) == CHAR_LF) eptr++; } else { if (c != CHAR_LF && (md->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 >= md->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 >= md->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 >= md->end_subject) { SCHECK_PARTIAL(); break; } GETCHARLEN(c, eptr, len); if (c < 256 && (md->ctypes[c] & ctype_digit) != 0) break; eptr+= len; } break; case OP_DIGIT: for (i = min; i < max; i++) { int len = 1; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } GETCHARLEN(c, eptr, len); if (c >= 256 ||(md->ctypes[c] & ctype_digit) == 0) break; eptr+= len; } break; case OP_NOT_WHITESPACE: for (i = min; i < max; i++) { int len = 1; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } GETCHARLEN(c, eptr, len); if (c < 256 && (md->ctypes[c] & ctype_space) != 0) break; eptr+= len; } break; case OP_WHITESPACE: for (i = min; i < max; i++) { int len = 1; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } GETCHARLEN(c, eptr, len); if (c >= 256 ||(md->ctypes[c] & ctype_space) == 0) break; eptr+= len; } break; case OP_NOT_WORDCHAR: for (i = min; i < max; i++) { int len = 1; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } GETCHARLEN(c, eptr, len); if (c < 256 && (md->ctypes[c] & ctype_word) != 0) break; eptr+= len; } break; case OP_WORDCHAR: for (i = min; i < max; i++) { int len = 1; if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } GETCHARLEN(c, eptr, len); if (c >= 256 || (md->ctypes[c] & ctype_word) == 0) break; eptr+= len; } break; default: RRETURN(PCRE_ERROR_INTERNAL); } /* eptr is now past the end of the maximum run. If possessive, we are done (no backing up). Otherwise, match at this position; anything other than no match is immediately returned. For nomatch, back up one character, unless we are matching \R and the last thing matched was \r\n, in which case, back up two bytes. */ if (possessive) continue; for(;;) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM46); if (rrc != MATCH_NOMATCH) RRETURN(rrc); if (eptr-- == pp) break; /* Stop if tried at original pos */ BACKCHAR(eptr); if (ctype == OP_ANYNL && eptr > pp && RAWUCHAR(eptr) == CHAR_NL && RAWUCHAR(eptr - 1) == CHAR_CR) eptr--; } } else #endif /* SUPPORT_UTF */ /* Not UTF mode */ { switch(ctype) { case OP_ANY: for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } if (IS_NEWLINE(eptr)) break; if (md->partial != 0 && /* Take care with CRLF partial */ eptr + 1 >= md->end_subject && NLBLOCK->nltype == NLTYPE_FIXED && NLBLOCK->nllen == 2 && *eptr == NLBLOCK->nl[0]) { md->hitend = TRUE; if (md->partial > 1) RRETURN(PCRE_ERROR_PARTIAL); } eptr++; } break; case OP_ALLANY: case OP_ANYBYTE: c = max - min; if (c > (unsigned int)(md->end_subject - eptr)) { eptr = md->end_subject; SCHECK_PARTIAL(); } else eptr += c; break; case OP_ANYNL: for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } c = *eptr; if (c == CHAR_CR) { if (++eptr >= md->end_subject) break; if (*eptr == CHAR_LF) eptr++; } else { if (c != CHAR_LF && (md->bsr_anycrlf || (c != CHAR_VT && c != CHAR_FF && c != CHAR_NEL #if defined COMPILE_PCRE16 || defined COMPILE_PCRE32 && c != 0x2028 && c != 0x2029 #endif ))) break; eptr++; } } break; case OP_NOT_HSPACE: for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } switch(*eptr) { default: eptr++; break; HSPACE_BYTE_CASES: #if defined COMPILE_PCRE16 || defined COMPILE_PCRE32 HSPACE_MULTIBYTE_CASES: #endif goto ENDLOOP00; } } ENDLOOP00: break; case OP_HSPACE: for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } switch(*eptr) { default: goto ENDLOOP01; HSPACE_BYTE_CASES: #if defined COMPILE_PCRE16 || defined COMPILE_PCRE32 HSPACE_MULTIBYTE_CASES: #endif eptr++; break; } } ENDLOOP01: break; case OP_NOT_VSPACE: for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } switch(*eptr) { default: eptr++; break; VSPACE_BYTE_CASES: #if defined COMPILE_PCRE16 || defined COMPILE_PCRE32 VSPACE_MULTIBYTE_CASES: #endif goto ENDLOOP02; } } ENDLOOP02: break; case OP_VSPACE: for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } switch(*eptr) { default: goto ENDLOOP03; VSPACE_BYTE_CASES: #if defined COMPILE_PCRE16 || defined COMPILE_PCRE32 VSPACE_MULTIBYTE_CASES: #endif eptr++; break; } } ENDLOOP03: break; case OP_NOT_DIGIT: for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } if (MAX_255(*eptr) && (md->ctypes[*eptr] & ctype_digit) != 0) break; eptr++; } break; case OP_DIGIT: for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } if (!MAX_255(*eptr) || (md->ctypes[*eptr] & ctype_digit) == 0) break; eptr++; } break; case OP_NOT_WHITESPACE: for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } if (MAX_255(*eptr) && (md->ctypes[*eptr] & ctype_space) != 0) break; eptr++; } break; case OP_WHITESPACE: for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } if (!MAX_255(*eptr) || (md->ctypes[*eptr] & ctype_space) == 0) break; eptr++; } break; case OP_NOT_WORDCHAR: for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } if (MAX_255(*eptr) && (md->ctypes[*eptr] & ctype_word) != 0) break; eptr++; } break; case OP_WORDCHAR: for (i = min; i < max; i++) { if (eptr >= md->end_subject) { SCHECK_PARTIAL(); break; } if (!MAX_255(*eptr) || (md->ctypes[*eptr] & ctype_word) == 0) break; eptr++; } break; default: RRETURN(PCRE_ERROR_INTERNAL); } /* eptr is now past the end of the maximum run. If possessive, we are done (no backing up). Otherwise, match at this position; anything other than no match is immediately returned. For nomatch, back up one character (byte), unless we are matching \R and the last thing matched was \r\n, in which case, back up two bytes. */ if (possessive) continue; while (eptr >= pp) { RMATCH(eptr, ecode, offset_top, md, eptrb, RM47); if (rrc != MATCH_NOMATCH) RRETURN(rrc); eptr--; if (ctype == OP_ANYNL && eptr > pp && *eptr == CHAR_LF && eptr[-1] == CHAR_CR) eptr--; } } /* Get here if we can't make it match with any permitted repetitions */ RRETURN(MATCH_NOMATCH); } /* Control never gets here */ /* There's been some horrible disaster. Arrival here can only mean there is something seriously wrong in the code above or the OP_xxx definitions. */ default: DPRINTF(("Unknown opcode %d\n", *ecode)); RRETURN(PCRE_ERROR_UNKNOWN_OPCODE); } /* Do not stick any code in here without much thought; it is assumed that "continue" in the code above comes out to here to repeat the main loop. */ } /* End of main loop */ /* Control never reaches here */ /* When compiling to use the heap rather than the stack for recursive calls to match(), the RRETURN() macro jumps here. The number that is saved in frame->Xwhere indicates which label we actually want to return to. */ #ifdef NO_RECURSE #define LBL(val) case val: goto L_RM##val; HEAP_RETURN: switch (frame->Xwhere) { LBL( 1) LBL( 2) LBL( 3) LBL( 4) LBL( 5) LBL( 6) LBL( 7) LBL( 8) LBL( 9) LBL(10) LBL(11) LBL(12) LBL(13) LBL(14) LBL(15) LBL(17) LBL(19) LBL(24) LBL(25) LBL(26) LBL(27) LBL(29) LBL(31) LBL(33) LBL(35) LBL(43) LBL(47) LBL(48) LBL(49) LBL(50) LBL(51) LBL(52) LBL(53) LBL(54) LBL(55) LBL(56) LBL(57) LBL(58) LBL(63) LBL(64) LBL(65) LBL(66) #if defined SUPPORT_UTF || !defined COMPILE_PCRE8 LBL(21) #endif #ifdef SUPPORT_UTF LBL(16) LBL(18) LBL(20) LBL(22) LBL(23) LBL(28) LBL(30) LBL(32) LBL(34) LBL(42) LBL(46) #ifdef SUPPORT_UCP LBL(36) LBL(37) LBL(38) LBL(39) LBL(40) LBL(41) LBL(44) LBL(45) LBL(59) LBL(60) LBL(61) LBL(62) LBL(67) LBL(68) #endif /* SUPPORT_UCP */ #endif /* SUPPORT_UTF */ default: DPRINTF(("jump error in pcre match: label %d non-existent\n", frame->Xwhere)); return PCRE_ERROR_INTERNAL; } #undef LBL #endif /* NO_RECURSE */ } /*************************************************************************** **************************************************************************** RECURSION IN THE match() FUNCTION Undefine all the macros that were defined above to handle this. */ #ifdef NO_RECURSE #undef eptr #undef ecode #undef mstart #undef offset_top #undef eptrb #undef flags #undef callpat #undef charptr #undef data #undef next #undef pp #undef prev #undef saved_eptr #undef new_recursive #undef cur_is_word #undef condition #undef prev_is_word #undef ctype #undef length #undef max #undef min #undef number #undef offset #undef op #undef save_capture_last #undef save_offset1 #undef save_offset2 #undef save_offset3 #undef stacksave #undef newptrb #endif /* These two are defined as macros in both cases */ #undef fc #undef fi /*************************************************************************** ***************************************************************************/ #ifdef NO_RECURSE /************************************************* * Release allocated heap frames * *************************************************/ /* This function releases all the allocated frames. The base frame is on the machine stack, and so must not be freed. Argument: the address of the base frame Returns: nothing */ static void release_match_heapframes (heapframe *frame_base) { heapframe *nextframe = frame_base->Xnextframe; while (nextframe != NULL) { heapframe *oldframe = nextframe; nextframe = nextframe->Xnextframe; (PUBL(stack_free))(oldframe); } } #endif /************************************************* * Execute a Regular Expression * *************************************************/ /* This function applies a compiled re to a subject string and picks out portions of the string if it matches. Two elements in the vector are set for each substring: the offsets to the start and end of the substring. Arguments: argument_re points to the compiled expression extra_data points to extra data or is NULL subject points to the subject string length length of subject string (may contain binary zeros) start_offset where to start in the subject string options option bits offsets points to a vector of ints to be filled in with offsets offsetcount the number of elements in the vector Returns: > 0 => success; value is the number of elements filled in = 0 => success, but offsets is not big enough -1 => failed to match < -1 => some kind of unexpected problem */ #if defined COMPILE_PCRE8 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION pcre_exec(const pcre *argument_re, const pcre_extra *extra_data, PCRE_SPTR subject, int length, int start_offset, int options, int *offsets, int offsetcount) #elif defined COMPILE_PCRE16 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION pcre16_exec(const pcre16 *argument_re, const pcre16_extra *extra_data, PCRE_SPTR16 subject, int length, int start_offset, int options, int *offsets, int offsetcount) #elif defined COMPILE_PCRE32 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION pcre32_exec(const pcre32 *argument_re, const pcre32_extra *extra_data, PCRE_SPTR32 subject, int length, int start_offset, int options, int *offsets, int offsetcount) #endif { int rc, ocount, arg_offset_max; int newline; BOOL using_temporary_offsets = FALSE; BOOL anchored; BOOL startline; BOOL firstline; BOOL utf; BOOL has_first_char = FALSE; BOOL has_req_char = FALSE; pcre_uchar first_char = 0; pcre_uchar first_char2 = 0; pcre_uchar req_char = 0; pcre_uchar req_char2 = 0; match_data match_block; match_data *md = &match_block; const pcre_uint8 *tables; const pcre_uint8 *start_bits = NULL; PCRE_PUCHAR start_match = (PCRE_PUCHAR)subject + start_offset; PCRE_PUCHAR end_subject; PCRE_PUCHAR start_partial = NULL; PCRE_PUCHAR match_partial; PCRE_PUCHAR req_char_ptr = start_match - 1; const pcre_study_data *study; const REAL_PCRE *re = (const REAL_PCRE *)argument_re; #ifdef NO_RECURSE heapframe frame_zero; frame_zero.Xprevframe = NULL; /* Marks the top level */ frame_zero.Xnextframe = NULL; /* None are allocated yet */ md->match_frames_base = &frame_zero; #endif /* Check for the special magic call that measures the size of the stack used per recursive call of match(). Without the funny casting for sizeof, a Windows compiler gave this error: "unary minus operator applied to unsigned type, result still unsigned". Hopefully the cast fixes that. */ if (re == NULL && extra_data == NULL && subject == NULL && length == -999 && start_offset == -999) #ifdef NO_RECURSE return -((int)sizeof(heapframe)); #else return match(NULL, NULL, NULL, 0, NULL, NULL, 0); #endif /* Plausibility checks */ if ((options & ~PUBLIC_EXEC_OPTIONS) != 0) return PCRE_ERROR_BADOPTION; if (re == NULL || subject == NULL || (offsets == NULL && offsetcount > 0)) return PCRE_ERROR_NULL; if (offsetcount < 0) return PCRE_ERROR_BADCOUNT; if (length < 0) return PCRE_ERROR_BADLENGTH; if (start_offset < 0 || start_offset > length) return PCRE_ERROR_BADOFFSET; /* Check that the first field in the block is the magic number. If it is not, return with PCRE_ERROR_BADMAGIC. However, if the magic number is equal to REVERSED_MAGIC_NUMBER we return with PCRE_ERROR_BADENDIANNESS, which means that the pattern is likely compiled with different endianness. */ if (re->magic_number != MAGIC_NUMBER) return re->magic_number == REVERSED_MAGIC_NUMBER? PCRE_ERROR_BADENDIANNESS:PCRE_ERROR_BADMAGIC; if ((re->flags & PCRE_MODE) == 0) return PCRE_ERROR_BADMODE; /* These two settings are used in the code for checking a UTF-8 string that follows immediately afterwards. Other values in the md block are used only during "normal" pcre_exec() processing, not when the JIT support is in use, so they are set up later. */ /* PCRE_UTF16 has the same value as PCRE_UTF8. */ utf = md->utf = (re->options & PCRE_UTF8) != 0; md->partial = ((options & PCRE_PARTIAL_HARD) != 0)? 2 : ((options & PCRE_PARTIAL_SOFT) != 0)? 1 : 0; /* Check a UTF-8 string if required. Pass back the character offset and error code for an invalid string if a results vector is available. */ #ifdef SUPPORT_UTF if (utf && (options & PCRE_NO_UTF8_CHECK) == 0) { int erroroffset; int errorcode = PRIV(valid_utf)((PCRE_PUCHAR)subject, length, &erroroffset); if (errorcode != 0) { if (offsetcount >= 2) { offsets[0] = erroroffset; offsets[1] = errorcode; } #if defined COMPILE_PCRE8 return (errorcode <= PCRE_UTF8_ERR5 && md->partial > 1)? PCRE_ERROR_SHORTUTF8 : PCRE_ERROR_BADUTF8; #elif defined COMPILE_PCRE16 return (errorcode <= PCRE_UTF16_ERR1 && md->partial > 1)? PCRE_ERROR_SHORTUTF16 : PCRE_ERROR_BADUTF16; #elif defined COMPILE_PCRE32 return PCRE_ERROR_BADUTF32; #endif } #if defined COMPILE_PCRE8 || defined COMPILE_PCRE16 /* Check that a start_offset points to the start of a UTF character. */ if (start_offset > 0 && start_offset < length && NOT_FIRSTCHAR(((PCRE_PUCHAR)subject)[start_offset])) return PCRE_ERROR_BADUTF8_OFFSET; #endif } #endif /* If the pattern was successfully studied with JIT support, run the JIT executable instead of the rest of this function. Most options must be set at compile time for the JIT code to be usable. Fallback to the normal code path if an unsupported flag is set. */ #ifdef SUPPORT_JIT if (extra_data != NULL && (extra_data->flags & (PCRE_EXTRA_EXECUTABLE_JIT | PCRE_EXTRA_TABLES)) == PCRE_EXTRA_EXECUTABLE_JIT && extra_data->executable_jit != NULL && (options & ~PUBLIC_JIT_EXEC_OPTIONS) == 0) { rc = PRIV(jit_exec)(extra_data, (const pcre_uchar *)subject, length, start_offset, options, offsets, offsetcount); /* PCRE_ERROR_NULL means that the selected normal or partial matching mode is not compiled. In this case we simply fallback to interpreter. */ if (rc != PCRE_ERROR_JIT_BADOPTION) return rc; } #endif /* Carry on with non-JIT matching. This information is for finding all the numbers associated with a given name, for condition testing. */ md->name_table = (pcre_uchar *)re + re->name_table_offset; md->name_count = re->name_count; md->name_entry_size = re->name_entry_size; /* Fish out the optional data from the extra_data structure, first setting the default values. */ study = NULL; md->match_limit = MATCH_LIMIT; md->match_limit_recursion = MATCH_LIMIT_RECURSION; md->callout_data = NULL; /* The table pointer is always in native byte order. */ tables = re->tables; if (extra_data != NULL) { register unsigned int flags = extra_data->flags; if ((flags & PCRE_EXTRA_STUDY_DATA) != 0) study = (const pcre_study_data *)extra_data->study_data; if ((flags & PCRE_EXTRA_MATCH_LIMIT) != 0) md->match_limit = extra_data->match_limit; if ((flags & PCRE_EXTRA_MATCH_LIMIT_RECURSION) != 0) md->match_limit_recursion = extra_data->match_limit_recursion; if ((flags & PCRE_EXTRA_CALLOUT_DATA) != 0) md->callout_data = extra_data->callout_data; if ((flags & PCRE_EXTRA_TABLES) != 0) tables = extra_data->tables; } /* If the exec call supplied NULL for tables, use the inbuilt ones. This is a feature that makes it possible to save compiled regex and re-use them in other programs later. */ if (tables == NULL) tables = PRIV(default_tables); /* Set up other data */ anchored = ((re->options | options) & PCRE_ANCHORED) != 0; startline = (re->flags & PCRE_STARTLINE) != 0; firstline = (re->options & PCRE_FIRSTLINE) != 0; /* The code starts after the real_pcre block and the capture name table. */ md->start_code = (const pcre_uchar *)re + re->name_table_offset + re->name_count * re->name_entry_size; md->start_subject = (PCRE_PUCHAR)subject; md->start_offset = start_offset; md->end_subject = md->start_subject + length; end_subject = md->end_subject; md->endonly = (re->options & PCRE_DOLLAR_ENDONLY) != 0; md->use_ucp = (re->options & PCRE_UCP) != 0; md->jscript_compat = (re->options & PCRE_JAVASCRIPT_COMPAT) != 0; md->ignore_skip_arg = FALSE; /* Some options are unpacked into BOOL variables in the hope that testing them will be faster than individual option bits. */ md->notbol = (options & PCRE_NOTBOL) != 0; md->noteol = (options & PCRE_NOTEOL) != 0; md->notempty = (options & PCRE_NOTEMPTY) != 0; md->notempty_atstart = (options & PCRE_NOTEMPTY_ATSTART) != 0; md->hitend = FALSE; md->mark = md->nomatch_mark = NULL; /* In case never set */ md->recursive = NULL; /* No recursion at top level */ md->hasthen = (re->flags & PCRE_HASTHEN) != 0; md->lcc = tables + lcc_offset; md->fcc = tables + fcc_offset; md->ctypes = tables + ctypes_offset; /* Handle different \R options. */ switch (options & (PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE)) { case 0: if ((re->options & (PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE)) != 0) md->bsr_anycrlf = (re->options & PCRE_BSR_ANYCRLF) != 0; else #ifdef BSR_ANYCRLF md->bsr_anycrlf = TRUE; #else md->bsr_anycrlf = FALSE; #endif break; case PCRE_BSR_ANYCRLF: md->bsr_anycrlf = TRUE; break; case PCRE_BSR_UNICODE: md->bsr_anycrlf = FALSE; break; default: return PCRE_ERROR_BADNEWLINE; } /* Handle different types of newline. The three bits give eight cases. If nothing is set at run time, whatever was used at compile time applies. */ switch ((((options & PCRE_NEWLINE_BITS) == 0)? re->options : (pcre_uint32)options) & PCRE_NEWLINE_BITS) { case 0: newline = NEWLINE; break; /* Compile-time default */ case PCRE_NEWLINE_CR: newline = CHAR_CR; break; case PCRE_NEWLINE_LF: newline = CHAR_NL; break; case PCRE_NEWLINE_CR+ PCRE_NEWLINE_LF: newline = (CHAR_CR << 8) | CHAR_NL; break; case PCRE_NEWLINE_ANY: newline = -1; break; case PCRE_NEWLINE_ANYCRLF: newline = -2; break; default: return PCRE_ERROR_BADNEWLINE; } if (newline == -2) { md->nltype = NLTYPE_ANYCRLF; } else if (newline < 0) { md->nltype = NLTYPE_ANY; } else { md->nltype = NLTYPE_FIXED; if (newline > 255) { md->nllen = 2; md->nl[0] = (newline >> 8) & 255; md->nl[1] = newline & 255; } else { md->nllen = 1; md->nl[0] = newline; } } /* Partial matching was originally supported only for a restricted set of regexes; from release 8.00 there are no restrictions, but the bits are still defined (though never set). So there's no harm in leaving this code. */ if (md->partial && (re->flags & PCRE_NOPARTIAL) != 0) return PCRE_ERROR_BADPARTIAL; /* If the expression has got more back references than the offsets supplied can hold, we get a temporary chunk of working store to use during the matching. Otherwise, we can use the vector supplied, rounding down its size to a multiple of 3. */ ocount = offsetcount - (offsetcount % 3); arg_offset_max = (2*ocount)/3; if (re->top_backref > 0 && re->top_backref >= ocount/3) { ocount = re->top_backref * 3 + 3; md->offset_vector = (int *)(PUBL(malloc))(ocount * sizeof(int)); if (md->offset_vector == NULL) return PCRE_ERROR_NOMEMORY; using_temporary_offsets = TRUE; DPRINTF(("Got memory to hold back references\n")); } else md->offset_vector = offsets; md->offset_end = ocount; md->offset_max = (2*ocount)/3; md->capture_last = 0; /* Reset the working variable associated with each extraction. These should never be used unless previously set, but they get saved and restored, and so we initialize them to avoid reading uninitialized locations. Also, unset the offsets for the matched string. This is really just for tidiness with callouts, in case they inspect these fields. */ if (md->offset_vector != NULL) { register int *iptr = md->offset_vector + ocount; register int *iend = iptr - re->top_bracket; if (iend < md->offset_vector + 2) iend = md->offset_vector + 2; while (--iptr >= iend) *iptr = -1; md->offset_vector[0] = md->offset_vector[1] = -1; } /* Set up the first character to match, if available. The first_char value is never set for an anchored regular expression, but the anchoring may be forced at run time, so we have to test for anchoring. The first char may be unset for an unanchored pattern, of course. If there's no first char and the pattern was studied, there may be a bitmap of possible first characters. */ if (!anchored) { if ((re->flags & PCRE_FIRSTSET) != 0) { has_first_char = TRUE; first_char = first_char2 = (pcre_uchar)(re->first_char); if ((re->flags & PCRE_FCH_CASELESS) != 0) { first_char2 = TABLE_GET(first_char, md->fcc, first_char); #if defined SUPPORT_UCP && !(defined COMPILE_PCRE8) if (utf && first_char > 127) first_char2 = UCD_OTHERCASE(first_char); #endif } } else if (!startline && study != NULL && (study->flags & PCRE_STUDY_MAPPED) != 0) start_bits = study->start_bits; } /* For anchored or unanchored matches, there may be a "last known required character" set. */ if ((re->flags & PCRE_REQCHSET) != 0) { has_req_char = TRUE; req_char = req_char2 = (pcre_uchar)(re->req_char); if ((re->flags & PCRE_RCH_CASELESS) != 0) { req_char2 = TABLE_GET(req_char, md->fcc, req_char); #if defined SUPPORT_UCP && !(defined COMPILE_PCRE8) if (utf && req_char > 127) req_char2 = UCD_OTHERCASE(req_char); #endif } } /* ==========================================================================*/ /* Loop for handling unanchored repeated matching attempts; for anchored regexs the loop runs just once. */ for(;;) { PCRE_PUCHAR save_end_subject = end_subject; PCRE_PUCHAR new_start_match; /* If firstline is TRUE, the start of the match is constrained to the first line of a multiline string. That is, the match must be before or at the first newline. Implement this by temporarily adjusting end_subject so that we stop scanning at a newline. If the match fails at the newline, later code breaks this loop. */ if (firstline) { PCRE_PUCHAR t = start_match; #ifdef SUPPORT_UTF if (utf) { while (t < md->end_subject && !IS_NEWLINE(t)) { t++; ACROSSCHAR(t < end_subject, *t, t++); } } else #endif while (t < md->end_subject && !IS_NEWLINE(t)) t++; end_subject = t; } /* There are some optimizations that avoid running the match if a known starting point is not found, or if a known later character is not present. However, there is an option that disables these, for testing and for ensuring that all callouts do actually occur. The option can be set in the regex by (*NO_START_OPT) or passed in match-time options. */ if (((options | re->options) & PCRE_NO_START_OPTIMIZE) == 0) { /* Advance to a unique first char if there is one. */ if (has_first_char) { pcre_uchar smc; if (first_char != first_char2) while (start_match < end_subject && (smc = RAWUCHARTEST(start_match)) != first_char && smc != first_char2) start_match++; else while (start_match < end_subject && RAWUCHARTEST(start_match) != first_char) start_match++; } /* Or to just after a linebreak for a multiline match */ else if (startline) { if (start_match > md->start_subject + start_offset) { #ifdef SUPPORT_UTF if (utf) { while (start_match < end_subject && !WAS_NEWLINE(start_match)) { start_match++; ACROSSCHAR(start_match < end_subject, *start_match, start_match++); } } else #endif while (start_match < end_subject && !WAS_NEWLINE(start_match)) start_match++; /* If we have just passed a CR and the newline option is ANY or ANYCRLF, and we are now at a LF, advance the match position by one more character. */ if (start_match[-1] == CHAR_CR && (md->nltype == NLTYPE_ANY || md->nltype == NLTYPE_ANYCRLF) && start_match < end_subject && RAWUCHARTEST(start_match) == CHAR_NL) start_match++; } } /* Or to a non-unique first byte after study */ else if (start_bits != NULL) { while (start_match < end_subject) { register pcre_uint32 c = RAWUCHARTEST(start_match); #ifndef COMPILE_PCRE8 if (c > 255) c = 255; #endif if ((start_bits[c/8] & (1 << (c&7))) == 0) { start_match++; #if defined SUPPORT_UTF && defined COMPILE_PCRE8 /* In non 8-bit mode, the iteration will stop for characters > 255 at the beginning or not stop at all. */ if (utf) ACROSSCHAR(start_match < end_subject, *start_match, start_match++); #endif } else break; } } } /* Starting optimizations */ /* Restore fudged end_subject */ end_subject = save_end_subject; /* The following two optimizations are disabled for partial matching or if disabling is explicitly requested. */ if (((options | re->options) & PCRE_NO_START_OPTIMIZE) == 0 && !md->partial) { /* If the pattern was studied, a minimum subject length may be set. This is a lower bound; no actual string of that length may actually match the pattern. Although the value is, strictly, in characters, we treat it as bytes to avoid spending too much time in this optimization. */ if (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0 && (pcre_uint32)(end_subject - start_match) < study->minlength) { rc = MATCH_NOMATCH; break; } /* If req_char is set, we know that that character must appear in the subject for the match to succeed. If the first character is set, req_char must be later in the subject; otherwise the test starts at the match point. This optimization can save a huge amount of backtracking in patterns with nested unlimited repeats that aren't going to match. Writing separate code for cased/caseless versions makes it go faster, as does using an autoincrement and backing off on a match. HOWEVER: when the subject string is very, very long, searching to its end can take a long time, and give bad performance on quite ordinary patterns. This showed up when somebody was matching something like /^\d+C/ on a 32-megabyte string... so we don't do this when the string is sufficiently long. */ if (has_req_char && end_subject - start_match < REQ_BYTE_MAX) { register PCRE_PUCHAR p = start_match + (has_first_char? 1:0); /* We don't need to repeat the search if we haven't yet reached the place we found it at last time. */ if (p > req_char_ptr) { if (req_char != req_char2) { while (p < end_subject) { register pcre_uint32 pp = RAWUCHARINCTEST(p); if (pp == req_char || pp == req_char2) { p--; break; } } } else { while (p < end_subject) { if (RAWUCHARINCTEST(p) == req_char) { p--; break; } } } /* If we can't find the required character, break the matching loop, forcing a match failure. */ if (p >= end_subject) { rc = MATCH_NOMATCH; break; } /* If we have found the required character, save the point where we found it, so that we don't search again next time round the loop if the start hasn't passed this character yet. */ req_char_ptr = p; } } } #ifdef PCRE_DEBUG /* Sigh. Some compilers never learn. */ printf(">>>> Match against: "); pchars(start_match, end_subject - start_match, TRUE, md); printf("\n"); #endif /* OK, we can now run the match. If "hitend" is set afterwards, remember the first starting point for which a partial match was found. */ md->start_match_ptr = start_match; md->start_used_ptr = start_match; md->match_call_count = 0; md->match_function_type = 0; md->end_offset_top = 0; rc = match(start_match, md->start_code, start_match, 2, md, NULL, 0); if (md->hitend && start_partial == NULL) { start_partial = md->start_used_ptr; 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; md->ignore_skip_arg = TRUE; break; /* SKIP passes back the next starting point explicitly, but if it is the same as the match we have just done, treat it as NOMATCH. */ case MATCH_SKIP: if (md->start_match_ptr != start_match) { new_start_match = md->start_match_ptr; break; } /* Fall through */ /* NOMATCH and PRUNE advance by one character. THEN at this level acts exactly like PRUNE. Unset the ignore SKIP-with-argument flag. */ case MATCH_NOMATCH: case MATCH_PRUNE: case MATCH_THEN: md->ignore_skip_arg = FALSE; new_start_match = start_match + 1; #ifdef SUPPORT_UTF if (utf) ACROSSCHAR(new_start_match < end_subject, *new_start_match, new_start_match++); #endif break; /* COMMIT disables the bumpalong, but otherwise behaves as NOMATCH. */ case MATCH_COMMIT: rc = MATCH_NOMATCH; goto ENDLOOP; /* Any other return is either a match, or some kind of error. */ default: goto ENDLOOP; } /* Control reaches here for the various types of "no match at this point" result. Reset the code to MATCH_NOMATCH for subsequent checking. */ rc = MATCH_NOMATCH; /* If PCRE_FIRSTLINE is set, the match must happen before or at the first newline in the subject (though it may continue over the newline). Therefore, if we have just failed to match, starting at a newline, do not continue. */ if (firstline && IS_NEWLINE(start_match)) break; /* Advance to new matching position */ start_match = new_start_match; /* Break the loop if the pattern is anchored or if we have passed the end of the subject. */ if (anchored || start_match > end_subject) break; /* If we have just passed a CR and we are now at a LF, and the pattern does not contain any explicit matches for \r or \n, and the newline option is CRLF or ANY or ANYCRLF, advance the match position by one more character. In normal matching start_match will aways be greater than the first position at this stage, but a failed *SKIP can cause a return at the same point, which is why the first test exists. */ if (start_match > (PCRE_PUCHAR)subject + start_offset && start_match[-1] == CHAR_CR && start_match < end_subject && *start_match == CHAR_NL && (re->flags & PCRE_HASCRORLF) == 0 && (md->nltype == NLTYPE_ANY || md->nltype == NLTYPE_ANYCRLF || md->nllen == 2)) start_match++; md->mark = NULL; /* Reset for start of next match attempt */ } /* End of for(;;) "bumpalong" loop */ /* ==========================================================================*/ /* We reach here when rc is not MATCH_NOMATCH, or if one of the stopping conditions is true: (1) The pattern is anchored or the match was failed by (*COMMIT); (2) We are past the end of the subject; (3) PCRE_FIRSTLINE is set and we have failed to match at a newline, because this option requests that a match occur at or before the first newline in the subject. When we have a match and the offset vector is big enough to deal with any backreferences, captured substring offsets will already be set up. In the case where we had to get some local store to hold offsets for backreference processing, copy those that we can. In this case there need not be overflow if certain parts of the pattern were not used, even though there are more capturing parentheses than vector slots. */ ENDLOOP: if (rc == MATCH_MATCH || rc == MATCH_ACCEPT) { if (using_temporary_offsets) { if (arg_offset_max >= 4) { memcpy(offsets + 2, md->offset_vector + 2, (arg_offset_max - 2) * sizeof(int)); DPRINTF(("Copied offsets from temporary memory\n")); } if (md->end_offset_top > arg_offset_max) md->capture_last |= OVFLBIT; DPRINTF(("Freeing temporary memory\n")); (PUBL(free))(md->offset_vector); } /* Set the return code to the number of captured strings, or 0 if there were too many to fit into the vector. */ rc = ((md->capture_last & OVFLBIT) != 0 && md->end_offset_top >= arg_offset_max)? 0 : md->end_offset_top/2; /* If there is space in the offset vector, set any unused pairs at the end of the pattern to -1 for backwards compatibility. It is documented that this happens. In earlier versions, the whole set of potential capturing offsets was set to -1 each time round the loop, but this is handled differently now. "Gaps" are set to -1 dynamically instead (this fixes a bug). Thus, it is only those at the end that need unsetting here. We can't just unset them all at the start of the whole thing because they may get set in one branch that is not the final matching branch. */ if (md->end_offset_top/2 <= re->top_bracket && offsets != NULL) { register int *iptr, *iend; int resetcount = 2 + re->top_bracket * 2; if (resetcount > offsetcount) resetcount = offsetcount; iptr = offsets + md->end_offset_top; iend = offsets + resetcount; while (iptr < iend) *iptr++ = -1; } /* If there is space, set up the whole thing as substring 0. The value of md->start_match_ptr might be modified if \K was encountered on the success matching path. */ if (offsetcount < 2) rc = 0; else { offsets[0] = (int)(md->start_match_ptr - md->start_subject); offsets[1] = (int)(md->end_match_ptr - md->start_subject); } /* Return MARK data if requested */ if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_MARK) != 0) *(extra_data->mark) = (pcre_uchar *)md->mark; DPRINTF((">>>> returning %d\n", rc)); #ifdef NO_RECURSE release_match_heapframes(&frame_zero); #endif return rc; } /* Control gets here if there has been an error, or if the overall match attempt has failed at all permitted starting positions. */ if (using_temporary_offsets) { DPRINTF(("Freeing temporary memory\n")); (PUBL(free))(md->offset_vector); } /* For anything other than nomatch or partial match, just return the code. */ if (rc != MATCH_NOMATCH && rc != PCRE_ERROR_PARTIAL) { DPRINTF((">>>> error: returning %d\n", rc)); #ifdef NO_RECURSE release_match_heapframes(&frame_zero); #endif return rc; } /* Handle partial matches - disable any mark data */ if (start_partial != NULL) { DPRINTF((">>>> returning PCRE_ERROR_PARTIAL\n")); md->mark = NULL; if (offsetcount > 1) { offsets[0] = (int)(start_partial - (PCRE_PUCHAR)subject); offsets[1] = (int)(end_subject - (PCRE_PUCHAR)subject); if (offsetcount > 2) offsets[2] = (int)(match_partial - (PCRE_PUCHAR)subject); } rc = PCRE_ERROR_PARTIAL; } /* This is the classic nomatch case */ else { DPRINTF((">>>> returning PCRE_ERROR_NOMATCH\n")); rc = PCRE_ERROR_NOMATCH; } /* Return the MARK data if it has been requested. */ if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_MARK) != 0) *(extra_data->mark) = (pcre_uchar *)md->nomatch_mark; #ifdef NO_RECURSE release_match_heapframes(&frame_zero); #endif return rc; } /* End of pcre_exec.c */