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authorErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
committerErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
commit84adefa331c4159d432d22840663c38f155cd4c1 (patch)
treebff9a9c66adda4df2106dfd0e5c053ab182a12bd /erts/emulator/pcre/pcre_dfa_exec.c
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The R13B03 release.OTP_R13B03
Diffstat (limited to 'erts/emulator/pcre/pcre_dfa_exec.c')
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+/*************************************************
+* 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) 1997-2008 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 the external function erts_pcre_dfa_exec(), which is an
+alternative matching function that uses a sort of DFA algorithm (not a true
+FSM). This is NOT Perl- compatible, but it has advantages in certain
+applications. */
+
+/* %ExternalCopyright% */
+
+#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"
+
+
+/* For use to indent debugging output */
+
+#define SP " "
+
+
+
+/*************************************************
+* Code parameters and static tables *
+*************************************************/
+
+/* These are offsets that are used to turn the OP_TYPESTAR and friends opcodes
+into others, under special conditions. A gap of 20 between the blocks should be
+enough. The resulting opcodes don't have to be less than 256 because they are
+never stored, so we push them well clear of the normal opcodes. */
+
+#define OP_PROP_EXTRA 300
+#define OP_EXTUNI_EXTRA 320
+#define OP_ANYNL_EXTRA 340
+#define OP_HSPACE_EXTRA 360
+#define OP_VSPACE_EXTRA 380
+
+
+/* This table identifies those opcodes that are followed immediately by a
+character that is to be tested in some way. This makes is possible to
+centralize the loading of these characters. In the case of Type * etc, the
+"character" is the opcode for \D, \d, \S, \s, \W, or \w, which will always be a
+small value. ***NOTE*** If the start of this table is modified, the two tables
+that follow must also be modified. */
+
+static uschar coptable[] = {
+ 0, /* End */
+ 0, 0, 0, 0, 0, /* \A, \G, \K, \B, \b */
+ 0, 0, 0, 0, 0, 0, /* \D, \d, \S, \s, \W, \w */
+ 0, 0, /* Any, Anybyte */
+ 0, 0, 0, /* NOTPROP, PROP, EXTUNI */
+ 0, 0, 0, 0, 0, /* \R, \H, \h, \V, \v */
+ 0, 0, 0, 0, 0, /* \Z, \z, Opt, ^, $ */
+ 1, /* Char */
+ 1, /* Charnc */
+ 1, /* not */
+ /* Positive single-char repeats */
+ 1, 1, 1, 1, 1, 1, /* *, *?, +, +?, ?, ?? */
+ 3, 3, 3, /* upto, minupto, exact */
+ 1, 1, 1, 3, /* *+, ++, ?+, upto+ */
+ /* Negative single-char repeats - only for chars < 256 */
+ 1, 1, 1, 1, 1, 1, /* NOT *, *?, +, +?, ?, ?? */
+ 3, 3, 3, /* NOT upto, minupto, exact */
+ 1, 1, 1, 3, /* NOT *+, ++, ?+, updo+ */
+ /* Positive type repeats */
+ 1, 1, 1, 1, 1, 1, /* Type *, *?, +, +?, ?, ?? */
+ 3, 3, 3, /* Type upto, minupto, exact */
+ 1, 1, 1, 3, /* Type *+, ++, ?+, upto+ */
+ /* Character class & ref repeats */
+ 0, 0, 0, 0, 0, 0, /* *, *?, +, +?, ?, ?? */
+ 0, 0, /* CRRANGE, CRMINRANGE */
+ 0, /* CLASS */
+ 0, /* NCLASS */
+ 0, /* XCLASS - variable length */
+ 0, /* REF */
+ 0, /* RECURSE */
+ 0, /* CALLOUT */
+ 0, /* Alt */
+ 0, /* Ket */
+ 0, /* KetRmax */
+ 0, /* KetRmin */
+ 0, /* Assert */
+ 0, /* Assert not */
+ 0, /* Assert behind */
+ 0, /* Assert behind not */
+ 0, /* Reverse */
+ 0, 0, 0, 0, /* ONCE, BRA, CBRA, COND */
+ 0, 0, 0, /* SBRA, SCBRA, SCOND */
+ 0, /* CREF */
+ 0, /* RREF */
+ 0, /* DEF */
+ 0, 0, /* BRAZERO, BRAMINZERO */
+ 0, 0, 0, 0, /* PRUNE, SKIP, THEN, COMMIT */
+ 0, 0 /* FAIL, ACCEPT */
+};
+
+/* These 2 tables allow for compact code for testing for \D, \d, \S, \s, \W,
+and \w */
+
+static uschar toptable1[] = {
+ 0, 0, 0, 0, 0, 0,
+ ctype_digit, ctype_digit,
+ ctype_space, ctype_space,
+ ctype_word, ctype_word,
+ 0 /* OP_ANY */
+};
+
+static uschar toptable2[] = {
+ 0, 0, 0, 0, 0, 0,
+ ctype_digit, 0,
+ ctype_space, 0,
+ ctype_word, 0,
+ 1 /* OP_ANY */
+};
+
+
+/* Structure for holding data about a particular state, which is in effect the
+current data for an active path through the match tree. It must consist
+entirely of ints because the working vector we are passed, and which we put
+these structures in, is a vector of ints. */
+
+typedef struct stateblock {
+ int offset; /* Offset to opcode */
+ int count; /* Count for repeats */
+ int ims; /* ims flag bits */
+ int data; /* Some use extra data */
+} stateblock;
+
+#define INTS_PER_STATEBLOCK (sizeof(stateblock)/sizeof(int))
+
+
+#ifdef DEBUG
+/*************************************************
+* Print character string *
+*************************************************/
+
+/* Character string printing function for debugging.
+
+Arguments:
+ p points to string
+ length number of bytes
+ f where to print
+
+Returns: nothing
+*/
+
+static void
+pchars(unsigned char *p, int length, FILE *f)
+{
+int c;
+while (length-- > 0)
+ {
+ if (isprint(c = *(p++)))
+ fprintf(f, "%c", c);
+ else
+ fprintf(f, "\\x%02x", c);
+ }
+}
+#endif
+
+
+
+/*************************************************
+* Execute a Regular Expression - DFA engine *
+*************************************************/
+
+/* This internal function applies a compiled pattern to a subject string,
+starting at a given point, using a DFA engine. This function is called from the
+external one, possibly multiple times if the pattern is not anchored. The
+function calls itself recursively for some kinds of subpattern.
+
+Arguments:
+ md the match_data block with fixed information
+ this_start_code the opening bracket of this subexpression's code
+ current_subject where we currently are in the subject string
+ start_offset start offset in the subject string
+ offsets vector to contain the matching string offsets
+ offsetcount size of same
+ workspace vector of workspace
+ wscount size of same
+ ims the current ims flags
+ rlevel function call recursion level
+ recursing regex recursive call level
+
+Returns: > 0 =>
+ = 0 =>
+ -1 => failed to match
+ < -1 => some kind of unexpected problem
+
+The following macros are used for adding states to the two state vectors (one
+for the current character, one for the following character). */
+
+#define ADD_ACTIVE(x,y) \
+ if (active_count++ < wscount) \
+ { \
+ next_active_state->offset = (x); \
+ next_active_state->count = (y); \
+ next_active_state->ims = ims; \
+ next_active_state++; \
+ DPRINTF(("%.*sADD_ACTIVE(%d,%d)\n", rlevel*2-2, SP, (x), (y))); \
+ } \
+ else return PCRE_ERROR_DFA_WSSIZE
+
+#define ADD_ACTIVE_DATA(x,y,z) \
+ if (active_count++ < wscount) \
+ { \
+ next_active_state->offset = (x); \
+ next_active_state->count = (y); \
+ next_active_state->ims = ims; \
+ next_active_state->data = (z); \
+ next_active_state++; \
+ DPRINTF(("%.*sADD_ACTIVE_DATA(%d,%d,%d)\n", rlevel*2-2, SP, (x), (y), (z))); \
+ } \
+ else return PCRE_ERROR_DFA_WSSIZE
+
+#define ADD_NEW(x,y) \
+ if (new_count++ < wscount) \
+ { \
+ next_new_state->offset = (x); \
+ next_new_state->count = (y); \
+ next_new_state->ims = ims; \
+ next_new_state++; \
+ DPRINTF(("%.*sADD_NEW(%d,%d)\n", rlevel*2-2, SP, (x), (y))); \
+ } \
+ else return PCRE_ERROR_DFA_WSSIZE
+
+#define ADD_NEW_DATA(x,y,z) \
+ if (new_count++ < wscount) \
+ { \
+ next_new_state->offset = (x); \
+ next_new_state->count = (y); \
+ next_new_state->ims = ims; \
+ next_new_state->data = (z); \
+ next_new_state++; \
+ DPRINTF(("%.*sADD_NEW_DATA(%d,%d,%d)\n", rlevel*2-2, SP, (x), (y), (z))); \
+ } \
+ else return PCRE_ERROR_DFA_WSSIZE
+
+/* And now, here is the code */
+
+static int
+internal_dfa_exec(
+ dfa_match_data *md,
+ const uschar *this_start_code,
+ const uschar *current_subject,
+ int start_offset,
+ int *offsets,
+ int offsetcount,
+ int *workspace,
+ int wscount,
+ int ims,
+ int rlevel,
+ int recursing)
+{
+stateblock *active_states, *new_states, *temp_states;
+stateblock *next_active_state, *next_new_state;
+
+const uschar *ctypes, *lcc, *fcc;
+const uschar *ptr;
+const uschar *end_code, *first_op;
+
+int active_count, new_count, match_count;
+
+/* Some fields in the md block are frequently referenced, so we load them into
+independent variables in the hope that this will perform better. */
+
+const uschar *start_subject = md->start_subject;
+const uschar *end_subject = md->end_subject;
+const uschar *start_code = md->start_code;
+
+#ifdef SUPPORT_UTF8
+BOOL utf8 = (md->poptions & PCRE_UTF8) != 0;
+#else
+BOOL utf8 = FALSE;
+#endif
+
+rlevel++;
+offsetcount &= (-2);
+
+wscount -= 2;
+wscount = (wscount - (wscount % (INTS_PER_STATEBLOCK * 2))) /
+ (2 * INTS_PER_STATEBLOCK);
+
+DPRINTF(("\n%.*s---------------------\n"
+ "%.*sCall to internal_dfa_exec f=%d r=%d\n",
+ rlevel*2-2, SP, rlevel*2-2, SP, rlevel, recursing));
+
+ctypes = md->tables + ctypes_offset;
+lcc = md->tables + lcc_offset;
+fcc = md->tables + fcc_offset;
+
+match_count = PCRE_ERROR_NOMATCH; /* A negative number */
+
+active_states = (stateblock *)(workspace + 2);
+next_new_state = new_states = active_states + wscount;
+new_count = 0;
+
+first_op = this_start_code + 1 + LINK_SIZE +
+ ((*this_start_code == OP_CBRA || *this_start_code == OP_SCBRA)? 2:0);
+
+/* The first thing in any (sub) pattern is a bracket of some sort. Push all
+the alternative states onto the list, and find out where the end is. This
+makes is possible to use this function recursively, when we want to stop at a
+matching internal ket rather than at the end.
+
+If the first opcode in the first alternative is OP_REVERSE, we are dealing with
+a backward assertion. In that case, we have to find out the maximum amount to
+move back, and set up each alternative appropriately. */
+
+if (*first_op == OP_REVERSE)
+ {
+ int max_back = 0;
+ int gone_back;
+
+ end_code = this_start_code;
+ do
+ {
+ int back = GET(end_code, 2+LINK_SIZE);
+ if (back > max_back) max_back = back;
+ end_code += GET(end_code, 1);
+ }
+ while (*end_code == OP_ALT);
+
+ /* If we can't go back the amount required for the longest lookbehind
+ pattern, go back as far as we can; some alternatives may still be viable. */
+
+#ifdef SUPPORT_UTF8
+ /* In character mode we have to step back character by character */
+
+ if (utf8)
+ {
+ for (gone_back = 0; gone_back < max_back; gone_back++)
+ {
+ if (current_subject <= start_subject) break;
+ current_subject--;
+ while (current_subject > start_subject &&
+ (*current_subject & 0xc0) == 0x80)
+ current_subject--;
+ }
+ }
+ else
+#endif
+
+ /* In byte-mode we can do this quickly. */
+
+ {
+ gone_back = (current_subject - max_back < start_subject)?
+ current_subject - start_subject : max_back;
+ current_subject -= gone_back;
+ }
+
+ /* Now we can process the individual branches. */
+
+ end_code = this_start_code;
+ do
+ {
+ int back = GET(end_code, 2+LINK_SIZE);
+ if (back <= gone_back)
+ {
+ int bstate = end_code - start_code + 2 + 2*LINK_SIZE;
+ ADD_NEW_DATA(-bstate, 0, gone_back - back);
+ }
+ end_code += GET(end_code, 1);
+ }
+ while (*end_code == OP_ALT);
+ }
+
+/* This is the code for a "normal" subpattern (not a backward assertion). The
+start of a whole pattern is always one of these. If we are at the top level,
+we may be asked to restart matching from the same point that we reached for a
+previous partial match. We still have to scan through the top-level branches to
+find the end state. */
+
+else
+ {
+ end_code = this_start_code;
+
+ /* Restarting */
+
+ if (rlevel == 1 && (md->moptions & PCRE_DFA_RESTART) != 0)
+ {
+ do { end_code += GET(end_code, 1); } while (*end_code == OP_ALT);
+ new_count = workspace[1];
+ if (!workspace[0])
+ memcpy(new_states, active_states, new_count * sizeof(stateblock));
+ }
+
+ /* Not restarting */
+
+ else
+ {
+ int length = 1 + LINK_SIZE +
+ ((*this_start_code == OP_CBRA || *this_start_code == OP_SCBRA)? 2:0);
+ do
+ {
+ ADD_NEW(end_code - start_code + length, 0);
+ end_code += GET(end_code, 1);
+ length = 1 + LINK_SIZE;
+ }
+ while (*end_code == OP_ALT);
+ }
+ }
+
+workspace[0] = 0; /* Bit indicating which vector is current */
+
+DPRINTF(("%.*sEnd state = %d\n", rlevel*2-2, SP, end_code - start_code));
+
+/* Loop for scanning the subject */
+
+ptr = current_subject;
+for (;;)
+ {
+ int i, j;
+ int clen, dlen;
+ unsigned int c, d;
+
+ /* Make the new state list into the active state list and empty the
+ new state list. */
+
+ temp_states = active_states;
+ active_states = new_states;
+ new_states = temp_states;
+ active_count = new_count;
+ new_count = 0;
+
+ workspace[0] ^= 1; /* Remember for the restarting feature */
+ workspace[1] = active_count;
+
+#ifdef DEBUG
+ printf("%.*sNext character: rest of subject = \"", rlevel*2-2, SP);
+ pchars((uschar *)ptr, strlen((char *)ptr), stdout);
+ printf("\"\n");
+
+ printf("%.*sActive states: ", rlevel*2-2, SP);
+ for (i = 0; i < active_count; i++)
+ printf("%d/%d ", active_states[i].offset, active_states[i].count);
+ printf("\n");
+#endif
+
+ /* Set the pointers for adding new states */
+
+ next_active_state = active_states + active_count;
+ next_new_state = new_states;
+
+ /* Load the current character from the subject outside the loop, as many
+ different states may want to look at it, and we assume that at least one
+ will. */
+
+ if (ptr < end_subject)
+ {
+ clen = 1; /* Number of bytes in the character */
+#ifdef SUPPORT_UTF8
+ if (utf8) { GETCHARLEN(c, ptr, clen); } else
+#endif /* SUPPORT_UTF8 */
+ c = *ptr;
+ }
+ else
+ {
+ clen = 0; /* This indicates the end of the subject */
+ c = NOTACHAR; /* This value should never actually be used */
+ }
+
+ /* Scan up the active states and act on each one. The result of an action
+ may be to add more states to the currently active list (e.g. on hitting a
+ parenthesis) or it may be to put states on the new list, for considering
+ when we move the character pointer on. */
+
+ for (i = 0; i < active_count; i++)
+ {
+ stateblock *current_state = active_states + i;
+ const uschar *code;
+ int state_offset = current_state->offset;
+ int count, codevalue;
+#ifdef SUPPORT_UCP
+ int chartype, script;
+#endif
+
+#ifdef DEBUG
+ printf ("%.*sProcessing state %d c=", rlevel*2-2, SP, state_offset);
+ if (clen == 0) printf("EOL\n");
+ else if (c > 32 && c < 127) printf("'%c'\n", c);
+ else printf("0x%02x\n", c);
+#endif
+
+ /* This variable is referred to implicity in the ADD_xxx macros. */
+
+ ims = current_state->ims;
+
+ /* A negative offset is a special case meaning "hold off going to this
+ (negated) state until the number of characters in the data field have
+ been skipped". */
+
+ if (state_offset < 0)
+ {
+ if (current_state->data > 0)
+ {
+ DPRINTF(("%.*sSkipping this character\n", rlevel*2-2, SP));
+ ADD_NEW_DATA(state_offset, current_state->count,
+ current_state->data - 1);
+ continue;
+ }
+ else
+ {
+ current_state->offset = state_offset = -state_offset;
+ }
+ }
+
+ /* Check for a duplicate state with the same count, and skip if found. */
+
+ for (j = 0; j < i; j++)
+ {
+ if (active_states[j].offset == state_offset &&
+ active_states[j].count == current_state->count)
+ {
+ DPRINTF(("%.*sDuplicate state: skipped\n", rlevel*2-2, SP));
+ goto NEXT_ACTIVE_STATE;
+ }
+ }
+
+ /* The state offset is the offset to the opcode */
+
+ code = start_code + state_offset;
+ codevalue = *code;
+
+ /* If this opcode is followed by an inline character, load it. It is
+ tempting to test for the presence of a subject character here, but that
+ is wrong, because sometimes zero repetitions of the subject are
+ permitted.
+
+ We also use this mechanism for opcodes such as OP_TYPEPLUS that take an
+ argument that is not a data character - but is always one byte long. We
+ have to take special action to deal with \P, \p, \H, \h, \V, \v and \X in
+ this case. To keep the other cases fast, convert these ones to new opcodes.
+ */
+
+ if (coptable[codevalue] > 0)
+ {
+ dlen = 1;
+#ifdef SUPPORT_UTF8
+ if (utf8) { GETCHARLEN(d, (code + coptable[codevalue]), dlen); } else
+#endif /* SUPPORT_UTF8 */
+ d = code[coptable[codevalue]];
+ if (codevalue >= OP_TYPESTAR)
+ {
+ switch(d)
+ {
+ case OP_ANYBYTE: return PCRE_ERROR_DFA_UITEM;
+ case OP_NOTPROP:
+ case OP_PROP: codevalue += OP_PROP_EXTRA; break;
+ case OP_ANYNL: codevalue += OP_ANYNL_EXTRA; break;
+ case OP_EXTUNI: codevalue += OP_EXTUNI_EXTRA; break;
+ case OP_NOT_HSPACE:
+ case OP_HSPACE: codevalue += OP_HSPACE_EXTRA; break;
+ case OP_NOT_VSPACE:
+ case OP_VSPACE: codevalue += OP_VSPACE_EXTRA; break;
+ default: break;
+ }
+ }
+ }
+ else
+ {
+ dlen = 0; /* Not strictly necessary, but compilers moan */
+ d = NOTACHAR; /* if these variables are not set. */
+ }
+
+
+ /* Now process the individual opcodes */
+
+ switch (codevalue)
+ {
+
+/* ========================================================================== */
+ /* Reached a closing bracket. If not at the end of the pattern, carry
+ on with the next opcode. Otherwise, unless we have an empty string and
+ PCRE_NOTEMPTY is set, save the match data, shifting up all previous
+ matches so we always have the longest first. */
+
+ case OP_KET:
+ case OP_KETRMIN:
+ case OP_KETRMAX:
+ if (code != end_code)
+ {
+ ADD_ACTIVE(state_offset + 1 + LINK_SIZE, 0);
+ if (codevalue != OP_KET)
+ {
+ ADD_ACTIVE(state_offset - GET(code, 1), 0);
+ }
+ }
+ else if (ptr > current_subject || (md->moptions & PCRE_NOTEMPTY) == 0)
+ {
+ if (match_count < 0) match_count = (offsetcount >= 2)? 1 : 0;
+ else if (match_count > 0 && ++match_count * 2 >= offsetcount)
+ match_count = 0;
+ count = ((match_count == 0)? offsetcount : match_count * 2) - 2;
+ if (count > 0) memmove(offsets + 2, offsets, count * sizeof(int));
+ if (offsetcount >= 2)
+ {
+ offsets[0] = current_subject - start_subject;
+ offsets[1] = ptr - start_subject;
+ DPRINTF(("%.*sSet matched string = \"%.*s\"\n", rlevel*2-2, SP,
+ offsets[1] - offsets[0], current_subject));
+ }
+ if ((md->moptions & PCRE_DFA_SHORTEST) != 0)
+ {
+ DPRINTF(("%.*sEnd of internal_dfa_exec %d: returning %d\n"
+ "%.*s---------------------\n\n", rlevel*2-2, SP, rlevel,
+ match_count, rlevel*2-2, SP));
+ return match_count;
+ }
+ }
+ break;
+
+/* ========================================================================== */
+ /* These opcodes add to the current list of states without looking
+ at the current character. */
+
+ /*-----------------------------------------------------------------*/
+ case OP_ALT:
+ do { code += GET(code, 1); } while (*code == OP_ALT);
+ ADD_ACTIVE(code - start_code, 0);
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_BRA:
+ case OP_SBRA:
+ do
+ {
+ ADD_ACTIVE(code - start_code + 1 + LINK_SIZE, 0);
+ code += GET(code, 1);
+ }
+ while (*code == OP_ALT);
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_CBRA:
+ case OP_SCBRA:
+ ADD_ACTIVE(code - start_code + 3 + LINK_SIZE, 0);
+ code += GET(code, 1);
+ while (*code == OP_ALT)
+ {
+ ADD_ACTIVE(code - start_code + 1 + LINK_SIZE, 0);
+ code += GET(code, 1);
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_BRAZERO:
+ case OP_BRAMINZERO:
+ ADD_ACTIVE(state_offset + 1, 0);
+ code += 1 + GET(code, 2);
+ while (*code == OP_ALT) code += GET(code, 1);
+ ADD_ACTIVE(code - start_code + 1 + LINK_SIZE, 0);
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_CIRC:
+ if ((ptr == start_subject && (md->moptions & PCRE_NOTBOL) == 0) ||
+ ((ims & PCRE_MULTILINE) != 0 &&
+ ptr != end_subject &&
+ WAS_NEWLINE(ptr)))
+ { ADD_ACTIVE(state_offset + 1, 0); }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_EOD:
+ if (ptr >= end_subject) { ADD_ACTIVE(state_offset + 1, 0); }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_OPT:
+ ims = code[1];
+ ADD_ACTIVE(state_offset + 2, 0);
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_SOD:
+ if (ptr == start_subject) { ADD_ACTIVE(state_offset + 1, 0); }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_SOM:
+ if (ptr == start_subject + start_offset) { ADD_ACTIVE(state_offset + 1, 0); }
+ break;
+
+
+/* ========================================================================== */
+ /* These opcodes inspect the next subject character, and sometimes
+ the previous one as well, but do not have an argument. The variable
+ clen contains the length of the current character and is zero if we are
+ at the end of the subject. */
+
+ /*-----------------------------------------------------------------*/
+ case OP_ANY:
+ if (clen > 0 && ((ims & PCRE_DOTALL) != 0 || !IS_NEWLINE(ptr)))
+ { ADD_NEW(state_offset + 1, 0); }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_EODN:
+ if (clen == 0 || (IS_NEWLINE(ptr) && ptr == end_subject - md->nllen))
+ { ADD_ACTIVE(state_offset + 1, 0); }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_DOLL:
+ if ((md->moptions & PCRE_NOTEOL) == 0)
+ {
+ if (clen == 0 ||
+ (IS_NEWLINE(ptr) &&
+ ((ims & PCRE_MULTILINE) != 0 || ptr == end_subject - md->nllen)
+ ))
+ { ADD_ACTIVE(state_offset + 1, 0); }
+ }
+ else if ((ims & PCRE_MULTILINE) != 0 && IS_NEWLINE(ptr))
+ { ADD_ACTIVE(state_offset + 1, 0); }
+ break;
+
+ /*-----------------------------------------------------------------*/
+
+ case OP_DIGIT:
+ case OP_WHITESPACE:
+ case OP_WORDCHAR:
+ if (clen > 0 && c < 256 &&
+ ((ctypes[c] & toptable1[codevalue]) ^ toptable2[codevalue]) != 0)
+ { ADD_NEW(state_offset + 1, 0); }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_NOT_DIGIT:
+ case OP_NOT_WHITESPACE:
+ case OP_NOT_WORDCHAR:
+ if (clen > 0 && (c >= 256 ||
+ ((ctypes[c] & toptable1[codevalue]) ^ toptable2[codevalue]) != 0))
+ { ADD_NEW(state_offset + 1, 0); }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_WORD_BOUNDARY:
+ case OP_NOT_WORD_BOUNDARY:
+ {
+ int left_word, right_word;
+
+ if (ptr > start_subject)
+ {
+ const uschar *temp = ptr - 1;
+#ifdef SUPPORT_UTF8
+ if (utf8) BACKCHAR(temp);
+#endif
+ GETCHARTEST(d, temp);
+ left_word = d < 256 && (ctypes[d] & ctype_word) != 0;
+ }
+ else left_word = 0;
+
+ if (clen > 0) right_word = c < 256 && (ctypes[c] & ctype_word) != 0;
+ else right_word = 0;
+
+ if ((left_word == right_word) == (codevalue == OP_NOT_WORD_BOUNDARY))
+ { ADD_ACTIVE(state_offset + 1, 0); }
+ }
+ break;
+
+
+ /*-----------------------------------------------------------------*/
+ /* 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.
+ */
+
+#ifdef SUPPORT_UCP
+ case OP_PROP:
+ case OP_NOTPROP:
+ if (clen > 0)
+ {
+ BOOL OK;
+ int category = _erts_pcre_ucp_findprop(c, &chartype, &script);
+ switch(code[1])
+ {
+ case PT_ANY:
+ OK = TRUE;
+ break;
+
+ case PT_LAMP:
+ OK = chartype == ucp_Lu || chartype == ucp_Ll || chartype == ucp_Lt;
+ break;
+
+ case PT_GC:
+ OK = category == code[2];
+ break;
+
+ case PT_PC:
+ OK = chartype == code[2];
+ break;
+
+ case PT_SC:
+ OK = script == code[2];
+ break;
+
+ /* Should never occur, but keep compilers from grumbling. */
+
+ default:
+ OK = codevalue != OP_PROP;
+ break;
+ }
+
+ if (OK == (codevalue == OP_PROP)) { ADD_NEW(state_offset + 3, 0); }
+ }
+ break;
+#endif
+
+
+
+/* ========================================================================== */
+ /* These opcodes likewise inspect the subject character, but have an
+ argument that is not a data character. It is one of these opcodes:
+ OP_ANY, OP_DIGIT, OP_NOT_DIGIT, OP_WHITESPACE, OP_NOT_SPACE, OP_WORDCHAR,
+ OP_NOT_WORDCHAR. The value is loaded into d. */
+
+ case OP_TYPEPLUS:
+ case OP_TYPEMINPLUS:
+ case OP_TYPEPOSPLUS:
+ count = current_state->count; /* Already matched */
+ if (count > 0) { ADD_ACTIVE(state_offset + 2, 0); }
+ if (clen > 0)
+ {
+ if ((c >= 256 && d != OP_DIGIT && d != OP_WHITESPACE && d != OP_WORDCHAR) ||
+ (c < 256 &&
+ (d != OP_ANY ||
+ (ims & PCRE_DOTALL) != 0 ||
+ !IS_NEWLINE(ptr)
+ ) &&
+ ((ctypes[c] & toptable1[d]) ^ toptable2[d]) != 0))
+ {
+ if (count > 0 && codevalue == OP_TYPEPOSPLUS)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ count++;
+ ADD_NEW(state_offset, count);
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_TYPEQUERY:
+ case OP_TYPEMINQUERY:
+ case OP_TYPEPOSQUERY:
+ ADD_ACTIVE(state_offset + 2, 0);
+ if (clen > 0)
+ {
+ if ((c >= 256 && d != OP_DIGIT && d != OP_WHITESPACE && d != OP_WORDCHAR) ||
+ (c < 256 &&
+ (d != OP_ANY ||
+ (ims & PCRE_DOTALL) != 0 ||
+ !IS_NEWLINE(ptr)
+ ) &&
+ ((ctypes[c] & toptable1[d]) ^ toptable2[d]) != 0))
+ {
+ if (codevalue == OP_TYPEPOSQUERY)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ ADD_NEW(state_offset + 2, 0);
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_TYPESTAR:
+ case OP_TYPEMINSTAR:
+ case OP_TYPEPOSSTAR:
+ ADD_ACTIVE(state_offset + 2, 0);
+ if (clen > 0)
+ {
+ if ((c >= 256 && d != OP_DIGIT && d != OP_WHITESPACE && d != OP_WORDCHAR) ||
+ (c < 256 &&
+ (d != OP_ANY ||
+ (ims & PCRE_DOTALL) != 0 ||
+ !IS_NEWLINE(ptr)
+ ) &&
+ ((ctypes[c] & toptable1[d]) ^ toptable2[d]) != 0))
+ {
+ if (codevalue == OP_TYPEPOSSTAR)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ ADD_NEW(state_offset, 0);
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_TYPEEXACT:
+ count = current_state->count; /* Number already matched */
+ if (clen > 0)
+ {
+ if ((c >= 256 && d != OP_DIGIT && d != OP_WHITESPACE && d != OP_WORDCHAR) ||
+ (c < 256 &&
+ (d != OP_ANY ||
+ (ims & PCRE_DOTALL) != 0 ||
+ !IS_NEWLINE(ptr)
+ ) &&
+ ((ctypes[c] & toptable1[d]) ^ toptable2[d]) != 0))
+ {
+ if (++count >= GET2(code, 1))
+ { ADD_NEW(state_offset + 4, 0); }
+ else
+ { ADD_NEW(state_offset, count); }
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_TYPEUPTO:
+ case OP_TYPEMINUPTO:
+ case OP_TYPEPOSUPTO:
+ ADD_ACTIVE(state_offset + 4, 0);
+ count = current_state->count; /* Number already matched */
+ if (clen > 0)
+ {
+ if ((c >= 256 && d != OP_DIGIT && d != OP_WHITESPACE && d != OP_WORDCHAR) ||
+ (c < 256 &&
+ (d != OP_ANY ||
+ (ims & PCRE_DOTALL) != 0 ||
+ !IS_NEWLINE(ptr)
+ ) &&
+ ((ctypes[c] & toptable1[d]) ^ toptable2[d]) != 0))
+ {
+ if (codevalue == OP_TYPEPOSUPTO)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ if (++count >= GET2(code, 1))
+ { ADD_NEW(state_offset + 4, 0); }
+ else
+ { ADD_NEW(state_offset, count); }
+ }
+ }
+ break;
+
+/* ========================================================================== */
+ /* These are virtual opcodes that are used when something like
+ OP_TYPEPLUS has OP_PROP, OP_NOTPROP, OP_ANYNL, or OP_EXTUNI as its
+ argument. It keeps the code above fast for the other cases. The argument
+ is in the d variable. */
+
+#ifdef SUPPORT_UCP
+ case OP_PROP_EXTRA + OP_TYPEPLUS:
+ case OP_PROP_EXTRA + OP_TYPEMINPLUS:
+ case OP_PROP_EXTRA + OP_TYPEPOSPLUS:
+ count = current_state->count; /* Already matched */
+ if (count > 0) { ADD_ACTIVE(state_offset + 4, 0); }
+ if (clen > 0)
+ {
+ BOOL OK;
+ int category = _erts_pcre_ucp_findprop(c, &chartype, &script);
+ switch(code[2])
+ {
+ case PT_ANY:
+ OK = TRUE;
+ break;
+
+ case PT_LAMP:
+ OK = chartype == ucp_Lu || chartype == ucp_Ll || chartype == ucp_Lt;
+ break;
+
+ case PT_GC:
+ OK = category == code[3];
+ break;
+
+ case PT_PC:
+ OK = chartype == code[3];
+ break;
+
+ case PT_SC:
+ OK = script == code[3];
+ break;
+
+ /* Should never occur, but keep compilers from grumbling. */
+
+ default:
+ OK = codevalue != OP_PROP;
+ break;
+ }
+
+ if (OK == (d == OP_PROP))
+ {
+ if (count > 0 && codevalue == OP_PROP_EXTRA + OP_TYPEPOSPLUS)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ count++;
+ ADD_NEW(state_offset, count);
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_EXTUNI_EXTRA + OP_TYPEPLUS:
+ case OP_EXTUNI_EXTRA + OP_TYPEMINPLUS:
+ case OP_EXTUNI_EXTRA + OP_TYPEPOSPLUS:
+ count = current_state->count; /* Already matched */
+ if (count > 0) { ADD_ACTIVE(state_offset + 2, 0); }
+ if (clen > 0 && _erts_pcre_ucp_findprop(c, &chartype, &script) != ucp_M)
+ {
+ const uschar *nptr = ptr + clen;
+ int ncount = 0;
+ if (count > 0 && codevalue == OP_EXTUNI_EXTRA + OP_TYPEPOSPLUS)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ while (nptr < end_subject)
+ {
+ int nd;
+ int ndlen = 1;
+ GETCHARLEN(nd, nptr, ndlen);
+ if (_erts_pcre_ucp_findprop(nd, &chartype, &script) != ucp_M) break;
+ ncount++;
+ nptr += ndlen;
+ }
+ count++;
+ ADD_NEW_DATA(-state_offset, count, ncount);
+ }
+ break;
+#endif
+
+ /*-----------------------------------------------------------------*/
+ case OP_ANYNL_EXTRA + OP_TYPEPLUS:
+ case OP_ANYNL_EXTRA + OP_TYPEMINPLUS:
+ case OP_ANYNL_EXTRA + OP_TYPEPOSPLUS:
+ count = current_state->count; /* Already matched */
+ if (count > 0) { ADD_ACTIVE(state_offset + 2, 0); }
+ if (clen > 0)
+ {
+ int ncount = 0;
+ switch (c)
+ {
+ case 0x000b:
+ case 0x000c:
+ case 0x0085:
+ case 0x2028:
+ case 0x2029:
+ if ((md->moptions & PCRE_BSR_ANYCRLF) != 0) break;
+ goto ANYNL01;
+
+ case 0x000d:
+ if (ptr + 1 < end_subject && ptr[1] == 0x0a) ncount = 1;
+ /* Fall through */
+
+ ANYNL01:
+ case 0x000a:
+ if (count > 0 && codevalue == OP_ANYNL_EXTRA + OP_TYPEPOSPLUS)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ count++;
+ ADD_NEW_DATA(-state_offset, count, ncount);
+ break;
+
+ default:
+ break;
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_VSPACE_EXTRA + OP_TYPEPLUS:
+ case OP_VSPACE_EXTRA + OP_TYPEMINPLUS:
+ case OP_VSPACE_EXTRA + OP_TYPEPOSPLUS:
+ count = current_state->count; /* Already matched */
+ if (count > 0) { ADD_ACTIVE(state_offset + 2, 0); }
+ if (clen > 0)
+ {
+ BOOL OK;
+ switch (c)
+ {
+ case 0x000a:
+ case 0x000b:
+ case 0x000c:
+ case 0x000d:
+ case 0x0085:
+ case 0x2028:
+ case 0x2029:
+ OK = TRUE;
+ break;
+
+ default:
+ OK = FALSE;
+ break;
+ }
+
+ if (OK == (d == OP_VSPACE))
+ {
+ if (count > 0 && codevalue == OP_VSPACE_EXTRA + OP_TYPEPOSPLUS)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ count++;
+ ADD_NEW_DATA(-state_offset, count, 0);
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_HSPACE_EXTRA + OP_TYPEPLUS:
+ case OP_HSPACE_EXTRA + OP_TYPEMINPLUS:
+ case OP_HSPACE_EXTRA + OP_TYPEPOSPLUS:
+ count = current_state->count; /* Already matched */
+ if (count > 0) { ADD_ACTIVE(state_offset + 2, 0); }
+ if (clen > 0)
+ {
+ BOOL OK;
+ switch (c)
+ {
+ case 0x09: /* HT */
+ case 0x20: /* SPACE */
+ case 0xa0: /* NBSP */
+ case 0x1680: /* OGHAM SPACE MARK */
+ case 0x180e: /* MONGOLIAN VOWEL SEPARATOR */
+ case 0x2000: /* EN QUAD */
+ case 0x2001: /* EM QUAD */
+ case 0x2002: /* EN SPACE */
+ case 0x2003: /* EM SPACE */
+ case 0x2004: /* THREE-PER-EM SPACE */
+ case 0x2005: /* FOUR-PER-EM SPACE */
+ case 0x2006: /* SIX-PER-EM SPACE */
+ case 0x2007: /* FIGURE SPACE */
+ case 0x2008: /* PUNCTUATION SPACE */
+ case 0x2009: /* THIN SPACE */
+ case 0x200A: /* HAIR SPACE */
+ case 0x202f: /* NARROW NO-BREAK SPACE */
+ case 0x205f: /* MEDIUM MATHEMATICAL SPACE */
+ case 0x3000: /* IDEOGRAPHIC SPACE */
+ OK = TRUE;
+ break;
+
+ default:
+ OK = FALSE;
+ break;
+ }
+
+ if (OK == (d == OP_HSPACE))
+ {
+ if (count > 0 && codevalue == OP_HSPACE_EXTRA + OP_TYPEPOSPLUS)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ count++;
+ ADD_NEW_DATA(-state_offset, count, 0);
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+#ifdef SUPPORT_UCP
+ case OP_PROP_EXTRA + OP_TYPEQUERY:
+ case OP_PROP_EXTRA + OP_TYPEMINQUERY:
+ case OP_PROP_EXTRA + OP_TYPEPOSQUERY:
+ count = 4;
+ goto QS1;
+
+ case OP_PROP_EXTRA + OP_TYPESTAR:
+ case OP_PROP_EXTRA + OP_TYPEMINSTAR:
+ case OP_PROP_EXTRA + OP_TYPEPOSSTAR:
+ count = 0;
+
+ QS1:
+
+ ADD_ACTIVE(state_offset + 4, 0);
+ if (clen > 0)
+ {
+ BOOL OK;
+ int category = _erts_pcre_ucp_findprop(c, &chartype, &script);
+ switch(code[2])
+ {
+ case PT_ANY:
+ OK = TRUE;
+ break;
+
+ case PT_LAMP:
+ OK = chartype == ucp_Lu || chartype == ucp_Ll || chartype == ucp_Lt;
+ break;
+
+ case PT_GC:
+ OK = category == code[3];
+ break;
+
+ case PT_PC:
+ OK = chartype == code[3];
+ break;
+
+ case PT_SC:
+ OK = script == code[3];
+ break;
+
+ /* Should never occur, but keep compilers from grumbling. */
+
+ default:
+ OK = codevalue != OP_PROP;
+ break;
+ }
+
+ if (OK == (d == OP_PROP))
+ {
+ if (codevalue == OP_PROP_EXTRA + OP_TYPEPOSSTAR ||
+ codevalue == OP_PROP_EXTRA + OP_TYPEPOSQUERY)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ ADD_NEW(state_offset + count, 0);
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_EXTUNI_EXTRA + OP_TYPEQUERY:
+ case OP_EXTUNI_EXTRA + OP_TYPEMINQUERY:
+ case OP_EXTUNI_EXTRA + OP_TYPEPOSQUERY:
+ count = 2;
+ goto QS2;
+
+ case OP_EXTUNI_EXTRA + OP_TYPESTAR:
+ case OP_EXTUNI_EXTRA + OP_TYPEMINSTAR:
+ case OP_EXTUNI_EXTRA + OP_TYPEPOSSTAR:
+ count = 0;
+
+ QS2:
+
+ ADD_ACTIVE(state_offset + 2, 0);
+ if (clen > 0 && _erts_pcre_ucp_findprop(c, &chartype, &script) != ucp_M)
+ {
+ const uschar *nptr = ptr + clen;
+ int ncount = 0;
+ if (codevalue == OP_EXTUNI_EXTRA + OP_TYPEPOSSTAR ||
+ codevalue == OP_EXTUNI_EXTRA + OP_TYPEPOSQUERY)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ while (nptr < end_subject)
+ {
+ int nd;
+ int ndlen = 1;
+ GETCHARLEN(nd, nptr, ndlen);
+ if (_erts_pcre_ucp_findprop(nd, &chartype, &script) != ucp_M) break;
+ ncount++;
+ nptr += ndlen;
+ }
+ ADD_NEW_DATA(-(state_offset + count), 0, ncount);
+ }
+ break;
+#endif
+
+ /*-----------------------------------------------------------------*/
+ case OP_ANYNL_EXTRA + OP_TYPEQUERY:
+ case OP_ANYNL_EXTRA + OP_TYPEMINQUERY:
+ case OP_ANYNL_EXTRA + OP_TYPEPOSQUERY:
+ count = 2;
+ goto QS3;
+
+ case OP_ANYNL_EXTRA + OP_TYPESTAR:
+ case OP_ANYNL_EXTRA + OP_TYPEMINSTAR:
+ case OP_ANYNL_EXTRA + OP_TYPEPOSSTAR:
+ count = 0;
+
+ QS3:
+ ADD_ACTIVE(state_offset + 2, 0);
+ if (clen > 0)
+ {
+ int ncount = 0;
+ switch (c)
+ {
+ case 0x000b:
+ case 0x000c:
+ case 0x0085:
+ case 0x2028:
+ case 0x2029:
+ if ((md->moptions & PCRE_BSR_ANYCRLF) != 0) break;
+ goto ANYNL02;
+
+ case 0x000d:
+ if (ptr + 1 < end_subject && ptr[1] == 0x0a) ncount = 1;
+ /* Fall through */
+
+ ANYNL02:
+ case 0x000a:
+ if (codevalue == OP_ANYNL_EXTRA + OP_TYPEPOSSTAR ||
+ codevalue == OP_ANYNL_EXTRA + OP_TYPEPOSQUERY)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ ADD_NEW_DATA(-(state_offset + count), 0, ncount);
+ break;
+
+ default:
+ break;
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_VSPACE_EXTRA + OP_TYPEQUERY:
+ case OP_VSPACE_EXTRA + OP_TYPEMINQUERY:
+ case OP_VSPACE_EXTRA + OP_TYPEPOSQUERY:
+ count = 2;
+ goto QS4;
+
+ case OP_VSPACE_EXTRA + OP_TYPESTAR:
+ case OP_VSPACE_EXTRA + OP_TYPEMINSTAR:
+ case OP_VSPACE_EXTRA + OP_TYPEPOSSTAR:
+ count = 0;
+
+ QS4:
+ ADD_ACTIVE(state_offset + 2, 0);
+ if (clen > 0)
+ {
+ BOOL OK;
+ switch (c)
+ {
+ case 0x000a:
+ case 0x000b:
+ case 0x000c:
+ case 0x000d:
+ case 0x0085:
+ case 0x2028:
+ case 0x2029:
+ OK = TRUE;
+ break;
+
+ default:
+ OK = FALSE;
+ break;
+ }
+ if (OK == (d == OP_VSPACE))
+ {
+ if (codevalue == OP_VSPACE_EXTRA + OP_TYPEPOSSTAR ||
+ codevalue == OP_VSPACE_EXTRA + OP_TYPEPOSQUERY)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ ADD_NEW_DATA(-(state_offset + count), 0, 0);
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_HSPACE_EXTRA + OP_TYPEQUERY:
+ case OP_HSPACE_EXTRA + OP_TYPEMINQUERY:
+ case OP_HSPACE_EXTRA + OP_TYPEPOSQUERY:
+ count = 2;
+ goto QS5;
+
+ case OP_HSPACE_EXTRA + OP_TYPESTAR:
+ case OP_HSPACE_EXTRA + OP_TYPEMINSTAR:
+ case OP_HSPACE_EXTRA + OP_TYPEPOSSTAR:
+ count = 0;
+
+ QS5:
+ ADD_ACTIVE(state_offset + 2, 0);
+ if (clen > 0)
+ {
+ BOOL OK;
+ switch (c)
+ {
+ case 0x09: /* HT */
+ case 0x20: /* SPACE */
+ case 0xa0: /* NBSP */
+ case 0x1680: /* OGHAM SPACE MARK */
+ case 0x180e: /* MONGOLIAN VOWEL SEPARATOR */
+ case 0x2000: /* EN QUAD */
+ case 0x2001: /* EM QUAD */
+ case 0x2002: /* EN SPACE */
+ case 0x2003: /* EM SPACE */
+ case 0x2004: /* THREE-PER-EM SPACE */
+ case 0x2005: /* FOUR-PER-EM SPACE */
+ case 0x2006: /* SIX-PER-EM SPACE */
+ case 0x2007: /* FIGURE SPACE */
+ case 0x2008: /* PUNCTUATION SPACE */
+ case 0x2009: /* THIN SPACE */
+ case 0x200A: /* HAIR SPACE */
+ case 0x202f: /* NARROW NO-BREAK SPACE */
+ case 0x205f: /* MEDIUM MATHEMATICAL SPACE */
+ case 0x3000: /* IDEOGRAPHIC SPACE */
+ OK = TRUE;
+ break;
+
+ default:
+ OK = FALSE;
+ break;
+ }
+
+ if (OK == (d == OP_HSPACE))
+ {
+ if (codevalue == OP_HSPACE_EXTRA + OP_TYPEPOSSTAR ||
+ codevalue == OP_HSPACE_EXTRA + OP_TYPEPOSQUERY)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ ADD_NEW_DATA(-(state_offset + count), 0, 0);
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+#ifdef SUPPORT_UCP
+ case OP_PROP_EXTRA + OP_TYPEEXACT:
+ case OP_PROP_EXTRA + OP_TYPEUPTO:
+ case OP_PROP_EXTRA + OP_TYPEMINUPTO:
+ case OP_PROP_EXTRA + OP_TYPEPOSUPTO:
+ if (codevalue != OP_PROP_EXTRA + OP_TYPEEXACT)
+ { ADD_ACTIVE(state_offset + 6, 0); }
+ count = current_state->count; /* Number already matched */
+ if (clen > 0)
+ {
+ BOOL OK;
+ int category = _erts_pcre_ucp_findprop(c, &chartype, &script);
+ switch(code[4])
+ {
+ case PT_ANY:
+ OK = TRUE;
+ break;
+
+ case PT_LAMP:
+ OK = chartype == ucp_Lu || chartype == ucp_Ll || chartype == ucp_Lt;
+ break;
+
+ case PT_GC:
+ OK = category == code[5];
+ break;
+
+ case PT_PC:
+ OK = chartype == code[5];
+ break;
+
+ case PT_SC:
+ OK = script == code[5];
+ break;
+
+ /* Should never occur, but keep compilers from grumbling. */
+
+ default:
+ OK = codevalue != OP_PROP;
+ break;
+ }
+
+ if (OK == (d == OP_PROP))
+ {
+ if (codevalue == OP_PROP_EXTRA + OP_TYPEPOSUPTO)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ if (++count >= GET2(code, 1))
+ { ADD_NEW(state_offset + 6, 0); }
+ else
+ { ADD_NEW(state_offset, count); }
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_EXTUNI_EXTRA + OP_TYPEEXACT:
+ case OP_EXTUNI_EXTRA + OP_TYPEUPTO:
+ case OP_EXTUNI_EXTRA + OP_TYPEMINUPTO:
+ case OP_EXTUNI_EXTRA + OP_TYPEPOSUPTO:
+ if (codevalue != OP_EXTUNI_EXTRA + OP_TYPEEXACT)
+ { ADD_ACTIVE(state_offset + 4, 0); }
+ count = current_state->count; /* Number already matched */
+ if (clen > 0 && _erts_pcre_ucp_findprop(c, &chartype, &script) != ucp_M)
+ {
+ const uschar *nptr = ptr + clen;
+ int ncount = 0;
+ if (codevalue == OP_EXTUNI_EXTRA + OP_TYPEPOSUPTO)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ while (nptr < end_subject)
+ {
+ int nd;
+ int ndlen = 1;
+ GETCHARLEN(nd, nptr, ndlen);
+ if (_erts_pcre_ucp_findprop(nd, &chartype, &script) != ucp_M) break;
+ ncount++;
+ nptr += ndlen;
+ }
+ if (++count >= GET2(code, 1))
+ { ADD_NEW_DATA(-(state_offset + 4), 0, ncount); }
+ else
+ { ADD_NEW_DATA(-state_offset, count, ncount); }
+ }
+ break;
+#endif
+
+ /*-----------------------------------------------------------------*/
+ case OP_ANYNL_EXTRA + OP_TYPEEXACT:
+ case OP_ANYNL_EXTRA + OP_TYPEUPTO:
+ case OP_ANYNL_EXTRA + OP_TYPEMINUPTO:
+ case OP_ANYNL_EXTRA + OP_TYPEPOSUPTO:
+ if (codevalue != OP_ANYNL_EXTRA + OP_TYPEEXACT)
+ { ADD_ACTIVE(state_offset + 4, 0); }
+ count = current_state->count; /* Number already matched */
+ if (clen > 0)
+ {
+ int ncount = 0;
+ switch (c)
+ {
+ case 0x000b:
+ case 0x000c:
+ case 0x0085:
+ case 0x2028:
+ case 0x2029:
+ if ((md->moptions & PCRE_BSR_ANYCRLF) != 0) break;
+ goto ANYNL03;
+
+ case 0x000d:
+ if (ptr + 1 < end_subject && ptr[1] == 0x0a) ncount = 1;
+ /* Fall through */
+
+ ANYNL03:
+ case 0x000a:
+ if (codevalue == OP_ANYNL_EXTRA + OP_TYPEPOSUPTO)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ if (++count >= GET2(code, 1))
+ { ADD_NEW_DATA(-(state_offset + 4), 0, ncount); }
+ else
+ { ADD_NEW_DATA(-state_offset, count, ncount); }
+ break;
+
+ default:
+ break;
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_VSPACE_EXTRA + OP_TYPEEXACT:
+ case OP_VSPACE_EXTRA + OP_TYPEUPTO:
+ case OP_VSPACE_EXTRA + OP_TYPEMINUPTO:
+ case OP_VSPACE_EXTRA + OP_TYPEPOSUPTO:
+ if (codevalue != OP_VSPACE_EXTRA + OP_TYPEEXACT)
+ { ADD_ACTIVE(state_offset + 4, 0); }
+ count = current_state->count; /* Number already matched */
+ if (clen > 0)
+ {
+ BOOL OK;
+ switch (c)
+ {
+ case 0x000a:
+ case 0x000b:
+ case 0x000c:
+ case 0x000d:
+ case 0x0085:
+ case 0x2028:
+ case 0x2029:
+ OK = TRUE;
+ break;
+
+ default:
+ OK = FALSE;
+ }
+
+ if (OK == (d == OP_VSPACE))
+ {
+ if (codevalue == OP_VSPACE_EXTRA + OP_TYPEPOSUPTO)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ if (++count >= GET2(code, 1))
+ { ADD_NEW_DATA(-(state_offset + 4), 0, 0); }
+ else
+ { ADD_NEW_DATA(-state_offset, count, 0); }
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_HSPACE_EXTRA + OP_TYPEEXACT:
+ case OP_HSPACE_EXTRA + OP_TYPEUPTO:
+ case OP_HSPACE_EXTRA + OP_TYPEMINUPTO:
+ case OP_HSPACE_EXTRA + OP_TYPEPOSUPTO:
+ if (codevalue != OP_HSPACE_EXTRA + OP_TYPEEXACT)
+ { ADD_ACTIVE(state_offset + 4, 0); }
+ count = current_state->count; /* Number already matched */
+ if (clen > 0)
+ {
+ BOOL OK;
+ switch (c)
+ {
+ case 0x09: /* HT */
+ case 0x20: /* SPACE */
+ case 0xa0: /* NBSP */
+ case 0x1680: /* OGHAM SPACE MARK */
+ case 0x180e: /* MONGOLIAN VOWEL SEPARATOR */
+ case 0x2000: /* EN QUAD */
+ case 0x2001: /* EM QUAD */
+ case 0x2002: /* EN SPACE */
+ case 0x2003: /* EM SPACE */
+ case 0x2004: /* THREE-PER-EM SPACE */
+ case 0x2005: /* FOUR-PER-EM SPACE */
+ case 0x2006: /* SIX-PER-EM SPACE */
+ case 0x2007: /* FIGURE SPACE */
+ case 0x2008: /* PUNCTUATION SPACE */
+ case 0x2009: /* THIN SPACE */
+ case 0x200A: /* HAIR SPACE */
+ case 0x202f: /* NARROW NO-BREAK SPACE */
+ case 0x205f: /* MEDIUM MATHEMATICAL SPACE */
+ case 0x3000: /* IDEOGRAPHIC SPACE */
+ OK = TRUE;
+ break;
+
+ default:
+ OK = FALSE;
+ break;
+ }
+
+ if (OK == (d == OP_HSPACE))
+ {
+ if (codevalue == OP_HSPACE_EXTRA + OP_TYPEPOSUPTO)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ if (++count >= GET2(code, 1))
+ { ADD_NEW_DATA(-(state_offset + 4), 0, 0); }
+ else
+ { ADD_NEW_DATA(-state_offset, count, 0); }
+ }
+ }
+ break;
+
+/* ========================================================================== */
+ /* These opcodes are followed by a character that is usually compared
+ to the current subject character; it is loaded into d. We still get
+ here even if there is no subject character, because in some cases zero
+ repetitions are permitted. */
+
+ /*-----------------------------------------------------------------*/
+ case OP_CHAR:
+ if (clen > 0 && c == d) { ADD_NEW(state_offset + dlen + 1, 0); }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_CHARNC:
+ if (clen == 0) break;
+
+#ifdef SUPPORT_UTF8
+ if (utf8)
+ {
+ if (c == d) { ADD_NEW(state_offset + dlen + 1, 0); } else
+ {
+ unsigned int othercase;
+ if (c < 128) othercase = fcc[c]; else
+
+ /* If we have Unicode property support, we can use it to test the
+ other case of the character. */
+
+#ifdef SUPPORT_UCP
+ othercase = _erts_pcre_ucp_othercase(c);
+#else
+ othercase = NOTACHAR;
+#endif
+
+ if (d == othercase) { ADD_NEW(state_offset + dlen + 1, 0); }
+ }
+ }
+ else
+#endif /* SUPPORT_UTF8 */
+
+ /* Non-UTF-8 mode */
+ {
+ if (lcc[c] == lcc[d]) { ADD_NEW(state_offset + 2, 0); }
+ }
+ break;
+
+
+#ifdef SUPPORT_UCP
+ /*-----------------------------------------------------------------*/
+ /* This is a tricky one because it can match more than one character.
+ Find out how many characters to skip, and then set up a negative state
+ to wait for them to pass before continuing. */
+
+ case OP_EXTUNI:
+ if (clen > 0 && _erts_pcre_ucp_findprop(c, &chartype, &script) != ucp_M)
+ {
+ const uschar *nptr = ptr + clen;
+ int ncount = 0;
+ while (nptr < end_subject)
+ {
+ int nclen = 1;
+ GETCHARLEN(c, nptr, nclen);
+ if (_erts_pcre_ucp_findprop(c, &chartype, &script) != ucp_M) break;
+ ncount++;
+ nptr += nclen;
+ }
+ ADD_NEW_DATA(-(state_offset + 1), 0, ncount);
+ }
+ break;
+#endif
+
+ /*-----------------------------------------------------------------*/
+ /* This is a tricky like EXTUNI because it too can match more than one
+ character (when CR is followed by LF). In this case, set up a negative
+ state to wait for one character to pass before continuing. */
+
+ case OP_ANYNL:
+ if (clen > 0) switch(c)
+ {
+ case 0x000b:
+ case 0x000c:
+ case 0x0085:
+ case 0x2028:
+ case 0x2029:
+ if ((md->moptions & PCRE_BSR_ANYCRLF) != 0) break;
+
+ case 0x000a:
+ ADD_NEW(state_offset + 1, 0);
+ break;
+
+ case 0x000d:
+ if (ptr + 1 < end_subject && ptr[1] == 0x0a)
+ {
+ ADD_NEW_DATA(-(state_offset + 1), 0, 1);
+ }
+ else
+ {
+ ADD_NEW(state_offset + 1, 0);
+ }
+ break;
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_NOT_VSPACE:
+ if (clen > 0) switch(c)
+ {
+ case 0x000a:
+ case 0x000b:
+ case 0x000c:
+ case 0x000d:
+ case 0x0085:
+ case 0x2028:
+ case 0x2029:
+ break;
+
+ default:
+ ADD_NEW(state_offset + 1, 0);
+ break;
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_VSPACE:
+ if (clen > 0) switch(c)
+ {
+ case 0x000a:
+ case 0x000b:
+ case 0x000c:
+ case 0x000d:
+ case 0x0085:
+ case 0x2028:
+ case 0x2029:
+ ADD_NEW(state_offset + 1, 0);
+ break;
+
+ default: break;
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_NOT_HSPACE:
+ if (clen > 0) switch(c)
+ {
+ case 0x09: /* HT */
+ case 0x20: /* SPACE */
+ case 0xa0: /* NBSP */
+ case 0x1680: /* OGHAM SPACE MARK */
+ case 0x180e: /* MONGOLIAN VOWEL SEPARATOR */
+ case 0x2000: /* EN QUAD */
+ case 0x2001: /* EM QUAD */
+ case 0x2002: /* EN SPACE */
+ case 0x2003: /* EM SPACE */
+ case 0x2004: /* THREE-PER-EM SPACE */
+ case 0x2005: /* FOUR-PER-EM SPACE */
+ case 0x2006: /* SIX-PER-EM SPACE */
+ case 0x2007: /* FIGURE SPACE */
+ case 0x2008: /* PUNCTUATION SPACE */
+ case 0x2009: /* THIN SPACE */
+ case 0x200A: /* HAIR SPACE */
+ case 0x202f: /* NARROW NO-BREAK SPACE */
+ case 0x205f: /* MEDIUM MATHEMATICAL SPACE */
+ case 0x3000: /* IDEOGRAPHIC SPACE */
+ break;
+
+ default:
+ ADD_NEW(state_offset + 1, 0);
+ break;
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_HSPACE:
+ if (clen > 0) switch(c)
+ {
+ case 0x09: /* HT */
+ case 0x20: /* SPACE */
+ case 0xa0: /* NBSP */
+ case 0x1680: /* OGHAM SPACE MARK */
+ case 0x180e: /* MONGOLIAN VOWEL SEPARATOR */
+ case 0x2000: /* EN QUAD */
+ case 0x2001: /* EM QUAD */
+ case 0x2002: /* EN SPACE */
+ case 0x2003: /* EM SPACE */
+ case 0x2004: /* THREE-PER-EM SPACE */
+ case 0x2005: /* FOUR-PER-EM SPACE */
+ case 0x2006: /* SIX-PER-EM SPACE */
+ case 0x2007: /* FIGURE SPACE */
+ case 0x2008: /* PUNCTUATION SPACE */
+ case 0x2009: /* THIN SPACE */
+ case 0x200A: /* HAIR SPACE */
+ case 0x202f: /* NARROW NO-BREAK SPACE */
+ case 0x205f: /* MEDIUM MATHEMATICAL SPACE */
+ case 0x3000: /* IDEOGRAPHIC SPACE */
+ ADD_NEW(state_offset + 1, 0);
+ break;
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ /* Match a negated single character. This is only used for one-byte
+ characters, that is, we know that d < 256. The character we are
+ checking (c) can be multibyte. */
+
+ case OP_NOT:
+ if (clen > 0)
+ {
+ unsigned int otherd = ((ims & PCRE_CASELESS) != 0)? fcc[d] : d;
+ if (c != d && c != otherd) { ADD_NEW(state_offset + dlen + 1, 0); }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_PLUS:
+ case OP_MINPLUS:
+ case OP_POSPLUS:
+ case OP_NOTPLUS:
+ case OP_NOTMINPLUS:
+ case OP_NOTPOSPLUS:
+ count = current_state->count; /* Already matched */
+ if (count > 0) { ADD_ACTIVE(state_offset + dlen + 1, 0); }
+ if (clen > 0)
+ {
+ unsigned int otherd = NOTACHAR;
+ if ((ims & PCRE_CASELESS) != 0)
+ {
+#ifdef SUPPORT_UTF8
+ if (utf8 && d >= 128)
+ {
+#ifdef SUPPORT_UCP
+ otherd = _erts_pcre_ucp_othercase(d);
+#endif /* SUPPORT_UCP */
+ }
+ else
+#endif /* SUPPORT_UTF8 */
+ otherd = fcc[d];
+ }
+ if ((c == d || c == otherd) == (codevalue < OP_NOTSTAR))
+ {
+ if (count > 0 &&
+ (codevalue == OP_POSPLUS || codevalue == OP_NOTPOSPLUS))
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ count++;
+ ADD_NEW(state_offset, count);
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_QUERY:
+ case OP_MINQUERY:
+ case OP_POSQUERY:
+ case OP_NOTQUERY:
+ case OP_NOTMINQUERY:
+ case OP_NOTPOSQUERY:
+ ADD_ACTIVE(state_offset + dlen + 1, 0);
+ if (clen > 0)
+ {
+ unsigned int otherd = NOTACHAR;
+ if ((ims & PCRE_CASELESS) != 0)
+ {
+#ifdef SUPPORT_UTF8
+ if (utf8 && d >= 128)
+ {
+#ifdef SUPPORT_UCP
+ otherd = _erts_pcre_ucp_othercase(d);
+#endif /* SUPPORT_UCP */
+ }
+ else
+#endif /* SUPPORT_UTF8 */
+ otherd = fcc[d];
+ }
+ if ((c == d || c == otherd) == (codevalue < OP_NOTSTAR))
+ {
+ if (codevalue == OP_POSQUERY || codevalue == OP_NOTPOSQUERY)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ ADD_NEW(state_offset + dlen + 1, 0);
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_STAR:
+ case OP_MINSTAR:
+ case OP_POSSTAR:
+ case OP_NOTSTAR:
+ case OP_NOTMINSTAR:
+ case OP_NOTPOSSTAR:
+ ADD_ACTIVE(state_offset + dlen + 1, 0);
+ if (clen > 0)
+ {
+ unsigned int otherd = NOTACHAR;
+ if ((ims & PCRE_CASELESS) != 0)
+ {
+#ifdef SUPPORT_UTF8
+ if (utf8 && d >= 128)
+ {
+#ifdef SUPPORT_UCP
+ otherd = _erts_pcre_ucp_othercase(d);
+#endif /* SUPPORT_UCP */
+ }
+ else
+#endif /* SUPPORT_UTF8 */
+ otherd = fcc[d];
+ }
+ if ((c == d || c == otherd) == (codevalue < OP_NOTSTAR))
+ {
+ if (codevalue == OP_POSSTAR || codevalue == OP_NOTPOSSTAR)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ ADD_NEW(state_offset, 0);
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_EXACT:
+ case OP_NOTEXACT:
+ count = current_state->count; /* Number already matched */
+ if (clen > 0)
+ {
+ unsigned int otherd = NOTACHAR;
+ if ((ims & PCRE_CASELESS) != 0)
+ {
+#ifdef SUPPORT_UTF8
+ if (utf8 && d >= 128)
+ {
+#ifdef SUPPORT_UCP
+ otherd = _erts_pcre_ucp_othercase(d);
+#endif /* SUPPORT_UCP */
+ }
+ else
+#endif /* SUPPORT_UTF8 */
+ otherd = fcc[d];
+ }
+ if ((c == d || c == otherd) == (codevalue < OP_NOTSTAR))
+ {
+ if (++count >= GET2(code, 1))
+ { ADD_NEW(state_offset + dlen + 3, 0); }
+ else
+ { ADD_NEW(state_offset, count); }
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_UPTO:
+ case OP_MINUPTO:
+ case OP_POSUPTO:
+ case OP_NOTUPTO:
+ case OP_NOTMINUPTO:
+ case OP_NOTPOSUPTO:
+ ADD_ACTIVE(state_offset + dlen + 3, 0);
+ count = current_state->count; /* Number already matched */
+ if (clen > 0)
+ {
+ unsigned int otherd = NOTACHAR;
+ if ((ims & PCRE_CASELESS) != 0)
+ {
+#ifdef SUPPORT_UTF8
+ if (utf8 && d >= 128)
+ {
+#ifdef SUPPORT_UCP
+ otherd = _erts_pcre_ucp_othercase(d);
+#endif /* SUPPORT_UCP */
+ }
+ else
+#endif /* SUPPORT_UTF8 */
+ otherd = fcc[d];
+ }
+ if ((c == d || c == otherd) == (codevalue < OP_NOTSTAR))
+ {
+ if (codevalue == OP_POSUPTO || codevalue == OP_NOTPOSUPTO)
+ {
+ active_count--; /* Remove non-match possibility */
+ next_active_state--;
+ }
+ if (++count >= GET2(code, 1))
+ { ADD_NEW(state_offset + dlen + 3, 0); }
+ else
+ { ADD_NEW(state_offset, count); }
+ }
+ }
+ break;
+
+
+/* ========================================================================== */
+ /* These are the class-handling opcodes */
+
+ case OP_CLASS:
+ case OP_NCLASS:
+ case OP_XCLASS:
+ {
+ BOOL isinclass = FALSE;
+ int next_state_offset;
+ const uschar *ecode;
+
+ /* For a simple class, there is always just a 32-byte table, and we
+ can set isinclass from it. */
+
+ if (codevalue != OP_XCLASS)
+ {
+ ecode = code + 33;
+ if (clen > 0)
+ {
+ isinclass = (c > 255)? (codevalue == OP_NCLASS) :
+ ((code[1 + c/8] & (1 << (c&7))) != 0);
+ }
+ }
+
+ /* An extended class may have a table or a list of single characters,
+ ranges, or both, and it may be positive or negative. There's a
+ function that sorts all this out. */
+
+ else
+ {
+ ecode = code + GET(code, 1);
+ if (clen > 0) isinclass = _erts_pcre_xclass(c, code + 1 + LINK_SIZE);
+ }
+
+ /* At this point, isinclass is set for all kinds of class, and ecode
+ points to the byte after the end of the class. If there is a
+ quantifier, this is where it will be. */
+
+ next_state_offset = ecode - start_code;
+
+ switch (*ecode)
+ {
+ case OP_CRSTAR:
+ case OP_CRMINSTAR:
+ ADD_ACTIVE(next_state_offset + 1, 0);
+ if (isinclass) { ADD_NEW(state_offset, 0); }
+ break;
+
+ case OP_CRPLUS:
+ case OP_CRMINPLUS:
+ count = current_state->count; /* Already matched */
+ if (count > 0) { ADD_ACTIVE(next_state_offset + 1, 0); }
+ if (isinclass) { count++; ADD_NEW(state_offset, count); }
+ break;
+
+ case OP_CRQUERY:
+ case OP_CRMINQUERY:
+ ADD_ACTIVE(next_state_offset + 1, 0);
+ if (isinclass) { ADD_NEW(next_state_offset + 1, 0); }
+ break;
+
+ case OP_CRRANGE:
+ case OP_CRMINRANGE:
+ count = current_state->count; /* Already matched */
+ if (count >= GET2(ecode, 1))
+ { ADD_ACTIVE(next_state_offset + 5, 0); }
+ if (isinclass)
+ {
+ int max = GET2(ecode, 3);
+ if (++count >= max && max != 0) /* Max 0 => no limit */
+ { ADD_NEW(next_state_offset + 5, 0); }
+ else
+ { ADD_NEW(state_offset, count); }
+ }
+ break;
+
+ default:
+ if (isinclass) { ADD_NEW(next_state_offset, 0); }
+ break;
+ }
+ }
+ break;
+
+/* ========================================================================== */
+ /* These are the opcodes for fancy brackets of various kinds. We have
+ to use recursion in order to handle them. */
+
+ case OP_ASSERT:
+ case OP_ASSERT_NOT:
+ case OP_ASSERTBACK:
+ case OP_ASSERTBACK_NOT:
+ {
+ int rc;
+ int local_offsets[2];
+ int local_workspace[1000];
+ const uschar *endasscode = code + GET(code, 1);
+
+ while (*endasscode == OP_ALT) endasscode += GET(endasscode, 1);
+
+ rc = internal_dfa_exec(
+ md, /* static match data */
+ code, /* this subexpression's code */
+ ptr, /* where we currently are */
+ ptr - start_subject, /* start offset */
+ local_offsets, /* offset vector */
+ sizeof(local_offsets)/sizeof(int), /* size of same */
+ local_workspace, /* workspace vector */
+ sizeof(local_workspace)/sizeof(int), /* size of same */
+ ims, /* the current ims flags */
+ rlevel, /* function recursion level */
+ recursing); /* pass on regex recursion */
+
+ if ((rc >= 0) == (codevalue == OP_ASSERT || codevalue == OP_ASSERTBACK))
+ { ADD_ACTIVE(endasscode + LINK_SIZE + 1 - start_code, 0); }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_COND:
+ case OP_SCOND:
+ {
+ int local_offsets[1000];
+ int local_workspace[1000];
+ int condcode = code[LINK_SIZE+1];
+
+ /* Back reference conditions are not supported */
+
+ if (condcode == OP_CREF) return PCRE_ERROR_DFA_UCOND;
+
+ /* The DEFINE condition is always false */
+
+ if (condcode == OP_DEF)
+ {
+ ADD_ACTIVE(state_offset + GET(code, 1) + LINK_SIZE + 1, 0);
+ }
+
+ /* The only supported version of OP_RREF is for the value RREF_ANY,
+ which means "test if in any recursion". We can't test for specifically
+ recursed groups. */
+
+ else if (condcode == OP_RREF)
+ {
+ int value = GET2(code, LINK_SIZE+2);
+ if (value != RREF_ANY) return PCRE_ERROR_DFA_UCOND;
+ if (recursing > 0) { ADD_ACTIVE(state_offset + LINK_SIZE + 4, 0); }
+ else { ADD_ACTIVE(state_offset + GET(code, 1) + LINK_SIZE + 1, 0); }
+ }
+
+ /* Otherwise, the condition is an assertion */
+
+ else
+ {
+ int rc;
+ const uschar *asscode = code + LINK_SIZE + 1;
+ const uschar *endasscode = asscode + GET(asscode, 1);
+
+ while (*endasscode == OP_ALT) endasscode += GET(endasscode, 1);
+
+ rc = internal_dfa_exec(
+ md, /* fixed match data */
+ asscode, /* this subexpression's code */
+ ptr, /* where we currently are */
+ ptr - start_subject, /* start offset */
+ local_offsets, /* offset vector */
+ sizeof(local_offsets)/sizeof(int), /* size of same */
+ local_workspace, /* workspace vector */
+ sizeof(local_workspace)/sizeof(int), /* size of same */
+ ims, /* the current ims flags */
+ rlevel, /* function recursion level */
+ recursing); /* pass on regex recursion */
+
+ if ((rc >= 0) ==
+ (condcode == OP_ASSERT || condcode == OP_ASSERTBACK))
+ { ADD_ACTIVE(endasscode + LINK_SIZE + 1 - start_code, 0); }
+ else
+ { ADD_ACTIVE(state_offset + GET(code, 1) + LINK_SIZE + 1, 0); }
+ }
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_RECURSE:
+ {
+ int local_offsets[1000];
+ int local_workspace[1000];
+ int rc;
+
+ DPRINTF(("%.*sStarting regex recursion %d\n", rlevel*2-2, SP,
+ recursing + 1));
+
+ rc = internal_dfa_exec(
+ md, /* fixed match data */
+ start_code + GET(code, 1), /* this subexpression's code */
+ ptr, /* where we currently are */
+ ptr - start_subject, /* start offset */
+ local_offsets, /* offset vector */
+ sizeof(local_offsets)/sizeof(int), /* size of same */
+ local_workspace, /* workspace vector */
+ sizeof(local_workspace)/sizeof(int), /* size of same */
+ ims, /* the current ims flags */
+ rlevel, /* function recursion level */
+ recursing + 1); /* regex recurse level */
+
+ DPRINTF(("%.*sReturn from regex recursion %d: rc=%d\n", rlevel*2-2, SP,
+ recursing + 1, rc));
+
+ /* Ran out of internal offsets */
+
+ if (rc == 0) return PCRE_ERROR_DFA_RECURSE;
+
+ /* For each successful matched substring, set up the next state with a
+ count of characters to skip before trying it. Note that the count is in
+ characters, not bytes. */
+
+ if (rc > 0)
+ {
+ for (rc = rc*2 - 2; rc >= 0; rc -= 2)
+ {
+ const uschar *p = start_subject + local_offsets[rc];
+ const uschar *pp = start_subject + local_offsets[rc+1];
+ int charcount = local_offsets[rc+1] - local_offsets[rc];
+ while (p < pp) if ((*p++ & 0xc0) == 0x80) charcount--;
+ if (charcount > 0)
+ {
+ ADD_NEW_DATA(-(state_offset + LINK_SIZE + 1), 0, (charcount - 1));
+ }
+ else
+ {
+ ADD_ACTIVE(state_offset + LINK_SIZE + 1, 0);
+ }
+ }
+ }
+ else if (rc != PCRE_ERROR_NOMATCH) return rc;
+ }
+ break;
+
+ /*-----------------------------------------------------------------*/
+ case OP_ONCE:
+ {
+ int local_offsets[2];
+ int local_workspace[1000];
+
+ int rc = internal_dfa_exec(
+ md, /* fixed match data */
+ code, /* this subexpression's code */
+ ptr, /* where we currently are */
+ ptr - start_subject, /* start offset */
+ local_offsets, /* offset vector */
+ sizeof(local_offsets)/sizeof(int), /* size of same */
+ local_workspace, /* workspace vector */
+ sizeof(local_workspace)/sizeof(int), /* size of same */
+ ims, /* the current ims flags */
+ rlevel, /* function recursion level */
+ recursing); /* pass on regex recursion */
+
+ if (rc >= 0)
+ {
+ const uschar *end_subpattern = code;
+ int charcount = local_offsets[1] - local_offsets[0];
+ int next_state_offset, repeat_state_offset;
+
+ do { end_subpattern += GET(end_subpattern, 1); }
+ while (*end_subpattern == OP_ALT);
+ next_state_offset = end_subpattern - start_code + LINK_SIZE + 1;
+
+ /* If the end of this subpattern is KETRMAX or KETRMIN, we must
+ arrange for the repeat state also to be added to the relevant list.
+ Calculate the offset, or set -1 for no repeat. */
+
+ repeat_state_offset = (*end_subpattern == OP_KETRMAX ||
+ *end_subpattern == OP_KETRMIN)?
+ end_subpattern - start_code - GET(end_subpattern, 1) : -1;
+
+ /* If we have matched an empty string, add the next state at the
+ current character pointer. This is important so that the duplicate
+ checking kicks in, which is what breaks infinite loops that match an
+ empty string. */
+
+ if (charcount == 0)
+ {
+ ADD_ACTIVE(next_state_offset, 0);
+ }
+
+ /* Optimization: if there are no more active states, and there
+ are no new states yet set up, then skip over the subject string
+ right here, to save looping. Otherwise, set up the new state to swing
+ into action when the end of the substring is reached. */
+
+ else if (i + 1 >= active_count && new_count == 0)
+ {
+ ptr += charcount;
+ clen = 0;
+ ADD_NEW(next_state_offset, 0);
+
+ /* If we are adding a repeat state at the new character position,
+ we must fudge things so that it is the only current state.
+ Otherwise, it might be a duplicate of one we processed before, and
+ that would cause it to be skipped. */
+
+ if (repeat_state_offset >= 0)
+ {
+ next_active_state = active_states;
+ active_count = 0;
+ i = -1;
+ ADD_ACTIVE(repeat_state_offset, 0);
+ }
+ }
+ else
+ {
+ const uschar *p = start_subject + local_offsets[0];
+ const uschar *pp = start_subject + local_offsets[1];
+ while (p < pp) if ((*p++ & 0xc0) == 0x80) charcount--;
+ ADD_NEW_DATA(-next_state_offset, 0, (charcount - 1));
+ if (repeat_state_offset >= 0)
+ { ADD_NEW_DATA(-repeat_state_offset, 0, (charcount - 1)); }
+ }
+
+ }
+ else if (rc != PCRE_ERROR_NOMATCH) return rc;
+ }
+ break;
+
+
+/* ========================================================================== */
+ /* Handle callouts */
+
+ case OP_CALLOUT:
+ if (erts_pcre_callout != NULL)
+ {
+ int rrc;
+ pcre_callout_block cb;
+ cb.version = 1; /* Version 1 of the callout block */
+ cb.callout_number = code[1];
+ cb.offset_vector = offsets;
+ cb.subject = (PCRE_SPTR)start_subject;
+ cb.subject_length = end_subject - start_subject;
+ cb.start_match = current_subject - start_subject;
+ cb.current_position = ptr - start_subject;
+ cb.pattern_position = GET(code, 2);
+ cb.next_item_length = GET(code, 2 + LINK_SIZE);
+ cb.capture_top = 1;
+ cb.capture_last = -1;
+ cb.callout_data = md->callout_data;
+ if ((rrc = (*erts_pcre_callout)(&cb)) < 0) return rrc; /* Abandon */
+ if (rrc == 0) { ADD_ACTIVE(state_offset + 2 + 2*LINK_SIZE, 0); }
+ }
+ break;
+
+
+/* ========================================================================== */
+ default: /* Unsupported opcode */
+ return PCRE_ERROR_DFA_UITEM;
+ }
+
+ NEXT_ACTIVE_STATE: continue;
+
+ } /* End of loop scanning active states */
+
+ /* We have finished the processing at the current subject character. If no
+ new states have been set for the next character, we have found all the
+ matches that we are going to find. If we are at the top level and partial
+ matching has been requested, check for appropriate conditions. */
+
+ if (new_count <= 0)
+ {
+ if (match_count < 0 && /* No matches found */
+ rlevel == 1 && /* Top level match function */
+ (md->moptions & PCRE_PARTIAL) != 0 && /* Want partial matching */
+ ptr >= end_subject && /* Reached end of subject */
+ ptr > current_subject) /* Matched non-empty string */
+ {
+ if (offsetcount >= 2)
+ {
+ offsets[0] = current_subject - start_subject;
+ offsets[1] = end_subject - start_subject;
+ }
+ match_count = PCRE_ERROR_PARTIAL;
+ }
+
+ DPRINTF(("%.*sEnd of internal_dfa_exec %d: returning %d\n"
+ "%.*s---------------------\n\n", rlevel*2-2, SP, rlevel, match_count,
+ rlevel*2-2, SP));
+ break; /* In effect, "return", but see the comment below */
+ }
+
+ /* One or more states are active for the next character. */
+
+ ptr += clen; /* Advance to next subject character */
+ } /* Loop to move along the subject string */
+
+/* Control gets here from "break" a few lines above. We do it this way because
+if we use "return" above, we have compiler trouble. Some compilers warn if
+there's nothing here because they think the function doesn't return a value. On
+the other hand, if we put a dummy statement here, some more clever compilers
+complain that it can't be reached. Sigh. */
+
+return match_count;
+}
+
+
+
+
+/*************************************************
+* Execute a Regular Expression - DFA engine *
+*************************************************/
+
+/* This external function applies a compiled re to a subject string using a DFA
+engine. This function calls the internal function multiple times if the pattern
+is not anchored.
+
+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 vector of match offsets
+ offsetcount size of same
+ workspace workspace vector
+ wscount size of same
+
+Returns: > 0 => number of match offset pairs placed in offsets
+ = 0 => offsets overflowed; longest matches are present
+ -1 => failed to match
+ < -1 => some kind of unexpected problem
+*/
+
+PCRE_EXP_DEFN int
+erts_pcre_dfa_exec(const pcre *argument_re, const pcre_extra *extra_data,
+ const char *subject, int length, int start_offset, int options, int *offsets,
+ int offsetcount, int *workspace, int wscount)
+{
+real_pcre *re = (real_pcre *)argument_re;
+dfa_match_data match_block;
+dfa_match_data *md = &match_block;
+BOOL utf8, anchored, startline, firstline;
+const uschar *current_subject, *end_subject, *lcc;
+
+pcre_study_data internal_study;
+const pcre_study_data *study = NULL;
+real_pcre internal_re;
+
+const uschar *req_byte_ptr;
+const uschar *start_bits = NULL;
+BOOL first_byte_caseless = FALSE;
+BOOL req_byte_caseless = FALSE;
+int first_byte = -1;
+int req_byte = -1;
+int req_byte2 = -1;
+int newline;
+
+/* Plausibility checks */
+
+if ((options & ~PUBLIC_DFA_EXEC_OPTIONS) != 0) return PCRE_ERROR_BADOPTION;
+if (re == NULL || subject == NULL || workspace == NULL ||
+ (offsets == NULL && offsetcount > 0)) return PCRE_ERROR_NULL;
+if (offsetcount < 0) return PCRE_ERROR_BADCOUNT;
+if (wscount < 20) return PCRE_ERROR_DFA_WSSIZE;
+
+/* We need to find the pointer to any study data before we test for byte
+flipping, so we scan the extra_data block first. This may set two fields in the
+match block, so we must initialize them beforehand. However, the other fields
+in the match block must not be set until after the byte flipping. */
+
+md->tables = re->tables;
+md->callout_data = NULL;
+
+if (extra_data != NULL)
+ {
+ 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) return PCRE_ERROR_DFA_UMLIMIT;
+ if ((flags & PCRE_EXTRA_MATCH_LIMIT_RECURSION) != 0)
+ return PCRE_ERROR_DFA_UMLIMIT;
+ if ((flags & PCRE_EXTRA_CALLOUT_DATA) != 0)
+ md->callout_data = extra_data->callout_data;
+ if ((flags & PCRE_EXTRA_TABLES) != 0)
+ md->tables = extra_data->tables;
+ }
+
+/* Check that the first field in the block is the magic number. If it is not,
+test for a regex that was compiled on a host of opposite endianness. If this is
+the case, flipped values are put in internal_re and internal_study if there was
+study data too. */
+
+if (re->magic_number != MAGIC_NUMBER)
+ {
+ re = _erts_pcre_try_flipped(re, &internal_re, study, &internal_study);
+ if (re == NULL) return PCRE_ERROR_BADMAGIC;
+ if (study != NULL) study = &internal_study;
+ }
+
+/* Set some local values */
+
+current_subject = (const unsigned char *)subject + start_offset;
+end_subject = (const unsigned char *)subject + length;
+req_byte_ptr = current_subject - 1;
+
+#ifdef SUPPORT_UTF8
+utf8 = (re->options & PCRE_UTF8) != 0;
+#else
+utf8 = FALSE;
+#endif
+
+anchored = (options & (PCRE_ANCHORED|PCRE_DFA_RESTART)) != 0 ||
+ (re->options & PCRE_ANCHORED) != 0;
+
+/* The remaining fixed data for passing around. */
+
+md->start_code = (const uschar *)argument_re +
+ re->name_table_offset + re->name_count * re->name_entry_size;
+md->start_subject = (const unsigned char *)subject;
+md->end_subject = end_subject;
+md->moptions = options;
+md->poptions = re->options;
+
+/* If the BSR option is not set at match time, copy what was set
+at compile time. */
+
+if ((md->moptions & (PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE)) == 0)
+ {
+ if ((re->options & (PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE)) != 0)
+ md->moptions |= re->options & (PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE);
+#ifdef BSR_ANYCRLF
+ else md->moptions |= PCRE_BSR_ANYCRLF;
+#endif
+ }
+
+/* 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 = '\r'; break;
+ case PCRE_NEWLINE_LF: newline = '\n'; break;
+ case PCRE_NEWLINE_CR+
+ PCRE_NEWLINE_LF: newline = ('\r' << 8) | '\n'; 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;
+ }
+ }
+
+/* Check a UTF-8 string if required. Unfortunately there's no way of passing
+back the character offset. */
+
+#ifdef SUPPORT_UTF8
+if (utf8 && (options & PCRE_NO_UTF8_CHECK) == 0)
+ {
+ if (_erts_pcre_valid_utf8((uschar *)subject, length) >= 0)
+ return PCRE_ERROR_BADUTF8;
+ if (start_offset > 0 && start_offset < length)
+ {
+ int tb = ((uschar *)subject)[start_offset];
+ if (tb > 127)
+ {
+ tb &= 0xc0;
+ if (tb != 0 && tb != 0xc0) return PCRE_ERROR_BADUTF8_OFFSET;
+ }
+ }
+ }
+#endif
+
+/* 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 (md->tables == NULL) md->tables = _erts_pcre_default_tables;
+
+/* The lower casing table and the "must be at the start of a line" flag are
+used in a loop when finding where to start. */
+
+lcc = md->tables + lcc_offset;
+startline = (re->flags & PCRE_STARTLINE) != 0;
+firstline = (re->options & PCRE_FIRSTLINE) != 0;
+
+/* Set up the first character to match, if available. The first_byte 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)
+ {
+ first_byte = re->first_byte & 255;
+ if ((first_byte_caseless = ((re->first_byte & REQ_CASELESS) != 0)) == TRUE)
+ first_byte = lcc[first_byte];
+ }
+ else
+ {
+ if (startline && study != NULL &&
+ (study->options & 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)
+ {
+ req_byte = re->req_byte & 255;
+ req_byte_caseless = (re->req_byte & REQ_CASELESS) != 0;
+ req_byte2 = (md->tables + fcc_offset)[req_byte]; /* case flipped */
+ }
+
+/* Call the main matching function, looping for a non-anchored regex after a
+failed match. Unless restarting, optimize by moving to the first match
+character if possible, when not anchored. Then unless wanting a partial match,
+check for a required later character. */
+
+for (;;)
+ {
+ int rc;
+
+ if ((options & PCRE_DFA_RESTART) == 0)
+ {
+ const uschar *save_end_subject = end_subject;
+
+ /* Advance to a unique first char if possible. If firstline is TRUE, the
+ start of the match is constrained to the first line of a multiline string.
+ 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)
+ {
+ const uschar *t = current_subject;
+ while (t < md->end_subject && !IS_NEWLINE(t)) t++;
+ end_subject = t;
+ }
+
+ if (first_byte >= 0)
+ {
+ if (first_byte_caseless)
+ while (current_subject < end_subject &&
+ lcc[*current_subject] != first_byte)
+ current_subject++;
+ else
+ while (current_subject < end_subject && *current_subject != first_byte)
+ current_subject++;
+ }
+
+ /* Or to just after a linebreak for a multiline match if possible */
+
+ else if (startline)
+ {
+ if (current_subject > md->start_subject + start_offset)
+ {
+ while (current_subject <= end_subject && !WAS_NEWLINE(current_subject))
+ current_subject++;
+
+ /* 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 (current_subject[-1] == '\r' &&
+ (md->nltype == NLTYPE_ANY || md->nltype == NLTYPE_ANYCRLF) &&
+ current_subject < end_subject &&
+ *current_subject == '\n')
+ current_subject++;
+ }
+ }
+
+ /* Or to a non-unique first char after study */
+
+ else if (start_bits != NULL)
+ {
+ while (current_subject < end_subject)
+ {
+ register unsigned int c = *current_subject;
+ if ((start_bits[c/8] & (1 << (c&7))) == 0) current_subject++;
+ else break;
+ }
+ }
+
+ /* Restore fudged end_subject */
+
+ end_subject = save_end_subject;
+ }
+
+ /* If req_byte is set, we know that that character must appear in the subject
+ for the match to succeed. If the first character is set, req_byte must be
+ later in the subject; otherwise the test starts at the match point. This
+ optimization can save a huge amount of work 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 /^C/ on a 32-megabyte string... so we
+ don't do this when the string is sufficiently long.
+
+ ALSO: this processing is disabled when partial matching is requested.
+ */
+
+ if (req_byte >= 0 &&
+ end_subject - current_subject < REQ_BYTE_MAX &&
+ (options & PCRE_PARTIAL) == 0)
+ {
+ register const uschar *p = current_subject + ((first_byte >= 0)? 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_byte_ptr)
+ {
+ if (req_byte_caseless)
+ {
+ while (p < end_subject)
+ {
+ register int pp = *p++;
+ if (pp == req_byte || pp == req_byte2) { p--; break; }
+ }
+ }
+ else
+ {
+ while (p < end_subject)
+ {
+ if (*p++ == req_byte) { p--; break; }
+ }
+ }
+
+ /* If we can't find the required character, break the matching loop,
+ which will cause a return or PCRE_ERROR_NOMATCH. */
+
+ if (p >= end_subject) 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_byte_ptr = p;
+ }
+ }
+
+ /* OK, now we can do the business */
+
+ rc = internal_dfa_exec(
+ md, /* fixed match data */
+ md->start_code, /* this subexpression's code */
+ current_subject, /* where we currently are */
+ start_offset, /* start offset in subject */
+ offsets, /* offset vector */
+ offsetcount, /* size of same */
+ workspace, /* workspace vector */
+ wscount, /* size of same */
+ re->options & (PCRE_CASELESS|PCRE_MULTILINE|PCRE_DOTALL), /* ims flags */
+ 0, /* function recurse level */
+ 0); /* regex recurse level */
+
+ /* Anything other than "no match" means we are done, always; otherwise, carry
+ on only if not anchored. */
+
+ if (rc != PCRE_ERROR_NOMATCH || anchored) return rc;
+
+ /* Advance to the next subject character unless we are at the end of a line
+ and firstline is set. */
+
+ if (firstline && IS_NEWLINE(current_subject)) break;
+ current_subject++;
+ if (utf8)
+ {
+ while (current_subject < end_subject && (*current_subject & 0xc0) == 0x80)
+ current_subject++;
+ }
+ if (current_subject > 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. */
+
+ if (current_subject[-1] == '\r' &&
+ current_subject < end_subject &&
+ *current_subject == '\n' &&
+ (re->flags & PCRE_HASCRORLF) == 0 &&
+ (md->nltype == NLTYPE_ANY ||
+ md->nltype == NLTYPE_ANYCRLF ||
+ md->nllen == 2))
+ current_subject++;
+
+ } /* "Bumpalong" loop */
+
+return PCRE_ERROR_NOMATCH;
+}
+
+/* End of pcre_dfa_exec.c */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 19:03:09 +0000