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-rw-r--r--Modules/_sre.c221
1 files changed, 128 insertions, 93 deletions
diff --git a/Modules/_sre.c b/Modules/_sre.c
index 8add74e..fb8fc2a 100644
--- a/Modules/_sre.c
+++ b/Modules/_sre.c
@@ -13,8 +13,8 @@
* 00-07-08 fl added regs attribute
* 00-07-21 fl reset lastindex in scanner methods (0.9.6)
* 00-08-01 fl fixes for 1.6b1 (0.9.8)
- * 00-08-02 fl moved SRE_COUNT out of the match method
* 00-08-03 fl added recursion limit
+ * 00-08-07 fl use PyOS_CheckStack() if available
*
* Copyright (c) 1997-2000 by Secret Labs AB. All rights reserved.
*
@@ -93,8 +93,6 @@ char copyright[] = " SRE 0.9.8 Copyright (c) 1997-2000 by Secret Labs AB ";
#define TRACE(v)
#endif
-#define PTR(ptr) ((SRE_CHAR*) (ptr) - (SRE_CHAR*) state->beginning)
-
/* -------------------------------------------------------------------- */
/* search engine state */
@@ -265,7 +263,7 @@ mark_save(SRE_STATE* state, int lo, int hi)
state->mark_stack_size = newsize;
}
- TRACE(("copy %d:%d to %d\n", lo, hi, state->mark_stack_base));
+ TRACE(("copy %d:%d to %d (%d)\n", lo, hi, state->mark_stack_base, size));
memcpy(state->mark_stack + state->mark_stack_base, state->mark + lo,
size * sizeof(void*));
@@ -300,7 +298,8 @@ mark_restore(SRE_STATE* state, int lo, int hi)
#define SRE_CHAR unsigned char
#define SRE_AT sre_at
#define SRE_COUNT sre_count
-#define SRE_MEMBER sre_member
+#define SRE_CHARSET sre_charset
+#define SRE_INFO sre_info
#define SRE_MATCH sre_match
#define SRE_SEARCH sre_search
@@ -312,7 +311,8 @@ mark_restore(SRE_STATE* state, int lo, int hi)
#undef SRE_SEARCH
#undef SRE_MATCH
-#undef SRE_MEMBER
+#undef SRE_INFO
+#undef SRE_CHARSET
#undef SRE_COUNT
#undef SRE_AT
#undef SRE_CHAR
@@ -322,7 +322,8 @@ mark_restore(SRE_STATE* state, int lo, int hi)
#define SRE_CHAR Py_UNICODE
#define SRE_AT sre_uat
#define SRE_COUNT sre_ucount
-#define SRE_MEMBER sre_umember
+#define SRE_CHARSET sre_ucharset
+#define SRE_INFO sre_uinfo
#define SRE_MATCH sre_umatch
#define SRE_SEARCH sre_usearch
#endif
@@ -383,7 +384,7 @@ SRE_AT(SRE_STATE* state, SRE_CHAR* ptr, SRE_CODE at)
}
LOCAL(int)
-SRE_MEMBER(SRE_CODE* set, SRE_CODE ch)
+SRE_CHARSET(SRE_CODE* set, SRE_CODE ch)
{
/* check if character is a member of the given set */
@@ -453,6 +454,7 @@ SRE_COUNT(SRE_STATE* state, SRE_CODE* pattern, int maxcount, int level)
case SRE_OP_ANY:
/* repeated dot wildcard. */
+ TRACE(("|%p|%p|COUNT ANY\n", pattern, ptr));
while (ptr < end && !SRE_IS_LINEBREAK(*ptr))
ptr++;
break;
@@ -460,12 +462,14 @@ SRE_COUNT(SRE_STATE* state, SRE_CODE* pattern, int maxcount, int level)
case SRE_OP_ANY_ALL:
/* repeated dot wildcare. skip to the end of the target
string, and backtrack from there */
+ TRACE(("|%p|%p|COUNT ANY_ALL\n", pattern, ptr));
ptr = end;
break;
case SRE_OP_LITERAL:
/* repeated literal */
chr = pattern[1];
+ TRACE(("|%p|%p|COUNT LITERAL %d\n", pattern, ptr, chr));
while (ptr < end && (SRE_CODE) *ptr == chr)
ptr++;
break;
@@ -473,6 +477,7 @@ SRE_COUNT(SRE_STATE* state, SRE_CODE* pattern, int maxcount, int level)
case SRE_OP_LITERAL_IGNORE:
/* repeated literal */
chr = pattern[1];
+ TRACE(("|%p|%p|COUNT LITERAL_IGNORE %d\n", pattern, ptr, chr));
while (ptr < end && (SRE_CODE) state->lower(*ptr) == chr)
ptr++;
break;
@@ -480,6 +485,7 @@ SRE_COUNT(SRE_STATE* state, SRE_CODE* pattern, int maxcount, int level)
case SRE_OP_NOT_LITERAL:
/* repeated non-literal */
chr = pattern[1];
+ TRACE(("|%p|%p|COUNT NOT_LITERAL %d\n", pattern, ptr, chr));
while (ptr < end && (SRE_CODE) *ptr != chr)
ptr++;
break;
@@ -487,18 +493,21 @@ SRE_COUNT(SRE_STATE* state, SRE_CODE* pattern, int maxcount, int level)
case SRE_OP_NOT_LITERAL_IGNORE:
/* repeated non-literal */
chr = pattern[1];
+ TRACE(("|%p|%p|COUNT NOT_LITERAL_IGNORE %d\n", pattern, ptr, chr));
while (ptr < end && (SRE_CODE) state->lower(*ptr) != chr)
ptr++;
break;
case SRE_OP_IN:
/* repeated set */
- while (ptr < end && SRE_MEMBER(pattern + 2, *ptr))
+ TRACE(("|%p|%p|COUNT IN\n", pattern, ptr));
+ while (ptr < end && SRE_CHARSET(pattern + 2, *ptr))
ptr++;
break;
default:
/* repeated single character pattern */
+ TRACE(("|%p|%p|COUNT SUBPATTERN\n", pattern, ptr));
while ((SRE_CHAR*) state->ptr < end) {
i = SRE_MATCH(state, pattern, level);
if (i < 0)
@@ -506,13 +515,42 @@ SRE_COUNT(SRE_STATE* state, SRE_CODE* pattern, int maxcount, int level)
if (!i)
break;
}
+ TRACE(("|%p|%p|COUNT %d\n", pattern, ptr,
+ (SRE_CHAR*) state->ptr - ptr));
return (SRE_CHAR*) state->ptr - ptr;
}
+ TRACE(("|%p|%p|COUNT %d\n", pattern, ptr, ptr - (SRE_CHAR*) state->ptr));
return ptr - (SRE_CHAR*) state->ptr;
}
LOCAL(int)
+SRE_INFO(SRE_STATE* state, SRE_CODE* pattern)
+{
+ /* check if an SRE_OP_INFO block matches at the current position.
+ returns the number of SRE_CODE objects to skip if successful, 0
+ if no match */
+
+ SRE_CHAR* end = state->end;
+ SRE_CHAR* ptr = state->ptr;
+ int i;
+
+ /* check minimal length */
+ if (pattern[3] && (end - ptr) < pattern[3])
+ return 0;
+
+ /* check known prefix */
+ if (pattern[2] & SRE_INFO_PREFIX && pattern[5] > 1) {
+ /* <length> <skip> <prefix data> <overlap data> */
+ for (i = 0; i < pattern[5]; i++)
+ if ((SRE_CODE) ptr[i] != pattern[7 + i])
+ return 0;
+ return pattern[0] + 2 * pattern[6];
+ }
+ return pattern[0];
+}
+
+LOCAL(int)
SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
{
/* check if string matches the given pattern. returns <0 for
@@ -527,7 +565,7 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
SRE_REPEAT rep; /* FIXME: <fl> allocate in STATE instead */
- TRACE(("%8d: enter %d\n", PTR(ptr), level));
+ TRACE(("|%p|%p|ENTER %d\n", pattern, ptr, level));
#if defined(USE_STACKCHECK)
if (level % 10 == 0 && PyOS_CheckStack()) {
@@ -556,19 +594,19 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
case SRE_OP_FAILURE:
/* immediate failure */
- TRACE(("%8d: failure\n", PTR(ptr)));
+ TRACE(("|%p|%p|FAILURE\n", pattern, ptr));
return 0;
case SRE_OP_SUCCESS:
/* end of pattern */
- TRACE(("%8d: success\n", PTR(ptr)));
+ TRACE(("|%p|%p|SUCCESS\n", pattern, ptr));
state->ptr = ptr;
return 1;
case SRE_OP_AT:
/* match at given position */
/* <AT> <code> */
- TRACE(("%8d: position %d\n", PTR(ptr), *pattern));
+ TRACE(("|%p|%p|AT %d\n", pattern, ptr, *pattern));
if (!SRE_AT(state, ptr, *pattern))
return 0;
pattern++;
@@ -577,11 +615,9 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
case SRE_OP_CATEGORY:
/* match at given category */
/* <CATEGORY> <code> */
- TRACE(("%8d: category %d [category %d]\n", PTR(ptr),
- *ptr, *pattern));
+ TRACE(("|%p|%p|CATEGORY %d\n", pattern, ptr, *pattern));
if (ptr >= end || !sre_category(pattern[0], ptr[0]))
return 0;
- TRACE(("%8d: category ok\n", PTR(ptr)));
pattern++;
ptr++;
break;
@@ -589,7 +625,7 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
case SRE_OP_LITERAL:
/* match literal string */
/* <LITERAL> <code> */
- TRACE(("%8d: literal %c\n", PTR(ptr), pattern[0]));
+ TRACE(("|%p|%p|LITERAL %d\n", pattern, ptr, *pattern));
if (ptr >= end || (SRE_CODE) ptr[0] != pattern[0])
return 0;
pattern++;
@@ -599,7 +635,7 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
case SRE_OP_NOT_LITERAL:
/* match anything that is not literal character */
/* <NOT_LITERAL> <code> */
- TRACE(("%8d: literal not %c\n", PTR(ptr), pattern[0]));
+ TRACE(("|%p|%p|NOT_LITERAL %d\n", pattern, ptr, *pattern));
if (ptr >= end || (SRE_CODE) ptr[0] == pattern[0])
return 0;
pattern++;
@@ -609,7 +645,7 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
case SRE_OP_ANY:
/* match anything (except a newline) */
/* <ANY> */
- TRACE(("%8d: anything (except newline)\n", PTR(ptr)));
+ TRACE(("|%p|%p|ANY\n", pattern, ptr));
if (ptr >= end || SRE_IS_LINEBREAK(ptr[0]))
return 0;
ptr++;
@@ -618,7 +654,7 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
case SRE_OP_ANY_ALL:
/* match anything */
/* <ANY_ALL> */
- TRACE(("%8d: anything\n", PTR(ptr)));
+ TRACE(("|%p|%p|ANY_ALL\n", pattern, ptr));
if (ptr >= end)
return 0;
ptr++;
@@ -627,8 +663,8 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
case SRE_OP_IN:
/* match set member (or non_member) */
/* <IN> <skip> <set> */
- TRACE(("%8d: set %c\n", PTR(ptr), *ptr));
- if (ptr >= end || !SRE_MEMBER(pattern + 1, *ptr))
+ TRACE(("|%p|%p|IN\n", pattern, ptr));
+ if (ptr >= end || !SRE_CHARSET(pattern + 1, *ptr))
return 0;
pattern += pattern[0];
ptr++;
@@ -636,7 +672,7 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
case SRE_OP_GROUPREF:
/* match backreference */
- TRACE(("%8d: group %d\n", PTR(ptr), pattern[0]));
+ TRACE(("|%p|%p|GROUPREF %d\n", pattern, ptr, pattern[0]));
i = pattern[0];
{
SRE_CHAR* p = (SRE_CHAR*) state->mark[i+i];
@@ -654,7 +690,7 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
case SRE_OP_GROUPREF_IGNORE:
/* match backreference */
- TRACE(("%8d: group ignore %d\n", PTR(ptr), pattern[0]));
+ TRACE(("|%p|%p|GROUPREF_IGNORE %d\n", pattern, ptr, pattern[0]));
i = pattern[0];
{
SRE_CHAR* p = (SRE_CHAR*) state->mark[i+i];
@@ -672,7 +708,7 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
break;
case SRE_OP_LITERAL_IGNORE:
- TRACE(("%8d: literal lower(%c)\n", PTR(ptr), pattern[0]));
+ TRACE(("|%p|%p|LITERAL_IGNORE %d\n", pattern, ptr, pattern[0]));
if (ptr >= end ||
state->lower(*ptr) != state->lower(*pattern))
return 0;
@@ -681,7 +717,7 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
break;
case SRE_OP_NOT_LITERAL_IGNORE:
- TRACE(("%8d: literal not lower(%c)\n", PTR(ptr), pattern[0]));
+ TRACE(("|%p|%p|NOT_LITERAL_IGNORE %d\n", pattern, ptr, *pattern));
if (ptr >= end ||
state->lower(*ptr) == state->lower(*pattern))
return 0;
@@ -690,9 +726,9 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
break;
case SRE_OP_IN_IGNORE:
- TRACE(("%8d: set lower(%c)\n", PTR(ptr), *ptr));
+ TRACE(("|%p|%p|IN_IGNORE\n", pattern, ptr));
if (ptr >= end
- || !SRE_MEMBER(pattern + 1, (SRE_CODE) state->lower(*ptr)))
+ || !SRE_CHARSET(pattern + 1, (SRE_CODE) state->lower(*ptr)))
return 0;
pattern += pattern[0];
ptr++;
@@ -701,7 +737,7 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
case SRE_OP_MARK:
/* set mark */
/* <MARK> <gid> */
- TRACE(("%8d: set mark %d\n", PTR(ptr), pattern[0]));
+ TRACE(("|%p|%p|MARK %d\n", pattern, ptr, pattern[0]));
i = pattern[0];
if (i & 1)
state->lastindex = i/2 + 1;
@@ -715,14 +751,14 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
case SRE_OP_INFO:
/* jump forward */
/* <JUMP> <offset> */
- TRACE(("%8d: jump +%d\n", PTR(ptr), pattern[0]));
+ TRACE(("|%p|%p|JUMP %d\n", pattern, ptr, pattern[0]));
pattern += pattern[0];
break;
case SRE_OP_ASSERT:
/* assert subpattern */
/* <ASSERT> <skip> <back> <pattern> */
- TRACE(("%8d: assert subpattern %d\n", PTR(ptr), pattern[1]));
+ TRACE(("|%p|%p|ASSERT %d\n", pattern, ptr, pattern[1]));
state->ptr = ptr - pattern[1];
if (state->ptr < state->beginning)
return 0;
@@ -737,7 +773,7 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
case SRE_OP_ASSERT_NOT:
/* assert not subpattern */
/* <ASSERT_NOT> <skip> <back> <pattern> */
- TRACE(("%8d: assert not subpattern %d\n", PTR(ptr), pattern[1]));
+ TRACE(("|%p|%p|ASSERT_NOT %d\n", pattern, ptr, pattern[1]));
state->ptr = ptr - pattern[1];
if (state->ptr < state->beginning)
return 0;
@@ -754,34 +790,26 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
case SRE_OP_BRANCH:
/* alternation */
/* <BRANCH> <0=skip> code <JUMP> ... <NULL> */
- TRACE(("%8d: branch\n", PTR(ptr)));
+ TRACE(("|%p|%p|BRANCH\n", pattern, ptr));
lastmark = state->lastmark;
- while (pattern[0]) {
- SRE_CODE* code = pattern+1;
- TRACE(("%8d: try branch\n", PTR(ptr)));
- switch (code[0]) {
- case SRE_OP_IN:
- if (ptr >= end || !SRE_MEMBER(code + 2, ptr[0]))
- break;
- code += code[1] + 1;
- state->ptr = ptr + 1;
- goto branch;
- case SRE_OP_LITERAL:
- if (ptr >= end || (SRE_CODE) ptr[0] != code[1])
- break;
- code += 2;
- state->ptr = ptr + 1;
- goto branch;
- default:
- state->ptr = ptr;
- branch:
- i = SRE_MATCH(state, code, level + 1);
- if (i)
- return i;
- while (state->lastmark > lastmark)
- state->mark[state->lastmark--] = NULL;
+ for (; pattern[0]; pattern += pattern[0]) {
+ if (pattern[1] == SRE_OP_LITERAL &&
+ (ptr >= end || (SRE_CODE) *ptr != pattern[2]))
+ continue;
+ if (pattern[1] == SRE_OP_IN &&
+ (ptr >= end || !SRE_CHARSET(pattern + 3, (SRE_CODE) *ptr)))
+ continue;
+ state->ptr = ptr;
+ i = SRE_MATCH(state, pattern + 1, level + 1);
+ if (i)
+ return i;
+ if (state->lastmark > lastmark) {
+ memset(
+ state->mark + lastmark + 1, 0,
+ (state->lastmark - lastmark) * sizeof(void*)
+ );
+ state->lastmark = lastmark;
}
- pattern += pattern[0];
}
return 0;
@@ -795,7 +823,7 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
/* <REPEAT_ONE> <skip> <1=min> <2=max> item <SUCCESS> tail */
- TRACE(("%8d: max repeat one {%d,%d}\n", PTR(ptr),
+ TRACE(("|%p|%p|REPEAT_ONE %d %d\n", pattern, ptr,
pattern[1], pattern[2]));
if (ptr + pattern[1] > end)
@@ -814,14 +842,11 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
string. check if the rest of the pattern matches,
and backtrack if not. */
- TRACE(("%8d: repeat %d found\n", PTR(ptr), count));
-
if (count < (int) pattern[1])
return 0;
if (pattern[pattern[0]] == SRE_OP_SUCCESS) {
/* tail is empty. we're finished */
- TRACE(("%8d: tail is empty\n", PTR(ptr)));
state->ptr = ptr;
return 1;
@@ -829,41 +854,39 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
/* tail starts with a literal. skip positions where
the rest of the pattern cannot possibly match */
chr = pattern[pattern[0]+1];
- TRACE(("%8d: tail is literal %d\n", PTR(ptr), chr));
for (;;) {
- TRACE(("%8d: scan for tail match\n", PTR(ptr)));
while (count >= (int) pattern[1] &&
(ptr >= end || *ptr != chr)) {
ptr--;
count--;
}
- TRACE(("%8d: check tail\n", PTR(ptr)));
if (count < (int) pattern[1])
break;
state->ptr = ptr;
i = SRE_MATCH(state, pattern + pattern[0], level + 1);
- if (i > 0) {
- TRACE(("%8d: repeat %d picked\n", PTR(ptr), count));
+ if (i)
return 1;
- }
ptr--;
count--;
}
} else {
/* general case */
- TRACE(("%8d: tail is pattern\n", PTR(ptr)));
+ lastmark = state->lastmark;
while (count >= (int) pattern[1]) {
state->ptr = ptr;
i = SRE_MATCH(state, pattern + pattern[0], level + 1);
- if (i < 0)
- return i;
- if (i) {
- TRACE(("%8d: repeat %d picked\n", PTR(ptr), count));
+ if (i)
return 1;
- }
ptr--;
count--;
+ if (state->lastmark > lastmark) {
+ memset(
+ state->mark + lastmark + 1, 0,
+ (state->lastmark - lastmark) * sizeof(void*)
+ );
+ state->lastmark = lastmark;
+ }
}
}
return 0;
@@ -872,7 +895,7 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
/* create repeat context. all the hard work is done
by the UNTIL operator */
/* <REPEAT> <skip> <1=min> <2=max> item <UNTIL> tail */
- TRACE(("%8d: repeat {%d,%d}\n", PTR(ptr),
+ TRACE(("|%p|%p|REPEAT %d %d\n", pattern, ptr,
pattern[1], pattern[2]));
rep.count = -1;
@@ -904,11 +927,10 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
count = rp->count + 1;
- TRACE(("%8d: max until %d\n", PTR(ptr), count));
+ TRACE(("|%p|%p|MAX_UNTIL %d\n", pattern, ptr, count));
if (count < rp->pattern[1]) {
/* not enough matches */
- TRACE(("%8d: match item (required)\n", PTR(ptr)));
rp->count = count;
/* RECURSIVE */
i = SRE_MATCH(state, rp->pattern + 3, level + 1);
@@ -920,7 +942,6 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
}
if (count < rp->pattern[2] || rp->pattern[2] == 65535) {
- TRACE(("%8d: match item (optional)\n", PTR(ptr)));
/* we may have enough matches, but if we can
match another item, do so */
rp->count = count;
@@ -937,7 +958,6 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
/* cannot match more repeated items here. make sure the
tail matches */
- TRACE(("%8d: match tail\n", PTR(ptr)));
state->repeat = rp->prev;
i = SRE_MATCH(state, pattern, level + 1);
if (i)
@@ -955,13 +975,12 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
count = rp->count + 1;
- TRACE(("%8d: min until %d\n", PTR(ptr), count));
+ TRACE(("|%p|%p|MIN_UNTIL %d\n", pattern, ptr, count));
state->ptr = ptr;
if (count < rp->pattern[1]) {
/* not enough matches */
- TRACE(("%8d: match item (required)\n", PTR(ptr)));
rp->count = count;
/* RECURSIVE */
i = SRE_MATCH(state, rp->pattern + 3, level + 1);
@@ -973,7 +992,6 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
}
/* see if the tail matches */
- TRACE(("%8d: match tail\n", PTR(ptr)));
state->repeat = rp->prev;
i = SRE_MATCH(state, pattern, level + 1);
if (i) {
@@ -985,7 +1003,6 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
if (count >= rp->pattern[2] && rp->pattern[2] != 65535)
return 0;
- TRACE(("%8d: match item (optional)\n", PTR(ptr)));
rp->count = count;
/* RECURSIVE */
i = SRE_MATCH(state, rp->pattern + 3, level + 1);
@@ -995,7 +1012,7 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
return 0;
default:
- TRACE(("%8d: unknown opcode %d\n", PTR(ptr), pattern[-1]));
+ TRACE(("|%p|%p|UNKNOWN %d\n", pattern, ptr, pattern[-1]));
return SRE_ERROR_ILLEGAL;
}
}
@@ -1011,6 +1028,7 @@ SRE_SEARCH(SRE_STATE* state, SRE_CODE* pattern)
SRE_CHAR* end = state->end;
int status = 0;
int prefix_len = 0;
+ int prefix_skip;
SRE_CODE* prefix = NULL;
SRE_CODE* charset = NULL;
SRE_CODE* overlap = NULL;
@@ -1032,16 +1050,22 @@ SRE_SEARCH(SRE_STATE* state, SRE_CODE* pattern)
if (flags & SRE_INFO_PREFIX) {
/* pattern starts with a known prefix */
+ /* <length> <skip> <prefix data> <overlap data> */
prefix_len = pattern[5];
- prefix = pattern + 6;
+ prefix_skip = pattern[6];
+ prefix = pattern + 7;
overlap = prefix + prefix_len - 1;
} else if (flags & SRE_INFO_CHARSET)
/* pattern starts with a character from a known set */
+ /* <charset> */
charset = pattern + 5;
pattern += 1 + pattern[1];
}
+ TRACE(("prefix = %p %d %d\n", prefix, prefix_len, prefix_skip));
+ TRACE(("charset = %p\n", charset));
+
#if defined(USE_FAST_SEARCH)
if (prefix_len > 1) {
/* pattern starts with a known prefix. use the overlap
@@ -1058,12 +1082,12 @@ SRE_SEARCH(SRE_STATE* state, SRE_CODE* pattern)
} else {
if (++i == prefix_len) {
/* found a potential match */
- TRACE(("%8d: === SEARCH === hit\n", PTR(ptr)));
- state->start = ptr - prefix_len + 1;
- state->ptr = ptr + 1;
+ TRACE(("|%p|%p|SEARCH SCAN\n", pattern, ptr));
+ state->start = ptr + 1 - prefix_len;
+ state->ptr = ptr + 1 - prefix_len + prefix_skip;
if (flags & SRE_INFO_LITERAL)
return 1; /* we got all of it */
- status = SRE_MATCH(state, pattern + 2*prefix_len, 1);
+ status = SRE_MATCH(state, pattern + 2*prefix_skip, 1);
if (status != 0)
return status;
/* close but no cigar -- try again */
@@ -1083,12 +1107,13 @@ SRE_SEARCH(SRE_STATE* state, SRE_CODE* pattern)
/* pattern starts with a literal character. this is used
for short prefixes, and if fast search is disabled */
SRE_CODE chr = pattern[1];
+ end = state->end;
for (;;) {
while (ptr < end && (SRE_CODE) ptr[0] != chr)
ptr++;
if (ptr == end)
return 0;
- TRACE(("%8d: === SEARCH === literal\n", PTR(ptr)));
+ TRACE(("|%p|%p|SEARCH LITERAL\n", pattern, ptr));
state->start = ptr;
state->ptr = ++ptr;
status = SRE_MATCH(state, pattern + 2, 1);
@@ -1097,22 +1122,24 @@ SRE_SEARCH(SRE_STATE* state, SRE_CODE* pattern)
}
} else if (charset) {
/* pattern starts with a character from a known set */
+ end = state->end;
for (;;) {
- while (ptr < end && !SRE_MEMBER(charset, ptr[0]))
+ while (ptr < end && !SRE_CHARSET(charset, ptr[0]))
ptr++;
if (ptr == end)
return 0;
- TRACE(("%8d: === SEARCH === charset\n", PTR(ptr)));
+ TRACE(("|%p|%p|SEARCH CHARSET\n", pattern, ptr));
state->start = ptr;
state->ptr = ptr;
status = SRE_MATCH(state, pattern, 1);
if (status != 0)
break;
+ ptr++;
}
} else
/* general case */
while (ptr <= end) {
- TRACE(("%8d: === SEARCH ===\n", PTR(ptr)));
+ TRACE(("|%p|%p|SEARCH\n", pattern, ptr));
state->start = state->ptr = ptr++;
status = SRE_MATCH(state, pattern, 1);
if (status != 0)
@@ -1480,6 +1507,8 @@ pattern_match(PatternObject* self, PyObject* args)
state.ptr = state.start;
+ TRACE(("|%p|%p|MATCH\n", PatternObject_GetCode(self), state.ptr));
+
if (state.charsize == 1) {
status = sre_match(&state, PatternObject_GetCode(self), 1);
} else {
@@ -1488,6 +1517,8 @@ pattern_match(PatternObject* self, PyObject* args)
#endif
}
+ TRACE(("|%p|%p|END\n", PatternObject_GetCode(self), state.ptr));
+
state_fini(&state);
return pattern_new_match(self, &state, status);
@@ -1509,6 +1540,8 @@ pattern_search(PatternObject* self, PyObject* args)
if (!string)
return NULL;
+ TRACE(("|%p|%p|SEARCH\n", PatternObject_GetCode(self), state.ptr));
+
if (state.charsize == 1) {
status = sre_search(&state, PatternObject_GetCode(self));
} else {
@@ -1517,6 +1550,8 @@ pattern_search(PatternObject* self, PyObject* args)
#endif
}
+ TRACE(("|%p|%p|END\n", PatternObject_GetCode(self), state.ptr));
+
state_fini(&state);
return pattern_new_match(self, &state, status);
generated by cgit v0.12 at 2024-11-22 01:31:13 (GMT)