summaryrefslogtreecommitdiffstats
path: root/Modules/_sre.c
diff options
context:
space:
mode:
Diffstat (limited to 'Modules/_sre.c')
-rw-r--r--Modules/_sre.c1342
1 files changed, 3 insertions, 1339 deletions
diff --git a/Modules/_sre.c b/Modules/_sre.c
index d71cc21..9e79855 100644
--- a/Modules/_sre.c
+++ b/Modules/_sre.c
@@ -34,8 +34,6 @@
* other compatibility work.
*/
-#ifndef SRE_RECURSIVE
-
static char copyright[] =
" SRE 2.2.2 Copyright (c) 1997-2002 by Secret Labs AB ";
@@ -251,1346 +249,21 @@ data_stack_grow(SRE_STATE* state, Py_ssize_t size)
#define SRE_CHAR Py_UCS1
#define SIZEOF_SRE_CHAR 1
#define SRE(F) sre_ucs1_##F
-#define SRE_RECURSIVE
-#include "_sre.c"
+#include "sre_lib.h"
/* generate 16-bit unicode version */
#define SRE_CHAR Py_UCS2
#define SIZEOF_SRE_CHAR 2
#define SRE(F) sre_ucs2_##F
-#define SRE_RECURSIVE
-#include "_sre.c"
+#include "sre_lib.h"
/* generate 32-bit unicode version */
#define SRE_CHAR Py_UCS4
#define SIZEOF_SRE_CHAR 4
#define SRE(F) sre_ucs4_##F
-#define SRE_RECURSIVE
-#include "_sre.c"
-
-#endif /* SRE_RECURSIVE */
-
-#ifdef SRE_RECURSIVE
-/* -------------------------------------------------------------------- */
-/* String matching engine */
-
-/* the following section is compiled three times, with different character
- settings */
-
-LOCAL(int)
-SRE(at)(SRE_STATE* state, SRE_CHAR* ptr, SRE_CODE at)
-{
- /* check if pointer is at given position */
-
- Py_ssize_t thisp, thatp;
-
- switch (at) {
-
- case SRE_AT_BEGINNING:
- case SRE_AT_BEGINNING_STRING:
- return ((void*) ptr == state->beginning);
-
- case SRE_AT_BEGINNING_LINE:
- return ((void*) ptr == state->beginning ||
- SRE_IS_LINEBREAK((int) ptr[-1]));
-
- case SRE_AT_END:
- return (((void*) (ptr+1) == state->end &&
- SRE_IS_LINEBREAK((int) ptr[0])) ||
- ((void*) ptr == state->end));
-
- case SRE_AT_END_LINE:
- return ((void*) ptr == state->end ||
- SRE_IS_LINEBREAK((int) ptr[0]));
-
- case SRE_AT_END_STRING:
- return ((void*) ptr == state->end);
-
- case SRE_AT_BOUNDARY:
- if (state->beginning == state->end)
- return 0;
- thatp = ((void*) ptr > state->beginning) ?
- SRE_IS_WORD((int) ptr[-1]) : 0;
- thisp = ((void*) ptr < state->end) ?
- SRE_IS_WORD((int) ptr[0]) : 0;
- return thisp != thatp;
-
- case SRE_AT_NON_BOUNDARY:
- if (state->beginning == state->end)
- return 0;
- thatp = ((void*) ptr > state->beginning) ?
- SRE_IS_WORD((int) ptr[-1]) : 0;
- thisp = ((void*) ptr < state->end) ?
- SRE_IS_WORD((int) ptr[0]) : 0;
- return thisp == thatp;
-
- case SRE_AT_LOC_BOUNDARY:
- if (state->beginning == state->end)
- return 0;
- thatp = ((void*) ptr > state->beginning) ?
- SRE_LOC_IS_WORD((int) ptr[-1]) : 0;
- thisp = ((void*) ptr < state->end) ?
- SRE_LOC_IS_WORD((int) ptr[0]) : 0;
- return thisp != thatp;
-
- case SRE_AT_LOC_NON_BOUNDARY:
- if (state->beginning == state->end)
- return 0;
- thatp = ((void*) ptr > state->beginning) ?
- SRE_LOC_IS_WORD((int) ptr[-1]) : 0;
- thisp = ((void*) ptr < state->end) ?
- SRE_LOC_IS_WORD((int) ptr[0]) : 0;
- return thisp == thatp;
-
- case SRE_AT_UNI_BOUNDARY:
- if (state->beginning == state->end)
- return 0;
- thatp = ((void*) ptr > state->beginning) ?
- SRE_UNI_IS_WORD((int) ptr[-1]) : 0;
- thisp = ((void*) ptr < state->end) ?
- SRE_UNI_IS_WORD((int) ptr[0]) : 0;
- return thisp != thatp;
-
- case SRE_AT_UNI_NON_BOUNDARY:
- if (state->beginning == state->end)
- return 0;
- thatp = ((void*) ptr > state->beginning) ?
- SRE_UNI_IS_WORD((int) ptr[-1]) : 0;
- thisp = ((void*) ptr < state->end) ?
- SRE_UNI_IS_WORD((int) ptr[0]) : 0;
- return thisp == thatp;
-
- }
-
- return 0;
-}
-
-LOCAL(int)
-SRE(charset)(SRE_CODE* set, SRE_CODE ch)
-{
- /* check if character is a member of the given set */
-
- int ok = 1;
-
- for (;;) {
- switch (*set++) {
-
- case SRE_OP_FAILURE:
- return !ok;
-
- case SRE_OP_LITERAL:
- /* <LITERAL> <code> */
- if (ch == set[0])
- return ok;
- set++;
- break;
-
- case SRE_OP_CATEGORY:
- /* <CATEGORY> <code> */
- if (sre_category(set[0], (int) ch))
- return ok;
- set++;
- break;
-
- case SRE_OP_CHARSET:
- /* <CHARSET> <bitmap> */
- if (ch < 256 &&
- (set[ch/SRE_CODE_BITS] & (1u << (ch & (SRE_CODE_BITS-1)))))
- return ok;
- set += 256/SRE_CODE_BITS;
- break;
-
- case SRE_OP_RANGE:
- /* <RANGE> <lower> <upper> */
- if (set[0] <= ch && ch <= set[1])
- return ok;
- set += 2;
- break;
-
- case SRE_OP_NEGATE:
- ok = !ok;
- break;
-
- case SRE_OP_BIGCHARSET:
- /* <BIGCHARSET> <blockcount> <256 blockindices> <blocks> */
- {
- Py_ssize_t count, block;
- count = *(set++);
-
- if (ch < 0x10000u)
- block = ((unsigned char*)set)[ch >> 8];
- else
- block = -1;
- set += 256/sizeof(SRE_CODE);
- if (block >=0 &&
- (set[(block * 256 + (ch & 255))/SRE_CODE_BITS] &
- (1u << (ch & (SRE_CODE_BITS-1)))))
- return ok;
- set += count * (256/SRE_CODE_BITS);
- break;
- }
-
- default:
- /* internal error -- there's not much we can do about it
- here, so let's just pretend it didn't match... */
- return 0;
- }
- }
-}
-
-LOCAL(Py_ssize_t) SRE(match)(SRE_STATE* state, SRE_CODE* pattern);
-
-LOCAL(Py_ssize_t)
-SRE(count)(SRE_STATE* state, SRE_CODE* pattern, Py_ssize_t maxcount)
-{
- SRE_CODE chr;
- SRE_CHAR c;
- SRE_CHAR* ptr = (SRE_CHAR *)state->ptr;
- SRE_CHAR* end = (SRE_CHAR *)state->end;
- Py_ssize_t i;
-
- /* adjust end */
- if (maxcount < end - ptr && maxcount != SRE_MAXREPEAT)
- end = ptr + maxcount;
-
- switch (pattern[0]) {
-
- case SRE_OP_IN:
- /* repeated set */
- TRACE(("|%p|%p|COUNT IN\n", pattern, ptr));
- while (ptr < end && SRE(charset)(pattern + 2, *ptr))
- ptr++;
- break;
-
- case SRE_OP_ANY:
- /* repeated dot wildcard. */
- TRACE(("|%p|%p|COUNT ANY\n", pattern, ptr));
- while (ptr < end && !SRE_IS_LINEBREAK(*ptr))
- ptr++;
- break;
-
- case SRE_OP_ANY_ALL:
- /* repeated dot wildcard. 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));
- c = (SRE_CHAR) chr;
-#if SIZEOF_SRE_CHAR < 4
- if ((SRE_CODE) c != chr)
- ; /* literal can't match: doesn't fit in char width */
- else
-#endif
- while (ptr < end && *ptr == c)
- ptr++;
- break;
-
- 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;
-
- case SRE_OP_NOT_LITERAL:
- /* repeated non-literal */
- chr = pattern[1];
- TRACE(("|%p|%p|COUNT NOT_LITERAL %d\n", pattern, ptr, chr));
- c = (SRE_CHAR) chr;
-#if SIZEOF_SRE_CHAR < 4
- if ((SRE_CODE) c != chr)
- ptr = end; /* literal can't match: doesn't fit in char width */
- else
-#endif
- while (ptr < end && *ptr != c)
- ptr++;
- break;
-
- 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;
-
- default:
- /* repeated single character pattern */
- TRACE(("|%p|%p|COUNT SUBPATTERN\n", pattern, ptr));
- while ((SRE_CHAR*) state->ptr < end) {
- i = SRE(match)(state, pattern);
- if (i < 0)
- return i;
- if (!i)
- break;
- }
- TRACE(("|%p|%p|COUNT %" PY_FORMAT_SIZE_T "d\n", pattern, ptr,
- (SRE_CHAR*) state->ptr - ptr));
- return (SRE_CHAR*) state->ptr - ptr;
- }
-
- TRACE(("|%p|%p|COUNT %" PY_FORMAT_SIZE_T "d\n", pattern, ptr,
- ptr - (SRE_CHAR*) state->ptr));
- return ptr - (SRE_CHAR*) state->ptr;
-}
-
-#if 0 /* not used in this release */
-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 = (SRE_CHAR*) state->end;
- SRE_CHAR* ptr = (SRE_CHAR*) state->ptr;
- Py_ssize_t 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];
-}
-#endif
-
-/* The macros below should be used to protect recursive SRE(match)()
- * calls that *failed* and do *not* return immediately (IOW, those
- * that will backtrack). Explaining:
- *
- * - Recursive SRE(match)() returned true: that's usually a success
- * (besides atypical cases like ASSERT_NOT), therefore there's no
- * reason to restore lastmark;
- *
- * - Recursive SRE(match)() returned false but the current SRE(match)()
- * is returning to the caller: If the current SRE(match)() is the
- * top function of the recursion, returning false will be a matching
- * failure, and it doesn't matter where lastmark is pointing to.
- * If it's *not* the top function, it will be a recursive SRE(match)()
- * failure by itself, and the calling SRE(match)() will have to deal
- * with the failure by the same rules explained here (it will restore
- * lastmark by itself if necessary);
- *
- * - Recursive SRE(match)() returned false, and will continue the
- * outside 'for' loop: must be protected when breaking, since the next
- * OP could potentially depend on lastmark;
- *
- * - Recursive SRE(match)() returned false, and will be called again
- * inside a local for/while loop: must be protected between each
- * loop iteration, since the recursive SRE(match)() could do anything,
- * and could potentially depend on lastmark.
- *
- * For more information, check the discussion at SF patch #712900.
- */
-#define LASTMARK_SAVE() \
- do { \
- ctx->lastmark = state->lastmark; \
- ctx->lastindex = state->lastindex; \
- } while (0)
-#define LASTMARK_RESTORE() \
- do { \
- state->lastmark = ctx->lastmark; \
- state->lastindex = ctx->lastindex; \
- } while (0)
-
-#define RETURN_ERROR(i) do { return i; } while(0)
-#define RETURN_FAILURE do { ret = 0; goto exit; } while(0)
-#define RETURN_SUCCESS do { ret = 1; goto exit; } while(0)
-
-#define RETURN_ON_ERROR(i) \
- do { if (i < 0) RETURN_ERROR(i); } while (0)
-#define RETURN_ON_SUCCESS(i) \
- do { RETURN_ON_ERROR(i); if (i > 0) RETURN_SUCCESS; } while (0)
-#define RETURN_ON_FAILURE(i) \
- do { RETURN_ON_ERROR(i); if (i == 0) RETURN_FAILURE; } while (0)
-
-#define SFY(x) #x
-
-#define DATA_STACK_ALLOC(state, type, ptr) \
-do { \
- alloc_pos = state->data_stack_base; \
- TRACE(("allocating %s in %" PY_FORMAT_SIZE_T "d " \
- "(%" PY_FORMAT_SIZE_T "d)\n", \
- SFY(type), alloc_pos, sizeof(type))); \
- if (sizeof(type) > state->data_stack_size - alloc_pos) { \
- int j = data_stack_grow(state, sizeof(type)); \
- if (j < 0) return j; \
- if (ctx_pos != -1) \
- DATA_STACK_LOOKUP_AT(state, SRE(match_context), ctx, ctx_pos); \
- } \
- ptr = (type*)(state->data_stack+alloc_pos); \
- state->data_stack_base += sizeof(type); \
-} while (0)
-
-#define DATA_STACK_LOOKUP_AT(state, type, ptr, pos) \
-do { \
- TRACE(("looking up %s at %" PY_FORMAT_SIZE_T "d\n", SFY(type), pos)); \
- ptr = (type*)(state->data_stack+pos); \
-} while (0)
-
-#define DATA_STACK_PUSH(state, data, size) \
-do { \
- TRACE(("copy data in %p to %" PY_FORMAT_SIZE_T "d " \
- "(%" PY_FORMAT_SIZE_T "d)\n", \
- data, state->data_stack_base, size)); \
- if (size > state->data_stack_size - state->data_stack_base) { \
- int j = data_stack_grow(state, size); \
- if (j < 0) return j; \
- if (ctx_pos != -1) \
- DATA_STACK_LOOKUP_AT(state, SRE(match_context), ctx, ctx_pos); \
- } \
- memcpy(state->data_stack+state->data_stack_base, data, size); \
- state->data_stack_base += size; \
-} while (0)
-
-#define DATA_STACK_POP(state, data, size, discard) \
-do { \
- TRACE(("copy data to %p from %" PY_FORMAT_SIZE_T "d " \
- "(%" PY_FORMAT_SIZE_T "d)\n", \
- data, state->data_stack_base-size, size)); \
- memcpy(data, state->data_stack+state->data_stack_base-size, size); \
- if (discard) \
- state->data_stack_base -= size; \
-} while (0)
-
-#define DATA_STACK_POP_DISCARD(state, size) \
-do { \
- TRACE(("discard data from %" PY_FORMAT_SIZE_T "d " \
- "(%" PY_FORMAT_SIZE_T "d)\n", \
- state->data_stack_base-size, size)); \
- state->data_stack_base -= size; \
-} while(0)
-
-#define DATA_PUSH(x) \
- DATA_STACK_PUSH(state, (x), sizeof(*(x)))
-#define DATA_POP(x) \
- DATA_STACK_POP(state, (x), sizeof(*(x)), 1)
-#define DATA_POP_DISCARD(x) \
- DATA_STACK_POP_DISCARD(state, sizeof(*(x)))
-#define DATA_ALLOC(t,p) \
- DATA_STACK_ALLOC(state, t, p)
-#define DATA_LOOKUP_AT(t,p,pos) \
- DATA_STACK_LOOKUP_AT(state,t,p,pos)
-
-#define MARK_PUSH(lastmark) \
- do if (lastmark > 0) { \
- i = lastmark; /* ctx->lastmark may change if reallocated */ \
- DATA_STACK_PUSH(state, state->mark, (i+1)*sizeof(void*)); \
- } while (0)
-#define MARK_POP(lastmark) \
- do if (lastmark > 0) { \
- DATA_STACK_POP(state, state->mark, (lastmark+1)*sizeof(void*), 1); \
- } while (0)
-#define MARK_POP_KEEP(lastmark) \
- do if (lastmark > 0) { \
- DATA_STACK_POP(state, state->mark, (lastmark+1)*sizeof(void*), 0); \
- } while (0)
-#define MARK_POP_DISCARD(lastmark) \
- do if (lastmark > 0) { \
- DATA_STACK_POP_DISCARD(state, (lastmark+1)*sizeof(void*)); \
- } while (0)
-
-#define JUMP_NONE 0
-#define JUMP_MAX_UNTIL_1 1
-#define JUMP_MAX_UNTIL_2 2
-#define JUMP_MAX_UNTIL_3 3
-#define JUMP_MIN_UNTIL_1 4
-#define JUMP_MIN_UNTIL_2 5
-#define JUMP_MIN_UNTIL_3 6
-#define JUMP_REPEAT 7
-#define JUMP_REPEAT_ONE_1 8
-#define JUMP_REPEAT_ONE_2 9
-#define JUMP_MIN_REPEAT_ONE 10
-#define JUMP_BRANCH 11
-#define JUMP_ASSERT 12
-#define JUMP_ASSERT_NOT 13
-
-#define DO_JUMP(jumpvalue, jumplabel, nextpattern) \
- DATA_ALLOC(SRE(match_context), nextctx); \
- nextctx->last_ctx_pos = ctx_pos; \
- nextctx->jump = jumpvalue; \
- nextctx->pattern = nextpattern; \
- ctx_pos = alloc_pos; \
- ctx = nextctx; \
- goto entrance; \
- jumplabel: \
- while (0) /* gcc doesn't like labels at end of scopes */ \
-
-typedef struct {
- Py_ssize_t last_ctx_pos;
- Py_ssize_t jump;
- SRE_CHAR* ptr;
- SRE_CODE* pattern;
- Py_ssize_t count;
- Py_ssize_t lastmark;
- Py_ssize_t lastindex;
- union {
- SRE_CODE chr;
- SRE_REPEAT* rep;
- } u;
-} SRE(match_context);
-
-/* check if string matches the given pattern. returns <0 for
- error, 0 for failure, and 1 for success */
-LOCAL(Py_ssize_t)
-SRE(match)(SRE_STATE* state, SRE_CODE* pattern)
-{
- SRE_CHAR* end = (SRE_CHAR *)state->end;
- Py_ssize_t alloc_pos, ctx_pos = -1;
- Py_ssize_t i, ret = 0;
- Py_ssize_t jump;
- unsigned int sigcount=0;
-
- SRE(match_context)* ctx;
- SRE(match_context)* nextctx;
-
- TRACE(("|%p|%p|ENTER\n", pattern, state->ptr));
-
- DATA_ALLOC(SRE(match_context), ctx);
- ctx->last_ctx_pos = -1;
- ctx->jump = JUMP_NONE;
- ctx->pattern = pattern;
- ctx_pos = alloc_pos;
-
-entrance:
-
- ctx->ptr = (SRE_CHAR *)state->ptr;
-
- if (ctx->pattern[0] == SRE_OP_INFO) {
- /* optimization info block */
- /* <INFO> <1=skip> <2=flags> <3=min> ... */
- if (ctx->pattern[3] && (Py_uintptr_t)(end - ctx->ptr) < ctx->pattern[3]) {
- TRACE(("reject (got %" PY_FORMAT_SIZE_T "d chars, "
- "need %" PY_FORMAT_SIZE_T "d)\n",
- end - ctx->ptr, (Py_ssize_t) ctx->pattern[3]));
- RETURN_FAILURE;
- }
- ctx->pattern += ctx->pattern[1] + 1;
- }
-
- for (;;) {
- ++sigcount;
- if ((0 == (sigcount & 0xfff)) && PyErr_CheckSignals())
- RETURN_ERROR(SRE_ERROR_INTERRUPTED);
-
- switch (*ctx->pattern++) {
-
- case SRE_OP_MARK:
- /* set mark */
- /* <MARK> <gid> */
- TRACE(("|%p|%p|MARK %d\n", ctx->pattern,
- ctx->ptr, ctx->pattern[0]));
- i = ctx->pattern[0];
- if (i & 1)
- state->lastindex = i/2 + 1;
- if (i > state->lastmark) {
- /* state->lastmark is the highest valid index in the
- state->mark array. If it is increased by more than 1,
- the intervening marks must be set to NULL to signal
- that these marks have not been encountered. */
- Py_ssize_t j = state->lastmark + 1;
- while (j < i)
- state->mark[j++] = NULL;
- state->lastmark = i;
- }
- state->mark[i] = ctx->ptr;
- ctx->pattern++;
- break;
-
- case SRE_OP_LITERAL:
- /* match literal string */
- /* <LITERAL> <code> */
- TRACE(("|%p|%p|LITERAL %d\n", ctx->pattern,
- ctx->ptr, *ctx->pattern));
- if (ctx->ptr >= end || (SRE_CODE) ctx->ptr[0] != ctx->pattern[0])
- RETURN_FAILURE;
- ctx->pattern++;
- ctx->ptr++;
- break;
-
- case SRE_OP_NOT_LITERAL:
- /* match anything that is not literal character */
- /* <NOT_LITERAL> <code> */
- TRACE(("|%p|%p|NOT_LITERAL %d\n", ctx->pattern,
- ctx->ptr, *ctx->pattern));
- if (ctx->ptr >= end || (SRE_CODE) ctx->ptr[0] == ctx->pattern[0])
- RETURN_FAILURE;
- ctx->pattern++;
- ctx->ptr++;
- break;
-
- case SRE_OP_SUCCESS:
- /* end of pattern */
- TRACE(("|%p|%p|SUCCESS\n", ctx->pattern, ctx->ptr));
- state->ptr = ctx->ptr;
- RETURN_SUCCESS;
-
- case SRE_OP_AT:
- /* match at given position */
- /* <AT> <code> */
- TRACE(("|%p|%p|AT %d\n", ctx->pattern, ctx->ptr, *ctx->pattern));
- if (!SRE(at)(state, ctx->ptr, *ctx->pattern))
- RETURN_FAILURE;
- ctx->pattern++;
- break;
-
- case SRE_OP_CATEGORY:
- /* match at given category */
- /* <CATEGORY> <code> */
- TRACE(("|%p|%p|CATEGORY %d\n", ctx->pattern,
- ctx->ptr, *ctx->pattern));
- if (ctx->ptr >= end || !sre_category(ctx->pattern[0], ctx->ptr[0]))
- RETURN_FAILURE;
- ctx->pattern++;
- ctx->ptr++;
- break;
-
- case SRE_OP_ANY:
- /* match anything (except a newline) */
- /* <ANY> */
- TRACE(("|%p|%p|ANY\n", ctx->pattern, ctx->ptr));
- if (ctx->ptr >= end || SRE_IS_LINEBREAK(ctx->ptr[0]))
- RETURN_FAILURE;
- ctx->ptr++;
- break;
-
- case SRE_OP_ANY_ALL:
- /* match anything */
- /* <ANY_ALL> */
- TRACE(("|%p|%p|ANY_ALL\n", ctx->pattern, ctx->ptr));
- if (ctx->ptr >= end)
- RETURN_FAILURE;
- ctx->ptr++;
- break;
-
- case SRE_OP_IN:
- /* match set member (or non_member) */
- /* <IN> <skip> <set> */
- TRACE(("|%p|%p|IN\n", ctx->pattern, ctx->ptr));
- if (ctx->ptr >= end || !SRE(charset)(ctx->pattern + 1, *ctx->ptr))
- RETURN_FAILURE;
- ctx->pattern += ctx->pattern[0];
- ctx->ptr++;
- break;
-
- case SRE_OP_LITERAL_IGNORE:
- TRACE(("|%p|%p|LITERAL_IGNORE %d\n",
- ctx->pattern, ctx->ptr, ctx->pattern[0]));
- if (ctx->ptr >= end ||
- state->lower(*ctx->ptr) != state->lower(*ctx->pattern))
- RETURN_FAILURE;
- ctx->pattern++;
- ctx->ptr++;
- break;
-
- case SRE_OP_NOT_LITERAL_IGNORE:
- TRACE(("|%p|%p|NOT_LITERAL_IGNORE %d\n",
- ctx->pattern, ctx->ptr, *ctx->pattern));
- if (ctx->ptr >= end ||
- state->lower(*ctx->ptr) == state->lower(*ctx->pattern))
- RETURN_FAILURE;
- ctx->pattern++;
- ctx->ptr++;
- break;
-
- case SRE_OP_IN_IGNORE:
- TRACE(("|%p|%p|IN_IGNORE\n", ctx->pattern, ctx->ptr));
- if (ctx->ptr >= end
- || !SRE(charset)(ctx->pattern+1,
- (SRE_CODE)state->lower(*ctx->ptr)))
- RETURN_FAILURE;
- ctx->pattern += ctx->pattern[0];
- ctx->ptr++;
- break;
-
- case SRE_OP_JUMP:
- case SRE_OP_INFO:
- /* jump forward */
- /* <JUMP> <offset> */
- TRACE(("|%p|%p|JUMP %d\n", ctx->pattern,
- ctx->ptr, ctx->pattern[0]));
- ctx->pattern += ctx->pattern[0];
- break;
-
- case SRE_OP_BRANCH:
- /* alternation */
- /* <BRANCH> <0=skip> code <JUMP> ... <NULL> */
- TRACE(("|%p|%p|BRANCH\n", ctx->pattern, ctx->ptr));
- LASTMARK_SAVE();
- ctx->u.rep = state->repeat;
- if (ctx->u.rep)
- MARK_PUSH(ctx->lastmark);
- for (; ctx->pattern[0]; ctx->pattern += ctx->pattern[0]) {
- if (ctx->pattern[1] == SRE_OP_LITERAL &&
- (ctx->ptr >= end ||
- (SRE_CODE) *ctx->ptr != ctx->pattern[2]))
- continue;
- if (ctx->pattern[1] == SRE_OP_IN &&
- (ctx->ptr >= end ||
- !SRE(charset)(ctx->pattern + 3, (SRE_CODE) *ctx->ptr)))
- continue;
- state->ptr = ctx->ptr;
- DO_JUMP(JUMP_BRANCH, jump_branch, ctx->pattern+1);
- if (ret) {
- if (ctx->u.rep)
- MARK_POP_DISCARD(ctx->lastmark);
- RETURN_ON_ERROR(ret);
- RETURN_SUCCESS;
- }
- if (ctx->u.rep)
- MARK_POP_KEEP(ctx->lastmark);
- LASTMARK_RESTORE();
- }
- if (ctx->u.rep)
- MARK_POP_DISCARD(ctx->lastmark);
- RETURN_FAILURE;
-
- case SRE_OP_REPEAT_ONE:
- /* match repeated sequence (maximizing regexp) */
-
- /* this operator only works if the repeated item is
- exactly one character wide, and we're not already
- collecting backtracking points. for other cases,
- use the MAX_REPEAT operator */
-
- /* <REPEAT_ONE> <skip> <1=min> <2=max> item <SUCCESS> tail */
-
- TRACE(("|%p|%p|REPEAT_ONE %d %d\n", ctx->pattern, ctx->ptr,
- ctx->pattern[1], ctx->pattern[2]));
-
- if ((Py_ssize_t) ctx->pattern[1] > end - ctx->ptr)
- RETURN_FAILURE; /* cannot match */
-
- state->ptr = ctx->ptr;
-
- ret = SRE(count)(state, ctx->pattern+3, ctx->pattern[2]);
- RETURN_ON_ERROR(ret);
- DATA_LOOKUP_AT(SRE(match_context), ctx, ctx_pos);
- ctx->count = ret;
- ctx->ptr += ctx->count;
-
- /* when we arrive here, count contains the number of
- matches, and ctx->ptr points to the tail of the target
- string. check if the rest of the pattern matches,
- and backtrack if not. */
-
- if (ctx->count < (Py_ssize_t) ctx->pattern[1])
- RETURN_FAILURE;
-
- if (ctx->pattern[ctx->pattern[0]] == SRE_OP_SUCCESS) {
- /* tail is empty. we're finished */
- state->ptr = ctx->ptr;
- RETURN_SUCCESS;
- }
-
- LASTMARK_SAVE();
-
- if (ctx->pattern[ctx->pattern[0]] == SRE_OP_LITERAL) {
- /* tail starts with a literal. skip positions where
- the rest of the pattern cannot possibly match */
- ctx->u.chr = ctx->pattern[ctx->pattern[0]+1];
- for (;;) {
- while (ctx->count >= (Py_ssize_t) ctx->pattern[1] &&
- (ctx->ptr >= end || *ctx->ptr != ctx->u.chr)) {
- ctx->ptr--;
- ctx->count--;
- }
- if (ctx->count < (Py_ssize_t) ctx->pattern[1])
- break;
- state->ptr = ctx->ptr;
- DO_JUMP(JUMP_REPEAT_ONE_1, jump_repeat_one_1,
- ctx->pattern+ctx->pattern[0]);
- if (ret) {
- RETURN_ON_ERROR(ret);
- RETURN_SUCCESS;
- }
-
- LASTMARK_RESTORE();
-
- ctx->ptr--;
- ctx->count--;
- }
-
- } else {
- /* general case */
- while (ctx->count >= (Py_ssize_t) ctx->pattern[1]) {
- state->ptr = ctx->ptr;
- DO_JUMP(JUMP_REPEAT_ONE_2, jump_repeat_one_2,
- ctx->pattern+ctx->pattern[0]);
- if (ret) {
- RETURN_ON_ERROR(ret);
- RETURN_SUCCESS;
- }
- ctx->ptr--;
- ctx->count--;
- LASTMARK_RESTORE();
- }
- }
- RETURN_FAILURE;
-
- case SRE_OP_MIN_REPEAT_ONE:
- /* match repeated sequence (minimizing regexp) */
-
- /* this operator only works if the repeated item is
- exactly one character wide, and we're not already
- collecting backtracking points. for other cases,
- use the MIN_REPEAT operator */
-
- /* <MIN_REPEAT_ONE> <skip> <1=min> <2=max> item <SUCCESS> tail */
-
- TRACE(("|%p|%p|MIN_REPEAT_ONE %d %d\n", ctx->pattern, ctx->ptr,
- ctx->pattern[1], ctx->pattern[2]));
-
- if ((Py_ssize_t) ctx->pattern[1] > end - ctx->ptr)
- RETURN_FAILURE; /* cannot match */
-
- state->ptr = ctx->ptr;
-
- if (ctx->pattern[1] == 0)
- ctx->count = 0;
- else {
- /* count using pattern min as the maximum */
- ret = SRE(count)(state, ctx->pattern+3, ctx->pattern[1]);
- RETURN_ON_ERROR(ret);
- DATA_LOOKUP_AT(SRE(match_context), ctx, ctx_pos);
- if (ret < (Py_ssize_t) ctx->pattern[1])
- /* didn't match minimum number of times */
- RETURN_FAILURE;
- /* advance past minimum matches of repeat */
- ctx->count = ret;
- ctx->ptr += ctx->count;
- }
-
- if (ctx->pattern[ctx->pattern[0]] == SRE_OP_SUCCESS) {
- /* tail is empty. we're finished */
- state->ptr = ctx->ptr;
- RETURN_SUCCESS;
-
- } else {
- /* general case */
- LASTMARK_SAVE();
- while ((Py_ssize_t)ctx->pattern[2] == SRE_MAXREPEAT
- || ctx->count <= (Py_ssize_t)ctx->pattern[2]) {
- state->ptr = ctx->ptr;
- DO_JUMP(JUMP_MIN_REPEAT_ONE,jump_min_repeat_one,
- ctx->pattern+ctx->pattern[0]);
- if (ret) {
- RETURN_ON_ERROR(ret);
- RETURN_SUCCESS;
- }
- state->ptr = ctx->ptr;
- ret = SRE(count)(state, ctx->pattern+3, 1);
- RETURN_ON_ERROR(ret);
- DATA_LOOKUP_AT(SRE(match_context), ctx, ctx_pos);
- if (ret == 0)
- break;
- assert(ret == 1);
- ctx->ptr++;
- ctx->count++;
- LASTMARK_RESTORE();
- }
- }
- RETURN_FAILURE;
-
- case SRE_OP_REPEAT:
- /* create repeat context. all the hard work is done
- by the UNTIL operator (MAX_UNTIL, MIN_UNTIL) */
- /* <REPEAT> <skip> <1=min> <2=max> item <UNTIL> tail */
- TRACE(("|%p|%p|REPEAT %d %d\n", ctx->pattern, ctx->ptr,
- ctx->pattern[1], ctx->pattern[2]));
-
- /* install new repeat context */
- ctx->u.rep = (SRE_REPEAT*) PyObject_MALLOC(sizeof(*ctx->u.rep));
- if (!ctx->u.rep) {
- PyErr_NoMemory();
- RETURN_FAILURE;
- }
- ctx->u.rep->count = -1;
- ctx->u.rep->pattern = ctx->pattern;
- ctx->u.rep->prev = state->repeat;
- ctx->u.rep->last_ptr = NULL;
- state->repeat = ctx->u.rep;
-
- state->ptr = ctx->ptr;
- DO_JUMP(JUMP_REPEAT, jump_repeat, ctx->pattern+ctx->pattern[0]);
- state->repeat = ctx->u.rep->prev;
- PyObject_FREE(ctx->u.rep);
-
- if (ret) {
- RETURN_ON_ERROR(ret);
- RETURN_SUCCESS;
- }
- RETURN_FAILURE;
-
- case SRE_OP_MAX_UNTIL:
- /* maximizing repeat */
- /* <REPEAT> <skip> <1=min> <2=max> item <MAX_UNTIL> tail */
-
- /* FIXME: we probably need to deal with zero-width
- matches in here... */
-
- ctx->u.rep = state->repeat;
- if (!ctx->u.rep)
- RETURN_ERROR(SRE_ERROR_STATE);
-
- state->ptr = ctx->ptr;
-
- ctx->count = ctx->u.rep->count+1;
-
- TRACE(("|%p|%p|MAX_UNTIL %" PY_FORMAT_SIZE_T "d\n", ctx->pattern,
- ctx->ptr, ctx->count));
-
- if (ctx->count < (Py_ssize_t) ctx->u.rep->pattern[1]) {
- /* not enough matches */
- ctx->u.rep->count = ctx->count;
- DO_JUMP(JUMP_MAX_UNTIL_1, jump_max_until_1,
- ctx->u.rep->pattern+3);
- if (ret) {
- RETURN_ON_ERROR(ret);
- RETURN_SUCCESS;
- }
- ctx->u.rep->count = ctx->count-1;
- state->ptr = ctx->ptr;
- RETURN_FAILURE;
- }
-
- if ((ctx->count < (Py_ssize_t) ctx->u.rep->pattern[2] ||
- ctx->u.rep->pattern[2] == SRE_MAXREPEAT) &&
- state->ptr != ctx->u.rep->last_ptr) {
- /* we may have enough matches, but if we can
- match another item, do so */
- ctx->u.rep->count = ctx->count;
- LASTMARK_SAVE();
- MARK_PUSH(ctx->lastmark);
- /* zero-width match protection */
- DATA_PUSH(&ctx->u.rep->last_ptr);
- ctx->u.rep->last_ptr = state->ptr;
- DO_JUMP(JUMP_MAX_UNTIL_2, jump_max_until_2,
- ctx->u.rep->pattern+3);
- DATA_POP(&ctx->u.rep->last_ptr);
- if (ret) {
- MARK_POP_DISCARD(ctx->lastmark);
- RETURN_ON_ERROR(ret);
- RETURN_SUCCESS;
- }
- MARK_POP(ctx->lastmark);
- LASTMARK_RESTORE();
- ctx->u.rep->count = ctx->count-1;
- state->ptr = ctx->ptr;
- }
-
- /* cannot match more repeated items here. make sure the
- tail matches */
- state->repeat = ctx->u.rep->prev;
- DO_JUMP(JUMP_MAX_UNTIL_3, jump_max_until_3, ctx->pattern);
- RETURN_ON_SUCCESS(ret);
- state->repeat = ctx->u.rep;
- state->ptr = ctx->ptr;
- RETURN_FAILURE;
-
- case SRE_OP_MIN_UNTIL:
- /* minimizing repeat */
- /* <REPEAT> <skip> <1=min> <2=max> item <MIN_UNTIL> tail */
-
- ctx->u.rep = state->repeat;
- if (!ctx->u.rep)
- RETURN_ERROR(SRE_ERROR_STATE);
-
- state->ptr = ctx->ptr;
-
- ctx->count = ctx->u.rep->count+1;
-
- TRACE(("|%p|%p|MIN_UNTIL %" PY_FORMAT_SIZE_T "d %p\n", ctx->pattern,
- ctx->ptr, ctx->count, ctx->u.rep->pattern));
-
- if (ctx->count < (Py_ssize_t) ctx->u.rep->pattern[1]) {
- /* not enough matches */
- ctx->u.rep->count = ctx->count;
- DO_JUMP(JUMP_MIN_UNTIL_1, jump_min_until_1,
- ctx->u.rep->pattern+3);
- if (ret) {
- RETURN_ON_ERROR(ret);
- RETURN_SUCCESS;
- }
- ctx->u.rep->count = ctx->count-1;
- state->ptr = ctx->ptr;
- RETURN_FAILURE;
- }
-
- LASTMARK_SAVE();
-
- /* see if the tail matches */
- state->repeat = ctx->u.rep->prev;
- DO_JUMP(JUMP_MIN_UNTIL_2, jump_min_until_2, ctx->pattern);
- if (ret) {
- RETURN_ON_ERROR(ret);
- RETURN_SUCCESS;
- }
-
- state->repeat = ctx->u.rep;
- state->ptr = ctx->ptr;
-
- LASTMARK_RESTORE();
-
- if ((ctx->count >= (Py_ssize_t) ctx->u.rep->pattern[2]
- && ctx->u.rep->pattern[2] != SRE_MAXREPEAT) ||
- state->ptr == ctx->u.rep->last_ptr)
- RETURN_FAILURE;
-
- ctx->u.rep->count = ctx->count;
- /* zero-width match protection */
- DATA_PUSH(&ctx->u.rep->last_ptr);
- ctx->u.rep->last_ptr = state->ptr;
- DO_JUMP(JUMP_MIN_UNTIL_3,jump_min_until_3,
- ctx->u.rep->pattern+3);
- DATA_POP(&ctx->u.rep->last_ptr);
- if (ret) {
- RETURN_ON_ERROR(ret);
- RETURN_SUCCESS;
- }
- ctx->u.rep->count = ctx->count-1;
- state->ptr = ctx->ptr;
- RETURN_FAILURE;
-
- case SRE_OP_GROUPREF:
- /* match backreference */
- TRACE(("|%p|%p|GROUPREF %d\n", ctx->pattern,
- ctx->ptr, ctx->pattern[0]));
- i = ctx->pattern[0];
- {
- Py_ssize_t groupref = i+i;
- if (groupref >= state->lastmark) {
- RETURN_FAILURE;
- } else {
- SRE_CHAR* p = (SRE_CHAR*) state->mark[groupref];
- SRE_CHAR* e = (SRE_CHAR*) state->mark[groupref+1];
- if (!p || !e || e < p)
- RETURN_FAILURE;
- while (p < e) {
- if (ctx->ptr >= end || *ctx->ptr != *p)
- RETURN_FAILURE;
- p++;
- ctx->ptr++;
- }
- }
- }
- ctx->pattern++;
- break;
-
- case SRE_OP_GROUPREF_IGNORE:
- /* match backreference */
- TRACE(("|%p|%p|GROUPREF_IGNORE %d\n", ctx->pattern,
- ctx->ptr, ctx->pattern[0]));
- i = ctx->pattern[0];
- {
- Py_ssize_t groupref = i+i;
- if (groupref >= state->lastmark) {
- RETURN_FAILURE;
- } else {
- SRE_CHAR* p = (SRE_CHAR*) state->mark[groupref];
- SRE_CHAR* e = (SRE_CHAR*) state->mark[groupref+1];
- if (!p || !e || e < p)
- RETURN_FAILURE;
- while (p < e) {
- if (ctx->ptr >= end ||
- state->lower(*ctx->ptr) != state->lower(*p))
- RETURN_FAILURE;
- p++;
- ctx->ptr++;
- }
- }
- }
- ctx->pattern++;
- break;
-
- case SRE_OP_GROUPREF_EXISTS:
- TRACE(("|%p|%p|GROUPREF_EXISTS %d\n", ctx->pattern,
- ctx->ptr, ctx->pattern[0]));
- /* <GROUPREF_EXISTS> <group> <skip> codeyes <JUMP> codeno ... */
- i = ctx->pattern[0];
- {
- Py_ssize_t groupref = i+i;
- if (groupref >= state->lastmark) {
- ctx->pattern += ctx->pattern[1];
- break;
- } else {
- SRE_CHAR* p = (SRE_CHAR*) state->mark[groupref];
- SRE_CHAR* e = (SRE_CHAR*) state->mark[groupref+1];
- if (!p || !e || e < p) {
- ctx->pattern += ctx->pattern[1];
- break;
- }
- }
- }
- ctx->pattern += 2;
- break;
-
- case SRE_OP_ASSERT:
- /* assert subpattern */
- /* <ASSERT> <skip> <back> <pattern> */
- TRACE(("|%p|%p|ASSERT %d\n", ctx->pattern,
- ctx->ptr, ctx->pattern[1]));
- state->ptr = ctx->ptr - ctx->pattern[1];
- if (state->ptr < state->beginning)
- RETURN_FAILURE;
- DO_JUMP(JUMP_ASSERT, jump_assert, ctx->pattern+2);
- RETURN_ON_FAILURE(ret);
- ctx->pattern += ctx->pattern[0];
- break;
-
- case SRE_OP_ASSERT_NOT:
- /* assert not subpattern */
- /* <ASSERT_NOT> <skip> <back> <pattern> */
- TRACE(("|%p|%p|ASSERT_NOT %d\n", ctx->pattern,
- ctx->ptr, ctx->pattern[1]));
- state->ptr = ctx->ptr - ctx->pattern[1];
- if (state->ptr >= state->beginning) {
- DO_JUMP(JUMP_ASSERT_NOT, jump_assert_not, ctx->pattern+2);
- if (ret) {
- RETURN_ON_ERROR(ret);
- RETURN_FAILURE;
- }
- }
- ctx->pattern += ctx->pattern[0];
- break;
-
- case SRE_OP_FAILURE:
- /* immediate failure */
- TRACE(("|%p|%p|FAILURE\n", ctx->pattern, ctx->ptr));
- RETURN_FAILURE;
-
- default:
- TRACE(("|%p|%p|UNKNOWN %d\n", ctx->pattern, ctx->ptr,
- ctx->pattern[-1]));
- RETURN_ERROR(SRE_ERROR_ILLEGAL);
- }
- }
-
-exit:
- ctx_pos = ctx->last_ctx_pos;
- jump = ctx->jump;
- DATA_POP_DISCARD(ctx);
- if (ctx_pos == -1)
- return ret;
- DATA_LOOKUP_AT(SRE(match_context), ctx, ctx_pos);
-
- switch (jump) {
- case JUMP_MAX_UNTIL_2:
- TRACE(("|%p|%p|JUMP_MAX_UNTIL_2\n", ctx->pattern, ctx->ptr));
- goto jump_max_until_2;
- case JUMP_MAX_UNTIL_3:
- TRACE(("|%p|%p|JUMP_MAX_UNTIL_3\n", ctx->pattern, ctx->ptr));
- goto jump_max_until_3;
- case JUMP_MIN_UNTIL_2:
- TRACE(("|%p|%p|JUMP_MIN_UNTIL_2\n", ctx->pattern, ctx->ptr));
- goto jump_min_until_2;
- case JUMP_MIN_UNTIL_3:
- TRACE(("|%p|%p|JUMP_MIN_UNTIL_3\n", ctx->pattern, ctx->ptr));
- goto jump_min_until_3;
- case JUMP_BRANCH:
- TRACE(("|%p|%p|JUMP_BRANCH\n", ctx->pattern, ctx->ptr));
- goto jump_branch;
- case JUMP_MAX_UNTIL_1:
- TRACE(("|%p|%p|JUMP_MAX_UNTIL_1\n", ctx->pattern, ctx->ptr));
- goto jump_max_until_1;
- case JUMP_MIN_UNTIL_1:
- TRACE(("|%p|%p|JUMP_MIN_UNTIL_1\n", ctx->pattern, ctx->ptr));
- goto jump_min_until_1;
- case JUMP_REPEAT:
- TRACE(("|%p|%p|JUMP_REPEAT\n", ctx->pattern, ctx->ptr));
- goto jump_repeat;
- case JUMP_REPEAT_ONE_1:
- TRACE(("|%p|%p|JUMP_REPEAT_ONE_1\n", ctx->pattern, ctx->ptr));
- goto jump_repeat_one_1;
- case JUMP_REPEAT_ONE_2:
- TRACE(("|%p|%p|JUMP_REPEAT_ONE_2\n", ctx->pattern, ctx->ptr));
- goto jump_repeat_one_2;
- case JUMP_MIN_REPEAT_ONE:
- TRACE(("|%p|%p|JUMP_MIN_REPEAT_ONE\n", ctx->pattern, ctx->ptr));
- goto jump_min_repeat_one;
- case JUMP_ASSERT:
- TRACE(("|%p|%p|JUMP_ASSERT\n", ctx->pattern, ctx->ptr));
- goto jump_assert;
- case JUMP_ASSERT_NOT:
- TRACE(("|%p|%p|JUMP_ASSERT_NOT\n", ctx->pattern, ctx->ptr));
- goto jump_assert_not;
- case JUMP_NONE:
- TRACE(("|%p|%p|RETURN %" PY_FORMAT_SIZE_T "d\n", ctx->pattern,
- ctx->ptr, ret));
- break;
- }
-
- return ret; /* should never get here */
-}
-
-LOCAL(Py_ssize_t)
-SRE(search)(SRE_STATE* state, SRE_CODE* pattern)
-{
- SRE_CHAR* ptr = (SRE_CHAR *)state->start;
- SRE_CHAR* end = (SRE_CHAR *)state->end;
- Py_ssize_t status = 0;
- Py_ssize_t prefix_len = 0;
- Py_ssize_t prefix_skip = 0;
- SRE_CODE* prefix = NULL;
- SRE_CODE* charset = NULL;
- SRE_CODE* overlap = NULL;
- int flags = 0;
-
- if (pattern[0] == SRE_OP_INFO) {
- /* optimization info block */
- /* <INFO> <1=skip> <2=flags> <3=min> <4=max> <5=prefix info> */
-
- flags = pattern[2];
-
- if (pattern[3] > 1) {
- /* adjust end point (but make sure we leave at least one
- character in there, so literal search will work) */
- end -= pattern[3] - 1;
- if (end <= ptr)
- end = ptr;
- }
-
- if (flags & SRE_INFO_PREFIX) {
- /* pattern starts with a known prefix */
- /* <length> <skip> <prefix data> <overlap data> */
- prefix_len = pattern[5];
- 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 %" PY_FORMAT_SIZE_T "d %" PY_FORMAT_SIZE_T "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
- table to skip forward as fast as we possibly can */
- Py_ssize_t i = 0;
-
- end = (SRE_CHAR *)state->end;
- if (prefix_len > end - ptr)
- return 0;
-#if SIZEOF_SRE_CHAR < 4
- for (i = 0; i < prefix_len; i++)
- if ((SRE_CODE)(SRE_CHAR) prefix[i] != prefix[i])
- return 0; /* literal can't match: doesn't fit in char width */
-#endif
- while (ptr < end) {
- SRE_CHAR c = (SRE_CHAR) prefix[0];
- while (*ptr++ != c) {
- if (ptr >= end)
- return 0;
- }
- if (ptr >= end)
- return 0;
-
- i = 1;
- do {
- if (*ptr == (SRE_CHAR) prefix[i]) {
- if (++i != prefix_len) {
- if (++ptr >= end)
- return 0;
- continue;
- }
- /* found a potential match */
- TRACE(("|%p|%p|SEARCH SCAN\n", pattern, ptr));
- state->start = ptr - (prefix_len - 1);
- state->ptr = ptr - (prefix_len - prefix_skip - 1);
- if (flags & SRE_INFO_LITERAL)
- return 1; /* we got all of it */
- status = SRE(match)(state, pattern + 2*prefix_skip);
- if (status != 0)
- return status;
- /* close but no cigar -- try again */
- if (++ptr >= end)
- return 0;
- }
- i = overlap[i];
- } while (i != 0);
- }
- return 0;
- }
-#endif
-
- if (pattern[0] == SRE_OP_LITERAL) {
- /* pattern starts with a literal character. this is used
- for short prefixes, and if fast search is disabled */
- SRE_CHAR c = (SRE_CHAR) pattern[1];
-#if SIZEOF_SRE_CHAR < 4
- if ((SRE_CODE) c != pattern[1])
- return 0; /* literal can't match: doesn't fit in char width */
-#endif
- end = (SRE_CHAR *)state->end;
- while (ptr < end) {
- while (*ptr != c) {
- if (++ptr >= end)
- return 0;
- }
- TRACE(("|%p|%p|SEARCH LITERAL\n", pattern, ptr));
- state->start = ptr;
- state->ptr = ++ptr;
- if (flags & SRE_INFO_LITERAL)
- return 1; /* we got all of it */
- status = SRE(match)(state, pattern + 2);
- if (status != 0)
- break;
- }
- } else if (charset) {
- /* pattern starts with a character from a known set */
- end = (SRE_CHAR *)state->end;
- for (;;) {
- while (ptr < end && !SRE(charset)(charset, *ptr))
- ptr++;
- if (ptr >= end)
- return 0;
- TRACE(("|%p|%p|SEARCH CHARSET\n", pattern, ptr));
- state->start = ptr;
- state->ptr = ptr;
- status = SRE(match)(state, pattern);
- if (status != 0)
- break;
- ptr++;
- }
- } else
- /* general case */
- while (ptr <= end) {
- TRACE(("|%p|%p|SEARCH\n", pattern, ptr));
- state->start = state->ptr = ptr++;
- status = SRE(match)(state, pattern);
- if (status != 0)
- break;
- }
-
- return status;
-}
-
-#endif /* SRE_RECURSIVE */
-
-#ifndef SRE_RECURSIVE
+#include "sre_lib.h"
/* -------------------------------------------------------------------- */
/* factories and destructors */
@@ -3915,14 +2588,5 @@ PyMODINIT_FUNC PyInit__sre(void)
return m;
}
-#endif /* !defined(SRE_RECURSIVE) */
-
-#ifdef SRE_RECURSIVE
-# undef SRE_RECURSIVE
-# undef SRE_CHAR
-# undef SIZEOF_SRE_CHAR
-# undef SRE
-#endif /* SRE_RECURSIVE */
-
/* vim:ts=4:sw=4:et
*/
generated by cgit v0.12 at 2024-11-24 12:53:47 (GMT)