summaryrefslogtreecommitdiff
path: root/sys/src/cmd/python/Modules/_sre.c
diff options
context:
space:
mode:
authorOri Bernstein <ori@eigenstate.org>2021-06-14 00:00:37 +0000
committerOri Bernstein <ori@eigenstate.org>2021-06-14 00:00:37 +0000
commita73a964e51247ed169d322c725a3a18859f109a3 (patch)
tree3f752d117274d444bda44e85609aeac1acf313f3 /sys/src/cmd/python/Modules/_sre.c
parente64efe273fcb921a61bf27d33b230c4e64fcd425 (diff)
python, hg: tow outside the environment.
they've served us well, and can ride off into the sunset.
Diffstat (limited to 'sys/src/cmd/python/Modules/_sre.c')
-rw-r--r--sys/src/cmd/python/Modules/_sre.c3429
1 files changed, 0 insertions, 3429 deletions
diff --git a/sys/src/cmd/python/Modules/_sre.c b/sys/src/cmd/python/Modules/_sre.c
deleted file mode 100644
index c1eb71cf2..000000000
--- a/sys/src/cmd/python/Modules/_sre.c
+++ /dev/null
@@ -1,3429 +0,0 @@
-/*
- * Secret Labs' Regular Expression Engine
- *
- * regular expression matching engine
- *
- * partial history:
- * 1999-10-24 fl created (based on existing template matcher code)
- * 2000-03-06 fl first alpha, sort of
- * 2000-08-01 fl fixes for 1.6b1
- * 2000-08-07 fl use PyOS_CheckStack() if available
- * 2000-09-20 fl added expand method
- * 2001-03-20 fl lots of fixes for 2.1b2
- * 2001-04-15 fl export copyright as Python attribute, not global
- * 2001-04-28 fl added __copy__ methods (work in progress)
- * 2001-05-14 fl fixes for 1.5.2 compatibility
- * 2001-07-01 fl added BIGCHARSET support (from Martin von Loewis)
- * 2001-10-18 fl fixed group reset issue (from Matthew Mueller)
- * 2001-10-20 fl added split primitive; reenable unicode for 1.6/2.0/2.1
- * 2001-10-21 fl added sub/subn primitive
- * 2001-10-24 fl added finditer primitive (for 2.2 only)
- * 2001-12-07 fl fixed memory leak in sub/subn (Guido van Rossum)
- * 2002-11-09 fl fixed empty sub/subn return type
- * 2003-04-18 mvl fully support 4-byte codes
- * 2003-10-17 gn implemented non recursive scheme
- *
- * Copyright (c) 1997-2001 by Secret Labs AB. All rights reserved.
- *
- * This version of the SRE library can be redistributed under CNRI's
- * Python 1.6 license. For any other use, please contact Secret Labs
- * AB (info@pythonware.com).
- *
- * Portions of this engine have been developed in cooperation with
- * CNRI. Hewlett-Packard provided funding for 1.6 integration and
- * other compatibility work.
- */
-
-#ifndef SRE_RECURSIVE
-
-static char copyright[] =
- " SRE 2.2.2 Copyright (c) 1997-2002 by Secret Labs AB ";
-
-#define PY_SSIZE_T_CLEAN
-
-#include "Python.h"
-#include "structmember.h" /* offsetof */
-
-#include "sre.h"
-
-#include <ctype.h>
-
-/* name of this module, minus the leading underscore */
-#if !defined(SRE_MODULE)
-#define SRE_MODULE "sre"
-#endif
-
-#define SRE_PY_MODULE "re"
-
-/* defining this one enables tracing */
-#undef VERBOSE
-
-#if PY_VERSION_HEX >= 0x01060000
-#if PY_VERSION_HEX < 0x02020000 || defined(Py_USING_UNICODE)
-/* defining this enables unicode support (default under 1.6a1 and later) */
-#define HAVE_UNICODE
-#endif
-#endif
-
-/* -------------------------------------------------------------------- */
-/* optional features */
-
-/* enables fast searching */
-#define USE_FAST_SEARCH
-
-/* enables aggressive inlining (always on for Visual C) */
-#undef USE_INLINE
-
-/* enables copy/deepcopy handling (work in progress) */
-#undef USE_BUILTIN_COPY
-
-#if PY_VERSION_HEX < 0x01060000
-#define PyObject_DEL(op) PyMem_DEL((op))
-#endif
-
-/* -------------------------------------------------------------------- */
-
-#if defined(_MSC_VER)
-#pragma optimize("agtw", on) /* doesn't seem to make much difference... */
-#pragma warning(disable: 4710) /* who cares if functions are not inlined ;-) */
-/* fastest possible local call under MSVC */
-#define LOCAL(type) static __inline type __fastcall
-#elif defined(USE_INLINE)
-#define LOCAL(type) static inline type
-#else
-#define LOCAL(type) static type
-#endif
-
-/* error codes */
-#define SRE_ERROR_ILLEGAL -1 /* illegal opcode */
-#define SRE_ERROR_STATE -2 /* illegal state */
-#define SRE_ERROR_RECURSION_LIMIT -3 /* runaway recursion */
-#define SRE_ERROR_MEMORY -9 /* out of memory */
-
-#if defined(VERBOSE)
-#define TRACE(v) printf v
-#else
-#define TRACE(v)
-#endif
-
-/* -------------------------------------------------------------------- */
-/* search engine state */
-
-/* default character predicates (run sre_chars.py to regenerate tables) */
-
-#define SRE_DIGIT_MASK 1
-#define SRE_SPACE_MASK 2
-#define SRE_LINEBREAK_MASK 4
-#define SRE_ALNUM_MASK 8
-#define SRE_WORD_MASK 16
-
-/* FIXME: this assumes ASCII. create tables in init_sre() instead */
-
-static char sre_char_info[128] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 6, 2,
-2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0,
-0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 25, 25, 25, 25, 25, 25, 25, 25,
-25, 25, 0, 0, 0, 0, 0, 0, 0, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
-24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 0, 0,
-0, 0, 16, 0, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
-24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 0, 0, 0, 0, 0 };
-
-static char sre_char_lower[128] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
-10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,
-27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43,
-44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60,
-61, 62, 63, 64, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107,
-108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121,
-122, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105,
-106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119,
-120, 121, 122, 123, 124, 125, 126, 127 };
-
-#define SRE_IS_DIGIT(ch)\
- ((ch) < 128 ? (sre_char_info[(ch)] & SRE_DIGIT_MASK) : 0)
-#define SRE_IS_SPACE(ch)\
- ((ch) < 128 ? (sre_char_info[(ch)] & SRE_SPACE_MASK) : 0)
-#define SRE_IS_LINEBREAK(ch)\
- ((ch) < 128 ? (sre_char_info[(ch)] & SRE_LINEBREAK_MASK) : 0)
-#define SRE_IS_ALNUM(ch)\
- ((ch) < 128 ? (sre_char_info[(ch)] & SRE_ALNUM_MASK) : 0)
-#define SRE_IS_WORD(ch)\
- ((ch) < 128 ? (sre_char_info[(ch)] & SRE_WORD_MASK) : 0)
-
-static unsigned int sre_lower(unsigned int ch)
-{
- return ((ch) < 128 ? (unsigned int)sre_char_lower[ch] : ch);
-}
-
-/* locale-specific character predicates */
-/* !(c & ~N) == (c < N+1) for any unsigned c, this avoids
- * warnings when c's type supports only numbers < N+1 */
-#define SRE_LOC_IS_DIGIT(ch) (!((ch) & ~255) ? isdigit((ch)) : 0)
-#define SRE_LOC_IS_SPACE(ch) (!((ch) & ~255) ? isspace((ch)) : 0)
-#define SRE_LOC_IS_LINEBREAK(ch) ((ch) == '\n')
-#define SRE_LOC_IS_ALNUM(ch) (!((ch) & ~255) ? isalnum((ch)) : 0)
-#define SRE_LOC_IS_WORD(ch) (SRE_LOC_IS_ALNUM((ch)) || (ch) == '_')
-
-static unsigned int sre_lower_locale(unsigned int ch)
-{
- return ((ch) < 256 ? (unsigned int)tolower((ch)) : ch);
-}
-
-/* unicode-specific character predicates */
-
-#if defined(HAVE_UNICODE)
-
-#define SRE_UNI_IS_DIGIT(ch) Py_UNICODE_ISDIGIT((Py_UNICODE)(ch))
-#define SRE_UNI_IS_SPACE(ch) Py_UNICODE_ISSPACE((Py_UNICODE)(ch))
-#define SRE_UNI_IS_LINEBREAK(ch) Py_UNICODE_ISLINEBREAK((Py_UNICODE)(ch))
-#define SRE_UNI_IS_ALNUM(ch) Py_UNICODE_ISALNUM((Py_UNICODE)(ch))
-#define SRE_UNI_IS_WORD(ch) (SRE_UNI_IS_ALNUM((ch)) || (ch) == '_')
-
-static unsigned int sre_lower_unicode(unsigned int ch)
-{
- return (unsigned int) Py_UNICODE_TOLOWER((Py_UNICODE)(ch));
-}
-
-#endif
-
-LOCAL(int)
-sre_category(SRE_CODE category, unsigned int ch)
-{
- switch (category) {
-
- case SRE_CATEGORY_DIGIT:
- return SRE_IS_DIGIT(ch);
- case SRE_CATEGORY_NOT_DIGIT:
- return !SRE_IS_DIGIT(ch);
- case SRE_CATEGORY_SPACE:
- return SRE_IS_SPACE(ch);
- case SRE_CATEGORY_NOT_SPACE:
- return !SRE_IS_SPACE(ch);
- case SRE_CATEGORY_WORD:
- return SRE_IS_WORD(ch);
- case SRE_CATEGORY_NOT_WORD:
- return !SRE_IS_WORD(ch);
- case SRE_CATEGORY_LINEBREAK:
- return SRE_IS_LINEBREAK(ch);
- case SRE_CATEGORY_NOT_LINEBREAK:
- return !SRE_IS_LINEBREAK(ch);
-
- case SRE_CATEGORY_LOC_WORD:
- return SRE_LOC_IS_WORD(ch);
- case SRE_CATEGORY_LOC_NOT_WORD:
- return !SRE_LOC_IS_WORD(ch);
-
-#if defined(HAVE_UNICODE)
- case SRE_CATEGORY_UNI_DIGIT:
- return SRE_UNI_IS_DIGIT(ch);
- case SRE_CATEGORY_UNI_NOT_DIGIT:
- return !SRE_UNI_IS_DIGIT(ch);
- case SRE_CATEGORY_UNI_SPACE:
- return SRE_UNI_IS_SPACE(ch);
- case SRE_CATEGORY_UNI_NOT_SPACE:
- return !SRE_UNI_IS_SPACE(ch);
- case SRE_CATEGORY_UNI_WORD:
- return SRE_UNI_IS_WORD(ch);
- case SRE_CATEGORY_UNI_NOT_WORD:
- return !SRE_UNI_IS_WORD(ch);
- case SRE_CATEGORY_UNI_LINEBREAK:
- return SRE_UNI_IS_LINEBREAK(ch);
- case SRE_CATEGORY_UNI_NOT_LINEBREAK:
- return !SRE_UNI_IS_LINEBREAK(ch);
-#else
- case SRE_CATEGORY_UNI_DIGIT:
- return SRE_IS_DIGIT(ch);
- case SRE_CATEGORY_UNI_NOT_DIGIT:
- return !SRE_IS_DIGIT(ch);
- case SRE_CATEGORY_UNI_SPACE:
- return SRE_IS_SPACE(ch);
- case SRE_CATEGORY_UNI_NOT_SPACE:
- return !SRE_IS_SPACE(ch);
- case SRE_CATEGORY_UNI_WORD:
- return SRE_LOC_IS_WORD(ch);
- case SRE_CATEGORY_UNI_NOT_WORD:
- return !SRE_LOC_IS_WORD(ch);
- case SRE_CATEGORY_UNI_LINEBREAK:
- return SRE_IS_LINEBREAK(ch);
- case SRE_CATEGORY_UNI_NOT_LINEBREAK:
- return !SRE_IS_LINEBREAK(ch);
-#endif
- }
- return 0;
-}
-
-/* helpers */
-
-static void
-data_stack_dealloc(SRE_STATE* state)
-{
- if (state->data_stack) {
- PyMem_FREE(state->data_stack);
- state->data_stack = NULL;
- }
- state->data_stack_size = state->data_stack_base = 0;
-}
-
-static int
-data_stack_grow(SRE_STATE* state, Py_ssize_t size)
-{
- Py_ssize_t minsize, cursize;
- minsize = state->data_stack_base+size;
- cursize = state->data_stack_size;
- if (cursize < minsize) {
- void* stack;
- cursize = minsize+minsize/4+1024;
- TRACE(("allocate/grow stack %d\n", cursize));
- stack = PyMem_REALLOC(state->data_stack, cursize);
- if (!stack) {
- data_stack_dealloc(state);
- return SRE_ERROR_MEMORY;
- }
- state->data_stack = (char *)stack;
- state->data_stack_size = cursize;
- }
- return 0;
-}
-
-/* generate 8-bit version */
-
-#define SRE_CHAR unsigned char
-#define SRE_AT sre_at
-#define SRE_COUNT sre_count
-#define SRE_CHARSET sre_charset
-#define SRE_INFO sre_info
-#define SRE_MATCH sre_match
-#define SRE_MATCH_CONTEXT sre_match_context
-#define SRE_SEARCH sre_search
-#define SRE_LITERAL_TEMPLATE sre_literal_template
-
-#if defined(HAVE_UNICODE)
-
-#define SRE_RECURSIVE
-#include "_sre.c"
-#undef SRE_RECURSIVE
-
-#undef SRE_LITERAL_TEMPLATE
-#undef SRE_SEARCH
-#undef SRE_MATCH
-#undef SRE_MATCH_CONTEXT
-#undef SRE_INFO
-#undef SRE_CHARSET
-#undef SRE_COUNT
-#undef SRE_AT
-#undef SRE_CHAR
-
-/* generate 16-bit unicode version */
-
-#define SRE_CHAR Py_UNICODE
-#define SRE_AT sre_uat
-#define SRE_COUNT sre_ucount
-#define SRE_CHARSET sre_ucharset
-#define SRE_INFO sre_uinfo
-#define SRE_MATCH sre_umatch
-#define SRE_MATCH_CONTEXT sre_umatch_context
-#define SRE_SEARCH sre_usearch
-#define SRE_LITERAL_TEMPLATE sre_uliteral_template
-#endif
-
-#endif /* SRE_RECURSIVE */
-
-/* -------------------------------------------------------------------- */
-/* String matching engine */
-
-/* the following section is compiled twice, 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;
-
-#if defined(HAVE_UNICODE)
- 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;
-#endif
-
- }
-
- 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 += 1;
- break;
-
- case SRE_OP_CHARSET:
- if (sizeof(SRE_CODE) == 2) {
- /* <CHARSET> <bitmap> (16 bits per code word) */
- if (ch < 256 && (set[ch >> 4] & (1 << (ch & 15))))
- return ok;
- set += 16;
- }
- else {
- /* <CHARSET> <bitmap> (32 bits per code word) */
- if (ch < 256 && (set[ch >> 5] & (1 << (ch & 31))))
- return ok;
- set += 8;
- }
- 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 (sizeof(SRE_CODE) == 2) {
- block = ((unsigned char*)set)[ch >> 8];
- set += 128;
- if (set[block*16 + ((ch & 255)>>4)] & (1 << (ch & 15)))
- return ok;
- set += count*16;
- }
- else {
- /* !(c & ~N) == (c < N+1) for any unsigned c, this avoids
- * warnings when c's type supports only numbers < N+1 */
- if (!(ch & ~65535))
- block = ((unsigned char*)set)[ch >> 8];
- else
- block = -1;
- set += 64;
- if (block >=0 &&
- (set[block*8 + ((ch & 255)>>5)] & (1 << (ch & 31))))
- return ok;
- set += count*8;
- }
- 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* ptr = (SRE_CHAR *)state->ptr;
- SRE_CHAR* end = (SRE_CHAR *)state->end;
- Py_ssize_t i;
-
- /* adjust end */
- if (maxcount < end - ptr && maxcount != 65535)
- 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));
- while (ptr < end && (SRE_CODE) *ptr == chr)
- 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));
- while (ptr < end && (SRE_CODE) *ptr != chr)
- 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 %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;
-}
-
-#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 = state->end;
- SRE_CHAR* ptr = 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 %d (%d)\n", \
- SFY(type), alloc_pos, sizeof(type))); \
- if (state->data_stack_size < alloc_pos+sizeof(type)) { \
- 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 %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 %d (%d)\n", \
- data, state->data_stack_base, size)); \
- if (state->data_stack_size < state->data_stack_base+size) { \
- 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 %d (%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 %d (%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;
-
- 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] && (end - ctx->ptr) < ctx->pattern[3]) {
- TRACE(("reject (got %d chars, need %d)\n",
- (end - ctx->ptr), ctx->pattern[3]));
- RETURN_FAILURE;
- }
- ctx->pattern += ctx->pattern[1] + 1;
- }
-
- for (;;) {
-
- 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 (ctx->ptr + ctx->pattern[1] > end)
- 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 (ctx->ptr + ctx->pattern[1] > end)
- 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] == 65535
- || 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 %d\n", ctx->pattern,
- ctx->ptr, ctx->count));
-
- if (ctx->count < 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 < ctx->u.rep->pattern[2] ||
- ctx->u.rep->pattern[2] == 65535) &&
- 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 %d %p\n", ctx->pattern,
- ctx->ptr, ctx->count, ctx->u.rep->pattern));
-
- if (ctx->count < 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 >= ctx->u.rep->pattern[2]
- && ctx->u.rep->pattern[2] != 65535)
- RETURN_FAILURE;
-
- ctx->u.rep->count = ctx->count;
- DO_JUMP(JUMP_MIN_UNTIL_3,jump_min_until_3,
- 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;
-
- 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 %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+1;
- }
-
- 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 %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
- table to skip forward as fast as we possibly can */
- Py_ssize_t i = 0;
- end = (SRE_CHAR *)state->end;
- while (ptr < end) {
- for (;;) {
- if ((SRE_CODE) ptr[0] != prefix[i]) {
- if (!i)
- break;
- else
- i = overlap[i];
- } else {
- if (++i == prefix_len) {
- /* found a potential match */
- 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_skip);
- if (status != 0)
- return status;
- /* close but no cigar -- try again */
- i = overlap[i];
- }
- break;
- }
- }
- ptr++;
- }
- 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_CODE chr = pattern[1];
- end = (SRE_CHAR *)state->end;
- for (;;) {
- while (ptr < end && (SRE_CODE) ptr[0] != chr)
- ptr++;
- 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[0]))
- 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;
-}
-
-LOCAL(int)
-SRE_LITERAL_TEMPLATE(SRE_CHAR* ptr, Py_ssize_t len)
-{
- /* check if given string is a literal template (i.e. no escapes) */
- while (len-- > 0)
- if (*ptr++ == '\\')
- return 0;
- return 1;
-}
-
-#if !defined(SRE_RECURSIVE)
-
-/* -------------------------------------------------------------------- */
-/* factories and destructors */
-
-/* see sre.h for object declarations */
-static PyObject*pattern_new_match(PatternObject*, SRE_STATE*, int);
-static PyObject*pattern_scanner(PatternObject*, PyObject*);
-
-static PyObject *
-sre_codesize(PyObject* self, PyObject *unused)
-{
- return Py_BuildValue("l", sizeof(SRE_CODE));
-}
-
-static PyObject *
-sre_getlower(PyObject* self, PyObject* args)
-{
- int character, flags;
- if (!PyArg_ParseTuple(args, "ii", &character, &flags))
- return NULL;
- if (flags & SRE_FLAG_LOCALE)
- return Py_BuildValue("i", sre_lower_locale(character));
- if (flags & SRE_FLAG_UNICODE)
-#if defined(HAVE_UNICODE)
- return Py_BuildValue("i", sre_lower_unicode(character));
-#else
- return Py_BuildValue("i", sre_lower_locale(character));
-#endif
- return Py_BuildValue("i", sre_lower(character));
-}
-
-LOCAL(void)
-state_reset(SRE_STATE* state)
-{
- /* FIXME: dynamic! */
- /*memset(state->mark, 0, sizeof(*state->mark) * SRE_MARK_SIZE);*/
-
- state->lastmark = -1;
- state->lastindex = -1;
-
- state->repeat = NULL;
-
- data_stack_dealloc(state);
-}
-
-static void*
-getstring(PyObject* string, Py_ssize_t* p_length, int* p_charsize)
-{
- /* given a python object, return a data pointer, a length (in
- characters), and a character size. return NULL if the object
- is not a string (or not compatible) */
-
- PyBufferProcs *buffer;
- Py_ssize_t size, bytes;
- int charsize;
- void* ptr;
-
-#if defined(HAVE_UNICODE)
- if (PyUnicode_Check(string)) {
- /* unicode strings doesn't always support the buffer interface */
- ptr = (void*) PyUnicode_AS_DATA(string);
- bytes = PyUnicode_GET_DATA_SIZE(string);
- size = PyUnicode_GET_SIZE(string);
- charsize = sizeof(Py_UNICODE);
-
- } else {
-#endif
-
- /* get pointer to string buffer */
- buffer = string->ob_type->tp_as_buffer;
- if (!buffer || !buffer->bf_getreadbuffer || !buffer->bf_getsegcount ||
- buffer->bf_getsegcount(string, NULL) != 1) {
- PyErr_SetString(PyExc_TypeError, "expected string or buffer");
- return NULL;
- }
-
- /* determine buffer size */
- bytes = buffer->bf_getreadbuffer(string, 0, &ptr);
- if (bytes < 0) {
- PyErr_SetString(PyExc_TypeError, "buffer has negative size");
- return NULL;
- }
-
- /* determine character size */
-#if PY_VERSION_HEX >= 0x01060000
- size = PyObject_Size(string);
-#else
- size = PyObject_Length(string);
-#endif
-
- if (PyString_Check(string) || bytes == size)
- charsize = 1;
-#if defined(HAVE_UNICODE)
- else if (bytes == (Py_ssize_t) (size * sizeof(Py_UNICODE)))
- charsize = sizeof(Py_UNICODE);
-#endif
- else {
- PyErr_SetString(PyExc_TypeError, "buffer size mismatch");
- return NULL;
- }
-
-#if defined(HAVE_UNICODE)
- }
-#endif
-
- *p_length = size;
- *p_charsize = charsize;
-
- return ptr;
-}
-
-LOCAL(PyObject*)
-state_init(SRE_STATE* state, PatternObject* pattern, PyObject* string,
- Py_ssize_t start, Py_ssize_t end)
-{
- /* prepare state object */
-
- Py_ssize_t length;
- int charsize;
- void* ptr;
-
- memset(state, 0, sizeof(SRE_STATE));
-
- state->lastmark = -1;
- state->lastindex = -1;
-
- ptr = getstring(string, &length, &charsize);
- if (!ptr)
- return NULL;
-
- /* adjust boundaries */
- if (start < 0)
- start = 0;
- else if (start > length)
- start = length;
-
- if (end < 0)
- end = 0;
- else if (end > length)
- end = length;
-
- state->charsize = charsize;
-
- state->beginning = ptr;
-
- state->start = (void*) ((char*) ptr + start * state->charsize);
- state->end = (void*) ((char*) ptr + end * state->charsize);
-
- Py_INCREF(string);
- state->string = string;
- state->pos = start;
- state->endpos = end;
-
- if (pattern->flags & SRE_FLAG_LOCALE)
- state->lower = sre_lower_locale;
- else if (pattern->flags & SRE_FLAG_UNICODE)
-#if defined(HAVE_UNICODE)
- state->lower = sre_lower_unicode;
-#else
- state->lower = sre_lower_locale;
-#endif
- else
- state->lower = sre_lower;
-
- return string;
-}
-
-LOCAL(void)
-state_fini(SRE_STATE* state)
-{
- Py_XDECREF(state->string);
- data_stack_dealloc(state);
-}
-
-/* calculate offset from start of string */
-#define STATE_OFFSET(state, member)\
- (((char*)(member) - (char*)(state)->beginning) / (state)->charsize)
-
-LOCAL(PyObject*)
-state_getslice(SRE_STATE* state, Py_ssize_t index, PyObject* string, int empty)
-{
- Py_ssize_t i, j;
-
- index = (index - 1) * 2;
-
- if (string == Py_None || index >= state->lastmark || !state->mark[index] || !state->mark[index+1]) {
- if (empty)
- /* want empty string */
- i = j = 0;
- else {
- Py_INCREF(Py_None);
- return Py_None;
- }
- } else {
- i = STATE_OFFSET(state, state->mark[index]);
- j = STATE_OFFSET(state, state->mark[index+1]);
- }
-
- return PySequence_GetSlice(string, i, j);
-}
-
-static void
-pattern_error(int status)
-{
- switch (status) {
- case SRE_ERROR_RECURSION_LIMIT:
- PyErr_SetString(
- PyExc_RuntimeError,
- "maximum recursion limit exceeded"
- );
- break;
- case SRE_ERROR_MEMORY:
- PyErr_NoMemory();
- break;
- default:
- /* other error codes indicate compiler/engine bugs */
- PyErr_SetString(
- PyExc_RuntimeError,
- "internal error in regular expression engine"
- );
- }
-}
-
-static void
-pattern_dealloc(PatternObject* self)
-{
- if (self->weakreflist != NULL)
- PyObject_ClearWeakRefs((PyObject *) self);
- Py_XDECREF(self->pattern);
- Py_XDECREF(self->groupindex);
- Py_XDECREF(self->indexgroup);
- PyObject_DEL(self);
-}
-
-static PyObject*
-pattern_match(PatternObject* self, PyObject* args, PyObject* kw)
-{
- SRE_STATE state;
- int status;
-
- PyObject* string;
- Py_ssize_t start = 0;
- Py_ssize_t end = PY_SSIZE_T_MAX;
- static char* kwlist[] = { "pattern", "pos", "endpos", NULL };
- if (!PyArg_ParseTupleAndKeywords(args, kw, "O|nn:match", kwlist,
- &string, &start, &end))
- return NULL;
-
- string = state_init(&state, self, string, start, end);
- if (!string)
- return NULL;
-
- 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));
- } else {
-#if defined(HAVE_UNICODE)
- status = sre_umatch(&state, PatternObject_GetCode(self));
-#endif
- }
-
- TRACE(("|%p|%p|END\n", PatternObject_GetCode(self), state.ptr));
- if (PyErr_Occurred())
- return NULL;
-
- state_fini(&state);
-
- return pattern_new_match(self, &state, status);
-}
-
-static PyObject*
-pattern_search(PatternObject* self, PyObject* args, PyObject* kw)
-{
- SRE_STATE state;
- int status;
-
- PyObject* string;
- Py_ssize_t start = 0;
- Py_ssize_t end = PY_SSIZE_T_MAX;
- static char* kwlist[] = { "pattern", "pos", "endpos", NULL };
- if (!PyArg_ParseTupleAndKeywords(args, kw, "O|nn:search", kwlist,
- &string, &start, &end))
- return NULL;
-
- string = state_init(&state, self, string, start, end);
- 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 {
-#if defined(HAVE_UNICODE)
- status = sre_usearch(&state, PatternObject_GetCode(self));
-#endif
- }
-
- TRACE(("|%p|%p|END\n", PatternObject_GetCode(self), state.ptr));
-
- state_fini(&state);
-
- if (PyErr_Occurred())
- return NULL;
-
- return pattern_new_match(self, &state, status);
-}
-
-static PyObject*
-call(char* module, char* function, PyObject* args)
-{
- PyObject* name;
- PyObject* mod;
- PyObject* func;
- PyObject* result;
-
- if (!args)
- return NULL;
- name = PyString_FromString(module);
- if (!name)
- return NULL;
- mod = PyImport_Import(name);
- Py_DECREF(name);
- if (!mod)
- return NULL;
- func = PyObject_GetAttrString(mod, function);
- Py_DECREF(mod);
- if (!func)
- return NULL;
- result = PyObject_CallObject(func, args);
- Py_DECREF(func);
- Py_DECREF(args);
- return result;
-}
-
-#ifdef USE_BUILTIN_COPY
-static int
-deepcopy(PyObject** object, PyObject* memo)
-{
- PyObject* copy;
-
- copy = call(
- "copy", "deepcopy",
- PyTuple_Pack(2, *object, memo)
- );
- if (!copy)
- return 0;
-
- Py_DECREF(*object);
- *object = copy;
-
- return 1; /* success */
-}
-#endif
-
-static PyObject*
-join_list(PyObject* list, PyObject* pattern)
-{
- /* join list elements */
-
- PyObject* joiner;
-#if PY_VERSION_HEX >= 0x01060000
- PyObject* function;
- PyObject* args;
-#endif
- PyObject* result;
-
- switch (PyList_GET_SIZE(list)) {
- case 0:
- Py_DECREF(list);
- return PySequence_GetSlice(pattern, 0, 0);
- case 1:
- result = PyList_GET_ITEM(list, 0);
- Py_INCREF(result);
- Py_DECREF(list);
- return result;
- }
-
- /* two or more elements: slice out a suitable separator from the
- first member, and use that to join the entire list */
-
- joiner = PySequence_GetSlice(pattern, 0, 0);
- if (!joiner)
- return NULL;
-
-#if PY_VERSION_HEX >= 0x01060000
- function = PyObject_GetAttrString(joiner, "join");
- if (!function) {
- Py_DECREF(joiner);
- return NULL;
- }
- args = PyTuple_New(1);
- if (!args) {
- Py_DECREF(function);
- Py_DECREF(joiner);
- return NULL;
- }
- PyTuple_SET_ITEM(args, 0, list);
- result = PyObject_CallObject(function, args);
- Py_DECREF(args); /* also removes list */
- Py_DECREF(function);
-#else
- result = call(
- "string", "join",
- PyTuple_Pack(2, list, joiner)
- );
-#endif
- Py_DECREF(joiner);
-
- return result;
-}
-
-static PyObject*
-pattern_findall(PatternObject* self, PyObject* args, PyObject* kw)
-{
- SRE_STATE state;
- PyObject* list;
- int status;
- Py_ssize_t i, b, e;
-
- PyObject* string;
- Py_ssize_t start = 0;
- Py_ssize_t end = PY_SSIZE_T_MAX;
- static char* kwlist[] = { "source", "pos", "endpos", NULL };
- if (!PyArg_ParseTupleAndKeywords(args, kw, "O|nn:findall", kwlist,
- &string, &start, &end))
- return NULL;
-
- string = state_init(&state, self, string, start, end);
- if (!string)
- return NULL;
-
- list = PyList_New(0);
- if (!list) {
- state_fini(&state);
- return NULL;
- }
-
- while (state.start <= state.end) {
-
- PyObject* item;
-
- state_reset(&state);
-
- state.ptr = state.start;
-
- if (state.charsize == 1) {
- status = sre_search(&state, PatternObject_GetCode(self));
- } else {
-#if defined(HAVE_UNICODE)
- status = sre_usearch(&state, PatternObject_GetCode(self));
-#endif
- }
-
- if (PyErr_Occurred())
- goto error;
-
- if (status <= 0) {
- if (status == 0)
- break;
- pattern_error(status);
- goto error;
- }
-
- /* don't bother to build a match object */
- switch (self->groups) {
- case 0:
- b = STATE_OFFSET(&state, state.start);
- e = STATE_OFFSET(&state, state.ptr);
- item = PySequence_GetSlice(string, b, e);
- if (!item)
- goto error;
- break;
- case 1:
- item = state_getslice(&state, 1, string, 1);
- if (!item)
- goto error;
- break;
- default:
- item = PyTuple_New(self->groups);
- if (!item)
- goto error;
- for (i = 0; i < self->groups; i++) {
- PyObject* o = state_getslice(&state, i+1, string, 1);
- if (!o) {
- Py_DECREF(item);
- goto error;
- }
- PyTuple_SET_ITEM(item, i, o);
- }
- break;
- }
-
- status = PyList_Append(list, item);
- Py_DECREF(item);
- if (status < 0)
- goto error;
-
- if (state.ptr == state.start)
- state.start = (void*) ((char*) state.ptr + state.charsize);
- else
- state.start = state.ptr;
-
- }
-
- state_fini(&state);
- return list;
-
-error:
- Py_DECREF(list);
- state_fini(&state);
- return NULL;
-
-}
-
-#if PY_VERSION_HEX >= 0x02020000
-static PyObject*
-pattern_finditer(PatternObject* pattern, PyObject* args)
-{
- PyObject* scanner;
- PyObject* search;
- PyObject* iterator;
-
- scanner = pattern_scanner(pattern, args);
- if (!scanner)
- return NULL;
-
- search = PyObject_GetAttrString(scanner, "search");
- Py_DECREF(scanner);
- if (!search)
- return NULL;
-
- iterator = PyCallIter_New(search, Py_None);
- Py_DECREF(search);
-
- return iterator;
-}
-#endif
-
-static PyObject*
-pattern_split(PatternObject* self, PyObject* args, PyObject* kw)
-{
- SRE_STATE state;
- PyObject* list;
- PyObject* item;
- int status;
- Py_ssize_t n;
- Py_ssize_t i;
- void* last;
-
- PyObject* string;
- Py_ssize_t maxsplit = 0;
- static char* kwlist[] = { "source", "maxsplit", NULL };
- if (!PyArg_ParseTupleAndKeywords(args, kw, "O|n:split", kwlist,
- &string, &maxsplit))
- return NULL;
-
- string = state_init(&state, self, string, 0, PY_SSIZE_T_MAX);
- if (!string)
- return NULL;
-
- list = PyList_New(0);
- if (!list) {
- state_fini(&state);
- return NULL;
- }
-
- n = 0;
- last = state.start;
-
- while (!maxsplit || n < maxsplit) {
-
- state_reset(&state);
-
- state.ptr = state.start;
-
- if (state.charsize == 1) {
- status = sre_search(&state, PatternObject_GetCode(self));
- } else {
-#if defined(HAVE_UNICODE)
- status = sre_usearch(&state, PatternObject_GetCode(self));
-#endif
- }
-
- if (PyErr_Occurred())
- goto error;
-
- if (status <= 0) {
- if (status == 0)
- break;
- pattern_error(status);
- goto error;
- }
-
- if (state.start == state.ptr) {
- if (last == state.end)
- break;
- /* skip one character */
- state.start = (void*) ((char*) state.ptr + state.charsize);
- continue;
- }
-
- /* get segment before this match */
- item = PySequence_GetSlice(
- string, STATE_OFFSET(&state, last),
- STATE_OFFSET(&state, state.start)
- );
- if (!item)
- goto error;
- status = PyList_Append(list, item);
- Py_DECREF(item);
- if (status < 0)
- goto error;
-
- /* add groups (if any) */
- for (i = 0; i < self->groups; i++) {
- item = state_getslice(&state, i+1, string, 0);
- if (!item)
- goto error;
- status = PyList_Append(list, item);
- Py_DECREF(item);
- if (status < 0)
- goto error;
- }
-
- n = n + 1;
-
- last = state.start = state.ptr;
-
- }
-
- /* get segment following last match (even if empty) */
- item = PySequence_GetSlice(
- string, STATE_OFFSET(&state, last), state.endpos
- );
- if (!item)
- goto error;
- status = PyList_Append(list, item);
- Py_DECREF(item);
- if (status < 0)
- goto error;
-
- state_fini(&state);
- return list;
-
-error:
- Py_DECREF(list);
- state_fini(&state);
- return NULL;
-
-}
-
-static PyObject*
-pattern_subx(PatternObject* self, PyObject* ptemplate, PyObject* string,
- Py_ssize_t count, Py_ssize_t subn)
-{
- SRE_STATE state;
- PyObject* list;
- PyObject* item;
- PyObject* filter;
- PyObject* args;
- PyObject* match;
- void* ptr;
- int status;
- Py_ssize_t n;
- Py_ssize_t i, b, e;
- int bint;
- int filter_is_callable;
-
- if (PyCallable_Check(ptemplate)) {
- /* sub/subn takes either a function or a template */
- filter = ptemplate;
- Py_INCREF(filter);
- filter_is_callable = 1;
- } else {
- /* if not callable, check if it's a literal string */
- int literal;
- ptr = getstring(ptemplate, &n, &bint);
- b = bint;
- if (ptr) {
- if (b == 1) {
- literal = sre_literal_template((unsigned char *)ptr, n);
- } else {
-#if defined(HAVE_UNICODE)
- literal = sre_uliteral_template((Py_UNICODE *)ptr, n);
-#endif
- }
- } else {
- PyErr_Clear();
- literal = 0;
- }
- if (literal) {
- filter = ptemplate;
- Py_INCREF(filter);
- filter_is_callable = 0;
- } else {
- /* not a literal; hand it over to the template compiler */
- filter = call(
- SRE_PY_MODULE, "_subx",
- PyTuple_Pack(2, self, ptemplate)
- );
- if (!filter)
- return NULL;
- filter_is_callable = PyCallable_Check(filter);
- }
- }
-
- string = state_init(&state, self, string, 0, PY_SSIZE_T_MAX);
- if (!string) {
- Py_DECREF(filter);
- return NULL;
- }
-
- list = PyList_New(0);
- if (!list) {
- Py_DECREF(filter);
- state_fini(&state);
- return NULL;
- }
-
- n = i = 0;
-
- while (!count || n < count) {
-
- state_reset(&state);
-
- state.ptr = state.start;
-
- if (state.charsize == 1) {
- status = sre_search(&state, PatternObject_GetCode(self));
- } else {
-#if defined(HAVE_UNICODE)
- status = sre_usearch(&state, PatternObject_GetCode(self));
-#endif
- }
-
- if (PyErr_Occurred())
- goto error;
-
- if (status <= 0) {
- if (status == 0)
- break;
- pattern_error(status);
- goto error;
- }
-
- b = STATE_OFFSET(&state, state.start);
- e = STATE_OFFSET(&state, state.ptr);
-
- if (i < b) {
- /* get segment before this match */
- item = PySequence_GetSlice(string, i, b);
- if (!item)
- goto error;
- status = PyList_Append(list, item);
- Py_DECREF(item);
- if (status < 0)
- goto error;
-
- } else if (i == b && i == e && n > 0)
- /* ignore empty match on latest position */
- goto next;
-
- if (filter_is_callable) {
- /* pass match object through filter */
- match = pattern_new_match(self, &state, 1);
- if (!match)
- goto error;
- args = PyTuple_Pack(1, match);
- if (!args) {
- Py_DECREF(match);
- goto error;
- }
- item = PyObject_CallObject(filter, args);
- Py_DECREF(args);
- Py_DECREF(match);
- if (!item)
- goto error;
- } else {
- /* filter is literal string */
- item = filter;
- Py_INCREF(item);
- }
-
- /* add to list */
- if (item != Py_None) {
- status = PyList_Append(list, item);
- Py_DECREF(item);
- if (status < 0)
- goto error;
- }
-
- i = e;
- n = n + 1;
-
-next:
- /* move on */
- if (state.ptr == state.start)
- state.start = (void*) ((char*) state.ptr + state.charsize);
- else
- state.start = state.ptr;
-
- }
-
- /* get segment following last match */
- if (i < state.endpos) {
- item = PySequence_GetSlice(string, i, state.endpos);
- if (!item)
- goto error;
- status = PyList_Append(list, item);
- Py_DECREF(item);
- if (status < 0)
- goto error;
- }
-
- state_fini(&state);
-
- Py_DECREF(filter);
-
- /* convert list to single string (also removes list) */
- item = join_list(list, self->pattern);
-
- if (!item)
- return NULL;
-
- if (subn)
- return Py_BuildValue("Ni", item, n);
-
- return item;
-
-error:
- Py_DECREF(list);
- state_fini(&state);
- Py_DECREF(filter);
- return NULL;
-
-}
-
-static PyObject*
-pattern_sub(PatternObject* self, PyObject* args, PyObject* kw)
-{
- PyObject* ptemplate;
- PyObject* string;
- Py_ssize_t count = 0;
- static char* kwlist[] = { "repl", "string", "count", NULL };
- if (!PyArg_ParseTupleAndKeywords(args, kw, "OO|n:sub", kwlist,
- &ptemplate, &string, &count))
- return NULL;
-
- return pattern_subx(self, ptemplate, string, count, 0);
-}
-
-static PyObject*
-pattern_subn(PatternObject* self, PyObject* args, PyObject* kw)
-{
- PyObject* ptemplate;
- PyObject* string;
- Py_ssize_t count = 0;
- static char* kwlist[] = { "repl", "string", "count", NULL };
- if (!PyArg_ParseTupleAndKeywords(args, kw, "OO|n:subn", kwlist,
- &ptemplate, &string, &count))
- return NULL;
-
- return pattern_subx(self, ptemplate, string, count, 1);
-}
-
-static PyObject*
-pattern_copy(PatternObject* self, PyObject *unused)
-{
-#ifdef USE_BUILTIN_COPY
- PatternObject* copy;
- int offset;
-
- copy = PyObject_NEW_VAR(PatternObject, &Pattern_Type, self->codesize);
- if (!copy)
- return NULL;
-
- offset = offsetof(PatternObject, groups);
-
- Py_XINCREF(self->groupindex);
- Py_XINCREF(self->indexgroup);
- Py_XINCREF(self->pattern);
-
- memcpy((char*) copy + offset, (char*) self + offset,
- sizeof(PatternObject) + self->codesize * sizeof(SRE_CODE) - offset);
- copy->weakreflist = NULL;
-
- return (PyObject*) copy;
-#else
- PyErr_SetString(PyExc_TypeError, "cannot copy this pattern object");
- return NULL;
-#endif
-}
-
-static PyObject*
-pattern_deepcopy(PatternObject* self, PyObject* memo)
-{
-#ifdef USE_BUILTIN_COPY
- PatternObject* copy;
-
- copy = (PatternObject*) pattern_copy(self);
- if (!copy)
- return NULL;
-
- if (!deepcopy(&copy->groupindex, memo) ||
- !deepcopy(&copy->indexgroup, memo) ||
- !deepcopy(&copy->pattern, memo)) {
- Py_DECREF(copy);
- return NULL;
- }
-
-#else
- PyErr_SetString(PyExc_TypeError, "cannot deepcopy this pattern object");
- return NULL;
-#endif
-}
-
-PyDoc_STRVAR(pattern_match_doc,
-"match(string[, pos[, endpos]]) --> match object or None.\n\
- Matches zero or more characters at the beginning of the string");
-
-PyDoc_STRVAR(pattern_search_doc,
-"search(string[, pos[, endpos]]) --> match object or None.\n\
- Scan through string looking for a match, and return a corresponding\n\
- MatchObject instance. Return None if no position in the string matches.");
-
-PyDoc_STRVAR(pattern_split_doc,
-"split(string[, maxsplit = 0]) --> list.\n\
- Split string by the occurrences of pattern.");
-
-PyDoc_STRVAR(pattern_findall_doc,
-"findall(string[, pos[, endpos]]) --> list.\n\
- Return a list of all non-overlapping matches of pattern in string.");
-
-PyDoc_STRVAR(pattern_finditer_doc,
-"finditer(string[, pos[, endpos]]) --> iterator.\n\
- Return an iterator over all non-overlapping matches for the \n\
- RE pattern in string. For each match, the iterator returns a\n\
- match object.");
-
-PyDoc_STRVAR(pattern_sub_doc,
-"sub(repl, string[, count = 0]) --> newstring\n\
- Return the string obtained by replacing the leftmost non-overlapping\n\
- occurrences of pattern in string by the replacement repl.");
-
-PyDoc_STRVAR(pattern_subn_doc,
-"subn(repl, string[, count = 0]) --> (newstring, number of subs)\n\
- Return the tuple (new_string, number_of_subs_made) found by replacing\n\
- the leftmost non-overlapping occurrences of pattern with the\n\
- replacement repl.");
-
-PyDoc_STRVAR(pattern_doc, "Compiled regular expression objects");
-
-static PyMethodDef pattern_methods[] = {
- {"match", (PyCFunction) pattern_match, METH_VARARGS|METH_KEYWORDS,
- pattern_match_doc},
- {"search", (PyCFunction) pattern_search, METH_VARARGS|METH_KEYWORDS,
- pattern_search_doc},
- {"sub", (PyCFunction) pattern_sub, METH_VARARGS|METH_KEYWORDS,
- pattern_sub_doc},
- {"subn", (PyCFunction) pattern_subn, METH_VARARGS|METH_KEYWORDS,
- pattern_subn_doc},
- {"split", (PyCFunction) pattern_split, METH_VARARGS|METH_KEYWORDS,
- pattern_split_doc},
- {"findall", (PyCFunction) pattern_findall, METH_VARARGS|METH_KEYWORDS,
- pattern_findall_doc},
-#if PY_VERSION_HEX >= 0x02020000
- {"finditer", (PyCFunction) pattern_finditer, METH_VARARGS,
- pattern_finditer_doc},
-#endif
- {"scanner", (PyCFunction) pattern_scanner, METH_VARARGS},
- {"__copy__", (PyCFunction) pattern_copy, METH_NOARGS},
- {"__deepcopy__", (PyCFunction) pattern_deepcopy, METH_O},
- {NULL, NULL}
-};
-
-static PyObject*
-pattern_getattr(PatternObject* self, char* name)
-{
- PyObject* res;
-
- res = Py_FindMethod(pattern_methods, (PyObject*) self, name);
-
- if (res)
- return res;
-
- PyErr_Clear();
-
- /* attributes */
- if (!strcmp(name, "pattern")) {
- Py_INCREF(self->pattern);
- return self->pattern;
- }
-
- if (!strcmp(name, "flags"))
- return Py_BuildValue("i", self->flags);
-
- if (!strcmp(name, "groups"))
- return Py_BuildValue("i", self->groups);
-
- if (!strcmp(name, "groupindex") && self->groupindex) {
- Py_INCREF(self->groupindex);
- return self->groupindex;
- }
-
- PyErr_SetString(PyExc_AttributeError, name);
- return NULL;
-}
-
-statichere PyTypeObject Pattern_Type = {
- PyObject_HEAD_INIT(NULL)
- 0, "_" SRE_MODULE ".SRE_Pattern",
- sizeof(PatternObject), sizeof(SRE_CODE),
- (destructor)pattern_dealloc, /*tp_dealloc*/
- 0, /*tp_print*/
- (getattrfunc)pattern_getattr, /*tp_getattr*/
- 0, /* tp_setattr */
- 0, /* tp_compare */
- 0, /* tp_repr */
- 0, /* tp_as_number */
- 0, /* tp_as_sequence */
- 0, /* tp_as_mapping */
- 0, /* tp_hash */
- 0, /* tp_call */
- 0, /* tp_str */
- 0, /* tp_getattro */
- 0, /* tp_setattro */
- 0, /* tp_as_buffer */
- Py_TPFLAGS_HAVE_WEAKREFS, /* tp_flags */
- pattern_doc, /* tp_doc */
- 0, /* tp_traverse */
- 0, /* tp_clear */
- 0, /* tp_richcompare */
- offsetof(PatternObject, weakreflist), /* tp_weaklistoffset */
-};
-
-static PyObject *
-_compile(PyObject* self_, PyObject* args)
-{
- /* "compile" pattern descriptor to pattern object */
-
- PatternObject* self;
- Py_ssize_t i, n;
-
- PyObject* pattern;
- int flags = 0;
- PyObject* code;
- Py_ssize_t groups = 0;
- PyObject* groupindex = NULL;
- PyObject* indexgroup = NULL;
- if (!PyArg_ParseTuple(args, "OiO!|nOO", &pattern, &flags,
- &PyList_Type, &code, &groups,
- &groupindex, &indexgroup))
- return NULL;
-
- n = PyList_GET_SIZE(code);
-
- self = PyObject_NEW_VAR(PatternObject, &Pattern_Type, n);
- if (!self)
- return NULL;
-
- self->codesize = n;
-
- for (i = 0; i < n; i++) {
- PyObject *o = PyList_GET_ITEM(code, i);
- unsigned long value = PyInt_Check(o) ? (unsigned long)PyInt_AsLong(o)
- : PyLong_AsUnsignedLong(o);
- self->code[i] = (SRE_CODE) value;
- if ((unsigned long) self->code[i] != value) {
- PyErr_SetString(PyExc_OverflowError,
- "regular expression code size limit exceeded");
- break;
- }
- }
-
- if (PyErr_Occurred()) {
- PyObject_DEL(self);
- return NULL;
- }
-
- Py_INCREF(pattern);
- self->pattern = pattern;
-
- self->flags = flags;
-
- self->groups = groups;
-
- Py_XINCREF(groupindex);
- self->groupindex = groupindex;
-
- Py_XINCREF(indexgroup);
- self->indexgroup = indexgroup;
-
- self->weakreflist = NULL;
-
- return (PyObject*) self;
-}
-
-/* -------------------------------------------------------------------- */
-/* match methods */
-
-static void
-match_dealloc(MatchObject* self)
-{
- Py_XDECREF(self->regs);
- Py_XDECREF(self->string);
- Py_DECREF(self->pattern);
- PyObject_DEL(self);
-}
-
-static PyObject*
-match_getslice_by_index(MatchObject* self, Py_ssize_t index, PyObject* def)
-{
- if (index < 0 || index >= self->groups) {
- /* raise IndexError if we were given a bad group number */
- PyErr_SetString(
- PyExc_IndexError,
- "no such group"
- );
- return NULL;
- }
-
- index *= 2;
-
- if (self->string == Py_None || self->mark[index] < 0) {
- /* return default value if the string or group is undefined */
- Py_INCREF(def);
- return def;
- }
-
- return PySequence_GetSlice(
- self->string, self->mark[index], self->mark[index+1]
- );
-}
-
-static Py_ssize_t
-match_getindex(MatchObject* self, PyObject* index)
-{
- Py_ssize_t i;
-
- if (PyInt_Check(index))
- return PyInt_AsSsize_t(index);
-
- i = -1;
-
- if (self->pattern->groupindex) {
- index = PyObject_GetItem(self->pattern->groupindex, index);
- if (index) {
- if (PyInt_Check(index) || PyLong_Check(index))
- i = PyInt_AsSsize_t(index);
- Py_DECREF(index);
- } else
- PyErr_Clear();
- }
-
- return i;
-}
-
-static PyObject*
-match_getslice(MatchObject* self, PyObject* index, PyObject* def)
-{
- return match_getslice_by_index(self, match_getindex(self, index), def);
-}
-
-static PyObject*
-match_expand(MatchObject* self, PyObject* ptemplate)
-{
- /* delegate to Python code */
- return call(
- SRE_PY_MODULE, "_expand",
- PyTuple_Pack(3, self->pattern, self, ptemplate)
- );
-}
-
-static PyObject*
-match_group(MatchObject* self, PyObject* args)
-{
- PyObject* result;
- Py_ssize_t i, size;
-
- size = PyTuple_GET_SIZE(args);
-
- switch (size) {
- case 0:
- result = match_getslice(self, Py_False, Py_None);
- break;
- case 1:
- result = match_getslice(self, PyTuple_GET_ITEM(args, 0), Py_None);
- break;
- default:
- /* fetch multiple items */
- result = PyTuple_New(size);
- if (!result)
- return NULL;
- for (i = 0; i < size; i++) {
- PyObject* item = match_getslice(
- self, PyTuple_GET_ITEM(args, i), Py_None
- );
- if (!item) {
- Py_DECREF(result);
- return NULL;
- }
- PyTuple_SET_ITEM(result, i, item);
- }
- break;
- }
- return result;
-}
-
-static PyObject*
-match_groups(MatchObject* self, PyObject* args, PyObject* kw)
-{
- PyObject* result;
- Py_ssize_t index;
-
- PyObject* def = Py_None;
- static char* kwlist[] = { "default", NULL };
- if (!PyArg_ParseTupleAndKeywords(args, kw, "|O:groups", kwlist, &def))
- return NULL;
-
- result = PyTuple_New(self->groups-1);
- if (!result)
- return NULL;
-
- for (index = 1; index < self->groups; index++) {
- PyObject* item;
- item = match_getslice_by_index(self, index, def);
- if (!item) {
- Py_DECREF(result);
- return NULL;
- }
- PyTuple_SET_ITEM(result, index-1, item);
- }
-
- return result;
-}
-
-static PyObject*
-match_groupdict(MatchObject* self, PyObject* args, PyObject* kw)
-{
- PyObject* result;
- PyObject* keys;
- Py_ssize_t index;
-
- PyObject* def = Py_None;
- static char* kwlist[] = { "default", NULL };
- if (!PyArg_ParseTupleAndKeywords(args, kw, "|O:groupdict", kwlist, &def))
- return NULL;
-
- result = PyDict_New();
- if (!result || !self->pattern->groupindex)
- return result;
-
- keys = PyMapping_Keys(self->pattern->groupindex);
- if (!keys)
- goto failed;
-
- for (index = 0; index < PyList_GET_SIZE(keys); index++) {
- int status;
- PyObject* key;
- PyObject* value;
- key = PyList_GET_ITEM(keys, index);
- if (!key)
- goto failed;
- value = match_getslice(self, key, def);
- if (!value) {
- Py_DECREF(key);
- goto failed;
- }
- status = PyDict_SetItem(result, key, value);
- Py_DECREF(value);
- if (status < 0)
- goto failed;
- }
-
- Py_DECREF(keys);
-
- return result;
-
-failed:
- Py_XDECREF(keys);
- Py_DECREF(result);
- return NULL;
-}
-
-static PyObject*
-match_start(MatchObject* self, PyObject* args)
-{
- Py_ssize_t index;
-
- PyObject* index_ = Py_False; /* zero */
- if (!PyArg_UnpackTuple(args, "start", 0, 1, &index_))
- return NULL;
-
- index = match_getindex(self, index_);
-
- if (index < 0 || index >= self->groups) {
- PyErr_SetString(
- PyExc_IndexError,
- "no such group"
- );
- return NULL;
- }
-
- /* mark is -1 if group is undefined */
- return Py_BuildValue("i", self->mark[index*2]);
-}
-
-static PyObject*
-match_end(MatchObject* self, PyObject* args)
-{
- Py_ssize_t index;
-
- PyObject* index_ = Py_False; /* zero */
- if (!PyArg_UnpackTuple(args, "end", 0, 1, &index_))
- return NULL;
-
- index = match_getindex(self, index_);
-
- if (index < 0 || index >= self->groups) {
- PyErr_SetString(
- PyExc_IndexError,
- "no such group"
- );
- return NULL;
- }
-
- /* mark is -1 if group is undefined */
- return Py_BuildValue("i", self->mark[index*2+1]);
-}
-
-LOCAL(PyObject*)
-_pair(Py_ssize_t i1, Py_ssize_t i2)
-{
- PyObject* pair;
- PyObject* item;
-
- pair = PyTuple_New(2);
- if (!pair)
- return NULL;
-
- item = PyInt_FromSsize_t(i1);
- if (!item)
- goto error;
- PyTuple_SET_ITEM(pair, 0, item);
-
- item = PyInt_FromSsize_t(i2);
- if (!item)
- goto error;
- PyTuple_SET_ITEM(pair, 1, item);
-
- return pair;
-
- error:
- Py_DECREF(pair);
- return NULL;
-}
-
-static PyObject*
-match_span(MatchObject* self, PyObject* args)
-{
- Py_ssize_t index;
-
- PyObject* index_ = Py_False; /* zero */
- if (!PyArg_UnpackTuple(args, "span", 0, 1, &index_))
- return NULL;
-
- index = match_getindex(self, index_);
-
- if (index < 0 || index >= self->groups) {
- PyErr_SetString(
- PyExc_IndexError,
- "no such group"
- );
- return NULL;
- }
-
- /* marks are -1 if group is undefined */
- return _pair(self->mark[index*2], self->mark[index*2+1]);
-}
-
-static PyObject*
-match_regs(MatchObject* self)
-{
- PyObject* regs;
- PyObject* item;
- Py_ssize_t index;
-
- regs = PyTuple_New(self->groups);
- if (!regs)
- return NULL;
-
- for (index = 0; index < self->groups; index++) {
- item = _pair(self->mark[index*2], self->mark[index*2+1]);
- if (!item) {
- Py_DECREF(regs);
- return NULL;
- }
- PyTuple_SET_ITEM(regs, index, item);
- }
-
- Py_INCREF(regs);
- self->regs = regs;
-
- return regs;
-}
-
-static PyObject*
-match_copy(MatchObject* self, PyObject *unused)
-{
-#ifdef USE_BUILTIN_COPY
- MatchObject* copy;
- Py_ssize_t slots, offset;
-
- slots = 2 * (self->pattern->groups+1);
-
- copy = PyObject_NEW_VAR(MatchObject, &Match_Type, slots);
- if (!copy)
- return NULL;
-
- /* this value a constant, but any compiler should be able to
- figure that out all by itself */
- offset = offsetof(MatchObject, string);
-
- Py_XINCREF(self->pattern);
- Py_XINCREF(self->string);
- Py_XINCREF(self->regs);
-
- memcpy((char*) copy + offset, (char*) self + offset,
- sizeof(MatchObject) + slots * sizeof(Py_ssize_t) - offset);
-
- return (PyObject*) copy;
-#else
- PyErr_SetString(PyExc_TypeError, "cannot copy this match object");
- return NULL;
-#endif
-}
-
-static PyObject*
-match_deepcopy(MatchObject* self, PyObject* memo)
-{
-#ifdef USE_BUILTIN_COPY
- MatchObject* copy;
-
- copy = (MatchObject*) match_copy(self);
- if (!copy)
- return NULL;
-
- if (!deepcopy((PyObject**) &copy->pattern, memo) ||
- !deepcopy(&copy->string, memo) ||
- !deepcopy(&copy->regs, memo)) {
- Py_DECREF(copy);
- return NULL;
- }
-
-#else
- PyErr_SetString(PyExc_TypeError, "cannot deepcopy this match object");
- return NULL;
-#endif
-}
-
-static PyMethodDef match_methods[] = {
- {"group", (PyCFunction) match_group, METH_VARARGS},
- {"start", (PyCFunction) match_start, METH_VARARGS},
- {"end", (PyCFunction) match_end, METH_VARARGS},
- {"span", (PyCFunction) match_span, METH_VARARGS},
- {"groups", (PyCFunction) match_groups, METH_VARARGS|METH_KEYWORDS},
- {"groupdict", (PyCFunction) match_groupdict, METH_VARARGS|METH_KEYWORDS},
- {"expand", (PyCFunction) match_expand, METH_O},
- {"__copy__", (PyCFunction) match_copy, METH_NOARGS},
- {"__deepcopy__", (PyCFunction) match_deepcopy, METH_O},
- {NULL, NULL}
-};
-
-static PyObject*
-match_getattr(MatchObject* self, char* name)
-{
- PyObject* res;
-
- res = Py_FindMethod(match_methods, (PyObject*) self, name);
- if (res)
- return res;
-
- PyErr_Clear();
-
- if (!strcmp(name, "lastindex")) {
- if (self->lastindex >= 0)
- return Py_BuildValue("i", self->lastindex);
- Py_INCREF(Py_None);
- return Py_None;
- }
-
- if (!strcmp(name, "lastgroup")) {
- if (self->pattern->indexgroup && self->lastindex >= 0) {
- PyObject* result = PySequence_GetItem(
- self->pattern->indexgroup, self->lastindex
- );
- if (result)
- return result;
- PyErr_Clear();
- }
- Py_INCREF(Py_None);
- return Py_None;
- }
-
- if (!strcmp(name, "string")) {
- if (self->string) {
- Py_INCREF(self->string);
- return self->string;
- } else {
- Py_INCREF(Py_None);
- return Py_None;
- }
- }
-
- if (!strcmp(name, "regs")) {
- if (self->regs) {
- Py_INCREF(self->regs);
- return self->regs;
- } else
- return match_regs(self);
- }
-
- if (!strcmp(name, "re")) {
- Py_INCREF(self->pattern);
- return (PyObject*) self->pattern;
- }
-
- if (!strcmp(name, "pos"))
- return Py_BuildValue("i", self->pos);
-
- if (!strcmp(name, "endpos"))
- return Py_BuildValue("i", self->endpos);
-
- PyErr_SetString(PyExc_AttributeError, name);
- return NULL;
-}
-
-/* FIXME: implement setattr("string", None) as a special case (to
- detach the associated string, if any */
-
-statichere PyTypeObject Match_Type = {
- PyObject_HEAD_INIT(NULL)
- 0, "_" SRE_MODULE ".SRE_Match",
- sizeof(MatchObject), sizeof(Py_ssize_t),
- (destructor)match_dealloc, /*tp_dealloc*/
- 0, /*tp_print*/
- (getattrfunc)match_getattr /*tp_getattr*/
-};
-
-static PyObject*
-pattern_new_match(PatternObject* pattern, SRE_STATE* state, int status)
-{
- /* create match object (from state object) */
-
- MatchObject* match;
- Py_ssize_t i, j;
- char* base;
- int n;
-
- if (status > 0) {
-
- /* create match object (with room for extra group marks) */
- match = PyObject_NEW_VAR(MatchObject, &Match_Type,
- 2*(pattern->groups+1));
- if (!match)
- return NULL;
-
- Py_INCREF(pattern);
- match->pattern = pattern;
-
- Py_INCREF(state->string);
- match->string = state->string;
-
- match->regs = NULL;
- match->groups = pattern->groups+1;
-
- /* fill in group slices */
-
- base = (char*) state->beginning;
- n = state->charsize;
-
- match->mark[0] = ((char*) state->start - base) / n;
- match->mark[1] = ((char*) state->ptr - base) / n;
-
- for (i = j = 0; i < pattern->groups; i++, j+=2)
- if (j+1 <= state->lastmark && state->mark[j] && state->mark[j+1]) {
- match->mark[j+2] = ((char*) state->mark[j] - base) / n;
- match->mark[j+3] = ((char*) state->mark[j+1] - base) / n;
- } else
- match->mark[j+2] = match->mark[j+3] = -1; /* undefined */
-
- match->pos = state->pos;
- match->endpos = state->endpos;
-
- match->lastindex = state->lastindex;
-
- return (PyObject*) match;
-
- } else if (status == 0) {
-
- /* no match */
- Py_INCREF(Py_None);
- return Py_None;
-
- }
-
- /* internal error */
- pattern_error(status);
- return NULL;
-}
-
-
-/* -------------------------------------------------------------------- */
-/* scanner methods (experimental) */
-
-static void
-scanner_dealloc(ScannerObject* self)
-{
- state_fini(&self->state);
- Py_DECREF(self->pattern);
- PyObject_DEL(self);
-}
-
-static PyObject*
-scanner_match(ScannerObject* self, PyObject *unused)
-{
- SRE_STATE* state = &self->state;
- PyObject* match;
- int status;
-
- state_reset(state);
-
- state->ptr = state->start;
-
- if (state->charsize == 1) {
- status = sre_match(state, PatternObject_GetCode(self->pattern));
- } else {
-#if defined(HAVE_UNICODE)
- status = sre_umatch(state, PatternObject_GetCode(self->pattern));
-#endif
- }
- if (PyErr_Occurred())
- return NULL;
-
- match = pattern_new_match((PatternObject*) self->pattern,
- state, status);
-
- if (status == 0 || state->ptr == state->start)
- state->start = (void*) ((char*) state->ptr + state->charsize);
- else
- state->start = state->ptr;
-
- return match;
-}
-
-
-static PyObject*
-scanner_search(ScannerObject* self, PyObject *unused)
-{
- SRE_STATE* state = &self->state;
- PyObject* match;
- int status;
-
- state_reset(state);
-
- state->ptr = state->start;
-
- if (state->charsize == 1) {
- status = sre_search(state, PatternObject_GetCode(self->pattern));
- } else {
-#if defined(HAVE_UNICODE)
- status = sre_usearch(state, PatternObject_GetCode(self->pattern));
-#endif
- }
- if (PyErr_Occurred())
- return NULL;
-
- match = pattern_new_match((PatternObject*) self->pattern,
- state, status);
-
- if (status == 0 || state->ptr == state->start)
- state->start = (void*) ((char*) state->ptr + state->charsize);
- else
- state->start = state->ptr;
-
- return match;
-}
-
-static PyMethodDef scanner_methods[] = {
- {"match", (PyCFunction) scanner_match, METH_NOARGS},
- {"search", (PyCFunction) scanner_search, METH_NOARGS},
- {NULL, NULL}
-};
-
-static PyObject*
-scanner_getattr(ScannerObject* self, char* name)
-{
- PyObject* res;
-
- res = Py_FindMethod(scanner_methods, (PyObject*) self, name);
- if (res)
- return res;
-
- PyErr_Clear();
-
- /* attributes */
- if (!strcmp(name, "pattern")) {
- Py_INCREF(self->pattern);
- return self->pattern;
- }
-
- PyErr_SetString(PyExc_AttributeError, name);
- return NULL;
-}
-
-statichere PyTypeObject Scanner_Type = {
- PyObject_HEAD_INIT(NULL)
- 0, "_" SRE_MODULE ".SRE_Scanner",
- sizeof(ScannerObject), 0,
- (destructor)scanner_dealloc, /*tp_dealloc*/
- 0, /*tp_print*/
- (getattrfunc)scanner_getattr, /*tp_getattr*/
-};
-
-static PyObject*
-pattern_scanner(PatternObject* pattern, PyObject* args)
-{
- /* create search state object */
-
- ScannerObject* self;
-
- PyObject* string;
- Py_ssize_t start = 0;
- Py_ssize_t end = PY_SSIZE_T_MAX;
- if (!PyArg_ParseTuple(args, "O|nn:scanner", &string, &start, &end))
- return NULL;
-
- /* create scanner object */
- self = PyObject_NEW(ScannerObject, &Scanner_Type);
- if (!self)
- return NULL;
-
- string = state_init(&self->state, pattern, string, start, end);
- if (!string) {
- PyObject_DEL(self);
- return NULL;
- }
-
- Py_INCREF(pattern);
- self->pattern = (PyObject*) pattern;
-
- return (PyObject*) self;
-}
-
-static PyMethodDef _functions[] = {
- {"compile", _compile, METH_VARARGS},
- {"getcodesize", sre_codesize, METH_NOARGS},
- {"getlower", sre_getlower, METH_VARARGS},
- {NULL, NULL}
-};
-
-#if PY_VERSION_HEX < 0x02030000
-DL_EXPORT(void) init_sre(void)
-#else
-PyMODINIT_FUNC init_sre(void)
-#endif
-{
- PyObject* m;
- PyObject* d;
- PyObject* x;
-
- /* Patch object types */
- Pattern_Type.ob_type = Match_Type.ob_type =
- Scanner_Type.ob_type = &PyType_Type;
-
- m = Py_InitModule("_" SRE_MODULE, _functions);
- if (m == NULL)
- return;
- d = PyModule_GetDict(m);
-
- x = PyInt_FromLong(SRE_MAGIC);
- if (x) {
- PyDict_SetItemString(d, "MAGIC", x);
- Py_DECREF(x);
- }
-
- x = PyInt_FromLong(sizeof(SRE_CODE));
- if (x) {
- PyDict_SetItemString(d, "CODESIZE", x);
- Py_DECREF(x);
- }
-
- x = PyString_FromString(copyright);
- if (x) {
- PyDict_SetItemString(d, "copyright", x);
- Py_DECREF(x);
- }
-}
-
-#endif /* !defined(SRE_RECURSIVE) */
-
-/* vim:ts=4:sw=4:et
-*/
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-07 23:10:52 +0000