diff options
Diffstat (limited to 'AppPkg/Applications/Python/PyMod-2.7.1/Modules/_sre.c')
| -rw-r--r-- | AppPkg/Applications/Python/PyMod-2.7.1/Modules/_sre.c | 3914 |
1 files changed, 3914 insertions, 0 deletions
diff --git a/AppPkg/Applications/Python/PyMod-2.7.1/Modules/_sre.c b/AppPkg/Applications/Python/PyMod-2.7.1/Modules/_sre.c new file mode 100644 index 0000000000..017d7ed600 --- /dev/null +++ b/AppPkg/Applications/Python/PyMod-2.7.1/Modules/_sre.c @@ -0,0 +1,3914 @@ +/*
+ * 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.
+ */
+
+/* Get rid of these macros to prevent collisions between EFI and Python in this file. */
+#undef RETURN_ERROR
+#undef RETURN_SUCCESS
+
+#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("gt", 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 */
+#define SRE_ERROR_INTERRUPTED -10 /* signal handler raised exception */
+
+#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_ISDECIMAL((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;
+ 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] && (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 (;;) {
+ ++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 (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 = Py_TYPE(string)->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;
+ case SRE_ERROR_INTERRUPTED:
+ /* An exception has already been raised, so let it fly */
+ 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* string)
+{
+ /* join list elements */
+
+ PyObject* joiner;
+#if PY_VERSION_HEX >= 0x01060000
+ PyObject* function;
+ PyObject* args;
+#endif
+ PyObject* result;
+
+ joiner = PySequence_GetSlice(string, 0, 0);
+ if (!joiner)
+ return NULL;
+
+ if (PyList_GET_SIZE(list) == 0) {
+ Py_DECREF(list);
+ return joiner;
+ }
+
+#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, string);
+
+ 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(©->groupindex, memo) ||
+ !deepcopy(©->indexgroup, memo) ||
+ !deepcopy(©->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 int _validate(PatternObject *self); /* Forward */
+
+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);
+ /* coverity[ampersand_in_size] */
+ self = PyObject_NEW_VAR(PatternObject, &Pattern_Type, n);
+ if (!self)
+ return NULL;
+ self->weakreflist = NULL;
+ self->pattern = NULL;
+ self->groupindex = NULL;
+ self->indexgroup = 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()) {
+ Py_DECREF(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;
+
+ if (!_validate(self)) {
+ Py_DECREF(self);
+ return NULL;
+ }
+
+ return (PyObject*) self;
+}
+
+/* -------------------------------------------------------------------- */
+/* Code validation */
+
+/* To learn more about this code, have a look at the _compile() function in
+ Lib/sre_compile.py. The validation functions below checks the code array
+ for conformance with the code patterns generated there.
+
+ The nice thing about the generated code is that it is position-independent:
+ all jumps are relative jumps forward. Also, jumps don't cross each other:
+ the target of a later jump is always earlier than the target of an earlier
+ jump. IOW, this is okay:
+
+ J---------J-------T--------T
+ \ \_____/ /
+ \______________________/
+
+ but this is not:
+
+ J---------J-------T--------T
+ \_________\_____/ /
+ \____________/
+
+ It also helps that SRE_CODE is always an unsigned type, either 2 bytes or 4
+ bytes wide (the latter if Python is compiled for "wide" unicode support).
+*/
+
+/* Defining this one enables tracing of the validator */
+#undef VVERBOSE
+
+/* Trace macro for the validator */
+#if defined(VVERBOSE)
+#define VTRACE(v) printf v
+#else
+#define VTRACE(v)
+#endif
+
+/* Report failure */
+#define FAIL do { VTRACE(("FAIL: %d\n", __LINE__)); return 0; } while (0)
+
+/* Extract opcode, argument, or skip count from code array */
+#define GET_OP \
+ do { \
+ VTRACE(("%p: ", code)); \
+ if (code >= end) FAIL; \
+ op = *code++; \
+ VTRACE(("%lu (op)\n", (unsigned long)op)); \
+ } while (0)
+#define GET_ARG \
+ do { \
+ VTRACE(("%p= ", code)); \
+ if (code >= end) FAIL; \
+ arg = *code++; \
+ VTRACE(("%lu (arg)\n", (unsigned long)arg)); \
+ } while (0)
+#define GET_SKIP_ADJ(adj) \
+ do { \
+ VTRACE(("%p= ", code)); \
+ if (code >= end) FAIL; \
+ skip = *code; \
+ VTRACE(("%lu (skip to %p)\n", \
+ (unsigned long)skip, code+skip)); \
+ if (code+skip-adj < code || code+skip-adj > end)\
+ FAIL; \
+ code++; \
+ } while (0)
+#define GET_SKIP GET_SKIP_ADJ(0)
+
+static int
+_validate_charset(SRE_CODE *code, SRE_CODE *end)
+{
+ /* Some variables are manipulated by the macros above */
+ SRE_CODE op;
+ SRE_CODE arg;
+ SRE_CODE offset;
+ int i;
+
+ while (code < end) {
+ GET_OP;
+ switch (op) {
+
+ case SRE_OP_NEGATE:
+ break;
+
+ case SRE_OP_LITERAL:
+ GET_ARG;
+ break;
+
+ case SRE_OP_RANGE:
+ GET_ARG;
+ GET_ARG;
+ break;
+
+ case SRE_OP_CHARSET:
+ offset = 32/sizeof(SRE_CODE); /* 32-byte bitmap */
+ if (code+offset < code || code+offset > end)
+ FAIL;
+ code += offset;
+ break;
+
+ case SRE_OP_BIGCHARSET:
+ GET_ARG; /* Number of blocks */
+ offset = 256/sizeof(SRE_CODE); /* 256-byte table */
+ if (code+offset < code || code+offset > end)
+ FAIL;
+ /* Make sure that each byte points to a valid block */
+ for (i = 0; i < 256; i++) {
+ if (((unsigned char *)code)[i] >= arg)
+ FAIL;
+ }
+ code += offset;
+ offset = arg * 32/sizeof(SRE_CODE); /* 32-byte bitmap times arg */
+ if (code+offset < code || code+offset > end)
+ FAIL;
+ code += offset;
+ break;
+
+ case SRE_OP_CATEGORY:
+ GET_ARG;
+ switch (arg) {
+ case SRE_CATEGORY_DIGIT:
+ case SRE_CATEGORY_NOT_DIGIT:
+ case SRE_CATEGORY_SPACE:
+ case SRE_CATEGORY_NOT_SPACE:
+ case SRE_CATEGORY_WORD:
+ case SRE_CATEGORY_NOT_WORD:
+ case SRE_CATEGORY_LINEBREAK:
+ case SRE_CATEGORY_NOT_LINEBREAK:
+ case SRE_CATEGORY_LOC_WORD:
+ case SRE_CATEGORY_LOC_NOT_WORD:
+ case SRE_CATEGORY_UNI_DIGIT:
+ case SRE_CATEGORY_UNI_NOT_DIGIT:
+ case SRE_CATEGORY_UNI_SPACE:
+ case SRE_CATEGORY_UNI_NOT_SPACE:
+ case SRE_CATEGORY_UNI_WORD:
+ case SRE_CATEGORY_UNI_NOT_WORD:
+ case SRE_CATEGORY_UNI_LINEBREAK:
+ case SRE_CATEGORY_UNI_NOT_LINEBREAK:
+ break;
+ default:
+ FAIL;
+ }
+ break;
+
+ default:
+ FAIL;
+
+ }
+ }
+
+ return 1;
+}
+
+static int
+_validate_inner(SRE_CODE *code, SRE_CODE *end, Py_ssize_t groups)
+{
+ /* Some variables are manipulated by the macros above */
+ SRE_CODE op;
+ SRE_CODE arg;
+ SRE_CODE skip;
+
+ VTRACE(("code=%p, end=%p\n", code, end));
+
+ if (code > end)
+ FAIL;
+
+ while (code < end) {
+ GET_OP;
+ switch (op) {
+
+ case SRE_OP_MARK:
+ /* We don't check whether marks are properly nested; the
+ sre_match() code is robust even if they don't, and the worst
+ you can get is nonsensical match results. */
+ GET_ARG;
+ if (arg > 2*groups+1) {
+ VTRACE(("arg=%d, groups=%d\n", (int)arg, (int)groups));
+ FAIL;
+ }
+ break;
+
+ case SRE_OP_LITERAL:
+ case SRE_OP_NOT_LITERAL:
+ case SRE_OP_LITERAL_IGNORE:
+ case SRE_OP_NOT_LITERAL_IGNORE:
+ GET_ARG;
+ /* The arg is just a character, nothing to check */
+ break;
+
+ case SRE_OP_SUCCESS:
+ case SRE_OP_FAILURE:
+ /* Nothing to check; these normally end the matching process */
+ break;
+
+ case SRE_OP_AT:
+ GET_ARG;
+ switch (arg) {
+ case SRE_AT_BEGINNING:
+ case SRE_AT_BEGINNING_STRING:
+ case SRE_AT_BEGINNING_LINE:
+ case SRE_AT_END:
+ case SRE_AT_END_LINE:
+ case SRE_AT_END_STRING:
+ case SRE_AT_BOUNDARY:
+ case SRE_AT_NON_BOUNDARY:
+ case SRE_AT_LOC_BOUNDARY:
+ case SRE_AT_LOC_NON_BOUNDARY:
+ case SRE_AT_UNI_BOUNDARY:
+ case SRE_AT_UNI_NON_BOUNDARY:
+ break;
+ default:
+ FAIL;
+ }
+ break;
+
+ case SRE_OP_ANY:
+ case SRE_OP_ANY_ALL:
+ /* These have no operands */
+ break;
+
+ case SRE_OP_IN:
+ case SRE_OP_IN_IGNORE:
+ GET_SKIP;
+ /* Stop 1 before the end; we check the FAILURE below */
+ if (!_validate_charset(code, code+skip-2))
+ FAIL;
+ if (code[skip-2] != SRE_OP_FAILURE)
+ FAIL;
+ code += skip-1;
+ break;
+
+ case SRE_OP_INFO:
+ {
+ /* A minimal info field is
+ <INFO> <1=skip> <2=flags> <3=min> <4=max>;
+ If SRE_INFO_PREFIX or SRE_INFO_CHARSET is in the flags,
+ more follows. */
+ SRE_CODE flags, i;
+ SRE_CODE *newcode;
+ GET_SKIP;
+ newcode = code+skip-1;
+ GET_ARG; flags = arg;
+ GET_ARG; /* min */
+ GET_ARG; /* max */
+ /* Check that only valid flags are present */
+ if ((flags & ~(SRE_INFO_PREFIX |
+ SRE_INFO_LITERAL |
+ SRE_INFO_CHARSET)) != 0)
+ FAIL;
+ /* PREFIX and CHARSET are mutually exclusive */
+ if ((flags & SRE_INFO_PREFIX) &&
+ (flags & SRE_INFO_CHARSET))
+ FAIL;
+ /* LITERAL implies PREFIX */
+ if ((flags & SRE_INFO_LITERAL) &&
+ !(flags & SRE_INFO_PREFIX))
+ FAIL;
+ /* Validate the prefix */
+ if (flags & SRE_INFO_PREFIX) {
+ SRE_CODE prefix_len;
+ GET_ARG; prefix_len = arg;
+ GET_ARG; /* prefix skip */
+ /* Here comes the prefix string */
+ if (code+prefix_len < code || code+prefix_len > newcode)
+ FAIL;
+ code += prefix_len;
+ /* And here comes the overlap table */
+ if (code+prefix_len < code || code+prefix_len > newcode)
+ FAIL;
+ /* Each overlap value should be < prefix_len */
+ for (i = 0; i < prefix_len; i++) {
+ if (code[i] >= prefix_len)
+ FAIL;
+ }
+ code += prefix_len;
+ }
+ /* Validate the charset */
+ if (flags & SRE_INFO_CHARSET) {
+ if (!_validate_charset(code, newcode-1))
+ FAIL;
+ if (newcode[-1] != SRE_OP_FAILURE)
+ FAIL;
+ code = newcode;
+ }
+ else if (code != newcode) {
+ VTRACE(("code=%p, newcode=%p\n", code, newcode));
+ FAIL;
+ }
+ }
+ break;
+
+ case SRE_OP_BRANCH:
+ {
+ SRE_CODE *target = NULL;
+ for (;;) {
+ GET_SKIP;
+ if (skip == 0)
+ break;
+ /* Stop 2 before the end; we check the JUMP below */
+ if (!_validate_inner(code, code+skip-3, groups))
+ FAIL;
+ code += skip-3;
+ /* Check that it ends with a JUMP, and that each JUMP
+ has the same target */
+ GET_OP;
+ if (op != SRE_OP_JUMP)
+ FAIL;
+ GET_SKIP;
+ if (target == NULL)
+ target = code+skip-1;
+ else if (code+skip-1 != target)
+ FAIL;
+ }
+ }
+ break;
+
+ case SRE_OP_REPEAT_ONE:
+ case SRE_OP_MIN_REPEAT_ONE:
+ {
+ SRE_CODE min, max;
+ GET_SKIP;
+ GET_ARG; min = arg;
+ GET_ARG; max = arg;
+ if (min > max)
+ FAIL;
+#ifdef Py_UNICODE_WIDE
+ if (max > 65535)
+ FAIL;
+#endif
+ if (!_validate_inner(code, code+skip-4, groups))
+ FAIL;
+ code += skip-4;
+ GET_OP;
+ if (op != SRE_OP_SUCCESS)
+ FAIL;
+ }
+ break;
+
+ case SRE_OP_REPEAT:
+ {
+ SRE_CODE min, max;
+ GET_SKIP;
+ GET_ARG; min = arg;
+ GET_ARG; max = arg;
+ if (min > max)
+ FAIL;
+#ifdef Py_UNICODE_WIDE
+ if (max > 65535)
+ FAIL;
+#endif
+ if (!_validate_inner(code, code+skip-3, groups))
+ FAIL;
+ code += skip-3;
+ GET_OP;
+ if (op != SRE_OP_MAX_UNTIL && op != SRE_OP_MIN_UNTIL)
+ FAIL;
+ }
+ break;
+
+ case SRE_OP_GROUPREF:
+ case SRE_OP_GROUPREF_IGNORE:
+ GET_ARG;
+ if (arg >= groups)
+ FAIL;
+ break;
+
+ case SRE_OP_GROUPREF_EXISTS:
+ /* The regex syntax for this is: '(?(group)then|else)', where
+ 'group' is either an integer group number or a group name,
+ 'then' and 'else' are sub-regexes, and 'else' is optional. */
+ GET_ARG;
+ if (arg >= groups)
+ FAIL;
+ GET_SKIP_ADJ(1);
+ code--; /* The skip is relative to the first arg! */
+ /* There are two possibilities here: if there is both a 'then'
+ part and an 'else' part, the generated code looks like:
+
+ GROUPREF_EXISTS
+ <group>
+ <skipyes>
+ ...then part...
+ JUMP
+ <skipno>
+ (<skipyes> jumps here)
+ ...else part...
+ (<skipno> jumps here)
+
+ If there is only a 'then' part, it looks like:
+
+ GROUPREF_EXISTS
+ <group>
+ <skip>
+ ...then part...
+ (<skip> jumps here)
+
+ There is no direct way to decide which it is, and we don't want
+ to allow arbitrary jumps anywhere in the code; so we just look
+ for a JUMP opcode preceding our skip target.
+ */
+ if (skip >= 3 && code+skip-3 >= code &&
+ code[skip-3] == SRE_OP_JUMP)
+ {
+ VTRACE(("both then and else parts present\n"));
+ if (!_validate_inner(code+1, code+skip-3, groups))
+ FAIL;
+ code += skip-2; /* Position after JUMP, at <skipno> */
+ GET_SKIP;
+ if (!_validate_inner(code, code+skip-1, groups))
+ FAIL;
+ code += skip-1;
+ }
+ else {
+ VTRACE(("only a then part present\n"));
+ if (!_validate_inner(code+1, code+skip-1, groups))
+ FAIL;
+ code += skip-1;
+ }
+ break;
+
+ case SRE_OP_ASSERT:
+ case SRE_OP_ASSERT_NOT:
+ GET_SKIP;
+ GET_ARG; /* 0 for lookahead, width for lookbehind */
+ code--; /* Back up over arg to simplify math below */
+ if (arg & 0x80000000)
+ FAIL; /* Width too large */
+ /* Stop 1 before the end; we check the SUCCESS below */
+ if (!_validate_inner(code+1, code+skip-2, groups))
+ FAIL;
+ code += skip-2;
+ GET_OP;
+ if (op != SRE_OP_SUCCESS)
+ FAIL;
+ break;
+
+ default:
+ FAIL;
+
+ }
+ }
+
+ VTRACE(("okay\n"));
+ return 1;
+}
+
+static int
+_validate_outer(SRE_CODE *code, SRE_CODE *end, Py_ssize_t groups)
+{
+ if (groups < 0 || groups > 100 || code >= end || end[-1] != SRE_OP_SUCCESS)
+ FAIL;
+ if (groups == 0) /* fix for simplejson */
+ groups = 100; /* 100 groups should always be safe */
+ return _validate_inner(code, end-1, groups);
+}
+
+static int
+_validate(PatternObject *self)
+{
+ if (!_validate_outer(self->code, self->code+self->codesize, self->groups))
+ {
+ PyErr_SetString(PyExc_RuntimeError, "invalid SRE code");
+ return 0;
+ }
+ else
+ VTRACE(("Success!\n"));
+ return 1;
+}
+
+/* -------------------------------------------------------------------- */
+/* 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**) ©->pattern, memo) ||
+ !deepcopy(©->string, memo) ||
+ !deepcopy(©->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) */
+ /* coverity[ampersand_in_size] */
+ 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_XDECREF(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;
+ self->pattern = NULL;
+
+ string = state_init(&self->state, pattern, string, start, end);
+ if (!string) {
+ Py_DECREF(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 */
+ if (PyType_Ready(&Pattern_Type) || PyType_Ready(&Match_Type) ||
+ PyType_Ready(&Scanner_Type))
+ return;
+
+ 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
+*/
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