Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1 | /* -*- Mode: C; tab-width: 4 -*- |
| 2 | * |
| 3 | * Secret Labs' Regular Expression Engine |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 4 | * |
Fredrik Lundh | 6c68dc7 | 2000-06-29 10:34:56 +0000 | [diff] [blame] | 5 | * regular expression matching engine |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 6 | * |
| 7 | * partial history: |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 8 | * 99-10-24 fl created (based on existing template matcher code) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 9 | * 99-11-13 fl added categories, branching, and more (0.2) |
| 10 | * 99-11-16 fl some tweaks to compile on non-Windows platforms |
| 11 | * 99-12-18 fl non-literals, generic maximizing repeat (0.3) |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 12 | * 00-02-28 fl tons of changes (not all to the better ;-) (0.4) |
| 13 | * 00-03-06 fl first alpha, sort of (0.5) |
| 14 | * 00-03-14 fl removed most compatibility stuff (0.6) |
| 15 | * 00-05-10 fl towards third alpha (0.8.2) |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 16 | * 00-05-13 fl added experimental scanner stuff (0.8.3) |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 17 | * 00-05-27 fl final bug hunt (0.8.4) |
| 18 | * 00-06-21 fl less bugs, more taste (0.8.5) |
| 19 | * 00-06-25 fl major changes to better deal with nested repeats (0.9) |
| 20 | * 00-06-28 fl fixed findall (0.9.1) |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 21 | * 00-06-29 fl fixed split, added more scanner features (0.9.2) |
Fredrik Lundh | c13222c | 2000-07-01 23:49:14 +0000 | [diff] [blame] | 22 | * 00-06-30 fl added fast search optimization (0.9.3) |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 23 | * 00-06-30 fl added assert (lookahead) primitives, etc (0.9.4) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 24 | * |
| 25 | * Copyright (c) 1997-2000 by Secret Labs AB. All rights reserved. |
| 26 | * |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 27 | * Portions of this engine have been developed in cooperation with |
Fredrik Lundh | 22d2546 | 2000-07-01 17:50:59 +0000 | [diff] [blame] | 28 | * CNRI. Hewlett-Packard provided funding for 2.0 integration and |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 29 | * other compatibility work. |
| 30 | */ |
| 31 | |
| 32 | #ifndef SRE_RECURSIVE |
| 33 | |
Fredrik Lundh | 43b3b49 | 2000-06-30 10:41:31 +0000 | [diff] [blame] | 34 | char copyright[] = " SRE 0.9.4 Copyright (c) 1997-2000 by Secret Labs AB "; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 35 | |
| 36 | #include "Python.h" |
| 37 | |
| 38 | #include "sre.h" |
| 39 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 40 | #if defined(HAVE_LIMITS_H) |
| 41 | #include <limits.h> |
| 42 | #else |
| 43 | #define INT_MAX 2147483647 |
| 44 | #endif |
| 45 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 46 | #include <ctype.h> |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 47 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 48 | /* name of this module, minus the leading underscore */ |
| 49 | #define MODULE "sre" |
| 50 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 51 | /* defining this one enables tracing */ |
| 52 | #undef DEBUG |
| 53 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 54 | #if PY_VERSION_HEX >= 0x01060000 |
Fredrik Lundh | 22d2546 | 2000-07-01 17:50:59 +0000 | [diff] [blame] | 55 | /* defining this enables unicode support (default under 1.6a1 and later) */ |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 56 | #define HAVE_UNICODE |
| 57 | #endif |
| 58 | |
Fredrik Lundh | 29c08be | 2000-06-29 23:33:12 +0000 | [diff] [blame] | 59 | /* optional features */ |
| 60 | #define USE_FAST_SEARCH |
| 61 | |
Fredrik Lundh | 8094611 | 2000-06-29 18:03:25 +0000 | [diff] [blame] | 62 | #if defined(_MSC_VER) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 63 | #pragma optimize("agtw", on) /* doesn't seem to make much difference... */ |
| 64 | /* fastest possible local call under MSVC */ |
| 65 | #define LOCAL(type) static __inline type __fastcall |
| 66 | #else |
Fredrik Lundh | 29c08be | 2000-06-29 23:33:12 +0000 | [diff] [blame] | 67 | #define LOCAL(type) static inline type |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 68 | #endif |
| 69 | |
| 70 | /* error codes */ |
| 71 | #define SRE_ERROR_ILLEGAL -1 /* illegal opcode */ |
| 72 | #define SRE_ERROR_MEMORY -9 /* out of memory */ |
| 73 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 74 | #if defined(DEBUG) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 75 | #define TRACE(v) printf v |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 76 | #else |
| 77 | #define TRACE(v) |
| 78 | #endif |
| 79 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 80 | #define PTR(ptr) ((SRE_CHAR*) (ptr) - (SRE_CHAR*) state->beginning) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 81 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 82 | /* -------------------------------------------------------------------- */ |
| 83 | /* search engine state */ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 84 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 85 | /* default character predicates (run sre_chars.py to regenerate tables) */ |
| 86 | |
| 87 | #define SRE_DIGIT_MASK 1 |
| 88 | #define SRE_SPACE_MASK 2 |
| 89 | #define SRE_LINEBREAK_MASK 4 |
| 90 | #define SRE_ALNUM_MASK 8 |
| 91 | #define SRE_WORD_MASK 16 |
| 92 | |
| 93 | static char sre_char_info[128] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 6, 2, |
| 94 | 2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, |
| 95 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 25, 25, 25, 25, 25, 25, 25, 25, |
| 96 | 25, 25, 0, 0, 0, 0, 0, 0, 0, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, |
| 97 | 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 0, 0, |
| 98 | 0, 0, 16, 0, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, |
| 99 | 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 0, 0, 0, 0, 0 }; |
| 100 | |
Fredrik Lundh | b389df3 | 2000-06-29 12:48:37 +0000 | [diff] [blame] | 101 | static char sre_char_lower[128] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 102 | 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, |
| 103 | 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, |
| 104 | 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, |
| 105 | 61, 62, 63, 64, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, |
| 106 | 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, |
| 107 | 122, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, |
| 108 | 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, |
| 109 | 120, 121, 122, 123, 124, 125, 126, 127 }; |
| 110 | |
Fredrik Lundh | b389df3 | 2000-06-29 12:48:37 +0000 | [diff] [blame] | 111 | static unsigned int sre_lower(unsigned int ch) |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 112 | { |
Fredrik Lundh | b389df3 | 2000-06-29 12:48:37 +0000 | [diff] [blame] | 113 | return ((ch) < 128 ? sre_char_lower[ch] : ch); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | #define SRE_IS_DIGIT(ch)\ |
| 117 | ((ch) < 128 ? (sre_char_info[(ch)] & SRE_DIGIT_MASK) : 0) |
| 118 | #define SRE_IS_SPACE(ch)\ |
| 119 | ((ch) < 128 ? (sre_char_info[(ch)] & SRE_SPACE_MASK) : 0) |
| 120 | #define SRE_IS_LINEBREAK(ch)\ |
| 121 | ((ch) < 128 ? (sre_char_info[(ch)] & SRE_LINEBREAK_MASK) : 0) |
| 122 | #define SRE_IS_ALNUM(ch)\ |
| 123 | ((ch) < 128 ? (sre_char_info[(ch)] & SRE_ALNUM_MASK) : 0) |
| 124 | #define SRE_IS_WORD(ch)\ |
| 125 | ((ch) < 128 ? (sre_char_info[(ch)] & SRE_WORD_MASK) : 0) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 126 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 127 | /* locale-specific character predicates */ |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 128 | |
Fredrik Lundh | b389df3 | 2000-06-29 12:48:37 +0000 | [diff] [blame] | 129 | static unsigned int sre_lower_locale(unsigned int ch) |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 130 | { |
| 131 | return ((ch) < 256 ? tolower((ch)) : ch); |
| 132 | } |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 133 | #define SRE_LOC_IS_DIGIT(ch) ((ch) < 256 ? isdigit((ch)) : 0) |
| 134 | #define SRE_LOC_IS_SPACE(ch) ((ch) < 256 ? isspace((ch)) : 0) |
| 135 | #define SRE_LOC_IS_LINEBREAK(ch) ((ch) == '\n') |
| 136 | #define SRE_LOC_IS_ALNUM(ch) ((ch) < 256 ? isalnum((ch)) : 0) |
| 137 | #define SRE_LOC_IS_WORD(ch) (SRE_LOC_IS_ALNUM((ch)) || (ch) == '_') |
| 138 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 139 | /* unicode-specific character predicates */ |
| 140 | |
| 141 | #if defined(HAVE_UNICODE) |
Fredrik Lundh | b389df3 | 2000-06-29 12:48:37 +0000 | [diff] [blame] | 142 | static unsigned int sre_lower_unicode(unsigned int ch) |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 143 | { |
| 144 | return (unsigned int) Py_UNICODE_TOLOWER((Py_UNICODE)(ch)); |
| 145 | } |
Fredrik Lundh | 22d2546 | 2000-07-01 17:50:59 +0000 | [diff] [blame] | 146 | |
| 147 | #if !defined(Py_UNICODE_ISALNUM) |
| 148 | /* FIXME: workaround. should be fixed in unicodectype.c */ |
| 149 | #define Py_UNICODE_ISALNUM(ch)\ |
| 150 | (Py_UNICODE_ISLOWER(ch) || Py_UNICODE_ISUPPER(ch) ||\ |
| 151 | Py_UNICODE_ISTITLE(ch) || Py_UNICODE_ISDIGIT(ch)) |
| 152 | #endif |
| 153 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 154 | #define SRE_UNI_IS_DIGIT(ch) Py_UNICODE_ISDIGIT((Py_UNICODE)(ch)) |
| 155 | #define SRE_UNI_IS_SPACE(ch) Py_UNICODE_ISSPACE((Py_UNICODE)(ch)) |
| 156 | #define SRE_UNI_IS_LINEBREAK(ch) Py_UNICODE_ISLINEBREAK((Py_UNICODE)(ch)) |
Fredrik Lundh | 22d2546 | 2000-07-01 17:50:59 +0000 | [diff] [blame] | 157 | #define SRE_UNI_IS_ALNUM(ch) Py_UNICODE_ISALNUM((Py_UNICODE)(ch)) |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 158 | #define SRE_UNI_IS_WORD(ch) (SRE_IS_ALNUM((ch)) || (ch) == '_') |
| 159 | #endif |
| 160 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 161 | LOCAL(int) |
| 162 | sre_category(SRE_CODE category, unsigned int ch) |
| 163 | { |
| 164 | switch (category) { |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 165 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 166 | case SRE_CATEGORY_DIGIT: |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 167 | return SRE_IS_DIGIT(ch); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 168 | case SRE_CATEGORY_NOT_DIGIT: |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 169 | return !SRE_IS_DIGIT(ch); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 170 | case SRE_CATEGORY_SPACE: |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 171 | return SRE_IS_SPACE(ch); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 172 | case SRE_CATEGORY_NOT_SPACE: |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 173 | return !SRE_IS_SPACE(ch); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 174 | case SRE_CATEGORY_WORD: |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 175 | return SRE_IS_WORD(ch); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 176 | case SRE_CATEGORY_NOT_WORD: |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 177 | return !SRE_IS_WORD(ch); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 178 | case SRE_CATEGORY_LINEBREAK: |
| 179 | return SRE_IS_LINEBREAK(ch); |
| 180 | case SRE_CATEGORY_NOT_LINEBREAK: |
| 181 | return !SRE_IS_LINEBREAK(ch); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 182 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 183 | case SRE_CATEGORY_LOC_WORD: |
| 184 | return SRE_LOC_IS_WORD(ch); |
| 185 | case SRE_CATEGORY_LOC_NOT_WORD: |
| 186 | return !SRE_LOC_IS_WORD(ch); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 187 | |
| 188 | #if defined(HAVE_UNICODE) |
| 189 | case SRE_CATEGORY_UNI_DIGIT: |
| 190 | return SRE_UNI_IS_DIGIT(ch); |
| 191 | case SRE_CATEGORY_UNI_NOT_DIGIT: |
| 192 | return !SRE_UNI_IS_DIGIT(ch); |
| 193 | case SRE_CATEGORY_UNI_SPACE: |
| 194 | return SRE_UNI_IS_SPACE(ch); |
| 195 | case SRE_CATEGORY_UNI_NOT_SPACE: |
| 196 | return !SRE_UNI_IS_SPACE(ch); |
| 197 | case SRE_CATEGORY_UNI_WORD: |
| 198 | return SRE_UNI_IS_WORD(ch); |
| 199 | case SRE_CATEGORY_UNI_NOT_WORD: |
| 200 | return !SRE_UNI_IS_WORD(ch); |
| 201 | case SRE_CATEGORY_UNI_LINEBREAK: |
| 202 | return SRE_UNI_IS_LINEBREAK(ch); |
| 203 | case SRE_CATEGORY_UNI_NOT_LINEBREAK: |
| 204 | return !SRE_UNI_IS_LINEBREAK(ch); |
| 205 | #endif |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 206 | } |
| 207 | return 0; |
| 208 | } |
| 209 | |
| 210 | /* helpers */ |
| 211 | |
| 212 | LOCAL(int) |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 213 | stack_free(SRE_STATE* state) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 214 | { |
| 215 | if (state->stack) { |
| 216 | TRACE(("release stack\n")); |
| 217 | free(state->stack); |
| 218 | state->stack = NULL; |
| 219 | } |
| 220 | state->stacksize = 0; |
| 221 | return 0; |
| 222 | } |
| 223 | |
| 224 | static int /* shouldn't be LOCAL */ |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 225 | stack_extend(SRE_STATE* state, int lo, int hi) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 226 | { |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 227 | SRE_STACK* stack; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 228 | int stacksize; |
| 229 | |
| 230 | /* grow the stack to a suitable size; we need at least lo entries, |
| 231 | at most hi entries. if for some reason hi is lower than lo, lo |
| 232 | wins */ |
| 233 | |
| 234 | stacksize = state->stacksize; |
| 235 | |
| 236 | if (stacksize == 0) { |
| 237 | /* create new stack */ |
| 238 | stacksize = 512; |
| 239 | if (stacksize < lo) |
| 240 | stacksize = lo; |
| 241 | else if (stacksize > hi) |
| 242 | stacksize = hi; |
| 243 | TRACE(("allocate stack %d\n", stacksize)); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 244 | stack = malloc(sizeof(SRE_STACK) * stacksize); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 245 | } else { |
| 246 | /* grow the stack (typically by a factor of two) */ |
| 247 | while (stacksize < lo) |
| 248 | stacksize = 2 * stacksize; |
| 249 | /* FIXME: <fl> could trim size if it's larger than lo, and |
| 250 | much larger than hi */ |
| 251 | TRACE(("grow stack to %d\n", stacksize)); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 252 | stack = realloc(state->stack, sizeof(SRE_STACK) * stacksize); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 253 | } |
| 254 | |
| 255 | if (!stack) { |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 256 | stack_free(state); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 257 | return SRE_ERROR_MEMORY; |
| 258 | } |
| 259 | |
| 260 | state->stack = stack; |
| 261 | state->stacksize = stacksize; |
| 262 | |
| 263 | return 0; |
| 264 | } |
| 265 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 266 | /* generate 8-bit version */ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 267 | |
| 268 | #define SRE_CHAR unsigned char |
| 269 | #define SRE_AT sre_at |
| 270 | #define SRE_MEMBER sre_member |
| 271 | #define SRE_MATCH sre_match |
| 272 | #define SRE_SEARCH sre_search |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 273 | |
| 274 | #if defined(HAVE_UNICODE) |
| 275 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 276 | #define SRE_RECURSIVE |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 277 | #include "_sre.c" |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 278 | #undef SRE_RECURSIVE |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 279 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 280 | #undef SRE_SEARCH |
| 281 | #undef SRE_MATCH |
| 282 | #undef SRE_MEMBER |
| 283 | #undef SRE_AT |
| 284 | #undef SRE_CHAR |
| 285 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 286 | /* generate 16-bit unicode version */ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 287 | |
| 288 | #define SRE_CHAR Py_UNICODE |
| 289 | #define SRE_AT sre_uat |
| 290 | #define SRE_MEMBER sre_umember |
| 291 | #define SRE_MATCH sre_umatch |
| 292 | #define SRE_SEARCH sre_usearch |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 293 | #endif |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 294 | |
| 295 | #endif /* SRE_RECURSIVE */ |
| 296 | |
| 297 | /* -------------------------------------------------------------------- */ |
| 298 | /* String matching engine */ |
| 299 | |
| 300 | /* the following section is compiled twice, with different character |
| 301 | settings */ |
| 302 | |
| 303 | LOCAL(int) |
| 304 | SRE_AT(SRE_STATE* state, SRE_CHAR* ptr, SRE_CODE at) |
| 305 | { |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 306 | /* check if pointer is at given position */ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 307 | |
| 308 | int this, that; |
| 309 | |
| 310 | switch (at) { |
Fredrik Lundh | 8094611 | 2000-06-29 18:03:25 +0000 | [diff] [blame] | 311 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 312 | case SRE_AT_BEGINNING: |
Guido van Rossum | 2953088 | 2000-04-10 17:06:55 +0000 | [diff] [blame] | 313 | return ((void*) ptr == state->beginning); |
Fredrik Lundh | 8094611 | 2000-06-29 18:03:25 +0000 | [diff] [blame] | 314 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 315 | case SRE_AT_BEGINNING_LINE: |
| 316 | return ((void*) ptr == state->beginning || |
| 317 | SRE_IS_LINEBREAK((int) ptr[-1])); |
Fredrik Lundh | 8094611 | 2000-06-29 18:03:25 +0000 | [diff] [blame] | 318 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 319 | case SRE_AT_END: |
Fredrik Lundh | ef34bd2 | 2000-06-30 21:40:20 +0000 | [diff] [blame] | 320 | return (((void*) (ptr+1) == state->end && |
| 321 | SRE_IS_LINEBREAK((int) ptr[0])) || |
| 322 | ((void*) ptr == state->end)); |
Fredrik Lundh | 8094611 | 2000-06-29 18:03:25 +0000 | [diff] [blame] | 323 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 324 | case SRE_AT_END_LINE: |
| 325 | return ((void*) ptr == state->end || |
| 326 | SRE_IS_LINEBREAK((int) ptr[0])); |
Fredrik Lundh | 8094611 | 2000-06-29 18:03:25 +0000 | [diff] [blame] | 327 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 328 | case SRE_AT_BOUNDARY: |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 329 | if (state->beginning == state->end) |
| 330 | return 0; |
| 331 | that = ((void*) ptr > state->beginning) ? |
| 332 | SRE_IS_WORD((int) ptr[-1]) : 0; |
| 333 | this = ((void*) ptr < state->end) ? |
| 334 | SRE_IS_WORD((int) ptr[0]) : 0; |
| 335 | return this != that; |
Fredrik Lundh | 8094611 | 2000-06-29 18:03:25 +0000 | [diff] [blame] | 336 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 337 | case SRE_AT_NON_BOUNDARY: |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 338 | if (state->beginning == state->end) |
| 339 | return 0; |
| 340 | that = ((void*) ptr > state->beginning) ? |
| 341 | SRE_IS_WORD((int) ptr[-1]) : 0; |
| 342 | this = ((void*) ptr < state->end) ? |
| 343 | SRE_IS_WORD((int) ptr[0]) : 0; |
| 344 | return this == that; |
| 345 | } |
| 346 | |
| 347 | return 0; |
| 348 | } |
| 349 | |
| 350 | LOCAL(int) |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 351 | SRE_MEMBER(SRE_CODE* set, SRE_CODE ch) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 352 | { |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 353 | /* check if character is a member of the given set */ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 354 | |
| 355 | int ok = 1; |
| 356 | |
| 357 | for (;;) { |
| 358 | switch (*set++) { |
| 359 | |
| 360 | case SRE_OP_NEGATE: |
| 361 | ok = !ok; |
| 362 | break; |
| 363 | |
| 364 | case SRE_OP_FAILURE: |
| 365 | return !ok; |
| 366 | |
| 367 | case SRE_OP_LITERAL: |
Fredrik Lundh | c13222c | 2000-07-01 23:49:14 +0000 | [diff] [blame] | 368 | /* args: <literal> */ |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 369 | if (ch == set[0]) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 370 | return ok; |
| 371 | set++; |
| 372 | break; |
| 373 | |
| 374 | case SRE_OP_RANGE: |
Fredrik Lundh | c13222c | 2000-07-01 23:49:14 +0000 | [diff] [blame] | 375 | /* args: <lower> <upper> */ |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 376 | if (set[0] <= ch && ch <= set[1]) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 377 | return ok; |
| 378 | set += 2; |
| 379 | break; |
| 380 | |
Fredrik Lundh | 3562f11 | 2000-07-02 12:00:07 +0000 | [diff] [blame^] | 381 | case SRE_OP_CHARSET: |
| 382 | /* args: <bitmap> (16 bits per code word) */ |
| 383 | if (ch < 256 && (set[ch >> 4] & (1 << (ch & 15)))) |
| 384 | return ok; |
| 385 | set += 16; |
| 386 | break; |
| 387 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 388 | case SRE_OP_CATEGORY: |
Fredrik Lundh | c13222c | 2000-07-01 23:49:14 +0000 | [diff] [blame] | 389 | /* args: <category> */ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 390 | if (sre_category(set[0], (int) ch)) |
| 391 | return ok; |
| 392 | set += 1; |
| 393 | break; |
| 394 | |
| 395 | default: |
Fredrik Lundh | 8094611 | 2000-06-29 18:03:25 +0000 | [diff] [blame] | 396 | /* internal error -- there's not much we can do about it |
| 397 | here, so let's just pretend it didn't match... */ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 398 | return 0; |
| 399 | } |
| 400 | } |
| 401 | } |
| 402 | |
| 403 | LOCAL(int) |
| 404 | SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern) |
| 405 | { |
| 406 | /* check if string matches the given pattern. returns -1 for |
| 407 | error, 0 for failure, and 1 for success */ |
| 408 | |
| 409 | SRE_CHAR* end = state->end; |
| 410 | SRE_CHAR* ptr = state->ptr; |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 411 | int stack; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 412 | int stackbase; |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 413 | int lastmark; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 414 | int i, count; |
| 415 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 416 | /* FIXME: this is a hack! */ |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 417 | void* mark_copy[SRE_MARK_SIZE]; |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 418 | void* mark = NULL; |
| 419 | |
| 420 | TRACE(("%8d: enter\n", PTR(ptr))); |
| 421 | |
Fredrik Lundh | 29c08be | 2000-06-29 23:33:12 +0000 | [diff] [blame] | 422 | if (pattern[0] == SRE_OP_INFO) { |
| 423 | /* optimization info block */ |
| 424 | /* args: <1=skip> <2=flags> <3=min> ... */ |
| 425 | if (pattern[3] && (end - ptr) < pattern[3]) { |
| 426 | TRACE(("reject (got %d chars, need %d)\n", |
| 427 | (end - ptr), pattern[3])); |
| 428 | return 0; |
| 429 | } |
| 430 | pattern += pattern[1] + 1; |
| 431 | } |
| 432 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 433 | stackbase = stack = state->stackbase; |
| 434 | lastmark = state->lastmark; |
| 435 | |
| 436 | retry: |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 437 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 438 | for (;;) { |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 439 | |
| 440 | switch (*pattern++) { |
| 441 | |
| 442 | case SRE_OP_FAILURE: |
| 443 | /* immediate failure */ |
| 444 | TRACE(("%8d: failure\n", PTR(ptr))); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 445 | goto failure; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 446 | |
| 447 | case SRE_OP_SUCCESS: |
| 448 | /* end of pattern */ |
| 449 | TRACE(("%8d: success\n", PTR(ptr))); |
| 450 | state->ptr = ptr; |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 451 | goto success; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 452 | |
| 453 | case SRE_OP_AT: |
| 454 | /* match at given position */ |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 455 | /* args: <at> */ |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 456 | TRACE(("%8d: position %d\n", PTR(ptr), *pattern)); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 457 | if (!SRE_AT(state, ptr, *pattern)) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 458 | goto failure; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 459 | pattern++; |
| 460 | break; |
| 461 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 462 | case SRE_OP_CATEGORY: |
| 463 | /* match at given category */ |
| 464 | /* args: <category> */ |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 465 | TRACE(("%8d: category %d [category %d]\n", PTR(ptr), |
| 466 | *ptr, *pattern)); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 467 | if (ptr >= end || !sre_category(pattern[0], ptr[0])) |
| 468 | goto failure; |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 469 | TRACE(("%8d: category ok\n", PTR(ptr))); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 470 | pattern++; |
| 471 | ptr++; |
| 472 | break; |
| 473 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 474 | case SRE_OP_LITERAL: |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 475 | /* match literal string */ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 476 | /* args: <code> */ |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 477 | TRACE(("%8d: literal %c\n", PTR(ptr), pattern[0])); |
| 478 | if (ptr >= end || (SRE_CODE) ptr[0] != pattern[0]) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 479 | goto failure; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 480 | pattern++; |
| 481 | ptr++; |
| 482 | break; |
| 483 | |
| 484 | case SRE_OP_NOT_LITERAL: |
| 485 | /* match anything that is not literal character */ |
| 486 | /* args: <code> */ |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 487 | TRACE(("%8d: literal not %c\n", PTR(ptr), pattern[0])); |
| 488 | if (ptr >= end || (SRE_CODE) ptr[0] == pattern[0]) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 489 | goto failure; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 490 | pattern++; |
| 491 | ptr++; |
| 492 | break; |
| 493 | |
| 494 | case SRE_OP_ANY: |
| 495 | /* match anything */ |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 496 | TRACE(("%8d: anything\n", PTR(ptr))); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 497 | if (ptr >= end) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 498 | goto failure; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 499 | ptr++; |
| 500 | break; |
| 501 | |
| 502 | case SRE_OP_IN: |
| 503 | /* match set member (or non_member) */ |
| 504 | /* args: <skip> <set> */ |
| 505 | TRACE(("%8d: set %c\n", PTR(ptr), *ptr)); |
| 506 | if (ptr >= end || !SRE_MEMBER(pattern + 1, *ptr)) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 507 | goto failure; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 508 | pattern += pattern[0]; |
| 509 | ptr++; |
| 510 | break; |
| 511 | |
| 512 | case SRE_OP_GROUP: |
| 513 | /* match backreference */ |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 514 | TRACE(("%8d: group %d\n", PTR(ptr), pattern[0])); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 515 | i = pattern[0]; |
| 516 | { |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 517 | SRE_CHAR* p = (SRE_CHAR*) state->mark[i+i]; |
| 518 | SRE_CHAR* e = (SRE_CHAR*) state->mark[i+i+1]; |
| 519 | if (!p || !e || e < p) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 520 | goto failure; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 521 | while (p < e) { |
| 522 | if (ptr >= end || *ptr != *p) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 523 | goto failure; |
| 524 | p++; ptr++; |
| 525 | } |
| 526 | } |
| 527 | pattern++; |
| 528 | break; |
| 529 | |
| 530 | case SRE_OP_GROUP_IGNORE: |
| 531 | /* match backreference */ |
| 532 | TRACE(("%8d: group ignore %d\n", PTR(ptr), pattern[0])); |
| 533 | i = pattern[0]; |
| 534 | { |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 535 | SRE_CHAR* p = (SRE_CHAR*) state->mark[i+i]; |
| 536 | SRE_CHAR* e = (SRE_CHAR*) state->mark[i+i+1]; |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 537 | if (!p || !e || e < p) |
| 538 | goto failure; |
| 539 | while (p < e) { |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 540 | if (ptr >= end || |
Fredrik Lundh | b389df3 | 2000-06-29 12:48:37 +0000 | [diff] [blame] | 541 | state->lower(*ptr) != state->lower(*p)) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 542 | goto failure; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 543 | p++; ptr++; |
| 544 | } |
| 545 | } |
| 546 | pattern++; |
| 547 | break; |
| 548 | |
| 549 | case SRE_OP_LITERAL_IGNORE: |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 550 | TRACE(("%8d: literal lower(%c)\n", PTR(ptr), pattern[0])); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 551 | if (ptr >= end || |
Fredrik Lundh | b389df3 | 2000-06-29 12:48:37 +0000 | [diff] [blame] | 552 | state->lower(*ptr) != state->lower(*pattern)) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 553 | goto failure; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 554 | pattern++; |
| 555 | ptr++; |
| 556 | break; |
| 557 | |
| 558 | case SRE_OP_NOT_LITERAL_IGNORE: |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 559 | TRACE(("%8d: literal not lower(%c)\n", PTR(ptr), pattern[0])); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 560 | if (ptr >= end || |
Fredrik Lundh | b389df3 | 2000-06-29 12:48:37 +0000 | [diff] [blame] | 561 | state->lower(*ptr) == state->lower(*pattern)) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 562 | goto failure; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 563 | pattern++; |
| 564 | ptr++; |
| 565 | break; |
| 566 | |
| 567 | case SRE_OP_IN_IGNORE: |
| 568 | TRACE(("%8d: set lower(%c)\n", PTR(ptr), *ptr)); |
| 569 | if (ptr >= end |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 570 | || !SRE_MEMBER(pattern+1, (SRE_CODE) state->lower(*ptr))) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 571 | goto failure; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 572 | pattern += pattern[0]; |
| 573 | ptr++; |
| 574 | break; |
| 575 | |
| 576 | case SRE_OP_MARK: |
| 577 | /* set mark */ |
| 578 | /* args: <mark> */ |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 579 | TRACE(("%8d: set mark %d\n", PTR(ptr), pattern[0])); |
| 580 | if (state->lastmark < pattern[0]) |
| 581 | state->lastmark = pattern[0]; |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 582 | if (!mark) { |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 583 | mark = mark_copy; |
| 584 | memcpy(mark, state->mark, state->lastmark*sizeof(void*)); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 585 | } |
| 586 | state->mark[pattern[0]] = ptr; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 587 | pattern++; |
| 588 | break; |
| 589 | |
| 590 | case SRE_OP_JUMP: |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 591 | case SRE_OP_INFO: |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 592 | /* jump forward */ |
| 593 | /* args: <skip> */ |
| 594 | TRACE(("%8d: jump +%d\n", PTR(ptr), pattern[0])); |
| 595 | pattern += pattern[0]; |
| 596 | break; |
| 597 | |
Fredrik Lundh | 43b3b49 | 2000-06-30 10:41:31 +0000 | [diff] [blame] | 598 | case SRE_OP_ASSERT: |
| 599 | /* assert subpattern */ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 600 | /* args: <skip> <pattern> */ |
Fredrik Lundh | 43b3b49 | 2000-06-30 10:41:31 +0000 | [diff] [blame] | 601 | TRACE(("%8d: assert subpattern\n", PTR(ptr))); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 602 | state->ptr = ptr; |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 603 | i = SRE_MATCH(state, pattern + 1); |
| 604 | if (i < 0) |
| 605 | return i; |
| 606 | if (!i) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 607 | goto failure; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 608 | pattern += pattern[0]; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 609 | break; |
Fredrik Lundh | 43b3b49 | 2000-06-30 10:41:31 +0000 | [diff] [blame] | 610 | |
| 611 | case SRE_OP_ASSERT_NOT: |
| 612 | /* assert not subpattern */ |
| 613 | /* args: <skip> <pattern> */ |
| 614 | TRACE(("%8d: assert not subpattern\n", PTR(ptr))); |
| 615 | state->ptr = ptr; |
| 616 | i = SRE_MATCH(state, pattern + 1); |
| 617 | if (i < 0) |
| 618 | return i; |
| 619 | if (i) |
| 620 | goto failure; |
| 621 | pattern += pattern[0]; |
| 622 | break; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 623 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 624 | #if 0 |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 625 | case SRE_OP_MAX_REPEAT_ONE: |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 626 | /* match repeated sequence (maximizing regexp) */ |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 627 | |
| 628 | /* this operator only works if the repeated item is |
| 629 | exactly one character wide, and we're not already |
| 630 | collecting backtracking points. for other cases, |
| 631 | use the MAX_REPEAT operator instead */ |
| 632 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 633 | /* args: <skip> <min> <max> <step> */ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 634 | TRACE(("%8d: max repeat one {%d,%d}\n", PTR(ptr), |
| 635 | pattern[1], pattern[2])); |
| 636 | |
| 637 | count = 0; |
| 638 | |
| 639 | if (pattern[3] == SRE_OP_ANY) { |
| 640 | /* repeated wildcard. skip to the end of the target |
| 641 | string, and backtrack from there */ |
| 642 | /* FIXME: must look for line endings */ |
| 643 | if (ptr + pattern[1] > end) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 644 | goto failure; /* cannot match */ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 645 | count = pattern[2]; |
| 646 | if (count > end - ptr) |
| 647 | count = end - ptr; |
| 648 | ptr += count; |
| 649 | |
| 650 | } else if (pattern[3] == SRE_OP_LITERAL) { |
| 651 | /* repeated literal */ |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 652 | SRE_CODE chr = pattern[4]; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 653 | while (count < (int) pattern[2]) { |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 654 | if (ptr >= end || (SRE_CODE) ptr[0] != chr) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 655 | break; |
| 656 | ptr++; |
| 657 | count++; |
| 658 | } |
| 659 | |
| 660 | } else if (pattern[3] == SRE_OP_LITERAL_IGNORE) { |
| 661 | /* repeated literal */ |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 662 | SRE_CODE chr = pattern[4]; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 663 | while (count < (int) pattern[2]) { |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 664 | if (ptr >= end || (SRE_CODE) state->lower(*ptr) != chr) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 665 | break; |
| 666 | ptr++; |
| 667 | count++; |
| 668 | } |
| 669 | |
| 670 | } else if (pattern[3] == SRE_OP_NOT_LITERAL) { |
| 671 | /* repeated non-literal */ |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 672 | SRE_CODE chr = pattern[4]; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 673 | while (count < (int) pattern[2]) { |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 674 | if (ptr >= end || (SRE_CODE) ptr[0] == chr) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 675 | break; |
| 676 | ptr++; |
| 677 | count++; |
| 678 | } |
| 679 | |
| 680 | } else if (pattern[3] == SRE_OP_NOT_LITERAL_IGNORE) { |
| 681 | /* repeated non-literal */ |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 682 | SRE_CODE chr = pattern[4]; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 683 | while (count < (int) pattern[2]) { |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 684 | if (ptr >= end || (SRE_CODE) state->lower(ptr[0]) == chr) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 685 | break; |
| 686 | ptr++; |
| 687 | count++; |
| 688 | } |
| 689 | |
| 690 | } else if (pattern[3] == SRE_OP_IN) { |
| 691 | /* repeated set */ |
| 692 | while (count < (int) pattern[2]) { |
| 693 | if (ptr >= end || !SRE_MEMBER(pattern + 5, *ptr)) |
| 694 | break; |
| 695 | ptr++; |
| 696 | count++; |
| 697 | } |
| 698 | |
| 699 | } else { |
| 700 | /* repeated single character pattern */ |
| 701 | state->ptr = ptr; |
| 702 | while (count < (int) pattern[2]) { |
| 703 | i = SRE_MATCH(state, pattern + 3); |
| 704 | if (i < 0) |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 705 | return i; |
| 706 | if (!i) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 707 | break; |
| 708 | count++; |
| 709 | } |
| 710 | state->ptr = ptr; |
| 711 | ptr += count; |
| 712 | } |
| 713 | |
| 714 | /* when we arrive here, count contains the number of |
| 715 | matches, and ptr points to the tail of the target |
| 716 | string. check if the rest of the pattern matches, and |
| 717 | backtrack if not. */ |
| 718 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 719 | TRACE(("%8d: repeat %d found\n", PTR(ptr), count)); |
| 720 | |
| 721 | if (count < (int) pattern[1]) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 722 | goto failure; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 723 | |
| 724 | if (pattern[pattern[0]] == SRE_OP_SUCCESS) { |
| 725 | /* tail is empty. we're finished */ |
| 726 | TRACE(("%8d: tail is empty\n", PTR(ptr))); |
| 727 | state->ptr = ptr; |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 728 | goto success; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 729 | |
| 730 | } else if (pattern[pattern[0]] == SRE_OP_LITERAL) { |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 731 | /* tail starts with a literal. skip positions where |
| 732 | the rest of the pattern cannot possibly match */ |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 733 | SRE_CODE chr = pattern[pattern[0]+1]; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 734 | TRACE(("%8d: tail is literal %d\n", PTR(ptr), chr)); |
| 735 | for (;;) { |
| 736 | TRACE(("%8d: scan for tail match\n", PTR(ptr))); |
| 737 | while (count >= (int) pattern[1] && |
| 738 | (ptr >= end || *ptr != chr)) { |
| 739 | ptr--; |
| 740 | count--; |
| 741 | } |
| 742 | TRACE(("%8d: check tail\n", PTR(ptr))); |
| 743 | if (count < (int) pattern[1]) |
| 744 | break; |
| 745 | state->ptr = ptr; |
| 746 | i = SRE_MATCH(state, pattern + pattern[0]); |
| 747 | if (i > 0) { |
| 748 | TRACE(("%8d: repeat %d picked\n", PTR(ptr), count)); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 749 | goto success; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 750 | } |
| 751 | TRACE(("%8d: BACKTRACK\n", PTR(ptr))); |
| 752 | ptr--; |
| 753 | count--; |
| 754 | } |
| 755 | |
| 756 | } else { |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 757 | /* general case */ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 758 | TRACE(("%8d: tail is pattern\n", PTR(ptr))); |
| 759 | while (count >= (int) pattern[1]) { |
| 760 | state->ptr = ptr; |
| 761 | i = SRE_MATCH(state, pattern + pattern[0]); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 762 | if (i < 0) |
| 763 | return i; |
| 764 | if (i) { |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 765 | TRACE(("%8d: repeat %d picked\n", PTR(ptr), count)); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 766 | goto success; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 767 | } |
| 768 | TRACE(("%8d: BACKTRACK\n", PTR(ptr))); |
| 769 | ptr--; |
| 770 | count--; |
| 771 | } |
| 772 | } |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 773 | goto failure; |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 774 | #endif |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 775 | |
| 776 | case SRE_OP_MAX_REPEAT: |
| 777 | /* match repeated sequence (maximizing regexp). repeated |
| 778 | group should end with a MAX_UNTIL code */ |
| 779 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 780 | /* args: <skip> <min> <max> <item> */ |
| 781 | |
| 782 | TRACE(("%8d: max repeat (%d %d)\n", PTR(ptr), |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 783 | pattern[1], pattern[2])); |
| 784 | |
| 785 | count = 0; |
| 786 | state->ptr = ptr; |
| 787 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 788 | /* match minimum number of items */ |
| 789 | while (count < (int) pattern[1]) { |
| 790 | i = SRE_MATCH(state, pattern + 3); |
| 791 | if (i < 0) |
| 792 | return i; |
| 793 | if (!i) |
| 794 | goto failure; |
| 795 | if (state->ptr == ptr) { |
| 796 | /* if the match was successful but empty, set the |
| 797 | count to max and terminate the scanning loop */ |
| 798 | count = (int) pattern[2]; |
| 799 | break; |
| 800 | } |
| 801 | count++; |
| 802 | ptr = state->ptr; |
| 803 | } |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 804 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 805 | TRACE(("%8d: found %d leading items\n", PTR(ptr), count)); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 806 | |
| 807 | if (count < (int) pattern[1]) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 808 | goto failure; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 809 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 810 | /* match maximum number of items, pushing alternate end |
| 811 | points to the stack */ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 812 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 813 | while (pattern[2] == 32767 || count < (int) pattern[2]) { |
| 814 | state->stackbase = stack; |
| 815 | i = SRE_MATCH(state, pattern + 3); |
| 816 | state->stackbase = stackbase; /* rewind */ |
| 817 | if (i < 0) |
| 818 | return i; |
| 819 | if (!i) |
| 820 | break; |
| 821 | if (state->ptr == ptr) { |
| 822 | count = (int) pattern[2]; |
| 823 | break; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 824 | } |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 825 | /* this position was valid; add it to the retry |
| 826 | stack */ |
| 827 | if (stack >= state->stacksize) { |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 828 | i = stack_extend(state, stack + 1, |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 829 | stackbase + pattern[2]); |
| 830 | if (i < 0) |
| 831 | return i; /* out of memory */ |
| 832 | } |
| 833 | TRACE(("%8d: stack[%d] = %d\n", PTR(ptr), stack, PTR(ptr))); |
| 834 | state->stack[stack].ptr = ptr; |
| 835 | state->stack[stack].pattern = pattern + pattern[0]; |
| 836 | stack++; |
| 837 | /* move forward */ |
| 838 | ptr = state->ptr; |
| 839 | count++; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 840 | } |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 841 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 842 | /* when we get here, count is the number of successful |
| 843 | matches, and ptr points to the tail. */ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 844 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 845 | TRACE(("%8d: skip +%d\n", PTR(ptr), pattern[0])); |
| 846 | |
| 847 | pattern += pattern[0]; |
| 848 | break; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 849 | |
| 850 | case SRE_OP_MIN_REPEAT: |
| 851 | /* match repeated sequence (minimizing regexp) */ |
| 852 | TRACE(("%8d: min repeat %d %d\n", PTR(ptr), |
| 853 | pattern[1], pattern[2])); |
| 854 | count = 0; |
| 855 | state->ptr = ptr; |
| 856 | /* match minimum number of items */ |
| 857 | while (count < (int) pattern[1]) { |
| 858 | i = SRE_MATCH(state, pattern + 3); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 859 | if (i < 0) |
| 860 | return i; |
| 861 | if (!i) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 862 | goto failure; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 863 | count++; |
| 864 | } |
| 865 | /* move forward until the tail matches. */ |
| 866 | while (count <= (int) pattern[2]) { |
| 867 | ptr = state->ptr; |
| 868 | i = SRE_MATCH(state, pattern + pattern[0]); |
| 869 | if (i > 0) { |
| 870 | TRACE(("%8d: repeat %d picked\n", PTR(ptr), count)); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 871 | goto success; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 872 | } |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 873 | state->ptr = ptr; /* backtrack */ |
| 874 | i = SRE_MATCH(state, pattern + 3); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 875 | if (i < 0) |
| 876 | return i; |
| 877 | if (!i) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 878 | goto failure; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 879 | count++; |
| 880 | } |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 881 | goto failure; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 882 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 883 | case SRE_OP_BRANCH: |
| 884 | /* match one of several subpatterns */ |
| 885 | /* format: <branch> <size> <head> ... <null> <tail> */ |
| 886 | TRACE(("%8d: branch\n", PTR(ptr))); |
| 887 | while (*pattern) { |
| 888 | if (pattern[1] != SRE_OP_LITERAL || |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 889 | (ptr < end && (SRE_CODE) ptr[0] == pattern[2])) { |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 890 | TRACE(("%8d: branch check\n", PTR(ptr))); |
| 891 | state->ptr = ptr; |
| 892 | i = SRE_MATCH(state, pattern + 1); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 893 | if (i < 0) |
| 894 | return i; |
| 895 | if (i) { |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 896 | TRACE(("%8d: branch succeeded\n", PTR(ptr))); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 897 | goto success; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 898 | } |
| 899 | } |
| 900 | pattern += *pattern; |
| 901 | } |
| 902 | TRACE(("%8d: branch failed\n", PTR(ptr))); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 903 | goto failure; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 904 | |
| 905 | case SRE_OP_REPEAT: |
| 906 | /* TEMPLATE: match repeated sequence (no backtracking) */ |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 907 | /* args: <skip> <min> <max> */ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 908 | TRACE(("%8d: repeat %d %d\n", PTR(ptr), pattern[1], pattern[2])); |
| 909 | count = 0; |
| 910 | state->ptr = ptr; |
| 911 | while (count < (int) pattern[2]) { |
| 912 | i = SRE_MATCH(state, pattern + 3); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 913 | if (i < 0) |
| 914 | return i; |
| 915 | if (!i) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 916 | break; |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 917 | if (state->ptr == ptr) { |
| 918 | count = (int) pattern[2]; |
| 919 | break; |
| 920 | } |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 921 | count++; |
| 922 | } |
| 923 | if (count <= (int) pattern[1]) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 924 | goto failure; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 925 | TRACE(("%8d: repeat %d matches\n", PTR(ptr), count)); |
| 926 | pattern += pattern[0]; |
| 927 | ptr = state->ptr; |
| 928 | break; |
| 929 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 930 | default: |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 931 | TRACE(("%8d: unknown opcode %d\n", PTR(ptr), pattern[-1])); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 932 | return SRE_ERROR_ILLEGAL; |
| 933 | } |
| 934 | } |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 935 | |
| 936 | failure: |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 937 | if (stack-- > stackbase) { |
| 938 | ptr = state->stack[stack].ptr; |
| 939 | pattern = state->stack[stack].pattern; |
| 940 | TRACE(("%8d: retry (%d)\n", PTR(ptr), stack)); |
| 941 | goto retry; |
| 942 | } |
| 943 | TRACE(("%8d: leave (failure)\n", PTR(ptr))); |
| 944 | state->stackbase = stackbase; |
| 945 | state->lastmark = lastmark; |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 946 | if (mark) |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 947 | memcpy(state->mark, mark, state->lastmark*sizeof(void*)); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 948 | return 0; |
| 949 | |
| 950 | success: |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 951 | TRACE(("%8d: leave (success)\n", PTR(ptr))); |
| 952 | state->stackbase = stackbase; |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 953 | return 1; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 954 | } |
| 955 | |
| 956 | LOCAL(int) |
| 957 | SRE_SEARCH(SRE_STATE* state, SRE_CODE* pattern) |
| 958 | { |
| 959 | SRE_CHAR* ptr = state->start; |
| 960 | SRE_CHAR* end = state->end; |
| 961 | int status = 0; |
Fredrik Lundh | 3562f11 | 2000-07-02 12:00:07 +0000 | [diff] [blame^] | 962 | int prefix_len; |
| 963 | SRE_CODE* prefix = NULL; |
| 964 | SRE_CODE* charset = NULL; |
| 965 | SRE_CODE* overlap = NULL; |
| 966 | int flags = 0; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 967 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 968 | if (pattern[0] == SRE_OP_INFO) { |
Fredrik Lundh | 29c08be | 2000-06-29 23:33:12 +0000 | [diff] [blame] | 969 | /* optimization info block */ |
Fredrik Lundh | 3562f11 | 2000-07-02 12:00:07 +0000 | [diff] [blame^] | 970 | /* args: <1=skip> <2=flags> <3=min> <4=max> <5=prefix info> */ |
| 971 | |
| 972 | flags = pattern[2]; |
Fredrik Lundh | 29c08be | 2000-06-29 23:33:12 +0000 | [diff] [blame] | 973 | |
| 974 | if (pattern[3] > 0) { |
| 975 | /* adjust end point (but make sure we leave at least one |
Fredrik Lundh | 3562f11 | 2000-07-02 12:00:07 +0000 | [diff] [blame^] | 976 | character in there, so literal search will work) */ |
Fredrik Lundh | 29c08be | 2000-06-29 23:33:12 +0000 | [diff] [blame] | 977 | end -= pattern[3]-1; |
| 978 | if (end <= ptr) |
| 979 | end = ptr+1; |
| 980 | } |
| 981 | |
Fredrik Lundh | 3562f11 | 2000-07-02 12:00:07 +0000 | [diff] [blame^] | 982 | if (flags & SRE_INFO_PREFIX) { |
| 983 | prefix_len = pattern[5]; |
| 984 | prefix = pattern + 6; |
| 985 | overlap = prefix + prefix_len - 1; |
| 986 | } else if (flags & SRE_INFO_CHARSET) |
| 987 | charset = pattern + 5; |
Fredrik Lundh | 29c08be | 2000-06-29 23:33:12 +0000 | [diff] [blame] | 988 | |
| 989 | pattern += 1 + pattern[1]; |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 990 | } |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 991 | |
Fredrik Lundh | 29c08be | 2000-06-29 23:33:12 +0000 | [diff] [blame] | 992 | #if defined(USE_FAST_SEARCH) |
Fredrik Lundh | 3562f11 | 2000-07-02 12:00:07 +0000 | [diff] [blame^] | 993 | if (prefix && overlap && prefix_len > 1) { |
Fredrik Lundh | 29c08be | 2000-06-29 23:33:12 +0000 | [diff] [blame] | 994 | /* pattern starts with a known prefix. use the overlap |
| 995 | table to skip forward as fast as we possibly can */ |
| 996 | int i = 0; |
| 997 | end = state->end; |
| 998 | while (ptr < end) { |
| 999 | for (;;) { |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 1000 | if ((SRE_CODE) ptr[0] != prefix[i]) { |
Fredrik Lundh | 29c08be | 2000-06-29 23:33:12 +0000 | [diff] [blame] | 1001 | if (!i) |
| 1002 | break; |
| 1003 | else |
| 1004 | i = overlap[i]; |
| 1005 | } else { |
| 1006 | if (++i == prefix_len) { |
| 1007 | /* found a potential match */ |
| 1008 | TRACE(("%8d: === SEARCH === hit\n", PTR(ptr))); |
| 1009 | state->start = ptr - prefix_len + 1; |
| 1010 | state->ptr = ptr + 1; |
Fredrik Lundh | 3562f11 | 2000-07-02 12:00:07 +0000 | [diff] [blame^] | 1011 | if (flags & SRE_INFO_LITERAL) |
| 1012 | return 1; /* we got all of it */ |
Fredrik Lundh | 29c08be | 2000-06-29 23:33:12 +0000 | [diff] [blame] | 1013 | status = SRE_MATCH(state, pattern + 2*prefix_len); |
| 1014 | if (status != 0) |
| 1015 | return status; |
| 1016 | /* close but no cigar -- try again */ |
| 1017 | i = overlap[i]; |
| 1018 | } |
| 1019 | break; |
| 1020 | } |
| 1021 | |
| 1022 | } |
| 1023 | ptr++; |
| 1024 | } |
| 1025 | return 0; |
| 1026 | } |
| 1027 | #endif |
Fredrik Lundh | 8094611 | 2000-06-29 18:03:25 +0000 | [diff] [blame] | 1028 | |
Fredrik Lundh | 3562f11 | 2000-07-02 12:00:07 +0000 | [diff] [blame^] | 1029 | if (pattern[0] == SRE_OP_LITERAL) { |
| 1030 | /* pattern starts with a literal character. this is used |
| 1031 | for short prefixes, and if fast search is disabled */ |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 1032 | SRE_CODE chr = pattern[1]; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1033 | for (;;) { |
Fredrik Lundh | 0640e11 | 2000-06-30 13:55:15 +0000 | [diff] [blame] | 1034 | while (ptr < end && (SRE_CODE) ptr[0] != chr) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1035 | ptr++; |
| 1036 | if (ptr == end) |
| 1037 | return 0; |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1038 | TRACE(("%8d: === SEARCH === literal\n", PTR(ptr))); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1039 | state->start = ptr; |
| 1040 | state->ptr = ++ptr; |
| 1041 | status = SRE_MATCH(state, pattern + 2); |
| 1042 | if (status != 0) |
| 1043 | break; |
| 1044 | } |
Fredrik Lundh | 3562f11 | 2000-07-02 12:00:07 +0000 | [diff] [blame^] | 1045 | #if 0 |
| 1046 | } else if (charset) { |
| 1047 | /* pattern starts with a character from a known set */ |
| 1048 | for (;;) { |
| 1049 | while (ptr < end && !SRE_MEMBER(charset, ptr[0])) |
| 1050 | ptr++; |
| 1051 | if (ptr == end) |
| 1052 | return 0; |
| 1053 | TRACE(("%8d: === SEARCH === charset\n", PTR(ptr))); |
| 1054 | state->start = ptr; |
| 1055 | state->ptr = ptr; |
| 1056 | status = SRE_MATCH(state, pattern); |
| 1057 | if (status != 0) |
| 1058 | break; |
| 1059 | } |
| 1060 | #endif |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1061 | } else |
Fredrik Lundh | 29c08be | 2000-06-29 23:33:12 +0000 | [diff] [blame] | 1062 | /* general case */ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1063 | while (ptr <= end) { |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1064 | TRACE(("%8d: === SEARCH ===\n", PTR(ptr))); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1065 | state->start = state->ptr = ptr++; |
| 1066 | status = SRE_MATCH(state, pattern); |
| 1067 | if (status != 0) |
| 1068 | break; |
| 1069 | } |
| 1070 | |
| 1071 | return status; |
| 1072 | } |
Fredrik Lundh | 3562f11 | 2000-07-02 12:00:07 +0000 | [diff] [blame^] | 1073 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1074 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1075 | #if !defined(SRE_RECURSIVE) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1076 | |
| 1077 | /* -------------------------------------------------------------------- */ |
| 1078 | /* factories and destructors */ |
| 1079 | |
| 1080 | /* see sre.h for object declarations */ |
| 1081 | |
| 1082 | staticforward PyTypeObject Pattern_Type; |
| 1083 | staticforward PyTypeObject Match_Type; |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 1084 | staticforward PyTypeObject Scanner_Type; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1085 | |
| 1086 | static PyObject * |
| 1087 | _compile(PyObject* self_, PyObject* args) |
| 1088 | { |
| 1089 | /* "compile" pattern descriptor to pattern object */ |
| 1090 | |
| 1091 | PatternObject* self; |
| 1092 | |
| 1093 | PyObject* pattern; |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1094 | int flags = 0; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1095 | PyObject* code; |
| 1096 | int groups = 0; |
| 1097 | PyObject* groupindex = NULL; |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1098 | if (!PyArg_ParseTuple(args, "OiO!|iO", &pattern, &flags, |
| 1099 | &PyString_Type, &code, |
| 1100 | &groups, &groupindex)) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1101 | return NULL; |
| 1102 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1103 | self = PyObject_NEW(PatternObject, &Pattern_Type); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1104 | if (self == NULL) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1105 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1106 | return NULL; |
| 1107 | |
| 1108 | Py_INCREF(pattern); |
| 1109 | self->pattern = pattern; |
| 1110 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1111 | self->flags = flags; |
| 1112 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1113 | Py_INCREF(code); |
| 1114 | self->code = code; |
| 1115 | |
| 1116 | self->groups = groups; |
| 1117 | |
| 1118 | Py_XINCREF(groupindex); |
| 1119 | self->groupindex = groupindex; |
| 1120 | |
| 1121 | return (PyObject*) self; |
| 1122 | } |
| 1123 | |
| 1124 | static PyObject * |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1125 | sre_codesize(PyObject* self, PyObject* args) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1126 | { |
| 1127 | return Py_BuildValue("i", sizeof(SRE_CODE)); |
| 1128 | } |
| 1129 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1130 | static PyObject * |
Fredrik Lundh | b389df3 | 2000-06-29 12:48:37 +0000 | [diff] [blame] | 1131 | sre_getlower(PyObject* self, PyObject* args) |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1132 | { |
| 1133 | int character, flags; |
| 1134 | if (!PyArg_ParseTuple(args, "ii", &character, &flags)) |
| 1135 | return NULL; |
| 1136 | if (flags & SRE_FLAG_LOCALE) |
Fredrik Lundh | b389df3 | 2000-06-29 12:48:37 +0000 | [diff] [blame] | 1137 | return Py_BuildValue("i", sre_lower_locale(character)); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1138 | #if defined(HAVE_UNICODE) |
| 1139 | if (flags & SRE_FLAG_UNICODE) |
Fredrik Lundh | b389df3 | 2000-06-29 12:48:37 +0000 | [diff] [blame] | 1140 | return Py_BuildValue("i", sre_lower_unicode(character)); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1141 | #endif |
Fredrik Lundh | b389df3 | 2000-06-29 12:48:37 +0000 | [diff] [blame] | 1142 | return Py_BuildValue("i", sre_lower(character)); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1143 | } |
| 1144 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1145 | LOCAL(PyObject*) |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1146 | state_init(SRE_STATE* state, PatternObject* pattern, PyObject* args) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1147 | { |
| 1148 | /* prepare state object */ |
| 1149 | |
| 1150 | PyBufferProcs *buffer; |
| 1151 | int i, count; |
| 1152 | void* ptr; |
| 1153 | |
| 1154 | PyObject* string; |
| 1155 | int start = 0; |
| 1156 | int end = INT_MAX; |
| 1157 | if (!PyArg_ParseTuple(args, "O|ii", &string, &start, &end)) |
| 1158 | return NULL; |
| 1159 | |
| 1160 | /* get pointer to string buffer */ |
| 1161 | buffer = string->ob_type->tp_as_buffer; |
| 1162 | if (!buffer || !buffer->bf_getreadbuffer || !buffer->bf_getsegcount || |
| 1163 | buffer->bf_getsegcount(string, NULL) != 1) { |
| 1164 | PyErr_SetString(PyExc_TypeError, "expected read-only buffer"); |
| 1165 | return NULL; |
| 1166 | } |
| 1167 | |
| 1168 | /* determine buffer size */ |
| 1169 | count = buffer->bf_getreadbuffer(string, 0, &ptr); |
| 1170 | if (count < 0) { |
| 1171 | /* sanity check */ |
| 1172 | PyErr_SetString(PyExc_TypeError, "buffer has negative size"); |
| 1173 | return NULL; |
| 1174 | } |
| 1175 | |
| 1176 | /* determine character size */ |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1177 | #if defined(HAVE_UNICODE) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1178 | state->charsize = (PyUnicode_Check(string) ? sizeof(Py_UNICODE) : 1); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1179 | #else |
| 1180 | state->charsize = 1; |
| 1181 | #endif |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1182 | |
| 1183 | count /= state->charsize; |
| 1184 | |
| 1185 | /* adjust boundaries */ |
| 1186 | if (start < 0) |
| 1187 | start = 0; |
| 1188 | else if (start > count) |
| 1189 | start = count; |
| 1190 | |
| 1191 | if (end < 0) |
| 1192 | end = 0; |
| 1193 | else if (end > count) |
| 1194 | end = count; |
| 1195 | |
| 1196 | state->beginning = ptr; |
| 1197 | |
| 1198 | state->start = (void*) ((char*) ptr + start * state->charsize); |
| 1199 | state->end = (void*) ((char*) ptr + end * state->charsize); |
| 1200 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1201 | state->lastmark = 0; |
| 1202 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1203 | /* FIXME: dynamic! */ |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 1204 | for (i = 0; i < SRE_MARK_SIZE; i++) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1205 | state->mark[i] = NULL; |
| 1206 | |
| 1207 | state->stack = NULL; |
| 1208 | state->stackbase = 0; |
| 1209 | state->stacksize = 0; |
| 1210 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1211 | if (pattern->flags & SRE_FLAG_LOCALE) |
Fredrik Lundh | b389df3 | 2000-06-29 12:48:37 +0000 | [diff] [blame] | 1212 | state->lower = sre_lower_locale; |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1213 | #if defined(HAVE_UNICODE) |
| 1214 | else if (pattern->flags & SRE_FLAG_UNICODE) |
Fredrik Lundh | b389df3 | 2000-06-29 12:48:37 +0000 | [diff] [blame] | 1215 | state->lower = sre_lower_unicode; |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1216 | #endif |
| 1217 | else |
Fredrik Lundh | b389df3 | 2000-06-29 12:48:37 +0000 | [diff] [blame] | 1218 | state->lower = sre_lower; |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1219 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1220 | return string; |
| 1221 | } |
| 1222 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1223 | LOCAL(void) |
| 1224 | state_fini(SRE_STATE* state) |
| 1225 | { |
| 1226 | stack_free(state); |
| 1227 | } |
| 1228 | |
| 1229 | LOCAL(PyObject*) |
| 1230 | state_getslice(SRE_STATE* state, int index, PyObject* string) |
| 1231 | { |
| 1232 | index = (index - 1) * 2; |
| 1233 | |
| 1234 | if (string == Py_None || !state->mark[index] || !state->mark[index+1]) { |
| 1235 | Py_INCREF(Py_None); |
| 1236 | return Py_None; |
| 1237 | } |
| 1238 | |
| 1239 | return PySequence_GetSlice( |
| 1240 | string, |
| 1241 | ((char*)state->mark[index] - (char*)state->beginning) / |
| 1242 | state->charsize, |
| 1243 | ((char*)state->mark[index+1] - (char*)state->beginning) / |
| 1244 | state->charsize |
| 1245 | ); |
| 1246 | } |
| 1247 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1248 | static PyObject* |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1249 | pattern_new_match(PatternObject* pattern, SRE_STATE* state, |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1250 | PyObject* string, int status) |
| 1251 | { |
| 1252 | /* create match object (from state object) */ |
| 1253 | |
| 1254 | MatchObject* match; |
| 1255 | int i, j; |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1256 | char* base; |
| 1257 | int n; |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1258 | |
| 1259 | if (status > 0) { |
| 1260 | |
| 1261 | /* create match object (with room for extra group marks) */ |
| 1262 | match = PyObject_NEW_VAR(MatchObject, &Match_Type, 2*pattern->groups); |
| 1263 | if (match == NULL) |
| 1264 | return NULL; |
| 1265 | |
| 1266 | Py_INCREF(pattern); |
| 1267 | match->pattern = pattern; |
| 1268 | |
| 1269 | Py_INCREF(string); |
| 1270 | match->string = string; |
| 1271 | |
| 1272 | match->groups = pattern->groups+1; |
| 1273 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1274 | base = (char*) state->beginning; |
| 1275 | n = state->charsize; |
| 1276 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1277 | /* group zero */ |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1278 | match->mark[0] = ((char*) state->start - base) / n; |
| 1279 | match->mark[1] = ((char*) state->ptr - base) / n; |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1280 | |
| 1281 | /* fill in the rest of the groups */ |
| 1282 | for (i = j = 0; i < pattern->groups; i++, j+=2) |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1283 | if (j+1 <= state->lastmark && state->mark[j] && state->mark[j+1]) { |
| 1284 | match->mark[j+2] = ((char*) state->mark[j] - base) / n; |
| 1285 | match->mark[j+3] = ((char*) state->mark[j+1] - base) / n; |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1286 | } else |
| 1287 | match->mark[j+2] = match->mark[j+3] = -1; /* undefined */ |
| 1288 | |
| 1289 | return (PyObject*) match; |
| 1290 | |
| 1291 | } else if (status < 0) { |
| 1292 | |
| 1293 | /* internal error */ |
| 1294 | PyErr_SetString( |
| 1295 | PyExc_RuntimeError, "internal error in regular expression engine" |
| 1296 | ); |
| 1297 | return NULL; |
| 1298 | |
| 1299 | } |
| 1300 | |
| 1301 | Py_INCREF(Py_None); |
| 1302 | return Py_None; |
| 1303 | } |
| 1304 | |
| 1305 | static PyObject* |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 1306 | pattern_scanner(PatternObject* pattern, PyObject* args) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1307 | { |
| 1308 | /* create search state object */ |
| 1309 | |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 1310 | ScannerObject* self; |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1311 | PyObject* string; |
| 1312 | |
| 1313 | /* create match object (with room for extra group marks) */ |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 1314 | self = PyObject_NEW(ScannerObject, &Scanner_Type); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1315 | if (self == NULL) |
| 1316 | return NULL; |
| 1317 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1318 | string = state_init(&self->state, pattern, args); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1319 | if (!string) { |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1320 | PyObject_DEL(self); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1321 | return NULL; |
| 1322 | } |
| 1323 | |
| 1324 | Py_INCREF(pattern); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1325 | self->pattern = (PyObject*) pattern; |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1326 | |
| 1327 | Py_INCREF(string); |
| 1328 | self->string = string; |
| 1329 | |
| 1330 | return (PyObject*) self; |
| 1331 | } |
| 1332 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1333 | static void |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1334 | pattern_dealloc(PatternObject* self) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1335 | { |
| 1336 | Py_XDECREF(self->code); |
| 1337 | Py_XDECREF(self->pattern); |
| 1338 | Py_XDECREF(self->groupindex); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1339 | PyMem_DEL(self); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1340 | } |
| 1341 | |
| 1342 | static PyObject* |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1343 | pattern_match(PatternObject* self, PyObject* args) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1344 | { |
| 1345 | SRE_STATE state; |
| 1346 | PyObject* string; |
| 1347 | int status; |
| 1348 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1349 | string = state_init(&state, self, args); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1350 | if (!string) |
| 1351 | return NULL; |
| 1352 | |
| 1353 | state.ptr = state.start; |
| 1354 | |
| 1355 | if (state.charsize == 1) { |
| 1356 | status = sre_match(&state, PatternObject_GetCode(self)); |
| 1357 | } else { |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1358 | #if defined(HAVE_UNICODE) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1359 | status = sre_umatch(&state, PatternObject_GetCode(self)); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1360 | #endif |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1361 | } |
| 1362 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1363 | state_fini(&state); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1364 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1365 | return pattern_new_match(self, &state, string, status); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1366 | } |
| 1367 | |
| 1368 | static PyObject* |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1369 | pattern_search(PatternObject* self, PyObject* args) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1370 | { |
| 1371 | SRE_STATE state; |
| 1372 | PyObject* string; |
| 1373 | int status; |
| 1374 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1375 | string = state_init(&state, self, args); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1376 | if (!string) |
| 1377 | return NULL; |
| 1378 | |
| 1379 | if (state.charsize == 1) { |
| 1380 | status = sre_search(&state, PatternObject_GetCode(self)); |
| 1381 | } else { |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1382 | #if defined(HAVE_UNICODE) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1383 | status = sre_usearch(&state, PatternObject_GetCode(self)); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1384 | #endif |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1385 | } |
| 1386 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1387 | state_fini(&state); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1388 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1389 | return pattern_new_match(self, &state, string, status); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1390 | } |
| 1391 | |
| 1392 | static PyObject* |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1393 | call(char* function, PyObject* args) |
| 1394 | { |
| 1395 | PyObject* name; |
| 1396 | PyObject* module; |
| 1397 | PyObject* func; |
| 1398 | PyObject* result; |
| 1399 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1400 | name = PyString_FromString(MODULE); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1401 | if (!name) |
| 1402 | return NULL; |
| 1403 | module = PyImport_Import(name); |
| 1404 | Py_DECREF(name); |
| 1405 | if (!module) |
| 1406 | return NULL; |
| 1407 | func = PyObject_GetAttrString(module, function); |
| 1408 | Py_DECREF(module); |
| 1409 | if (!func) |
| 1410 | return NULL; |
| 1411 | result = PyObject_CallObject(func, args); |
| 1412 | Py_DECREF(func); |
| 1413 | Py_DECREF(args); |
| 1414 | return result; |
| 1415 | } |
| 1416 | |
| 1417 | static PyObject* |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1418 | pattern_sub(PatternObject* self, PyObject* args) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1419 | { |
| 1420 | PyObject* template; |
| 1421 | PyObject* string; |
| 1422 | PyObject* count; |
| 1423 | if (!PyArg_ParseTuple(args, "OOO", &template, &string, &count)) |
| 1424 | return NULL; |
| 1425 | |
| 1426 | /* delegate to Python code */ |
| 1427 | return call("_sub", Py_BuildValue("OOOO", self, template, string, count)); |
| 1428 | } |
| 1429 | |
| 1430 | static PyObject* |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1431 | pattern_subn(PatternObject* self, PyObject* args) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1432 | { |
| 1433 | PyObject* template; |
| 1434 | PyObject* string; |
| 1435 | PyObject* count; |
| 1436 | if (!PyArg_ParseTuple(args, "OOO", &template, &string, &count)) |
| 1437 | return NULL; |
| 1438 | |
| 1439 | /* delegate to Python code */ |
| 1440 | return call("_subn", Py_BuildValue("OOOO", self, template, string, count)); |
| 1441 | } |
| 1442 | |
| 1443 | static PyObject* |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1444 | pattern_split(PatternObject* self, PyObject* args) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1445 | { |
| 1446 | PyObject* string; |
| 1447 | PyObject* maxsplit; |
| 1448 | if (!PyArg_ParseTuple(args, "OO", &string, &maxsplit)) |
| 1449 | return NULL; |
| 1450 | |
| 1451 | /* delegate to Python code */ |
| 1452 | return call("_split", Py_BuildValue("OOO", self, string, maxsplit)); |
| 1453 | } |
| 1454 | |
| 1455 | static PyObject* |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1456 | pattern_findall(PatternObject* self, PyObject* args) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1457 | { |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1458 | SRE_STATE state; |
| 1459 | PyObject* string; |
| 1460 | PyObject* list; |
| 1461 | int status; |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1462 | int i; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1463 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1464 | string = state_init(&state, self, args); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1465 | if (!string) |
| 1466 | return NULL; |
| 1467 | |
| 1468 | list = PyList_New(0); |
| 1469 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1470 | while (state.start <= state.end) { |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1471 | |
| 1472 | PyObject* item; |
| 1473 | |
| 1474 | state.ptr = state.start; |
| 1475 | |
| 1476 | if (state.charsize == 1) { |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1477 | status = sre_search(&state, PatternObject_GetCode(self)); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1478 | } else { |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1479 | #if defined(HAVE_UNICODE) |
| 1480 | status = sre_usearch(&state, PatternObject_GetCode(self)); |
| 1481 | #endif |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1482 | } |
| 1483 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1484 | if (status > 0) { |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1485 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1486 | /* don't bother to build a match object */ |
| 1487 | switch (self->groups) { |
| 1488 | case 0: |
| 1489 | item = PySequence_GetSlice( |
| 1490 | string, |
| 1491 | ((char*) state.start - (char*) state.beginning) / |
| 1492 | state.charsize, |
| 1493 | ((char*) state.ptr - (char*) state.beginning) / |
| 1494 | state.charsize); |
| 1495 | if (!item) |
| 1496 | goto error; |
| 1497 | break; |
| 1498 | case 1: |
| 1499 | item = state_getslice(&state, 1, string); |
| 1500 | if (!item) |
| 1501 | goto error; |
| 1502 | break; |
| 1503 | default: |
| 1504 | item = PyTuple_New(self->groups); |
| 1505 | if (!item) |
| 1506 | goto error; |
| 1507 | for (i = 0; i < self->groups; i++) { |
| 1508 | PyObject* o = state_getslice(&state, i+1, string); |
| 1509 | if (!o) { |
| 1510 | Py_DECREF(item); |
| 1511 | goto error; |
| 1512 | } |
| 1513 | PyTuple_SET_ITEM(item, i, o); |
| 1514 | } |
| 1515 | break; |
| 1516 | } |
| 1517 | |
| 1518 | if (PyList_Append(list, item) < 0) { |
| 1519 | Py_DECREF(item); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1520 | goto error; |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1521 | } |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1522 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1523 | if (state.ptr == state.start) |
| 1524 | state.start = (void*) ((char*) state.ptr + state.charsize); |
| 1525 | else |
| 1526 | state.start = state.ptr; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1527 | |
| 1528 | } else { |
| 1529 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1530 | if (status == 0) |
| 1531 | break; |
| 1532 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1533 | /* internal error */ |
| 1534 | PyErr_SetString( |
| 1535 | PyExc_RuntimeError, |
| 1536 | "internal error in regular expression engine" |
| 1537 | ); |
| 1538 | goto error; |
| 1539 | |
| 1540 | } |
| 1541 | } |
| 1542 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1543 | state_fini(&state); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1544 | return list; |
| 1545 | |
| 1546 | error: |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1547 | Py_DECREF(list); |
| 1548 | state_fini(&state); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1549 | return NULL; |
| 1550 | |
| 1551 | } |
| 1552 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1553 | static PyMethodDef pattern_methods[] = { |
| 1554 | {"match", (PyCFunction) pattern_match, 1}, |
| 1555 | {"search", (PyCFunction) pattern_search, 1}, |
| 1556 | {"sub", (PyCFunction) pattern_sub, 1}, |
| 1557 | {"subn", (PyCFunction) pattern_subn, 1}, |
| 1558 | {"split", (PyCFunction) pattern_split, 1}, |
| 1559 | {"findall", (PyCFunction) pattern_findall, 1}, |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1560 | /* experimental */ |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 1561 | {"scanner", (PyCFunction) pattern_scanner, 1}, |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1562 | {NULL, NULL} |
| 1563 | }; |
| 1564 | |
| 1565 | static PyObject* |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1566 | pattern_getattr(PatternObject* self, char* name) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1567 | { |
| 1568 | PyObject* res; |
| 1569 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1570 | res = Py_FindMethod(pattern_methods, (PyObject*) self, name); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1571 | |
| 1572 | if (res) |
| 1573 | return res; |
| 1574 | |
| 1575 | PyErr_Clear(); |
| 1576 | |
| 1577 | /* attributes */ |
| 1578 | if (!strcmp(name, "pattern")) { |
| 1579 | Py_INCREF(self->pattern); |
| 1580 | return self->pattern; |
| 1581 | } |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1582 | |
| 1583 | if (!strcmp(name, "flags")) |
| 1584 | return Py_BuildValue("i", self->flags); |
| 1585 | |
Fredrik Lundh | 01016fe | 2000-06-30 00:27:46 +0000 | [diff] [blame] | 1586 | if (!strcmp(name, "groups")) |
| 1587 | return Py_BuildValue("i", self->groups); |
| 1588 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1589 | if (!strcmp(name, "groupindex") && self->groupindex) { |
| 1590 | Py_INCREF(self->groupindex); |
| 1591 | return self->groupindex; |
| 1592 | } |
| 1593 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1594 | PyErr_SetString(PyExc_AttributeError, name); |
| 1595 | return NULL; |
| 1596 | } |
| 1597 | |
| 1598 | statichere PyTypeObject Pattern_Type = { |
| 1599 | PyObject_HEAD_INIT(NULL) |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 1600 | 0, "SRE_Pattern", sizeof(PatternObject), 0, |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1601 | (destructor)pattern_dealloc, /*tp_dealloc*/ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1602 | 0, /*tp_print*/ |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1603 | (getattrfunc)pattern_getattr, /*tp_getattr*/ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1604 | }; |
| 1605 | |
| 1606 | /* -------------------------------------------------------------------- */ |
| 1607 | /* match methods */ |
| 1608 | |
| 1609 | static void |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1610 | match_dealloc(MatchObject* self) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1611 | { |
| 1612 | Py_XDECREF(self->string); |
| 1613 | Py_DECREF(self->pattern); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1614 | PyMem_DEL(self); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1615 | } |
| 1616 | |
| 1617 | static PyObject* |
Fredrik Lundh | df02d0b | 2000-06-30 07:08:20 +0000 | [diff] [blame] | 1618 | match_getslice_by_index(MatchObject* self, int index, PyObject* def) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1619 | { |
| 1620 | if (index < 0 || index >= self->groups) { |
| 1621 | /* raise IndexError if we were given a bad group number */ |
| 1622 | PyErr_SetString( |
| 1623 | PyExc_IndexError, |
| 1624 | "no such group" |
| 1625 | ); |
| 1626 | return NULL; |
| 1627 | } |
| 1628 | |
| 1629 | if (self->string == Py_None || self->mark[index+index] < 0) { |
Fredrik Lundh | df02d0b | 2000-06-30 07:08:20 +0000 | [diff] [blame] | 1630 | /* return default value if the string or group is undefined */ |
| 1631 | Py_INCREF(def); |
| 1632 | return def; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1633 | } |
| 1634 | |
| 1635 | return PySequence_GetSlice( |
| 1636 | self->string, self->mark[index+index], self->mark[index+index+1] |
| 1637 | ); |
| 1638 | } |
| 1639 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1640 | static int |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1641 | match_getindex(MatchObject* self, PyObject* index) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1642 | { |
| 1643 | if (!PyInt_Check(index) && self->pattern->groupindex != NULL) { |
| 1644 | /* FIXME: resource leak? */ |
| 1645 | index = PyObject_GetItem(self->pattern->groupindex, index); |
| 1646 | if (!index) |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1647 | return -1; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1648 | } |
| 1649 | |
| 1650 | if (PyInt_Check(index)) |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1651 | return (int) PyInt_AS_LONG(index); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1652 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1653 | return -1; |
| 1654 | } |
| 1655 | |
| 1656 | static PyObject* |
Fredrik Lundh | df02d0b | 2000-06-30 07:08:20 +0000 | [diff] [blame] | 1657 | match_getslice(MatchObject* self, PyObject* index, PyObject* def) |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1658 | { |
Fredrik Lundh | df02d0b | 2000-06-30 07:08:20 +0000 | [diff] [blame] | 1659 | return match_getslice_by_index(self, match_getindex(self, index), def); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1660 | } |
| 1661 | |
| 1662 | static PyObject* |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1663 | match_group(MatchObject* self, PyObject* args) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1664 | { |
| 1665 | PyObject* result; |
| 1666 | int i, size; |
| 1667 | |
| 1668 | size = PyTuple_GET_SIZE(args); |
| 1669 | |
| 1670 | switch (size) { |
| 1671 | case 0: |
Fredrik Lundh | df02d0b | 2000-06-30 07:08:20 +0000 | [diff] [blame] | 1672 | result = match_getslice(self, Py_False, Py_None); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1673 | break; |
| 1674 | case 1: |
Fredrik Lundh | df02d0b | 2000-06-30 07:08:20 +0000 | [diff] [blame] | 1675 | result = match_getslice(self, PyTuple_GET_ITEM(args, 0), Py_None); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1676 | break; |
| 1677 | default: |
| 1678 | /* fetch multiple items */ |
| 1679 | result = PyTuple_New(size); |
| 1680 | if (!result) |
| 1681 | return NULL; |
| 1682 | for (i = 0; i < size; i++) { |
Fredrik Lundh | df02d0b | 2000-06-30 07:08:20 +0000 | [diff] [blame] | 1683 | PyObject* item = match_getslice( |
| 1684 | self, PyTuple_GET_ITEM(args, i), Py_None |
| 1685 | ); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1686 | if (!item) { |
| 1687 | Py_DECREF(result); |
| 1688 | return NULL; |
| 1689 | } |
| 1690 | PyTuple_SET_ITEM(result, i, item); |
| 1691 | } |
| 1692 | break; |
| 1693 | } |
| 1694 | return result; |
| 1695 | } |
| 1696 | |
| 1697 | static PyObject* |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1698 | match_groups(MatchObject* self, PyObject* args) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1699 | { |
| 1700 | PyObject* result; |
| 1701 | int index; |
| 1702 | |
Fredrik Lundh | df02d0b | 2000-06-30 07:08:20 +0000 | [diff] [blame] | 1703 | PyObject* def = Py_None; |
| 1704 | if (!PyArg_ParseTuple(args, "|O", &def)) |
| 1705 | return NULL; |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1706 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1707 | result = PyTuple_New(self->groups-1); |
| 1708 | if (!result) |
| 1709 | return NULL; |
| 1710 | |
| 1711 | for (index = 1; index < self->groups; index++) { |
| 1712 | PyObject* item; |
Fredrik Lundh | df02d0b | 2000-06-30 07:08:20 +0000 | [diff] [blame] | 1713 | item = match_getslice_by_index(self, index, def); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1714 | if (!item) { |
| 1715 | Py_DECREF(result); |
| 1716 | return NULL; |
| 1717 | } |
| 1718 | PyTuple_SET_ITEM(result, index-1, item); |
| 1719 | } |
| 1720 | |
| 1721 | return result; |
| 1722 | } |
| 1723 | |
| 1724 | static PyObject* |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1725 | match_groupdict(MatchObject* self, PyObject* args) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1726 | { |
| 1727 | PyObject* result; |
| 1728 | PyObject* keys; |
| 1729 | int index; |
| 1730 | |
Fredrik Lundh | df02d0b | 2000-06-30 07:08:20 +0000 | [diff] [blame] | 1731 | PyObject* def = Py_None; |
| 1732 | if (!PyArg_ParseTuple(args, "|O", &def)) |
| 1733 | return NULL; |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1734 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1735 | result = PyDict_New(); |
Fredrik Lundh | df02d0b | 2000-06-30 07:08:20 +0000 | [diff] [blame] | 1736 | if (!result || !self->pattern->groupindex) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1737 | return result; |
| 1738 | |
| 1739 | keys = PyMapping_Keys(self->pattern->groupindex); |
Fredrik Lundh | df02d0b | 2000-06-30 07:08:20 +0000 | [diff] [blame] | 1740 | if (!keys) { |
| 1741 | Py_DECREF(result); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1742 | return NULL; |
Fredrik Lundh | df02d0b | 2000-06-30 07:08:20 +0000 | [diff] [blame] | 1743 | } |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1744 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1745 | for (index = 0; index < PyList_GET_SIZE(keys); index++) { |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1746 | PyObject* key; |
| 1747 | PyObject* item; |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1748 | key = PyList_GET_ITEM(keys, index); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1749 | if (!key) { |
| 1750 | Py_DECREF(keys); |
| 1751 | Py_DECREF(result); |
| 1752 | return NULL; |
| 1753 | } |
Fredrik Lundh | df02d0b | 2000-06-30 07:08:20 +0000 | [diff] [blame] | 1754 | item = match_getslice(self, key, def); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1755 | if (!item) { |
| 1756 | Py_DECREF(key); |
| 1757 | Py_DECREF(keys); |
| 1758 | Py_DECREF(result); |
| 1759 | return NULL; |
| 1760 | } |
| 1761 | /* FIXME: <fl> this can fail, right? */ |
| 1762 | PyDict_SetItem(result, key, item); |
| 1763 | } |
| 1764 | |
| 1765 | Py_DECREF(keys); |
| 1766 | |
| 1767 | return result; |
| 1768 | } |
| 1769 | |
| 1770 | static PyObject* |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1771 | match_start(MatchObject* self, PyObject* args) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1772 | { |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1773 | int index; |
| 1774 | |
| 1775 | PyObject* index_ = Py_False; |
| 1776 | if (!PyArg_ParseTuple(args, "|O", &index_)) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1777 | return NULL; |
| 1778 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1779 | index = match_getindex(self, index_); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1780 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1781 | if (index < 0 || index >= self->groups) { |
| 1782 | PyErr_SetString( |
| 1783 | PyExc_IndexError, |
| 1784 | "no such group" |
| 1785 | ); |
| 1786 | return NULL; |
| 1787 | } |
| 1788 | |
| 1789 | if (self->mark[index*2] < 0) { |
| 1790 | Py_INCREF(Py_None); |
| 1791 | return Py_None; |
| 1792 | } |
| 1793 | |
| 1794 | return Py_BuildValue("i", self->mark[index*2]); |
| 1795 | } |
| 1796 | |
| 1797 | static PyObject* |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1798 | match_end(MatchObject* self, PyObject* args) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1799 | { |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1800 | int index; |
| 1801 | |
| 1802 | PyObject* index_ = Py_False; |
| 1803 | if (!PyArg_ParseTuple(args, "|O", &index_)) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1804 | return NULL; |
| 1805 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1806 | index = match_getindex(self, index_); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1807 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1808 | if (index < 0 || index >= self->groups) { |
| 1809 | PyErr_SetString( |
| 1810 | PyExc_IndexError, |
| 1811 | "no such group" |
| 1812 | ); |
| 1813 | return NULL; |
| 1814 | } |
| 1815 | |
| 1816 | if (self->mark[index*2] < 0) { |
| 1817 | Py_INCREF(Py_None); |
| 1818 | return Py_None; |
| 1819 | } |
| 1820 | |
| 1821 | return Py_BuildValue("i", self->mark[index*2+1]); |
| 1822 | } |
| 1823 | |
| 1824 | static PyObject* |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1825 | match_span(MatchObject* self, PyObject* args) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1826 | { |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1827 | int index; |
| 1828 | |
| 1829 | PyObject* index_ = Py_False; |
| 1830 | if (!PyArg_ParseTuple(args, "|O", &index_)) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1831 | return NULL; |
| 1832 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1833 | index = match_getindex(self, index_); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1834 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1835 | if (index < 0 || index >= self->groups) { |
| 1836 | PyErr_SetString( |
| 1837 | PyExc_IndexError, |
| 1838 | "no such group" |
| 1839 | ); |
| 1840 | return NULL; |
| 1841 | } |
| 1842 | |
| 1843 | if (self->mark[index*2] < 0) { |
| 1844 | Py_INCREF(Py_None); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1845 | Py_INCREF(Py_None); |
| 1846 | return Py_BuildValue("OO", Py_None, Py_None); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1847 | } |
| 1848 | |
| 1849 | return Py_BuildValue("ii", self->mark[index*2], self->mark[index*2+1]); |
| 1850 | } |
| 1851 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1852 | static PyMethodDef match_methods[] = { |
| 1853 | {"group", (PyCFunction) match_group, 1}, |
| 1854 | {"start", (PyCFunction) match_start, 1}, |
| 1855 | {"end", (PyCFunction) match_end, 1}, |
| 1856 | {"span", (PyCFunction) match_span, 1}, |
| 1857 | {"groups", (PyCFunction) match_groups, 1}, |
| 1858 | {"groupdict", (PyCFunction) match_groupdict, 1}, |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1859 | {NULL, NULL} |
| 1860 | }; |
| 1861 | |
| 1862 | static PyObject* |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1863 | match_getattr(MatchObject* self, char* name) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1864 | { |
| 1865 | PyObject* res; |
| 1866 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1867 | res = Py_FindMethod(match_methods, (PyObject*) self, name); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1868 | if (res) |
| 1869 | return res; |
| 1870 | |
| 1871 | PyErr_Clear(); |
| 1872 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1873 | /* attributes */ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1874 | if (!strcmp(name, "string")) { |
| 1875 | Py_INCREF(self->string); |
| 1876 | return self->string; |
| 1877 | } |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1878 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1879 | if (!strcmp(name, "re")) { |
| 1880 | Py_INCREF(self->pattern); |
| 1881 | return (PyObject*) self->pattern; |
| 1882 | } |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1883 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1884 | if (!strcmp(name, "pos")) |
| 1885 | return Py_BuildValue("i", 0); /* FIXME */ |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1886 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1887 | if (!strcmp(name, "endpos")) |
| 1888 | return Py_BuildValue("i", 0); /* FIXME */ |
| 1889 | |
| 1890 | PyErr_SetString(PyExc_AttributeError, name); |
| 1891 | return NULL; |
| 1892 | } |
| 1893 | |
| 1894 | /* FIXME: implement setattr("string", None) as a special case (to |
| 1895 | detach the associated string, if any */ |
| 1896 | |
| 1897 | statichere PyTypeObject Match_Type = { |
| 1898 | PyObject_HEAD_INIT(NULL) |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 1899 | 0, "SRE_Match", |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1900 | sizeof(MatchObject), /* size of basic object */ |
| 1901 | sizeof(int), /* space for group item */ |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1902 | (destructor)match_dealloc, /*tp_dealloc*/ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1903 | 0, /*tp_print*/ |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1904 | (getattrfunc)match_getattr, /*tp_getattr*/ |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 1905 | }; |
| 1906 | |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1907 | /* -------------------------------------------------------------------- */ |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 1908 | /* scanner methods (experimental) */ |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1909 | |
| 1910 | static void |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 1911 | scanner_dealloc(ScannerObject* self) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1912 | { |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1913 | state_fini(&self->state); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1914 | Py_DECREF(self->string); |
| 1915 | Py_DECREF(self->pattern); |
| 1916 | PyMem_DEL(self); |
| 1917 | } |
| 1918 | |
| 1919 | static PyObject* |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 1920 | scanner_match(ScannerObject* self, PyObject* args) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1921 | { |
| 1922 | SRE_STATE* state = &self->state; |
| 1923 | PyObject* match; |
| 1924 | int status; |
| 1925 | |
| 1926 | state->ptr = state->start; |
| 1927 | |
| 1928 | if (state->charsize == 1) { |
| 1929 | status = sre_match(state, PatternObject_GetCode(self->pattern)); |
| 1930 | } else { |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1931 | #if defined(HAVE_UNICODE) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1932 | status = sre_umatch(state, PatternObject_GetCode(self->pattern)); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1933 | #endif |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1934 | } |
| 1935 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1936 | match = pattern_new_match((PatternObject*) self->pattern, |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1937 | state, self->string, status); |
| 1938 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1939 | if (status == 0 || state->ptr == state->start) |
| 1940 | state->start = (void*) ((char*) state->ptr + state->charsize); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1941 | else |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1942 | state->start = state->ptr; |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1943 | |
| 1944 | return match; |
| 1945 | } |
| 1946 | |
| 1947 | |
| 1948 | static PyObject* |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 1949 | scanner_search(ScannerObject* self, PyObject* args) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1950 | { |
| 1951 | SRE_STATE* state = &self->state; |
| 1952 | PyObject* match; |
| 1953 | int status; |
| 1954 | |
| 1955 | state->ptr = state->start; |
| 1956 | |
| 1957 | if (state->charsize == 1) { |
| 1958 | status = sre_search(state, PatternObject_GetCode(self->pattern)); |
| 1959 | } else { |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1960 | #if defined(HAVE_UNICODE) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1961 | status = sre_usearch(state, PatternObject_GetCode(self->pattern)); |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 1962 | #endif |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1963 | } |
| 1964 | |
Fredrik Lundh | 75f2d67 | 2000-06-29 11:34:28 +0000 | [diff] [blame] | 1965 | match = pattern_new_match((PatternObject*) self->pattern, |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1966 | state, self->string, status); |
| 1967 | |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 1968 | if (status == 0 || state->ptr == state->start) |
| 1969 | state->start = (void*) ((char*) state->ptr + state->charsize); |
| 1970 | else |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1971 | state->start = state->ptr; |
| 1972 | |
| 1973 | return match; |
| 1974 | } |
| 1975 | |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 1976 | static PyMethodDef scanner_methods[] = { |
| 1977 | {"match", (PyCFunction) scanner_match, 0}, |
| 1978 | {"search", (PyCFunction) scanner_search, 0}, |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1979 | {NULL, NULL} |
| 1980 | }; |
| 1981 | |
| 1982 | static PyObject* |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 1983 | scanner_getattr(ScannerObject* self, char* name) |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1984 | { |
| 1985 | PyObject* res; |
| 1986 | |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 1987 | res = Py_FindMethod(scanner_methods, (PyObject*) self, name); |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 1988 | if (res) |
| 1989 | return res; |
| 1990 | |
| 1991 | PyErr_Clear(); |
| 1992 | |
| 1993 | /* attributes */ |
| 1994 | if (!strcmp(name, "pattern")) { |
| 1995 | Py_INCREF(self->pattern); |
| 1996 | return self->pattern; |
| 1997 | } |
| 1998 | |
| 1999 | PyErr_SetString(PyExc_AttributeError, name); |
| 2000 | return NULL; |
| 2001 | } |
| 2002 | |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 2003 | statichere PyTypeObject Scanner_Type = { |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 2004 | PyObject_HEAD_INIT(NULL) |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 2005 | 0, "SRE_Scanner", |
| 2006 | sizeof(ScannerObject), /* size of basic object */ |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 2007 | 0, |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 2008 | (destructor)scanner_dealloc, /*tp_dealloc*/ |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 2009 | 0, /*tp_print*/ |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 2010 | (getattrfunc)scanner_getattr, /*tp_getattr*/ |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 2011 | }; |
| 2012 | |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 2013 | static PyMethodDef _functions[] = { |
| 2014 | {"compile", _compile, 1}, |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 2015 | {"getcodesize", sre_codesize, 1}, |
Fredrik Lundh | b389df3 | 2000-06-29 12:48:37 +0000 | [diff] [blame] | 2016 | {"getlower", sre_getlower, 1}, |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 2017 | {NULL, NULL} |
| 2018 | }; |
| 2019 | |
| 2020 | void |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 2021 | #if defined(WIN32) |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 2022 | __declspec(dllexport) |
| 2023 | #endif |
| 2024 | init_sre() |
| 2025 | { |
| 2026 | /* Patch object types */ |
Jeremy Hylton | b1aa195 | 2000-06-01 17:39:12 +0000 | [diff] [blame] | 2027 | Pattern_Type.ob_type = Match_Type.ob_type = |
Fredrik Lundh | be2211e | 2000-06-29 16:57:40 +0000 | [diff] [blame] | 2028 | Scanner_Type.ob_type = &PyType_Type; |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 2029 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 2030 | Py_InitModule("_" MODULE, _functions); |
Guido van Rossum | b700df9 | 2000-03-31 14:59:30 +0000 | [diff] [blame] | 2031 | } |
| 2032 | |
Fredrik Lundh | 436c3d58 | 2000-06-29 08:58:44 +0000 | [diff] [blame] | 2033 | #endif /* !defined(SRE_RECURSIVE) */ |