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