ricow@chromium.org | ddd545c | 2011-08-24 12:02:41 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | // A simple interpreter for the Irregexp byte code. |
| 29 | |
| 30 | |
| 31 | #include "v8.h" |
| 32 | #include "unicode.h" |
| 33 | #include "utils.h" |
| 34 | #include "ast.h" |
| 35 | #include "bytecodes-irregexp.h" |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 36 | #include "jsregexp.h" |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 37 | #include "interpreter-irregexp.h" |
| 38 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 39 | namespace v8 { |
| 40 | namespace internal { |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 41 | |
| 42 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 43 | typedef unibrow::Mapping<unibrow::Ecma262Canonicalize> Canonicalize; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 44 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 45 | static bool BackRefMatchesNoCase(Canonicalize* interp_canonicalize, |
| 46 | int from, |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 47 | int current, |
| 48 | int len, |
| 49 | Vector<const uc16> subject) { |
| 50 | for (int i = 0; i < len; i++) { |
| 51 | unibrow::uchar old_char = subject[from++]; |
| 52 | unibrow::uchar new_char = subject[current++]; |
| 53 | if (old_char == new_char) continue; |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 54 | unibrow::uchar old_string[1] = { old_char }; |
| 55 | unibrow::uchar new_string[1] = { new_char }; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 56 | interp_canonicalize->get(old_char, '\0', old_string); |
| 57 | interp_canonicalize->get(new_char, '\0', new_string); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 58 | if (old_string[0] != new_string[0]) { |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 59 | return false; |
| 60 | } |
| 61 | } |
| 62 | return true; |
| 63 | } |
| 64 | |
| 65 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 66 | static bool BackRefMatchesNoCase(Canonicalize* interp_canonicalize, |
| 67 | int from, |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 68 | int current, |
| 69 | int len, |
| 70 | Vector<const char> subject) { |
| 71 | for (int i = 0; i < len; i++) { |
| 72 | unsigned int old_char = subject[from++]; |
| 73 | unsigned int new_char = subject[current++]; |
| 74 | if (old_char == new_char) continue; |
| 75 | if (old_char - 'A' <= 'Z' - 'A') old_char |= 0x20; |
| 76 | if (new_char - 'A' <= 'Z' - 'A') new_char |= 0x20; |
| 77 | if (old_char != new_char) return false; |
| 78 | } |
| 79 | return true; |
| 80 | } |
| 81 | |
| 82 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 83 | #ifdef DEBUG |
| 84 | static void TraceInterpreter(const byte* code_base, |
| 85 | const byte* pc, |
| 86 | int stack_depth, |
| 87 | int current_position, |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 88 | uint32_t current_char, |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 89 | int bytecode_length, |
| 90 | const char* bytecode_name) { |
| 91 | if (FLAG_trace_regexp_bytecodes) { |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 92 | bool printable = (current_char < 127 && current_char >= 32); |
| 93 | const char* format = |
| 94 | printable ? |
| 95 | "pc = %02x, sp = %d, curpos = %d, curchar = %08x (%c), bc = %s" : |
| 96 | "pc = %02x, sp = %d, curpos = %d, curchar = %08x .%c., bc = %s"; |
| 97 | PrintF(format, |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 98 | pc - code_base, |
| 99 | stack_depth, |
| 100 | current_position, |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 101 | current_char, |
| 102 | printable ? current_char : '.', |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 103 | bytecode_name); |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 104 | for (int i = 0; i < bytecode_length; i++) { |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 105 | printf(", %02x", pc[i]); |
| 106 | } |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 107 | printf(" "); |
| 108 | for (int i = 1; i < bytecode_length; i++) { |
| 109 | unsigned char b = pc[i]; |
| 110 | if (b < 127 && b >= 32) { |
| 111 | printf("%c", b); |
| 112 | } else { |
| 113 | printf("."); |
| 114 | } |
| 115 | } |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 116 | printf("\n"); |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 121 | #define BYTECODE(name) \ |
| 122 | case BC_##name: \ |
| 123 | TraceInterpreter(code_base, \ |
| 124 | pc, \ |
| 125 | static_cast<int>(backtrack_sp - backtrack_stack_base), \ |
| 126 | current, \ |
| 127 | current_char, \ |
| 128 | BC_##name##_LENGTH, \ |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 129 | #name); |
| 130 | #else |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 131 | #define BYTECODE(name) \ |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 132 | case BC_##name: |
| 133 | #endif |
| 134 | |
| 135 | |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 136 | static int32_t Load32Aligned(const byte* pc) { |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 137 | ASSERT((reinterpret_cast<intptr_t>(pc) & 3) == 0); |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 138 | return *reinterpret_cast<const int32_t *>(pc); |
| 139 | } |
| 140 | |
| 141 | |
| 142 | static int32_t Load16Aligned(const byte* pc) { |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 143 | ASSERT((reinterpret_cast<intptr_t>(pc) & 1) == 0); |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 144 | return *reinterpret_cast<const uint16_t *>(pc); |
| 145 | } |
| 146 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 147 | |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 148 | // A simple abstraction over the backtracking stack used by the interpreter. |
| 149 | // This backtracking stack does not grow automatically, but it ensures that the |
| 150 | // the memory held by the stack is released or remembered in a cache if the |
| 151 | // matching terminates. |
| 152 | class BacktrackStack { |
| 153 | public: |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 154 | explicit BacktrackStack(Isolate* isolate) : isolate_(isolate) { |
| 155 | if (isolate->irregexp_interpreter_backtrack_stack_cache() != NULL) { |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 156 | // If the cache is not empty reuse the previously allocated stack. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 157 | data_ = isolate->irregexp_interpreter_backtrack_stack_cache(); |
| 158 | isolate->set_irregexp_interpreter_backtrack_stack_cache(NULL); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 159 | } else { |
| 160 | // Cache was empty. Allocate a new backtrack stack. |
| 161 | data_ = NewArray<int>(kBacktrackStackSize); |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | ~BacktrackStack() { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 166 | if (isolate_->irregexp_interpreter_backtrack_stack_cache() == NULL) { |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 167 | // The cache is empty. Keep this backtrack stack around. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 168 | isolate_->set_irregexp_interpreter_backtrack_stack_cache(data_); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 169 | } else { |
| 170 | // A backtrack stack was already cached, just release this one. |
| 171 | DeleteArray(data_); |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | int* data() const { return data_; } |
| 176 | |
| 177 | int max_size() const { return kBacktrackStackSize; } |
| 178 | |
| 179 | private: |
| 180 | static const int kBacktrackStackSize = 10000; |
| 181 | |
| 182 | int* data_; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 183 | Isolate* isolate_; |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 184 | |
| 185 | DISALLOW_COPY_AND_ASSIGN(BacktrackStack); |
| 186 | }; |
| 187 | |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 188 | |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 189 | template <typename Char> |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 190 | static RegExpImpl::IrregexpResult RawMatch(Isolate* isolate, |
| 191 | const byte* code_base, |
| 192 | Vector<const Char> subject, |
| 193 | int* registers, |
| 194 | int current, |
| 195 | uint32_t current_char) { |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 196 | const byte* pc = code_base; |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 197 | // BacktrackStack ensures that the memory allocated for the backtracking stack |
| 198 | // is returned to the system or cached if there is no stack being cached at |
| 199 | // the moment. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 200 | BacktrackStack backtrack_stack(isolate); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 201 | int* backtrack_stack_base = backtrack_stack.data(); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 202 | int* backtrack_sp = backtrack_stack_base; |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 203 | int backtrack_stack_space = backtrack_stack.max_size(); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 204 | #ifdef DEBUG |
| 205 | if (FLAG_trace_regexp_bytecodes) { |
| 206 | PrintF("\n\nStart bytecode interpreter\n\n"); |
| 207 | } |
| 208 | #endif |
| 209 | while (true) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 210 | int32_t insn = Load32Aligned(pc); |
| 211 | switch (insn & BYTECODE_MASK) { |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 212 | BYTECODE(BREAK) |
| 213 | UNREACHABLE(); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 214 | return RegExpImpl::RE_FAILURE; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 215 | BYTECODE(PUSH_CP) |
| 216 | if (--backtrack_stack_space < 0) { |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 217 | return RegExpImpl::RE_EXCEPTION; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 218 | } |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 219 | *backtrack_sp++ = current; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 220 | pc += BC_PUSH_CP_LENGTH; |
| 221 | break; |
| 222 | BYTECODE(PUSH_BT) |
| 223 | if (--backtrack_stack_space < 0) { |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 224 | return RegExpImpl::RE_EXCEPTION; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 225 | } |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 226 | *backtrack_sp++ = Load32Aligned(pc + 4); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 227 | pc += BC_PUSH_BT_LENGTH; |
| 228 | break; |
| 229 | BYTECODE(PUSH_REGISTER) |
| 230 | if (--backtrack_stack_space < 0) { |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 231 | return RegExpImpl::RE_EXCEPTION; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 232 | } |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 233 | *backtrack_sp++ = registers[insn >> BYTECODE_SHIFT]; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 234 | pc += BC_PUSH_REGISTER_LENGTH; |
| 235 | break; |
| 236 | BYTECODE(SET_REGISTER) |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 237 | registers[insn >> BYTECODE_SHIFT] = Load32Aligned(pc + 4); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 238 | pc += BC_SET_REGISTER_LENGTH; |
| 239 | break; |
| 240 | BYTECODE(ADVANCE_REGISTER) |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 241 | registers[insn >> BYTECODE_SHIFT] += Load32Aligned(pc + 4); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 242 | pc += BC_ADVANCE_REGISTER_LENGTH; |
| 243 | break; |
| 244 | BYTECODE(SET_REGISTER_TO_CP) |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 245 | registers[insn >> BYTECODE_SHIFT] = current + Load32Aligned(pc + 4); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 246 | pc += BC_SET_REGISTER_TO_CP_LENGTH; |
| 247 | break; |
| 248 | BYTECODE(SET_CP_TO_REGISTER) |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 249 | current = registers[insn >> BYTECODE_SHIFT]; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 250 | pc += BC_SET_CP_TO_REGISTER_LENGTH; |
| 251 | break; |
| 252 | BYTECODE(SET_REGISTER_TO_SP) |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 253 | registers[insn >> BYTECODE_SHIFT] = |
| 254 | static_cast<int>(backtrack_sp - backtrack_stack_base); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 255 | pc += BC_SET_REGISTER_TO_SP_LENGTH; |
| 256 | break; |
| 257 | BYTECODE(SET_SP_TO_REGISTER) |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 258 | backtrack_sp = backtrack_stack_base + registers[insn >> BYTECODE_SHIFT]; |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 259 | backtrack_stack_space = backtrack_stack.max_size() - |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 260 | static_cast<int>(backtrack_sp - backtrack_stack_base); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 261 | pc += BC_SET_SP_TO_REGISTER_LENGTH; |
| 262 | break; |
| 263 | BYTECODE(POP_CP) |
| 264 | backtrack_stack_space++; |
| 265 | --backtrack_sp; |
| 266 | current = *backtrack_sp; |
| 267 | pc += BC_POP_CP_LENGTH; |
| 268 | break; |
| 269 | BYTECODE(POP_BT) |
| 270 | backtrack_stack_space++; |
| 271 | --backtrack_sp; |
| 272 | pc = code_base + *backtrack_sp; |
| 273 | break; |
| 274 | BYTECODE(POP_REGISTER) |
| 275 | backtrack_stack_space++; |
| 276 | --backtrack_sp; |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 277 | registers[insn >> BYTECODE_SHIFT] = *backtrack_sp; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 278 | pc += BC_POP_REGISTER_LENGTH; |
| 279 | break; |
| 280 | BYTECODE(FAIL) |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 281 | return RegExpImpl::RE_FAILURE; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 282 | BYTECODE(SUCCEED) |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 283 | return RegExpImpl::RE_SUCCESS; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 284 | BYTECODE(ADVANCE_CP) |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 285 | current += insn >> BYTECODE_SHIFT; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 286 | pc += BC_ADVANCE_CP_LENGTH; |
| 287 | break; |
| 288 | BYTECODE(GOTO) |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 289 | pc = code_base + Load32Aligned(pc + 4); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 290 | break; |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 291 | BYTECODE(ADVANCE_CP_AND_GOTO) |
| 292 | current += insn >> BYTECODE_SHIFT; |
| 293 | pc = code_base + Load32Aligned(pc + 4); |
| 294 | break; |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 295 | BYTECODE(CHECK_GREEDY) |
| 296 | if (current == backtrack_sp[-1]) { |
| 297 | backtrack_sp--; |
| 298 | backtrack_stack_space++; |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 299 | pc = code_base + Load32Aligned(pc + 4); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 300 | } else { |
| 301 | pc += BC_CHECK_GREEDY_LENGTH; |
| 302 | } |
| 303 | break; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 304 | BYTECODE(LOAD_CURRENT_CHAR) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 305 | int pos = current + (insn >> BYTECODE_SHIFT); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 306 | if (pos >= subject.length()) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 307 | pc = code_base + Load32Aligned(pc + 4); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 308 | } else { |
| 309 | current_char = subject[pos]; |
| 310 | pc += BC_LOAD_CURRENT_CHAR_LENGTH; |
| 311 | } |
| 312 | break; |
| 313 | } |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 314 | BYTECODE(LOAD_CURRENT_CHAR_UNCHECKED) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 315 | int pos = current + (insn >> BYTECODE_SHIFT); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 316 | current_char = subject[pos]; |
| 317 | pc += BC_LOAD_CURRENT_CHAR_UNCHECKED_LENGTH; |
| 318 | break; |
| 319 | } |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 320 | BYTECODE(LOAD_2_CURRENT_CHARS) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 321 | int pos = current + (insn >> BYTECODE_SHIFT); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 322 | if (pos + 2 > subject.length()) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 323 | pc = code_base + Load32Aligned(pc + 4); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 324 | } else { |
| 325 | Char next = subject[pos + 1]; |
| 326 | current_char = |
| 327 | (subject[pos] | (next << (kBitsPerByte * sizeof(Char)))); |
| 328 | pc += BC_LOAD_2_CURRENT_CHARS_LENGTH; |
| 329 | } |
| 330 | break; |
| 331 | } |
| 332 | BYTECODE(LOAD_2_CURRENT_CHARS_UNCHECKED) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 333 | int pos = current + (insn >> BYTECODE_SHIFT); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 334 | Char next = subject[pos + 1]; |
| 335 | current_char = (subject[pos] | (next << (kBitsPerByte * sizeof(Char)))); |
| 336 | pc += BC_LOAD_2_CURRENT_CHARS_UNCHECKED_LENGTH; |
| 337 | break; |
| 338 | } |
| 339 | BYTECODE(LOAD_4_CURRENT_CHARS) { |
| 340 | ASSERT(sizeof(Char) == 1); |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 341 | int pos = current + (insn >> BYTECODE_SHIFT); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 342 | if (pos + 4 > subject.length()) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 343 | pc = code_base + Load32Aligned(pc + 4); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 344 | } else { |
| 345 | Char next1 = subject[pos + 1]; |
| 346 | Char next2 = subject[pos + 2]; |
| 347 | Char next3 = subject[pos + 3]; |
| 348 | current_char = (subject[pos] | |
| 349 | (next1 << 8) | |
| 350 | (next2 << 16) | |
| 351 | (next3 << 24)); |
| 352 | pc += BC_LOAD_4_CURRENT_CHARS_LENGTH; |
| 353 | } |
| 354 | break; |
| 355 | } |
| 356 | BYTECODE(LOAD_4_CURRENT_CHARS_UNCHECKED) { |
| 357 | ASSERT(sizeof(Char) == 1); |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 358 | int pos = current + (insn >> BYTECODE_SHIFT); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 359 | Char next1 = subject[pos + 1]; |
| 360 | Char next2 = subject[pos + 2]; |
| 361 | Char next3 = subject[pos + 3]; |
| 362 | current_char = (subject[pos] | |
| 363 | (next1 << 8) | |
| 364 | (next2 << 16) | |
| 365 | (next3 << 24)); |
| 366 | pc += BC_LOAD_4_CURRENT_CHARS_UNCHECKED_LENGTH; |
| 367 | break; |
| 368 | } |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 369 | BYTECODE(CHECK_4_CHARS) { |
| 370 | uint32_t c = Load32Aligned(pc + 4); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 371 | if (c == current_char) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 372 | pc = code_base + Load32Aligned(pc + 8); |
| 373 | } else { |
| 374 | pc += BC_CHECK_4_CHARS_LENGTH; |
| 375 | } |
| 376 | break; |
| 377 | } |
| 378 | BYTECODE(CHECK_CHAR) { |
| 379 | uint32_t c = (insn >> BYTECODE_SHIFT); |
| 380 | if (c == current_char) { |
| 381 | pc = code_base + Load32Aligned(pc + 4); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 382 | } else { |
| 383 | pc += BC_CHECK_CHAR_LENGTH; |
| 384 | } |
| 385 | break; |
| 386 | } |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 387 | BYTECODE(CHECK_NOT_4_CHARS) { |
| 388 | uint32_t c = Load32Aligned(pc + 4); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 389 | if (c != current_char) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 390 | pc = code_base + Load32Aligned(pc + 8); |
| 391 | } else { |
| 392 | pc += BC_CHECK_NOT_4_CHARS_LENGTH; |
| 393 | } |
| 394 | break; |
| 395 | } |
| 396 | BYTECODE(CHECK_NOT_CHAR) { |
| 397 | uint32_t c = (insn >> BYTECODE_SHIFT); |
| 398 | if (c != current_char) { |
| 399 | pc = code_base + Load32Aligned(pc + 4); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 400 | } else { |
| 401 | pc += BC_CHECK_NOT_CHAR_LENGTH; |
| 402 | } |
| 403 | break; |
| 404 | } |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 405 | BYTECODE(AND_CHECK_4_CHARS) { |
| 406 | uint32_t c = Load32Aligned(pc + 4); |
| 407 | if (c == (current_char & Load32Aligned(pc + 8))) { |
| 408 | pc = code_base + Load32Aligned(pc + 12); |
| 409 | } else { |
| 410 | pc += BC_AND_CHECK_4_CHARS_LENGTH; |
| 411 | } |
| 412 | break; |
| 413 | } |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 414 | BYTECODE(AND_CHECK_CHAR) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 415 | uint32_t c = (insn >> BYTECODE_SHIFT); |
| 416 | if (c == (current_char & Load32Aligned(pc + 4))) { |
| 417 | pc = code_base + Load32Aligned(pc + 8); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 418 | } else { |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 419 | pc += BC_AND_CHECK_CHAR_LENGTH; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 420 | } |
| 421 | break; |
| 422 | } |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 423 | BYTECODE(AND_CHECK_NOT_4_CHARS) { |
| 424 | uint32_t c = Load32Aligned(pc + 4); |
| 425 | if (c != (current_char & Load32Aligned(pc + 8))) { |
| 426 | pc = code_base + Load32Aligned(pc + 12); |
| 427 | } else { |
| 428 | pc += BC_AND_CHECK_NOT_4_CHARS_LENGTH; |
| 429 | } |
| 430 | break; |
| 431 | } |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 432 | BYTECODE(AND_CHECK_NOT_CHAR) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 433 | uint32_t c = (insn >> BYTECODE_SHIFT); |
| 434 | if (c != (current_char & Load32Aligned(pc + 4))) { |
| 435 | pc = code_base + Load32Aligned(pc + 8); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 436 | } else { |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 437 | pc += BC_AND_CHECK_NOT_CHAR_LENGTH; |
| 438 | } |
| 439 | break; |
| 440 | } |
| 441 | BYTECODE(MINUS_AND_CHECK_NOT_CHAR) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 442 | uint32_t c = (insn >> BYTECODE_SHIFT); |
| 443 | uint32_t minus = Load16Aligned(pc + 4); |
| 444 | uint32_t mask = Load16Aligned(pc + 6); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 445 | if (c != ((current_char - minus) & mask)) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 446 | pc = code_base + Load32Aligned(pc + 8); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 447 | } else { |
| 448 | pc += BC_MINUS_AND_CHECK_NOT_CHAR_LENGTH; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 449 | } |
| 450 | break; |
| 451 | } |
| 452 | BYTECODE(CHECK_LT) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 453 | uint32_t limit = (insn >> BYTECODE_SHIFT); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 454 | if (current_char < limit) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 455 | pc = code_base + Load32Aligned(pc + 4); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 456 | } else { |
| 457 | pc += BC_CHECK_LT_LENGTH; |
| 458 | } |
| 459 | break; |
| 460 | } |
| 461 | BYTECODE(CHECK_GT) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 462 | uint32_t limit = (insn >> BYTECODE_SHIFT); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 463 | if (current_char > limit) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 464 | pc = code_base + Load32Aligned(pc + 4); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 465 | } else { |
| 466 | pc += BC_CHECK_GT_LENGTH; |
| 467 | } |
| 468 | break; |
| 469 | } |
| 470 | BYTECODE(CHECK_REGISTER_LT) |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 471 | if (registers[insn >> BYTECODE_SHIFT] < Load32Aligned(pc + 4)) { |
| 472 | pc = code_base + Load32Aligned(pc + 8); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 473 | } else { |
| 474 | pc += BC_CHECK_REGISTER_LT_LENGTH; |
| 475 | } |
| 476 | break; |
| 477 | BYTECODE(CHECK_REGISTER_GE) |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 478 | if (registers[insn >> BYTECODE_SHIFT] >= Load32Aligned(pc + 4)) { |
| 479 | pc = code_base + Load32Aligned(pc + 8); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 480 | } else { |
| 481 | pc += BC_CHECK_REGISTER_GE_LENGTH; |
| 482 | } |
| 483 | break; |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 484 | BYTECODE(CHECK_REGISTER_EQ_POS) |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 485 | if (registers[insn >> BYTECODE_SHIFT] == current) { |
| 486 | pc = code_base + Load32Aligned(pc + 4); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 487 | } else { |
| 488 | pc += BC_CHECK_REGISTER_EQ_POS_LENGTH; |
| 489 | } |
| 490 | break; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 491 | BYTECODE(LOOKUP_MAP1) { |
| 492 | // Look up character in a bitmap. If we find a 0, then jump to the |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 493 | // location at pc + 8. Otherwise fall through! |
| 494 | int index = current_char - (insn >> BYTECODE_SHIFT); |
| 495 | byte map = code_base[Load32Aligned(pc + 4) + (index >> 3)]; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 496 | map = ((map >> (index & 7)) & 1); |
| 497 | if (map == 0) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 498 | pc = code_base + Load32Aligned(pc + 8); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 499 | } else { |
| 500 | pc += BC_LOOKUP_MAP1_LENGTH; |
| 501 | } |
| 502 | break; |
| 503 | } |
| 504 | BYTECODE(LOOKUP_MAP2) { |
| 505 | // Look up character in a half-nibble map. If we find 00, then jump to |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 506 | // the location at pc + 8. If we find 01 then jump to location at |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 507 | // pc + 11, etc. |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 508 | int index = (current_char - (insn >> BYTECODE_SHIFT)) << 1; |
| 509 | byte map = code_base[Load32Aligned(pc + 3) + (index >> 3)]; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 510 | map = ((map >> (index & 7)) & 3); |
| 511 | if (map < 2) { |
| 512 | if (map == 0) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 513 | pc = code_base + Load32Aligned(pc + 8); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 514 | } else { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 515 | pc = code_base + Load32Aligned(pc + 12); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 516 | } |
| 517 | } else { |
| 518 | if (map == 2) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 519 | pc = code_base + Load32Aligned(pc + 16); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 520 | } else { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 521 | pc = code_base + Load32Aligned(pc + 20); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 522 | } |
| 523 | } |
| 524 | break; |
| 525 | } |
| 526 | BYTECODE(LOOKUP_MAP8) { |
| 527 | // Look up character in a byte map. Use the byte as an index into a |
| 528 | // table that follows this instruction immediately. |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 529 | int index = current_char - (insn >> BYTECODE_SHIFT); |
| 530 | byte map = code_base[Load32Aligned(pc + 4) + index]; |
| 531 | const byte* new_pc = code_base + Load32Aligned(pc + 8) + (map << 2); |
| 532 | pc = code_base + Load32Aligned(new_pc); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 533 | break; |
| 534 | } |
| 535 | BYTECODE(LOOKUP_HI_MAP8) { |
| 536 | // Look up high byte of this character in a byte map. Use the byte as |
| 537 | // an index into a table that follows this instruction immediately. |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 538 | int index = (current_char >> 8) - (insn >> BYTECODE_SHIFT); |
| 539 | byte map = code_base[Load32Aligned(pc + 4) + index]; |
| 540 | const byte* new_pc = code_base + Load32Aligned(pc + 8) + (map << 2); |
| 541 | pc = code_base + Load32Aligned(new_pc); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 542 | break; |
| 543 | } |
| 544 | BYTECODE(CHECK_NOT_REGS_EQUAL) |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 545 | if (registers[insn >> BYTECODE_SHIFT] == |
| 546 | registers[Load32Aligned(pc + 4)]) { |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 547 | pc += BC_CHECK_NOT_REGS_EQUAL_LENGTH; |
| 548 | } else { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 549 | pc = code_base + Load32Aligned(pc + 8); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 550 | } |
| 551 | break; |
| 552 | BYTECODE(CHECK_NOT_BACK_REF) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 553 | int from = registers[insn >> BYTECODE_SHIFT]; |
| 554 | int len = registers[(insn >> BYTECODE_SHIFT) + 1] - from; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 555 | if (from < 0 || len <= 0) { |
| 556 | pc += BC_CHECK_NOT_BACK_REF_LENGTH; |
| 557 | break; |
| 558 | } |
| 559 | if (current + len > subject.length()) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 560 | pc = code_base + Load32Aligned(pc + 4); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 561 | break; |
| 562 | } else { |
| 563 | int i; |
| 564 | for (i = 0; i < len; i++) { |
| 565 | if (subject[from + i] != subject[current + i]) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 566 | pc = code_base + Load32Aligned(pc + 4); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 567 | break; |
| 568 | } |
| 569 | } |
| 570 | if (i < len) break; |
| 571 | current += len; |
| 572 | } |
| 573 | pc += BC_CHECK_NOT_BACK_REF_LENGTH; |
| 574 | break; |
| 575 | } |
| 576 | BYTECODE(CHECK_NOT_BACK_REF_NO_CASE) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 577 | int from = registers[insn >> BYTECODE_SHIFT]; |
| 578 | int len = registers[(insn >> BYTECODE_SHIFT) + 1] - from; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 579 | if (from < 0 || len <= 0) { |
| 580 | pc += BC_CHECK_NOT_BACK_REF_NO_CASE_LENGTH; |
| 581 | break; |
| 582 | } |
| 583 | if (current + len > subject.length()) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 584 | pc = code_base + Load32Aligned(pc + 4); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 585 | break; |
| 586 | } else { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 587 | if (BackRefMatchesNoCase(isolate->interp_canonicalize_mapping(), |
| 588 | from, current, len, subject)) { |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 589 | current += len; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 590 | pc += BC_CHECK_NOT_BACK_REF_NO_CASE_LENGTH; |
| 591 | } else { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 592 | pc = code_base + Load32Aligned(pc + 4); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 593 | } |
| 594 | } |
| 595 | break; |
| 596 | } |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 597 | BYTECODE(CHECK_AT_START) |
| 598 | if (current == 0) { |
| 599 | pc = code_base + Load32Aligned(pc + 4); |
| 600 | } else { |
| 601 | pc += BC_CHECK_AT_START_LENGTH; |
| 602 | } |
| 603 | break; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 604 | BYTECODE(CHECK_NOT_AT_START) |
| 605 | if (current == 0) { |
| 606 | pc += BC_CHECK_NOT_AT_START_LENGTH; |
| 607 | } else { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 608 | pc = code_base + Load32Aligned(pc + 4); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 609 | } |
| 610 | break; |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 611 | BYTECODE(SET_CURRENT_POSITION_FROM_END) { |
| 612 | int by = static_cast<uint32_t>(insn) >> BYTECODE_SHIFT; |
| 613 | if (subject.length() - current > by) { |
| 614 | current = subject.length() - by; |
| 615 | current_char = subject[current - 1]; |
| 616 | } |
| 617 | pc += BC_SET_CURRENT_POSITION_FROM_END_LENGTH; |
| 618 | break; |
| 619 | } |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 620 | default: |
| 621 | UNREACHABLE(); |
| 622 | break; |
| 623 | } |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 628 | RegExpImpl::IrregexpResult IrregexpInterpreter::Match( |
| 629 | Isolate* isolate, |
| 630 | Handle<ByteArray> code_array, |
| 631 | Handle<String> subject, |
| 632 | int* registers, |
| 633 | int start_position) { |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 634 | ASSERT(subject->IsFlat()); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 635 | |
| 636 | AssertNoAllocation a; |
| 637 | const byte* code_base = code_array->GetDataStartAddress(); |
| 638 | uc16 previous_char = '\n'; |
ricow@chromium.org | ddd545c | 2011-08-24 12:02:41 +0000 | [diff] [blame] | 639 | String::FlatContent subject_content = subject->GetFlatContent(); |
| 640 | if (subject_content.IsAscii()) { |
| 641 | Vector<const char> subject_vector = subject_content.ToAsciiVector(); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 642 | if (start_position != 0) previous_char = subject_vector[start_position - 1]; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 643 | return RawMatch(isolate, |
| 644 | code_base, |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 645 | subject_vector, |
| 646 | registers, |
| 647 | start_position, |
| 648 | previous_char); |
| 649 | } else { |
ricow@chromium.org | ddd545c | 2011-08-24 12:02:41 +0000 | [diff] [blame] | 650 | ASSERT(subject_content.IsTwoByte()); |
| 651 | Vector<const uc16> subject_vector = subject_content.ToUC16Vector(); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 652 | if (start_position != 0) previous_char = subject_vector[start_position - 1]; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 653 | return RawMatch(isolate, |
| 654 | code_base, |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 655 | subject_vector, |
| 656 | registers, |
| 657 | start_position, |
| 658 | previous_char); |
| 659 | } |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 660 | } |
| 661 | |
| 662 | } } // namespace v8::internal |