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Issue 11308066: Rename IsAsciiRepresentation (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 8 years, 1 month ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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1298 return RETRY; 1298 return RETRY;
1299 } 1299 }
1300 1300
1301 // Prepare for possible GC. 1301 // Prepare for possible GC.
1302 HandleScope handles(isolate); 1302 HandleScope handles(isolate);
1303 Handle<Code> code_handle(re_code); 1303 Handle<Code> code_handle(re_code);
1304 1304
1305 Handle<String> subject(frame_entry<String*>(re_frame, kInputString)); 1305 Handle<String> subject(frame_entry<String*>(re_frame, kInputString));
1306 1306
1307 // Current string. 1307 // Current string.
1308 bool is_ascii = subject->IsAsciiRepresentationUnderneath(); 1308 bool is_ascii = subject->IsOneByteRepresentationUnderneath();
1309 1309
1310 ASSERT(re_code->instruction_start() <= *return_address); 1310 ASSERT(re_code->instruction_start() <= *return_address);
1311 ASSERT(*return_address <= 1311 ASSERT(*return_address <=
1312 re_code->instruction_start() + re_code->instruction_size()); 1312 re_code->instruction_start() + re_code->instruction_size());
1313 1313
1314 MaybeObject* result = Execution::HandleStackGuardInterrupt(isolate); 1314 MaybeObject* result = Execution::HandleStackGuardInterrupt(isolate);
1315 1315
1316 if (*code_handle != re_code) { // Return address no longer valid 1316 if (*code_handle != re_code) { // Return address no longer valid
1317 intptr_t delta = code_handle->address() - re_code->address(); 1317 intptr_t delta = code_handle->address() - re_code->address();
1318 // Overwrite the return address on the stack. 1318 // Overwrite the return address on the stack.
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1329 // Extract the underlying string and the slice offset. 1329 // Extract the underlying string and the slice offset.
1330 if (StringShape(*subject_tmp).IsCons()) { 1330 if (StringShape(*subject_tmp).IsCons()) {
1331 subject_tmp = Handle<String>(ConsString::cast(*subject_tmp)->first()); 1331 subject_tmp = Handle<String>(ConsString::cast(*subject_tmp)->first());
1332 } else if (StringShape(*subject_tmp).IsSliced()) { 1332 } else if (StringShape(*subject_tmp).IsSliced()) {
1333 SlicedString* slice = SlicedString::cast(*subject_tmp); 1333 SlicedString* slice = SlicedString::cast(*subject_tmp);
1334 subject_tmp = Handle<String>(slice->parent()); 1334 subject_tmp = Handle<String>(slice->parent());
1335 slice_offset = slice->offset(); 1335 slice_offset = slice->offset();
1336 } 1336 }
1337 1337
1338 // String might have changed. 1338 // String might have changed.
1339 if (subject_tmp->IsAsciiRepresentation() != is_ascii) { 1339 if (subject_tmp->IsOneByteRepresentation() != is_ascii) {
1340 // If we changed between an ASCII and an UC16 string, the specialized 1340 // If we changed between an ASCII and an UC16 string, the specialized
1341 // code cannot be used, and we need to restart regexp matching from 1341 // code cannot be used, and we need to restart regexp matching from
1342 // scratch (including, potentially, compiling a new version of the code). 1342 // scratch (including, potentially, compiling a new version of the code).
1343 return RETRY; 1343 return RETRY;
1344 } 1344 }
1345 1345
1346 // Otherwise, the content of the string might have moved. It must still 1346 // Otherwise, the content of the string might have moved. It must still
1347 // be a sequential or external string with the same content. 1347 // be a sequential or external string with the same content.
1348 // Update the start and end pointers in the stack frame to the current 1348 // Update the start and end pointers in the stack frame to the current
1349 // location (whether it has actually moved or not). 1349 // location (whether it has actually moved or not).
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1535 } 1535 }
1536 } 1536 }
1537 1537
1538 #undef __ 1538 #undef __
1539 1539
1540 #endif // V8_INTERPRETED_REGEXP 1540 #endif // V8_INTERPRETED_REGEXP
1541 1541
1542 }} // namespace v8::internal 1542 }} // namespace v8::internal
1543 1543
1544 #endif // V8_TARGET_ARCH_X64 1544 #endif // V8_TARGET_ARCH_X64
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