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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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1190 return RETRY; 1190 return RETRY;
1191 } 1191 }
1192 1192
1193 // Prepare for possible GC. 1193 // Prepare for possible GC.
1194 HandleScope handles(isolate); 1194 HandleScope handles(isolate);
1195 Handle<Code> code_handle(re_code); 1195 Handle<Code> code_handle(re_code);
1196 1196
1197 Handle<String> subject(frame_entry<String*>(re_frame, kInputString)); 1197 Handle<String> subject(frame_entry<String*>(re_frame, kInputString));
1198 1198
1199 // Current string. 1199 // Current string.
1200 bool is_ascii = subject->IsAsciiRepresentationUnderneath(); 1200 bool is_ascii = subject->IsOneByteRepresentationUnderneath();
1201 1201
1202 ASSERT(re_code->instruction_start() <= *return_address); 1202 ASSERT(re_code->instruction_start() <= *return_address);
1203 ASSERT(*return_address <= 1203 ASSERT(*return_address <=
1204 re_code->instruction_start() + re_code->instruction_size()); 1204 re_code->instruction_start() + re_code->instruction_size());
1205 1205
1206 MaybeObject* result = Execution::HandleStackGuardInterrupt(isolate); 1206 MaybeObject* result = Execution::HandleStackGuardInterrupt(isolate);
1207 1207
1208 if (*code_handle != re_code) { // Return address no longer valid 1208 if (*code_handle != re_code) { // Return address no longer valid
1209 int delta = code_handle->address() - re_code->address(); 1209 int delta = code_handle->address() - re_code->address();
1210 // Overwrite the return address on the stack. 1210 // Overwrite the return address on the stack.
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1221 // Extract the underlying string and the slice offset. 1221 // Extract the underlying string and the slice offset.
1222 if (StringShape(*subject_tmp).IsCons()) { 1222 if (StringShape(*subject_tmp).IsCons()) {
1223 subject_tmp = Handle<String>(ConsString::cast(*subject_tmp)->first()); 1223 subject_tmp = Handle<String>(ConsString::cast(*subject_tmp)->first());
1224 } else if (StringShape(*subject_tmp).IsSliced()) { 1224 } else if (StringShape(*subject_tmp).IsSliced()) {
1225 SlicedString* slice = SlicedString::cast(*subject_tmp); 1225 SlicedString* slice = SlicedString::cast(*subject_tmp);
1226 subject_tmp = Handle<String>(slice->parent()); 1226 subject_tmp = Handle<String>(slice->parent());
1227 slice_offset = slice->offset(); 1227 slice_offset = slice->offset();
1228 } 1228 }
1229 1229
1230 // String might have changed. 1230 // String might have changed.
1231 if (subject_tmp->IsAsciiRepresentation() != is_ascii) { 1231 if (subject_tmp->IsOneByteRepresentation() != is_ascii) {
1232 // If we changed between an ASCII and an UC16 string, the specialized 1232 // If we changed between an ASCII and an UC16 string, the specialized
1233 // code cannot be used, and we need to restart regexp matching from 1233 // code cannot be used, and we need to restart regexp matching from
1234 // scratch (including, potentially, compiling a new version of the code). 1234 // scratch (including, potentially, compiling a new version of the code).
1235 return RETRY; 1235 return RETRY;
1236 } 1236 }
1237 1237
1238 // Otherwise, the content of the string might have moved. It must still 1238 // Otherwise, the content of the string might have moved. It must still
1239 // be a sequential or external string with the same content. 1239 // be a sequential or external string with the same content.
1240 // Update the start and end pointers in the stack frame to the current 1240 // Update the start and end pointers in the stack frame to the current
1241 // location (whether it has actually moved or not). 1241 // location (whether it has actually moved or not).
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1399 } 1399 }
1400 1400
1401 1401
1402 #undef __ 1402 #undef __
1403 1403
1404 #endif // V8_INTERPRETED_REGEXP 1404 #endif // V8_INTERPRETED_REGEXP
1405 1405
1406 }} // namespace v8::internal 1406 }} // namespace v8::internal
1407 1407
1408 #endif // V8_TARGET_ARCH_IA32 1408 #endif // V8_TARGET_ARCH_IA32
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