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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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222 return StringShape(String::cast(this)).IsSliced(); | 222 return StringShape(String::cast(this)).IsSliced(); |
223 } | 223 } |
224 | 224 |
225 | 225 |
226 bool Object::IsSeqString() { | 226 bool Object::IsSeqString() { |
227 if (!IsString()) return false; | 227 if (!IsString()) return false; |
228 return StringShape(String::cast(this)).IsSequential(); | 228 return StringShape(String::cast(this)).IsSequential(); |
229 } | 229 } |
230 | 230 |
231 | 231 |
232 bool Object::IsSeqAsciiString() { | 232 bool Object::IsSeqOneByteString() { |
233 if (!IsString()) return false; | 233 if (!IsString()) return false; |
234 return StringShape(String::cast(this)).IsSequential() && | 234 return StringShape(String::cast(this)).IsSequential() && |
235 String::cast(this)->IsAsciiRepresentation(); | 235 String::cast(this)->IsAsciiRepresentation(); |
236 } | 236 } |
237 | 237 |
238 | 238 |
239 bool Object::IsSeqTwoByteString() { | 239 bool Object::IsSeqTwoByteString() { |
240 if (!IsString()) return false; | 240 if (!IsString()) return false; |
241 return StringShape(String::cast(this)).IsSequential() && | 241 return StringShape(String::cast(this)).IsSequential() && |
242 String::cast(this)->IsTwoByteRepresentation(); | 242 String::cast(this)->IsTwoByteRepresentation(); |
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2351 CAST_ACCESSOR(SymbolTable) | 2351 CAST_ACCESSOR(SymbolTable) |
2352 CAST_ACCESSOR(JSFunctionResultCache) | 2352 CAST_ACCESSOR(JSFunctionResultCache) |
2353 CAST_ACCESSOR(NormalizedMapCache) | 2353 CAST_ACCESSOR(NormalizedMapCache) |
2354 CAST_ACCESSOR(ScopeInfo) | 2354 CAST_ACCESSOR(ScopeInfo) |
2355 CAST_ACCESSOR(CompilationCacheTable) | 2355 CAST_ACCESSOR(CompilationCacheTable) |
2356 CAST_ACCESSOR(CodeCacheHashTable) | 2356 CAST_ACCESSOR(CodeCacheHashTable) |
2357 CAST_ACCESSOR(PolymorphicCodeCacheHashTable) | 2357 CAST_ACCESSOR(PolymorphicCodeCacheHashTable) |
2358 CAST_ACCESSOR(MapCache) | 2358 CAST_ACCESSOR(MapCache) |
2359 CAST_ACCESSOR(String) | 2359 CAST_ACCESSOR(String) |
2360 CAST_ACCESSOR(SeqString) | 2360 CAST_ACCESSOR(SeqString) |
2361 CAST_ACCESSOR(SeqAsciiString) | 2361 CAST_ACCESSOR(SeqOneByteString) |
2362 CAST_ACCESSOR(SeqTwoByteString) | 2362 CAST_ACCESSOR(SeqTwoByteString) |
2363 CAST_ACCESSOR(SlicedString) | 2363 CAST_ACCESSOR(SlicedString) |
2364 CAST_ACCESSOR(ConsString) | 2364 CAST_ACCESSOR(ConsString) |
2365 CAST_ACCESSOR(ExternalString) | 2365 CAST_ACCESSOR(ExternalString) |
2366 CAST_ACCESSOR(ExternalAsciiString) | 2366 CAST_ACCESSOR(ExternalAsciiString) |
2367 CAST_ACCESSOR(ExternalTwoByteString) | 2367 CAST_ACCESSOR(ExternalTwoByteString) |
2368 CAST_ACCESSOR(JSReceiver) | 2368 CAST_ACCESSOR(JSReceiver) |
2369 CAST_ACCESSOR(JSObject) | 2369 CAST_ACCESSOR(JSObject) |
2370 CAST_ACCESSOR(Smi) | 2370 CAST_ACCESSOR(Smi) |
2371 CAST_ACCESSOR(HeapObject) | 2371 CAST_ACCESSOR(HeapObject) |
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2456 Object* successfully_flattened; | 2456 Object* successfully_flattened; |
2457 if (!flat->ToObject(&successfully_flattened)) return this; | 2457 if (!flat->ToObject(&successfully_flattened)) return this; |
2458 return String::cast(successfully_flattened); | 2458 return String::cast(successfully_flattened); |
2459 } | 2459 } |
2460 | 2460 |
2461 | 2461 |
2462 uint16_t String::Get(int index) { | 2462 uint16_t String::Get(int index) { |
2463 ASSERT(index >= 0 && index < length()); | 2463 ASSERT(index >= 0 && index < length()); |
2464 switch (StringShape(this).full_representation_tag()) { | 2464 switch (StringShape(this).full_representation_tag()) { |
2465 case kSeqStringTag | kOneByteStringTag: | 2465 case kSeqStringTag | kOneByteStringTag: |
2466 return SeqAsciiString::cast(this)->SeqAsciiStringGet(index); | 2466 return SeqOneByteString::cast(this)->SeqOneByteStringGet(index); |
2467 case kSeqStringTag | kTwoByteStringTag: | 2467 case kSeqStringTag | kTwoByteStringTag: |
2468 return SeqTwoByteString::cast(this)->SeqTwoByteStringGet(index); | 2468 return SeqTwoByteString::cast(this)->SeqTwoByteStringGet(index); |
2469 case kConsStringTag | kOneByteStringTag: | 2469 case kConsStringTag | kOneByteStringTag: |
2470 case kConsStringTag | kTwoByteStringTag: | 2470 case kConsStringTag | kTwoByteStringTag: |
2471 return ConsString::cast(this)->ConsStringGet(index); | 2471 return ConsString::cast(this)->ConsStringGet(index); |
2472 case kExternalStringTag | kOneByteStringTag: | 2472 case kExternalStringTag | kOneByteStringTag: |
2473 return ExternalAsciiString::cast(this)->ExternalAsciiStringGet(index); | 2473 return ExternalAsciiString::cast(this)->ExternalAsciiStringGet(index); |
2474 case kExternalStringTag | kTwoByteStringTag: | 2474 case kExternalStringTag | kTwoByteStringTag: |
2475 return ExternalTwoByteString::cast(this)->ExternalTwoByteStringGet(index); | 2475 return ExternalTwoByteString::cast(this)->ExternalTwoByteStringGet(index); |
2476 case kSlicedStringTag | kOneByteStringTag: | 2476 case kSlicedStringTag | kOneByteStringTag: |
2477 case kSlicedStringTag | kTwoByteStringTag: | 2477 case kSlicedStringTag | kTwoByteStringTag: |
2478 return SlicedString::cast(this)->SlicedStringGet(index); | 2478 return SlicedString::cast(this)->SlicedStringGet(index); |
2479 default: | 2479 default: |
2480 break; | 2480 break; |
2481 } | 2481 } |
2482 | 2482 |
2483 UNREACHABLE(); | 2483 UNREACHABLE(); |
2484 return 0; | 2484 return 0; |
2485 } | 2485 } |
2486 | 2486 |
2487 | 2487 |
2488 void String::Set(int index, uint16_t value) { | 2488 void String::Set(int index, uint16_t value) { |
2489 ASSERT(index >= 0 && index < length()); | 2489 ASSERT(index >= 0 && index < length()); |
2490 ASSERT(StringShape(this).IsSequential()); | 2490 ASSERT(StringShape(this).IsSequential()); |
2491 | 2491 |
2492 return this->IsAsciiRepresentation() | 2492 return this->IsAsciiRepresentation() |
2493 ? SeqAsciiString::cast(this)->SeqAsciiStringSet(index, value) | 2493 ? SeqOneByteString::cast(this)->SeqOneByteStringSet(index, value) |
2494 : SeqTwoByteString::cast(this)->SeqTwoByteStringSet(index, value); | 2494 : SeqTwoByteString::cast(this)->SeqTwoByteStringSet(index, value); |
2495 } | 2495 } |
2496 | 2496 |
2497 | 2497 |
2498 bool String::IsFlat() { | 2498 bool String::IsFlat() { |
2499 if (!StringShape(this).IsCons()) return true; | 2499 if (!StringShape(this).IsCons()) return true; |
2500 return ConsString::cast(this)->second()->length() == 0; | 2500 return ConsString::cast(this)->second()->length() == 0; |
2501 } | 2501 } |
2502 | 2502 |
2503 | 2503 |
2504 String* String::GetUnderlying() { | 2504 String* String::GetUnderlying() { |
2505 // Giving direct access to underlying string only makes sense if the | 2505 // Giving direct access to underlying string only makes sense if the |
2506 // wrapping string is already flattened. | 2506 // wrapping string is already flattened. |
2507 ASSERT(this->IsFlat()); | 2507 ASSERT(this->IsFlat()); |
2508 ASSERT(StringShape(this).IsIndirect()); | 2508 ASSERT(StringShape(this).IsIndirect()); |
2509 STATIC_ASSERT(ConsString::kFirstOffset == SlicedString::kParentOffset); | 2509 STATIC_ASSERT(ConsString::kFirstOffset == SlicedString::kParentOffset); |
2510 const int kUnderlyingOffset = SlicedString::kParentOffset; | 2510 const int kUnderlyingOffset = SlicedString::kParentOffset; |
2511 return String::cast(READ_FIELD(this, kUnderlyingOffset)); | 2511 return String::cast(READ_FIELD(this, kUnderlyingOffset)); |
2512 } | 2512 } |
2513 | 2513 |
2514 | 2514 |
2515 uint16_t SeqAsciiString::SeqAsciiStringGet(int index) { | 2515 uint16_t SeqOneByteString::SeqOneByteStringGet(int index) { |
2516 ASSERT(index >= 0 && index < length()); | 2516 ASSERT(index >= 0 && index < length()); |
2517 return READ_BYTE_FIELD(this, kHeaderSize + index * kCharSize); | 2517 return READ_BYTE_FIELD(this, kHeaderSize + index * kCharSize); |
2518 } | 2518 } |
2519 | 2519 |
2520 | 2520 |
2521 void SeqAsciiString::SeqAsciiStringSet(int index, uint16_t value) { | 2521 void SeqOneByteString::SeqOneByteStringSet(int index, uint16_t value) { |
2522 ASSERT(index >= 0 && index < length() && value <= kMaxAsciiCharCode); | 2522 ASSERT(index >= 0 && index < length() && value <= kMaxAsciiCharCode); |
2523 WRITE_BYTE_FIELD(this, kHeaderSize + index * kCharSize, | 2523 WRITE_BYTE_FIELD(this, kHeaderSize + index * kCharSize, |
2524 static_cast<byte>(value)); | 2524 static_cast<byte>(value)); |
2525 } | 2525 } |
2526 | 2526 |
2527 | 2527 |
2528 Address SeqAsciiString::GetCharsAddress() { | 2528 Address SeqOneByteString::GetCharsAddress() { |
2529 return FIELD_ADDR(this, kHeaderSize); | 2529 return FIELD_ADDR(this, kHeaderSize); |
2530 } | 2530 } |
2531 | 2531 |
2532 | 2532 |
2533 char* SeqAsciiString::GetChars() { | 2533 char* SeqOneByteString::GetChars() { |
2534 return reinterpret_cast<char*>(GetCharsAddress()); | 2534 return reinterpret_cast<char*>(GetCharsAddress()); |
2535 } | 2535 } |
2536 | 2536 |
2537 | 2537 |
2538 Address SeqTwoByteString::GetCharsAddress() { | 2538 Address SeqTwoByteString::GetCharsAddress() { |
2539 return FIELD_ADDR(this, kHeaderSize); | 2539 return FIELD_ADDR(this, kHeaderSize); |
2540 } | 2540 } |
2541 | 2541 |
2542 | 2542 |
2543 uc16* SeqTwoByteString::GetChars() { | 2543 uc16* SeqTwoByteString::GetChars() { |
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2555 ASSERT(index >= 0 && index < length()); | 2555 ASSERT(index >= 0 && index < length()); |
2556 WRITE_SHORT_FIELD(this, kHeaderSize + index * kShortSize, value); | 2556 WRITE_SHORT_FIELD(this, kHeaderSize + index * kShortSize, value); |
2557 } | 2557 } |
2558 | 2558 |
2559 | 2559 |
2560 int SeqTwoByteString::SeqTwoByteStringSize(InstanceType instance_type) { | 2560 int SeqTwoByteString::SeqTwoByteStringSize(InstanceType instance_type) { |
2561 return SizeFor(length()); | 2561 return SizeFor(length()); |
2562 } | 2562 } |
2563 | 2563 |
2564 | 2564 |
2565 int SeqAsciiString::SeqAsciiStringSize(InstanceType instance_type) { | 2565 int SeqOneByteString::SeqOneByteStringSize(InstanceType instance_type) { |
2566 return SizeFor(length()); | 2566 return SizeFor(length()); |
2567 } | 2567 } |
2568 | 2568 |
2569 | 2569 |
2570 String* SlicedString::parent() { | 2570 String* SlicedString::parent() { |
2571 return String::cast(READ_FIELD(this, kParentOffset)); | 2571 return String::cast(READ_FIELD(this, kParentOffset)); |
2572 } | 2572 } |
2573 | 2573 |
2574 | 2574 |
2575 void SlicedString::set_parent(String* parent, WriteBarrierMode mode) { | 2575 void SlicedString::set_parent(String* parent, WriteBarrierMode mode) { |
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2973 int instance_size = map->instance_size(); | 2973 int instance_size = map->instance_size(); |
2974 if (instance_size != kVariableSizeSentinel) return instance_size; | 2974 if (instance_size != kVariableSizeSentinel) return instance_size; |
2975 // We can ignore the "symbol" bit becase it is only set for symbols | 2975 // We can ignore the "symbol" bit becase it is only set for symbols |
2976 // and implies a string type. | 2976 // and implies a string type. |
2977 int instance_type = static_cast<int>(map->instance_type()) & ~kIsSymbolMask; | 2977 int instance_type = static_cast<int>(map->instance_type()) & ~kIsSymbolMask; |
2978 // Only inline the most frequent cases. | 2978 // Only inline the most frequent cases. |
2979 if (instance_type == FIXED_ARRAY_TYPE) { | 2979 if (instance_type == FIXED_ARRAY_TYPE) { |
2980 return FixedArray::BodyDescriptor::SizeOf(map, this); | 2980 return FixedArray::BodyDescriptor::SizeOf(map, this); |
2981 } | 2981 } |
2982 if (instance_type == ASCII_STRING_TYPE) { | 2982 if (instance_type == ASCII_STRING_TYPE) { |
2983 return SeqAsciiString::SizeFor( | 2983 return SeqOneByteString::SizeFor( |
2984 reinterpret_cast<SeqAsciiString*>(this)->length()); | 2984 reinterpret_cast<SeqOneByteString*>(this)->length()); |
2985 } | 2985 } |
2986 if (instance_type == BYTE_ARRAY_TYPE) { | 2986 if (instance_type == BYTE_ARRAY_TYPE) { |
2987 return reinterpret_cast<ByteArray*>(this)->ByteArraySize(); | 2987 return reinterpret_cast<ByteArray*>(this)->ByteArraySize(); |
2988 } | 2988 } |
2989 if (instance_type == FREE_SPACE_TYPE) { | 2989 if (instance_type == FREE_SPACE_TYPE) { |
2990 return reinterpret_cast<FreeSpace*>(this)->size(); | 2990 return reinterpret_cast<FreeSpace*>(this)->size(); |
2991 } | 2991 } |
2992 if (instance_type == STRING_TYPE) { | 2992 if (instance_type == STRING_TYPE) { |
2993 return SeqTwoByteString::SizeFor( | 2993 return SeqTwoByteString::SizeFor( |
2994 reinterpret_cast<SeqTwoByteString*>(this)->length()); | 2994 reinterpret_cast<SeqTwoByteString*>(this)->length()); |
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5541 #undef WRITE_UINT32_FIELD | 5541 #undef WRITE_UINT32_FIELD |
5542 #undef READ_SHORT_FIELD | 5542 #undef READ_SHORT_FIELD |
5543 #undef WRITE_SHORT_FIELD | 5543 #undef WRITE_SHORT_FIELD |
5544 #undef READ_BYTE_FIELD | 5544 #undef READ_BYTE_FIELD |
5545 #undef WRITE_BYTE_FIELD | 5545 #undef WRITE_BYTE_FIELD |
5546 | 5546 |
5547 | 5547 |
5548 } } // namespace v8::internal | 5548 } } // namespace v8::internal |
5549 | 5549 |
5550 #endif // V8_OBJECTS_INL_H_ | 5550 #endif // V8_OBJECTS_INL_H_ |
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