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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 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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519 // We need to create a longer sequential string for the result. | 519 // We need to create a longer sequential string for the result. |
520 return SlowScanJsonString<StringType, SinkChar>(seq_str, 0, count); | 520 return SlowScanJsonString<StringType, SinkChar>(seq_str, 0, count); |
521 } | 521 } |
522 if (c0_ != '\\') { | 522 if (c0_ != '\\') { |
523 // If the sink can contain UC16 characters, or source_ contains only | 523 // If the sink can contain UC16 characters, or source_ contains only |
524 // ASCII characters, there's no need to test whether we can store the | 524 // ASCII characters, there's no need to test whether we can store the |
525 // character. Otherwise check whether the UC16 source character can fit | 525 // character. Otherwise check whether the UC16 source character can fit |
526 // in the ASCII sink. | 526 // in the ASCII sink. |
527 if (sizeof(SinkChar) == kUC16Size || | 527 if (sizeof(SinkChar) == kUC16Size || |
528 seq_ascii || | 528 seq_ascii || |
529 c0_ <= kMaxAsciiCharCode) { | 529 c0_ <= String::kMaxOneByteCharCode) { |
530 SeqStringSet(seq_str, count++, c0_); | 530 SeqStringSet(seq_str, count++, c0_); |
531 Advance(); | 531 Advance(); |
532 } else { | 532 } else { |
533 // StringType is SeqOneByteString and we just read a non-ASCII char. | 533 // StringType is SeqOneByteString and we just read a non-ASCII char. |
534 return SlowScanJsonString<SeqTwoByteString, uc16>(seq_str, 0, count); | 534 return SlowScanJsonString<SeqTwoByteString, uc16>(seq_str, 0, count); |
535 } | 535 } |
536 } else { | 536 } else { |
537 Advance(); // Advance past the \. | 537 Advance(); // Advance past the \. |
538 switch (c0_) { | 538 switch (c0_) { |
539 case '"': | 539 case '"': |
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559 case 'u': { | 559 case 'u': { |
560 uc32 value = 0; | 560 uc32 value = 0; |
561 for (int i = 0; i < 4; i++) { | 561 for (int i = 0; i < 4; i++) { |
562 Advance(); | 562 Advance(); |
563 int digit = HexValue(c0_); | 563 int digit = HexValue(c0_); |
564 if (digit < 0) { | 564 if (digit < 0) { |
565 return Handle<String>::null(); | 565 return Handle<String>::null(); |
566 } | 566 } |
567 value = value * 16 + digit; | 567 value = value * 16 + digit; |
568 } | 568 } |
569 if (sizeof(SinkChar) == kUC16Size || value <= kMaxAsciiCharCode) { | 569 if (sizeof(SinkChar) == kUC16Size || |
| 570 value <= String::kMaxOneByteCharCode) { |
570 SeqStringSet(seq_str, count++, value); | 571 SeqStringSet(seq_str, count++, value); |
571 break; | 572 break; |
572 } else { | 573 } else { |
573 // StringType is SeqOneByteString and we just read a non-ASCII char. | 574 // StringType is SeqOneByteString and we just read a non-ASCII char. |
574 position_ -= 6; // Rewind position_ to \ in \uxxxx. | 575 position_ -= 6; // Rewind position_ to \ in \uxxxx. |
575 Advance(); | 576 Advance(); |
576 return SlowScanJsonString<SeqTwoByteString, uc16>(seq_str, | 577 return SlowScanJsonString<SeqTwoByteString, uc16>(seq_str, |
577 0, | 578 0, |
578 count); | 579 count); |
579 } | 580 } |
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642 } else { | 643 } else { |
643 running_hash = StringHasher::AddCharacterCore(running_hash, c0); | 644 running_hash = StringHasher::AddCharacterCore(running_hash, c0); |
644 } | 645 } |
645 position++; | 646 position++; |
646 if (position >= source_length_) return Handle<String>::null(); | 647 if (position >= source_length_) return Handle<String>::null(); |
647 c0 = seq_source_->SeqOneByteStringGet(position); | 648 c0 = seq_source_->SeqOneByteStringGet(position); |
648 } while (c0 != '"'); | 649 } while (c0 != '"'); |
649 int length = position - position_; | 650 int length = position - position_; |
650 uint32_t hash = (length <= String::kMaxHashCalcLength) | 651 uint32_t hash = (length <= String::kMaxHashCalcLength) |
651 ? StringHasher::GetHashCore(running_hash) : length; | 652 ? StringHasher::GetHashCore(running_hash) : length; |
652 Vector<const char> string_vector( | 653 Vector<const uint8_t> string_vector( |
653 seq_source_->GetChars() + position_, length); | 654 seq_source_->GetCharsU() + position_, length); |
654 SymbolTable* symbol_table = isolate()->heap()->symbol_table(); | 655 SymbolTable* symbol_table = isolate()->heap()->symbol_table(); |
655 uint32_t capacity = symbol_table->Capacity(); | 656 uint32_t capacity = symbol_table->Capacity(); |
656 uint32_t entry = SymbolTable::FirstProbe(hash, capacity); | 657 uint32_t entry = SymbolTable::FirstProbe(hash, capacity); |
657 uint32_t count = 1; | 658 uint32_t count = 1; |
658 while (true) { | 659 while (true) { |
659 Object* element = symbol_table->KeyAt(entry); | 660 Object* element = symbol_table->KeyAt(entry); |
660 if (element == isolate()->heap()->undefined_value()) { | 661 if (element == isolate()->heap()->undefined_value()) { |
661 // Lookup failure. | 662 // Lookup failure. |
662 break; | 663 break; |
663 } | 664 } |
664 if (element != isolate()->heap()->the_hole_value() && | 665 if (element != isolate()->heap()->the_hole_value() && |
665 String::cast(element)->IsAsciiEqualTo(string_vector)) { | 666 String::cast(element)->IsOneByteEqualTo(string_vector)) { |
666 // Lookup success, update the current position. | 667 // Lookup success, update the current position. |
667 position_ = position; | 668 position_ = position; |
668 // Advance past the last '"'. | 669 // Advance past the last '"'. |
669 AdvanceSkipWhitespace(); | 670 AdvanceSkipWhitespace(); |
670 return Handle<String>(String::cast(element), isolate()); | 671 return Handle<String>(String::cast(element), isolate()); |
671 } | 672 } |
672 entry = SymbolTable::NextProbe(entry, count++, capacity); | 673 entry = SymbolTable::NextProbe(entry, count++, capacity); |
673 } | 674 } |
674 } | 675 } |
675 | 676 |
676 int beg_pos = position_; | 677 int beg_pos = position_; |
677 // Fast case for ASCII only without escape characters. | 678 // Fast case for ASCII only without escape characters. |
678 do { | 679 do { |
679 // Check for control character (0x00-0x1f) or unterminated string (<0). | 680 // Check for control character (0x00-0x1f) or unterminated string (<0). |
680 if (c0_ < 0x20) return Handle<String>::null(); | 681 if (c0_ < 0x20) return Handle<String>::null(); |
681 if (c0_ != '\\') { | 682 if (c0_ != '\\') { |
682 if (seq_ascii || c0_ <= kMaxAsciiCharCode) { | 683 if (seq_ascii || c0_ <= String::kMaxOneByteCharCode) { |
683 Advance(); | 684 Advance(); |
684 } else { | 685 } else { |
685 return SlowScanJsonString<SeqTwoByteString, uc16>(source_, | 686 return SlowScanJsonString<SeqTwoByteString, uc16>(source_, |
686 beg_pos, | 687 beg_pos, |
687 position_); | 688 position_); |
688 } | 689 } |
689 } else { | 690 } else { |
690 return SlowScanJsonString<SeqOneByteString, char>(source_, | 691 return SlowScanJsonString<SeqOneByteString, char>(source_, |
691 beg_pos, | 692 beg_pos, |
692 position_); | 693 position_); |
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703 } | 704 } |
704 ASSERT_EQ('"', c0_); | 705 ASSERT_EQ('"', c0_); |
705 // Advance past the last '"'. | 706 // Advance past the last '"'. |
706 AdvanceSkipWhitespace(); | 707 AdvanceSkipWhitespace(); |
707 return result; | 708 return result; |
708 } | 709 } |
709 | 710 |
710 } } // namespace v8::internal | 711 } } // namespace v8::internal |
711 | 712 |
712 #endif // V8_JSON_PARSER_H_ | 713 #endif // V8_JSON_PARSER_H_ |
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