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1 // Copyright 2006-2010 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2010 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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36 namespace internal { | 36 namespace internal { |
37 | 37 |
38 int Heap::MaxObjectSizeInPagedSpace() { | 38 int Heap::MaxObjectSizeInPagedSpace() { |
39 return Page::kMaxHeapObjectSize; | 39 return Page::kMaxHeapObjectSize; |
40 } | 40 } |
41 | 41 |
42 | 42 |
43 MaybeObject* Heap::AllocateStringFromUtf8(Vector<const char> str, | 43 MaybeObject* Heap::AllocateStringFromUtf8(Vector<const char> str, |
44 PretenureFlag pretenure) { | 44 PretenureFlag pretenure) { |
45 // Check for ASCII first since this is the common case. | 45 // Check for ASCII first since this is the common case. |
46 for (int i = 0; i < str.length(); ++i) { | 46 if (String::IsAscii(str.start(), str.length())) { |
47 if (static_cast<uint8_t>(str[i]) > String::kMaxAsciiCharCodeU) { | 47 // If the string is ASCII, we do not need to convert the characters |
48 // Non-ASCII and we need to decode. | 48 // since UTF8 is backwards compatible with ASCII. |
49 return AllocateStringFromUtf8Slow(str, pretenure); | 49 return AllocateStringFromAscii(str, pretenure); |
50 } | |
51 } | 50 } |
52 // If the string is ASCII, we do not need to convert the characters | 51 // Non-ASCII and we need to decode. |
53 // since UTF8 is backwards compatible with ASCII. | 52 return AllocateStringFromUtf8Slow(str, pretenure); |
54 return AllocateStringFromAscii(str, pretenure); | |
55 } | 53 } |
56 | 54 |
57 | 55 |
58 MaybeObject* Heap::AllocateSymbol(Vector<const char> str, | 56 MaybeObject* Heap::AllocateSymbol(Vector<const char> str, |
59 int chars, | 57 int chars, |
60 uint32_t hash_field) { | 58 uint32_t hash_field) { |
61 unibrow::Utf8InputBuffer<> buffer(str.start(), | 59 unibrow::Utf8InputBuffer<> buffer(str.start(), |
62 static_cast<unsigned>(str.length())); | 60 static_cast<unsigned>(str.length())); |
63 return AllocateInternalSymbol(&buffer, chars, hash_field); | 61 return AllocateInternalSymbol(&buffer, chars, hash_field); |
64 } | 62 } |
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515 | 513 |
516 | 514 |
517 void ExternalStringTable::ShrinkNewStrings(int position) { | 515 void ExternalStringTable::ShrinkNewStrings(int position) { |
518 new_space_strings_.Rewind(position); | 516 new_space_strings_.Rewind(position); |
519 Verify(); | 517 Verify(); |
520 } | 518 } |
521 | 519 |
522 } } // namespace v8::internal | 520 } } // namespace v8::internal |
523 | 521 |
524 #endif // V8_HEAP_INL_H_ | 522 #endif // V8_HEAP_INL_H_ |
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