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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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258 | 258 |
259 BasicJsonStringifier::BasicJsonStringifier(Isolate* isolate) | 259 BasicJsonStringifier::BasicJsonStringifier(Isolate* isolate) |
260 : isolate_(isolate), | 260 : isolate_(isolate), |
261 current_index_(0), | 261 current_index_(0), |
262 is_ascii_(true), | 262 is_ascii_(true), |
263 overflowed_(false) { | 263 overflowed_(false) { |
264 factory_ = isolate_->factory(); | 264 factory_ = isolate_->factory(); |
265 accumulator_store_ = Handle<JSValue>::cast( | 265 accumulator_store_ = Handle<JSValue>::cast( |
266 factory_->ToObject(factory_->empty_string())); | 266 factory_->ToObject(factory_->empty_string())); |
267 part_length_ = kInitialPartLength; | 267 part_length_ = kInitialPartLength; |
268 current_part_ = factory_->NewRawOneByteString(part_length_); | 268 current_part_ = factory_->NewRawOneByteString(part_length_).ToHandleChecked(); |
269 ASSERT(!current_part_.is_null()); | |
270 tojson_string_ = factory_->toJSON_string(); | 269 tojson_string_ = factory_->toJSON_string(); |
271 stack_ = factory_->NewJSArray(8); | 270 stack_ = factory_->NewJSArray(8); |
272 } | 271 } |
273 | 272 |
274 | 273 |
275 MaybeObject* BasicJsonStringifier::Stringify(Handle<Object> object) { | 274 MaybeObject* BasicJsonStringifier::Stringify(Handle<Object> object) { |
276 switch (SerializeObject(object)) { | 275 switch (SerializeObject(object)) { |
277 case UNCHANGED: | 276 case UNCHANGED: |
278 return isolate_->heap()->undefined_value(); | 277 return isolate_->heap()->undefined_value(); |
279 case SUCCESS: { | 278 case SUCCESS: { |
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301 object->length() * kJsonQuoteWorstCaseBlowup + kSpaceForQuotes; | 300 object->length() * kJsonQuoteWorstCaseBlowup + kSpaceForQuotes; |
302 | 301 |
303 if (worst_case_length > 32 * KB) { // Slow path if too large. | 302 if (worst_case_length > 32 * KB) { // Slow path if too large. |
304 BasicJsonStringifier stringifier(isolate); | 303 BasicJsonStringifier stringifier(isolate); |
305 return stringifier.Stringify(object); | 304 return stringifier.Stringify(object); |
306 } | 305 } |
307 | 306 |
308 FlattenString(object); | 307 FlattenString(object); |
309 ASSERT(object->IsFlat()); | 308 ASSERT(object->IsFlat()); |
310 if (object->IsOneByteRepresentationUnderneath()) { | 309 if (object->IsOneByteRepresentationUnderneath()) { |
311 Handle<String> result = | 310 Handle<String> result = isolate->factory()->NewRawOneByteString( |
312 isolate->factory()->NewRawOneByteString(worst_case_length); | 311 worst_case_length).ToHandleChecked(); |
313 ASSERT(!result.is_null()); | |
314 DisallowHeapAllocation no_gc; | 312 DisallowHeapAllocation no_gc; |
315 return StringifyString_<SeqOneByteString>( | 313 return StringifyString_<SeqOneByteString>( |
316 isolate, | 314 isolate, |
317 object->GetFlatContent().ToOneByteVector(), | 315 object->GetFlatContent().ToOneByteVector(), |
318 result); | 316 result); |
319 } else { | 317 } else { |
320 Handle<String> result = | 318 Handle<String> result = isolate->factory()->NewRawTwoByteString( |
321 isolate->factory()->NewRawTwoByteString(worst_case_length); | 319 worst_case_length).ToHandleChecked(); |
322 ASSERT(!result.is_null()); | |
323 DisallowHeapAllocation no_gc; | 320 DisallowHeapAllocation no_gc; |
324 return StringifyString_<SeqTwoByteString>( | 321 return StringifyString_<SeqTwoByteString>( |
325 isolate, | 322 isolate, |
326 object->GetFlatContent().ToUC16Vector(), | 323 object->GetFlatContent().ToUC16Vector(), |
327 result); | 324 result); |
328 } | 325 } |
329 } | 326 } |
330 | 327 |
331 | 328 |
332 template <typename ResultType, typename Char> | 329 template <typename ResultType, typename Char> |
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735 } | 732 } |
736 } | 733 } |
737 | 734 |
738 | 735 |
739 void BasicJsonStringifier::Extend() { | 736 void BasicJsonStringifier::Extend() { |
740 Accumulate(); | 737 Accumulate(); |
741 if (part_length_ <= kMaxPartLength / kPartLengthGrowthFactor) { | 738 if (part_length_ <= kMaxPartLength / kPartLengthGrowthFactor) { |
742 part_length_ *= kPartLengthGrowthFactor; | 739 part_length_ *= kPartLengthGrowthFactor; |
743 } | 740 } |
744 if (is_ascii_) { | 741 if (is_ascii_) { |
745 current_part_ = factory_->NewRawOneByteString(part_length_); | 742 current_part_ = |
| 743 factory_->NewRawOneByteString(part_length_).ToHandleChecked(); |
746 } else { | 744 } else { |
747 current_part_ = factory_->NewRawTwoByteString(part_length_); | 745 current_part_ = |
| 746 factory_->NewRawTwoByteString(part_length_).ToHandleChecked(); |
748 } | 747 } |
749 ASSERT(!current_part_.is_null()); | 748 ASSERT(!current_part_.is_null()); |
750 current_index_ = 0; | 749 current_index_ = 0; |
751 } | 750 } |
752 | 751 |
753 | 752 |
754 void BasicJsonStringifier::ChangeEncoding() { | 753 void BasicJsonStringifier::ChangeEncoding() { |
755 ShrinkCurrentPart(); | 754 ShrinkCurrentPart(); |
756 Accumulate(); | 755 Accumulate(); |
757 current_part_ = factory_->NewRawTwoByteString(part_length_); | 756 current_part_ = |
| 757 factory_->NewRawTwoByteString(part_length_).ToHandleChecked(); |
758 ASSERT(!current_part_.is_null()); | 758 ASSERT(!current_part_.is_null()); |
759 current_index_ = 0; | 759 current_index_ = 0; |
760 is_ascii_ = false; | 760 is_ascii_ = false; |
761 } | 761 } |
762 | 762 |
763 | 763 |
764 template <typename SrcChar, typename DestChar> | 764 template <typename SrcChar, typename DestChar> |
765 int BasicJsonStringifier::SerializeStringUnchecked_(const SrcChar* src, | 765 int BasicJsonStringifier::SerializeStringUnchecked_(const SrcChar* src, |
766 DestChar* dest, | 766 DestChar* dest, |
767 int length) { | 767 int length) { |
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877 SerializeString_<false, uint8_t>(object); | 877 SerializeString_<false, uint8_t>(object); |
878 } else { | 878 } else { |
879 SerializeString_<false, uc16>(object); | 879 SerializeString_<false, uc16>(object); |
880 } | 880 } |
881 } | 881 } |
882 } | 882 } |
883 | 883 |
884 } } // namespace v8::internal | 884 } } // namespace v8::internal |
885 | 885 |
886 #endif // V8_JSON_STRINGIFIER_H_ | 886 #endif // V8_JSON_STRINGIFIER_H_ |
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