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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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80 } | 80 } |
81 | 81 |
82 Handle<Object> ApplyToJsonFunction(Handle<Object> object, | 82 Handle<Object> ApplyToJsonFunction(Handle<Object> object, |
83 Handle<Object> key); | 83 Handle<Object> key); |
84 | 84 |
85 Result SerializeGeneric(Handle<Object> object, | 85 Result SerializeGeneric(Handle<Object> object, |
86 Handle<Object> key, | 86 Handle<Object> key, |
87 bool deferred_comma, | 87 bool deferred_comma, |
88 bool deferred_key); | 88 bool deferred_key); |
89 | 89 |
90 template <typename StringType> | 90 template <typename ResultType, typename Char> |
91 INLINE(static MaybeObject* StringifyString_(Isolate* isolate, | 91 INLINE(static MaybeObject* StringifyString_(Isolate* isolate, |
92 Handle<String> string, | 92 Vector<Char> vector, |
93 Handle<String> result)); | 93 Handle<String> result)); |
94 | 94 |
95 // Entry point to serialize the object. | 95 // Entry point to serialize the object. |
96 INLINE(Result SerializeObject(Handle<Object> obj)) { | 96 INLINE(Result SerializeObject(Handle<Object> obj)) { |
97 return Serialize_<false>(obj, false, factory_->empty_string()); | 97 return Serialize_<false>(obj, false, factory_->empty_string()); |
98 } | 98 } |
99 | 99 |
100 // Serialize an array element. | 100 // Serialize an array element. |
101 // The index may serve as argument for the toJSON function. | 101 // The index may serve as argument for the toJSON function. |
102 INLINE(Result SerializeElement(Isolate* isolate, | 102 INLINE(Result SerializeElement(Isolate* isolate, |
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288 static const int kJsonQuoteWorstCaseBlowup = 6; | 288 static const int kJsonQuoteWorstCaseBlowup = 6; |
289 static const int kSpaceForQuotes = 2; | 289 static const int kSpaceForQuotes = 2; |
290 int worst_case_length = | 290 int worst_case_length = |
291 object->length() * kJsonQuoteWorstCaseBlowup + kSpaceForQuotes; | 291 object->length() * kJsonQuoteWorstCaseBlowup + kSpaceForQuotes; |
292 | 292 |
293 if (worst_case_length > 32 * KB) { // Slow path if too large. | 293 if (worst_case_length > 32 * KB) { // Slow path if too large. |
294 BasicJsonStringifier stringifier(isolate); | 294 BasicJsonStringifier stringifier(isolate); |
295 return stringifier.Stringify(object); | 295 return stringifier.Stringify(object); |
296 } | 296 } |
297 | 297 |
298 object = FlattenGetString(object); | 298 FlattenString(object); |
299 if (object->IsSeqOneByteString()) { | 299 String::FlatContent flat = object->GetFlatContent(); |
| 300 if (flat.IsAscii()) { |
300 return StringifyString_<SeqOneByteString>( | 301 return StringifyString_<SeqOneByteString>( |
301 isolate, | 302 isolate, |
302 object, | 303 flat.ToOneByteVector(), |
303 isolate->factory()->NewRawOneByteString(worst_case_length)); | 304 isolate->factory()->NewRawOneByteString(worst_case_length)); |
304 } else { | 305 } else { |
305 return StringifyString_<SeqTwoByteString>( | 306 return StringifyString_<SeqTwoByteString>( |
306 isolate, | 307 isolate, |
307 object, | 308 flat.ToUC16Vector(), |
308 isolate->factory()->NewRawTwoByteString(worst_case_length)); | 309 isolate->factory()->NewRawTwoByteString(worst_case_length)); |
309 } | 310 } |
310 } | 311 } |
311 | 312 |
312 | 313 |
313 template <typename StringType> | 314 template <typename ResultType, typename Char> |
314 MaybeObject* BasicJsonStringifier::StringifyString_(Isolate* isolate, | 315 MaybeObject* BasicJsonStringifier::StringifyString_(Isolate* isolate, |
315 Handle<String> string, | 316 Vector<Char> vector, |
316 Handle<String> result) { | 317 Handle<String> result) { |
317 AssertNoAllocation no_allocation; | 318 AssertNoAllocation no_allocation; |
318 int final_size = 0; | 319 int final_size = 0; |
319 StringType* dest = StringType::cast(*result); | 320 ResultType* dest = ResultType::cast(*result); |
320 dest->Set(final_size++, '\"'); | 321 dest->Set(final_size++, '\"'); |
321 final_size += SerializeStringUnchecked_(StringType::cast(*string)->GetChars(), | 322 final_size += SerializeStringUnchecked_(vector.start(), |
322 dest->GetChars() + 1, | 323 dest->GetChars() + 1, |
323 string->length()); | 324 vector.length()); |
324 dest->Set(final_size++, '\"'); | 325 dest->Set(final_size++, '\"'); |
325 if (isolate->heap()->InNewSpace(*result)) { | 326 if (isolate->heap()->InNewSpace(*result)) { |
326 // In new space, simply lower the allocation top to fit the actual size. | 327 // In new space, simply lower the allocation top to fit the actual size. |
327 isolate->heap()->new_space()->ShrinkStringAtAllocationBoundary<StringType>( | 328 isolate->heap()->new_space()->ShrinkStringAtAllocationBoundary<ResultType>( |
328 *result, final_size); | 329 *result, final_size); |
329 return *result; | 330 return *result; |
330 } else { | 331 } else { |
331 // Not in new space, need to fill the wasted space with filler objects. | 332 // Not in new space, need to fill the wasted space with filler objects. |
332 return SeqString::cast(*result)->Truncate(final_size); | 333 return SeqString::cast(*result)->Truncate(final_size); |
333 } | 334 } |
334 } | 335 } |
335 | 336 |
336 | 337 |
337 template <bool is_ascii, typename Char> | 338 template <bool is_ascii, typename Char> |
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840 SerializeString_<false, uint8_t>(object); | 841 SerializeString_<false, uint8_t>(object); |
841 } else { | 842 } else { |
842 SerializeString_<false, uc16>(object); | 843 SerializeString_<false, uc16>(object); |
843 } | 844 } |
844 } | 845 } |
845 } | 846 } |
846 | 847 |
847 } } // namespace v8::internal | 848 } } // namespace v8::internal |
848 | 849 |
849 #endif // V8_JSON_STRINGIFIER_H_ | 850 #endif // V8_JSON_STRINGIFIER_H_ |
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