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Issue 16729002: build fix for 15023 (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 7 years, 6 months ago
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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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4296 4296
4297 4297
4298 bool String::IsOneByte() const { 4298 bool String::IsOneByte() const {
4299 i::Handle<i::String> str = Utils::OpenHandle(this); 4299 i::Handle<i::String> str = Utils::OpenHandle(this);
4300 if (IsDeadCheck(str->GetIsolate(), "v8::String::IsOneByte()")) { 4300 if (IsDeadCheck(str->GetIsolate(), "v8::String::IsOneByte()")) {
4301 return false; 4301 return false;
4302 } 4302 }
4303 return str->HasOnlyOneByteChars(); 4303 return str->HasOnlyOneByteChars();
4304 } 4304 }
4305 4305
4306 // Helpers for ContainsOnlyOneByteHelper
4307 template<size_t size> struct OneByteMask;
4308 template<> struct OneByteMask<4> {
4309 static const uint32_t value = 0xFF00FF00;
4310 };
4311 template<> struct OneByteMask<8> {
4312 static const uint64_t value = 0xFF00FF00FF00FF00;
4313 };
4314 static const uintptr_t kOneByteMask = OneByteMask<sizeof(uintptr_t)>::value;
4315 static const uintptr_t kAlignmentMask = sizeof(uintptr_t) - 1;
4316 static inline bool Unaligned(const uint16_t* chars) {
4317 return reinterpret_cast<const uintptr_t>(chars) & kAlignmentMask;
4318 }
4319 static inline const uint16_t* Align(const uint16_t* chars) {
4320 return reinterpret_cast<uint16_t*>(
4321 reinterpret_cast<uintptr_t>(chars) & ~kAlignmentMask);
4322 }
4306 4323
4307 class ContainsOnlyOneByteHelper { 4324 class ContainsOnlyOneByteHelper {
4308 public: 4325 public:
4309 ContainsOnlyOneByteHelper() : is_one_byte_(true) {} 4326 ContainsOnlyOneByteHelper() : is_one_byte_(true) {}
4310 bool Check(i::String* string) { 4327 bool Check(i::String* string) {
4311 i::ConsString* cons_string = i::String::VisitFlat(this, string, 0); 4328 i::ConsString* cons_string = i::String::VisitFlat(this, string, 0);
4312 if (cons_string == NULL) return is_one_byte_; 4329 if (cons_string == NULL) return is_one_byte_;
4313 return CheckCons(cons_string); 4330 return CheckCons(cons_string);
4314 } 4331 }
4315 void VisitOneByteString(const uint8_t* chars, int length) { 4332 void VisitOneByteString(const uint8_t* chars, int length) {
(...skipping 25 matching lines...) Expand all
4341 } 4358 }
4342 // Read the rest. 4359 // Read the rest.
4343 while (chars != end) { 4360 while (chars != end) {
4344 acc |= *chars++; 4361 acc |= *chars++;
4345 } 4362 }
4346 // Check result. 4363 // Check result.
4347 if ((acc & kOneByteMask) != 0) is_one_byte_ = false; 4364 if ((acc & kOneByteMask) != 0) is_one_byte_ = false;
4348 } 4365 }
4349 4366
4350 private: 4367 private:
4351 static const uintptr_t kOneByteMask =
4352 static_cast<uintptr_t>(0xFF00FF00FF00FF00ULL);
4353 static const uintptr_t kAlignmentMask = sizeof(uintptr_t) - 1;
4354 static inline bool Unaligned(const uint16_t* chars) {
4355 return reinterpret_cast<const uintptr_t>(chars) & kAlignmentMask;
4356 }
4357 static inline const uint16_t* Align(const uint16_t* chars) {
4358 return reinterpret_cast<uint16_t*>(
4359 reinterpret_cast<uintptr_t>(chars) & ~kAlignmentMask);
4360 }
4361 bool CheckCons(i::ConsString* cons_string) { 4368 bool CheckCons(i::ConsString* cons_string) {
4362 while (true) { 4369 while (true) {
4363 // Check left side if flat. 4370 // Check left side if flat.
4364 i::String* left = cons_string->first(); 4371 i::String* left = cons_string->first();
4365 i::ConsString* left_as_cons = 4372 i::ConsString* left_as_cons =
4366 i::String::VisitFlat(this, left, 0); 4373 i::String::VisitFlat(this, left, 0);
4367 if (!is_one_byte_) return false; 4374 if (!is_one_byte_) return false;
4368 // Check right side if flat. 4375 // Check right side if flat.
4369 i::String* right = cons_string->second(); 4376 i::String* right = cons_string->second();
4370 i::ConsString* right_as_cons = 4377 i::ConsString* right_as_cons =
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7988 7995
7989 v->VisitPointers(blocks_.first(), first_block_limit_); 7996 v->VisitPointers(blocks_.first(), first_block_limit_);
7990 7997
7991 for (int i = 1; i < blocks_.length(); i++) { 7998 for (int i = 1; i < blocks_.length(); i++) {
7992 v->VisitPointers(blocks_[i], &blocks_[i][kHandleBlockSize]); 7999 v->VisitPointers(blocks_[i], &blocks_[i][kHandleBlockSize]);
7993 } 8000 }
7994 } 8001 }
7995 8002
7996 8003
7997 } } // namespace v8::internal 8004 } } // namespace v8::internal
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