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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/string-stream.h" | 5 #include "src/string-stream.h" |
6 | 6 |
7 #include "src/handles-inl.h" | 7 #include "src/handles-inl.h" |
8 | 8 |
9 namespace v8 { | 9 namespace v8 { |
10 namespace internal { | 10 namespace internal { |
11 | 11 |
12 static const int kMentionedObjectCacheMaxSize = 256; | 12 static const int kMentionedObjectCacheMaxSize = 256; |
13 | 13 |
14 char* HeapStringAllocator::allocate(unsigned bytes) { | 14 char* HeapStringAllocator::allocate(unsigned bytes) { |
15 space_ = NewArray<char>(bytes); | 15 space_ = NewArray<char>(bytes); |
16 return space_; | 16 return space_; |
17 } | 17 } |
18 | 18 |
19 | 19 |
20 NoAllocationStringAllocator::NoAllocationStringAllocator(char* memory, | |
21 unsigned size) { | |
22 size_ = size; | |
23 space_ = memory; | |
24 } | |
25 | |
26 | |
27 bool StringStream::Put(char c) { | 20 bool StringStream::Put(char c) { |
28 if (full()) return false; | 21 if (full()) return false; |
29 ASSERT(length_ < capacity_); | 22 ASSERT(length_ < capacity_); |
30 // Since the trailing '\0' is not accounted for in length_ fullness is | 23 // Since the trailing '\0' is not accounted for in length_ fullness is |
31 // indicated by a difference of 1 between length_ and capacity_. Thus when | 24 // indicated by a difference of 1 between length_ and capacity_. Thus when |
32 // reaching a difference of 2 we need to grow the buffer. | 25 // reaching a difference of 2 we need to grow the buffer. |
33 if (length_ == capacity_ - 2) { | 26 if (length_ == capacity_ - 2) { |
34 unsigned new_capacity = capacity_; | 27 unsigned new_capacity = capacity_; |
35 char* new_buffer = allocator_->grow(&new_capacity); | 28 char* new_buffer = allocator_->grow(&new_capacity); |
36 if (new_capacity > capacity_) { | 29 if (new_capacity > capacity_) { |
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548 return space_; | 541 return space_; |
549 } | 542 } |
550 MemCopy(new_space, space_, *bytes); | 543 MemCopy(new_space, space_, *bytes); |
551 *bytes = new_bytes; | 544 *bytes = new_bytes; |
552 DeleteArray(space_); | 545 DeleteArray(space_); |
553 space_ = new_space; | 546 space_ = new_space; |
554 return new_space; | 547 return new_space; |
555 } | 548 } |
556 | 549 |
557 | 550 |
558 // Only grow once to the maximum allowable size. | |
559 char* NoAllocationStringAllocator::grow(unsigned* bytes) { | |
560 ASSERT(size_ >= *bytes); | |
561 *bytes = size_; | |
562 return space_; | |
563 } | |
564 | |
565 | |
566 } } // namespace v8::internal | 551 } } // namespace v8::internal |
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