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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 | 5 | 
| 6 #include "src/snapshot-source-sink.h" | 6 #include "src/snapshot-source-sink.h" | 
| 7 | 7 | 
| 8 #include "src/base/logging.h" | 8 #include "src/base/logging.h" | 
| 9 #include "src/handles-inl.h" | 9 #include "src/handles-inl.h" | 
| 10 #include "src/serialize.h"  // for SerializerDeserializer::nop() in AtEOF() | 10 #include "src/serialize.h"  // for SerializerDeserializer::nop() in AtEOF() | 
| 11 | 11 | 
| 12 | 12 | 
| 13 namespace v8 { | 13 namespace v8 { | 
| 14 namespace internal { | 14 namespace internal { | 
| 15 | 15 | 
| 16 | 16 | 
| 17 SnapshotByteSource::SnapshotByteSource(const byte* array, int length) | 17 SnapshotByteSource::SnapshotByteSource(const byte* array, int length) | 
| 18     : data_(array), length_(length), position_(0) { | 18     : data_(array), length_(length), position_(0) { | 
| 19 } | 19 } | 
| 20 | 20 | 
| 21 | 21 | 
| 22 SnapshotByteSource::~SnapshotByteSource() { } | 22 SnapshotByteSource::~SnapshotByteSource() { } | 
| 23 | 23 | 
| 24 | 24 | 
| 25 int32_t SnapshotByteSource::GetUnalignedInt() { | 25 int32_t SnapshotByteSource::GetUnalignedInt() { | 
| 26   ASSERT(position_ < length_);  // Require at least one byte left. | 26   DCHECK(position_ < length_);  // Require at least one byte left. | 
| 27 #if defined(V8_HOST_CAN_READ_UNALIGNED) &&  __BYTE_ORDER == __LITTLE_ENDIAN | 27 #if defined(V8_HOST_CAN_READ_UNALIGNED) &&  __BYTE_ORDER == __LITTLE_ENDIAN | 
| 28   int32_t answer = *reinterpret_cast<const int32_t*>(data_ + position_); | 28   int32_t answer = *reinterpret_cast<const int32_t*>(data_ + position_); | 
| 29 #else | 29 #else | 
| 30   int32_t answer = data_[position_]; | 30   int32_t answer = data_[position_]; | 
| 31   answer |= data_[position_ + 1] << 8; | 31   answer |= data_[position_ + 1] << 8; | 
| 32   answer |= data_[position_ + 2] << 16; | 32   answer |= data_[position_ + 2] << 16; | 
| 33   answer |= data_[position_ + 3] << 24; | 33   answer |= data_[position_ + 3] << 24; | 
| 34 #endif | 34 #endif | 
| 35   return answer; | 35   return answer; | 
| 36 } | 36 } | 
| 37 | 37 | 
| 38 | 38 | 
| 39 void SnapshotByteSource::CopyRaw(byte* to, int number_of_bytes) { | 39 void SnapshotByteSource::CopyRaw(byte* to, int number_of_bytes) { | 
| 40   MemCopy(to, data_ + position_, number_of_bytes); | 40   MemCopy(to, data_ + position_, number_of_bytes); | 
| 41   position_ += number_of_bytes; | 41   position_ += number_of_bytes; | 
| 42 } | 42 } | 
| 43 | 43 | 
| 44 | 44 | 
| 45 void SnapshotByteSink::PutInt(uintptr_t integer, const char* description) { | 45 void SnapshotByteSink::PutInt(uintptr_t integer, const char* description) { | 
| 46   ASSERT(integer < 1 << 22); | 46   DCHECK(integer < 1 << 22); | 
| 47   integer <<= 2; | 47   integer <<= 2; | 
| 48   int bytes = 1; | 48   int bytes = 1; | 
| 49   if (integer > 0xff) bytes = 2; | 49   if (integer > 0xff) bytes = 2; | 
| 50   if (integer > 0xffff) bytes = 3; | 50   if (integer > 0xffff) bytes = 3; | 
| 51   integer |= bytes; | 51   integer |= bytes; | 
| 52   Put(static_cast<int>(integer & 0xff), "IntPart1"); | 52   Put(static_cast<int>(integer & 0xff), "IntPart1"); | 
| 53   if (bytes > 1) Put(static_cast<int>((integer >> 8) & 0xff), "IntPart2"); | 53   if (bytes > 1) Put(static_cast<int>((integer >> 8) & 0xff), "IntPart2"); | 
| 54   if (bytes > 2) Put(static_cast<int>((integer >> 16) & 0xff), "IntPart3"); | 54   if (bytes > 2) Put(static_cast<int>((integer >> 16) & 0xff), "IntPart3"); | 
| 55 } | 55 } | 
| 56 | 56 | 
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| 92 } | 92 } | 
| 93 | 93 | 
| 94 | 94 | 
| 95 void DebugSnapshotSink::Put(byte b, const char* description) { | 95 void DebugSnapshotSink::Put(byte b, const char* description) { | 
| 96   PrintF("%24s: %x\n", description, b); | 96   PrintF("%24s: %x\n", description, b); | 
| 97   sink_->Put(b, description); | 97   sink_->Put(b, description); | 
| 98 } | 98 } | 
| 99 | 99 | 
| 100 }  // namespace v8::internal | 100 }  // namespace v8::internal | 
| 101 }  // namespace v8 | 101 }  // namespace v8 | 
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