// Copyright 2014 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "src/snapshot/snapshot-source-sink.h" #include "src/base/logging.h" #include "src/handles-inl.h" #include "src/snapshot/serialize.h" // for SerializerDeserializer::nop() namespace v8 { namespace internal { void SnapshotByteSource::CopyRaw(byte* to, int number_of_bytes) { memcpy(to, data_ + position_, number_of_bytes); position_ += number_of_bytes; } void SnapshotByteSink::PutInt(uintptr_t integer, const char* description) { DCHECK(integer < 1 << 30); integer <<= 2; int bytes = 1; if (integer > 0xff) bytes = 2; if (integer > 0xffff) bytes = 3; if (integer > 0xffffff) bytes = 4; integer |= (bytes - 1); Put(static_cast<int>(integer & 0xff), "IntPart1"); if (bytes > 1) Put(static_cast<int>((integer >> 8) & 0xff), "IntPart2"); if (bytes > 2) Put(static_cast<int>((integer >> 16) & 0xff), "IntPart3"); if (bytes > 3) Put(static_cast<int>((integer >> 24) & 0xff), "IntPart4"); } void SnapshotByteSink::PutRaw(const byte* data, int number_of_bytes, const char* description) { data_.AddAll(Vector<byte>(const_cast<byte*>(data), number_of_bytes)); } bool SnapshotByteSource::AtEOF() { if (0u + length_ - position_ > 2 * sizeof(uint32_t)) return false; for (int x = position_; x < length_; x++) { if (data_[x] != SerializerDeserializer::nop()) return false; } return true; } bool SnapshotByteSource::GetBlob(const byte** data, int* number_of_bytes) { int size = GetInt(); *number_of_bytes = size; if (position_ + size <= length_) { *data = &data_[position_]; Advance(size); return true; } else { Advance(length_ - position_); // proceed until end. return false; } } } // namespace internal } // namespace v8