773f297738
R=vogelheim@chromium.org Review URL: https://codereview.chromium.org/1008923003 Cr-Commit-Position: refs/heads/master@{#27230}
68 lines
1.9 KiB
C++
68 lines
1.9 KiB
C++
// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "src/snapshot-source-sink.h"
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#include "src/base/logging.h"
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#include "src/handles-inl.h"
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#include "src/serialize.h" // for SerializerDeserializer::nop() in AtEOF()
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namespace v8 {
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namespace internal {
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void SnapshotByteSource::CopyRaw(byte* to, int number_of_bytes) {
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MemCopy(to, data_ + position_, number_of_bytes);
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position_ += number_of_bytes;
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}
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void SnapshotByteSink::PutInt(uintptr_t integer, const char* description) {
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DCHECK(integer < 1 << 30);
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integer <<= 2;
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int bytes = 1;
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if (integer > 0xff) bytes = 2;
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if (integer > 0xffff) bytes = 3;
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if (integer > 0xffffff) bytes = 4;
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integer |= (bytes - 1);
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Put(static_cast<int>(integer & 0xff), "IntPart1");
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if (bytes > 1) Put(static_cast<int>((integer >> 8) & 0xff), "IntPart2");
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if (bytes > 2) Put(static_cast<int>((integer >> 16) & 0xff), "IntPart3");
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if (bytes > 3) Put(static_cast<int>((integer >> 24) & 0xff), "IntPart4");
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}
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void SnapshotByteSink::PutRaw(const byte* data, int number_of_bytes,
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const char* description) {
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data_.AddAll(Vector<byte>(const_cast<byte*>(data), number_of_bytes));
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}
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bool SnapshotByteSource::AtEOF() {
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if (0u + length_ - position_ > 2 * sizeof(uint32_t)) return false;
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for (int x = position_; x < length_; x++) {
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if (data_[x] != SerializerDeserializer::nop()) return false;
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}
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return true;
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}
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bool SnapshotByteSource::GetBlob(const byte** data, int* number_of_bytes) {
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int size = GetInt();
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*number_of_bytes = size;
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if (position_ + size <= length_) {
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*data = &data_[position_];
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Advance(size);
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return true;
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} else {
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Advance(length_ - position_); // proceed until end.
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return false;
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}
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}
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} // namespace v8::internal
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} // namespace v8
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