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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef AAPT_FORMAT_BINARY_CHUNKWRITER_H
#define AAPT_FORMAT_BINARY_CHUNKWRITER_H
#include "android-base/macros.h"
#include "androidfw/ResourceTypes.h"
#include "util/BigBuffer.h"
#include "util/Util.h"
namespace aapt {
class ChunkWriter {
public:
explicit inline ChunkWriter(BigBuffer* buffer) : buffer_(buffer) {
}
ChunkWriter(ChunkWriter&&) = default;
ChunkWriter& operator=(ChunkWriter&&) = default;
template <typename T>
inline T* StartChunk(uint16_t type) {
start_size_ = buffer_->size();
T* chunk = buffer_->NextBlock<T>();
header_ = &chunk->header;
header_->type = util::HostToDevice16(type);
header_->headerSize = util::HostToDevice16(sizeof(T));
return chunk;
}
template <typename T>
inline T* NextBlock(size_t count = 1) {
return buffer_->NextBlock<T>(count);
}
inline BigBuffer* buffer() {
return buffer_;
}
inline android::ResChunk_header* chunk_header() {
return header_;
}
inline size_t size() {
return buffer_->size() - start_size_;
}
inline android::ResChunk_header* Finish() {
buffer_->Align4();
header_->size = util::HostToDevice32(buffer_->size() - start_size_);
return header_;
}
private:
DISALLOW_COPY_AND_ASSIGN(ChunkWriter);
BigBuffer* buffer_;
size_t start_size_ = 0;
android::ResChunk_header* header_ = nullptr;
};
template <>
inline android::ResChunk_header* ChunkWriter::StartChunk(uint16_t type) {
start_size_ = buffer_->size();
header_ = buffer_->NextBlock<android::ResChunk_header>();
header_->type = util::HostToDevice16(type);
header_->headerSize = util::HostToDevice16(sizeof(android::ResChunk_header));
return header_;
}
} // namespace aapt
#endif /* AAPT_FORMAT_BINARY_CHUNKWRITER_H */
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