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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.
*/
#include "util/BigBuffer.h"
#include <algorithm>
#include <memory>
#include <vector>
#include "android-base/logging.h"
namespace aapt {
void* BigBuffer::NextBlockImpl(size_t size) {
if (!blocks_.empty()) {
Block& block = blocks_.back();
if (block.block_size_ - block.size >= size) {
void* out_buffer = block.buffer.get() + block.size;
block.size += size;
size_ += size;
return out_buffer;
}
}
const size_t actual_size = std::max(block_size_, size);
Block block = {};
// Zero-allocate the block's buffer.
block.buffer = std::unique_ptr<uint8_t[]>(new uint8_t[actual_size]());
CHECK(block.buffer);
block.size = size;
block.block_size_ = actual_size;
blocks_.push_back(std::move(block));
size_ += size;
return blocks_.back().buffer.get();
}
void* BigBuffer::NextBlock(size_t* out_size) {
if (!blocks_.empty()) {
Block& block = blocks_.back();
if (block.size != block.block_size_) {
void* out_buffer = block.buffer.get() + block.size;
size_t size = block.block_size_ - block.size;
block.size = block.block_size_;
size_ += size;
*out_size = size;
return out_buffer;
}
}
// Zero-allocate the block's buffer.
Block block = {};
block.buffer = std::unique_ptr<uint8_t[]>(new uint8_t[block_size_]());
CHECK(block.buffer);
block.size = block_size_;
block.block_size_ = block_size_;
blocks_.push_back(std::move(block));
size_ += block_size_;
*out_size = block_size_;
return blocks_.back().buffer.get();
}
std::string BigBuffer::to_string() const {
std::string result;
for (const Block& block : blocks_) {
result.append(block.buffer.get(), block.buffer.get() + block.size);
}
return result;
}
} // namespace aapt
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