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88 lines
2.3 KiB
88 lines
2.3 KiB
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "util/BigBuffer.h"
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#include <algorithm>
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#include <memory>
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#include <vector>
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#include "android-base/logging.h"
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namespace aapt {
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void* BigBuffer::NextBlockImpl(size_t size) {
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if (!blocks_.empty()) {
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Block& block = blocks_.back();
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if (block.block_size_ - block.size >= size) {
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void* out_buffer = block.buffer.get() + block.size;
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block.size += size;
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size_ += size;
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return out_buffer;
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}
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}
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const size_t actual_size = std::max(block_size_, size);
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Block block = {};
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// Zero-allocate the block's buffer.
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block.buffer = std::unique_ptr<uint8_t[]>(new uint8_t[actual_size]());
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CHECK(block.buffer);
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block.size = size;
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block.block_size_ = actual_size;
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blocks_.push_back(std::move(block));
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size_ += size;
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return blocks_.back().buffer.get();
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}
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void* BigBuffer::NextBlock(size_t* out_size) {
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if (!blocks_.empty()) {
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Block& block = blocks_.back();
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if (block.size != block.block_size_) {
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void* out_buffer = block.buffer.get() + block.size;
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size_t size = block.block_size_ - block.size;
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block.size = block.block_size_;
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size_ += size;
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*out_size = size;
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return out_buffer;
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}
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}
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// Zero-allocate the block's buffer.
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Block block = {};
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block.buffer = std::unique_ptr<uint8_t[]>(new uint8_t[block_size_]());
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CHECK(block.buffer);
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block.size = block_size_;
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block.block_size_ = block_size_;
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blocks_.push_back(std::move(block));
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size_ += block_size_;
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*out_size = block_size_;
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return blocks_.back().buffer.get();
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}
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std::string BigBuffer::to_string() const {
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std::string result;
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for (const Block& block : blocks_) {
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result.append(block.buffer.get(), block.buffer.get() + block.size);
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}
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return result;
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}
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} // namespace aapt
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