1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "util/BigBuffer.h" 18 19 #include <algorithm> 20 #include <memory> 21 #include <vector> 22 23 namespace aapt { 24 25 void* BigBuffer::nextBlockImpl(size_t size) { 26 if (!mBlocks.empty()) { 27 Block& block = mBlocks.back(); 28 if (block.mBlockSize - block.size >= size) { 29 void* outBuffer = block.buffer.get() + block.size; 30 block.size += size; 31 mSize += size; 32 return outBuffer; 33 } 34 } 35 36 const size_t actualSize = std::max(mBlockSize, size); 37 38 Block block = {}; 39 40 // Zero-allocate the block's buffer. 41 block.buffer = std::unique_ptr<uint8_t[]>(new uint8_t[actualSize]()); 42 assert(block.buffer); 43 44 block.size = size; 45 block.mBlockSize = actualSize; 46 47 mBlocks.push_back(std::move(block)); 48 mSize += size; 49 return mBlocks.back().buffer.get(); 50 } 51 52 } // namespace aapt 53
