You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
55 lines
1.8 KiB
55 lines
1.8 KiB
/*
|
|
* Copyright (C) 2020 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.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <algorithm>
|
|
#include <memory>
|
|
|
|
// This class is used instead of std::string or std::vector because their clear(), erase(), etc
|
|
// functions don't actually deallocate. shrink_to_fit() does deallocate but is not guaranteed to
|
|
// work and swapping with an empty string/vector is clunky.
|
|
class SerializedData {
|
|
public:
|
|
SerializedData() {}
|
|
SerializedData(size_t size) : data_(new uint8_t[size]), size_(size) {}
|
|
|
|
void Resize(size_t new_size) {
|
|
if (size_ == 0) {
|
|
data_.reset(new uint8_t[new_size]);
|
|
size_ = new_size;
|
|
} else if (new_size == 0) {
|
|
data_.reset();
|
|
size_ = 0;
|
|
} else if (new_size != size_) {
|
|
std::unique_ptr<uint8_t[]> new_data(new uint8_t[new_size]);
|
|
size_t copy_size = std::min(size_, new_size);
|
|
memcpy(new_data.get(), data_.get(), copy_size);
|
|
data_.swap(new_data);
|
|
size_ = new_size;
|
|
}
|
|
}
|
|
|
|
uint8_t* data() { return data_.get(); }
|
|
const uint8_t* data() const { return data_.get(); }
|
|
size_t size() const { return size_; }
|
|
|
|
private:
|
|
std::unique_ptr<uint8_t[]> data_;
|
|
size_t size_ = 0;
|
|
}; |