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https://github.com/nestriness/cdc-file-transfer.git
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4326e972ac
The tools allow efficient and fast synchronization of large directory trees from a Windows workstation to a Linux target machine. cdc_rsync* support efficient copy of files by using content-defined chunking (CDC) to identify chunks within files that can be reused. asset_stream_manager + cdc_fuse_fs support efficient streaming of a local directory to a remote virtual file system based on FUSE. It also employs CDC to identify and reuse unchanged data chunks.
89 lines
2.1 KiB
C++
89 lines
2.1 KiB
C++
// Copyright 2022 Google LLC
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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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#include "common/buffer.h"
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#include <cstring>
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#include <utility>
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namespace cdc_ft {
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Buffer::Buffer() = default;
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Buffer::Buffer(size_t size) : size_(size) {
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reserve(size);
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resize(size);
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}
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Buffer::Buffer(std::initializer_list<char> list) {
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reserve(list.size());
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resize(list.size());
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memcpy(data_, list.begin(), list.size());
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}
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Buffer::Buffer(Buffer&& other) noexcept { *this = std::move(other); }
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Buffer& Buffer::operator=(Buffer&& other) noexcept {
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if (data_) {
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free(data_);
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}
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size_ = other.size_;
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capacity_ = other.capacity_;
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data_ = other.data_;
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other.size_ = 0;
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other.capacity_ = 0;
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other.data_ = nullptr;
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return *this;
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}
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Buffer::~Buffer() {
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if (data_) {
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free(data_);
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data_ = nullptr;
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capacity_ = 0;
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}
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}
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bool Buffer::operator==(const Buffer& other) const {
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return size_ == other.size_ && memcmp(data_, other.data_, size_) == 0;
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}
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bool Buffer::operator!=(const Buffer& other) const { return !(*this == other); }
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void Buffer::resize(size_t new_size) {
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size_ = new_size;
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if (capacity_ < size_) {
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capacity_ = size_ + size_ / 2;
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data_ = static_cast<char*>(realloc(data_, capacity_));
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}
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}
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void Buffer::reserve(size_t capacity) {
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if (capacity_ < capacity) {
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capacity_ = capacity;
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data_ = static_cast<char*>(realloc(data_, capacity_));
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}
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}
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void Buffer::append(const void* data, size_t data_size) {
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size_t prev_size = size_;
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resize(prev_size + data_size);
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memcpy(data_ + prev_size, data, data_size);
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}
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} // namespace cdc_ft
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