mirror of
https://github.com/nestriness/cdc-file-transfer.git
synced 2026-01-30 19:35:36 +02:00
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
|
|
//
|
|
// 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 "common/buffer.h"
|
|
|
|
#include <cstring>
|
|
#include <utility>
|
|
|
|
namespace cdc_ft {
|
|
|
|
Buffer::Buffer() = default;
|
|
|
|
Buffer::Buffer(size_t size) : size_(size) {
|
|
reserve(size);
|
|
resize(size);
|
|
}
|
|
|
|
Buffer::Buffer(std::initializer_list<char> list) {
|
|
reserve(list.size());
|
|
resize(list.size());
|
|
memcpy(data_, list.begin(), list.size());
|
|
}
|
|
|
|
Buffer::Buffer(Buffer&& other) noexcept { *this = std::move(other); }
|
|
|
|
Buffer& Buffer::operator=(Buffer&& other) noexcept {
|
|
if (data_) {
|
|
free(data_);
|
|
}
|
|
|
|
size_ = other.size_;
|
|
capacity_ = other.capacity_;
|
|
data_ = other.data_;
|
|
|
|
other.size_ = 0;
|
|
other.capacity_ = 0;
|
|
other.data_ = nullptr;
|
|
|
|
return *this;
|
|
}
|
|
|
|
Buffer::~Buffer() {
|
|
if (data_) {
|
|
free(data_);
|
|
data_ = nullptr;
|
|
capacity_ = 0;
|
|
}
|
|
}
|
|
|
|
bool Buffer::operator==(const Buffer& other) const {
|
|
return size_ == other.size_ && memcmp(data_, other.data_, size_) == 0;
|
|
}
|
|
|
|
bool Buffer::operator!=(const Buffer& other) const { return !(*this == other); }
|
|
|
|
void Buffer::resize(size_t new_size) {
|
|
size_ = new_size;
|
|
if (capacity_ < size_) {
|
|
capacity_ = size_ + size_ / 2;
|
|
data_ = static_cast<char*>(realloc(data_, capacity_));
|
|
}
|
|
}
|
|
|
|
void Buffer::reserve(size_t capacity) {
|
|
if (capacity_ < capacity) {
|
|
capacity_ = capacity;
|
|
data_ = static_cast<char*>(realloc(data_, capacity_));
|
|
}
|
|
}
|
|
|
|
void Buffer::append(const void* data, size_t data_size) {
|
|
size_t prev_size = size_;
|
|
resize(prev_size + data_size);
|
|
memcpy(data_ + prev_size, data, data_size);
|
|
}
|
|
|
|
} // namespace cdc_ft
|