mirror of
https://github.com/google/cdc-file-transfer.git
synced 2026-09-12 16:52:51 +03:00
Christian Schneider
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.
81 lines
2.1 KiB
C++
81 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/path_filter.h"
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namespace cdc_ft {
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namespace internal {
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bool IsMatch(const char* pattern, const char* path, size_t path_len) {
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for (/*empty*/; *pattern != '\0'; ++pattern) {
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switch (*pattern) {
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case '?':
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if (*path == '\0') {
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return false;
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}
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++path;
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break;
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case '*': {
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if (pattern[1] == '\0') {
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return true;
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}
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for (size_t n = 0; n < path_len; n++) {
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if (IsMatch(pattern + 1, path + n, path_len - n)) {
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return true;
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}
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}
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return false;
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}
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default:
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if (*path != *pattern) {
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return false;
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}
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++path;
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}
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}
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return *path == '\0';
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}
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bool IsMatch(const std::string& pattern, const std::string& path) {
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return IsMatch(pattern.c_str(), path.c_str(), path.size());
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}
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} // namespace internal
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PathFilter::PathFilter() = default;
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PathFilter::~PathFilter() = default;
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bool PathFilter::IsEmpty() const { return rules_.empty(); }
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void PathFilter::AddRule(Rule::Type type, std::string pattern) {
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rules_.emplace_back(type, std::move(pattern));
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}
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bool PathFilter::IsMatch(const std::string& path) const {
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for (const Rule& rule : rules_) {
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if (internal::IsMatch(rule.pattern.c_str(), path.c_str(), path.size())) {
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return rule.type == Rule::Type::kInclude;
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}
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}
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return true;
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}
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PathFilter::Rule::Rule(Type type, std::string pattern)
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: type(type), pattern(std::move(pattern)) {}
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} // namespace cdc_ft
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