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Copy pathpath.cc
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101 lines (84 loc) · 2.39 KB
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// Copyright 2018 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 "cc/file/path.h"
#include "absl/strings/match.h"
#include "absl/strings/str_cat.h"
namespace minigo {
namespace file {
#ifdef _WIN32
const char kSepChar = '\\';
const char kSepStr[2] = "\\";
#else
const char kSepChar = '/';
const char kSepStr[2] = "/";
#endif // _WIN32
namespace internal {
std::string JoinPathImpl(std::initializer_list<absl::string_view> paths) {
std::string result;
for (auto path : paths) {
if (path.empty()) {
continue;
}
if (result.empty()) {
result.assign(path.data(), path.size());
continue;
}
if (result.back() == kSepChar) {
if (path[0] == kSepChar) {
absl::StrAppend(&result, path.substr(1));
} else {
absl::StrAppend(&result, path);
}
} else {
if (path[0] == kSepChar) {
absl::StrAppend(&result, path);
} else {
absl::StrAppend(&result, kSepStr, path);
}
}
}
return result;
}
} // namespace internal
std::pair<absl::string_view, absl::string_view> SplitPath(
absl::string_view path) {
#ifdef _WIN32
auto pos = path.find_last_of("\\/");
#else
auto pos = path.find_last_of('/');
#endif
// No separator in path.
if (pos == absl::string_view::npos) {
return std::make_pair(path.substr(0, 0), path);
}
// Leading separator.
if (pos == 0) {
return std::make_pair(path.substr(0, 1), absl::ClippedSubstr(path, 1));
}
// General case.
return std::make_pair(path.substr(0, pos),
absl::ClippedSubstr(path, pos + 1));
}
std::string NormalizeSlashes(std::string path) {
char good = absl::StartsWith(path, "gs://") ? '/' : kSepChar;
char bad = good == '/' ? '\\' : '/';
for (size_t i = 0; i < path.size(); ++i) {
if (path[i] == bad) {
path[i] = good;
}
}
return path;
}
} // namespace file
} // namespace minigo