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114 lines
3.6 KiB
114 lines
3.6 KiB
/*
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* Copyright (C) 2019 The Android Open Source Project
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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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*/
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#pragma once
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#include <optional>
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#include <string>
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#include <string_view>
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namespace android::incremental::path {
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namespace details {
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class CStrWrapper {
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public:
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CStrWrapper(std::string_view sv);
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CStrWrapper(const CStrWrapper&) = delete;
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void operator=(const CStrWrapper&) = delete;
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CStrWrapper(CStrWrapper&&) = delete;
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void operator=(CStrWrapper&&) = delete;
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const char* get() const { return mCstr; }
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operator const char*() const { return get(); }
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private:
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const char* mCstr;
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std::optional<std::string> mCopy;
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};
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void append_next_path(std::string& res, std::string_view c);
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} // namespace details
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//
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// An std::map<> comparator that makes all nested paths to be ordered before the parents.
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//
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struct PathCharsLess {
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bool operator()(char l, char r) const;
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};
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struct PathLess {
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using is_transparent = void;
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bool operator()(std::string_view l, std::string_view r) const;
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};
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//
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// Returns a zero-terminated version of a passed string view
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// Only makes a copy if it wasn't zero-terminated already
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// Useful for passing string view parameters to system functions.
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//
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inline details::CStrWrapper c_str(std::string_view sv) {
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return {sv};
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}
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std::string_view relativize(std::string_view parent, std::string_view nested);
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inline std::string_view relativize(const char* parent, const char* nested) {
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return relativize(std::string_view(parent), std::string_view(nested));
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}
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inline std::string_view relativize(std::string_view parent, const char* nested) {
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return relativize(parent, std::string_view(nested));
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}
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inline std::string_view relativize(const char* parent, std::string_view nested) {
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return relativize(std::string_view(parent), nested);
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}
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std::string_view relativize(std::string&& parent, std::string_view nested) = delete;
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std::string_view relativize(std::string_view parent, std::string&& nested) = delete;
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bool isAbsolute(std::string_view path);
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std::string normalize(std::string_view path);
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std::string_view dirname(std::string_view path);
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std::string_view basename(std::string_view path);
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std::optional<bool> isEmptyDir(std::string_view dir);
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bool startsWith(std::string_view path, std::string_view prefix);
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template <class... Paths>
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std::string join(std::string&& first, std::string_view second, Paths&&... paths) {
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std::string& result = first;
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{
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using std::size;
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result.reserve(first.size() + second.size() + 1 + (sizeof...(paths) + ... + size(paths)));
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}
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(details::append_next_path(result, second), ...,
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details::append_next_path(result, std::forward<Paths>(paths)));
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return std::move(result);
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}
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template <class... Paths>
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std::string join(std::string_view first, std::string_view second, Paths&&... paths) {
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return path::join(std::string(), first, second, std::forward<Paths>(paths)...);
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}
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template <class... Paths>
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std::string join(const char* first, std::string_view second, Paths&&... paths) {
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return path::join(std::string_view(first), second, std::forward<Paths>(paths)...);
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}
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} // namespace android::incremental::path
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