blob: e12e1d027055d6337402499ee6cb8c1e8d4be265 [file] [log] [blame]
* Copyright (C) 2019 The Android Open Source Project
* 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#pragma once
#include <optional>
#include <string>
#include <string_view>
namespace android::incremental::path {
namespace details {
class CStrWrapper {
CStrWrapper(std::string_view sv);
CStrWrapper(const CStrWrapper&) = delete;
void operator=(const CStrWrapper&) = delete;
CStrWrapper(CStrWrapper&&) = delete;
void operator=(CStrWrapper&&) = delete;
const char* get() const { return mCstr; }
operator const char*() const { return get(); }
const char* mCstr;
std::optional<std::string> mCopy;
void append_next_path(std::string& res, std::string_view c);
} // namespace details
// An std::map<> comparator that makes all nested paths to be ordered before the parents.
struct PathCharsLess {
bool operator()(char l, char r) const;
struct PathLess {
using is_transparent = void;
bool operator()(std::string_view l, std::string_view r) const;
// Returns a zero-terminated version of a passed string view
// Only makes a copy if it wasn't zero-terminated already
// Useful for passing string view parameters to system functions.
inline details::CStrWrapper c_str(std::string_view sv) {
return {sv};
std::string_view relativize(std::string_view parent, std::string_view nested);
inline std::string_view relativize(const char* parent, const char* nested) {
return relativize(std::string_view(parent), std::string_view(nested));
inline std::string_view relativize(std::string_view parent, const char* nested) {
return relativize(parent, std::string_view(nested));
inline std::string_view relativize(const char* parent, std::string_view nested) {
return relativize(std::string_view(parent), nested);
std::string_view relativize(std::string&& parent, std::string_view nested) = delete;
std::string_view relativize(std::string_view parent, std::string&& nested) = delete;
bool isAbsolute(std::string_view path);
std::string normalize(std::string_view path);
std::string_view dirname(std::string_view path);
std::string_view basename(std::string_view path);
std::optional<bool> isEmptyDir(std::string_view dir);
bool startsWith(std::string_view path, std::string_view prefix);
template <class... Paths>
std::string join(std::string&& first, std::string_view second, Paths&&... paths) {
std::string& result = first;
using std::size;
result.reserve(first.size() + second.size() + 1 + (sizeof...(paths) + ... + size(paths)));
(details::append_next_path(result, second), ...,
details::append_next_path(result, std::forward<Paths>(paths)));
return std::move(result);
template <class... Paths>
std::string join(std::string_view first, std::string_view second, Paths&&... paths) {
return path::join(std::string(), first, second, std::forward<Paths>(paths)...);
template <class... Paths>
std::string join(const char* first, std::string_view second, Paths&&... paths) {
return path::join(std::string_view(first), second, std::forward<Paths>(paths)...);
} // namespace android::incremental::path