584 lines
18 KiB
C++
584 lines
18 KiB
C++
// Copyright 2021 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <filesystem>
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#include <memory>
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#include "common/fs/fs_types.h"
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#include "common/fs/fs_util.h"
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namespace Common::FS {
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class IOFile;
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// File Operations
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/**
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* Creates a new file at path with the specified size.
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*
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* Failures occur when:
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* - Input path is not valid
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* - The input path's parent directory does not exist
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* - Filesystem object at path exists
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* - Filesystem at path is read only
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*
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* @param path Filesystem path
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* @param size File size
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*
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* @returns True if the file creation succeeds, false otherwise.
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*/
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[[nodiscard]] bool NewFile(const std::filesystem::path& path, u64 size = 0);
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#ifdef _WIN32
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template <typename Path>
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[[nodiscard]] bool NewFile(const Path& path, u64 size = 0) {
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if constexpr (IsChar<typename Path::value_type>) {
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return NewFile(ToU8String(path), size);
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} else {
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return NewFile(std::filesystem::path{path}, size);
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}
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}
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#endif
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/**
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* Removes a file at path.
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*
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* Failures occur when:
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* - Input path is not valid
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* - Filesystem object at path is not a regular file
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* - Filesystem at path is read only
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*
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* @param path Filesystem path
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*
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* @returns True if file removal succeeds or file does not exist, false otherwise.
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*/
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bool RemoveFile(const std::filesystem::path& path);
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#ifdef _WIN32
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template <typename Path>
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bool RemoveFile(const Path& path) {
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if constexpr (IsChar<typename Path::value_type>) {
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return RemoveFile(ToU8String(path));
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} else {
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return RemoveFile(std::filesystem::path{path});
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}
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}
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#endif
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/**
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* Renames a file from old_path to new_path.
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*
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* Failures occur when:
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* - One or both input path(s) is not valid
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* - Filesystem object at old_path does not exist
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* - Filesystem object at old_path is not a regular file
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* - Filesystem object at new_path exists
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* - Filesystem at either path is read only
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*
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* @param old_path Old filesystem path
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* @param new_path New filesystem path
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*
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* @returns True if file rename succeeds, false otherwise.
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*/
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[[nodiscard]] bool RenameFile(const std::filesystem::path& old_path,
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const std::filesystem::path& new_path);
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#ifdef _WIN32
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template <typename Path1, typename Path2>
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[[nodiscard]] bool RenameFile(const Path1& old_path, const Path2& new_path) {
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using ValueType1 = typename Path1::value_type;
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using ValueType2 = typename Path2::value_type;
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if constexpr (IsChar<ValueType1> && IsChar<ValueType2>) {
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return RenameFile(ToU8String(old_path), ToU8String(new_path));
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} else if constexpr (IsChar<ValueType1> && !IsChar<ValueType2>) {
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return RenameFile(ToU8String(old_path), new_path);
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} else if constexpr (!IsChar<ValueType1> && IsChar<ValueType2>) {
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return RenameFile(old_path, ToU8String(new_path));
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} else {
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return RenameFile(std::filesystem::path{old_path}, std::filesystem::path{new_path});
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}
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}
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#endif
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/**
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* Opens a file at path with the specified file access mode.
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* This function behaves differently depending on the FileAccessMode.
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* These behaviors are documented in each enum value of FileAccessMode.
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*
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* Failures occur when:
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* - Input path is not valid
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* - Filesystem object at path exists and is not a regular file
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* - The file is not open
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*
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* @param path Filesystem path
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* @param mode File access mode
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* @param type File type, default is BinaryFile. Use TextFile to open the file as a text file
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* @param flag (Windows only) File-share access flag, default is ShareReadOnly
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*
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* @returns A shared pointer to the opened file. Returns nullptr on failure.
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*/
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[[nodiscard]] std::shared_ptr<IOFile> FileOpen(const std::filesystem::path& path,
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FileAccessMode mode,
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FileType type = FileType::BinaryFile,
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FileShareFlag flag = FileShareFlag::ShareReadOnly);
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#ifdef _WIN32
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template <typename Path>
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[[nodiscard]] std::shared_ptr<IOFile> FileOpen(const Path& path, FileAccessMode mode,
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FileType type = FileType::BinaryFile,
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FileShareFlag flag = FileShareFlag::ShareReadOnly) {
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if constexpr (IsChar<typename Path::value_type>) {
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return FileOpen(ToU8String(path), mode, type, flag);
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} else {
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return FileOpen(std::filesystem::path{path}, mode, type, flag);
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}
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}
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#endif
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// Directory Operations
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/**
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* Creates a directory at path.
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* Note that this function will *always* assume that the input path is a directory. For example,
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* if the input path is /path/to/directory/file.txt, it will create a directory called "file.txt".
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* If you intend to create the parent directory of a file, use CreateParentDir instead.
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*
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* Failures occur when:
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* - Input path is not valid
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* - The input path's parent directory does not exist
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* - Filesystem at path is read only
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*
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* @param path Filesystem path
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*
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* @returns True if directory creation succeeds or directory already exists, false otherwise.
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*/
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[[nodiscard]] bool CreateDir(const std::filesystem::path& path);
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#ifdef _WIN32
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template <typename Path>
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[[nodiscard]] bool CreateDir(const Path& path) {
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if constexpr (IsChar<typename Path::value_type>) {
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return CreateDir(ToU8String(path));
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} else {
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return CreateDir(std::filesystem::path{path});
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}
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}
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#endif
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/**
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* Recursively creates a directory at path.
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* Note that this function will *always* assume that the input path is a directory. For example,
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* if the input path is /path/to/directory/file.txt, it will create a directory called "file.txt".
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* If you intend to create the parent directory of a file, use CreateParentDirs instead.
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* Unlike CreateDir, this creates all of input path's parent directories if they do not exist.
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*
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* Failures occur when:
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* - Input path is not valid
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* - Filesystem at path is read only
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*
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* @param path Filesystem path
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*
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* @returns True if directory creation succeeds or directory already exists, false otherwise.
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*/
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[[nodiscard]] bool CreateDirs(const std::filesystem::path& path);
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#ifdef _WIN32
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template <typename Path>
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[[nodiscard]] bool CreateDirs(const Path& path) {
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if constexpr (IsChar<typename Path::value_type>) {
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return CreateDirs(ToU8String(path));
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} else {
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return CreateDirs(std::filesystem::path{path});
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}
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}
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#endif
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/**
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* Creates the parent directory of a given path.
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* This function calls CreateDir(path.parent_path()), see CreateDir for more details.
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*
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* @param path Filesystem path
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*
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* @returns True if directory creation succeeds or directory already exists, false otherwise.
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*/
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[[nodiscard]] bool CreateParentDir(const std::filesystem::path& path);
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#ifdef _WIN32
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template <typename Path>
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[[nodiscard]] bool CreateParentDir(const Path& path) {
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if constexpr (IsChar<typename Path::value_type>) {
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return CreateParentDir(ToU8String(path));
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} else {
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return CreateParentDir(std::filesystem::path{path});
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}
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}
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#endif
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/**
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* Recursively creates the parent directory of a given path.
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* This function calls CreateDirs(path.parent_path()), see CreateDirs for more details.
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*
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* @param path Filesystem path
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*
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* @returns True if directory creation succeeds or directory already exists, false otherwise.
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*/
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[[nodiscard]] bool CreateParentDirs(const std::filesystem::path& path);
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#ifdef _WIN32
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template <typename Path>
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[[nodiscard]] bool CreateParentDirs(const Path& path) {
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if constexpr (IsChar<typename Path::value_type>) {
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return CreateParentDirs(ToU8String(path));
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} else {
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return CreateParentDirs(std::filesystem::path{path});
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}
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}
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#endif
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/**
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* Removes a directory at path.
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*
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* Failures occur when:
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* - Input path is not valid
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* - Filesystem object at path is not a directory
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* - The given directory is not empty
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* - Filesystem at path is read only
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*
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* @param path Filesystem path
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*
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* @returns True if directory removal succeeds or directory does not exist, false otherwise.
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*/
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bool RemoveDir(const std::filesystem::path& path);
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#ifdef _WIN32
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template <typename Path>
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bool RemoveDir(const Path& path) {
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if constexpr (IsChar<typename Path::value_type>) {
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return RemoveDir(ToU8String(path));
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} else {
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return RemoveDir(std::filesystem::path{path});
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}
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}
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#endif
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/**
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* Removes all the contents within the given directory and removes the directory itself.
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*
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* Failures occur when:
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* - Input path is not valid
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* - Filesystem object at path is not a directory
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* - Filesystem at path is read only
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*
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* @param path Filesystem path
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*
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* @returns True if the directory and all of its contents are removed successfully, false otherwise.
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*/
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bool RemoveDirRecursively(const std::filesystem::path& path);
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#ifdef _WIN32
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template <typename Path>
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bool RemoveDirRecursively(const Path& path) {
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if constexpr (IsChar<typename Path::value_type>) {
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return RemoveDirRecursively(ToU8String(path));
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} else {
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return RemoveDirRecursively(std::filesystem::path{path});
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}
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}
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#endif
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/**
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* Removes all the contents within the given directory without removing the directory itself.
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*
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* Failures occur when:
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* - Input path is not valid
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* - Filesystem object at path is not a directory
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* - Filesystem at path is read only
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*
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* @param path Filesystem path
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*
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* @returns True if all of the directory's contents are removed successfully, false otherwise.
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*/
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bool RemoveDirContentsRecursively(const std::filesystem::path& path);
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#ifdef _WIN32
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template <typename Path>
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bool RemoveDirContentsRecursively(const Path& path) {
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if constexpr (IsChar<typename Path::value_type>) {
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return RemoveDirContentsRecursively(ToU8String(path));
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} else {
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return RemoveDirContentsRecursively(std::filesystem::path{path});
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}
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}
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#endif
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/**
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* Renames a directory from old_path to new_path.
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*
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* Failures occur when:
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* - One or both input path(s) is not valid
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* - Filesystem object at old_path does not exist
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* - Filesystem object at old_path is not a directory
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* - Filesystem object at new_path exists
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* - Filesystem at either path is read only
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*
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* @param old_path Old filesystem path
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* @param new_path New filesystem path
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*
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* @returns True if directory rename succeeds, false otherwise.
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*/
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[[nodiscard]] bool RenameDir(const std::filesystem::path& old_path,
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const std::filesystem::path& new_path);
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#ifdef _WIN32
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template <typename Path1, typename Path2>
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[[nodiscard]] bool RenameDir(const Path1& old_path, const Path2& new_path) {
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using ValueType1 = typename Path1::value_type;
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using ValueType2 = typename Path2::value_type;
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if constexpr (IsChar<ValueType1> && IsChar<ValueType2>) {
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return RenameDir(ToU8String(old_path), ToU8String(new_path));
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} else if constexpr (IsChar<ValueType1> && !IsChar<ValueType2>) {
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return RenameDir(ToU8String(old_path), new_path);
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} else if constexpr (!IsChar<ValueType1> && IsChar<ValueType2>) {
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return RenameDir(old_path, ToU8String(new_path));
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} else {
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return RenameDir(std::filesystem::path{old_path}, std::filesystem::path{new_path});
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}
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}
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#endif
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/**
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* Iterates over the directory entries of a given directory.
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* This does not iterate over the sub-directories of the given directory.
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* The DirEntryCallable callback is called for each visited directory entry.
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* A filter can be set to control which directory entries are visited based on their type.
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* By default, both files and directories are visited.
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* If the callback returns false or there is an error, the iteration is immediately halted.
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*
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* Failures occur when:
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* - Input path is not valid
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* - Filesystem object at path is not a directory
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*
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* @param path Filesystem path
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* @param callback Callback to be called for each visited directory entry
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* @param filter Directory entry type filter
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*/
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void IterateDirEntries(const std::filesystem::path& path, const DirEntryCallable& callback,
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DirEntryFilter filter = DirEntryFilter::All);
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#ifdef _WIN32
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template <typename Path>
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void IterateDirEntries(const Path& path, const DirEntryCallable& callback,
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DirEntryFilter filter = DirEntryFilter::All) {
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if constexpr (IsChar<typename Path::value_type>) {
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IterateDirEntries(ToU8String(path), callback, filter);
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} else {
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IterateDirEntries(std::filesystem::path{path}, callback, filter);
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}
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}
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#endif
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/**
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* Iterates over the directory entries of a given directory and its sub-directories.
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* The DirEntryCallable callback is called for each visited directory entry.
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* A filter can be set to control which directory entries are visited based on their type.
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* By default, both files and directories are visited.
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* If the callback returns false or there is an error, the iteration is immediately halted.
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*
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* Failures occur when:
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* - Input path is not valid
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* - Filesystem object at path does not exist
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* - Filesystem object at path is not a directory
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*
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* @param path Filesystem path
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* @param callback Callback to be called for each visited directory entry
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* @param filter Directory entry type filter
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*/
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void IterateDirEntriesRecursively(const std::filesystem::path& path,
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const DirEntryCallable& callback,
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DirEntryFilter filter = DirEntryFilter::All);
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#ifdef _WIN32
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template <typename Path>
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void IterateDirEntriesRecursively(const Path& path, const DirEntryCallable& callback,
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DirEntryFilter filter = DirEntryFilter::All) {
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if constexpr (IsChar<typename Path::value_type>) {
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IterateDirEntriesRecursively(ToU8String(path), callback, filter);
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} else {
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IterateDirEntriesRecursively(std::filesystem::path{path}, callback, filter);
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}
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}
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#endif
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// Generic Filesystem Operations
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/**
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* Returns whether a filesystem object at path exists.
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*
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* @param path Filesystem path
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*
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* @returns True if a filesystem object at path exists, false otherwise.
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*/
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[[nodiscard]] bool Exists(const std::filesystem::path& path);
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#ifdef _WIN32
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template <typename Path>
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[[nodiscard]] bool Exists(const Path& path) {
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if constexpr (IsChar<typename Path::value_type>) {
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return Exists(ToU8String(path));
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} else {
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return Exists(std::filesystem::path{path});
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}
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}
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#endif
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/**
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* Returns whether a filesystem object at path is a regular file.
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* A regular file is a file that stores text or binary data.
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* It is not a directory, symlink, FIFO, socket, block device, or character device.
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*
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* @param path Filesystem path
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*
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* @returns True if a filesystem object at path is a regular file, false otherwise.
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*/
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[[nodiscard]] bool IsFile(const std::filesystem::path& path);
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#ifdef _WIN32
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template <typename Path>
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[[nodiscard]] bool IsFile(const Path& path) {
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if constexpr (IsChar<typename Path::value_type>) {
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return IsFile(ToU8String(path));
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} else {
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return IsFile(std::filesystem::path{path});
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}
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}
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#endif
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/**
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* Returns whether a filesystem object at path is a directory.
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*
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* @param path Filesystem path
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*
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* @returns True if a filesystem object at path is a directory, false otherwise.
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*/
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[[nodiscard]] bool IsDir(const std::filesystem::path& path);
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#ifdef _WIN32
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template <typename Path>
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[[nodiscard]] bool IsDir(const Path& path) {
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if constexpr (IsChar<typename Path::value_type>) {
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return IsDir(ToU8String(path));
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} else {
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return IsDir(std::filesystem::path{path});
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}
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}
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#endif
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/**
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* Gets the current working directory.
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*
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* @returns The current working directory. Returns an empty path on failure.
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*/
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[[nodiscard]] std::filesystem::path GetCurrentDir();
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/**
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* Sets the current working directory to path.
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*
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* @returns True if the current working directory is successfully set, false otherwise.
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*/
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[[nodiscard]] bool SetCurrentDir(const std::filesystem::path& path);
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#ifdef _WIN32
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template <typename Path>
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[[nodiscard]] bool SetCurrentDir(const Path& path) {
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if constexpr (IsChar<typename Path::value_type>) {
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return SetCurrentDir(ToU8String(path));
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} else {
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return SetCurrentDir(std::filesystem::path{path});
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}
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}
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#endif
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/**
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* Gets the entry type of the filesystem object at path.
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*
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* @param path Filesystem path
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*
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* @returns The entry type of the filesystem object. Returns file_type::not_found on failure.
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*/
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[[nodiscard]] std::filesystem::file_type GetEntryType(const std::filesystem::path& path);
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#ifdef _WIN32
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template <typename Path>
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[[nodiscard]] std::filesystem::file_type GetEntryType(const Path& path) {
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if constexpr (IsChar<typename Path::value_type>) {
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return GetEntryType(ToU8String(path));
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} else {
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return GetEntryType(std::filesystem::path{path});
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}
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}
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#endif
|
|
|
|
/**
|
|
* Gets the size of the filesystem object at path.
|
|
*
|
|
* @param path Filesystem path
|
|
*
|
|
* @returns The size in bytes of the filesystem object. Returns 0 on failure.
|
|
*/
|
|
[[nodiscard]] u64 GetSize(const std::filesystem::path& path);
|
|
|
|
#ifdef _WIN32
|
|
template <typename Path>
|
|
[[nodiscard]] u64 GetSize(const Path& path) {
|
|
if constexpr (IsChar<typename Path::value_type>) {
|
|
return GetSize(ToU8String(path));
|
|
} else {
|
|
return GetSize(std::filesystem::path{path});
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* Gets the free space size of the filesystem at path.
|
|
*
|
|
* @param path Filesystem path
|
|
*
|
|
* @returns The free space size in bytes of the filesystem at path. Returns 0 on failure.
|
|
*/
|
|
[[nodiscard]] u64 GetFreeSpaceSize(const std::filesystem::path& path);
|
|
|
|
#ifdef _WIN32
|
|
template <typename Path>
|
|
[[nodiscard]] u64 GetFreeSpaceSize(const Path& path) {
|
|
if constexpr (IsChar<typename Path::value_type>) {
|
|
return GetFreeSpaceSize(ToU8String(path));
|
|
} else {
|
|
return GetFreeSpaceSize(std::filesystem::path{path});
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* Gets the total capacity of the filesystem at path.
|
|
*
|
|
* @param path Filesystem path
|
|
*
|
|
* @returns The total capacity in bytes of the filesystem at path. Returns 0 on failure.
|
|
*/
|
|
[[nodiscard]] u64 GetTotalSpaceSize(const std::filesystem::path& path);
|
|
|
|
#ifdef _WIN32
|
|
template <typename Path>
|
|
[[nodiscard]] u64 GetTotalSpaceSize(const Path& path) {
|
|
if constexpr (IsChar<typename Path::value_type>) {
|
|
return GetTotalSpaceSize(ToU8String(path));
|
|
} else {
|
|
return GetTotalSpaceSize(std::filesystem::path{path});
|
|
}
|
|
}
|
|
#endif
|
|
|
|
} // namespace Common::FS
|