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Diffstat (limited to 'src/common/fs/fs.h')
-rw-r--r-- | src/common/fs/fs.h | 582 |
1 files changed, 582 insertions, 0 deletions
diff --git a/src/common/fs/fs.h b/src/common/fs/fs.h new file mode 100644 index 0000000000..f6f2563490 --- /dev/null +++ b/src/common/fs/fs.h @@ -0,0 +1,582 @@ +// Copyright 2021 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include <filesystem> +#include <memory> + +#include "common/fs/fs_types.h" +#include "common/fs/fs_util.h" + +namespace Common::FS { + +class IOFile; + +// File Operations + +/** + * Creates a new file at path with the specified size. + * + * Failures occur when: + * - Input path is not valid + * - The input path's parent directory does not exist + * - Filesystem object at path exists + * - Filesystem at path is read only + * + * @param path Filesystem path + * @param size File size + * + * @returns True if the file creation succeeds, false otherwise. + */ +[[nodiscard]] bool NewFile(const std::filesystem::path& path, u64 size = 0); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] bool NewFile(const Path& path, u64 size = 0) { + if constexpr (IsChar<typename Path::value_type>) { + return NewFile(ToU8String(path), size); + } else { + return NewFile(std::filesystem::path{path}, size); + } +} +#endif + +/** + * Removes a file at path. + * + * Failures occur when: + * - Input path is not valid + * - Filesystem object at path is not a file + * - Filesystem at path is read only + * + * @param path Filesystem path + * + * @returns True if file removal succeeds or file does not exist, false otherwise. + */ +[[nodiscard]] bool RemoveFile(const std::filesystem::path& path); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] bool RemoveFile(const Path& path) { + if constexpr (IsChar<typename Path::value_type>) { + return RemoveFile(ToU8String(path)); + } else { + return RemoveFile(std::filesystem::path{path}); + } +} +#endif + +/** + * Renames a file from old_path to new_path. + * + * Failures occur when: + * - One or both input path(s) is not valid + * - Filesystem object at old_path does not exist + * - Filesystem object at old_path is not a file + * - Filesystem object at new_path exists + * - Filesystem at either path is read only + * + * @param old_path Old filesystem path + * @param new_path New filesystem path + * + * @returns True if file rename succeeds, false otherwise. + */ +[[nodiscard]] bool RenameFile(const std::filesystem::path& old_path, + const std::filesystem::path& new_path); + +#ifdef _WIN32 +template <typename Path1, typename Path2> +[[nodiscard]] bool RenameFile(const Path1& old_path, const Path2& new_path) { + using ValueType1 = typename Path1::value_type; + using ValueType2 = typename Path2::value_type; + if constexpr (IsChar<ValueType1> && IsChar<ValueType2>) { + return RenameFile(ToU8String(old_path), ToU8String(new_path)); + } else if constexpr (IsChar<ValueType1> && !IsChar<ValueType2>) { + return RenameFile(ToU8String(old_path), new_path); + } else if constexpr (!IsChar<ValueType1> && IsChar<ValueType2>) { + return RenameFile(old_path, ToU8String(new_path)); + } else { + return RenameFile(std::filesystem::path{old_path}, std::filesystem::path{new_path}); + } +} +#endif + +/** + * Opens a file at path with the specified file access mode. + * This function behaves differently depending on the FileAccessMode. + * These behaviors are documented in each enum value of FileAccessMode. + * + * Failures occur when: + * - Input path is not valid + * - Filesystem object at path is not a file + * - The file is not opened + * + * @param path Filesystem path + * @param mode File access mode + * @param type File type, default is BinaryFile. Use TextFile to open the file as a text file + * @param flag (Windows only) File-share access flag, default is ShareReadOnly + * + * @returns A shared pointer to the opened file. Returns nullptr on failure. + */ +[[nodiscard]] std::shared_ptr<IOFile> FileOpen(const std::filesystem::path& path, + FileAccessMode mode, + FileType type = FileType::BinaryFile, + FileShareFlag flag = FileShareFlag::ShareReadOnly); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] std::shared_ptr<IOFile> FileOpen(const Path& path, FileAccessMode mode, + FileType type = FileType::BinaryFile, + FileShareFlag flag = FileShareFlag::ShareReadOnly) { + if constexpr (IsChar<typename Path::value_type>) { + return FileOpen(ToU8String(path), mode, type, flag); + } else { + return FileOpen(std::filesystem::path{path}, mode, type, flag); + } +} +#endif + +// Directory Operations + +/** + * Creates a directory at path. + * Note that this function will *always* assume that the input path is a directory. For example, + * if the input path is /path/to/directory/file.txt, it will create a directory called "file.txt". + * If you intend to create the parent directory of a file, use CreateParentDir instead. + * + * Failures occur when: + * - Input path is not valid + * - The input path's parent directory does not exist + * - Filesystem at path is read only + * + * @param path Filesystem path + * + * @returns True if directory creation succeeds or directory already exists, false otherwise. + */ +[[nodiscard]] bool CreateDir(const std::filesystem::path& path); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] bool CreateDir(const Path& path) { + if constexpr (IsChar<typename Path::value_type>) { + return CreateDir(ToU8String(path)); + } else { + return CreateDir(std::filesystem::path{path}); + } +} +#endif + +/** + * Recursively creates a directory at path. + * Note that this function will *always* assume that the input path is a directory. For example, + * if the input path is /path/to/directory/file.txt, it will create a directory called "file.txt". + * If you intend to create the parent directory of a file, use CreateParentDirs instead. + * Unlike CreateDir, this creates all of input path's parent directories if they do not exist. + * + * Failures occur when: + * - Input path is not valid + * - Filesystem at path is read only + * + * @param path Filesystem path + * + * @returns True if directory creation succeeds or directory already exists, false otherwise. + */ +[[nodiscard]] bool CreateDirs(const std::filesystem::path& path); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] bool CreateDirs(const Path& path) { + if constexpr (IsChar<typename Path::value_type>) { + return CreateDirs(ToU8String(path)); + } else { + return CreateDirs(std::filesystem::path{path}); + } +} +#endif + +/** + * Creates the parent directory of a given path. + * This function calls CreateDir(path.parent_path()), see CreateDir for more details. + * + * @param path Filesystem path + * + * @returns True if directory creation succeeds or directory already exists, false otherwise. + */ +[[nodiscard]] bool CreateParentDir(const std::filesystem::path& path); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] bool CreateParentDir(const Path& path) { + if constexpr (IsChar<typename Path::value_type>) { + return CreateParentDir(ToU8String(path)); + } else { + return CreateParentDir(std::filesystem::path{path}); + } +} +#endif + +/** + * Recursively creates the parent directory of a given path. + * This function calls CreateDirs(path.parent_path()), see CreateDirs for more details. + * + * @param path Filesystem path + * + * @returns True if directory creation succeeds or directory already exists, false otherwise. + */ +[[nodiscard]] bool CreateParentDirs(const std::filesystem::path& path); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] bool CreateParentDirs(const Path& path) { + if constexpr (IsChar<typename Path::value_type>) { + return CreateParentDirs(ToU8String(path)); + } else { + return CreateParentDirs(std::filesystem::path{path}); + } +} +#endif + +/** + * Removes a directory at path. + * + * Failures occur when: + * - Input path is not valid + * - Filesystem object at path is not a directory + * - The given directory is not empty + * - Filesystem at path is read only + * + * @param path Filesystem path + * + * @returns True if directory removal succeeds or directory does not exist, false otherwise. + */ +[[nodiscard]] bool RemoveDir(const std::filesystem::path& path); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] bool RemoveDir(const Path& path) { + if constexpr (IsChar<typename Path::value_type>) { + return RemoveDir(ToU8String(path)); + } else { + return RemoveDir(std::filesystem::path{path}); + } +} +#endif + +/** + * Removes all the contents within the given directory and removes the directory itself. + * + * Failures occur when: + * - Input path is not valid + * - Filesystem object at path is not a directory + * - Filesystem at path is read only + * + * @param path Filesystem path + * + * @returns True if the directory and all of its contents are removed successfully, false otherwise. + */ +[[nodiscard]] bool RemoveDirRecursively(const std::filesystem::path& path); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] bool RemoveDirRecursively(const Path& path) { + if constexpr (IsChar<typename Path::value_type>) { + return RemoveDirRecursively(ToU8String(path)); + } else { + return RemoveDirRecursively(std::filesystem::path{path}); + } +} +#endif + +/** + * Removes all the contents within the given directory without removing the directory itself. + * + * Failures occur when: + * - Input path is not valid + * - Filesystem object at path is not a directory + * - Filesystem at path is read only + * + * @param path Filesystem path + * + * @returns True if all of the directory's contents are removed successfully, false otherwise. + */ +[[nodiscard]] bool RemoveDirContentsRecursively(const std::filesystem::path& path); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] bool RemoveDirContentsRecursively(const Path& path) { + if constexpr (IsChar<typename Path::value_type>) { + return RemoveDirContentsRecursively(ToU8String(path)); + } else { + return RemoveDirContentsRecursively(std::filesystem::path{path}); + } +} +#endif + +/** + * Renames a directory from old_path to new_path. + * + * Failures occur when: + * - One or both input path(s) is not valid + * - Filesystem object at old_path does not exist + * - Filesystem object at old_path is not a directory + * - Filesystem object at new_path exists + * - Filesystem at either path is read only + * + * @param old_path Old filesystem path + * @param new_path New filesystem path + * + * @returns True if directory rename succeeds, false otherwise. + */ +[[nodiscard]] bool RenameDir(const std::filesystem::path& old_path, + const std::filesystem::path& new_path); + +#ifdef _WIN32 +template <typename Path1, typename Path2> +[[nodiscard]] bool RenameDir(const Path1& old_path, const Path2& new_path) { + using ValueType1 = typename Path1::value_type; + using ValueType2 = typename Path2::value_type; + if constexpr (IsChar<ValueType1> && IsChar<ValueType2>) { + return RenameDir(ToU8String(old_path), ToU8String(new_path)); + } else if constexpr (IsChar<ValueType1> && !IsChar<ValueType2>) { + return RenameDir(ToU8String(old_path), new_path); + } else if constexpr (!IsChar<ValueType1> && IsChar<ValueType2>) { + return RenameDir(old_path, ToU8String(new_path)); + } else { + return RenameDir(std::filesystem::path{old_path}, std::filesystem::path{new_path}); + } +} +#endif + +/** + * Iterates over the directory entries of a given directory. + * This does not iterate over the sub-directories of the given directory. + * The DirEntryCallable callback is called for each visited directory entry. + * A filter can be set to control which directory entries are visited based on their type. + * By default, both files and directories are visited. + * If the callback returns false or there is an error, the iteration is immediately halted. + * + * Failures occur when: + * - Input path is not valid + * - Filesystem object at path is not a directory + * + * @param path Filesystem path + * @param callback Callback to be called for each visited directory entry + * @param filter Directory entry type filter + */ +void IterateDirEntries(const std::filesystem::path& path, const DirEntryCallable& callback, + DirEntryFilter filter = DirEntryFilter::All); + +#ifdef _WIN32 +template <typename Path> +void IterateDirEntries(const Path& path, const DirEntryCallable& callback, + DirEntryFilter filter = DirEntryFilter::All) { + if constexpr (IsChar<typename Path::value_type>) { + IterateDirEntries(ToU8String(path), callback, filter); + } else { + IterateDirEntries(std::filesystem::path{path}, callback, filter); + } +} +#endif + +/** + * Iterates over the directory entries of a given directory and its sub-directories. + * The DirEntryCallable callback is called for each visited directory entry. + * A filter can be set to control which directory entries are visited based on their type. + * By default, both files and directories are visited. + * If the callback returns false or there is an error, the iteration is immediately halted. + * + * Failures occur when: + * - Input path is not valid + * - Filesystem object at path does not exist + * - Filesystem object at path is not a directory + * + * @param path Filesystem path + * @param callback Callback to be called for each visited directory entry + * @param filter Directory entry type filter + */ +void IterateDirEntriesRecursively(const std::filesystem::path& path, + const DirEntryCallable& callback, + DirEntryFilter filter = DirEntryFilter::All); + +#ifdef _WIN32 +template <typename Path> +void IterateDirEntriesRecursively(const Path& path, const DirEntryCallable& callback, + DirEntryFilter filter = DirEntryFilter::All) { + if constexpr (IsChar<typename Path::value_type>) { + IterateDirEntriesRecursively(ToU8String(path), callback, filter); + } else { + IterateDirEntriesRecursively(std::filesystem::path{path}, callback, filter); + } +} +#endif + +// Generic Filesystem Operations + +/** + * Returns whether a filesystem object at path exists. + * + * @param path Filesystem path + * + * @returns True if a filesystem object at path exists, false otherwise. + */ +[[nodiscard]] bool Exists(const std::filesystem::path& path); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] bool Exists(const Path& path) { + if constexpr (IsChar<typename Path::value_type>) { + return Exists(ToU8String(path)); + } else { + return Exists(std::filesystem::path{path}); + } +} +#endif + +/** + * Returns whether a filesystem object at path is a file. + * + * @param path Filesystem path + * + * @returns True if a filesystem object at path is a file, false otherwise. + */ +[[nodiscard]] bool IsFile(const std::filesystem::path& path); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] bool IsFile(const Path& path) { + if constexpr (IsChar<typename Path::value_type>) { + return IsFile(ToU8String(path)); + } else { + return IsFile(std::filesystem::path{path}); + } +} +#endif + +/** + * Returns whether a filesystem object at path is a directory. + * + * @param path Filesystem path + * + * @returns True if a filesystem object at path is a directory, false otherwise. + */ +[[nodiscard]] bool IsDir(const std::filesystem::path& path); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] bool IsDir(const Path& path) { + if constexpr (IsChar<typename Path::value_type>) { + return IsDir(ToU8String(path)); + } else { + return IsDir(std::filesystem::path{path}); + } +} +#endif + +/** + * Gets the current working directory. + * + * @returns The current working directory. Returns an empty path on failure. + */ +[[nodiscard]] std::filesystem::path GetCurrentDir(); + +/** + * Sets the current working directory to path. + * + * @returns True if the current working directory is successfully set, false otherwise. + */ +[[nodiscard]] bool SetCurrentDir(const std::filesystem::path& path); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] bool SetCurrentDir(const Path& path) { + if constexpr (IsChar<typename Path::value_type>) { + return SetCurrentDir(ToU8String(path)); + } else { + return SetCurrentDir(std::filesystem::path{path}); + } +} +#endif + +/** + * Gets the entry type of the filesystem object at path. + * + * @param path Filesystem path + * + * @returns The entry type of the filesystem object. Returns file_type::not_found on failure. + */ +[[nodiscard]] std::filesystem::file_type GetEntryType(const std::filesystem::path& path); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] std::filesystem::file_type GetEntryType(const Path& path) { + if constexpr (IsChar<typename Path::value_type>) { + return GetEntryType(ToU8String(path)); + } else { + return GetEntryType(std::filesystem::path{path}); + } +} +#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 |