diff options
Diffstat (limited to 'src/common/fs')
| -rw-r--r-- | src/common/fs/file.cpp | 392 | ||||
| -rw-r--r-- | src/common/fs/file.h | 450 | ||||
| -rw-r--r-- | src/common/fs/fs.cpp | 610 | ||||
| -rw-r--r-- | src/common/fs/fs.h | 582 | ||||
| -rw-r--r-- | src/common/fs/fs_paths.h | 27 | ||||
| -rw-r--r-- | src/common/fs/fs_types.h | 73 | ||||
| -rw-r--r-- | src/common/fs/fs_util.cpp | 13 | ||||
| -rw-r--r-- | src/common/fs/fs_util.h | 25 | ||||
| -rw-r--r-- | src/common/fs/path_util.cpp | 432 | ||||
| -rw-r--r-- | src/common/fs/path_util.h | 309 |
10 files changed, 2913 insertions, 0 deletions
diff --git a/src/common/fs/file.cpp b/src/common/fs/file.cpp new file mode 100644 index 000000000..9f3de1cb0 --- /dev/null +++ b/src/common/fs/file.cpp @@ -0,0 +1,392 @@ +// Copyright 2021 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include "common/fs/file.h" +#include "common/fs/fs.h" +#include "common/fs/path_util.h" +#include "common/logging/log.h" + +#ifdef _WIN32 +#include <io.h> +#include <share.h> +#else +#include <unistd.h> +#endif + +#ifdef _MSC_VER +#define fileno _fileno +#define fseeko _fseeki64 +#define ftello _ftelli64 +#endif + +namespace Common::FS { + +namespace fs = std::filesystem; + +namespace { + +#ifdef _WIN32 + +/** + * Converts the file access mode and file type enums to a file access mode wide string. + * + * @param mode File access mode + * @param type File type + * + * @returns A pointer to a wide string representing the file access mode. + */ +[[nodiscard]] constexpr const wchar_t* AccessModeToWStr(FileAccessMode mode, FileType type) { + switch (type) { + case FileType::BinaryFile: + switch (mode) { + case FileAccessMode::Read: + return L"rb"; + case FileAccessMode::Write: + return L"wb"; + case FileAccessMode::Append: + return L"ab"; + case FileAccessMode::ReadWrite: + return L"r+b"; + case FileAccessMode::ReadAppend: + return L"a+b"; + } + break; + case FileType::TextFile: + switch (mode) { + case FileAccessMode::Read: + return L"r"; + case FileAccessMode::Write: + return L"w"; + case FileAccessMode::Append: + return L"a"; + case FileAccessMode::ReadWrite: + return L"r+"; + case FileAccessMode::ReadAppend: + return L"a+"; + } + break; + } + + return L""; +} + +/** + * Converts the file-share access flag enum to a Windows defined file-share access flag. + * + * @param flag File-share access flag + * + * @returns Windows defined file-share access flag. + */ +[[nodiscard]] constexpr int ToWindowsFileShareFlag(FileShareFlag flag) { + switch (flag) { + case FileShareFlag::ShareNone: + default: + return _SH_DENYRW; + case FileShareFlag::ShareReadOnly: + return _SH_DENYWR; + case FileShareFlag::ShareWriteOnly: + return _SH_DENYRD; + case FileShareFlag::ShareReadWrite: + return _SH_DENYNO; + } +} + +#else + +/** + * Converts the file access mode and file type enums to a file access mode string. + * + * @param mode File access mode + * @param type File type + * + * @returns A pointer to a string representing the file access mode. + */ +[[nodiscard]] constexpr const char* AccessModeToStr(FileAccessMode mode, FileType type) { + switch (type) { + case FileType::BinaryFile: + switch (mode) { + case FileAccessMode::Read: + return "rb"; + case FileAccessMode::Write: + return "wb"; + case FileAccessMode::Append: + return "ab"; + case FileAccessMode::ReadWrite: + return "r+b"; + case FileAccessMode::ReadAppend: + return "a+b"; + } + break; + case FileType::TextFile: + switch (mode) { + case FileAccessMode::Read: + return "r"; + case FileAccessMode::Write: + return "w"; + case FileAccessMode::Append: + return "a"; + case FileAccessMode::ReadWrite: + return "r+"; + case FileAccessMode::ReadAppend: + return "a+"; + } + break; + } + + return ""; +} + +#endif + +/** + * Converts the seek origin enum to a seek origin integer. + * + * @param origin Seek origin + * + * @returns Seek origin integer. + */ +[[nodiscard]] constexpr int ToSeekOrigin(SeekOrigin origin) { + switch (origin) { + case SeekOrigin::SetOrigin: + default: + return SEEK_SET; + case SeekOrigin::CurrentPosition: + return SEEK_CUR; + case SeekOrigin::End: + return SEEK_END; + } +} + +} // Anonymous namespace + +std::string ReadStringFromFile(const std::filesystem::path& path, FileType type) { + if (!IsFile(path)) { + return ""; + } + + IOFile io_file{path, FileAccessMode::Read, type}; + + return io_file.ReadString(io_file.GetSize()); +} + +size_t WriteStringToFile(const std::filesystem::path& path, FileType type, + std::string_view string) { + if (!IsFile(path)) { + return 0; + } + + IOFile io_file{path, FileAccessMode::Write, type}; + + return io_file.WriteString(string); +} + +size_t AppendStringToFile(const std::filesystem::path& path, FileType type, + std::string_view string) { + if (!Exists(path)) { + return WriteStringToFile(path, type, string); + } + + if (!IsFile(path)) { + return 0; + } + + IOFile io_file{path, FileAccessMode::Append, type}; + + return io_file.WriteString(string); +} + +IOFile::IOFile() = default; + +IOFile::IOFile(const std::string& path, FileAccessMode mode, FileType type, FileShareFlag flag) { + Open(path, mode, type, flag); +} + +IOFile::IOFile(std::string_view path, FileAccessMode mode, FileType type, FileShareFlag flag) { + Open(path, mode, type, flag); +} + +IOFile::IOFile(const fs::path& path, FileAccessMode mode, FileType type, FileShareFlag flag) { + Open(path, mode, type, flag); +} + +IOFile::~IOFile() { + Close(); +} + +IOFile::IOFile(IOFile&& other) noexcept { + std::swap(file_path, other.file_path); + std::swap(file_access_mode, other.file_access_mode); + std::swap(file_type, other.file_type); + std::swap(file, other.file); +} + +IOFile& IOFile::operator=(IOFile&& other) noexcept { + std::swap(file_path, other.file_path); + std::swap(file_access_mode, other.file_access_mode); + std::swap(file_type, other.file_type); + std::swap(file, other.file); + return *this; +} + +fs::path IOFile::GetPath() const { + return file_path; +} + +FileAccessMode IOFile::GetAccessMode() const { + return file_access_mode; +} + +FileType IOFile::GetType() const { + return file_type; +} + +void IOFile::Open(const fs::path& path, FileAccessMode mode, FileType type, FileShareFlag flag) { + Close(); + + file_path = path; + file_access_mode = mode; + file_type = type; + + errno = 0; + +#ifdef _WIN32 + if (flag != FileShareFlag::ShareNone) { + file = _wfsopen(path.c_str(), AccessModeToWStr(mode, type), ToWindowsFileShareFlag(flag)); + } else { + _wfopen_s(&file, path.c_str(), AccessModeToWStr(mode, type)); + } +#else + file = std::fopen(path.c_str(), AccessModeToStr(mode, type)); +#endif + + if (!IsOpen()) { + const auto ec = std::error_code{errno, std::generic_category()}; + LOG_ERROR(Common_Filesystem, "Failed to open the file at path={}, ec_message={}", + PathToUTF8String(file_path), ec.message()); + } +} + +void IOFile::Close() { + if (!IsOpen()) { + return; + } + + errno = 0; + + const auto close_result = std::fclose(file) == 0; + + if (!close_result) { + const auto ec = std::error_code{errno, std::generic_category()}; + LOG_ERROR(Common_Filesystem, "Failed to close the file at path={}, ec_message={}", + PathToUTF8String(file_path), ec.message()); + } + + file = nullptr; +} + +bool IOFile::IsOpen() const { + return file != nullptr; +} + +std::string IOFile::ReadString(size_t length) const { + std::vector<char> string_buffer(length); + + const auto chars_read = ReadSpan<char>(string_buffer); + const auto string_size = chars_read != length ? chars_read : length; + + return std::string{string_buffer.data(), string_size}; +} + +size_t IOFile::WriteString(std::span<const char> string) const { + return WriteSpan(string); +} + +bool IOFile::Flush() const { + if (!IsOpen()) { + return false; + } + + errno = 0; + + const auto flush_result = std::fflush(file) == 0; + + if (!flush_result) { + const auto ec = std::error_code{errno, std::generic_category()}; + LOG_ERROR(Common_Filesystem, "Failed to flush the file at path={}, ec_message={}", + PathToUTF8String(file_path), ec.message()); + } + + return flush_result; +} + +bool IOFile::SetSize(u64 size) const { + if (!IsOpen()) { + return false; + } + + errno = 0; + +#ifdef _WIN32 + const auto set_size_result = _chsize_s(fileno(file), static_cast<s64>(size)) == 0; +#else + const auto set_size_result = ftruncate(fileno(file), static_cast<s64>(size)) == 0; +#endif + + if (!set_size_result) { + const auto ec = std::error_code{errno, std::generic_category()}; + LOG_ERROR(Common_Filesystem, "Failed to resize the file at path={}, size={}, ec_message={}", + PathToUTF8String(file_path), size, ec.message()); + } + + return set_size_result; +} + +u64 IOFile::GetSize() const { + if (!IsOpen()) { + return 0; + } + + std::error_code ec; + + const auto file_size = fs::file_size(file_path, ec); + + if (ec) { + LOG_ERROR(Common_Filesystem, "Failed to retrieve the file size of path={}, ec_message={}", + PathToUTF8String(file_path), ec.message()); + return 0; + } + + return file_size; +} + +bool IOFile::Seek(s64 offset, SeekOrigin origin) const { + if (!IsOpen()) { + return false; + } + + errno = 0; + + const auto seek_result = fseeko(file, offset, ToSeekOrigin(origin)) == 0; + + if (!seek_result) { + const auto ec = std::error_code{errno, std::generic_category()}; + LOG_ERROR(Common_Filesystem, + "Failed to seek the file at path={}, offset={}, origin={}, ec_message={}", + PathToUTF8String(file_path), offset, origin, ec.message()); + } + + return seek_result; +} + +s64 IOFile::Tell() const { + if (!IsOpen()) { + return 0; + } + + errno = 0; + + return ftello(file); +} + +} // namespace Common::FS diff --git a/src/common/fs/file.h b/src/common/fs/file.h new file mode 100644 index 000000000..209f9664b --- /dev/null +++ b/src/common/fs/file.h @@ -0,0 +1,450 @@ +// Copyright 2021 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include <cstdio> +#include <filesystem> +#include <fstream> +#include <span> +#include <type_traits> +#include <vector> + +#include "common/concepts.h" +#include "common/fs/fs_types.h" +#include "common/fs/fs_util.h" + +namespace Common::FS { + +enum class SeekOrigin { + SetOrigin, // Seeks from the start of the file. + CurrentPosition, // Seeks from the current file pointer position. + End, // Seeks from the end of the file. +}; + +/** + * Opens a file stream at path with the specified open mode. + * + * @param file_stream Reference to file stream + * @param path Filesystem path + * @param open_mode File stream open mode + */ +template <typename FileStream> +void OpenFileStream(FileStream& file_stream, const std::filesystem::path& path, + std::ios_base::openmode open_mode) { + file_stream.open(path, open_mode); +} + +#ifdef _WIN32 +template <typename FileStream, typename Path> +void OpenFileStream(FileStream& file_stream, const Path& path, std::ios_base::openmode open_mode) { + if constexpr (IsChar<typename Path::value_type>) { + file_stream.open(ToU8String(path), open_mode); + } else { + file_stream.open(std::filesystem::path{path}, open_mode); + } +} +#endif + +/** + * Reads an entire file at path and returns a string of the contents read from the file. + * If the filesystem object at path is not a file, this function returns an empty string. + * + * @param path Filesystem path + * @param type File type + * + * @returns A string of the contents read from the file. + */ +[[nodiscard]] std::string ReadStringFromFile(const std::filesystem::path& path, FileType type); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] std::string ReadStringFromFile(const Path& path, FileType type) { + if constexpr (IsChar<typename Path::value_type>) { + return ReadStringFromFile(ToU8String(path), type); + } else { + return ReadStringFromFile(std::filesystem::path{path}, type); + } +} +#endif + +/** + * Writes a string to a file at path and returns the number of characters successfully written. + * If an file already exists at path, its contents will be erased. + * If the filesystem object at path is not a file, this function returns 0. + * + * @param path Filesystem path + * @param type File type + * + * @returns Number of characters successfully written. + */ +[[nodiscard]] size_t WriteStringToFile(const std::filesystem::path& path, FileType type, + std::string_view string); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] size_t WriteStringToFile(const Path& path, FileType type, std::string_view string) { + if constexpr (IsChar<typename Path::value_type>) { + return WriteStringToFile(ToU8String(path), type, string); + } else { + return WriteStringToFile(std::filesystem::path{path}, type, string); + } +} +#endif + +/** + * Appends a string to a file at path and returns the number of characters successfully written. + * If a file does not exist at path, WriteStringToFile is called instead. + * If the filesystem object at path is not a file, this function returns 0. + * + * @param path Filesystem path + * @param type File type + * + * @returns Number of characters successfully written. + */ +[[nodiscard]] size_t AppendStringToFile(const std::filesystem::path& path, FileType type, + std::string_view string); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] size_t AppendStringToFile(const Path& path, FileType type, std::string_view string) { + if constexpr (IsChar<typename Path::value_type>) { + return AppendStringToFile(ToU8String(path), type, string); + } else { + return AppendStringToFile(std::filesystem::path{path}, type, string); + } +} +#endif + +class IOFile final : NonCopyable { +public: + IOFile(); + + explicit IOFile(const std::string& path, FileAccessMode mode, + FileType type = FileType::BinaryFile, + FileShareFlag flag = FileShareFlag::ShareReadOnly); + + explicit IOFile(std::string_view path, FileAccessMode mode, + FileType type = FileType::BinaryFile, + FileShareFlag flag = FileShareFlag::ShareReadOnly); + + /** + * An IOFile is a lightweight wrapper on C Library file operations. + * Automatically closes an open file on the destruction of an IOFile object. + * + * @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 + */ + explicit IOFile(const std::filesystem::path& path, FileAccessMode mode, + FileType type = FileType::BinaryFile, + FileShareFlag flag = FileShareFlag::ShareReadOnly); + + virtual ~IOFile(); + + IOFile(IOFile&& other) noexcept; + IOFile& operator=(IOFile&& other) noexcept; + + /** + * Gets the path of the file. + * + * @returns The path of the file. + */ + [[nodiscard]] std::filesystem::path GetPath() const; + + /** + * Gets the access mode of the file. + * + * @returns The access mode of the file. + */ + [[nodiscard]] FileAccessMode GetAccessMode() const; + + /** + * Gets the type of the file. + * + * @returns The type of the file. + */ + [[nodiscard]] FileType GetType() const; + + /** + * 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. + * + * @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 + */ + void Open(const std::filesystem::path& path, FileAccessMode mode, + FileType type = FileType::BinaryFile, + FileShareFlag flag = FileShareFlag::ShareReadOnly); + +#ifdef _WIN32 + template <typename Path> + [[nodiscard]] void Open(const Path& path, FileAccessMode mode, + FileType type = FileType::BinaryFile, + FileShareFlag flag = FileShareFlag::ShareReadOnly) { + using ValueType = typename Path::value_type; + if constexpr (IsChar<ValueType>) { + Open(ToU8String(path), mode, type, flag); + } else { + Open(std::filesystem::path{path}, mode, type, flag); + } + } +#endif + + /// Closes the file if it is opened. + void Close(); + + /** + * Checks whether the file is open. + * Use this to check whether the calls to Open() or Close() succeeded. + * + * @returns True if the file is open, false otherwise. + */ + [[nodiscard]] bool IsOpen() const; + + /** + * Helper function which deduces the value type of a contiguous STL container used in ReadSpan. + * If T is not a contiguous STL container as defined by the concept IsSTLContainer, this calls + * ReadObject and T must be a trivially copyable object. + * + * See ReadSpan for more details if T is a contiguous container. + * See ReadObject for more details if T is a trivially copyable object. + * + * @tparam T Contiguous container or trivially copyable object + * + * @param data Container of T::value_type data or reference to object + * + * @returns Count of T::value_type data or objects successfully read. + */ + template <typename T> + [[nodiscard]] size_t Read(T& data) const { + if constexpr (IsSTLContainer<T>) { + using ContiguousType = typename T::value_type; + static_assert(std::is_trivially_copyable_v<ContiguousType>, + "Data type must be trivially copyable."); + return ReadSpan<ContiguousType>(data); + } else { + return ReadObject(data) ? 1 : 0; + } + } + + /** + * Helper function which deduces the value type of a contiguous STL container used in WriteSpan. + * If T is not a contiguous STL container as defined by the concept IsSTLContainer, this calls + * WriteObject and T must be a trivially copyable object. + * + * See WriteSpan for more details if T is a contiguous container. + * See WriteObject for more details if T is a trivially copyable object. + * + * @tparam T Contiguous container or trivially copyable object + * + * @param data Container of T::value_type data or const reference to object + * + * @returns Count of T::value_type data or objects successfully written. + */ + template <typename T> + [[nodiscard]] size_t Write(const T& data) const { + if constexpr (IsSTLContainer<T>) { + using ContiguousType = typename T::value_type; + static_assert(std::is_trivially_copyable_v<ContiguousType>, + "Data type must be trivially copyable."); + return WriteSpan<ContiguousType>(data); + } else { + static_assert(std::is_trivially_copyable_v<T>, "Data type must be trivially copyable."); + return WriteObject(data) ? 1 : 0; + } + } + + /** + * Reads a span of T data from a file sequentially. + * This function reads from the current position of the file pointer and + * advances it by the (count of T * sizeof(T)) bytes successfully read. + * + * Failures occur when: + * - The file is not open + * - The opened file lacks read permissions + * - Attempting to read beyond the end-of-file + * + * @tparam T Data type + * + * @param data Span of T data + * + * @returns Count of T data successfully read. + */ + template <typename T> + [[nodiscard]] size_t ReadSpan(std::span<T> data) const { + static_assert(std::is_trivially_copyable_v<T>, "Data type must be trivially copyable."); + + if (!IsOpen()) { + return 0; + } + + return std::fread(data.data(), sizeof(T), data.size(), file); + } + + /** + * Writes a span of T data to a file sequentially. + * This function writes from the current position of the file pointer and + * advances it by the (count of T * sizeof(T)) bytes successfully written. + * + * Failures occur when: + * - The file is not open + * - The opened file lacks write permissions + * + * @tparam T Data type + * + * @param data Span of T data + * + * @returns Count of T data successfully written. + */ + template <typename T> + [[nodiscard]] size_t WriteSpan(std::span<const T> data) const { + static_assert(std::is_trivially_copyable_v<T>, "Data type must be trivially copyable."); + + if (!IsOpen()) { + return 0; + } + + return std::fwrite(data.data(), sizeof(T), data.size(), file); + } + + /** + * Reads a T object from a file sequentially. + * This function reads from the current position of the file pointer and + * advances it by the sizeof(T) bytes successfully read. + * + * Failures occur when: + * - The file is not open + * - The opened file lacks read permissions + * - Attempting to read beyond the end-of-file + * + * @tparam T Data type + * + * @param object Reference to object + * + * @returns True if the object is successfully read from the file, false otherwise. + */ + template <typename T> + [[nodiscard]] bool ReadObject(T& object) const { + static_assert(std::is_trivially_copyable_v<T>, "Data type must be trivially copyable."); + static_assert(!std::is_pointer_v<T>, "T must not be a pointer to an object."); + + if (!IsOpen()) { + return false; + } + + return std::fread(&object, sizeof(T), 1, file) == 1; + } + + /** + * Writes a T object to a file sequentially. + * This function writes from the current position of the file pointer and + * advances it by the sizeof(T) bytes successfully written. + * + * Failures occur when: + * - The file is not open + * - The opened file lacks write permissions + * + * @tparam T Data type + * + * @param object Const reference to object + * + * @returns True if the object is successfully written to the file, false otherwise. + */ + template <typename T> + [[nodiscard]] bool WriteObject(const T& object) const { + static_assert(std::is_trivially_copyable_v<T>, "Data type must be trivially copyable."); + static_assert(!std::is_pointer_v<T>, "T must not be a pointer to an object."); + + if (!IsOpen()) { + return false; + } + + return std::fwrite(&object, sizeof(T), 1, file) == 1; + } + + /** + * Specialized function to read a string of a given length from a file sequentially. + * This function writes from the current position of the file pointer and + * advances it by the number of characters successfully read. + * The size of the returned string may not match length if not all bytes are successfully read. + * + * @param length Length of the string + * + * @returns A string read from the file. + */ + [[nodiscard]] std::string ReadString(size_t length) const; + + /** + * Specialized function to write a string to a file sequentially. + * This function writes from the current position of the file pointer and + * advances it by the number of characters successfully written. + * + * @param string Span of const char backed std::string or std::string_view + * + * @returns Number of characters successfully written. + */ + [[nodiscard]] size_t WriteString(std::span<const char> string) const; + + /** + * Flushes any unwritten buffered data into the file. + * + * @returns True if the flush was successful, false otherwise. + */ + [[nodiscard]] bool Flush() const; + + /** + * Resizes the file to a given size. + * If the file is resized to a smaller size, the remainder of the file is discarded. + * If the file is resized to a larger size, the new area appears as if zero-filled. + * + * Failures occur when: + * - The file is not open + * + * @param size File size in bytes + * + * @returns True if the file resize succeeded, false otherwise. + */ + [[nodiscard]] bool SetSize(u64 size) const; + + /** + * Gets the size of the file. + * + * Failures occur when: + * - The file is not open + * + * @returns The file size in bytes of the file. Returns 0 on failure. + */ + [[nodiscard]] u64 GetSize() const; + + /** + * Moves the current position of the file pointer with the specified offset and seek origin. + * + * @param offset Offset from seek origin + * @param origin Seek origin + * + * @returns True if the file pointer has moved to the specified offset, false otherwise. + */ + [[nodiscard]] bool Seek(s64 offset, SeekOrigin origin = SeekOrigin::SetOrigin) const; + + /** + * Gets the current position of the file pointer. + * + * @returns The current position of the file pointer. + */ + [[nodiscard]] s64 Tell() const; + +private: + std::filesystem::path file_path; + FileAccessMode file_access_mode; + FileType file_type; + + std::FILE* file = nullptr; +}; + +} // namespace Common::FS diff --git a/src/common/fs/fs.cpp b/src/common/fs/fs.cpp new file mode 100644 index 000000000..d492480d9 --- /dev/null +++ b/src/common/fs/fs.cpp @@ -0,0 +1,610 @@ +// Copyright 2021 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include "common/fs/file.h" +#include "common/fs/fs.h" +#include "common/fs/path_util.h" +#include "common/logging/log.h" + +namespace Common::FS { + +namespace fs = std::filesystem; + +// File Operations + +bool NewFile(const fs::path& path, u64 size) { + if (!ValidatePath(path)) { + LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path)); + return false; + } + + if (!Exists(path.parent_path())) { + LOG_ERROR(Common_Filesystem, "Parent directory of path={} does not exist", + PathToUTF8String(path)); + return false; + } + + if (Exists(path)) { + LOG_ERROR(Common_Filesystem, "Filesystem object at path={} exists", PathToUTF8String(path)); + return false; + } + + IOFile io_file{path, FileAccessMode::Write}; + + if (!io_file.IsOpen()) { + LOG_ERROR(Common_Filesystem, "Failed to create a file at path={}", PathToUTF8String(path)); + return false; + } + + if (!io_file.SetSize(size)) { + LOG_ERROR(Common_Filesystem, "Failed to resize the file at path={} to size={}", + PathToUTF8String(path), size); + return false; + } + + io_file.Close(); + + LOG_DEBUG(Common_Filesystem, "Successfully created a file at path={} with size={}", + PathToUTF8String(path), size); + + return true; +} + +bool RemoveFile(const fs::path& path) { + if (!ValidatePath(path)) { + LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path)); + return false; + } + + if (!Exists(path)) { + LOG_DEBUG(Common_Filesystem, "Filesystem object at path={} does not exist", + PathToUTF8String(path)); + return true; + } + + if (!IsFile(path)) { + LOG_ERROR(Common_Filesystem, "Filesystem object at path={} is not a file", + PathToUTF8String(path)); + return false; + } + + std::error_code ec; + + fs::remove(path, ec); + + if (ec) { + LOG_ERROR(Common_Filesystem, "Failed to remove the file at path={}, ec_message={}", + PathToUTF8String(path), ec.message()); + return false; + } + + LOG_DEBUG(Common_Filesystem, "Successfully removed the file at path={}", + PathToUTF8String(path)); + + return true; +} + +bool RenameFile(const fs::path& old_path, const fs::path& new_path) { + if (!ValidatePath(old_path) || !ValidatePath(new_path)) { + LOG_ERROR(Common_Filesystem, + "One or both input path(s) is not valid, old_path={}, new_path={}", + PathToUTF8String(old_path), PathToUTF8String(new_path)); + return false; + } + + if (!Exists(old_path)) { + LOG_ERROR(Common_Filesystem, "Filesystem object at old_path={} does not exist", + PathToUTF8String(old_path)); + return false; + } + + if (!IsFile(old_path)) { + LOG_ERROR(Common_Filesystem, "Filesystem object at old_path={} is not a file", + PathToUTF8String(old_path)); + return false; + } + + if (Exists(new_path)) { + LOG_ERROR(Common_Filesystem, "Filesystem object at new_path={} exists", + PathToUTF8String(new_path)); + return false; + } + + std::error_code ec; + + fs::rename(old_path, new_path, ec); + + if (ec) { + LOG_ERROR(Common_Filesystem, + "Failed to rename the file from old_path={} to new_path={}, ec_message={}", + PathToUTF8String(old_path), PathToUTF8String(new_path), ec.message()); + return false; + } + + LOG_DEBUG(Common_Filesystem, "Successfully renamed the file from old_path={} to new_path={}", + PathToUTF8String(old_path), PathToUTF8String(new_path)); + + return true; +} + +std::shared_ptr<IOFile> FileOpen(const fs::path& path, FileAccessMode mode, FileType type, + FileShareFlag flag) { + if (!ValidatePath(path)) { + LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path)); + return nullptr; + } + + if (!IsFile(path)) { + LOG_ERROR(Common_Filesystem, "Filesystem object at path={} is not a file", + PathToUTF8String(path)); + return nullptr; + } + + auto io_file = std::make_shared<IOFile>(path, mode, type, flag); + + if (!io_file->IsOpen()) { + io_file.reset(); + + LOG_ERROR(Common_Filesystem, + "Failed to open the file at path={} with mode={}, type={}, flag={}", + PathToUTF8String(path), mode, type, flag); + + return nullptr; + } + + LOG_DEBUG(Common_Filesystem, + "Successfully opened the file at path={} with mode={}, type={}, flag={}", + PathToUTF8String(path), mode, type, flag); + + return io_file; +} + +// Directory Operations + +bool CreateDir(const fs::path& path) { + if (!ValidatePath(path)) { + LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path)); + return false; + } + + if (!Exists(path.parent_path())) { + LOG_ERROR(Common_Filesystem, "Parent directory of path={} does not exist", + PathToUTF8String(path)); + return false; + } + + if (IsDir(path)) { + LOG_DEBUG(Common_Filesystem, "Filesystem object at path={} exists and is a directory", + PathToUTF8String(path)); + return true; + } + + std::error_code ec; + + fs::create_directory(path, ec); + + if (ec) { + LOG_ERROR(Common_Filesystem, "Failed to create the directory at path={}, ec_message={}", + PathToUTF8String(path), ec.message()); + return false; + } + + LOG_DEBUG(Common_Filesystem, "Successfully created the directory at path={}", + PathToUTF8String(path)); + + return true; +} + +bool CreateDirs(const fs::path& path) { + if (!ValidatePath(path)) { + LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path)); + return false; + } + + if (IsDir(path)) { + LOG_DEBUG(Common_Filesystem, "Filesystem object at path={} exists and is a directory", + PathToUTF8String(path)); + return true; + } + + std::error_code ec; + + fs::create_directories(path, ec); + + if (ec) { + LOG_ERROR(Common_Filesystem, "Failed to create the directories at path={}, ec_message={}", + PathToUTF8String(path), ec.message()); + return false; + } + + LOG_DEBUG(Common_Filesystem, "Successfully created the directories at path={}", + PathToUTF8String(path)); + + return true; +} + +bool CreateParentDir(const fs::path& path) { + return CreateDir(path.parent_path()); +} + +bool CreateParentDirs(const fs::path& path) { + return CreateDirs(path.parent_path()); +} + +bool RemoveDir(const fs::path& path) { + if (!ValidatePath(path)) { + LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path)); + return false; + } + + if (!Exists(path)) { + LOG_DEBUG(Common_Filesystem, "Filesystem object at path={} does not exist", + PathToUTF8String(path)); + return true; + } + + if (!IsDir(path)) { + LOG_ERROR(Common_Filesystem, "Filesystem object at path={} is not a directory", + PathToUTF8String(path)); + return false; + } + + std::error_code ec; + + fs::remove(path, ec); + + if (ec) { + LOG_ERROR(Common_Filesystem, "Failed to remove the directory at path={}, ec_message={}", + PathToUTF8String(path), ec.message()); + return false; + } + + LOG_DEBUG(Common_Filesystem, "Successfully removed the directory at path={}", + PathToUTF8String(path)); + + return true; +} + +bool RemoveDirRecursively(const fs::path& path) { + if (!ValidatePath(path)) { + LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path)); + return false; + } + + if (!Exists(path)) { + LOG_DEBUG(Common_Filesystem, "Filesystem object at path={} does not exist", + PathToUTF8String(path)); + return true; + } + + if (!IsDir(path)) { + LOG_ERROR(Common_Filesystem, "Filesystem object at path={} is not a directory", + PathToUTF8String(path)); + return false; + } + + std::error_code ec; + + fs::remove_all(path, ec); + + if (ec) { + LOG_ERROR(Common_Filesystem, + "Failed to remove the directory and its contents at path={}, ec_message={}", + PathToUTF8String(path), ec.message()); + return false; + } + + LOG_DEBUG(Common_Filesystem, "Successfully removed the directory and its contents at path={}", + PathToUTF8String(path)); + + return true; +} + +bool RemoveDirContentsRecursively(const fs::path& path) { + if (!ValidatePath(path)) { + LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path)); + return false; + } + + if (!Exists(path)) { + LOG_DEBUG(Common_Filesystem, "Filesystem object at path={} does not exist", + PathToUTF8String(path)); + return true; + } + + if (!IsDir(path)) { + LOG_ERROR(Common_Filesystem, "Filesystem object at path={} is not a directory", + PathToUTF8String(path)); + return false; + } + + std::error_code ec; + + for (const auto& entry : fs::recursive_directory_iterator(path, ec)) { + if (ec) { + LOG_ERROR(Common_Filesystem, + "Failed to completely enumerate the directory at path={}, ec_message={}", + PathToUTF8String(path), ec.message()); + break; + } + + fs::remove(entry.path(), ec); + + if (ec) { + LOG_ERROR(Common_Filesystem, + "Failed to remove the filesystem object at path={}, ec_message={}", + PathToUTF8String(entry.path()), ec.message()); + break; + } + } + + if (ec) { + LOG_ERROR(Common_Filesystem, + "Failed to remove all the contents of the directory at path={}, ec_message={}", + PathToUTF8String(path), ec.message()); + return false; + } + + LOG_DEBUG(Common_Filesystem, + "Successfully removed all the contents of the directory at path={}", + PathToUTF8String(path)); + + return true; +} + +bool RenameDir(const fs::path& old_path, const fs::path& new_path) { + if (!ValidatePath(old_path) || !ValidatePath(new_path)) { + LOG_ERROR(Common_Filesystem, + "One or both input path(s) is not valid, old_path={}, new_path={}", + PathToUTF8String(old_path), PathToUTF8String(new_path)); + return false; + } + + if (!Exists(old_path)) { + LOG_ERROR(Common_Filesystem, "Filesystem object at old_path={} does not exist", + PathToUTF8String(old_path)); + return false; + } + + if (!IsDir(old_path)) { + LOG_ERROR(Common_Filesystem, "Filesystem object at old_path={} is not a directory", + PathToUTF8String(old_path)); + return false; + } + + if (Exists(new_path)) { + LOG_ERROR(Common_Filesystem, "Filesystem object at new_path={} exists", + PathToUTF8String(new_path)); + return false; + } + + std::error_code ec; + + fs::rename(old_path, new_path, ec); + + if (ec) { + LOG_ERROR(Common_Filesystem, + "Failed to rename the file from old_path={} to new_path={}, ec_message={}", + PathToUTF8String(old_path), PathToUTF8String(new_path), ec.message()); + return false; + } + + LOG_DEBUG(Common_Filesystem, "Successfully renamed the file from old_path={} to new_path={}", + PathToUTF8String(old_path), PathToUTF8String(new_path)); + + return true; +} + +void IterateDirEntries(const std::filesystem::path& path, const DirEntryCallable& callback, + DirEntryFilter filter) { + if (!ValidatePath(path)) { + LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path)); + return; + } + + if (!Exists(path)) { + LOG_ERROR(Common_Filesystem, "Filesystem object at path={} does not exist", + PathToUTF8String(path)); + return; + } + + if (!IsDir(path)) { + LOG_ERROR(Common_Filesystem, "Filesystem object at path={} is not a directory", + PathToUTF8String(path)); + return; + } + + bool callback_error = false; + + std::error_code ec; + + for (const auto& entry : fs::directory_iterator(path, ec)) { + if (ec) { + break; + } + + if (True(filter & DirEntryFilter::File) && + entry.status().type() == fs::file_type::regular) { + if (!callback(entry.path())) { + callback_error = true; + break; + } + } + + if (True(filter & DirEntryFilter::Directory) && + entry.status().type() == fs::file_type::directory) { + if (!callback(entry.path())) { + callback_error = true; + break; + } + } + } + + if (callback_error || ec) { + LOG_ERROR(Common_Filesystem, + "Failed to visit all the directory entries of path={}, ec_message={}", + PathToUTF8String(path), ec.message()); + return; + } + + LOG_DEBUG(Common_Filesystem, "Successfully visited all the directory entries of path={}", + PathToUTF8String(path)); +} + +void IterateDirEntriesRecursively(const std::filesystem::path& path, + const DirEntryCallable& callback, DirEntryFilter filter) { + if (!ValidatePath(path)) { + LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path)); + return; + } + + if (!Exists(path)) { + LOG_ERROR(Common_Filesystem, "Filesystem object at path={} does not exist", + PathToUTF8String(path)); + return; + } + + if (!IsDir(path)) { + LOG_ERROR(Common_Filesystem, "Filesystem object at path={} is not a directory", + PathToUTF8String(path)); + return; + } + + bool callback_error = false; + + std::error_code ec; + + for (const auto& entry : fs::recursive_directory_iterator(path, ec)) { + if (ec) { + break; + } + + if (True(filter & DirEntryFilter::File) && + entry.status().type() == fs::file_type::regular) { + if (!callback(entry.path())) { + callback_error = true; + break; + } + } + + if (True(filter & DirEntryFilter::Directory) && + entry.status().type() == fs::file_type::directory) { + if (!callback(entry.path())) { + callback_error = true; + break; + } + } + } + + if (callback_error || ec) { + LOG_ERROR(Common_Filesystem, + "Failed to visit all the directory entries of path={}, ec_message={}", + PathToUTF8String(path), ec.message()); + return; + } + + LOG_DEBUG(Common_Filesystem, "Successfully visited all the directory entries of path={}", + PathToUTF8String(path)); +} + +// Generic Filesystem Operations + +bool Exists(const fs::path& path) { + return fs::exists(path); +} + +bool IsFile(const fs::path& path) { + return fs::is_regular_file(path); +} + +bool IsDir(const fs::path& path) { + return fs::is_directory(path); +} + +fs::path GetCurrentDir() { + std::error_code ec; + + const auto current_path = fs::current_path(ec); + + if (ec) { + LOG_ERROR(Common_Filesystem, "Failed to get the current path, ec_message={}", ec.message()); + return {}; + } + + return current_path; +} + +bool SetCurrentDir(const fs::path& path) { + std::error_code ec; + + fs::current_path(path, ec); + + if (ec) { + LOG_ERROR(Common_Filesystem, "Failed to set the current path to path={}, ec_message={}", + PathToUTF8String(path), ec.message()); + return false; + } + + return true; +} + +fs::file_type GetEntryType(const fs::path& path) { + std::error_code ec; + + const auto file_status = fs::status(path, ec); + + if (ec) { + LOG_ERROR(Common_Filesystem, "Failed to retrieve the entry type of path={}, ec_message={}", + PathToUTF8String(path), ec.message()); + return fs::file_type::not_found; + } + + return file_status.type(); +} + +u64 GetSize(const fs::path& path) { + std::error_code ec; + + const auto file_size = fs::file_size(path, ec); + + if (ec) { + LOG_ERROR(Common_Filesystem, "Failed to retrieve the file size of path={}, ec_message={}", + PathToUTF8String(path), ec.message()); + return 0; + } + + return file_size; +} + +u64 GetFreeSpaceSize(const fs::path& path) { + std::error_code ec; + + const auto space_info = fs::space(path, ec); + + if (ec) { + LOG_ERROR(Common_Filesystem, + "Failed to retrieve the available free space of path={}, ec_message={}", + PathToUTF8String(path), ec.message()); + return 0; + } + + return space_info.free; +} + +u64 GetTotalSpaceSize(const fs::path& path) { + std::error_code ec; + + const auto space_info = fs::space(path, ec); + + if (ec) { + LOG_ERROR(Common_Filesystem, + "Failed to retrieve the total capacity of path={}, ec_message={}", + PathToUTF8String(path), ec.message()); + return 0; + } + + return space_info.capacity; +} + +} // namespace Common::FS diff --git a/src/common/fs/fs.h b/src/common/fs/fs.h new file mode 100644 index 000000000..f6f256349 --- /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 diff --git a/src/common/fs/fs_paths.h b/src/common/fs/fs_paths.h new file mode 100644 index 000000000..b32614797 --- /dev/null +++ b/src/common/fs/fs_paths.h @@ -0,0 +1,27 @@ +// Copyright 2021 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +// yuzu data directories + +#define YUZU_DIR "yuzu" +#define PORTABLE_DIR "user" + +// Sub-directories contained within a yuzu data directory + +#define CACHE_DIR "cache" +#define CONFIG_DIR "config" +#define DUMP_DIR "dump" +#define KEYS_DIR "keys" +#define LOAD_DIR "load" +#define LOG_DIR "log" +#define NAND_DIR "nand" +#define SCREENSHOTS_DIR "screenshots" +#define SDMC_DIR "sdmc" +#define SHADER_DIR "shader" + +// yuzu-specific files + +#define LOG_FILE "yuzu_log.txt" diff --git a/src/common/fs/fs_types.h b/src/common/fs/fs_types.h new file mode 100644 index 000000000..089980aee --- /dev/null +++ b/src/common/fs/fs_types.h @@ -0,0 +1,73 @@ +// Copyright 2021 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include <functional> + +#include "common/common_funcs.h" +#include "common/common_types.h" + +namespace Common::FS { + +enum class FileAccessMode { + /** + * If the file at path exists, it opens the file for reading. + * If the file at path does not exist, it fails to open the file. + */ + Read = 1 << 0, + /** + * If the file at path exists, the existing contents of the file are erased. + * The empty file is then opened for writing. + * If the file at path does not exist, it creates and opens a new empty file for writing. + */ + Write = 1 << 1, + /** + * If the file at path exists, it opens the file for reading and writing. + * If the file at path does not exist, it fails to open the file. + */ + ReadWrite = Read | Write, + /** + * If the file at path exists, it opens the file for appending. + * If the file at path does not exist, it creates and opens a new empty file for appending. + */ + Append = 1 << 2, + /** + * If the file at path exists, it opens the file for both reading and appending. + * If the file at path does not exist, it creates and opens a new empty file for both + * reading and appending. + */ + ReadAppend = Read | Append, +}; + +enum class FileType { + BinaryFile, + TextFile, +}; + +enum class FileShareFlag { + ShareNone, // Provides exclusive access to the file. + ShareReadOnly, // Provides read only shared access to the file. + ShareWriteOnly, // Provides write only shared access to the file. + ShareReadWrite, // Provides read and write shared access to the file. +}; + +enum class DirEntryFilter { + File = 1 << 0, + Directory = 1 << 1, + All = File | Directory, +}; +DECLARE_ENUM_FLAG_OPERATORS(DirEntryFilter); + +/** + * A callback function which takes in the path of a directory entry. + * + * @param path The path of a directory entry + * + * @returns A boolean value. + * Return true to indicate whether the callback is successful, false otherwise. + */ +using DirEntryCallable = std::function<bool(const std::filesystem::path& path)>; + +} // namespace Common::FS diff --git a/src/common/fs/fs_util.cpp b/src/common/fs/fs_util.cpp new file mode 100644 index 000000000..0ddfc3131 --- /dev/null +++ b/src/common/fs/fs_util.cpp @@ -0,0 +1,13 @@ +// Copyright 2021 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include "common/fs/fs_util.h" + +namespace Common::FS { + +std::u8string ToU8String(std::string_view utf8_string) { + return std::u8string{utf8_string.begin(), utf8_string.end()}; +} + +} // namespace Common::FS diff --git a/src/common/fs/fs_util.h b/src/common/fs/fs_util.h new file mode 100644 index 000000000..951df53b6 --- /dev/null +++ b/src/common/fs/fs_util.h @@ -0,0 +1,25 @@ +// Copyright 2021 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include <concepts> +#include <string> +#include <string_view> + +namespace Common::FS { + +template <typename T> +concept IsChar = std::same_as<T, char>; + +/** + * Converts a UTF-8 encoded std::string or std::string_view to a std::u8string. + * + * @param utf8_string UTF-8 encoded string + * + * @returns UTF-8 encoded std::u8string. + */ +[[nodiscard]] std::u8string ToU8String(std::string_view utf8_string); + +} // namespace Common::FS diff --git a/src/common/fs/path_util.cpp b/src/common/fs/path_util.cpp new file mode 100644 index 000000000..8b732a21c --- /dev/null +++ b/src/common/fs/path_util.cpp @@ -0,0 +1,432 @@ +// Copyright 2021 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include <algorithm> +#include <unordered_map> + +#include "common/fs/fs.h" +#include "common/fs/fs_paths.h" +#include "common/fs/path_util.h" +#include "common/logging/log.h" + +#ifdef _WIN32 +#include <shlobj.h> // Used in GetExeDirectory() +#else +#include <cstdlib> // Used in Get(Home/Data)Directory() +#include <pwd.h> // Used in GetHomeDirectory() +#include <sys/types.h> // Used in GetHomeDirectory() +#include <unistd.h> // Used in GetDataDirectory() +#endif + +#ifdef __APPLE__ +#include <sys/param.h> // Used in GetBundleDirectory() + +// CFURL contains __attribute__ directives that gcc does not know how to parse, so we need to just +// ignore them if we're not using clang. The macro is only used to prevent linking against +// functions that don't exist on older versions of macOS, and the worst case scenario is a linker +// error, so this is perfectly safe, just inconvenient. +#ifndef __clang__ +#define availability(...) +#endif +#include <CoreFoundation/CFBundle.h> // Used in GetBundleDirectory() +#include <CoreFoundation/CFString.h> // Used in GetBundleDirectory() +#include <CoreFoundation/CFURL.h> // Used in GetBundleDirectory() +#ifdef availability +#undef availability +#endif +#endif + +#ifndef MAX_PATH +#ifdef _WIN32 +// This is the maximum number of UTF-16 code units permissible in Windows file paths +#define MAX_PATH 260 +#else +// This is the maximum number of UTF-8 code units permissible in all other OSes' file paths +#define MAX_PATH 1024 +#endif +#endif + +namespace Common::FS { + +namespace fs = std::filesystem; + +/** + * The PathManagerImpl is a singleton allowing to manage the mapping of + * YuzuPath enums to real filesystem paths. + * This class provides 2 functions: GetYuzuPathImpl and SetYuzuPathImpl. + * These are used by GetYuzuPath and SetYuzuPath respectively to get or modify + * the path mapped by the YuzuPath enum. + */ +class PathManagerImpl { +public: + static PathManagerImpl& GetInstance() { + static PathManagerImpl path_manager_impl; + + return path_manager_impl; + } + + PathManagerImpl(const PathManagerImpl&) = delete; + PathManagerImpl& operator=(const PathManagerImpl&) = delete; + + PathManagerImpl(PathManagerImpl&&) = delete; + PathManagerImpl& operator=(PathManagerImpl&&) = delete; + + [[nodiscard]] const fs::path& GetYuzuPathImpl(YuzuPath yuzu_path) { + return yuzu_paths.at(yuzu_path); + } + + void SetYuzuPathImpl(YuzuPath yuzu_path, const fs::path& new_path) { + yuzu_paths.insert_or_assign(yuzu_path, new_path); + } + +private: + PathManagerImpl() { +#ifdef _WIN32 + auto yuzu_path = GetExeDirectory() / PORTABLE_DIR; + + if (!IsDir(yuzu_path)) { + yuzu_path = GetAppDataRoamingDirectory() / YUZU_DIR; + } + + GenerateYuzuPath(YuzuPath::YuzuDir, yuzu_path); + GenerateYuzuPath(YuzuPath::CacheDir, yuzu_path / CACHE_DIR); + GenerateYuzuPath(YuzuPath::ConfigDir, yuzu_path / CONFIG_DIR); +#else + auto yuzu_path = GetCurrentDir() / PORTABLE_DIR; + + if (Exists(yuzu_path) && IsDir(yuzu_path)) { + GenerateYuzuPath(YuzuPath::YuzuDir, yuzu_path); + GenerateYuzuPath(YuzuPath::CacheDir, yuzu_path / CACHE_DIR); + GenerateYuzuPath(YuzuPath::ConfigDir, yuzu_path / CONFIG_DIR); + } else { + yuzu_path = GetDataDirectory("XDG_DATA_HOME") / YUZU_DIR; + + GenerateYuzuPath(YuzuPath::YuzuDir, yuzu_path); + GenerateYuzuPath(YuzuPath::CacheDir, GetDataDirectory("XDG_CACHE_HOME") / YUZU_DIR); + GenerateYuzuPath(YuzuPath::ConfigDir, GetDataDirectory("XDG_CONFIG_HOME") / YUZU_DIR); + } +#endif + + GenerateYuzuPath(YuzuPath::DumpDir, yuzu_path / DUMP_DIR); + GenerateYuzuPath(YuzuPath::KeysDir, yuzu_path / KEYS_DIR); + GenerateYuzuPath(YuzuPath::LoadDir, yuzu_path / LOAD_DIR); + GenerateYuzuPath(YuzuPath::LogDir, yuzu_path / LOG_DIR); + GenerateYuzuPath(YuzuPath::NANDDir, yuzu_path / NAND_DIR); + GenerateYuzuPath(YuzuPath::ScreenshotsDir, yuzu_path / SCREENSHOTS_DIR); + GenerateYuzuPath(YuzuPath::SDMCDir, yuzu_path / SDMC_DIR); + GenerateYuzuPath(YuzuPath::ShaderDir, yuzu_path / SHADER_DIR); + } + + ~PathManagerImpl() = default; + + void GenerateYuzuPath(YuzuPath yuzu_path, const fs::path& new_path) { + void(FS::CreateDir(new_path)); + + SetYuzuPathImpl(yuzu_path, new_path); + } + + std::unordered_map<YuzuPath, fs::path> yuzu_paths; +}; + +std::string PathToUTF8String(const fs::path& path) { + const auto utf8_string = path.u8string(); + + return std::string{utf8_string.begin(), utf8_string.end()}; +} + +bool ValidatePath(const fs::path& path) { + if (path.empty()) { + LOG_ERROR(Common_Filesystem, "Input path is empty, path={}", PathToUTF8String(path)); + return false; + } + +#ifdef _WIN32 + if (path.u16string().size() >= MAX_PATH) { + LOG_ERROR(Common_Filesystem, "Input path is too long, path={}", PathToUTF8String(path)); + return false; + } +#else + if (path.u8string().size() >= MAX_PATH) { + LOG_ERROR(Common_Filesystem, "Input path is too long, path={}", PathToUTF8String(path)); + return false; + } +#endif + + return true; +} + +fs::path ConcatPath(const fs::path& first, const fs::path& second) { + const bool second_has_dir_sep = IsDirSeparator(second.u8string().front()); + + if (!second_has_dir_sep) { + return (first / second).lexically_normal(); + } + + fs::path concat_path = first; + concat_path += second; + + return concat_path.lexically_normal(); +} + +fs::path ConcatPathSafe(const fs::path& base, const fs::path& offset) { + const auto concatenated_path = ConcatPath(base, offset); + + if (!IsPathSandboxed(base, concatenated_path)) { + return base; + } + + return concatenated_path; +} + +bool IsPathSandboxed(const fs::path& base, const fs::path& path) { + const auto base_string = RemoveTrailingSeparators(base.lexically_normal()).u8string(); + const auto path_string = RemoveTrailingSeparators(path.lexically_normal()).u8string(); + + if (path_string.size() < base_string.size()) { + return false; + } + + return base_string.compare(0, base_string.size(), path_string, 0, base_string.size()) == 0; +} + +bool IsDirSeparator(char character) { + return character == '/' || character == '\\'; +} + +bool IsDirSeparator(char8_t character) { + return character == u8'/' || character == u8'\\'; +} + +fs::path RemoveTrailingSeparators(const fs::path& path) { + if (path.empty()) { + return path; + } + + auto string_path = path.u8string(); + + while (IsDirSeparator(string_path.back())) { + string_path.pop_back(); + } + + return fs::path{string_path}; +} + +const fs::path& GetYuzuPath(YuzuPath yuzu_path) { + return PathManagerImpl::GetInstance().GetYuzuPathImpl(yuzu_path); +} + +std::string GetYuzuPathString(YuzuPath yuzu_path) { + return PathToUTF8String(GetYuzuPath(yuzu_path)); +} + +void SetYuzuPath(YuzuPath yuzu_path, const fs::path& new_path) { + if (!FS::IsDir(new_path)) { + LOG_ERROR(Common_Filesystem, "Filesystem object at new_path={} is not a directory", + PathToUTF8String(new_path)); + return; + } + + PathManagerImpl::GetInstance().SetYuzuPathImpl(yuzu_path, new_path); +} + +#ifdef _WIN32 + +fs::path GetExeDirectory() { + wchar_t exe_path[MAX_PATH]; + + GetModuleFileNameW(nullptr, exe_path, MAX_PATH); + + if (!exe_path) { + LOG_ERROR(Common_Filesystem, + "Failed to get the path to the executable of the current process"); + } + + return fs::path{exe_path}.parent_path(); +} + +fs::path GetAppDataRoamingDirectory() { + PWSTR appdata_roaming_path = nullptr; + + SHGetKnownFolderPath(FOLDERID_RoamingAppData, 0, nullptr, &appdata_roaming_path); + + auto fs_appdata_roaming_path = fs::path{appdata_roaming_path}; + + CoTaskMemFree(appdata_roaming_path); + + if (fs_appdata_roaming_path.empty()) { + LOG_ERROR(Common_Filesystem, "Failed to get the path to the %APPDATA% directory"); + } + + return fs_appdata_roaming_path; +} + +#else + +fs::path GetHomeDirectory() { + const char* home_env_var = getenv("HOME"); + + if (home_env_var) { + return fs::path{home_env_var}; + } + + LOG_INFO(Common_Filesystem, + "$HOME is not defined in the environment variables, " + "attempting to query passwd to get the home path of the current user"); + + const auto* pw = getpwuid(getuid()); + + if (!pw) { + LOG_ERROR(Common_Filesystem, "Failed to get the home path of the current user"); + return {}; + } + + return fs::path{pw->pw_dir}; +} + +fs::path GetDataDirectory(const std::string& env_name) { + const char* data_env_var = getenv(env_name.c_str()); + + if (data_env_var) { + return fs::path{data_env_var}; + } + + if (env_name == "XDG_DATA_HOME") { + return GetHomeDirectory() / ".local/share"; + } else if (env_name == "XDG_CACHE_HOME") { + return GetHomeDirectory() / ".cache"; + } else if (env_name == "XDG_CONFIG_HOME") { + return GetHomeDirectory() / ".config"; + } + + return {}; +} + +#endif + +#ifdef __APPLE__ + +fs::path GetBundleDirectory() { + char app_bundle_path[MAXPATHLEN]; + + // Get the main bundle for the app + CFURLRef bundle_ref = CFBundleCopyBundleURL(CFBundleGetMainBundle()); + CFStringRef bundle_path = CFURLCopyFileSystemPath(bundle_ref, kCFURLPOSIXPathStyle); + + CFStringGetFileSystemRepresentation(bundle_path, app_bundle_path, sizeof(app_bundle_path)); + + CFRelease(bundle_ref); + CFRelease(bundle_path); + + return fs::path{app_bundle_path}; +} + +#endif + +// vvvvvvvvvv Deprecated vvvvvvvvvv // + +std::string_view RemoveTrailingSlash(std::string_view path) { + if (path.empty()) { + return path; + } + + if (path.back() == '\\' || path.back() == '/') { + path.remove_suffix(1); + return path; + } + + return path; +} + +std::vector<std::string> SplitPathComponents(std::string_view filename) { + std::string copy(filename); + std::replace(copy.begin(), copy.end(), '\\', '/'); + std::vector<std::string> out; + + std::stringstream stream(copy); + std::string item; + while (std::getline(stream, item, '/')) { + out.push_back(std::move(item)); + } + + return out; +} + +std::string SanitizePath(std::string_view path_, DirectorySeparator directory_separator) { + std::string path(path_); + char type1 = directory_separator == DirectorySeparator::BackwardSlash ? '/' : '\\'; + char type2 = directory_separator == DirectorySeparator::BackwardSlash ? '\\' : '/'; + + if (directory_separator == DirectorySeparator::PlatformDefault) { +#ifdef _WIN32 + type1 = '/'; + type2 = '\\'; +#endif + } + + std::replace(path.begin(), path.end(), type1, type2); + + auto start = path.begin(); +#ifdef _WIN32 + // allow network paths which start with a double backslash (e.g. \\server\share) + if (start != path.end()) + ++start; +#endif + path.erase(std::unique(start, path.end(), + [type2](char c1, char c2) { return c1 == type2 && c2 == type2; }), + path.end()); + return std::string(RemoveTrailingSlash(path)); +} + +std::string_view GetParentPath(std::string_view path) { + const auto name_bck_index = path.rfind('\\'); + const auto name_fwd_index = path.rfind('/'); + std::size_t name_index; + + if (name_bck_index == std::string_view::npos || name_fwd_index == std::string_view::npos) { + name_index = std::min(name_bck_index, name_fwd_index); + } else { + name_index = std::max(name_bck_index, name_fwd_index); + } + + return path.substr(0, name_index); +} + +std::string_view GetPathWithoutTop(std::string_view path) { + if (path.empty()) { + return path; + } + + while (path[0] == '\\' || path[0] == '/') { + path.remove_prefix(1); + if (path.empty()) { + return path; + } + } + + const auto name_bck_index = path.find('\\'); + const auto name_fwd_index = path.find('/'); + return path.substr(std::min(name_bck_index, name_fwd_index) + 1); +} + +std::string_view GetFilename(std::string_view path) { + const auto name_index = path.find_last_of("\\/"); + + if (name_index == std::string_view::npos) { + return {}; + } + + return path.substr(name_index + 1); +} + +std::string_view GetExtensionFromFilename(std::string_view name) { + const std::size_t index = name.rfind('.'); + + if (index == std::string_view::npos) { + return {}; + } + + return name.substr(index + 1); +} + +} // namespace Common::FS diff --git a/src/common/fs/path_util.h b/src/common/fs/path_util.h new file mode 100644 index 000000000..a9fadbceb --- /dev/null +++ b/src/common/fs/path_util.h @@ -0,0 +1,309 @@ +// Copyright 2021 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include <filesystem> +#include <vector> + +#include "common/fs/fs_util.h" + +namespace Common::FS { + +enum class YuzuPath { + YuzuDir, // Where yuzu stores its data. + CacheDir, // Where cached filesystem data is stored. + ConfigDir, // Where config files are stored. + DumpDir, // Where dumped data is stored. + KeysDir, // Where key files are stored. + LoadDir, // Where cheat/mod files are stored. + LogDir, // Where log files are stored. + NANDDir, // Where the emulated NAND is stored. + ScreenshotsDir, // Where yuzu screenshots are stored. + SDMCDir, // Where the emulated SDMC is stored. + ShaderDir, // Where shaders are stored. +}; + +/** + * Converts a filesystem path to a UTF-8 encoded std::string. + * + * @param path Filesystem path + * + * @returns UTF-8 encoded std::string. + */ +[[nodiscard]] std::string PathToUTF8String(const std::filesystem::path& path); + +/** + * Validates a given path. + * + * A given path is valid if it meets these conditions: + * - The path is not empty + * - The path is not too long + * + * @param path Filesystem path + * + * @returns True if the path is valid, false otherwise. + */ +[[nodiscard]] bool ValidatePath(const std::filesystem::path& path); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] bool ValidatePath(const Path& path) { + if constexpr (IsChar<typename Path::value_type>) { + return ValidatePath(ToU8String(path)); + } else { + return ValidatePath(std::filesystem::path{path}); + } +} +#endif + +/** + * Concatenates two filesystem paths together. + * + * This is needed since the following occurs when using std::filesystem::path's operator/: + * first: "/first/path" + * second: "/second/path" (Note that the second path has a directory separator in the front) + * first / second yields "/second/path" when the desired result is first/path/second/path + * + * @param first First filesystem path + * @param second Second filesystem path + * + * @returns A concatenated filesystem path. + */ +[[nodiscard]] std::filesystem::path ConcatPath(const std::filesystem::path& first, + const std::filesystem::path& second); + +#ifdef _WIN32 +template <typename Path1, typename Path2> +[[nodiscard]] std::filesystem::path ConcatPath(const Path1& first, const Path2& second) { + using ValueType1 = typename Path1::value_type; + using ValueType2 = typename Path2::value_type; + if constexpr (IsChar<ValueType1> && IsChar<ValueType2>) { + return ConcatPath(ToU8String(first), ToU8String(second)); + } else if constexpr (IsChar<ValueType1> && !IsChar<ValueType2>) { + return ConcatPath(ToU8String(first), second); + } else if constexpr (!IsChar<ValueType1> && IsChar<ValueType2>) { + return ConcatPath(first, ToU8String(second)); + } else { + return ConcatPath(std::filesystem::path{first}, std::filesystem::path{second}); + } +} +#endif + +/** + * Safe variant of ConcatPath that takes in a base path and an offset path from the given base path. + * + * If ConcatPath(base, offset) resolves to a path that is sandboxed within the base path, + * this will return the concatenated path. Otherwise this will return the base path. + * + * @param base Base filesystem path + * @param offset Offset filesystem path + * + * @returns A concatenated filesystem path if it is within the base path, + * returns the base path otherwise. + */ +[[nodiscard]] std::filesystem::path ConcatPathSafe(const std::filesystem::path& base, + const std::filesystem::path& offset); + +#ifdef _WIN32 +template <typename Path1, typename Path2> +[[nodiscard]] std::filesystem::path ConcatPathSafe(const Path1& base, const Path2& offset) { + using ValueType1 = typename Path1::value_type; + using ValueType2 = typename Path2::value_type; + if constexpr (IsChar<ValueType1> && IsChar<ValueType2>) { + return ConcatPathSafe(ToU8String(base), ToU8String(offset)); + } else if constexpr (IsChar<ValueType1> && !IsChar<ValueType2>) { + return ConcatPathSafe(ToU8String(base), offset); + } else if constexpr (!IsChar<ValueType1> && IsChar<ValueType2>) { + return ConcatPathSafe(base, ToU8String(offset)); + } else { + return ConcatPathSafe(std::filesystem::path{base}, std::filesystem::path{offset}); + } +} +#endif + +/** + * Checks whether a given path is sandboxed within a given base path. + * + * @param base Base filesystem path + * @param path Filesystem path + * + * @returns True if the given path is sandboxed within the given base path, false otherwise. + */ +[[nodiscard]] bool IsPathSandboxed(const std::filesystem::path& base, + const std::filesystem::path& path); + +#ifdef _WIN32 +template <typename Path1, typename Path2> +[[nodiscard]] bool IsPathSandboxed(const Path1& base, const Path2& path) { + using ValueType1 = typename Path1::value_type; + using ValueType2 = typename Path2::value_type; + if constexpr (IsChar<ValueType1> && IsChar<ValueType2>) { + return IsPathSandboxed(ToU8String(base), ToU8String(path)); + } else if constexpr (IsChar<ValueType1> && !IsChar<ValueType2>) { + return IsPathSandboxed(ToU8String(base), path); + } else if constexpr (!IsChar<ValueType1> && IsChar<ValueType2>) { + return IsPathSandboxed(base, ToU8String(path)); + } else { + return IsPathSandboxed(std::filesystem::path{base}, std::filesystem::path{path}); + } +} +#endif + +/** + * Checks if a character is a directory separator (either a forward slash or backslash). + * + * @param character Character + * + * @returns True if the character is a directory separator, false otherwise. + */ +[[nodiscard]] bool IsDirSeparator(char character); + +/** + * Checks if a character is a directory separator (either a forward slash or backslash). + * + * @param character Character + * + * @returns True if the character is a directory separator, false otherwise. + */ +[[nodiscard]] bool IsDirSeparator(char8_t character); + +/** + * Removes any trailing directory separators if they exist in the given path. + * + * @param path Filesystem path + * + * @returns The filesystem path without any trailing directory separators. + */ +[[nodiscard]] std::filesystem::path RemoveTrailingSeparators(const std::filesystem::path& path); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] std::filesystem::path RemoveTrailingSeparators(const Path& path) { + if constexpr (IsChar<typename Path::value_type>) { + return RemoveTrailingSeparators(ToU8String(path)); + } else { + return RemoveTrailingSeparators(std::filesystem::path{path}); + } +} +#endif + +/** + * Gets the filesystem path associated with the YuzuPath enum. + * + * @param yuzu_path YuzuPath enum + * + * @returns The filesystem path associated with the YuzuPath enum. + */ +[[nodiscard]] const std::filesystem::path& GetYuzuPath(YuzuPath yuzu_path); + +/** + * Gets the filesystem path associated with the YuzuPath enum as a UTF-8 encoded std::string. + * + * @param yuzu_path YuzuPath enum + * + * @returns The filesystem path associated with the YuzuPath enum as a UTF-8 encoded std::string. + */ +[[nodiscard]] std::string GetYuzuPathString(YuzuPath yuzu_path); + +/** + * Sets a new filesystem path associated with the YuzuPath enum. + * If the filesystem object at new_path is not a directory, this function will not do anything. + * + * @param yuzu_path YuzuPath enum + * @param new_path New filesystem path + */ +void SetYuzuPath(YuzuPath yuzu_path, const std::filesystem::path& new_path); + +#ifdef _WIN32 +template <typename Path> +[[nodiscard]] void SetYuzuPath(YuzuPath yuzu_path, const Path& new_path) { + if constexpr (IsChar<typename Path::value_type>) { + SetYuzuPath(yuzu_path, ToU8String(new_path)); + } else { + SetYuzuPath(yuzu_path, std::filesystem::path{new_path}); + } +} +#endif + +#ifdef _WIN32 + +/** + * Gets the path of the directory containing the executable of the current process. + * + * @returns The path of the directory containing the executable of the current process. + */ +[[nodiscard]] std::filesystem::path GetExeDirectory(); + +/** + * Gets the path of the current user's %APPDATA% directory (%USERPROFILE%/AppData/Roaming). + * + * @returns The path of the current user's %APPDATA% directory. + */ +[[nodiscard]] std::filesystem::path GetAppDataRoamingDirectory(); + +#else + +/** + * Gets the path of the directory specified by the #HOME environment variable. + * If $HOME is not defined, it will attempt to query the user database in passwd instead. + * + * @returns The path of the current user's home directory. + */ +[[nodiscard]] std::filesystem::path GetHomeDirectory(); + +/** + * Gets the relevant paths for yuzu to store its data based on the given XDG environment variable. + * See https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html + * Defaults to $HOME/.local/share for main application data, + * $HOME/.cache for cached data, and $HOME/.config for configuration files. + * + * @param env_name XDG environment variable name + * + * @returns The path where yuzu should store its data. + */ +[[nodiscard]] std::filesystem::path GetDataDirectory(const std::string& env_name); + +#endif + +#ifdef __APPLE__ + +[[nodiscard]] std::filesystem::path GetBundleDirectory(); + +#endif + +// vvvvvvvvvv Deprecated vvvvvvvvvv // + +// Removes the final '/' or '\' if one exists +[[nodiscard]] std::string_view RemoveTrailingSlash(std::string_view path); + +enum class DirectorySeparator { + ForwardSlash, + BackwardSlash, + PlatformDefault, +}; + +// Splits the path on '/' or '\' and put the components into a vector +// i.e. "C:\Users\Yuzu\Documents\save.bin" becomes {"C:", "Users", "Yuzu", "Documents", "save.bin" } +[[nodiscard]] std::vector<std::string> SplitPathComponents(std::string_view filename); + +// Removes trailing slash, makes all '\\' into '/', and removes duplicate '/'. Makes '/' into '\\' +// depending if directory_separator is BackwardSlash or PlatformDefault and running on windows +[[nodiscard]] std::string SanitizePath( + std::string_view path, + DirectorySeparator directory_separator = DirectorySeparator::ForwardSlash); + +// Gets all of the text up to the last '/' or '\' in the path. +[[nodiscard]] std::string_view GetParentPath(std::string_view path); + +// Gets all of the text after the first '/' or '\' in the path. +[[nodiscard]] std::string_view GetPathWithoutTop(std::string_view path); + +// Gets the filename of the path +[[nodiscard]] std::string_view GetFilename(std::string_view path); + +// Gets the extension of the filename +[[nodiscard]] std::string_view GetExtensionFromFilename(std::string_view name); + +} // namespace Common::FS |