mirror of
https://github.com/yuzu-mirror/yuzu
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392 lines
9.5 KiB
C++
392 lines
9.5 KiB
C++
// Copyright 2021 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include "common/fs/file.h"
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#include "common/fs/fs.h"
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#include "common/fs/path_util.h"
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#include "common/logging/log.h"
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#ifdef _WIN32
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#include <io.h>
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#include <share.h>
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#else
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#include <unistd.h>
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#endif
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#ifdef _MSC_VER
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#define fileno _fileno
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#define fseeko _fseeki64
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#define ftello _ftelli64
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#endif
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namespace Common::FS {
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namespace fs = std::filesystem;
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namespace {
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#ifdef _WIN32
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/**
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* Converts the file access mode and file type enums to a file access mode wide string.
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*
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* @param mode File access mode
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* @param type File type
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*
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* @returns A pointer to a wide string representing the file access mode.
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*/
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[[nodiscard]] constexpr const wchar_t* AccessModeToWStr(FileAccessMode mode, FileType type) {
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switch (type) {
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case FileType::BinaryFile:
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switch (mode) {
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case FileAccessMode::Read:
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return L"rb";
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case FileAccessMode::Write:
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return L"wb";
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case FileAccessMode::Append:
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return L"ab";
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case FileAccessMode::ReadWrite:
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return L"r+b";
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case FileAccessMode::ReadAppend:
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return L"a+b";
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}
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break;
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case FileType::TextFile:
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switch (mode) {
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case FileAccessMode::Read:
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return L"r";
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case FileAccessMode::Write:
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return L"w";
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case FileAccessMode::Append:
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return L"a";
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case FileAccessMode::ReadWrite:
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return L"r+";
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case FileAccessMode::ReadAppend:
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return L"a+";
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}
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break;
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}
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return L"";
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}
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/**
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* Converts the file-share access flag enum to a Windows defined file-share access flag.
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*
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* @param flag File-share access flag
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*
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* @returns Windows defined file-share access flag.
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*/
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[[nodiscard]] constexpr int ToWindowsFileShareFlag(FileShareFlag flag) {
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switch (flag) {
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case FileShareFlag::ShareNone:
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default:
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return _SH_DENYRW;
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case FileShareFlag::ShareReadOnly:
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return _SH_DENYWR;
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case FileShareFlag::ShareWriteOnly:
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return _SH_DENYRD;
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case FileShareFlag::ShareReadWrite:
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return _SH_DENYNO;
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}
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}
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#else
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/**
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* Converts the file access mode and file type enums to a file access mode string.
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*
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* @param mode File access mode
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* @param type File type
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*
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* @returns A pointer to a string representing the file access mode.
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*/
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[[nodiscard]] constexpr const char* AccessModeToStr(FileAccessMode mode, FileType type) {
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switch (type) {
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case FileType::BinaryFile:
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switch (mode) {
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case FileAccessMode::Read:
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return "rb";
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case FileAccessMode::Write:
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return "wb";
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case FileAccessMode::Append:
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return "ab";
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case FileAccessMode::ReadWrite:
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return "r+b";
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case FileAccessMode::ReadAppend:
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return "a+b";
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}
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break;
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case FileType::TextFile:
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switch (mode) {
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case FileAccessMode::Read:
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return "r";
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case FileAccessMode::Write:
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return "w";
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case FileAccessMode::Append:
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return "a";
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case FileAccessMode::ReadWrite:
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return "r+";
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case FileAccessMode::ReadAppend:
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return "a+";
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}
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break;
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}
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return "";
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}
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#endif
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/**
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* Converts the seek origin enum to a seek origin integer.
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*
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* @param origin Seek origin
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*
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* @returns Seek origin integer.
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*/
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[[nodiscard]] constexpr int ToSeekOrigin(SeekOrigin origin) {
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switch (origin) {
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case SeekOrigin::SetOrigin:
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default:
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return SEEK_SET;
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case SeekOrigin::CurrentPosition:
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return SEEK_CUR;
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case SeekOrigin::End:
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return SEEK_END;
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}
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}
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} // Anonymous namespace
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std::string ReadStringFromFile(const std::filesystem::path& path, FileType type) {
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if (!IsFile(path)) {
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return "";
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}
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IOFile io_file{path, FileAccessMode::Read, type};
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return io_file.ReadString(io_file.GetSize());
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}
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size_t WriteStringToFile(const std::filesystem::path& path, FileType type,
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std::string_view string) {
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if (!IsFile(path)) {
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return 0;
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}
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IOFile io_file{path, FileAccessMode::Write, type};
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return io_file.WriteString(string);
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}
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size_t AppendStringToFile(const std::filesystem::path& path, FileType type,
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std::string_view string) {
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if (!IsFile(path)) {
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return 0;
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}
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IOFile io_file{path, FileAccessMode::Append, type};
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return io_file.WriteString(string);
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}
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IOFile::IOFile() = default;
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IOFile::IOFile(const std::string& path, FileAccessMode mode, FileType type, FileShareFlag flag) {
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Open(path, mode, type, flag);
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}
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IOFile::IOFile(std::string_view path, FileAccessMode mode, FileType type, FileShareFlag flag) {
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Open(path, mode, type, flag);
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}
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IOFile::IOFile(const fs::path& path, FileAccessMode mode, FileType type, FileShareFlag flag) {
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Open(path, mode, type, flag);
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}
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IOFile::~IOFile() {
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Close();
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}
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IOFile::IOFile(IOFile&& other) noexcept {
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std::swap(file_path, other.file_path);
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std::swap(file_access_mode, other.file_access_mode);
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std::swap(file_type, other.file_type);
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std::swap(file, other.file);
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}
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IOFile& IOFile::operator=(IOFile&& other) noexcept {
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std::swap(file_path, other.file_path);
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std::swap(file_access_mode, other.file_access_mode);
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std::swap(file_type, other.file_type);
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std::swap(file, other.file);
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return *this;
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}
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fs::path IOFile::GetPath() const {
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return file_path;
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}
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FileAccessMode IOFile::GetAccessMode() const {
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return file_access_mode;
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}
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FileType IOFile::GetType() const {
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return file_type;
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}
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void IOFile::Open(const fs::path& path, FileAccessMode mode, FileType type, FileShareFlag flag) {
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Close();
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file_path = path;
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file_access_mode = mode;
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file_type = type;
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errno = 0;
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#ifdef _WIN32
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if (flag != FileShareFlag::ShareNone) {
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file = _wfsopen(path.c_str(), AccessModeToWStr(mode, type), ToWindowsFileShareFlag(flag));
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} else {
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_wfopen_s(&file, path.c_str(), AccessModeToWStr(mode, type));
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}
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#else
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file = std::fopen(path.c_str(), AccessModeToStr(mode, type));
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#endif
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if (!IsOpen()) {
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const auto ec = std::error_code{errno, std::generic_category()};
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LOG_ERROR(Common_Filesystem, "Failed to open the file at path={}, ec_message={}",
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PathToUTF8String(file_path), ec.message());
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}
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}
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void IOFile::Close() {
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if (!IsOpen()) {
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return;
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}
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errno = 0;
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const auto close_result = std::fclose(file) == 0;
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if (!close_result) {
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const auto ec = std::error_code{errno, std::generic_category()};
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LOG_ERROR(Common_Filesystem, "Failed to close the file at path={}, ec_message={}",
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PathToUTF8String(file_path), ec.message());
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}
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file = nullptr;
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}
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bool IOFile::IsOpen() const {
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return file != nullptr;
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}
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std::string IOFile::ReadString(size_t length) const {
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std::vector<char> string_buffer(length);
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const auto chars_read = ReadSpan<char>(string_buffer);
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const auto string_size = chars_read != length ? chars_read : length;
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return std::string{string_buffer.data(), string_size};
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}
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size_t IOFile::WriteString(std::span<const char> string) const {
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return WriteSpan(string);
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}
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bool IOFile::Flush() const {
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if (!IsOpen()) {
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return false;
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}
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errno = 0;
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#ifdef _WIN32
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const auto flush_result = std::fflush(file) == 0 && _commit(fileno(file)) == 0;
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#else
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const auto flush_result = std::fflush(file) == 0 && fsync(fileno(file)) == 0;
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#endif
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if (!flush_result) {
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const auto ec = std::error_code{errno, std::generic_category()};
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LOG_ERROR(Common_Filesystem, "Failed to flush the file at path={}, ec_message={}",
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PathToUTF8String(file_path), ec.message());
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}
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return flush_result;
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}
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bool IOFile::SetSize(u64 size) const {
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if (!IsOpen()) {
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return false;
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}
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errno = 0;
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#ifdef _WIN32
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const auto set_size_result = _chsize_s(fileno(file), static_cast<s64>(size)) == 0;
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#else
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const auto set_size_result = ftruncate(fileno(file), static_cast<s64>(size)) == 0;
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#endif
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if (!set_size_result) {
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const auto ec = std::error_code{errno, std::generic_category()};
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LOG_ERROR(Common_Filesystem, "Failed to resize the file at path={}, size={}, ec_message={}",
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PathToUTF8String(file_path), size, ec.message());
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}
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return set_size_result;
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}
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u64 IOFile::GetSize() const {
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if (!IsOpen()) {
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return 0;
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}
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std::error_code ec;
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const auto file_size = fs::file_size(file_path, ec);
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if (ec) {
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LOG_ERROR(Common_Filesystem, "Failed to retrieve the file size of path={}, ec_message={}",
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PathToUTF8String(file_path), ec.message());
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return 0;
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}
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return file_size;
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}
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bool IOFile::Seek(s64 offset, SeekOrigin origin) const {
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if (!IsOpen()) {
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return false;
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}
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errno = 0;
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const auto seek_result = fseeko(file, offset, ToSeekOrigin(origin)) == 0;
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if (!seek_result) {
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const auto ec = std::error_code{errno, std::generic_category()};
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LOG_ERROR(Common_Filesystem,
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"Failed to seek the file at path={}, offset={}, origin={}, ec_message={}",
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PathToUTF8String(file_path), offset, origin, ec.message());
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}
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return seek_result;
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}
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s64 IOFile::Tell() const {
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if (!IsOpen()) {
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return 0;
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}
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errno = 0;
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return ftello(file);
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}
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} // namespace Common::FS
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