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https://github.com/yuzu-mirror/yuzu.git
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294 lines
9.8 KiB
C++
294 lines
9.8 KiB
C++
// Copyright 2013 Dolphin Emulator Project / 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <array>
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#include <cstdio>
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#include <fstream>
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#include <functional>
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#include <limits>
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#include <string>
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#include <string_view>
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#include <type_traits>
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#include <vector>
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#include "common/common_types.h"
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#ifdef _MSC_VER
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#include "common/string_util.h"
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#endif
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namespace FileUtil {
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// User paths for GetUserPath
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enum class UserPath {
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CacheDir,
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ConfigDir,
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KeysDir,
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LogDir,
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NANDDir,
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RootDir,
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SDMCDir,
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LoadDir,
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DumpDir,
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ShaderDir,
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SysDataDir,
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UserDir,
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};
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// FileSystem tree node/
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struct FSTEntry {
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bool isDirectory;
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u64 size; // file length or number of entries from children
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std::string physicalName; // name on disk
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std::string virtualName; // name in FST names table
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std::vector<FSTEntry> children;
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};
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// Returns true if file filename exists
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bool Exists(const std::string& filename);
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// Returns true if filename is a directory
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bool IsDirectory(const std::string& filename);
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// Returns the size of filename (64bit)
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u64 GetSize(const std::string& filename);
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// Overloaded GetSize, accepts file descriptor
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u64 GetSize(const int fd);
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// Overloaded GetSize, accepts FILE*
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u64 GetSize(FILE* f);
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// Returns true if successful, or path already exists.
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bool CreateDir(const std::string& filename);
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// Creates the full path of fullPath returns true on success
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bool CreateFullPath(const std::string& fullPath);
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// Deletes a given filename, return true on success
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// Doesn't supports deleting a directory
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bool Delete(const std::string& filename);
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// Deletes a directory filename, returns true on success
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bool DeleteDir(const std::string& filename);
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// renames file srcFilename to destFilename, returns true on success
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bool Rename(const std::string& srcFilename, const std::string& destFilename);
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// copies file srcFilename to destFilename, returns true on success
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bool Copy(const std::string& srcFilename, const std::string& destFilename);
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// creates an empty file filename, returns true on success
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bool CreateEmptyFile(const std::string& filename);
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/**
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* @param num_entries_out to be assigned by the callable with the number of iterated directory
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* entries, never null
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* @param directory the path to the enclosing directory
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* @param virtual_name the entry name, without any preceding directory info
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* @return whether handling the entry succeeded
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*/
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using DirectoryEntryCallable = std::function<bool(
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u64* num_entries_out, const std::string& directory, const std::string& virtual_name)>;
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/**
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* Scans a directory, calling the callback for each file/directory contained within.
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* If the callback returns failure, scanning halts and this function returns failure as well
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* @param num_entries_out assigned by the function with the number of iterated directory entries,
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* can be null
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* @param directory the directory to scan
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* @param callback The callback which will be called for each entry
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* @return whether scanning the directory succeeded
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*/
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bool ForeachDirectoryEntry(u64* num_entries_out, const std::string& directory,
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DirectoryEntryCallable callback);
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/**
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* Scans the directory tree, storing the results.
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* @param directory the parent directory to start scanning from
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* @param parent_entry FSTEntry where the filesystem tree results will be stored.
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* @param recursion Number of children directories to read before giving up.
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* @return the total number of files/directories found
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*/
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u64 ScanDirectoryTree(const std::string& directory, FSTEntry& parent_entry,
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unsigned int recursion = 0);
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// deletes the given directory and anything under it. Returns true on success.
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bool DeleteDirRecursively(const std::string& directory, unsigned int recursion = 256);
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// Returns the current directory
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std::string GetCurrentDir();
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// Create directory and copy contents (does not overwrite existing files)
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void CopyDir(const std::string& source_path, const std::string& dest_path);
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// Set the current directory to given directory
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bool SetCurrentDir(const std::string& directory);
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// Returns a pointer to a string with a yuzu data dir in the user's home
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// directory. To be used in "multi-user" mode (that is, installed).
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const std::string& GetUserPath(UserPath path, const std::string& new_path = "");
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std::string GetHactoolConfigurationPath();
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std::string GetNANDRegistrationDir(bool system = false);
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// Returns the path to where the sys file are
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std::string GetSysDirectory();
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#ifdef __APPLE__
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std::string GetBundleDirectory();
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#endif
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#ifdef _WIN32
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const std::string& GetExeDirectory();
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std::string AppDataRoamingDirectory();
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#endif
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std::size_t WriteStringToFile(bool text_file, const std::string& str, const char* filename);
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std::size_t ReadFileToString(bool text_file, const char* filename, std::string& str);
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/**
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* Splits the filename into 8.3 format
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* Loosely implemented following https://en.wikipedia.org/wiki/8.3_filename
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* @param filename The normal filename to use
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* @param short_name A 9-char array in which the short name will be written
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* @param extension A 4-char array in which the extension will be written
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*/
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void SplitFilename83(const std::string& filename, std::array<char, 9>& short_name,
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std::array<char, 4>& extension);
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// Splits the path on '/' or '\' and put the components into a vector
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// i.e. "C:\Users\Yuzu\Documents\save.bin" becomes {"C:", "Users", "Yuzu", "Documents", "save.bin" }
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std::vector<std::string> SplitPathComponents(std::string_view filename);
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// Gets all of the text up to the last '/' or '\' in the path.
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std::string_view GetParentPath(std::string_view path);
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// Gets all of the text after the first '/' or '\' in the path.
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std::string_view GetPathWithoutTop(std::string_view path);
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// Gets the filename of the path
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std::string_view GetFilename(std::string_view path);
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// Gets the extension of the filename
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std::string_view GetExtensionFromFilename(std::string_view name);
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// Removes the final '/' or '\' if one exists
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std::string_view RemoveTrailingSlash(std::string_view path);
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// Creates a new vector containing indices [first, last) from the original.
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template <typename T>
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std::vector<T> SliceVector(const std::vector<T>& vector, std::size_t first, std::size_t last) {
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if (first >= last)
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return {};
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last = std::min<std::size_t>(last, vector.size());
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return std::vector<T>(vector.begin() + first, vector.begin() + first + last);
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}
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enum class DirectorySeparator { ForwardSlash, BackwardSlash, PlatformDefault };
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// Removes trailing slash, makes all '\\' into '/', and removes duplicate '/'. Makes '/' into '\\'
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// depending if directory_separator is BackwardSlash or PlatformDefault and running on windows
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std::string SanitizePath(std::string_view path,
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DirectorySeparator directory_separator = DirectorySeparator::ForwardSlash);
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// simple wrapper for cstdlib file functions to
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// hopefully will make error checking easier
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// and make forgetting an fclose() harder
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class IOFile : public NonCopyable {
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public:
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IOFile();
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// flags is used for windows specific file open mode flags, which
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// allows yuzu to open the logs in shared write mode, so that the file
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// isn't considered "locked" while yuzu is open and people can open the log file and view it
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IOFile(const std::string& filename, const char openmode[], int flags = 0);
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~IOFile();
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IOFile(IOFile&& other) noexcept;
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IOFile& operator=(IOFile&& other) noexcept;
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void Swap(IOFile& other) noexcept;
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bool Open(const std::string& filename, const char openmode[], int flags = 0);
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bool Close();
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template <typename T>
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std::size_t ReadArray(T* data, std::size_t length) const {
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static_assert(std::is_trivially_copyable_v<T>,
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"Given array does not consist of trivially copyable objects");
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if (!IsOpen()) {
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return std::numeric_limits<std::size_t>::max();
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}
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return std::fread(data, sizeof(T), length, m_file);
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}
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template <typename T>
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std::size_t WriteArray(const T* data, std::size_t length) {
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static_assert(std::is_trivially_copyable_v<T>,
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"Given array does not consist of trivially copyable objects");
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if (!IsOpen()) {
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return std::numeric_limits<std::size_t>::max();
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}
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return std::fwrite(data, sizeof(T), length, m_file);
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}
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template <typename T>
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std::size_t ReadBytes(T* data, std::size_t length) const {
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static_assert(std::is_trivially_copyable_v<T>, "T must be trivially copyable");
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return ReadArray(reinterpret_cast<char*>(data), length);
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}
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template <typename T>
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std::size_t WriteBytes(const T* data, std::size_t length) {
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static_assert(std::is_trivially_copyable_v<T>, "T must be trivially copyable");
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return WriteArray(reinterpret_cast<const char*>(data), length);
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}
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template <typename T>
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std::size_t WriteObject(const T& object) {
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static_assert(!std::is_pointer_v<T>, "WriteObject arguments must not be a pointer");
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return WriteArray(&object, 1);
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}
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std::size_t WriteString(const std::string& str) {
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return WriteArray(str.c_str(), str.length());
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}
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bool IsOpen() const {
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return nullptr != m_file;
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}
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bool Seek(s64 off, int origin) const;
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u64 Tell() const;
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u64 GetSize() const;
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bool Resize(u64 size);
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bool Flush();
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// clear error state
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void Clear() {
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std::clearerr(m_file);
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}
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private:
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std::FILE* m_file = nullptr;
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};
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} // namespace FileUtil
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// To deal with Windows being dumb at unicode:
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template <typename T>
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void OpenFStream(T& fstream, const std::string& filename, std::ios_base::openmode openmode) {
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#ifdef _MSC_VER
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fstream.open(Common::UTF8ToUTF16W(filename).c_str(), openmode);
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#else
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fstream.open(filename.c_str(), openmode);
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#endif
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}
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