yuzu/src/common/file_util.cpp

892 lines
26 KiB
C++
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

// Copyright 2013 Dolphin Emulator Project / 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_funcs.h"
#include "common/common_paths.h"
#include "common/file_util.h"
#include "common/logging/log.h"
#ifdef _WIN32
#include <windows.h>
// windows.h needs to be included before other windows headers
#include <commdlg.h> // for GetSaveFileName
#include <direct.h> // getcwd
#include <io.h>
#include <shellapi.h>
#include <shlobj.h> // for SHGetFolderPath
#include <tchar.h>
#include "common/string_util.h"
// 64 bit offsets for windows
#define fseeko _fseeki64
#define ftello _ftelli64
#define atoll _atoi64
#define stat _stat64
#define fstat _fstat64
#define fileno _fileno
#else
#ifdef __APPLE__
#include <sys/param.h>
#endif
#include <cctype>
#include <cerrno>
#include <cstdlib>
#include <cstring>
#include <dirent.h>
#include <pwd.h>
#include <unistd.h>
#endif
#if defined(__APPLE__)
// 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>
#include <CoreFoundation/CFString.h>
#include <CoreFoundation/CFURL.h>
#ifdef availability
#undef availability
#endif
#endif
#include <algorithm>
#include <sys/stat.h>
#ifndef S_ISDIR
#define S_ISDIR(m) (((m)&S_IFMT) == S_IFDIR)
#endif
// This namespace has various generic functions related to files and paths.
// The code still needs a ton of cleanup.
// REMEMBER: strdup considered harmful!
namespace FileUtil {
// Remove any ending forward slashes from directory paths
// Modifies argument.
static void StripTailDirSlashes(std::string& fname) {
if (fname.length() > 1) {
size_t i = fname.length();
while (i > 0 && fname[i - 1] == DIR_SEP_CHR)
--i;
fname.resize(i);
}
return;
}
// Returns true if file filename exists
bool Exists(const std::string& filename) {
struct stat file_info;
std::string copy(filename);
StripTailDirSlashes(copy);
#ifdef _WIN32
// Windows needs a slash to identify a driver root
if (copy.size() != 0 && copy.back() == ':')
copy += DIR_SEP_CHR;
int result = _wstat64(Common::UTF8ToUTF16W(copy).c_str(), &file_info);
#else
int result = stat(copy.c_str(), &file_info);
#endif
return (result == 0);
}
// Returns true if filename is a directory
bool IsDirectory(const std::string& filename) {
struct stat file_info;
std::string copy(filename);
StripTailDirSlashes(copy);
#ifdef _WIN32
// Windows needs a slash to identify a driver root
if (copy.size() != 0 && copy.back() == ':')
copy += DIR_SEP_CHR;
int result = _wstat64(Common::UTF8ToUTF16W(copy).c_str(), &file_info);
#else
int result = stat(copy.c_str(), &file_info);
#endif
if (result < 0) {
NGLOG_DEBUG(Common_Filesystem, "stat failed on {}: {}", filename, GetLastErrorMsg());
return false;
}
return S_ISDIR(file_info.st_mode);
}
// Deletes a given filename, return true on success
// Doesn't supports deleting a directory
bool Delete(const std::string& filename) {
NGLOG_TRACE(Common_Filesystem, "file {}", filename);
// Return true because we care about the file no
// being there, not the actual delete.
if (!Exists(filename)) {
NGLOG_DEBUG(Common_Filesystem, "{} does not exist", filename);
return true;
}
// We can't delete a directory
if (IsDirectory(filename)) {
NGLOG_ERROR(Common_Filesystem, "Failed: {} is a directory", filename);
return false;
}
#ifdef _WIN32
if (!DeleteFileW(Common::UTF8ToUTF16W(filename).c_str())) {
NGLOG_ERROR(Common_Filesystem, "DeleteFile failed on {}: {}", filename, GetLastErrorMsg());
return false;
}
#else
if (unlink(filename.c_str()) == -1) {
NGLOG_ERROR(Common_Filesystem, "unlink failed on {}: {}", filename, GetLastErrorMsg());
return false;
}
#endif
return true;
}
// Returns true if successful, or path already exists.
bool CreateDir(const std::string& path) {
NGLOG_TRACE(Common_Filesystem, "directory {}", path);
#ifdef _WIN32
if (::CreateDirectoryW(Common::UTF8ToUTF16W(path).c_str(), nullptr))
return true;
DWORD error = GetLastError();
if (error == ERROR_ALREADY_EXISTS) {
NGLOG_DEBUG(Common_Filesystem, "CreateDirectory failed on {}: already exists", path);
return true;
}
NGLOG_ERROR(Common_Filesystem, "CreateDirectory failed on {}: {}", path, error);
return false;
#else
if (mkdir(path.c_str(), 0755) == 0)
return true;
int err = errno;
if (err == EEXIST) {
NGLOG_DEBUG(Common_Filesystem, "mkdir failed on {}: already exists", path);
return true;
}
NGLOG_ERROR(Common_Filesystem, "mkdir failed on {}: {}", path, strerror(err));
return false;
#endif
}
// Creates the full path of fullPath returns true on success
bool CreateFullPath(const std::string& fullPath) {
int panicCounter = 100;
NGLOG_TRACE(Common_Filesystem, "path {}", fullPath);
if (FileUtil::Exists(fullPath)) {
NGLOG_DEBUG(Common_Filesystem, "path exists {}", fullPath);
return true;
}
size_t position = 0;
while (true) {
// Find next sub path
position = fullPath.find(DIR_SEP_CHR, position);
// we're done, yay!
if (position == fullPath.npos)
return true;
// Include the '/' so the first call is CreateDir("/") rather than CreateDir("")
std::string const subPath(fullPath.substr(0, position + 1));
if (!FileUtil::IsDirectory(subPath) && !FileUtil::CreateDir(subPath)) {
NGLOG_ERROR(Common, "CreateFullPath: directory creation failed");
return false;
}
// A safety check
panicCounter--;
if (panicCounter <= 0) {
NGLOG_ERROR(Common, "CreateFullPath: directory structure is too deep");
return false;
}
position++;
}
}
// Deletes a directory filename, returns true on success
bool DeleteDir(const std::string& filename) {
NGLOG_TRACE(Common_Filesystem, "directory {}", filename);
// check if a directory
if (!FileUtil::IsDirectory(filename)) {
NGLOG_ERROR(Common_Filesystem, "Not a directory {}", filename);
return false;
}
#ifdef _WIN32
if (::RemoveDirectoryW(Common::UTF8ToUTF16W(filename).c_str()))
return true;
#else
if (rmdir(filename.c_str()) == 0)
return true;
#endif
NGLOG_ERROR(Common_Filesystem, "failed {}: {}", filename, GetLastErrorMsg());
return false;
}
// renames file srcFilename to destFilename, returns true on success
bool Rename(const std::string& srcFilename, const std::string& destFilename) {
NGLOG_TRACE(Common_Filesystem, "{} --> {}", srcFilename, destFilename);
#ifdef _WIN32
if (_wrename(Common::UTF8ToUTF16W(srcFilename).c_str(),
Common::UTF8ToUTF16W(destFilename).c_str()) == 0)
return true;
#else
if (rename(srcFilename.c_str(), destFilename.c_str()) == 0)
return true;
#endif
NGLOG_ERROR(Common_Filesystem, "failed {} --> {}: {}", srcFilename, destFilename,
GetLastErrorMsg());
return false;
}
// copies file srcFilename to destFilename, returns true on success
bool Copy(const std::string& srcFilename, const std::string& destFilename) {
NGLOG_TRACE(Common_Filesystem, "{} --> {}", srcFilename, destFilename);
#ifdef _WIN32
if (CopyFileW(Common::UTF8ToUTF16W(srcFilename).c_str(),
Common::UTF8ToUTF16W(destFilename).c_str(), FALSE))
return true;
NGLOG_ERROR(Common_Filesystem, "failed {} --> {}: {}", srcFilename, destFilename,
GetLastErrorMsg());
return false;
#else
// buffer size
#define BSIZE 1024
char buffer[BSIZE];
// Open input file
FILE* input = fopen(srcFilename.c_str(), "rb");
if (!input) {
NGLOG_ERROR(Common_Filesystem, "opening input failed {} --> {}: {}", srcFilename,
destFilename, GetLastErrorMsg());
return false;
}
// open output file
FILE* output = fopen(destFilename.c_str(), "wb");
if (!output) {
fclose(input);
NGLOG_ERROR(Common_Filesystem, "opening output failed {} --> {}: {}", srcFilename,
destFilename, GetLastErrorMsg());
return false;
}
// copy loop
while (!feof(input)) {
// read input
size_t rnum = fread(buffer, sizeof(char), BSIZE, input);
if (rnum != BSIZE) {
if (ferror(input) != 0) {
NGLOG_ERROR(Common_Filesystem, "failed reading from source, {} --> {}: {}",
srcFilename, destFilename, GetLastErrorMsg());
goto bail;
}
}
// write output
size_t wnum = fwrite(buffer, sizeof(char), rnum, output);
if (wnum != rnum) {
NGLOG_ERROR(Common_Filesystem, "failed writing to output, {} --> {}: {}", srcFilename,
destFilename, GetLastErrorMsg());
goto bail;
}
}
// close files
fclose(input);
fclose(output);
return true;
bail:
if (input)
fclose(input);
if (output)
fclose(output);
return false;
#endif
}
// Returns the size of filename (64bit)
u64 GetSize(const std::string& filename) {
if (!Exists(filename)) {
NGLOG_ERROR(Common_Filesystem, "failed {}: No such file", filename);
return 0;
}
if (IsDirectory(filename)) {
NGLOG_ERROR(Common_Filesystem, "failed {}: is a directory", filename);
return 0;
}
struct stat buf;
#ifdef _WIN32
if (_wstat64(Common::UTF8ToUTF16W(filename).c_str(), &buf) == 0)
#else
if (stat(filename.c_str(), &buf) == 0)
#endif
{
NGLOG_TRACE(Common_Filesystem, "{}: {}", filename, buf.st_size);
return buf.st_size;
}
NGLOG_ERROR(Common_Filesystem, "Stat failed {}: {}", filename, GetLastErrorMsg());
return 0;
}
// Overloaded GetSize, accepts file descriptor
u64 GetSize(const int fd) {
struct stat buf;
if (fstat(fd, &buf) != 0) {
NGLOG_ERROR(Common_Filesystem, "GetSize: stat failed {}: {}", fd, GetLastErrorMsg());
return 0;
}
return buf.st_size;
}
// Overloaded GetSize, accepts FILE*
u64 GetSize(FILE* f) {
// can't use off_t here because it can be 32-bit
u64 pos = ftello(f);
if (fseeko(f, 0, SEEK_END) != 0) {
NGLOG_ERROR(Common_Filesystem, "GetSize: seek failed {}: {}", fmt::ptr(f),
GetLastErrorMsg());
return 0;
}
u64 size = ftello(f);
if ((size != pos) && (fseeko(f, pos, SEEK_SET) != 0)) {
NGLOG_ERROR(Common_Filesystem, "GetSize: seek failed {}: {}", fmt::ptr(f),
GetLastErrorMsg());
return 0;
}
return size;
}
// creates an empty file filename, returns true on success
bool CreateEmptyFile(const std::string& filename) {
NGLOG_TRACE(Common_Filesystem, "{}", filename);
if (!FileUtil::IOFile(filename, "wb")) {
NGLOG_ERROR(Common_Filesystem, "failed {}: {}", filename, GetLastErrorMsg());
return false;
}
return true;
}
bool ForeachDirectoryEntry(unsigned* num_entries_out, const std::string& directory,
DirectoryEntryCallable callback) {
NGLOG_TRACE(Common_Filesystem, "directory {}", directory);
// How many files + directories we found
unsigned found_entries = 0;
// Save the status of callback function
bool callback_error = false;
#ifdef _WIN32
// Find the first file in the directory.
WIN32_FIND_DATAW ffd;
HANDLE handle_find = FindFirstFileW(Common::UTF8ToUTF16W(directory + "\\*").c_str(), &ffd);
if (handle_find == INVALID_HANDLE_VALUE) {
FindClose(handle_find);
return false;
}
// windows loop
do {
const std::string virtual_name(Common::UTF16ToUTF8(ffd.cFileName));
#else
DIR* dirp = opendir(directory.c_str());
if (!dirp)
return false;
// non windows loop
while (struct dirent* result = readdir(dirp)) {
const std::string virtual_name(result->d_name);
#endif
if (virtual_name == "." || virtual_name == "..")
continue;
unsigned ret_entries = 0;
if (!callback(&ret_entries, directory, virtual_name)) {
callback_error = true;
break;
}
found_entries += ret_entries;
#ifdef _WIN32
} while (FindNextFileW(handle_find, &ffd) != 0);
FindClose(handle_find);
#else
}
closedir(dirp);
#endif
if (callback_error)
return false;
// num_entries_out is allowed to be specified nullptr, in which case we shouldn't try to set it
if (num_entries_out != nullptr)
*num_entries_out = found_entries;
return true;
}
unsigned ScanDirectoryTree(const std::string& directory, FSTEntry& parent_entry,
unsigned int recursion) {
const auto callback = [recursion, &parent_entry](unsigned* num_entries_out,
const std::string& directory,
const std::string& virtual_name) -> bool {
FSTEntry entry;
entry.virtualName = virtual_name;
entry.physicalName = directory + DIR_SEP + virtual_name;
if (IsDirectory(entry.physicalName)) {
entry.isDirectory = true;
// is a directory, lets go inside if we didn't recurse to often
if (recursion > 0) {
entry.size = ScanDirectoryTree(entry.physicalName, entry, recursion - 1);
*num_entries_out += (int)entry.size;
} else {
entry.size = 0;
}
} else { // is a file
entry.isDirectory = false;
entry.size = GetSize(entry.physicalName);
}
(*num_entries_out)++;
// Push into the tree
parent_entry.children.push_back(entry);
return true;
};
unsigned num_entries;
return ForeachDirectoryEntry(&num_entries, directory, callback) ? num_entries : 0;
}
bool DeleteDirRecursively(const std::string& directory, unsigned int recursion) {
const auto callback = [recursion](unsigned* num_entries_out, const std::string& directory,
const std::string& virtual_name) -> bool {
std::string new_path = directory + DIR_SEP_CHR + virtual_name;
if (IsDirectory(new_path)) {
if (recursion == 0)
return false;
return DeleteDirRecursively(new_path, recursion - 1);
}
return Delete(new_path);
};
if (!ForeachDirectoryEntry(nullptr, directory, callback))
return false;
// Delete the outermost directory
FileUtil::DeleteDir(directory);
return true;
}
// Create directory and copy contents (does not overwrite existing files)
void CopyDir(const std::string& source_path, const std::string& dest_path) {
#ifndef _WIN32
if (source_path == dest_path)
return;
if (!FileUtil::Exists(source_path))
return;
if (!FileUtil::Exists(dest_path))
FileUtil::CreateFullPath(dest_path);
DIR* dirp = opendir(source_path.c_str());
if (!dirp)
return;
while (struct dirent* result = readdir(dirp)) {
const std::string virtualName(result->d_name);
// check for "." and ".."
if (((virtualName[0] == '.') && (virtualName[1] == '\0')) ||
((virtualName[0] == '.') && (virtualName[1] == '.') && (virtualName[2] == '\0')))
continue;
std::string source, dest;
source = source_path + virtualName;
dest = dest_path + virtualName;
if (IsDirectory(source)) {
source += '/';
dest += '/';
if (!FileUtil::Exists(dest))
FileUtil::CreateFullPath(dest);
CopyDir(source, dest);
} else if (!FileUtil::Exists(dest))
FileUtil::Copy(source, dest);
}
closedir(dirp);
#endif
}
// Returns the current directory
std::string GetCurrentDir() {
// Get the current working directory (getcwd uses malloc)
#ifdef _WIN32
wchar_t* dir;
if (!(dir = _wgetcwd(nullptr, 0))) {
#else
char* dir;
if (!(dir = getcwd(nullptr, 0))) {
#endif
NGLOG_ERROR(Common_Filesystem, "GetCurrentDirectory failed: {}", GetLastErrorMsg());
return nullptr;
}
#ifdef _WIN32
std::string strDir = Common::UTF16ToUTF8(dir);
#else
std::string strDir = dir;
#endif
free(dir);
return strDir;
}
// Sets the current directory to the given directory
bool SetCurrentDir(const std::string& directory) {
#ifdef _WIN32
return _wchdir(Common::UTF8ToUTF16W(directory).c_str()) == 0;
#else
return chdir(directory.c_str()) == 0;
#endif
}
#if defined(__APPLE__)
std::string GetBundleDirectory() {
CFURLRef BundleRef;
char AppBundlePath[MAXPATHLEN];
// Get the main bundle for the app
BundleRef = CFBundleCopyBundleURL(CFBundleGetMainBundle());
CFStringRef BundlePath = CFURLCopyFileSystemPath(BundleRef, kCFURLPOSIXPathStyle);
CFStringGetFileSystemRepresentation(BundlePath, AppBundlePath, sizeof(AppBundlePath));
CFRelease(BundleRef);
CFRelease(BundlePath);
return AppBundlePath;
}
#endif
#ifdef _WIN32
std::string& GetExeDirectory() {
static std::string exe_path;
if (exe_path.empty()) {
wchar_t wchar_exe_path[2048];
GetModuleFileNameW(nullptr, wchar_exe_path, 2048);
exe_path = Common::UTF16ToUTF8(wchar_exe_path);
exe_path = exe_path.substr(0, exe_path.find_last_of('\\'));
}
return exe_path;
}
std::string AppDataRoamingDirectory() {
PWSTR pw_local_path = nullptr;
// Only supported by Windows Vista or later
SHGetKnownFolderPath(FOLDERID_RoamingAppData, 0, nullptr, &pw_local_path);
std::string local_path = Common::UTF16ToUTF8(pw_local_path);
CoTaskMemFree(pw_local_path);
return local_path;
}
#else
/**
* @return The users home directory on POSIX systems
*/
static const std::string& GetHomeDirectory() {
static std::string home_path;
if (home_path.empty()) {
const char* envvar = getenv("HOME");
if (envvar) {
home_path = envvar;
} else {
auto pw = getpwuid(getuid());
ASSERT_MSG(pw,
"$HOME isnt defined, and the current user cant be found in /etc/passwd.");
home_path = pw->pw_dir;
}
}
return home_path;
}
/**
* Follows the XDG Base Directory Specification to get a directory path
* @param envvar The XDG environment variable to get the value from
* @return The directory path
* @sa http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
*/
static const std::string GetUserDirectory(const std::string& envvar) {
const char* directory = getenv(envvar.c_str());
std::string user_dir;
if (directory) {
user_dir = directory;
} else {
std::string subdirectory;
if (envvar == "XDG_DATA_HOME")
subdirectory = DIR_SEP ".local" DIR_SEP "share";
else if (envvar == "XDG_CONFIG_HOME")
subdirectory = DIR_SEP ".config";
else if (envvar == "XDG_CACHE_HOME")
subdirectory = DIR_SEP ".cache";
else
ASSERT_MSG(false, "Unknown XDG variable %s.", envvar.c_str());
user_dir = GetHomeDirectory() + subdirectory;
}
ASSERT_MSG(!user_dir.empty(), "User directory %s musnt be empty.", envvar.c_str());
ASSERT_MSG(user_dir[0] == '/', "User directory %s must be absolute.", envvar.c_str());
return user_dir;
}
#endif
std::string GetSysDirectory() {
std::string sysDir;
#if defined(__APPLE__)
sysDir = GetBundleDirectory();
sysDir += DIR_SEP;
sysDir += SYSDATA_DIR;
#else
sysDir = SYSDATA_DIR;
#endif
sysDir += DIR_SEP;
NGLOG_DEBUG(Common_Filesystem, "Setting to {}:", sysDir);
return sysDir;
}
// Returns a string with a Citra data dir or file in the user's home
// directory. To be used in "multi-user" mode (that is, installed).
const std::string& GetUserPath(const unsigned int DirIDX, const std::string& newPath) {
static std::string paths[NUM_PATH_INDICES];
// Set up all paths and files on the first run
if (paths[D_USER_IDX].empty()) {
#ifdef _WIN32
paths[D_USER_IDX] = GetExeDirectory() + DIR_SEP USERDATA_DIR DIR_SEP;
if (!FileUtil::IsDirectory(paths[D_USER_IDX])) {
paths[D_USER_IDX] = AppDataRoamingDirectory() + DIR_SEP EMU_DATA_DIR DIR_SEP;
} else {
NGLOG_INFO(Common_Filesystem, "Using the local user directory");
}
paths[D_CONFIG_IDX] = paths[D_USER_IDX] + CONFIG_DIR DIR_SEP;
paths[D_CACHE_IDX] = paths[D_USER_IDX] + CACHE_DIR DIR_SEP;
#else
if (FileUtil::Exists(ROOT_DIR DIR_SEP USERDATA_DIR)) {
paths[D_USER_IDX] = ROOT_DIR DIR_SEP USERDATA_DIR DIR_SEP;
paths[D_CONFIG_IDX] = paths[D_USER_IDX] + CONFIG_DIR DIR_SEP;
paths[D_CACHE_IDX] = paths[D_USER_IDX] + CACHE_DIR DIR_SEP;
} else {
std::string data_dir = GetUserDirectory("XDG_DATA_HOME");
std::string config_dir = GetUserDirectory("XDG_CONFIG_HOME");
std::string cache_dir = GetUserDirectory("XDG_CACHE_HOME");
paths[D_USER_IDX] = data_dir + DIR_SEP EMU_DATA_DIR DIR_SEP;
paths[D_CONFIG_IDX] = config_dir + DIR_SEP EMU_DATA_DIR DIR_SEP;
paths[D_CACHE_IDX] = cache_dir + DIR_SEP EMU_DATA_DIR DIR_SEP;
}
#endif
paths[D_SDMC_IDX] = paths[D_USER_IDX] + SDMC_DIR DIR_SEP;
paths[D_NAND_IDX] = paths[D_USER_IDX] + NAND_DIR DIR_SEP;
paths[D_SYSDATA_IDX] = paths[D_USER_IDX] + SYSDATA_DIR DIR_SEP;
}
if (!newPath.empty()) {
if (!FileUtil::IsDirectory(newPath)) {
NGLOG_ERROR(Common_Filesystem, "Invalid path specified {}", newPath);
return paths[DirIDX];
} else {
paths[DirIDX] = newPath;
}
switch (DirIDX) {
case D_ROOT_IDX:
paths[D_USER_IDX] = paths[D_ROOT_IDX] + DIR_SEP;
break;
case D_USER_IDX:
paths[D_USER_IDX] = paths[D_ROOT_IDX] + DIR_SEP;
paths[D_CONFIG_IDX] = paths[D_USER_IDX] + CONFIG_DIR DIR_SEP;
paths[D_CACHE_IDX] = paths[D_USER_IDX] + CACHE_DIR DIR_SEP;
paths[D_SDMC_IDX] = paths[D_USER_IDX] + SDMC_DIR DIR_SEP;
paths[D_NAND_IDX] = paths[D_USER_IDX] + NAND_DIR DIR_SEP;
break;
}
}
return paths[DirIDX];
}
size_t WriteStringToFile(bool text_file, const std::string& str, const char* filename) {
return FileUtil::IOFile(filename, text_file ? "w" : "wb").WriteBytes(str.data(), str.size());
}
size_t ReadFileToString(bool text_file, const char* filename, std::string& str) {
IOFile file(filename, text_file ? "r" : "rb");
if (!file)
return false;
str.resize(static_cast<u32>(file.GetSize()));
return file.ReadArray(&str[0], str.size());
}
/**
* Splits the filename into 8.3 format
* Loosely implemented following https://en.wikipedia.org/wiki/8.3_filename
* @param filename The normal filename to use
* @param short_name A 9-char array in which the short name will be written
* @param extension A 4-char array in which the extension will be written
*/
void SplitFilename83(const std::string& filename, std::array<char, 9>& short_name,
std::array<char, 4>& extension) {
const std::string forbidden_characters = ".\"/\\[]:;=, ";
// On a FAT32 partition, 8.3 names are stored as a 11 bytes array, filled with spaces.
short_name = {{' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '\0'}};
extension = {{' ', ' ', ' ', '\0'}};
std::string::size_type point = filename.rfind('.');
if (point == filename.size() - 1)
point = filename.rfind('.', point);
// Get short name.
int j = 0;
for (char letter : filename.substr(0, point)) {
if (forbidden_characters.find(letter, 0) != std::string::npos)
continue;
if (j == 8) {
// TODO(Link Mauve): also do that for filenames containing a space.
// TODO(Link Mauve): handle multiple files having the same short name.
short_name[6] = '~';
short_name[7] = '1';
break;
}
short_name[j++] = toupper(letter);
}
// Get extension.
if (point != std::string::npos) {
j = 0;
for (char letter : filename.substr(point + 1, 3))
extension[j++] = toupper(letter);
}
}
IOFile::IOFile() {}
IOFile::IOFile(const std::string& filename, const char openmode[]) {
Open(filename, openmode);
}
IOFile::~IOFile() {
Close();
}
IOFile::IOFile(IOFile&& other) {
Swap(other);
}
IOFile& IOFile::operator=(IOFile&& other) {
Swap(other);
return *this;
}
void IOFile::Swap(IOFile& other) {
std::swap(m_file, other.m_file);
std::swap(m_good, other.m_good);
}
bool IOFile::Open(const std::string& filename, const char openmode[]) {
Close();
#ifdef _WIN32
_wfopen_s(&m_file, Common::UTF8ToUTF16W(filename).c_str(),
Common::UTF8ToUTF16W(openmode).c_str());
#else
m_file = fopen(filename.c_str(), openmode);
#endif
m_good = IsOpen();
return m_good;
}
bool IOFile::Close() {
if (!IsOpen() || 0 != std::fclose(m_file))
m_good = false;
m_file = nullptr;
return m_good;
}
u64 IOFile::GetSize() const {
if (IsOpen())
return FileUtil::GetSize(m_file);
return 0;
}
bool IOFile::Seek(s64 off, int origin) {
if (!IsOpen() || 0 != fseeko(m_file, off, origin))
m_good = false;
return m_good;
}
u64 IOFile::Tell() const {
if (IsOpen())
return ftello(m_file);
return -1;
}
bool IOFile::Flush() {
if (!IsOpen() || 0 != std::fflush(m_file))
m_good = false;
return m_good;
}
bool IOFile::Resize(u64 size) {
if (!IsOpen() || 0 !=
#ifdef _WIN32
// ector: _chsize sucks, not 64-bit safe
// F|RES: changed to _chsize_s. i think it is 64-bit safe
_chsize_s(_fileno(m_file), size)
#else
// TODO: handle 64bit and growing
ftruncate(fileno(m_file), size)
#endif
)
m_good = false;
return m_good;
}
} // namespace FileUtil