C++ UTF8ToTStr函数代码示例

// renames file srcFilename to destFilename, returns true on success
bool Rename(const std::string &srcFilename, const std::string &destFilename)
{
	INFO_LOG(COMMON, "Rename: %s --> %s",
			srcFilename.c_str(), destFilename.c_str());
#ifdef _WIN32
	auto sf = UTF8ToTStr(srcFilename);
	auto df = UTF8ToTStr(destFilename);
	// The Internet seems torn about whether ReplaceFile is atomic or not.
	// Hopefully it's atomic enough...
	if (ReplaceFile(df.c_str(), sf.c_str(), nullptr, REPLACEFILE_IGNORE_MERGE_ERRORS, nullptr, nullptr))
		return true;
	// Might have failed because the destination doesn't exist.
	if (GetLastError() == ERROR_FILE_NOT_FOUND)
	{
		if (MoveFile(sf.c_str(), df.c_str()))
			return true;
	}
#else
	if (rename(srcFilename.c_str(), destFilename.c_str()) == 0)
		return true;
#endif
	ERROR_LOG(COMMON, "Rename: failed %s --> %s: %s",
			  srcFilename.c_str(), destFilename.c_str(), GetLastErrorMsg());
	return false;
}

bool IOFile::Open(const std::string& filename, const char openmode[])
{
	Close();
#ifdef _WIN32
	_tfopen_s(&m_file, UTF8ToTStr(filename).c_str(), UTF8ToTStr(openmode).c_str());
#else
	m_file = fopen(filename.c_str(), openmode);
#endif

	m_good = IsOpen();
	return m_good;
}

// Default non library dependent panic alert
bool DefaultMsgHandler(const char* caption, const char* text, bool yes_no, int Style)
{
#ifdef _WIN32
    int STYLE = MB_ICONINFORMATION;
    if (Style == QUESTION) STYLE = MB_ICONQUESTION;
    if (Style == WARNING) STYLE = MB_ICONWARNING;

    return IDYES == MessageBox(0, UTF8ToTStr(text).c_str(), UTF8ToTStr(caption).c_str(), STYLE | (yes_no ? MB_YESNO : MB_OK));
#else
    printf("%s\n", text);
    return true;
#endif
}

// Returns true if successful, or path already exists.
bool CreateDir(const std::string &path)
{
	INFO_LOG(COMMON, "CreateDir: directory %s", path.c_str());
#ifdef _WIN32
	if (::CreateDirectory(UTF8ToTStr(path).c_str(), NULL))
		return true;
	DWORD error = GetLastError();
	if (error == ERROR_ALREADY_EXISTS)
	{
		WARN_LOG(COMMON, "CreateDir: CreateDirectory failed on %s: already exists", path.c_str());
		return true;
	}
	ERROR_LOG(COMMON, "CreateDir: CreateDirectory failed on %s: %i", path.c_str(), error);
	return false;
#else
	if (mkdir(path.c_str(), 0755) == 0)
		return true;

	int err = errno;

	if (err == EEXIST)
	{
		WARN_LOG(COMMON, "CreateDir: mkdir failed on %s: already exists", path.c_str());
		return true;
	}

	ERROR_LOG(COMMON, "CreateDir: mkdir failed on %s: %s", path.c_str(), strerror(err));
	return false;
#endif
}

// Returns the size of filename (64bit)
u64 GetSize(const std::string &filename)
{
	if (!Exists(filename))
	{
		WARN_LOG(COMMON, "GetSize: failed %s: No such file", filename.c_str());
		return 0;
	}

	if (IsDirectory(filename))
	{
		WARN_LOG(COMMON, "GetSize: failed %s: is a directory", filename.c_str());
		return 0;
	}
	
	struct stat64 buf;
#ifdef _WIN32
	if (_tstat64(UTF8ToTStr(filename).c_str(), &buf) == 0)
#else
	if (stat64(filename.c_str(), &buf) == 0)
#endif
	{
		DEBUG_LOG(COMMON, "GetSize: %s: %lld",
				filename.c_str(), (long long)buf.st_size);
		return buf.st_size;
	}

	ERROR_LOG(COMMON, "GetSize: Stat failed %s: %s",
			filename.c_str(), GetLastErrorMsg());
	return 0;
}

// Deletes a directory filename, returns true on success
bool DeleteDir(const std::string& filename)
{
  INFO_LOG(COMMON, "DeleteDir: directory %s", filename.c_str());

  // check if a directory
  if (!IsDirectory(filename))
  {
    ERROR_LOG(COMMON, "DeleteDir: Not a directory %s", filename.c_str());
    return false;
  }

#ifdef _WIN32
  if (::RemoveDirectory(UTF8ToTStr(filename).c_str()))
    return true;
  ERROR_LOG(COMMON, "DeleteDir: RemoveDirectory failed on %s: %s", filename.c_str(),
            GetLastErrorString().c_str());
#else
  if (rmdir(filename.c_str()) == 0)
    return true;
  ERROR_LOG(COMMON, "DeleteDir: rmdir failed on %s: %s", filename.c_str(),
            LastStrerrorString().c_str());
#endif

  return false;
}

void MemArena::GrabSHMSegment(size_t size)
{
#ifdef _WIN32
  const std::string name = "dolphin-emu." + std::to_string(GetCurrentProcessId());
  hMemoryMapping = CreateFileMapping(INVALID_HANDLE_VALUE, nullptr, PAGE_READWRITE, 0,
                                     static_cast<DWORD>(size), UTF8ToTStr(name).c_str());
#elif defined(ANDROID)
  fd = AshmemCreateFileMapping(("dolphin-emu." + std::to_string(getpid())).c_str(), size);
  if (fd < 0)
  {
    NOTICE_LOG(MEMMAP, "Ashmem allocation failed");
    return;
  }
#else
  const std::string file_name = "/dolphin-emu." + std::to_string(getpid());
  fd = shm_open(file_name.c_str(), O_RDWR | O_CREAT | O_EXCL, 0600);
  if (fd == -1)
  {
    ERROR_LOG(MEMMAP, "shm_open failed: %s", strerror(errno));
    return;
  }
  shm_unlink(file_name.c_str());
  if (ftruncate(fd, size) < 0)
    ERROR_LOG(MEMMAP, "Failed to allocate low memory space");
#endif
}

// Create directory and copy contents (does not overwrite existing files)
void CopyDir(const std::string& source_path, const std::string& dest_path, bool destructive)
{
  if (source_path == dest_path)
    return;
  if (!Exists(source_path))
    return;
  if (!Exists(dest_path))
    File::CreateFullPath(dest_path);

#ifdef _WIN32
  WIN32_FIND_DATA ffd;
  HANDLE hFind = FindFirstFile(UTF8ToTStr(source_path + "\\*").c_str(), &ffd);

  if (hFind == INVALID_HANDLE_VALUE)
  {
    FindClose(hFind);
    return;
  }

  do
  {
    const std::string virtualName(TStrToUTF8(ffd.cFileName));
#else
  DIR* dirp = opendir(source_path.c_str());
  if (!dirp)
    return;

  while (dirent* result = readdir(dirp))
  {
    const std::string virtualName(result->d_name);
#endif
    // check for "." and ".."
    if (virtualName == "." || virtualName == "..")
      continue;

    std::string source = source_path + DIR_SEP + virtualName;
    std::string dest = dest_path + DIR_SEP + virtualName;
    if (IsDirectory(source))
    {
      if (!Exists(dest))
        File::CreateFullPath(dest + DIR_SEP);
      CopyDir(source, dest, destructive);
    }
    else if (!destructive && !Exists(dest))
    {
      Copy(source, dest);
    }
    else if (destructive)
    {
      Rename(source, dest);
    }
#ifdef _WIN32
  } while (FindNextFile(hFind, &ffd) != 0);
  FindClose(hFind);
#else
  }
  closedir(dirp);
#endif
}

// copies file source_path to destination_path, returns true on success
bool Copy(const std::string& source_path, const std::string& destination_path)
{
  INFO_LOG(COMMON, "Copy: %s --> %s", source_path.c_str(), destination_path.c_str());
#ifdef _WIN32
  if (CopyFile(UTF8ToTStr(source_path).c_str(), UTF8ToTStr(destination_path).c_str(), FALSE))
    return true;

  ERROR_LOG(COMMON, "Copy: failed %s --> %s: %s", source_path.c_str(), destination_path.c_str(),
            GetLastErrorString().c_str());
  return false;
#else
  std::ifstream source{source_path, std::ios::binary};
  std::ofstream destination{destination_path, std::ios::binary};
  destination << source.rdbuf();
  return source.good() && destination.good();
#endif
}

// Default non library dependent panic alert
bool DefaultMsgHandler(const char* caption, const char* text, bool yes_no, int Style)
{
#ifdef _WIN32
  int STYLE = MB_ICONINFORMATION;
  if (Style == QUESTION)
    STYLE = MB_ICONQUESTION;
  if (Style == WARNING)
    STYLE = MB_ICONWARNING;

  return IDYES == MessageBox(0, UTF8ToTStr(text).c_str(), UTF8ToTStr(caption).c_str(),
                             STYLE | (yes_no ? MB_YESNO : MB_OK));
#else
  fprintf(stderr, "%s\n", text);

  // Return no to any question (which will in general crash the emulator)
  return false;
#endif
}

// Create directory and copy contents (does not overwrite existing files)
void CopyDir(const std::string &source_path, const std::string &dest_path)
{
    if (source_path == dest_path) return;
    if (!File::Exists(source_path)) return;
    if (!File::Exists(dest_path)) File::CreateFullPath(dest_path);

#ifdef _WIN32
    WIN32_FIND_DATA ffd;
    HANDLE hFind = FindFirstFile(UTF8ToTStr(source_path + "\\*").c_str(), &ffd);

    if (hFind == INVALID_HANDLE_VALUE)
    {
        FindClose(hFind);
        return;
    }

    do
    {
        const std::string virtualName(TStrToUTF8(ffd.cFileName));
#else
    struct dirent dirent, *result = NULL;
    DIR *dirp = opendir(source_path.c_str());
    if (!dirp) return;

    while (!readdir_r(dirp, &dirent, &result) && result)
    {
        const std::string virtualName(result->d_name);
#endif
        // check for "." and ".."
        if (virtualName == "." || virtualName == "..")
            continue;

        std::string source, dest;
        source = source_path + virtualName;
        dest = dest_path + virtualName;
        if (IsDirectory(source))
        {
            source += '/';
            dest += '/';
            if (!File::Exists(dest)) File::CreateFullPath(dest);
            CopyDir(source, dest);
        }
        else if (!File::Exists(dest)) File::Copy(source, dest);
#ifdef _WIN32
    }
    while (FindNextFile(hFind, &ffd) != 0);
    FindClose(hFind);
#else
    }
    closedir(dirp);
#endif
}

std::string GetTempFilenameForAtomicWrite(const std::string &path)
{
	std::string abs = path;
#ifdef _WIN32
	TCHAR absbuf[MAX_PATH];
	if (_tfullpath(absbuf, UTF8ToTStr(path).c_str(), MAX_PATH) != nullptr)
		abs = TStrToUTF8(absbuf);
#else
	char absbuf[PATH_MAX];
	if (realpath(path.c_str(), absbuf) != nullptr)
		abs = absbuf;
#endif
	return abs + ".xxx";
}

bool RenameSync(const std::string &srcFilename, const std::string &destFilename)
{
	if (!Rename(srcFilename, destFilename))
		return false;
#ifdef _WIN32
	int fd = _topen(UTF8ToTStr(srcFilename).c_str(), _O_RDONLY);
	if (fd != -1)
	{
		_commit(fd);
		close(fd);
	}
#else
	char *path = strdup(srcFilename.c_str());
	FSyncPath(path);
	FSyncPath(dirname(path));
	free(path);
	path = strdup(destFilename.c_str());
	FSyncPath(dirname(path));
	free(path);
#endif
	return true;
}

// Deletes a given filename, return true on success
// Doesn't supports deleting a directory
bool Delete(const std::string& filename)
{
  INFO_LOG(COMMON, "Delete: file %s", filename.c_str());

  const FileInfo file_info(filename);

  // Return true because we care about the file no
  // being there, not the actual delete.
  if (!file_info.Exists())
  {
    WARN_LOG(COMMON, "Delete: %s does not exist", filename.c_str());
    return true;
  }

  // We can't delete a directory
  if (file_info.IsDirectory())
  {
    WARN_LOG(COMMON, "Delete failed: %s is a directory", filename.c_str());
    return false;
  }

#ifdef _WIN32
  if (!DeleteFile(UTF8ToTStr(filename).c_str()))
  {
    WARN_LOG(COMMON, "Delete: DeleteFile failed on %s: %s", filename.c_str(),
             GetLastErrorMsg().c_str());
    return false;
  }
#else
  if (unlink(filename.c_str()) == -1)
  {
    WARN_LOG(COMMON, "Delete: unlink failed on %s: %s", filename.c_str(),
             GetLastErrorMsg().c_str());
    return false;
  }
#endif

  return true;
}

// 100, 100, "Dolphin Log Console"
// Open console window - width and height is the size of console window
// Name is the window title
void ConsoleListener::Open(bool Hidden, int Width, int Height, const char *Title)
{
#ifdef _WIN32
	if (!GetConsoleWindow())
	{
		// Open the console window and create the window handle for GetStdHandle()
		AllocConsole();
		// Hide
		if (Hidden) ShowWindow(GetConsoleWindow(), SW_HIDE);
		// Save the window handle that AllocConsole() created
		hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
		// Set the console window title
		SetConsoleTitle(UTF8ToTStr(Title).c_str());
		// Set letter space
		LetterSpace(80, 4000);
		//MoveWindow(GetConsoleWindow(), 200,200, 800,800, true);
	}
	else
	{
		hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
	}
#endif
}