Function BaseFile_Open

3rdParty/StormLib/src/FileStream.cpp:116–180

}

static bool BaseFile_Open(TFileStream * pStream, const TCHAR * szFileName, DWORD dwStreamFlags)
{
#ifdef PLATFORM_WINDOWS
    {
        ULARGE_INTEGER FileSize;
        DWORD dwWriteAccess = (dwStreamFlags & STREAM_FLAG_READ_ONLY) ? 0 : FILE_WRITE_DATA | FILE_APPEND_DATA | FILE_WRITE_ATTRIBUTES;
        DWORD dwWriteShare = (dwStreamFlags & STREAM_FLAG_WRITE_SHARE) ? FILE_SHARE_WRITE : 0;

        // Open the file
        pStream->Base.File.hFile = CreateFile(szFileName,
                                              FILE_READ_DATA | FILE_READ_ATTRIBUTES | dwWriteAccess,
                                              FILE_SHARE_READ | dwWriteShare,
                                              NULL,
                                              OPEN_EXISTING,
                                              0,
                                              NULL);
        if(pStream->Base.File.hFile == INVALID_HANDLE_VALUE)
            return false;

        // Query the file size
        FileSize.LowPart = GetFileSize(pStream->Base.File.hFile, &FileSize.HighPart);
        pStream->Base.File.FileSize = FileSize.QuadPart;

        // Query last write time
        GetFileTime(pStream->Base.File.hFile, NULL, NULL, (LPFILETIME)&pStream->Base.File.FileTime);
    }
#endif

#if defined(PLATFORM_MAC) || defined(PLATFORM_LINUX) || defined(PLATFORM_HAIKU) || defined(PLATFORM_AMIGA) || defined(PLATFORM_SWITCH)
    {
        struct stat64 fileinfo;
        int oflag = (dwStreamFlags & STREAM_FLAG_READ_ONLY) ? O_RDONLY : O_RDWR;
        intptr_t handle;

        // Open the file
        handle = open(szFileName, oflag | O_LARGEFILE);
        if(handle == -1)
        {
            nLastError = errno;
            pStream->Base.File.hFile = INVALID_HANDLE_VALUE; // BUGFIX (devilutionX)
            return false;
        }

        // Get the file size
        if(fstat64(handle, &fileinfo) == -1)
        {
            nLastError = errno;
            close(handle);
            pStream->Base.File.hFile = INVALID_HANDLE_VALUE; // BUGFIX (devilutionX)
            return false;
        }

        // time_t is number of seconds since 1.1.1970, UTC.
        // 1 second = 10000000 (decimal) in FILETIME
        // Set the start to 1.1.1970 00:00:00
        pStream->Base.File.FileTime = 0x019DB1DED53E8000ULL + (10000000 * fileinfo.st_mtime);
        pStream->Base.File.FileSize = (ULONGLONG)fileinfo.st_size;
        pStream->Base.File.hFile = (HANDLE)handle;