Function FileStream_OpenFile

3rdParty/StormLib/src/FileStream.cpp:2414–2444

 */

TFileStream * FileStream_OpenFile(
    const TCHAR * szFileName,
    DWORD dwStreamFlags)
{
    DWORD dwProvider = dwStreamFlags & STREAM_PROVIDERS_MASK;
    size_t nPrefixLength = FileStream_Prefix(szFileName, &dwProvider);

    // Re-assemble the stream flags
    dwStreamFlags = (dwStreamFlags & STREAM_OPTIONS_MASK) | dwProvider;
    szFileName += nPrefixLength;

    // Perform provider-specific open
    switch(dwStreamFlags & STREAM_PROVIDER_MASK)
    {
        case STREAM_PROVIDER_FLAT:
            return FlatStream_Open(szFileName, dwStreamFlags);

        case STREAM_PROVIDER_PARTIAL:
            return PartStream_Open(szFileName, dwStreamFlags);

        case STREAM_PROVIDER_MPQE:
            return MpqeStream_Open(szFileName, dwStreamFlags);

        case STREAM_PROVIDER_BLOCK4:
            return Block4Stream_Open(szFileName, dwStreamFlags);

        default:
            SetLastError(ERROR_INVALID_PARAMETER);
            return NULL;
    }
}

/**
 * Returns the file name of the stream