private byte[] in;
    private int inLen;

    public MimeMap() throws IOException {
        int n;

        in = new byte[IN_SIZE];
        InputStream is = getClass().getClassLoader().getResourceAsStream( "jcifs/smb1/util/mime.map" );

        inLen = 0;
        while(( n = is.read( in, inLen, IN_SIZE - inLen )) != -1 ) {
            inLen += n;
        }
        if( inLen < 100 || inLen == IN_SIZE ) {