parameterCount = Math.min( totalParameterCount, available );
            available -= parameterCount;

            dataOffset = parameterOffset + parameterCount;
            pad1 = dataOffset % PADDING_SIZE;
            pad1 = pad1 == 0 ? 0 : PADDING_SIZE - pad1;
            dataOffset += pad1;

            totalDataCount = writeDataWireFormat( txn_buf, bufDataOffset );

            this.parameterCount = Math.min(this.totalParameterCount, available);
            available -= this.parameterCount;

            this.dataOffset = this.parameterOffset + this.parameterCount;
            this.pad2 = this.pad(this.dataOffset);
            this.dataOffset += this.pad2;

            this.totalDataCount = writeDataWireFormat(this.txn_buf, this.bufDataOffset);

                int off = HEADER_LENGTH;
                                    /* WordCount thru dataOffset always 27 */
                readn( in, BUF, 4 + off, 27 ); off += 27;
                resp.decode( BUF, 4 );
                                              /* EMC can send pad w/o data */
                int pad = r.dataOffset - off;
                if (r.byteCount > 0 && pad > 0 && pad < 4)

func (rc *ReadCloser) Close() error {
	return rc.f.Close()
}

// DataOffset returns the offset of the file's possibly-compressed
// data, relative to the beginning of the zip file.
//
// Most callers should instead use [File.Open], which transparently
// decompresses data and verifies checksums.
func (f *File) DataOffset() (offset int64, err error) {
	bodyOffset, err := f.findBodyOffset()
	if err != nil {