Method writeCompressedPacket

compress.go:197–213

writeCompressedPacket writes a compressed packet with header. data should start with 7 size space for header followed by payload.

(data []byte, uncompressedLen int)

// writeCompressedPacket writes a compressed packet with header.
// data should start with 7 size space for header followed by payload.
func (c *compIO) writeCompressedPacket(data []byte, uncompressedLen int) (int, error) {
	mc := c.mc
	comprLength := len(data) - 7
	if debug {
		fmt.Printf(
			"writeCompressedPacket: comprLength=%v, uncompressedLen=%v, seq=%v\n",
			comprLength, uncompressedLen, mc.compressSequence)
	}

	// compression header
	putUint24(data[0:3], comprLength)
	data[3] = mc.compressSequence
	putUint24(data[4:7], uncompressedLen)

	mc.compressSequence++
	return mc.writeWithTimeout(data)
}