Method encodeListPackInt

core/stream.go:762–813

encodeListPackInt encodes an integer for listpack

(val int64)

// encodeListPackInt encodes an integer for listpack
func (enc *Encoder) encodeListPackInt(val int64) []byte {
	if val >= -127 && val <= 127 {
		// 0xxxxxxx, uint7
		return []byte{byte(val)}
	} else if val >= -8191 && val <= 8191 {
		// 110xxxxx yyyyyyyy, int13
		uval := uint16(val)
		if val < 0 {
			uval = uint16(8191 + val + 1)
		}
		return []byte{
			byte(0xC0 | (uval >> 8)),
			byte(uval & 0xFF),
		}
	} else if val >= -32767 && val <= 32767 {
		// 11110001 aaaaaaaa bbbbbbbb, int16
		uval := uint16(val)
		return []byte{
			0xF1,
			byte(uval & 0xFF),
			byte(uval >> 8),
		}
	} else if val >= -8388607 && val <= 8388607 {
		// 11110010 aaaaaaaa bbbbbbbb cccccccc, int24
		uval := uint32(val)
		return []byte{
			0xF2,
			byte(uval & 0xFF),
			byte((uval >> 8) & 0xFF),
			byte((uval >> 16) & 0xFF),
		}
	} else if val >= -2147483647 && val <= 2147483647 {
		// 11110011 aaaaaaaa bbbbbbbb cccccccc dddddddd, int32
		uval := uint32(val)
		return []byte{
			0xF3,
			byte(uval & 0xFF),
			byte((uval >> 8) & 0xFF),
			byte((uval >> 16) & 0xFF),
			byte((uval >> 24) & 0xFF),
		}
	} else {
		// 11110100 8Byte -> int64
		uval := uint64(val)
		result := []byte{0xF4}
		for i := 0; i < 8; i++ {
			result = append(result, byte(uval&0xFF))
			uval >>= 8
		}
		return result
	}
}

// encodeListPackString encodes a string for listpack
func (enc *Encoder) encodeListPackString(s string) []byte {