func FormatBinaryTime(n int, data []byte) ([]byte, error) {
	if n == 0 {
		return []byte("0000-00-00"), nil
	}
	var sign byte
	if data[0] == 1 {
		sign = byte('-')
	}
	switch n {
	case 8:
		return []byte(fmt.Sprintf(
			"%c%02d:%02d:%02d",
			sign,
			uint16(data[1])*24+uint16(data[5]),
			data[6],
			data[7],
		)), nil
	case 12:
		return []byte(fmt.Sprintf(
			"%c%02d:%02d:%02d.%06d",
			sign,
			uint16(data[1])*24+uint16(data[5]),
			data[6],
			data[7],
			binary.LittleEndian.Uint32(data[8:12]),
		)), nil
	default:
		return nil, fmt.Errorf("invalid time packet length %d", n)
	}
}
FormatBinaryTime format binary time type
package mysql
import (
	"bytes"
	"encoding/binary"
	"fmt"
	"math"
	"strconv"
	"time"
	"github.com/nooncall/shazam/util/hack"
)
func LenEncIntSize(i uint64) int {
	switch {
	case i < 251:
		return 1
	case i < 1<<16:
		return 3
	case i < 1<<24:
		return 4
	default:
		return 9
	}
}
func WriteLenEncInt(data []byte, pos int, i uint64) int {
	switch {
	case i < 251:
		data[pos] = byte(i)
		return pos + 1
	case i < 1<<16:
		data[pos] = 0xfc
		data[pos+1] = byte(i)
		data[pos+2] = byte(i >> 8)
		return pos + 3
	case i < 1<<24:
		data[pos] = 0xfd
		data[pos+1] = byte(i)
		data[pos+2] = byte(i >> 8)
		data[pos+3] = byte(i >> 16)
		return pos + 4
	default:
		data[pos] = 0xfe
		data[pos+1] = byte(i)
		data[pos+2] = byte(i >> 8)
		data[pos+3] = byte(i >> 16)
		data[pos+4] = byte(i >> 24)
		data[pos+5] = byte(i >> 32)
		data[pos+6] = byte(i >> 40)
		data[pos+7] = byte(i >> 48)
		data[pos+8] = byte(i >> 56)
		return pos + 9
	}
}
func AppendLenEncInt(data []byte, i uint64) []byte {
	switch {
	case i <= 250:
		return append(data, byte(i))
	case i <= 0xffff:
		return append(data, 0xfc, byte(i), byte(i>>8))
	case i <= 0xffffff:
		return append(data, 0xfd, byte(i), byte(i>>8), byte(i>>16))
	case i <= 0xffffffffffffffff:
		return append(data, 0xfe, byte(i), byte(i>>8), byte(i>>16), byte(i>>24),
			byte(i>>32), byte(i>>40), byte(i>>48), byte(i>>56))
	}
	return data
}
func LenNullString(value string) int {
	return len(value) + 1
}
func WriteNullString(data []byte, pos int, value string) int {
	pos += copy(data[pos:], value)
	data[pos] = 0
	return pos + 1
}
func writeEOFString(data []byte, pos int, value string) int {
	pos += copy(data[pos:], value)
	return pos
}
func WriteByte(data []byte, pos int, value byte) int {
	data[pos] = value
	return pos + 1
}
func WriteUint16(data []byte, pos int, value uint16) int {
	data[pos] = byte(value)
	data[pos+1] = byte(value >> 8)
	return pos + 2
}
func AppendUint16(data []byte, n uint16) []byte {
	data = append(data, byte(n))
	data = append(data, byte(n>>8))
	return data
}
func WriteUint32(data []byte, pos int, value uint32) int {
	data[pos] = byte(value)
	data[pos+1] = byte(value >> 8)
	data[pos+2] = byte(value >> 16)
	data[pos+3] = byte(value >> 24)
	return pos + 4
}
func AppendUint32(data []byte, n uint32) []byte {
	data = append(data, byte(n))
	data = append(data, byte(n>>8))
	data = append(data, byte(n>>16))
	data = append(data, byte(n>>24))
	return data
}
func WriteUint64(data []byte, pos int, value uint64) int {
	data[pos] = byte(value)
	data[pos+1] = byte(value >> 8)
	data[pos+2] = byte(value >> 16)
	data[pos+3] = byte(value >> 24)
	data[pos+4] = byte(value >> 32)
	data[pos+5] = byte(value >> 40)
	data[pos+6] = byte(value >> 48)
	data[pos+7] = byte(value >> 56)
	return pos + 8
}
func AppendUint64(data []byte, n uint64) []byte {
	data = append(data, byte(n))
	data = append(data, byte(n>>8))
	data = append(data, byte(n>>16))
	data = append(data, byte(n>>24))
	data = append(data, byte(n>>32))
	data = append(data, byte(n>>40))
	data = append(data, byte(n>>48))
	data = append(data, byte(n>>56))
	return data
}
func LenEncStringSize(value string) int {
	l := len(value)
	return LenEncIntSize(uint64(l)) + l
}
func WriteLenEncString(data []byte, pos int, value string) int {
	pos = WriteLenEncInt(data, pos, uint64(len(value)))
	return writeEOFString(data, pos, value)
}
func AppendLenEncStringBytes(data, b []byte) []byte {
	data = AppendLenEncInt(data, uint64(len(b)))
	data = append(data, b...)
	return data
}
func WriteZeroes(data []byte, pos int, len int) int {
	for i := 0; i < len; i++ {
		data[pos+i] = 0
	}
	return pos + len
}
func ReadByte(data []byte, pos int) (byte, int, bool) {
	if pos >= len(data) {
		return 0, 0, false
	}
	return data[pos], pos + 1, true
}
func ReadBytes(data []byte, pos int, size int) ([]byte, int, bool) {
	if pos+size-1 >= len(data) {
		return nil, 0, false
	}
	return data[pos : pos+size], pos + size, true
}
func ReadBytesCopy(data []byte, pos int, size int) ([]byte, int, bool) {
	if pos+size-1 >= len(data) {
		return nil, 0, false
	}
	result := make([]byte, size)
	copy(result, data[pos:pos+size])
	return result, pos + size, true
}
func ReadNullString(data []byte, pos int) (string, int, bool) {
	end := bytes.IndexByte(data[pos:], 0)
	if end == -1 {
		return "", 0, false
	}
	return string(data[pos : pos+end]), pos + end + 1, true
}
func ReadUint16(data []byte, pos int) (uint16, int, bool) {
	if pos+1 >= len(data) {
		return 0, 0, false
	}
	return binary.LittleEndian.Uint16(data[pos : pos+2]), pos + 2, true
}
func ReadUint32(data []byte, pos int) (uint32, int, bool) {
	if pos+3 >= len(data) {
		return 0, 0, false
	}
	return binary.LittleEndian.Uint32(data[pos : pos+4]), pos + 4, true
}
func ReadUint64(data []byte, pos int) (uint64, int, bool) {
	if pos+7 >= len(data) {
		return 0, 0, false
	}
	return binary.LittleEndian.Uint64(data[pos : pos+8]), pos + 8, true
}
func ReadLenEncInt(data []byte, pos int) (uint64, int, bool, bool) {
	isNull := false
	if pos >= len(data) {
		return 0, 0, isNull, false
	}
	switch data[pos] {
	case 0xfb:
		isNull = true
		return 0, pos + 1, isNull, true
	case 0xfc:
		if pos+2 >= len(data) {
			return 0, 0, isNull, false
		}
		return uint64(data[pos+1]) |
			uint64(data[pos+2])<<8, pos + 3, isNull, true
	case 0xfd:
		if pos+3 >= len(data) {
			return 0, 0, isNull, false
		}
		return uint64(data[pos+1]) |
			uint64(data[pos+2])<<8 |
			uint64(data[pos+3])<<16, pos + 4, isNull, true
	case 0xfe:
		if pos+8 >= len(data) {
			return 0, 0, isNull, false
		}
		return uint64(data[pos+1]) |
			uint64(data[pos+2])<<8 |
			uint64(data[pos+3])<<16 |
			uint64(data[pos+4])<<24 |
			uint64(data[pos+5])<<32 |
			uint64(data[pos+6])<<40 |
			uint64(data[pos+7])<<48 |
			uint64(data[pos+8])<<56, pos + 9, isNull, true
	}
	return uint64(data[pos]), pos + 1, isNull, true
}
func readLenEncString(data []byte, pos int) (string, int, bool) {
	size, pos, _, ok := ReadLenEncInt(data, pos)
	if !ok {
		return "", 0, false
	}
	s := int(size)
	if pos+s-1 >= len(data) {
		return "", 0, false
	}
	return string(data[pos : pos+s]), pos + s, true
}
func skipLenEncString(data []byte, pos int) (int, bool) {
	size, pos, _, ok := ReadLenEncInt(data, pos)
	if !ok {
		return 0, false
	}
	s := int(size)
	if pos+s-1 >= len(data) {
		return 0, false
	}
	return pos + s, true
}
func ReadLenEncStringAsBytes(data []byte, pos int) ([]byte, int, bool, bool) {
	size, pos, isNull, ok := ReadLenEncInt(data, pos)
	if !ok {
		return nil, 0, isNull, false
	}
	s := int(size)
	if pos+s-1 >= len(data) {
		return nil, 0, isNull, false
	}
	return data[pos : pos+s], pos + s, isNull, true
}
func FormatBinaryDate(n int, data []byte) ([]byte, error) {
	switch n {
	case 0:
		return []byte("0000-00-00"), nil
	case 4:
		return []byte(fmt.Sprintf("%04d-%02d-%02d",
			binary.LittleEndian.Uint16(data[:2]),
			data[2],
			data[3])), nil
	default:
		return nil, fmt.Errorf("invalid date packet length %d", n)
	}
}
func FormatBinaryDateTime(n int, data []byte) ([]byte, error) {
	switch n {
	case 0:
		return []byte("0000-00-00 00:00:00"), nil
	case 4:
		return []byte(fmt.Sprintf("%04d-%02d-%02d 00:00:00",
			binary.LittleEndian.Uint16(data[:2]),
			data[2],
			data[3])), nil
	case 7:
		return []byte(fmt.Sprintf(
			"%04d-%02d-%02d %02d:%02d:%02d",
			binary.LittleEndian.Uint16(data[:2]),
			data[2],
			data[3],
			data[4],
			data[5],
			data[6])), nil
	case 11:
		return []byte(fmt.Sprintf(
			"%04d-%02d-%02d %02d:%02d:%02d.%06d",
			binary.LittleEndian.Uint16(data[:2]),
			data[2],
			data[3],
			data[4],
			data[5],
			data[6],
			binary.LittleEndian.Uint32(data[7:11]))), nil
	default:
		return nil, fmt.Errorf("invalid datetime packet length %d", n)
	}
}