From 519f778aec45721769bba379d713600111486473 Mon Sep 17 00:00:00 2001
From: 13981712066 <piyongcai@163.com>
Date: Tue, 23 Nov 2021 16:16:27 +0800
Subject: [PATCH] add MsgPack Marshal And Unmarshal function

---
 decimal_gen.go | 172 ++-----------------------------------------------
 1 file changed, 6 insertions(+), 166 deletions(-)

diff --git a/decimal_gen.go b/decimal_gen.go
index 117bf0e..4378102 100644
--- a/decimal_gen.go
+++ b/decimal_gen.go
@@ -4,28 +4,15 @@ import (
 	"errors"
 )
 
-// const (
-// 	first3 = 0xe0
-// 	last5  = 0x1f
-//
-// 	mfixstr uint8 = 0xa0
-// 	mstr8   uint8 = 0xd9
-// 	mstr16  uint8 = 0xda
-// 	mstr32  uint8 = 0xdb
-//
-// 	stringPrefixSize = 5
-// )
-
 var (
 	errShortBytes = errors.New("msgp: too few bytes left to read object")
-	//bigEndian     = binary.BigEndian
 )
 
 
 // MarshalMsg implements msgp.Marshaler
-func (z Decimal) MarshalMsg(b []byte) (o []byte, err error) {
-	o = require(b, z.Msgsize())
-	str := z.String()
+func (d Decimal) MarshalMsg(b []byte) (o []byte, err error) {
+	o = require(b, d.Msgsize())
+	str := d.String()
 	sz := len(str)
 	if sz > 30 {
 		sz = 30
@@ -44,7 +31,7 @@ func (z Decimal) MarshalMsg(b []byte) (o []byte, err error) {
 }
 
 // UnmarshalMsg implements msgp.Unmarshaler
-func (z *Decimal) UnmarshalMsg(b []byte) (o []byte, err error) {
+func (d *Decimal) UnmarshalMsg(b []byte) (o []byte, err error) {
 	l := len(b)
 	if l < 1 {
 		return nil, errShortBytes
@@ -55,44 +42,16 @@ func (z *Decimal) UnmarshalMsg(b []byte) (o []byte, err error) {
 		err = errShortBytes
 		return
 	}
-	if *z, err = NewFromString(string(b[1 : sz+1])); err == nil {
+	if *d, err = NewFromString(string(b[1 : sz+1])); err == nil {
 		o = b[sz:]
 	}
 	return
 }
 
 // Msgsize returns an upper bound estimate of the number of bytes occupied by the serialized message
-func (z Decimal) Msgsize() int {
+func (d Decimal) Msgsize() int {
 	return 31
 }
-//
-// // MarshalMsg implements msgp.Marshaler
-// func (z Decimal) MarshalMsg(b []byte) (o []byte, err error) {
-// 	o = require(b, z.Msgsize())
-// 	o = appendString(o, z.String())
-// 	return
-// }
-//
-// // UnmarshalMsg implements msgp.Unmarshaler
-// func (z *Decimal) UnmarshalMsg(b []byte) (o []byte, err error) {
-// 	v, bts, err := readString(b)
-// 	if err != nil {
-// 		return
-// 	}
-// 	d, err := NewFromString(string(v))
-// 	if err == nil {
-// 		*z = d
-// 		o = bts
-// 	}
-//
-// 	return
-// }
-//
-// // Msgsize returns an upper bound estimate of the number of bytes occupied by the serialized message
-// func (z Decimal) Msgsize() (s int) {
-// 	s = stringPrefixSize + len(z.String())
-// 	return
-// }
 
 // Require ensures that cap(old)-len(old) >= extra.
 func require(old []byte, extra int) []byte {
@@ -129,122 +88,3 @@ func ensure(b []byte, sz int) ([]byte, int) {
 	}
 	return b[:l+sz], l
 }
-
-// // AppendString appends a string as a MessagePack 'str' to the slice
-// func appendString(b []byte, s string) []byte {
-// 	sz := len(s)
-// 	var n int
-// 	var o []byte
-// 	switch {
-// 	case sz <= 31:
-// 		o, n = ensure(b, 1+sz)
-// 		o[n] = wfixstr(uint8(sz))
-// 		n++
-// 	case sz <= math.MaxUint8:
-// 		o, n = ensure(b, 2+sz)
-// 		prefixu8(o[n:], mstr8, uint8(sz))
-// 		n += 2
-// 	case sz <= math.MaxUint16:
-// 		o, n = ensure(b, 3+sz)
-// 		prefixu16(o[n:], mstr16, uint16(sz))
-// 		n += 3
-// 	default:
-// 		o, n = ensure(b, 5+sz)
-// 		prefixu32(o[n:], mstr32, uint32(sz))
-// 		n += 5
-// 	}
-// 	return o[:n+copy(o[n:], s)]
-// }
-//
-// func wfixstr(u uint8) byte {
-// 	return (u & last5) | mfixstr
-// }
-//
-// // write prefix and uint8
-// func prefixu8(b []byte, pre byte, sz uint8) {
-// 	b[0] = pre
-// 	b[1] = sz
-// }
-//
-// // write prefix and big-endian uint16
-// func prefixu16(b []byte, pre byte, sz uint16) {
-// 	b[0] = pre
-// 	b[1] = byte(sz >> 8)
-// 	b[2] = byte(sz)
-// }
-//
-// // write prefix and big-endian uint32
-// func prefixu32(b []byte, pre byte, sz uint32) {
-// 	b[0] = pre
-// 	b[1] = byte(sz >> 24)
-// 	b[2] = byte(sz >> 16)
-// 	b[3] = byte(sz >> 8)
-// 	b[4] = byte(sz)
-// }
-//
-// // readString reads a messagepack string field
-// // without copying. The returned []byte points
-// // to the same memory as the input slice.
-// // Possible errors:
-// // - ErrShortBytes (b not long enough)
-// func readString(b []byte) (v []byte, o []byte, err error) {
-// 	l := len(b)
-// 	if l < 1 {
-// 		return nil, nil, ErrShortBytes
-// 	}
-//
-// 	lead := b[0]
-// 	var read int
-//
-// 	if isfixstr(lead) {
-// 		read = int(rfixstr(lead))
-// 		b = b[1:]
-// 	} else {
-// 		switch lead {
-// 		case mstr8:
-// 			if l < 2 {
-// 				err = ErrShortBytes
-// 				return
-// 			}
-// 			read = int(b[1])
-// 			b = b[2:]
-//
-// 		case mstr16:
-// 			if l < 3 {
-// 				err = ErrShortBytes
-// 				return
-// 			}
-// 			read = int(bigEndian.Uint16(b[1:]))
-// 			b = b[3:]
-//
-// 		case mstr32:
-// 			if l < 5 {
-// 				err = ErrShortBytes
-// 				return
-// 			}
-// 			read = int(bigEndian.Uint32(b[1:]))
-// 			b = b[5:]
-//
-// 		default:
-// 			err = fmt.Errorf(`msgp: attempted to decode type 'str' with method for %d`, lead)
-// 			return
-// 		}
-// 	}
-//
-// 	if len(b) < read {
-// 		err = ErrShortBytes
-// 		return
-// 	}
-//
-// 	v = b[0:read]
-// 	o = b[read:]
-// 	return
-// }
-//
-// func isfixstr(b byte) bool {
-// 	return b&first3 == mfixstr
-// }
-//
-// func rfixstr(b byte) uint8 {
-// 	return b & last5
-// }