use uint64 as package length

Author: fanweixiao

pkg/spec/decode.go

@@ -31,12 +31,12 @@ func FromBytes(buf []byte) (p *Packet, err error) {
 	if err != nil {
 		return nil, err
 	}
-	p.Length = int(length)
+	p.Length = length
 	p.lenbuf = buf[pos:cursor]
 	pos = cursor
 
 	// read Value bytes
-	cursor = pos + p.Length
+	cursor = pos + int(p.Length)
 	if cursor > len(buf) {
 		return nil, errors.New("malformed valbuf")
 	}
@@ -111,7 +111,7 @@ func (p *Packet) GetValueAsInt64() (int64, error) {
 // GetValueAsFloat32 decode value as uint32
 func (p *Packet) GetValueAsFloat32() (float32, error) {
 	var val float32
-	codec := encoding.VarCodec{Size: p.Length}
+	codec := encoding.VarCodec{Size: int(p.Length)}
 	err := codec.DecodeVarFloat32(p.valbuf, &val)
 	return val, err
 }
@@ -128,7 +128,7 @@ func (p *Packet) GetValueAsBool() (bool, error) {
 // GetValueAsFloat64 decode value as float64
 func (p *Packet) GetValueAsFloat64() (float64, error) {
 	var val float64
-	codec := encoding.VarCodec{Size: p.Length}
+	codec := encoding.VarCodec{Size: int(p.Length)}
 	err := codec.DecodeVarFloat64(p.valbuf, &val)
 	return val, err
 }

pkg/spec/encode.go

@@ -6,12 +6,20 @@ import (
 
 // NewPacket create new Packet object
 func NewPacket(sid uint64) (*Packet, error) {
-	var p = &Packet{Tag: sid}
+	var p = &Packet{}
 	tmp, err := writePVarUInt64Buffer(sid)
 	p.tagbuf = tmp
 	return p, err
 }
 
+// NewRawPacket create new Packet object with
+func NewRawPacket(rawID []byte) (*Packet, error) {
+	// TODO, validate rawID
+	var p = &Packet{}
+	p.tagbuf = rawID
+	return p, nil
+}
+
 func (p *Packet) setLengthBuffer() error {
 	len := uint64(p.Length)
 	tmp, err := writePVarUInt64Buffer(len)
@@ -141,7 +149,7 @@ func (p *Packet) AddNode(child *Packet) (*Packet, error) {
 
 // Encode return whole bytes of this packet
 func (p *Packet) Encode() ([]byte, error) {
-	p.Length = len(p.valbuf)
+	p.Length = uint64(len(p.valbuf))
 	err := p.setLengthBuffer()
 	if err != nil {
 		return nil, err

pkg/spec/packet.go

@@ -3,7 +3,7 @@ package spec
 // Packet is a TLV group
 type Packet struct {
 	Tag    uint64
-	Length int
+	Length uint64
 	tagbuf []byte
 	lenbuf []byte
 	valbuf []byte