optimize: replace make([]byte, 0) with nil

Author: fumiama

client/auth/sig.go

@@ -44,8 +44,8 @@ func init() {
 }
 
 func (sig *SigInfo) ClearSession() {
-	sig.D2 = make([]byte, 0)
-	sig.Tgt = make([]byte, 0)
+	sig.D2 = nil
+	sig.Tgt = nil
 	sig.D2Key = make([]byte, 16)
 }
 

client/packets/oidb/group_record_upload.go

@@ -64,10 +64,10 @@ func BuildGroupRecordUploadReq(groupUin uint32, record *message.VoiceElement) (*
 					TextSummary: record.Summary,
 				},
 				Video: &oidb.VideoExtBizInfo{
-					BytesPbReserve: make([]byte, 0),
+					BytesPbReserve: nil,
 				},
 				Ptt: &oidb.PttExtBizInfo{
-					BytesReserve:      make([]byte, 0),
+					BytesReserve:      nil,
 					BytesPbReserve:    []byte{0x08, 0x00, 0x38, 0x00},
 					BytesGeneralFlags: []byte{0x9a, 0x01, 0x07, 0xaa, 0x03, 0x04, 0x08, 0x08, 0x12, 0x00},
 				},

utils/binary/reader.go

@@ -145,7 +145,7 @@ func (r *Reader) ReadBytesNoCopy(length int) (v []byte) {
 	}
 	// 确保缓冲区有足够的数据
 	if r.pos+length > len(r.buffer) {
-		return make([]byte, 0)
+		return nil
 	}
 	v = r.buffer[r.pos : r.pos+length]
 	r.pos += length
@@ -159,12 +159,12 @@ func (r *Reader) ReadBytes(length int) (v []byte) {
 		n, err := io.ReadFull(r.reader, v)
 		if err != nil || n < length {
 			// 读取失败或读取的数据不足，返回空数组
-			return make([]byte, 0)
+			return nil
 		}
 	} else {
 		// 确保缓冲区有足够的数据
 		if r.pos+length > len(r.buffer) {
-			return make([]byte, 0)
+			return nil
 		}
 		copy(v, r.buffer[r.pos:r.pos+length])
 		r.pos += length