76 lines
1.7 KiB
Go
76 lines
1.7 KiB
Go
/*
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Copyright 2014 SAP SE
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package protocol
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import (
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"fmt"
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"github.com/SAP/go-hdb/internal/bufio"
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)
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const (
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messageHeaderSize = 32
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)
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//message header
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type messageHeader struct {
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sessionID int64
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packetCount int32
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varPartLength uint32
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varPartSize uint32
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noOfSegm int16
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}
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func (h *messageHeader) String() string {
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return fmt.Sprintf("session id %d packetCount %d varPartLength %d, varPartSize %d noOfSegm %d",
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h.sessionID,
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h.packetCount,
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h.varPartLength,
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h.varPartSize,
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h.noOfSegm)
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}
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func (h *messageHeader) write(wr *bufio.Writer) error {
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wr.WriteInt64(h.sessionID)
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wr.WriteInt32(h.packetCount)
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wr.WriteUint32(h.varPartLength)
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wr.WriteUint32(h.varPartSize)
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wr.WriteInt16(h.noOfSegm)
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wr.WriteZeroes(10) //messageHeaderSize
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if trace {
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outLogger.Printf("write message header: %s", h)
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}
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return nil
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}
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func (h *messageHeader) read(rd *bufio.Reader) error {
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h.sessionID = rd.ReadInt64()
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h.packetCount = rd.ReadInt32()
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h.varPartLength = rd.ReadUint32()
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h.varPartSize = rd.ReadUint32()
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h.noOfSegm = rd.ReadInt16()
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rd.Skip(10) //messageHeaderSize
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if trace {
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outLogger.Printf("read message header: %s", h)
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}
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return rd.GetError()
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}
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