mirror of https://github.com/jackc/pgx.git
83 lines
1.6 KiB
Go
83 lines
1.6 KiB
Go
package pgproto3
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import (
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"bytes"
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"encoding/binary"
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"encoding/json"
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)
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type Parse struct {
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Name string
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Query string
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ParameterOIDs []uint32
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}
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func (*Parse) Frontend() {}
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func (dst *Parse) Decode(src []byte) error {
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buf := bytes.NewBuffer(src)
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b, err := buf.ReadBytes(0)
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if err != nil {
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return err
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}
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dst.Name = string(b[:len(b)-1])
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b, err = buf.ReadBytes(0)
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if err != nil {
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return err
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}
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dst.Query = string(b[:len(b)-1])
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if buf.Len() < 2 {
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return &invalidMessageFormatErr{messageType: "Parse"}
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}
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parameterOIDCount := int(binary.BigEndian.Uint16(buf.Next(2)))
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for i := 0; i < parameterOIDCount; i++ {
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if buf.Len() < 4 {
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return &invalidMessageFormatErr{messageType: "Parse"}
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}
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dst.ParameterOIDs = append(dst.ParameterOIDs, binary.BigEndian.Uint32(buf.Next(4)))
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}
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return nil
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}
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func (src *Parse) MarshalBinary() ([]byte, error) {
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var bigEndian BigEndianBuf
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buf := &bytes.Buffer{}
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buf.WriteByte('P')
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buf.Write(bigEndian.Uint32(0))
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buf.WriteString(src.Name)
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buf.WriteByte(0)
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buf.WriteString(src.Query)
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buf.WriteByte(0)
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buf.Write(bigEndian.Uint16(uint16(len(src.ParameterOIDs))))
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for _, v := range src.ParameterOIDs {
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buf.Write(bigEndian.Uint32(v))
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}
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binary.BigEndian.PutUint32(buf.Bytes()[1:5], uint32(buf.Len()-1))
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return buf.Bytes(), nil
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}
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func (src *Parse) MarshalJSON() ([]byte, error) {
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return json.Marshal(struct {
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Type string
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Name string
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Query string
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ParameterOIDs []uint32
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}{
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Type: "Parse",
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Name: src.Name,
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Query: src.Query,
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ParameterOIDs: src.ParameterOIDs,
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})
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}
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