mirror of https://github.com/jackc/pgx.git
65 lines
1.4 KiB
Go
65 lines
1.4 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 CopyOutResponse struct {
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OverallFormat byte
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ColumnFormatCodes []uint16
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}
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func (*CopyOutResponse) Backend() {}
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func (dst *CopyOutResponse) Decode(src []byte) error {
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buf := bytes.NewBuffer(src)
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if buf.Len() < 3 {
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return &invalidMessageFormatErr{messageType: "CopyOutResponse"}
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}
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overallFormat := buf.Next(1)[0]
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columnCount := int(binary.BigEndian.Uint16(buf.Next(2)))
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if buf.Len() != columnCount*2 {
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return &invalidMessageFormatErr{messageType: "CopyOutResponse"}
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}
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columnFormatCodes := make([]uint16, columnCount)
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for i := 0; i < columnCount; i++ {
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columnFormatCodes[i] = binary.BigEndian.Uint16(buf.Next(2))
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}
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*dst = CopyOutResponse{OverallFormat: overallFormat, ColumnFormatCodes: columnFormatCodes}
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return nil
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}
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func (src *CopyOutResponse) MarshalBinary() ([]byte, error) {
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var bigEndian BigEndianBuf
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buf := &bytes.Buffer{}
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buf.WriteByte('H')
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buf.Write(bigEndian.Uint32(uint32(4 + 1 + 2 + 2*len(src.ColumnFormatCodes))))
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buf.Write(bigEndian.Uint16(uint16(len(src.ColumnFormatCodes))))
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for _, fc := range src.ColumnFormatCodes {
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buf.Write(bigEndian.Uint16(fc))
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}
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return buf.Bytes(), nil
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}
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func (src *CopyOutResponse) MarshalJSON() ([]byte, error) {
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return json.Marshal(struct {
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Type string
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ColumnFormatCodes []uint16
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}{
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Type: "CopyOutResponse",
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ColumnFormatCodes: src.ColumnFormatCodes,
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})
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}
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