gopkg/pgx
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Replace MarshalBinary with Encode

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This new approach can avoid allocations.
This commit is contained in:
Jack Christensen
2017-05-26 17:00:44 -05:00
parent b1934ad4c2
commit d6312305ae
35 changed files with 277 additions and 285 deletions
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row_description.go
+17 -18
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@@ -4,6 +4,8 @@ import (
"bytes"
"encoding/binary"
"encoding/json"
"github.com/jackc/pgx/pgio"
)
const (
@@ -64,30 +66,27 @@ func (dst *RowDescription) Decode(src []byte) error {
return nil
}
func (src *RowDescription) MarshalBinary() ([]byte, error) {
var bigEndian BigEndianBuf
buf := &bytes.Buffer{}
buf.WriteByte('T')
buf.Write(bigEndian.Uint32(0))
buf.Write(bigEndian.Uint16(uint16(len(src.Fields))))
func (src *RowDescription) Encode(dst []byte) []byte {
dst = append(dst, 'T')
sp := len(dst)
dst = pgio.AppendInt32(dst, -1)
dst = pgio.AppendUint16(dst, uint16(len(src.Fields)))
for _, fd := range src.Fields {
buf.WriteString(fd.Name)
buf.WriteByte(0)
dst = append(dst, fd.Name...)
dst = append(dst, 0)
buf.Write(bigEndian.Uint32(fd.TableOID))
buf.Write(bigEndian.Uint16(fd.TableAttributeNumber))
buf.Write(bigEndian.Uint32(fd.DataTypeOID))
buf.Write(bigEndian.Uint16(uint16(fd.DataTypeSize)))
buf.Write(bigEndian.Uint32(fd.TypeModifier))
buf.Write(bigEndian.Uint16(uint16(fd.Format)))
dst = pgio.AppendUint32(dst, fd.TableOID)
dst = pgio.AppendUint16(dst, fd.TableAttributeNumber)
dst = pgio.AppendUint32(dst, fd.DataTypeOID)
dst = pgio.AppendInt16(dst, fd.DataTypeSize)
dst = pgio.AppendUint32(dst, fd.TypeModifier)
dst = pgio.AppendInt16(dst, fd.Format)
}
binary.BigEndian.PutUint32(buf.Bytes()[1:5], uint32(buf.Len()-1))
pgio.SetInt32(dst[sp:], int32(len(dst[sp:])))
return buf.Bytes(), nil
return dst
}
func (src *RowDescription) MarshalJSON() ([]byte, error) {