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vendor/github.com/jackc/pgx/v5/pgproto3/parameter_description.go

@@ -4,6 +4,8 @@ import (
 	"bytes"
 	"encoding/binary"
 	"encoding/json"
+	"errors"
+	"math"
 
 	"github.com/jackc/pgx/v5/internal/pgio"
 )
@@ -39,19 +41,18 @@ func (dst *ParameterDescription) Decode(src []byte) error {
 }
 
 // Encode encodes src into dst. dst will include the 1 byte message type identifier and the 4 byte message length.
-func (src *ParameterDescription) Encode(dst []byte) []byte {
-	dst = append(dst, 't')
-	sp := len(dst)
-	dst = pgio.AppendInt32(dst, -1)
+func (src *ParameterDescription) Encode(dst []byte) ([]byte, error) {
+	dst, sp := beginMessage(dst, 't')
 
+	if len(src.ParameterOIDs) > math.MaxUint16 {
+		return nil, errors.New("too many parameter oids")
+	}
 	dst = pgio.AppendUint16(dst, uint16(len(src.ParameterOIDs)))
 	for _, oid := range src.ParameterOIDs {
 		dst = pgio.AppendUint32(dst, oid)
 	}
 
-	pgio.SetInt32(dst[sp:], int32(len(dst[sp:])))
-
-	return dst
+	return finishMessage(dst, sp)
 }
 
 // MarshalJSON implements encoding/json.Marshaler.