增加websocket支持

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

@@ -5,9 +5,7 @@ import (
 	"encoding/binary"
 	"encoding/hex"
 	"encoding/json"
-	"errors"
 	"fmt"
-	"math"
 
 	"github.com/jackc/pgx/v5/internal/pgio"
 )
@@ -110,25 +108,21 @@ func (dst *Bind) 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 *Bind) Encode(dst []byte) ([]byte, error) {
-	dst, sp := beginMessage(dst, 'B')
+func (src *Bind) Encode(dst []byte) []byte {
+	dst = append(dst, 'B')
+	sp := len(dst)
+	dst = pgio.AppendInt32(dst, -1)
 
 	dst = append(dst, src.DestinationPortal...)
 	dst = append(dst, 0)
 	dst = append(dst, src.PreparedStatement...)
 	dst = append(dst, 0)
 
-	if len(src.ParameterFormatCodes) > math.MaxUint16 {
-		return nil, errors.New("too many parameter format codes")
-	}
 	dst = pgio.AppendUint16(dst, uint16(len(src.ParameterFormatCodes)))
 	for _, fc := range src.ParameterFormatCodes {
 		dst = pgio.AppendInt16(dst, fc)
 	}
 
-	if len(src.Parameters) > math.MaxUint16 {
-		return nil, errors.New("too many parameters")
-	}
 	dst = pgio.AppendUint16(dst, uint16(len(src.Parameters)))
 	for _, p := range src.Parameters {
 		if p == nil {
@@ -140,15 +134,14 @@ func (src *Bind) Encode(dst []byte) ([]byte, error) {
 		dst = append(dst, p...)
 	}
 
-	if len(src.ResultFormatCodes) > math.MaxUint16 {
-		return nil, errors.New("too many result format codes")
-	}
 	dst = pgio.AppendUint16(dst, uint16(len(src.ResultFormatCodes)))
 	for _, fc := range src.ResultFormatCodes {
 		dst = pgio.AppendInt16(dst, fc)
 	}
 
-	return finishMessage(dst, sp)
+	pgio.SetInt32(dst[sp:], int32(len(dst[sp:])))
+
+	return dst
 }
 
 // MarshalJSON implements encoding/json.Marshaler.