Import to pgx main repo in pgtype subdir

pgtype/zzz.generic_binary.go

@@ -0,0 +1,35 @@
+package pgtype
+
+import "fmt"
+
+func (GenericBinary) BinaryFormatSupported() bool {
+	return true
+}
+
+func (GenericBinary) TextFormatSupported() bool {
+	return true
+}
+
+func (GenericBinary) PreferredFormat() int16 {
+	return BinaryFormatCode
+}
+
+func (dst *GenericBinary) DecodeResult(ci *ConnInfo, oid uint32, format int16, src []byte) error {
+	switch format {
+	case BinaryFormatCode:
+		return dst.DecodeBinary(ci, src)
+	case TextFormatCode:
+		return fmt.Errorf("text format not supported for %T", dst)
+	}
+	return fmt.Errorf("unknown format code %d", format)
+}
+
+func (src GenericBinary) EncodeParam(ci *ConnInfo, oid uint32, format int16, buf []byte) (newBuf []byte, err error) {
+	switch format {
+	case BinaryFormatCode:
+		return src.EncodeBinary(ci, buf)
+	case TextFormatCode:
+		return nil, fmt.Errorf("text format not supported for %T", src)
+	}
+	return nil, fmt.Errorf("unknown format code %d", format)
+}