package pgproto3 import ( "bytes" "encoding/json" "github.com/jackc/pgio" ) type Query struct { String string } // Frontend identifies this message as sendable by a PostgreSQL frontend. func (*Query) Frontend() {} // Decode decodes src into dst. src must contain the complete message with the exception of the initial 1 byte message // type identifier and 4 byte message length. func (dst *Query) Decode(src []byte) error { i := bytes.IndexByte(src, 0) if i != len(src)-1 { return &invalidMessageFormatErr{messageType: "Query"} } dst.String = string(src[:i]) return nil } // Encode encodes src into dst. dst will include the 1 byte message type identifier and the 4 byte message length. func (src *Query) Encode(dst []byte) []byte { dst = append(dst, 'Q') dst = pgio.AppendInt32(dst, int32(4+len(src.String)+1)) dst = append(dst, src.String...) dst = append(dst, 0) return dst } // MarshalJSON implements encoding/json.Marshaler. func (src Query) MarshalJSON() ([]byte, error) { return json.Marshal(struct { Type string String string }{ Type: "Query", String: src.String, }) }