func writeBulkArg(w io.Writer, arg []byte) error {
sw := ioutils.SimpleWriter(w)
sw.Write([]byte{'$'})
sw.Write(Itoa(len(arg)))
sw.Write(NEW_LINE)
sw.Write(arg)
_, err := sw.Write(NEW_LINE)
return errors.Trace(err)
}
func WriteCmdKeys(w io.Writer, op string, keys [][]byte) error {
sw := ioutils.SimpleWriter(w)
sw.Write([]byte{'*'})
sw.Write(Itoa(len(keys) + 1))
sw.Write(NEW_LINE)
err := writeBulkArg(sw, []byte(op))
for _, key := range keys {
err = writeBulkArg(sw, key)
}
return errors.Trace(err)
}
func WriteCommand(w io.Writer, cmd string, args ...interface{}) error {
sw := ioutils.SimpleWriter(w)
sw.Write([]byte{'*'})
sw.Write(Itoa(len(args) + 1))
sw.Write(NEW_LINE)
err := writeBulkArg(sw, []byte(cmd))
for _, arg := range args {
err = writeBulkArg(sw, formatCommandArg(arg))
}
return errors.Trace(err)
}