func (p *parser) dispatch(depth int, buf *streambuf.Buffer) (string, bool, bool, bool) {
if buf.Len() == 0 {
return "", false, true, false
}
var value string
var iserror, ok, complete bool
snapshot := buf.Snapshot()
switch buf.Bytes()[0] {
case '*':
value, iserror, ok, complete = p.parseArray(depth, buf)
case '$':
value, ok, complete = p.parseString(buf)
case ':':
value, ok, complete = p.parseInt(buf)
case '+':
value, ok, complete = p.parseSimpleString(buf)
case '-':
iserror = true
value, ok, complete = p.parseSimpleString(buf)
default:
debug("Unexpected message starting with %s", buf.Bytes()[0])
return "", false, false, false
}
if !ok || !complete {
buf.Restore(snapshot)
}
return value, iserror, ok, complete
}
func (parser *parser) parse(buf *streambuf.Buffer) (bool, bool) {
snapshot := buf.Snapshot()
content, iserror, ok, complete := parser.dispatch(0, buf)
if !ok || !complete {
// on error or incomplete message drop all parsing progress, due to
// parse not being statefull among multiple calls
// => parser needs to restart parsing all content
buf.Restore(snapshot)
return ok, complete
}
parser.message.IsError = iserror
parser.message.Size = buf.BufferConsumed()
parser.message.Message = content
return true, true
}