--- a/rust/hedgewars-engine-messages/src/parser.rs Wed Nov 14 11:09:01 2018 +0100
+++ b/rust/hedgewars-engine-messages/src/parser.rs Wed Nov 14 16:32:42 2018 +0100
@@ -1,13 +1,9 @@
-use nom::*;
+use nom::{*};
use std::str;
use super::messages::{*, EngineMessage::*, UnsyncedEngineMessage::*, SyncedEngineMessage::*, ConfigEngineMessage::*, KeystrokeAction::*};
-named!(length_specifier<&[u8], u16>, alt!(
- verify!(map!(take!(1), |a : &[u8]| a[0] as u16), |l| l < 64)
- | map!(take!(2), |a| (a[0] as u16 - 64) * 256 + a[1] as u16 + 64)
- )
-);
+
named!(unrecognized_message<&[u8], EngineMessage>,
do_parse!(rest >> (Unknown))
@@ -15,10 +11,21 @@
named!(string_tail<&[u8], String>, map!(map_res!(rest, str::from_utf8), String::from));
+named!(length_without_timestamp<&[u8], usize>,
+ map_opt!(rest_len, |l| if l > 2 { Some(l - 2) } else { None } )
+);
+
named!(synced_message<&[u8], SyncedEngineMessage>, alt!(
- do_parse!(tag!("+l") >> (Left(Press)))
+ do_parse!(tag!("L") >> (Left(Press)))
));
+named!(timestamped_message<&[u8], (SyncedEngineMessage, u16)>,
+ do_parse!(msg: length_value!(length_without_timestamp, synced_message)
+ >> timestamp: be_u16
+ >> ((msg, timestamp))
+ )
+);
+
named!(unsynced_message<&[u8], UnsyncedEngineMessage>, alt!(
do_parse!(tag!("?") >> (Ping))
| do_parse!(tag!("!") >> (Ping))
@@ -29,18 +36,29 @@
do_parse!(tag!("C") >> (ConfigRequest))
));
+named!(unwrapped_message<&[u8], EngineMessage>,
+ alt!(
+ map!(timestamped_message, |(m, t)| Synced(m, t as u32))
+ | do_parse!(tag!("#") >> (Synced(TimeWrap, 65535)))
+ | map!(unsynced_message, |m| Unsynced(m))
+ | map!(config_message, |m| Config(m))
+ | unrecognized_message
+));
+
+
+
+named!(length_specifier<&[u8], u16>, alt!(
+ verify!(map!(take!(1), |a : &[u8]| a[0] as u16), |l| l < 64)
+ | map!(take!(2), |a| (a[0] as u16 - 64) * 256 + a[1] as u16 + 64)
+ )
+);
+
named!(empty_message<&[u8], EngineMessage>,
do_parse!(tag!("\0") >> (Empty))
);
-named!(non_empty_message<&[u8], EngineMessage>, length_value!(length_specifier,
- alt!(
- map!(synced_message, |m| Synced(m, 0))
- | map!(unsynced_message, |m| Unsynced(m))
- | map!(config_message, |m| Config(m))
- | unrecognized_message
- )
-));
+named!(non_empty_message<&[u8], EngineMessage>,
+ length_value!(length_specifier, unwrapped_message));
named!(message<&[u8], EngineMessage>, alt!(
empty_message
@@ -61,7 +79,7 @@
#[test]
fn parse_synced_messages() {
- assert_eq!(message(b"\x04+l\x01\x01"), Ok((&b""[..], Synced(Left(Press), 0))));
+ assert_eq!(message(b"\x03L\x01\x02"), Ok((&b""[..], Synced(Left(Press), 258))));
}
#[test]