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use nom::{*, Err::Error};
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14214
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use std::str;
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use super::messages::{*, EngineMessage::*, UnsyncedEngineMessage::*, SyncedEngineMessage::*, ConfigEngineMessage::*, KeystrokeAction::*};
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macro_rules! eof_slice (
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($i:expr,) => (
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{
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if ($i).input_len() == 0 {
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Ok(($i, $i))
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} else {
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Err(Error(error_position!($i, ErrorKind::Eof::<u32>)))
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}
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}
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);
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);
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named!(unrecognized_message<&[u8], EngineMessage>,
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do_parse!(rest >> (Unknown))
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);
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named!(string_tail<&[u8], String>, map!(map_res!(rest, str::from_utf8), String::from));
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named!(length_without_timestamp<&[u8], usize>,
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map_opt!(rest_len, |l| if l > 2 { Some(l - 2) } else { None } )
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);
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named!(synced_message<&[u8], SyncedEngineMessage>, alt!(
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do_parse!(tag!("L") >> (Left(Press)))
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| do_parse!(tag!("l") >> ( Left(Release) ))
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| do_parse!(tag!("R") >> ( Right(Press) ))
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| do_parse!(tag!("r") >> ( Right(Release) ))
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| do_parse!(tag!("U") >> ( Up(Press) ))
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| do_parse!(tag!("u") >> ( Up(Release) ))
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| do_parse!(tag!("D") >> ( Down(Press) ))
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| do_parse!(tag!("d") >> ( Down(Release) ))
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| do_parse!(tag!("Z") >> ( Precise(Press) ))
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| do_parse!(tag!("z") >> ( Precise(Release) ))
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| do_parse!(tag!("A") >> ( Attack(Press) ))
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| do_parse!(tag!("a") >> ( Attack(Release) ))
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| do_parse!(tag!("N") >> ( NextTurn ))
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| do_parse!(tag!("j") >> ( LongJump ))
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| do_parse!(tag!("J") >> ( HighJump ))
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| do_parse!(tag!("S") >> ( Switch ))
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| do_parse!(tag!(",") >> ( Skip ))
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| do_parse!(tag!("1") >> ( Timer(1) ))
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| do_parse!(tag!("2") >> ( Timer(2) ))
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| do_parse!(tag!("3") >> ( Timer(3) ))
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| do_parse!(tag!("4") >> ( Timer(4) ))
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| do_parse!(tag!("5") >> ( Timer(5) ))
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| do_parse!(tag!("p") >> x: be_i24 >> y: be_i24 >> ( Put(x, y) ))
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| do_parse!(tag!("P") >> x: be_i24 >> y: be_i24 >> ( CursorMove(x, y) ))
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| do_parse!(tag!("f") >> s: string_tail >> ( SyncedEngineMessage::TeamControlLost(s) ))
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| do_parse!(tag!("g") >> s: string_tail >> ( SyncedEngineMessage::TeamControlGained(s) ))
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/*
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Slot(u8),
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SetWeapon(u8),
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*/
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));
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named!(unsynced_message<&[u8], UnsyncedEngineMessage>, alt!(
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do_parse!(tag!("?") >> (Ping))
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| do_parse!(tag!("!") >> (Ping))
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| do_parse!(tag!("esay ") >> s: string_tail >> (Say(s)))
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));
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named!(config_message<&[u8], ConfigEngineMessage>, alt!(
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do_parse!(tag!("C") >> (ConfigRequest))
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));
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named!(timestamped_message<&[u8], (SyncedEngineMessage, u16)>,
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do_parse!(msg: length_value!(length_without_timestamp, terminated!(synced_message, eof_slice!()))
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>> timestamp: be_u16
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>> ((msg, timestamp))
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)
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);
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named!(unwrapped_message<&[u8], EngineMessage>,
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alt!(
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map!(timestamped_message, |(m, t)| Synced(m, t as u32))
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| do_parse!(tag!("#") >> (Synced(TimeWrap, 65535)))
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| map!(unsynced_message, |m| Unsynced(m))
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| map!(config_message, |m| Config(m))
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| unrecognized_message
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));
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named!(length_specifier<&[u8], u16>, alt!(
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verify!(map!(take!(1), |a : &[u8]| a[0] as u16), |l| l < 64)
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| map!(take!(2), |a| (a[0] as u16 - 64) * 256 + a[1] as u16 + 64)
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)
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);
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named!(empty_message<&[u8], EngineMessage>,
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do_parse!(tag!("\0") >> (Empty))
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);
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named!(non_empty_message<&[u8], EngineMessage>,
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length_value!(length_specifier, terminated!(unwrapped_message, eof_slice!())));
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named!(message<&[u8], EngineMessage>, alt!(
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empty_message
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| non_empty_message
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)
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);
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named!(pub extract_messages<&[u8], Vec<EngineMessage> >, many0!(complete!(message)));
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#[test]
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fn parse_length() {
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assert_eq!(length_specifier(b"\x01"), Ok((&b""[..], 1)));
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assert_eq!(length_specifier(b"\x00"), Ok((&b""[..], 0)));
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assert_eq!(length_specifier(b"\x3f"), Ok((&b""[..], 63)));
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assert_eq!(length_specifier(b"\x40\x00"), Ok((&b""[..], 64)));
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assert_eq!(length_specifier(b"\xff\xff"), Ok((&b""[..], 49215)));
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}
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#[test]
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fn parse_synced_messages() {
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assert_eq!(message(b"\x03L\x01\x02"), Ok((&b""[..], Synced(Left(Press), 258))));
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assert_eq!(message(b"\x01#"), Ok((&b""[..], Synced(TimeWrap, 65535))));
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}
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#[test]
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fn parse_unsynced_messages() {
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assert_eq!(message(b"\x0aesay hello"), Ok((&b""[..], Unsynced(Say(String::from("hello"))))));
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}
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#[test]
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fn parse_incorrect_messages() {
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assert_eq!(message(b"\x00"), Ok((&b""[..], Empty)));
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assert_eq!(message(b"\x01\x00"), Ok((&b""[..], Unknown)));
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// garbage after correct message
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assert_eq!(message(b"\x04La\x01\x02"), Ok((&b""[..], Unknown)));
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}
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#[test]
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fn parse_config_messages() {
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assert_eq!(
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message(b"\x01C"),
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Ok((
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&b""[..],
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Config(ConfigRequest)
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))
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);
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}
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#[test]
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fn parse_test_general() {
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assert_eq!(string_tail(b"abc"), Ok((&b""[..], String::from("abc"))));
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}
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