rust/hedgewars-server/src/protocol.rs
author unc0rr
Sun, 16 Dec 2018 00:12:29 +0100
changeset 14478 98ef2913ec73
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child 14796 09d46ab83361
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use netbuf;
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use nom::{Err, IResult};
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use std::io::{Read, Result};
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pub mod messages;
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mod parser;
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#[cfg(test)]
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pub mod test;
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pub struct ProtocolDecoder {
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    buf: netbuf::Buf,
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    consumed: usize,
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}
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impl ProtocolDecoder {
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    pub fn new() -> ProtocolDecoder {
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        ProtocolDecoder {
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            buf: netbuf::Buf::new(),
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            consumed: 0,
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        }
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    }
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    pub fn read_from<R: Read>(&mut self, stream: &mut R) -> Result<usize> {
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        self.buf.read_from(stream)
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    }
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    pub fn extract_messages(&mut self) -> Vec<messages::HWProtocolMessage> {
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        let parse_result = parser::extract_messages(&self.buf[..]);
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        match parse_result {
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            Ok((tail, msgs)) => {
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                self.consumed = self.buf.len() - self.consumed - tail.len();
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                msgs
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            }
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            Err(Err::Incomplete(_)) => unreachable!(),
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            Err(Err::Error(_)) | Err(Err::Failure(_)) => unreachable!(),
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        }
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    }
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    pub fn sweep(&mut self) {
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        self.buf.consume(self.consumed);
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        self.consumed = 0;
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    }
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}