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add trait
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21
src/lib.rs
21
src/lib.rs
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@ -109,6 +109,20 @@ impl PackTwInt for i32 {
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}
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}
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/// Trait implemented by buffers holding a teeworlds variable int.
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///
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/// This trait is more of a convenience to allow writing `let data = buff.unpack()?;`
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pub trait UnpPackTwInt: Read {
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/// Unpack this reader holding a teeworlds variable int to a i32.
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fn unpack(&mut self) -> Result<i32>;
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}
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impl<T: Read> UnpPackTwInt for T {
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fn unpack(&mut self) -> Result<i32> {
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unpack(self)
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}
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}
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#[cfg(test)]
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mod tests {
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use std::io::Cursor;
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@ -240,4 +254,11 @@ mod tests {
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assert_eq!(buff[0], 0b1000_0000);
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assert_eq!(buff[1], 0b0000_0001);
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}
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#[test]
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pub fn unpack_64_trait() {
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let mut buff = Cursor::new([0b1000_0000, 0b0000_0001]);
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let result = buff.unpack().unwrap();
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assert_eq!(result, 64);
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}
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}
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