npsd 0.2.0

Network payload serializer / deserializer framework
Documentation 
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use core::str;
use std::str::FromStr;

use super::{Error, Middleware, Payload, IntoPayload, FromPayload};

impl<C> IntoPayload<C>  for char {
    #[inline]
    fn into_payload<'m, M: Middleware<'m>>(&self, ctx: &mut C, next: &mut M) -> Result<(), Error> {
        next.into_payload(&(*self as u32).to_be_bytes(), ctx)
    }
}

impl<'a, C> FromPayload<'a, C> for char {
    fn from_payload<M: Middleware<'a>>(ctx: &mut C, next: &mut M) -> Result<Self, Error>
    {
        let ch: u32 = next.from_payload(ctx)?;

        if let Some(ch) = char::from_u32(ch) {
            Ok(ch)
        } else {
            Err(Error::UnknownVariant("Exptected char from u32".to_string()))
        }
    }
}

impl<'a, C> Payload<'a, C> for char {}

impl<'a, C> IntoPayload<C>  for &'a str {
    #[inline]
    fn into_payload<'b, M: Middleware<'b>>(&self, ctx: &mut C, next: &mut M) -> Result<(), Error> {
        next.into_payload(&self.as_bytes(), ctx)
    }
}

impl<'a, C> FromPayload<'a, C> for &'a str {
    fn from_payload<M: Middleware<'a>>(ctx: &mut C, next: &mut M) -> Result<Self, Error> {
        let nbytes: usize = next.from_payload(ctx)?;

        str::from_utf8(next.read(nbytes)?).map_err(|e| {
            Error::InvalidUtf8(e.to_string())
        })
    }
}

impl<'a, C> Payload<'a, C> for &'a str {}

impl<C> IntoPayload<C>  for &mut str {
    #[inline]
    fn into_payload<'m, M: Middleware<'m>>(&self, ctx: &mut C, next: &mut M) -> Result<(), Error> {
        next.into_payload(&self.as_bytes(), ctx)
    }
}

impl<'a, C> FromPayload<'a, C> for &'a mut str {
    fn from_payload<M: Middleware<'a>>(ctx: &mut C, next: &mut M) -> Result<Self, Error> {
        let nbytes: usize = next.from_payload(ctx)?;
        
        str::from_utf8_mut(next.read_mut(nbytes)?).map_err(|e| {
            Error::InvalidUtf8(e.to_string())
        })
    }
}

impl<'a, C> Payload<'a, C> for &'a mut str {}

impl<C> IntoPayload<C>  for String {
    fn into_payload<'m, M: Middleware<'m>>(&self, ctx: &mut C, next: &mut M) -> Result<(), Error> {
        next.into_payload(&self.as_bytes(), ctx)
    }
}

impl<'a, C> FromPayload<'a, C> for String {
    fn from_payload<M: Middleware<'a>>(ctx: &mut C, next: &mut M) -> Result<Self, Error> {
        String::from_str(next.from_payload(ctx)?).map_err(|e| {
            Error::InvalidUtf8(e.to_string())
        })
    }
}

impl<'a, C> Payload<'a, C> for String {}