esl 0.3.1

A library for reading, writing and processing ESM/ESP/ESS files.
Documentation 
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use encoding::{Encoding};
use encoding::all::{WINDOWS_1251, WINDOWS_1252};

macro_attr! {
    #[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
    #[derive(IterVariants!(CodePageVariants))]
    pub enum CodePage {
        English,
        Russian,
    }
}

impl CodePage {
    pub fn encoding(self) -> &'static dyn Encoding {
        match self {
            CodePage::English => WINDOWS_1252,
            CodePage::Russian => WINDOWS_1251,
        }
    }
}

#[cfg(test)]
mod tests {
    use crate::code::*;
    use encoding::{DecoderTrap, EncoderTrap};

    #[test]
    fn all_code_pages_are_single_byte_encodings() {
        for code_page in CodePage::iter_variants() {
            let encoding = code_page.encoding();
            for byte in 0u8 ..= 255 {
                let c = encoding.decode(&[byte], DecoderTrap::Strict).unwrap();
                let b = encoding.encode(&c, EncoderTrap::Strict).unwrap();
                assert_eq!(b.len(), 1);
                assert_eq!(b[0], byte);
            }
            for byte in 0u8 .. 128 {
                let c = encoding.decode(&[byte], DecoderTrap::Strict).unwrap();
                assert_eq!(c.len(), 1);
                assert_eq!(byte as u32, c.as_bytes()[0] as u32);
            }
        }
    }
}