hts 0.1.17

Rust binding for htslib
Documentation 
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use std::ffi::CStr;
use std::convert::TryInto;

#[derive(Debug)]
pub enum TypedValue<'a> {
    I8(&'a [i8]),
    U8(&'a [u8]),
    I16(&'a [i16]),
    U16(&'a [u16]),
    I32(&'a [i32]),
    U32(&'a [u32]),
    F(&'a [f32]),
    Str(&'a CStr),
    SStr(&'a [u8]),
    Null,
}

impl <'a> TypedValue<'a> {
    fn cast_int<T: TryInto<i64> + Copy>(slice: &[T], idx: usize) -> Option<i64> {
        let value = *slice.get(idx)?;
        value.try_into().ok()
    }
    pub fn get_int(&self, idx: usize) -> Option<i64> {
        use TypedValue::*;
        match self {
            I8(v) => Self::cast_int(v, idx),
            U8(v) =>  Self::cast_int(v, idx),
            I16(v) => Self::cast_int(v, idx),
            U16(v) => Self::cast_int(v, idx),
            I32(v) => Self::cast_int(v, idx),
            U32(v) => Self::cast_int(v, idx),
            _ => None
        }
    }
}