midix 3.2.0

MIDI structures designed for humans
Documentation 
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use std::borrow::Cow;

use super::Bytes;

#[doc = r#"
Any type that represents some midi source type.
"#]
pub trait MidiSource<'slc> {
    /// Get the max length of the source.
    fn max_len(&self) -> usize;

    /// Get the a partial slice of the source.
    fn get_slice(&self, start: usize, end: usize) -> Option<Bytes<'slc>>;

    /// Get a byte. Bytes are cheap to copy
    fn get_byte(&self, pos: usize) -> Option<u8>;
}

impl<'slc> MidiSource<'slc> for &'slc [u8] {
    fn max_len(&self) -> usize {
        self.len()
    }
    fn get_slice(&self, start: usize, end: usize) -> Option<Bytes<'slc>> {
        self.get(start..end).map(Into::into)
    }
    fn get_byte(&self, pos: usize) -> Option<u8> {
        self.get(pos).copied()
    }
}

impl<'a> MidiSource<'a> for Bytes<'a> {
    fn max_len(&self) -> usize {
        self.len()
    }

    fn get_slice(&self, start: usize, end: usize) -> Option<Bytes<'a>> {
        match self.as_cow() {
            Cow::Borrowed(v) => v.get(start..end).map(Into::into),
            Cow::Owned(v) => {
                let slice = v.get(start..end)?;
                Some(slice.to_vec().into())
            }
        }
    }
    fn get_byte(&self, pos: usize) -> Option<u8> {
        self.get(pos).copied()
    }
}