//! Traits for data which can be read as a sized array.

use crate::durandal::err::*;

pub trait Chunked<T>
{
   const SIZE_CHUNK: usize;
   fn read(b: &[u8]) -> ResultS<T>;
}

pub trait Chunker<T>
{
   fn chunk(b: &[u8]) -> ResultS<T>;
}

impl<T: Chunked<T>> Chunker<Vec<T>> for T
{
   fn chunk(b: &[u8]) -> ResultS<Vec<T>>
   {
      let mut v = Vec::with_capacity(b.len() / T::SIZE_CHUNK);
      let mut p = 0;

      while p < b.len() {
         v.push(T::read(&b[p..])?);
         p += T::SIZE_CHUNK;
      }

      Ok(v)
   }
}

// EOF