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extern crate bchlib_sys as ffi;
use std::ptr::null;
struct BCH(ffi::bch_control);
impl BCH {
fn init(m: i32, t: i32, poly: u32) -> BCH {
let bch = unsafe { *ffi::init_bch(m, t, poly) };
BCH(bch)
}
fn decode(&mut self, msg: &[u8], ecc: &[u8], errloc: &mut[u32]) -> i32 {
let err = unsafe {
ffi::decodebits_bch(&mut self.0, msg.as_ptr(), ecc.as_ptr(), errloc.as_mut_ptr())
};
err
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_decode() {
let mut bch = BCH::init(5, 2, 37);
let msg: [u8; 21] = [1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
let ecc: [u8; 10] = [1, 1, 1, 0, 1, 1, 0, 1, 0, 0];
let mut errloc: [u32; 2] = [0, 0];
bch.decode(&msg, &ecc, &mut errloc);
assert_eq!(errloc[0], 0);
assert_eq!(errloc[1], 0);
}
#[test]
fn test_decode_err() {
let mut bch = BCH::init(5, 2, 37);
let msg: [u8; 21] = [1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
let ecc: [u8; 10] = [1, 1, 1, 0, 1, 1, 0, 1, 0, 1];
let mut errloc: [u32; 2] = [0, 0];
bch.decode(&msg, &ecc, &mut errloc);
assert_eq!(errloc[0], 30);
assert_eq!(errloc[1], 0);
}
#[test]
fn test_sync_codeword() {
let mut bch = BCH::init(5, 2, 1897);
let msg: [u8; 21] = [0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0];
let ecc: [u8; 10] = [1, 0, 1, 1, 1, 0, 1, 1, 0, 0];
let mut errloc: [u32; 2] = [0, 0];
bch.decode(&msg, &ecc, &mut errloc);
assert_eq!(errloc[0], 0);
assert_eq!(errloc[1], 0);
}
}
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