Mirror/aicodix___code
1
0
Fork 0
mirror of https://github.com/aicodix/code.git synced 2026-04-27 14:30:36 +00:00
Code Issues Projects Releases Packages Wiki Activity

moved constructor generator argument to template parameter

Browse source
This commit is contained in:
Ahmet Inan 2020-06-14 20:43:45 +02:00
commit b54be1c997
6 changed files with 22 additions and 22 deletions
Download patch file Download diff file Expand all files Collapse all files

18
short_bch_code_decoder.hh
View file

@ -8,7 +8,7 @@ Copyright 2020 Ahmet Inan <inan@aicodix.de>
namespace CODE {
template <int N, int K, int T>
template <int N, int K, int G, int T>
class ShortBCHCodeDecoder
{
static const int P = N - K;
@ -19,11 +19,11 @@ class ShortBCHCodeDecoder
static_assert(N < 8 * sizeof(err[0]), "codeword type not wide enough");
static_assert(P < 8 * sizeof(par[0]), "parity type not wide enough");
static_assert(T > 0 && T <= 4, "unsupported radius T");
static int modgen(int inp, int gen)
static int modgen(int inp)
{
for (int i = K-1; i >= 0; --i) {
int tmp = inp >> (i+P);
inp ^= (tmp & 1) * (gen << i);
inp ^= (tmp & 1) * (G << i);
}
return inp;
}
@ -36,19 +36,19 @@ class ShortBCHCodeDecoder
return sum;
}
public:
ShortBCHCodeDecoder(int generator)
ShortBCHCodeDecoder()
{
for (int i = 0; i < W; ++i)
par[i] = modgen(i << P, generator);
par[i] = modgen(i << P);
err[0] = 0;
for (int a = 1<<(N-1); T >= 1 && a; a >>= 1) {
err[modgen(a, generator)] = a;
err[modgen(a)] = a;
for (int b = a >> 1; T >= 2 && b; b >>= 1) {
err[modgen(a|b, generator)] = a|b;
err[modgen(a|b)] = a|b;
for (int c = b >> 1; T >= 3 && c; c >>= 1) {
err[modgen(a|b|c, generator)] = a|b|c;
err[modgen(a|b|c)] = a|b|c;
for (int d = c >> 1; T >= 4 && d; d >>= 1) {
err[modgen(a|b|c|d, generator)] = a|b|c|d;
err[modgen(a|b|c|d)] = a|b|c|d;
}
}
}