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

don't rely on err[] being signed

Browse source
This commit is contained in:
Ahmet Inan 2020-07-08 13:46:07 +02:00
commit 0797171e03
1 changed files with 4 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

8
short_bch_code_decoder.hh
View file

@ -43,8 +43,7 @@ public:
for (int i = 0; i < W; ++i) for (int i = 0; i < W; ++i)
par[i] = modgen(i << P); par[i] = modgen(i << P);
for (int i = 0; i < R; ++i) for (int i = 0; i < R; ++i)
err[i] = -1; err[i] = 0;
err[0] = 0;
for (int a = 1<<(N-1); T >= 1 && a; a >>= 1) { for (int a = 1<<(N-1); T >= 1 && a; a >>= 1) {
err[modgen(a)] = a; err[modgen(a)] = a;
for (int b = a >> 1; T >= 2 && b; b >>= 1) { for (int b = a >> 1; T >= 2 && b; b >>= 1) {
@ -57,8 +56,9 @@ public:
} }
int operator()(int inp) int operator()(int inp)
{ {
int tmp = err[(par[inp>>P] ^ inp) & (R-1)]; int syn = (par[inp>>P] ^ inp) & (R-1);
return tmp >= 0 ? inp ^ tmp : -1; int pat = err[syn];
return pat || !syn ? inp ^ pat : -1;
} }
int operator()(const int8_t *code) int operator()(const int8_t *code)
{ {