mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-15 21:01:45 -05:00
51 lines
2.0 KiB
C++
51 lines
2.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2021 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
|
|
// //
|
|
// This program is free software; you can redistribute it and/or modify //
|
|
// it under the terms of the GNU General Public License as published by //
|
|
// the Free Software Foundation as version 3 of the License, or //
|
|
// (at your option) any later version. //
|
|
// //
|
|
// This program is distributed in the hope that it will be useful, //
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
|
|
// GNU General Public License V3 for more details. //
|
|
// //
|
|
// You should have received a copy of the GNU General Public License //
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
/*
|
|
Reduce N times while excluding ith input element
|
|
|
|
Copyright 2018 Ahmet Inan <inan@aicodix.de>
|
|
*/
|
|
|
|
#ifndef EXCLUSIVE_REDUCE_HH
|
|
#define EXCLUSIVE_REDUCE_HH
|
|
|
|
namespace ldpctool {
|
|
namespace CODE {
|
|
|
|
template <typename TYPE, typename OPERATOR>
|
|
void exclusive_reduce(const TYPE *in, TYPE *out, int N, OPERATOR op)
|
|
{
|
|
TYPE pre = in[0];
|
|
for (int i = 1; i < N-1; ++i) {
|
|
out[i] = pre;
|
|
pre = op(pre, in[i]);
|
|
}
|
|
out[N-1] = pre;
|
|
TYPE suf = in[N-1];
|
|
for (int i = N-2; i > 0; --i) {
|
|
out[i] = op(out[i], suf);
|
|
suf = op(suf, in[i]);
|
|
}
|
|
out[0] = suf;
|
|
}
|
|
|
|
} // namespace CODE
|
|
} // namespace ldpctool
|
|
|
|
#endif
|
|
|