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authorMatthias P. Braendli <matthias.braendli@mpb.li>2016-09-02 17:43:32 +0200
committerMatthias P. Braendli <matthias.braendli@mpb.li>2016-09-07 21:20:24 +0200
commit4809f3c042a99a639542b1e6cd22657871113260 (patch)
treedc0ec0f256eaceb79d63daa09591d4a6ef08cb73 /firecode.c
parent5542c8ecff635f9abc05b6b2ff255db02c2c9c46 (diff)
downloadetisnoop-4809f3c042a99a639542b1e6cd22657871113260.tar.gz
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Move all sources to src/
Diffstat (limited to 'firecode.c')
-rw-r--r--firecode.c50
1 files changed, 0 insertions, 50 deletions
diff --git a/firecode.c b/firecode.c
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index 47ee976..0000000
--- a/firecode.c
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-/*
- Copyright (C) 2014 Matthias P. Braendli (http://www.opendigitalradio.org)
-
- 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, either 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 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/>.
-
- firecode.c
- Implement a FireCode CRC calculator
-
- Authors:
- Matthias P. Braendli <matthias@mpb.li>
-*/
-
-#include "firecode.h"
-
-uint16_t firecode_crc(uint8_t* buf, size_t size)
-{
- int crc;
- int gen_poly;
-
- crc = 0x0000;
- gen_poly = 0x782F; // 0111 1000 0010 1111 (16, 14, 13, 12, 11, 5, 3, 2, 1, 0)
-
- for (size_t len = 0; len < size; len++) {
- for (int i = 0x80; i != 0; i >>= 1) {
- if ((crc & 0x8000) != 0) {
- crc = (crc << 1) ^ gen_poly;
- }
- else {
- crc = crc << 1;
- }
- if ((buf[len] & i) != 0) {
- crc ^= gen_poly;
- }
- }
- }
-
- return crc & 0xFFFF;
-}
-