Lyndon Jetten
fda2c306b5
FaC: Das alte Flag von Terminen, die in die Zeiterfassung übernommen worden sind, wird ebenfalls berücksichtigt.
21 lines
444 B
JavaScript
21 lines
444 B
JavaScript
import { Buffer } from 'buffer';
|
|
import createBuffer from './create_buffer';
|
|
import defineCrc from './define_crc';
|
|
|
|
const crc1 = defineCrc('crc1', function(buf, previous) {
|
|
if (!Buffer.isBuffer(buf)) buf = createBuffer(buf);
|
|
|
|
let crc = ~~previous;
|
|
let accum = 0;
|
|
|
|
for (let index = 0; index < buf.length; index++) {
|
|
const byte = buf[index];
|
|
accum += byte;
|
|
}
|
|
|
|
crc += accum % 256;
|
|
return crc % 256;
|
|
});
|
|
|
|
export default crc1;
|