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Viewing file:     crc1.js (794 B)      -rw-r--r--

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _buffer = require('buffer');

var _create_buffer = require('./create_buffer');

var _create_buffer2 = _interopRequireDefault(_create_buffer);

var _define_crc = require('./define_crc');

var _define_crc2 = _interopRequireDefault(_define_crc);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var crc1 = (0, _define_crc2.default)('crc1', function (buf, previous) {
  if (!_buffer.Buffer.isBuffer(buf)) buf = (0, _create_buffer2.default)(buf);

  var crc = ~~previous;
  var accum = 0;

  for (var index = 0; index < buf.length; index++) {
    var byte = buf[index];
    accum += byte;
  }

  crc += accum % 256;
  return crc % 256;
});

exports.default = crc1;