28 lines
708 B
JavaScript
28 lines
708 B
JavaScript
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'use strict';
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var _buffer = require('buffer');
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var _create_buffer = require('./create_buffer');
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var _create_buffer2 = _interopRequireDefault(_create_buffer);
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var _define_crc = require('./define_crc');
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var _define_crc2 = _interopRequireDefault(_define_crc);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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module.exports = (0, _define_crc2.default)('crc1', function (buf, previous) {
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if (!_buffer.Buffer.isBuffer(buf)) buf = (0, _create_buffer2.default)(buf);
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var crc = ~~previous;
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var accum = 0;
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for (var index = 0; index < buf.length; index++) {
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var byte = buf[index];
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accum += byte;
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}
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crc += accum % 256;
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return crc % 256;
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});
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