305 lines
4.7 KiB
JavaScript
305 lines
4.7 KiB
JavaScript
function getDefaultExportFromCjs (x) {
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return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
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}
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const CRC_TABLE = new Int32Array([
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0,
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]);
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function ensureBuffer(input) {
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if (Buffer.isBuffer(input)) {
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return input;
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}
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if (typeof input === "number") {
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return Buffer.alloc(input);
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} else if (typeof input === "string") {
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return Buffer.from(input);
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} else {
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throw new Error("input must be buffer, number, or string, received " + typeof input);
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}
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}
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function bufferizeInt(num) {
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const tmp = ensureBuffer(4);
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tmp.writeInt32BE(num, 0);
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return tmp;
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}
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function _crc32(buf, previous) {
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buf = ensureBuffer(buf);
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if (Buffer.isBuffer(previous)) {
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previous = previous.readUInt32BE(0);
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}
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let crc = ~~previous ^ -1;
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for (var n = 0; n < buf.length; n++) {
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crc = CRC_TABLE[(crc ^ buf[n]) & 255] ^ crc >>> 8;
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}
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return crc ^ -1;
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}
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function crc32() {
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return bufferizeInt(_crc32.apply(null, arguments));
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}
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crc32.signed = function() {
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return _crc32.apply(null, arguments);
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};
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crc32.unsigned = function() {
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return _crc32.apply(null, arguments) >>> 0;
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};
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var bufferCrc32 = crc32;
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const index = /*@__PURE__*/getDefaultExportFromCjs(bufferCrc32);
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export { index as default };
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