30 lines
698 B
JavaScript
30 lines
698 B
JavaScript
// Adapt encodings to work with Buffer or Uint8Array, they expect the latter
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function decode(buf) {
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return buf.toString('utf8');
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}
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function encode(string) {
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return new Buffer(string, 'utf8');
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}
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// https://github.com/darkskyapp/string-hash
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function hash32(string) {
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var hash = 5381;
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var i = string.length;
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while(i) {
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hash = (hash * 33) ^ string.charCodeAt(--i);
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}
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/* JavaScript does bitwise operations (like XOR, above) on 32-bit signed
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* integers. Since we want the results to be always positive, convert the
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* signed int to an unsigned by doing an unsigned bitshift. */
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return hash >>> 0;
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}
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module.exports = {
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encode: encode,
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decode: decode,
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hash32: hash32
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};
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