22 lines
675 B
TypeScript
22 lines
675 B
TypeScript
import { Element } from './'
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/***
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* This is insecure hash function, just for example only
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* @param data
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* @param seed
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* @param hashLength
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*/
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export function simpleHash<T>(data: T[], seed?: number, hashLength = 40): string {
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const str = data.join('')
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let i, l,
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hval = seed ?? 0x811c9dcc5
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for (i = 0, l = str.length; i < l; i++) {
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hval ^= str.charCodeAt(i)
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hval += (hval << 1) + (hval << 4) + (hval << 6) + (hval << 8) + (hval << 24)
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}
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const hash = (hval >>> 0).toString(16)
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return BigInt('0x' + hash.padEnd(hashLength - (hash.length - 1), '0')).toString(10)
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}
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export default (left: Element, right: Element): string => simpleHash([left, right])
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