34 lines
922 B
JavaScript
34 lines
922 B
JavaScript
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Alexander Akait @alexander-akait
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*/
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"use strict";
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const createHash = require("./createHash");
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/**
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* @param {string | Buffer} content content
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* @param {string} file file
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* @returns {string} generated debug id
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*/
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module.exports = (content, file) => {
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// We need a uuid which is 128 bits so we need 2x 64 bit hashes.
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// The first 64 bits is a hash of the source.
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const sourceHash = createHash("xxhash64").update(content).digest("hex");
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// The next 64 bits is a hash of the filename and sourceHash
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const hash128 = `${sourceHash}${createHash("xxhash64")
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.update(file)
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.update(sourceHash)
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.digest("hex")}`;
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return [
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hash128.slice(0, 8),
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hash128.slice(8, 12),
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`4${hash128.slice(12, 15)}`,
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((Number.parseInt(hash128.slice(15, 16), 16) & 3) | 8).toString(16) +
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hash128.slice(17, 20),
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hash128.slice(20, 32)
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].join("-");
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};
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