source: trip-planner-front/node_modules/webpack/lib/util/numberHash.js@ 84d0fbb

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
        Author Tobias Koppers @sokra
*/

"use strict";

const SAFE_LIMIT = 0x80000000;
const SAFE_PART = SAFE_LIMIT - 1;
const COUNT = 4;
const arr = [0, 0, 0, 0, 0];
const primes = [3, 7, 17, 19];

module.exports = (str, range) => {
        arr.fill(0);
        for (let i = 0; i < str.length; i++) {
                const c = str.charCodeAt(i);
                for (let j = 0; j < COUNT; j++) {
                        const p = (j + COUNT - 1) % COUNT;
                        arr[j] = (arr[j] + c * primes[j] + arr[p]) & SAFE_PART;
                }
                for (let j = 0; j < COUNT; j++) {
                        const q = arr[j] % COUNT;
                        arr[j] = arr[j] ^ (arr[q] >> 1);
                }
        }
        if (range <= SAFE_PART) {
                let sum = 0;
                for (let j = 0; j < COUNT; j++) {
                        sum = (sum + arr[j]) % range;
                }
                return sum;
        } else {
                let sum1 = 0;
                let sum2 = 0;
                const rangeExt = Math.floor(range / SAFE_LIMIT);
                for (let j = 0; j < COUNT; j += 2) {
                        sum1 = (sum1 + arr[j]) & SAFE_PART;
                }
                for (let j = 1; j < COUNT; j += 2) {
                        sum2 = (sum2 + arr[j]) % rangeExt;
                }
                return (sum2 * SAFE_LIMIT + sum1) % range;
        }
};