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| ; | |
| Object.defineProperty(exports, '__esModule', { value: true }); | |
| /* eslint-disable */ | |
| // Inspired by https://github.com/garycourt/murmurhash-js | |
| // Ported from https://github.com/aappleby/smhasher/blob/61a0530f28277f2e850bfc39600ce61d02b518de/src/MurmurHash2.cpp#L37-L86 | |
| function murmur2(str) { | |
| // 'm' and 'r' are mixing constants generated offline. | |
| // They're not really 'magic', they just happen to work well. | |
| // const m = 0x5bd1e995; | |
| // const r = 24; | |
| // Initialize the hash | |
| var h = 0; // Mix 4 bytes at a time into the hash | |
| var k, | |
| i = 0, | |
| len = str.length; | |
| for (; len >= 4; ++i, len -= 4) { | |
| k = str.charCodeAt(i) & 0xff | (str.charCodeAt(++i) & 0xff) << 8 | (str.charCodeAt(++i) & 0xff) << 16 | (str.charCodeAt(++i) & 0xff) << 24; | |
| k = | |
| /* Math.imul(k, m): */ | |
| (k & 0xffff) * 0x5bd1e995 + ((k >>> 16) * 0xe995 << 16); | |
| k ^= | |
| /* k >>> r: */ | |
| k >>> 24; | |
| h = | |
| /* Math.imul(k, m): */ | |
| (k & 0xffff) * 0x5bd1e995 + ((k >>> 16) * 0xe995 << 16) ^ | |
| /* Math.imul(h, m): */ | |
| (h & 0xffff) * 0x5bd1e995 + ((h >>> 16) * 0xe995 << 16); | |
| } // Handle the last few bytes of the input array | |
| switch (len) { | |
| case 3: | |
| h ^= (str.charCodeAt(i + 2) & 0xff) << 16; | |
| case 2: | |
| h ^= (str.charCodeAt(i + 1) & 0xff) << 8; | |
| case 1: | |
| h ^= str.charCodeAt(i) & 0xff; | |
| h = | |
| /* Math.imul(h, m): */ | |
| (h & 0xffff) * 0x5bd1e995 + ((h >>> 16) * 0xe995 << 16); | |
| } // Do a few final mixes of the hash to ensure the last few | |
| // bytes are well-incorporated. | |
| h ^= h >>> 13; | |
| h = | |
| /* Math.imul(h, m): */ | |
| (h & 0xffff) * 0x5bd1e995 + ((h >>> 16) * 0xe995 << 16); | |
| return ((h ^ h >>> 15) >>> 0).toString(36); | |
| } | |
| exports["default"] = murmur2; | |