generate-alphabetic-name/lib/hash.js

Take an arbitrary string or integer and generate a short alphabetic code. It works in the browser and node.js and is designed to be as small as possible, and extremely fast.

"use strict";
// source: https://github.com/styled-components/styled-components/blob/0aa3170c255a49cd41c3fbeb2b8051b5d132f229/src/vendor/glamor/hash.js
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * Generate a numeric 32 bit hash of a string
 */
function hash(str) {
    for (var e = str.length | 0, a = e | 0, d = 0, b; e >= 4;) {
        (b =
            (str.charCodeAt(d) & 255) |
                ((str.charCodeAt(++d) & 255) << 8) |
                ((str.charCodeAt(++d) & 255) << 16) |
                ((str.charCodeAt(++d) & 255) << 24)),
            (b =
                1540483477 * (b & 65535) + (((1540483477 * (b >>> 16)) & 65535) << 16)),
            (b ^= b >>> 24),
            (b =
                1540483477 * (b & 65535) + (((1540483477 * (b >>> 16)) & 65535) << 16)),
            (a =
                (1540483477 * (a & 65535) +
                    (((1540483477 * (a >>> 16)) & 65535) << 16)) ^
                    b),
            (e -= 4),
            ++d;
    }
    switch (e) {
        case 3:
            a ^= (str.charCodeAt(d + 2) & 255) << 16;
        case 2:
            a ^= (str.charCodeAt(d + 1) & 255) << 8;
        case 1:
            (a ^= str.charCodeAt(d) & 255),
                (a =
                    1540483477 * (a & 65535) +
                        (((1540483477 * (a >>> 16)) & 65535) << 16));
    }
    a ^= a >>> 13;
    a = 1540483477 * (a & 65535) + (((1540483477 * (a >>> 16)) & 65535) << 16);
    return (a ^ (a >>> 15)) >>> 0;
}
exports.default = hash;
//# sourceMappingURL=hash.js.map