| "use strict"; |
| |
| Object.defineProperty(exports, "__esModule", { |
| value: true |
| }); |
| exports.encode = encode; |
| |
| function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } } |
| |
| function _toArray(arr) { return Array.isArray(arr) ? arr : Array.from(arr); } |
| |
| function con(n) { |
| return 0x80 | n & 0x3f; |
| } |
| |
| function encode(str) { |
| var arr = str.split("").map(function (x) { |
| return x.charCodeAt(0); |
| }); |
| return _encode(arr); |
| } |
| |
| function _encode(arr) { |
| if (arr.length === 0) { |
| return []; |
| } |
| |
| var _arr = _toArray(arr), |
| n = _arr[0], |
| ns = _arr.slice(1); |
| |
| if (n < 0) { |
| throw new Error("utf8"); |
| } |
| |
| if (n < 0x80) { |
| return [n].concat(_toConsumableArray(_encode(ns))); |
| } |
| |
| if (n < 0x800) { |
| return [0xc0 | n >>> 6, con(n)].concat(_toConsumableArray(_encode(ns))); |
| } |
| |
| if (n < 0x10000) { |
| return [0xe0 | n >>> 12, con(n >>> 6), con(n)].concat(_toConsumableArray(_encode(ns))); |
| } |
| |
| if (n < 0x110000) { |
| return [0xf0 | n >>> 18, con(n >>> 12), con(n >>> 6), con(n)].concat(_toConsumableArray(_encode(ns))); |
| } |
| |
| throw new Error("utf8"); |
| } |