yylib-quick-mobile/source/utils/base64.js

yylib-quick-mobile

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});
var Base64 = {
    table: ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'],
    UTF16ToUTF8: function UTF16ToUTF8(str) {
        var res = [],
            len = str.length;
        for (var i = 0; i < len; i++) {
            var code = str.charCodeAt(i);
            if (code > 0x0000 && code <= 0x007F) {
                res.push(str.charAt(i));
            } else if (code >= 0x0080 && code <= 0x07FF) {
                var byte1 = 0xC0 | code >> 6 & 0x1F;

                var byte2 = 0x80 | code & 0x3F;
                res.push(String.fromCharCode(byte1), String.fromCharCode(byte2));
            } else if (code >= 0x0800 && code <= 0xFFFF) {
                var byte1 = 0xE0 | code >> 12 & 0x0F;

                var byte2 = 0x80 | code >> 6 & 0x3F;

                var byte3 = 0x80 | code & 0x3F;
                res.push(String.fromCharCode(byte1), String.fromCharCode(byte2), String.fromCharCode(byte3));
            } else if (code >= 0x00010000 && code <= 0x001FFFFF) {} else if (code >= 0x00200000 && code <= 0x03FFFFFF) {} else {}
        }

        return res.join('');
    },
    UTF8ToUTF16: function UTF8ToUTF16(str) {
        var res = [],
            len = str.length;
        var i = 0;
        for (var i = 0; i < len; i++) {
            var code = str.charCodeAt(i);

            if ((code >> 7 & 0xFF) == 0x0) {
                res.push(str.charAt(i));
            } else if ((code >> 5 & 0xFF) == 0x6) {
                var code2 = str.charCodeAt(++i);
                var byte1 = (code & 0x1F) << 6;
                var byte2 = code2 & 0x3F;
                var utf16 = byte1 | byte2;
                res.push(Sting.fromCharCode(utf16));
            } else if ((code >> 4 & 0xFF) == 0xE) {
                var code2 = str.charCodeAt(++i);
                var code3 = str.charCodeAt(++i);
                var byte1 = code << 4 | code2 >> 2 & 0x0F;
                var byte2 = (code2 & 0x03) << 6 | code3 & 0x3F;
                utf16 = (byte1 & 0x00FF) << 8 | byte2;
                res.push(String.fromCharCode(utf16));
            } else if ((code >> 3 & 0xFF) == 0x1E) {} else if ((code >> 2 & 0xFF) == 0x3E) {} else {}
        }

        return res.join('');
    },
    encode: function encode(str) {
        if (!str) {
            return '';
        }
        var utf8 = this.UTF16ToUTF8(str);
        var i = 0;
        var len = utf8.length;
        var res = [];
        while (i < len) {
            var c1 = utf8.charCodeAt(i++) & 0xFF;
            res.push(this.table[c1 >> 2]);

            if (i == len) {
                res.push(this.table[(c1 & 0x3) << 4]);
                res.push('==');
                break;
            }
            var c2 = utf8.charCodeAt(i++);

            if (i == len) {
                res.push(this.table[(c1 & 0x3) << 4 | c2 >> 4 & 0x0F]);
                res.push(this.table[(c2 & 0x0F) << 2]);
                res.push('=');
                break;
            }
            var c3 = utf8.charCodeAt(i++);
            res.push(this.table[(c1 & 0x3) << 4 | c2 >> 4 & 0x0F]);
            res.push(this.table[(c2 & 0x0F) << 2 | (c3 & 0xC0) >> 6]);
            res.push(this.table[c3 & 0x3F]);
        }

        return res.join('');
    },
    decode: function decode(str) {
        if (!str) {
            return '';
        }

        var len = str.length;
        var i = 0;
        var res = [];

        while (i < len) {
            code1 = this.table.indexOf(str.charAt(i++));
            code2 = this.table.indexOf(str.charAt(i++));
            code3 = this.table.indexOf(str.charAt(i++));
            code4 = this.table.indexOf(str.charAt(i++));

            c1 = code1 << 2 | code2 >> 4;
            c2 = (code2 & 0xF) << 4 | code3 >> 2;
            c3 = (code3 & 0x3) << 6 | code4;

            res.push(String.fromCharCode(c1));

            if (code3 != 64) {
                res.push(String.fromCharCode(c2));
            }
            if (code4 != 64) {
                res.push(String.fromCharCode(c3));
            }
        }

        return this.UTF8ToUTF16(res.join(''));
    }
};
exports.default = Base64;