webvirtcloud/static/js/novnc/core/base64.js

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});

var _logging = require('./util/logging.js');

var Log = _interopRequireWildcard(_logging);

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

exports.default = {
    /* Convert data (an array of integers) to a Base64 string. */
    toBase64Table: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='.split(''),
    base64Pad: '=',

    encode: function (data) {
        "use strict";

        var result = '';
        var toBase64Table = this.toBase64Table;
        var length = data.length;
        var lengthpad = length % 3;
        // Convert every three bytes to 4 ascii characters.

        for (var i = 0; i < length - 2; i += 3) {
            result += toBase64Table[data[i] >> 2];
            result += toBase64Table[((data[i] & 0x03) << 4) + (data[i + 1] >> 4)];
            result += toBase64Table[((data[i + 1] & 0x0f) << 2) + (data[i + 2] >> 6)];
            result += toBase64Table[data[i + 2] & 0x3f];
        }

        // Convert the remaining 1 or 2 bytes, pad out to 4 characters.
        var j = 0;
        if (lengthpad === 2) {
            j = length - lengthpad;
            result += toBase64Table[data[j] >> 2];
            result += toBase64Table[((data[j] & 0x03) << 4) + (data[j + 1] >> 4)];
            result += toBase64Table[(data[j + 1] & 0x0f) << 2];
            result += toBase64Table[64];
        } else if (lengthpad === 1) {
            j = length - lengthpad;
            result += toBase64Table[data[j] >> 2];
            result += toBase64Table[(data[j] & 0x03) << 4];
            result += toBase64Table[64];
            result += toBase64Table[64];
        }

        return result;
    },

    /* Convert Base64 data to a string */
    toBinaryTable: [-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, 0, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1],

    decode: function (data, offset) {
        "use strict";

        offset = typeof offset !== 'undefined' ? offset : 0;
        var toBinaryTable = this.toBinaryTable;
        var base64Pad = this.base64Pad;
        var result, result_length;
        var leftbits = 0; // number of bits decoded, but yet to be appended
        var leftdata = 0; // bits decoded, but yet to be appended
        var data_length = data.indexOf('=') - offset;

        if (data_length < 0) {
            data_length = data.length - offset;
        }

        /* Every four characters is 3 resulting numbers */
        result_length = (data_length >> 2) * 3 + Math.floor(data_length % 4 / 1.5);
        result = new Array(result_length);

        // Convert one by one.
        for (var idx = 0, i = offset; i < data.length; i++) {
            var c = toBinaryTable[data.charCodeAt(i) & 0x7f];
            var padding = data.charAt(i) === base64Pad;
            // Skip illegal characters and whitespace
            if (c === -1) {
                Log.Error("Illegal character code " + data.charCodeAt(i) + " at position " + i);
                continue;
            }

            // Collect data into leftdata, update bitcount
            leftdata = leftdata << 6 | c;
            leftbits += 6;

            // If we have 8 or more bits, append 8 bits to the result
            if (leftbits >= 8) {
                leftbits -= 8;
                // Append if not padding.
                if (!padding) {
                    result[idx++] = leftdata >> leftbits & 0xff;
                }
                leftdata &= (1 << leftbits) - 1;
            }
        }

        // If there are any bits left, the base64 string was corrupted
        if (leftbits) {
            err = new Error('Corrupted base64 string');
            err.name = 'Base64-Error';
            throw err;
        }

        return result;
    }
}; /* End of Base64 namespace */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

// From: http://hg.mozilla.org/mozilla-central/raw-file/ec10630b1a54/js/src/devtools/jint/sunspider/string-base64.js