63 lines
2.2 KiB
JavaScript
63 lines
2.2 KiB
JavaScript
|
'use strict';
|
||
|
|
var $ = require('../internals/export');
|
||
|
|
var global = require('../internals/global');
|
||
|
|
var getBuiltIn = require('../internals/get-built-in');
|
||
|
|
var uncurryThis = require('../internals/function-uncurry-this');
|
||
|
|
var call = require('../internals/function-call');
|
||
|
|
var fails = require('../internals/fails');
|
||
|
|
var toString = require('../internals/to-string');
|
||
|
|
var hasOwn = require('../internals/has-own-property');
|
||
|
|
var validateArgumentsLength = require('../internals/validate-arguments-length');
|
||
|
|
var ctoi = require('../internals/base64-map').ctoi;
|
||
|
|
|
||
|
|
var disallowed = /[^\d+/a-z]/i;
|
||
|
|
var whitespaces = /[\t\n\f\r ]+/g;
|
||
|
|
var finalEq = /[=]{1,2}$/;
|
||
|
|
|
||
|
|
var $atob = getBuiltIn('atob');
|
||
|
|
var fromCharCode = String.fromCharCode;
|
||
|
|
var charAt = uncurryThis(''.charAt);
|
||
|
|
var replace = uncurryThis(''.replace);
|
||
|
|
var exec = uncurryThis(disallowed.exec);
|
||
|
|
|
||
|
|
var NO_SPACES_IGNORE = fails(function () {
|
||
|
|
return $atob(' ') !== '';
|
||
|
|
});
|
||
|
|
|
||
|
|
var NO_ENCODING_CHECK = !fails(function () {
|
||
|
|
$atob('a');
|
||
|
|
});
|
||
|
|
|
||
|
|
var NO_ARG_RECEIVING_CHECK = !NO_SPACES_IGNORE && !NO_ENCODING_CHECK && !fails(function () {
|
||
|
|
$atob();
|
||
|
|
});
|
||
|
|
|
||
|
|
var WRONG_ARITY = !NO_SPACES_IGNORE && !NO_ENCODING_CHECK && $atob.length !== 1;
|
||
|
|
|
||
|
|
// `atob` method
|
||
|
|
// https://html.spec.whatwg.org/multipage/webappapis.html#dom-atob
|
||
|
|
$({ global: true, bind: true, enumerable: true, forced: NO_SPACES_IGNORE || NO_ENCODING_CHECK || NO_ARG_RECEIVING_CHECK || WRONG_ARITY }, {
|
||
|
|
atob: function atob(data) {
|
||
|
|
validateArgumentsLength(arguments.length, 1);
|
||
|
|
// `webpack` dev server bug on IE global methods - use call(fn, global, ...)
|
||
|
|
if (NO_ARG_RECEIVING_CHECK || WRONG_ARITY) return call($atob, global, data);
|
||
|
|
var string = replace(toString(data), whitespaces, '');
|
||
|
|
var output = '';
|
||
|
|
var position = 0;
|
||
|
|
var bc = 0;
|
||
|
|
var chr, bs;
|
||
|
|
if (string.length % 4 === 0) {
|
||
|
|
string = replace(string, finalEq, '');
|
||
|
|
}
|
||
|
|
if (string.length % 4 === 1 || exec(disallowed, string)) {
|
||
|
|
throw new (getBuiltIn('DOMException'))('The string is not correctly encoded', 'InvalidCharacterError');
|
||
|
|
}
|
||
|
|
while (chr = charAt(string, position++)) {
|
||
|
|
if (hasOwn(ctoi, chr)) {
|
||
|
|
bs = bc % 4 ? bs * 64 + ctoi[chr] : ctoi[chr];
|
||
|
|
if (bc++ % 4) output += fromCharCode(255 & bs >> (-2 * bc & 6));
|
||
|
|
}
|
||
|
|
} return output;
|
||
|
|
}
|
||
|
|
});
|