69 lines
1.5 KiB
JavaScript
69 lines
1.5 KiB
JavaScript
// @flow
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/* eslint-disable */
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const CHARS =
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'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
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export default {
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/**
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* window.btoa
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*/
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btoa(input: string = ''): string {
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let map;
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let i = 0;
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let block = 0;
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let output = '';
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// eslint-disable-next-line
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for (
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block = 0, i = 0, map = CHARS;
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input.charAt(i | 0) || ((map = '='), i % 1);
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output += map.charAt(63 & (block >> (8 - (i % 1) * 8)))
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) {
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const charCode = input.charCodeAt((i += 3 / 4));
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if (charCode > 0xff) {
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throw new Error(
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"'RNFirebase.utils.btoa' failed: The string to be encoded contains characters outside of the Latin1 range."
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);
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}
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block = (block << 8) | charCode;
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}
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return output;
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},
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/**
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* window.atob
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*/
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atob(input: string = ''): string {
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let i = 0;
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let bc = 0;
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let bs = 0;
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let buffer;
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let output = '';
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const str = input.replace(/=+$/, '');
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if (str.length % 4 === 1) {
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throw new Error(
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"'RNFirebase.utils.atob' failed: The string to be decoded is not correctly encoded."
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);
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}
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// eslint-disable-next-line
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for (
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bc = 0, bs = 0, i = 0;
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(buffer = str.charAt(i++));
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~buffer && ((bs = bc % 4 ? bs * 64 + buffer : buffer), bc++ % 4)
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? (output += String.fromCharCode(255 & (bs >> ((-2 * bc) & 6))))
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: 0
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) {
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buffer = CHARS.indexOf(buffer);
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}
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return output;
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},
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};
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