school/qiniu-js/esm/base64.js

/* eslint-disable */
export function utf8Encode(argString) {
    // http://kevin.vanzonneveld.net
    // +   original by: Webtoolkit.info (http://www.webtoolkit.info/)
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: sowberry
    // +    tweaked by: Jack
    // +   bugfixed by: Onno Marsman
    // +   improved by: Yves Sucaet
    // +   bugfixed by: Onno Marsman
    // +   bugfixed by: Ulrich
    // +   bugfixed by: Rafal Kukawski
    // +   improved by: kirilloid
    // +   bugfixed by: kirilloid
    // *     example 1: this.utf8Encode('Kevin van Zonneveld')
    // *     returns 1: 'Kevin van Zonneveld'
    if (argString === null || typeof argString === 'undefined') {
        return '';
    }
    var string = argString + ''; // .replace(/\r\n/g, '\n').replace(/\r/g, '\n')
    var utftext = '', start, end, stringl = 0;
    start = end = 0;
    stringl = string.length;
    for (var n = 0; n < stringl; n++) {
        var c1 = string.charCodeAt(n);
        var enc = null;
        if (c1 < 128) {
            end++;
        }
        else if (c1 > 127 && c1 < 2048) {
            enc = String.fromCharCode((c1 >> 6) | 192, (c1 & 63) | 128);
        }
        else if ((c1 & 0xf800 ^ 0xd800) > 0) {
            enc = String.fromCharCode((c1 >> 12) | 224, ((c1 >> 6) & 63) | 128, (c1 & 63) | 128);
        }
        else {
            // surrogate pairs
            if ((c1 & 0xfc00 ^ 0xd800) > 0) {
                throw new RangeError('Unmatched trail surrogate at ' + n);
            }
            var c2 = string.charCodeAt(++n);
            if ((c2 & 0xfc00 ^ 0xdc00) > 0) {
                throw new RangeError('Unmatched lead surrogate at ' + (n - 1));
            }
            c1 = ((c1 & 0x3ff) << 10) + (c2 & 0x3ff) + 0x10000;
            enc = String.fromCharCode((c1 >> 18) | 240, ((c1 >> 12) & 63) | 128, ((c1 >> 6) & 63) | 128, (c1 & 63) | 128);
        }
        if (enc !== null) {
            if (end > start) {
                utftext += string.slice(start, end);
            }
            utftext += enc;
            start = end = n + 1;
        }
    }
    if (end > start) {
        utftext += string.slice(start, stringl);
    }
    return utftext;
}
export function base64Encode(data) {
    // http://kevin.vanzonneveld.net
    // +   original by: Tyler Akins (http://rumkin.com)
    // +   improved by: Bayron Guevara
    // +   improved by: Thunder.m
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   bugfixed by: Pellentesque Malesuada
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // -    depends on: this.utf8Encode
    // *     example 1: this.base64Encode('Kevin van Zonneveld')
    // *     returns 1: 'S2V2aW4gdmFuIFpvbm5ldmVsZA=='
    // mozilla has this native
    // - but breaks in 2.0.0.12!
    // if (typeof this.window['atob'] == 'function') {
    //    return atob(data)
    // }
    var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
    var o1, o2, o3, h1, h2, h3, h4, bits, i = 0, ac = 0, enc = '', tmp_arr = [];
    if (!data) {
        return data;
    }
    data = utf8Encode(data + '');
    do {
        // pack three octets into four hexets
        o1 = data.charCodeAt(i++);
        o2 = data.charCodeAt(i++);
        o3 = data.charCodeAt(i++);
        bits = (o1 << 16) | (o2 << 8) | o3;
        h1 = (bits >> 18) & 0x3f;
        h2 = (bits >> 12) & 0x3f;
        h3 = (bits >> 6) & 0x3f;
        h4 = bits & 0x3f;
        // use hexets to index into b64, and append result to encoded string
        tmp_arr[ac++] =
            b64.charAt(h1) + b64.charAt(h2) + b64.charAt(h3) + b64.charAt(h4);
    } while (i < data.length);
    enc = tmp_arr.join('');
    switch (data.length % 3) {
        case 1:
            enc = enc.slice(0, -2) + '==';
            break;
        case 2:
            enc = enc.slice(0, -1) + '=';
            break;
    }
    return enc;
}
export function base64Decode(data) {
    // http://kevin.vanzonneveld.net
    // +   original by: Tyler Akins (http://rumkin.com)
    // +   improved by: Thunder.m
    // +      input by: Aman Gupta
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   bugfixed by: Onno Marsman
    // +   bugfixed by: Pellentesque Malesuada
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +      input by: Brett Zamir (http://brett-zamir.me)
    // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // *     example 1: base64_decode('S2V2aW4gdmFuIFpvbm5ldmVsZA==')
    // *     returns 1: 'Kevin van Zonneveld'
    // mozilla has this native
    // - but breaks in 2.0.0.12!
    // if (typeof this.window['atob'] == 'function') {
    //    return atob(data)
    // }
    var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
    var o1, o2, o3, h1, h2, h3, h4, bits, i = 0, ac = 0, dec = '', tmp_arr = [];
    if (!data) {
        return data;
    }
    data += '';
    do { // unpack four hexets into three octets using index points in b64
        h1 = b64.indexOf(data.charAt(i++));
        h2 = b64.indexOf(data.charAt(i++));
        h3 = b64.indexOf(data.charAt(i++));
        h4 = b64.indexOf(data.charAt(i++));
        bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
        o1 = bits >> 16 & 0xff;
        o2 = bits >> 8 & 0xff;
        o3 = bits & 0xff;
        if (h3 === 64) {
            tmp_arr[ac++] = String.fromCharCode(o1);
        }
        else if (h4 === 64) {
            tmp_arr[ac++] = String.fromCharCode(o1, o2);
        }
        else {
            tmp_arr[ac++] = String.fromCharCode(o1, o2, o3);
        }
    } while (i < data.length);
    dec = tmp_arr.join('');
    return dec;
}
export function urlSafeBase64Encode(v) {
    v = base64Encode(v);
    return v.replace(/\//g, '_').replace(/\+/g, '-');
}
export function urlSafeBase64Decode(v) {
    v = v.replace(/_/g, '/').replace(/-/g, '+');
    return base64Decode(v);
}
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