forked from fanruan/fineui
windy
6 years ago
8 changed files with 649 additions and 3 deletions
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!(function () { |
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var _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; |
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// private method for UTF-8 encoding
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var _utf8_encode = function (string) { |
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string = string.replace(/\r\n/g, "\n"); |
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var utftext = ""; |
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for (var n = 0; n < string.length; n++) { |
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var c = string.charCodeAt(n); |
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if (c < 128) { |
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utftext += String.fromCharCode(c); |
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} else if ((c > 127) && (c < 2048)) { |
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utftext += String.fromCharCode((c >> 6) | 192); |
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utftext += String.fromCharCode((c & 63) | 128); |
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} else { |
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utftext += String.fromCharCode((c >> 12) | 224); |
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utftext += String.fromCharCode(((c >> 6) & 63) | 128); |
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utftext += String.fromCharCode((c & 63) | 128); |
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} |
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} |
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return utftext; |
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}; |
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// private method for UTF-8 decoding
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var _utf8_decode = function (utftext) { |
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var string = ""; |
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var i = 0; |
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var c = 0, c3 = 0, c2 = 0; |
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while (i < utftext.length) { |
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c = utftext.charCodeAt(i); |
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if (c < 128) { |
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string += String.fromCharCode(c); |
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i++; |
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} else if ((c > 191) && (c < 224)) { |
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c2 = utftext.charCodeAt(i + 1); |
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string += String.fromCharCode(((c & 31) << 6) | (c2 & 63)); |
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i += 2; |
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} else { |
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c2 = utftext.charCodeAt(i + 1); |
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c3 = utftext.charCodeAt(i + 2); |
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string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63)); |
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i += 3; |
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} |
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} |
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return string; |
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}; |
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_.extend(BI, { |
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encode: function (input) { |
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var output = ""; |
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var chr1, chr2, chr3, enc1, enc2, enc3, enc4; |
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var i = 0; |
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input = _utf8_encode(input); |
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while (i < input.length) { |
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chr1 = input.charCodeAt(i++); |
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chr2 = input.charCodeAt(i++); |
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chr3 = input.charCodeAt(i++); |
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enc1 = chr1 >> 2; |
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enc2 = ((chr1 & 3) << 4) | (chr2 >> 4); |
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enc3 = ((chr2 & 15) << 2) | (chr3 >> 6); |
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enc4 = chr3 & 63; |
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if (isNaN(chr2)) { |
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enc3 = enc4 = 64; |
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} else if (isNaN(chr3)) { |
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enc4 = 64; |
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} |
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output = output + _keyStr.charAt(enc1) + _keyStr.charAt(enc2) + _keyStr.charAt(enc3) + _keyStr.charAt(enc4); |
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} |
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return output; |
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}, |
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// public method for decoding
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decode: function (input) { |
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var output = ""; |
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var chr1, chr2, chr3; |
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var enc1, enc2, enc3, enc4; |
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var i = 0; |
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input = input.replace(/[^A-Za-z0-9\+\/\=]/g, ""); |
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while (i < input.length) { |
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enc1 = _keyStr.indexOf(input.charAt(i++)); |
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enc2 = _keyStr.indexOf(input.charAt(i++)); |
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enc3 = _keyStr.indexOf(input.charAt(i++)); |
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enc4 = _keyStr.indexOf(input.charAt(i++)); |
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chr1 = (enc1 << 2) | (enc2 >> 4); |
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chr2 = ((enc2 & 15) << 4) | (enc3 >> 2); |
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chr3 = ((enc3 & 3) << 6) | enc4; |
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output = output + String.fromCharCode(chr1); |
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if (enc3 != 64) { |
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output = output + String.fromCharCode(chr2); |
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} |
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if (enc4 != 64) { |
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output = output + String.fromCharCode(chr3); |
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} |
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} |
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output = _utf8_decode(output); |
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return output; |
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} |
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}); |
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})(); |
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