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now base64.js is regexp-based
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git-svn-id: http://svn.coderepos.org/share/lang/javascript/Base64/trunk@30681 d0d07461-0603-4401-acd4-de1884942a52
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dankogai committed Mar 1, 2009
1 parent f71de01 commit 88b7a37
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6 changes: 4 additions & 2 deletions base64.html
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@@ -1,11 +1,13 @@
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<!-- $Id: dom2json.html,v 0.1 2008/06/14 19:58:00 dankogai Exp $ -->
<!-- $Id: base64.html,v 1.1 2009/03/01 22:00:28 dankogai Exp dankogai $ -->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Base64</title>
<title>Test for base64.js</title>
</head>
<body>
<h1>Test for base64.js</h1>
<p>$Id: base64.html,v 1.1 2009/03/01 22:00:28 dankogai Exp dankogai $</p>
<table width="640"><tbody>
<tr><th width="50%">Text</th><th>Base64
(URL Safe <input id="encodeURI" type="checkbox" onclick="doit()">)</th></tr>
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255 changes: 83 additions & 172 deletions base64.js
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@@ -1,215 +1,126 @@
/*
* $Id: base64.js,v 0.9 2009/03/01 20:51:18 dankogai Exp dankogai $
* $Id: base64.js,v 1.0 2009/03/01 22:00:51 dankogai Exp dankogai $
*
* History:
* dankogai's original: character-based
* drry's fix: split string to array then join
* new version: regexp-based
*/

(function(){

var b64chars
var b64chars
= 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';

var b64charcodes = function(){
var a = [];
var codeA = 'A'.charCodeAt(0);
var codea = 'a'.charCodeAt(0);
var code0 = '0'.charCodeAt(0);
for (var i = 0; i < 26; i ++) a.push(codeA + i);
for (var i = 0; i < 26; i ++) a.push(codea + i);
for (var i = 0; i < 10; i ++) a.push(code0 + i);
a.push('+'.charCodeAt(0));
a.push('/'.charCodeAt(0));
return a;
}();

var b64tab = function(bin){
var t = {};
for (var i = 0, l = bin.length; i < l; i++) t[bin.charAt(i)] = i;
return t;
}(b64chars);

var stringToArray = function(s){
var a = [];
for (var i = 0, l = s.length; i < l; i ++) a[i] = s.charCodeAt(i);
return a;
var sub_toBase64 = function(m){
var n = (m.charCodeAt(0) << 16)
| (m.charCodeAt(1) << 8)
| (m.charCodeAt(2) );
return b64chars.charAt( n >>> 18)
+ b64chars.charAt((n >>> 12) & 63)
+ b64chars.charAt((n >>> 6) & 63)
+ b64chars.charAt( n & 63);
};

var convertUTF8ArrayToBase64 = function(bin){
var toBase64 = function(bin){
if (bin.match(/[^\x00-\xFF]/)) throw 'unsupported character found' ;
var padlen = 0;
while (bin.length % 3){
bin.push(0);
while(bin.length % 3) {
bin += '\0';
padlen++;
};
var b64 = [];
for (var i = 0, l = bin.length; i < l; i += 3){
var c0 = bin[i], c1 = bin[i+1], c2 = bin[i+2];
if (c0 >= 256 || c1 >= 256 || c2 >= 256)
throw 'unsupported character found';
var n = (c0 << 16) | (c1 << 8) | c2;
b64.push(
b64charcodes[ n >>> 18],
b64charcodes[(n >>> 12) & 63],
b64charcodes[(n >>> 6) & 63],
b64charcodes[ n & 63]
);
}
while (padlen--) b64[b64.length - padlen - 1] = '='.charCodeAt(0);
return String.fromCharCode.apply(String, b64);
var b64 = bin.replace(/[\x00-\xFF]{3}/g, sub_toBase64);
if (!padlen) return b64;
b64 = b64.substr(0, b64.length - padlen);
while(padlen--) b64 += '=';
return b64;
};

var convertBase64ToUTF8Array = function(b64){
b64 = b64.replace(/[^A-Za-z0-9+\/]+/g, '');
var bin = [];
var padlen = b64.length % 4;
for (var i = 0, l = b64.length; i < l; i += 4){
var n = ((b64tab[b64.charAt(i )] || 0) << 18)
| ((b64tab[b64.charAt(i+1)] || 0) << 12)
| ((b64tab[b64.charAt(i+2)] || 0) << 6)
| ((b64tab[b64.charAt(i+3)] || 0));
bin.push(
( n >> 16 ),
( (n >> 8) & 0xff ),
( n & 0xff )
);
}
bin.length -= [0,0,2,1][padlen];
return bin;
};
var btoa = window.btoa || toBase64;

var convertUTF16ArrayToUTF8Array = function(uni){
var bin = [];
for (var i = 0, l = uni.length; i < l; i++){
var n = uni[i];
if (n < 0x80)
bin.push(n);
else if (n < 0x800)
bin.push(
0xc0 | (n >>> 6),
0x80 | (n & 0x3f));
else
bin.push(
0xe0 | ((n >>> 12) & 0x0f),
0x80 | ((n >>> 6) & 0x3f),
0x80 | (n & 0x3f));
}
return bin;
var sub_fromBase64 = function(m){
var n = (b64tab[b64.charAt(0)] << 18)
| (b64tab[b64.charAt(1)] << 12)
| (b64tab[b64.charAt(2)] << 6)
| (b64tab[b64.charAt(3)]);
return String.fromCharCode( n >> 16 )
+ String.fromCharCode( (n >> 8) & 0xff )
+ String.fromCharCode( n & 0xff );
};

var convertUTF8ArrayToUTF16Array = function(bin){
var uni = [];
for (var i = 0, l = bin.length; i < l; i++){
var c0 = bin[i];
if (c0 < 0x80){
uni.push(c0);
}else{
var c1 = bin[++i];
if (c0 < 0xe0){
uni.push(((c0 & 0x1f) << 6) | (c1 & 0x3f));
}else{
var c2 = bin[++i];
uni.push(
((c0 & 0x0f) << 12) | ((c1 & 0x3f) << 6) | (c2 & 0x3f)
);
}
}

var fromBase64 = function(b64){
b64 = b64.replace(/[^A-Za-z0-9\+\/]/g, '');
var padlen = 0;
while(b64.length % 4){
b64 += 'A';
padlen++;
}
return uni;
};

var convertUTF8StringToBase64 = function(bin){
return convertUTF8ArrayToBase64(stringToArray(bin));
var bin = b64.replace(/A-Za-z0-9\+\/{4}/g, sub_fromBase64);
bin.length -= [0,0,2,1][padlen];
return bin;
};

var convertBase64ToUTF8String = function(b64){
return String.fromCharCode.apply(String, convertBase64ToUTF8Array(b64));
};
var atob = window.atob || fromBase64;

var convertUTF8StringToUTF16Array = function(bin){
return convertUTF8ArrayToUTF16Array(stringToArray(bin));
};
var re_char_nonascii = /[^\x00-\xFF]/g;

var convertUTF8ArrayToUTF16String = function(bin){
return String.fromCharCode.apply(String, convertUTF8ArrayToUTF16Array(bin));
var sub_char_nonascii = function(m){
var n = m.charCodeAt(0);
return n < 0x800 ? String.fromCharCode(0xc0 | (n >>> 6))
+ String.fromCharCode(0x80 | (n & 0x3f))
: String.fromCharCode(0xe0 | ((n >>> 12) & 0x0f))
+ String.fromCharCode(0x80 | ((n >>> 6) & 0x3f))
+ String.fromCharCode(0x80 | (n & 0x3f))
;
};

var convertUTF8StringToUTF16String = function(bin){
return String.fromCharCode.apply(String, convertUTF8ArrayToUTF16Array(stringToArray(bin)));
var utob = function(uni){
return uni.replace(re_char_nonascii, sub_char_nonascii);
};

var convertUTF16StringToUTF8Array = function(uni){
return convertUTF16ArrayToUTF8Array(stringToArray(uni));
var re_bytes_nonascii
= /(?:[\xC0-\xDF][\x80-\xBF]|[\xE0-\xEF][\x80-\xBF]{2}|[\xF0-\xF7][\x80-\xBF]{3})/g;

var sub_bytes_nonascii = function(m){
var c0 = m.charCodeAt(0);
var c1 = m.charCodeAt(1);
if(c0 < 0xe0){
return String.fromCharCode(((c0 & 0x1f) << 6) | (c1 & 0x3f));
}else{
var c2 = m.charCodeAt(2);
return String.fromCharCode(
((c0 & 0x0f) << 12) | ((c1 & 0x3f) << 6) | (c2 & 0x3f)
);
}
};

var convertUTF16ArrayToUTF8String = function(uni){
return String.fromCharCode.apply(String, convertUTF16ArrayToUTF8Array(uni));
var btou = function(bin){
return bin.replace(re_bytes_nonascii, sub_bytes_nonascii);
};

var convertUTF16StringToUTF8String = function(uni){
return String.fromCharCode.apply(String, convertUTF16ArrayToUTF8Array(stringToArray(uni)));
};

if (window.btoa){
var btoa = window.btoa;
var convertUTF16StringToBase64 = function (uni){
return btoa(convertUTF16StringToUTF8String(uni));
};
}
else {
var btoa = convertUTF8StringToBase64;
var convertUTF16StringToBase64 = function (uni){
return convertUTF8ArrayToBase64(convertUTF16StringToUTF8Array(uni));
};
}

if (window.atob){
var atob = window.atob;
var convertBase64ToUTF16String = function (b64){
return convertUTF8StringToUTF16String(atob(b64));
};
}
else {
var atob = convertBase64ToUTF8String;
var convertBase64ToUTF16String = function (b64){
return convertUTF8ArrayToUTF16String(convertBase64ToUTF8Array(b64));
};
}

window.Base64 = {
convertUTF8ArrayToBase64:convertUTF8ArrayToBase64,
convertByteArrayToBase64:convertUTF8ArrayToBase64,
convertBase64ToUTF8Array:convertBase64ToUTF8Array,
convertBase64ToByteArray:convertBase64ToUTF8Array,
convertUTF16ArrayToUTF8Array:convertUTF16ArrayToUTF8Array,
convertUTF16ArrayToByteArray:convertUTF16ArrayToUTF8Array,
convertUTF8ArrayToUTF16Array:convertUTF8ArrayToUTF16Array,
convertByteArrayToUTF16Array:convertUTF8ArrayToUTF16Array,
convertUTF8StringToBase64:convertUTF8StringToBase64,
convertBase64ToUTF8String:convertBase64ToUTF8String,
convertUTF8StringToUTF16Array:convertUTF8StringToUTF16Array,
convertUTF8ArrayToUTF16String:convertUTF8ArrayToUTF16String,
convertByteArrayToUTF16String:convertUTF8ArrayToUTF16String,
convertUTF8StringToUTF16String:convertUTF8StringToUTF16String,
convertUTF16StringToUTF8Array:convertUTF16StringToUTF8Array,
convertUTF16StringToByteArray:convertUTF16StringToUTF8Array,
convertUTF16ArrayToUTF8String:convertUTF16ArrayToUTF8String,
convertUTF16StringToUTF8String:convertUTF16StringToUTF8String,
convertUTF16StringToBase64:convertUTF16StringToBase64,
convertBase64ToUTF16String:convertBase64ToUTF16String,
fromBase64:convertBase64ToUTF8String,
toBase64:convertUTF8StringToBase64,
if (!this['Base64']) Base64 = {
fromBase64:fromBase64,
toBase64:toBase64,
atob:atob,
btoa:btoa,
utob:convertUTF16StringToUTF8String,
btou:convertUTF8StringToUTF16String,
encode:convertUTF16StringToBase64,
utob:utob,
btou:btou,
encode:function(u){ return btoa(utob(u)) },
encodeURI:function(u){
return convertUTF16StringToBase64(u).replace(/[+\/]/g, function(m0){
return btoa(utob(u)).replace(/[+\/]/g, function(m0){
return m0 == '+' ? '-' : '_';
}).replace(/=+$/, '');
},
decode:function(a){
return convertBase64ToUTF16String(a.replace(/[-_]/g, function(m0){
decode:function(a){
return btou(atob(a.replace(/[-_]/g, function(m0){
return m0 == '-' ? '+' : '/';
}));
})));
}
};

})();
})();

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