base64.lzx

<!---
      @topic Incubator
      @subtopic Utilities
  -->
<library>
<!--
  * Base64 Library for Laszlo
  *
  * Usage:
  *
  * <include href="base64.lzx" />
  *
  * var encoded_string = base64.encode(unencoded_string);
  * var decoded_string = base64.decode(encoded_string);
  *
  -->
    <view id="base64">
        <method name="decode" args="s">
            
            var b64s='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
    
            var d=[];
            var i=0;
            s=base64.replace(s,"\n","");
            s=base64.replace(s,"\r",""); 
            s=base64.replace(s,"=","");

            while (i<s.length) {            
                d[d.length] = String.fromCharCode((b64s.indexof(s.charAt(i)) << 2) | (b64s.indexof(s.charAt(i+1)) >> 4));
                d[d.length] = String.fromCharCode(((b64s.indexof(s.charAt(i+1)) & 15) << 4) | (b64s.indexof(s.charAt(i+2)) >> 2));
                d[d.length] = String.fromCharCode(((b64s.indexof(s.charAt(i+2)) & 3) << 6) | b64s.indexof(s.charAt(i+3)));
                i+=4;
            }

            if (s.length%4 == 2) d = d.slice(0, d.length-2);
            if (s.length%4 == 3) d = d.slice(0, d.length-1);

            return d.join("");
            
        </method>
        
        <method name="encode" args="s">
            
            var b64s='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
                
            var r=[]; 
            var i=0; 
            var dl=s.length;

            if ((dl%3) == 1) { s[s.length] = 0; s[s.length] = 0;}
            if ((dl%3) == 2) s[s.length] = 0;
            
            while (i<s.length) {
                r[r.length] = b64s.charAt(s.charCodeAt(i)>>2);              
                r[r.length] = b64s.charAt(((s.charCodeAt(i)&3)<<4) | (s.charCodeAt(i+1)>>4));
                r[r.length] = b64s.charAt(((s.charCodeAt(i+1)&15)<<2) | (s.charCodeAt(i+2)>>6));
                r[r.length] = b64s.charAt(s.charCodeAt(i+2)&63);
                if ((i%57)==54) r[r.length] = "\n";
                i+=3;
            }

            if ((dl%3) == 1) r[r.length-1] = r[r.length-2] = "=";
            if ((dl%3) == 2) r[r.length-1] = "=";

            return r.join("");
            
        </method>
                
        <method name="replace" args="s,c1,c2">
            var arr = [];
            arr = s.split(c1);
            return arr.join(c2);
        </method>
    </view>
</library>
<!-- * X_LZ_COPYRIGHT_BEGIN ***************************************************
* Copyright 2005-2007 Laszlo Systems, Inc.  All Rights Reserved.              *
* Use is subject to license terms.                                            *
* X_LZ_COPYRIGHT_END ****************************************************** -->
<!-- @LZX_VERSION@                                                         -->