- Author:
- David Nickerson <david.nickerson@gmail.com>
- Date:
- 2021-09-17 15:50:49+12:00
- Desc:
- tweak html formatting
- Permanent Source URI:
- https://models.fieldml.org/workspace/a1/rawfile/1b3862589abf79ae9119ee0b5e99a8b785d762e1/dojo-presentation/js/dojo/dojox/encoding/digests/_base.js
dojo.provide("dojox.encoding.digests._base");
(function(){
//TODO: see if it makes sense to meld this into one with the
// crypto base enums
var d=dojox.encoding.digests;
d.outputTypes={
// summary
// Enumeration for input and output encodings.
Base64:0, Hex:1, String:2, Raw:3
};
// word-based addition
d.addWords=function(/* word */a, /* word */b){
// summary
// add a pair of words together with rollover
var l=(a&0xFFFF)+(b&0xFFFF);
var m=(a>>16)+(b>>16)+(l>>16);
return (m<<16)|(l&0xFFFF); // word
};
// word-based conversion method, for efficiency sake;
// most digests operate on words, and this should be faster
// than the encoding version (which works on bytes).
var chrsz=8;
var mask=(1<<chrsz)-1;
d.stringToWord=function(/* string */s){
// summary
// convert a string to a word array
var wa=[];
for(var i=0, l=s.length*chrsz; i<l; i+=chrsz){
wa[i>>5]|=(s.charCodeAt(i/chrsz)&mask)<<(i%32);
}
return wa; // word[]
};
d.wordToString=function(/* word[] */wa){
// summary
// convert an array of words to a string
var s=[];
for(var i=0, l=wa.length*32; i<l; i+=chrsz){
s.push(String.fromCharCode((wa[i>>5]>>>(i%32))&mask));
}
return s.join(""); // string
}
d.wordToHex=function(/* word[] */wa){
// summary
// convert an array of words to a hex tab
var h="0123456789abcdef", s=[];
for(var i=0, l=wa.length*4; i<l; i++){
s.push(h.charAt((wa[i>>2]>>((i%4)*8+4))&0xF)+h.charAt((wa[i>>2]>>((i%4)*8))&0xF));
}
return s.join(""); // string
}
d.wordToBase64=function(/* word[] */wa){
// summary
// convert an array of words to base64 encoding, should be more efficient
// than using dojox.encoding.base64
var p="=", tab="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/", s=[];
for(var i=0, l=wa.length*4; i<l; i+=3){
var t=(((wa[i>>2]>>8*(i%4))&0xFF)<<16)|(((wa[i+1>>2]>>8*((i+1)%4))&0xFF)<<8)|((wa[i+2>>2]>>8*((i+2)%4))&0xFF);
for(var j=0; j<4; j++){
if(i*8+j*6>wa.length*32){
s.push(p);
} else {
s.push(tab.charAt((t>>6*(3-j))&0x3F));
}
}
}
return s.join(""); // string
};
})();
