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//>>built
define("dojox/encoding/bits", [
"dojo/_base/lang" // dojo.extend
], function(lang) {
var bits = lang.getObject("dojox.encoding.bits", true);
/*=====
bits = dojox.encoding.bits;
=====*/
bits.OutputStream = function(){
this.reset();
};
lang.extend(bits.OutputStream, {
reset: function(){
this.buffer = [];
this.accumulator = 0;
this.available = 8;
},
putBits: function(value, width){
while(width){
var w = Math.min(width, this.available);
var v = (w <= width ? value >>> (width - w) : value) << (this.available - w);
this.accumulator |= v & (255 >>> (8 - this.available));
this.available -= w;
if(!this.available){
this.buffer.push(this.accumulator);
this.accumulator = 0;
this.available = 8;
}
width -= w;
}
},
getWidth: function(){
return this.buffer.length * 8 + (8 - this.available);
},
getBuffer: function(){
var b = this.buffer;
if(this.available < 8){ b.push(this.accumulator & (255 << this.available)); }
this.reset();
return b;
}
});
bits.InputStream = function(buffer, width){
this.buffer = buffer;
this.width = width;
this.bbyte = this.bit = 0;
};
lang.extend(bits.InputStream, {
getBits: function(width){
var r = 0;
while(width){
var w = Math.min(width, 8 - this.bit);
var v = this.buffer[this.bbyte] >>> (8 - this.bit - w);
r <<= w;
r |= v & ~(~0 << w);
this.bit += w;
if(this.bit == 8){
++this.bbyte;
this.bit = 0;
}
width -= w;
}
return r;
},
getWidth: function(){
return this.width - this.bbyte * 8 - this.bit;
}
});
return bits;
});
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