| New file |
|---|
| 0,0 → 1,68 |
|---|
| if(!dojo._hasResource["dojox.encoding.bits"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code. |
| dojo._hasResource["dojox.encoding.bits"] = true; |
| dojo.provide("dojox.encoding.bits"); |
| |
| dojox.encoding.bits.OutputStream = function(){ |
| this.reset(); |
| }; |
| |
| dojo.extend(dojox.encoding.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; |
| } |
| }); |
| |
| dojox.encoding.bits.InputStream = function(buffer, width){ |
| this.buffer = buffer; |
| this.width = width; |
| this.bbyte = this.bit = 0; |
| }; |
| |
| dojo.extend(dojox.encoding.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; |
| } |
| }); |
| |
| } |