circular-buffer - npm Package Compare versions

Comparing version 0.0.1 to 0.0.2

index.js

		@@ -1,4 +0,40 @@
		function CircularBuffer(cap){
		if(!(this instanceof CircularBuffer))return new CircularBuffer(cap);
		//...
		function CircularBuffer(capacity){
		if(!(this instanceof CircularBuffer))return new CircularBuffer(capacity);
		if(typeof capacity!="number"\|\|capacity%1!=0\|\|capacity<1)
		throw new TypeError("Invalid capacity");
		var buffer=new Array(capacity),first=capacity-1,size=0;
		this.size=function(){return size;};
		this.capacity=function(){return capacity;};
		this.enq=function(value){
		if(first>0)first--; else first=capacity-1;
		buffer[first]=value;
		if(size<capacity)size++;
		};
		this.deq=function(){
		if(size==0)throw new RangeError("CircularBuffer dequeue on empty buffer");
		var value=buffer[first];
		if(first==capacity-1)first=0; else first++;
		size--;
		return value;
		};
		this.get=function(start,end){
		if(size==0&&start==0&&(end==undefined\|\|end==0))return [];
		if(typeof start!="number"\|\|start%1!=0\|\|start<0)throw new TypeError("Invalid start");
		if(start>=size)throw new RangeError("Index past end of buffer: "+start);

		if(end==undefined)return buffer[(first+start)%capacity];

		if(typeof end!="number"\|\|end%1!=0\|\|end<0)throw new TypeError("Invalid end");
		if(end>=size)throw new RangeError("Index past end of buffer: "+end);

		var res=[],i;
		for(i=start;i<=end;i++)res.push(buffer[(first+i)%capacity]);
		return res;
		};
		this.toarray=function(){
		if(size==0)return [];
		return this.get(0,size-1);
		}
		}

		module.exports=CircularBuffer;

package.json

		{
		"name": "circular-buffer",
		"version": "0.0.1",
		"version": "0.0.2",
		"description": "A NodeJS simple circular buffer implementation supporting indexing ",
		@@ -5,0 +5,0 @@ "main": "index.js",

README.md

		@@ -1,6 +0,6 @@
		#NodeJS Circular Buffer
		# NodeJS Circular Buffer

		This is a simple [circular buffer](http://en.wikipedia.org/wiki/Circular_buffer) implementation for NodeJS.

		##Usage
		## Usage

		@@ -25,4 +25,4 @@ Below is a sample session with a circular buffer with this package. It should answer most questions.
		buf.toarray(); // -> [3,2]
		buf.deq();
		buf.deq();
		buf.deq(); // -> 3
		buf.deq(); // -> 2
		buf.toarray(); // -> []
		@@ -32,3 +32,3 @@ buf.deq(); // -> throws RangeError("CircularBuffer dequeue on empty buffer")

		##Functions
		## Functions

		@@ -35,0 +35,0 @@ - `size()` -> `integer`

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