bitfield

a very simple bitfield implementation using buffers

#bitfield

a very simple bitfield, compliant with the Bittorrent spec

npm install bitfield

####Example

var Bitfield = require("bitfield");
 
var field = new Bitfield(256); //create a bitfield with 256 bits 
 
field.set(128); //set the 128th bit 
field.set(128, true); //same as above 
 
field.get(128); //true 
field.get(200); //false (all values are initialised to `false`) 
field.get(1e3); //false (out-of-bounds is also false) 
 
field.set(128, false); //set the 128th bit to 0 again 
 
field.buffer; //the buffer used by bitfield 

####Methods Bitfield(data): data can be either a node.js buffer, WebGL Int8Array or numeric array, or a number representing the maximum number of supported bytes.

Bitfield#get(index): Returns a boolean indicating whether the bit is set.

Bitfield#set(index[, value]): value defaults to true. Sets the bit to 1 for a value of true or 0 for false.

Bitfield(data, { grow: size }): If you set an index that is out-of-bounds, the Bitfield will automatically grow so that the bitfield is big enough to contain the given index, up to the given size (in bit). If you want the Bitfield to grow indefinitely, pass Infinity as the size.

####Properties Bitfield#buffer: The contents of the bitfield.

Bitfield#grow: The passed growth option (defaults to 0).

##License

MIT