Node.js Buffer wrapper that keeps track of your read and write offsets.
It also includes support for reading and writing 24-bit and 64-bit integers (via the int24, and ref libraries respectively).
var OffsetBuffer = require('offset-buffer'),
ob = new OffsetBuffer(15),
val;
// write offsets are managed automatically so you can do this:
ob.writeInt8(1); // ob.write_offset = 1
ob.writeInt32BE(100; // ob.write_offset = 5
ob.writeUInt64BE(1000); // ob.write_offset = 13
ob.writeUInt16BE(10); // ob.write_offset = 15
// you can also read from the buffer and it keeps track of your read offset:
val = ob.readInt8(); // ob.read_offset = 1
val = ob.readInt32BE(); // ob.read_offset = 5
val = ob.writeUInt64BE(); // ob.read_offset = 13
val = ob.writeUInt16BE(); // ob.read_offset = 15
// some extra convenience copy methods that keep track of your offsets
// (see code for more)
var buffer1 = new Buffer('abc'),
buffer2 = new Buffer('def'),
ob = new OffsetBuffer(6);
ob.copyFrom(buffer1); // ob == 'abc'
ob.copyFrom(buffer2); // ob == 'abcdef'npm install offset-buffer
npm test
MIT License