BinaryReader

A javascript object for simplifying the sequential reading of binary data.

Usage

$3

Number of bytes in the file:

reader.byteLength;
Current read position in bytes:

reader.bytePos;

$3

Create new BinaryReader:

// dataSource: URL, ArrayBuffer, Blob, or File object to be read
// callback: function called for reading data after data has been loaded
// Use the callback to ensure that the data has been recieved before attempting to read.
// Otherwise check byteLength before attempting to read data.
var reader = new BinaryReader(dataSource, callback);

Read bytes from the file:

// numBytes: integer number of bytes to read
// radix: base of the value returned.
var bytes = reader.nextBytes(numBytes[, radix]);

Move the read position:

// numBytes: integer number of bytes to move; negative integers move backwards
reader.move(numBytes);
// NOTE: the read position is tracked internally so
// there is no need to call move() after reading data

Set the read position:

// pos: location to set the read position to
reader.setReadPos(pos);

Potential Future Features

* Support for bit level reads