simple-buffer-cursor

simple-buffer-cursor

Simplify reading and writing to buffers by internally maintaining the position. This library exposes a wrapper for a buffer that uses similar read and write methods to those found in the Node Buffer API.

Usage:

npm install simple-buffer-cursor

const BufferCursor = require('simple-buffer-cursor');

let buffer = BufferCursor(Buffer.alloc(8));
buffer.writeUInt8(1);
buffer.writeUInt16BE(2);
buffer.writeUInt32BE(3);
buffer.writeBytes(Buffer.from([4]));
buffer.position = 0;
console.log(buffer.readUInt8());
console.log(buffer.readUInt16BE());
console.log(buffer.readUInt32BE());
console.log(buffer.readBytes());

API

• position: number - the current buffer cursor position

• eof: bool - whether the current position is at the end of the buffer

• buffer: Buffer - the underlying buffer

• readUInt8(): number - reads 1 byte

• readUInt16LE(): number - reads 2 bytes as 16-bit little-endian unsigned integer

• readUInt16BE(): number - reads 2 bytes as 16-bit big-endian unsigned integer

• readUInt32LE(): number - reads 4 bytes as 32-bit little-endian unsigned integer

• readUInt32BE(): number - reads 4 bytes as 32-bit big-endian unsigned integer

• readBytes([len]): Buffer - reads the optionally specified number of bytes. If no length is supplied, it reads to the end of the buffer.

• writeUInt8(number): undefined - writes 1 byte

• writeUInt16LE(number): undefined - writes a number as a 16-bit little-endian unsigned integer

• writeUInt16BE(number): undefined - writes a number as a 16-bit big-endian unsigned integer

• writeUInt32LE(number): undefined - writes a number as a 32-bit little-endian unsigned integer

• writeUInt32BE(number): undefined - writes a number as a 32-bit big-endian unsigned integer

• writeBytes(buffer): undefined - writes the supplied buffer to the cursor buffer