@fidian/DynamicBuffer

A wrapper around node.js Buffer class.

This is a fork of Oliver Herdin's DynamicBuffer module, altered to work with newer versions of Node. This one also includes some tests.

The Buffer class of node.js by default cannot be used as buffer to concatenate strings, like StringBuilder does for Java. This module contains a wrapper around node.js Buffer to concatenate strings, bytes and Buffers onto a Buffer. It automatically creates larger Buffer objects in the background when more space is needed.

var buff, clonedDynamic, dynamic, DynamicBuffer;

DynamicBuffer = require("@fidian/dynamic-buffer");

// Make a new dynamic buffer.
dynamic = new DynamicBuffer();

// Append a string with an optional encoding. You may also specify an
// optional length.
dynamic.append("a string");
dynamic.append("a string", "utf8");
dynamic.append("1234 <- just the numbers", 4);
dynamic.append("deadbeef", 2, "hex"); // Only DE AD

// Write an 8-bit byte.
dynamnic.write(127);

// Add another buffer or a DynamicBuffer
dynamic.concat(Buffer.from("abcd"));

// Get a copy of the DynamicBuffer. This allocates a new DynamicBuffer.
clonedDynamic = dynamic.clone();

// Shrink the DynamicBuffer to the minimum size needed for the current
// Buffer, or specify the size yourself.
dynamic.resizeUnderlyingBuffer();
dynamic.resizeUnderlyingBuffer(dynamic.length - 2); // Remove 2 bytes

// Returns a view of the underlying buffer. Changing the view will change
// the dynamic buffer as well.
buff = dynamic.getBuffer();

Development

Make sure all changes have tests. Please follow our contributor guide. This software falls under an MIT License.