@xtuc/ieee754

What is @xtuc/ieee754?

The @xtuc/ieee754 package provides utilities for encoding and decoding floating-point numbers according to the IEEE 754 standard. This standard is widely used for floating-point arithmetic in computer systems, and this package allows for direct manipulation of binary representations of these numbers in JavaScript.

What are @xtuc/ieee754's main functionalities?

Encoding floating-point numbers

This feature allows you to encode a JavaScript floating-point number into its IEEE 754 binary representation. The code sample shows how to write the number 123.456 into a buffer at a specified offset using the ieee754.write function.

const ieee754 = require('@xtuc/ieee754');
let buffer = new ArrayBuffer(8);
let view = new DataView(buffer);
ieee754.write(view, 123.456, 0, false, 52, 8);

Decoding floating-point numbers

This feature allows you to decode a binary representation of a floating-point number back into a JavaScript number. The code sample demonstrates reading a number from a buffer where it was previously stored using the DataView's setFloat64 method, and then decoding it with ieee754.read.

const ieee754 = require('@xtuc/ieee754');
let buffer = new ArrayBuffer(8);
let view = new DataView(buffer);
view.setFloat64(0, 123.456, false);
let number = ieee754.read(view, 0, false, 52, 8);

Other packages similar to @xtuc/ieee754

ieee754

The 'ieee754' package provides similar functionality for encoding and decoding IEEE 754 floating-point numbers. It is a widely used package and serves as a low-level utility for handling binary floating-point data.

buffer

The 'buffer' package includes functionality for handling binary data in Node.js, which indirectly allows for manipulation of IEEE 754 floating-point numbers. It is more general-purpose compared to @xtuc/ieee754, which is specifically focused on IEEE 754 operations.

README

ieee754

Read/write IEEE754 floating point numbers from/to a Buffer or array-like object.

install

npm install ieee754

methods

var ieee754 = require('ieee754')

The ieee754 object has the following functions:

ieee754.read = function (buffer, offset, isLE, mLen, nBytes)
ieee754.write = function (buffer, value, offset, isLE, mLen, nBytes)

The arguments mean the following:

• buffer = the buffer
• offset = offset into the buffer
• value = value to set (only for write)
• isLe = is little endian?
• mLen = mantissa length
• nBytes = number of bytes

what is ieee754?

The IEEE Standard for Floating-Point Arithmetic (IEEE 754) is a technical standard for floating-point computation. Read more.

license

BSD 3 Clause. Copyright (c) 2008, Fair Oaks Labs, Inc.