README

toWord

$NPM version$ $Build Status$ $Coverage Status$ $Dependencies$

Returns an unsigned 32-bit integer corresponding to the IEEE 754 binary representation of a single-precision floating-point number.

Installation

$ npm install math-float32-to-word

Usage

var toWord = require( 'math-float32-to-word' );

toWord( x )

Returns an unsigned 32-bit integer corresponding to the IEEE 754 binary representation of a single-precision floating-point number.

var float64ToFloat32 = require( 'float64-to-float32' );

var f32 = float64ToFloat32( 1.337 );
// returns 1.3370000123977661

var w = toWord( f32 );
// returns 1068180177 => 0 01111111 01010110010001011010001

Notes

The equivalent of this function in C/C++,

unsigned int toWord(float x) {
  return *(unsigned int*)&x;
}

Examples

var float64ToFloat32 = require( 'float64-to-float32' );
var toWord = require( 'math-float32-to-word' );

var word;
var f64;
var f32;
var i;

// Convert single-precision floating-point numbers to integers representing the binary literal...
for ( i = 0; i < 1000; i++ ) {
    f64 = Math.random()*100 - 50;
    f32 = float64ToFloat32( f64 );
    word = toWord( f32 );
    console.log( 'float64: %d => float32: %d => word: %d', f64, f32, word );

To run the example code from the top-level application directory,

$ node ./examples/index.js

Tests

Unit

This repository uses tape for unit tests. To run the tests, execute the following command in the top-level application directory:

$ make test

All new feature development should have corresponding unit tests to validate correct functionality.

Test Coverage

This repository uses Istanbul as its code coverage tool. To generate a test coverage report, execute the following command in the top-level application directory:

$ make test-cov

Istanbul creates a ./reports/coverage directory. To access an HTML version of the report,

$ make view-cov

Browser Support

This repository uses Testling for browser testing. To run the tests in a (headless) local web browser, execute the following command in the top-level application directory:

$ make test-browsers

To view the tests in a local web browser,

$ make view-browser-tests

License

MIT license.

math-float32-to-word

Usage no npm install needed!