time-to-botec/squiggle/node_modules/@stdlib/number/float32/base/to-binary-string/README.md

To Binary String

Return a string giving the literal bit representation of a single-precision floating-point number.

Usage

var toBinaryStringf = require( '@stdlib/number/float32/base/to-binary-string' );

toBinaryStringf( x )

Returns a string giving the literal bit representation of a single-precision floating-point number.

var toFloat32 = require( '@stdlib/number/float64/base/to-float32' );

var str = toBinaryStringf( toFloat32( 4.0 ) );
// returns '01000000100000000000000000000000'

str = toBinaryStringf( toFloat32( 3.141592653589793 ) );
// returns '01000000010010010000111111011011'

str = toBinaryStringf( toFloat32( -1.0e38 ) );
// returns '11111110100101100111011010011001'

The function handles subnormals.

var toFloat32 = require( '@stdlib/number/float64/base/to-float32' );

str = toBinaryStringf( toFloat32( -3.14e-39 ) );
// returns '10000000001000100011000100001011'

str = toBinaryStringf( toFloat32( 1.4e-45 ) );
// returns '00000000000000000000000000000001'

The function handles special values.

var PINF = require( '@stdlib/constants/float32/pinf' );
var NINF = require( '@stdlib/constants/float32/ninf' );

str = toBinaryStringf( 0.0 );
// returns '00000000000000000000000000000000'

str = toBinaryStringf( -0.0 );
// returns '10000000000000000000000000000000'

str = toBinaryStringf( NaN );
// returns '01111111110000000000000000000000'

str = toBinaryStringf( PINF );
// returns '01111111100000000000000000000000'

str = toBinaryStringf( NINF );
// returns '11111111100000000000000000000000'

Examples

var randu = require( '@stdlib/random/base/randu' );
var round = require( '@stdlib/math/base/special/round' );
var pow = require( '@stdlib/math/base/special/pow' );
var float64ToFloat32 = require( '@stdlib/number/float64/base/to-float32' );
var toBinaryStringf = require( '@stdlib/number/float32/base/to-binary-string' );

var frac;
var sign;
var exp;
var b;
var x;
var i;

// Convert random numbers to literal bit representations...
for ( i = 0; i < 100; i++ ) {
    if ( randu() < 0.5 ) {
        sign = -1.0;
    } else {
        sign = 1.0;
    }
    frac = randu() * 10.0;
    exp = round( randu()*100.0 );
    if ( randu() < 0.5 ) {
        exp = -exp;
    }
    x = sign * frac * pow( 2.0, exp );
    x = float64ToFloat32( x );
    b = toBinaryStringf( x );
    console.log( b );
}