index.js (1728B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2018 The Stdlib Authors. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 'use strict'; 20 21 /** 22 * Single-precision floating-point positive infinity. 23 * 24 * @module @stdlib/constants/float32/pinf 25 * @type {number} 26 * 27 * @example 28 * var FLOAT32_PINF = require( '@stdlib/constants/float32/pinf' ); 29 * // returns +infinity 30 */ 31 32 // MODULES // 33 34 var Float32Array = require( '@stdlib/array/float32' ); 35 var Uint32Array = require( '@stdlib/array/uint32' ); 36 37 38 // VARIABLES // 39 40 var FLOAT32_VIEW = new Float32Array( 1 ); 41 var UINT32_VIEW = new Uint32Array( FLOAT32_VIEW.buffer ); 42 var v; 43 44 45 // MAIN // 46 47 /** 48 * Single-precision floating-point positive infinity. 49 * 50 * ## Notes 51 * 52 * Single-precision floating-point positive infinity has the bit sequence 53 * 54 * ```binarystring 55 * 0 11111111 00000000000000000000000 56 * ``` 57 * 58 * This bit sequence corresponds to the unsigned 32-bit integer `2139095040` and to the HEX value `0x7f800000`. 59 * 60 * @constant 61 * @type {number} 62 * @default 0x7f800000 63 * @see [IEEE 754]{@link https://en.wikipedia.org/wiki/IEEE_754-1985} 64 */ 65 var FLOAT32_PINF = 0x7f800000; 66 67 // Set the ArrayBuffer bit sequence: 68 UINT32_VIEW[ 0 ] = FLOAT32_PINF; 69 70 v = FLOAT32_VIEW[ 0 ]; 71 72 73 // EXPORTS // 74 75 module.exports = v;