66 lines
1.6 KiB
JavaScript
66 lines
1.6 KiB
JavaScript
/**
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* @license Apache-2.0
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*
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* Copyright (c) 2018 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var FLOAT16 = require( '@stdlib/constants/float16/max' );
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var FLOAT32 = require( '@stdlib/constants/float32/max' );
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var FLOAT64 = require( '@stdlib/constants/float64/max' );
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// MAIN //
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/**
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* Returns the maximum finite value capable of being represented by a numeric real type.
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*
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* @param {string} dtype - numeric type
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* @throws {TypeError} must provide a recognized numeric type
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* @returns {number} maximum finite value
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*
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* @example
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* var m = realmax( 'float64' );
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* // returns 1.7976931348623157e+308
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*
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* @example
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* var m = realmax( 'float16' );
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* // returns 65504.0
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*
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* @example
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* var m = realmax( 'float32' );
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* // returns 3.4028234663852886e+38
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*/
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function realmax( dtype ) {
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switch ( dtype ) {
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case 'float64':
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return FLOAT64;
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case 'float32':
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return FLOAT32;
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case 'float16':
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return FLOAT16;
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default:
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throw new TypeError( 'invalid argument. Must provide a recognized type. Value: `'+dtype+'`.' );
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}
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}
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// EXPORTS //
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module.exports = realmax;
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