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* @license Apache-2.0
*
* Copyright (c) 2025 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MODULES //
var COMPLEX64_NAN = require( '@stdlib/constants/complex64/nan' );
var COMPLEX128_NAN = require( '@stdlib/constants/complex128/nan' );
var INT8_MAX = require( '@stdlib/constants/int8/max' );
var INT16_MAX = require( '@stdlib/constants/int16/max' );
var INT32_MAX = require( '@stdlib/constants/int32/max' );
var UINT8_MAX = require( '@stdlib/constants/uint8/max' );
var UINT16_MAX = require( '@stdlib/constants/uint16/max' );
var UINT32_MAX = require( '@stdlib/constants/uint32/max' );
// VARIABLES //
var SENTINEL_TABLE = {
'complex128': COMPLEX128_NAN,
'complex64': COMPLEX64_NAN,
'float64': NaN,
'float32': NaN,
'int8': INT8_MAX,
'int16': INT16_MAX,
'int32': INT32_MAX,
'uint8': UINT8_MAX,
'uint8c': UINT8_MAX,
'uint16': UINT16_MAX,
'uint32': UINT32_MAX,
'bool': false
};
// MAIN //
/**
* Returns a default sentinel value based on data type.
*
* @param {string} dtype - data type
* @returns {*} sentinel value
*
* @example
* var v = getSentinelValue( 'float64' );
* // returns NaN
*
* @example
* var v = getSentinelValue( 'int32' );
* // returns 2147483647
*
* @example
* var v = getSentinelValue( 'bool' );
* // returns false
*/
function getSentinelValue( dtype ) {
var s = SENTINEL_TABLE[ dtype ];
return ( s === void 0 ) ? NaN : s;
}
// EXPORTS //
module.exports = getSentinelValue;
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