All files / unitspace/lib resolve_data_type.js

62.31% Statements 43/69
100% Branches 1/1
0% Functions 0/1
62.31% Lines 43/69

Press n or j to go to the next uncovered block, b, p or k for the previous block.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 701x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x                                                     1x 1x 1x 1x 1x  
/**
* @license Apache-2.0
*
* Copyright (c) 2026 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 getDType = require( '@stdlib/ndarray/base/dtype' );
var resolveStr = require( '@stdlib/ndarray/base/dtype-resolve-str' );
var complexDataType = require( '@stdlib/complex/dtype' );
var ENUMS = require( './type_enums.js' );
 
 
// MAIN //
 
/**
* Resolves argument data types.
*
* @private
* @param {*} start - starting value
* @param {NonNegativeInteger} type - argument type
* @returns {Array} data types
*/
function resolveDataType( start, type ) {
	var out;
	var dt;

	// Initialize a data type array: [ start, out ]
	out = [ '', '' ];

	if ( type === ENUMS.NUMBER ) {
		// Why 'float64'? Because we don't have any way of knowing whether a number primitive is intended to be 'float32' or 'float64', and, in order to preserve precision, we simply assume 'float64'...
		dt = 'float64';
	} else if ( type === ENUMS.NDARRAY ) {
		dt = resolveStr( getDType( start ) );
	} else { // type === ENUMS.COMPLEX
		dt = complexDataType( start );
		if ( dt === null ) {
			// Why 'complex128'? Because we don't have any way of knowing whether a complex-like object is intended to be 'complex64' or 'complex128', and, in order to preserve precision, we simply assume 'complex128'...
			dt = 'complex128';
		}
	}
	out[ 0 ] = dt;

	// By default, the output array data type matches the data type of `start`:
	out[ 1 ] = dt;

	return out;
}
 
 
// EXPORTS //
 
module.exports = resolveDataType;