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| 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 | 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x | /**
* @license Apache-2.0
*
* Copyright (c) 2018 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 isComplexLike = require( '@stdlib/assert/is-complex-like' );
var real = require( '@stdlib/complex/float64/real' );
var imag = require( '@stdlib/complex/float64/imag' );
// MAIN //
/**
* Returns a strided array of real and imaginary components.
*
* @private
* @param {Float64Array} buf - output array
* @param {Array} arr - array containing complex numbers
* @returns {(Float64Array|null)} output array or null
*/
function fromArray( buf, arr ) {
var len;
var v;
var i;
var j;
len = arr.length;
j = 0;
for ( i = 0; i < len; i++ ) {
v = arr[ i ];
if ( !isComplexLike( v ) ) {
return null;
}
buf[ j ] = real( v );
buf[ j+1 ] = imag( v );
j += 2; // stride
}
return buf;
}
// EXPORTS //
module.exports = fromArray;
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