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* @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 numelDimension = require( '@stdlib/ndarray/base/numel-dimension' );
var getStride = require( '@stdlib/ndarray/base/stride' );
var getOffset = require( '@stdlib/ndarray/base/offset' );
var getData = require( '@stdlib/ndarray/base/data-buffer' );
var strided = require( '@stdlib/fft/base/fftpack/generic/rfftf' );
// MAIN //
/**
* Computes the forward discrete Fourier transform (DFT) of a real-valued one-dimensional ndarray.
*
* ## Notes
*
* - The function expects the following ndarrays:
*
* - a one-dimensional input ndarray.
* - a one-dimensional workspace ndarray containing pre-computed values.
*
* @param {ArrayLikeObject<Object>} arrays - array-like object containing ndarrays
* @returns {ndarrayLike} input ndarray
*
* @example
* var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
* var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' );
* var rffti = require( '@stdlib/fft/base/fftpack/ndarray/generic/rffti' );
*
* var N = 4;
* var len = scalar2ndarray( N, {
* 'dtype': 'int32'
* });
*
* var w = new Float64Vector( ( 2*N ) + 34 );
* rffti( [ w, len ] );
*
* var r = new Float64Vector( [ 1.0, 2.0, 3.0, 4.0 ] );
*
* var out = rfftf( [ r, w ] );
* // returns <ndarray>[ 10.0, -2.0, 2.0, -2.0 ]
*
* var bool = ( out === r );
* // returns true
*/
function rfftf( arrays ) {
var r;
var w;
r = arrays[ 0 ];
w = arrays[ 1 ];
strided( numelDimension( r, 0 ), getData( r ), getStride( r, 0 ), getOffset( r ), getData( w ), getStride( w, 0 ), getOffset( w ) ); // eslint-disable-line max-len
return r;
}
// EXPORTS //
module.exports = rfftf;
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