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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';
/**
* LAPACK routine to compute the row and column scaling factors intended to equilibrate a symmetric positive definite matrix `A` in packed storage and reduce it's condition number (with respect to the two-norm).
*
* @module @stdlib/lapack/base/dppequ
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
* var dppequ = require( '@stdlib/lapack/base/dppequ' );
*
* var AP = new Float64Array( [ 1.0, 2.0, 3.0, 5.0, 6.0, 9.0 ] );
* var S = new Float64Array( 3 );
* var out = new Float64Array( 2 );
*
* dppequ( 'row-major', 'L', 3, AP, S, out );
* // S => <Float64Array>[ 1, ~0.58, ~0.33 ]
* // out => <Float64Array>[ ~0.33, 9 ]
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
* var dppequ = require( '@stdlib/lapack/base/dppequ' );
*
* var AP = new Float64Array( [ 1.0, 2.0, 3.0, 5.0, 6.0, 9.0 ] );
* var S = new Float64Array( 3 );
* var out = new Float64Array( 2 );
*
* dppequ.ndarray( 'row-major', 'L', 3, AP, 1, 0, S, 1, 0, out, 1, 0 );
* // S => <Float64Array>[ 1, ~0.58, ~0.33 ]
* // out => <Float64Array>[ ~0.33, 9 ]
*/
// MODULES //
var join = require( 'path' ).join;
var tryRequire = require( '@stdlib/utils/try-require' );
var isError = require( '@stdlib/assert/is-error' );
var main = require( './main.js' );
// MAIN //
var dppequ;
var tmp = tryRequire( join( __dirname, './native.js' ) );
if ( isError( tmp ) ) {
dppequ = main;
} else {
dppequ = tmp;
}
// EXPORTS //
module.exports = dppequ;
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