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* @license Apache-2.0
*
* Copyright (c) 2024 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 `L * D * L^T` factorization of a real symmetric positive definite tridiagonal matrix `A`.
*
* @module @stdlib/lapack/base/dpttrf
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
* var dpttrf = require( '@stdlib/lapack/base/dpttrf' );
*
* var D = new Float64Array( [ 4.0, 5.0, 6.0 ] );
* var E = new Float64Array( [ 1.0, 2.0 ] );
*
* dpttrf( 3, D, E );
* // D => <Float64Array>[ 4, 4.75, ~5.15789 ]
* // E => <Float64Array>[ 0.25, ~0.4210 ]
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
* var dpttrf = require( '@stdlib/lapack/base/dpttrf' );
*
* var D = new Float64Array( [ 4.0, 5.0, 6.0 ] );
* var E = new Float64Array( [ 1.0, 2.0 ] );
*
* dpttrf.ndarray( 3, D, 1, 0, E, 1, 0 );
* // D => <Float64Array>[ 4, 4.75, ~5.15789 ]
* // E => <Float64Array>[ 0.25, ~0.4210 ]
*/
// 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 dpttrf;
var tmp = tryRequire( join( __dirname, './native.js' ) );
if ( isError( tmp ) ) {
dpttrf = main;
} else {
dpttrf = tmp;
}
// EXPORTS //
module.exports = dpttrf;
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