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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 solve a system of linear equations with a tri diagonal matrix using the LU factorization.
*
* @module @stdlib/lapack/base/dgtts2
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
* var Int32Array = require( '@stdlib/array/int32' );
* var dgtts2 = require( '@stdlib/lapack/base/dgtts2' );
*
* var DL = new Float64Array( [ 0.25, 0.26666667 ] );
* var D = new Float64Array( [ 4.0, 3.75, 3.73333333 ] );
* var DU = new Float64Array( [ 1.0, 0.73333333 ] );
* var DU2 = new Float64Array( [ 0.0 ] );
* var IPIV = new Int32Array( [ 0, 1, 2 ] );
* var B = new Float64Array( [ 7.0, 8.0, 7.0 ] );
*
* dgtts2( 'row-major', 1, 3, 1, DL, D, DU, DU2, IPIV, B, 3 );
* // B => <Float64Array>[ 1.4365079379889456, 1.2539682480442178, 1.5476190504889455 ]
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
* var Int32Array = require( '@stdlib/array/int32' );
* var dgtts2 = require( '@stdlib/lapack/base/dgtts2' );
*
* var DL = new Float64Array( [ 0.25, 0.26666667 ] );
* var D = new Float64Array( [ 4.0, 3.75, 3.73333333 ] );
* var DU = new Float64Array( [ 1.0, 0.73333333 ] );
* var DU2 = new Float64Array( [ 0.0 ] );
* var IPIV = new Int32Array( [ 0, 1, 2 ] );
* var B = new Float64Array( [ 7.0, 8.0, 7.0 ] );
*
* dgtts2.ndarray( 1, 3, 1, DL, 1, 0, D, 1, 0, DU, 1, 0, DU2, 1, 0, IPIV, 1, 0, B, 1, 1, 0 );
* // B => <Float64Array>[ 1.4365079379889456, 1.2539682480442178, 1.5476190504889455 ]
*/
// 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 dgtts2;
var tmp = tryRequire( join( __dirname, './native.js' ) );
if ( isError( tmp ) ) {
dgtts2 = main;
} else {
dgtts2 = tmp;
}
// EXPORTS //
module.exports = dgtts2;
// exports: { "ndarray": "dgtts2.ndarray" }
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