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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';
/**
* LAPACK routine to solve a system of equations with a tridiagonal matrix `T` following a precomputed factorization of `T - lambda*I`.
*
* @module @stdlib/lapack/base/dlagts
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
* var Int32Array = require( '@stdlib/array/int32' );
* var dlagts = require( '@stdlib/lapack/base/dlagts' );
*
* var A = new Float64Array( [ 4.0, 3.75, 3.7333333333333334 ] );
* var B = new Float64Array( [ 1.0, 1.0 ] );
* var C = new Float64Array( [ 0.25, 0.26666666666666666 ] );
* var D = new Float64Array( [ 0.0 ] );
* var IN = new Int32Array( [ 0, 0, 0 ] );
* var Y = new Float64Array( [ 1.0, 2.0, 3.0 ] );
* var TOL = new Float64Array( [ 0.0 ] );
*
* dlagts( 1, 3, A, B, C, D, IN, Y, TOL );
* // Y => <Float64Array>[ ~0.179, ~0.286, ~0.679 ]
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
* var Int32Array = require( '@stdlib/array/int32' );
* var dlagts = require( '@stdlib/lapack/base/dlagts' );
*
* var A = new Float64Array( [ 4.0, 3.75, 3.7333333333333334 ] );
* var B = new Float64Array( [ 1.0, 1.0 ] );
* var C = new Float64Array( [ 0.25, 0.26666666666666666 ] );
* var D = new Float64Array( [ 0.0 ] );
* var IN = new Int32Array( [ 0, 0, 0 ] );
* var Y = new Float64Array( [ 1.0, 2.0, 3.0 ] );
* var TOL = new Float64Array( [ 0.0 ] );
*
* dlagts.ndarray( 1, 3, A, 1, 0, B, 1, 0, C, 1, 0, D, 1, 0, IN, 1, 0, Y, 1, 0, TOL, 0 );
* // Y => <Float64Array>[ ~0.179, ~0.286, ~0.679 ]
*/
// 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 dlagts;
var tmp = tryRequire( join( __dirname, './native.js' ) );
if ( isError( tmp ) ) {
dlagts = main;
} else {
dlagts = tmp;
}
// EXPORTS //
module.exports = dlagts;
// exports: { "ndarray": "dlagts.ndarray" }
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