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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';
// MODULES //
var iladlr = require( '@stdlib/lapack/base/iladlr' ).ndarray;
// MAIN //
/**
* Returns the index of the last non-zero column in a matrix `A`.
*
* ## Notes
*
* - If provided an empty matrix or a matrix containing only zeros, the function returns `-1` (i.e., an invalid index).
*
* @private
* @param {PositiveInteger} M - number of rows in `A`
* @param {PositiveInteger} N - number of columns in `A`
* @param {Float64Array} A - input matrix
* @param {integer} strideA1 - stride of the first dimension of `A`
* @param {integer} strideA2 - stride of the second dimension of `A`
* @param {NonNegativeInteger} offsetA - index offset for `A`
* @returns {integer} index of the last non-zero column
*
* @example
* var Float64array = require( '@stdlib/array/float64' );
*
* var A = new Float64array( [ 1.0, 2.0, 0.0, 3.0, 4.0, 0.0 ] ); // => [ [ 1.0, 2.0, 0.0 ], [ 3.0, 4.0, 0.0 ] ]
*
* var out = iladlc( 2, 3, A, 3, 1, 0 );
* // returns 1
*
* @example
* var Float64array = require( '@stdlib/array/float64' );
*
* var A = new Float64array( [ 1.0, 3.0, 2.0, 4.0, 0.0, 0.0 ] ); // => [ [ 1.0, 2.0, 0.0 ], [ 3.0, 4.0, 0.0 ] ]
*
* var out = iladlc( 2, 3, A, 1, 2, 0 );
* // returns 1
*/
function iladlc( M, N, A, strideA1, strideA2, offsetA ) {
return iladlr( N, M, A, strideA2, strideA1, offsetA );
}
// EXPORTS //
module.exports = iladlc;
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