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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 resolveUplo = require( '@stdlib/blas/base/matrix-triangle-resolve-enum' );
var addon = require( './../src/addon.node' );
// MAIN //
/**
* Copies all or part of a matrix `A` to another matrix `B` using alternative indexing semantics.
*
* @param {string} uplo - specifies whether to copy the upper or lower triangular/trapezoidal part of matrix `A`
* @param {NonNegativeInteger} M - number of rows in matrix `A`
* @param {NonNegativeInteger} N - number of columns in matrix `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 - starting index for `A`
* @param {Float64Array} B - output matrix
* @param {integer} strideB1 - stride of the first dimension of `B`
* @param {integer} strideB2 - stride of the second dimension of `B`
* @param {NonNegativeInteger} offsetB - starting index for `B`
* @returns {Float64Array} `B`
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
*
* var A = new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] );
* var B = new Float64Array( 6 );
*
* dlacpy( 'all', 2, 2, A, 2, 1, 1, B, 2, 1, 2 );
* // B => <Float64Array>[ 0.0, 0.0, 2.0, 3.0, 4.0, 5.0 ]
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
*
* var A = new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] );
* var B = new Float64Array( 6 );
*
* dlacpy( 'upper', 2, 2, A, 2, 1, 1, B, 2, 1, 2 );
* // B => <Float64Array>[ 0.0, 0.0, 2.0, 3.0, 0.0, 5.0 ]
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
*
* var A = new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] );
* var B = new Float64Array( 6 );
*
* dlacpy( 'lower', 2, 2, A, 2, 1, 1, B, 2, 1, 2 );
* // B => <Float64Array>[ 0.0, 0.0, 2.0, 0.0, 4.0, 5.0 ]
*/
function dlacpy( uplo, M, N, A, strideA1, strideA2, offsetA, B, strideB1, strideB2, offsetB ) { // eslint-disable-line max-len, max-params
var resolvedUplo = resolveUplo( uplo );
if ( resolvedUplo === null ) {
resolvedUplo = 0; // fallback
}
addon.ndarray( resolvedUplo, M, N, A, strideA1, strideA2, offsetA, B, strideB1, strideB2, offsetB ); // eslint-disable-line max-len
return B;
}
// EXPORTS //
module.exports = dlacpy;
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