All files dlamrg.js

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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';
 
// MODULES //
 
var format = require( '@stdlib/string/format' );
var base = require( './base.js' );
 
 
// MAIN //
 
/**
* Generates a permutation list to merge the entries of two independently sorted sets into a single set sorted in ascending order.
*
* ## Notes
*
* -   `A` should have `N1` + `N2` elements.
* -   `index` should have `N1` + `N2` elements and is overwritten with indices of array `A` such that the elements are in ascending order.
*
* @param {number} N1 - the length of the first sorted list to be merged.
* @param {number} N2 - the length of the second sorted list to be merged.
* @param {Float64Array} A - the array containing the first and the second sorted lists to be merged.
* @param {integer} DTRD1 - stride for first `N1` elements in `A`.
* @param {integer} DTRD2 - stride for first `N2` elements in `A`.
* @param {Int32Array} index - the array containing the indices of elements of `A` such that they are in ascending order.
* @throws {RangeError} first and second argument(s) must be a nonnegative integer
* @returns {integer} status code
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
* var Int32Array = require( '@stdlib/array/int32' )
*
* var A = new Float64Array( [ 1.0, 3.0, 2.0, 4.0, 5.0 ] );
* var index = new Int32Array( 5 );
*
* dlamrg( 2, 3, A, 1, 1, index );
* // index => <Int32Array>[ 0, 2, 1, 3, 4 ]
*/
function dlamrg( N1, N2, A, DTRD1, DTRD2, index ) {
	if ( N1 < 0 ) {
		throw new RangeError( format( 'invalid argument. First argument must be a nonnegative integer. Value: `%d`.', N1 ) );
	}
	if ( N2 < 0 ) {
		throw new RangeError( format( 'invalid argument. Second argument must be a nonnegative integer. Value: `%d`.', N2 ) );
	}
	return base( N1, N2, A, 1, 0, DTRD1, DTRD2, index, 1, 0 );
}
 
 
// EXPORTS //
 
module.exports = dlamrg;