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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 isndarrayLike = require( '@stdlib/assert/is-ndarray-like' );
var isMostlySafeCast = require( '@stdlib/ndarray/base/assert/is-mostly-safe-data-type-cast' );
var resolveStr = require( '@stdlib/ndarray/base/dtype-resolve-str' );
var copy = require( '@stdlib/ndarray/base/assign' );
var getDType = require( '@stdlib/ndarray/dtype' );
var sorthp = require( '@stdlib/blas/ext/sorthp' );
var format = require( '@stdlib/string/format' );
// MAIN //
/**
* Sorts the elements of an input ndarray along one or more ndarray dimensions using heapsort and assigns the results to an output ndarray.
*
* @param {ndarrayLike} x - input ndarray
* @param {ndarrayLike} y - output ndarray
* @param {(ndarrayLike|number|string)} [sortOrder=1.0] - sort order
* @param {Options} [options] - function options
* @param {IntegerArray} [options.dims] - list of dimensions over which to perform operation
* @throws {TypeError} first argument must be an ndarray-like object
* @throws {TypeError} second argument must be an ndarray-like object
* @throws {TypeError} sort order argument must be either an ndarray-like object, a numeric value, or a supported string
* @throws {TypeError} options argument must be an object
* @throws {RangeError} dimension indices must not exceed input ndarray bounds
* @throws {RangeError} number of dimension indices must not exceed the number of input ndarray dimensions
* @throws {TypeError} first argument cannot be safely cast to the data type of the second argument
* @throws {Error} must provide valid options
* @returns {ndarray} output ndarray
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
* var ndarray2array = require( '@stdlib/ndarray/to-array' );
* var zeros = require( '@stdlib/ndarray/zeros' );
* var ndarray = require( '@stdlib/ndarray/ctor' );
*
* // Create a data buffer:
* var xbuf = new Float64Array( [ 1.0, 2.0, -3.0, 4.0, -5.0, 6.0 ] );
*
* // Define the shape of the input array:
* var sh = [ 3, 1, 2 ];
*
* // Define the array strides:
* var sx = [ 2, 2, 1 ];
*
* // Define the index offset:
* var ox = 0;
*
* // Create an input ndarray:
* var x = new ndarray( 'float64', xbuf, sh, sx, ox, 'row-major' );
*
* // Create an output ndarray;
* var y = zeros( sh );
*
* // Perform operation:
* var out = assign( x, y );
* // returns <ndarray>
*
* var arr = ndarray2array( out );
* // returns [ [ [ -5.0, -3.0 ] ], [ [ 1.0, 2.0 ] ], [ [ 4.0, 6.0 ] ] ]
*
* var bool = ( y === out );
* // returns true
*/
function assign( x, y ) {
var nargs;
var xdt;
var ydt;
if ( !isndarrayLike( x ) ) {
throw new TypeError( format( 'invalid argument. First argument must be an ndarray-like object. Value: `%s`.', x ) );
}
if ( !isndarrayLike( y ) ) {
throw new TypeError( format( 'invalid argument. Second argument must be an ndarray-like object. Value: `%s`.', y ) );
}
xdt = getDType( x );
ydt = getDType( y );
if ( !isMostlySafeCast( xdt, ydt ) ) {
throw new TypeError( format( 'invalid argument. First argument cannot be safely cast to the output data type. Data types: [%s, %s].', resolveStr( xdt ), resolveStr( ydt ) ) );
}
nargs = arguments.length;
copy( [ x, y ] );
if ( nargs <= 2 ) {
return sorthp( y );
}
if ( nargs === 3 ) {
return sorthp( y, arguments[ 2 ] );
}
// nargs > 3
return sorthp( y, arguments[ 2 ], arguments[ 3 ] );
}
// EXPORTS //
module.exports = assign;
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