Press n or j to go to the next uncovered block, b, p or k for the previous block.
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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 isLayout = require( '@stdlib/blas/base/assert/is-layout' );
var isColumnMajor = require( '@stdlib/ndarray/base/assert/is-column-major-string' );
var stride2offset = require( '@stdlib/strided/base/stride2offset' );
var max = require( '@stdlib/math/base/special/fast/max' );
var format = require( '@stdlib/string/format' );
var ndarray = require( './ndarray.js' );
// MAIN //
/**
* Computes the Cartesian power for a double-precision floating-point strided array.
*
* @param {string} order - storage layout
* @param {NonNegativeInteger} N - number of indexed elements
* @param {NonNegativeInteger} k - power
* @param {Float64Array} x - input array
* @param {integer} strideX - stride length for `x`
* @param {Float64Array} out - output array
* @param {integer} LDO - stride length for the leading dimension of `out`
* @throws {TypeError} first argument must be a valid order
* @throws {RangeError} seventh argument must be greater than or equal to max(1,k)
* @returns {Float64Array} output array
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
*
* var x = new Float64Array( [ 1.0, 2.0 ] );
* var out = new Float64Array( 8 );
*
* dcartesianPower( 'row-major', x.length, 2, x, 1, out, 2 );
* // out => <Float64Array>[ 1.0, 1.0, 1.0, 2.0, 2.0, 1.0, 2.0, 2.0 ]
*/
function dcartesianPower( order, N, k, x, strideX, out, LDO ) {
var sa1;
var sa2;
var ox;
if ( !isLayout( order ) ) {
throw new TypeError( format( 'invalid argument. First argument must be a valid order. Value: `%s`.', order ) );
}
if ( LDO < max( 1, k ) ) {
throw new RangeError( format( 'invalid argument. Seventh argument must be greater than or equal to max(1,%d). Value: `%d`.', k, LDO ) );
}
if ( isColumnMajor( order ) ) {
sa1 = 1;
sa2 = LDO;
} else { // row-major
sa1 = LDO;
sa2 = 1;
}
ox = stride2offset( N, strideX );
return ndarray( N, k, x, strideX, ox, out, sa1, sa2, 0 );
}
// EXPORTS //
module.exports = dcartesianPower;
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