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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.
*/
/* eslint-disable max-params, max-len */
'use strict';
// MODULES //
var gwaxpb = require( '@stdlib/blas/ext/base/gwaxpb' ).ndarray;
// MAIN //
/**
* Rescales each element in a strided array from the range `[a, b]` to the range `[c, d]` and assigns the results to a strided array `y` using alternative indexing semantics.
*
* @param {PositiveInteger} N - number of indexed elements
* @param {number} a - lower bound of the input range
* @param {number} b - upper bound of the input range
* @param {number} c - lower bound of the output range
* @param {number} d - upper bound of the output range
* @param {NumericArray} x - input array
* @param {integer} strideX - `x` stride length
* @param {NonNegativeInteger} offsetX - starting `x` index
* @param {NumericArray} y - output array
* @param {integer} strideY - `y` stride length
* @param {NonNegativeInteger} offsetY - starting `y` index
* @returns {NumericArray} output array
*
* @example
* var x = [ 1.0, 3.0, 5.0, 7.0, 9.0 ];
* var y = [ 0.0, 0.0, 0.0, 0.0, 0.0 ];
*
* grescale( x.length, 1.0, 9.0, 2.0, 6.0, x, 1, 0, y, 1, 0 );
* // y => [ 2.0, 3.0, 4.0, 5.0, 6.0 ]
*/
function grescale( N, a, b, c, d, x, strideX, offsetX, y, strideY, offsetY ) {
var alpha = ( d - c ) / ( b - a );
return gwaxpb( N, alpha, c - ( a * alpha ), x, strideX, offsetX, y, strideY, offsetY );
}
// EXPORTS //
module.exports = grescale;
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