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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 iterationOrder = require( '@stdlib/ndarray/base/iteration-order' );
var ndarray2object = require( '@stdlib/ndarray/base/ndarraylike2object' );
var numel = require( '@stdlib/ndarray/base/numel' );
var blockedaccessorWhileEach2d = require( './2d_blocked_accessors.js' );
var blockedaccessorWhileEach3d = require( './3d_blocked_accessors.js' );
var blockedaccessorWhileEach4d = require( './4d_blocked_accessors.js' );
var blockedaccessorWhileEach5d = require( './5d_blocked_accessors.js' );
var blockedaccessorWhileEach6d = require( './6d_blocked_accessors.js' );
var blockedaccessorWhileEach7d = require( './7d_blocked_accessors.js' );
var blockedaccessorWhileEach8d = require( './8d_blocked_accessors.js' );
var blockedaccessorWhileEach9d = require( './9d_blocked_accessors.js' );
var blockedaccessorWhileEach10d = require( './10d_blocked_accessors.js' );
var blockedWhileEach2d = require( './2d_blocked.js' );
var blockedWhileEach3d = require( './3d_blocked.js' );
var blockedWhileEach4d = require( './4d_blocked.js' );
var blockedWhileEach5d = require( './5d_blocked.js' );
var blockedWhileEach6d = require( './6d_blocked.js' );
var blockedWhileEach7d = require( './7d_blocked.js' );
var blockedWhileEach8d = require( './8d_blocked.js' );
var blockedWhileEach9d = require( './9d_blocked.js' );
var blockedWhileEach10d = require( './10d_blocked.js' );
var accessorWhileEach0d = require( './0d_accessors.js' );
var accessorWhileEach1d = require( './1d_accessors.js' );
var accessorWhileEach2d = require( './2d_accessors.js' );
var accessorWhileEach3d = require( './3d_accessors.js' );
var accessorWhileEach4d = require( './4d_accessors.js' );
var accessorWhileEach5d = require( './5d_accessors.js' );
var accessorWhileEach6d = require( './6d_accessors.js' );
var accessorWhileEach7d = require( './7d_accessors.js' );
var accessorWhileEach8d = require( './8d_accessors.js' );
var accessorWhileEach9d = require( './9d_accessors.js' );
var accessorWhileEach10d = require( './10d_accessors.js' );
var accessorWhileEachnd = require( './nd_accessors.js' );
var whileEach0d = require( './0d.js' );
var whileEach1d = require( './1d.js' );
var whileEach2d = require( './2d.js' );
var whileEach3d = require( './3d.js' );
var whileEach4d = require( './4d.js' );
var whileEach5d = require( './5d.js' );
var whileEach6d = require( './6d.js' );
var whileEach7d = require( './7d.js' );
var whileEach8d = require( './8d.js' );
var whileEach9d = require( './9d.js' );
var whileEach10d = require( './10d.js' );
var whileEachnd = require( './nd.js' );
// VARIABLES //
var WHILE_EACH = [
whileEach0d,
whileEach1d,
whileEach2d,
whileEach3d,
whileEach4d,
whileEach5d,
whileEach6d,
whileEach7d,
whileEach8d,
whileEach9d,
whileEach10d
];
var ACCESSOR_WHILE_EACH = [
accessorWhileEach0d,
accessorWhileEach1d,
accessorWhileEach2d,
accessorWhileEach3d,
accessorWhileEach4d,
accessorWhileEach5d,
accessorWhileEach6d,
accessorWhileEach7d,
accessorWhileEach8d,
accessorWhileEach9d,
accessorWhileEach10d
];
var BLOCKED_WHILE_EACH = [
blockedWhileEach2d, // 0
blockedWhileEach3d,
blockedWhileEach4d,
blockedWhileEach5d,
blockedWhileEach6d,
blockedWhileEach7d,
blockedWhileEach8d,
blockedWhileEach9d,
blockedWhileEach10d // 8
];
var BLOCKED_ACCESSOR_WHILE_EACH = [
blockedaccessorWhileEach2d, // 0
blockedaccessorWhileEach3d,
blockedaccessorWhileEach4d,
blockedaccessorWhileEach5d,
blockedaccessorWhileEach6d,
blockedaccessorWhileEach7d,
blockedaccessorWhileEach8d,
blockedaccessorWhileEach9d,
blockedaccessorWhileEach10d // 8
];
var MAX_DIMS = WHILE_EACH.length - 1;
// MAIN //
/**
* While a test condition is true, invokes a callback function for each element in an ndarray.
*
* ## Notes
*
* - A provided ndarray should be an object with the following properties:
*
* - **dtype**: data type.
* - **data**: data buffer.
* - **shape**: dimensions.
* - **strides**: stride lengths.
* - **offset**: index offset.
* - **order**: specifies whether an ndarray is row-major (C-style) or column major (Fortran-style).
*
* @param {ArrayLikeObject<Object>} arrays - array-like object containing one input array
* @param {Function} predicate - predicate function
* @param {Callback} fcn - callback function
* @param {*} [thisArg] - callback function execution context
* @returns {void}
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
* var naryFunction = require( '@stdlib/utils/nary-function' );
* var log = require( '@stdlib/console/log' );
*
* function predicate( value ) {
* return value === value;
* }
*
* // Create a data buffer:
* var xbuf = new Float64Array( 12 );
*
* // Define the shape of the array:
* var shape = [ 3, 1, 2 ];
*
* // Define the array strides:
* var sx = [ 4, 4, 1 ];
*
* // Define the index offset:
* var ox = 1;
*
* // Create an ndarray-like object:
* var x = {
* 'ref': null,
* 'dtype': 'float64',
* 'data': xbuf,
* 'shape': shape,
* 'strides': sx,
* 'offset': ox,
* 'order': 'row-major'
* };
*
* // Apply the callback function:
* whileEach( [ x ], predicate, naryFunction( log, 1 ) );
*/
function whileEach( arrays, predicate, fcn, thisArg ) {
var ndims;
var shx;
var x;
// Unpack the ndarray and standardize ndarray meta data:
x = ndarray2object( arrays[ 0 ] );
shx = x.shape;
ndims = shx.length;
// Determine whether we can avoid iteration altogether...
if ( ndims === 0 ) {
if ( x.accessorProtocol ) {
return ACCESSOR_WHILE_EACH[ ndims ]( x, predicate, fcn, thisArg );
}
return WHILE_EACH[ ndims ]( x, predicate, fcn, thisArg );
}
// Check whether we were provided an empty ndarray...
if ( numel( shx ) === 0 ) {
return;
}
// Determine whether we can avoid blocked iteration...
if ( ndims <= MAX_DIMS && iterationOrder( x.strides ) !== 0 ) {
// So long as iteration always moves in the same direction (i.e., no mixed sign strides), we can leverage cache-optimal (i.e., normal) nested loops without resorting to blocked iteration...
if ( x.accessorProtocol ) {
return ACCESSOR_WHILE_EACH[ ndims ]( x, predicate, fcn, thisArg );
}
return WHILE_EACH[ ndims ]( x, predicate, fcn, thisArg );
}
// Determine whether we can perform blocked iteration...
if ( ndims <= MAX_DIMS ) {
if ( x.accessorProtocol ) {
return BLOCKED_ACCESSOR_WHILE_EACH[ ndims-2 ]( x, predicate, fcn, thisArg );
}
return BLOCKED_WHILE_EACH[ ndims-2 ]( x, predicate, fcn, thisArg );
}
// Fall-through to linear view iteration without regard for how data is stored in memory (i.e., take the slow path)...
if ( x.accessorProtocol ) {
return accessorWhileEachnd( x, predicate, fcn, thisArg );
}
whileEachnd( x, predicate, fcn, thisArg );
}
// EXPORTS //
module.exports = whileEach;
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