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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 blockedaccessorUntilEach2d = require( './2d_blocked_accessors.js' );
var blockedaccessorUntilEach3d = require( './3d_blocked_accessors.js' );
var blockedaccessorUntilEach4d = require( './4d_blocked_accessors.js' );
var blockedaccessorUntilEach5d = require( './5d_blocked_accessors.js' );
var blockedaccessorUntilEach6d = require( './6d_blocked_accessors.js' );
var blockedaccessorUntilEach7d = require( './7d_blocked_accessors.js' );
var blockedaccessorUntilEach8d = require( './8d_blocked_accessors.js' );
var blockedaccessorUntilEach9d = require( './9d_blocked_accessors.js' );
var blockedaccessorUntilEach10d = require( './10d_blocked_accessors.js' );
var blockedUntilEach2d = require( './2d_blocked.js' );
var blockedUntilEach3d = require( './3d_blocked.js' );
var blockedUntilEach4d = require( './4d_blocked.js' );
var blockedUntilEach5d = require( './5d_blocked.js' );
var blockedUntilEach6d = require( './6d_blocked.js' );
var blockedUntilEach7d = require( './7d_blocked.js' );
var blockedUntilEach8d = require( './8d_blocked.js' );
var blockedUntilEach9d = require( './9d_blocked.js' );
var blockedUntilEach10d = require( './10d_blocked.js' );
var accessorUntilEach0d = require( './0d_accessors.js' );
var accessorUntilEach1d = require( './1d_accessors.js' );
var accessorUntilEach2d = require( './2d_accessors.js' );
var accessorUntilEach3d = require( './3d_accessors.js' );
var accessorUntilEach4d = require( './4d_accessors.js' );
var accessorUntilEach5d = require( './5d_accessors.js' );
var accessorUntilEach6d = require( './6d_accessors.js' );
var accessorUntilEach7d = require( './7d_accessors.js' );
var accessorUntilEach8d = require( './8d_accessors.js' );
var accessorUntilEach9d = require( './9d_accessors.js' );
var accessorUntilEach10d = require( './10d_accessors.js' );
var accessorUntilEachnd = require( './nd_accessors.js' );
var untilEach0d = require( './0d.js' );
var untilEach1d = require( './1d.js' );
var untilEach2d = require( './2d.js' );
var untilEach3d = require( './3d.js' );
var untilEach4d = require( './4d.js' );
var untilEach5d = require( './5d.js' );
var untilEach6d = require( './6d.js' );
var untilEach7d = require( './7d.js' );
var untilEach8d = require( './8d.js' );
var untilEach9d = require( './9d.js' );
var untilEach10d = require( './10d.js' );
var untilEachnd = require( './nd.js' );
// VARIABLES //
var UNTIL_EACH = [
untilEach0d,
untilEach1d,
untilEach2d,
untilEach3d,
untilEach4d,
untilEach5d,
untilEach6d,
untilEach7d,
untilEach8d,
untilEach9d,
untilEach10d
];
var ACCESSOR_UNTIL_EACH = [
accessorUntilEach0d,
accessorUntilEach1d,
accessorUntilEach2d,
accessorUntilEach3d,
accessorUntilEach4d,
accessorUntilEach5d,
accessorUntilEach6d,
accessorUntilEach7d,
accessorUntilEach8d,
accessorUntilEach9d,
accessorUntilEach10d
];
var BLOCKED_UNTIL_EACH = [
blockedUntilEach2d, // 0
blockedUntilEach3d,
blockedUntilEach4d,
blockedUntilEach5d,
blockedUntilEach6d,
blockedUntilEach7d,
blockedUntilEach8d,
blockedUntilEach9d,
blockedUntilEach10d // 8
];
var BLOCKED_ACCESSOR_UNTIL_EACH = [
blockedaccessorUntilEach2d, // 0
blockedaccessorUntilEach3d,
blockedaccessorUntilEach4d,
blockedaccessorUntilEach5d,
blockedaccessorUntilEach6d,
blockedaccessorUntilEach7d,
blockedaccessorUntilEach8d,
blockedaccessorUntilEach9d,
blockedaccessorUntilEach10d // 8
];
var MAX_DIMS = UNTIL_EACH.length - 1;
// MAIN //
/**
* Invokes a callback function for each element in an ndarray until a predicate function returns a truthy value.
*
* ## 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() {
* return false;
* }
*
* // 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:
* untilEach( [ x ], predicate, naryFunction( log, 1 ) );
*/
function untilEach( 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_UNTIL_EACH[ ndims ]( x, predicate, fcn, thisArg );
}
return UNTIL_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_UNTIL_EACH[ ndims ]( x, predicate, fcn, thisArg );
}
return UNTIL_EACH[ ndims ]( x, predicate, fcn, thisArg );
}
// Determine whether we can perform blocked iteration...
if ( ndims <= MAX_DIMS ) {
if ( x.accessorProtocol ) {
return BLOCKED_ACCESSOR_UNTIL_EACH[ ndims-2 ]( x, predicate, fcn, thisArg ); // eslint-disable-line max-len
}
return BLOCKED_UNTIL_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 accessorUntilEachnd( x, predicate, fcn, thisArg );
}
untilEachnd( x, predicate, fcn, thisArg );
}
// EXPORTS //
module.exports = untilEach;
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