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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 isFunction = require( '@stdlib/assert/is-function' );
var isReadOnly = require( '@stdlib/ndarray/base/assert/is-read-only' );
var isArrayLikeObject = require( '@stdlib/assert/is-array-like-object' );
var isPlainObject = require( '@stdlib/assert/is-plain-object' );
var isndarrayLike = require( '@stdlib/assert/is-ndarray-like' );
var isBoolean = require( '@stdlib/assert/is-boolean' ).isPrimitive;
var isMultiSlice = require( '@stdlib/assert/is-multi-slice' );
var hasOwnProp = require( '@stdlib/assert/has-own-property' );
var MultiSlice = require( '@stdlib/slice/multi' );
var args2multislice = require( '@stdlib/slice/base/args2multislice' );
var slice = require( '@stdlib/ndarray/base/slice' );
var base = require( '@stdlib/ndarray/base/fill-by' );
var format = require( '@stdlib/string/format' );
// MAIN //
/**
* Fills an input ndarray view according to a callback function.
*
* @param {ndarray} x - input ndarray
* @param {...*} s - slice arguments
* @param {Options} [options] - options
* @param {boolean} [options.strict] - boolean indicating whether to enforce strict bounds checking
* @param {Function} clbk - callback function
* @param {*} thisArg - callback execution context
* @throws {TypeError} first argument must be an ndarray-like object
* @throws {TypeError} options argument must be an object
* @throws {TypeError} must provide valid options
* @throws {TypeError} callback argument must be a function
* @throws {Error} too many arguments
* @throws {Error} cannot write to a read-only ndarray
* @returns {ndarray} input ndarray
*
* @example
* var zeros = require( '@stdlib/ndarray/zeros' );
* var MultiSlice = require( '@stdlib/slice/multi' );
* var Slice = require( '@stdlib/slice/ctor' );
* var ndarray2array = require( '@stdlib/ndarray/to-array' );
*
* function clbk() {
* return 5.0;
* }
*
* var x = zeros( [ 3, 4 ], {
* 'dtype': 'float64'
* });
*
* // Define the fill region:
* var s0 = new Slice( 1, 3 );
* var s1 = new Slice( 2, 4 );
* var s = new MultiSlice( s0, s1 );
*
* var y = fillSliceBy( x, s, clbk );
* // returns <ndarray>
*
* var bool = ( y === x );
* // returns true
*
* var arr = ndarray2array( x );
* // returns [ [ 0, 0, 0, 0 ], [ 0, 0, 5.0, 5.0 ], [ 0, 0, 5.0, 5.0 ] ]
*/
function fillSliceBy() {
var options;
var flgOpts;
var flgCtx;
var nargs;
var sArgs;
var opts;
var ctx;
var cb;
var ns;
var S;
var s;
var i;
var x;
opts = {
'strict': true
};
flgOpts = false;
flgCtx = false;
nargs = arguments.length;
x = arguments[ 0 ];
if ( !isndarrayLike( x ) ) {
throw new TypeError( format( 'invalid argument. First argument must be an ndarray. Value: `%s`.', x ) );
}
if ( isReadOnly( x ) ) {
throw new Error( 'invalid argument. Cannot write to a read-only array.' );
}
// Resolve function arguments:
if ( isFunction( arguments[ nargs - 1 ] ) ) { // Case: fillSliceBy( x, ???, ???, clbk )
cb = arguments[ nargs - 1 ];
if ( isPlainObject( arguments[ nargs - 2 ] ) ) { // Case: fillSliceBy( x, ???, options, clbk )
flgOpts = true;
options = arguments[ nargs - 2 ];
if ( nargs > 3 ) {
s = arguments[ nargs - 3 ];
}
} else if ( nargs > 2 ) { // Case: fillSliceBy( x, s, clbk )
s = arguments[ nargs - 2 ];
}
} else if ( isFunction( arguments[ nargs - 2 ] ) ) { // Case: fillSliceBy( x, ???, ???, clbk, thisArg )
cb = arguments[ nargs -2 ];
ctx = arguments[ nargs - 1 ];
flgCtx = true;
if ( isPlainObject( arguments[ nargs - 3 ] ) ) { // Case: fillSliceBy( x, ???, options, clbk, thisArg )
flgOpts = true;
options = arguments[ nargs - 3 ];
s = arguments[ nargs - 4 ];
} else { // Case: fillSliceBy( x, s, clbk, thisArg )
s = arguments[ nargs - 3 ];
}
} else {
throw new TypeError( 'invalid argument. Callback argument must be a function' );
}
// Resolve function options:
if ( flgOpts ) {
if ( hasOwnProp( options, 'strict' ) ) {
if ( !isBoolean( options.strict ) ) {
throw new TypeError( format( 'invalid option. `%s` option must be a boolean. Option: `%s`.', 'strict', options.strict ) );
}
opts.strict = options.strict;
}
}
// Resolve slice:
if ( isMultiSlice( s ) ) {
S = s;
if ( nargs > 5 ) {
throw new Error( 'invalid invocation. Too many arguments.' );
}
} else {
if ( isArrayLikeObject( s ) ) {
sArgs = s;
if ( nargs > 5 ) {
throw new Error( 'invalid invocation. Too many arguments.' );
}
} else {
sArgs = [];
ns = 0;
if ( flgCtx && flgOpts ) {
ns = nargs - 3;
} else if ( flgCtx && !flgOpts ) {
ns = nargs - 2;
} else if ( !flgCtx && flgOpts ) {
ns = nargs - 2;
} else {
ns = nargs - 1;
}
for ( i = 1; i < ns; i++ ) {
sArgs.push( arguments[ i ] );
}
}
try {
S = args2multislice( sArgs );
} catch ( err ) { // eslint-disable-line no-unused-vars
// Search for the first offending value...
for ( i = 0; i < sArgs.length; i++ ) {
try {
new MultiSlice( sArgs[ i ] ); // eslint-disable-line no-new
} catch ( err ) { // eslint-disable-line no-unused-vars
throw new TypeError( format( 'invalid argument. Slice arguments must be either a Slice, integer, null, or undefined. Value: `%s`.', String( sArgs[ i ] ) ) );
}
}
}
}
base( slice( x, S, opts.strict, true ), cb, ctx );
return x;
}
// EXPORTS //
module.exports = fillSliceBy;
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