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* @license Apache-2.0
*
* Copyright (c) 2018 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 no-invalid-this */
'use strict';
// MODULES //
var isInteger = require( '@stdlib/assert/is-integer' ).isPrimitive;
var getIndex = require( '@stdlib/ndarray/base/ind' );
var format = require( '@stdlib/string/format' );
// MAIN //
/**
* Sets an array element.
*
* ## Notes
*
* - The number of indices should **equal** the number of dimensions. Accordingly, for zero-dimensional arrays, no indices should be provided.
*
* @private
* @param {...integer} [idx] - indices
* @param {*} v - value to set
* @throws {Error} cannot write to a read-only array
* @throws {TypeError} provided indices must be integer valued
* @throws {RangeError} index exceeds array dimensions
* @throws {RangeError} number of indices must equal the number of dimensions
* @returns {ndarray} ndarray instance
*/
function set() {
var idx;
var ind;
var M;
var i;
if ( this._flags.READONLY ) {
throw new Error( 'invalid invocation. Cannot write to a read-only array.' );
}
if ( arguments.length !== this._ndims+1 ) {
throw new RangeError( format( 'invalid arguments. Number of indices must match the number of dimensions. ndims: `%u`. nargs: `%u`.', this._ndims, arguments.length ) );
}
idx = this._offset;
M = this._submode.length;
for ( i = 0; i < arguments.length-1; i++ ) {
if ( !isInteger( arguments[ i ] ) ) {
throw new TypeError( format( 'invalid argument. Indices must be integer valued. Argument: `%i`. Value: `%s`.', i, arguments[ i ] ) );
}
ind = getIndex( arguments[ i ], this._shape[ i ]-1, this._submode[ i%M ] ); // eslint-disable-line max-len
idx += this._strides[ i ] * ind;
}
if ( this._accessors ) {
this._buffer.set( arguments[ i ], idx );
} else {
this._buffer[ idx ] = arguments[ i ];
}
return this;
}
// EXPORTS //
module.exports = set;
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