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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.
*/
'use strict';
// MODULES //
var isSingleSegmentCompatible = require( '@stdlib/ndarray/base/assert/is-single-segment-compatible' );
var iterationOrder = require( '@stdlib/ndarray/base/iteration-order' );
var isRowMajor = require( '@stdlib/ndarray/base/assert/is-row-major' );
// MAIN //
/**
* Returns a boolean indicating if an array is row-major contiguous.
*
* @param {NonNegativeIntegerArray} shape - array shape
* @param {IntegerArray} strides - stride array
* @param {NonNegativeInteger} offset - index offset
* @returns {boolean} boolean indicating if an array is row-major contiguous
*
* @example
* var shape = [ 2, 2 ];
* var strides = [ 2, 1 ];
* var offset = 0;
*
* var bool = isRowMajorContiguous( shape, strides, offset );
* // returns true
*
* @example
* var shape = [ 2, 2 ];
* var strides = [ -2, 1 ];
* var offset = 2;
*
* var bool = isRowMajorContiguous( shape, strides, offset );
* // returns false
*
* @example
* var shape = [ 2, 2 ];
* var strides = [ 2, 2 ];
* var offset = 0;
*
* var bool = isRowMajorContiguous( shape, strides, offset );
* // returns false
*/
function isRowMajorContiguous( shape, strides, offset ) {
return (
iterationOrder( strides ) !== 0 &&
isRowMajor( strides ) &&
isSingleSegmentCompatible( shape, strides, offset )
);
}
// EXPORTS //
module.exports = isRowMajorContiguous;
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