Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 | 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 6x 6x 3x 3x 3x 3x 3x | /**
* @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 floor = require( '@stdlib/math/base/special/floor' );
// MAIN //
/**
* Reverses a strided array in-place according to a mask using alternative accessors.
*
* @private
* @param {PositiveInteger} N - number of indexed elements
* @param {Object} x - input array object
* @param {integer} strideX - stride length for `x`
* @param {NonNegativeInteger} offsetX - starting index for `x`
* @param {Object} mask - mask array object
* @param {integer} strideMask - stride length for `mask`
* @param {NonNegativeInteger} offsetMask - starting index for `mask`
* @returns {Object} input array object
*
* @example
* var toAccessorArray = require( '@stdlib/array/base/to-accessor-array' );
* var arraylike2object = require( '@stdlib/array/base/arraylike2object' );
*
* var x = toAccessorArray( [ -2.0, 1.0, 3.0, -5.0, 4.0, 0.0, -1.0, -3.0 ] );
* var mask = toAccessorArray( [ 0, 0, 0, 1, 0, 0, 0, 0 ] );
*
* gmskrev( 8, arraylike2object( x ), 1, 0, arraylike2object( mask ), 1, 0 );
*/
function gmskrev( N, x, strideX, offsetX, mask, strideMask, offsetMask ) {
var xbuf;
var mbuf;
var mget;
var xget;
var xset;
var tmp;
var ix;
var iy;
var im;
var jm;
var n;
var i;
xbuf = x.data;
xget = x.accessors[ 0 ];
xset = x.accessors[ 1 ];
mbuf = mask.data;
mget = mask.accessors[ 0 ];
n = floor( N/2 );
ix = offsetX;
iy = ix + ( ( N - 1 ) * strideX );
im = offsetMask;
jm = im + ( ( N - 1 ) * strideMask );
for ( i = 0; i < n; i++ ) {
if ( mget( mbuf, im ) === 0 && mget( mbuf, jm ) === 0 ) {
tmp = xget( xbuf, ix );
xset( xbuf, ix, xget( xbuf, iy ) );
xset( xbuf, iy, tmp );
}
ix += strideX;
iy -= strideX;
im += strideMask;
jm -= strideMask;
}
return x;
}
// EXPORTS //
module.exports = gmskrev;
|