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 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 | 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 13x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 25x 22x 22x 25x 3x 3x 3x 25x 25x 27x 21x 21x 27x 6x 6x 6x 27x 27x 27x 28x 25x 25x 28x 3x 3x 3x 28x 28x 28x 32x 20x 20x 32x 12x 12x 12x 32x 32x 32x 34x 28x 28x 34x 6x 6x 6x 34x 34x 34x 34x 34x 34x 34x 34x 57x 104x 158x 292x 668x 12x 12x 12x 12x 12x 656x 656x 280x 280x 146x 146x 92x 92x 45x 45x 34x 32x 28x 27x 25x 12x 24x 13x 13x 13x 13x 13x | /**
* @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.
*/
/* eslint-disable max-depth */
'use strict';
// MODULES //
var loopOrder = require( '@stdlib/ndarray/base/nullary-loop-interchange-order' );
var blockSize = require( '@stdlib/ndarray/base/nullary-tiling-block-size' );
// MAIN //
/**
* Tests whether at least `n` elements in an ndarray are truthy via loop blocking.
*
* @private
* @param {Object} x - object containing ndarray meta data
* @param {string} x.dtype - data type
* @param {Collection} x.data - data buffer
* @param {NonNegativeIntegerArray} x.shape - dimensions
* @param {IntegerArray} x.strides - stride lengths
* @param {NonNegativeInteger} x.offset - index offset
* @param {string} x.order - specifies whether `x` is row-major (C-style) or column-major (Fortran-style)
* @param {Array<Function>} x.accessors - data buffer accessors
* @param {PositiveInteger} n - number of elements
* @returns {boolean} boolean indicating whether at least `n` elements are truthy
*
* @example
* var toAccessorArray = require( '@stdlib/array/base/to-accessor-array' );
* var accessors = require( '@stdlib/array/base/accessors' );
*
* // Create a data buffer:
* var xbuf = toAccessorArray( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 ] );
*
* // Define the shape of the input array:
* var shape = [ 1, 1, 1, 2, 2 ];
*
* // Define the array strides:
* var sx = [ 4, 4, 4, 2, 1 ];
*
* // Define the index offset:
* var ox = 0;
*
* // Create an input ndarray-like object:
* var x = {
* 'dtype': 'generic',
* 'data': xbuf,
* 'shape': shape,
* 'strides': sx,
* 'offset': ox,
* 'order': 'row-major',
* 'accessors': accessors( xbuf ).accessors
* };
*
* // Test elements:
* var out = blockedsome5d( x, 4 );
* // returns true
*/
function blockedsome5d( x, n ) {
var count;
var bsize;
var xbuf;
var get;
var dx0;
var dx1;
var dx2;
var dx3;
var dx4;
var ox1;
var ox2;
var ox3;
var ox4;
var sh;
var s0;
var s1;
var s2;
var s3;
var s4;
var sx;
var ox;
var ix;
var i0;
var i1;
var i2;
var i3;
var i4;
var j0;
var j1;
var j2;
var j3;
var j4;
var o;
// Note on variable naming convention: s#, dx#, dy#, i#, j# where # corresponds to the loop number, with `0` being the innermost loop...
// Resolve the loop interchange order:
o = loopOrder( x.shape, x.strides );
sh = o.sh;
sx = o.sx;
// Determine the block size:
bsize = blockSize( x.dtype );
// Set a pointer to the first indexed element:
ox = x.offset;
// Cache a reference to the input ndarray buffer:
xbuf = x.data;
// Cache the offset increment for the innermost loop:
dx0 = sx[0];
// Cache accessor:
get = x.accessors[0];
// Initialize a counter:
count = 0;
// Iterate over blocks...
for ( j4 = sh[4]; j4 > 0; ) {
if ( j4 < bsize ) {
s4 = j4;
j4 = 0;
} else {
s4 = bsize;
j4 -= bsize;
}
ox4 = ox + ( j4*sx[4] );
for ( j3 = sh[3]; j3 > 0; ) {
if ( j3 < bsize ) {
s3 = j3;
j3 = 0;
} else {
s3 = bsize;
j3 -= bsize;
}
dx4 = sx[4] - ( s3*sx[3] );
ox3 = ox4 + ( j3*sx[3] );
for ( j2 = sh[2]; j2 > 0; ) {
if ( j2 < bsize ) {
s2 = j2;
j2 = 0;
} else {
s2 = bsize;
j2 -= bsize;
}
dx3 = sx[3] - ( s2*sx[2] );
ox2 = ox3 + ( j2*sx[2] );
for ( j1 = sh[1]; j1 > 0; ) {
if ( j1 < bsize ) {
s1 = j1;
j1 = 0;
} else {
s1 = bsize;
j1 -= bsize;
}
dx2 = sx[2] - ( s1*sx[1] );
ox1 = ox2 + ( j1*sx[1] );
for ( j0 = sh[0]; j0 > 0; ) {
if ( j0 < bsize ) {
s0 = j0;
j0 = 0;
} else {
s0 = bsize;
j0 -= bsize;
}
// Compute the index offset for the first input ndarray element in the current block:
ix = ox1 + ( j0*sx[0] );
// Compute the loop offset increment:
dx1 = sx[1] - ( s0*sx[0] );
// Iterate over the ndarray dimensions...
for ( i4 = 0; i4 < s4; i4++ ) {
for ( i3 = 0; i3 < s3; i3++ ) {
for ( i2 = 0; i2 < s2; i2++ ) {
for ( i1 = 0; i1 < s1; i1++ ) {
for ( i0 = 0; i0 < s0; i0++ ) {
if ( get( xbuf, ix ) ) {
count += 1;
if ( count >= n ) {
return true;
}
}
ix += dx0;
}
ix += dx1;
}
ix += dx2;
}
ix += dx3;
}
ix += dx4;
}
}
}
}
}
}
return false;
}
// EXPORTS //
module.exports = blockedsome5d;
|