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 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 17x 17x 17x 17x 17x 17x 17x 17x 34x 3x 3x 34x 13x 13x 34x 14x 17x 1x 1x 1x 1x 1x | /**
* @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';
// MAIN //
/**
* Computes the minimum linear index in an underlying data buffer accessible to an array view.
*
* @param {NonNegativeIntegerArray} shape - array shape
* @param {IntegerArray} strides - stride array
* @param {NonNegativeInteger} offset - index offset
* @returns {NonNegativeInteger} linear index
*
* @example
* var shape = [ 10, 10 ];
* var strides = [ 10, 1 ];
* var offset = 10;
*
* var idx = minViewBufferIndex( shape, strides, offset );
* // returns 10
*
* @example
* var shape = [ 10, 10 ];
* var strides = [ -10, -1 ];
* var offset = 109;
*
* var idx = minViewBufferIndex( shape, strides, offset );
* // returns 10
*
* @example
* var shape = [ 10, 10 ];
* var strides = [ 1, 10 ];
* var offset = 10;
*
* var idx = minViewBufferIndex( shape, strides, offset );
* // returns 10
*
* @example
* var shape = [ 10, 10 ];
* var strides = [ -1, -10 ];
* var offset = 109;
*
* var idx = minViewBufferIndex( shape, strides, offset );
* // returns 10
*/
function minViewBufferIndex( shape, strides, offset ) {
var ndims;
var idx;
var i;
ndims = shape.length;
idx = offset;
for ( i = 0; i < ndims; i++ ) {
if ( shape[ i ] === 0 ) {
return offset;
}
if ( strides[ i ] < 0 ) {
idx += strides[ i ] * ( shape[ i ] - 1 ); // decrements the index
}
}
return idx;
}
// EXPORTS //
module.exports = minViewBufferIndex;
|