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 | 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 244x 244x 244x 244x 244x 244x 244x 244x 244x 244x 244x 8x 2x 2x 6x 6x 244x 156x 156x 112x 68x 68x 44x 44x 44x 44x 44x 16x 16x 28x 28x 156x 80x 80x 80x 80x 244x 40x 96x 96x 96x 96x 96x 40x 16x 16x 24x 24x 40x 244x 96x 96x 96x 96x 96x 244x 16x 16x 24x 244x 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';
// MODULES //
var isColumnMajor = require( '@stdlib/ndarray/base/assert/is-column-major-string' );
// MAIN //
/**
* Returns an array element located a specified linear view index.
*
* ## Notes
*
* - For zero-dimensional arrays, the input argument is ignored and, for clarity, should not be provided.
*
* @private
* @param {integer} [idx] - linear view index
* @returns {*} array element
*/
function iget( idx ) {
/* eslint-disable no-invalid-this */
var strides;
var shape;
var ndims;
var ind;
var s;
var i;
ndims = this._ndims;
if ( ndims === 0 ) {
if ( this._accessors ) {
return this._buffer.get( this._offset );
}
return this._buffer[ this._offset ];
}
if ( this._flags.ROW_MAJOR_CONTIGUOUS || this._flags.COLUMN_MAJOR_CONTIGUOUS ) { // eslint-disable-line max-len
// Trivial case where we have all positive strides...
if ( this._iterationOrder === 1 ) {
if ( this._accessors ) {
return this._buffer.get( this._offset+idx );
}
return this._buffer[ this._offset+idx ];
}
// Trivial case where we have all negative strides...
if ( this._iterationOrder === -1 ) {
if ( this._accessors ) {
return this._buffer.get( this.offset-idx );
}
return this._buffer[ this._offset-idx ];
}
}
// The approach which follows is to resolve a view index to its subscripts and then plug the subscripts into the standard formula for computing the linear index in the underlying data buffer...
shape = this._shape;
strides = this._strides;
ind = this._offset;
if ( isColumnMajor( this._order ) ) {
for ( i = 0; i < ndims; i++ ) {
s = idx % shape[ i ];
idx -= s;
idx /= shape[ i ];
ind += s * strides[ i ];
}
if ( this._accessors ) {
return this._buffer.get( ind );
}
return this._buffer[ ind ];
}
// Case: row-major
for ( i = ndims-1; i >= 0; i-- ) {
s = idx % shape[ i ];
idx -= s;
idx /= shape[ i ];
ind += s * strides[ i ];
}
if ( this._accessors ) {
return this._buffer.get( ind );
}
return this._buffer[ ind ];
}
// EXPORTS //
module.exports = iget;
|