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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 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 3x 3x 19x 22x 9x 9x 22x 9x 9x 9x 9x 9x 9x 9x 316x 316x 316x 316x 20x 20x 20x 20x 1040x 1040x 1040x 20x 316x 296x 296x 296x 296x 296x 5174x 5174x 280x 280x 280x 4894x 4894x 4894x 296x 296x 296x 316x 9x 9x 10x 10x 10x 10x 10x 10x 22x 320x 320x 320x 320x 27x 27x 27x 27x 1866x 1866x 1866x 27x 320x 293x 293x 293x 293x 293x 5626x 5626x 278x 278x 278x 5348x 5348x 5348x 293x 293x 293x 320x 10x 22x 2x 2x 2x 2x 2x | /** * @license Apache-2.0 * * Copyright (c) 2020 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 isNegativeZerof = require( '@stdlib/math/base/assert/is-negative-zerof' ); var isnanf = require( '@stdlib/math/base/assert/is-nanf' ); // MAIN // /** * Sorts a single-precision floating-point strided array using insertion sort. * * @param {PositiveInteger} N - number of indexed elements * @param {number} order - sort order * @param {Float32Array} x - input array * @param {integer} stride - index increment * @returns {Float32Array} input array * * @example * var Float32Array = require( '@stdlib/array/float32' ); * * var x = new Float32Array( [ 1.0, -2.0, 3.0, -4.0 ] ); * * ssortins( x.length, 1.0, x, 1 ); * // x => <Float32Array>[ -4.0, -2.0, 1.0, 3.0 ] */ function ssortins( N, order, x, stride ) { var flg; var ix; var jx; var fx; var lx; var v; var u; var i; if ( N <= 0 || order === 0.0 ) { return x; } // For a positive stride, sorting in decreasing order is equivalent to providing a negative stride and sorting in increasing order, and, for a negative stride, sorting in decreasing order is equivalent to providing a positive stride and sorting in increasing order... if ( order < 0.0 ) { stride *= -1; } if ( stride < 0 ) { // Traverse the strided array from right-to-left... fx = (1-N) * stride; // first index lx = 0; // last index ix = fx + stride; // Sort in increasing order... for ( i = 1; i < N; i++ ) { v = x[ ix ]; // Sort `NaN` values to the end (i.e., the left)... if ( isnanf( v ) ) { jx = ix; // Shift all values (including NaNs) to the left of the current element to the right... while ( jx > lx ) { x[ jx ] = x[ jx+stride ]; jx += stride; } x[ lx ] = v; } else { flg = isNegativeZerof( v ); jx = ix - stride; // Shift all larger values to the right of the current element to the left... while ( jx <= fx ) { u = x[ jx ]; if ( u <= v && !(flg && u === v && isNegativeZerof( u ) === false) ) { // eslint-disable-line max-len // Note: positive zeros (and NaNs (e.g., when last element is NaN)) are sorted to the left break; } x[ jx+stride ] = u; jx -= stride; } x[ jx+stride ] = v; ix += stride; } } return x; } // Traverse the strided array from left-to-right... fx = 0; // first index lx = (N-1) * stride; // last index ix = fx + stride; // Sort in increasing order... for ( i = 1; i < N; i++ ) { v = x[ ix ]; // Sort `NaN` values to the end... if ( isnanf( v ) ) { jx = ix; // Shift all values (including NaNs) to the right of the current element to the left... while ( jx < lx ) { x[ jx ] = x[ jx+stride ]; jx += stride; } x[ lx ] = v; } else { flg = isNegativeZerof( v ); jx = ix - stride; // Shift all larger values to the left of the current element to the right... while ( jx >= fx ) { u = x[ jx ]; if ( u <= v && !(flg && u === v && isNegativeZerof( u ) === false) ) { // eslint-disable-line max-len // Note: positive zeros (and NaNs (e.g., when first element is NaN)) are sorted to the right break; } x[ jx+stride ] = u; jx -= stride; } x[ jx+stride ] = v; ix += stride; } } return x; } // EXPORTS // module.exports = ssortins; |