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
|
/* -*- c++ -*- */
/*
* Copyright 2004 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "quicksort_index.h"
template <class T>
void
SWAP
(T & a, T & b)
{
T temp = a;
a = b;
b = temp;
}
template <class T>
void
quicksort_index
(std::vector<T> & p, std::vector<int> & index, int left, int right)
{
if (left < right) {
int i = left;
int j = right + 1;
T pivot = p[left];
do {
do
i++;
while ((p[i] < pivot) && (i < right));
do
j--;
while ((p[j] > pivot) && (j > left));
if (i < j) {
SWAP <T> (p[i],p[j]);
SWAP <int> (index[i],index[j]);
}
} while (i < j);
SWAP <T> (p[left], p[j]);
SWAP <int> (index[left], index[j]);
quicksort_index <T> (p,index, left, j-1);
quicksort_index <T> (p,index, j+1, right);
}
}
// instantiate an <int> version of the quicksort_index
template
void
quicksort_index<int>
(std::vector<int> & p, std::vector<int> & index, int left, int right);
|
