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/* -*- 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);
}
}
void quicksort_index1(std::vector<int> & p, std::vector<int> & index, int left, int right)
{
if (left < right) {
int i = left;
int j = right + 1;
int pivot = p[left];
do {
do
i++;
while ((p[i] < pivot) && (i < right));
do
j--;
while ((p[j] > pivot) && (j > left));
if (i < j) {
SWAP <int> (p[i],p[j]);
SWAP <int> (index[i],index[j]);
}
} while (i < j);
SWAP <int> (p[left], p[j]);
SWAP <int> (index[left], index[j]);
quicksort_index1 (p,index, left, j-1);
quicksort_index1 (p,index, j+1, right);
}
}
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