tor-android/external/badvpn_dns/misc/bsort.h

70 lines
2.5 KiB
C

/**
* @file bsort.h
* @author Ambroz Bizjak <ambrop7@gmail.com>
*
* @section LICENSE
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* @section DESCRIPTION
*
* Sorting functions.
*/
#ifndef BADVPN_MISC_BSORT_H
#define BADVPN_MISC_BSORT_H
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include <misc/debug.h>
#include <misc/balloc.h>
typedef int (*BSort_comparator) (const void *e1, const void *e2);
static void BInsertionSort (void *arr, size_t count, size_t esize, BSort_comparator compatator, void *temp);
void BInsertionSort (void *arr, size_t count, size_t esize, BSort_comparator compatator, void *temp)
{
ASSERT(esize > 0)
for (size_t i = 0; i < count; i++) {
size_t j = i;
while (j > 0) {
uint8_t *x = (uint8_t *)arr + (j - 1) * esize;
uint8_t *y = (uint8_t *)arr + j * esize;
int c = compatator(x, y);
if (c <= 0) {
break;
}
memcpy(temp, x, esize);
memcpy(x, y, esize);
memcpy(y, temp, esize);
j--;
}
}
}
#endif