Subversion Repositories HelenOS-historic

Rev

Rev 331 | Rev 335 | Go to most recent revision | Show entire file | Regard whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 331 Rev 333
Line -... Line 1...
- 
 
 1 
/*
- 
 
 2 
 * Copyright (C) 2005 Sergey Bondari
- 
 
 3 
 * All rights reserved.
- 
 
 4 
 *
- 
 
 5 
 * Redistribution and use in source and binary forms, with or without
- 
 
 6 
 * modification, are permitted provided that the following conditions
- 
 
 7 
 * are met:
- 
 
 8 
 *
- 
 
 9 
 * - Redistributions of source code must retain the above copyright
- 
 
 10 
 *   notice, this list of conditions and the following disclaimer.
- 
 
 11 
 * - Redistributions in binary form must reproduce the above copyright
- 
 
 12 
 *   notice, this list of conditions and the following disclaimer in the
- 
 
 13 
 *   documentation and/or other materials provided with the distribution.
- 
 
 14 
 * - The name of the author may not be used to endorse or promote products
- 
 
 15 
 *   derived from this software without specific prior written permission.
- 
 
 16 
 *
- 
 
 17 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- 
 
 18 
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- 
 
 19 
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- 
 
 20 
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- 
 
 21 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- 
 
 22 
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- 
 
 23 
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- 
 
 24 
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- 
 
 25 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- 
 
 26 
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- 
 
 27 
 */
- 
 
 28 
 
1 
#include <mm/heap.h>
 29 
#include <mm/heap.h>
2 
#include <memstr.h>
 30 
#include <memstr.h>
3 
#include <sort.h>
 31 
#include <sort.h>
4 
 
 32 
 
5 
 
 33 
 
6 
void qsort(void * data, count_t n, size_t e_size, int (* cmp) (void * a, void * b)) {
 34 
void qsort(void * data, count_t n, size_t e_size, int (* cmp) (void * a, void * b)) {
7 
 
 - 
 
8 
    if (n > 4) {
 35 
    if (n > 4) {
9 
        int i = 0, j = n - 1;
 36 
        int i = 0, j = n - 1;
10 
        void * tmp = (void *) malloc(e_size);
 37 
        void * tmp = (void *) malloc(e_size);
11 
        void * pivot = (void *) malloc(e_size);
 38 
        void * pivot = (void *) malloc(e_size);
12 
 
 39 
 
13 
        memcpy(pivot, data, e_size);
 40 
        memcpy(pivot, data, e_size);
14 
 
 41 
 
15 
        while (1) {
 42 
        while (1) {
16 
            while ((cmp(data + i * e_size, pivot) < 0) && i < n) i++;
 43 
            while ((cmp(data + i * e_size, pivot) < 0) && i < n) i++;
17 
            while ((cmp(data + j * e_size, pivot) >=0) && j > 0) j--;
 44 
            while ((cmp(data + j * e_size, pivot) >=0) && j > 0) j--;
18 
 
 - 
 
19 
            if (i<j) {
 45 
            if (i<j) {
20 
                memcpy(tmp, data + i * e_size, e_size);
 46 
                memcpy(tmp, data + i * e_size, e_size);
21 
                memcpy(data + i * e_size, data + j * e_size, e_size);
 47 
                memcpy(data + i * e_size, data + j * e_size, e_size);
22 
                memcpy(data + j * e_size, tmp, e_size);
 48 
                memcpy(data + j * e_size, tmp, e_size);
23 
            } else {
 49 
            } else {
Line 28... Line 54...
28 
        free(tmp);
 54 
        free(tmp);
29 
        free(pivot);
 55 
        free(pivot);
30 
 
 56 
 
31 
        qsort(data, j + 1, e_size, cmp);
 57 
        qsort(data, j + 1, e_size, cmp);
32 
        qsort(data + (j + 1) * e_size, n - j - 1, e_size, cmp);
 58 
        qsort(data + (j + 1) * e_size, n - j - 1, e_size, cmp);
33 
 
 - 
 
34 
    } else {
 59 
    } else {
35 
        bubblesort(data, n, e_size, cmp);
 60 
        bubblesort(data, n, e_size, cmp);
36 
    }
 61 
    }
37 
 
 - 
 
38 
 
 - 
 
39 
}
 62 
}
40 
 
 63 
 
41 
 
 64 
 
42 
void bubblesort(void * data, count_t n, size_t e_size, int (* cmp) (void * a, void * b)) {
 65 
void bubblesort(void * data, count_t n, size_t e_size, int (* cmp) (void * a, void * b)) {
43 
    bool done = false;
 66 
    bool done = false;
Line 52... Line 75...
52 
                memcpy(p, p + e_size, e_size);
 75 
                memcpy(p, p + e_size, e_size);
53 
                memcpy(p + e_size, slot, e_size);
 76 
                memcpy(p + e_size, slot, e_size);
54 
                done = false;
 77 
                done = false;
55 
            }
 78 
            }
56 
        }
 79 
        }
57 
 
 - 
 
58 
    }
 80 
    }
59 
 
 81 
   
60 
    free(slot);
 82 
    free(slot);
61 
}
 83 
}
62 
 
 84