example.c

/*
Copyright (c) 2015, Sky Leonard
All rights reserved.
For more info see COPYING or http://opensource.org/licenses/BSD-3-Clause
 */

#include <stdlib.h>
#include <time.h>

#include "partial.h"

#define NARRAYELEMENTS 24

static int array[NARRAYELEMENTS];

static void shuffle(){
    int i;
    int t;
    size_t j;

    for (i = 0; i < NARRAYELEMENTS - 1; ++i){
        j = i + rand() / (RAND_MAX / (NARRAYELEMENTS - i) + 1);
        t = array[j];
        array[j] = array[i];
        array[i] = t;
    }
}

static void printarray(){
    int i;

    for (i = 0; i < NARRAYELEMENTS; ++i){
        printf("%d ", array[i]);
    }
    puts("\n");
}

static int compar(int ud, int * a, int * b){
    if (*a <  *b)
        return -ud;
    else if (*a >  *b)
        return ud;
    else
        return 0;
}

int main(){
    int i, res;

    srand(time(NULL));
    for (i = 0; i < NARRAYELEMENTS; ++i){
        array[i] = i;
    }

    shuffle();
    printarray();

    res = partial_quick(
            NULL,                               // return value (void)
            "v pTT*", &qsort,                   // lib func
            "i ipp", &compar, 1,                // our func
            array, NARRAYELEMENTS, sizeof(int), // qsort args
            1);                                 // compar args
    if (res != 0){
        return 1;
    }

    printarray();
    shuffle();
    printarray();

    res = partial_quick(
            NULL,                               // return value (void)
            "v pTT*", &qsort,                   // lib func
            "i ipp", &compar, 1,                // our func
            array, NARRAYELEMENTS, sizeof(int), // qsort args
            -1);                                // compar args
    if (res != 0){
        return 2;
    }

    printarray();

    return 0;
}