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#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "generators.h"
#include "sorters.h"
#define MIN_SIZE 10000
#define MAX_SIZE 10000000
static int buffer[MAX_SIZE];
static unsigned long comparisons;
static int compare(const void *a, const void *b)
{
const int *aa = a;
const int *bb = b;
comparisons++;
if (*aa < *bb)
return -1;
else if (*aa > *bb)
return 1;
else
return 0;
}
#define CMP_WIDTH 12
#define MS_WIDTH 6
#define SORT_WIDTH 10
#define GEN_WIDTH (CMP_WIDTH + MS_WIDTH + 1)
#define SIZE_WIDTH 10
static inline unsigned long timediff_ms(struct timespec *start, struct timespec *stop)
{
return 1000 * (stop->tv_sec - start->tv_sec) + (stop->tv_nsec - start->tv_nsec) / 1000000;
}
int main()
{
struct timespec start, stop;
printf("%-*s ", SORT_WIDTH, "");
for (const struct generator *g = generators; g->name; g++)
printf("%*s ", GEN_WIDTH, g->name);
printf(" %*s\n%-*s ", SIZE_WIDTH, "elements", SORT_WIDTH, "");
for (const struct generator *g = generators; g->name; g++)
printf("%*s %*s ", CMP_WIDTH, "compares", MS_WIDTH, "ms");
puts("");
for (const struct sorter *s = sorters; s->name; s++) {
for (size_t size = MAX_SIZE; size >= MIN_SIZE; size /= 10) {
printf("%-*s ", SORT_WIDTH, size == MAX_SIZE ? s->name : "");
for (const struct generator *g = generators; g->name; g++) {
comparisons = 0;
g->func(buffer, size);
if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &start)) abort();
s->func(buffer, size, sizeof(int), compare);
if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &stop)) abort();
printf("%*lu %*lu ", CMP_WIDTH, comparisons, MS_WIDTH, timediff_ms(&start, &stop));
}
printf(" %*zu\n", SIZE_WIDTH, size);
}
puts("");
}
return 0;
}
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