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#include <stdlib.h>
#include <string.h>
struct __qs {
char *base;
size_t size;
int (*compar)(const void *, const void *);
char buf[64];
char *swap;
};
static void __swap(struct __qs *a, size_t i, size_t j)
{
memcpy(a->swap, a->base + (a->size * i), a->size);
memcpy(a->base + (a->size * i), a->base + (a->size * j), a->size);
memcpy(a->base + (a->size * j), a->swap, a->size);
}
static size_t __partition(struct __qs *a, size_t lo, size_t hi)
{
size_t i = lo, j = 0;
for (j = lo; j < hi; j++) {
if (a->compar(a->base + (a->size * j), a->base + (a->size * hi)) < 0) {
__swap(a, i, j);
i++;
}
}
__swap(a, i, hi);
return i;
}
static void __qsort(struct __qs *a, size_t lo, size_t hi)
{
if (lo < hi) {
size_t p = __partition(a, lo, hi);
__qsort(a, lo, p - 1);
__qsort(a, p + 1, hi);
}
}
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