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sierpinski.c
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sierpinski.c
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#include "libft.h"
#include <stdio.h>
#include <unistd.h>
static char **cut_area(char **area, int mode, int size)
{
char **part;
int i;
part = malloc(size/2 * sizeof(part));
/* upper left */
if (mode == 1)
{
i = -1;
while (++i < size/2)
*(part + i) = *(area + i);
}
/* upper right */
else if (mode == 2)
{
i = -1;
while (++i < size/2)
*(part + i) = *(area + i) + size/2;
}
/* lower right */
else
{
i = size/2;
while (i < size)
{
*(part + i - size/2) = *(area + i) + size/2;
i++;
}
}
return (part);
}
static void sierpinski(char **area, int size, int freecnt)
{
if (size == 1)
**area = 'x';
else
{
sierpinski(cut_area(area, 1, size), size/2, freecnt+1);
sierpinski(cut_area(area, 2, size), size/2, freecnt+1);
sierpinski(cut_area(area, 3, size), size/2, freecnt+1);
}
if (freecnt)
free(area);
}
int main(int argc, char **argv)
{
size_t size;
size_t i;
size_t j;
char **area;
if (argc != 2)
{
printf("Specify gasket size\n");
return (0);
}
size = atoi(argv[1]);
if (size < 0 || !(ft_is_powof2(size)))
{
printf("The size has to be power of 2\n");
return (0);
}
/* allocate for area */
area = malloc(size * sizeof(area));
i = 0;
while (i < size)
{
area[i] = ft_strnew(size);
ft_bchar(area[i], '.', size);
i++;
}
/* print original area */
i = 0;
while (i < size)
{
j = 0;
while (j < size)
{
write(1, &area[i][j], 1);
write(1, " ", 1);
j++;
}
write(1, "\n", 1);
i++;
}
/* print addresses */
/* printf("addr of head %p\n", &area);
i = 0;
while (i < size)
{
printf("ptr%zu %p\n", i, area + i);
j = 0;
while (j < size)
{
printf(" str%zu, char%zu=%c %p\n", i, j, *(*(area + i) + j), *(area + i) + j);
j++;
}
i++;
}
*/
printf("\n");
sierpinski(area, size, 0);
/* print modified area */
i = 0;
while (i < size)
{
j = 0;
while (j < size)
{
write(1, &area[i][j], 1);
write(1, " ", 1);
j++;
}
write(1, "\n", 1);
i++;
}
/* free memory */
i = 0;
while (i < size)
{
free(area[i]);
i++;
}
free(area);
}