logistic-bot/libft
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

ft_memcpy: do not try to copy to or from null

Browse source
This commit is contained in:
Khaïs COLIN 2024-10-22 12:10:08 +02:00
parent 1d5123bd4a
commit 34a548bd78
1 changed files with 41 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

42
ft_memcpy.c
View file

@ -6,16 +6,19 @@
/* By: kcolin <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/10/15 13:38:05 by kcolin #+# #+# */
/* Updated: 2024/10/16 15:18:36 by kcolin ### ########.fr */
/* Updated: 2024/10/22 12:03:47 by kcolin ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
#include <stdlib.h>
void *ft_memcpy(void *dest, const void *src, size_t n)
{
size_t i;
if ((dest == NULL || src == NULL) && n > 0)
return (dest);
i = 0;
while (i < n)
{
@ -24,3 +27,40 @@ void *ft_memcpy(void *dest, const void *src, size_t n)
}
return (dest);
}
/*
#include <string.h>
#include <stdio.h>
#include "libft.h"
int main(void)
{
char dest[20] = "AAAAAAAAAAAAAAAAAAA";
char src[20] = "Hello there";
int i;
printf("%p\n", ft_memcpy(dest, src, 0));
i = 0;
while (i < 20)
{
printf("%d\t%c\n", dest[i], dest[i]);
i++;
}
printf("%p\n", ft_memcpy(dest, src, 15));
i = 0;
while (i < 20)
{
printf("%d\t%c\n", dest[i], dest[i]);
i++;
}
printf("%p\n", memcpy(dest, src, 15));
i = 0;
while (i < 20)
{
printf("%d\t%c\n", dest[i], dest[i]);
i++;
}
printf("\n");
printf("%p\n", ft_memcpy(NULL, NULL, 15));
}
*/