da7e/42-libft
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

memcpy and memmove fix

Browse Source
This commit is contained in:
David Gailleton
2025-11-09 20:16:25 +01:00
parent 5f425ed21d
commit aa24497045
2 changed files with 21 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
ft_memcpy.c
View File

@@ -6,7 +6,7 @@
/* By: dgaillet <dgaillet@student.42.fr> +#+ +:+ +#+ */ /* By: dgaillet <dgaillet@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */ /* +#+#+#+#+#+ +#+ */
/* Created: 2025/11/05 11:46:16 by dgaillet #+# #+# */ /* Created: 2025/11/05 11:46:16 by dgaillet #+# #+# */
/* Updated: 2025/11/05 17:02:06 by dgaillet ### ########lyon.fr */ /* Updated: 2025/11/09 20:00:45 by dgaillet ### ########lyon.fr */
/* */ /* */
/* ************************************************************************** */ /* ************************************************************************** */
@@ -14,9 +14,15 @@
void *ft_memcpy(void *dest, const void *src, size_t n) void *ft_memcpy(void *dest, const void *src, size_t n)
{ {
if (n <= 0) size_t i;
if (!dest && !src)
return (dest); return (dest);
*((unsigned char *) dest) = *((unsigned char *) src); i = 0;
ft_memcpy(dest + 1, src + 1, n - 1); while (i < n)
{
((unsigned char *) dest)[i] = ((unsigned char *) src)[i];
i++;
}
return (dest); return (dest);
} }

21
ft_memmove.c
View File

@@ -6,28 +6,29 @@
/* By: dgaillet <dgaillet@student.42.fr> +#+ +:+ +#+ */ /* By: dgaillet <dgaillet@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */ /* +#+#+#+#+#+ +#+ */
/* Created: 2025/11/05 13:17:42 by dgaillet #+# #+# */ /* Created: 2025/11/05 13:17:42 by dgaillet #+# #+# */
/* Updated: 2025/11/06 12:01:28 by dgaillet ### ########lyon.fr */ /* Updated: 2025/11/09 20:15:29 by dgaillet ### ########lyon.fr */
/* */ /* */
/* ************************************************************************** */ /* ************************************************************************** */
#include "libft.h" #include "libft.h"
void *ft_rev_memcpy(void *dest, const void *src, size_t n) static void *ft_rev_memcpy(void *dest, const void *src, size_t n)
{
if (n <= 0)
{ {
if ((!dest && !src) || n == 0)
return (dest); return (dest);
n--;
while (n > 0)
{
((unsigned char *) dest)[n] = ((unsigned char *) src)[n];
n--;
} }
*((char *) dest) = *((char *) src); ((unsigned char *) dest)[n] = ((unsigned char *) src)[n];
ft_rev_memcpy(dest - 1, src - 1, n - 1);
return (dest); return (dest);
} }
void *ft_memmove(void *dest, const void *src, size_t n) void *ft_memmove(void *dest, const void *src, size_t n)
{ {
if (dest < src) if (dest < src)
ft_memcpy(dest, src, n); return (ft_memcpy(dest, src, n));
else return (ft_rev_memcpy(dest, src, n));
ft_rev_memcpy(dest + (n - 1), src + (n - 1), n);
return (dest);
} }