thrieg/ft_malloc
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Thomas Rieg 2025-11-28 19:50:58 +01:00
commit 42653de246
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libft/ft_memmove.c Executable file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_memmove.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: thrieg <thrieg@student.42mulhouse.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/10/14 16:00:16 by thrieg #+# #+# */
/* Updated: 2025/02/16 19:04:08 by thrieg ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
static void *ft_optimised_revcpy(void *dest, const void *src, size_t n)
{
char *str;
unsigned long long *str_packed;
char *str_src;
unsigned long long *str_src_packed;
str = (char *)dest;
str_src = (char *)src;
while (n % sizeof(unsigned long long))
{
n--;
str[n] = str_src[n];
}
n /= sizeof(unsigned long long);
str_packed = (unsigned long long *)dest;
str_src_packed = (unsigned long long *)src;
while (n > 0)
{
n--;
str_packed[n] = str_src_packed[n];
}
return (dest);
}
void *ft_memmove(void *dest, const void *src, size_t n)
{
char *str;
const char *str_src;
if (!dest && !src)
return (NULL);
str = (char *)dest;
str_src = (const char *)src;
if (str > str_src)
{
if ((str + sizeof(unsigned long long)) > str_src)
return (ft_optimised_revcpy(dest, src, n));
while (n-- > 0)
str[n] = str_src[n];
}
else
{
ft_memcpy(dest, src, n);
}
return (dest);
}