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