47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
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/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_memmove.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: kcolin <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2024/10/15 13:57:12 by kcolin #+# #+# */
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/* Updated: 2024/10/15 14:12:15 by kcolin ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "libft.h"
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/*
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* case 1: dst overlaps at start of src.
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* src is before dst.
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* copy back to front
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*
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* case 2: dst overlaps at beginning of src.
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* src is after dst.
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* copy front to back.
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*
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* case 3: dst and src do not overlap
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* it doesn't matter how the data is copied
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* merge with case 2
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*/
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void *ft_memmove(void *dst, const void *src, t_size len)
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{
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t_size i;
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if (dst >= src && dst <= (src + len))
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{
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i = len;
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while (i > 0)
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{
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i--;
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((char *)dst)[i] = ((char *)src)[i];
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}
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}
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else
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{
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ft_memcpy(dst, src, len);
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}
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return (dst);
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}
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