H3XploR
65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_realloc.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: yantoine <yantoine@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2025/02/25 17:58:34 by yantoine #+# #+# */
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/* Updated: 2025/02/25 18:06:12 by yantoine ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "miniRT.h"
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static void *allocate_memory(size_t new_size)
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{
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void *new_ptr;
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new_ptr = malloc(new_size);
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if (!new_ptr)
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return (NULL);
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return (new_ptr);
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}
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static void copy_memory(void *dst, void *src, size_t size)
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{
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size_t i;
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i = 0;
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while (i < size)
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{
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((char *)dst)[i] = ((char *)src)[i];
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i++;
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}
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}
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static size_t get_copy_size(size_t old_size, size_t new_size)
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{
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if (old_size < new_size)
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return (old_size);
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return (new_size);
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}
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void *ft_realloc(void *ptr, size_t old_size, size_t new_size)
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{
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void *new_ptr;
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size_t copy_size;
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if (new_size == 0)
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{
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free(ptr);
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return (NULL);
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}
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new_ptr = allocate_memory(new_size);
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if (!new_ptr)
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return (NULL);
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if (ptr)
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{
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copy_size = get_copy_size(old_size, new_size);
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copy_memory(new_ptr, ptr, copy_size);
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free(ptr);
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}
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return (new_ptr);
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}
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