#include "libft.h"
#include <stdlib.h>
#include <string.h>

void *ft_realloc(void *ptr, size_t old_size, size_t new_size)
{
    if (new_size == 0) {
        free(ptr);
        return (NULL);
    }
    if (!ptr)
        return (malloc(new_size));

    void *new_ptr = malloc(new_size);
    if (!new_ptr)
        return (NULL);

    size_t copy_size = old_size < new_size ? old_size : new_size;
    ft_memcpy(new_ptr, ptr, copy_size);
    free(ptr);
    return (new_ptr);
}