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ft_lstmap.c
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ft_lstmap.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_lstmap.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: jschott <jschott@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2023/05/24 14:36:55 by jschott #+# #+# */
/* Updated: 2024/08/08 10:29:43 by jschott ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
/**
* Applies a function to the content of each element of a list, creating a new list.
*
* @param lst The original list to map over.
* @param f The function to apply to each element's content.
* @param del The function to delete the content of an element if needed.
* @return A new list with each element's content being the result of applying `f` to the original
* element's content, or NULL if an error occurs.
*/
t_list *ft_lstmap(t_list *lst, void *(*f)(void *), void (*del)(void *))
{
t_list *newlst;
t_list *newlstel;
if (!f || !lst || !del)
return (NULL);
newlstel = ft_lstnew(f(lst->content));
if (!newlstel)
{
del(newlstel->content);
return (NULL);
}
newlst = newlstel;
lst = lst->next;
while (lst)
{
newlstel = ft_lstnew(f(lst->content));
if (!newlstel)
{
ft_lstclear(&newlst, del);
return (NULL);
}
ft_lstadd_back(&newlst, newlstel);
lst = lst->next;
}
return (newlst);
}