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ft_strmapi.c
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ft_strmapi.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_strmapi.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: akyoshid <akyoshid@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2023/11/21 19:09:51 by akyoshid #+# #+# */
/* Updated: 2023/12/03 19:44:34 by akyoshid ### ########.fr */
/* */
/* ************************************************************************** */
// === DESCRIPTION ===
// Creates a new string by repeatedly applying 'f' to each character of 's'.
// The function 'f' takes the index of the string 's' as its first argument
// and uses it for manipulating characters.
// === RETURN VALUE ===
// if (s == NULL || f == NULL) → Return NULL.
// === MAPPING ===
// Mapping means the process of associating two things.
#include "libft.h"
char *ft_strmapi(char const *s, char (*f)(unsigned int, char))
{
char *buff;
unsigned int i;
if (s == NULL || f == NULL)
return (NULL);
buff = malloc((ft_strlen(s) + 1) * sizeof(char));
if (buff == NULL)
return (NULL);
i = 0;
while (s[i] != '\0')
{
buff[i] = (*f)(i, s[i]);
i++;
}
buff[i] = '\0';
return (buff);
}
// char ft_addindex(unsigned int i, char c)
// {
// return ((char)i + c);
// }
// int main(void)
// {
// char str[] = "00000";
// // char *str = NULL;
// char *ptr;
// ptr = ft_strmapi(str, ft_addindex);
// printf("Before ft_strmapi: %s\n", str);
// printf("After ft_strmapi: %s\n", ptr);
// free(ptr);
// return (0);
// }