ft_strmapi.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strmapi.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: mcombeau <mcombeau@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/11/28 04:35:39 by mcombeau          #+#    #+#             */
/*   Updated: 2021/12/02 16:21:12 by mcombeau         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

/*
	DESRIPTION :
	The function ft_strmapi applies the given function f to each character
	in the given string s and allocates sufficient memory to store the
	resulting new string. 

	RETURN VALUE :
	A pointer to the newly created string. NULL if the memory allocation
	fails.	
*/

char	*ft_strmapi(char const *s, char (*f)(unsigned int, char))
{
	char			*str;
	unsigned int	i;

	if (!s || (!s && !f))
		return (ft_strdup(""));
	else if (!f)
		return (ft_strdup(s));
	str = ft_strdup(s);
	if (!str)
		return (NULL);
	i = 0;
	while (s[i])
	{
		str[i] = (*f)(i, s[i]);
		i++;
	}
	return (str);
}