ft_strmapi.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strmapi.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: adiaz-lo <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/01/13 11:42:22 by adiaz-lo          #+#    #+#             */
/*   Updated: 2020/01/13 11:56:40 by adiaz-lo         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

/*
** This function applies the function 'f()' to each character of the string
** ('s') passed as argument to create a new string resulting from successive
** applications of 'f()'.
*/

#include "libft.h"

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

	if (!s || !f)
		return (NULL);
	if (!(str = malloc(sizeof(char) * (ft_strlen(s) + 1))))
		return (0);
	i = 0;
	while (s[i])
	{
		str[i] = f(i, s[i]);
		i++;
	}
	str[i] = 0;
	return (str);
}