libft/ft_strmapi.c at master · ella578/libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strmapi.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: ewang <marvin@42.fr>                       +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/11/24 15:01:10 by ewang             #+#    #+#             */
/*   Updated: 2022/11/24 15:48:52 by ewang            ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
#include "libft.h"

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

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