ft_strmapi.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strmapi.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: yeonhkim <yeonhkim@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/07/21 18:53:35 by yeonhkim          #+#    #+#             */
/*   Updated: 2022/07/21 21:34:48 by yeonhkim         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

char	*ft_strmapi(char const *s, char (*f)(unsigned int, char))
{
	char	*dst;
	size_t	len;
	size_t	i;

	if (!f || !s)
		return (NULL);
	len = 0;
	while (s[len])
		len++;
	dst = malloc(sizeof(char) * (len + 1));
	if (!dst)
		return (NULL);
	i = 0;
	while (s[i])
	{
		dst[i] = f(i, s[i]);
		i++;
	}
	dst[i] = '\0';
	return (dst);
}
/*
char test_f(unsigned int idx, char c)
{
	idx = 0;
	return (c + 1);
}

#include <stdio.h>
int main()
{
	printf("%s\n", ft_strmapi("abcd", test_f));
}*/