ft_strjoin.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strjoin.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: khee-seo <khee-seo@student.42seoul.kr>     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/12/24 21:57:39 by khee-seo          #+#    #+#             */
/*   Updated: 2021/01/03 08:07:59 by khee-seo         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

int		s_len(char const *s)
{
	int		len;

	len = 0;
	while (s[len])
		len++;
	return (len);
}

char	*ft_strjoin(char const *s1, char const *s2)
{
	int		i;
	int		j;
	int		len;
	char	*new;

	if (s1 == 0 || s2 == 0)
		return (0);
	len = s_len(s1) + s_len(s2) + 1;
	if (!(new = (char *)malloc(sizeof(char) * len)))
		return (0);
	i = 0;
	while (s1[i])
	{
		new[i] = s1[i];
		i++;
	}
	j = 0;
	while (s2[j])
	{
		new[i] = s2[j];
		i++;
		j++;
	}
	new[i] = '\0';
	return (new);
}