ft_strjoin.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strjoin.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: kypark <marvin@42.fr>                      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/11/02 15:55:10 by kypark            #+#    #+#             */
/*   Updated: 2020/11/02 16:19:38 by kypark           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

char				*ft_strjoin(char const *s1, char const *s2)
{
	char			*new_s;
	int				len1;
	int				len2;
	int				i;
	int				j;

	if (!s1 || !s2)
		return (NULL);
	len1 = ft_strlen(s1);
	len2 = ft_strlen(s2);
	if (!(new_s = malloc(sizeof(char) * (len1 + len2 + 1))))
		return (NULL);
	i = 0;
	while (s1[i])
	{
		new_s[i] = s1[i];
		i++;
	}
	j = 0;
	while (s2[j])
		new_s[i++] = s2[j++];
	new_s[i] = '\0';
	return (new_s);
}