ft_strjoin.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strjoin.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: yshimoda <yshimoda@student.42tokyo.jp>     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/07/06 11:14:10 by yshimoda          #+#    #+#             */
/*   Updated: 2022/10/24 10:48:19 by yshimoda         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"
#include <stdlib.h>

char	*ft_strjoin(char const *s1, char const *s2)
{
	char	*ptr;
	char	*save;

	if (!s1 || !s2)
		return (NULL);
	ptr = (char *)malloc(ft_strlen(s1) + ft_strlen(s2) + 1);
	if (!ptr)
		return (NULL);
	save = ptr;
	while (*s1)
		*ptr++ = *s1++;
	while (*s2)
		*ptr++ = *s2++;
	*ptr = 0;
	return (save);
}