ft_strjoin.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strjoin.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: nvillalt <nvillalt@student.42madrid>       +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/10/05 15:07:13 by nvillalt          #+#    #+#             */
/*   Updated: 2023/10/06 13:21:08 by nvillalt         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

static char	*join_str(char *join, char const *s1, char const *s2)
{
	int	i;
	int	j;

	i = 0;
	j = 0;
	while (s1[i] != '\0')
	{
		join[i] = s1[i];
		i++;
	}
	while (s2[j] != '\0')
	{
		join[i] = s2[j];
		j++;
		i++;
	}
	join[i] = '\0';
	return (join);
}

char	*ft_strjoin(char const *s1, char const *s2)
{
	size_t	len;
	char	*join;

	if (*s1 == '\0' && *s2 == '\0')
		return (ft_strdup(""));
	len = ft_strlen(s1) + ft_strlen(s2) + 1;
	join = (char *)malloc(sizeof(char) * len);
	if (!join)
		return (0);
	join = join_str(join, s1, s2);
	return (join);
}