libft/ft_strjoin.c at main · rubenoid/libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        ::::::::            */
/*   ft_strjoin.c                                       :+:    :+:            */
/*                                                     +:+                    */
/*   By: rvan-sch <[email protected]>         +#+                     */
/*                                                   +#+                      */
/*   Created: 2019/11/22 20:55:45 by rvan-sch      #+#    #+#                 */
/*   Updated: 2019/11/22 20:55:46 by rvan-sch      ########   odam.nl         */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

char	*ft_strjoin(char const *s1, char const *s2)
{
	char	*str;
	size_t	i;
	size_t	len1;
	size_t	len2;

	if (s1 == 0 || s2 == 0)
		return (0);
	len1 = ft_strlen(s1);
	len2 = ft_strlen(s2);
	str = (char *)malloc((len1 + len2) * sizeof(char) + 1);
	if (str == 0)
		return (0);
	i = 0;
	while (i < len1 + len2)
	{
		if (i < len1)
			str[i] = s1[i];
		else
			str[i] = s2[i - len1];
		i++;
	}
	str[i] = '\0';
	return (str);
}