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

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/* ************************************************************************** */
/*                                                                            */
/*                                                        ::::::::            */
/*   ft_strjoin.c                                       :+:    :+:            */
/*                                                     +:+                    */
/*   By: nsterk <marvin@codam.nl>                     +#+                     */
/*                                                   +#+                      */
/*   Created: 2020/09/22 15:39:01 by nsterk        #+#    #+#                 */
/*   Updated: 2021/03/03 01:42:08 by nsterk        ########   odam.nl         */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

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