ft_strjoin.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strjoin.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: cado-car <cado-car@student.42sp.org.br>    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/07/31 11:45:46 by cado-car          #+#    #+#             */
/*   Updated: 2021/07/31 22:23:34 by cado-car         ###   ########lyon.fr   */
/*                                                                            */
/* ************************************************************************** */

/*
*	DESCRIPTION
*	Allocates (with malloc(3)) and returns a new string, which is the result of 
*	the concatenation of ’s1’ and ’s2’.
*	PARAMETERS
*	#1. The prefix string.
*	#2. The suffix string.
*	RETURN VALUES
*	The new string. NULL if the allocation fails.
*/

#include "libft.h"

char	*ft_strjoin(char const *s1, char const *s2)
{
	char	*ccat;
	int		len_s1;
	int		len_s2;

	if (!s1 || !s2)
		return (NULL);
	len_s1 = (ft_strlen((char *)s1));
	len_s2 = (ft_strlen((char *)s2));
	ccat = (char *)malloc((len_s1 + len_s2 + 1) * sizeof(char));
	if (ccat == NULL)
		return (NULL);
	ft_strlcpy(&ccat[0], s1, len_s1 + 1);
	ft_strlcpy(&ccat[len_s1], s2, len_s2 + 1);
	return (ccat);
}