ecole-42/Libft/ft_strjoin.c at main · marplyn/ecole-42 · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strjoin.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: dground <dground@student.42.fr>            +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/10/08 19:53:11 by dground           #+#    #+#             */
/*   Updated: 2021/10/08 20:40:34 by dground          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

static char	*ft_strcat(char *dest, const char *src)
{
	int	i;
	int	j;

	i = 0;
	j = 0;
	while (dest[i] != '\0')
	{
		i++;
	}
	while (src[j] != '\0')
	{
		dest[i + j] = src[j];
		j++;
	}
	dest[i + j] = '\0';
	return (dest);
}

static char	*ft_strcpy(char *dest, const char *scr)
{
	int	i;

	i = 0;
	while (scr[i] != '\0')
	{
		dest[i] = scr[i];
		i++;
	}
	dest[i] = '\0';
	return (dest);
}

char	*ft_strjoin(char const *s1, char const *s2)
{
	char	*str;
	int		length;

	if (s1 == NULL || s2 == NULL)
		return (NULL);
	length = ft_strlen(s1) + ft_strlen(s2) + 1;
	str = (char *)malloc(sizeof(char) * length);
	if (str == NULL)
		return (NULL);
	ft_strcpy(str, s1);
	ft_strcat(str, s2);
	return (str);
}