ft_strdup.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strdup.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: mmasuda <mmasuda@student.42tokyo.jp>       +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/04/11 22:30:20 by mmasuda           #+#    #+#             */
/*   Updated: 2021/04/18 22:09:25 by mmasuda          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

static char	*ft_strcpy(char *dst, const char *src)
{
	int	i;

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

char	*ft_strdup(const char *s1)
{
	char	*s2;
	int		len;

	len = ft_strlen(s1);
	s2 = (char *)malloc(sizeof(char) * (len + 1));
	if (!s2)
		return (NULL);
	return (ft_strcpy(s2, s1));
}