ft_strdup.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strdup.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: yshimoda <yshimoda@student.42tokyo.jp>     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/07/06 11:14:10 by yshimoda          #+#    #+#             */
/*   Updated: 2022/10/24 10:47:12 by yshimoda         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"
#include <stdlib.h>
#include <errno.h>

char	*ft_strdup(const char *s1)
{
	char	*ptr;
	char	*save;

	ptr = (char *)malloc(ft_strlen(s1) + 1);
	if (!ptr)
	{
		errno = ENOMEM;
		return (NULL);
	}
	save = ptr;
	while (*s1)
		*ptr++ = *s1++;
	*ptr = 0;
	return (save);
}