/*
** create a copy of a portion of s, begining at start and of length len
*/

/*
**	#include <libc.h>
**
**	char	*ft_substr(char const *s, unsigned int start, size_t len);
**
**	char	*ft_strdup(const char *src)
**	{
**		int		i;
**		char	*str;
**
**		i = 0;
**		while (src[i] != '\0')
**			i++;
**		if (!(str = (char*)malloc(sizeof(*str) * (i + 1))))
**			return (NULL);
**		while (i-- >= 0)
**			str[i + 1] = src[i + 1];
**		return (str);
**	}
**
**	int		ft_strncmp(const char *s1, const char *s2, size_t n)
**	{
**		size_t	i;
**		int		res;
**
**		i = 0;
**		res = 0;
**		while (s1[i] && s1[i] == s2[i] && i < n - 1)
**			i++;
**		if (n != 0)
**			res = (unsigned char)s1[i] - (unsigned char)s2[i];
**		return (res);
**	}
**
**	size_t		ft_strlen(const char *str)
**	{
**		size_t i;
**
**		i = 0;
**		while (str[i])
**			i++;
**		return (i);
**	}
**
**	int		main(int ac, char **av)
**	{
**		char	*str;
**
**		str = "";
**		size_t	size = 0;
**		char	*ret = ft_substr(str, 5, size);
**		if (!ft_strncmp(ret, str + 5, size))
**			printf("gloups\n");
**		free(ret);
**		return (0);
**	}
*/

#include "libft.h"

char	*ft_substr(char const *s, unsigned int start, size_t len)
{
	char	*str;
	size_t	i;

	if (!s)
		return (NULL);
	if (ft_strlen(s) < start)
		return (ft_strdup(""));
	if (!(str = (char *)malloc(sizeof(char) * (len + 1))))
		return (NULL);
	i = 0;
	while (i < len && s[start])
		str[i++] = s[start++];
	str[i] = '\0';
	return (str);
}