libft/ft_substr.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33

/* ************************************************************************** */
/*                                                          LE - /            */
/*                                                              /             */
/*   ft_substr.c                                      .::    .:/ .      .::   */
/*                                                 +:+:+   +:    +:  +:+:+    */
/*   By: rbousset <marvin@le-101.fr>                +:+   +:    +:    +:+     */
/*                                                 #+#   #+    #+    #+#      */
/*   Created: 2019/10/12 15:37:02 by rbousset     #+#   ##    ##    #+#       */
/*   Updated: 2019/10/13 08:33:09 by rbousset    ###    #+. /#+    ###.fr     */
/*                                                         /                  */
/*                                                        /                   */
/* ************************************************************************** */

#include "libft.h"
#include <stddef.h>

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

	if (start > ft_strlen(s) - 1)
	{
		nstr = (char*)ft_calloc(1, sizeof(char));
		if (!nstr)
			return (NULL);
		return (nstr);
	}
	nstr = (char*)ft_calloc(len + 1, sizeof(char));
	if (!nstr)
		return (NULL);
	return ((char*)ft_memcpy(nstr, s + start, len));
}