ft_substr.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        ::::::::            */
/*   ft_substr.c                                        :+:    :+:            */
/*                                                     +:+                    */
/*   By: tclement <tclement@student.codam.nl>         +#+                     */
/*                                                   +#+                      */
/*   Created: 2020/04/13 13:29:22 by tclement      #+#    #+#                 */
/*   Updated: 2020/05/20 10:48:22 by tclement      ########   odam.nl         */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

	if (s == NULL)
		return (NULL);
	if (start > ft_strlen(s))
		return (ft_strdup(""));
	if (start + len > ft_strlen(s))
		len = ft_strlen(s) - start;
	sub = ft_calloc(len + 1, sizeof(char));
	if (sub == NULL)
		return (NULL);
	index = 0;
	while (index < len && s[index] != '\0')
	{
		sub[index] = s[start];
		index++;
		start++;
	}
	sub[index] = '\0';
	return (sub);
}