ft_substr.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_substr.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: schetty <schetty@student.42kl.edu.my>      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/05/09 00:42:46 by schetty           #+#    #+#             */
/*   Updated: 2021/11/12 09:36:06 by schetty          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

	if (!s)
		return (NULL);
	s_len = 0;
	while (s[s_len])
		s_len++;
	if (start > s_len)
		len = 0;
	else if (len > (s_len - start))
		len = s_len - start;
	dst = malloc(sizeof(char) * (len + 1));
	if (!dst)
		return (NULL);
	i = -1;
	while (++i < len + 1)
		dst[i] = 0;
	if (start < s_len)
	{
		while (len--)
			dst[len] = s[start + len];
	}
	return (dst);
}