ft_substr.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_substr.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: doley <doley@student.42.fr>                +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/10/09 15:33:27 by doley             #+#    #+#             */
/*   Updated: 2024/10/09 19:22:45 by doley            ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

	if (!s)
		return (NULL);
	s_len = ft_strlen(s);
	if (start >= s_len)
		return (ft_strdup(""));
	if (s_len - start < len)
		substr_len = s_len - start;
	else
		substr_len = len;
	substr = ft_calloc(substr_len + 1, sizeof(char));
	if (!substr)
		return (NULL);
	ft_strlcpy(substr, s + start, substr_len + 1);
	return (substr);
}