42_libft/ft_substr.c at master · grignetta/42_libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_substr.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: dpadenko <dpadenko@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/09/11 16:43:58 by dpadenko          #+#    #+#             */
/*   Updated: 2023/09/20 11:25:53 by dpadenko         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

//#include <stdio.h>
//#include <stdlib.h>
#include "libft.h"

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

	if (ft_strlen(s) < start)
		return (ft_strdup(""));
	if (len > (ft_strlen(s) - start))
	{
		len = ft_strlen(s) - start;
	}
	str = malloc(len + 1);
	if (str == NULL)
		return (NULL);
	i = 0;
	while (i < len && s[start + i] != '\0')
	{
		str[i] = s[start + i];
		i++;
	}
	str[len] = '\0';
	return (str);
}
/*
int main(void)
{
    char a[] = "0123456789";
	char *substr = ft_substr(a, 9, 10);
    if (substr != NULL)
	{
		printf("%s\n", substr);
		free(substr);
	}
}
*/