myLib/ft_substr.c at main · so0ran/myLib · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_substr.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: belkarto <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/10/10 11:06:56 by belkarto          #+#    #+#             */
/*   Updated: 2022/10/24 12:16:48 by belkarto         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
#include "libft.h"

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

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