libft/ft_substr.c at main · usefJoseph/libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_substr.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: ychihab <[email protected]>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/10/06 11:32:58 by ychihab           #+#    #+#             */
/*   Updated: 2022/10/24 08:20:08 by ychihab          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

	if (!s)
		return (NULL);
	if (start > ft_strlen(s))
		return (ft_calloc(1, 1));
	i = 0;
	if (len > ft_strlen(s + start))
		len = ft_strlen(s + start);
	ptr = malloc(len + 1);
	if (ptr == NULL)
		return (0);
	while (start + i < ft_strlen(s) && i < len)
	{
		ptr[i] = s[i + start];
		i++;
	}
	ptr[i] = '\0';
	return (ptr);
}