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

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/* ************************************************************************** */
/*                                                                            */
/*                                                        ::::::::            */
/*   ft_substr.c                                        :+:    :+:            */
/*                                                     +:+                    */
/*   By: mgraaf <mgraaf@student.codam.nl>             +#+                     */
/*                                                   +#+                      */
/*   Created: 2021/12/16 14:25:16 by mgraaf        #+#    #+#                 */
/*   Updated: 2021/12/16 14:25:18 by mgraaf        ########   odam.nl         */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

	strln = ft_strlen(s);
	if (!s)
		return (0);
	if (start > strln)
		return (ft_strdup(""));
	if (len > strln - start)
		return (ft_strdup(s + start));
	i = 0;
	substr = (char *)malloc((len * sizeof(char)) + 1);
	if (!substr)
		return (0);
	while (i < len)
	{
		substr[i] = s[start + i];
		i++;
	}
	substr[i] = '\0';
	return (substr);
}