Libft/ft_substr.c at main · M677871/Libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_substr.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: miissa <miissa@student.42.fr>              +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/11/08 09:25:08 by miissa            #+#    #+#             */
/*   Updated: 2025/11/08 10:32:43 by miissa           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_substr.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: miissa <miissa@student.42.fr>              +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/11/08 12:12:00 by miissa            #+#    #+#             */
/*   Updated: 2025/11/08 12:12:00 by miissa           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

char	*ft_substr(char const *s, unsigned int start, size_t len)
{
	char	*dest;
	size_t	slen;

	if (!s)
		return (NULL);
	slen = ft_strlen(s);
	if (start >= slen)
	{
		dest = (char *)malloc(sizeof(char));
		if (!dest)
			return (NULL);
		dest[0] = '\0';
		return (dest);
	}
	if (len > slen - start)
		len = slen - start;
	dest = (char *)malloc((len + 1) * sizeof(char));
	if (!dest)
		return (NULL);
	ft_strlcpy(dest, s + start, len + 1);
	return (dest);
}