ft_substr.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_substr.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: sbin-jef <sbin-jef@student.42kl.edu.my>    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/08/11 22:48:11 by sbin-jef          #+#    #+#             */
/*   Updated: 2024/08/11 22:58:45 by sbin-jef         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

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

size_t	ft_strlen(const char *str)
{
	size_t	len;

	len = 0;
	while (str[len])
		len++;
	return (len);
}

char	*ft_substr(char const *s, size_t start, size_t len)
{
	char	*substr;
	size_t	i;
	size_t	s_len;

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