42-libft/ft_strlen.c at master · Kjur0/42-libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strlen.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: kjurkows <kjurkows@student.42warsaw.pl>    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2026/06/15 20:39:46 by kjurkows          #+#    #+#             */
/*   Updated: 2026/06/25 17:41:13 by kjurkows         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"
//# Part 1
//## string manipulation

/** @brief calculate string length
 *
 * count characters up to first `NUL`-terminator (`'\0'`)
 *
 * @param s	string being array of `char`
 * @return	length of a string
 */
size_t	ft_strlen(const char *s)
{
	size_t	len;

	if (!s)
		return (0);
	len = 0;
	while (s[len])
		len++;
	return (len);
}