philosopher/file.c at master · mamali543/philosopher · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   file.c                                             :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: mamali <mamali@student.42.fr>              +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/10/11 18:12:43 by mamali            #+#    #+#             */
/*   Updated: 2021/10/11 18:24:52 by mamali           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "philo.h"

int	ft_isdigit(int c)
{
	if (c >= 48 && c <= 57)
		return (1);
	return (0);
}

size_t	ft_strlen(const char *str)
{
	int	i;

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

void	log_error(char *msg)
{
	write(2, msg, ft_strlen(msg));
}

static int	whitespace(char c)
{
	if (c == '\n' || c == '\v' || c == '\f' || c == '\t' || c == '\r')
		return (1);
	if (c == ' ')
		return (1);
	return (0);
}

long long	ft_atoi(const char *str)
{
	int				i;
	int				negativity;
	unsigned long	result;

	result = 0;
	negativity = 1;
	i = 0;
	while (whitespace(str[i]))
		i++;
	if (str[i] == '-')
		negativity = -1;
	if (str[i] == '+' || str[i] == '-')
		i++;
	while (str[i] >= 48 && str[i] <= 57)
	{
		result = result * 10 + (str[i] - 48);
		i++;
	}
	return (result * negativity);
}