/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   helper.c                                           :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/02/08 23:22:49 by cacharle          #+#    #+#             */
/*   Updated: 2021/01/10 10:32:06 by cacharle         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "common.h"

long int	h_atou_strict(char *s)
{
	long int	num;
	char		*origin;

	origin = s;
	if (*s < '0' || *s > '9')
		return (h_err(-1, "Error: %s: is not a number", origin));
	num = 0;
	while (*s >= '0' && *s <= '9')
	{
		num *= 10;
		if (num > UINT_MAX)
			return (h_err(-1, "Error: %s: is too big", origin));
		num += *s - '0';
		if (num > UINT_MAX)
			return (h_err(-1, "Error: %s: is too big", origin));
		s++;
	}
	if (*s != '\0')
		return (h_err(-1, "Error: %s: is not a number", origin));
	return (num);
}

/*
** No need to check error of gettimeofday
** (only for settimeofday and passed pointer validity)
*/

t_time		h_time_now(void)
{
	struct timeval	tv;

	gettimeofday(&tv, NULL);
	return (tv.tv_sec * 1000 + tv.tv_usec / 1000);
}

void		h_sleep(t_time sleep_time)
{
	t_time	start;

	start = h_time_now();
	while (h_time_now() - start < sleep_time)
		usleep(500);
}

char		*h_nbrcpy(char *dst, long long int num)
{
	if (num > 9)
		dst = h_nbrcpy(dst, num / 10);
	dst[0] = num % 10 + '0';
	return (dst + 1);
}

char		*h_strcpy_end(char *dst, const char *str)
{
	while (*str != '\0')
		*dst++ = *str++;
	return (dst);
}

#define PHILO_SEM_EAT_BUF_SIZE 2048

const char		*philo_sem_eat_name(const char *prefix, long int id)
{
	static char	buf[PHILO_SEM_EAT_BUF_SIZE];
	char		*end;

	buf[0] = '\0';
	end = h_strcpy_end(buf, prefix);
	h_nbrcpy(end, id);
	return (buf);
}