/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: whaffman <whaffman@student.codam.nl>       +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/06/11 15:22:52 by whaffman          #+#    #+#             */
/*   Updated: 2024/06/12 20:21:53 by whaffman         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include <stdio.h>
#include <string.h>

int	ft_isdigit(char c)
{
	return (c >= '0' && c <= '9');
}

int	ft_isspace(char c)
{
	return (' ' == c || '\f' == c || \
			'\n' == c || '\r' == c || \
			'\t' == c || '\v' == c);
}

int	ft_atoi(char *str)
{
	int	sign;
	int	res;

	while (ft_isspace(*str))
		str++;
	res = 0;
	sign = 1;
	while (*str == '-' || *str == '+')
	{
		if (*str == '-')
			sign *= -1;
		str++;
	}
	while (ft_isdigit(*str))
		res = 10 * res + sign * (*str++ - '0');
	return (res);
}

#ifdef DEBUG

void	test(char *str)
{
	printf("string: \"%s\"\n", str);
	printf("int:    %d\n", ft_atoi(str));
}

int	main(void)
{
	test("");
	test("123");
	test("-123");
	test("-2147483648");
	test("2147483647");
	test("   ----+++-1234");
	test("12345a1234");
	test("123.34");
	return (0);
}

#endif