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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_atoi.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: cacharle <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/10/07 09:46:16 by cacharle #+# #+# */
/* Updated: 2019/11/20 01:43:18 by cacharle ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
#define MIN_INT -2147483648
#define MAX_INT 2147483647
int ft_atoi(const char *str)
{
unsigned int nb;
int i;
int is_negative;
while (*str == ' ' || *str == '\t' || *str == '\n'
|| *str == '\v' || *str == '\f' || *str == '\r')
str++;
is_negative = 0;
if (*str == '-' || *str == '+')
if (*str++ == '-')
is_negative = 1;
i = 0;
nb = 0;
while (ft_isdigit(str[i]))
{
if (!is_negative && nb > (unsigned int)MAX_INT)
return (-1);
else if (nb > (unsigned int)MIN_INT)
return (0);
nb *= 10;
nb += str[i++] & 0x0F;
}
return ((int)(is_negative ? -nb : nb));
}
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