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ft_atoi.c
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ft_atoi.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_atoi.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: alaparic <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2022/09/13 19:40:20 by alaparic #+# #+# */
/* Updated: 2022/09/25 12:09:45 by alaparic ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
int ft_atoi(const char *str)
{
int sign;
size_t num;
sign = 1;
num = 0;
while ((*str > 8 && *str < 14) || *str == 32)
str++;
if (*str == '+' || *str == '-')
{
if (*str == '-')
sign *= -1;
str++;
}
while (*str >= '0' && *str <= '9')
{
num = num * 10 + (*str - '0');
str++;
}
if (num > 9223372036854775807 && sign == 1)
return (-1);
else if (num > 9223372036854775807 && sign == -1)
return (0);
return (sign * num);
}