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ft_atoi.c
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ft_atoi.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_atoi.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: fay <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2022/10/04 17:14:59 by fay #+# #+# */
/* Updated: 2022/10/20 12:10:14 by fay ### ########.fr */
/* */
/* ************************************************************************** */
#include <stdio.h>
int ft_atoi(const char *str)
{
int i;
int neg;
long sayi;
i = 0;
neg = 1;
sayi = 0;
while (str[i] == 32 || (str[i] >= 9 && str[i] <= 13))
i++;
if (str[i] == '-' || str[i] == '+')
{
if (str[i] == '-')
neg *= -1;
i++;
}
while (str[i] >= '0' && str[i] <= '9')
{
sayi = sayi * 10 + (str[i] - 48);
if (sayi * neg < -2147483648)
return (0);
else if (sayi * neg > 2147483647)
return (-1);
i++;
}
return (sayi * neg);
}