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ft_atoi.c
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ft_atoi.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_atoi.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: lsasse <lsasse@student.42berlin.de> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2023/11/18 19:23:08 by lsasse #+# #+# */
/* Updated: 2023/11/23 11:57:50 by lsasse ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
int ft_atoi(const char *str)
{
int i;
int sign;
long long res;
i = 0;
sign = 1;
res = 0;
while (str[i] == ' ' || ((9 <= str[i]) && (str[i] <= 13)))
i++;
if (str[i] == '+')
i++;
else if (str[i] == '-')
{
sign = -1;
i++;
}
while (str[i] && ('0' <= str[i]) && (str[i] <= '9'))
{
res = (res * 10) + (str[i] - '0');
i++;
}
return (sign * res);
}