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ft_atoi.c
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ft_atoi.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_atoi.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: kalmheir <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2021/09/30 21:32:38 by kalmheir #+# #+# */
/* Updated: 2021/10/05 07:53:13 by kalmheir ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
int ft_atoi(const char *str)
{
char sign;
size_t i;
int result;
int dtc;
result = 0;
i = 0;
sign = 1;
while ((str[i] >= 0x09 && str[i] <= 0x0d) || str[i] == 0x20)
i++;
if (str[i] == '-')
sign = -1;
if (str[i] == '-' || str[i] == '+')
i++;
while (ft_isdigit((int)(str[i])))
{
dtc = result;
result *= 10;
result += (1 * sign) * (str[i] - '0');
if ((dtc ^ result) & 0x80000000 && dtc != 0)
return ((dtc < 0) - 1);
i++;
}
return (result);
}