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ft_atoi.c
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ft_atoi.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_atoi.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: dapanciu <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2022/04/12 10:54:20 by dapanciu #+# #+# */
/* Updated: 2022/05/03 20:00:24 by dapanciu ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
int ft_isprintx(int i, const char *str)
{
i = 0;
while (str[i] == ' ' || str[i] == '\f' || str[i] == '\n' \
|| str[i] == '\r' || str[i] == '\t' || str[i] == '\v')
{
i++;
}
return (i);
}
int ft_atoi(const char *str)
{
int i;
int result;
int sign;
i = 0;
result = 0;
sign = 1;
i = ft_isprintx(i, str);
if (str[i] == '-' || str[i] == '+')
sign = 1 - 2 * (str[i++] == '-');
while (str[i] >= '0' && str[i] <= '9')
{
if ((result > INT_MAX / 10) \
|| (result == INT_MAX / 10))
{
if (sign == 1)
return (INT_MAX);
return (INT_MIN);
}
result = result * 10 + str[i++] - '0';
}
return (result * sign);
}