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/* ************************************************************************** */
/* LE - / */
/* / */
/* ft_atoi.c .:: .:/ . .:: */
/* +:+:+ +: +: +:+:+ */
/* By: rbousset <marvin@le-101.fr> +:+ +: +: +:+ */
/* #+# #+ #+ #+# */
/* Created: 2019/10/10 05:32:13 by rbousset #+# ## ## #+# */
/* Updated: 2019/10/15 02:16:20 by rbousset ### #+. /#+ ###.fr */
/* / */
/* / */
/* ************************************************************************** */
#include "libft.h"
#include <inttypes.h>
static uint8_t
ft_isaspace(int c)
{
if (c == '\t' ||
c == '\n' ||
c == '\v' ||
c == '\f' ||
c == '\r' ||
c == ' ')
return (1);
return (0);
}
static int8_t
ft_setsign(const char c)
{
int8_t sign;
sign = 1;
if (c == '-')
sign = -1;
return (sign);
}
static uint8_t
ft_seti(const char *str)
{
uint8_t i;
i = 0;
while (ft_isaspace(str[i]))
i++;
return (i);
}
int
ft_atoi(const char *str)
{
uint8_t i;
int8_t sign;
long nb;
if (!str || !*str)
return (0);
i = ft_seti(str);
nb = 0;
sign = 1;
if (str[i] == '+' || str[i] == '-')
sign = ft_setsign(str[i++]);
while (ft_isdigit(str[i]))
{
if (nb * 10 + (str[i] - 48) < nb)
{
if (sign < 0)
return (0);
return (-1);
}
nb = nb * 10 + (str[i] - 48);
i++;
}
nb *= sign;
return ((int)nb);
}
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