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ft_atoi2.c
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ft_atoi2.c
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/* ************************************************************************** */
/* */
/* :::::::: */
/* ft_atoi2.c :+: :+: */
/* +:+ */
/* By: eutrodri <[email protected]> +#+ */
/* +#+ */
/* Created: 2020/06/11 11:32:44 by eutrodri #+# #+# */
/* Updated: 2020/07/05 11:43:13 by eutienne ######## odam.nl */
/* */
/* ************************************************************************** */
#include "../includes/lem_in.h"
static long long loop_str(const char *str, int i)
{
long long res;
res = 0;
while (str[i] != '\0' && str[i] >= '0' && str[i] <= '9')
{
res = res * 10 + str[i] - '0';
i++;
}
if (str[i] != '\0')
exit(ft_error(12));
return (res);
}
int ft_atoi2(const char *str)
{
long long res;
int sign;
int i;
res = 0;
sign = 1;
i = 0;
while ((str[i] == '\n') || (str[i] == '\t') || (str[i] == '\v') || \
(str[i] == ' ') || (str[i] == '\f') || (str[i] == '\r'))
i++;
if (str[i] == '-')
{
if (ft_strcmp(&str[i], "-2147483648") == 0)
return (-2147483648);
sign = -1;
if (str[i + 1] == '\0')
exit(ft_error(12));
i++;
}
else if (str[i] == '+')
i++;
res = loop_str(str, i);
if ((res * sign) > 2147483647 || (res * sign) < -2147483648)
exit(ft_error(12));
return (sign * res);
}