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ft_atoi.c
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ft_atoi.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_atoi.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: eryudi-m <eryudi-m@student.42sp.org.br> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2022/05/08 19:56:39 by eryudi-m #+# #+# */
/* Updated: 2022/05/08 20:48:06 by eryudi-m ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
int ft_atoi(const char *nptr)
{
int cnt;
int minus_sign;
int res;
cnt = 0;
minus_sign = 1;
res = 0;
while (nptr[cnt] == ' ' || nptr[cnt] == '\n' || nptr[cnt] == '\t' || \
nptr[cnt] == '\v' || nptr[cnt] == '\f' || nptr[cnt] == '\r')
cnt++;
if (nptr[cnt] == '-' || nptr[cnt] == '+')
{
if (nptr[cnt] == '-')
minus_sign = -1;
cnt++;
}
while (nptr[cnt] >= '0' && nptr[cnt] <= '9')
{
res = (res * 10) + (nptr[cnt] - '0');
cnt++;
}
return (res * minus_sign);
}