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ft_atoi.c
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ft_atoi.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_atoi.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: gahubaul <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2015/11/30 16:50:58 by gahubaul #+# #+# */
/* Updated: 2015/11/30 16:51:00 by gahubaul ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
int ft_atoi(const char *str)
{
int result;
int negatif;
result = 0;
negatif = 0;
while (*str == ' ' || *str == '\v' || *str == '\t' || *str == '\f'
|| *str == '\r' || *str == '\n')
str++;
if (*str == '-')
{
negatif = 1;
str++;
}
else if (*str == '+')
str++;
while (*str >= '0' && *str <= '9')
{
result += *str++ - '0';
if (*str >= '0' && *str <= '9')
result *= 10;
}
return (negatif ? -result : result);
}