Projet de l'école 42 : Libft
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/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_atoi.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: narnaud <narnaud@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2021/10/18 17:06:25 by narnaud #+# #+# */
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/* Updated: 2022/03/25 14:14:45 by narnaud ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "../libft.h"
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int ft_atoi(const char *str)
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{
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int sign;
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double nb;
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nb = 0;
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sign = 1;
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if (!ft_strncmp(str, "-2147483648", 11))
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return (-2147483648);
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while (*str == ' ' || (*str >= '\t' && *str <= '\r'))
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str++;
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if (*str == '-' && ++str)
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sign = -1;
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else if (*str == '+')
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str++;
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while (*str >= '0' && *str <= '9')
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{
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nb = nb * 10 + (*str - '0') % 10;
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if (nb > 2147483647 && sign > 0)
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return (-1);
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else if (nb > 2147486648 && sign < 0)
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return (0);
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str++;
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}
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return ((int)(sign * nb));
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}
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