42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_atois.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: tmaze <tmaze@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2019/02/27 11:58:44 by tmaze #+# #+# */
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/* Updated: 2019/03/16 15:47:50 by tmaze ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "libft.h"
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int ft_atois(const char *str, int *nb)
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{
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int num;
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int mult;
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int max;
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num = 0;
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while (ft_iswhitespace(str[num]))
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num++;
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max = (str[num] == '-') ? FT_INT_MIN : FT_INT_MAX;
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if (str[num] == '+' || str[num] == '-')
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num++;
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while (str[num] != '\0' && ft_isdigit(str[num]))
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num++;
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num--;
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*nb = 0;
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mult = 1;
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while (num >= 0 && ft_isdigit(str[num])
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&& (ft_abs(max - *nb) >= 2000000000))
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{
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*nb += (str[num--] - '0') * mult;
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mult *= 10;
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}
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if (num >= 0 && str[num] == '-')
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*nb *= -1;
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return (!ft_isdigit(str[num]) || ft_abs(max - *nb) >= 2000000000);
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}
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