39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
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/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_atoul.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: cchauvet <cchauvet@student.42angoulem +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2022/09/27 16:14:34 by cchauvet #+# #+# */
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/* Updated: 2023/05/03 11:03:04 by cchauvet ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "extra.h"
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unsigned long ft_atoul(const char *str)
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{
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unsigned long out;
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char sign;
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size_t i;
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sign = 1;
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i = 0;
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while (str[i] == '-' || str[i] == '+')
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{
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if (str[i] == '-')
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sign = -1;
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if (str[i] == '+')
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sign = 1;
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i++;
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}
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out = 0;
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while (str[i] >= '0' && str[i] <= '9')
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{
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out = out * 10 + str[i] - 48;
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i++;
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}
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return (out * sign);
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}
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