58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_atod.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: victor </var/spool/mail/victor> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2024/09/08 22:25:35 by victor #+# #+# */
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/* Updated: 2024/12/05 20:08:42 by vvobis ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "libft.h"
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double atod_collect_fraction(char *n, double d)
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{
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int period;
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int mult;
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mult = 1;
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period = 0;
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while (*n && !ft_isspace(*n))
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{
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if (*n == '.' && period == 0)
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{
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period = 1;
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n++;
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continue ;
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}
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else if (((*n == '.' && period == 1) || (*n != '.' && !ft_isdigit(*n))))
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return (ft_putendl_fd("Invalid double format: Too many periods", \
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2), exit(1), 0);
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if (period)
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mult *= 10;
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d *= 10;
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d += (*n - '0');
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n++;
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}
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return (d / mult);
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}
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double ft_atod(char *n)
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{
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double d;
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int sign;
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if (!n)
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exit(1);
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sign = 1;
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if (*n == '-')
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{
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sign = -1;
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n++;
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}
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d = 0;
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return (atod_collect_fraction(n, d) * sign);
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}
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