42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
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/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_atof.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: gtertysh <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2016/10/31 10:27:11 by gtertysh #+# #+# */
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/* Updated: 2018/06/21 19:46:28 by gtertysh ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "libft.h"
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double ft_atof(const char *str)
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{
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double fraction;
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double number;
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int sign;
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char ch;
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fraction = 1;
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number = 0.0;
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sign = 1;
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ch = 0;
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while (str && *str && (ch = GETCH(str)) && ft_isspace(ch))
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;
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if (ch == '-' && (ch = GETCH(str)))
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sign = -1;
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if (ch == '+' && (ch = GETCH(str)))
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sign = 1;
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while (ch && ft_isdigit(ch))
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{
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number = number * 10.0 + (ch - '0');
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ch = GETCH(str);
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}
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if ('.' == ch)
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while ((ch = GETCH(str)) && ft_isdigit(ch) && (fraction *= 0.1))
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number += (ch - '0') * fraction;
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return (number * sign);
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}
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