43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_atof.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: qviguier <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2016/03/11 18:10:24 by qviguier #+# #+# */
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/* Updated: 2017/01/10 18:26:45 by ntrahy ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "libft.h"
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float ft_atof(char *str)
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{
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float rez[2];
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int dot_seen;
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rez[0] = 0;
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rez[1] = 1;
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dot_seen = 0;
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while (*str == ' ')
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str++;
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if (*str == '-' || *str == '+')
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rez[1] *= *(str) == '-' ? -1 : 1;
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if (*str == '-' || *str == '+')
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str++;
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while ((ft_isdigit(*str) || *str == '.') && *str != '\0')
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{
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if (dot_seen == 0 && *str == '.')
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dot_seen = 1;
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else if (ft_isdigit(*str))
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{
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if (dot_seen)
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rez[1] /= 10.0f;
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rez[0] = rez[0] * 10.0f + (float)(*str - '0');
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}
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str++;
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}
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return (rez[0] * rez[1]);
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}
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