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ft_atod.c
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ft_atod.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_atod.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: bsyvasal <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2023/10/24 11:16:21 by bsyvasal #+# #+# */
/* Updated: 2023/12/04 17:24:09 by bsyvasal ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
static double add_decimal(const char *str)
{
double i;
double n;
i = 0;
n = 10.0;
while (ft_isdigit(*str))
{
i += (*str - '0') / n;
n *= 10;
str++;
}
return (i);
}
double ft_atod(const char *str)
{
double i;
int sign;
sign = 1;
while (ft_isspace(*str))
str++;
if (*str == '+' || *str == '-')
if (*(str++) == '-')
sign *= -1;
i = 0;
while (ft_isdigit(*str))
{
i = i * 10 + *str - '0';
if (i < 0)
{
if (sign == 1)
return (-1);
return (0);
}
str++;
}
if (*str == '.' || *str == ',')
i += add_decimal(++str);
return (i * sign);
}