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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_strtof.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: charles <charles.cabergs@gmail.com> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/05/09 12:09:13 by charles #+# #+# */
/* Updated: 2020/05/09 12:23:03 by charles ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft_str.h"
/*
** \brief Extract a float from a string
** \param nptr String to extract from
** \param endptr If not NULL pointer to last character
** of the extraction is placed in *endptr
** \return Extracted float value
** \note This function doesn't try mimic the original perfectly
** (no hexadecimal, exponent, NaN, inf handling)
*/
float ft_strtof(const char *nptr, char **endptr)
{
float n;
bool is_neg;
const char *tmp;
while (ft_isspace(*nptr))
nptr++;
is_neg = *nptr == '-';
if (*nptr == '-' || *nptr == '+')
nptr++;
n = (float)ft_strtol(nptr, (char**)&nptr, 10);
if (*nptr == '.')
nptr++;
tmp = nptr;
n += (float)ft_strtol(nptr, (char**)&nptr, 10) / (10 * (nptr - tmp));
if (endptr != NULL)
*endptr = (char*)nptr;
return (is_neg ? -n : n);
}
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