Merge branch 'master' into ft_ssl

1 files changed, 44 insertions, 0 deletions

diff --git a/src/str/ft_strtof.c b/src/str/ft_strtof.c
new file mode 100644
index 0000000..f147394
--- /dev/null
+++ b/src/str/ft_strtof.c
@@ -0,0 +1,44 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   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);
+}