UtilLib

2025-08-04 13:20:27 +02:00
commit d215954dec
43 changed files with 1931 additions and 0 deletions
@@ -0,0 +1,56 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_strtod.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: yantoine <yantoine@student.42.fr>          +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/10/27 16:49:09 by yantoine          #+#    #+#             */
+/*   Updated: 2024/11/13 23:04:59 by yantoine         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+static int	partie_entiere(double *entier, char *string, int i, double *sign)
+{
+	if (string[i] == '-')
+	{
+		*sign = -1;
+		i++;
+	}
+	while (string[i] && ft_isdigit(string[i]))
+	{
+		*entier = *entier * 10 + (string[i] - '0');
+		i++;
+	}
+	return (i);
+}
+
+//fonction qui convertie une string en double
+double	ft_strtod(char *string)
+{
+	double		entier;
+	double		decimal;
+	double		diviseur;
+	double		sign;
+	int			i;
+
+	i = 0;
+	entier = 0;
+	decimal = 0;
+	diviseur = 1;
+	sign = 1;
+	i = partie_entiere(&entier, string, i, &sign);
+	if (string[i] == '.')
+	{
+		i++;
+		while (string[i] && ft_isdigit(string[i]))
+		{
+			decimal = decimal * 10 + (string[i] - '0');
+			diviseur *= 10;
+			i++;
+		}
+	}
+	return ((entier + decimal / diviseur) * sign);
+}