splited src in category, more generic makefile

1 files changed, 43 insertions, 0 deletions

diff --git a/src/str/ft_atoi.c b/src/str/ft_atoi.c
new file mode 100644
index 0000000..0ad6022
--- /dev/null
+++ b/src/str/ft_atoi.c
@@ -0,0 +1,43 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_atoi.c                                          :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2019/10/07 09:46:16 by cacharle          #+#    #+#             */
+/*   Updated: 2020/01/15 09:26:14 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+#define MIN_INT -2147483648
+#define MAX_INT 2147483647
+
+int			ft_atoi(const char *str)
+{
+	unsigned int	nb;
+	int				i;
+	int				is_negative;
+
+	while (*str == ' ' || *str == '\t' || *str == '\n'
+			|| *str == '\v' || *str == '\f' || *str == '\r')
+		str++;
+	is_negative = 0;
+	if (*str == '-' || *str == '+')
+		if (*str++ == '-')
+			is_negative = 1;
+	i = 0;
+	nb = 0;
+	while (ft_isdigit(str[i]))
+	{
+		if (!is_negative && nb > (unsigned int)MAX_INT)
+			return (-1);
+		else if (nb > (unsigned int)MIN_INT)
+			return (0);
+		nb *= 10;
+		nb += str[i++] & 0x0F;
+	}
+	return ((int)(is_negative ? -nb : nb));
+}