1 files changed, 39 insertions, 0 deletions
diff --git a/src/str/ft_atoi_strict.c b/src/str/ft_atoi_strict.c
new file mode 100644
index 0000000..6156b03
--- /dev/null
+++ b/src/str/ft_atoi_strict.c
@@ -0,0 +1,39 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_strict_atoi.c                                   :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/01/15 10:06:29 by cacharle          #+#    #+#             */
+/*   Updated: 2020/01/15 14:09:03 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+#include <stdio.h>
+int	ft_strict_atoi(const char *s)
+{
+	char	*end;
+	long	ret;
+
+	if (*s != '-' && !ft_isdigit(*s))
+	{
+		errno = EINVAL;
+		return (0);
+	}
+	errno = 0;
+	ret = ft_strtol(s, &end, 10);
+	if (errno == ERANGE || ret > INT_MAX || ret < INT_MIN)
+	{
+		errno = ERANGE;
+		return (0);
+	}
+	if (*end != '\0')
+	{
+		errno = EINVAL;
+		return (0);
+	}
+	return (ret);
+}