1 files changed, 96 insertions, 0 deletions
diff --git a/input_handling.c b/input_handling.c
new file mode 100644
index 0000000..93e37f6
--- /dev/null
+++ b/input_handling.c
@@ -0,0 +1,96 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   input_handling.c                                   :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/04/12 17:31:49 by dkaiser           #+#    #+#             */
+/*   Updated: 2024/04/12 18:49:38 by dkaiser          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "push_swap.h"
+
+static int	is_nbr(char *str)
+{
+	if (*str == '-')
+		str++;
+	while (*str)
+	{
+		if (ft_isdigit(*str))
+			str++;
+		else
+			return (0);
+	}
+	return (1);
+}
+
+static int	is_input_only_nbrs(int argc, char *argv[])
+{
+	while (argc-- > 1)
+	{
+		if (!is_nbr(argv[argc]))
+			return (0);
+	}
+	return (1);
+}
+
+static int	are_numbers_unique(t_list *stack)
+{
+	t_list	*cmp_elem;
+
+	while (stack->next)
+	{
+		cmp_elem = stack->next;
+		while (cmp_elem->next)
+		{
+			if (*(int *)stack->content == *(int *)cmp_elem->content)
+				return (0);
+			cmp_elem = cmp_elem->next;
+		}
+		stack = stack->next;
+	}
+	return (1);
+}
+
+static t_list	*get_stack_from_input(int argc, char *argv[])
+{
+	t_list	*result;
+	t_list	*cur;
+	int		*content;
+
+	result = NULL;
+	while (argc-- > 1)
+	{
+		content = malloc(sizeof(int));
+		if (content)
+		{
+			*content = ft_atoi(argv[argc]);
+			cur = ft_lstnew(content);
+			if (cur)
+			{
+				ft_lstadd_front(&result, cur);
+				continue ;
+			}
+			free(content);
+		}
+		ft_lstclear(&result, free);
+		return (NULL);
+	}
+	return (result);
+}
+
+t_list	*create_stack(int argc, char *argv[])
+{
+	t_list	*result;
+
+	if (!is_input_only_nbrs(argc, argv))
+		return (NULL);
+	result = get_stack_from_input(argc, argv);
+	if (!result)
+		return (NULL);
+	if (!are_numbers_unique(result))
+		ft_lstclear(&result, free);
+	return (result);
+}