Push Swap

position.c

@@ -0,0 +1,96 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   position.c                                         :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: aortigos <aortigos@student.42.fr>          +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/08/13 05:12:56 by aortigos          #+#    #+#             */
+/*   Updated: 2024/08/13 05:32:46 by aortigos         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "push_swap.h"
+
+static void	get_position(t_stack **stack)
+{
+	t_stack	*tmp;
+	int		i;
+
+	tmp = *stack;
+	i = 0;
+	while (tmp)
+	{
+		tmp->pos = i;
+		tmp = tmp->next;
+		i++;
+	}
+}
+
+static int	get_target(t_stack **stack_a, int index_b, int target_i, int target)
+{
+	t_stack	*tmp;
+
+	tmp = *stack_a;
+	while (tmp)
+	{
+		if (tmp->index > index_b && tmp->index < target_i)
+		{
+			target_i = tmp->index;
+			target = tmp->pos;
+		}
+		tmp = tmp->next;
+	}
+	if (target_i != INT_MAX)
+		return (target);
+	tmp = *stack_a;
+	while (tmp)
+	{
+		if (tmp->index < target_i)
+		{
+			target_i = tmp->index;
+			target = tmp->pos;
+		}
+		tmp = tmp->next;
+	}
+	return (target);
+}
+
+int	position_lowest_index(t_stack **stack)
+{
+	t_stack	*tmp;
+	int		lowest_i;
+	int		lowest_p;
+
+	tmp = *stack;
+	lowest_i = INT_MAX;
+	get_position(stack);
+	lowest_p = tmp->pos;
+	while (tmp)
+	{
+		if (tmp->index < lowest_i)
+		{
+			lowest_i = tmp->index;
+			lowest_p = tmp->pos;
+		}
+		tmp = tmp->next;
+	}
+	return (lowest_p);
+}
+
+void	get_target_position(t_stack **stack_a, t_stack **stack_b)
+{
+	t_stack	*tmp;
+	int		target;
+
+	tmp = *stack_b;
+	get_position(stack_a);
+	get_position(stack_b);
+	target = 0;
+	while (tmp)
+	{
+		target = get_target(stack_a, tmp->index, INT_MAX, target);
+		tmp->target = target;
+		tmp = tmp->next;
+	}
+}