Push Swap

stack.c

@@ -0,0 +1,74 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   stack.c                                            :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: aortigos <aortigos@student.42.fr>          +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/08/12 06:02:23 by aortigos          #+#    #+#             */
+/*   Updated: 2024/08/12 06:22:20 by aortigos         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "push_swap.h"
+
+t_stack	*stack_new(int value)
+{
+	t_stack	*new;
+
+	new = malloc(sizeof(t_stack));
+	if (!new)
+		return (NULL);
+	new->value = value;
+	new->index = 0;
+	new->pos = -1;
+	new->target = -1;
+	new->cost_a = -1;
+	new->cost_b = -1;
+	new->next = NULL;
+	return (new);
+}
+
+void	stack_add(t_stack **stack, t_stack *new)
+{
+	t_stack	*bottom;
+
+	if (!new)
+		return ;
+	if (!*stack)
+	{
+		*stack = new;
+		return ;
+	}
+	bottom = get_bottom(*stack);
+	bottom->next = new;
+}
+
+t_stack	*get_bottom(t_stack *stack)
+{
+	while (stack && stack->next != NULL)
+		stack = stack->next;
+	return (stack);
+}
+
+t_stack	*before_bottom(t_stack *stack)
+{
+	while (stack && stack->next->next != NULL)
+		stack = stack->next;
+	return (stack);
+}
+
+int	get_stack_size(t_stack *stack)
+{
+	int	size;
+
+	size = 0;
+	if (!stack)
+		return (0);
+	while (stack)
+	{
+		stack = stack->next;
+		size++;
+	}
+	return (size);
+}