Change stacks from linked lists to rotating arrays

1 files changed, 58 insertions, 25 deletions

diff --git a/stack_utils.c b/stack_utils.c
index ad14504..ac5c63c 100644
--- a/stack_utils.c
+++ b/stack_utils.c
@@ -6,48 +6,81 @@
 /*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/04/12 20:31:30 by dkaiser           #+#    #+#             */
-/*   Updated: 2024/04/13 14:33:35 by dkaiser          ###   ########.fr       */
+/*   Updated: 2024/04/15 17:27:04 by dkaiser          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "push_swap.h"
 
-void	stack_swap(t_list **stack)
+void	stack_swap(t_stack *stack)
 {
-	t_list	*first_elem;
+	int tmp;
 
-	first_elem = *stack;
-	*stack = (*stack)->next;
-	first_elem->next = (*stack)->next;
-	(*stack)->next = first_elem;
+	if (stack->size > 1)
+	{
+		tmp = stack->stack[0];
+		stack->stack[0] = stack->stack[1];
+		stack->stack[1] = tmp;
+	}
 }
 
-void	stack_push(t_list **dst_stack, t_list **src_stack)
+void	stack_push(t_stack *dst_stack, t_stack *src_stack)
 {
-	t_list	*elem;
+	int i;
 
-	elem = *src_stack;
-	*src_stack = elem->next;
-	ft_lstadd_front(dst_stack, elem);
+	i = dst_stack->size - 1;
+	while (i > 0)
+	{
+		dst_stack->stack[i] = dst_stack->stack[i-1];
+		i--;
+	}
+	dst_stack->stack[0] = src_stack->stack[0];
+	dst_stack->size++;
+	i = 1;
+	while (i < src_stack->size)
+	{
+		src_stack->stack[i-1] = src_stack->stack[i];
+		i++;
+	}
+	src_stack->size--;
 }
 
-void	stack_rotate(t_list **stack)
+void	stack_rotate(t_stack *stack)
 {
-	t_list	*first_elem;
+	int tmp;
+	int i;
 
-	first_elem = *stack;
-	*stack = (*stack)->next;
-	first_elem->next = NULL;
-	ft_lstlast(*stack)->next = first_elem;
+	tmp = stack->stack[0];
+	i = 1;
+	while (i < stack->size)
+	{
+		stack->stack[i-1] = stack->stack[i];
+		i++;
+	}
+	stack->stack[i-1] = tmp;
 }
 
-void	stack_rrotate(t_list **stack)
+void	stack_rrotate(t_stack *stack)
 {
-	t_list	*first_elem;
+	int tmp;
+	int i;
 
-	first_elem = *stack;
-	while ((*stack)->next->next)
-		*stack = (*stack)->next;
-	(*stack)->next->next = first_elem;
-	(*stack)->next = NULL;
+	i = stack->size - 1;
+	tmp = stack->stack[i];
+	while (i > 0)
+	{
+		stack->stack[i] = stack->stack[i-1];
+		i--;
+	}
+	stack->stack[0] = tmp;
+}
+
+void stack_print(t_stack *stack)
+{
+	int i;
+
+	i = 0;
+	while (i < stack->size)
+		ft_printf("%d ", stack->stack[i++]);
+	ft_printf("\n");
 }