rotate.c

#include "monty.h"
/**
 * rotl_op - brings the top of the stack to the bottom
 * @list: Head of the stack/queue
 * @line_num: Line number of the instruction
 */
void rotl_op(stack_t **list, unsigned int line_num)
{
	stack_t *move = *list;

	if ((*list) == NULL || (*list)->next == NULL || !line_num)
		return;

	while (move->next != NULL)
		move = move->next;

	move->next = (*list);
	*list = (*list)->next;
	(*list)->prev->next = NULL;
	(*list)->prev->prev = move;
	(*list)->prev = NULL;
}

/**
 * rotr_op - brings the bottom of the stack to the top
 * @list: Head of the stack/queue
 * @line_num: Line number of the instruction
 */
void rotr_op(stack_t **list, unsigned int line_num)
{
	stack_t *node = *list;
	int node_n, prev_n;

	if (node == NULL || node->next == NULL)
		return;

	node_n = prev_n = node->n;
	while (node && line_num)
	{
		node_n = node->n;
		node->n = prev_n;

		node = node->next;
		prev_n = node_n;
	}
	(*list)->n = node_n;
}