MontyStack/pop_pint_swap_add.c at main · ayobamiseun/MontyStack · GitHub

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#include "monty.h"

/**
 * _pop - deletes the node
 * @stack: pointer to a stack_t list
 * @n: line number
 *
 * Return: void has no return
 */
void _pop(stack_t **stack, unsigned int n)
{
	stack_t *node;

	(void) n;

	if (!stack || !(*stack))
	{
		fprintf(stderr, "L%u: can't pop an empty stack\n", n);
		exit(EXIT_FAILURE);
	}

	node = *stack;

	if ((*stack)->next)
	{
		*stack = (*stack)->next;
		(*stack)->prev = NULL;
	}
	else
		*stack = NULL;

	free(node);
}

/**
 * _pint - prints the top nodes
 * @stack: pointered to a stack_t lists
 * @n: line counts
 *
 * Return: void has no return
 */
void _pint(stack_t **stack, unsigned int n)
{
	if (!stack || !(*stack))
	{
		fprintf(stderr, "L%u: can't pint, stack empty\n", n);
		exit(EXIT_FAILURE);
	}

	fprintf(stdout, "%d\n", (*stack)->n);
}

/**
 * _swap - swaps the position of data
 * @stack: pointer to a stack_t
 * @line_number: line count
 *
 * Return: void has no return
 */
void _swap(stack_t **stack, unsigned int line_number)
{
	int store = 0;

	if ((stack == NULL) || (*stack == NULL) || ((*stack)->next) == NULL)
	{
		fprintf(stderr, "L%u: can't swap, stack too short\n", line_number);
		if (*stack)
			free_stack(stack);
		exit(EXIT_FAILURE);
	}

	(void) line_number;

	store = (*stack)->next->n;
	(*stack)->next->n = (*stack)->n;
	(*stack)->n = store;
}

/**
 * _add - adds a node to the node
 * @stack: pointer to a stack_t lists
 * @line_number: line count
 *
 * Return: void has no return
 */
void _add(stack_t **stack, unsigned int line_number)
{
	if (stack == NULL || (*stack == NULL) || ((*stack)->next == NULL))
	{
		fprintf(stderr, "L%u: can't add, stack too short\n", line_number);
		if (*stack)
			free_stack(stack);
		exit(EXIT_FAILURE);
	}
	(*stack)->next->n = ((*stack)->next->n) + ((*stack)->n);
	_pop(stack, line_number);
}