stack_ops.c

#include "monty.h"

/**
 * Push - pushes to stack;
 *
 * @stack: stack
 * @number: line_number
 */
void Push(stack_t **stack, unsigned int number)
{
	int value;

	if (Input.Bytecodes[1] == NULL || isNum(Input.Bytecodes[1]) == FALSE)
		ErrExit(*stack, "L%d: usage: push integer\n", number);

	value = atoi(Input.Bytecodes[1]);
	switch (Input.Mode)
	{
		case STACK_MODE:			/* Operate in stack mode */
			if (fpush(stack, value) == NULL)
				ErrExit(*stack, "Error: malloc failed\n");
			break;
		case QUEUE_MODE:			/* Operate in queue mode */
			if (enqueue(stack, value) == NULL)
				ErrExit(*stack, "Error: malloc failed\n");
			break;
	}
}

/**
 * Pop - pops from stack.
 *
 * @stack: a stack.
 * @number: line number.
 */
void Pop(stack_t **stack, unsigned int number)
{
	if (isEmpty(*stack))
		ErrExit(*stack, "L%d: can't pop an empty stack\n", number);
	fpop(stack);
}

/**
 * Rotr - rotates the stack to the bottom
 *
 * @stack: a stack.
 * @number: line number.
 */
void Rotr(stack_t **stack, unsigned int number)
{
	UNUSED(number);

	if (stackLen(*stack) > 1)
		fpush(stack, lpop(stack));
}

/**
 * Rotl - rotates the stack to the top
 *
 * @stack: a stack.
 * @number: line number.
 */
void Rotl(stack_t **stack, unsigned int number)
{
	UNUSED(number);

	if (!isEmpty(*stack))
		enqueue(stack, fpop(stack));
}

/**
 * Swap - swaps top two element.
 *
 * @stack: a stack.
 * @number: line number.
 */
void Swap(stack_t **stack, unsigned int number)
{
	if (stackLen(*stack) < 2)
		ErrExit(*stack, "L%d: can't swap, stack too short\n", number);
	fswap(stack);
}