opcode_functions2.c

#include "monty.h"
/**
 * nop_op - does nothing
 * @stack: the stack to be printed from
 * @line_number: the line number
 */
void nop_op(stack_t **stack, unsigned int line_number)
{
	(void) stack;
	(void) line_number;
}
/**
 * add_op - prints the value at the top of the stack
 * @stack: the stack to be printed from
 * @line_number: the line number
 */
void add_op(stack_t **stack, unsigned int line_number)
{
	stack_t *current;

	if (*stack == NULL || (((*stack)->next == NULL && globals.mode == 0)
	|| (((*stack)->prev == NULL) && globals.mode == 1)))
	{
		fprintf(stderr, "L%u: can't add, stack too short\n", line_number);
		free_stack(*stack);
		fclose(globals.file);
		exit(EXIT_FAILURE);
	}
	if (globals.mode == 1)
	{
		while (current->prev->prev)
			current = current->prev;
		current->n += current->prev->n;
	}
	else
	{
		current = (*stack)->next;
		current->n += (*stack)->n;
	}
	pop_op(stack, line_number);
}
/**
 * sub_op - subs the value at the top of the stack
 * @stack: the stack to be changed
 * @line_number: the line number
 */
void sub_op(stack_t **stack, unsigned int line_number)
{
	stack_t *current;

	if (*stack == NULL || (((*stack)->next == NULL && globals.mode == 0)
	|| (((*stack)->prev == NULL) && globals.mode == 1)))
	{
		fprintf(stderr, "L%u: can't sub, stack too short\n", line_number);
		free_stack(*stack);
		fclose(globals.file);
		exit(EXIT_FAILURE);
	}
	if (globals.mode == 1)
	{
		while (current->prev->prev)
			current = current->prev;
		current->n -= current->prev->n;
	}
	else
	{
		current = (*stack)->next;
		current->n -= (*stack)->n;
	}
	pop_op(stack, line_number);
}
/**
 * div_op - divs the value at the top of the stack
 * @stack: the stack to be changed
 * @line_number: the line number
 */
void div_op(stack_t **stack, unsigned int line_number)
{
	stack_t *current = *stack;

	if (*stack == NULL || (((*stack)->next == NULL && globals.mode == 0)
	|| (((*stack)->prev == NULL) && globals.mode == 1)))
	{
		fprintf(stderr, "L%u: can't div, stack too short\n", line_number);
		free_stack(*stack);
		fclose(globals.file);
		exit(EXIT_FAILURE);
	}
	if (globals.mode == 1)
	{
		while (current->prev)
			current = current->prev;
	}
	if ((current)->n == 0)
	{
		fprintf(stderr, "L%u: division by zero\n", line_number);
		free_stack(*stack);
		fclose(globals.file);
		exit(EXIT_FAILURE);
	}
	if (globals.mode == 0)
	{
		current = (*stack)->next;
		current->n /= (*stack)->n;
	}
	else
	{
		current = current->next;
		current->n /= current->prev->n;
	}
	pop_op(stack, line_number);
}
/**
 * mul_op - muls the value at the top of the stack
 * @stack: the stack to be changed
 * @line_number: the line number
 */
void mul_op(stack_t **stack, unsigned int line_number)
{
	stack_t *current;

	if (*stack == NULL || (((*stack)->next == NULL && globals.mode == 0)
	|| (((*stack)->prev == NULL) && globals.mode == 1)))
	{
		fprintf(stderr, "L%u: can't mul, stack too short\n", line_number);
		free_stack(*stack);
		fclose(globals.file);
		exit(EXIT_FAILURE);
	}
	if (globals.mode == 1)
	{
		while (current->prev->prev)
			current = current->prev;
		current->n *= current->prev->n;
	}
	else
	{
		current = (*stack)->next;
		current->n *= (*stack)->n;
	}
	pop_op(stack, line_number);
}