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Copy path4-8_opcodes.c
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4-8_opcodes.c
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#include "monty.h"
/* global variable <essential> make available in this file */
trackg_t essential;
/**
* add_opcode - adds the top two elements of the stack
*
* @stack: pointer to the pointer to the top most element/node
* of the stack
* @line_number: line number of the executing opcode
*
* Return: nothing
*/
void add_opcode(stack_t **stack, unsigned int line_number)
{
int temp;
if (essential.stack_size < 2)
{
fprintf(stderr, "L%u: can't add, stack too short\n", line_number);
fclose(essential.fp);
if (essential.stack_size == 1)
stack_free_all(*stack);
exit(EXIT_FAILURE);
}
temp = (*stack)->n;
stack_pop(stack);
(*stack)->n += temp;
}
/**
* nop_opcode - doesn’t do anything
*
* @stack: pointer to the pointer to the top most element/node
* of the stack
* @line_number: line number of the executing opcode
*
* Return: nothing
*/
void nop_opcode(stack_t **stack, unsigned int line_number)
{
(void)stack;
(void)line_number;
}
/**
* sub_opcode - subtracts the top element of the stack from the
* second top element of the stack
*
* @stack: pointer to the pointer to the top most element/node
* of the stack
* @line_number: line number of the executing opcode
*
* Return: nothing
*/
void sub_opcode(stack_t **stack, unsigned int line_number)
{
int temp;
if (essential.stack_size < 2)
{
fprintf(stderr, "L%u: can't sub, stack too short\n", line_number);
fclose(essential.fp);
if (essential.stack_size == 1)
stack_free_all(*stack);
exit(EXIT_FAILURE);
}
temp = (*stack)->n;
stack_pop(stack);
(*stack)->n -= temp;
}
/**
* div_opcode - divides the second top element of the stack
* by the top element of the stack
*
* @stack: pointer to the pointer to the top most element/node
* of the stack
* @line_number: line number of the executing opcode
*
* Return: nothing
*/
void div_opcode(stack_t **stack, unsigned int line_number)
{
int temp;
if (essential.stack_size < 2)
{
fprintf(stderr, "L%u: can't div, stack too short\n", line_number);
fclose(essential.fp);
if (essential.stack_size == 1)
stack_free_all(*stack);
exit(EXIT_FAILURE);
}
temp = (*stack)->n;
if (temp == 0)
{
fprintf(stderr, "L%u: division by zero\n", line_number);
fclose(essential.fp);
stack_free_all(*stack);
exit(EXIT_FAILURE);
}
stack_pop(stack);
(*stack)->n /= temp;
}
/**
* mul_opcode - swaps the top two elements of the stack
*
* @stack: pointer to the pointer to the top most element/node
* of the stack
* @line_number: line number of the executing opcode
*
* Return: nothing
*/
void mul_opcode(stack_t **stack, unsigned int line_number)
{
int temp;
if (essential.stack_size < 2)
{
fprintf(stderr, "L%u: can't mul, stack too short\n", line_number);
fclose(essential.fp);
if (essential.stack_size == 1)
stack_free_all(*stack);
exit(EXIT_FAILURE);
}
temp = (*stack)->n;
stack_pop(stack);
(*stack)->n *= temp;
}