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opcodes.c
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opcodes.c
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#include "monty.h"
/**
* _push - pushes an elemento to the stack
*
* @stack: stack to push to
* @line: current line number
*
* Return: void
*/
void _push(stack_t **stack, unsigned int line)
{
stack_t *new;
new = malloc(sizeof(stack_t));
if (new == NULL)
error_handler(3, line, NULL, NULL);
/*Valores fijos, independiente de la sitaucion*/
new->n = argument;
new->next = NULL;
if (*stack == NULL)
{
*stack = new;
new->prev = NULL;
return;
}
new->prev = *stack;
while (new->prev->next)
{
new->prev = new->prev->next;
}
new->prev->next = new;
}
/**
* _pall - prints element of a stack from the top
*
* @stack: stack to be printed
* @line: current line number
*
* Return: void
*/
void _pall(stack_t **stack, unsigned int line)
{
stack_t *curr;
(void) line;
if (*stack == NULL)
return;
curr = *stack;
while (curr->next)
curr = curr->next;
while (curr)
{
printf("%d\n", curr->n);
curr = curr->prev;
}
}
/**
* _pint - prints the top element of a stack
*
* @stack: stack to print element from
* @line: current line number
*
* Return: void
*/
void _pint(stack_t **stack, unsigned int line)
{
stack_t *curr;
if (*stack == NULL)
error_handler(5, line, NULL, NULL);
curr = *stack;
while (curr->next)
{
curr = curr->next;
}
printf("%d\n", curr->n);
}
/**
* _pop - removes the top element of a stack
*
* @stack: stack to remove from
* @line: current line number
*
* Return: void
*/
void _pop(stack_t **stack, unsigned int line)
{
stack_t *curr;
if (*stack == NULL)
error_handler(6, line, NULL, NULL);
curr = *stack;
while (curr->next)
{
curr = curr->next;
}
if (curr->prev == NULL)
*stack = NULL;
else
curr->prev->next = NULL;
free(curr);
}
/**
* _empty - does nothing
*
* @stack: pointer to the head of the stack
* @line: current line number
*
* Return: void
*/
void _empty(stack_t **stack, unsigned int line)
{
(void) stack;
(void) line;
}