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opcodes_0.c
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opcodes_0.c
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#include "monty.h"
/**
* mty_op_push - Pushes an element to the stack
* @stack: The pointer to the stack of data
* @line_number: The current line number
*/
void mty_op_push(stack_t **stack, unsigned int line_number)
{
char *line = get_lines()[line_number - 1];
char *opname = NULL, *arg = NULL, data_mode = DF_LIFO;
int o = 0, arg_int = 0;
opname = read_word(line, &o);
arg = read_word(line, &o);
free(opname);
if ((arg != NULL) && is_integer(arg))
{
arg_int = atoi(arg);
free(arg);
data_mode = *get_data_mode();
if (data_mode == DF_LIFO)
{
push(stack, arg_int);
}
else if (data_mode == DF_FIFO)
{
enqueue(stack, arg_int);
}
}
else
{
if (arg != NULL)
free(arg);
fprintf(stderr, "L%d: usage: push integer\n", line_number);
exit_program(EXIT_FAILURE);
}
}
/**
* mty_op_pall - Prints all the values on the stack, \
* starting from the top of the stack
* @stack: The pointer to the stack of data
* @line_number: The current line number
*/
void mty_op_pall(stack_t **stack, unsigned int line_number)
{
char data_mode = *get_data_mode();
stack_t *node = NULL;
if (stack != NULL)
{
node = get_top_element(stack);
while ((node != NULL))
{
printf("%d\n", node->n);
if (data_mode == DF_FIFO)
{
node = node->next;
}
else if (data_mode == DF_LIFO)
{
node = node->prev;
}
}
}
(void)line_number;
}
/**
* mty_op_pint - Prints the value at the top of the stack, \
* followed by a new line
* @stack: The pointer to the stack of data
* @line_number: The current line number
*/
void mty_op_pint(stack_t **stack, unsigned int line_number)
{
char error = TRUE;
stack_t *node = NULL;
if (stack != NULL)
{
node = get_top_element(stack);
if (node != NULL)
{
printf("%d\n", node->n);
error = FALSE;
}
}
if (error)
{
fprintf(stderr, "L%d: can't pint, stack empty\n", line_number);
exit_program(EXIT_FAILURE);
}
}
/**
* mty_op_pop - Removes the top element of the stack
* @stack: The pointer to the stack of data
* @line_number: The current line number
*/
void mty_op_pop(stack_t **stack, unsigned int line_number)
{
char data_mode = *get_data_mode();
if ((stack != NULL) && (*stack != NULL))
{
if (data_mode == DF_FIFO)
{
dequeue(stack);
}
else if (data_mode == DF_LIFO)
{
pop(stack);
}
}
else
{
fprintf(stderr, "L%d: can't pop an empty stack\n", line_number);
exit_program(EXIT_FAILURE);
}
}
/**
* mty_op_swap - Swaps the top two elements of the stack
* @stack: The pointer to the stack of data
* @line_number: The current line number
*/
void mty_op_swap(stack_t **stack, unsigned int line_number)
{
char data_mode = *get_data_mode(), error = TRUE;
stack_t *top0 = NULL, *top1 = NULL;
int tmp = 0;
if (stack != NULL && (*stack != NULL))
{
top0 = get_top_element(stack);
if (data_mode == DF_FIFO)
{
top1 = top0->next;
}
else if (data_mode == DF_LIFO)
{
top1 = top0->prev;
}
if (top1 != NULL)
{
tmp = top1->n;
top1->n = top0->n;
top0->n = tmp;
error = FALSE;
}
}
if (error)
{
fprintf(stderr, "L%d: can't swap, stack too short\n", line_number);
exit_program(EXIT_FAILURE);
}
}