#define STACK_NEW \
    array_t *p_stack = ifj_malloc(sizeof(array_t)); \
    int *pi_stack; \
    int *pi_stack_top; \
    array_init(p_stack, 256, sizeof(int));
#define STACK_DELETE \
    array_destroy(p_stack); \
    ifj_free(p_stack);
#define PUSH(x) \
    array_push(p_stack, pi_stack, pi_stack_top); \
    *pi_stack_top = x;
#define POP(x) \
    array_toppop(p_stack, pi_stack, pi_stack_top);
#define TOP(x) \
    array_top(p_stack, pi_stack_top); \
    x = *pi_stack_top;
#define TOPPOP(x) \
    array_toppop(p_stack, pi_stack, pi_stack_top); \
    x = *pi_stack_top;