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/* Swfdec
* Copyright (C) 2007 Benjamin Otte <otte@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#ifndef _SWFDEC_AS_STACK_H_
#define _SWFDEC_AS_STACK_H_
#include <swfdec/swfdec_as_types.h>
G_BEGIN_DECLS
struct _SwfdecAsStack {
guint n_elements; /* number of elements */
guint used_elements; /* elements in use (only set on stored stack) */
SwfdecAsStack * next; /* pointer to next stack */
SwfdecAsValue elements[0]; /* the elements */
};
gboolean swfdec_as_stack_push_segment (SwfdecAsContext * context);
void swfdec_as_stack_pop_segment (SwfdecAsContext * context);
//#define SWFDEC_MAD_CHECKS
#ifdef SWFDEC_MAD_CHECKS
#include <swfdec/swfdec_as_context.h>
static inline SwfdecAsValue *
swfdec_as_stack_peek (SwfdecAsContext *cx, guint n)
{
g_assert (cx != NULL);
g_assert (n > 0);
g_assert (cx->cur - n >= cx->base);
return &(cx)->cur[-(gssize)(n)];
}
static inline SwfdecAsValue *
swfdec_as_stack_pop (SwfdecAsContext *cx)
{
g_assert (cx != NULL);
g_assert (cx->cur > cx->base);
return --cx->cur;
}
static inline SwfdecAsValue *
swfdec_as_stack_pop_n (SwfdecAsContext *cx, guint n)
{
g_assert (cx != NULL);
g_assert ((guint) (cx->cur - cx->base) >= n);
return cx->cur -= n;
}
static inline SwfdecAsValue *
swfdec_as_stack_push (SwfdecAsContext *cx)
{
g_assert (cx != NULL);
g_assert (cx->cur < cx->end);
cx->cur->type = SWFDEC_AS_TYPE_OBJECT + 1;
return cx->cur++;
}
#else /* SWFDEC_MAD_CHECKS */
#define swfdec_as_stack_peek(cx,n) (&(cx)->cur[-(gssize)(n)])
#define swfdec_as_stack_pop(cx) (--(cx)->cur)
#define swfdec_as_stack_pop_n(cx, n) ((cx)->cur -= (n))
#define swfdec_as_stack_push(cx) ((cx)->cur++)
#endif
#define swfdec_as_stack_swap(cx,x,y) G_STMT_START { \
SwfdecAsContext *__cx = (cx); \
SwfdecAsValue __tmp; \
guint __x = (x), __y = (y); \
__tmp = *swfdec_as_stack_peek(__cx, __x); \
*swfdec_as_stack_peek(__cx, __x) = *swfdec_as_stack_peek(__cx, __y); \
*swfdec_as_stack_peek(__cx, __y) = __tmp; \
}G_STMT_END
void swfdec_as_stack_mark (SwfdecAsStack * stack);
void swfdec_as_stack_ensure_size (SwfdecAsContext * context,
guint n_elements);
void swfdec_as_stack_ensure_free (SwfdecAsContext * context,
guint n_elements);
guint swfdec_as_stack_get_size (SwfdecAsContext * context);
G_END_DECLS
#endif
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