+#define _nc_stdscr_pseudo_panel _nc_panelhook()->stdscr_pseudo_panel
+#define _nc_top_panel _nc_panelhook()->top_panel
+#define _nc_bottom_panel _nc_panelhook()->bottom_panel
+
+#endif /* NCURSES_SP_FUNCS */
+
+#define EMPTY_STACK() (_nc_top_panel == _nc_bottom_panel)
+#define Is_Bottom(p) (((p) != (PANEL*)0) && !EMPTY_STACK() && (_nc_bottom_panel->above == (p)))
+#define Is_Top(p) (((p) != (PANEL*)0) && !EMPTY_STACK() && (_nc_top_panel == (p)))
+#define Is_Pseudo(p) (((p) != (PANEL*)0) && ((p) == _nc_bottom_panel))
+
+/*+-------------------------------------------------------------------------
+ IS_LINKED(pan) - check to see if panel is in the stack
+--------------------------------------------------------------------------*/
+/* This works! The only case where it would fail is, when the list has
+ only one element. But this could only be the pseudo panel at the bottom */
+#define IS_LINKED(p) (((p)->above || (p)->below ||((p)==_nc_bottom_panel)) ? TRUE : FALSE)
+
+#define PSTARTX(pan) ((pan)->win->_begx)
+#define PENDX(pan) ((pan)->win->_begx + getmaxx((pan)->win) - 1)
+#define PSTARTY(pan) ((pan)->win->_begy)
+#define PENDY(pan) ((pan)->win->_begy + getmaxy((pan)->win) - 1)
+
+/*+-------------------------------------------------------------------------
+ PANELS_OVERLAPPED(pan1,pan2) - check panel overlapped
+---------------------------------------------------------------------------*/
+#define PANELS_OVERLAPPED(pan1,pan2) \
+(( !(pan1) || !(pan2) || \
+ PSTARTY(pan1) > PENDY(pan2) || PENDY(pan1) < PSTARTY(pan2) ||\
+ PSTARTX(pan1) > PENDX(pan2) || PENDX(pan1) < PSTARTX(pan2) ) \
+ ? FALSE : TRUE)
+
+
+/*+-------------------------------------------------------------------------
+ Compute the intersection rectangle of two overlapping rectangles
+---------------------------------------------------------------------------*/
+#define COMPUTE_INTERSECTION(pan1,pan2,ix1,ix2,iy1,iy2)\
+ ix1 = (PSTARTX(pan1) < PSTARTX(pan2)) ? PSTARTX(pan2) : PSTARTX(pan1);\
+ ix2 = (PENDX(pan1) < PENDX(pan2)) ? PENDX(pan1) : PENDX(pan2);\
+ iy1 = (PSTARTY(pan1) < PSTARTY(pan2)) ? PSTARTY(pan2) : PSTARTY(pan1);\
+ iy2 = (PENDY(pan1) < PENDY(pan2)) ? PENDY(pan1) : PENDY(pan2);\
+ assert((ix1<=ix2) && (iy1<=iy2))
+
+
+/*+-------------------------------------------------------------------------
+ Walk through the panel stack starting at the given location and
+ check for intersections; overlapping panels are "touched", so they
+ are incrementally overwriting cells that should be hidden.
+ If the "touch" flag is set, the panel gets touched before it is
+ updated.
+---------------------------------------------------------------------------*/
+#define PANEL_UPDATE(pan,panstart)\
+{ PANEL* pan2 = ((panstart) ? (panstart) : _nc_bottom_panel);\
+ while(pan2 && pan2->win) {\
+ if ((pan2 != pan) && PANELS_OVERLAPPED(pan,pan2)) {\
+ int y, ix1, ix2, iy1, iy2;\
+ COMPUTE_INTERSECTION(pan, pan2, ix1, ix2, iy1, iy2);\
+ for(y = iy1; y <= iy2; y++) {\
+ if (is_linetouched(pan->win,y - PSTARTY(pan))) {\
+ struct ldat* line = &(pan2->win->_line[y - PSTARTY(pan2)]);\
+ CHANGED_RANGE(line, ix1 - PSTARTX(pan2), ix2 - PSTARTX(pan2));\
+ }\
+ }\
+ }\
+ pan2 = pan2->above;\
+ }\
+}
+
+/*+-------------------------------------------------------------------------
+ Remove panel from stack.
+---------------------------------------------------------------------------*/
+#define PANEL_UNLINK(pan,err) \
+{ err = ERR;\
+ if (pan) {\
+ if (IS_LINKED(pan)) {\
+ if ((pan)->below)\
+ (pan)->below->above = (pan)->above;\
+ if ((pan)->above)\
+ (pan)->above->below = (pan)->below;\
+ if ((pan) == _nc_bottom_panel) \
+ _nc_bottom_panel = (pan)->above;\
+ if ((pan) == _nc_top_panel) \
+ _nc_top_panel = (pan)->below;\
+ err = OK;\
+ }\
+ (pan)->above = (pan)->below = (PANEL*)0;\
+ }\
+}
+
+#define HIDE_PANEL(pan,err,err_if_unlinked)\
+ if (IS_LINKED(pan)) {\
+ Touchpan(pan);\
+ PANEL_UPDATE(pan,(PANEL*)0);\
+ PANEL_UNLINK(pan,err);\
+ } \
+ else {\
+ err = err_if_unlinked;\
+ }
+
+#if NCURSES_SP_FUNCS
+/* These may become later renamed and part of panel.h and the public API */
+extern NCURSES_EXPORT(void) NCURSES_SP_NAME(_nc_update_panels)(SCREEN*);