X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=ncurses%2Fbase%2Flib_set_term.c;h=df0a276aef8a3a61f749226e5eb7216244b5b43d;hp=e44850c6a15a2fb81e2eb728a76ca3c2da8e7edd;hb=687aeec3e382083652c3bb2e94fb6d3bf101a1f9;hpb=b779f5fb4516b3e6d1bc8880ea68923efb761e1d

diff --git a/ncurses/base/lib_set_term.c b/ncurses/base/lib_set_term.c
index e44850c6..df0a276a 100644
--- a/ncurses/base/lib_set_term.c
+++ b/ncurses/base/lib_set_term.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc.              *
+ * Copyright (c) 1998-2009,2010 Free Software Foundation, Inc.              *
  *                                                                          *
  * Permission is hereby granted, free of charge, to any person obtaining a  *
  * copy of this software and associated documentation files (the            *
@@ -30,6 +30,7 @@
  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
  *     and: Thomas E. Dickey                        1996-on                 *
+ *     and: Juergen Pfeifer                         2009                    *
  ****************************************************************************/
 
 /*
@@ -40,36 +41,59 @@
 */
 
 #include <curses.priv.h>
-
-#include <term.h>		/* cur_term */
 #include <tic.h>
 
-MODULE_ID("$Id: lib_set_term.c,v 1.103 2008/02/03 20:31:08 tom Exp $")
+#ifndef CUR
+#define CUR SP_TERMTYPE
+#endif
+
+MODULE_ID("$Id: lib_set_term.c,v 1.138 2010/12/20 00:42:20 tom Exp $")
+
+#ifdef USE_TERM_DRIVER
+#define MaxColors      InfoOf(sp).maxcolors
+#define NumLabels      InfoOf(sp).numlabels
+#else
+#define MaxColors      max_colors
+#define NumLabels      num_labels
+#endif
 
 NCURSES_EXPORT(SCREEN *)
 set_term(SCREEN *screenp)
 {
     SCREEN *oldSP;
+    SCREEN *newSP;
 
-    T((T_CALLED("set_term(%p)"), screenp));
+    T((T_CALLED("set_term(%p)"), (void *) screenp));
 
-    _nc_lock_global(set_SP);
+    _nc_lock_global(curses);
 
-    oldSP = SP;
+    oldSP = CURRENT_SCREEN;
     _nc_set_screen(screenp);
+    newSP = screenp;
 
-    set_curterm(SP->_term);
+    if (newSP != 0) {
+	TINFO_SET_CURTERM(newSP, newSP->_term);
+#if !USE_REENTRANT
+	curscr = CurScreen(newSP);
+	newscr = NewScreen(newSP);
+	stdscr = StdScreen(newSP);
+	COLORS = newSP->_color_count;
+	COLOR_PAIRS = newSP->_pair_count;
+#endif
+    } else {
+	TINFO_SET_CURTERM(oldSP, 0);
 #if !USE_REENTRANT
-    curscr = SP->_curscr;
-    newscr = SP->_newscr;
-    stdscr = SP->_stdscr;
-    COLORS = SP->_color_count;
-    COLOR_PAIRS = SP->_pair_count;
+	curscr = 0;
+	newscr = 0;
+	stdscr = 0;
+	COLORS = 0;
+	COLOR_PAIRS = 0;
 #endif
+    }
 
-    _nc_unlock_global(set_SP);
+    _nc_unlock_global(curses);
 
-    T((T_RETURN("%p"), oldSP));
+    T((T_RETURN("%p"), (void *) oldSP));
     return (oldSP);
 }
 
@@ -83,92 +107,119 @@ _nc_free_keytry(TRIES * kt)
     }
 }
 
+static bool
+delink_screen(SCREEN *sp)
+{
+    SCREEN *last = 0;
+    SCREEN *temp;
+    bool result = FALSE;
+
+    for (each_screen(temp)) {
+	if (temp == sp) {
+	    if (last)
+		last->_next_screen = sp->_next_screen;
+	    else
+		_nc_screen_chain = sp->_next_screen;
+	    result = TRUE;
+	    break;
+	}
+	last = temp;
+    }
+    return result;
+}
+
 /*
  * Free the storage associated with the given SCREEN sp.
  */
 NCURSES_EXPORT(void)
 delscreen(SCREEN *sp)
 {
-    SCREEN **scan = &_nc_screen_chain;
     int i;
 
-    T((T_CALLED("delscreen(%p)"), sp));
-
-    _nc_lock_global(set_SP);
-    while (*scan) {
-	if (*scan == sp) {
-	    *scan = sp->_next_screen;
-	    break;
+    T((T_CALLED("delscreen(%p)"), (void *) sp));
+
+    _nc_lock_global(curses);
+    if (delink_screen(sp)) {
+#ifdef USE_SP_RIPOFF
+	ripoff_t *rop;
+	if (safe_ripoff_sp && safe_ripoff_sp != safe_ripoff_stack) {
+	    for (rop = safe_ripoff_stack;
+		 rop != safe_ripoff_sp && (rop - safe_ripoff_stack) < N_RIPS;
+		 rop++) {
+		if (rop->win) {
+		    (void) delwin(rop->win);
+		    rop->win = 0;
+		}
+	    }
 	}
-	scan = &(*scan)->_next_screen;
-    }
-
-    (void) _nc_freewin(sp->_curscr);
-    (void) _nc_freewin(sp->_newscr);
-    (void) _nc_freewin(sp->_stdscr);
+#endif
 
-    if (sp->_slk != 0) {
-	if (sp->_slk->ent != 0) {
-	    for (i = 0; i < sp->_slk->labcnt; ++i) {
-		FreeIfNeeded(sp->_slk->ent[i].ent_text);
-		FreeIfNeeded(sp->_slk->ent[i].form_text);
+	(void) _nc_freewin(CurScreen(sp));
+	(void) _nc_freewin(NewScreen(sp));
+	(void) _nc_freewin(StdScreen(sp));
+
+	if (sp->_slk != 0) {
+	    if (sp->_slk->ent != 0) {
+		for (i = 0; i < sp->_slk->labcnt; ++i) {
+		    FreeIfNeeded(sp->_slk->ent[i].ent_text);
+		    FreeIfNeeded(sp->_slk->ent[i].form_text);
+		}
+		free(sp->_slk->ent);
 	    }
-	    free(sp->_slk->ent);
+	    free(sp->_slk);
+	    sp->_slk = 0;
 	}
-	free(sp->_slk);
-	sp->_slk = 0;
-    }
-
-    _nc_free_keytry(sp->_keytry);
-    sp->_keytry = 0;
 
-    _nc_free_keytry(sp->_key_ok);
-    sp->_key_ok = 0;
+	_nc_free_keytry(sp->_keytry);
+	sp->_keytry = 0;
 
-    FreeIfNeeded(sp->_current_attr);
+	_nc_free_keytry(sp->_key_ok);
+	sp->_key_ok = 0;
 
-    FreeIfNeeded(sp->_color_table);
-    FreeIfNeeded(sp->_color_pairs);
+	FreeIfNeeded(sp->_current_attr);
 
-    FreeIfNeeded(sp->oldhash);
-    FreeIfNeeded(sp->newhash);
-    FreeIfNeeded(sp->hashtab);
+	FreeIfNeeded(sp->_color_table);
+	FreeIfNeeded(sp->_color_pairs);
 
-    FreeIfNeeded(sp->_acs_map);
-    FreeIfNeeded(sp->_screen_acs_map);
+	FreeIfNeeded(sp->oldhash);
+	FreeIfNeeded(sp->newhash);
+	FreeIfNeeded(sp->hashtab);
 
-    del_curterm(sp->_term);
+	FreeIfNeeded(sp->_acs_map);
+	FreeIfNeeded(sp->_screen_acs_map);
 
-    /*
-     * If the associated output stream has been closed, we can discard the
-     * set-buffer.  Limit the error check to EBADF, since fflush may fail
-     * for other reasons than trying to operate upon a closed stream.
-     */
-    if (sp->_ofp != 0
-	&& sp->_setbuf != 0
-	&& fflush(sp->_ofp) != 0
-	&& errno == EBADF) {
-	free(sp->_setbuf);
-    }
+	/*
+	 * If the associated output stream has been closed, we can discard the
+	 * set-buffer.  Limit the error check to EBADF, since fflush may fail
+	 * for other reasons than trying to operate upon a closed stream.
+	 */
+	if (sp->_ofp != 0
+	    && sp->_setbuf != 0
+	    && fflush(sp->_ofp) != 0
+	    && errno == EBADF) {
+	    free(sp->_setbuf);
+	}
 
-    free(sp);
+	NCURSES_SP_NAME(del_curterm) (NCURSES_SP_ARGx sp->_term);
+	free(sp);
 
-    /*
-     * If this was the current screen, reset everything that the
-     * application might try to use (except cur_term, which may have
-     * multiple references in different screens).
-     */
-    if (sp == SP) {
+	/*
+	 * If this was the current screen, reset everything that the
+	 * application might try to use (except cur_term, which may have
+	 * multiple references in different screens).
+	 */
+	if (sp == CURRENT_SCREEN) {
 #if !USE_REENTRANT
-	curscr = 0;
-	newscr = 0;
-	stdscr = 0;
-	COLORS = 0;
-	COLOR_PAIRS = 0;
+	    curscr = 0;
+	    newscr = 0;
+	    stdscr = 0;
+	    COLORS = 0;
+	    COLOR_PAIRS = 0;
 #endif
-	_nc_set_screen(0);
+	    _nc_set_screen(0);
+	}
     }
-    _nc_unlock_global(set_SP);
+    _nc_unlock_global(curses);
 
     returnVoid;
 }
@@ -186,7 +237,7 @@ no_mouse_inline(SCREEN *sp GCC_UNUSED)
 }
 
 static bool
-no_mouse_parse(int code GCC_UNUSED)
+no_mouse_parse(SCREEN *sp GCC_UNUSED, int code GCC_UNUSED)
 {
     return TRUE;
 }
@@ -221,50 +272,98 @@ extract_fgbg(char *src, int *result)
 }
 #endif
 
+#define ReturnScreenError() _nc_set_screen(0); \
+                            returnCode(ERR)
+
 /* OS-independent screen initializations */
 NCURSES_EXPORT(int)
-_nc_setupscreen(int slines GCC_UNUSED,
-		int scolumns GCC_UNUSED,
-		FILE *output,
-		bool filtered,
-		int slk_format)
+NCURSES_SP_NAME(_nc_setupscreen) (
+#if NCURSES_SP_FUNCS
+				     SCREEN **spp,
+#endif
+				     int slines,
+				     int scolumns,
+				     FILE *output,
+				     bool filtered,
+				     int slk_format)
 {
     char *env;
     int bottom_stolen = 0;
-    bool support_cookies = USE_XMC_SUPPORT;
     ripoff_t *rop;
+    SCREEN *sp;
+#ifndef USE_TERM_DRIVER
+    bool support_cookies = USE_XMC_SUPPORT;
+#endif
 
     T((T_CALLED("_nc_setupscreen(%d, %d, %p, %d, %d)"),
-       slines, scolumns, output, filtered, slk_format));
+       slines, scolumns, (void *) output, filtered, slk_format));
+
+    assert(CURRENT_SCREEN == 0);	/* has been reset in newterm() ! */
 
-    assert(SP == 0);		/* has been reset in newterm() ! */
+#if NCURSES_SP_FUNCS
+    assert(spp != 0);
+    sp = *spp;
+
+    if (!sp) {
+	sp = _nc_alloc_screen_sp();
+	*spp = sp;
+    }
+    if (!sp
+	|| ((sp->_acs_map = typeCalloc(chtype, ACS_LEN)) == 0)
+	|| ((sp->_screen_acs_map = typeCalloc(bool, ACS_LEN)) == 0)) {
+	ReturnScreenError();
+    }
+
+    T(("created SP %p", (void *) sp));
+    sp->_next_screen = _nc_screen_chain;
+    _nc_screen_chain = sp;
+
+    if ((sp->_current_attr = typeCalloc(NCURSES_CH_T, 1)) == 0) {
+	ReturnScreenError();
+    }
+#else
     if (!_nc_alloc_screen()
 	|| ((SP->_acs_map = typeCalloc(chtype, ACS_LEN)) == 0)
 	|| ((SP->_screen_acs_map = typeCalloc(bool, ACS_LEN)) == 0)) {
 	returnCode(ERR);
     }
 
-    T(("created SP %p", SP));
-    SP->_next_screen = _nc_screen_chain;
-    _nc_screen_chain = SP;
+    T(("created SP %p", (void *) SP));
 
-    if ((SP->_current_attr = typeCalloc(NCURSES_CH_T, 1)) == 0)
+    sp = SP;			/* fixup so SET_LINES and SET_COLS works */
+    sp->_next_screen = _nc_screen_chain;
+    _nc_screen_chain = sp;
+
+    if ((sp->_current_attr = typeCalloc(NCURSES_CH_T, 1)) == 0)
 	returnCode(ERR);
+#endif
 
     /*
      * We should always check the screensize, just in case.
      */
-    _nc_get_screensize(&slines, &scolumns);
+    _nc_set_screen(sp);
+    sp->_term = cur_term;
+#ifdef USE_TERM_DRIVER
+    TCBOf(sp)->csp = sp;
+    _nc_get_screensize(sp, sp->_term, &slines, &scolumns);
+#else
+    _nc_get_screensize(sp, &slines, &scolumns);
+#endif
     SET_LINES(slines);
     SET_COLS(scolumns);
-    T((T_CREATE("screen %s %dx%d"), termname(), LINES, COLS));
 
-    SP->_filtered = filtered;
+    T((T_CREATE("screen %s %dx%d"),
+       NCURSES_SP_NAME(termname) (NCURSES_SP_ARG), slines, scolumns));
+
+    sp->_filtered = filtered;
 
     /* implement filter mode */
     if (filtered) {
 	slines = 1;
 	SET_LINES(slines);
+#ifdef USE_TERM_DRIVER
+	CallDriver(sp, setfilter);
+#else
 	clear_screen = 0;
 	cursor_down = parm_down_cursor = 0;
 	cursor_address = 0;
@@ -272,38 +371,25 @@ _nc_setupscreen(int slines GCC_UNUSED,
 	row_address = 0;
 
 	cursor_home = carriage_return;
-	T(("filter screensize %dx%d", LINES, COLS));
+#endif
+	T(("filter screensize %dx%d", slines, scolumns));
     }
 #ifdef __DJGPP__
     T(("setting output mode to binary"));
     fflush(output);
     setmode(output, O_BINARY);
 #endif
-    _nc_set_buffer(output, TRUE);
-    SP->_term = cur_term;
-    SP->_lines = slines;
-    SP->_lines_avail = slines;
-    SP->_columns = scolumns;
-    SP->_cursrow = -1;
-    SP->_curscol = -1;
-    SP->_nl = TRUE;
-    SP->_raw = FALSE;
-    SP->_cbreak = 0;
-    SP->_echo = TRUE;
-    SP->_fifohead = -1;
-    SP->_endwin = TRUE;
-    SP->_ofp = output;
-    SP->_cursor = -1;		/* cannot know real cursor shape */
-
-#if NCURSES_NO_PADDING
-    SP->_no_padding = getenv("NCURSES_NO_PADDING") != 0;
-    TR(TRACE_CHARPUT | TRACE_MOVE, ("padding will%s be used",
-				    SP->_no_padding ? " not" : ""));
-#endif
+    NCURSES_SP_NAME(_nc_set_buffer) (NCURSES_SP_ARGx output, TRUE);
+    sp->_lines = (NCURSES_SIZE_T) slines;
+    sp->_lines_avail = (NCURSES_SIZE_T) slines;
+    sp->_columns = (NCURSES_SIZE_T) scolumns;
+    sp->_ofp = output;
+    SP_PRE_INIT(sp);
+    SetNoPadding(sp);
 
 #if NCURSES_EXT_FUNCS
-    SP->_default_color = FALSE;
-    SP->_has_sgr_39_49 = FALSE;
+    sp->_default_color = FALSE;
+    sp->_has_sgr_39_49 = FALSE;
 
     /*
      * Set our assumption of the terminal's default foreground and background
@@ -325,31 +411,30 @@ _nc_setupscreen(int slines GCC_UNUSED,
      * or black-on-white display under control of the application than not).
      */
 #ifdef USE_ASSUMED_COLOR
-    SP->_default_fg = COLOR_WHITE;
-    SP->_default_bg = COLOR_BLACK;
+    sp->_default_fg = COLOR_WHITE;
+    sp->_default_bg = COLOR_BLACK;
 #else
-    SP->_default_fg = C_MASK;
-    SP->_default_bg = C_MASK;
+    sp->_default_fg = C_MASK;
+    sp->_default_bg = C_MASK;
 #endif
 
     /*
      * Allow those assumed/default color assumptions to be overridden at
      * runtime:
      */
-    if (getenv("NCURSES_ASSUMED_COLORS") != 0) {
-	char *p = getenv("NCURSES_ASSUMED_COLORS");
+    if ((env = getenv("NCURSES_ASSUMED_COLORS")) != 0) {
 	int fg, bg;
 	char sep1, sep2;
-	int count = sscanf(p, "%d%c%d%c", &fg, &sep1, &bg, &sep2);
+	int count = sscanf(env, "%d%c%d%c", &fg, &sep1, &bg, &sep2);
 	if (count >= 1) {
-	    SP->_default_fg = (fg >= 0 && fg < max_colors) ? fg : C_MASK;
+	    sp->_default_fg = ((fg >= 0 && fg < MaxColors) ? fg : C_MASK);
 	    if (count >= 3) {
-		SP->_default_bg = (bg >= 0 && bg < max_colors) ? bg : C_MASK;
+		sp->_default_bg = ((bg >= 0 && bg < MaxColors) ? bg : C_MASK);
 	    }
 	    TR(TRACE_CHARPUT | TRACE_MOVE,
 	       ("from environment assumed fg=%d, bg=%d",
-		SP->_default_fg,
-		SP->_default_bg));
+		sp->_default_fg,
+		sp->_default_bg));
 	}
     }
 #if USE_COLORFGBG
@@ -362,53 +447,51 @@ _nc_setupscreen(int slines GCC_UNUSED,
     if (getenv("COLORFGBG") != 0) {
 	char *p = getenv("COLORFGBG");
 	TR(TRACE_CHARPUT | TRACE_MOVE, ("decoding COLORFGBG %s", p));
-	p = extract_fgbg(p, &(SP->_default_fg));
-	p = extract_fgbg(p, &(SP->_default_bg));
+	p = extract_fgbg(p, &(sp->_default_fg));
+	p = extract_fgbg(p, &(sp->_default_bg));
 	if (*p)			/* assume rxvt was compiled with xpm support */
-	    p = extract_fgbg(p, &(SP->_default_bg));
+	    p = extract_fgbg(p, &(sp->_default_bg));
 	TR(TRACE_CHARPUT | TRACE_MOVE, ("decoded fg=%d, bg=%d",
-					SP->_default_fg, SP->_default_bg));
-	if (SP->_default_fg >= max_colors) {
+					sp->_default_fg, sp->_default_bg));
+	if (sp->_default_fg >= MaxColors) {
 	    if (set_a_foreground != ABSENT_STRING
 		&& !strcmp(set_a_foreground, "\033[3%p1%dm")) {
 		set_a_foreground = "\033[3%?%p1%{8}%>%t9%e%p1%d%;m";
 	    } else {
-		SP->_default_fg %= max_colors;
+		sp->_default_fg %= MaxColors;
 	    }
 	}
-	if (SP->_default_bg >= max_colors) {
+	if (sp->_default_bg >= MaxColors) {
 	    if (set_a_background != ABSENT_STRING
 		&& !strcmp(set_a_background, "\033[4%p1%dm")) {
 		set_a_background = "\033[4%?%p1%{8}%>%t9%e%p1%d%;m";
 	    } else {
-		SP->_default_bg %= max_colors;
+		sp->_default_bg %= MaxColors;
 	    }
 	}
     }
 #endif
 #endif /* NCURSES_EXT_FUNCS */
 
-    SP->_maxclick = DEFAULT_MAXCLICK;
-    SP->_mouse_event = no_mouse_event;
-    SP->_mouse_inline = no_mouse_inline;
-    SP->_mouse_parse = no_mouse_parse;
-    SP->_mouse_resume = no_mouse_resume;
-    SP->_mouse_wrap = no_mouse_wrap;
-    SP->_mouse_fd = -1;
-
-    /* initialize the panel hooks */
-    SP->_panelHook.top_panel = (struct panel *) 0;
-    SP->_panelHook.bottom_panel = (struct panel *) 0;
-    SP->_panelHook.stdscr_pseudo_panel = (struct panel *) 0;
+    sp->_maxclick = DEFAULT_MAXCLICK;
+    sp->_mouse_event = no_mouse_event;
+    sp->_mouse_inline = no_mouse_inline;
+    sp->_mouse_parse = no_mouse_parse;
+    sp->_mouse_resume = no_mouse_resume;
+    sp->_mouse_wrap = no_mouse_wrap;
+    sp->_mouse_fd = -1;
 
     /*
      * If we've no magic cookie support, we suppress attributes that xmc would
      * affect, i.e., the attributes that affect the rendition of a space.
      */
-    SP->_ok_attributes = termattrs();
-    if (has_colors()) {
-	SP->_ok_attributes |= A_COLOR;
+    sp->_ok_attributes = NCURSES_SP_NAME(termattrs) (NCURSES_SP_ARG);
+    if (NCURSES_SP_NAME(has_colors) (NCURSES_SP_ARG)) {
+	sp->_ok_attributes |= A_COLOR;
     }
+#ifdef USE_TERM_DRIVER
+    _nc_cookie_init(sp);
+#else
 #if USE_XMC_SUPPORT
     /*
      * If we have no magic-cookie support compiled-in, or if it is suppressed
@@ -427,7 +510,7 @@ _nc_setupscreen(int slines GCC_UNUSED,
 
     if (magic_cookie_glitch > 0) {	/* tvi, wyse */
 
-	SP->_xmc_triggers = SP->_ok_attributes & (
+	sp->_xmc_triggers = sp->_ok_attributes & (
 						     A_STANDOUT |
 						     A_UNDERLINE |
 						     A_REVERSE |
@@ -444,12 +527,12 @@ _nc_setupscreen(int slines GCC_UNUSED,
 	 * cookies.
 	 */
 	if (has_colors()) {
-	    SP->_xmc_triggers |= A_COLOR;
+	    sp->_xmc_triggers |= A_COLOR;
 	}
 #endif
-	SP->_xmc_suppress = SP->_xmc_triggers & (chtype) ~(A_BOLD);
+	sp->_xmc_suppress = sp->_xmc_triggers & (chtype) ~(A_BOLD);
 
-	T(("magic cookie attributes %s", _traceattr(SP->_xmc_suppress)));
+	T(("magic cookie attributes %s", _traceattr(sp->_xmc_suppress)));
 	/*
 	 * Supporting line-drawing may be possible.  But make the regular
 	 * video attributes work first.
@@ -489,7 +572,7 @@ _nc_setupscreen(int slines GCC_UNUSED,
 
     /* initialize normal acs before wide, since we use mapping in the latter */
 #if !USE_WIDEC_SUPPORT
-    if (_nc_unicode_locale() && _nc_locale_breaks_acs()) {
+    if (_nc_unicode_locale() && _nc_locale_breaks_acs(sp->_term)) {
 	acs_chars = NULL;
 	ena_acs = NULL;
 	enter_alt_charset_mode = NULL;
@@ -497,135 +580,194 @@ _nc_setupscreen(int slines GCC_UNUSED,
 	set_attributes = NULL;
     }
 #endif
-    _nc_init_acs();
+#endif
+
+    NCURSES_SP_NAME(_nc_init_acs) (NCURSES_SP_ARG);
 #if USE_WIDEC_SUPPORT
     _nc_init_wacs();
 
-    SP->_screen_acs_fix = (_nc_unicode_locale() && _nc_locale_breaks_acs());
+    sp->_screen_acs_fix = (_nc_unicode_locale()
+			   && _nc_locale_breaks_acs(sp->_term));
 #endif
     env = _nc_get_locale();
-    SP->_legacy_coding = ((env == 0)
+    sp->_legacy_coding = ((env == 0)
 			  || !strcmp(env, "C")
 			  || !strcmp(env, "POSIX"));
-    T(("legacy-coding %d", SP->_legacy_coding));
-
-    _nc_idcok = TRUE;
-    _nc_idlok = FALSE;
+    T(("legacy-coding %d", sp->_legacy_coding));
 
-    _nc_windows = 0;		/* no windows yet */
+    sp->_nc_sp_idcok = TRUE;
+    sp->_nc_sp_idlok = FALSE;
 
-    SP->oldhash = 0;
-    SP->newhash = 0;
+    sp->oldhash = 0;
+    sp->newhash = 0;
 
     T(("creating newscr"));
-    if ((SP->_newscr = newwin(slines, scolumns, 0, 0)) == 0)
-	returnCode(ERR);
-
+    NewScreen(sp) = NCURSES_SP_NAME(newwin) (NCURSES_SP_ARGx slines, scolumns,
+					     0, 0);
+    if (NewScreen(sp) == 0) {
+	ReturnScreenError();
+    }
     T(("creating curscr"));
-    if ((SP->_curscr = newwin(slines, scolumns, 0, 0)) == 0)
-	returnCode(ERR);
-
+    CurScreen(sp) = NCURSES_SP_NAME(newwin) (NCURSES_SP_ARGx slines, scolumns,
+					     0, 0);
+    if (CurScreen(sp) == 0) {
+	ReturnScreenError();
+    }
 #if !USE_REENTRANT
-    newscr = SP->_newscr;
-    curscr = SP->_curscr;
+    newscr = NewScreen(sp);
+    curscr = CurScreen(sp);
 #endif
 #if USE_SIZECHANGE
-    SP->_resize = resizeterm;
+    sp->_resize = NCURSES_SP_NAME(resizeterm);
 #endif
 
-    newscr->_clear = TRUE;
-    curscr->_clear = FALSE;
-
-    def_shell_mode();
-    def_prog_mode();
-
-    for (rop = ripoff_stack;
-	 rop != ripoff_sp && (rop - ripoff_stack) < N_RIPS;
-	 rop++) {
-
-	/* If we must simulate soft labels, grab off the line to be used.
-	   We assume that we must simulate, if it is none of the standard
-	   formats (4-4 or 3-2-3) for which there may be some hardware
-	   support. */
-	if (rop->hook == _nc_slk_initialize)
-	    if (!(num_labels <= 0 || !SLK_STDFMT(slk_format)))
-		continue;
-	if (rop->hook) {
-	    int count;
-	    WINDOW *w;
-
-	    count = (rop->line < 0) ? -rop->line : rop->line;
-	    T(("ripping off %i lines at %s", count,
-	       ((rop->line < 0)
-		? "bottom"
-		: "top")));
-
-	    w = newwin(count, scolumns,
-		       ((rop->line < 0)
-			? SP->_lines_avail - count
-			: 0),
-		       0);
-	    if (w) {
-		rop->win = w;
-		rop->hook(w, scolumns);
-	    } else {
-		returnCode(ERR);
+    NewScreen(sp)->_clear = TRUE;
+    CurScreen(sp)->_clear = FALSE;
+
+    NCURSES_SP_NAME(def_shell_mode) (NCURSES_SP_ARG);
+    NCURSES_SP_NAME(def_prog_mode) (NCURSES_SP_ARG);
+
+    if (safe_ripoff_sp && safe_ripoff_sp != safe_ripoff_stack) {
+	for (rop = safe_ripoff_stack;
+	     rop != safe_ripoff_sp && (rop - safe_ripoff_stack) < N_RIPS;
+	     rop++) {
+
+	    /* If we must simulate soft labels, grab off the line to be used.
+	       We assume that we must simulate, if it is none of the standard
+	       formats (4-4 or 3-2-3) for which there may be some hardware
+	       support. */
+	    if (rop->hook == _nc_slk_initialize) {
+		if (!(NumLabels <= 0 || !SLK_STDFMT(slk_format))) {
+		    continue;
+		}
+	    }
+	    if (rop->hook) {
+		int count;
+		WINDOW *w;
+
+		count = (rop->line < 0) ? -rop->line : rop->line;
+		T(("ripping off %i lines at %s", count,
+		   ((rop->line < 0)
+		    ? "bottom"
+		    : "top")));
+
+		w = NCURSES_SP_NAME(newwin) (NCURSES_SP_ARGx
+					     count, scolumns,
+					     ((rop->line < 0)
+					      ? sp->_lines_avail - count
+					      : 0),
+					     0);
+		if (w) {
+		    rop->win = w;
+		    rop->hook(w, scolumns);
+		} else {
+		    ReturnScreenError();
+		}
+		if (rop->line < 0) {
+		    bottom_stolen += count;
+		} else {
+		    sp->_topstolen = (NCURSES_SIZE_T) (sp->_topstolen + count);
+		}
+		sp->_lines_avail = (NCURSES_SIZE_T) (sp->_lines_avail - count);
 	    }
-	    if (rop->line < 0)
-		bottom_stolen += count;
-	    else
-		SP->_topstolen += count;
-	    SP->_lines_avail -= count;
 	}
+	/* reset the stack */
+	safe_ripoff_sp = safe_ripoff_stack;
     }
-    /* reset the stack */
-    ripoff_sp = ripoff_stack;
 
     T(("creating stdscr"));
-    assert((SP->_lines_avail + SP->_topstolen + bottom_stolen) == slines);
-    if ((SP->_stdscr = newwin(SP->_lines_avail, scolumns, 0, 0)) == 0)
-	returnCode(ERR);
-
-    SET_LINES(SP->_lines_avail);
+    assert((sp->_lines_avail + sp->_topstolen + bottom_stolen) == slines);
+    if ((StdScreen(sp) = NCURSES_SP_NAME(newwin) (NCURSES_SP_ARGx
+						  sp->_lines_avail,
+						  scolumns, 0, 0)) == 0) {
+	ReturnScreenError();
+    }
+    SET_LINES(sp->_lines_avail);
 #if !USE_REENTRANT
-    stdscr = SP->_stdscr;
+    stdscr = StdScreen(sp);
 #endif
-
+    sp->_prescreen = FALSE;
     returnCode(OK);
 }
 
+#if NCURSES_SP_FUNCS
+NCURSES_EXPORT(int)
+_nc_setupscreen(int slines GCC_UNUSED,
+		int scolumns GCC_UNUSED,
+		FILE *output,
+		bool filtered,
+		int slk_format)
+{
+    SCREEN *sp = 0;
+    int rc = NCURSES_SP_NAME(_nc_setupscreen) (&sp,
+					       slines,
+					       scolumns,
+					       output,
+					       filtered,
+					       slk_format);
+    if (rc != OK)
+	_nc_set_screen(0);
+    return rc;
+}
+#endif
+
 /*
  * The internal implementation interprets line as the number of lines to rip
  * off from the top or bottom.
  */
 NCURSES_EXPORT(int)
-_nc_ripoffline(int line, int (*init) (WINDOW *, int))
+NCURSES_SP_NAME(_nc_ripoffline) (NCURSES_SP_DCLx
+				 int line,
+				 int (*init) (WINDOW *, int))
 {
-    T((T_CALLED("_nc_ripoffline(%d, %p)"), line, init));
+    int code = ERR;
 
-    if (line != 0) {
-
-	if (ripoff_sp == 0)
-	    ripoff_sp = ripoff_stack;
-	if (ripoff_sp >= ripoff_stack + N_RIPS)
-	    returnCode(ERR);
+    START_TRACE();
+    T((T_CALLED("ripoffline(%p,%d,%p)"), (void *) SP_PARM, line, init));
 
-	ripoff_sp->line = line;
-	ripoff_sp->hook = init;
-	ripoff_sp++;
+#if NCURSES_SP_FUNCS
+    if (SP_PARM != 0 && SP_PARM->_prescreen)
+#endif
+    {
+	if (line == 0) {
+	    code = OK;
+	} else {
+	    if (safe_ripoff_sp == 0)
+		safe_ripoff_sp = safe_ripoff_stack;
+	    if (safe_ripoff_sp < safe_ripoff_stack + N_RIPS) {
+		safe_ripoff_sp->line = line;
+		safe_ripoff_sp->hook = init;
+		(safe_ripoff_sp)++;
+		code = OK;
+	    }
+	}
     }
 
-    returnCode(OK);
+    returnCode(code);
 }
 
+#if NCURSES_SP_FUNCS
 NCURSES_EXPORT(int)
-ripoffline(int line, int (*init) (WINDOW *, int))
+_nc_ripoffline(int line, int (*init) (WINDOW *, int))
 {
-    START_TRACE();
-    T((T_CALLED("ripoffline(%d,%p)"), line, init));
+    return NCURSES_SP_NAME(_nc_ripoffline) (CURRENT_SCREEN_PRE, line, init);
+}
+#endif
 
-    if (line == 0)
-	returnCode(OK);
+NCURSES_EXPORT(int)
+NCURSES_SP_NAME(ripoffline) (NCURSES_SP_DCLx
+			     int line,
+			     int (*init) (WINDOW *, int))
+{
+    return NCURSES_SP_NAME(_nc_ripoffline) (NCURSES_SP_ARGx
+					    (line < 0) ? -1 : 1,
+					    init);
+}
 
-    returnCode(_nc_ripoffline((line < 0) ? -1 : 1, init));
+#if NCURSES_SP_FUNCS
+NCURSES_EXPORT(int)
+ripoffline(int line, int (*init) (WINDOW *, int))
+{
+    return NCURSES_SP_NAME(ripoffline) (CURRENT_SCREEN_PRE, line, init);
 }
+#endif