diff --git a/ncurses/base/lib_newwin.c b/ncurses/base/lib_newwin.c
new file mode 100644
index 0000000..587e83a
--- /dev/null
+++ b/ncurses/base/lib_newwin.c
@@ -0,0 +1,338 @@
+/****************************************************************************
+ * Copyright (c) 1998-2007,2008 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            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+
+/****************************************************************************
+ *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
+ *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
+ *     and: Thomas E. Dickey                        1996-on                 *
+ ****************************************************************************/
+
+/*
+**	lib_newwin.c
+**
+**	The routines newwin(), subwin() and their dependent
+**
+*/
+
+#include <curses.priv.h>
+#include <stddef.h>
+
+MODULE_ID("$Id: lib_newwin.c,v 1.52 2008/06/07 13:58:09 tom Exp $")
+
+#define window_is(name) ((sp)->_##name == win)
+
+#if USE_REENTRANT
+#define remove_window(name) \
+		sp->_##name = 0
+#else
+#define remove_window(name) \
+		sp->_##name = 0; \
+		if (win == name) \
+		    name = 0
+#endif
+
+static void
+remove_window_from_screen(WINDOW *win)
+{
+    SCREEN *sp;
+
+    for (each_screen(sp)) {
+	if (window_is(curscr)) {
+	    remove_window(curscr);
+	    break;
+	} else if (window_is(stdscr)) {
+	    remove_window(stdscr);
+	    break;
+	} else if (window_is(newscr)) {
+	    remove_window(newscr);
+	    break;
+	}
+    }
+}
+
+NCURSES_EXPORT(int)
+_nc_freewin(WINDOW *win)
+{
+    WINDOWLIST *p, *q;
+    int i;
+    int result = ERR;
+
+    T((T_CALLED("_nc_freewin(%p)"), win));
+
+    if (win != 0) {
+	if (_nc_try_global(curses) == 0) {
+	    q = 0;
+	    for (each_window(p)) {
+		if (&(p->win) == win) {
+		    remove_window_from_screen(win);
+		    if (q == 0)
+			_nc_windows = p->next;
+		    else
+			q->next = p->next;
+
+		    if (!(win->_flags & _SUBWIN)) {
+			for (i = 0; i <= win->_maxy; i++)
+			    FreeIfNeeded(win->_line[i].text);
+		    }
+		    free(win->_line);
+		    free(p);
+
+		    result = OK;
+		    T(("...deleted win=%p", win));
+		    break;
+		}
+		q = p;
+	    }
+	    _nc_unlock_global(curses);
+	}
+    }
+    returnCode(result);
+}
+
+NCURSES_EXPORT(WINDOW *)
+newwin(int num_lines, int num_columns, int begy, int begx)
+{
+    WINDOW *win;
+    NCURSES_CH_T *ptr;
+    int i;
+
+    T((T_CALLED("newwin(%d,%d,%d,%d)"), num_lines, num_columns, begy, begx));
+
+    if (begy < 0 || begx < 0 || num_lines < 0 || num_columns < 0)
+	returnWin(0);
+
+    if (num_lines == 0)
+	num_lines = SP->_lines_avail - begy;
+    if (num_columns == 0)
+	num_columns = screen_columns - begx;
+
+    if ((win = _nc_makenew(num_lines, num_columns, begy, begx, 0)) == 0)
+	returnWin(0);
+
+    for (i = 0; i < num_lines; i++) {
+	win->_line[i].text = typeCalloc(NCURSES_CH_T, (unsigned) num_columns);
+	if (win->_line[i].text == 0) {
+	    (void) _nc_freewin(win);
+	    returnWin(0);
+	}
+	for (ptr = win->_line[i].text;
+	     ptr < win->_line[i].text + num_columns;
+	     ptr++)
+	    SetChar(*ptr, BLANK_TEXT, BLANK_ATTR);
+    }
+
+    returnWin(win);
+}
+
+NCURSES_EXPORT(WINDOW *)
+derwin(WINDOW *orig, int num_lines, int num_columns, int begy, int begx)
+{
+    WINDOW *win;
+    int i;
+    int flags = _SUBWIN;
+
+    T((T_CALLED("derwin(%p,%d,%d,%d,%d)"), orig, num_lines, num_columns,
+       begy, begx));
+
+    /*
+     * make sure window fits inside the original one
+     */
+    if (begy < 0 || begx < 0 || orig == 0 || num_lines < 0 || num_columns < 0)
+	returnWin(0);
+    if (begy + num_lines > orig->_maxy + 1
+	|| begx + num_columns > orig->_maxx + 1)
+	returnWin(0);
+
+    if (num_lines == 0)
+	num_lines = orig->_maxy + 1 - begy;
+
+    if (num_columns == 0)
+	num_columns = orig->_maxx + 1 - begx;
+
+    if (orig->_flags & _ISPAD)
+	flags |= _ISPAD;
+
+    if ((win = _nc_makenew(num_lines, num_columns, orig->_begy + begy,
+			   orig->_begx + begx, flags)) == 0)
+	returnWin(0);
+
+    win->_pary = begy;
+    win->_parx = begx;
+    WINDOW_ATTRS(win) = WINDOW_ATTRS(orig);
+    win->_nc_bkgd = orig->_nc_bkgd;
+
+    for (i = 0; i < num_lines; i++)
+	win->_line[i].text = &orig->_line[begy++].text[begx];
+
+    win->_parent = orig;
+
+    returnWin(win);
+}
+
+NCURSES_EXPORT(WINDOW *)
+subwin(WINDOW *w, int l, int c, int y, int x)
+{
+    T((T_CALLED("subwin(%p, %d, %d, %d, %d)"), w, l, c, y, x));
+    T(("parent has begy = %ld, begx = %ld", (long) w->_begy, (long) w->_begx));
+
+    returnWin(derwin(w, l, c, y - w->_begy, x - w->_begx));
+}
+
+static bool
+dimension_limit(int value)
+{
+    NCURSES_SIZE_T test = value;
+    return (test == value && value > 0);
+}
+
+NCURSES_EXPORT(WINDOW *)
+_nc_makenew(int num_lines, int num_columns, int begy, int begx, int flags)
+{
+    int i;
+    WINDOWLIST *wp;
+    WINDOW *win;
+    bool is_pad = (flags & _ISPAD);
+
+    T((T_CALLED("_nc_makenew(%d,%d,%d,%d)"), num_lines, num_columns, begy, begx));
+
+    if (SP == 0)
+	returnWin(0);
+
+    if (!dimension_limit(num_lines) || !dimension_limit(num_columns))
+	returnWin(0);
+
+    if ((wp = typeCalloc(WINDOWLIST, 1)) == 0)
+	returnWin(0);
+
+    win = &(wp->win);
+
+    if ((win->_line = typeCalloc(struct ldat, ((unsigned) num_lines))) == 0) {
+	free(win);
+	returnWin(0);
+    }
+
+    _nc_lock_global(curses);
+
+    win->_curx = 0;
+    win->_cury = 0;
+    win->_maxy = num_lines - 1;
+    win->_maxx = num_columns - 1;
+    win->_begy = begy;
+    win->_begx = begx;
+    win->_yoffset = SP->_topstolen;
+
+    win->_flags = flags;
+    WINDOW_ATTRS(win) = A_NORMAL;
+    SetChar(win->_nc_bkgd, BLANK_TEXT, BLANK_ATTR);
+
+    win->_clear = is_pad ? FALSE : (num_lines == screen_lines
+				    && num_columns == screen_columns);
+    win->_idlok = FALSE;
+    win->_idcok = TRUE;
+    win->_scroll = FALSE;
+    win->_leaveok = FALSE;
+    win->_use_keypad = FALSE;
+    win->_delay = -1;
+    win->_immed = FALSE;
+    win->_sync = 0;
+    win->_parx = -1;
+    win->_pary = -1;
+    win->_parent = 0;
+
+    win->_regtop = 0;
+    win->_regbottom = num_lines - 1;
+
+    win->_pad._pad_y = -1;
+    win->_pad._pad_x = -1;
+    win->_pad._pad_top = -1;
+    win->_pad._pad_bottom = -1;
+    win->_pad._pad_left = -1;
+    win->_pad._pad_right = -1;
+
+    for (i = 0; i < num_lines; i++) {
+	/*
+	 * This used to do
+	 *
+	 * win->_line[i].firstchar = win->_line[i].lastchar = _NOCHANGE;
+	 *
+	 * which marks the whole window unchanged.  That's how
+	 * SVr1 curses did it, but SVr4 curses marks the whole new
+	 * window changed.
+	 *
+	 * With the old SVr1-like code, say you have stdscr full of
+	 * characters, then create a new window with newwin(),
+	 * then do a printw(win, "foo        ");, the trailing spaces are
+	 * completely ignored by the following refreshes.  So, you
+	 * get "foojunkjunk" on the screen instead of "foo        " as
+	 * you actually intended.
+	 *
+	 * SVr4 doesn't do this.  Instead the spaces are actually written.
+	 * So that's how we want ncurses to behave.
+	 */
+	win->_line[i].firstchar = 0;
+	win->_line[i].lastchar = num_columns - 1;
+
+	if_USE_SCROLL_HINTS(win->_line[i].oldindex = i);
+    }
+
+    if (!is_pad && (begx + num_columns == screen_columns)) {
+	win->_flags |= _ENDLINE;
+
+	if (begx == 0 && num_lines == screen_lines && begy == 0)
+	    win->_flags |= _FULLWIN;
+
+	if (begy + num_lines == screen_lines)
+	    win->_flags |= _SCROLLWIN;
+    }
+
+    wp->next = _nc_windows;
+    wp->screen = SP;
+    _nc_windows = wp;
+
+    T((T_CREATE("window %p"), win));
+
+    _nc_unlock_global(curses);
+    returnWin(win);
+}
+
+/*
+ * wgetch() and other functions with a WINDOW* parameter may use a SCREEN*
+ * internally, and it is useful to allow those to be invoked without switching
+ * SCREEN's, e.g., for multi-threaded applications.
+ */
+NCURSES_EXPORT(SCREEN *)
+_nc_screen_of(WINDOW *win)
+{
+    SCREEN *sp = 0;
+
+    if (win != 0) {
+	WINDOWLIST *wp = (WINDOWLIST *) win;
+	sp = wp->screen;
+    }
+    return (sp);
+}