Base version of ncurses-5.7 library
diff --git a/ncurses/base/lib_slkrefr.c b/ncurses/base/lib_slkrefr.c
new file mode 100644
index 0000000..cb1beba
--- /dev/null
+++ b/ncurses/base/lib_slkrefr.c
@@ -0,0 +1,144 @@
+/****************************************************************************
+ * Copyright (c) 1998-2006,2008 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: Juergen Pfeifer                         1996-on                 *
+ *     and: Thomas E. Dickey                                                *
+ ****************************************************************************/
+
+/*
+ *	lib_slkrefr.c
+ *	Write SLK window to the (virtual) screen.
+ */
+#include <curses.priv.h>
+#include <term.h>		/* num_labels, label_*, plab_norm */
+
+MODULE_ID("$Id: lib_slkrefr.c,v 1.17 2008/09/27 14:07:53 juergen Exp $")
+
+/*
+ * Paint the info line for the PC style SLK emulation.
+ */
+static void
+slk_paint_info(WINDOW *win)
+{
+    SCREEN *sp = _nc_screen_of(win);
+
+    if (win && sp && (sp->slk_format == 4)) {
+	int i;
+
+	mvwhline(win, 0, 0, 0, getmaxx(win));
+	wmove(win, 0, 0);
+
+	for (i = 0; i < sp->_slk->maxlab; i++) {
+	    mvwprintw(win, 0, sp->_slk->ent[i].ent_x, "F%d", i + 1);
+	}
+    }
+}
+
+/*
+ * Write the soft labels to the soft-key window.
+ */
+static void
+slk_intern_refresh(SLK * slk)
+{
+    int i;
+    int fmt = SP->slk_format;
+
+    for (i = 0; i < slk->labcnt; i++) {
+	if (slk->dirty || slk->ent[i].dirty) {
+	    if (slk->ent[i].visible) {
+		if (num_labels > 0 && SLK_STDFMT(fmt)) {
+		    if (i < num_labels) {
+			TPUTS_TRACE("plab_norm");
+			putp(TPARM_2(plab_norm, i + 1, slk->ent[i].form_text));
+		    }
+		} else {
+		    if (fmt == 4)
+			slk_paint_info(slk->win);
+		    wmove(slk->win, SLK_LINES(fmt) - 1, slk->ent[i].ent_x);
+		    if (SP->_slk) {
+			wattrset(slk->win, AttrOf(SP->_slk->attr));
+		    }
+		    waddstr(slk->win, slk->ent[i].form_text);
+		    /* if we simulate SLK's, it's looking much more
+		       natural to use the current ATTRIBUTE also
+		       for the label window */
+		    wattrset(slk->win, WINDOW_ATTRS(stdscr));
+		}
+	    }
+	    slk->ent[i].dirty = FALSE;
+	}
+    }
+    slk->dirty = FALSE;
+
+    if (num_labels > 0) {
+	if (slk->hidden) {
+	    TPUTS_TRACE("label_off");
+	    putp(label_off);
+	} else {
+	    TPUTS_TRACE("label_on");
+	    putp(label_on);
+	}
+    }
+}
+
+/*
+ * Refresh the soft labels.
+ */
+NCURSES_EXPORT(int)
+slk_noutrefresh(void)
+{
+    T((T_CALLED("slk_noutrefresh()")));
+
+    if (SP == NULL || SP->_slk == NULL)
+	returnCode(ERR);
+    if (SP->_slk->hidden)
+	returnCode(OK);
+    slk_intern_refresh(SP->_slk);
+
+    returnCode(wnoutrefresh(SP->_slk->win));
+}
+
+/*
+ * Refresh the soft labels.
+ */
+NCURSES_EXPORT(int)
+slk_refresh(void)
+{
+    T((T_CALLED("slk_refresh()")));
+
+    if (SP == NULL || SP->_slk == NULL)
+	returnCode(ERR);
+    if (SP->_slk->hidden)
+	returnCode(OK);
+    slk_intern_refresh(SP->_slk);
+
+    returnCode(wrefresh(SP->_slk->win));
+}