X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=ncurses%2Fbase%2Flib_addch.c;h=604b13be8cec16bab2f9242b0006ffe988455b06;hp=ae130ff023746ba81ffce533b140f268878296ee;hb=c976a90788f3e50afc773670ff74c5270ecb48df;hpb=690589d8f19e38925db061296d4f704e4a965bb2

diff --git a/ncurses/base/lib_addch.c b/ncurses/base/lib_addch.c
index ae130ff0..604b13be 100644
--- a/ncurses/base/lib_addch.c
+++ b/ncurses/base/lib_addch.c
@@ -1,5 +1,6 @@
 /****************************************************************************
- * Copyright (c) 1998-2016,2017 Free Software Foundation, Inc.              *
+ * Copyright 2019,2020 Thomas E. Dickey                                     *
+ * Copyright 1998-2016,2017 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            *
@@ -36,7 +37,7 @@
 #include <curses.priv.h>
 #include <ctype.h>
 
-MODULE_ID("$Id: lib_addch.c,v 1.131 2017/07/29 20:42:02 tom Exp $")
+MODULE_ID("$Id: lib_addch.c,v 1.134 2020/02/02 23:34:34 tom Exp $")
 
 static const NCURSES_CH_T blankchar = NewChar(BLANK_TEXT);
 
@@ -125,7 +126,7 @@ newline_forces_scroll(WINDOW *win, NCURSES_SIZE_T *ypos)
 	if (*ypos == win->_regbottom) {
 	    *ypos = win->_regbottom;
 	    result = TRUE;
-	} else {
+	} else if (*ypos < win->_maxy) {
 	    *ypos = (NCURSES_SIZE_T) (*ypos + 1);
 	}
     } else if (*ypos < win->_maxy) {
@@ -303,7 +304,7 @@ waddch_literal(WINDOW *win, NCURSES_CH_T ch)
      * adjustments.
      */
     if_WIDEC({
-	int len = wcwidth(CharOf(ch));
+	int len = _nc_wacs_width(CharOf(ch));
 	int i;
 	int j;
 	wchar_t *chars;
@@ -343,6 +344,7 @@ waddch_literal(WINDOW *win, NCURSES_CH_T ch)
 		    return ERR;
 		x = win->_curx;
 		y = win->_cury;
+		CHECK_POSITION(win, x, y);
 		line = win->_line + y;
 	    }
 	    /*
@@ -447,6 +449,7 @@ waddch_nosync(WINDOW *win, const NCURSES_CH_T ch)
      */
     x = win->_curx;
     y = win->_cury;
+    CHECK_POSITION(win, x, y);
 
     switch (t) {
     case '\t':