ncurses 6.1 - patch 20191102

[ncurses.git] / ncurses / base / lib_addstr.c

diff --git a/ncurses/base/lib_addstr.c b/ncurses/base/lib_addstr.c
index d73ce00a4519a979853408412e30e76e94d142de..55dc440b0047995f65af7005021b5cce52682759 100644 (file)
--- a/ncurses/base/lib_addstr.c
+++ b/ncurses/base/lib_addstr.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright (c) 1998-2009,2010 Free Software Foundation, Inc.              *
+ * Copyright (c) 1998-2017,2019 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            *
@@ -44,7 +44,7 @@
 
 #include <curses.priv.h>
 
-MODULE_ID("$Id: lib_addstr.c,v 1.51 2010/12/19 01:22:58 tom Exp $")
+MODULE_ID("$Id: lib_addstr.c,v 1.55 2019/05/04 20:46:24 tom Exp $")
 
 NCURSES_EXPORT(int)
 waddnstr(WINDOW *win, const char *astr, int n)
@@ -87,7 +87,7 @@ waddchnstr(WINDOW *win, const chtype *astr, int n)
 
     T((T_CALLED("waddchnstr(%p,%p,%d)"), (void *) win, (const void *) astr, n));
 
-    if (!win)
+    if (!win || !astr)
        returnCode(ERR);
 
     y = win->_cury;
@@ -119,8 +119,10 @@ NCURSES_EXPORT(int)
 _nc_wchstrlen(const cchar_t *s)
 {
     int result = 0;
-    while (CharOf(s[result]) != L'\0') {
-       result++;
+    if (s != 0) {
+       while (CharOf(s[result]) != L'\0') {
+           result++;
+       }
     }
     return result;
 }
@@ -181,7 +183,7 @@ wadd_wchnstr(WINDOW *win, const cchar_t *astr, int n)
        if (isWidecExt(astr[i]))
            continue;
 
-       len = wcwidth(CharOf(astr[i]));
+       len = _nc_wacs_width(CharOf(astr[i]));
 
        if (x + len - 1 <= win->_maxx) {
            line->text[x] = _nc_render(win, astr[i]);
@@ -192,6 +194,8 @@ wadd_wchnstr(WINDOW *win, const cchar_t *astr, int n)
                    }
                    SetWidecExt(line->text[x + j], j);
                }
+           } else {
+               len = 1;
            }
            x = (NCURSES_SIZE_T) (x + len);
            end += len - 1;