ncurses 6.0 - patch 20180120

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

diff --git a/ncurses/base/wresize.c b/ncurses/base/wresize.c
index d5ce3974e278b0cab85edd147ca2a354a8c55012..bc6b5732ea41fe05aa46ed575c2db9af8d6b7389 100644 (file)
--- a/ncurses/base/wresize.c
+++ b/ncurses/base/wresize.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright (c) 1998-2008,2009 Free Software Foundation, Inc.              *
+ * Copyright (c) 1998-2010,2011 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            *
@@ -33,7 +33,7 @@
 
 #include <curses.priv.h>
 
-MODULE_ID("$Id: wresize.c,v 1.32 2009/10/24 22:15:00 tom Exp $")
+MODULE_ID("$Id: wresize.c,v 1.35 2011/05/21 18:55:07 tom Exp $")
 
 static int
 cleanup_lines(struct ldat *data, int length)
@@ -71,9 +71,9 @@ repair_subwindows(WINDOW *cmp)
                tst->_parx = cmp->_maxx;
 
            if (tst->_maxy + tst->_pary > cmp->_maxy)
-               tst->_maxy = cmp->_maxy - tst->_pary;
+               tst->_maxy = (NCURSES_SIZE_T) (cmp->_maxy - tst->_pary);
            if (tst->_maxx + tst->_parx > cmp->_maxx)
-               tst->_maxx = cmp->_maxx - tst->_parx;
+               tst->_maxx = (NCURSES_SIZE_T) (cmp->_maxx - tst->_parx);
 
            for (row = 0; row <= tst->_maxy; ++row) {
                tst->_line[row].text = &pline[tst->_pary + row].text[tst->_parx];
@@ -157,7 +157,8 @@ wresize(WINDOW *win, int ToLines, int ToCols)
        if (!(win->_flags & _SUBWIN)) {
            if (row <= size_y) {
                if (ToCols != size_x) {
-                   if ((s = typeMalloc(NCURSES_CH_T, ToCols + 1)) == 0)
+                   s = typeMalloc(NCURSES_CH_T, (unsigned) ToCols + 1);
+                   if (s == 0)
                        returnCode(cleanup_lines(new_lines, row));
                    for (col = 0; col <= ToCols; ++col) {
                        s[col] = (col <= size_x
@@ -168,13 +169,16 @@ wresize(WINDOW *win, int ToLines, int ToCols)
                    s = win->_line[row].text;
                }
            } else {
-               if ((s = typeMalloc(NCURSES_CH_T, ToCols + 1)) == 0)
+               s = typeMalloc(NCURSES_CH_T, (unsigned) ToCols + 1);
+               if (s == 0)
                    returnCode(cleanup_lines(new_lines, row));
                for (col = 0; col <= ToCols; ++col)
                    s[col] = win->_nc_bkgd;
            }
-       } else {
+       } else if (pline != 0 && pline[win->_pary + row].text != 0) {
            s = &pline[win->_pary + row].text[win->_parx];
+       } else {
+           s = 0;
        }
 
        if_USE_SCROLL_HINTS(new_lines[row].oldindex = row);
@@ -185,11 +189,11 @@ wresize(WINDOW *win, int ToLines, int ToCols)
        if ((ToCols != size_x) || (row > size_y)) {
            if (end >= begin) { /* growing */
                if (new_lines[row].firstchar < begin)
-                   new_lines[row].firstchar = begin;
+                   new_lines[row].firstchar = (NCURSES_SIZE_T) begin;
            } else {            /* shrinking */
                new_lines[row].firstchar = 0;
            }
-           new_lines[row].lastchar = ToCols;
+           new_lines[row].lastchar = (NCURSES_SIZE_T) ToCols;
        }
        new_lines[row].text = s;
     }
@@ -216,8 +220,8 @@ wresize(WINDOW *win, int ToLines, int ToCols)
      * Finally, adjust the parameters showing screen size and cursor
      * position:
      */
-    win->_maxx = ToCols;
-    win->_maxy = ToLines;
+    win->_maxx = (NCURSES_SIZE_T) ToCols;
+    win->_maxy = (NCURSES_SIZE_T) ToLines;
 
     if (win->_regtop > win->_maxy)
        win->_regtop = win->_maxy;