BSD 4_3_Net_2 release

[unix-history] / usr / src / lib / libcurses / overwrite.c

diff --git a/usr/src/lib/libcurses/overwrite.c b/usr/src/lib/libcurses/overwrite.c
index e8fa220..c885ab3 100644 (file)
--- a/usr/src/lib/libcurses/overwrite.c
+++ b/usr/src/lib/libcurses/overwrite.c
@@ -1,26 +1,72 @@
-# include      "curses.h"
+/*
+ * Copyright (c) 1981 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by the University of
+ *     California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)overwrite.c        5.4 (Berkeley) 6/1/90";
+#endif /* not lint */
+
+# include      "curses.ext"
+# include      <ctype.h>

 
 # define       min(a,b)        (a < b ? a : b)
 
 # define       min(a,b)        (a < b ? a : b)

+# define       max(a,b)        (a > b ? a : b)

 
 /*
  *     This routine writes win1 on win2 destructively.
 
 /*
  *     This routine writes win1 on win2 destructively.

+ *

  */
 overwrite(win1, win2)
 reg WINDOW     *win1, *win2; {
 
  */
 overwrite(win1, win2)
 reg WINDOW     *win1, *win2; {
 

-       reg int         x, y, minx, miny, starty;
+       reg char        *sp, *end;
+       reg int         x, y, endy, endx, starty, startx;

 
 # ifdef DEBUG
 
 # ifdef DEBUG

-       fprintf(outf, "OVERWRITE(0%o, 0%o);\n", win1, win2);
+       fprintf(outf, "OVERWRITE(%0.2o, %0.2o);\n", win1, win2);

 # endif
 # endif

-       miny = min(win1->_maxy, win2->_maxy);
-       minx = min(win1->_maxx, win2->_maxx);
+       starty = max(win1->_begy, win2->_begy);
+       startx = max(win1->_begx, win2->_begx);
+       endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begx);
+       endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx);
+       if (starty >= endy || startx >= endx)
+               return;

 # ifdef DEBUG
 # ifdef DEBUG

-       fprintf(outf, "OVERWRITE:\tminx = %d,  miny = %d\n", minx, miny);
+       fprintf(outf, "OVERWRITE:from (%d,%d) to (%d,%d)\n", starty, startx, endy, endx);

 # endif
 # endif

-       starty = win1->_begy - win2->_begy;
-       for (y = 0; y < miny; y++)
-               if (wmove(win2, y + starty, 0) != ERR)
-                       for (x = 0; x < minx; x++)
-                               waddch(win2, win1->_y[y][x]);
+       x = endx - startx;
+       for (y = starty; y < endy; y++) {
+               bcopy(&win1->_y[y - win1->_begy][startx - win1->_begx],
+                     &win2->_y[y - win2->_begy][startx - win2->_begx], x);
+               touchline(win2, y, startx - win2->_begx, endx - win2->_begx);
+       }

 }
 }