simplistic screen swap-x patch

screen-swap-x.diff

diff -ur screen-4.0.3/display.c screen-4.0.3-swap-x/display.c
--- screen-4.0.3/display.c	2003-12-05 05:45:41.000000000 -0800
+++ screen-4.0.3-swap-x/display.c	2010-08-09 23:59:07.465303854 -0700
@@ -33,6 +33,8 @@
 #include "extern.h"
 #include "braille.h"
 
+int swap_x = 1;
+
 static int  CountChars __P((int));
 static int  DoAddChar __P((int));
 static int  BlankResize __P((int, int));
@@ -1197,7 +1199,7 @@
 
 
 void
-GotoPos(x2, y2)
+RealGotoPos(x2, y2)
 int x2, y2;
 {
   register int dy, dx, x1, y1;
@@ -1396,6 +1398,16 @@
 }
 
 void
+GotoPos(x2, y2)
+int x2, y2;
+{
+   if (swap_x) 
+     x2 = D_width - x2 - 1;
+   return RealGotoPos(x2, y2);
+}
+
+
+void
 ClearAll()
 {
   ASSERT(display);
@@ -1452,14 +1464,14 @@
        */
       if (D_CD && (y1 < y2 || !D_CE))
 	{
-	  GotoPos(x1, y1);
+	  RealGotoPos(x1, y1);
 	  AddCStr(D_CD);
 	  return;
 	}
     }
   if (x1 == 0 && xs == 0 && (xe == D_width - 1 || y1 == y2) && y1 == 0 && D_CCD && (!bce || D_BE))
     {
-      GotoPos(x1, y1);
+      RealGotoPos(x1, y1);
       AddCStr(D_CCD);
       return;
     }
@@ -1470,13 +1482,13 @@
 	xxe = x2;
       if (x1 == 0 && D_CB && (xxe != D_width - 1 || (D_x == xxe && D_y == y)) && (!bce || D_BE))
 	{
-	  GotoPos(xxe, y);
+	  RealGotoPos(xxe, y);
 	  AddCStr(D_CB);
 	  continue;
 	}
       if (xxe == D_width - 1 && D_CE && (!bce || D_BE))
 	{
-	  GotoPos(x1, y);
+	  RealGotoPos(x1, y);
 	  AddCStr(D_CE);
 	  continue;
 	}
@@ -2278,7 +2290,7 @@
     {
       D_status = STATUS_ON_WIN;
       debug1("using STATLINE %d\n", STATLINE);
-      GotoPos(0, STATLINE);
+      RealGotoPos(0, STATLINE);
       SetRendition(&mchar_so);
       InsertMode(0);
       AddStr(msg);
@@ -2420,7 +2432,7 @@
       l = strlen(str);
       if (l > D_width)
 	l = D_width;
-      GotoPos(0, D_height - 1);
+      RealGotoPos(0, D_height - 1);
       SetRendition(captionalways || D_cvlist == 0 || D_cvlist->c_next ? &mchar_null: &mchar_so);
       if (!PutWinMsg(str, 0, l))
         for (i = 0; i < l; i++)
@@ -2431,7 +2443,7 @@
       if (l < D_width)
         ClearArea(l, D_height - 1, l, D_width - 1, D_width - 1, D_height - 1, 0, 0);
       if (ox != -1 && oy != -1)
-	GotoPos(ox, oy);
+	RealGotoPos(ox, oy);
       D_hstatus = *str ? 1 : 0;
       SetRendition(&mchar_null);
     }
diff -ur screen-4.0.3/display.h screen-4.0.3-swap-x/display.h
--- screen-4.0.3/display.h	2003-07-01 07:01:42.000000000 -0700
+++ screen-4.0.3-swap-x/display.h	2010-08-09 23:12:39.664303465 -0700
@@ -343,3 +343,5 @@
 #define HSTATUS_MESSAGE		2
 #define HSTATUS_HS		3
 #define HSTATUS_ALWAYS		(1<<2)
+
+extern int swap_x;
diff -ur screen-4.0.3/pty.c screen-4.0.3-swap-x/pty.c
--- screen-4.0.3/pty.c	2003-09-08 07:26:18.000000000 -0700
+++ screen-4.0.3-swap-x/pty.c	2010-08-09 21:46:45.970972000 -0700
@@ -35,7 +35,7 @@
 
 /* for solaris 2.1, Unixware (SVR4.2) and possibly others */
 #ifdef HAVE_SVR4_PTYS
-# include <sys/stropts.h>
+/* # include <sys/stropts.h> */
 #endif
 
 #if defined(sun) && defined(LOCKPTY) && !defined(TIOCEXCL)
diff -ur screen-4.0.3/screen.c screen-4.0.3-swap-x/screen.c
--- screen-4.0.3/screen.c	2003-09-08 07:26:41.000000000 -0700
+++ screen-4.0.3-swap-x/screen.c	2010-08-09 23:28:35.402303972 -0700
@@ -135,6 +135,7 @@
 static struct passwd *getpwbyname __P((char *, struct passwd *));
 static void  SigChldHandler __P((void));
 static sigret_t SigChld __P(SIGPROTOARG);
+static sigret_t SigPwr __P(SIGPROTOARG);
 static sigret_t SigInt __P(SIGPROTOARG);
 static sigret_t CoreDump __P(SIGPROTOARG);
 static sigret_t FinitHandler __P(SIGPROTOARG);
@@ -1291,6 +1292,7 @@
   MakeNewEnv();
   signal(SIGHUP, SigHup);
   signal(SIGINT, FinitHandler);
+  signal(SIGPWR, SigPwr);
   signal(SIGQUIT, FinitHandler);
   signal(SIGTERM, FinitHandler);
 #ifdef BSDJOBS
@@ -1450,6 +1452,14 @@
   SIGRETURN;
 }
 
+static sigret_t
+SigPwr SIGDEFARG
+{
+   swap_x = !swap_x;
+   signal(SIGPWR, SigPwr);
+   SIGRETURN;
+}
+
 /* 
  * the backend's Interrupt handler
  * we cannot insert the intrc directly, as we never know