1 files changed, 87 insertions, 0 deletions
diff --git a/contrib/nvi/ip/ip_screen.c b/contrib/nvi/ip/ip_screen.c
new file mode 100644
index 000000000000..71578e0d1b39
--- /dev/null
+++ b/contrib/nvi/ip/ip_screen.c
@@ -0,0 +1,87 @@
+/*-
+ * Copyright (c) 1996
+ *	Keith Bostic.  All rights reserved.
+ *
+ * See the LICENSE file for redistribution information.
+ */
+
+#include "config.h"
+
+#ifndef lint
+static const char sccsid[] = "@(#)ip_screen.c	8.2 (Berkeley) 10/13/96";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/queue.h>
+
+#include <bitstring.h>
+#include <stdio.h>
+
+#include "../common/common.h"
+#include "ip.h"
+
+/*
+ * ip_screen --
+ *	Initialize/shutdown the IP screen.
+ *
+ * PUBLIC: int ip_screen __P((SCR *, u_int32_t));
+ */
+int
+ip_screen(sp, flags)
+	SCR *sp;
+	u_int32_t flags;
+{
+	GS *gp;
+	IP_PRIVATE *ipp;
+
+	gp = sp->gp;
+	ipp = IPP(sp);
+
+	/* See if the current information is incorrect. */
+	if (F_ISSET(gp, G_SRESTART)) {
+		if (ip_quit(gp))
+			return (1);
+		F_CLR(gp, G_SRESTART);
+	}
+	
+	/* See if we're already in the right mode. */
+	if (LF_ISSET(SC_VI) && F_ISSET(ipp, IP_SCR_VI_INIT))
+		return (0);
+
+	/* Ex isn't possible. */
+	if (LF_ISSET(SC_EX))
+		return (1);
+
+	/* Initialize terminal based information. */
+	if (ip_term_init(sp)) 
+		return (1);
+
+	/* Put up the first file name. */
+	if (ip_rename(sp))
+		return (1);
+
+	F_SET(ipp, IP_SCR_VI_INIT);
+	return (0);
+}
+
+/*
+ * ip_quit --
+ *	Shutdown the screens.
+ *
+ * PUBLIC: int ip_quit __P((GS *));
+ */
+int
+ip_quit(gp)
+	GS *gp;
+{
+	IP_PRIVATE *ipp;
+	int rval;
+
+	/* Clean up the terminal mappings. */
+	rval = ip_term_end(gp);
+
+	ipp = GIPP(gp);
+	F_CLR(ipp, IP_SCR_VI_INIT);
+
+	return (rval);
+}