1 files changed, 55 insertions, 0 deletions
diff --git a/dmake/msdos/switchar.c b/dmake/msdos/switchar.c
new file mode 100644
index 000000000000..8879a9ad7c44
--- /dev/null
+++ b/dmake/msdos/switchar.c
@@ -0,0 +1,55 @@
+/* RCS  $Id: switchar.c,v 1.1.1.1 2000-09-22 15:33:27 hr Exp $
+--
+-- SYNOPSIS
+--      switch char query.
+--
+-- DESCRIPTION
+--      Get the current value of the command line switch char.  Only useful
+--      in a DOS environment, otherwise we #define it to be '-'.
+--
+-- AUTHOR
+--      Dennis Vadura, dvadura@dmake.wticorp.com
+--
+-- WWW
+--      http://dmake.wticorp.com/
+--
+-- COPYRIGHT
+--      Copyright (c) 1996,1997 by WTI Corp.  All rights reserved.
+--
+--      This program is NOT free software; you can redistribute it and/or
+--      modify it under the terms of the Software License Agreement Provided
+--      in the file <distribution-root>/readme/license.txt.
+--
+-- LOG
+--      Use cvs log to obtain detailed change logs.
+*/
+#if defined(_MSC_VER)
+#include <stdlib.h>
+#endif
+#include <dos.h>
+#include <stdio.h>
+#include "stdmacs.h"
+
+getswitchar()/*
+===============
+   Try the environment first.  If you don't find SWITCHAR there, then use
+   the DOS call.  The call is undocumented, and doesn't work for DOS versions
+   4.0 and up, so the check of the environment will fix that. */
+{
+#if defined(__MSDOS__) || defined(M_I86)
+   union REGS rg;
+   static char *_env_switchar = NIL(char);
+
+   if( _env_switchar != NIL(char) ||
+       (_env_switchar = (char *)getenv("SWITCHAR")) != NIL(char) )
+      return(*_env_switchar);
+
+   rg.h.ah = 0x37;      /* switch char request */
+   rg.h.al = 0;         /* get (not set) */
+
+   intdos(&rg, &rg);
+   return (rg.h.dl);
+#endif /* M_I86 */
+
+   return ('-');
+}