Miscellaneous code cleaning

- add <stdarg.h> or <varargs.h> in snprintf.h
  and remove those inclusions in the other #ifdef NEED_SNPRINTF_H codes

- remove the check of multiple inclusions in source (.c)  code
  (there is a bit loss of _cpp_ performance, but I prefer the gain of
   code reading and maintenance; and nowadays, disk caches and VM are
   correctly optimized ;-).

- protect all (well almost) header files against multiple inclusions

- add header (i.e. GPL license) in some include files

- reorganize a bit the way header files are included:

  First:
  #include <system_include_files>
  #include <external_package_include_files (e.g. gtk, glib etc.)>
  Then
  #include "ethereal_include_files"

  with the correct HAVE_XXX or NEED_XXX protections.

- add some HAVE_XXX checks before including some system header files

- add the same HAVE_XXX in wiretap as in ethereal

Please forgive me, if I break something (I've only compiled and regression
tested on Linux).

svn path=/trunk/; revision=2254

1 files changed, 6 insertions, 1 deletions

diff --git a/xdlc.h b/xdlc.h
index ff7312077b..8190cda239 100644
--- a/xdlc.h
+++ b/xdlc.h
@@ -2,7 +2,7 @@
  * Define *DLC frame types, and routine to dissect the control field of
  * a *DLC frame.
  *
- * $Id: xdlc.h,v 1.13 2000/05/31 03:58:56 gram Exp $
+ * $Id: xdlc.h,v 1.14 2000/08/11 13:33:50 deniel Exp $
  *
  * Ethereal - Network traffic analyzer
  * By Gerald Combs <gerald@zing.org>
@@ -24,6 +24,9 @@
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
 
+#ifndef __XDLC_H__
+#define __XDLC_H__
+
 /*
  * Low-order bits of first (extended) or only (basic) octet of control
  * field, specifying the frame type.
@@ -82,3 +85,5 @@ int get_xdlc_control(const u_char *pd, int offset, int is_response,
 int dissect_xdlc_control(tvbuff_t *tvb, int offset, packet_info *pinfo,
   proto_tree *xdlc_tree, int hf_xdlc_control, gint ett_xdlc_control,
   int is_response, int extended);
+
+#endif