This commit was manufactured by cvs2svn to create branch 'chise-r21-4-18'.

[chise/xemacs-chise.git-] / lib-src / make-dump-id.c

diff --git a/lib-src/make-dump-id.c b/lib-src/make-dump-id.c
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+/* Generate a unique dump-id for use with the portable dumper.
+   Copyright (C) 2000 Olivier Galibert, Martin Buchholz
+
+This file is part of XEmacs.
+
+XEmacs is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+XEmacs is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with XEmacs; see the file COPYING.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "../src/systime.h"
+
+#ifdef WIN32_NATIVE
+#include <sys/timeb.h>
+
+/* Emulate gettimeofday (Ulrich Leodolter, 1/11/95).  */
+void 
+gettimeofday (struct timeval *tv, struct timezone *tz)
+{
+  struct _timeb tb;
+  _ftime (&tb);
+
+  tv->tv_sec = tb.time;
+  tv->tv_usec = tb.millitm * 1000L;
+  if (tz) 
+    {
+      tz->tz_minuteswest = tb.timezone;        /* minutes west of Greenwich  */
+      tz->tz_dsttime = tb.dstflag;     /* type of dst correction  */
+    }
+}
+#endif
+
+/* Generates an (extremely) pseudo random number for the dump-id */
+static unsigned int
+generate_dump_id (void)
+{
+  EMACS_TIME thyme;
+  EMACS_GET_TIME (thyme);
+
+  return (unsigned int) (EMACS_SECS (thyme) ^ EMACS_USECS (thyme));
+}
+
+int
+main (int argc, char *argv[])
+{
+  FILE *f;
+
+  if ((f = fopen ("dump-id.c", "w")) == NULL)
+    {
+      perror ("open dump-id.c");
+      return EXIT_FAILURE;
+    }
+
+  fprintf (f, "unsigned int dump_id = %uU;\n", generate_dump_id ());
+
+  if ((fclose (f)) != 0)
+    {
+      perror ("close dump-id.c");
+      return EXIT_FAILURE;
+    }
+
+  return EXIT_SUCCESS;
+}