Mercurial > hg > xemacs-beta
diff lib-src/make-dump-id.c @ 404:2f8bb876ab1d r21-2-32
Import from CVS: tag r21-2-32
author | cvs |
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date | Mon, 13 Aug 2007 11:16:07 +0200 |
parents | |
children | b8cc9ab3f761 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/lib-src/make-dump-id.c Mon Aug 13 11:16:07 2007 +0200 @@ -0,0 +1,59 @@ +/* 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" + +/* 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, + "#include <dump-id.h>\n" + "unsigned int dump_id = %uU;\n", + generate_dump_id ()); + + if ((fclose (f)) != 0) + { + perror ("close dump-id.c"); + return EXIT_FAILURE; + } + + return EXIT_SUCCESS; +}