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/* Driver program for the Perfect hash function generator.
Copyright (C) 1989 Free Software Foundation, Inc.
written by Douglas C. Schmidt (schmidt@ics.uci.edu)
This file is part of GNU GPERF.
GNU GPERF 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 1, or (at your option)
any later version.
GNU GPERF 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 GNU GPERF; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Simple driver program for the Perfect.hash function generator.
Most of the hard work is done in class Perfect and its class methods. */
#include <stdio.h>
#include <sys/types.h>
#include <time.h>
#include "stderr.h"
#include "options.h"
#include "perfect.h"
/* Calls the appropriate intialization routines for each
ADT. Note that certain initialization routines require
initialization *after* certain values are computed. Therefore,
they cannot be called here. */
static void
init_all (argc, argv)
int argc;
char *argv[];
{
#ifdef RLIMIT_STACK
/* Get rid of any avoidable limit on stack size. */
{
struct rlimit rlim;
/* Set the stack limit huge so that alloca does not fail. */
getrlimit (RLIMIT_STACK, &rlim);
rlim.rlim_cur = rlim.rlim_max;
setrlimit (RLIMIT_STACK, &rlim);
}
#endif /* RLIMIT_STACK */
options_init (argc, argv);
key_list_init ();
perfect_init ();
}
/* Calls appropriate destruction routines for each ADT. These
routines print diagnostics if the debugging option is enabled. */
static void
destroy_all ()
{
options_destroy ();
key_list_destroy ();
perfect_destroy ();
}
/* Driver for perfect hash function generation. */
int
main (argc, argv)
int argc;
char *argv[];
{
struct tm *tm;
time_t clock;
int status;
time (&clock);
tm = localtime (&clock);
fprintf (stderr, "/* starting time is %d:%d:%d */\n", tm->tm_hour, tm->tm_min, tm->tm_sec);
/* Sets the options. */
init_all (argc, argv);
/* Generates the perfect hash table.
Also prints generated code neatly to the output. */
status = perfect_generate ();
destroy_all ();
time (&clock);
tm = localtime (&clock);
fprintf (stderr, "/* ending time is %d:%d:%d */\n", tm->tm_hour, tm->tm_min, tm->tm_sec);
return status;
}
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