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/*
This file is part of GNUnet.
Copyright (C) 2012 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
GNUnet 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
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file src/regex/perf-regex.c
* @brief Test how long it takes to create a automaton from a string regex.
* @author Bartlomiej Polot
*/
#include <regex.h>
#include <time.h>
#include "platform.h"
#include "regex_internal_lib.h"
#include "regex_test_lib.h"
/**
* Print information about the given node and its edges
* to stdout.
*
* @param cls closure, unused.
* @param key hash for current state.
* @param proof proof for current state.
* @param accepting GNUNET_YES if this is an accepting state, GNUNET_NO if not.
* @param num_edges number of edges leaving current state.
* @param edges edges leaving current state.
*/
static void
print_edge (void *cls,
const struct GNUNET_HashCode *key,
const char *proof,
int accepting,
unsigned int num_edges,
const struct REGEX_BLOCK_Edge *edges)
{
unsigned int i;
printf ("%s: %s, proof: `%s'\n",
GNUNET_h2s (key),
accepting ? "ACCEPTING" : "",
proof);
for (i = 0; i < num_edges; i++)
printf (" `%s': %s\n",
edges[i].label,
GNUNET_h2s (&edges[i].destination));
}
/**
* The main function of the regex performace test.
*
* Read a set of regex from a file, combine them and create a DFA from the
* resulting combined regex.
*
* @param argc number of arguments from the command line
* @param argv command line arguments
* @return 0 ok, 1 on error
*/
int
main (int argc, char *const *argv)
{
struct REGEX_INTERNAL_Automaton* dfa;
char **regexes;
char *buffer;
char *regex;
int compression;
unsigned int alphabet_size;
long size;
GNUNET_log_setup ("perf-regex", "DEBUG", NULL);
if (4 != argc)
{
fprintf (stderr,
"Usage: %s REGEX_FILE ALPHABET_SIZE COMPRESSION\n",
argv[0]);
return 1;
}
regexes = REGEX_TEST_read_from_file (argv[1]);
if (NULL == regexes)
{
fprintf (stderr,
"Failed to read regexes from `%s'\n",
argv[1]);
return 2;
}
alphabet_size = atoi (argv[2]);
compression = atoi (argv[3]);
printf ("********* PERF-REGEX *********'\n");
printf ("Using:\n file '%s'\n Alphabet size %u\n compression %d\n",
argv[1], alphabet_size, compression);
fflush(stdout);
buffer = REGEX_TEST_combine (regexes, alphabet_size);
GNUNET_asprintf (®ex, "GNUNET_REGEX_PROFILER_(%s)(0|1)*", buffer);
size = strlen (regex);
fprintf (stderr,
"Combined regex (%ld bytes):\n%s\n",
size,
regex);
dfa = REGEX_INTERNAL_construct_dfa (regex, size, compression);
printf ("********* ALL EDGES *********'\n");
REGEX_INTERNAL_iterate_all_edges (dfa, &print_edge, NULL);
printf ("\n\n********* REACHABLE EDGES *********'\n");
REGEX_INTERNAL_iterate_reachable_edges (dfa, &print_edge, NULL);
REGEX_INTERNAL_automaton_destroy (dfa);
GNUNET_free (buffer);
REGEX_TEST_free_from_file (regexes);
GNUNET_free (regex);
return 0;
}
/* end of prof-regex.c */
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