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Merging from branches/v0.5-peernet/libbitdht (--- Merging r4354 through r4356 into '.')

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* adding Bloom filter to speed up finding RS peers.
 * fixed startup bug. (loops into FAILURE)




git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@4357 b45a01b8-16f6-495d-af2f-9b41ad6348cc
This commit is contained in:
drbob 2011-06-29 16:06:33 +00:00
parent 702ff44194
commit 79b48d5a89
15 changed files with 820 additions and 21 deletions
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91
libbitdht/src/tests/bdbloom_makefilter.cc Normal file
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/*
* bitdht/bdbloom_test.cc
*
* BitDHT: An Flexible DHT library.
*
* Copyright 2010 by Robert Fernie
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License Version 3 as published by the Free Software Foundation.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*
* Please report all bugs and problems to "bitdht@lunamutt.com".
*
*/
#include "util/bdbloom.h"
#include "bitdht/bdstddht.h"
#include <iostream>
#include <sstream>
#define N_TESTS 100
int main(int argc, char **argv)
{
/* read from the file */
if (argc < 2)
{
std::cerr << "Missing Hash File";
std::cerr << std::endl;
}
FILE *fd = fopen(argv[1], "r");
if (!fd)
{
std::cerr << "Failed to Open File: " << argv[1];
std::cerr << std::endl;
return 1;
}
char line[1000];
bdBloom filter;
int nHashes = 0;
while(fgets(line, 1000-1, fd))
{
std::string hash = line;
std::cerr << "Read Hash: " << hash;
std::cerr << std::endl;
filter.add(hash);
nHashes++;
}
fclose(fd);
filter.printFilter(std::cerr);
int bits = filter.countBits();
int filterBits = filter.filterBits();
std::cerr << "Filter Bits Set: " << bits;
std::cerr << std::endl;
double possible = ((double) bits) * bits;
double max = ((double) filterBits) * filterBits;
std::cerr << "Therefore Possible Finds: " << possible << "/" << max << " = %" << 100 * possible / max;
std::cerr << std::endl;
std::cerr << "With Insertions: " << nHashes;
std::cerr << std::endl;
std::cerr << std::endl;
std::cerr << std::endl;
std::cerr << "Filter String: " << filter.getFilter() << std::endl;
std::cerr << std::endl;
std::cerr << std::endl;
return 1;
}