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/*
* Copyright (c) 2015, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/** \file
* \brief State for corpus generator.
*/
#include "config.h"
#include "ng_corpus_properties.h"
#include "ue2common.h"
#include <boost/random/uniform_int_distribution.hpp>
// default constructor
CorpusProperties::CorpusProperties()
: matchness(100), unmatchness(0), randomness(0), prefixRange(0, 0),
suffixRange(0, 0), cycleMin(1), cycleMax(1),
corpusLimit(DEFAULT_CORPUS_GENERATOR_LIMIT), editDistance(0),
alphabetSize(~0), rngSeed(0) {
// empty
}
bool CorpusProperties::setPercentages(unsigned int match, unsigned int unmatch,
unsigned int random) {
if (match + unmatch + random != 100) {
// Do not update probabilities
return false;
}
matchness = match;
unmatchness = unmatch;
randomness = random;
return true;
}
void CorpusProperties::seed(unsigned val) {
rngSeed = val;
randomGen.seed(val);
}
unsigned CorpusProperties::getSeed() const {
return rngSeed;
}
unsigned CorpusProperties::rand(unsigned n, unsigned m) {
boost::random::uniform_int_distribution<> dist(n, m);
return dist(randomGen);
}
// not const because it stores state for the random number generator
CorpusProperties::RollResult CorpusProperties::throwDice() {
if (matchness == 100) {
return ROLLED_MATCH;
}
if (unmatchness == 100) {
return ROLLED_UNMATCH;
}
if (randomness == 100) {
return ROLLED_RANDOM;
}
// This assumes a uniform distribution. Perhaps factor some 'depth' param
// and whether this 'depth' should increase or decrease the likelihood of
// unmatch or random rolls.
unsigned int outcome = rand(0, 99);
if (outcome < matchness) {
return ROLLED_MATCH;
}
if (outcome < matchness + unmatchness) {
return ROLLED_UNMATCH;
}
return ROLLED_RANDOM;
}
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