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AbsRndNumGenerator.cpp
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116 lines (97 loc) · 3.41 KB
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// -*- mode: C++ -*-
//
// Copyright (c) 2007, 2008, 2009, 2010, 2011, 2015, 2017 The University of Utah
// All rights reserved.
//
// This file is part of `csmith', a random generator of C programs.
//
// 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.
//
// 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.
#include <config.h>
#include "AbsRndNumGenerator.h"
#include <cassert>
#include <cstdlib>
#include <iostream>
#include "DFSRndNumGenerator.h"
#include "DefaultRndNumGenerator.h"
using namespace std;
#ifndef HAVE_LRAND48
extern "C" {
extern void srand48(long seed);
extern long lrand48(void);
}
#endif
const char *AbsRndNumGenerator::hex1 = "0123456789ABCDEF";
const char *AbsRndNumGenerator::dec1 = "0123456789";
AbsRndNumGenerator::AbsRndNumGenerator() {
// Nothing to do
}
AbsRndNumGenerator::~AbsRndNumGenerator() {
// Nothing to do
}
/*
* Factory method to create random number generators.
*/
AbsRndNumGenerator *
AbsRndNumGenerator::make_rndnum_generator(RNDNUM_GENERATOR impl,
const unsigned long seed) {
AbsRndNumGenerator *rImpl = 0;
AbsRndNumGenerator::seedrand(seed);
switch (impl) {
case RNDNUM_GENERATOR::rDefaultRndNumGenerator:
rImpl = DefaultRndNumGenerator::make_rndnum_generator(seed);
break;
case RNDNUM_GENERATOR::rDFSRndNumGenerator:
rImpl = DFSRndNumGenerator::make_rndnum_generator();
break;
default:
assert(!"unknown random generator");
break;
}
return rImpl;
}
void AbsRndNumGenerator::seedrand(const unsigned long seed) {
#ifdef HAVE_SRAND48_DETERMINISTIC
// OpenBSD requires a special call to activate the standard,
// deterministic behavior of `lrand48'.
srand48_deterministic(seed);
#else
srand48(seed);
#endif
}
unsigned long AbsRndNumGenerator::genrand(void) { return lrand48(); }
std::string AbsRndNumGenerator::RandomHexDigits(int num) {
std::string str;
while (num--) {
str += hex1[genrand() % 16];
}
return str;
}
std::string AbsRndNumGenerator::RandomDigits(int num) {
std::string str;
while (num--) {
str += dec1[genrand() % 10];
}
return str;
}
const char *AbsRndNumGenerator::get_hex1() { return AbsRndNumGenerator::hex1; }
const char *AbsRndNumGenerator::get_dec1() { return AbsRndNumGenerator::dec1; }