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https://github.com/wesnoth/wesnoth
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ba51524f6e
using this shell script: find src -type f -print0 | xargs -0 sed -i "s|Copyright (C) \([[:digit:]]*\)\([ ]*\)-\([ ]*\)2015|Copyright (C) \1\2-\32016|g"
70 lines
1.8 KiB
C++
70 lines
1.8 KiB
C++
/*
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Copyright (C) 2014 - 2016 by Chris Beck <render787@gmail.com>
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Part of the Battle for Wesnoth Project http://www.wesnoth.org/
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY.
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See the COPYING file for more details.
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*/
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/* This file selects a seed source -- "nondeterministic" random number
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generator in boost documentation. It should be a wrapper for
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boost::random_device on platforms where this is available, otherwise
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it should most likely be the system time.
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*/
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#include "seed_rng.hpp"
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#include <boost/version.hpp>
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/*****
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Use preprocessor tests to decide whether to try to include and
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use boost random device, or fallback to system time.
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*****/
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#define SEED_RNG_USE_BOOST_RANDOM_DEVICE
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//Boost does not support random device on windows before v 1.43.0
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//http://www.boost.org/users/history/version_1_43_0.html
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#if (defined(_WIN32) && (BOOST_VERSION < 104300))
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#undef SEED_RNG_USE_BOOST_RANDOM_DEVICE
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#endif
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/*****
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End preprocessor checks
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*****/
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#ifdef SEED_RNG_USE_BOOST_RANDOM_DEVICE
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#include <boost/nondet_random.hpp>
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#else
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#include <ctime>
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#endif
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#include <sstream>
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#include <iomanip>
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namespace seed_rng {
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uint32_t next_seed() {
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#ifdef SEED_RNG_USE_BOOST_RANDOM_DEVICE
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static boost::random_device rnd_;
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return rnd_();
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#else
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return static_cast<uint32_t> (std::time(0));
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#endif
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}
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std::string next_seed_str() {
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uint32_t random_seed_ = next_seed();
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std::stringstream stream;
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stream << std::setfill('0') << std::setw(sizeof(uint32_t)*2) << std::hex << random_seed_;
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return stream.str();
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}
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} //ends seed_rng namespace
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