81f146f648
* spot/kripke/kripkegraph.hh, spot/misc/hash.hh, spot/twa/taatgba.cc, spot/twa/twagraph.hh, tests/core/ngraph.cc: Replace subtraction of pointeur minus nullptr by an explicit cast to size_t. * spot/twa/acc.hh: Add explicit default copy assignment operator for rs_pair.
135 lines
4.8 KiB
C++
135 lines
4.8 KiB
C++
// -*- coding: utf-8 -*-
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// Copyright (C) 2008, 2011, 2014, 2015-2018, 2021 Laboratoire de
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// Recherche et Développement de l'Epita (LRDE).
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// Copyright (C) 2003, 2004, 2005 Laboratoire d'Informatique de
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// Paris 6 (LIP6), département Systèmes Répartis Coopératifs (SRC),
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// Université Pierre et Marie Curie.
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//
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// This file is part of Spot, a model checking library.
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//
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// Spot is free software; you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3 of the License, or
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// (at your option) any later version.
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//
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// Spot is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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// License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#pragma once
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#include <climits>
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#include <string>
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#include <functional>
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#include <spot/misc/hashfunc.hh>
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#include <unordered_map>
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#include <unordered_set>
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namespace spot
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{
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/// \ingroup hash_funcs
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/// \brief A hash function for pointers.
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template <class T>
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struct ptr_hash :
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public std::unary_function<const T*, size_t>
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{
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// A default constructor is needed if the ptr_hash object is
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// stored in a const member. This occur with the clang version
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// installed by OS X 10.9.
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ptr_hash() noexcept
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{
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}
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size_t operator()(const T* p) const noexcept
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{
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return knuth32_hash(reinterpret_cast<size_t>(p));
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}
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};
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/// \ingroup hash_funcs
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/// \brief A hash function for strings.
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typedef std::hash<std::string> string_hash;
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/// \ingroup hash_funcs
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/// \brief A hash function that returns identity
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template<typename T>
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struct identity_hash:
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public std::unary_function<const T&, size_t>
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{
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// A default constructor is needed if the identity_hash object is
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// stored in a const member.
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identity_hash()
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{
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}
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size_t operator()(const T& s) const noexcept
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{
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return s;
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}
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};
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struct pair_hash
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{
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template<typename T, typename U>
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std::size_t operator()(const std::pair<T, U> &p) const noexcept
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{
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if constexpr (std::is_integral<T>::value
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&& sizeof(T) <= sizeof(std::size_t)/2
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&& std::is_integral<U>::value
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&& sizeof(U) <= sizeof(std::size_t)/2)
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{
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constexpr unsigned shift = (sizeof(std::size_t)/2)*CHAR_BIT;
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std::size_t h = p.first;
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h <<= shift;
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h += p.second;
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return h;
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}
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else
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{
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std::hash<T> th;
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std::hash<U> uh;
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return wang32_hash(static_cast<size_t>(th(p.first)) ^
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static_cast<size_t>(uh(p.second)));
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}
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}
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};
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// From primes.utm.edu shuffled. This primes are used when we simulate
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// transition shuffling using "primitive root modulo n" technique.
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static const unsigned primes[144] =
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{
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295075531, 334214857, 314607103, 314607191, 334214891, 334214779,
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295075421, 472882073, 256203329, 275604599, 314606953, 256203397,
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275604547, 256203631, 275604617, 472882141, 472882297, 472882219,
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256203229, 256203469, 275604643, 472882169, 275604803, 472882283,
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295075463, 334214593, 295075213, 256203373, 314607019, 314607193,
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295075399, 256203523, 314607001, 295075289, 256203293, 256203641,
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256203307, 314607047, 295075373, 314607053, 314606977, 334214681,
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275604691, 275604577, 472882447, 314607031, 275605019, 472882477,
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472882499, 314607173, 295075241, 295075471, 295075367, 256203559,
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314607233, 275604881, 334214941, 472882103, 275604821, 472882511,
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295075357, 472882517, 314607023, 256203317, 295075337, 275605007,
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472882391, 256203223, 334214723, 295075381, 295075423, 275604733,
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314607113, 256203257, 472882453, 256203359, 295075283, 314607043,
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256203403, 472882259, 314606891, 472882253, 314606917, 256203349,
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256203457, 295075457, 472882171, 314607229, 295075513, 472882429,
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334214953, 275604841, 295075309, 472882099, 334214467, 334214939,
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275604869, 314607077, 314607089, 275604947, 275605027, 295075379,
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334214861, 314606909, 334214911, 314607199, 275604983, 314606969,
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256203221, 334214899, 256203611, 256203679, 472882337, 275604767,
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472882199, 295075523, 472882049, 275604817, 334214561, 334214581,
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334214663, 295075489, 295075163, 334214869, 334214521, 295075499,
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275604913, 334214753, 334214687, 256203491, 295075153, 334214893,
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472882411, 472882117, 275604793, 334214833, 334214591, 314607091,
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256203419, 275604727, 256203659, 275604961, 334214557, 275604677
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};
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}
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