77a17881a3
* spot/misc/permute.hh: New file. * spot/misc/Makefile.am: Add it. * spot/graph/graph.hh, spot/twa/twagraph.cc, spot/twaalgos/randomize.cc: Use the new permute_vector() function. * spot/twa/twagraph.hh: Update documentation. * NEWS: Update.
75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
// -*- coding: utf-8 -*-
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// Copyright (C) by the Spot authors, see the AUTHORS file for details.
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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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#include "config.h"
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#include <algorithm>
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#include <numeric>
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#include <spot/twaalgos/randomize.hh>
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#include <spot/misc/permute.hh>
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#include <spot/misc/random.hh>
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namespace spot
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{
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void
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randomize(twa_graph_ptr& aut, bool randomize_states,
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bool randomize_edges)
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{
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if (!aut->is_existential())
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throw std::runtime_error
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("randomize() does not yet support alternation");
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if (!randomize_states && !randomize_edges)
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return;
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auto& g = aut->get_graph();
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if (randomize_states)
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{
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unsigned n = g.num_states();
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std::vector<unsigned> nums(n);
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std::iota(nums.begin(), nums.end(), 0);
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mrandom_shuffle(nums.begin(), nums.end());
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g.rename_states_(nums);
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aut->set_init_state(nums[aut->get_init_state_number()]);
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if (auto sn =
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aut->get_named_prop<std::vector<std::string>>("state-names"))
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{
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sn->resize(n);
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permute_vector(*sn, nums);
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}
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if (auto hs = aut->get_named_prop<std::map<unsigned, unsigned>>
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("highlight-states"))
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{
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std::map<unsigned, unsigned> hs2;
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for (auto p: *hs)
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hs2[nums[p.first]] = p.second;
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std::swap(*hs, hs2);
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}
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}
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if (randomize_edges)
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{
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g.remove_dead_edges_();
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auto& v = g.edge_vector();
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mrandom_shuffle(v.begin() + 1, v.end());
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}
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aut->set_named_prop("highlight-edges", nullptr);
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typedef twa_graph::graph_t::edge_storage_t tr_t;
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g.sort_edges_([](const tr_t& lhs, const tr_t& rhs)
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{ return lhs.src < rhs.src; });
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g.chain_edges_();
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}
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}
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