rename src/ as spot/ and use include <spot/...>

* NEWS: Mention the change.
* src/: Rename as ...
* spot/: ... this, adjust all headers to include <spot/...> instead of
"...", and adjust all Makefile.am to search headers from the top-level
directory.
* HACKING: Add conventions about #include.
* spot/sanity/style.test: Add a few more grep to catch cases
that do not follow these conventions.
* .gitignore, Makefile.am, README, bench/stutter/Makefile.am,
bench/stutter/stutter_invariance_formulas.cc,
bench/stutter/stutter_invariance_randomgraph.cc, configure.ac,
debian/rules, doc/Doxyfile.in, doc/Makefile.am,
doc/org/.dir-locals.el.in, doc/org/g++wrap.in, doc/org/init.el.in,
doc/org/tut01.org, doc/org/tut02.org, doc/org/tut03.org,
doc/org/tut10.org, doc/org/tut20.org, doc/org/tut21.org,
doc/org/tut22.org, doc/org/tut30.org, iface/ltsmin/Makefile.am,
iface/ltsmin/kripke.test, iface/ltsmin/ltsmin.cc,
iface/ltsmin/ltsmin.hh, iface/ltsmin/modelcheck.cc,
wrap/python/Makefile.am, wrap/python/ajax/spotcgi.in,
wrap/python/spot_impl.i, wrap/python/tests/ltl2tgba.py,
wrap/python/tests/randgen.py, wrap/python/tests/run.in: Adjust.

spot/twaalgos/postproc.hh

@@ -0,0 +1,131 @@
+// -*- coding: utf-8 -*-
+// Copyright (C) 2012, 2013, 2014, 2015 Laboratoire de Recherche et
+// Développement de l'Epita (LRDE).
+//
+// This file is part of Spot, a model checking library.
+//
+// Spot is free software; you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+//
+// Spot is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+// or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+// License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#pragma once
+
+#include <spot/twa/twagraph.hh>
+
+namespace spot
+{
+  class option_map;
+
+  /// \addtogroup twa_reduction
+  /// @{
+
+  /// \brief Wrap TGBA/BA/Monitor post-processing algorithms in an
+  /// easy interface.
+  ///
+  /// This class is a shell around scc_filter(),
+  /// minimize_obligation(), simulation(), iterated_simulations(), and
+  /// degeneralize().  These different algorithms will be combined
+  /// depending on the various options set with set_type(),
+  /// set_pref(), and set_level().
+  ///
+  /// This helps hiding some of the logic required to combine these
+  /// simplifications efficiently (e.g., there is no point calling
+  /// degeneralize() or any simulation when minimize_obligation()
+  /// succeeded.)
+  ///
+  /// Use set_pref() method to specify whether you favor
+  /// deterministic automata or small automata.  If you don't care,
+  /// less post processing will be done.
+  ///
+  /// The set_level() method lets you set the optimization level.
+  /// A higher level enables more costly post-processings.  For instance
+  /// pref=Small,level=High will try two different post-processings
+  /// (one with minimize_obligation(), and one with
+  /// iterated_simulations()) an keep the smallest result.
+  /// pref=Small,level=Medium will only try the iterated_simulations()
+  /// when minimized_obligation failed to produce an automaton smaller
+  /// than its input.  pref=Small,level=Low will only run
+  /// simulation().
+  class SPOT_API postprocessor
+  {
+  public:
+    /// \brief Construct a postprocessor.
+    ///
+    /// The \a opt argument can be used to pass extra fine-tuning
+    /// options used for debugging or benchmarking.
+    postprocessor(const option_map* opt = nullptr);
+
+    enum output_type { TGBA, BA, Monitor, Generic };
+    void
+    set_type(output_type type)
+    {
+      type_ = type;
+    }
+
+    enum
+    {
+      Any = 0,
+      Small = 1,		// Small and Deterministic
+      Deterministic = 2,	// are exclusive choices.
+      Complete = 4,
+      SBAcc = 8,		// State-based acceptance.
+      Unambiguous = 16,
+    };
+    typedef int output_pref;
+
+    void
+    set_pref(output_pref pref)
+    {
+      pref_ = pref;
+    }
+
+    enum optimization_level { Low, Medium, High };
+    void
+    set_level(optimization_level level)
+    {
+      level_ = level;
+    }
+
+    /// \brief Optimize an automaton.
+    ///
+    /// The returned automaton might be a new automaton,
+    /// or an in-place modification of the \a input automaton.
+    twa_graph_ptr run(twa_graph_ptr input, formula f = nullptr);
+
+  protected:
+    twa_graph_ptr do_simul(const twa_graph_ptr& input, int opt);
+    twa_graph_ptr do_sba_simul(const twa_graph_ptr& input, int opt);
+    twa_graph_ptr do_degen(const twa_graph_ptr& input);
+    twa_graph_ptr do_scc_filter(const twa_graph_ptr& a, bool arg);
+    twa_graph_ptr do_scc_filter(const twa_graph_ptr& a);
+
+    output_type type_;
+    int pref_;
+    optimization_level level_;
+    // Fine-tuning options fetched from the option_map.
+    bool degen_reset_;
+    bool degen_order_;
+    int degen_cache_;
+    bool degen_lskip_;
+    bool degen_lowinit_;
+    int simul_;
+    int scc_filter_;
+    int ba_simul_;
+    bool tba_determinisation_;
+    int sat_minimize_;
+    int sat_acc_;
+    int sat_states_;
+    bool state_based_;
+    bool wdba_minimize_;
+  };
+  /// @}
+}