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/taalgos/reachiter.hh

@@ -0,0 +1,131 @@
+// -*- coding: utf-8 -*-
+// Copyright (C) 2010, 2011, 2012, 2013, 2014 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/misc/hash.hh>
+#include <spot/ta/ta.hh>
+#include <stack>
+#include <deque>
+
+namespace spot
+{
+  /// \ingroup ta_generic
+  /// \brief Iterate over all reachable states of a spot::ta.
+  class SPOT_API ta_reachable_iterator
+  {
+  public:
+    ta_reachable_iterator(const const_ta_ptr& a);
+    virtual
+    ~ta_reachable_iterator();
+
+    /// \brief Iterate over all reachable states of a spot::ta.
+    ///
+    /// This is a template method that will call add_state(), next_state(),
+    /// start(), end(), process_state(), and process_link(), while it
+    /// iterates over states.
+    void
+    run();
+
+    /// \name Todo list management.
+    ///
+    /// spot::ta_reachable_iterator_depth_first and
+    /// spot::ta_reachable_iterator_breadth_first offer two precanned
+    /// implementations for these functions.
+    /// \{
+    /// \brief Called by run() to register newly discovered states.
+    virtual void
+    add_state(const state* s) = 0;
+    /// \brief Called by run() to obtain the next state to process.
+    virtual const state*
+    next_state() = 0;
+    /// \}
+
+    /// Called by add_state or next_states implementations to filter
+    /// states.  Default implementation always return true.
+    virtual bool
+    want_state(const state* s) const;
+
+    /// Called by run() before starting its iteration.
+    virtual void
+    start();
+    /// Called by run() once all states have been explored.
+    virtual void
+    end();
+
+    /// Called by run() to process a state.
+    ///
+    /// \param s The current state.
+    /// \param n A unique number assigned to \a s.
+    virtual void
+    process_state(const state* s, int n);
+    /// Called by run() to process a transition.
+    ///
+    /// \param in The source state number.
+    /// \param out The destination state number.
+    /// \param si The spot::twa_succ_iterator positionned on the current
+    ///             transition.
+    virtual void
+    process_link(int in, int out, const ta_succ_iterator* si);
+
+  protected:
+
+    const_ta_ptr t_automata_; ///< The spot::ta to explore.
+
+    typedef std::unordered_map<const state*, int,
+			       state_ptr_hash, state_ptr_equal> seen_map;
+    seen_map seen; ///< States already seen.
+  };
+
+  /// \ingroup ta_generic
+  /// \brief An implementation of spot::ta_reachable_iterator that browses
+  /// states depth first.
+  class SPOT_API ta_reachable_iterator_depth_first
+    : public ta_reachable_iterator
+  {
+  public:
+    ta_reachable_iterator_depth_first(const const_ta_ptr& a);
+
+    virtual void
+    add_state(const state* s);
+    virtual const state*
+    next_state();
+
+  protected:
+    std::stack<const state*> todo; ///< A stack of states yet to explore.
+  };
+
+  /// \ingroup ta_generic
+  /// \brief An implementation of spot::ta_reachable_iterator that browses
+  /// states breadth first.
+  class SPOT_API ta_reachable_iterator_breadth_first
+    : public ta_reachable_iterator
+  {
+  public:
+    ta_reachable_iterator_breadth_first(const const_ta_ptr& a);
+
+    virtual void
+    add_state(const state* s);
+    virtual const state*
+    next_state();
+
+  protected:
+    std::deque<const state*> todo; ///< A queue of states yet to explore.
+  };
+}