First sketch of the GSPN wrapper objects.

* iface/gspn/gspn.cc, iface/gspn/gspn.hh: New files.
* iface/gspn/Makefile.am (libspotgspn_la_SOURCES): Add them.

iface/gspn/gspn.hh

@@ -0,0 +1,81 @@
+#ifndef SPOT_IFACE_GSPN_HH
+# define SPOT_IFACE_GSPN_HH
+
+// Try not to include gspnlib.h here, or it will polute the user's
+// namespace with internal C symbols. 
+
+# include <string>
+# include "tgba/tgba.hh"
+# include "ltlast/atomic_prop.hh"
+# include "ltlenv/environment.hh"
+
+namespace spot
+{
+
+  /// An exeption used to forward GSPN errors.
+  class gspn_exeption
+  {
+  public:
+    gspn_exeption(int err)
+      : err(err)
+    {
+    }
+    
+    int
+    get_err() const
+    {
+      return err;
+    }
+  private:
+    int err;
+  };
+     
+
+  class gspn_environment : public ltl::environment
+  {
+  public:
+    gspn_environment();
+    ~gspn_environment();
+
+    /// Declare an atomic proposition.  Return false iff the
+    /// proposition was already declared.
+    bool declare(const std::string& prop_str);
+
+    virtual ltl::formula* require(const std::string& prop_str);
+    
+    /// Get the name of the environment.
+    virtual const std::string& name();
+
+    typedef std::map<const std::string, ltl::atomic_prop*> prop_map; 
+
+    /// Get the map of atomic proposition known to this environment.
+    const prop_map& get_prop_map() const;
+
+  private:
+    prop_map props_;
+  };
+
+
+  /// Data private to tgba_gspn.
+  struct tgba_gspn_private_;
+
+  class tgba_gspn: public tgba
+  {
+  public:
+    tgba_gspn(const gspn_environment& env);
+    tgba_gspn(const tgba_gspn& other);
+    tgba_gspn& operator=(const tgba_gspn& other);
+    virtual ~tgba_gspn();
+    virtual state* get_init_state() const;
+    virtual tgba_succ_iterator* succ_iter(const state* state) const;
+    virtual const tgba_bdd_dict& get_dict() const;
+    virtual std::string format_state(const state* state) const;
+    virtual bdd all_accepting_conditions() const;
+    virtual bdd neg_accepting_conditions() const;
+  private:
+    tgba_gspn_private_* data_;
+  };
+  
+}
+
+#endif // SPOT_IFACE_GSPN_HH