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git-svn-id: svn://localhost/trunk/ardour2@4 d708f5d6-7413-0410-9779-e7cbd77b26cf
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Taybin Rutkin 2005-05-13 20:47:18 +00:00
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libs/glibmm2/glibmm/quark.h Normal file
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// -*- c++ -*-
#ifndef _GLIBMM_QUARK_H
#define _GLIBMM_QUARK_H
/* $Id$ */
/* quark.h
*
* Copyright 2002 The gtkmm Development Team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <glib/gquark.h>
#include <glibmm/ustring.h>
namespace Glib
{
/** Quarks are unique IDs in Glib for strings for use in
* hash table lookups. Each Quark is unique but may change
* between runs.
*
* QueryQuark is a converter class for looking up but not
* allocating an ID. An id means the quark lookup failed.
*
* Quark is used for actions for which the id should live on
* While QueryQuark should be used for queries.
* ie.
* void set_data (const Quark&, void * data);
* void* get_data (const QueryQuark&);
*/
class QueryQuark
{
public:
QueryQuark(const GQuark& q);
QueryQuark(const ustring& s);
QueryQuark(const char*s);
~QueryQuark() {}
QueryQuark& operator=(const QueryQuark& q);
operator ustring() const;
operator GQuark() const {return quark_;}
GQuark id() const {return quark_;}
private:
GQuark quark_;
};
class Quark: public QueryQuark
{
public:
Quark(const ustring& s);
Quark(const char* s);
~Quark();
};
/** @relates Glib::QueryQuark */
inline bool operator==(const QueryQuark& a, const QueryQuark& b)
{ return a.id() == b.id(); }
/** @relates Glib::QueryQuark */
inline bool operator!=(const QueryQuark& a, const QueryQuark& b)
{ return a.id() != b.id(); }
#ifndef DOXYGEN_SHOULD_SKIP_THIS
// TODO: Put this somewhere else.
// (internal) The quark for C++ wrappers.
extern GLIBMM_API GQuark quark_;
extern GLIBMM_API GQuark quark_cpp_wrapper_deleted_;
#endif
} /* namespace Glib */
#endif /* _GLIBMM_QUARK_H */