89 lines
2.3 KiB
C++
89 lines
2.3 KiB
C++
// -*- c++ -*-
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#ifndef _GLIBMM_QUARK_H
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#define _GLIBMM_QUARK_H
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/* $Id$ */
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/* quark.h
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*
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* Copyright 2002 The gtkmm Development Team
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <glib/gquark.h>
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#include <glibmm/ustring.h>
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namespace Glib
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{
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/** Quarks are unique IDs in Glib for strings for use in
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* hash table lookups. Each Quark is unique but may change
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* between runs.
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*
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* QueryQuark is a converter class for looking up but not
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* allocating an ID. An id means the quark lookup failed.
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*
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* Quark is used for actions for which the id should live on
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* While QueryQuark should be used for queries.
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* ie.
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* void set_data (const Quark&, void * data);
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* void* get_data (const QueryQuark&);
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*/
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class QueryQuark
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{
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public:
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QueryQuark(const GQuark& q);
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QueryQuark(const ustring& s);
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QueryQuark(const char*s);
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~QueryQuark() {}
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QueryQuark& operator=(const QueryQuark& q);
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operator ustring() const;
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operator GQuark() const {return quark_;}
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GQuark id() const {return quark_;}
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private:
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GQuark quark_;
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};
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class Quark: public QueryQuark
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{
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public:
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Quark(const ustring& s);
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Quark(const char* s);
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~Quark();
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};
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/** @relates Glib::QueryQuark */
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inline bool operator==(const QueryQuark& a, const QueryQuark& b)
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{ return a.id() == b.id(); }
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/** @relates Glib::QueryQuark */
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inline bool operator!=(const QueryQuark& a, const QueryQuark& b)
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{ return a.id() != b.id(); }
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#ifndef DOXYGEN_SHOULD_SKIP_THIS
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// TODO: Put this somewhere else.
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// (internal) The quark for C++ wrappers.
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extern GLIBMM_API GQuark quark_;
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extern GLIBMM_API GQuark quark_cpp_wrapper_deleted_;
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#endif
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} /* namespace Glib */
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#endif /* _GLIBMM_QUARK_H */
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