pluginldr.h

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2015-2016 Cirilo Bernardo <[email protected]>
 * Copyright The KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

 
 
#ifndef PLUGINLDR_H
#define PLUGINLDR_H
 
#include <string>
#include <wx/dynlib.h>
#include <wx/string.h>
 
// Mask for plugin loader tracing.
extern const wxChar* const tracePluginLoader;
 
#define MASK_PLUGINLDR wxT( "PLUGIN_LOADER" )
 
 
// helper function to link functions in the plugin
#define LINK_ITEM( funcPtr, funcType, funcName ) \
    funcPtr = (funcType) m_PluginLoader.GetSymbol( wxT( funcName ) )
 
// typedefs of the functions exported by the 3D Plugin Class
typedef char const* (*GET_PLUGIN_CLASS) ( void );
 
typedef void (*GET_CLASS_VERSION) ( unsigned char*, unsigned char*,
    unsigned char*, unsigned char* );
 
typedef bool (*CHECK_CLASS_VERSION) ( unsigned char, unsigned char,
    unsigned char, unsigned char );
 
typedef const char* (*GET_PLUGIN_NAME) ( void );
 
typedef void (*GET_VERSION) ( unsigned char*, unsigned char*,
    unsigned char*, unsigned char* );
 
 
class KICAD_PLUGIN_LDR
{
public:
    KICAD_PLUGIN_LDR();
    virtual ~KICAD_PLUGIN_LDR();

    virtual void GetLoaderVersion( unsigned char* Major, unsigned char* Minor,
                                   unsigned char* Patch, unsigned char* Revision ) const = 0;

    virtual bool Open( const wxString& aFullFileName ) = 0;

    virtual void Close( void ) = 0;

    std::string GetLastError( void ) const;
 
    // Return the Plugin Class or NULL if no plugin loaded.
    char const* GetKicadPluginClass( void );
 
    // Return false if no plugin loaded.
    bool GetClassVersion( unsigned char* Major, unsigned char* Minor,
                          unsigned char* Patch, unsigned char* Revision );
 
    // Return false if the class version check fails or no plugin is loaded.
    bool CheckClassVersion( unsigned char Major, unsigned char Minor,
                            unsigned char Patch, unsigned char Revision );
 
    // Return the Plugin Name or NULL if no plugin loaded.
    const char* GetKicadPluginName( void );
 
    // Return false if no plugin is loaded.
    bool GetVersion( unsigned char* Major, unsigned char* Minor,
                     unsigned char* Patch, unsigned char* Revision );
 
    void GetPluginInfo( std::string& aPluginInfo );
 
protected:
    bool open( const wxString& aFullFileName, const char* aPluginClass );

    void close( void );

    bool reopen( void );
 
    std::string m_error;    // error message
 
    // the plugin loader
    wxDynamicLibrary m_PluginLoader;
 
private:
    bool                ok;                       // set TRUE if all functions are linked
    GET_PLUGIN_CLASS    m_getPluginClass;
    GET_CLASS_VERSION   m_getClassVersion;
    CHECK_CLASS_VERSION m_checkClassVersion;
    GET_PLUGIN_NAME     m_getPluginName;
    GET_VERSION         m_getVersion;
    wxString            m_fileName;               // name of last opened Plugin
    std::string         m_pluginInfo;             // Name:Version tag for plugin
};
 
#endif  // PLUGINLDR_H