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/*
 *  @(#) $Id: gwymoduleloader.h 15598 2013-11-11 12:33:32Z yeti-dn $
 *  Copyright (C) 2003,2004 David Necas (Yeti), Petr Klapetek.
 *  E-mail: yeti@gwyddion.net, klapetek@gwyddion.net.
 *
 *  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, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA 02110-1301, USA.
 */

#ifndef __GWY_MODULE_LOADER_H__
#define __GWY_MODULE_LOADER_H__

#include <gmodule.h>

G_BEGIN_DECLS

#define GWY_MODULE_ABI_VERSION 2

#ifdef  __cplusplus
#define __GWY_MODULE_QUERY_EXTERN_C extern "C"
#else
#define __GWY_MODULE_QUERY_EXTERN_C /* */
#endif

#define GWY_MODULE_QUERY(mod_info) \
    __GWY_MODULE_QUERY_EXTERN_C G_MODULE_EXPORT GwyModuleInfo* \
    _gwy_module_query(void) { return &mod_info; } \

#define GWY_MODULE_ERROR gwy_module_error_quark()

typedef enum {
    GWY_MODULE_ERROR_NAME,
    GWY_MODULE_ERROR_DUPLICATE,
    GWY_MODULE_ERROR_OPEN,
    GWY_MODULE_ERROR_QUERY,
    GWY_MODULE_ERROR_ABI,
    GWY_MODULE_ERROR_INFO,
    GWY_MODULE_ERROR_REGISTER
} GwyModuleError;

/* FIXME: This is a public structure, remove the underscore indirection. */
typedef struct _GwyModuleInfo GwyModuleInfo;

typedef gboolean       (*GwyModuleRegisterFunc) (void);
typedef GwyModuleInfo* (*GwyModuleQueryFunc)    (void);

struct _GwyModuleInfo {
    guint32 abi_version;
    GwyModuleRegisterFunc register_func;
    const gchar *blurb;
    const gchar *author;
    const gchar *version;
    const gchar *copyright;
    const gchar *date;
};

GQuark                  gwy_module_error_quark      (void);
void                    gwy_module_register_modules (const gchar **paths);
const GwyModuleInfo*    gwy_module_lookup           (const gchar *name);
const gchar*            gwy_module_get_filename     (const gchar *name);
GSList*                 gwy_module_get_functions    (const gchar *name);
void                    gwy_module_foreach          (GHFunc function,
                                                     gpointer data);
const GwyModuleInfo*    gwy_module_register_module  (const gchar *name,
                                                     GError **error);

G_END_DECLS

#endif /* __GWY_MODULE_LOADER_H__ */

/* vim: set cin et ts=4 sw=4 cino=>1s,e0,n0,f0,{0,}0,^0,\:1s,=0,g1s,h0,t0,+1s,c3,(0,u0 : */