qofid.h

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/********************************************************************\
 * qofid.h -- QOF entity type identification system                 *
 *                                                                  *
 * 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, contact:                        *
 *                                                                  *
 * Free Software Foundation           Voice:  +1-617-542-5942       *
 * 51 Franklin Street, Fifth Floor    Fax:    +1-617-542-2652       *
 * Boston, MA  02110-1301,  USA       gnu@gnu.org                   *
 *                                                                  *
\********************************************************************/

#ifndef QOF_ID_H
#define QOF_ID_H

#include <string.h>
#include "guid.h"

typedef const gchar *QofIdType;
typedef const gchar *QofIdTypeConst;
typedef const gchar *QofLogModule;

#define QOF_ID_NONE           NULL
#define QOF_ID_NULL           "null"

#define QOF_ID_BOOK           "Book"
#define QOF_ID_SESSION        "Session"

#define QOF_ENTITY(object) ((QofEntity *)(object))

#define QSTRCMP(da,db) ({                \
  gint val = 0;                          \
  if ((da) && (db)) {                    \
    if ((da) != (db)) {                  \
      val = strcmp ((da), (db));         \
    }                                    \
  } else                                 \
  if ((!(da)) && (db)) {                 \
    val = -1;                            \
  } else                                 \
  if ((da) && (!(db))) {                 \
    val = 1;                             \
  }                                      \
  val; /* block assumes value of last statment */  \
})

#define QOF_CHECK_TYPE(obj,type) (((obj) != NULL) && \
  (0 == QSTRCMP((type),(((QofEntity *)(obj))->e_type))))

#define QOF_CHECK_CAST(obj,e_type,c_type) (                   \
  QOF_CHECK_TYPE((obj),(e_type)) ?                            \
  (c_type *) (obj) :                                          \
  (c_type *) ({                                               \
     g_log (G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL,               \
       "Error: Bad QofEntity at %s:%d", __FILE__, __LINE__);  \
     (obj);                                                   \
  }))

typedef struct QofEntity_s QofEntity;
typedef struct QofCollection_s QofCollection;

struct QofEntity_s
{
    QofIdType e_type;
    GUID guid;
    QofCollection *collection;
};

void qof_entity_init (QofEntity *, QofIdType, QofCollection *);

void qof_entity_release (QofEntity *);
const GUID *qof_entity_get_guid (QofEntity *);

QofCollection *qof_collection_new (QofIdType type);

guint qof_collection_count (QofCollection * col);

void qof_collection_destroy (QofCollection * col);

QofIdType qof_collection_get_type (QofCollection *);

QofEntity *
qof_collection_lookup_entity (QofCollection *, const GUID *);

typedef void (*QofEntityForeachCB) (QofEntity *, gpointer user_data);

void 
qof_collection_foreach (QofCollection *, QofEntityForeachCB,
                        gpointer user_data);

gpointer 
qof_collection_get_data (QofCollection * col);

void 
qof_collection_set_data (QofCollection * col, gpointer user_data);

gboolean 
qof_collection_is_dirty (QofCollection * col);

gboolean 
qof_collection_add_entity (QofCollection * coll, QofEntity * ent);

gboolean 
qof_collection_merge (QofCollection * target, QofCollection * merge);

gint 
qof_collection_compare (QofCollection * target, QofCollection * merge);

QofCollection *
qof_collection_from_glist (QofIdType type, GList * glist);

#endif /* QOF_ID_H */

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