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Add engine event interface files and stub .c file.

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guid.[ch]: cleanup


git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@3259 57a11ea4-9604-0410-9ed3-97b8803252fd
This commit is contained in:
Dave Peticolas 2000-12-07 11:28:30 +00:00
parent 522f3e20cb
commit ab4e1534a8
6 changed files with 191 additions and 24 deletions
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11
src/engine/Makefile.am
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@ -26,9 +26,10 @@ libgncengine_la_SOURCES = \
kvp_frame.c \
gnc-book.c \
gnc-commodity.c \
gnc-numeric.c \
gnc-engine.c \
gnc-engine-util.c
gnc-engine-util.c \
gnc-event.c \
gnc-numeric.c
libgncengine_la_LDFLAGS = -version-info 2:1:1
@ -57,9 +58,11 @@ noinst_HEADERS = \
kvp_frame.h \
gnc-book.h \
gnc-commodity.h \
gnc-numeric.h \
gnc-engine.h \
gnc-engine-util.h
gnc-engine-util.h \
gnc-event.h \
gnc-event-p.h \
gnc-numeric.h
EXTRA_DIST = \
.cvsignore \

45
src/engine/gnc-event-p.h Normal file
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@ -0,0 +1,45 @@
/********************************************************************
* gnc-event-p.h -- private engine event handling interface *
* Copyright 2000 Dave Peticolas <dave@krondo.com> *
* *
* 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 *
* 59 Temple Place - Suite 330 Fax: +1-617-542-2652 *
* Boston, MA 02111-1307, USA gnu@gnu.org *
* *
********************************************************************/
#ifndef __GNC_EVENT_P_H__
#define __GNC_EVENT_P_H__
#include "gnc-event.h"
/* gnc_engine_generate_event
* Invoke all registered event handlers using the given arguments.
*
* GNC_EVENT_CREATE events should be generated after the object
* has been created and registered in the engine entity table.
* GNC_EVENT_MODIFY events should be generated whenever any data
* member or submember (i.e., splits) is changed.
* GNC_EVENT_DESTROY events should be called before the object
* has been destroyed or removed from the entity table.
*
* entity: the GUID of the entity generating the event
* event_type: the type of event -- this should be one of the
* GNCEngineEventType values, not a combination.
*/
void gnc_engine_generate_event (GUID *entity, GNCEngineEventType event_type);
#endif

26
src/engine/gnc-event.c Normal file
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@ -0,0 +1,26 @@
/********************************************************************
* gnc-event.c -- engine event handling implementation *
* Copyright 2000 Dave Peticolas <dave@krondo.com> *
* *
* 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 *
* 59 Temple Place - Suite 330 Fax: +1-617-542-2652 *
* Boston, MA 02111-1307, USA gnu@gnu.org *
* *
********************************************************************/
#include "config.h"
#include "gnc-event-p.h"

81
src/engine/gnc-event.h Normal file
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@ -0,0 +1,81 @@
/********************************************************************
* gnc-event.h -- engine event handling interface *
* Copyright 2000 Dave Peticolas <dave@krondo.com> *
* *
* 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 *
* 59 Temple Place - Suite 330 Fax: +1-617-542-2652 *
* Boston, MA 02111-1307, USA gnu@gnu.org *
* *
********************************************************************/
#ifndef __GNC_EVENT_H__
#define __GNC_EVENT_H__
#include <glib.h>
#include "guid.h"
typedef enum
{
GNC_EVENT_CREATE = 1 << 0,
GNC_EVENT_MODIFY = 1 << 1,
GNC_EVENT_DESTROY = 1 << 2
} GNCEngineEventType;
/* GNCEngineEventCallback
* Callback invoked when an engine event occurs.
*
* entity: GUID of entity generating event
* event_type: one of GNCEngineEventType, not a combination
* user_data: user_data supplied when callback was registered.
*/
typedef void (*GNCEngineEventHandler) (GUID *entity,
GNCEngineEventType event_type,
gpointer user_data);
/* gnc_engine_register_event_handler
* Register a handler for engine events.
*
* handler: handler to register
* user_data: data provided in future callbacks
*
* Returns: id identifying callback
*/
gint gnc_engine_register_event_handler (GNCEngineEventHandler handler,
gpointer user_data);
/* gnc_engine_unregister_event_handler
* Unregister an engine event handler.
*
* handler_id: the id of the handler to unregister
*/
void gnc_engine_unregister_event_handler (gint handler_id);
/* gnc_engine_suspend_events
* Suspend all engine events. This function may be
* called multiple times. To resume event generation,
* an equal number of calls to gnc_engine_resume_events
* must be made.
*/
void gnc_engine_suspend_events (void);
/* gnc_engine_resume_events
* Resume engine event generation.
*/
void gnc_engine_resume_events (void);
#endif

47
src/engine/guid.c
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@ -455,28 +455,38 @@ guid_equal(const GUID *guid_1, const GUID *guid_2)
}
gint
guid_compare(const GUID *guid_1, const GUID *guid_2) {
if(guid_1 == guid_2) return 0;
/* nothing is always less than something */
if(!guid_1 && guid_2) return -1;
if(guid_1 && !guid_2) return 1;
guid_compare(const GUID *guid_1, const GUID *guid_2)
{
if (guid_1 == guid_2)
return 0;
return(memcmp(guid_1, guid_2, sizeof(GUID)));
/* nothing is always less than something */
if (!guid_1 && guid_2)
return -1;
if (guid_1 && !guid_2)
return 1;
return memcmp (guid_1, guid_2, sizeof (GUID));
}
guint
guid_hash_to_guint(gconstpointer ptr)
guid_hash_to_guint (gconstpointer ptr)
{
GUID *guid = (GUID *) ptr;
const GUID *guid = ptr;
if(!guid) {
if (!guid)
{
fprintf(stderr, "guid_g_hash_table_hash: received NULL guid pointer.");
return(0);
return 0;
}
if (sizeof(guint) <= sizeof(guid->data)) {
return(*((guint *) guid->data));
} else {
if (sizeof(guint) <= sizeof(guid->data))
{
return (*((guint *) guid->data));
}
else
{
guint hash = 0;
int i, j;
@ -487,17 +497,18 @@ guid_hash_to_guint(gconstpointer ptr)
hash |= guid->data[j];
}
return(hash);
return hash;
}
}
static gint
guid_g_hash_table_equal(gconstpointer guid_a, gconstpointer guid_b)
guid_g_hash_table_equal (gconstpointer guid_a, gconstpointer guid_b)
{
return((gint) guid_equal((GUID *) guid_a, (GUID *) guid_b));
return guid_equal (guid_a, guid_b);
}
GHashTable *
guid_hash_table_new() {
return(g_hash_table_new(guid_hash_to_guint, guid_g_hash_table_equal));
guid_hash_table_new (void)
{
return g_hash_table_new (guid_hash_to_guint, guid_g_hash_table_equal);
}

5
src/engine/guid.h
View File

@ -25,9 +25,10 @@
#define __GUID_H__
#ifdef HAVE_CONFIG_H
# include <config.h>
# include "config.h"
#endif
#include <ctype.h>
#include <glib.h>
/* This file defines an API for using globally unique identifiers. */
@ -96,6 +97,6 @@ gint guid_compare(const GUID *g1, const GUID *g2);
/* Given a GUID *, hash it to a guint */
guint guid_hash_to_guint(gconstpointer ptr);
GHashTable *guid_hash_table_new();
GHashTable *guid_hash_table_new(void);
#endif