From 846d3e4421432794e7f183ccae5cb75a3e7a9066 Mon Sep 17 00:00:00 2001
From: Linas Vepstas <linas@linas.org>
Date: Sat, 11 Oct 2003 20:49:55 +0000
Subject: [PATCH]  gnc objects have a lot in common.  This thingy will try to 
 abstract out all teh common-ness between them.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@9464 57a11ea4-9604-0410-9ed3-97b8803252fd
---
 src/engine/Makefile.am   |  2 ++
 src/engine/qofinstance.c | 30 +++++++++++++++++++++++++
 src/engine/qofinstance.h | 47 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 79 insertions(+)
 create mode 100644 src/engine/qofinstance.c
 create mode 100644 src/engine/qofinstance.h

diff --git a/src/engine/Makefile.am b/src/engine/Makefile.am
index 8934365b55..91e1b38c9d 100644
--- a/src/engine/Makefile.am
+++ b/src/engine/Makefile.am
@@ -46,6 +46,7 @@ libgncmod_engine_la_SOURCES = \
   qofbook.c \
   qofclass.c \
   qofid.c \
+  qofinstance.c \
   qofobject.c \
   qofquery.c \
   qofquerycore.c \
@@ -100,6 +101,7 @@ gncinclude_HEADERS = \
   qofbook.h \
   qofclass.h \
   qofid.h \
+  qofinstance.h \
   qofobject.h \
   qofquery.h \
   qofquerycore.h \
diff --git a/src/engine/qofinstance.c b/src/engine/qofinstance.c
new file mode 100644
index 0000000000..e0dcfaf687
--- /dev/null
+++ b/src/engine/qofinstance.c
@@ -0,0 +1,30 @@
+/*
+ * qofinstance.c
+ *
+ * Object instance holds many common fields that most
+ * gnucash objects use.
+ * 
+ * Copyright (C) 2003 Linas Vepstas <linas@linas.org>
+ */
+
+#include "qofinstance.h"
+
+void 
+qof_instance_init (QofInstance *inst)
+{
+	inst->kvp_data = kvp_frame_new();
+}
+
+void 
+qof_instance_release (QofInstance *inst)
+{
+   kvp_frame_delete (inst->kvp_data);
+}
+
+KvpFrame* 
+qof_instance_get_slots (QofInstance *inst)
+{
+  if (!inst) return NULL;
+  return inst->kvp_data;
+}
+
diff --git a/src/engine/qofinstance.h b/src/engine/qofinstance.h
new file mode 100644
index 0000000000..2d0794cdc8
--- /dev/null
+++ b/src/engine/qofinstance.h
@@ -0,0 +1,47 @@
+/*
+ * qofinstance.h
+ *
+ * Object instance holds many common fields that most
+ * gnucash objects use.
+ * 
+ * Copyright (C) 2003 Linas Vepstas <linas@linas.org>
+ */
+
+#ifndef QOF_INSTANCE_H
+#define QOF_INSTANCE_H
+#include "kvp_frame.h"
+
+/* --- type macros --- */
+/* cheesy, but will do for now, eventually should be more gtk-like */
+#define QOF_INSTANCE(object) (&((object)->inst))
+
+typedef struct QofInstance_s QofInstance;
+
+struct QofInstance_s
+{
+/*
+ * UNDER CONSTRUCTION!
+ * This is temp scaffolding for now,
+ * eventually, it should hold at least the following fields:
+ * (and maybe more, such as refrence counting...)
+ *
+   GUID guid;
+   QofBook * book;
+   int    editlevel;
+   gboolean  do_free;
+   gboolean  dirty;
+ */
+   KvpFrame *kvp_data;
+};
+
+/** Initialise the memory associated with an instance */
+void qof_instance_init (QofInstance *inst);
+
+/** release the data associated with this instance. Dont actually free 
+ * the memory associated with teh instance. */
+void qof_instance_release (QofInstance *inst);
+
+/** return the pointer to the kvp_data */
+KvpFrame* qof_instance_get_slots (QofInstance *);
+
+#endif /* QOF_INSTANCE_H */