mirror of https://github.com/Gnucash/gnucash
This allows for - other engine consumers to use the features test as well (think CuteCash, python bindings,...) - a central point for developers to check for feature definitions - a central point to manage all feature related code BP git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@21978 57a11ea4-9604-0410-9ed3-97b8803252fdpull/1/head
Geert Janssens
14 years ago
parent
54d2786216
commit
4119c0f2da
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/********************************************************************\
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* gnc-features.c -- manage GnuCash features table *
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* Copyright (C) 2011 Derek Atkins <derek@ihtfp.com> *
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* Copyright (C) 2012 Geert Janssens <geert@kobaltwit.be> *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License as *
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* published by the Free Software Foundation; either version 2 of *
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* the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License*
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* along with this program; if not, write to the Free Software *
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
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* *
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\********************************************************************/
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#include "config.h"
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#include <glib.h>
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#include <glib/gi18n.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include "gnc-engine.h"
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#include "gnc-features.h"
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/* This static indicates the debugging module that this .o belongs to. */
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static QofLogModule log_module = GNC_MOD_GUI;
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/********************************************************************\
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\********************************************************************/
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static void features_test(const gchar *key, KvpValue *value, gpointer data)
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{
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GList** unknown_features = (GList**) data;
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char* feature_desc;
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g_assert(data);
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/* XXX: test if 'key' is an unknown feature. */
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/* Yes, it is unknown, so add the description to the list: */
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feature_desc = kvp_value_get_string(value);
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g_assert(feature_desc);
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*unknown_features = g_list_prepend(*unknown_features, feature_desc);
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}
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/*
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* Right now this is done by a KVP check for a features table.
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* Currently we don't know about any features, so the mere
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* existence of this KVP frame means we have a problem and
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* need to tell the user.
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*
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* returns a message to display if we found unknown features, NULL if we're okay.
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*/
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gchar *test_unknown_features(QofSession* new_session)
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{
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KvpFrame *frame = qof_book_get_slots (qof_session_get_book (new_session));
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KvpValue *value;
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g_assert(frame);
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value = kvp_frame_get_value(frame, "features");
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if (value)
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{
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GList* features_list = NULL;
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frame = kvp_value_get_frame(value);
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g_assert(frame);
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/* Iterate over the members of this frame for unknown features */
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kvp_frame_for_each_slot(frame, &features_test, &features_list);
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if (features_list)
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{
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GList *i;
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char* msg = g_strdup(
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_("This Dataset contains features not supported by this "
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"version of GnuCash. You must use a newer version of "
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"GnuCash in order to support the following features:"
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));
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for (i = features_list; i; i = i->next)
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{
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char *tmp = g_strconcat(msg, "\n* ", _(i->data), NULL);
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g_free (msg);
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msg = tmp;
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}
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g_free(msg);
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g_list_free(features_list);
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return msg;
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}
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}
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return NULL;
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}
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@ -0,0 +1,50 @@
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/********************************************************************\
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* gnc-features.h -- manage GnuCash features table *
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* Copyright (C) 2011 Derek Atkins <derek@ihtfp.com> *
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* Copyright (C) 2012 Geert Janssens <geert@kobaltwit.be> *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License as *
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* published by the Free Software Foundation; either version 2 of *
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* the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License*
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* along with this program; if not, write to the Free Software *
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
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* *
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\********************************************************************/
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/** @addtogroup Utils Utility functions
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@{ */
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/** @addtogroup UtilFeature Features
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* @{ */
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/** @file gnc-features.h
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* @brief Utility functions for file access
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* @author Copyright (C) 2011 Derek Atkins <derek@ihtfp.com>
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* @author Copyright (C) 2012 Geert Janssens <geert@kobaltwit.be>
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*
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* These functions help you to manage features that GnuCash supports.
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* This is mainly used to prevent older GnuCash versions from opening
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* datasets with data they aren't capable of processing properly.
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*/
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#ifndef GNC_FEATURES_H
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#define GNC_FEATURES_H
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/**
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* Test if the current session relies on features we don't know.
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*
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* Returns a message to display if we found unknown features, NULL if we're okay.
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*/
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gchar *test_unknown_features(QofSession* new_session);
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#endif /* GNC_FEATURES_H */
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/** @} */
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/** @} */
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