/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
-/* camel-provider.c : provider management */
+/* camel-provider.c : provider framework */
/*
*
- * Copyright (C) 1999 Bertrand Guiheneuf <Bertrand.Guiheneuf@inria.fr> .
+ * Author :
+ * Bertrand Guiheneuf <Bertrand.Guiheneuf@aful.org>
+ *
+ * Copyright 1999 International GNOME Support (http://www.gnome-support.com) .
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
*/
+/*
+ A provider can be added "by hand" or by loading a module.
+
+
+ Adding providers with modules.
+ ------------------------------
+
+ The modules are shared libraries which must contain the
+ function
+
+ CamelProvider *camel_provider_module_init ();
+
+ returning the provider object defined in the module
+
+
+*/
+
+/* FIXME: Shouldn't we add a version number to providers ? */
+
+#include "config.h"
+#include "camel-provider.h"
+#include "camel-log.h"
+
+
+static GList *_provider_list = NULL;
+static gchar *_last_error;
+
+static gint
+_provider_name_cmp (gconstpointer a, gconstpointer b)
+{
+ CamelProvider *provider_a = CAMEL_PROVIDER (a);
+ CamelProvider *provider_b = CAMEL_PROVIDER (b);
+
+ return strcmp ( provider_a->name, provider_b->name);
+}
+
+void
+camel_provider_register (CamelProvider *provider)
+{
+ GList *old_provider_node = NULL;
+
+ g_assert (provider);
+
+ if (_provider_list)
+ old_provider_node = g_list_find_custom (_provider_list, provider, _provider_name_cmp);
+
+ if (old_provider_node != NULL) {
+ /* camel_provider_unref (CAMEL_PROVIDER (old_provider_node->data)); */
+ old_provider_node->data = provider;
+ } else {
+ /* be careful, we use prepend here, so that last registered
+ providers come first */
+ _provider_list = g_list_prepend (_provider_list, provider);
+ }
+ /* camel_provider_ref (provider); */
+}
+
+
+const CamelProvider *
+camel_provider_register_as_module (const gchar *module_path)
+{
+
+ CamelProvider *new_provider = NULL;
+ GModule *new_module = NULL;
+ CamelProvider * (*camel_provider_module_init) ();
+ gboolean has_module_init;
+
+ CAMEL_LOG_FULL_DEBUG ("Entering CamelProvider::register_as_module\n");
+
+ g_return_val_if_fail (module_path, NULL);
+
+ if (!g_module_supported ()) {
+ CAMEL_LOG_WARNING ("CamelProvider::register_as_module module loading not supported on this system\n");
+ CAMEL_LOG_FULL_DEBUG ("Leaving CamelProvider::register_as_module\n");
+ return NULL;
+ }
+
+
+ new_module = g_module_open (module_path, 0);
+ if (!new_module) {
+ CAMEL_LOG_WARNING ("CamelProvider::register_as_module Unable to load module %s\n", module_path);
+ CAMEL_LOG_FULL_DEBUG ("Leaving CamelProvider::register_as_module\n");
+ return NULL;
+ }
+
+ has_module_init = g_module_symbol (new_module, "camel_provider_module_init", (gpointer *)&camel_provider_module_init);
+ if (!has_module_init){
+ CAMEL_LOG_WARNING ("CamelProvider::register_as_module loading of module %s failed,\n"
+ "\t Symbol camel_provider_module_init not defined in it\n", module_path);
+ CAMEL_LOG_FULL_DEBUG ("Leaving CamelProvider::register_as_module\n");
+ return NULL;
+ }
+
+ new_provider = camel_provider_module_init();
+ new_provider->gmodule = new_module;
+ camel_provider_register (new_provider);
+
+ CAMEL_LOG_FULL_DEBUG ("Leaving CamelProvider::register_as_module\n");
+ return new_provider;
+
+
+}
+
+
+
/*
+ be careful to this function, @a is expected to be
+ a provider, @b a protocol name (const gchar *)
+*/
+static gint
+_provider_protocol_find (gconstpointer a, gconstpointer b)
+{
+ CamelProvider *provider_a = CAMEL_PROVIDER (a);
+ const gchar *name_b = (const gchar *)b;
+
+ return g_strcasecmp ( provider_a->name, name_b);
+}
+
+/**
+ * camel_provider_get_for_protocol: get a registered provider for a protocol
+ * @protocol: protocol name (case insensitive)
+ * @type: provider type (transport, store, ...)
+ *
+ * Look into the list of registered provider if
+ * one correspond both to the protocol name
+ * and to the protocol type. When several providers
+ * exist for a same protocol, the last registered
+ * is returned.
+ *
+ * Return value: Matching provider or NULL if none exists.
+ **/
+const CamelProvider *
+camel_provider_get_for_protocol (const gchar *protocol, ProviderType type)
+{
+ CamelProvider *current_provider = NULL;
+ GList *current_provider_node;
+ gboolean protocol_is_found;
+ gboolean provider_is_found;
+
+ g_assert (protocol);
+ g_return_val_if_fail (_provider_list, NULL);
+
+ current_provider_node = _provider_list;
+ provider_is_found = FALSE;
+
+ while ((!provider_is_found) && current_provider_node) {
+ current_provider = (CamelProvider *)current_provider_node->data;
+
+ protocol_is_found = (g_strcasecmp (protocol, current_provider->protocol) == 0);
+ if (protocol_is_found)
+ provider_is_found = (current_provider->provider_type == type);
+
+ current_provider_node = current_provider_node->next;
+ }
- Here will be the routine to load providers (plugins)
- and register them */
+ if (provider_is_found) return current_provider;
+ else return NULL;
+}
projects / platform / upstream / evolution-data-server.git / blobdiff