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+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Functions to keep a listing of all modules in the system. Has its
+ * own file mostly for abstraction reasons, but is pretty simple
+ * otherwise.
+ *
+ * Authors:
+ * Ted Gould <ted@gould.cx>
+ * Lauris Kaplinski <lauris@kaplinski.com>
+ *
+ * Copyright (C) 2002-2004 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef SEEN_MODULES_DB_H
+#define SEEN_MODULES_DB_H
+
+#include <map>
+#include <list>
+#include <cstring>
+
+#include <glib.h>
+
+
+namespace Inkscape {
+namespace Extension {
+
+class Input;
+class Output;
+class Effect;
+class Extension;
+
+class DB {
+private:
+ /** A string comparison function to be used in the moduledict
+ to find the different extensions in the hash map. */
+ struct ltstr {
+ bool operator()(const char* s1, const char* s2) const {
+ if ( (s1 == nullptr) && (s2 != nullptr) ) {
+ return true;
+ } else if (s1 == nullptr || s2 == nullptr) {
+ return false;
+ } else {
+ return strcmp(s1, s2) < 0;
+ }
+ }
+ };
+ /** This is the actual database. It has all of the modules in it,
+ indexed by their ids. It's a hash table for faster lookups */
+ std::map <const char *, Extension *, ltstr> moduledict;
+ /** Maintain an ordered list of modules for generating the extension
+ lists via "foreach" */
+ std::list <Extension *> modulelist;
+
+ static void foreach_internal (gpointer in_key, gpointer in_value, gpointer in_data);
+
+public:
+ DB ();
+ Extension * get (const gchar *key) const;
+ void register_ext (Extension *module);
+ void unregister_ext (Extension *module);
+ void foreach (void (*in_func)(Extension * in_plug, gpointer in_data), gpointer in_data);
+
+private:
+ static void input_internal (Extension * in_plug, gpointer data);
+ static void output_internal (Extension * in_plug, gpointer data);
+ static void effect_internal (Extension * in_plug, gpointer data);
+
+public:
+ typedef std::list<Output *> OutputList;
+ typedef std::list<Input *> InputList;
+ typedef std::list<Effect *> EffectList;
+
+ InputList &get_input_list (InputList &ou_list);
+ OutputList &get_output_list (OutputList &ou_list);
+ EffectList &get_effect_list (EffectList &ou_list);
+}; /* class DB */
+
+extern DB db;
+
+} } /* namespace Extension, Inkscape */
+
+#endif // SEEN_MODULES_DB_H
+
+/*
+ Local Variables:
+ mode:c++
+ c-file-style:"stroustrup"
+ c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+ indent-tabs-mode:nil
+ fill-column:99
+ End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :