Hooks

diff --git a/lib/hooks.c b/lib/hooks.c
new file mode 100644 (file)
index 0000000..121df2d
--- /dev/null
+++ b/lib/hooks.c
@@ -0,0 +1,97 @@
+/*
+    hooks.c -- hooks management
+    Copyright (C) 2002 Guus Sliepen <guus@sliepen.warande.net>,
+                  2002 Ivo Timmermans <ivo@o2w.nl>
+
+    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, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+    $Id: hooks.c,v 1.1.2.1 2002/04/16 17:00:02 zarq Exp $
+*/
+
+#include "config.h"
+
+#include <assert.h>
+#include <stdarg.h>
+
+#include <avl_tree.h>
+#include <hooks.h>
+
+avl_tree_t *hooks_tree = NULL;
+
+static int hook_type_compare(const void *a, const void *b)
+{
+  return strcmp((const char*)a, (const char*)b);
+}
+
+static int hook_dummy_compare(const void *a, const void *b)
+{
+  if(a < b)
+    return -1;
+  if(a > b)
+    return 1;
+  return 0;
+}
+
+void run_hooks(const char *type, ...)
+{
+  avl_node_t *avlnode;
+  va_list args;
+  avl_tree_t *t;
+
+  if(!hooks_tree)
+    return;
+  t = avl_search(hooks_tree, type);
+  if(!t)
+    return;
+
+  va_start(args, fmt);
+  for(avlnode = t->head; avlnode; avlnode = avlnode->next)
+    {
+      assert(avlnode->data);
+      ((hook_function_t*)(avlnode->data))(type, args);
+    }
+  va_end(args);
+}
+
+void add_hook(const char *type, hook_function_t *hook)
+{
+  avl_tree_t *t;
+  
+  if(!hooks_tree)
+    hooks_tree = avl_alloc_tree(hook_type_compare, NULL);
+
+  t = avl_search(hooks_tree, type);
+  if(!t)
+    {
+      t = avl_alloc_tree(hook_dummy_compare, NULL);
+      avl_insert(log_hooks_tree, (void*)t);
+    }
+  
+  avl_insert(t, (void*)hook);
+}
+
+void del_hook(const char *type, hook_function_t *hook)
+{
+  avl_tree_t *t;
+
+  if(!hooks_tree)
+    return;
+
+  t = avl_search(hooks_tree, type);
+  if(!t)
+    return;
+
+  avl_delete(t, (void*)hook);
+}

diff --git a/lib/hooks.h b/lib/hooks.h
new file mode 100644 (file)
index 0000000..d190a73
--- /dev/null
+++ b/lib/hooks.h
@@ -0,0 +1,34 @@
+/*
+    hooks.h -- header file for hooks.c
+    Copyright (C) 2002 Guus Sliepen <guus@sliepen.warande.net>,
+                  2002 Ivo Timmermans <ivo@o2w.nl>
+
+    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, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+    $Id: hooks.h,v 1.1.2.1 2002/04/16 16:59:48 zarq Exp $
+*/
+
+#ifndef __TINC_HOOKS_H__
+#define __TINC_HOOKS_H__
+
+#include <stdarg.h>
+
+typedef void (hook_function_t)(const char*,va_list);
+
+void run_hooks(const char *type, ...);
+void add_hook(const char *type, hook_function_t *hook);
+void del_hook(const char *type, hook_function_t *hook);
+
+#endif /* __TINC_HOOKS_H__ */