compat: implement tdestroy (GNU extension not available on OpenBSD).

[vlc] / compat / tdestroy.c

diff --git a/compat/tdestroy.c b/compat/tdestroy.c
new file mode 100644 (file)
index 0000000..1baeec2
--- /dev/null
+++ b/compat/tdestroy.c
@@ -0,0 +1,52 @@
+/*****************************************************************************
+ * tdestroy.c: GNU tdestroy() replacement
+ *****************************************************************************
+ * Copyright © 1998-2009 the VideoLAN project
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <search.h>
+
+typedef struct node_t
+{
+    void        *key;
+    struct node_t *left, *right;
+} node;
+
+static void tdestroy_recurse (node *root, __free_fn_t freefct)
+{
+    if (root->left != NULL)
+        tdestroy_recurse (root->left, freefct);
+    if (root->right != NULL)
+        tdestroy_recurse (root->right, freefct);
+    (*freefct) ((void *) root->key);
+    /* Free the node itself.  */
+    free (root);
+}
+
+void tdestroy (void *vroot, __free_fn_t freefct)
+{
+    node *root = (node *) vroot;
+    if (root != NULL) {
+        tdestroy_recurse (root, freefct);
+    }
+}
+