1 files changed, 96 insertions, 0 deletions
diff --git a/Source/DOH/void.c b/Source/DOH/void.c
new file mode 100644
index 0000000..ed34da1
--- /dev/null
+++ b/Source/DOH/void.c
@@ -0,0 +1,96 @@
+/* ----------------------------------------------------------------------------- 
+ * void.c
+ *
+ *     Implements a "void" object that is really just a DOH container around
+ *     an arbitrary C object represented as a void *.
+ * 
+ * Author(s) : David Beazley (beazley@cs.uchicago.edu)
+ *
+ * Copyright (C) 1999-2000.  The University of Chicago
+ * See the file LICENSE for information on usage and redistribution.	
+ * ----------------------------------------------------------------------------- */
+
+char cvsroot_void_c[] = "$Id: void.c 9607 2006-12-05 22:11:40Z beazley $";
+
+#include "dohint.h"
+
+typedef struct {
+  void *ptr;
+  void (*del) (void *);
+} VoidObj;
+
+/* -----------------------------------------------------------------------------
+ * Void_delete()
+ *
+ * Delete a void object. Invokes the destructor supplied at the time of creation.
+ * ----------------------------------------------------------------------------- */
+
+static void Void_delete(DOH *vo) {
+  VoidObj *v = (VoidObj *) ObjData(vo);
+  if (v->del)
+    (*v->del) (v->ptr);
+  DohFree(v);
+}
+
+/* -----------------------------------------------------------------------------
+ * Void_copy()
+ *
+ * Copies a void object.  This is only a shallow copy. The object destruction
+ * function is not copied in order to avoid potential double-free problems.
+ * ----------------------------------------------------------------------------- */
+
+static DOH *Void_copy(DOH *vo) {
+  VoidObj *v = (VoidObj *) ObjData(vo);
+  return NewVoid(v->ptr, 0);
+}
+
+/* -----------------------------------------------------------------------------
+ * Void_data()
+ *
+ * Returns the void * stored in the object.
+ * ----------------------------------------------------------------------------- */
+
+static void *Void_data(DOH *vo) {
+  VoidObj *v = (VoidObj *) ObjData(vo);
+  return v->ptr;
+}
+
+static DohObjInfo DohVoidType = {
+  "VoidObj",			/* objname */
+  Void_delete,			/* doh_del */
+  Void_copy,			/* doh_copy */
+  0,				/* doh_clear */
+  0,				/* doh_str */
+  Void_data,			/* doh_data */
+  0,				/* doh_dump */
+  0,				/* doh_len */
+  0,				/* doh_hash    */
+  0,				/* doh_cmp */
+  0,				/* doh_equal    */
+  0,				/* doh_first    */
+  0,				/* doh_next     */
+  0,				/* doh_setfile */
+  0,				/* doh_getfile */
+  0,				/* doh_setline */
+  0,				/* doh_getline */
+  0,				/* doh_mapping */
+  0,				/* doh_sequence */
+  0,				/* doh_file  */
+  0,				/* doh_string */
+  0,				/* doh_reserved */
+  0,				/* clientdata */
+};
+
+/* -----------------------------------------------------------------------------
+ * NewVoid()
+ *
+ * Creates a new Void object given a void * and an optional destructor function.
+ * ----------------------------------------------------------------------------- */
+
+DOH *DohNewVoid(void *obj, void (*del) (void *)) {
+  VoidObj *v;
+  v = (VoidObj *) DohMalloc(sizeof(VoidObj));
+  v->ptr = obj;
+  v->del = del;
+  return DohObjMalloc(&DohVoidType, v);
+}