1 files changed, 55 insertions, 0 deletions
diff --git a/class.c b/class.c
new file mode 100644
index 0000000..9bca515
--- /dev/null
+++ b/class.c
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+/* C class and object types functions.
+ *
+ * Copyright 2013, Michael Cohen <sucdette@gmail.com>.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "misc.h"
+#include "class.h"
+
+#define BUFF_SIZE 1024
+
+// Noone should instantiate Object directly. this should be already
+// allocated therefore:
+
+DLL_PUBLIC void Object_init(Object this) {
+  this->__class__ = &__Object;
+  this->__super__ = NULL;
+};
+
+struct Object_t __Object = {
+  &__Object,                 //.__class__
+  &__Object,                 //.__super__
+  "Object",                  //.__name__
+  "",                        //.__doc__
+  sizeof(struct Object_t),   //.__size
+  NULL   //.__extension
+};
+
+int issubclass(Object obj, Object class) {
+  obj = obj->__class__;
+  while(1) {
+    if(obj == class->__class__)
+      return 1;
+
+    obj=obj->__super__;
+
+    if(obj == &__Object || obj==NULL)
+      return 0;
+  };
+};
+
+void unimplemented(Object self) {
+  printf("%s contains unimplemented functions.. is it an abstract class?\n", NAMEOF(self));
+  abort();
+};