objects

commit 905864d9cc2dabc9f7465dcf8c0cae9a8fed8ed9
parent bebbad2b753d78de1ab7c075ba1bd67090fced7f
Author: Remy Noulin (Spartatek) <remy.noulin@spartatek.se>
Date:   Sun, 26 Feb 2017 10:23:47 +0100

add base class to detect class of unknown objects

main.c | 27 ++++++++++++++++++++++++++-
1 file changed, 26 insertions(+), 1 deletion(-)

Diffstat:
M
main.c
 | 
27
++++++++++++++++++++++++++-

1 file changed, 26 insertions(+), 1 deletion(-)
diff --git a/main.c b/main.c
@@ -6,17 +6,29 @@
 #define freeO(obj) obj.free(&obj)
 #define freeOPointer(obj) obj->free(&obj)
 #define deleteO(obj) obj->terminate(&obj)
+#define isOType(obj, className) ((baset *) obj)->type == className
 
+// Class: base
+typedef struct base baset;
+
+struct base { 
+  const char *type;
+};
 
 // Class: class
 typedef struct class classt;
+static const char classtName[] = "class";
 
 typedef void (*printt)(classt *self, char *string);
 typedef void (*freeClasstt)(classt *self);
 typedef void (*terminateClasstt)(classt **self);
 typedef classt* (*duplicateClasstt)(classt **self);
 
-struct class { 
+struct class {
+  // base class
+  const char *type;
+  // base class end
+
   int a;
   char *s;
   printt print;
@@ -50,6 +62,9 @@ void initiateclasst(classt *self) {
   self->a = 0;
   self->s = NULL;
   self->print = print;
+
+  // class name
+  self->type = classtName;
 }
 
 void freeclasst(classt *self) {
@@ -101,4 +116,14 @@ void main() {
   initiateAllocateclasst(&obj4);
   obj4->print(obj4, "\nOBJ 4\n");
   deleteO(obj4);
+
+  // unknown object
+  void *unObj = &obj3;
+  baset *o;
+  o = (baset *) unObj;
+  printf("\nObject type: %s\n", o->type);
+
+  if (isOType(unObj, classtName)) {
+    printf("Object type: %s\n", ((baset *) unObj)->type);
+  }
 }