preliminary work on object oriented tools (no useful macros yet)

git-svn-id: https://dev.arachne.cz/repos/cll1h/trunk@8 4bb87942-c103-4e5a-b51c-0ebff58f8515

diff --git a/objects/cobjects.c b/objects/cobjects.c
new file mode 100644 (file)
index 0000000..15f55d6
--- /dev/null
+++ b/objects/cobjects.c
@@ -0,0 +1,107 @@
+#include <stdio.h>
+#include <malloc.h>
+
+#define CONFEDERATION(IFACE,TYPE) struct IFACE *interface;struct TYPE *next
+#define CREATE(TYPE) (struct TYPE *)malloc(sizeof(struct TYPE))
+#define APPEND(TYPE,MEMBER,LIST) (MEMBER?MEMBER->next=(struct TYPE *)LIST:0,LIST=(struct TYPE *)MEMBER)
+
+struct Drawable_data
+{
+ CONFEDERATION(Drawable_interface,Drawable_data);
+};
+
+struct Drawable_interface
+{
+ void (*draw)(struct Drawable_data *);
+};
+
+struct Tri
+{
+ CONFEDERATION(Drawable_interface,Drawable_data);
+ int x1; int y1; int x2; int y2; int x3; int y3;
+};
+
+struct Rect
+{
+ CONFEDERATION(Drawable_interface,Drawable_data);
+ int x1; int y1; int x2; int y2;
+};
+
+void draw_tri(struct Drawable_data *v)
+{
+ struct Tri *t=(struct Tri *)v;
+ printf("%d,%d - %d,%d - %d,%d\n",t->x1,t->y1,t->x2,t->y2,t->x3,t->y3);
+};
+
+void draw_rect(struct Drawable_data *v)
+{
+ struct Rect *r=(struct Rect *)v;
+ printf("%d,%d - %d,%d\n",r->x1,r->y1,r->x2,r->y2);
+};
+
+struct Drawable_interface *init_tri_interface(void)
+{
+ struct Drawable_interface *i=CREATE(Drawable_interface); 
+ /* vsechny metody je bohuzel potreba bindnout rucne, neda se svitit... */
+ if(i) i->draw=draw_tri;
+ return i;
+}
+
+struct Drawable_interface *init_rect_interface(void)
+{
+ struct Drawable_interface *i=CREATE(Drawable_interface); 
+ /* vsechny metody je bohuzel potreba bindnout rucne, neda se svitit... */
+ if(i) i->draw=draw_rect;
+ return i;
+}
+
+struct Tri *create_tri(struct Drawable_interface *i, int x1, int y1, int x2, int y2, int x3, int y3)
+{
+ struct Tri *t=CREATE(Tri);
+ if(i && t) 
+ {
+  t->interface=i;
+  t->x1=x1;t->y1=y1;t->x2=x2;t->y2=y2;t->x3=x3;t->y3=y3;
+ }
+ return t;
+}
+
+struct Rect *create_rect(struct Drawable_interface *i, int x1, int y1, int x2, int y2)
+{
+ struct Rect *r=CREATE(Rect);
+ if(i && r) 
+ {
+  r->interface=i;
+  r->x1=x1;r->y1=y1;r->x2=x2;r->y2=y2;
+ }
+ return r;
+}
+
+int main(void) 
+{
+ struct Drawable_interface *tri_interface=init_tri_interface();
+ struct Drawable_interface *rect_interface=init_rect_interface();
+ struct Drawable_data *all=NULL,*one;
+ struct Tri *t;
+ struct Rect *r; 
+ 
+ r=create_rect(rect_interface,0,10,1,11);
+ APPEND(Drawable_data,r,all);
+ t=create_tri(tri_interface,0,0,0,4,3,0);
+ APPEND(Drawable_data,t,all);
+ r=create_rect(rect_interface,10,0,11,1);
+ APPEND(Drawable_data,r,all);
+
+ /* a nyni ... bylo to hodne prace, ale povedlo se ... ! */
+
+ for(one=all;one;one=one->next) (*(one->interface->draw))(one);
+
+ /* a nyni pro efekt jeste instatni nudlovy kod s kanci prichuti: */
+ 
+#define _(OBJECT,METHOD) OBJECT==NULL)?0:(*(OBJECT->interface->METHOD))(OBJECT
+#define FOR_EACH(ONE,ALL)  for(ONE=ALL;ONE;ONE=ONE->next)
+
+ FOR_EACH(one,all) (_(one,draw));
+
+ return 0;
+}