more work on `operate.cc`

1 files changed, 56 insertions, 0 deletions

diff --git a/src/moveuse.cc b/src/moveuse.cc
new file mode 100644
index 0000000..f11fffa
--- /dev/null
+++ b/src/moveuse.cc
@@ -0,0 +1,56 @@
+#include "operate.hh"
+
+// NOTE(fusion): Oh no.
+void ChangeObject(Object Obj, ObjectType NewType, uint32 Value){
+	if(!Obj.exists()){
+		error("ChangeObject: Übergebenes Objekt existiert nicht (1, NewType=%d).\n", NewType.TypeID);
+		return;
+	}
+
+	Object Con = Obj.getContainer();
+	while(true){
+		if(!Obj.exists()){
+			error("ChangeObject: Übergebenes Objekt existiert nicht (2, NewType=%d).\n", NewType.TypeID);
+			return;
+		}
+
+		try{
+			// NOTE(fusion): `Change` requires CUMULATIVE objects to have AMOUNT
+			// equal to one or it fails with `SPLITOBJECT`.
+			ObjectType ObjType = Obj.getObjectType();
+			if(ObjType.getFlag(CUMULATIVE)){
+				uint32 Amount = Obj.getAttribute(AMOUNT);
+				if(Amount > 1){
+					Move(0, Obj, Con, Amount - 1, true, NONE);
+				}
+			}
+
+			Change(Obj, NewType, Value);
+			return;
+		}catch(RESULT r){
+			if(!Obj.exists()){
+				error("ChangeObject: Übergebenes Objekt existiert nicht (3, NewType=%d).\n", NewType.TypeID);
+				return;
+			}
+
+			if(r == CONTAINERFULL){
+				Con = GetMapContainer(Obj);
+			}else if(r == TOOHEAVY){
+				Object MapCon = GetMapContainer(Obj);
+				Move(0, Obj, MapCon, -1, true, NONE);
+			}else if(r == NOROOM){
+				if(!Obj.getObjectType().getFlag(CUMULATIVE)
+						|| Obj.getAttribute(AMOUNT) <= 1){
+					throw;
+				}
+
+				// TODO(fusion): Why do we use `Con` with `GetMapContainer` here?
+				uint32 Amount = Obj.getAttribute(AMOUNT);
+				Object MapCon = GetMapContainer(Con);
+				Move(0, Obj, MapCon, Amount - 1, true, NONE);
+			}else{
+				throw;
+			}
+		}
+	}
+}