DREAMWEB: Port 'useopenbox' to C++

4 files changed, 36 insertions, 53 deletions

diff --git a/engines/dreamweb/dreamgen.cpp b/engines/dreamweb/dreamgen.cpp
index 0a0aa7a91c..851cca77fe 100644
--- a/engines/dreamweb/dreamgen.cpp
+++ b/engines/dreamweb/dreamgen.cpp
@@ -3590,58 +3590,6 @@ void DreamGenContext::notHeldError() {
 	putBackObStuff();
 }
 
-void DreamGenContext::useOpenBox() {
-	STACK_CHECK;
-	_cmp(data.byte(kWithobject), 255);
-	if (!flags.z())
-		goto openboxwith;
-	withWhat();
-	return;
-openboxwith:
-	al = data.byte(kWithobject);
-	ah = data.byte(kWithtype);
-	cl = 'C';
-	ch = 'U';
-	dl = 'P';
-	dh = 'F';
-	compare();
-	if (flags.z())
-		goto destoryopenbox;
-	al = data.byte(kWithobject);
-	ah = data.byte(kWithtype);
-	cl = 'C';
-	ch = 'U';
-	dl = 'P';
-	dh = 'E';
-	compare();
-	if (flags.z())
-		goto openboxwrong;
-	showFirstUse();
-	return;
-destoryopenbox:
-	_inc(data.byte(kProgresspoints));
-	cx = 300;
-	al = 37;
-	showPuzText();
-	al = data.byte(kWithobject);
-	getExAd();
-	es.byte(bx+15) = 'E'-'A';
-	data.word(kWatchingtime) = 140;
-	data.word(kReeltowatch) = 105;
-	data.word(kEndwatchreel) = 181;
-	data.byte(kWatchspeed) = 1;
-	data.byte(kSpeedcount) = 1;
-	al = 4;
-	turnPathOn();
-	data.byte(kGetback) = 1;
-	return;
-openboxwrong:
-	cx = 300;
-	al = 38;
-	showPuzText();
-	putBackObStuff();
-}
-
 void DreamGenContext::useAltar() {
 	STACK_CHECK;
 	al = 'C';
diff --git a/engines/dreamweb/dreamgen.h b/engines/dreamweb/dreamgen.h
index bbdd70e455..7be848813e 100644
--- a/engines/dreamweb/dreamgen.h
+++ b/engines/dreamweb/dreamgen.h
@@ -488,7 +488,6 @@ public:
 
 	void identifyOb();
 	void runEndSeq();
-	void useOpenBox();
 	void clearBuffers();
 	void getObTextStart();
 	void checkObjectSize();
diff --git a/engines/dreamweb/stubs.h b/engines/dreamweb/stubs.h
index 2946327699..18d90ff499 100644
--- a/engines/dreamweb/stubs.h
+++ b/engines/dreamweb/stubs.h
@@ -333,6 +333,7 @@
 	void useLighter();
 	void useSLab();
 	void usePipe();
+	void useOpenBox();
 	void wheelSound();
 	void callHotelLift();
 	void useShield();
diff --git a/engines/dreamweb/use.cpp b/engines/dreamweb/use.cpp
index b8d7b7ca75..0ede2f485a 100644
--- a/engines/dreamweb/use.cpp
+++ b/engines/dreamweb/use.cpp
@@ -1341,4 +1341,39 @@ void DreamGenContext::usePipe() {
 	}
 }
 
+void DreamGenContext::useOpenBox() {
+	if (data.byte(kWithobject) == 255) {
+		withWhat();
+		return;
+	}
+
+	char cupEmpty[4] = { 'C', 'U', 'P', 'E' };	// TODO: convert to string with trailing zero
+	char  cupFull[4] = { 'C', 'U', 'P', 'F' };	// TODO: convert to string with trailing zero
+
+	if (compare(data.byte(kWithobject), data.byte(kWithtype), cupFull)) {
+		// Destroy open box
+		data.byte(kProgresspoints)++;
+		showPuzText(37, 300);
+		DynObject *exObject = getExAd(data.byte(kWithobject));
+		exObject->id[3] = 'E'-'A';	// CUPF (full cup) -> CUPE (empty cup)
+		data.word(kWatchingtime) = 140;
+		data.word(kReeltowatch) = 105;
+		data.word(kEndwatchreel) = 181;
+		data.byte(kWatchspeed) = 1;
+		data.byte(kSpeedcount) = 1;
+		turnPathOn(4);
+		data.byte(kGetback) = 1;
+		return;
+	}
+
+	if (compare(data.byte(kWithobject), data.byte(kWithtype), cupEmpty)) {
+		// Open box wrong
+		showPuzText(38, 300);
+		putBackObStuff();
+		return;
+	}
+
+	showFirstUse();
+}
+
 } // End of namespace DreamGen