From 63ba3988fff08911d2fecbf4808f5514e2fd420f Mon Sep 17 00:00:00 2001
From: Filippos Karapetis
Date: Mon, 26 Dec 2011 16:10:28 +0200
Subject: DREAMWEB: Port 'transfertoex' to C++

---
 devtools/tasmrecover/tasm-recover |  1 +
 engines/dreamweb/dreamgen.cpp     | 41 ---------------------------------------
 engines/dreamweb/dreamgen.h       |  1 -
 engines/dreamweb/object.cpp       | 34 ++++++++++++++++++++++++++------
 engines/dreamweb/stubs.h          |  1 +
 5 files changed, 30 insertions(+), 48 deletions(-)

diff --git a/devtools/tasmrecover/tasm-recover b/devtools/tasmrecover/tasm-recover
index 9a46fb6151..00053ffadb 100755
--- a/devtools/tasmrecover/tasm-recover
+++ b/devtools/tasmrecover/tasm-recover
@@ -908,6 +908,7 @@ generator = cpp(context, "DreamGen", blacklist = [
 	'train',
 	'transferinv',
 	'transfertext',
+	'transfertoex',
 	'trapdoor',
 	'triggermessage',
 	'trysoundalloc',
diff --git a/engines/dreamweb/dreamgen.cpp b/engines/dreamweb/dreamgen.cpp
index 66438cfd04..9582ebe5a5 100644
--- a/engines/dreamweb/dreamgen.cpp
+++ b/engines/dreamweb/dreamgen.cpp
@@ -241,47 +241,6 @@ void DreamGenContext::getSetAd() {
 	es = data.word(kSetdat);
 }
 
-void DreamGenContext::transferToEx() {
-	STACK_CHECK;
-	emergencyPurge();
-	getExPos();
-	al = data.byte(kExpos);
-	push(ax);
-	push(di);
-	al = data.byte(kItemframe);
-	ah = 0;
-	bx = 16;
-	_mul(bx);
-	ds = data.word(kFreedat);
-	si = ax;
-	cx = 8;
-	_movsw(cx, true);
-	di = pop();
-	al = data.byte(kReallocation);
-	es.byte(di) = al;
-	es.byte(di+11) = al;
-	al = data.byte(kItemframe);
-	es.byte(di+1) = al;
-	es.byte(di+2) = 4;
-	es.byte(di+3) = 255;
-	al = data.byte(kLastinvpos);
-	es.byte(di+4) = al;
-	al = data.byte(kItemframe);
-	data.byte(kItemtotran) = al;
-	transferMap();
-	transferInv();
-	transferText();
-	al = data.byte(kItemframe);
-	ah = 0;
-	bx = 16;
-	_mul(bx);
-	ds = data.word(kFreedat);
-	si = ax;
-	ds.byte(si+2) = 254;
-	pickupConts();
-	ax = pop();
-}
-
 void DreamGenContext::pickupConts() {
 	STACK_CHECK;
 	al = ds.byte(si+7);
diff --git a/engines/dreamweb/dreamgen.h b/engines/dreamweb/dreamgen.h
index a292384826..0ecdf7210b 100644
--- a/engines/dreamweb/dreamgen.h
+++ b/engines/dreamweb/dreamgen.h
@@ -440,7 +440,6 @@ public:
 	void read();
 	void searchForString();
 	void getExAd();
-	void transferToEx();
 	void parser();
 	void transferConToEx();
 };
diff --git a/engines/dreamweb/object.cpp b/engines/dreamweb/object.cpp
index 10138acb78..daa45e67eb 100644
--- a/engines/dreamweb/object.cpp
+++ b/engines/dreamweb/object.cpp
@@ -446,8 +446,7 @@ void DreamGenContext::setPickup() {
 	if (data.byte(kObjecttype) != kExObjectType) {
 		data.byte(kItemframe) = data.byte(kCommand);
 		data.byte(kOpenedob) = 255;
-		transferToEx();
-		data.byte(kItemframe) = al;
+		data.byte(kItemframe) = transferToEx();
 		data.byte(kObjecttype) = kExObjectType;
 		DynObject *object = getExAd(data.byte(kItemframe));
 		object->mapad[0] = 20;
@@ -964,8 +963,7 @@ void DreamGenContext::outOfOpen() {
 	data.byte(kItemframe)  = objectId & 0xFF;
 
 	if (data.byte(kObjecttype) != 4) {
-		transferToEx();
-		data.byte(kItemframe) = al;
+		data.byte(kItemframe) = transferToEx();
 		data.byte(kObjecttype) = 4;
 	}
 
@@ -1021,8 +1019,7 @@ void DreamGenContext::swapWithOpen() {
 	data.byte(kItemframe)  = objectId & 0xFF;
 
 	if (data.byte(kObjecttype) != 4) {
-		transferToEx();
-		data.byte(kItemframe) = al;
+		data.byte(kItemframe) = transferToEx();
 		data.byte(kObjecttype) = 4;
 	}
 
@@ -1059,4 +1056,29 @@ uint16 DreamBase::findOpenPos() {
 	return pos * 2 + kOpeninvlist;	// return the object position in the inventory data
 }
 
+byte DreamGenContext::transferToEx() {
+	emergencyPurge();
+	getExPos();
+	byte pos = data.byte(kExpos);
+	DynObject *exObject = getExAd(pos);
+	DynObject *freeObject = getFreeAd(data.byte(kItemframe));
+	memcpy(exObject, freeObject, sizeof(DynObject));
+	exObject->currentLocation = data.byte(kReallocation);
+	exObject->initialLocation = data.byte(kReallocation);
+	exObject->index = data.byte(kItemframe);
+	exObject->mapad[0] = 4;
+	exObject->mapad[1] = 255;
+	exObject->mapad[2] = data.byte(kLastinvpos);
+	data.byte(kItemtotran) = data.byte(kItemframe);
+	transferMap();
+	transferInv();
+	transferText();
+	freeObject = getFreeAd(data.byte(kItemframe));
+	freeObject->mapad[0] = 254;
+	ds = data.word(kFreedat);
+	si = data.byte(kItemframe);
+	pickupConts();
+	return pos;
+}
+
 } // End of namespace DreamGen
diff --git a/engines/dreamweb/stubs.h b/engines/dreamweb/stubs.h
index a03dbc2fb6..9bbf3b3c40 100644
--- a/engines/dreamweb/stubs.h
+++ b/engines/dreamweb/stubs.h
@@ -139,5 +139,6 @@
 	void swapWithOpen();
 	void swapWithInv();
 	void searchForFiles();
+	byte transferToEx();
 
 #endif
-- 
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