SCI: Added sanity checks for SCI3 scripts bigger than 64KB

- Extended the "verify_scripts" console command for SCI3 scripts
- Added a check for such large scripts when scripts are loaded, with
an error for now, till a mechanism to support such scripts with a
16-bit addressing scheme is in place (e.g. overlaying, or splitting
scripts). Either way, such scripts should span over more than one segment

svn-id: r54304

1 files changed, 9 insertions, 0 deletions

diff --git a/engines/sci/engine/script.cpp b/engines/sci/engine/script.cpp
index 6216e1b201..424102a90d 100644
--- a/engines/sci/engine/script.cpp
+++ b/engines/sci/engine/script.cpp
@@ -113,6 +113,15 @@ void Script::init(int script_nr, ResourceManager *resMan) {
 			error("Script and heap sizes combined exceed 64K. This means a fundamental "
 					"design bug was made regarding SCI1.1 and newer games.\n"
 					"Please report this error to the ScummVM team");
+	} else if (getSciVersion() == SCI_VERSION_3) {
+		// Check for scripts over 64KB. These won't work with the current 16-bit address
+		// scheme. We need an overlaying mechanism, or a mechanism to split script parts
+		// in different segments to handle these. For now, simply stop when such a script
+		// is found.
+		// TODO: Remove this once such a mechanism is in place
+		if (script->size > 65535)
+			error("TODO: SCI script %d is over 64KB - it's %d bytes long. This can't "
+			      "be handled at the moment, thus stopping", script_nr, script->size);
 	}
 }