Support the CD kernel call (stub) and add the TRUE_REG constant.

Would be nice to use this constant in pre-existing code.

svn-id: r50577

4 files changed, 21 insertions, 1 deletions

diff --git a/engines/sci/engine/kernel.cpp b/engines/sci/engine/kernel.cpp
index 58619986cb..47f7ac3bc8 100644
--- a/engines/sci/engine/kernel.cpp
+++ b/engines/sci/engine/kernel.cpp
@@ -425,6 +425,7 @@ static SciKernelMapEntry s_kernelMap[] = {
     { MAP_CALL(IsOnMe),            SIG_EVERYWHERE,           "iio.*",                NULL,            NULL },
     { MAP_CALL(MulDiv),            SIG_EVERYWHERE,           "iii",                  NULL,            NULL },
     { MAP_CALL(Text),              SIG_EVERYWHERE,           ".*",                   NULL,            NULL },
+    { MAP_CALL(CD),           	   SIG_EVERYWHERE,           ".*",                   NULL,            NULL },
     { NULL, NULL,                  SIG_EVERYWHERE,           NULL,                   NULL,            NULL }
 #endif
 };
diff --git a/engines/sci/engine/kernel.h b/engines/sci/engine/kernel.h
index a3cf7b5f91..cb66aa9f4d 100644
--- a/engines/sci/engine/kernel.h
+++ b/engines/sci/engine/kernel.h
@@ -449,6 +449,7 @@ reg_t kList(EngineState *s, int argc, reg_t *argv);
 reg_t kRobot(EngineState *s, int argc, reg_t *argv);
 reg_t kPlayVMD(EngineState *s, int argc, reg_t *argv);
 reg_t kIsOnMe(EngineState *s, int argc, reg_t *argv);
+reg_t kCD(EngineState *s, int argc, reg_t *argv);
 
 #endif
 
diff --git a/engines/sci/engine/kernel32.cpp b/engines/sci/engine/kernel32.cpp
index 2d492eb3ee..8b854dbca1 100644
--- a/engines/sci/engine/kernel32.cpp
+++ b/engines/sci/engine/kernel32.cpp
@@ -898,7 +898,7 @@ reg_t kInPolygon(EngineState *s, int argc, reg_t *argv) {
 reg_t kCreateTextBitmap(EngineState *s, int argc, reg_t *argv) {
 	// TODO: argument 0 is usually 0, and arguments 1 and 2 are usually 1
 	switch (argv[0].toUint16()) {
-	case 0:
+	case 0: {
 		if (argc != 4) {
 			warning("kCreateTextBitmap(0): expected 4 arguments, got %i", argc);
 			return NULL_REG;
@@ -907,6 +907,23 @@ reg_t kCreateTextBitmap(EngineState *s, int argc, reg_t *argv) {
 		Common::String text = s->_segMan->getString(readSelector(s->_segMan, object, SELECTOR(text)));
 		debug("kCreateTextBitmap: %s", text.c_str());
 	}
+	default:
+		warning("CreateTextBitmap(%d)", argv[0].toUint16());
+	}
+
+	return NULL_REG;
+}
+
+reg_t kCD(EngineState *s, int argc, reg_t *argv)
+{
+	// TODO: Stub
+	switch (argv[0].toUint16()) {
+	case 0:
+		// Return whether the contents of disc argv[1] is available.
+		return TRUE_REG;
+	default:
+		warning("CD(%d)", argv[0].toUint16());
+	}
 
 	return NULL_REG;
 }
diff --git a/engines/sci/engine/vm_types.h b/engines/sci/engine/vm_types.h
index 614b6f247d..828fba3d7d 100644
--- a/engines/sci/engine/vm_types.h
+++ b/engines/sci/engine/vm_types.h
@@ -87,6 +87,7 @@ enum {
 
 extern const reg_t NULL_REG;
 extern const reg_t SIGNAL_REG;
+extern const reg_t TRUE_REG;
 
 // Selector ID
 typedef int Selector;