DC: Specialize createConfig{Read,Write}Stream

 
Implement platform-specific variants of createConfigReadStream() 
and createConfigWriteStream(), instead of inheriting the BaseBackend 
definitions.  Nonstandard behavious is as follows: 
 
* createConfigWriteStream() always returns 0 (read-only filesystem) 
 
* createConfigReadStream() returns an empty MemoryReadStream instead 
  of NULL if scummvm.ini does not exist.  This is to make sure that 
  loadDefaultConfigFile() always clears out any old config data, as 
  I'll want to restart config parsing from scratch after a disc 
  swap.

svn-id: r51478

2 files changed, 14 insertions, 0 deletions

diff --git a/backends/platform/dc/dc.h b/backends/platform/dc/dc.h
index e87a0a8c90..057ab283cf 100644
--- a/backends/platform/dc/dc.h
+++ b/backends/platform/dc/dc.h
@@ -233,6 +233,9 @@ class OSystem_Dreamcast : private DCHardware, public BaseBackend, public Filesys
 
 
   Common::SaveFileManager *createSavefileManager();
+
+  Common::SeekableReadStream *createConfigReadStream();
+  Common::WriteStream *createConfigWriteStream();
 };
 
 
diff --git a/backends/platform/dc/dcmain.cpp b/backends/platform/dc/dcmain.cpp
index 5a9286093f..5fde919650 100644
--- a/backends/platform/dc/dcmain.cpp
+++ b/backends/platform/dc/dcmain.cpp
@@ -31,6 +31,7 @@
 #include "icon.h"
 #include "DCLauncherDialog.h"
 #include <common/config-manager.h>
+#include <common/stream.h>
 
 #include "backends/plugins/dc/dc-provider.h"
 #include "sound/mixer_intern.h"
@@ -206,6 +207,16 @@ void OSystem_Dreamcast::getTimeAndDate(TimeDate &td) const {
   td.tm_year = t.tm_year;
 }
 
+Common::SeekableReadStream *OSystem_Dreamcast::createConfigReadStream() {
+  Common::FSNode file("/scummvm.ini");
+  Common::SeekableReadStream *s = file.createReadStream();
+  return s? s : new Common::MemoryReadStream((const byte *)"", 0);
+}
+
+Common::WriteStream *OSystem_Dreamcast::createConfigWriteStream() {
+  return 0;
+}
+
 void DCHardware::dc_init_hardware()
 {
 #ifndef NOSERIAL