BACKENDS: Add OSystem::getDefaultConfigFileName

This is used to provide default implementations for createConfigWriteStream
and createConfigReadStream, which can be used by most backends.

Note that backends can still override createConfigRead/WriteStream;
this could be useful if settings on some port are not stored in a
regular file (think 'Windows registry', for a hypothetical example).

1 files changed, 9 insertions, 2 deletions

diff --git a/common/system.h b/common/system.h
index 4b85f143b7..85771cf982 100644
--- a/common/system.h
+++ b/common/system.h
@@ -1015,7 +1015,7 @@ public:
 	 * ReadStream instance. It is the callers responsiblity to delete
 	 * the stream after use.
 	 */
-	virtual Common::SeekableReadStream *createConfigReadStream() = 0;
+	virtual Common::SeekableReadStream *createConfigReadStream();
 
 	/**
 	 * Open the default config file for writing, by returning a suitable
@@ -1024,7 +1024,14 @@ public:
 	 *
 	 * May return 0 to indicate that writing to config file is not possible.
 	 */
-	virtual Common::WriteStream *createConfigWriteStream() = 0;
+	virtual Common::WriteStream *createConfigWriteStream();
+
+	/**
+	 * Get the default file name (or even path) where the user configuration
+	 * of ScummVM will be saved.
+	 * Note that not all ports may use this.
+	 */
+	virtual Common::String getDefaultConfigFileName();
 
 	/**
 	 * Logs a given message.