Revert "Remove R77 save logic, make most R77 settings temporary ot exclude them from persistence."

This reverts commit 51f38840e0.

src/emucore/Settings.cxx

@@ -608,12 +608,10 @@ void Settings::setValue(const string& key, const Variant& value)
 void Settings::setPermanent(const string& key, const Variant& value)
 {
   myPermanentSettings[key] = value;
-  myTemporarySettings.erase(key);
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 void Settings::setTemporary(const string& key, const Variant& value)
 {
   myTemporarySettings[key] = value;
-  myPermanentSettings.erase(key);
 }

src/unix/r77/SettingsR77.cxx

@@ -29,42 +29,42 @@
 SettingsR77::SettingsR77()
   : Settings()
 {
-  setTemporary("video", "opengles2");
-  setTemporary("vsync", "true");
+  setPermanent("video", "opengles2");
+  setPermanent("vsync", "true");
 
-  setTemporary("tia.zoom", "3");
-  setTemporary("tia.fs_stretch", "false");  // start in 4:3 by default
+  setPermanent("tia.zoom", "3");
+  setPermanent("tia.fs_stretch", "false");  // start in 4:3 by default
 
-  setTemporary("audio.buffer_size", "6");
+  setPermanent("audio.buffer_size", "6");
   setPermanent("audio.enabled", "1");
-  setTemporary("audio.fragment_size", "512");
-  setTemporary("audio.headroom", "5");
-  setTemporary("audio.preset", "1");
-  setTemporary("audio.resampling_quality", "2");
-  setTemporary("audio.sample_rate", "48000");
+  setPermanent("audio.fragment_size", "512");
+  setPermanent("audio.headroom", "5");
+  setPermanent("audio.preset", "1");
+  setPermanent("audio.resampling_quality", "2");
+  setPermanent("audio.sample_rate", "48000");
   setPermanent("audio.stereo", "0");
   setPermanent("audio.volume", "100");
 
-  setTemporary("romdir", "/mnt/games");
-  setTemporary("snapsavedir", "/mnt/stella/snapshots");
-  setTemporary("snaploaddir", "/mnt/stella/snapshots");
+  setPermanent("romdir", "/mnt/games");
+  setPermanent("snapsavedir", "/mnt/stella/snapshots");
+  setPermanent("snaploaddir", "/mnt/stella/snapshots");
 
-  setTemporary("launcherres", "1280x720");
-  setTemporary("launcherfont", "large");
-  setTemporary("romviewer", "2");
-  setTemporary("exitlauncher", "true");
+  setPermanent("launcherres", "1280x720");
+  setPermanent("launcherfont", "large");
+  setPermanent("romviewer", "2");
+  setPermanent("exitlauncher", "true");
 
   setTemporary("minimal_ui", true);
-  setTemporary("basic_settings", true);
+  setPermanent("basic_settings", true);
 
   setPermanent("dev.settings", false);
   // record states for 60 seconds
   setPermanent("plr.timemachine", true);
-  setTemporary("plr.tm.size", 60);
-  setTemporary("plr.tm.uncompressed", 60);
-  setTemporary("plr.tm.interval", "1s");
+  setPermanent("plr.tm.size", 60);
+  setPermanent("plr.tm.uncompressed", 60);
+  setPermanent("plr.tm.interval", "1s");
 
-  setTemporary("threads", "1");
+  setPermanent("threads", "1");
 
   // all TV effects off by default (aligned to StellaSettingsDialog defaults!)
   setPermanent("tv.filter", "1"); // RGB
@@ -72,3 +72,30 @@ SettingsR77::SettingsR77()
   setPermanent("tv.phosblend", "45"); // level 6
   setPermanent("tv.scanlines", "18"); // level 3
 }
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+bool SettingsR77::saveConfigFile(const string& cfgfile) const
+{
+  // Almost no settings can be changed, so we completely disable saving
+  // most of them.  This may also fix reported issues of the config file
+  // becoming corrupt.
+  //
+  // There are currently only a few settings that can be changed
+  // These will be expanded as more support is added
+
+  ofstream out(cfgfile);
+  if(!out || !out.is_open())
+    return false;
+
+  out << "fullscreen = " << getString("fullscreen") << endl;
+  out << "lastrom = " << getString("lastrom") << endl;
+  out << "tia.fs_stretch = " << getString("tia.fs_stretch") << endl;
+//   out << "keymap = " << getString("keymap") << endl;
+//   out << "joymap = " << getString("joymap") << endl;
+
+  out.flush();
+  out.close();
+  system("/bin/fsync /mnt/stella/stellarc&");
+
+  return true;
+}

src/unix/r77/SettingsR77.hxx

@@ -35,6 +35,9 @@ class SettingsR77 : public Settings
     explicit SettingsR77();
     virtual ~SettingsR77() = default;
 
+  protected:
+    bool saveConfigFile(const string& cfgfile) const;
+
   private:
     // Following constructors and assignment operators not supported
     SettingsR77(const SettingsR77&) = delete;