From 4af4152da761b1cc91723fa60a6fdffd0c481a9f Mon Sep 17 00:00:00 2001
From: H.G. Muller <h.g.muller@hccnet.nl>
Date: Tue, 26 Feb 2013 17:15:39 +0100
Subject: [PATCH] Add -backupSettingsFile option

For better configurability of WinBoard, an option is added to optionally
read a settings file, namely if no other settings file (other than the
master file) was read so far. This can be used to import settings from
a previous version, without destroying its settings file.
---
 args.h       |    6 +++++-
 gtk/xboard.c |    1 +
 xaw/xboard.c |    1 +
 3 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/args.h b/args.h
index f6e755b..9533406 100644
--- a/args.h
+++ b/args.h
@@ -60,7 +60,7 @@
 typedef enum {
   ArgString, ArgInt, ArgFloat, ArgBoolean, ArgTrue, ArgFalse, ArgNone,
   ArgColor, ArgAttribs, ArgFilename, ArgBoardSize, ArgFont, ArgCommSettings,
-  ArgSettingsFilename, ArgTwo,
+  ArgSettingsFilename, ArgBackupSettingsFile, ArgTwo,
   ArgX, ArgY, ArgZ // [HGM] placement: for window-placement options stored relative to main window
 } ArgType;
 
@@ -490,6 +490,7 @@ ArgDescriptor argDescriptors[] = {
   { "at", ArgSettingsFilename, (void *) NULL, FALSE, INVALID },
   { "opt", ArgSettingsFilename, (void *) NULL, FALSE, INVALID },
   { "saveSettingsFile", ArgFilename, (void *) &settingsFileName, FALSE, INVALID },
+  { "backupSettingsFile", ArgBackupSettingsFile, (void *) &settingsFileName, FALSE, INVALID },
   { "saveSettingsOnExit", ArgBoolean, (void *) &saveSettingsOnExit, TRUE, (ArgIniType) TRUE },
   { "chessProgram", ArgBoolean, (void *) &chessProgram, FALSE, (ArgIniType) FALSE },
   { "cp", ArgTrue, (void *) &chessProgram, FALSE, INVALID },
@@ -1105,6 +1106,8 @@ ParseArgs(GetFunc get, void *cl)
       ASSIGN(*(char **) ad->argLoc, argValue);
       break;
 
+    case ArgBackupSettingsFile: // no-op if non-default settings-file already successfully read
+	if(strcmp(*(char**)ad->argLoc, SETTINGS_FILE)) break;
     case ArgSettingsFilename:
       {
 	if (ParseSettingsFile(argValue, (char**)ad->argLoc)) {
@@ -1537,6 +1540,7 @@ SaveSettings(char* name)
       PrintCommPortSettings(f, ad->argName);
     case ArgTwo:
     case ArgNone:
+    case ArgBackupSettingsFile:
     case ArgSettingsFilename: ;
     }
   }
diff --git a/gtk/xboard.c b/gtk/xboard.c
index a5b015c..c872973 100644
--- a/gtk/xboard.c
+++ b/gtk/xboard.c
@@ -644,6 +644,7 @@ PrintArg (ArgType t)
     case ArgString:   p = " STR"; break;
     case ArgBoolean:  p = " TF"; break;
     case ArgSettingsFilename:
+    case ArgBackupSettingsFile:
     case ArgFilename: p = " FILE"; break;
     case ArgX:        p = " Nx"; break;
     case ArgY:        p = " Ny"; break;
diff --git a/xaw/xboard.c b/xaw/xboard.c
index 7986db9..172fbac 100644
--- a/xaw/xboard.c
+++ b/xaw/xboard.c
@@ -934,6 +934,7 @@ PrintArg (ArgType t)
     case ArgString:   p = " STR"; break;
     case ArgBoolean:  p = " TF"; break;
     case ArgSettingsFilename:
+    case ArgBackupSettingsFile:
     case ArgFilename: p = " FILE"; break;
     case ArgX:        p = " Nx"; break;
     case ArgY:        p = " Ny"; break;
-- 
1.7.0.4