New GetArg features: allow --, and booleans can be -foo or -nofoo

src/util.cpp

@@ -475,9 +475,37 @@ void ParseParameters(int argc, const char*const argv[])
         #endif
         if (psz[0] != '-')
             break;
+
         mapArgs[psz] = pszValue;
         mapMultiArgs[psz].push_back(pszValue);
     }
+
+    // New 0.6 features:
+    BOOST_FOREACH(const PAIRTYPE(string,string)& entry, mapArgs)
+    {
+        string name = entry.first;
+
+        //  interpret --foo as -foo (as long as both are not set)
+        if (name.find("--") == 0)
+        {
+            std::string singleDash(name.begin()+1, name.end());
+            if (mapArgs.count(singleDash) == 0)
+                mapArgs[singleDash] = entry.second;
+            name = singleDash;
+        }
+
+        //  interpret -nofoo as -foo=0 (and -nofoo=0 as -foo=1, as long as -foo not set)
+        if (name.find("-no") == 0)
+        {
+            std::string positive("-");
+            positive.append(name.begin()+3, name.end());
+            if (mapArgs.count(positive) == 0)
+            {
+                bool value = !GetBoolArg(name);
+                mapArgs[positive] = (value ? "1" : "0");
+            }
+        }
+    }
 }
 
 std::string GetArg(const std::string& strArg, const std::string& strDefault)