public static File getMinecraftDir()
    {
        if (minecraftDir == null)
        {
            minecraftDir = getAppDir("minecraft");
        }

        return minecraftDir;
    }

    /**
     * gets the working dir (OS specific) for the specific application (which is always minecraft)
     */
    public static File getAppDir(String par0Str)
    {
        String var1 = System.getProperty("user.home", ".");
        File var2;

        switch (EnumOSHelper.field_90049_a[getOs().ordinal()])
        {
            case 1:
            case 2:
                var2 = new File(var1, '.' + par0Str + '/');
                break;
            case 3:
                String var3 = System.getenv("APPDATA");

                if (var3 != null)
                {
                    var2 = new File(var3, "." + par0Str + '/');
                }
                else
                {
                    var2 = new File(var1, '.' + par0Str + '/');
                }

                break;
            case 4:
                var2 = new File(var1, "Library/Application Support/" + par0Str);
                break;
            default:
                var2 = new File(var1, par0Str + '/');
        }

        if (!var2.exists() && !var2.mkdirs())
        {
            throw new RuntimeException("The working directory could not be created: " + var2);
        }
        else
        {
            return var2;
        }
    }

    public static EnumOS getOs()
    {
        String var0 = System.getProperty("os.name").toLowerCase();
        return var0.contains("win") ? EnumOS.WINDOWS : (var0.contains("mac") ? EnumOS.MACOS : (var0.contains("solaris") ? EnumOS.SOLARIS : (var0.contains("sunos") ? EnumOS.SOLARIS : (var0.contains("linux") ? EnumOS.LINUX : (var0.contains("unix") ? EnumOS.LINUX : EnumOS.UNKNOWN)))));
    }