TEnv

Class Description

                                                                      
 TEnv                                                                 
                                                                      
 The TEnv class reads a config file, by default .rootrc. Three types  
 of .rootrc files are read: global, user and local files. The global  
 file resides in $ROOTSYS/etc, the user file in ~/ and the local file 
 in the current working directory.                                    
 The format of the .rootrc file is similar to the .Xdefaults format:  
                                                                      
   [+]<SystemName>.<RootName|ProgName>.<name>[(type)]:  <value>       
                                                                      
 Where <SystemName> is either Unix, WinNT, MacOS or Vms,              
 <RootName> the name as given in the TApplication ctor (or "RootApp"  
 in case no explicit TApplication derived object was created),        
 <ProgName> the current program name and <name> the resource name,    
 with optionally a type specification. <value> can be either a        
 string, an integer, a float/double or a boolean with the values      
 TRUE, FALSE, ON, OFF, YES, NO, OK, NOT. Booleans will be returned as 
 an integer 0 or 1. The options [+] allows the concatenation of       
 values to the same resouce name.                                     
                                                                      
 E.g.:                                                                
                                                                      
   Unix.Rint.Root.DynamicPath: .:$ROOTSYS/lib:~/lib                   
   myapp.Root.Debug:  FALSE                                           
   TH.Root.Debug: YES                                                 
   *.Root.MemStat: 1                                                  
                                                                      
 <SystemName> and <ProgName> or <RootName> may be the wildcard "*".   
 A # in the first column starts comment line.                         
                                                                      
 For the currently defined resources (and their default values) see   
 $ROOTSYS/etc/system.rootrc.                                          
                                                                      
 Note that the .rootrc config files contain the config for all ROOT   
 based applications.                                                  
                                                                      
 To add new entries to a TEnv:                                        
 TEnv env(".myfile");                                                 
 env.SetValue("myname","value");                                      
 env.SaveLevel(kEnvLocal);                                            
                                                                      
 All new entries will be saved in the file corresponding to the       
 first SaveLevel() command.  If Save() is used, new entries go        
 into the local file by default.