TEnv
class description - source file - inheritance tree (.pdf)
private:
const char* Getvalue(const char* name) const
public:
TEnv(const char* name = "")
TEnv(const TEnv&)
virtual ~TEnv()
static TClass* Class()
Bool_t Defined(const char* name)
THashList* GetTable() const
virtual Int_t GetValue(const char* name, Int_t dflt)
virtual Double_t GetValue(const char* name, Double_t dflt)
virtual const char* GetValue(const char* name, const char* dflt) const
virtual TClass* IsA() const
virtual TEnvRec* Lookup(const char* n)
TEnv& operator=(const TEnv&)
virtual void Print(Option_t* option = "") const
virtual void PrintEnv(EEnvLevel level = kEnvAll) const
virtual void ReadFile(const char* fname, EEnvLevel level)
virtual void Save()
virtual void SaveLevel(EEnvLevel level)
virtual void SetValue(const char* name, const char* value, EEnvLevel level = kEnvChange, const char* type = "0")
virtual void SetValue(const char* name, EEnvLevel level = kEnvChange)
virtual void SetValue(const char* name, Int_t value)
virtual void SetValue(const char* name, Double_t value)
virtual void ShowMembers(TMemberInspector& insp, char* parent)
virtual void Streamer(TBuffer& b)
void StreamerNVirtual(TBuffer& b)
private:
THashList* fTable
TString fRcName
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.
TEnv(const char *name)
Create a resource table and read the (possibly) three resource files, i.e
$ROOTSYS/system<name> (or ROOTETCDIR/system<name>), $HOME/<name> and
./<name>. ROOT always reads ".rootrc" (in TROOT::InitSystem()). You can
read additional user defined resource files by creating addtional TEnv
object.
~TEnv()
Delete the resource table.
const char* Getvalue(const char *name)
Returns the character value for a named resouce.
Int_t GetValue(const char *name, Int_t dflt)
Returns the integer value for a resource. If the resource is not found
return the dflt value.
Double_t GetValue(const char *name, Double_t dflt)
Returns the dobule value for a resource. If the resource is not found
return the dflt value.
const char* GetValue(const char *name, const char *dflt)
Returns the character value for a named resouce. If the resource is
not found the dflt value is returned.
TEnvRec* Lookup(const char *name)
Loop over all resource records and return the one with name.
Return 0 in case name is not in the resoucre table.
void Print(Option_t *opt) const
Print all resources or the global, user or local resources separately.
void PrintEnv(EEnvLevel level) const
Print all resources for a certain level (global, user, local, changed).
void ReadFile(const char *fname, EEnvLevel level)
Read and parse the resource file for a certain level.
void Save()
Write the resource files for each level. The new files have the same
name as the original files. The old files are renamed to *.bak.
void SaveLevel(EEnvLevel level)
Write the resource file for a certain level.
void SetValue(const char *name, const char *value, EEnvLevel level,
const char *type)
Set the value of a resource or create a new resource.
void SetValue(const char *name, EEnvLevel level)
Set the value of a resource or create a new resource.
Use this method to set a resource like, "name=val".
If just "name" is given it will be interpreted as "name=1".
void SetValue(const char *name, Int_t value)
Set or create an integer resource value.
void SetValue(const char *name, double value)
Set or create a double resource value.
Inline Functions
THashList* GetTable() const
Bool_t Defined(const char* name)
TClass* Class()
TClass* IsA() const
void ShowMembers(TMemberInspector& insp, char* parent)
void Streamer(TBuffer& b)
void StreamerNVirtual(TBuffer& b)
TEnv TEnv(const TEnv&)
TEnv& operator=(const TEnv&)
Author: Fons Rademakers 22/09/95
Last update: root/base:$Name: $:$Id: TEnv.cxx,v 1.23 2005/11/11 09:24:24 rdm Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
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