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For more info about Float16_t see TBufferFile::WriteFloat16.


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- change method IsSupportStatement() to HasStatement()


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directory. These rootmap files are generated automatically when the
associated LinkDef file(s) or the config/Makefile.depend is changed.
No more "make map" needed, rootmaps are always up-to-date!


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1. While name of the class is changed, one should use TDirectoryFile class instead of
   TDirectory at the moment, then new directory object is created.
2. Appropriate change done in non-binary part of TDirectoryFile::Streamer() that old version of
   class can be read.


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the recent changes in TBuffer.


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This is the continuation of the effort to structure libCore into
independent sub-packages.

A new class TDirectoryFile is introduced. It derives from TDirectory
and takes from TDirectory all the I/O functions.

All the classes (except TROOT) deriving from TDirectory are now derived
from TDirectoryFile. TDirectory keeps the previous API for back compatibility
with several functions made virtual.

This change should be back compatible, except if the user codes creates
a file sub-directory by direct invokation of the TDirectory constructor
instead of calling TDirectory::mkdir.

Note that TMapFile is not yet fully adapted to the new scheme.


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CVs been changed into a pure abstract interface.
The concrete implementation is in the new class TBufferFile.
All classes previously deriving from TBuffer derive now from TBufferFile, ie

  TBuffer  <- TBufferFile  <- TMessage
                           <- TBufferXML
                           <- TBufferSQL
                           <- TBufferSQL2

Because there are several problems with C++ operators overloading,
The I/O operators are defined in TBuffer. These are inline functions
calling C++ virtual functions defined in TBuffer and overloaded
by TBufferFile and all other derived classes when necessary.

The previous implementation of TBuffer.h included <vector> and Bytes.h.
The two include statements have been moved to TBufferFile.h. As a result the
compilation of the ROOT system is now slightly faster and a big bonus
is that changes in TBufferFile or Bytes.h will affect only TBufferFile
and will not force the recompilation of the entire system.
This change has some side-effects. If you assumed that include <vector>
was done by TBuffer.h, you may have to specify this include directly
in your class. This was the case for a few ROOT classes.


 : ----------------------------------------------------------------------


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   TMath::Abs, TMath::Min, TMath::Max, TMath::Sign, TMath::Range
These functions are unfortunately not defined in a standard way in std::

This include is referenced by a new version of TMath.h.
As a result, TMath.h is back compatible with the previous version.

TMathBase.h is used in place of TMath.h in all the classes
that will go into the future miniCore library.
TMath.h and the TMath implementation will go into a new math sub-directory.

TString.h uses TMathBase.h instead of TMath.h.
As a result, it was necessary to include "TMath.h" in some classes
assuming that TMath was included via TString and using other functions
than the ones defined in TMathBase.h
 ----------------------------------------------------------------------


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-Rename class TFilePrefetch -> TFileCacheRead
-Rename class TTreeFilePrefetch -> TTreeCache
-Add new class TFileCacheWrite that implements automatic caching
 when writing network files. This class replaces the previous class TCache.
-old TCache class deleted.
-TFileCacheRead can read buffers from the wite cache in TFileCacheWrite.
-As a result TFile::UseCache is obsolete. The function is kept for
  backward compatibility.
-Remove references to TCache from TXMLFile, TSQLFile, TwebFile, TNetFile
-remove pointer TFile::fCache
-Add pointers TFile::fCacheRead and TFile::fCacheWrite
-Remove members fMaxCacheSize and fPageSize from TChain

NOTE that it is recommended to
  rm -f base/src/*.d base/src/*.o
  rm -f net/src/*.d  net/src/*.o
  rm -f tree/src/*.d tree/src/*.o


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1. Support for MySQL version 3.2.x and 4.0 enabled again. For that old MySQL versions TSQLStatement is not supported.
2. Small fix in TSQLFile. With old MySQL versions it does not try to use TSQLStatement class.
3. Enabling/disabling error output for TSQLStatement class.
4. Fix in error handling in TMySQLServer::Statement() method. Previousely error code was not correctly stored.


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1. Implementation of TDirectory I/O for TSQLFile and TXMLFile
2. In TSQLFile identifier length is now controled.
   Important for Oracle, where table or column name cannot be more than 32 symbols.
3. Adding usage of TSQLStatement class where possible.
4. Small performance improvment.


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1. Streamer info are now stored/read from SQL database.
2. Usage of TSQLStatement class (speed up for Oracle)
3. Tested and adjusted for ODBC plugin


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This patch fixes 2 MSVC8 warnings.


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Warning:  This means that some file that relied on the indirect
inclusion of these header file might now fail to compile with
an error message mention that gROOT is no known or that TClass,
TROOT or TStreamerInfo is incompletely defined.  Simply add the
proper include directive.


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Dictionary G__%.o: G__%.cxx rules now in main Makefile instead of Module.mk's
=> changes in Module.mk.

First Module.mk's included, then Makefile.precomp - we need ALLHDRS defined

Split $(PCHEXTRAOBJ) and $(PCHFILE) rules - fixes clash with make -j2

Define CINTCXXFLAGS:= - otherwise they will contain PCHCXXFLAGS via
their definition as a copy of CXXFLAGS.

MSVC: prevent LNK4206 linker warning (-Yl...)


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Move CreateKey from TDirectory to TFile
Here is also optimisation of SQL statements and adjustement for Oracle.
Implementation of ClassBegin()/ClassMember()/ClassEnd() methdos for TBufferSQL2 and TBufferXML.
I also implementation for ClassMemeber() method for case of "raw:data" for SQL and XML cases.


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Update to sql and xml following the chnage to reduce reliance
on gFile and gDirectory


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handle in a consistent way the new rootcint options -cint (default),
-reflex and -gccxml. The type of dictionary to be used can be specified
like: ./configure --with-dicttype=reflex. Notice that this option is
there only for the developers working on the migration to the new
dictionary system.


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in case we have gmake >= 3.80 we can use the new | (order) syntax where
all dependencies after the | are required to be there but not trigger
execution of the rule. This should greatly enhance the build experience
on Win32 and AIX (platforms that need the EXPLICITLINK option).


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group the TSQLFile classes into libSQL which acts as a normal TFile plugin.


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This patch allows more clear representation of TClonesArray data in TSQLFile.

It also solves problem of correct saving of array of objects in TSQLFile.
I redefine in TBufferSQL2 following functions:

void WriteFastArray(void* start, const TClass* cl, Int_t n, TMemberStreamer* s)
Int_t WriteFastArray(void** startp, const TClass* cl, Int_t n, Bool_t isPreAlloc, TMemberStreamer* s)
void ReadFastArray(void* start, const TClass* cl, Int_t n = 1, TMemberStreamer* s = 0)
void ReadFastArray(void** startp, const TClass* cl, Int_t n = 1, Bool_t isPreAlloc = kFALSE, TMemberStreamer* s = 0)

In these functions I make replacement which I propose before - instead of cl->Streamer(buf, obj),
I use buf->StreamObject(obj, cl) ("parenthesis" arround cl->Streamer(buf, obj) call)
In case of TBufferSQL2 I treat StreamObject() as WriteObject()/ReadObject()
calls. Therefore, I can solve problem with objects array. Now it is easy to produce one column for
each array element.


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I made following modification:

1. Usage of table indexes. By default, they created only for basic tables: KeysTable and ObjectsTable.
   It is possible to configure TSQLFile to create indexes also for other type of tables or disable indexes at all.

2. Use of transaction. Now by default this option on and protect storage of object data to datatables.
   For some types of MySQL tables transaction are not supported, therefore I include in configurations
   possibility to setup type of table which should be used.

3. Configurations. For all kind of configuration I create small table.
   Configurations can be changed only when TSQLFile is created with option "CREATE" or "RECREATE".
   In that case configurations can be changed until first write operation.

4. Locking. I did not use "native" database locking mechnism while they are very different in MySQL and Oracle and
   may differ also in other SQL database. I put in Configuration table one flag, which says if database is already
   opened for writing by other TSQLFile instance and prevent other TSQLFile to have write access.
   For emergency cases one can use "BREAKLOCK" option in TSQLFile constructor to ignore that locking.
   This is not real locking and any other user with normal sql queries can disturb tables data, but I do not see
   now other solution, which may work for different databases. May be you know better solutions?


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