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  1. Mar 27, 2012
  3. Mar 07, 2012
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  11. Nov 12, 2011
  13. Nov 01, 2011
  15. Oct 11, 2011
  17. Oct 06, 2011
    • Philippe Canal's avatar
      Fix Coverity issues: · 6eea14e8
      Philippe Canal authored 
      TBranchSTL: cov 34339 Resource leak (false positive)
TTableDescriptor.cxx: cov 34219,34220 explicit null dereference
TSQLStructure.cxx: cov 34204,34205,34206 Explicit null dereferenced 
TTabCom.cxx: cov 34168 Explicit null dereferenced 
TClassRef.cxx: cove 34165 Explicit null dereferenced (false positive but still confusing coding).
TBufferXML.cxx: 34070 Explicit null dereferenced
TFriendProxyDescriptor.cxx: cov 34066 Uninitialized scalar field
TTreeCloner.cxx: cov 34034057 Dereference null return (stat) 63 Uninitialized scalar field 
TParallelCoordEditor.cxx: 34051,34059,34060,34061 Dereference null return value
TParallelCoord.cxx: 34050,34056, 34057 Dereference null return (stat) 
TBranchProxy.h: 34048 Dereference null return value 
TBranchProxy.cxx: 34043,34044,34045 Dereference null return value
TTree.cxx: 34039 Dereference null return value
TTreePlayer.cxx: 34037 Dereference null return value 
TLeafC.cxx: 34036 Dereference null return value


git-svn-id: http://root.cern.ch/svn/root/trunk@41244 27541ba8-7e3a-0410-8455-c3a389f83636
      6eea14e8
  19. Oct 01, 2011
  21. Sep 08, 2011
  23. Jun 28, 2011
  25. Jun 13, 2011
    • Philippe Canal's avatar
      From David Dagenhart: · 02d8d542
      Philippe Canal authored 
      Implement an option to allow ROOT to use the LZMA compression
algorithm to compress data instead of the ZLIB compression algorithm.
LZMA compression typically results in smaller files, but takes more
CPU time to compress data. To use the new feature, the external XZ
package must be installed when ROOT is configured and built:

Download 5.0.3 from here http://tukaani.org/xz/
and make sure to configure with fPIC:
   ./configure CFLAGS='-fPIC'

Then the client C++ code must call routines to explicitly request LZMA
compression.

ZLIB compression is still the default.

Setting the Compression Level and Algorithm:

There are three equivalent ways to set the compression level and 
algorithm. For example, to set the compression to the LZMA algorithm
and compression level 5.

1. TFile f(filename, option, title);
   f.SetCompressionSettings(ROOT::CompressionSettings(ROOT::kLZMA, 5));

OR

2. TFile f(filename, option, title, ROOT::CompressionSettings(ROOT::kLZMA, 5));

OR

3. TFile f(filename, option, title);
   f.SetCompressionAlgorithm(ROOT::kLZMA);
   f.SetCompressionLevel(5);

These methods work for TFile, TBranch, TMessage, TSocket, and TBufferXML. 
The compression algorithm and level settings only affect compression of
data after they have been set. TFile passes its settings to its branches 
only at the time the branches are created. This can be overidden by 
explicitly setting the level and algorithm for the branch. These classes 
also have the following methods to access the algorithm and level for 
compression.

   Int_t GetCompressionAlgorithm() const;
   Int_t GetCompressionLevel() const;
   Int_t GetCompressionSettings() const;

If the compression level is set to 0, then no compression will be
done. All of the currently supported algorithms allow the level to be
set to any value from 1 to 9. The higher the level, the larger the
compression factors will be (smaller compressed data size). The
tradeoff is that for higher levels more CPU time is used for
compression and possibly more memory. The ZLIB algorithm takes less
CPU time during compression than the LZMA algorithm, but the LZMA
algorithm usually delivers higher compression factors.

The header file core/zip/inc/Compression.h declares the function
"CompressionSettings" and the enumeration for the algorithms.
Currently the following selections can be made for the algorithm:
kZLIB (1), kLZMA (2), kOldCompressionAlgo (3), and kUseGlobalSetting
(0). The last option refers to an older interface used to control the
algorithm that is maintained for backward compatibility. The following
function is defined in core/zip/inc/Bits.h and it set the global
variable.

   R__SetZipMode(int algorithm)

If the algorithm is set to kUseGlobalSetting (0), the global variable
controls the algorithm for compression operations.  This is the
default and the default value for the global variable is kZLIB.

Note that the LZMA algorithm will only be available if the LZMA
libraries from the XZ package were available when the ROOT executable
being used was configured and built. If you are building ROOT and want
LZMA then you must do something similar to the following if XZ is not
already installed on your system.

  Download XZ version 5.0.3 from http://tukaani.org/xz/
  unwind the tarball
  cd xz-5.0.3
  ./configure CFLAGS='-fPIC'
  make

ROOT was tested with version 5.0.3 of XZ.  It might work with earlier
versions and will probably work with later versions of XZ.

Then either use "make install" to put the library and headers into
/usr/local/* so the scripts building ROOT can find them or use
arguments to the ROOT configure script to point to the proper
directories containing the XZ library and headers. These are the
library and the included header (lzma.h includes other headers in the
lzma subdirectory).

  src/liblzma/.libs/liblzma.a
  src/liblzma/api/lzma.h

WARNING: Data compressed with the LZMA algorithm cannot be read by
ROOT executables that were not built with LZMA support.


git-svn-id: http://root.cern.ch/svn/root/trunk@39696 27541ba8-7e3a-0410-8455-c3a389f83636
      02d8d542
  27. Jun 07, 2011
    • Fons Rademakers's avatar
      From Pere: · 321bd727
      Fons Rademakers authored 
      - Added the following packages: oracle, mysql, odbc, gviz, fftw, pythia6,
  pythia8, unuran, table
- Changed the default values for the build options depending on platform
  such that they display correctly with cmake-gui or ccmake
- Fixed mathmore build on Windows
- Make histfactory depending on xml option


git-svn-id: http://root.cern.ch/svn/root/trunk@39577 27541ba8-7e3a-0410-8455-c3a389f83636
      321bd727
  29. Mar 31, 2011
  31. Nov 15, 2010
  33. Oct 13, 2010
  35. Oct 12, 2010
  37. Oct 11, 2010
  39. Oct 10, 2010
  41. Oct 09, 2010
  43. Oct 01, 2010
  45. Sep 30, 2010