Log of /trunk/hist/hbook/inc/THbookFile.h
Parent Directory
Revision
7810 -
(
view)
(
download)
(
as text)
(
annotate)
-
[select for diffs]
Modified
Tue Dec 30 13:16:51 2003 UTC (11 years ago) by
brun
Original Path:
trunk/hbook/inc/THbookFile.h
File length: 3196 byte(s)
Diff to
previous 5459
Mega patch to add support for large files (bigger than 2 GBytes)
----------------------------------------------------------------
==========>NEW VERSION 4.00/00 <===========
Because this new version has a considerable number of changes,
and new important additions by Philippe are scheduled for the coming days
we are starting a new major version 4.
-Support for large files
-Automatic schema evolution for foreign classes
-New data type Double32_t
Large files are currently tested only under Linux with gcc3.2.
Support for other systems will be gradually added in the coming days.
By default under Linux, files are created with the option LARGEFILE.
Note that when creating a Tree, the default maximum size for a Tree
is set to 1.9 GBytes. You can change this default value by calling
TTree::SetMaxTreeSize(Long64_t maxsize)
The implementation of this new feature has required changes in many places.
The files produced by this new version can still be read by old ROOT versions
if their size if smaller than 2 GBytes. And obviously, the new version
can digest old ROOT files.
WARNING: note the following backward incompatibility:
-TSystem::GetPathInfo has a new signature: (also TUnixSystem, TWinNTSystem, etc)
old: GetPathInfo(const char *path, Long_t *id, Long_t *size, Long_t *flags, Long_t *modtime);
new: GetPathInfo(const char *path, Long_t *id, Long64_t *size, Long_t *flags, Long_t *modtime);
-TFile::SysSeek and TFile::SysStat have a new signature (also TNetFile, TWebFile, etc)
old: Int_t SysSeek(Int_t fd, Long_t offset, Int_t whence);
Int_t SysStat(Int_t fd, Long_t *id, Long_t *size, Long_t *flags, Long_t *modtime);
new: Long64_t SysSeek(Int_t fd, Long64_t offset, Int_t whence);
Int_t SysStat(Int_t fd, Long_t *id, Long64_t *size, Long_t *flags, Long_t *modtime);
-TTree::SetMaxTreeSize has a new signature:
old: void TTree::SetMaxTreeSize(Int_t maxsize)
new: void TTree::SetMaxTreeSize(Long64_t maxsize)
All references to Seek_t have been replaced by Long64_t.
Revision
5459 -
(
view)
(
download)
(
as text)
(
annotate)
-
[select for diffs]
Modified
Tue Oct 22 12:10:01 2002 UTC (12 years, 3 months ago) by
brun
Original Path:
trunk/hbook/inc/THbookFile.h
File length: 3196 byte(s)
Diff to
previous 4416
Implement new function IsOpen (like in TFile).
Set the Zombie bit on if the file cannot be open.
There are now two ways to detect if a file is open:
TFile f("myfile.hbook");
if (f.IsOpen()); //if true f has been open successfully
if (f.IsZombie()); //if true f cannot be used
Revision
4041 -
(
view)
(
download)
(
as text)
(
annotate)
-
[select for diffs]
Modified
Wed Feb 20 16:57:31 2002 UTC (12 years, 11 months ago) by
brun
Original Path:
trunk/hbook/inc/THbookFile.h
File length: 3014 byte(s)
Diff to
previous 4029
First operational version of the Hbook interface classes.
With this new version, one can:
- import automatically any 1-d, 2-d or profile histograms. The Hbook types
are converted on the fly to Root types TH1F, TH2F and TProfile.
- import ntuple headers (Row or Column-Wise).
A new data type THbookTree (deriving from TTree) with functions like
hbookTree.Draw("x","selection") like for a normal TTree. The ntuple data
are read directly from the Hbook file.
- The Tree viewer can be used directly: hbookTree.StartViewer();
- Browse the THbookFile via TBrowser. Clicking on a Hbook ID in a file
draws the histogram.
- When in the browser, the context menu item "Convert2root" can be selected
to convert a THbookFile into a normal TFile (via h2root). The converted file
is by default connected to the browser.
This form allows you to request diffs between any two revisions of this file.
For each of the two "sides" of the diff,
enter a numeric revision.
