as the current version of zlib.


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or the compressed buffer larger than the original buffer.
This case may happen in case of small buffers containing random data.


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ROOT will automatically detect the old or new mode. The code to support
both modes was introduced 3 years ago.
The new ZIP algorithm gives slightly better compression and is also
slightly faster.


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Makefile.config updated.


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I saw that you had added the class TVirtualFFT, so I changed the package
from libroot-fftw to root-plugin-fftw3.

Finally, I made some corrections to some of the Debian packaging.


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dynamically the new zlib as an alternative to the current zip functions.


To activate the new zlib it is enough to set Root.ZipMode = 1
in the system.rootrc file.
When setting Root.ZipMode to 1 (or 0) it is possible to read files
written with the old zip function.
Files written with Root.ZipMode=1 can only be read by versions
of Root >= 4.02/00.

A new function R__SetZipMode has been added in zip/Bits.h.
This function is called by TROOT::InitSystem with the value specified
in system.rootrc.

Some performance tests (on a P4 2.4GHz) show that
the new zlib version is as fast as the current ROOT zip functions when
writing and up to 10 per cent faster when reading.
                          oldzlib            newzlib
Event 1000 1 0   1         11.59s             11.46s
Event 1000 1 0  20          3.83s              3.31s
Event 1000 1 99  1         10.44s             10.98s
Event 1000 1 99 20          3.57s              3.17s
stress -b 30               13.01s             12.35s
stress -b 1000             61.67s             58.38s
bench                     151.99s            151.56s
stressLinear               35.87s             35.77s


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with other packages also using gzip (geant4 or ROOT freetype)


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Without this protection the program crashes. With the protection,
the error is recovered by TBasket::ReadBasketBuffers.


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to avoid a clash on Windows with deflate.h and deflate.c respectively


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The zlib package has been added to the zip directory.
see new README file in the zip directory for more details.
R__zip and R__unzip now have a zlib version which can be
  activated via the flag R__ZLIB in the files zip/src/Inflate.c and
  zip/inc/Bits.h
The current version is introduced to test the portability of the new files.
We will add a dedicated namespace to avoid possible conflicts with users of zlib.


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Checked with gcc 3.4 from cvs of today which does not report any
problems anymore.


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Extract from a mail from Michal:

"I'm a summer student working for the openlab project (supervisor: Sverre
Jarp). I've been optimizing ROOT on an Itanium platform for a few weeks
and I've found a bug, which, if it's accepted and corrected, will
influence all the ROOT benchmarks that have been done by now.

What I've found is that all zip/*.c files use the variable 'level' which
is declared in ZIP.h as a static (local) variable. The result is that
calling R__zip(1, ...) (as in the 'stress' program) changes the 'level'
variable only in the Bits.c file, but its value remains default ( == 6) in
the others. The resulting compressed file is still correct, but the
drawback is quite huge slow-down of the programs like 'stress' which use
data compression intensively.

Some facts: by putting the files: Tree.c, Bits.c and Deflate.c in a single
C file (with some small changes), what makes the 'level' variable appear
in only one copy, I've increased the result of the 'stress' benchmarking
program from 584 RM to 701 RM -- 20% improvement. At the same time, the
size of all compressed data increased by about 1.7%. (Itanium 1000 MHz
machine, Intel compiler v8.0 with -O3 and profile-guided optimization).

The bug is really easy to fix, but it will require all the benchmarks done
in the past to be repeated or rescaled..."


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compiler is by default in pedantic mode (LHCb also like to use this option).
The following issues have been fixed:
- removal of unused arguments
- comparison between signed and unsigned integers
- not calling of base class copy ctor in copy ctor's
To be done, the TGeo classes where we get still many hundred warnings of
the above nature. List forwarded to Andrei.


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the pointer position in the uncompressed buffer with the value initially
expected. There are some rare cases when the Inflate function requires
a few more bytes.


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resulting in a gain of about 20 per cent in read time.


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which included commits to RCS files with non-trunk default branches.


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