Commit Graph

6 Commits

Author SHA1 Message Date
Eric Andersen
1acfb72e71 Manuel Novoa III writes:
Hello Rob,

Here's a patch to your bunzip-3.c file.  Nice work btw.

One minor bug fix... checking for error return when read()ing.
Some size/performance optimizations as well.  One instance of
memset() seems unnecssary.  You might want to take a look.

Anyway, on my machine, decompressing linux-2.6.0-test7.tar.bz2
to /dev/null gave the following times:

        bunzip-3.c    bzcat (system)   bunzip-3.c (patched)
real    0m24.420s     0m22.725s        0m20.701s
user    0m23.930s     0m22.170s        0m20.180s
sys     0m0.070s      0m0.080s         0m0.140s

Size of the patched version is comparable (slightly larger or
smaller depending on compiler flags).

Manuel
2003-10-18 01:59:46 +00:00
Eric Andersen
0d6d88a205 Rob Landley's new micro-bunzip version 3. Rob writes:
The API for using partial writes, as described in my last message, sucked.

So here's a patch against my last patch that changes things so that
write_bunzip_data calls read_bunzip_data itself behind the scenes whenever
necessary.  So usage is now just start_bunzip(), write_bunzip_data() until it
returns a negative number, and then the cleanup at the end of
uncompressStream.

It adds 32 bytes to the executable, but it should allow the caller (tar) to be
simplified enough to compensate.  Total -Os stripped exe size now 6856 bytes.

Rob

P.S.  I attached the whole C file so you don't have to keep incremental
patches straight if you don't want to. :)

P.S.  In the version I'm banging on now, I've simplified the license to just
LGPL.  I read the OSL a bit more closely and the patent termination clause
would have bit IBM in their counter-suit of SCO if the code in question had
been OSL instead of GPL, and I've decided I just don't want to beta-test
legal code right now.
2003-10-18 01:58:35 +00:00
Manuel Novoa III
cad5364599 Major coreutils update. 2003-03-19 09:13:01 +00:00
Glenn L McGrath
7f2a95319b Fail silently if a partial tar header is read as tar.bz2 is leaving trailing junk (not sure why), add some missing files 2002-11-05 02:56:57 +00:00
Glenn L McGrath
237ae42fc9 Abstract read and seek in unarchiving code, convert bunzip to file descriptors, support tar -j 2002-11-03 14:05:15 +00:00
Glenn L McGrath
60bce4905c Move bunzip2 idecompression code to libunarchive 2002-11-03 07:28:38 +00:00