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  1. 15 Jun, 2009 1 commit
    • Correct the spelling of the FLEX_ARRAY macro · 2bf93fa1 
      When setting the default value, the macro name was specified
as GIT_FLEX_ARRAY, which is inconsistent with it's earlier
usage in the file. This caused a compilation error, using the
MS Visual C/C++ compiler, when compiling the git_packlist
struct definition in src/odb.c.

In addition to changing the spelling of the FLEX_ARRAY macro
to GIT_FLEX_ARRAY, including it's use in src/odb.c, we also
rename the TYPEOF macro to GIT_TYPEOF.

Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
      Ramsay Jones committed
  3. 05 Jun, 2009 11 commits
  5. 30 Mar, 2009 3 commits
  7. 20 Mar, 2009 2 commits
  9. 18 Mar, 2009 7 commits
  11. 11 Feb, 2009 5 commits
    • Correct some comments in readloose tests · 04c9c16e 
      Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
      Ramsay Jones committed
    • Add the git_odb_exists() object query function · 82324ac1 
      This function determines if the given object can be found
in the object database. At present, only the local object
database is searched.

Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
      Ramsay Jones committed
    • Rearrange some code to improve clarity · e9f5e877 
      In particular, the test for z-stream input completion
(zs.avail_in != 0) logically belongs with the test for
the Z_STREAM_END stream status. This is also consistent
with the identical check in finish_inflate().

Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
      Ramsay Jones committed
    • Check for error returns from inflateInit() · 236e7579 
      At present, it is sufficient to ensure that an error return
from inflateInit() is not ignored. Most error returns, like
Z_VERSION_ERROR and Z_STREAM_ERROR, indicate programming or
build errors. These errors could, perhaps, be handled with
simple asserts. However, for a Z_MEM_ERROR, we may want to
perform some further error handling in the future.

Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
      Ramsay Jones committed
    • Fix a potential memory leak · c94eb4aa 
      In particular, neglecting to call inflateEnd() along various
codepaths in the inflate_tail() routine, would result in the
failure to release zlib internal state.

Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
      Ramsay Jones committed
  13. 01 Feb, 2009 4 commits
  15. 28 Jan, 2009 4 commits
  17. 03 Jan, 2009 3 commits
    • Add the binary delta apply algorithm for pack style deltas · c23841c8 
      The git__delta_apply() function can be used to apply a Git style
delta, such as those used in pack files or in git patch files,
to recover the original object stream.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
      Shawn O. Pearce committed
    • Precompute the fanout decoding and the oid offset in a pack-*.idx · bed3229b 
      The fanout table is fairly commonly accessed, we need to read it
twice for each object we lookup in any given pack file.  Most of
the processors running Git are running in little-endian mode, as
they are variants of the x86 platform, so reading the fanout is
a costly operation as we need to convert from network byte order
to local byte order.  By decoding the fanout table into a malloc
obtained buffer we can save these 2 decode operations per lookup
and make search go more quickly.

This also cleans up the initialization of the search functions
by cutting out a few instructions, saving a small amount of time.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
      Shawn O. Pearce committed
    • Add basic support to read pack-*.idx v1 and v2 files · a7c60cfc 
      The index data is mapped into memory and then scanned using a
binary search algorithm to locate the matching entry for the
supplied git_oid.  The standard fanout hash trick is applied to
reduce the search space by 8 iterations.

Since the v1 and v2 file formats differ in their search function,
due to the different layouts used for the object records, we use
two different search implementations and a virtual function pointer
to jump to the correct version of code for the current pack index.
The single function jump per-pack should be faster then computing
a branch point inside the inner loop of a common binary search.

To improve concurrency during read operations the pack lock is only
held while verifying the index is actually open, or while opening
the index for the first time.  This permits multiple concurrent
readers to scan through the same index.

If an invalid index file is opened we close it and mark the
git_pack's invalid bit to true.  The git_pack structure is kept
around in its parent git_packlist, but the invalid bit will cause
all future readers to skip over the pack entirely.  Pruning the
invalid entries is relatively unimportant because they shouldn't
be very common, a $GIT_DIRECTORY/objects/pack directory tends to
only have valid pack files.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
      Shawn O. Pearce committed