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e0646b38
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2010-12-30T00:31:58
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Add generic hash function to util.c
It's MurmurHash3 slightly edited to make it
cross-platform. Fast and neat.
Use this for hashing strings on hash tables instead
of a full SHA1 hash. It's very fast and well distributed.
Obviously not crypto-secure.
Signed-off-by: Vicent Marti <tanoku@gmail.com>
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e035685f
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2010-12-23T00:44:41
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Revert "Properly export all external symbols in Win32"
It is not a good idea to export these internal symbols now that they are
not required to run the unit tests.
Signed-off-by: Vicent Marti <tanoku@gmail.com>
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9f54fe48
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2010-12-23T00:15:09
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Remove git_errno
It was not being used by any methods (only by malloc and calloc), and
since it needs to be TLS, it cannot be exported on DLLs on Windows.
Burn it with fire. The API always returns error codes!
Signed-off-by: Vicent Marti <tanoku@gmail.com>
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2a18a792
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2010-12-22T22:43:39
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Properly export all external symbols in Win32
Some external functions were not being exported because they were using
the 'extern' keyword instead of the generic GIT_EXTERN() macro.
Signed-off-by: Vicent Marti <tanoku@gmail.com>
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0e465f97
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2010-08-12T18:47:32
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Add auxiliary method git__hexdump
New function in util.c to do a dump of a buffer's contents in
hexadecimal to stdout.
Signed-off-by: Vicent Marti <tanoku@gmail.com>
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3cd8b687
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2010-07-10T12:08:04
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Fix warning in util.h (signed vs unsigned comparison)
This fix had been delayed by Ramsay because on 32-bit systems it
highlights the fact that off_t is set to an invalid value.
Signed-off-by: Vicent Marti <tanoku@gmail.com>
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1e5dd572
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2010-02-12T16:50:33
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Fix some coding style issues
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
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ced645ea
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2009-01-12T19:42:13
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Add git__dirname and git__basename utility routines
These routines are intended to extract the directory and
base name from a path string. Note that these routines
do not interact with any filesystem and work only on the
text of the path.
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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a7c60cfc
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2009-01-03T02:41:26
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Add basic support to read pack-*.idx v1 and v2 files
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>
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2c4b7707
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2008-12-31T16:06:48
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Add git__fmt as an easier to use snprintf
Checking the return value of snprintf is a pain, as it must be
>= 0 and < sizeof(buffer). git__fmt is a simple wrapper to
perform these checks.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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9eb79764
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2008-12-31T14:35:39
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Add string utility functions for prefix and suffix compares
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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5673434f
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2008-12-31T07:34:43
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Undefine malloc,strdup,calloc before redefining them
Some systems may use cpp macros to define these functions, glibc
appears to be one of them.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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64a47c01
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2008-12-30T23:21:36
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Wrap malloc and friends and report out of memory as GIT_ENOMEM
We now forbid direct use of malloc, strdup or calloc within the
library and instead use wrapper functions git__malloc, etc. to
invoke the underlying library malloc and set git_errno to a no
memory error code if the allocation fails.
In the future once we have pack objects in memory we are likely
to enhance these routines with garbage collection logic to purge
cached pack data when allocations fail. Because the size of the
function will grow somewhat large, we don't want to mark them for
inline as gcc tends to aggressively inline, creating larger than
expected executables.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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3a2aabdc
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2008-11-22T14:44:47
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Add util.h - utility macros
ARRAY_SIZE() et al go in util.h, included from common.h
Signed-off-by: Andreas Ericsson <ae@op5.se>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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