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adc0327a
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2010-10-29T00:44:15
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Add git_odb_read_header method to the ODB
As requested, git_odb_read_header looks up an object on the ODB, but loads
only the header information (type & size) without loading any of the
actual file contents in memory.
It is significantly faster than doing a git_odb_read if you only need an
object's information and not its contents.
Signed-off-by: Vicent Marti <tanoku@gmail.com>
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0c3596f1
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2010-09-20T01:57:53
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Add setter methods & write support for git_commit
All the required git_commit_set_XXX methods have been implemented; all
the attributes of a commit object can now be modified in-memory.
The new method git_object_write() automatically writes back the
in-memory changes of any object to the repository. So far it only
supports git_commit objects.
Signed-off-by: Vicent Marti <tanoku@gmail.com>
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f49a2e49
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2010-09-19T03:21:06
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Give object structures more descriptive names
The 'git_obj' structure is now called 'git_rawobj', since
it represents a raw object read from the ODB.
The 'git_repository_object' structure is now called 'git_object',
since it's the base object class for all objects.
Signed-off-by: Vicent Marti <tanoku@gmail.com>
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7e4f56a5
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2010-08-06T18:37:59
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Add packfile reading
Packed objects inside packfiles are now properly unpacked when calling
the git_odb__read_packed() method; delta'ed objects are also properly
generated when needed.
A new unit test 0204-readpack tries to read a couple hundred packed
objects from a standard packed repository.
Signed-off-by: Vicent Marti <tanoku@gmail.com>
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89217d8f
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2010-04-28T20:20:00
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Add functions to open a '*.pack' file and perform some basic validation
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
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3cc60635
|
2010-03-05T19:06:28
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Add some more (macro) file operation wrappers
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
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54b9460f
|
2010-04-07T20:13:56
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Fix the memory leak caused by failing to free the 'offset index'
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
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2cdc4544
|
2010-02-26T22:53:10
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Add a pack index 'virtual function' to fetch an index entry
Given an index entry number, the idx_get() function returns an
(version agnostic) index_entry structure containing all of the
information required to unpack the corresponding object from
the '.pack' file.
Since the v1 and v2 file formats differ in the layout of the
object records, we provide two implementations of the get
function and initialise the function pointer appropriately.
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
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608d33fa
|
2010-02-26T19:59:06
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Add a pack index 'virtual function' to search by file offset
In addition to searching the index by oid, we need to search by
'.pack' file offset, particularly when processing OBJ_OFS_DELTA
objects. Since the v1 and v2 file formats differ in the layout
of the object records, we provide two implementations of the
search function and initialise the (virtual) function pointer
appropriately.
Note that, as part of the creation of the 'offset index', we also
add a check that the offset data in the index is within the bounds
of the '.pack' file. Having sorted the file offsets, while creating
the index, we only need to check the smallest and largest values.
The offset index consists of the im_off_idx array, which contains
the index entry numbers sorted into file offset order, and the
im_off_next mapping array. The im_off_next array maps an index
entry number to the 'next' index entry in file offset order.
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
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abf5681c
|
2010-02-26T19:29:54
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Change the interface of the pack index search function
In particular, on a successful search, we now return the index
entry number of the object rather than the '.pack' file offset.
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
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238e54bc
|
2010-02-21T15:34:53
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Add an 64-bit offset table index bounds check for v2 pack index
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
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255a0dab
|
2010-02-19T22:36:31
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Add a minimum size check when opening an v2 pack index file
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
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1e5dd572
|
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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e8a95256
|
2010-01-04T18:57:13
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msvc: Fix some -W4 warnings
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
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1a7bae4d
|
2010-01-11T22:51:42
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|
Fix some "unused parameter" warnings with -Wextra
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
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0ef9d2aa
|
2010-01-03T22:56:54
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|
Fix some "signed v unsigned comparison" warnings with -Wextra
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
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a4f863af
|
2010-01-03T19:37:04
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|
Fix an always false comparison "unsigned < 0" warning
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
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8a086f87
|
2009-06-14T22:12:20
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win32: Add support for the MS Visual C/C++ compiler
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
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2bf93fa1
|
2009-06-14T22:10:23
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|
Correct the spelling of the FLEX_ARRAY macro
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>
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e17a3f56
|
2009-06-04T16:47:59
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|
Implement git_odb_write()
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Andreas Ericsson <ae@op5.se>
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ac04bdf6
|
2009-06-04T16:44:54
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|
Fix a usage error in a call to the object_file_name() function
In 82324ac, the new static function exists_loose() called
object_file_name() and, in order to detect an error return,
tested for a negative value. This usage is incorrect, as
the error return is indicated by a positive return value.
(A successful call is indicated by a zero return value)
The only error return from object_file_name() relates to
insufficient buffer space and the return value gives the
required minimum buffer size (which will always be >0).
If the caller requires a dynamically allocated buffer,
this allows something like the following call sequence:
size_t len = object_file_name(NULL, 0, db->object_dir, id);
char *buf = git__malloc(len);
if (!buf)
error(...);
object_file_name(buf, len, db->object_dir,id);
...
No current callers take advantage of this capability.
Fix up the call site and change the return type of the
function, from int to size_t, which more accurately
reflects the implementation.
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Andreas Ericsson <ae@op5.se>
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79ca2edc
|
2009-03-20T19:51:48
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|
win32: Add routines to abstract memory-mapped file functions
In particular, the git__mmap() and git__munmap() routines provide
the interface to platform specific memory-mapped file facilities.
We provide implementations for unix and win32, which can be found
in their own sub-directories.
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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840fb8b7
|
2009-02-18T18:53:48
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|
win32: fixup some headers to improve win32 compilation
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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|
a9984a4e
|
2009-02-18T18:52:13
|
|
Fix some (digital-mars) compiler warnings
In particular, conditional expressions which contain an
assignment statement, where the expression type is not
explicitly made to be boolean, elicits the following
message:
warning 2: possible unintended assignment
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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82324ac1
|
2009-02-10T21:49:48
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|
Add the git_odb_exists() object query function
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>
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e9f5e877
|
2009-02-03T18:25:13
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|
Rearrange some code to improve clarity
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>
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236e7579
|
2009-02-03T18:23:50
|
|
Check for error returns from inflateInit()
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>
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c94eb4aa
|
2009-02-03T18:22:09
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|
Fix a potential memory leak
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>
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|
bed3229b
|
2009-01-03T03:34:09
|
|
Precompute the fanout decoding and the oid offset in a pack-*.idx
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>
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a7c60cfc
|
2009-01-03T02:41:26
|
|
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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|
098ac57a
|
2009-01-03T00:02:25
|
|
Refactor pack memory management and locking to be safer
Using an atomic reference counter is difficult to make
cross-platform, as the reference count implementations
are generally processor specific. Its also hard to do
a proper multi-read/single-write implementation.
We now use a simple mutex around the reference count for the list
of packs. Readers grab the mutex and either build the list, or
increment the existing one's reference count. When the reader is
done with the list, the reference count is decremented. In this way
parallel readers are able to operate on the list without worrying
about it being deallocated out from under them.
Individual pack structures are held by reference counts, but we
only care about the list the pack structure is held in. There is
no need to increment/decrement the pack reference counts as we
scan through them during a read operation, the caller holds the
git_packlist and that is sufficient to hold the packs it references.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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3a33c7b3
|
2009-01-02T20:51:47
|
|
Fix snprintf compiler warning on cygwin
As far as gcc is concerned, the "z size specifier" is available as
an extension to the language, which is available with or without any
-std= switch. (I think you have to go back to 2.95 for a version
of gcc which doesn't work.) Many other compilers have this as an
extension as well (ie without the equivalent of -std=c99).
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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|
b438016e
|
2008-12-31T16:20:05
|
|
Find pack files in $GIT_DIR/objects/pack directory on git_odb_open
Currently we only catalog the available pack files into a table,
storing their path names relative to the pack directory.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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|
5614dc18
|
2008-12-31T13:27:51
|
|
Add basic locking to the git_odb structure
We grab the lock while accessing the alternates list, ensuring that
we only initialize it once for the given git_odb.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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|
d44cfd46
|
2008-12-31T13:16:31
|
|
Cleanup our header inclusion order to ensure pthread.h is early
If we are using threads we need to make sure pthread.h comes
in before just about anything else. Some platforms enable
macros that alter what other headers define.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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|
64a47c01
|
2008-12-30T23:21:36
|
|
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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|
|
ffb55c53
|
2008-12-30T22:29:04
|
|
Rename the path of the objects directory to be more specific
We're likely to add additional path data, like the path of the
refs or the path to the config file into the git_odb structure,
as it may grow into the repository wrapper. Changing the name
of the objects directory reference makes it more clear should
we later add something else.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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|
|
4c67e2e9
|
2008-12-30T22:25:30
|
|
Change git_odb__read_packed to return ENOTFOUND until implemented
We didn't search for the object, so we cannot possibly promise it
to the caller of git_odb_read().
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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|
|
064301cc
|
2008-12-30T22:07:56
|
|
Fix size_t snprintf warning by using PRIuPTR format macro
This is the correct C99 format code for the size_t type when passed
as an argument to the *printf family. If the platform doesn't
define it, we assume %lu and just cross our fingers that its the
proper setting for a size_t on this system. On most sane platforms,
"unsigned long" is the underlying type of "size_t".
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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|
|
c960d6a3
|
2008-12-27T18:59:43
|
|
Add a routine to determine a git_oid given an git_obj
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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|
|
3d3552e8
|
2008-12-18T22:58:10
|
|
Implement git_odb__read_loose()
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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|
7b6e8067
|
2008-12-10T18:31:28
|
|
Add some git_otype string conversion and testing routines
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
|
|
dff79e27
|
2008-11-18T00:59:36
|
|
Rename "git_sobj" "git_obj"
The 's' never really made sense, since it's not a "small"
object at all, but rather a plain object. As such, it should
have a "plain" object name.
Signed-off-by: Andreas Ericsson <ae@op5.se>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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|
1699efc4
|
2008-11-03T18:39:37
|
|
Implement some of the basic git_odb open and close API
Far from being complete, but its a good start.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
|
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|
50298f44
|
2008-11-01T15:55:01
|
|
Switch the license from BSD to GPL+libgcc exception
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
|
|
|
d1ea30c3
|
2008-11-01T15:42:23
|
|
Move include files to include/git/, drop git_ prefix from file names
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
|