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git/blob.c

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[PATCH] Implementations of parsing functions This implements the parsing functions. Signed-Off-By: Daniel Barkalow <barkalow@iabervon.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-18 22:39:48 +04:00
#include "cache.h"
[PATCH] Compilation: zero-length array declaration. ISO C99 (and GCC 3.x or later) lets you write a flexible array at the end of a structure, like this: struct frotz { int xyzzy; char nitfol[]; /* more */ }; GCC 2.95 and 2.96 let you to do this with "char nitfol[0]"; unfortunately this is not allowed by ISO C90. This declares such construct like this: struct frotz { int xyzzy; char nitfol[FLEX_ARRAY]; /* more */ }; and git-compat-util.h defines FLEX_ARRAY to 0 for gcc 2.95 and empty for others. If you are using a C90 C compiler, you should be able to override this with CFLAGS=-DFLEX_ARRAY=1 from the command line of "make". Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-01-07 12:33:54 +03:00
#include "blob.h"
object: add repository argument to create_object Add a repository argument to allow the callers of create_object to be more specific about which repository to act on. This is a small mechanical change; it doesn't change the implementation to handle repositories other than the_repository yet. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-08 22:37:25 +03:00
#include "repository.h"
alloc: allow arbitrary repositories for alloc functions We have to convert all of the alloc functions at once, because alloc_report uses a funky macro for reporting. It is better for the sake of mechanical conversion to convert multiple functions at once rather than changing the structure of the reporting function. We record all memory allocation in alloc.c, and free them in clear_alloc_state, which is called for all repositories except the_repository. Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-16 00:48:42 +03:00
#include "alloc.h"
[PATCH] Implementations of parsing functions This implements the parsing functions. Signed-Off-By: Daniel Barkalow <barkalow@iabervon.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-18 22:39:48 +04:00
const char *blob_type = "blob";
blob: allow lookup_blob to handle arbitrary repositories Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-29 04:22:08 +03:00
struct blob *lookup_blob(struct repository *r, const struct object_id *oid)
[PATCH] Implementations of parsing functions This implements the parsing functions. Signed-Off-By: Daniel Barkalow <barkalow@iabervon.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-18 22:39:48 +04:00
{
object: convert lookup_object() to use object_id There are no callers left of lookup_object() that aren't just passing us the "hash" member of a "struct object_id". Let's take the whole struct, which gets us closer to removing all raw sha1 variables. It also matches the existing conversions of lookup_blob(), etc. The conversions of callers were done by hand, but they're all mechanical one-liners. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-06-20 10:41:14 +03:00
struct object *obj = lookup_object(r, oid);
Clean up object creation to use more common code This replaces the fairly odd "created_object()" function that did _most_ of the object setup with a more complete "create_object()" function that also has a more natural calling convention. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-04-17 09:11:43 +04:00
if (!obj)
object: convert create_object() to use object_id There are no callers left of create_object() that aren't just passing us the "hash" member of a "struct object_id". Let's take the whole struct, which gets us closer to removing all raw sha1 variables. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-06-20 10:41:21 +03:00
return create_object(r, oid, alloc_blob_node(r));
object: drop parsed_object_pool->commit_count 14ba97f8 (alloc: allow arbitrary repositories for alloc functions, 2018-05-15) introduced parsed_object_pool->commit_count to keep count of commits per repository and was used to assign commit->index. However, commit-slab code requires commit->index values to be unique and a global count would be correct, rather than a per-repo count. Let's introduce a static counter variable, `parsed_commits_count` to keep track of parsed commits so far. As commit_count has no use anymore, let's also drop it from the struct. Signed-off-by: Abhishek Kumar <abhishekkumar8222@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-17 12:14:08 +03:00
return object_as_type(obj, OBJ_BLOB, 0);
[PATCH] Implementations of parsing functions This implements the parsing functions. Signed-Off-By: Daniel Barkalow <barkalow@iabervon.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-18 22:39:48 +04:00
}
[PATCH] Mark blobs as parsed when they're actually parsed This eliminates the special case for blobs versus other types of objects. Now the scheme is entirely regular and I won't introduce stupid bugs. (And fsck-cache doesn't have to do the do-nothing parse) Signed-Off-By: Daniel Barkalow <barkalow@iabervon.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-28 18:46:33 +04:00
blob: drop unused parts of parse_blob_buffer() Our parse_blob_buffer() takes a ptr/len combo, just like parse_tree_buffer(), etc, and returns success or failure. But it doesn't actually do anything with them; we just set the "parsed" flag in the object and return success, without even looking at the contents. There could be some value to keeping these unused parameters: - it's consistent with the parse functions for other object types. But we already lost that consistency in 837d395a5c (Replace parse_blob() with an explanatory comment, 2010-01-18). - As the comment from 837d395a5c explains, callers are supposed to make sure they have the object content available. So in theory asking for these parameters could serve as a signal. But there are only two callers, and one of them always passes NULL (after doing a streaming check of the object hash). This shows that there aren't likely to be a lot of callers (since everyone either uses the type-generic parse functions, or handles blobs individually), and that they need to take special care anyway (because we usually want to avoid loading whole blobs in memory if we can avoid it). So let's just drop these unused parameters, and likewise the useless return value. While we're touching the header file, let's move the declaration of parse_blob_buffer() right below that explanatory comment, where it's more likely to be seen by people looking for the function. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-12-13 14:11:57 +03:00
void parse_blob_buffer(struct blob *item)
[PATCH] don't load and decompress objects twice with parse_object() It turns out that parse_object() is loading and decompressing given object to free it just before calling the specific object parsing function which does mmap and decompress the same object again. This patch introduces the ability to parse specific objects directly from a memory buffer. Without this patch, running git-fsck-cache on the kernel repositorytake: real 0m13.006s user 0m11.421s sys 0m1.218s With this patch applied: real 0m8.060s user 0m7.071s sys 0m0.710s The performance increase is significant, and this is kind of a prerequisite for sane delta object support with fsck. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-06 21:48:34 +04:00
{
item->object.parsed = 1;
}