diff options
Diffstat (limited to 'src/pack.h')
| -rw-r--r-- | src/pack.h | 121 |
1 files changed, 88 insertions, 33 deletions
diff --git a/src/pack.h b/src/pack.h index a7112a6aa..610e70c18 100644 --- a/src/pack.h +++ b/src/pack.h @@ -1,37 +1,25 @@ /* - * This file is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License, version 2, - * as published by the Free Software Foundation. + * Copyright (C) the libgit2 contributors. All rights reserved. * - * In addition to the permissions in the GNU General Public License, - * the authors give you unlimited permission to link the compiled - * version of this file into combinations with other programs, - * and to distribute those combinations without any restriction - * coming from the use of this file. (The General Public License - * restrictions do apply in other respects; for example, they cover - * modification of the file, and distribution when not linked into - * a combined executable.) - * - * This file is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; see the file COPYING. If not, write to - * the Free Software Foundation, 51 Franklin Street, Fifth Floor, - * Boston, MA 02110-1301, USA. + * This file is part of libgit2, distributed under the GNU GPL v2 with + * a Linking Exception. For full terms see the included COPYING file. */ #ifndef INCLUDE_pack_h__ #define INCLUDE_pack_h__ +#include <zlib.h> + #include "git2/oid.h" #include "common.h" #include "map.h" #include "mwindow.h" #include "odb.h" +#include "oidmap.h" +#include "array.h" + +#define GIT_PACK_FILE_MODE 0444 #define PACK_SIGNATURE 0x5041434b /* "PACK" */ #define PACK_VERSION 2 @@ -56,7 +44,7 @@ struct git_pack_header { * Very old git binaries will also compare the first 4 bytes to the * next 4 bytes in the index and abort with a "non-monotonic index" * error if the second 4 byte word is smaller than the first 4 - * byte word. This would be true in the proposed future index + * byte word. This would be true in the proposed future index * format as idx_signature would be greater than idx_version. */ @@ -67,9 +55,41 @@ struct git_pack_idx_header { uint32_t idx_version; }; +typedef struct git_pack_cache_entry { + size_t last_usage; /* enough? */ + git_atomic refcount; + git_rawobj raw; +} git_pack_cache_entry; + +struct pack_chain_elem { + git_off_t base_key; + git_off_t offset; + size_t size; + git_otype type; +}; + +typedef git_array_t(struct pack_chain_elem) git_dependency_chain; + +#include "offmap.h" + +GIT__USE_OFFMAP; +GIT__USE_OIDMAP; + +#define GIT_PACK_CACHE_MEMORY_LIMIT 16 * 1024 * 1024 +#define GIT_PACK_CACHE_SIZE_LIMIT 1024 * 1024 /* don't bother caching anything over 1MB */ + +typedef struct { + size_t memory_used; + size_t memory_limit; + size_t use_ctr; + git_mutex lock; + git_offmap *entries; +} git_pack_cache; + struct git_pack_file { git_mwindow_file mwf; git_map index_map; + git_mutex lock; /* protect updates to mwf and index_map */ uint32_t num_objects; uint32_t num_bad_objects; @@ -77,38 +97,73 @@ struct git_pack_file { int index_version; git_time_t mtime; - unsigned pack_local:1, pack_keep:1; - git_oid sha1; + unsigned pack_local:1, pack_keep:1, has_cache:1; + git_oidmap *idx_cache; + git_oid **oids; + + git_pack_cache bases; /* delta base cache */ /* something like ".git/objects/pack/xxxxx.pack" */ char pack_name[GIT_FLEX_ARRAY]; /* more */ }; struct git_pack_entry { - off_t offset; + git_off_t offset; git_oid sha1; struct git_pack_file *p; }; +typedef struct git_packfile_stream { + git_off_t curpos; + int done; + z_stream zstream; + struct git_pack_file *p; + git_mwindow *mw; +} git_packfile_stream; + +size_t git_packfile__object_header(unsigned char *hdr, size_t size, git_otype type); + int git_packfile_unpack_header( size_t *size_p, git_otype *type_p, git_mwindow_file *mwf, git_mwindow **w_curs, - off_t *curpos); + git_off_t *curpos); -int git_packfile_unpack(git_rawobj *obj, struct git_pack_file *p, off_t *obj_offset); +int git_packfile_resolve_header( + size_t *size_p, + git_otype *type_p, + struct git_pack_file *p, + git_off_t offset); + +int git_packfile_unpack(git_rawobj *obj, struct git_pack_file *p, git_off_t *obj_offset); +int packfile_unpack_compressed( + git_rawobj *obj, + struct git_pack_file *p, + git_mwindow **w_curs, + git_off_t *curpos, + size_t size, + git_otype type); + +int git_packfile_stream_open(git_packfile_stream *obj, struct git_pack_file *p, git_off_t curpos); +ssize_t git_packfile_stream_read(git_packfile_stream *obj, void *buffer, size_t len); +void git_packfile_stream_free(git_packfile_stream *obj); -off_t get_delta_base(struct git_pack_file *p, git_mwindow **w_curs, - off_t *curpos, git_otype type, - off_t delta_obj_offset); +git_off_t get_delta_base(struct git_pack_file *p, git_mwindow **w_curs, + git_off_t *curpos, git_otype type, + git_off_t delta_obj_offset); + +void git_packfile_free(struct git_pack_file *p); +int git_packfile_alloc(struct git_pack_file **pack_out, const char *path); -void packfile_free(struct git_pack_file *p); -int git_packfile_check(struct git_pack_file **pack_out, const char *path); int git_pack_entry_find( struct git_pack_entry *e, struct git_pack_file *p, const git_oid *short_oid, - unsigned int len); + size_t len); +int git_pack_foreach_entry( + struct git_pack_file *p, + git_odb_foreach_cb cb, + void *data); #endif |