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Diffstat (limited to 'src/commit_graph.h')
| -rw-r--r-- | src/commit_graph.h | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/src/commit_graph.h b/src/commit_graph.h deleted file mode 100644 index 9d0a827de..000000000 --- a/src/commit_graph.h +++ /dev/null @@ -1,162 +0,0 @@ -/* - * Copyright (C) the libgit2 contributors. All rights reserved. - * - * 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_commit_graph_h__ -#define INCLUDE_commit_graph_h__ - -#include "common.h" - -#include "git2/types.h" -#include "git2/sys/commit_graph.h" - -#include "map.h" -#include "vector.h" - -/** - * A commit-graph file. - * - * This file contains metadata about commits, particularly the generation - * number for each one. This can help speed up graph operations without - * requiring a full graph traversal. - * - * Support for this feature was added in git 2.19. - */ -typedef struct git_commit_graph_file { - git_map graph_map; - - /* The OID Fanout table. */ - const uint32_t *oid_fanout; - /* The total number of commits in the graph. */ - uint32_t num_commits; - - /* The OID Lookup table. */ - git_oid *oid_lookup; - - /* - * The Commit Data table. Each entry contains the OID of the commit followed - * by two 8-byte fields in network byte order: - * - The indices of the first two parents (32 bits each). - * - The generation number (first 30 bits) and commit time in seconds since - * UNIX epoch (34 bits). - */ - const unsigned char *commit_data; - - /* - * The Extra Edge List table. Each 4-byte entry is a network byte order index - * of one of the i-th (i > 0) parents of commits in the `commit_data` table, - * when the commit has more than 2 parents. - */ - const unsigned char *extra_edge_list; - /* The number of entries in the Extra Edge List table. Each entry is 4 bytes wide. */ - size_t num_extra_edge_list; - - /* The trailer of the file. Contains the SHA1-checksum of the whole file. */ - git_oid checksum; -} git_commit_graph_file; - -/** - * An entry in the commit-graph file. Provides a subset of the information that - * can be obtained from the commit header. - */ -typedef struct git_commit_graph_entry { - /* The generation number of the commit within the graph */ - size_t generation; - - /* Time in seconds from UNIX epoch. */ - git_time_t commit_time; - - /* The number of parents of the commit. */ - size_t parent_count; - - /* - * The indices of the parent commits within the Commit Data table. The value - * of `GIT_COMMIT_GRAPH_MISSING_PARENT` indicates that no parent is in that - * position. - */ - size_t parent_indices[2]; - - /* The index within the Extra Edge List of any parent after the first two. */ - size_t extra_parents_index; - - /* The SHA-1 hash of the root tree of the commit. */ - git_oid tree_oid; - - /* The SHA-1 hash of the requested commit. */ - git_oid sha1; -} git_commit_graph_entry; - -/* A wrapper for git_commit_graph_file to enable lazy loading in the ODB. */ -struct git_commit_graph { - /* The path to the commit-graph file. Something like ".git/objects/info/commit-graph". */ - git_buf filename; - - /* The underlying commit-graph file. */ - git_commit_graph_file *file; - - /* Whether the commit-graph file was already checked for validity. */ - bool checked; -}; - -/** Create a new commit-graph, optionally opening the underlying file. */ -int git_commit_graph_new(git_commit_graph **cgraph_out, const char *objects_dir, bool open_file); - -/** Open and validate a commit-graph file. */ -int git_commit_graph_file_open(git_commit_graph_file **file_out, const char *path); - -/* - * Attempt to get the git_commit_graph's commit-graph file. This object is - * still owned by the git_commit_graph. If the repository does not contain a commit graph, - * it will return GIT_ENOTFOUND. - * - * This function is not thread-safe. - */ -int git_commit_graph_get_file(git_commit_graph_file **file_out, git_commit_graph *cgraph); - -/* Marks the commit-graph file as needing a refresh. */ -void git_commit_graph_refresh(git_commit_graph *cgraph); - -/* - * A writer for `commit-graph` files. - */ -struct git_commit_graph_writer { - /* - * The path of the `objects/info` directory where the `commit-graph` will be - * stored. - */ - git_buf objects_info_dir; - - /* The list of packed commits. */ - git_vector commits; -}; - -/* - * Returns whether the git_commit_graph_file needs to be reloaded since the - * contents of the commit-graph file have changed on disk. - */ -bool git_commit_graph_file_needs_refresh( - const git_commit_graph_file *file, const char *path); - -int git_commit_graph_entry_find( - git_commit_graph_entry *e, - const git_commit_graph_file *file, - const git_oid *short_oid, - size_t len); -int git_commit_graph_entry_parent( - git_commit_graph_entry *parent, - const git_commit_graph_file *file, - const git_commit_graph_entry *entry, - size_t n); -int git_commit_graph_file_close(git_commit_graph_file *cgraph); -void git_commit_graph_file_free(git_commit_graph_file *cgraph); - -/* This is exposed for use in the fuzzers. */ -int git_commit_graph_file_parse( - git_commit_graph_file *file, - const unsigned char *data, - size_t size); - -#endif |