Permalink
Cannot retrieve contributors at this time
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
135 lines (114 sloc)
3.67 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #include "cache.h" | |
| #include "diff.h" | |
| #include "commit.h" | |
| #include "hash-lookup.h" | |
| #include "patch-ids.h" | |
| static int patch_id_defined(struct commit *commit) | |
| { | |
| /* must be 0 or 1 parents */ | |
| return !commit->parents || !commit->parents->next; | |
| } | |
| int commit_patch_id(struct commit *commit, struct diff_options *options, | |
| struct object_id *oid, int diff_header_only, int stable) | |
| { | |
| if (!patch_id_defined(commit)) | |
| return -1; | |
| if (commit->parents) | |
| diff_tree_oid(&commit->parents->item->object.oid, | |
| &commit->object.oid, "", options); | |
| else | |
| diff_root_tree_oid(&commit->object.oid, "", options); | |
| diffcore_std(options); | |
| return diff_flush_patch_id(options, oid, diff_header_only, stable); | |
| } | |
| /* | |
| * When we cannot load the full patch-id for both commits for whatever | |
| * reason, the function returns -1 (i.e. return error(...)). Despite | |
| * the "neq" in the name of this function, the caller only cares about | |
| * the return value being zero (a and b are equivalent) or non-zero (a | |
| * and b are different), and returning non-zero would keep both in the | |
| * result, even if they actually were equivalent, in order to err on | |
| * the side of safety. The actual value being negative does not have | |
| * any significance; only that it is non-zero matters. | |
| */ | |
| static int patch_id_neq(const void *cmpfn_data, | |
| const struct hashmap_entry *eptr, | |
| const struct hashmap_entry *entry_or_key, | |
| const void *unused_keydata) | |
| { | |
| /* NEEDSWORK: const correctness? */ | |
| struct diff_options *opt = (void *)cmpfn_data; | |
| struct patch_id *a, *b; | |
| a = container_of(eptr, struct patch_id, ent); | |
| b = container_of(entry_or_key, struct patch_id, ent); | |
| if (is_null_oid(&a->patch_id) && | |
| commit_patch_id(a->commit, opt, &a->patch_id, 0, 0)) | |
| return error("Could not get patch ID for %s", | |
| oid_to_hex(&a->commit->object.oid)); | |
| if (is_null_oid(&b->patch_id) && | |
| commit_patch_id(b->commit, opt, &b->patch_id, 0, 0)) | |
| return error("Could not get patch ID for %s", | |
| oid_to_hex(&b->commit->object.oid)); | |
| return !oideq(&a->patch_id, &b->patch_id); | |
| } | |
| int init_patch_ids(struct repository *r, struct patch_ids *ids) | |
| { | |
| memset(ids, 0, sizeof(*ids)); | |
| repo_diff_setup(r, &ids->diffopts); | |
| ids->diffopts.detect_rename = 0; | |
| ids->diffopts.flags.recursive = 1; | |
| diff_setup_done(&ids->diffopts); | |
| hashmap_init(&ids->patches, patch_id_neq, &ids->diffopts, 256); | |
| return 0; | |
| } | |
| int free_patch_ids(struct patch_ids *ids) | |
| { | |
| hashmap_clear_and_free(&ids->patches, struct patch_id, ent); | |
| return 0; | |
| } | |
| static int init_patch_id_entry(struct patch_id *patch, | |
| struct commit *commit, | |
| struct patch_ids *ids) | |
| { | |
| struct object_id header_only_patch_id; | |
| patch->commit = commit; | |
| if (commit_patch_id(commit, &ids->diffopts, &header_only_patch_id, 1, 0)) | |
| return -1; | |
| hashmap_entry_init(&patch->ent, oidhash(&header_only_patch_id)); | |
| return 0; | |
| } | |
| struct patch_id *patch_id_iter_first(struct commit *commit, | |
| struct patch_ids *ids) | |
| { | |
| struct patch_id patch; | |
| if (!patch_id_defined(commit)) | |
| return NULL; | |
| memset(&patch, 0, sizeof(patch)); | |
| if (init_patch_id_entry(&patch, commit, ids)) | |
| return NULL; | |
| return hashmap_get_entry(&ids->patches, &patch, ent, NULL); | |
| } | |
| struct patch_id *patch_id_iter_next(struct patch_id *cur, | |
| struct patch_ids *ids) | |
| { | |
| return hashmap_get_next_entry(&ids->patches, cur, ent); | |
| } | |
| int has_commit_patch_id(struct commit *commit, | |
| struct patch_ids *ids) | |
| { | |
| return !!patch_id_iter_first(commit, ids); | |
| } | |
| struct patch_id *add_commit_patch_id(struct commit *commit, | |
| struct patch_ids *ids) | |
| { | |
| struct patch_id *key; | |
| if (!patch_id_defined(commit)) | |
| return NULL; | |
| CALLOC_ARRAY(key, 1); | |
| if (init_patch_id_entry(key, commit, ids)) { | |
| free(key); | |
| return NULL; | |
| } | |
| hashmap_add(&ids->patches, &key->ent); | |
| return key; | |
| } |