Since the cache-tree data is saved as part of the directory data, we already read it at the beginning of the index. The cache-tree is only converted from this directory data.
The cache-tree data is arranged in a tree, with the children sorted by pathlen at each node, while the ondisk format is sorted lexically. So we have to rebuild this format from the on-disk directory list. Signed-off-by: Thomas Gummerer <t.gumme...@gmail.com> --- cache-tree.c | 2 +- cache-tree.h | 1 + read-cache-v5.c | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 80 insertions(+), 1 deletion(-) diff --git a/cache-tree.c b/cache-tree.c index 0bbec43..1209732 100644 --- a/cache-tree.c +++ b/cache-tree.c @@ -31,7 +31,7 @@ void cache_tree_free(struct cache_tree **it_p) *it_p = NULL; } -static int subtree_name_cmp(const char *one, int onelen, +int subtree_name_cmp(const char *one, int onelen, const char *two, int twolen) { if (onelen < twolen) diff --git a/cache-tree.h b/cache-tree.h index f1923ad..9818926 100644 --- a/cache-tree.h +++ b/cache-tree.h @@ -25,6 +25,7 @@ struct cache_tree *cache_tree(void); void cache_tree_free(struct cache_tree **); void cache_tree_invalidate_path(struct cache_tree *, const char *); struct cache_tree_sub *cache_tree_sub(struct cache_tree *, const char *); +int subtree_name_cmp(const char *, int, const char *, int); void cache_tree_write(struct strbuf *, struct cache_tree *root); struct cache_tree *cache_tree_read(const char *buffer, unsigned long size); diff --git a/read-cache-v5.c b/read-cache-v5.c index 85a2069..b14505a 100644 --- a/read-cache-v5.c +++ b/read-cache-v5.c @@ -471,6 +471,83 @@ static int convert_resolve_undo(struct index_state *istate, return 0; } +static struct cache_tree *convert_one(struct directory_entry *de) +{ + int i; + struct cache_tree *it; + + it = cache_tree(); + it->entry_count = de->de_nentries; + if (0 <= it->entry_count) + hashcpy(it->sha1, de->sha1); + + /* + * Just a heuristic -- we do not add directories that often but + * we do not want to have to extend it immediately when we do, + * hence +2. + */ + it->subtree_alloc = de->de_nsubtrees + 2; + it->down = xcalloc(it->subtree_alloc, sizeof(struct cache_tree_sub *)); + for (i = 0; i < de->de_nsubtrees; i++) { + struct cache_tree *sub; + struct cache_tree_sub *subtree; + char *buf, *name; + + sub = convert_one(de->sub[i]); + if(!sub) + goto free_return; + + name = ""; + buf = strtok(de->sub[i]->pathname, "/"); + while (buf) { + name = buf; + buf = strtok(NULL, "/"); + } + subtree = cache_tree_sub(it, name); + subtree->cache_tree = sub; + } + if (de->de_nsubtrees != it->subtree_nr) + die("cache-tree: internal error"); + return it; + free_return: + cache_tree_free(&it); + return NULL; +} + +static int compare_cache_tree_elements(const void *a, const void *b) +{ + const struct directory_entry *de1, *de2; + + de1 = (const struct directory_entry *) a; + de2 = (const struct directory_entry *) b; + return subtree_name_cmp(de1->pathname, de1->de_pathlen, + de2->pathname, de2->de_pathlen); +} + +static void sort_directories(struct directory_entry *de) +{ + int i; + + for (i = 0; i < de->de_nsubtrees; i++) { + if (de->sub[i]->de_nsubtrees) + sort_directories(de->sub[i]); + } + qsort(de->sub, de->de_nsubtrees, sizeof(struct directory_entry *), + compare_cache_tree_elements); +} + +/* + * This function modifies the directory argument that is given to it. + * Don't use it if the directory entries are still needed after. + */ +static struct cache_tree *cache_tree_convert_v5(struct directory_entry *de) +{ + if (!de->de_nentries) + return NULL; + sort_directories(de); + return convert_one(de); +} + static int read_entries(struct index_state *istate, struct directory_entry *de, unsigned int first_entry_offset, void *mmap, unsigned long mmap_size, unsigned int *nr, @@ -591,6 +668,7 @@ static int read_index_v5(struct index_state *istate, void *mmap, } de = de->next; } + istate->cache_tree = cache_tree_convert_v5(root_directory); istate->cache_nr = nr; return 0; } -- 1.8.3.4.1231.g9fbf354.dirty -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html