From: Linus Torvalds Date: Fri, 10 Aug 2007 05:21:29 +0000 (-0700) Subject: Start moving unpack-trees to "struct tree_desc" X-Git-Tag: v1.5.3-rc5~39^2 X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=933bf40;p=git.git Start moving unpack-trees to "struct tree_desc" This doesn't actually change any real code, but it changes the interface to unpack_trees() to take an array of "struct tree_desc" entries, the same way the tree-walk.c functions do. The reason for this is that we would be much better off if we can do the tree-unpacking using the generic "traverse_trees()" functionality instead of having to the special "unpack" infrastructure. This really is a pretty minimal diff, just to change the calling convention. It passes all the tests, and looks sane. There were only two users of "unpack_trees()": builtin-read-tree and merge-recursive, and I tried to keep the changes minimal. Signed-off-by: Linus Torvalds Signed-off-by: Junio C Hamano --- diff --git a/builtin-read-tree.c b/builtin-read-tree.c index a3b17a3bd..1967d100f 100644 --- a/builtin-read-tree.c +++ b/builtin-read-tree.c @@ -13,14 +13,19 @@ #include "dir.h" #include "builtin.h" -static struct object_list *trees; +static int nr_trees; +static struct tree *trees[4]; static int list_tree(unsigned char *sha1) { - struct tree *tree = parse_tree_indirect(sha1); + struct tree *tree; + + if (nr_trees >= 4) + return -1; + tree = parse_tree_indirect(sha1); if (!tree) return -1; - object_list_append(&tree->object, &trees); + trees[nr_trees++] = tree; return 0; } @@ -76,11 +81,10 @@ static void prime_cache_tree_rec(struct cache_tree *it, struct tree *tree) static void prime_cache_tree(void) { - struct tree *tree = (struct tree *)trees->item; - if (!tree) + if (!nr_trees) return; active_cache_tree = cache_tree(); - prime_cache_tree_rec(active_cache_tree, tree); + prime_cache_tree_rec(active_cache_tree, trees[0]); } @@ -92,6 +96,7 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix) { int i, newfd, stage = 0; unsigned char sha1[20]; + struct tree_desc t[3]; struct unpack_trees_options opts; memset(&opts, 0, sizeof(opts)); @@ -258,7 +263,12 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix) opts.head_idx = 1; } - unpack_trees(trees, &opts); + for (i = 0; i < nr_trees; i++) { + struct tree *tree = trees[i]; + parse_tree(tree); + init_tree_desc(t+i, tree->buffer, tree->size); + } + unpack_trees(nr_trees, t, &opts); /* * When reading only one tree (either the most basic form, @@ -266,7 +276,7 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix) * valid cache-tree because the index must match exactly * what came from the tree. */ - if (trees && trees->item && !opts.prefix && (!opts.merge || (stage == 2))) { + if (nr_trees && !opts.prefix && (!opts.merge || (stage == 2))) { cache_tree_free(&active_cache_tree); prime_cache_tree(); } diff --git a/merge-recursive.c b/merge-recursive.c index c8539ec0b..f7d1b8499 100644 --- a/merge-recursive.c +++ b/merge-recursive.c @@ -216,13 +216,19 @@ static int add_cacheinfo(unsigned int mode, const unsigned char *sha1, */ static int index_only = 0; +static void init_tree_desc_from_tree(struct tree_desc *desc, struct tree *tree) +{ + parse_tree(tree); + init_tree_desc(desc, tree->buffer, tree->size); +} + static int git_merge_trees(int index_only, struct tree *common, struct tree *head, struct tree *merge) { int rc; - struct object_list *trees = NULL; + struct tree_desc t[3]; struct unpack_trees_options opts; memset(&opts, 0, sizeof(opts)); @@ -234,11 +240,11 @@ static int git_merge_trees(int index_only, opts.head_idx = 2; opts.fn = threeway_merge; - object_list_append(&common->object, &trees); - object_list_append(&head->object, &trees); - object_list_append(&merge->object, &trees); + init_tree_desc_from_tree(t+0, common); + init_tree_desc_from_tree(t+1, head); + init_tree_desc_from_tree(t+2, merge); - rc = unpack_trees(trees, &opts); + rc = unpack_trees(3, t, &opts); cache_tree_free(&active_cache_tree); return rc; } diff --git a/unpack-trees.c b/unpack-trees.c index dfd985b0e..5d1ffd1a3 100644 --- a/unpack-trees.c +++ b/unpack-trees.c @@ -16,19 +16,13 @@ struct tree_entry_list { const unsigned char *sha1; }; -static struct tree_entry_list *create_tree_entry_list(struct tree *tree) +static struct tree_entry_list *create_tree_entry_list(struct tree_desc *desc) { - struct tree_desc desc; struct name_entry one; struct tree_entry_list *ret = NULL; struct tree_entry_list **list_p = &ret; - if (!tree->object.parsed) - parse_tree(tree); - - init_tree_desc(&desc, tree->buffer, tree->size); - - while (tree_entry(&desc, &one)) { + while (tree_entry(desc, &one)) { struct tree_entry_list *entry; entry = xmalloc(sizeof(struct tree_entry_list)); @@ -173,9 +167,11 @@ static int unpack_trees_rec(struct tree_entry_list **posns, int len, if (S_ISDIR(posns[i]->mode)) { struct tree *tree = lookup_tree(posns[i]->sha1); + struct tree_desc t; any_dirs = 1; parse_tree(tree); - subposns[i] = create_tree_entry_list(tree); + init_tree_desc(&t, tree->buffer, tree->size); + subposns[i] = create_tree_entry_list(&t); posns[i] = posns[i]->next; src[i + o->merge] = o->df_conflict_entry; continue; @@ -331,12 +327,10 @@ static void check_updates(struct cache_entry **src, int nr, stop_progress(&progress);; } -int unpack_trees(struct object_list *trees, struct unpack_trees_options *o) +int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options *o) { - unsigned len = object_list_length(trees); struct tree_entry_list **posns; int i; - struct object_list *posn = trees; struct tree_entry_list df_conflict_list; static struct cache_entry *dfc; @@ -356,10 +350,9 @@ int unpack_trees(struct object_list *trees, struct unpack_trees_options *o) if (len) { posns = xmalloc(len * sizeof(struct tree_entry_list *)); - for (i = 0; i < len; i++) { - posns[i] = create_tree_entry_list((struct tree *) posn->item); - posn = posn->next; - } + for (i = 0; i < len; i++) + posns[i] = create_tree_entry_list(t+i); + if (unpack_trees_rec(posns, len, o->prefix ? o->prefix : "", o, &df_conflict_list)) return -1; diff --git a/unpack-trees.h b/unpack-trees.h index fee7da438..9cd39a28a 100644 --- a/unpack-trees.h +++ b/unpack-trees.h @@ -26,7 +26,7 @@ struct unpack_trees_options { struct cache_entry *df_conflict_entry; }; -extern int unpack_trees(struct object_list *trees, +extern int unpack_trees(unsigned n, struct tree_desc *t, struct unpack_trees_options *options); int threeway_merge(struct cache_entry **stages, struct unpack_trees_options *o);