Changed revpool's object table to support arbitrary objects

git_revpool_object now has a type identifier for each object
type in a revpool (commits, trees, blobs, etc).

Trees can now be stored in the revision pool.

git_revpool_tableit now supports filtering objects by their
type when iterating through the object table.

Signed-off-by: Vicent Marti <tanoku@gmail.com>

src/commit.c

@@ -34,6 +34,12 @@
     printf("Oid: %s | In degree: %d | Time: %u\n", oid, commit->in_degree, commit->commit_time);\
 }
 
+void git_commit__free(git_commit *commit)
+{
+	git_commit_list_clear(&commit->parents, 0);
+	free(commit);
+}
+
 const git_oid *git_commit_id(git_commit *c)
 {
 	return &c->object.id;
@@ -104,7 +110,7 @@ git_commit *git_commit_lookup(git_revpool *pool, const git_oid *id)
 	if (pool == NULL)
 		return NULL;
 
-	commit = (git_commit *)git_revpool_table_lookup(pool->commits, id);
+	commit = (git_commit *)git_revpool_table_lookup(pool->objects, id);
 	if (commit != NULL)
 		return commit;
 
@@ -118,8 +124,9 @@ git_commit *git_commit_lookup(git_revpool *pool, const git_oid *id)
 	/* Initialize parent object */
 	git_oid_cpy(&commit->object.id, id);
 	commit->object.pool = pool;
+	commit->object.type = GIT_OBJ_COMMIT;
 
-	git_revpool_table_insert(pool->commits, (git_revpool_object *)commit);
+	git_revpool_table_insert(pool->objects, (git_revpool_object *)commit);
 
 	return commit;
 }

src/commit.h

@@ -36,6 +36,7 @@ struct git_commit {
 			 flags:26;
 };
 
+void git_commit__free(git_commit *c);
 int git_commit__parse_oid(git_oid *oid, char **buffer_out, const char *buffer_end, const char *header);
 int git_commit__parse_buffer(git_commit *commit, void *data, size_t len);
 int git_commit__parse_time(time_t *commit_time, char *buffer, const char *buffer_end);

src/revobject.c

@@ -197,3 +197,14 @@ git_revpool_object *git_revpool_tableit_next(git_revpool_tableit *it)
 
 	return next->object;
 }
+
+git_revpool_object *git_revpool_tableit_nextfilter(git_revpool_tableit *it, git_otype type)
+{
+	git_revpool_object *obj;
+
+	do {
+		obj = git_revpool_tableit_next(it);
+	} while (obj != NULL && obj->type != type);
+
+	return obj;
+}

src/revobject.h

@@ -3,10 +3,12 @@
 
 #include "git/common.h"
 #include "git/oid.h"
+#include "git/odb.h"
 
 struct git_revpool_object {
 	git_oid id;
 	git_revpool *pool;
+	git_otype type;
 };
 
 struct git_revpool_node {
@@ -44,6 +46,7 @@ void git_revpool_table_free(git_revpool_table *table);
 
 
 git_revpool_object *git_revpool_tableit_next(git_revpool_tableit *it);
+git_revpool_object *git_revpool_tableit_nextfilter(git_revpool_tableit *it, git_otype type);
 void git_revpool_tableit_init(git_revpool_table *table, git_revpool_tableit *it);
 
 #endif

src/revwalk.c

@@ -37,7 +37,7 @@ git_revpool *gitrp_alloc(git_odb *db)
 
 	memset(walk, 0x0, sizeof(git_revpool));
 
-	walk->commits = git_revpool_table_create(default_table_size);
+	walk->objects = git_revpool_table_create(default_table_size);
 
 	walk->db = db;
 	return walk;
@@ -45,20 +45,29 @@ git_revpool *gitrp_alloc(git_odb *db)
 
 void gitrp_free(git_revpool *walk)
 {
-	git_commit *commit;
+	git_revpool_object *obj;
 	git_revpool_tableit it;
 
 	git_commit_list_clear(&(walk->iterator), 0);
 	git_commit_list_clear(&(walk->roots), 0);
 
-	git_revpool_tableit_init(walk->commits, &it);
+	git_revpool_tableit_init(walk->objects, &it);
+
+	while ((obj = git_revpool_tableit_next(&it)) != NULL) {
+		switch (obj->type) {
+
+		case GIT_OBJ_COMMIT:
+			git_commit__free((git_commit *)obj);
+			break;
 
-	while ((commit = (git_commit *)git_revpool_tableit_next(&it)) != NULL) {
-		git_commit_list_clear(&commit->parents, 0);
-		free(commit);
+
+		default:
+			free(obj);
+			break;
+		}
 	}
 
-	git_revpool_table_free(walk->commits);
+	git_revpool_table_free(walk->objects);
 
 	free(walk);
 }
@@ -182,9 +191,12 @@ void gitrp_reset(git_revpool *pool)
 	git_commit *commit;
 	git_revpool_tableit it;
 
-	git_revpool_tableit_init(pool->commits, &it);
+	git_revpool_tableit_init(pool->objects, &it);
+
+	while ((commit =
+			(git_commit *)git_revpool_tableit_nextfilter(
+				&it, GIT_OBJ_COMMIT)) != NULL) {
 
-	while ((commit = (git_commit *)git_revpool_tableit_next(&it)) != NULL) {
 		commit->seen = 0;
 		commit->topo_delay = 0;
 		commit->in_degree = 0;

src/revwalk.h

@@ -4,6 +4,8 @@
 #include "git/common.h"
 #include "git/revwalk.h"
 
+#include "commit.h"
+
 struct git_revpool {
 	git_odb *db;
 
@@ -11,7 +13,7 @@ struct git_revpool {
 	git_commit *(*next_commit)(git_commit_list *);
 
 	git_commit_list roots;
-	git_revpool_table *commits;
+	git_revpool_table *objects;
 
 	unsigned walking:1;
 	unsigned int sorting;