[PATCH v2 12/14] log: use commit-slab in prepare_bases() instead of commit->util

[Nguyễn Thái Ngọc Duy]

It's done so that commit->util can be removed. See more explanation in
the commit that removes commit->util.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
---
 builtin/log.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/builtin/log.c b/builtin/log.c
index d017e57475..967fbc5caa 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -28,6 +28,7 @@
 #include "mailmap.h"
 #include "gpg-interface.h"
 #include "progress.h"
+#include "commit-slab.h"
 
 #define MAIL_DEFAULT_WRAP 72
 
@@ -1340,6 +1341,8 @@ static struct commit *get_base_commit(const char 
*base_commit,
        return base;
 }
 
+define_commit_slab(commit_base, int);
+
 static void prepare_bases(struct base_tree_info *bases,
                          struct commit *base,
                          struct commit **list,
@@ -1348,11 +1351,13 @@ static void prepare_bases(struct base_tree_info *bases,
        struct commit *commit;
        struct rev_info revs;
        struct diff_options diffopt;
+       struct commit_base commit_base;
        int i;
 
        if (!base)
                return;
 
+       init_commit_base(&commit_base);
        diff_setup(&diffopt);
        diffopt.flags.recursive = 1;
        diff_setup_done(&diffopt);
@@ -1365,7 +1370,7 @@ static void prepare_bases(struct base_tree_info *bases,
        for (i = 0; i < total; i++) {
                list[i]->object.flags &= ~UNINTERESTING;
                add_pending_object(&revs, &list[i]->object, "rev_list");
-               list[i]->util = (void *)1;
+               *commit_base_at(&commit_base, list[i]) = 1;
        }
        base->object.flags |= UNINTERESTING;
        add_pending_object(&revs, &base->object, "base");
@@ -1379,7 +1384,7 @@ static void prepare_bases(struct base_tree_info *bases,
        while ((commit = get_revision(&revs)) != NULL) {
                struct object_id oid;
                struct object_id *patch_id;
-               if (commit->util)
+               if (*commit_base_at(&commit_base, commit))
                        continue;
                if (commit_patch_id(commit, &diffopt, &oid, 0))
                        die(_("cannot get patch id"));
@@ -1388,6 +1393,7 @@ static void prepare_bases(struct base_tree_info *bases,
                oidcpy(patch_id, &oid);
                bases->nr_patch_id++;
        }
+       clear_commit_base(&commit_base);
 }
 
 static void print_bases(struct base_tree_info *bases, FILE *file)
-- 
2.17.0.705.g3525833791