branch: split validate_new_branchname() into two
[gitweb.git] / reflog-walk.c
index ba72020fc349d4ea9f9366ced9af43372980e988..842b2f77dc3e40a2eb296bfade00d9d2104ff9e1 100644 (file)
@@ -12,7 +12,7 @@ struct complete_reflogs {
        struct reflog_info {
                struct object_id ooid, noid;
                char *email;
-               unsigned long timestamp;
+               timestamp_t timestamp;
                int tz;
                char *message;
        } *items;
@@ -20,7 +20,7 @@ struct complete_reflogs {
 };
 
 static int read_one_reflog(struct object_id *ooid, struct object_id *noid,
-               const char *email, unsigned long timestamp, int tz,
+               const char *email, timestamp_t timestamp, int tz,
                const char *message, void *cb_data)
 {
        struct complete_reflogs *array = cb_data;
@@ -61,11 +61,10 @@ static struct complete_reflogs *read_complete_reflog(const char *ref)
        reflogs->ref = xstrdup(ref);
        for_each_reflog_ent(ref, read_one_reflog, reflogs);
        if (reflogs->nr == 0) {
-               struct object_id oid;
                const char *name;
                void *name_to_free;
                name = name_to_free = resolve_refdup(ref, RESOLVE_REF_READING,
-                                                    oid.hash, NULL);
+                                                    NULL, NULL);
                if (name) {
                        for_each_reflog_ent(name, read_one_reflog, reflogs);
                        free(name_to_free);
@@ -85,7 +84,7 @@ static struct complete_reflogs *read_complete_reflog(const char *ref)
 }
 
 static int get_reflog_recno_by_time(struct complete_reflogs *array,
-       unsigned long timestamp)
+       timestamp_t timestamp)
 {
        int i;
        for (i = array->nr - 1; i >= 0; i--)
@@ -94,45 +93,6 @@ static int get_reflog_recno_by_time(struct complete_reflogs *array,
        return -1;
 }
 
-struct commit_info_lifo {
-       struct commit_info {
-               struct commit *commit;
-               void *util;
-       } *items;
-       int nr, alloc;
-};
-
-static struct commit_info *get_commit_info(struct commit *commit,
-               struct commit_info_lifo *lifo, int pop)
-{
-       int i;
-       for (i = 0; i < lifo->nr; i++)
-               if (lifo->items[i].commit == commit) {
-                       struct commit_info *result = &lifo->items[i];
-                       if (pop) {
-                               if (i + 1 < lifo->nr)
-                                       memmove(lifo->items + i,
-                                               lifo->items + i + 1,
-                                               (lifo->nr - i) *
-                                               sizeof(struct commit_info));
-                               lifo->nr--;
-                       }
-                       return result;
-               }
-       return NULL;
-}
-
-static void add_commit_info(struct commit *commit, void *util,
-               struct commit_info_lifo *lifo)
-{
-       struct commit_info *info;
-       ALLOC_GROW(lifo->items, lifo->nr + 1, lifo->alloc);
-       info = lifo->items + lifo->nr;
-       info->commit = commit;
-       info->util = util;
-       lifo->nr++;
-}
-
 struct commit_reflog {
        int recno;
        enum selector_type {
@@ -144,7 +104,8 @@ struct commit_reflog {
 };
 
 struct reflog_walk_info {
-       struct commit_info_lifo reflogs;
+       struct commit_reflog **logs;
+       size_t nr, alloc;
        struct string_list complete_reflogs;
        struct commit_reflog *last_commit_reflog;
 };
@@ -158,7 +119,7 @@ void init_reflog_walk(struct reflog_walk_info **info)
 int add_reflog_for_walk(struct reflog_walk_info *info,
                struct commit *commit, const char *name)
 {
-       unsigned long timestamp = 0;
+       timestamp_t timestamp = 0;
        int recno = -1;
        struct string_list_item *item;
        struct complete_reflogs *reflogs;
@@ -189,9 +150,8 @@ int add_reflog_for_walk(struct reflog_walk_info *info,
                reflogs = item->util;
        else {
                if (*branch == '\0') {
-                       struct object_id oid;
                        free(branch);
-                       branch = resolve_refdup("HEAD", 0, oid.hash, NULL);
+                       branch = resolve_refdup("HEAD", 0, NULL, NULL);
                        if (!branch)
                                die ("No current branch");
 
@@ -233,52 +193,10 @@ int add_reflog_for_walk(struct reflog_walk_info *info,
        commit_reflog->selector = selector;
        commit_reflog->reflogs = reflogs;
 
-       add_commit_info(commit, commit_reflog, &info->reflogs);
-       return 0;
-}
-
-void fake_reflog_parent(struct reflog_walk_info *info, struct commit *commit)
-{
-       struct commit_info *commit_info =
-               get_commit_info(commit, &info->reflogs, 0);
-       struct commit_reflog *commit_reflog;
-       struct object *logobj;
-       struct reflog_info *reflog;
-
-       info->last_commit_reflog = NULL;
-       if (!commit_info)
-               return;
-
-       commit_reflog = commit_info->util;
-       if (commit_reflog->recno < 0) {
-               commit->parents = NULL;
-               return;
-       }
-       info->last_commit_reflog = commit_reflog;
-
-       do {
-               reflog = &commit_reflog->reflogs->items[commit_reflog->recno];
-               commit_reflog->recno--;
-               logobj = parse_object(reflog->ooid.hash);
-       } while (commit_reflog->recno && (logobj && logobj->type != OBJ_COMMIT));
-
-       if (!logobj && commit_reflog->recno >= 0 && is_null_sha1(reflog->ooid.hash)) {
-               /* a root commit, but there are still more entries to show */
-               reflog = &commit_reflog->reflogs->items[commit_reflog->recno];
-               logobj = parse_object(reflog->noid.hash);
-               if (!logobj)
-                       logobj = parse_object(reflog->ooid.hash);
-       }
-
-       if (!logobj || logobj->type != OBJ_COMMIT) {
-               commit_info->commit = NULL;
-               commit->parents = NULL;
-               return;
-       }
-       commit_info->commit = (struct commit *)logobj;
+       ALLOC_GROW(info->logs, info->nr + 1, info->alloc);
+       info->logs[info->nr++] = commit_reflog;
 
-       commit->parents = xcalloc(1, sizeof(struct commit_list));
-       commit->parents->item = commit_info->commit;
+       return 0;
 }
 
 void get_reflog_selector(struct strbuf *sb,
@@ -344,6 +262,18 @@ const char *get_reflog_ident(struct reflog_walk_info *reflog_info)
        return info->email;
 }
 
+timestamp_t get_reflog_timestamp(struct reflog_walk_info *reflog_info)
+{
+       struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
+       struct reflog_info *info;
+
+       if (!commit_reflog)
+               return 0;
+
+       info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
+       return info->timestamp;
+}
+
 void show_reflog_message(struct reflog_walk_info *reflog_info, int oneline,
                         const struct date_mode *dmode, int force_date)
 {
@@ -365,3 +295,53 @@ void show_reflog_message(struct reflog_walk_info *reflog_info, int oneline,
                strbuf_release(&selector);
        }
 }
+
+int reflog_walk_empty(struct reflog_walk_info *info)
+{
+       return !info || !info->nr;
+}
+
+static struct commit *next_reflog_commit(struct commit_reflog *log)
+{
+       for (; log->recno >= 0; log->recno--) {
+               struct reflog_info *entry = &log->reflogs->items[log->recno];
+               struct object *obj = parse_object(&entry->noid);
+
+               if (obj && obj->type == OBJ_COMMIT)
+                       return (struct commit *)obj;
+       }
+       return NULL;
+}
+
+static timestamp_t log_timestamp(struct commit_reflog *log)
+{
+       return log->reflogs->items[log->recno].timestamp;
+}
+
+struct commit *next_reflog_entry(struct reflog_walk_info *walk)
+{
+       struct commit_reflog *best = NULL;
+       struct commit *best_commit = NULL;
+       size_t i;
+
+       for (i = 0; i < walk->nr; i++) {
+               struct commit_reflog *log = walk->logs[i];
+               struct commit *commit = next_reflog_commit(log);
+
+               if (!commit)
+                       continue;
+
+               if (!best || log_timestamp(log) > log_timestamp(best)) {
+                       best = log;
+                       best_commit = commit;
+               }
+       }
+
+       if (best) {
+               best->recno--;
+               walk->last_commit_reflog = best;
+               return best_commit;
+       }
+
+       return NULL;
+}