get_ref_dir(): return early if directory cannot be read

[thirdparty/git.git] / commit.c

diff --git a/commit.c b/commit.c
index 4b39c19123c7fa8584a67d5fd91e11f89e5816e4..b80a45281ccf4234b685954651db4249201e60db 100644 (file)
--- a/commit.c
+++ b/commit.c
@@ -7,6 +7,7 @@
 #include "revision.h"
 #include "notes.h"
 #include "gpg-interface.h"
+#include "mergesort.h"
 
 int save_commit_buffer = 1;
 
@@ -360,6 +361,21 @@ struct commit_list *commit_list_insert(struct commit *item, struct commit_list *
        return new_list;
 }
 
+void commit_list_reverse(struct commit_list **list_p)
+{
+       struct commit_list *prev = NULL, *curr = *list_p, *next;
+
+       if (!list_p)
+               return;
+       while (curr) {
+               next = curr->next;
+               curr->next = prev;
+               prev = curr;
+               curr = next;
+       }
+       *list_p = prev;
+}
+
 unsigned commit_list_count(const struct commit_list *l)
 {
        unsigned c = 0;
@@ -390,15 +406,31 @@ struct commit_list * commit_list_insert_by_date(struct commit *item, struct comm
        return commit_list_insert(item, pp);
 }
 
+static int commit_list_compare_by_date(const void *a, const void *b)
+{
+       unsigned long a_date = ((const struct commit_list *)a)->item->date;
+       unsigned long b_date = ((const struct commit_list *)b)->item->date;
+       if (a_date < b_date)
+               return 1;
+       if (a_date > b_date)
+               return -1;
+       return 0;
+}
+
+static void *commit_list_get_next(const void *a)
+{
+       return ((const struct commit_list *)a)->next;
+}
+
+static void commit_list_set_next(void *a, void *next)
+{
+       ((struct commit_list *)a)->next = next;
+}
 
 void commit_list_sort_by_date(struct commit_list **list)
 {
-       struct commit_list *ret = NULL;
-       while (*list) {
-               commit_list_insert_by_date((*list)->item, &ret);
-               *list = (*list)->next;
-       }
-       *list = ret;
+       *list = llist_mergesort(*list, commit_list_get_next, commit_list_set_next,
+                               commit_list_compare_by_date);
 }
 
 struct commit *pop_most_recent_commit(struct commit_list **list,