+void sort_by_date(struct commit_list **list);
+
+/* Commit formats */
+enum cmit_fmt {
+ CMIT_FMT_RAW,
+ CMIT_FMT_MEDIUM,
+ CMIT_FMT_DEFAULT = CMIT_FMT_MEDIUM,
+ CMIT_FMT_SHORT,
+ CMIT_FMT_FULL,
+};
+
+extern enum cmit_fmt get_commit_format(const char *arg);
+extern unsigned long pretty_print_commit(enum cmit_fmt fmt, const char *msg, unsigned long len, char *buf, unsigned long space);
+
+void insert_by_date(struct commit_list **list, struct commit *item);
+
+/** Removes the first commit from a list sorted by date, and adds all
+ * of its parents.
+ **/
+struct commit *pop_most_recent_commit(struct commit_list **list,
+ unsigned int mark);
+
+struct commit *pop_commit(struct commit_list **stack);
+
+int count_parents(struct commit * commit);