+extern int cgit_get_cmd_index(const char *cmd);
+extern struct repoinfo *cgit_get_repoinfo(const char *url);
+extern void cgit_global_config_cb(const char *name, const char *value);
+extern void cgit_repo_config_cb(const char *name, const char *value);
+extern void cgit_querystring_cb(const char *name, const char *value);
+
+extern int chk_zero(int result, char *msg);
+extern int chk_positive(int result, char *msg);
+extern int chk_non_negative(int result, char *msg);
+
+extern int hextoint(char c);
+extern char *trim_end(const char *str, char c);
+extern char *strlpart(char *txt, int maxlen);
+extern char *strrpart(char *txt, int maxlen);
+
+extern void cgit_add_ref(struct reflist *list, struct refinfo *ref);
+extern int cgit_refs_cb(const char *refname, const unsigned char *sha1,
+ int flags, void *cb_data);
+
+extern void *cgit_free_commitinfo(struct commitinfo *info);
+
+extern int cgit_diff_files(const unsigned char *old_sha1,
+ const unsigned char *new_sha1,
+ linediff_fn fn);
+
+extern void cgit_diff_tree(const unsigned char *old_sha1,
+ const unsigned char *new_sha1,
+ filepair_fn fn, const char *prefix);
+
+extern void cgit_diff_commit(struct commit *commit, filepair_fn fn);
+