Function svn_relpath_dirname 

pub unsafe extern "C" fn svn_relpath_dirname(
    relpath: *const c_char,
    result_pool: *mut apr_pool_t,
) -> *mut c_char

Get the dirname of the specified canonicalized @a relpath, defined as the relpath with its basename removed.

If @a relpath is empty, “” is returned.

Allocate the result in @a result_pool.

@since New in 1.7.