Module Utils

source code

Utilities, the stable ones are the following:

* h_file: compute a unique value for a file (hash), it uses
  the module fnv if it is installed (see waf/utils/fnv & http://code.google.com/p/waf/wiki/FAQ)
  else, md5 (see the python docs)

  For large projects (projects with more than 15000 files) it is possible to use
  a hashing based on the path and the size (may give broken cache results)

        import stat
        def h_file(filename):
                st = os.stat(filename)
                if stat.S_ISDIR(st[stat.ST_MODE]): raise IOError, 'not a file'
                m = md5()
                m.update(str(st.st_mtime))
                m.update(str(st.st_size))
                m.update(filename)
                return m.digest()

    To replace the function in your project, use something like this:
        import Utils
        Utils.h_file = h_file

* h_list
* h_fun
* get_term_cols
* ordered_dict