md5_tstamp.py 文件源码

def h_file(filename):
        st = os.stat(filename)
        if stat.S_ISDIR(st[stat.ST_MODE]): raise IOError('not a file')

        if filename in Build.hashes_md5_tstamp:
            if Build.hashes_md5_tstamp[filename][0] == str(st.st_mtime):
                return Build.hashes_md5_tstamp[filename][1]
        if STRONGEST:
            ret = Utils.h_file_no_md5(filename)
            Build.hashes_md5_tstamp[filename] = (str(st.st_mtime), ret)
            return ret
        else:
            m = Utils.md5()
            m.update(str(st.st_mtime))
            m.update(str(st.st_size))
            m.update(filename)
            Build.hashes_md5_tstamp[filename] = (str(st.st_mtime), m.digest())
            return m.digest()