import _hotshotimport os.pathimport parserimport symbolimport sys from _hotshot import \     WHAT_ENTER, \     WHAT_EXIT, \     WHAT_LINENO, \     WHAT_DEFINE_FILE, \     WHAT_DEFINE_FUNC, \     WHAT_ADD_INFO  __all__ = ["LogReader", "ENTER", "EXIT", "LINE"]  ENTER = WHAT_ENTEREXIT  = WHAT_EXITLINE  = WHAT_LINENO  class LogReader:    def __init__(self, logfn):        # fileno -> filename        self._filemap = {}        # (fileno, lineno) -> filename, funcname        self._funcmap = {}         self._reader = _hotshot.logreader(logfn)        self._nextitem = self._reader.next        self._info = self._reader.info        if self._info.has_key('current-directory'):            self.cwd = self._info['current-directory']        else:            self.cwd = None         # This mirrors the call stack of the profiled code as the log        # is read back in.  It contains tuples of the form:        #        #   (file name, line number of function def, function name)        #        self._stack = []        self._append = self._stack.append        self._pop = self._stack.pop     def close(self):        self._reader.close()     def fileno(self):        """Return the file descriptor of the log reader's log file."""        return self._reader.fileno()     def addinfo(self, key, value):        """This method is called for each additional ADD_INFO record.         This can be overridden by applications that want to receive        these events.  The default implementation does not need to be        called by alternate implementations.         The initial set of ADD_INFO records do not pass through this        mechanism; this is only needed to receive notification when        new values are added.  Subclasses can inspect self._info after        calling LogReader.__init__().        """        pass     def get_filename(self, fileno):        try:            return self._filemap[fileno]        except KeyError:            raise ValueError, "unknown fileno"     def get_filenames(self):        return self._filemap.values()     def get_fileno(self, filename):        filename = os.path.normcase(os.path.normpath(filename))        for fileno, name in self._filemap.items():            if name == filename:                return fileno        raise ValueError, "unknown filename"     def get_funcname(self, fileno, lineno):        try:            return self._funcmap[(fileno, lineno)]        except KeyError:            raise ValueError, "unknown function location"     # Iteration support:    # This adds an optional (& ignored) parameter to next() so that the    # same bound method can be used as the __getitem__() method -- this    # avoids using an additional method call which kills the performance.     def next(self, index=0):        while 1:            # This call may raise StopIteration:            what, tdelta, fileno, lineno = self._nextitem()             # handle the most common cases first             if what == WHAT_ENTER:                filename, funcname = self._decode_location(fileno, lineno)                t = (filename, lineno, funcname)                self._append(t)                return what, t, tdelta             if what == WHAT_EXIT:                return what, self._pop(), tdelta             if what == WHAT_LINENO:                filename, firstlineno, funcname = self._stack[-1]                return what, (filename, lineno, funcname), tdelta             if what == WHAT_DEFINE_FILE:                filename = os.path.normcase(os.path.normpath(tdelta))                self._filemap[fileno] = filename            elif what == WHAT_DEFINE_FUNC:                filename = self._filemap[fileno]                self._funcmap[(fileno, lineno)] = (filename, tdelta)            elif what == WHAT_ADD_INFO:                # value already loaded into self.info; call the                # overridable addinfo() handler so higher-level code                # can pick up the new value                if tdelta == 'current-directory':                    self.cwd = lineno                self.addinfo(tdelta, lineno)            else:                raise ValueError, "unknown event type"     def __iter__(self):        return self     #    #  helpers    #     def _decode_location(self, fileno, lineno):        try:            return self._funcmap[(fileno, lineno)]        except KeyError:            #            # This should only be needed when the log file does not            # contain all the DEFINE_FUNC records needed to allow the            # function name to be retrieved from the log file.            #            if self._loadfile(fileno):                filename = funcname = None            try:                filename, funcname = self._funcmap[(fileno, lineno)]            except KeyError:                filename = self._filemap.get(fileno)                funcname = None                self._funcmap[(fileno, lineno)] = (filename, funcname)        return filename, funcname     def _loadfile(self, fileno):        try:            filename = self._filemap[fileno]        except KeyError:            print "Could not identify fileId", fileno            return 1        if filename is None:            return 1        absname = os.path.normcase(os.path.join(self.cwd, filename))         try:            fp = open(absname)        except IOError:            return        st = parser.suite(fp.read())        fp.close()         # Scan the tree looking for def and lambda nodes, filling in        # self._funcmap with all the available information.        funcdef = symbol.funcdef        lambdef = symbol.lambdef         stack = [st.totuple(1)]         while stack:            tree = stack.pop()            try:                sym = tree[0]            except (IndexError, TypeError):                continue            if sym == funcdef:                self._funcmap[(fileno, tree[2][2])] = filename, tree[2][1]            elif sym == lambdef:                self._funcmap[(fileno, tree[1][2])] = filename, "<lambda>"            stack.extend(list(tree[1:]))