upstream/mercurial-mirror Files · hgext/inotify/common.py

mercurial: implement diff and join for dicts...

mercurial: implement diff and join for dicts Given two dicts, diff returns a dict containing all the keys that are present in one dict but not the other, or whose values are different between the dicts. The values are pairs of the values from the dicts, with missing values being represented as an optional argument, defaulting to None. Given two dicts, join performs what is known as an outer join in relational database land: it returns a dict containing all the keys across both dicts. The values are pairs as above, except they aren't compared to see if they're the same.

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      # server.py - inotify common protocol code

      #

      # Copyright 2006, 2007, 2008 Bryan O'Sullivan <bos@serpentine.com>

      # Copyright 2007, 2008 Brendan Cully <brendan@kublai.com>

      #

      # This software may be used and distributed according to the terms of the

      # GNU General Public License version 2 or any later version.

      import cStringIO, socket, struct

      """

        Protocol between inotify clients and server:

        Client sending query:

        1) send protocol version number

        2) send query type (string, 4 letters long)

        3) send query parameters:

           - For STAT, N+1 \0-separated strings:

              1) N different names that need checking

              2) 1 string containing all the status types to match

           - No parameter needed for DBUG

        Server sending query answer:

        1) send protocol version number

        2) send query type

        3) send struct.pack'ed headers describing the length of the content:

            e.g. for STAT, receive 9 integers describing the length of the

            9 \0-separated string lists to be read:

             * one file list for each lmar!?ic status type

             * one list containing the directories visited during lookup

      """

      version = 3

      resphdrfmts = {

          'STAT': '>lllllllll', # status requests

          'DBUG': '>l'          # debugging queries

      }

      resphdrsizes = dict((k, struct.calcsize(v))

                          for k, v in resphdrfmts.iteritems())

      def recvcs(sock):

          cs = cStringIO.StringIO()

          s = True

          try:

              while s:

                  s = sock.recv(65536)

                  cs.write(s)

          finally:

              sock.shutdown(socket.SHUT_RD)

          cs.seek(0)

          return cs

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				# server.py - inotify common protocol code
				#
				# Copyright 2006, 2007, 2008 Bryan O'Sullivan <bos@serpentine.com>
				# Copyright 2007, 2008 Brendan Cully <brendan@kublai.com>
				#
				# This software may be used and distributed according to the terms of the
				# GNU General Public License version 2 or any later version.

				import cStringIO, socket, struct

				"""
				Protocol between inotify clients and server:

				Client sending query:
				1) send protocol version number
				2) send query type (string, 4 letters long)
				3) send query parameters:
				- For STAT, N+1 \0-separated strings:
				1) N different names that need checking
				2) 1 string containing all the status types to match
				- No parameter needed for DBUG

				Server sending query answer:
				1) send protocol version number
				2) send query type
				3) send struct.pack'ed headers describing the length of the content:
				e.g. for STAT, receive 9 integers describing the length of the
				9 \0-separated string lists to be read:
				* one file list for each lmar!?ic status type
				* one list containing the directories visited during lookup

				"""

				version = 3

				resphdrfmts = {
				'STAT': '>lllllllll', # status requests
				'DBUG': '>l' # debugging queries
				}
				resphdrsizes = dict((k, struct.calcsize(v))
				for k, v in resphdrfmts.iteritems())

				def recvcs(sock):
				cs = cStringIO.StringIO()
				s = True
				try:
				while s:
				s = sock.recv(65536)
				cs.write(s)
				finally:
				sock.shutdown(socket.SHUT_RD)
				cs.seek(0)
				return cs