mdw@git.distorted.org.uk Git - mLib-python/blob - fwatch.pyx

   1 ### -*-pyrex-*-
   2 ###
   3 ### Watching files for changes
   4 ###
   5 ### (c) 2007 Straylight/Edgeware
   6 ###
   7
   8 ###----- Licensing notice ---------------------------------------------------
   9 ###
  10 ### This file is part of the Python interface to mLib.
  11 ###
  12 ### mLib/Python is free software; you can redistribute it and/or modify
  13 ### it under the terms of the GNU General Public License as published by
  14 ### the Free Software Foundation; either version 2 of the License, or
  15 ### (at your option) any later version.
  16 ###
  17 ### mLib/Python is distributed in the hope that it will be useful,
  18 ### but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ### GNU General Public License for more details.
  21 ###
  22 ### You should have received a copy of the GNU General Public License
  23 ### along with mLib/Python; if not, write to the Free Software Foundation,
  24 ### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25
  26 cdef class FWatch:
  27   """
  28   FWatch(FILE): watch FILE for changes
  29
  30   FILE may be a string, file descriptor, or an object with a `fileno' method.
  31   """
  32   cdef fwatch fw
  33   cdef fobj
  34   cdef const char *fname
  35   cdef int fd
  36   def __cinit__(me):
  37     me.fname = NULL
  38     me.fd = -1
  39   cdef _setfile(me, object file):
  40     if TEXT_CHECK(file):
  41       me.fname = TEXT_PTR(file)
  42       me.fd = -1
  43     else:
  44       me.fd = _getfd(file)
  45       me.fname = NULL
  46     me.fobj = file
  47   def __init__(me, object file):
  48     me._setfile(file)
  49     if me.fname:
  50       fwatch_init(&me.fw, me.fname)
  51     else:
  52       fwatch_initfd(&me.fw, me.fd)
  53   @property
  54   def file(me):
  55     return me.fobj
  56   @file.setter
  57   def file(me, file):
  58     me._setfile(file)
  59   def update(me):
  60     """FW.update() -> RC: nonzero if the file has changed state"""
  61     cdef int rc
  62     if me.fname:
  63       return fwatch_update(&me.fw, me.fname)
  64     else:
  65       return fwatch_updatefd(&me.fw, me.fd)
  66
  67 ###----- That's all, folks --------------------------------------------------