Lib/plat-irix6/cdplayer.py

   1 # This file implements a class which forms an interface to the .cdplayerrc
   2 # file that is maintained by SGI's cdplayer program.
   3 #
   4 # Usage is as follows:
   5 #
   6 # import readcd
   7 # r = readcd.Readcd()
   8 # c = Cdplayer(r.gettrackinfo())
   9 #
  10 # Now you can use c.artist, c.title and c.track[trackno] (where trackno
  11 # starts at 1).  When the CD is not recognized, all values will be the empty
  12 # string.
  13 # It is also possible to set the above mentioned variables to new values.
  14 # You can then use c.write() to write out the changed values to the
  15 # .cdplayerrc file.
  16 from warnings import warnpy3k
  17 warnpy3k("the cdplayer module has been removed in Python 3.0", stacklevel=2)
  18 del warnpy3k
  19
  20 cdplayerrc = '.cdplayerrc'
  21
  22 class Cdplayer:
  23     def __init__(self, tracklist):
  24         import string
  25         self.artist = ''
  26         self.title = ''
  27         if type(tracklist) == type(''):
  28             t = []
  29             for i in range(2, len(tracklist), 4):
  30                 t.append((None, \
  31                           (int(tracklist[i:i+2]), \
  32                            int(tracklist[i+2:i+4]))))
  33             tracklist = t
  34         self.track = [None] + [''] * len(tracklist)
  35         self.id = 'd' + string.zfill(len(tracklist), 2)
  36         for track in tracklist:
  37             start, length = track
  38             self.id = self.id + string.zfill(length[0], 2) + \
  39                       string.zfill(length[1], 2)
  40         try:
  41             import posix
  42             f = open(posix.environ['HOME'] + '/' + cdplayerrc, 'r')
  43         except IOError:
  44             return
  45         import re
  46         reg = re.compile(r'^([^:]*):\t(.*)')
  47         s = self.id + '.'
  48         l = len(s)
  49         while 1:
  50             line = f.readline()
  51             if line == '':
  52                 break
  53             if line[:l] == s:
  54                 line = line[l:]
  55                 match = reg.match(line)
  56                 if not match:
  57                     print 'syntax error in ~/' + cdplayerrc
  58                     continue
  59                 name, value = match.group(1, 2)
  60                 if name == 'title':
  61                     self.title = value
  62                 elif name == 'artist':
  63                     self.artist = value
  64                 elif name[:5] == 'track':
  65                     trackno = int(name[6:])
  66                     self.track[trackno] = value
  67         f.close()
  68
  69     def write(self):
  70         import posix
  71         filename = posix.environ['HOME'] + '/' + cdplayerrc
  72         try:
  73             old = open(filename, 'r')
  74         except IOError:
  75             old = open('/dev/null', 'r')
  76         new = open(filename + '.new', 'w')
  77         s = self.id + '.'
  78         l = len(s)
  79         while 1:
  80             line = old.readline()
  81             if line == '':
  82                 break
  83             if line[:l] != s:
  84                 new.write(line)
  85         new.write(self.id + '.title:\t' + self.title + '\n')
  86         new.write(self.id + '.artist:\t' + self.artist + '\n')
  87         for i in range(1, len(self.track)):
  88             new.write('%s.track.%r:\t%s\n' % (i, track))
  89         old.close()
  90         new.close()
  91         posix.rename(filename + '.new', filename)