mirror of https://github.com/python/cpython
84 lines
2.2 KiB
Python
84 lines
2.2 KiB
Python
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# This file implements a class which forms an interface to the .cdplayerrc
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# file that is maintained by SGI's cdplayer program.
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#
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# Usage is as follows:
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#
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# import readcd
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# r = readcd.Readcd().init()
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# c = Cdplayer().init(r.gettrackinfo())
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#
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# Now you can use c.artist, c.title and c.track[trackno] (where trackno
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# starts at 1). When the CD is not recognized, all values will be the empty
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# string.
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# It is also possible to set the above mentioned variables to new values.
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# You can then use c.write() to write out the changed values to the
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# .cdplayerrc file.
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cdplayerrc = '.cdplayerrc'
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class Cdplayer():
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def init(self, tracklist):
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import string
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self.artist = ''
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self.title = ''
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self.track = [None] + [''] * len(tracklist)
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self.id = 'd' + string.zfill(len(tracklist), 2)
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for track in tracklist:
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start, length = track
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self.id = self.id + string.zfill(length[0], 2) + \
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string.zfill(length[1], 2)
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try:
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import posix
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f = open(posix.environ['HOME'] + '/' + cdplayerrc, 'r')
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except IOError:
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return self
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import regex
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reg = regex.compile('^\\([^:]*\\):\t\\(.*\\)')
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s = self.id + '.'
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l = len(s)
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while 1:
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line = f.readline()
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if line == '':
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break
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if line[:l] == s:
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line = line[l:]
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if reg.match(line) == -1:
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print 'syntax error in ~/' + cdplayerrc
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continue
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name = line[reg.regs[1][0]:reg.regs[1][1]]
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value = line[reg.regs[2][0]:reg.regs[2][1]]
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if name == 'title':
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self.title = value
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elif name == 'artist':
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self.artist = value
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elif name[:5] == 'track':
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trackno = string.atoi(name[6:])
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self.track[trackno] = value
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f.close()
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return self
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def write(self):
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import posix
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filename = posix.environ['HOME'] + '/' + cdplayerrc
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try:
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old = open(filename, 'r')
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except IOError:
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old = open('/dev/null', 'r')
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new = open(filename + '.new', 'w')
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s = self.id + '.'
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l = len(s)
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while 1:
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line = old.readline()
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if line == '':
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break
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if line[:l] <> s:
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new.write(line)
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new.write(self.id + '.title:\t' + self.title + '\n')
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new.write(self.id + '.artist:\t' + self.artist + '\n')
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for i in range(1, len(self.track)):
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new.write(self.id + '.track.' + `i` + ':\t' + \
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self.track[i] + '\n')
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old.close()
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new.close()
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posix.rename(filename + '.new', filename)
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