| Guido van Rossum | 73b715e | 1992-06-03 16:50:01 +0000 | [diff] [blame] | 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().init() |
| 8 | # c = Cdplayer().init(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 | |
| 17 | cdplayerrc = '.cdplayerrc' |
| 18 | |
| 19 | class Cdplayer(): |
| 20 | def init(self, tracklist): |
| 21 | import string |
| 22 | self.artist = '' |
| 23 | self.title = '' |
| 24 | self.track = [None] + [''] * len(tracklist) |
| 25 | self.id = 'd' + string.zfill(len(tracklist), 2) |
| 26 | for track in tracklist: |
| 27 | start, length = track |
| 28 | self.id = self.id + string.zfill(length[0], 2) + \ |
| 29 | string.zfill(length[1], 2) |
| 30 | try: |
| 31 | import posix |
| 32 | f = open(posix.environ['HOME'] + '/' + cdplayerrc, 'r') |
| 33 | except IOError: |
| 34 | return self |
| 35 | import regex |
| 36 | reg = regex.compile('^\\([^:]*\\):\t\\(.*\\)') |
| 37 | s = self.id + '.' |
| 38 | l = len(s) |
| 39 | while 1: |
| 40 | line = f.readline() |
| 41 | if line == '': |
| 42 | break |
| 43 | if line[:l] == s: |
| 44 | line = line[l:] |
| 45 | if reg.match(line) == -1: |
| 46 | print 'syntax error in ~/' + cdplayerrc |
| 47 | continue |
| 48 | name = line[reg.regs[1][0]:reg.regs[1][1]] |
| 49 | value = line[reg.regs[2][0]:reg.regs[2][1]] |
| 50 | if name == 'title': |
| 51 | self.title = value |
| 52 | elif name == 'artist': |
| 53 | self.artist = value |
| 54 | elif name[:5] == 'track': |
| 55 | trackno = string.atoi(name[6:]) |
| 56 | self.track[trackno] = value |
| 57 | f.close() |
| 58 | return self |
| 59 | |
| 60 | def write(self): |
| 61 | import posix |
| 62 | filename = posix.environ['HOME'] + '/' + cdplayerrc |
| 63 | try: |
| 64 | old = open(filename, 'r') |
| 65 | except IOError: |
| 66 | old = open('/dev/null', 'r') |
| 67 | new = open(filename + '.new', 'w') |
| 68 | s = self.id + '.' |
| 69 | l = len(s) |
| 70 | while 1: |
| 71 | line = old.readline() |
| 72 | if line == '': |
| 73 | break |
| 74 | if line[:l] <> s: |
| 75 | new.write(line) |
| 76 | new.write(self.id + '.title:\t' + self.title + '\n') |
| 77 | new.write(self.id + '.artist:\t' + self.artist + '\n') |
| 78 | for i in range(1, len(self.track)): |
| 79 | new.write(self.id + '.track.' + `i` + ':\t' + \ |
| 80 | self.track[i] + '\n') |
| 81 | old.close() |
| 82 | new.close() |
| 83 | posix.rename(filename + '.new', filename) |