Source Code for Module phone_media_codec

 1  ### BITPIM 
 2  ### 
 3  ### Copyright (C) 2003-2005 Joe Pham <djpham@bitpim.org> 
 4  ### 
 5  ### This program is free software; you can redistribute it and/or modify 
 6  ### it under the terms of the BitPim license as detailed in the LICENSE file. 
 7  ### 
 8  ### $Id: phone_media_codec.py 2369 2005-05-10 05:56:14Z djpham $ 
 9   
10  """ 
11  Codec for converting phone media file names to local file names. 
12  """ 
13   
14  # standard modules 
15  import codecs 
16   
17  # wx modules 
18  import wx 
19   
20  # BitPim modules 
21   
22  escape_char='%' 
23  bad_chars={ 
24      '__WXMSW__': (escape_char, '/', '\\', '[', ']', '?', '*', ':', 
25                    '"', '<', '>', '|', '=', ';'), 
26      '__WXMAC__': (escape_char, '/', ':'), 
27      '__WXGTK__': (escape_char, '/') } 
28 -def phone_media_encode(input, errors='ignore'): 
29      """ Encodes the phone media file name into local storage file name 
30      """ 
31      assert errors=='ignore' 
32      l=[] 
33      for c in input: 
34          ord_c=ord(c) 
35          if ord_c<32 or ord_c>127 or \ 
36             c in bad_chars.get(wx.Platform, ()): 
37              l+=hex(ord_c).replace('0x', escape_char) 
38          else: 
39              l+=c 
40      return (str(''.join(l)), len(input)) 
41   
42 -def phone_media_decode(input, errors='ignore'): 
43      """ Decodes local system file name to phone media file name 
44      """ 
45      assert errors=='ignore' 
46      l=[] 
47      esc_str='' 
48      for c in input: 
49          if c==escape_char: 
50              # starting the escape sequence 
51              if len(esc_str): 
52                  # current escape sequence is broken, ignore 
53                  l+=esc_str 
54              esc_str=c 
55          elif len(esc_str): 
56              # in an esc sequence 
57              esc_str+=c 
58              if len(esc_str)==3: 
59                  # got an %xx -> attempt to decode 
60                  try: 
61                      h=int(esc_str[1:], 16) 
62                      l+=chr(h) 
63                  except: 
64                      # broken esc sequence, ignore 
65                      l+=esc_str 
66                  esc_str='' 
67          else: 
68              l+=c 
69      return (''.join(l), len(input)) 
70   
71 -class Codec(codecs.Codec): 
72   
73 -    def encode(self, input,errors='strict'): 
74          return phone_media_encode(input,errors) 
75 -    def decode(self, input,errors='strict'): 
76          return phone_media_decode(input,errors) 
77   
78 -class StreamWriter(Codec,codecs.StreamWriter): 
79      pass 
80   
81 -class StreamReader(Codec,codecs.StreamReader): 
82      pass 
83   
84  ### encodings module API 
85  codec_name='phone_media' 
86 -def search_func(name): 
87      if name==codec_name: 
88          return (phone_media_encode, phone_media_decode, 
89                  StreamReader, StreamWriter) 
90