Lib/plat-riscos/rourl2path.py

   1 """riscos specific module for conversion between pathnames and URLs.
   2 Based on macurl2path.
   3 Do not import directly, use urllib instead."""
   4
   5 import string
   6 import urllib
   7 import os
   8
   9 def url2pathname(pathname):
  10     "Convert /-delimited pathname to mac pathname"
  11     #
  12     # XXXX The .. handling should be fixed...
  13     #
  14     tp = urllib.splittype(pathname)[0]
  15     if tp and tp <> 'file':
  16         raise RuntimeError, 'Cannot convert non-local URL to pathname'
  17     components = string.split(pathname, '/')
  18     # Remove . and embedded ..
  19     i = 0
  20     while i < len(components):
  21         if components[i] == '.':
  22             del components[i]
  23         elif components[i] == '..' and i > 0 and \
  24                                   components[i-1] not in ('', '..'):
  25             del components[i-1:i+1]
  26             i = i-1
  27         elif components[i] == '' and i > 0 and components[i-1] <> '':
  28             del components[i]
  29         else:
  30             if components[i]<>'..' and string.find(components[i], '.')<>-1 :
  31                 components[i] = string.join(string.split(components[i],'.'),'/')
  32             i = i+1
  33     if not components[0]:
  34         # Absolute unix path, don't start with colon
  35         return string.join(components[1:], '.')
  36     else:
  37         # relative unix path, start with colon. First replace
  38         # leading .. by empty strings (giving ::file)
  39         i = 0
  40         while i < len(components) and components[i] == '..':
  41             components[i] = '^'
  42             i = i + 1
  43         return string.join(components, '.')
  44
  45 def pathname2url(pathname):
  46     "convert mac pathname to /-delimited pathname"
  47     if '/' in pathname:
  48         raise RuntimeError, "Cannot convert pathname containing slashes"
  49     components = string.split(pathname, ':')
  50     # Replace empty string ('::') by .. (will result in '/../' later)
  51     for i in range(1, len(components)):
  52         if components[i] == '':
  53             components[i] = '..'
  54     # Truncate names longer than 31 bytes
  55     components = map(lambda x: x[:31], components)
  56
  57     if os.path.isabs(pathname):
  58         return '/' + string.join(components, '/')
  59     else:
  60         return string.join(components, '/')
  61
  62 def test():
  63     for url in ["index.html",
  64                 "/SCSI::SCSI4/$/Anwendung/Comm/Apps/!Fresco/Welcome",
  65                 "../index.html",
  66                 "bar/index.html",
  67                 "/foo/bar/index.html",
  68                 "/foo/bar/",
  69                 "/"]:
  70         print `url`, '->', `url2pathname(url)`
  71     for path in ["drive:",
  72                  "drive:dir:",
  73                  "drive:dir:file",
  74                  "drive:file",
  75                  "file",
  76                  ":file",
  77                  ":dir:",
  78                  ":dir:file"]:
  79         print `path`, '->', `pathname2url(path)`
  80
  81 if __name__ == '__main__':
  82     test()