pyx/dvi/encfile.py

   1 from pyx import reader
   2
   3 class ENFfileError(Exception):
   4     pass
   5
   6 class ENCfile:
   7
   8     def __init__(self, filename):
   9         encfile = open(filename, "rb")
  10         c = reader.PStokenizer(encfile.read(), "")
  11         encfile.close()
  12
  13         # name of encoding
  14         self.name = c.gettoken()
  15         token = c.gettoken()
  16         if token != "[":
  17             raise ENCfileError("cannot parse encoding file '%s', expecting '[' got '%s'" % (filename, token))
  18         self.vector = []
  19         for i in range(256):
  20             token = c.gettoken()
  21             if token == "]":
  22                 raise ENCfileError("not enough charcodes in encoding file '%s'" % filename)
  23             if not token[0] == "/":
  24                 raise ENCfileError("token does not start with / in encoding file '%s'" % filename)
  25             self.vector.append(token[1:])
  26         if c.gettoken() != "]":
  27             raise ENCfileError("too many charcodes in encoding file '%s'" % filename)
  28         token = c.gettoken()
  29         if token != "def":
  30             raise ENCfileError("cannot parse encoding file '%s', expecting 'def' got '%s'" % (filename, token))
  31