xorn/src/gaf/fileformat.py

   1 # gaf - Python library for manipulating gEDA files
   2 # Copyright (C) 1998-2010 Ales Hvezda
   3 # Copyright (C) 1998-2010 gEDA Contributors (see ChangeLog for details)
   4 # Copyright (C) 2013-2020 Roland Lutz
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program; if not, write to the Free Software Foundation,
  18 # Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19
  20 ## \namespace gaf.fileformat
  21 ## File formats.
  22
  23 import os.path
  24
  25 FORMAT_SCH, FORMAT_SYM, FORMAT_SCH_XML, FORMAT_SYM_XML = xrange(4)
  26
  27 VALID_FORMATS = {
  28     'sch': FORMAT_SCH,
  29     'sym': FORMAT_SYM,
  30     'schxml': FORMAT_SCH_XML,
  31     'symxml': FORMAT_SYM_XML
  32 }
  33
  34 ## Raised when the format of a file isn't specified and can't be
  35 ## guessed from the file name.
  36
  37 class UnknownFormatError(Exception):
  38     pass
  39
  40 def guess_format(path):
  41     basename = os.path.basename(path).lower()
  42     if basename.endswith('.sch'):
  43         return FORMAT_SCH
  44     if basename.endswith('.sym'):
  45         return FORMAT_SYM
  46     if basename.endswith('.sch.xml'):
  47         return FORMAT_SCH_XML
  48     if basename.endswith('.sym.xml'):
  49         return FORMAT_SYM_XML
  50     raise UnknownFormatError