1  #!/usr/bin/env python3
       2  
       3  """ Compare the output of two codecs.
       4  
       5  (c) Copyright 2005, Marc-Andre Lemburg (mal@lemburg.com).
       6  
       7      Licensed to PSF under a Contributor Agreement.
       8  
       9  """
      10  import sys
      11  
      12  def compare_codecs(encoding1, encoding2):
      13  
      14      print('Comparing encoding/decoding of   %r and   %r' % (encoding1, encoding2))
      15      mismatch = 0
      16      # Check encoding
      17      for i in range(sys.maxunicode+1):
      18          u = chr(i)
      19          try:
      20              c1 = u.encode(encoding1)
      21          except UnicodeError as reason:
      22              c1 = '<undefined>'
      23          try:
      24              c2 = u.encode(encoding2)
      25          except UnicodeError as reason:
      26              c2 = '<undefined>'
      27          if c1 != c2:
      28              print(' * encoding mismatch for 0x%04X: %-14r != %r' % \
      29                    (i, c1, c2))
      30              mismatch += 1
      31      # Check decoding
      32      for i in range(256):
      33          c = bytes([i])
      34          try:
      35              u1 = c.decode(encoding1)
      36          except UnicodeError:
      37              u1 = '<undefined>'
      38          try:
      39              u2 = c.decode(encoding2)
      40          except UnicodeError:
      41              u2 = '<undefined>'
      42          if u1 != u2:
      43              print(' * decoding mismatch for 0x%04X: %-14r != %r' % \
      44                    (i, u1, u2))
      45              mismatch += 1
      46      if mismatch:
      47          print()
      48          print('Found %i mismatches' % mismatch)
      49      else:
      50          print('-> Codecs are identical.')
      51  
      52  if __name__ == '__main__':
      53      compare_codecs(sys.argv[1], sys.argv[2])