#!/usr/bin/env python3

""" Compare the output of two codecs.

(c) Copyright 2005, Marc-Andre Lemburg (mal@lemburg.com).

 Licensed to PSF under a Contributor Agreement.

"""
import sys

def compare_codecs(encoding1, encoding2):

 print('Comparing encoding/decoding of %r and %r' % (encoding1, encoding2))
 mismatch = 0
 # Check encoding
 for i in range(sys.maxunicode+1):
 u = chr(i)
 try:
 c1 = u.encode(encoding1)
 except UnicodeError as reason:
 c1 = '<undefined>'
 try:
 c2 = u.encode(encoding2)
 except UnicodeError as reason:
 c2 = '<undefined>'
 if c1 != c2:
 print(' * encoding mismatch for 0x%04X: %-14r != %r' % \
 (i, c1, c2))
 mismatch += 1
 # Check decoding
 for i in range(256):
 c = bytes([i])
 try:
 u1 = c.decode(encoding1)
 except UnicodeError:
 u1 = '<undefined>'
 try:
 u2 = c.decode(encoding2)
 except UnicodeError:
 u2 = '<undefined>'
 if u1 != u2:
 print(' * decoding mismatch for 0x%04X: %-14r != %r' % \
 (i, u1, u2))
 mismatch += 1
 if mismatch:
 print()
 print('Found %i mismatches' % mismatch)
 else:
 print('-> Codecs are identical.')

if __name__ == '__main__':
 compare_codecs(sys.argv[1], sys.argv[2])