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1#!/usr/bin/env python
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"""
10import sys
11
12def 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):
18        u = unichr(i)
19        try:
20            c1 = u.encode(encoding1)
21        except UnicodeError, reason:
22            c1 = '<undefined>'
23        try:
24            c2 = u.encode(encoding2)
25        except UnicodeError, 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 = chr(i)
34        try:
35            u1 = c.decode(encoding1)
36        except UnicodeError:
37            u1 = u'<undefined>'
38        try:
39            u2 = c.decode(encoding2)
40        except UnicodeError:
41            u2 = u'<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
52if __name__ == '__main__':
53    compare_codecs(sys.argv[1], sys.argv[2])
54