lib/wind/gen-punycode-examples.py

   1 #!/usr/local/bin/python
   2 # -*- coding: iso-8859-1 -*-
   3
   4 # $Id$
   5
   6 # Copyright (c) 2004 Kungliga Tekniska Högskolan
   7 # (Royal Institute of Technology, Stockholm, Sweden).
   8 # All rights reserved.
   9 #
  10 # Redistribution and use in source and binary forms, with or without
  11 # modification, are permitted provided that the following conditions
  12 # are met:
  13 #
  14 # 1. Redistributions of source code must retain the above copyright
  15 #    notice, this list of conditions and the following disclaimer.
  16 #
  17 # 2. Redistributions in binary form must reproduce the above copyright
  18 #    notice, this list of conditions and the following disclaimer in the
  19 #    documentation and/or other materials provided with the distribution.
  20 #
  21 # 3. Neither the name of the Institute nor the names of its contributors
  22 #    may be used to endorse or promote products derived from this software
  23 #    without specific prior written permission.
  24 #
  25 # THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  26 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  27 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  28 # ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  29 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  30 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  31 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  32 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  33 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  34 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  35 # SUCH DAMAGE.
  36
  37 import re
  38 import string
  39 import sys
  40
  41 import generate
  42
  43 if len(sys.argv) != 3:
  44     print "usage: %s rfc3492.txt" % sys.argv[0]
  45     sys.exit(1)
  46
  47 f = open(sys.argv[1], 'r')
  48
  49 examples_h = generate.Header('%s/punycode_examples.h' % sys.argv[2])
  50 examples_c = generate.Header('%s/punycode_examples.c' % sys.argv[2])
  51
  52 start = False
  53
  54 while True:
  55     l = f.readline()
  56     if not l:
  57         break
  58     if l[-2:] == "\\\n":
  59         l2 = f.readline()
  60         if not l2:
  61             raise Exception("EOF in backslash escape")
  62         l2 = re.sub('^ *', '', l2)
  63         l = l[:-2] + l2
  64     if start:
  65         if re.match('7\.2', l):
  66             start = False
  67         else:
  68             m = re.search('^ *\([A-Z]\) *(.*)$', l);
  69             if m:
  70                 desc = m.group(1)
  71                 codes = []
  72             else:
  73                 m = re.search('^ *([uU]+.*) *$', l)
  74                 if m:
  75                     codes.extend(string.split(m.group(1), ' '))
  76                 else:
  77                     m = re.search('^ *Punycode: (.*) *$', l)
  78                     if m:
  79                         cases.append([codes, m.group(1), desc])
  80     else:
  81         if re.match('^7\.1', l):
  82             start = True
  83             cases = []
  84
  85 f.close()
  86
  87 examples_h.file.write(
  88 '''
  89 #include <krb5-types.h>
  90
  91 #define MAX_LENGTH 40
  92
  93 struct punycode_example {
  94     size_t len;
  95     uint32_t val[MAX_LENGTH];
  96     const char *pc;
  97     const char *description;
  98 };
  99
 100 extern const struct punycode_example punycode_examples[];
 101
 102 extern const size_t punycode_examples_size;
 103 ''')
 104
 105 examples_c.file.write(
 106 '''
 107 #include <stdlib.h>
 108 #include "punycode_examples.h"
 109
 110 const struct punycode_example punycode_examples[] = {
 111 ''')
 112
 113 for x in cases:
 114     [cp, pc, desc] = x
 115     examples_c.file.write(
 116         "  {%u, {%s}, \"%s\", \"%s\"},\n" %
 117         (len(cp),
 118          string.join([re.sub('[uU]\+', '0x', x) for x in cp], ', '),
 119          pc,
 120          desc))
 121
 122 examples_c.file.write(
 123 '''};
 124
 125 ''')
 126
 127 examples_c.file.write(
 128     "const size_t punycode_examples_size = %u;\n\n" % len(cases))
 129
 130 examples_h.close()
 131 examples_c.close()