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      1 #!/usr/local/bin/python
      2 # -*- coding: iso-8859-1 -*-
      3 
      4 # Id
      5 
      6 # Copyright (c) 2004 Kungliga Tekniska Hgskolan
      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 sys
     39 
     40 import generate
     41 
     42 if len(sys.argv) != 3:
     43     print("usage: %s rfc3492.txt" % sys.argv[0])
     44     sys.exit(1)
     45 
     46 f = open(sys.argv[1], 'r')
     47 
     48 examples_h = generate.Header('%s/punycode_examples.h' % sys.argv[2])
     49 examples_c = generate.Header('%s/punycode_examples.c' % sys.argv[2])
     50 
     51 start = False
     52 
     53 while True:
     54     l = f.readline()
     55     if not l:
     56         break
     57     if l[-2:] == "\\\n":
     58         l2 = f.readline()
     59         if not l2:
     60             raise Exception("EOF in backslash escape")
     61         l2 = re.sub('^ *', '', l2)
     62         l = l[:-2] + l2
     63     if start:
     64         if re.match('7\.2', l):
     65             start = False
     66         else:
     67             m = re.search('^ *\([A-Z]\) *(.*)$', l);
     68             if m:
     69                 desc = m.group(1)
     70                 codes = []
     71             else:
     72                 m = re.search('^ *([uU]+.*) *$', l)
     73                 if m:
     74                     codes.extend(m.group(1).split(' '))
     75                 else:
     76                     m = re.search('^ *Punycode: (.*) *$', l)
     77                     if m:
     78                         cases.append([codes, m.group(1), desc])
     79     else:
     80         if re.match('^7\.1', l):
     81             start = True
     82             cases = []
     83 
     84 f.close()
     85 
     86 examples_h.file.write(
     87 '''
     88 #include <krb5-types.h>
     89 
     90 #define MAX_LENGTH 40
     91 
     92 struct punycode_example {
     93     size_t len;
     94     uint32_t val[MAX_LENGTH];
     95     const char *pc;
     96     const char *description;
     97 };
     98 
     99 extern const struct punycode_example punycode_examples[];
    100 
    101 extern const size_t punycode_examples_size;
    102 ''')
    103 
    104 examples_c.file.write(
    105 '''
    106 #include <stdlib.h>
    107 #include "punycode_examples.h"
    108 
    109 const struct punycode_example punycode_examples[] = {
    110 ''')
    111 
    112 for x in cases:
    113     [cp, pc, desc] = x
    114     examples_c.file.write(
    115         "  {%u, {%s}, \"%s\", \"%s\"},\n" %
    116         (len(cp),
    117          ",".join([re.sub('[uU]\+', '0x', x) for x in cp]),
    118          pc,
    119          desc))
    120 
    121 examples_c.file.write(
    122 '''};
    123 
    124 ''')
    125 
    126 examples_c.file.write(
    127     "const size_t punycode_examples_size = %u;\n\n" % len(cases))
    128 
    129 examples_h.close()
    130 examples_c.close()
    131