gen_upb_binary_c.py

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#!/usr/bin/python3
#
# Copyright (c) 2009-2021, Google LLC
# All rights reserved.
#
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# modification, are permitted provided that the following conditions are met:
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
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#       documentation and/or other materials provided with the distribution.
#     * Neither the name of Google LLC nor the
#       names of its contributors may be used to endorse or promote products
#       derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
import sys
import re
 
include = sys.argv[1]
msg_basename = sys.argv[2]
count = 1
 
m = re.search(r'(.*\D)(\d+)$', sys.argv[2])
if m:
  msg_basename = m.group(1)
  count = int(m.group(2))
 
print('''
#include "{include}"
 
char buf[1];
 
int main() {{
  upb_Arena *arena = upb_Arena_New();
  size_t size;
'''.format(include=include))
 
def RefMessage(name):
  print('''
  {{
    {name} *proto = {name}_parse(buf, 1, arena);
    {name}_serialize(proto, arena, &size);
  }}
  '''.format(name=name))
 
RefMessage(msg_basename)
 
for i in range(2, count + 1):
  RefMessage(msg_basename + str(i))
 
print('''
  return 0;
}''')