#!/usr/bin/env python3

import sys
import argparse

parser = argparse.ArgumentParser()
parser.add_argument('--input', dest='input',
                    help='the input file')
parser.add_argument('--output', dest='output',
                    help='the output file')
parser.add_argument('--upper', dest='upper', action='store_true', default=False,
                    help='Convert to upper case.')

c_templ = '''int %s(void) {
    return 0;
}
'''

options = parser.parse_args(sys.argv[1:])

with open(options.input) as f:
    funcname = f.readline().strip()
if options.upper:
    funcname = funcname.upper()

with open(options.output, 'w') as f:
    f.write(c_templ % funcname)