boustrocc.py

#!/usr/bin/python3

# This is a simple pre-processor for a boustrophedonic dialect of the C
# programming language :
# http://en.wikipedia.org/wiki/Boustrophedonic
#
# A sample program is :
# #include <stdio.h>
# { )( niam tni
#   printf("Hello dlrow\n");
#   ;)"n\world olleH"(ftnirp
#   return 0;
# }
#
# To compile, use ./boustrocc.py foobar.c, it will create a boustro executable
# in the current directory
from __future__ import with_statement
import sys
import os

if len(sys.argv) < 2:
  print('Usage %s <input file>'%(sys.argv[0]))

TMP_FILE = '/tmp/boustro_file.c'
with open(sys.argv[1]) as f, open(TMP_FILE, 'wt') as o:
  for i, l in enumerate(f):
    if i%2:
      o.write(l[::-1])
    else:
      o.write(l)

os.system('gcc -o boustro %s'%TMP_FILE)

test.c

#include <stdio.h>
{ )( niam tni
  printf("Hello dlrow\n");
  ;)"n\world olleH"(ftnirp
  return 0;
}