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"""
A tool to generate test sentences for stress test"
"""

__author__ = "taku"

import sys

def escape_string(s):
  """ escape the string with "\\xXX" format.

  We don't use encode('string_escape') because it doesn't escape ascii
  characters.

  Args:
    s: a string to be escaped

  Returns:
    an escaped string.
  """
  result = ''
  for c in s:
    hexstr = hex(ord(c))
    # because hexstr contains '0x', remove the prefix and add our prefix
    result += '\\x' + hexstr[2:]
  return result

def GenerateHeader(file):
  try:
    print "const char *kTestSentences[] = {"
    for line in open(file, "r"):
      if line.startswith('#'):
        continue
      line = line.rstrip('\r\n')
      if not line:
        continue
      print " \"%s\"," % escape_string(line)
    print "};"
  except:
    print "cannot open %s" % (file)
    sys.exit(1)

def main():
  GenerateHeader(sys.argv[1])

if __name__ == "__main__":
  main()
