new_contents: #!/usr/bin/python
  '''
  The MIT License (MIT)
  
  Copyright (c) 2013-2014 winlin
  
  Permission is hereby granted, free of charge, to any person obtaining a copy of
  this software and associated documentation files (the "Software"), to deal in
  the Software without restriction, including without limitation the rights to
  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
  the Software, and to permit persons to whom the Software is furnished to do so,
  subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  '''
  
  #################################################################################
  # to stat the code and comments lines
  #################################################################################
  import sys
  
  def trace(msg):
      print msg
      pass
  def info(msg):
      print msg
      pass
  def verbose(msg):
      #print msg
      pass
  
  def process(f, code_file):
      info("process file success")
      (stat_code, stat_block_comments, stat_line_comments) = (0, 0, 0)
      is_block_comments = False
      is_line_comments = False
      for line in f.readlines():
          line = line.strip()
          if is_block_comments:
              if "*/" in line:
                  verbose("[block][end] %s"%line)
                  is_block_comments = False
                  is_line_comments = False
              else:
                  verbose("[block][cont] %s"%line)
              continue
          if line.startswith("/*"):
              verbose("[block][start] %s"%line)
              is_block_comments = True
              is_line_comments = False
              stat_block_comments += 1
              continue
          if line.startswith("//"):
              verbose("[line] %s"%line)
              is_block_comments = False
              is_line_comments = True
              stat_line_comments += 1
              continue
          verbose("[code] %s"%line)
          is_block_comments = False
          is_line_comments = False
          stat_code += 1
      total = stat_code + stat_block_comments + stat_line_comments
      comments = stat_block_comments + stat_line_comments
      trace("total:%s code:%s comments:%s block:%s line:%s file:%s"%(total, stat_code, comments, stat_block_comments, stat_line_comments, code_file))
      return (0, total, stat_code, comments, stat_block_comments, stat_line_comments, code_file)
  
  def do_stat(code_file):
      f = None
      try:
          f = open(code_file, "r")
          info("open file success");
          return process(f, code_file)
      finally:
          if f is not None:
              f.close()
              info("close file success")
      return (-1, 0, 0, 0, 0, 0, None)
      
  code_file = None
  if __name__ == "__main__":
      if len(sys.argv) <= 1:
          print "to stat the code and comments lines"
          print "Usage: python %s <code_file>"%(sys.argv[0])
          print "     code_file: the code(header or source) file to stat"
          print "Example:"
          print "     python %s src/core/srs_core.hpp"%(sys.argv[0])
          sys.exit(-1)
          
      code_file = sys.argv[1]
      info("stat %s"%(code_file))
      do_stat(code_file)
  
subject: add code statistic tool