script type
utility
 
description
C/C++ header files should be guarded against multiple inclusions using preprocessor directives, e.g.:
let g:HeaderGatesAdd_suffix="_H"   is default  
1.
foo_n.h  or  FooN.h  or  foo n.h  ...
#ifndef FOO_N_H
#define FOO_N_H

#endif   /*FOO_N_H*/

if you set  let g:HeaderGatesAdd_suffix="__"
it could be   FOO_N__
2.
if add let g:insert_extern_c_flag=1 in .vimrc or _vimrc
when you create a new file name foo_h.h  it look like this:
#ifndef FOO_N_H
#define FOO_N_H

#ifdef __cplusplus
extern "C" {
#endif


#ifdef __cplusplus
}
#endif

#endif  /*FOO_N_H*/

3.
:HeaderGatesAdd
this command will change 
/**
 * @file        foo_n.h
 * @version     0.1.00
 */

void test();

to:
/**
 * @file        foo_n.h
 * @version     0.1.00
 */
#ifndef FOO_N_H
#define FOO_N_H

#ifdef __cplusplus
extern "C" {
#endif

void test();

#ifdef __cplusplus
}
#endif

#endif  /*FOO_N_H*/

4.
let g:HeaderGatesAdd_prefix="__"    
foo_n.h ---------> __FOO_N
5.
let g:HeaderGatesAdd_suffix="_SUFFIX"
foo_n.h ---------> FOO_N_SUFFIX

6.
in case of suffix and prefix both null:
let g:HeaderGatesAdd_gate_type=0 is default
aTestFile.h  ---------> A_TEST_FILE

let g:HeaderGatesAdd_gate_type=1
aTestFile.h  ---------> ATESTFILE

let g:HeaderGatesAdd_gate_type=2
aTestFile.h  --------->aTestFile

may be you have other style,  u can send email to me.

install details
1.Using [Vundle.vim](Recommend):~ 
    https://github.com/gmarik/vundle 
    After installed vundle and git. Add this line to your vimrc   
    Bundle `'tczengming/headerGatesAdd.vim'` 
    Run `:BundleInstall` to install. 
    And update them easily by `:BundleInstall!` 
2. 
   Copy the script file into to the plugin directory of Vimfiles, such as ~/.vim/plugin/

version 1.4 do not require python support 
the end please forgive my poor english