vim -- automatic comment, header guard, and header inclusion

gistfile1.vim

" Automatic C / C++ file headers
" (relies on automatic creation of new stars on 'o' )
function! s:insert_header()
  let filename = expand("%:t")
  execute "normal! i/* "
  execute "normal! o" . filename
  execute "normal! o"
  execute "normal! oTODO: Description "
  execute "normal! o"
  execute "normal! o/"
  normal! o
  normal! o
endfunction
autocmd BufNewFile *.{h,c,hpp,cpp} call <SID>insert_header()

" Automatic C / C++ header guards
function! s:insert_gates()
  let gatename = "__" . substitute(toupper(expand("%:t")), "\\.", "_", "g")
  execute "normal! i#ifndef " . gatename
  execute "normal! o#define " . gatename . " "
  normal! o
  execute "normal! Go#endif /* " . gatename . " */"
  normal! k
endfunction
autocmd BufNewFile *.{h,hpp} call <SID>insert_gates()

" Automatic header file inclusion (foo.c includes foo.h)
function! s:insert_header_incl()
  let filename = expand("%:t")
  execute "normal! i#include " . "\"" . substitute(filename, "\\.c", "\\.h", "g") . "\""
  normal! o
endfunction
autocmd BufNewFile *.{c,cpp} call <SID>insert_header_incl()