====== Tutorial: browsing source code with vim ======
How to read source code with vim:
  * open main.c
  * see a function? 
    * place cursor at the beginning of function name and '#' to search for function definition.
    * if function is defined somewhere else:
      * open main.c in another window: ':vsplit main.c'
      * change to the new window and 'n' or 'N' to search.
      * '!grep -ri function_name *'. 
        * Tip: to avoid typing the function_name, you can double click on the function name in the previous step then use 'shift + ins'.
        * Tip: to avoid mouse click use 'ctrl + R  /' to get the last search term :)).
      * open file.c that seems to contain the definition of this function according to output of grep.
      * 'n' or 'N' to search inside this file.

====== Finding fuction definition with ctag and vim ======

 * Install ctags 
    yum install ctags
 * Tell vim where to find tags_file by command in console mode or .vimrc file
    :set tags=path/to/file, file2
 * Create tags_file
    in src_dir> pwd
    ctags -R $(pwd) -o ~/.ctags
 * Finding stuffs in vim

Find a tag:
    ta: function_name
    
Find partial name:
    ta: /^partname
    
Back to the last function:
    Ctrl + o
    
    :ts – shows the list.
    :tn – goes to the next tag in that list.
    :tp - goes to the previous tag in that list.
    :tf – goes to the function which is in the first of the list.
    :tl – goes to the function which is in the last of the list.

====== References ======
  * http://www.thegeekstuff.com/2009/04/ctags-taglist-vi-vim-editor-as-sourece-code-browser/
  * http://vim.wikia.com/wiki/Browsing_programs_with_tags