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 functionname *'. * Tip: to avoid typing the functionname, 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.

• Install ctags yum install ctags
• Tell vim where to find tagsfile by command in console mode or .vimrc file :set tags=path/to/file, file2 * Create tagsfile 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.

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