Re: Customizing C Indentation

["Rodrigo González del Cueto" <rdelcueto@gmail.com>]

I was finally able to customize the indentation to do what I wanted. I had some trouble with nested blocks. Apparently the basic-offset (2), kept accumulating within each nested block, offsetting them by more than they should.

I guess my solution is far from elegant, but it works!

I set arglist-intro and arglist-close to use my edk-c-lineup-calls function.
Here is the code:

(defun indent-edk-func-call ()
  (save-excursion
    (progn
      (re-search-forward "[a-zA-Z][a-zA-Z0-9]+ *(" (c-point 'eol) 'move)
      (if (match-string 0)
          (progn
            ;;(message "Matched:(%s), (%s), (%s)" (match-string 0) (match-string 1) (match-string 2))
            (goto-char (match-beginning 0))
            (current-column))
        nil))))

(defun edk-c-lineup-calls (langelem)
  ;; lineup stream operators
  (save-excursion
    (let* ((relpos (cdr langelem))
           (curcol (progn (goto-char relpos)
                          (current-column)))
           (indent-size (indent-edk-func-call)))
      (progn
        ;;(message "Indentation pos:(%s),(%s)" indent-size curcol)
        (if (> indent-size 0)
            (if (> curcol 2)
                (+ indent-size 2 (- curcol))
              indent-size)
          (progn
            ;;(message "+Indentation pos:(%s),(%s)" indent-size curcol)
              '+))))))

On Monday, April 13, 2015 at 5:52:49 PM UTC-5, Rodrigo González del Cueto wrote:
> Hey all,
> 
> I hope you could help me figure out how to customize Emacs to indent code in the following way.
> 
> I'm working on an EDK related project. And the EDK code standards state the following:
> 
> "Subsequent lines of multi-line function calls should line up one or two tab-
> stops from the beginning of the function name."
> 
> Example:
> 
>   Status = gRT->GetVariable(
>                   NORMAL_SETUP_NAME,
>                   &gEfiNormalSetupGuid,
>                   NULL,
>                   &VarSize,
>                   &SystemConfiguration
>                   );
> 
> So given a function call, the arglist-intro offset, should make reference to the position of the first character of the function being called, and from there, go up an indentation level.
> 
> I've read the Emacs documentation, and I only understood how to indent in relation to the previous line's indentation level. But I haven't been able to understand how to move within the previous line's content.
> 
> -Rodrigo