Add emacs CC mode style for OpenSSL

;;; This Emacs Lisp file defines a C indentation style for OpenSSL.

;;;

;;; This definition is for the "CC mode" package, which is the default

;;; mode for editing C source files in Emacs 20, not for the older

;;; c-mode.el (which was the default in less recent releaes of Emacs 19).

;;;

;;; Recommended use is to add this line in your .emacs:

;;;

;;;   (load (expand-file-name "~/PATH/TO/openssl-c-indent.el"))

;;;

;;; To activate this indentation style, visit a C file, type

;;; M-x c-set-style <RET> (or C-c . for short), and enter "eay".

;;; To toggle the auto-newline feature of CC mode, type C-c C-a.

;;;

;;; If you're a OpenSSL developer, you might find it more comfortable

;;; to have this style be permanent in your OpenSSL development

;;; directory.  To have that, please perform this:

;;;

;;;    M-x add-dir-local-variable <RET> c-mode <RET> c-file-style <RET>

;;;    "OpenSSL-II" <RET>

;;;

;;; A new buffer with .dir-locals.el will appear.  Save it (C-x C-s).

;;;

;;; For suggesting improvements, please send e-mail to levitte@openssl.org.

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;; Note, it could be easy to inherit from the "gnu" style...  however,

;; one never knows if that style will change somewhere in the future,

;; so I've chosen to copy the "gnu" style values explicitely instead

;; and mark them with a comment.                // RLevitte 2015-08-31

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

(c-add-style "OpenSSL-II"

             '((c-basic-offset . 4)

               (indent-tabs-mode . nil)

               (fill-column . 78)

               (comment-column . 33)

               (c-comment-only-line-offset 0 . 0)            ; From "gnu" style

               (c-hanging-braces-alist                       ; From "gnu" style

                (substatement-open before after)             ; From "gnu" style

                (arglist-cont-nonempty))                     ; From "gnu" style

               (c-offsets-alist

                (statement-block-intro . +)                  ; From "gnu" style

                (knr-argdecl-intro . 0)

                (knr-argdecl . 0)

                (substatement-open . +)                      ; From "gnu" style

                (substatement-label . 0)                     ; From "gnu" style

                (label . 1)

                (statement-case-open . +)                    ; From "gnu" style

                (statement-cont . +)                         ; From "gnu" style

                (arglist-intro . c-lineup-arglist-intro-after-paren) ; From "gnu" style

                (arglist-close . c-lineup-arglist)           ; From "gnu" style

                (inline-open . 0)                            ; From "gnu" style

                (brace-list-open . +)                        ; From "gnu" style

                (topmost-intro-cont first c-lineup-topmost-intro-cont

                                    c-lineup-gnu-DEFUN-intro-cont) ; From "gnu" style

                )

               (c-special-indent-hook . c-gnu-impose-minimum) ; From "gnu" style

               (c-block-comment-prefix . "* ")

               ))