(cl-do-arglist): Revert change of

[emacs.git] / lisp / progmodes / ada-mode.el

;; @(#) ada-mode.el --- major-mode for editing Ada source.

;; Copyright (C) 1994, 95, 97, 98, 99, 2000 Free Software Foundation, Inc.

;; Author: Rolf Ebert      <ebert@inf.enst.fr>
;;      Markus Heritsch <Markus.Heritsch@studbox.uni-stuttgart.de>
;;      Emmanuel Briot  <briot@gnat.com>
;; Maintainer: Emmanuel Briot <briot@gnat.com>
;; Ada Core Technologies's version:   $Revision: 1.38 $
;; Keywords: languages ada

;; This file is not part of GNU Emacs

;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to
;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

;;; Commentary:
;;; This mode is a major mode for editing Ada83 and Ada95 source code.
;;; This is a major rewrite of the file packaged with Emacs-20.  The
;;; ada-mode is composed of four lisp file, ada-mode.el, ada-xref.el,
;;; ada-prj.el and ada-stmt.el. Only this file (ada-mode.el) is
;;; completely independent from the GNU Ada compiler Gnat, distributed
;;; by Ada Core Technologies. All the other files rely heavily on
;;; features provides only by Gnat.
;;;
;;; Note: this mode will not work with Emacs 19. If you are on a VMS
;;; system, where the latest version of Emacs is 19.28, you will need
;;; another file, called ada-vms.el, that provides some required
;;; functions.

;;; Usage:
;;; Emacs should enter Ada mode automatically when you load an Ada file.
;;; By default, the valid extensions for Ada files are .ads, .adb or .ada
;;; If the ada-mode does not start automatically, then simply type the
;;; following command :
;;;     M-x ada-mode
;;;
;;; By default, ada-mode is configured to take full advantage of the GNAT
;;; compiler (the menus will include the cross-referencing features,...).
;;; If you are using another compiler, you might want to set the following
;;; variable in your .emacs (Note: do not set this in the ada-mode-hook, it
;;; won't work) :
;;;    (setq ada-which-compiler 'generic)
;;;
;;; This mode requires find-file.el to be present on your system.

;;; History:
;;; The first Ada mode for GNU Emacs was written by V. Broman in
;;; 1985. He based his work on the already existing Modula-2 mode.
;;; This was distributed as ada.el in versions of Emacs prior to 19.29.
;;;
;;; Lynn Slater wrote an extensive Ada mode in 1989. It consisted of
;;; several files with support for dired commands and other nice
;;; things. It is currently available from the PAL
;;; (wuarchive.wustl.edu:/languages/ada) as ada-mode-1.06a.tar.Z.
;;;
;;; The probably very first Ada mode (called electric-ada.el) was
;;; written by Steven D. Litvintchouk and Steven M. Rosen for the
;;; Gosling Emacs. L. Slater based his development on ada.el and
;;; electric-ada.el.
;;;
;;; A complete rewrite by M. Heritsch and R. Ebert has been done.
;;; Some ideas from the Ada mode mailing list have been
;;; added.  Some of the functionality of L. Slater's mode has not
;;; (yet) been recoded in this new mode.  Perhaps you prefer sticking
;;; to his version.
;;;
;;; A complete rewrite for Emacs-20 / Gnat-3.11 has been done by Ada Core
;;; Technologies. Please send bugs to  briot@gnat.com

;;; Credits:
;;;   Many thanks to John McCabe <john@assen.demon.co.uk> for sending so
;;;     many patches included in this package.
;;;   Christian Egli <Christian.Egli@hcsd.hac.com>:
;;;     ada-imenu-generic-expression
;;;   Many thanks also to the following persons that have contributed one day
;;;   to the ada-mode
;;;     Philippe Waroquiers (PW) <philippe@cfmu.eurocontrol.be> in particular,
;;;     woodruff@stc.llnl.gov (John Woodruff)
;;;     jj@ddci.dk (Jesper Joergensen)
;;;     gse@ocsystems.com (Scott Evans)
;;;     comar@gnat.com (Cyrille Comar)
;;;     stephen.leake@gsfc.nasa.gov (Stephen Leake)
;;;    and others for their valuable hints.

;;; Code:
;;; Note: Every function in this package is compiler-independent.
;;; The names start with  ada-
;;; The variables that the user can edit can all be modified through
;;;   the customize mode. They are sorted in alphabetical order in this
;;;   file.


;; this function is needed at compile time
(eval-and-compile
  (defun ada-check-emacs-version (major minor &optional is-xemacs)
    "Returns t if Emacs's version is greater or equal to MAJOR.MINOR.
If IS-XEMACS is non-nil, check for XEmacs instead of Emacs."
    (let ((xemacs-running (or (string-match "Lucid"  emacs-version)
                              (string-match "XEmacs" emacs-version))))
      (and (or (and is-xemacs xemacs-running)
               (not (or is-xemacs xemacs-running)))
           (or (> emacs-major-version major)
               (and (= emacs-major-version major)
                    (>= emacs-minor-version minor)))))))


;;  We create a constant for that, for efficiency only
;;  This should be evaluated both at compile time, only a runtime
(eval-and-compile
  (defconst ada-xemacs (and (boundp 'running-xemacs)
                            (symbol-value 'running-xemacs))
    "Return t if we are using XEmacs."))

(unless ada-xemacs
  (require 'outline))

(eval-and-compile
  (condition-case nil (require 'find-file) (error nil)))

;;  This call should not be made in the release that is done for the
;;  official FSF Emacs, since it does nothing useful for the latest version
;;  (require 'ada-support)

(defvar ada-mode-hook nil
  "*List of functions to call when Ada mode is invoked.
This hook is automatically executed after the ada-mode is
fully loaded.
This is a good place to add Ada environment specific bindings.")

(defgroup ada nil
  "Major mode for editing Ada source in Emacs."
  :group 'languages)

(defcustom ada-auto-case t
  "*Non-nil means automatically change case of preceding word while typing.
Casing is done according to `ada-case-keyword', `ada-case-identifier'
and `ada-case-attribute'."
  :type 'boolean :group 'ada)

(defcustom ada-broken-decl-indent 0
  "*Number of columns to indent a broken declaration.

An example is :
  declare
     A,
     >>>>>B : Integer;  --  from ada-broken-decl-indent"
  :type 'integer :group 'ada)

(defcustom ada-broken-indent 2
  "*Number of columns to indent the continuation of a broken line.

An example is :
   My_Var : My_Type := (Field1 =>
                        >>>>>>>>>Value);  -- from ada-broken-indent"
  :type 'integer :group 'ada)

(defcustom ada-case-attribute 'ada-capitalize-word
  "*Function to call to adjust the case of Ada attributes.
It may be `downcase-word', `upcase-word', `ada-loose-case-word',
`ada-capitalize-word' or `ada-no-auto-case'."
  :type '(choice (const downcase-word)
                 (const upcase-word)
                 (const ada-capitalize-word)
                 (const ada-loose-case-word)
                 (const ada-no-auto-case))
  :group 'ada)

(defcustom ada-case-exception-file '("~/.emacs_case_exceptions")
  "*List of special casing exceptions dictionaries for identifiers.
The first file is the one where new exceptions will be saved by Emacs
when you call `ada-create-case-exception'.

These files should contain one word per line, that gives the casing
to be used for that word in Ada files. Each line can be terminated by
a comment."
  :type '(repeat (file))
  :group 'ada)

(defcustom ada-case-keyword 'downcase-word
  "*Function to call to adjust the case of an Ada keywords.
It may be `downcase-word', `upcase-word', `ada-loose-case-word' or
`ada-capitalize-word'."
  :type '(choice (const downcase-word)
                 (const upcase-word)
                 (const ada-capitalize-word)
                 (const ada-loose-case-word)
                 (const ada-no-auto-case))
  :group 'ada)

(defcustom ada-case-identifier 'ada-loose-case-word
  "*Function to call to adjust the case of an Ada identifier.
It may be `downcase-word', `upcase-word', `ada-loose-case-word' or
`ada-capitalize-word'."
  :type '(choice (const downcase-word)
                 (const upcase-word)
                 (const ada-capitalize-word)
                 (const ada-loose-case-word)
                 (const ada-no-auto-case))
  :group 'ada)

(defcustom ada-clean-buffer-before-saving t
  "*Non-nil means remove trailing spaces and untabify the buffer before saving."
  :type 'boolean :group 'ada)

(defcustom ada-indent 3
  "*Size of Ada indentation.

An example is :
procedure Foo is
begin
>>>>>>>>>>null;  --  from ada-indent"
  :type 'integer  :group 'ada)

(defcustom ada-indent-after-return t
  "*Non-nil means automatically indent after RET or LFD."
  :type 'boolean :group 'ada)

(defcustom ada-indent-align-comments t
  "*Non-nil means align comments on previous line comments, if any.
If nil, indentation is calculated as usual.
Note that indentation is calculated only if `ada-indent-comment-as-code' is t.

For instance:
    A := 1;   --  A multi-line comment
              --  aligned if ada-indent-align-comments is t"
  :type 'boolean :group 'ada)

(defcustom ada-indent-comment-as-code t
  "*Non-nil means indent comment lines as code.
Nil means do not auto-indent comments."
  :type 'boolean :group 'ada)

(defcustom ada-indent-is-separate t
  "*Non-nil means indent 'is separate' or 'is abstract' if on a single line."
  :type 'boolean :group 'ada)

(defcustom ada-indent-record-rel-type 3
  "*Indentation for 'record' relative to 'type' or 'use'.

An example is:
   type A is
   >>>>>>>>>>>record    --  from ada-indent-record-rel-type"
  :type 'integer :group 'ada)

(defcustom ada-indent-renames ada-broken-indent
  "*Indentation for renames relative to the matching function statement.
If ada-indent-return is null or negative, the indentation is done relative to
the open parenthesis (if there is no parenthesis, ada-broken-indent is used).

An example is:
   function A (B : Integer)
       return C;      --  from ada-indent-return
   >>>renames Foo;    --  from ada-indent-renames"
  :type 'integer :group 'ada)

(defcustom ada-indent-return 0
  "*Indentation for 'return' relative to the matching 'function' statement.
If ada-indent-return is null or negative, the indentation is done relative to
the open parenthesis (if there is no parenthesis, ada-broken-indent is used).

An example is:
   function A (B : Integer)
   >>>>>return C;       --  from ada-indent-return"
  :type 'integer :group 'ada)

(defcustom ada-indent-to-open-paren t
  "*Non-nil means indent according to the innermost open parenthesis."
  :type 'boolean :group 'ada)

(defcustom ada-fill-comment-prefix "-- "
  "*Text inserted in the first columns when filling a comment paragraph.
Note: if you modify this variable, you will have to restart the ada-mode to
reread this variable."
  :type 'string :group 'ada)

(defcustom ada-fill-comment-postfix " --"
  "*Text inserted at the end of each line when filling a comment paragraph.
with `ada-fill-comment-paragraph-postfix'."
  :type 'string :group 'ada)

(defcustom ada-label-indent -4
  "*Number of columns to indent a label.

An example is:
procedure Foo is
begin
>>>>>>>>>>>>Label:  --  from ada-label-indent"
  :type 'integer :group 'ada)

(defcustom ada-language-version 'ada95
  "*Do we program in `ada83' or `ada95'?"
  :type '(choice (const ada83) (const ada95)) :group 'ada)

(defcustom ada-move-to-declaration nil
  "*Non-nil means `ada-move-to-start' moves point to the subprogram declaration,
not to 'begin'."
  :type 'boolean :group 'ada)

(defcustom ada-popup-key '[down-mouse-3]
  "*Key used for binding the contextual menu.
If nil, no contextual menu is available."
  :type '(restricted-sexp :match-alternatives (stringp vectorp))
  :group 'ada)

(defcustom ada-search-directories
  '("." "$ADA_INCLUDE_PATH" "/usr/adainclude" "/usr/local/adainclude"
    "/opt/gnu/adainclude")
  "*List of directories to search for Ada files.
See the description for the `ff-search-directories' variable.
Emacs will automatically add the paths defined in your project file, and if you
are using the GNAT compiler the output of the gnatls command to find where the
runtime really is."
  :type '(repeat (choice :tag "Directory"
                         (const :tag "default" nil)
                         (directory :format "%v")))
  :group 'ada)

(defcustom ada-stmt-end-indent 0
  "*Number of columns to indent the end of a statement on a separate line.

An example is:
   if A = B
   >>>>>>>>>>>then   --  from ada-stmt-end-indent"
  :type 'integer :group 'ada)

(defcustom ada-tab-policy 'indent-auto
  "*Control the behavior of the TAB key.
Must be one of :
`indent-rigidly' : always adds ada-indent blanks at the beginning of the line.
`indent-auto'    : use indentation functions in this file.
`always-tab'     : do indent-relative."
  :type '(choice (const indent-auto)
                 (const indent-rigidly)
                 (const always-tab))
  :group 'ada)

(defcustom ada-use-indent ada-broken-indent
  "*Indentation for the lines in a 'use' statement.

An example is:
   use Ada.Text_IO,
   >>>>>Ada.Numerics;    --  from ada-use-indent"
  :type 'integer :group 'ada)

(defcustom ada-when-indent 3
  "*Indentation for 'when' relative to 'exception' or 'case'.

An example is:
   case A is
   >>>>>>>>when B =>     --  from ada-when-indent"
  :type 'integer :group 'ada)

(defcustom ada-with-indent ada-broken-indent
  "*Indentation for the lines in a 'with' statement.

An example is:
   with Ada.Text_IO,
   >>>>>Ada.Numerics;    --  from ada-with-indent"
  :type 'integer :group 'ada)

(defcustom ada-which-compiler 'gnat
  "*Name of the compiler to use.
This will determine what features are made available through the ada-mode.
The possible choices are :
`gnat': Use Ada Core Technologies' Gnat compiler. Add some cross-referencing
    features
`generic': Use a generic compiler"
  :type '(choice (const gnat)
                 (const generic))
  :group 'ada)


;;; ---- end of user configurable variables
\f

(defvar ada-body-suffixes '(".adb")
  "List of possible suffixes for Ada body files.
The extensions should include a `.' if needed.")

(defvar ada-spec-suffixes '(".ads")
  "List of possible suffixes for Ada spec files.
The extensions should include a `.' if needed.")

(defvar ada-mode-menu (make-sparse-keymap "Ada")
  "Menu for ada-mode.")

(defvar ada-mode-map (make-sparse-keymap)
  "Local keymap used for Ada mode.")

(defvar ada-mode-abbrev-table nil
  "Local abbrev table for Ada mode.")

(defvar ada-mode-syntax-table nil
  "Syntax table to be used for editing Ada source code.")

(defvar ada-mode-symbol-syntax-table nil
  "Syntax table for Ada, where `_' is a word constituent.")

(eval-when-compile
  (defconst ada-83-string-keywords
    '("abort" "abs" "accept" "access" "all" "and" "array" "at" "begin"
      "body" "case" "constant" "declare" "delay" "delta" "digits" "do"
      "else" "elsif" "end" "entry" "exception" "exit" "for" "function"
      "generic" "goto" "if" "in" "is" "limited" "loop" "mod" "new"
      "not" "null" "of" "or" "others" "out" "package" "pragma" "private"
      "procedure" "raise" "range" "record" "rem" "renames" "return"
      "reverse" "select" "separate" "subtype" "task" "terminate" "then"
      "type" "use" "when" "while" "with" "xor")
    "List of Ada keywords.
This variable is used to define `ada-83-keywords' and `ada-95-keywords'"))

(defvar ada-ret-binding nil
  "Variable to save key binding of RET when casing is activated.")

(defvar ada-case-exception '()
  "Alist of words (entities) that have special casing.")

(defvar ada-lfd-binding nil
  "Variable to save key binding of LFD when casing is activated.")

(defvar ada-other-file-alist nil
  "Variable used by find-file to find the name of the other package.
See `ff-other-file-alist'.")

;;; ---- Below are the regexp used in this package for parsing

(defconst ada-83-keywords
  (eval-when-compile
    (concat "\\<" (regexp-opt ada-83-string-keywords t) "\\>"))
  "Regular expression for looking at Ada83 keywords.")

(defconst ada-95-keywords
  (eval-when-compile
    (concat "\\<" (regexp-opt
                   (append
                    '("abstract" "aliased" "protected" "requeue"
                      "tagged" "until")
                    ada-83-string-keywords) t) "\\>"))
  "Regular expression for looking at Ada95 keywords.")

(defvar ada-keywords ada-95-keywords
  "Regular expression for looking at Ada keywords.")

(defconst ada-ident-re
  "\\(\\sw\\|[_.]\\)+"
  "Regexp matching Ada (qualified) identifiers.")

(defvar ada-procedure-start-regexp
  "^[ \t]*\\(procedure\\|function\\|task\\)[ \t\n]+\\(\\(\\sw\\|[_.]\\)+\\)"
  "Regexp used to find Ada procedures/functions.")

(defvar ada-package-start-regexp
  "^[ \t]*\\(package\\)"
  "Regexp used to find Ada packages.")


;;; ---- regexps for indentation functions

(defvar ada-block-start-re
  (eval-when-compile
    (concat "\\<\\(" (regexp-opt '("begin" "declare" "else"
                                   "exception" "generic" "loop" "or"
                                   "private" "select" ))
            "\\|\\(\\(limited\\|abstract\\|tagged\\)[ \t\n]+\\)*record\\)\\>"))
  "Regexp for keywords starting Ada blocks.")

(defvar ada-end-stmt-re
  (eval-when-compile
    (concat "\\("
            ";"                                        "\\|"
            "=>[ \t]*$"                                "\\|"
            "^[ \t]*separate[ \t]*(\\(\\sw\\|[_.]\\)+)"  "\\|"
            "\\<" (regexp-opt '("begin" "declare" "is" "do" "else" "generic"
                                "loop" "private" "record" "select"
                                "then abort" "then") t) "\\>"  "\\|"
            "^[ \t]*" (regexp-opt '("function" "package" "procedure")
                                  t) "\\>\\(\\sw\\|[ \t_.]\\)+\\<is\\>"        "\\|"
            "^[ \t]*exception\\>"
            "\\)")                      )
  "Regexp of possible ends for a non-broken statement.
A new statement starts after these.")

(defvar ada-matching-start-re
  (eval-when-compile
    (concat "\\<"
            (regexp-opt
             '("end" "loop" "select" "begin" "case" "do"
               "if" "task" "package" "record" "protected") t)
            "\\>"))
  "Regexp used in ada-goto-matching-start.")

(defvar ada-matching-decl-start-re
  (eval-when-compile
    (concat "\\<"
            (regexp-opt
             '("is" "separate" "end" "declare" "if" "new" "begin" "generic" "when") t)
            "\\>"))
  "Regexp used in ada-goto-matching-decl-start.")

(defvar ada-loop-start-re
  "\\<\\(for\\|while\\|loop\\)\\>"
  "Regexp for the start of a loop.")

(defvar ada-subprog-start-re
  (eval-when-compile
    (concat "\\<" (regexp-opt '("accept" "entry" "function" "package" "procedure"
                                "protected" "task") t) "\\>"))
  "Regexp for the start of a subprogram.")

(defvar ada-named-block-re
  "[ \t]*\\(\\sw\\|_\\)+[ \t]*:[^=]"
  "Regexp of the name of a block or loop.")

(defvar ada-contextual-menu-on-identifier nil
  "Set to true when the right mouse button was clicked on an identifier.")

(defvar ada-contextual-menu-last-point nil
  "Position of point just before displaying the menu.
This is a list (point buffer).
Since `ada-popup-menu' moves the point where the user clicked, the region
is modified. Therefore no command from the menu knows what the user selected
before displaying the contextual menu.
To get the original region, restore the point to this position before
calling `region-end' and `region-beginning'.
Modify this variable if you want to restore the point to another position.")

(defvar ada-contextual-menu
  (if ada-xemacs
      '("Ada"
        ["Goto Declaration/Body"
         (ada-call-from-contextual-menu 'ada-point-and-xref)
         :included (and (functionp 'ada-point-and-xref)
                        ada-contextual-menu-on-identifier)]
        ["Goto Previous Reference"
         (ada-call-from-contextual-menu 'ada-xref-goto-previous-reference)
         :included (functionp 'ada-xref-goto-previous-reference)]
        ["List References" ada-find-references
         :included ada-contextual-menu-on-identifier]
        ["-" nil nil]
        ["Other File" ff-find-other-file]
        ["Goto Parent Unit" ada-goto-parent]
        )

    (let ((map (make-sparse-keymap "Ada")))
      ;; The identifier part
      (if (equal ada-which-compiler 'gnat)
          (progn
            (define-key-after map [Ref]
              '(menu-item "Goto Declaration/Body"
                          (lambda()(interactive)
                            (ada-call-from-contextual-menu
                             'ada-point-and-xref))
                          :visible
                          (and (functionp 'ada-point-and-xref)
                               ada-contextual-menu-on-identifier))
              t)
            (define-key-after map [Prev]
              '(menu-item "Goto Previous Reference"
                          (lambda()(interactive)
                            (ada-call-from-contextual-menu
                             'ada-xref-goto-previous-reference))
                          :visible
                          (functionp 'ada-xref-goto-previous-reference))
              t)
            (define-key-after map [List]
              '(menu-item "List References"
                          ada-find-references
                          :visible ada-contextual-menu-on-identifier) t)
            (define-key-after map [-] '("-" nil) t)
            ))
      (define-key-after map [Other] '("Other file" . ff-find-other-file) t)
      (define-key-after map [Parent] '("Goto Parent Unit" . ada-goto-parent)t)
      map))
  "Defines the menu to use when the user presses the right mouse button.
The variable `ada-contextual-menu-on-identifier' will be set to t before
displaying the menu if point was on an identifier."
  )

\f
;;------------------------------------------------------------------
;; Support for imenu  (see imenu.el)
;;------------------------------------------------------------------

(defconst ada-imenu-subprogram-menu-re
  "^[ \t]*\\(procedure\\|function\\)[ \t\n]+\\(\\(\\sw\\|_\\)+\\)[ \t\n]*\\([ \t\n]\\|([^)]+)\\)[ \t\n]*\\(return[ \t\n]+\\(\\sw\\|[_.]\\)+[ \t\n]*\\)?is[ \t\n]")

(defvar ada-imenu-generic-expression
  (list
   (list nil ada-imenu-subprogram-menu-re 2)
   (list "*Specs*"
         (concat
          "^[ \t]*\\(procedure\\|function\\)[ \t\n]+\\(\\(\\sw\\|_\\)+\\)"
          "\\("
          "\\([ \t\n]+\\|[ \t\n]*([^)]+)\\)";; parameter list or simple space
          "\\([ \t\n]*return[ \t\n]+\\(\\sw\\|[_.]\\)+[ \t\n]*\\)?"
          "\\)?;") 2)
   '("*Tasks*" "^[ \t]*task[ \t]+\\(\\(body\\|type\\)[ \t]+\\)?\\(\\(\\sw\\|_\\)+\\)" 3)
   '("*Type Defs*" "^[ \t]*\\(sub\\)?type[ \t]+\\(\\(\\sw\\|_\\)+\\)" 2)
   '("*Packages*" "^[ \t]*package[ \t]+\\(\\(body[ \t]+\\)?\\(\\sw\\|[_.]\\)+\\)" 1))
  "Imenu generic expression for Ada mode.
See `imenu-generic-expression'. This variable will create two submenus, one
for type and subtype definitions, the other for subprograms declarations.
The main menu will reference the bodies of the subprograms.")


\f
;;------------------------------------------------------------
;;  Support for compile.el
;;------------------------------------------------------------

(defun ada-compile-mouse-goto-error ()
  "Mouse interface for ada-compile-goto-error."
  (interactive)
  (mouse-set-point last-input-event)
  (ada-compile-goto-error (point))
  )

(defun ada-compile-goto-error (pos)
  "Replaces `compile-goto-error' from compile.el.
If POS is on a file and line location, go to this position. It adds to
compile.el the capacity to go to a reference in an error message.
For instance, on this line:
  foo.adb:61:11:  [...] in call to size declared at foo.ads:11
both file locations can be clicked on and jumped to."
  (interactive "d")
  (goto-char pos)

  (skip-chars-backward "-a-zA-Z0-9_:./\\")
  (cond
   ;;  special case: looking at a filename:line not at the beginning of a line
   ((and (not (bolp))
         (looking-at
          "\\([-_.a-zA-Z0-9]+\\):\\([0-9]+\\)\\(:\\([0-9]+\\)\\)?"))
    (let ((line (match-string 2))
          (error-pos (point-marker))
          source)
      (save-excursion
        (save-restriction
          (widen)
          ;;  Use funcall so as to prevent byte-compiler warnings
          (set-buffer (funcall (symbol-function 'compilation-find-file)
                               (point-marker) (match-string 1)
                               "./"))
          (if (stringp line)
              (goto-line (string-to-number line)))
          (setq source (point-marker))))
      (funcall (symbol-function 'compilation-goto-locus)
               (cons source error-pos))
      ))

   ;; otherwise, default behavior
   (t
    (funcall (symbol-function 'compile-goto-error)))
   )
  (recenter))

\f
;;-------------------------------------------------------------------------
;; Grammar related function
;; The functions below work with the syntax class of the characters in an Ada
;; buffer. Two syntax tables are created, depending on whether we want '_'
;; to be considered as part of a word or not.
;; Some characters may have multiple meanings depending on the context:
;;  - ' is either the beginning of a constant character or an attribute
;;  - # is either part of a based litteral or a gnatprep statement.
;;  - " starts a string, but not if inside a constant character.
;;  - ( and ) should be ignored if inside a constant character.
;; Thus their syntax property is changed automatically, and we can still use
;; the standard Emacs functions for sexp (see `ada-in-string-p')
;;
;; On Emacs, this is done through the `syntax-table' text property. The
;; modification is done automatically each time the user as typed a new
;; character. This is already done in `font-lock-mode' (in
;; `font-lock-syntactic-keywords', so we take advantage of the existing
;; mechanism. If font-lock-mode is not activated, we do it by hand in
;; `ada-after-change-function', thanks to `ada-deactivate-properties' and
;; `ada-initialize-properties'.
;;
;; on XEmacs, the `syntax-table' property does not exist and we have to use a
;; slow advice to `parse-partial-sexp' to do the same thing.
;; When executing parse-partial-sexp, we simply modify the strings before and
;; after, so that the special constants '"', '(' and ')' do not interact
;; with parse-partial-sexp.
;; Note: this code is slow and needs to be rewritten as soon as something
;; better is available on XEmacs.
;;-------------------------------------------------------------------------

(defun ada-create-syntax-table ()
  "Create the two syntax tables use in the Ada mode.
The standard table declares `_' as a symbol constituent, the second one
declares it as a word constituent."
  (interactive)
  (setq ada-mode-syntax-table (make-syntax-table))
  (set-syntax-table  ada-mode-syntax-table)

  ;; define string brackets (`%' is alternative string bracket, but
  ;; almost never used as such and throws font-lock and indentation
  ;; off the track.)
  (modify-syntax-entry ?%  "$" ada-mode-syntax-table)
  (modify-syntax-entry ?\" "\"" ada-mode-syntax-table)

  (modify-syntax-entry ?:  "." ada-mode-syntax-table)
  (modify-syntax-entry ?\; "." ada-mode-syntax-table)
  (modify-syntax-entry ?&  "." ada-mode-syntax-table)
  (modify-syntax-entry ?\|  "." ada-mode-syntax-table)
  (modify-syntax-entry ?+  "." ada-mode-syntax-table)
  (modify-syntax-entry ?*  "." ada-mode-syntax-table)
  (modify-syntax-entry ?/  "." ada-mode-syntax-table)
  (modify-syntax-entry ?=  "." ada-mode-syntax-table)
  (modify-syntax-entry ?<  "." ada-mode-syntax-table)
  (modify-syntax-entry ?>  "." ada-mode-syntax-table)
  (modify-syntax-entry ?$ "." ada-mode-syntax-table)
  (modify-syntax-entry ?\[ "." ada-mode-syntax-table)
  (modify-syntax-entry ?\] "." ada-mode-syntax-table)
  (modify-syntax-entry ?\{ "." ada-mode-syntax-table)
  (modify-syntax-entry ?\} "." ada-mode-syntax-table)
  (modify-syntax-entry ?. "." ada-mode-syntax-table)
  (modify-syntax-entry ?\\ "." ada-mode-syntax-table)
  (modify-syntax-entry ?\' "." ada-mode-syntax-table)

  ;; a single hyphen is punctuation, but a double hyphen starts a comment
  (modify-syntax-entry ?-  ". 12" ada-mode-syntax-table)

  ;; See the comment above on grammar related function for the special
  ;; setup for '#'.
  (if ada-xemacs
      (modify-syntax-entry ?#  "<" ada-mode-syntax-table)
    (modify-syntax-entry ?#  "$" ada-mode-syntax-table))

  ;; and \f and \n end a comment
  (modify-syntax-entry ?\f  ">   " ada-mode-syntax-table)
  (modify-syntax-entry ?\n  ">   " ada-mode-syntax-table)

  ;; define what belongs in Ada symbols
  (modify-syntax-entry ?_ "_" ada-mode-syntax-table)

  ;; define parentheses to match
  (modify-syntax-entry ?\( "()" ada-mode-syntax-table)
  (modify-syntax-entry ?\) ")(" ada-mode-syntax-table)

  (setq ada-mode-symbol-syntax-table (copy-syntax-table ada-mode-syntax-table))
  (modify-syntax-entry ?_ "w" ada-mode-symbol-syntax-table)
  )

;;  Support of special characters in XEmacs (see the comments at the beginning
;;  of the section on Grammar related functions).

(if ada-xemacs
    (defadvice parse-partial-sexp (around parse-partial-sexp-protect-constants)
      "Handles special character constants and gnatprep statements."
      (let (change)
        (if (< to from)
            (let ((tmp from))
              (setq from to  to tmp)))
        (save-excursion
          (goto-char from)
          (while (re-search-forward "'\\([(\")#]\\)'" to t)
            (setq change (cons (list (match-beginning 1)
                                     1
                                     (match-string 1))
                               change))
            (replace-match "'A'"))
          (goto-char from)
          (while (re-search-forward "\\(#[0-9a-fA-F]*#\\)" to t)
            (setq change (cons (list (match-beginning 1)
                                     (length (match-string 1))
                                     (match-string 1))
                               change))
            (replace-match (make-string (length (match-string 1)) ?@))))
        ad-do-it
        (save-excursion
          (while change
            (goto-char (caar change))
            (delete-char (cadar change))
            (insert (caddar change))
            (setq change (cdr change)))))))

(defun ada-deactivate-properties ()
  "Deactivate ada-mode's properties handling.
This would be a duplicate of font-lock if both are used at the same time."
  (remove-hook 'after-change-functions 'ada-after-change-function t))

(defun ada-initialize-properties ()
  "Initialize some special text properties in the whole buffer.
In particular, character constants are said to be strings, #...# are treated
as numbers instead of gnatprep comments."
  (save-excursion
    (save-restriction
      (widen)
      (goto-char (point-min))
      (while (re-search-forward "'.'" nil t)
        (add-text-properties (match-beginning 0) (match-end 0)
                             '(syntax-table ("'" . ?\"))))
      (goto-char (point-min))
      (while (re-search-forward "^[ \t]*#" nil t)
        (add-text-properties (match-beginning 0) (match-end 0)
                             '(syntax-table (11 . 10))))
      (set-buffer-modified-p nil)

      ;;  Setting this only if font-lock is not set won't work
      ;;  if the user activates or deactivates font-lock-mode,
      ;;  but will make things faster most of the time
      (make-local-hook 'after-change-functions)
      (add-hook 'after-change-functions 'ada-after-change-function nil t)
      )))

(defun ada-after-change-function (beg end old-len)
  "Called when the region between BEG and END was changed in the buffer.
OLD-LEN indicates what the length of the replaced text was."
  (let ((inhibit-point-motion-hooks t)
        (eol (point)))
    (save-excursion
      (save-match-data
        (beginning-of-line)
        (remove-text-properties (point) eol '(syntax-table nil))
        (while (re-search-forward "'.'" eol t)
          (add-text-properties (match-beginning 0) (match-end 0)
                               '(syntax-table ("'" . ?\"))))
        (beginning-of-line)
        (if (looking-at "^[ \t]*#")
            (add-text-properties (match-beginning 0) (match-end 0)
                                 '(syntax-table (11 . 10))))
        ))))

;;------------------------------------------------------------------
;;  Testing the grammatical context
;;------------------------------------------------------------------

(defsubst ada-in-comment-p (&optional parse-result)
  "Returns t if inside a comment."
  (nth 4 (or parse-result
             (parse-partial-sexp
              (save-excursion (beginning-of-line) (point)) (point)))))

(defsubst ada-in-string-p (&optional parse-result)
  "Returns t if point is inside a string.
If parse-result is non-nil, use is instead of calling parse-partial-sexp."
  (nth 3 (or parse-result
             (parse-partial-sexp
              (save-excursion (beginning-of-line) (point)) (point)))))

(defsubst ada-in-string-or-comment-p (&optional parse-result)
  "Returns t if inside a comment or string."
  (setq parse-result (or parse-result
                         (parse-partial-sexp
                          (save-excursion (beginning-of-line) (point)) (point))))
  (or (ada-in-string-p parse-result) (ada-in-comment-p parse-result)))


;;------------------------------------------------------------------
;; Contextual menus
;; The Ada-mode comes with contextual menus, bound by default to the right
;; mouse button.
;; Add items to this menu by modifying `ada-contextual-menu'. Note that the
;; variable `ada-contextual-menu-on-identifier' is set automatically to t
;; if the mouse button was pressed on an identifier.
;;------------------------------------------------------------------

(defun ada-call-from-contextual-menu (function)
  "Execute FUNCTION when called from the contextual menu.
It forces Emacs to change the cursor position."
  (interactive)
  (funcall function)
  (setq ada-contextual-menu-last-point
        (list (point) (current-buffer))))

(defun ada-popup-menu (position)
  "Pops up a contextual menu, depending on where the user clicked.
POSITION is the location the mouse was clicked on.
Sets `ada-contextual-menu-last-point' to the current position before
displaying the menu. When a function from the menu is called, the point is
where the mouse button was clicked."
  (interactive "e")

  ;;  declare this as a local variable, so that the function called
  ;;  in the contextual menu does not hide the region in
  ;;  transient-mark-mode.
  (let ((deactivate-mark nil))
    (setq ada-contextual-menu-last-point
         (list (point) (current-buffer)))
    (mouse-set-point last-input-event)

    (setq ada-contextual-menu-on-identifier
          (and (char-after)
               (or (= (char-syntax (char-after)) ?w)
                   (= (char-after) ?_))
               (not (ada-in-string-or-comment-p))
               (save-excursion (skip-syntax-forward "w")
                               (not (ada-after-keyword-p)))
               ))
    (let (choice)
      (if ada-xemacs
          (setq choice (funcall (symbol-function 'popup-menu)
                                ada-contextual-menu))
        (setq choice (x-popup-menu position ada-contextual-menu)))
      (if choice
          (funcall (lookup-key ada-contextual-menu (vector (car choice))))))
    (set-buffer (cadr ada-contextual-menu-last-point))
    (goto-char (car ada-contextual-menu-last-point))
    ))


;;------------------------------------------------------------------
;; Misc functions
;;------------------------------------------------------------------

;;;###autoload
(defun ada-add-extensions (spec body)
  "Define SPEC and BODY as being valid extensions for Ada files.
Going from body to spec with `ff-find-other-file' used these
extensions.
SPEC and BODY are two regular expressions that must match against the file
name"
  (let* ((reg (concat (regexp-quote body) "$"))
         (tmp (assoc reg ada-other-file-alist)))
    (if tmp
        (setcdr tmp (list (cons spec (cadr tmp))))
      (add-to-list 'ada-other-file-alist (list reg (list spec)))))

  (let* ((reg (concat (regexp-quote spec) "$"))
         (tmp (assoc reg ada-other-file-alist)))
    (if tmp
        (setcdr tmp (list (cons body (cadr tmp))))
      (add-to-list 'ada-other-file-alist (list reg (list body)))))

  (add-to-list 'auto-mode-alist (cons spec 'ada-mode))
  (add-to-list 'auto-mode-alist (cons body 'ada-mode))

  (add-to-list 'ada-spec-suffixes spec)
  (add-to-list 'ada-body-suffixes body)

  ;; Support for speedbar (Specifies that we want to see these files in
  ;; speedbar)
  (condition-case nil
      (progn
        (require 'speedbar)
        (funcall (symbol-function 'speedbar-add-supported-extension)
                 spec)
        (funcall (symbol-function 'speedbar-add-supported-extension)
                 body)))
  )


;;;###autoload
(defun ada-mode ()
  "Ada mode is the major mode for editing Ada code.

Bindings are as follows: (Note: 'LFD' is control-j.)

 Indent line                                          '\\[ada-tab]'
 Indent line, insert newline and indent the new line. '\\[newline-and-indent]'

 Re-format the parameter-list point is in             '\\[ada-format-paramlist]'
 Indent all lines in region                           '\\[ada-indent-region]'

 Adjust case of identifiers and keywords in region    '\\[ada-adjust-case-region]'
 Adjust case of identifiers and keywords in buffer    '\\[ada-adjust-case-buffer]'

 Fill comment paragraph, justify and append postfix   '\\[fill-paragraph]'

 Next func/proc/task '\\[ada-next-procedure]'  Previous func/proc/task '\\[ada-previous-procedure]'
 Next package        '\\[ada-next-package]'  Previous package        '\\[ada-previous-package]'

 Goto matching start of current 'end ...;'            '\\[ada-move-to-start]'
 Goto end of current block                            '\\[ada-move-to-end]'

Comments are handled using standard GNU Emacs conventions, including:
 Start a comment                                      '\\[indent-for-comment]'
 Comment region                                       '\\[comment-region]'
 Uncomment region                                     '\\[ada-uncomment-region]'
 Continue comment on next line                        '\\[indent-new-comment-line]'

If you use imenu.el:
 Display index-menu of functions & procedures         '\\[imenu]'

If you use find-file.el:
 Switch to other file (Body <-> Spec)                 '\\[ff-find-other-file]'
                                                   or '\\[ff-mouse-find-other-file]
 Switch to other file in other window                 '\\[ada-ff-other-window]'
                                                   or '\\[ff-mouse-find-other-file-other-window]
 If you use this function in a spec and no body is available, it gets created with body stubs.

If you use ada-xref.el:
 Goto declaration:          '\\[ada-point-and-xref]' on the identifier
                         or '\\[ada-goto-declaration]' with point on the identifier
 Complete identifier:       '\\[ada-complete-identifier]'."

  (interactive)
  (kill-all-local-variables)

  (set (make-local-variable 'require-final-newline) t)

  (make-local-variable 'comment-start)
  (if ada-fill-comment-prefix
      (setq comment-start ada-fill-comment-prefix)
    (setq comment-start "-- "))

  ;;  Set the paragraph delimiters so that one can select a whole block
  ;;  simply with M-h
  (set (make-local-variable 'paragraph-start) "[ \t\n\f]*$")
  (set (make-local-variable 'paragraph-separate) "[ \t\n\f]*$")

  ;; comment end must be set because it may hold a wrong value if
  ;; this buffer had been in another mode before. RE
  (set (make-local-variable 'comment-end) "")

  ;; used by autofill and indent-new-comment-line
  (set (make-local-variable 'comment-start-skip) "---*[ \t]*")

  ;; used by autofill to break a comment line and continue it on another line.
  ;; The reason we need this one is that the default behavior does not work
  ;; correctly with the definition of paragraph-start above when the comment
  ;; is right after a multi-line subprogram declaration (the comments are
  ;; aligned under the latest parameter, not under the declaration start).
  (set (make-local-variable 'comment-line-break-function)
       (lambda (&optional soft) (let ((fill-prefix nil))
                                  (indent-new-comment-line soft))))

  (set (make-local-variable 'indent-line-function)
       'ada-indent-current-function)

  (set (make-local-variable 'comment-column) 40)

  ;;  Emacs 20.3 defines a comment-padding to insert spaces between
  ;;  the comment and the text. We do not want any, this is already
  ;;  included in comment-start
  (unless ada-xemacs
    (progn
      (if (ada-check-emacs-version 20 3)
          (progn
            (set (make-local-variable 'parse-sexp-ignore-comments) t)
            (set (make-local-variable 'comment-padding) 0)))
      (set (make-local-variable 'parse-sexp-lookup-properties) t)
      ))

  (setq case-fold-search t)
  (if (boundp 'imenu-case-fold-search)
      (setq imenu-case-fold-search t))

  (set (make-local-variable 'fill-paragraph-function)
       'ada-fill-comment-paragraph)

  (set (make-local-variable 'imenu-generic-expression)
       ada-imenu-generic-expression)

  ;;  Support for compile.el
  ;;  We just substitute our own functions to go to the error.
  (add-hook 'compilation-mode-hook
            (lambda()
              (setq compile-auto-highlight 40)
              (define-key compilation-minor-mode-map [mouse-2]
                'ada-compile-mouse-goto-error)
              (define-key compilation-minor-mode-map "\C-c\C-c"
                'ada-compile-goto-error)
              (define-key compilation-minor-mode-map "\C-m"
                'ada-compile-goto-error)
              ))

  ;;  font-lock support :
  ;;  We need to set some properties for XEmacs, and define some variables
  ;;  for Emacs

  (if ada-xemacs
      ;;  XEmacs
      (put 'ada-mode 'font-lock-defaults
           '(ada-font-lock-keywords
             nil t ((?\_ . "w") (?# . ".")) beginning-of-line))
    ;;  Emacs
    (set (make-local-variable 'font-lock-defaults)
         '(ada-font-lock-keywords
           nil t
           ((?\_ . "w") (?# . "."))
           beginning-of-line
           (font-lock-syntactic-keywords . ada-font-lock-syntactic-keywords)))
    )

  ;; Set up support for find-file.el.
  (set (make-variable-buffer-local 'ff-other-file-alist)
       'ada-other-file-alist)
  (set (make-variable-buffer-local 'ff-search-directories)
       'ada-search-directories)
  (setq ff-post-load-hooks    'ada-set-point-accordingly
        ff-file-created-hooks 'ada-make-body)
  (add-hook 'ff-pre-load-hooks 'ada-which-function-are-we-in)

  ;; Some special constructs for find-file.el
  ;; We do not need to add the construction for 'with', which is in the
  ;; standard find-file.el
  (make-local-variable 'ff-special-constructs)

  ;; Go to the parent package :
  (add-to-list 'ff-special-constructs
               (cons (eval-when-compile
                       (concat "^\\(private[ \t]\\)?[ \t]*package[ \t]+"
                               "\\(body[ \t]+\\)?"
                               "\\(\\(\\sw\\|[_.]\\)+\\)\\.\\(\\sw\\|_\\)+[ \t\n]+is"))
                     (lambda ()
                       (setq fname (ff-get-file
                                    ada-search-directories
                                    (ada-make-filename-from-adaname
                                     (match-string 3))
                                    ada-spec-suffixes)))))
  ;; Another special construct for find-file.el : when in a separate clause,
  ;; go to the correct package.
  (add-to-list 'ff-special-constructs
               (cons "^separate[ \t\n]*(\\(\\(\\sw\\|[_.]\\)+\\))"
                     (lambda ()
                       (setq fname (ff-get-file
                                    ada-search-directories
                                    (ada-make-filename-from-adaname
                                     (match-string 1))
                                    ada-spec-suffixes)))))
  ;; Another special construct, that redefines the one in find-file.el. The
  ;; old one can handle only one possible type of extension for Ada files
  ;;  remove from the list the standard "with..." that is put by find-file.el,
  ;;  since it uses the old ada-spec-suffix variable
  ;; This one needs to replace the standard one defined in find-file.el (with
  ;;  Emacs <= 20.4), since that one uses the old variable ada-spec-suffix
  (let ((old-construct
         (assoc "^with[ \t]+\\([a-zA-Z0-9_\\.]+\\)" ff-special-constructs))
        (new-cdr
         (lambda ()
           (setq fname (ff-get-file
                        ada-search-directories
                        (ada-make-filename-from-adaname
                         (match-string 1))
                        ada-spec-suffixes)))))
    (if old-construct
        (setcdr old-construct new-cdr)
      (add-to-list 'ff-special-constructs
                   (cons "^with[ \t]+\\([a-zA-Z0-9_\\.]+\\)"
                         new-cdr))))

  ;;  Support for outline-minor-mode
  (set (make-local-variable 'outline-regexp)
       "\\([ \t]*\\(procedure\\|function\\|package\\|if\\|while\\|for\\|declare\\|case\\|end\\|begin\\|loop\\)\\|--\\)")
  (set (make-local-variable 'outline-level) 'ada-outline-level)

  ;;  Support for imenu : We want a sorted index
  (setq imenu-sort-function 'imenu--sort-by-name)

  ;;  Support for which-function-mode is provided in ada-support (support
  ;;  for nested subprograms)

  ;;  Set up the contextual menu
  (if ada-popup-key
      (define-key ada-mode-map ada-popup-key 'ada-popup-menu))

  ;;  Support for Abbreviations (the user still need to "M-x abbrev-mode"
  (define-abbrev-table 'ada-mode-abbrev-table ())
  (setq local-abbrev-table ada-mode-abbrev-table)

  ;;  Support for indent-new-comment-line (Especially for XEmacs)
  (setq comment-multi-line nil)
  (defconst comment-indent-function (lambda () comment-column))

  (setq major-mode 'ada-mode)
  (setq mode-name "Ada")

  (use-local-map ada-mode-map)

  (if ada-xemacs
      (funcall (symbol-function 'easy-menu-add)
               ada-mode-menu ada-mode-map))

  (set-syntax-table ada-mode-syntax-table)

  (if ada-clean-buffer-before-saving
      (progn
        ;; remove all spaces at the end of lines in the whole buffer.
        (add-hook 'local-write-file-hooks 'delete-trailing-whitespace)
        ;; convert all tabs to the correct number of spaces.
        (add-hook 'local-write-file-hooks
                  (lambda () (untabify (point-min) (point-max))))))

  (run-hooks 'ada-mode-hook)

  ;;  Run this after the hook to give the users a chance to activate
  ;;  font-lock-mode

  (unless ada-xemacs
    (progn
      (ada-initialize-properties)
      (make-local-hook 'font-lock-mode-hook)
      (add-hook 'font-lock-mode-hook 'ada-deactivate-properties nil t)))

  ;; the following has to be done after running the ada-mode-hook
  ;; because users might want to set the values of these variable
  ;; inside the hook (MH)

  (cond ((eq ada-language-version 'ada83)
         (setq ada-keywords ada-83-keywords))
        ((eq ada-language-version 'ada95)
         (setq ada-keywords ada-95-keywords)))

  (if ada-auto-case
      (ada-activate-keys-for-case)))

\f
;;-----------------------------------------------------------------
;;                      auto-casing
;; Since Ada is case-insensitive, the Ada-mode provides an extensive set of
;; functions to auto-case identifiers, keywords, ...
;; The basic rules for autocasing are defined through the variables
;; `ada-case-attribute', `ada-case-keyword' and `ada-case-identifier'. These
;; are references to the functions that will do the actual casing.
;;
;; However, in most cases, the user will want to define some exceptions to
;; these casing rules. This is done through a list of files, that contain
;; one word per line. These files are stored in `ada-case-exception-file'.
;; For backward compatibility, this variable can also be a string.
;;-----------------------------------------------------------------

(defun ada-create-case-exception (&optional word)
  "Defines WORD as an exception for the casing system.
If WORD is not given, then the current word in the buffer is used instead.
The new words is added to the first file in `ada-case-exception-file'.
The standard casing rules will no longer apply to this word."
  (interactive)
  (let ((previous-syntax-table (syntax-table))
        (exception-list '())
        file-name
        )

    (cond ((stringp ada-case-exception-file)
           (setq file-name ada-case-exception-file))
          ((listp ada-case-exception-file)
           (setq file-name (car ada-case-exception-file)))
          (t
           (error "No exception file specified")))

    (set-syntax-table ada-mode-symbol-syntax-table)
    (unless word
      (save-excursion
        (skip-syntax-backward "w")
        (setq word (buffer-substring-no-properties
                    (point) (save-excursion (forward-word 1) (point))))))

    ;;  Reread the exceptions file, in case it was modified by some other,
    ;;  and to keep the end-of-line comments that may exist in it.
    (if (file-readable-p (expand-file-name file-name))
        (let ((buffer (current-buffer)))
          (find-file (expand-file-name file-name))
          (set-syntax-table ada-mode-symbol-syntax-table)
          (widen)
          (goto-char (point-min))
          (while (not (eobp))
            (add-to-list 'exception-list
                         (list
                          (buffer-substring-no-properties
                           (point) (save-excursion (forward-word 1) (point)))
                          (buffer-substring-no-properties
                           (save-excursion (forward-word 1) (point))
                           (save-excursion (end-of-line) (point)))
                          t))
            (forward-line 1))
          (kill-buffer nil)
          (set-buffer buffer)))

    ;;  If the word is already in the list, even with a different casing
    ;;  we simply want to replace it.
    (if (and (not (equal exception-list '()))
             (assoc-ignore-case word exception-list))
        (setcar (assoc-ignore-case word exception-list)
                word)
      (add-to-list 'exception-list (list word "" t))
      )

    (if (and (not (equal ada-case-exception '()))
             (assoc-ignore-case word ada-case-exception))
        (setcar (assoc-ignore-case word ada-case-exception)
                word)
      (add-to-list 'ada-case-exception (cons word t))
      )

    ;;  Save the list in the file
    (find-file (expand-file-name file-name))
    (erase-buffer)
    (mapcar (lambda (x) (insert (car x) (nth 1 x) "\n"))
            (sort exception-list
                  (lambda(a b) (string< (car a) (car b)))))
    (save-buffer)
    (kill-buffer nil)
    (set-syntax-table previous-syntax-table)
    ))

(defun ada-case-read-exceptions-from-file (file-name)
  "Read the content of the casing exception file FILE-NAME."
  (if (file-readable-p (expand-file-name file-name))
      (let ((buffer (current-buffer)))
        (find-file (expand-file-name file-name))
        (set-syntax-table ada-mode-symbol-syntax-table)
        (widen)
        (goto-char (point-min))
        (while (not (eobp))

          ;; If the item is already in the list, even with an other casing,
          ;; do not add it again. This way, the user can easily decide which
          ;; priority should be applied to each casing exception
          (let ((word (buffer-substring-no-properties
                       (point) (save-excursion (forward-word 1) (point)))))
            (unless (assoc-ignore-case word ada-case-exception)
              (add-to-list 'ada-case-exception (cons word t))))

          (forward-line 1))
        (kill-buffer nil)
        (set-buffer buffer)))
  )

(defun ada-case-read-exceptions ()
  "Read all the casing exception files from `ada-case-exception-file'."
  (interactive)

  ;;  Reinitialize the casing exception list
  (setq ada-case-exception '())

  (cond ((stringp ada-case-exception-file)
         (ada-case-read-exceptions-from-file ada-case-exception-file))

        ((listp ada-case-exception-file)
         (mapcar 'ada-case-read-exceptions-from-file
                 ada-case-exception-file))))

(defun ada-adjust-case-identifier ()
  "Adjust case of the previous identifier.
The auto-casing is done according to the value of `ada-case-identifier' and
the exceptions defined in `ada-case-exception-file'."
  (interactive)
  (if (or (equal ada-case-exception '())
          (equal (char-after) ?_))
      (funcall ada-case-identifier -1)

    (progn
      (let ((end   (point))
            (start (save-excursion (skip-syntax-backward "w")
                                   (point)))
            match)
        ;;  If we have an exception, replace the word by the correct casing
        (if (setq match (assoc-ignore-case (buffer-substring start end)
                                           ada-case-exception))

            (progn
              (delete-region start end)
              (insert (car match)))

          ;;  Else simply re-case the word
          (funcall ada-case-identifier -1))))))

(defun ada-after-keyword-p ()
  "Returns t if cursor is after a keyword that is not an attribute."
  (save-excursion
    (forward-word -1)
    (and (not (and (char-before)
                   (or (= (char-before) ?_)
                       (= (char-before) ?'))));; unless we have a _ or '
         (looking-at (concat ada-keywords "[^_]")))))

(defun ada-adjust-case (&optional force-identifier)
  "Adjust the case of the word before the just typed character.
If FORCE-IDENTIFIER is non-nil then also adjust keyword as identifier."
  (forward-char -1)
  (if (and (> (point) 1)
           ;;  or if at the end of a character constant
           (not (and (eq (char-after) ?')
                     (eq (char-before (1- (point))) ?')))
           ;;  or if the previous character was not part of a word
           (eq (char-syntax (char-before)) ?w)
           ;;  if in a string or a comment
           (not (ada-in-string-or-comment-p))
           )
      (if (save-excursion
            (forward-word -1)
            (or (= (point) (point-min))
                (backward-char 1))
            (= (char-after) ?'))
          (funcall ada-case-attribute -1)
        (if (and
             (not force-identifier)     ; (MH)
             (ada-after-keyword-p))
            (funcall ada-case-keyword -1)
          (ada-adjust-case-identifier))))
  (forward-char 1)
  )

(defun ada-adjust-case-interactive (arg)
  "Adjust the case of the previous word, and process the character just typed.
ARG is the prefix the user entered with \C-u."
  (interactive "P")

  (if ada-auto-case
      (let ((lastk last-command-char)
            (previous-syntax-table (syntax-table)))

        (unwind-protect
            (progn
              (set-syntax-table ada-mode-symbol-syntax-table)
              (cond ((or (eq lastk ?\n)
                         (eq lastk ?\r))
                     ;; horrible kludge
                     (insert " ")
                     (ada-adjust-case)
                     ;; horrible dekludge
                     (delete-backward-char 1)
                     ;; some special keys and their bindings
                     (cond
                      ((eq lastk ?\n)
                       (funcall ada-lfd-binding))
                      ((eq lastk ?\r)
                       (funcall ada-ret-binding))))
                    ((eq lastk ?\C-i) (ada-tab))
                    ;; Else just insert the character
              ((self-insert-command (prefix-numeric-value arg))))
              ;; if there is a keyword in front of the underscore
              ;; then it should be part of an identifier (MH)
              (if (eq lastk ?_)
                  (ada-adjust-case t)
                (ada-adjust-case))
              )
          ;; Restore the syntax table
          (set-syntax-table previous-syntax-table))
        )

    ;; Else, no auto-casing
    (cond
     ((eq last-command-char ?\n)
      (funcall ada-lfd-binding))
     ((eq last-command-char ?\r)
      (funcall ada-ret-binding))
     (t
      (self-insert-command (prefix-numeric-value arg))))
    ))

(defun ada-activate-keys-for-case ()
  "Modifies the key bindings for all the keys that should readjust the casing."
  (interactive)
  ;; Save original key-bindings to allow swapping ret/lfd
  ;; when casing is activated.
  ;; The 'or ...' is there to be sure that the value will not
  ;; be changed again when Ada mode is called more than once
  (or ada-ret-binding    (setq ada-ret-binding (key-binding "\C-M")))
  (or ada-lfd-binding    (setq ada-lfd-binding (key-binding "\C-j")))

  ;; Call case modifying function after certain keys.
  (mapcar (function (lambda(key) (define-key
                                   ada-mode-map
                                   (char-to-string key)
                                   'ada-adjust-case-interactive)))
          '( ?` ?_ ?# ?% ?& ?* ?( ?) ?- ?= ?+
                ?| ?\; ?: ?' ?\" ?< ?, ?. ?> ?/ ?\n 32 ?\r )))

(defun ada-loose-case-word (&optional arg)
  "Upcase first letter and letters following `_' in the following word.
No other letter is modified.
ARG is ignored, and is there for compatibility with `capitalize-word' only."
  (interactive)
  (save-excursion
    (let ((end   (save-excursion (skip-syntax-forward  "w") (point)))
          (first t))
      (skip-syntax-backward "w")
      (while (and (or first (search-forward "_" end t))
                  (< (point) end))
        (and first
             (setq first nil))
        (insert-char (upcase (following-char)) 1)
        (delete-char 1)))))

(defun ada-no-auto-case (&optional arg)
  "Does nothing.
This function can be used for the auto-casing variables in the ada-mode, to
adapt to unusal auto-casing schemes. Since it does nothing, you can for
instance use it for `ada-case-identifier' if you don't want any special
auto-casing for identifiers, whereas keywords have to be lower-cased.
See also `ada-auto-case' to disable auto casing altogether."
  )

(defun ada-capitalize-word (&optional arg)
  "Upcase first letter and letters following '_', lower case other letters.
ARG is ignored, and is there for compatibility with `capitalize-word' only."
  (interactive)
  (let ((end   (save-excursion (skip-syntax-forward  "w") (point)))
        (begin (save-excursion (skip-syntax-backward "w") (point))))
    (modify-syntax-entry ?_ "_")
    (capitalize-region begin end)
    (modify-syntax-entry ?_ "w")))

(defun ada-adjust-case-region (from to)
  "Adjusts the case of all words in the region between FROM and TO.
Attention: This function might take very long for big regions !"
  (interactive "*r")
  (let ((begin nil)
        (end nil)
        (keywordp nil)
        (attribp nil)
        (previous-syntax-table (syntax-table)))
    (message "Adjusting case ...")
    (unwind-protect
        (save-excursion
          (set-syntax-table ada-mode-symbol-syntax-table)
          (goto-char to)
          ;;
          ;; loop: look for all identifiers, keywords, and attributes
          ;;
          (while (re-search-backward "\\<\\(\\sw+\\)\\>" from t)
            (setq end (match-end 1))
            (setq attribp
                 (and (> (point) from)
                      (save-excursion
                        (forward-char -1)
                        (setq attribp (looking-at "'.[^']")))))
            (or
             ;; do nothing if it is a string or comment
             (ada-in-string-or-comment-p)
             (progn
               ;;
               ;; get the identifier or keyword or attribute
               ;;
               (setq begin (point))
               (setq keywordp (looking-at ada-keywords))
               (goto-char end)
               ;;
               ;; casing according to user-option
               ;;
               (if attribp
                   (funcall ada-case-attribute -1)
                 (if keywordp
                     (funcall ada-case-keyword -1)
                   (ada-adjust-case-identifier)))
               (goto-char begin))))
          (message "Adjusting case ... Done"))
      (set-syntax-table previous-syntax-table))))

(defun ada-adjust-case-buffer ()
  "Adjusts the case of all words in the whole buffer.
ATTENTION: This function might take very long for big buffers !"
  (interactive "*")
  (ada-adjust-case-region (point-min) (point-max)))

\f
;;--------------------------------------------------------------
;; Format Parameter Lists
;; Some special algorithms are provided to indent the parameter lists in
;; subprogram declarations. This is done in two steps:
;;  - First parses the parameter list. The returned list has the following
;;    format:
;;     ( (<Param_Name> in? out? access? <Type_Name> <Default_Expression>)
;;       ... )
;;    This is done in `ada-scan-paramlist'.
;;  - Delete and recreate the parameter list in function
;;    `ada-insert-paramlist'.
;; Both steps are called from `ada-format-paramlist'.
;; Note: Comments inside the parameter list are lost.
;;       The syntax has to be correct, or the reformating will fail.
;;--------------------------------------------------------------

(defun ada-format-paramlist ()
  "Reformats the parameter list point is in."
  (interactive)
  (let ((begin nil)
        (end nil)
        (delend nil)
        (paramlist nil)
        (previous-syntax-table (syntax-table)))
    (unwind-protect
        (progn
          (set-syntax-table ada-mode-symbol-syntax-table)

          ;; check if really inside parameter list
          (or (ada-in-paramlist-p)
              (error "not in parameter list"))

          ;; find start of current parameter-list
          (ada-search-ignore-string-comment
           (concat ada-subprog-start-re "\\|\\<body\\>" ) t nil)
          (down-list 1)
          (backward-char 1)
          (setq begin (point))

          ;; find end of parameter-list
          (forward-sexp 1)
          (setq delend (point))
          (delete-char -1)
          (insert "\n")

          ;; find end of last parameter-declaration
          (forward-comment -1000)
          (setq end (point))

          ;; build a list of all elements of the parameter-list
          (setq paramlist (ada-scan-paramlist (1+ begin) end))

          ;; delete the original parameter-list
          (delete-region begin  delend)

          ;; insert the new parameter-list
          (goto-char begin)
          (ada-insert-paramlist paramlist))

      ;; restore syntax-table
      (set-syntax-table previous-syntax-table)
      )))

(defun ada-scan-paramlist (begin end)
  "Scan the parameter list found in between BEGIN and END.
Returns the equivalent internal parameter list."
  (let ((paramlist (list))
        (param (list))
        (notend t)
        (apos nil)
        (epos nil)
        (semipos nil)
        (match-cons nil))

    (goto-char begin)

    ;; loop until end of last parameter
    (while notend

      ;; find first character of parameter-declaration
      (ada-goto-next-non-ws)
      (setq apos (point))

      ;; find last character of parameter-declaration
      (if (setq match-cons
               (ada-search-ignore-string-comment "[ \t\n]*;" nil end t))
          (progn
            (setq epos (car match-cons))
            (setq semipos (cdr match-cons)))
        (setq epos end))

      ;; read name(s) of parameter(s)
      (goto-char apos)
      (looking-at "\\(\\(\\sw\\|[_, \t\n]\\)*\\(\\sw\\|_\\)\\)[ \t\n]*:[^=]")

      (setq param (list (match-string 1)))
      (ada-search-ignore-string-comment ":" nil epos t 'search-forward)

      ;; look for 'in'
      (setq apos (point))
      (setq param
           (append param
                   (list
                    (consp
                     (ada-search-ignore-string-comment
                      "in" nil epos t 'word-search-forward)))))

      ;; look for 'out'
      (goto-char apos)
      (setq param
           (append param
                   (list
                    (consp
                     (ada-search-ignore-string-comment
                      "out" nil epos t 'word-search-forward)))))

      ;; look for 'access'
      (goto-char apos)
      (setq param
           (append param
                   (list
                    (consp
                     (ada-search-ignore-string-comment
                      "access" nil epos t 'word-search-forward)))))

      ;; skip 'in'/'out'/'access'
      (goto-char apos)
      (ada-goto-next-non-ws)
      (while (looking-at "\\<\\(in\\|out\\|access\\)\\>")
        (forward-word 1)
        (ada-goto-next-non-ws))

      ;; read type of parameter
      ;; We accept spaces in the name, since some software like Rose
      ;; generates something like: "A : B 'Class"
      (looking-at "\\<\\(\\sw\\|[_.' \t]\\)+\\>")
      (setq param
           (append param
                   (list (match-string 0))))

      ;; read default-expression, if there is one
      (goto-char (setq apos (match-end 0)))
      (setq param
           (append param
                   (list
                    (if (setq match-cons
                             (ada-search-ignore-string-comment
                              ":=" nil epos t 'search-forward))
                        (buffer-substring (car match-cons) epos)
                      nil))))

      ;; add this parameter-declaration to the list
      (setq paramlist (append paramlist (list param)))

      ;; check if it was the last parameter
      (if (eq epos end)
          (setq notend nil)
        (goto-char semipos))
      )
    (reverse paramlist)))

(defun ada-insert-paramlist (paramlist)
  "Inserts a formatted PARAMLIST in the buffer."
  (let ((i (length paramlist))
        (parlen 0)
        (typlen 0)
        (inp nil)
        (outp nil)
        (accessp nil)
        (column nil)
        (firstcol nil))

    ;; loop until last parameter
    (while (not (zerop i))
      (setq i (1- i))

      ;; get max length of parameter-name
      (setq parlen (max parlen (length (nth 0 (nth i paramlist)))))

      ;; get max length of type-name
      (setq typlen (max typlen (length (nth 4 (nth i paramlist)))))

      ;; is there any 'in' ?
      (setq inp (or inp (nth 1 (nth i paramlist))))

      ;; is there any 'out' ?
      (setq outp (or outp (nth 2 (nth i paramlist))))

      ;; is there any 'access' ?
      (setq accessp (or accessp (nth 3 (nth i paramlist))))
      )

    ;; does paramlist already start on a separate line ?
    (if (save-excursion
          (re-search-backward "^.\\|[^ \t]" nil t)
          (looking-at "^."))
        ;; yes => re-indent it
        (progn
          (ada-indent-current)
          (save-excursion
            (if (looking-at "\\(is\\|return\\)")
                (replace-match " \\1"))))

      ;; no => insert it where we are after removing any whitespace
      (fixup-whitespace)
      (save-excursion
        (cond
         ((looking-at "[ \t]*\\(\n\\|;\\)")
          (replace-match "\\1"))
         ((looking-at "[ \t]*\\(is\\|return\\)")
          (replace-match " \\1"))))
      (insert " "))

    (insert "(")
    (ada-indent-current)

    (setq firstcol (current-column))
    (setq i (length paramlist))

    ;; loop until last parameter
    (while (not (zerop i))
      (setq i (1- i))
      (setq column firstcol)

      ;; insert parameter-name, space and colon
      (insert (nth 0 (nth i paramlist)))
      (indent-to (+ column parlen 1))
      (insert ": ")
      (setq column (current-column))

      ;; insert 'in' or space
      (if (nth 1 (nth i paramlist))
          (insert "in ")
        (if (and
             (or inp
                 accessp)
             (not (nth 3 (nth i paramlist))))
            (insert "   ")))

      ;; insert 'out' or space
      (if (nth 2 (nth i paramlist))
          (insert "out ")
        (if (and
             (or outp
                 accessp)
             (not (nth 3 (nth i paramlist))))
            (insert "    ")))

      ;; insert 'access'
      (if (nth 3 (nth i paramlist))
          (insert "access "))

      (setq column (current-column))

      ;; insert type-name and, if necessary, space and default-expression
      (insert (nth 4 (nth i paramlist)))
      (if (nth 5 (nth i paramlist))
          (progn
            (indent-to (+ column typlen 1))
            (insert (nth 5 (nth i paramlist)))))

      ;; check if it was the last parameter
      (if (zerop i)
          (insert ")")
        ;; no => insert ';' and newline and indent
        (insert ";")
        (newline)
        (indent-to firstcol))
      )

    ;; if anything follows, except semicolon, newline, is or return
    ;; put it in a new line and indent it
    (unless (looking-at "[ \t]*\\(;\\|\n\\|is\\|return\\)")
      (ada-indent-newline-indent))
    ))


\f
;;;----------------------------------------------------------------
;;  Indentation Engine
;;  All indentations are indicated as a two-element string:
;;     - position of reference in the buffer
;;     - offset to indent from this position (can also be a symbol or a list
;;       that are evaluated)
;;  Thus the total indentation for a line is the column number of the reference
;;  position plus whatever value the evaluation of the second element provides.
;;  This mechanism is used so that the ada-mode can "explain" how the
;;  indentation was calculated, by showing which variables were used.
;;
;;  The indentation itself is done in only one pass: first we try to guess in
;;  what context we are by looking at the following keyword or punctuation
;;  sign. If nothing remarkable is found, just try to guess the indentation
;;  based on previous lines.
;;
;;  The relevant functions for indentation are:
;;  - `ada-indent-region': Re-indent a region of text
;;  - `ada-justified-indent-current': Re-indent the current line and shows the
;;    calculation that were done
;;  - `ada-indent-current': Re-indent the current line
;;  - `ada-get-current-indent': Calculate the indentation for the current line,
;;    based on the context (see above).
;;  - `ada-get-indent-*': Calculate the indentation in a specific context.
;;    For efficiency, these functions do not check they are in the correct
;;    context.
;;;----------------------------------------------------------------

(defun ada-indent-region (beg end)
  "Indent the region between BEG end END."
  (interactive "*r")
  (goto-char beg)
  (let ((block-done 0)
        (lines-remaining (count-lines beg end))
        (msg (format "%%4d out of %4d lines remaining ..."
                     (count-lines beg end)))
        (endmark (copy-marker end)))
    ;; catch errors while indenting
    (while (< (point) endmark)
      (if (> block-done 39)
          (progn
            (setq lines-remaining (- lines-remaining block-done)
                  block-done     0)
            (message msg lines-remaining)))
      (if (= (char-after) ?\n) nil
        (ada-indent-current))
      (forward-line 1)
      (setq block-done      (1+ block-done)))
    (message "indenting ... done")))

(defun ada-indent-newline-indent ()
  "Indents the current line, inserts a newline and then indents the new line."
  (interactive "*")
  (ada-indent-current)
  (newline)
  (ada-indent-current))

(defun ada-indent-newline-indent-conditional ()
  "Insert a newline and indent it.
The original line is indented first if `ada-indent-after-return' is non-nil.
This function is intended to be bound to the \C-m and \C-j keys."
  (interactive "*")
  (if ada-indent-after-return (ada-indent-current))
  (newline)
  (ada-indent-current))

(defun ada-justified-indent-current ()
  "Indent the current line and explains how the calculation was done."
  (interactive)

  (let ((cur-indent (ada-indent-current)))

    (message nil)
    (if (equal (cdr cur-indent) '(0))
        (message "same indentation")
      (message (mapconcat (lambda(x)
                            (cond
                             ((symbolp x)
                              (symbol-name x))
                             ((numberp x)
                              (number-to-string x))
                             ((listp x)
                              (concat "- " (symbol-name (cadr x))))
                             ))
                          (cdr cur-indent)
                          " + ")))
    (save-excursion
      (goto-char (car cur-indent))
      (sit-for 1))))

(defun ada-batch-reformat ()
  "Re-indent and re-case all the files found on the command line.
This function should be used from the Unix/Windows command line, with a
command like:
  emacs -batch -l ada-mode -f ada-batch-reformat file1 file2 ..."

  (while command-line-args-left
    (let ((source (car command-line-args-left)))
      (message (concat "formating " source))
      (find-file source)
      (ada-indent-region (point-min) (point-max))
      (ada-adjust-case-buffer)
      (write-file source))
    (setq command-line-args-left (cdr command-line-args-left)))
  (message "Done")
  (kill-emacs 0))

(defsubst ada-goto-previous-word ()
  "Moves point to the beginning of the previous word of Ada code.
Returns the new position of point or nil if not found."
  (ada-goto-next-word t))

(defun ada-indent-current ()
  "Indent current line as Ada code.
Returns the calculation that was done, including the reference point and the
offset."
  (interactive)
  (let ((previous-syntax-table (syntax-table))
        (orgpoint (point-marker))
        cur-indent tmp-indent
        prev-indent)

    (unwind-protect
        (progn
          (set-syntax-table ada-mode-symbol-syntax-table)

          ;;  This need to be done here so that the advice is not always
          ;;  activated (this might interact badly with other modes)
          (if ada-xemacs
              (ad-activate 'parse-partial-sexp t))

          (save-excursion
            (setq cur-indent

                 ;; Not First line in the buffer ?
                 (if (save-excursion (zerop (forward-line -1)))
                     (progn
                       (back-to-indentation)
                       (ada-get-current-indent))

                   ;; first line in the buffer
                   (list (point-min) 0))))

          ;; Evaluate the list to get the column to indent to
          ;; prev-indent contains the column to indent to
          (if cur-indent
              (setq prev-indent (save-excursion (goto-char (car cur-indent))
                                                (current-column))
                    tmp-indent (cdr cur-indent))
            (setq prev-indent 0  tmp-indent '()))

          (while (not (null tmp-indent))
            (cond
             ((numberp (car tmp-indent))
              (setq prev-indent (+ prev-indent (car tmp-indent))))
             (t
              (setq prev-indent (+ prev-indent (eval (car tmp-indent)))))
             )
            (setq tmp-indent (cdr tmp-indent)))

          ;; only re-indent if indentation is different then the current
          (if (= (save-excursion (back-to-indentation) (current-column)) prev-indent)
              nil
            (beginning-of-line)
            (delete-horizontal-space)
            (indent-to prev-indent))
          ;;
          ;; restore position of point
          ;;
          (goto-char orgpoint)
          (if (< (current-column) (current-indentation))
              (back-to-indentation)))

      ;; restore syntax-table
      (set-syntax-table previous-syntax-table)
      (if ada-xemacs
          (ad-deactivate 'parse-partial-sexp))
      )

    cur-indent
    ))

(defun ada-get-current-indent ()
  "Return the indentation to use for the current line."
  (let (column
        pos
        match-cons
        result
        (orgpoint (save-excursion
                    (beginning-of-line)
                    (forward-comment -10000)
                    (forward-line 1)
                    (point))))

    (setq result
    (cond

     ;;-----------------------------
     ;; in open parenthesis, but not in parameter-list
     ;;-----------------------------

     ((and ada-indent-to-open-paren
           (not (ada-in-paramlist-p))
           (setq column (ada-in-open-paren-p)))

      ;; check if we have something like this  (Table_Component_Type =>
      ;;                                          Source_File_Record)
      (save-excursion
        (if (and (skip-chars-backward " \t")
                 (= (char-before) ?\n)
                 (not (forward-comment -10000))
                 (= (char-before) ?>))
            ;; ??? Could use a different variable
            (list column 'ada-broken-indent)
          (list column 0))))

     ;;---------------------------
     ;;   at end of buffer
     ;;---------------------------

     ((not (char-after))
      (ada-indent-on-previous-lines nil orgpoint orgpoint))

     ;;---------------------------
     ;;  starting with e
     ;;---------------------------

     ((= (char-after) ?e)
      (cond

       ;; -------  end  ------

       ((looking-at "end\\>")
        (let ((label 0)
              limit)
          (save-excursion
            (ada-goto-matching-start 1)

            ;;
            ;; found 'loop' => skip back to 'while' or 'for'
            ;;                 if 'loop' is not on a separate line
            ;; Stop the search for 'while' and 'for' when a ';' is encountered.
            ;;
            (if (save-excursion
                  (beginning-of-line)
                  (looking-at ".+\\<loop\\>"))
                (progn
                  (save-excursion
                    (setq limit (car (ada-search-ignore-string-comment ";" t))))
                  (if (save-excursion
                        (and
                         (setq match-cons
                              (ada-search-ignore-string-comment ada-loop-start-re t limit))
                         (not (looking-at "\\<loop\\>"))))
                      (progn
                        (goto-char (car match-cons))
                        (save-excursion
                          (beginning-of-line)
                          (if (looking-at ada-named-block-re)
                              (setq label (- ada-label-indent))))))))

            (list (+ (save-excursion (back-to-indentation) (point)) label) 0))))

       ;; ------  exception  ----

       ((looking-at "exception\\>")
        (save-excursion
          (ada-goto-matching-start 1)
          (list (save-excursion (back-to-indentation) (point)) 0)))

       ;; else

       ((looking-at "else\\>")
        (if (save-excursion  (ada-goto-previous-word)
                             (looking-at "\\<or\\>"))
            (ada-indent-on-previous-lines nil orgpoint orgpoint)
          (save-excursion
            (ada-goto-matching-start 1 nil t)
            (list (progn (back-to-indentation) (point)) 0))))

       ;; elsif

       ((looking-at "elsif\\>")
        (save-excursion
          (ada-goto-matching-start 1 nil t)
          (list (progn (back-to-indentation) (point)) 0)))

       ))

     ;;---------------------------
     ;;  starting with w (when)
     ;;---------------------------

     ((and (= (char-after) ?w)
           (looking-at "when\\>"))
      (save-excursion
        (ada-goto-matching-start 1)
        (list (save-excursion (back-to-indentation) (point))
              'ada-when-indent)))

     ;;---------------------------
     ;;   starting with t (then)
     ;;---------------------------

     ((and (= (char-after) ?t)
           (looking-at "then\\>"))
      (if (save-excursion (ada-goto-previous-word)
                          (looking-at "and\\>"))
          (ada-indent-on-previous-lines nil orgpoint orgpoint)
        (save-excursion
          ;;  Select has been added for the statement: "select ... then abort"
          (ada-search-ignore-string-comment
           "\\<\\(elsif\\|if\\|select\\)\\>" t nil)
          (list (progn (back-to-indentation) (point))
                'ada-stmt-end-indent))))

     ;;---------------------------
     ;;   starting with l (loop)
     ;;---------------------------

     ((and (= (char-after) ?l)
           (looking-at "loop\\>"))
      (setq pos (point))
      (save-excursion
        (goto-char (match-end 0))
        (ada-goto-stmt-start)
        (if (looking-at "\\<\\(loop\\|if\\)\\>")
            (ada-indent-on-previous-lines nil orgpoint orgpoint)
          (unless (looking-at ada-loop-start-re)
            (ada-search-ignore-string-comment ada-loop-start-re
                                              nil pos))
          (if (looking-at "\\<loop\\>")
              (ada-indent-on-previous-lines nil orgpoint orgpoint)
            (list (progn (back-to-indentation) (point)) 'ada-stmt-end-indent)))))

     ;;---------------------------
     ;;   starting with b (begin)
     ;;---------------------------

     ((and (= (char-after) ?b)
           (looking-at "begin\\>"))
      (save-excursion
        (if (ada-goto-matching-decl-start t)
            (list (progn (back-to-indentation) (point)) 0)
          (ada-indent-on-previous-lines nil orgpoint orgpoint))))

     ;;---------------------------
     ;;   starting with i (is)
     ;;---------------------------

     ((and (= (char-after) ?i)
           (looking-at "is\\>"))

      (if (and ada-indent-is-separate
               (save-excursion
                 (goto-char (match-end 0))
                 (ada-goto-next-non-ws (save-excursion (end-of-line)
                                                       (point)))
                 (looking-at "\\<abstract\\>\\|\\<separate\\>")))
          (save-excursion
            (ada-goto-stmt-start)
            (list (progn (back-to-indentation) (point)) 'ada-indent))
        (save-excursion
          (ada-goto-stmt-start)
          (list (progn (back-to-indentation) (point)) 'ada-stmt-end-indent))))

     ;;---------------------------
     ;;  starting with r (record, return, renames)
     ;;---------------------------

     ((= (char-after) ?r)

      (cond

       ;; ----- record ------

       ((looking-at "record\\>")
        (save-excursion
          (ada-search-ignore-string-comment
           "\\<\\(type\\|use\\)\\>" t nil)
          (if (looking-at "\\<use\\>")
              (ada-search-ignore-string-comment "for" t nil nil 'word-search-backward))
          (list (progn (back-to-indentation) (point)) 'ada-indent-record-rel-type)))

       ;; ----- return or renames ------

       ((looking-at "re\\(turn\\|names\\)\\>")
        (save-excursion
          (let ((var 'ada-indent-return))
            ;;  If looking at a renames, skip the 'return' statement too
            (if (looking-at "renames")
                (let (pos)
                  (save-excursion
                    (setq pos (ada-search-ignore-string-comment ";\\|return\\>" t)))
                  (if (and pos
                           (= (char-after (car pos)) ?r))
                      (goto-char (car pos)))
                  (setq var 'ada-indent-renames)))

            (forward-comment -1000)
            (if (= (char-before) ?\))
                (forward-sexp -1)
              (forward-word -1))

            ;; If there is a parameter list, and we have a function declaration
            ;; or a access to subprogram declaration
            (let ((num-back 1))
              (if (and (= (char-after) ?\()
                       (save-excursion
                         (or (progn
                               (backward-word 1)
                               (looking-at "function\\>"))
                             (progn
                               (backward-word 1)
                               (setq num-back 2)
                               (looking-at "function\\>")))))

                  ;; The indentation depends of the value of ada-indent-return
                  (if (<= (eval var) 0)
                      (list (point) (list '- var))
                    (list (progn (backward-word num-back) (point))
                          var))

                ;; Else there is no parameter list, but we have a function
                ;; Only do something special if the user want to indent
                ;; relative to the "function" keyword
                (if (and (> (eval var) 0)
                         (save-excursion (forward-word -1)
                                         (looking-at "function\\>")))
                    (list (progn (forward-word -1) (point)) var)

                  ;; Else...
                  (ada-indent-on-previous-lines nil orgpoint orgpoint)))))))
       ))

     ;;--------------------------------
     ;;   starting with 'o' or 'p'
     ;;   'or'      as statement-start
     ;;   'private' as statement-start
     ;;--------------------------------

     ((and (or (= (char-after) ?o)
               (= (char-after) ?p))
           (or (ada-looking-at-semi-or)
               (ada-looking-at-semi-private)))
      (save-excursion
        (ada-goto-matching-start 1)
        (list (progn (back-to-indentation) (point)) 0)))

     ;;--------------------------------
     ;;   starting with 'd'  (do)
     ;;--------------------------------

     ((and (= (char-after) ?d)
           (looking-at "do\\>"))
      (save-excursion
        (ada-goto-stmt-start)
        (list (progn (back-to-indentation) (point)) 'ada-stmt-end-indent)))

     ;;--------------------------------
     ;;   starting with '-'  (comment)
     ;;--------------------------------

     ((= (char-after) ?-)
      (if ada-indent-comment-as-code

          ;;  Indent comments on previous line comments if required
          ;;  We must use a search-forward (even if the code is more complex),
          ;;  since we want to find the beginning of the comment.
          (let (pos)

            (if (and ada-indent-align-comments
                     (save-excursion
                       (forward-line -1)
                       (beginning-of-line)
                       (while (and (not pos)
                                   (search-forward "--"
                                                    (save-excursion
                                                      (end-of-line) (point))
                                                    t))
                         (unless (ada-in-string-p)
                           (setq pos (point))))
                       pos))
                (list (- pos 2) 0)

            ;;  Else always on previous line
            (ada-indent-on-previous-lines nil orgpoint orgpoint)))

        ;; Else same indentation as the previous line
        (list (save-excursion (back-to-indentation) (point)) 0)))

     ;;--------------------------------
     ;;   starting with '#'  (preprocessor line)
     ;;--------------------------------

     ((and (= (char-after) ?#)
           (equal ada-which-compiler 'gnat)
           (looking-at "#[ \t]*\\(if\\|els\\(e\\|if\\)\\|end[ \t]*if\\)"))
      (list (save-excursion (beginning-of-line) (point)) 0))

     ;;--------------------------------
     ;;   starting with ')' (end of a parameter list)
     ;;--------------------------------

     ((and (not (eobp)) (= (char-after) ?\)))
      (save-excursion
        (forward-char 1)
        (backward-sexp 1)
        (list (point) 0)))

     ;;---------------------------------
     ;; new/abstract/separate
     ;;---------------------------------

     ((looking-at "\\(new\\|abstract\\|separate\\)\\>")
      (ada-indent-on-previous-lines nil orgpoint orgpoint))

     ;;---------------------------------
     ;; package/function/procedure
     ;;---------------------------------

     ((and (or (= (char-after) ?p) (= (char-after) ?f))
           (looking-at "\\<\\(package\\|function\\|procedure\\)\\>"))
      (save-excursion
        ;;  Go up until we find either a generic section, or the end of the
        ;;  previous subprogram/package
        (let (found)
          (while (and (not found)
                      (ada-search-ignore-string-comment
             "\\<\\(generic\\|end\\|begin\\|package\\|procedure\\|function\\)\\>" t))

            ;;  avoid "with procedure"... in generic parts
            (save-excursion
              (forward-word -1)
              (setq found (not (looking-at "with"))))))

        (if (looking-at "generic")
            (list (progn (back-to-indentation) (point)) 0)
          (ada-indent-on-previous-lines nil orgpoint orgpoint))))

     ;;---------------------------------
     ;; label
     ;;---------------------------------

     ((looking-at "\\(\\sw\\|_\\)+[ \t\n]*:[^=]")
      (if (ada-in-decl-p)
          (ada-indent-on-previous-lines nil orgpoint orgpoint)
        (append (ada-indent-on-previous-lines nil orgpoint orgpoint)
                '(ada-label-indent))))

     ))

    ;;---------------------------------
    ;; Other syntaxes
    ;;---------------------------------
    (or result (ada-indent-on-previous-lines nil orgpoint orgpoint))))

(defun ada-indent-on-previous-lines (&optional nomove orgpoint initial-pos)
  "Calculate the indentation for the new line after ORGPOINT.
The result list is based on the previous lines in the buffer.
If NOMOVE is nil, moves point to the beginning of the current statement.
if INITIAL-POS is non-nil, moves point to INITIAL-POS before calculation."
  (if initial-pos
      (goto-char initial-pos))
  (let ((oldpoint (point)))

    ;; Is inside a parameter-list ?
    (if (ada-in-paramlist-p)
        (ada-get-indent-paramlist)

      ;; move to beginning of current statement
      (unless nomove
        (ada-goto-stmt-start))

      ;; no beginning found => don't change indentation
      (if (and (eq oldpoint (point))
               (not nomove))
          (ada-get-indent-nochange)

        (cond
         ;;
         ((and
           ada-indent-to-open-paren
           (ada-in-open-paren-p))
          (ada-get-indent-open-paren))
         ;;
         ((looking-at "end\\>")
          (ada-get-indent-end orgpoint))
         ;;
         ((looking-at ada-loop-start-re)
          (ada-get-indent-loop orgpoint))
         ;;
         ((looking-at ada-subprog-start-re)
          (ada-get-indent-subprog orgpoint))
         ;;
         ((looking-at ada-block-start-re)
          (ada-get-indent-block-start orgpoint))
         ;;
         ((looking-at "\\(sub\\)?type\\>")
          (ada-get-indent-type orgpoint))
         ;;
         ;; "then" has to be included in the case of "select...then abort"
         ;; statements, since (goto-stmt-start) at the beginning of
         ;; the current function would leave the cursor on that position
         ((looking-at "\\(\\(els\\)?if\\>\\)\\|then abort\\\>")
          (ada-get-indent-if orgpoint))
         ;;
         ((looking-at "case\\>")
          (ada-get-indent-case orgpoint))
         ;;
         ((looking-at "when\\>")
          (ada-get-indent-when orgpoint))
         ;;
         ((looking-at "\\(\\sw\\|_\\)+[ \t\n]*:[^=]")
          (ada-get-indent-label orgpoint))
         ;;
         ((looking-at "separate\\>")
          (ada-get-indent-nochange))
         ;;
         ((looking-at "with\\>\\|use\\>")
          ;;  Are we still in that statement, or are we in fact looking at
          ;;  the previous one ?
          (if (save-excursion (search-forward ";" oldpoint t))
              (list (progn (back-to-indentation) (point)) 0)
            (list (point) (if (looking-at "with")
                              'ada-with-indent
                            'ada-use-indent))))
         ;;
         (t
          (ada-get-indent-noindent orgpoint)))))
    ))

(defun ada-get-indent-open-paren ()
  "Calculates the indentation when point is behind an unclosed parenthesis."
  (list (ada-in-open-paren-p) 0))

(defun ada-get-indent-nochange ()
  "Return the current indentation of the previous line."
  (save-excursion
    (forward-line -1)
    (back-to-indentation)
    (list (point) 0)))

(defun ada-get-indent-paramlist ()
  "Calculates the indentation when point is inside a parameter list."
  (save-excursion
    (ada-search-ignore-string-comment "[^ \t\n]" t nil t)
    (cond
     ;; in front of the first parameter
     ((= (char-after) ?\()
      (goto-char (match-end 0))
      (list (point) 0))

     ;; in front of another parameter
     ((= (char-after) ?\;)
      (goto-char (cdr (ada-search-ignore-string-comment "(\\|;" t nil t)))
      (ada-goto-next-non-ws)
      (list (point) 0))

     ;; inside a parameter declaration
     (t
      (goto-char (cdr (ada-search-ignore-string-comment "(\\|;" t nil t)))
      (ada-goto-next-non-ws)
      (list (point) 'ada-broken-indent)))))

(defun ada-get-indent-end (orgpoint)
  "Calculates the indentation when point is just before an end_statement.
ORGPOINT is the limit position used in the calculation."
  (let ((defun-name nil)
        (indent nil))

    ;; is the line already terminated by ';' ?
    (if (save-excursion
          (ada-search-ignore-string-comment ";" nil orgpoint nil
                                            'search-forward))

        ;; yes, look what's following 'end'
        (progn
          (forward-word 1)
          (ada-goto-next-non-ws)
          (cond
           ((looking-at "\\<\\(loop\\|select\\|if\\|case\\)\\>")
            (save-excursion (ada-check-matching-start (match-string 0)))
            (list (save-excursion (back-to-indentation) (point)) 0))

           ;;
           ;; loop/select/if/case/record/select
           ;;
           ((looking-at "\\<record\\>")
            (save-excursion
              (ada-check-matching-start (match-string 0))
              ;;  we are now looking at the matching "record" statement
              (forward-word 1)
              (ada-goto-stmt-start)
              ;;  now on the matching type declaration, or use clause
              (unless (looking-at "\\(for\\|type\\)\\>")
                (ada-search-ignore-string-comment "\\<type\\>" t))
              (list (progn (back-to-indentation) (point)) 0)))
           ;;
           ;; a named block end
           ;;
           ((looking-at ada-ident-re)
            (setq defun-name (match-string 0))
            (save-excursion
              (ada-goto-matching-start 0)
              (ada-check-defun-name defun-name))
            (list (progn (back-to-indentation) (point)) 0))
           ;;
           ;; a block-end without name
           ;;
           ((= (char-after) ?\;)
            (save-excursion
              (ada-goto-matching-start 0)
              (if (looking-at "\\<begin\\>")
                  (progn
                    (setq indent (list (point) 0))
                    (if (ada-goto-matching-decl-start t)
                        (list (progn (back-to-indentation) (point)) 0)
                      indent)))))
           ;;
           ;; anything else - should maybe signal an error ?
           ;;
           (t
            (list (save-excursion (back-to-indentation) (point))
                  'ada-broken-indent))))

      (list (save-excursion (back-to-indentation) (point))
            'ada-broken-indent))))

(defun ada-get-indent-case (orgpoint)
  "Calculates the indentation when point is just before a case statement.
ORGPOINT is the limit position used in the calculation."
  (let ((match-cons nil)
        (opos (point)))
    (cond
     ;;
     ;; case..is..when..=>
     ;;
     ((save-excursion
        (setq match-cons (and
                          ;; the `=>' must be after the keyword `is'.
                          (ada-search-ignore-string-comment
                           "is" nil orgpoint nil 'word-search-forward)
                          (ada-search-ignore-string-comment
                           "[ \t\n]+=>" nil orgpoint))))
      (save-excursion
        (goto-char (car match-cons))
        (unless (ada-search-ignore-string-comment "when" t opos)
          (error "missing 'when' between 'case' and '=>'"))
        (list (save-excursion (back-to-indentation) (point)) 'ada-indent)))
     ;;
     ;; case..is..when
     ;;
     ((save-excursion
        (setq match-cons (ada-search-ignore-string-comment
                          "when" nil orgpoint nil 'word-search-forward)))
      (goto-char (cdr match-cons))
      (list (save-excursion (back-to-indentation) (point)) 'ada-broken-indent))
     ;;
     ;; case..is
     ;;
     ((save-excursion
        (setq match-cons (ada-search-ignore-string-comment
                          "is" nil orgpoint nil 'word-search-forward)))
      (list (save-excursion (back-to-indentation) (point)) 'ada-when-indent))
     ;;
     ;; incomplete case
     ;;
     (t
      (list (save-excursion (back-to-indentation) (point))
            'ada-broken-indent)))))

(defun ada-get-indent-when (orgpoint)
  "Calculates the indentation when point is just before a when statement.
ORGPOINT is the limit position used in the calculation."
  (let ((cur-indent (save-excursion (back-to-indentation) (point))))
    (if (ada-search-ignore-string-comment "[ \t\n]*=>" nil orgpoint)
        (list cur-indent 'ada-indent)
      (list cur-indent 'ada-broken-indent))))

(defun ada-get-indent-if (orgpoint)
  "Calculates the indentation when point is just before an if statement.
ORGPOINT is the limit position used in the calculation."
  (let ((cur-indent (save-excursion (back-to-indentation) (point)))
        (match-cons nil))
    ;;
    ;; Move to the correct then (ignore all "and then")
    ;;
    (while (and (setq match-cons (ada-search-ignore-string-comment
                                  "\\<\\(then\\|and[ \t]*then\\)\\>"
                                  nil orgpoint))
                (= (char-after (car match-cons)) ?a)))
    ;; If "then" was found (we are looking at it)
    (if match-cons
        (progn
          ;;
          ;; 'then' first in separate line ?
          ;; => indent according to 'then',
          ;; => else indent according to 'if'
          ;;
          (if (save-excursion
                (back-to-indentation)
                (looking-at "\\<then\\>"))
              (setq cur-indent (save-excursion (back-to-indentation) (point))))
          ;; skip 'then'
          (forward-word 1)
          (list cur-indent 'ada-indent))

      (list cur-indent 'ada-broken-indent))))

(defun ada-get-indent-block-start (orgpoint)
  "Calculates the indentation when point is at the start of a block.
ORGPOINT is the limit position used in the calculation."
  (let ((pos nil))
    (cond
     ((save-excursion
        (forward-word 1)
        (setq pos (ada-goto-next-non-ws orgpoint)))
      (goto-char pos)
      (save-excursion
        (ada-indent-on-previous-lines t orgpoint)))

     ;; nothing follows the block-start
     (t
      (list (save-excursion (back-to-indentation) (point)) 'ada-indent)))))

(defun ada-get-indent-subprog (orgpoint)
  "Calculates the indentation when point is just before a subprogram.
ORGPOINT is the limit position used in the calculation."
  (let ((match-cons nil)
        (cur-indent (save-excursion (back-to-indentation) (point)))
        (foundis nil))
    ;;
    ;; is there an 'is' in front of point ?
    ;;
    (if (save-excursion
          (setq match-cons
               (ada-search-ignore-string-comment
                "\\<\\(is\\|do\\)\\>" nil orgpoint)))
        ;;
        ;; yes, then skip to its end
        ;;
        (progn
          (setq foundis t)
          (goto-char (cdr match-cons)))
      ;;
      ;; no, then goto next non-ws, if there is one in front of point
      ;;
      (progn
        (unless (ada-goto-next-non-ws orgpoint)
          (goto-char orgpoint))))

    (cond
     ;;
     ;; nothing follows 'is'
     ;;
     ((and
       foundis
       (save-excursion
         (not (ada-search-ignore-string-comment
               "[^ \t\n]" nil orgpoint t))))
      (list cur-indent 'ada-indent))
     ;;
     ;; is abstract/separate/new ...
     ;;
     ((and
       foundis
       (save-excursion
         (setq match-cons
              (ada-search-ignore-string-comment
               "\\<\\(separate\\|new\\|abstract\\)\\>"
               nil orgpoint))))
      (goto-char (car match-cons))
      (ada-search-ignore-string-comment ada-subprog-start-re t)
      (ada-get-indent-noindent orgpoint))
     ;;
     ;; something follows 'is'
     ;;
     ((and
       foundis
       (save-excursion (setq match-cons (ada-goto-next-non-ws orgpoint)))
       (goto-char match-cons)
       (ada-indent-on-previous-lines t orgpoint)))
     ;;
     ;; no 'is' but ';'
     ;;
     ((save-excursion
        (ada-search-ignore-string-comment ";" nil orgpoint nil 'search-forward))
      (list cur-indent 0))
     ;;
     ;; no 'is' or ';'
     ;;
     (t
      (list cur-indent 'ada-broken-indent)))))

(defun ada-get-indent-noindent (orgpoint)
  "Calculates the indentation when point is just before a 'noindent stmt'.
ORGPOINT is the limit position used in the calculation."
  (let ((label 0))
    (save-excursion
      (beginning-of-line)

      (cond

       ;;  This one is called when indenting a line preceded by a multi-line
       ;;  subprogram declaration (in that case, we are at this point inside
       ;;  the parameter declaration list)
       ((ada-in-paramlist-p)
        (ada-previous-procedure)
        (list (save-excursion (back-to-indentation) (point)) 0))

       ;;  This one is called when indenting the second line of a multi-line
       ;;  declaration section, in a declare block or a record declaration
       ((looking-at "[ \t]*\\(\\sw\\|_\\)*[ \t]*,[ \t]*$")
        (list (save-excursion (back-to-indentation) (point))
              'ada-broken-decl-indent))

       ;;  This one is called in every over case when indenting a line at the
       ;;  top level
       (t
        (if (looking-at ada-named-block-re)
            (setq label (- ada-label-indent))

          (let (p)

            ;;  "with private" or "null record" cases
            (if (or (save-excursion
                      (and (ada-search-ignore-string-comment "\\<private\\>" nil orgpoint)
                           (setq p (point))
                           (save-excursion (forward-char -7);; skip back "private"
                                           (ada-goto-previous-word)
                                           (looking-at "with"))))
                    (save-excursion
                      (and (ada-search-ignore-string-comment "\\<record\\>" nil orgpoint)
                           (setq p (point))
                           (save-excursion (forward-char -6);; skip back "record"
                                           (ada-goto-previous-word)
                                           (looking-at "null")))))
                (progn
                  (goto-char p)
                  (re-search-backward "\\<\\(type\\|subtype\\)\\>" nil t)
                  (list (save-excursion (back-to-indentation) (point)) 0)))))
        (if (save-excursion
              (ada-search-ignore-string-comment ";" nil orgpoint nil
                                                'search-forward))
            (list (+ (save-excursion (back-to-indentation) (point)) label) 0)
          (list (+ (save-excursion (back-to-indentation) (point)) label)
                'ada-broken-indent)))))))

(defun ada-get-indent-label (orgpoint)
  "Calculates the indentation when before a label or variable declaration.
ORGPOINT is the limit position used in the calculation."
  (let ((match-cons nil)
        (cur-indent (save-excursion (back-to-indentation) (point))))
    (ada-search-ignore-string-comment ":" nil)
    (cond
     ;; loop label
     ((save-excursion
        (setq match-cons (ada-search-ignore-string-comment
                          ada-loop-start-re nil orgpoint)))
      (goto-char (car match-cons))
      (ada-get-indent-loop orgpoint))

     ;; declare label
     ((save-excursion
        (setq match-cons (ada-search-ignore-string-comment
                          "\\<declare\\|begin\\>" nil orgpoint)))
      (goto-char (car match-cons))
      (list (save-excursion (back-to-indentation) (point)) 'ada-indent))

     ;; variable declaration
     ((ada-in-decl-p)
      (if (save-excursion
            (ada-search-ignore-string-comment ";" nil orgpoint))
          (list cur-indent 0)
        (list cur-indent 'ada-broken-indent)))

     ;; nothing follows colon
     (t
      (list cur-indent '(- ada-label-indent))))))

(defun ada-get-indent-loop (orgpoint)
  "Calculates the indentation when just before a loop or a for ... use.
ORGPOINT is the limit position used in the calculation."
  (let ((match-cons nil)
        (pos (point))

        ;; If looking at a named block, skip the label
        (label (save-excursion
                 (beginning-of-line)
                 (if (looking-at ada-named-block-re)
                     (- ada-label-indent)
                   0))))

    (cond

     ;;
     ;; statement complete
     ;;
     ((save-excursion
        (ada-search-ignore-string-comment ";" nil orgpoint nil
                                          'search-forward))
      (list (+ (save-excursion (back-to-indentation) (point)) label) 0))
     ;;
     ;; simple loop
     ;;
     ((looking-at "loop\\>")
      (setq pos (ada-get-indent-block-start orgpoint))
      (if (equal label 0)
          pos
        (list (+ (car pos) label) (cdr pos))))

     ;;
     ;; 'for'- loop (or also a for ... use statement)
     ;;
     ((looking-at "for\\>")
      (cond
       ;;
       ;; for ... use
       ;;
       ((save-excursion
          (and
           (goto-char (match-end 0))
           (ada-goto-next-non-ws orgpoint)
           (forward-word 1)
           (if (= (char-after) ?') (forward-word 1) t)
           (ada-goto-next-non-ws orgpoint)
           (looking-at "\\<use\\>")
           ;;
           ;; check if there is a 'record' before point
           ;;
           (progn
             (setq match-cons (ada-search-ignore-string-comment
                               "record" nil orgpoint nil 'word-search-forward))
             t)))
        (if match-cons
            (goto-char (car match-cons)))
        (list (save-excursion (back-to-indentation) (point)) 'ada-indent))
       ;;
       ;; for..loop
       ;;
       ((save-excursion
          (setq match-cons (ada-search-ignore-string-comment
                            "loop" nil orgpoint nil 'word-search-forward)))
        (goto-char (car match-cons))
        ;;
        ;; indent according to 'loop', if it's first in the line;
        ;; otherwise to 'for'
        ;;
        (unless (save-excursion
                  (back-to-indentation)
                  (looking-at "\\<loop\\>"))
          (goto-char pos))
        (list (+ (save-excursion (back-to-indentation) (point)) label)
              'ada-indent))
       ;;
       ;; for-statement is broken
       ;;
       (t
        (list (+ (save-excursion (back-to-indentation) (point)) label)
              'ada-broken-indent))))

     ;;
     ;; 'while'-loop
     ;;
     ((looking-at "while\\>")
      ;;
      ;; while..loop ?
      ;;
      (if (save-excursion
            (setq match-cons (ada-search-ignore-string-comment
                              "loop" nil orgpoint nil 'word-search-forward)))

          (progn
            (goto-char (car match-cons))
            ;;
            ;; indent according to 'loop', if it's first in the line;
            ;; otherwise to 'while'.
            ;;
            (unless (save-excursion
                      (back-to-indentation)
                      (looking-at "\\<loop\\>"))
              (goto-char pos))
            (list (+ (save-excursion (back-to-indentation) (point)) label)
                  'ada-indent))

        (list (+ (save-excursion (back-to-indentation) (point)) label)
              'ada-broken-indent))))))

(defun ada-get-indent-type (orgpoint)
  "Calculates the indentation when before a type statement.
ORGPOINT is the limit position used in the calculation."
  (let ((match-dat nil))
    (cond
     ;;
     ;; complete record declaration
     ;;
     ((save-excursion
        (and
         (setq match-dat (ada-search-ignore-string-comment
                          "end" nil orgpoint nil 'word-search-forward))
         (ada-goto-next-non-ws)
         (looking-at "\\<record\\>")
         (forward-word 1)
         (ada-goto-next-non-ws)
         (= (char-after) ?\;)))
      (goto-char (car match-dat))
      (list (save-excursion (back-to-indentation) (point)) 0))
     ;;
     ;; record type
     ;;
     ((save-excursion
        (setq match-dat (ada-search-ignore-string-comment
                         "record" nil orgpoint nil 'word-search-forward)))
      (goto-char (car match-dat))
      (list (save-excursion (back-to-indentation) (point)) 'ada-indent))
     ;;
     ;; complete type declaration
     ;;
     ((save-excursion
        (ada-search-ignore-string-comment ";" nil orgpoint nil
                                          'search-forward))
      (list (save-excursion (back-to-indentation) (point)) 0))
     ;;
     ;; "type ... is", but not "type ... is ...", which is broken
     ;;
     ((save-excursion
        (and
         (ada-search-ignore-string-comment "is" nil orgpoint nil
                                           'word-search-forward)
         (not (ada-goto-next-non-ws orgpoint))))
      (list (save-excursion (back-to-indentation) (point)) 'ada-broken-indent))
     ;;
     ;; broken statement
     ;;
     (t
      (list (save-excursion (back-to-indentation) (point))
            'ada-broken-indent)))))

\f
;; -----------------------------------------------------------
;; -- searching and matching
;; -----------------------------------------------------------

(defun ada-goto-stmt-start ()
  "Moves point to the beginning of the statement that point is in or after.
Returns the new position of point.
As a special case, if we are looking at a closing parenthesis, skip to the
open parenthesis."
  (let ((match-dat nil)
        (orgpoint (point)))

    (setq match-dat (ada-search-prev-end-stmt))
    (if match-dat

        ;;
        ;; found a previous end-statement => check if anything follows
        ;;
        (unless (looking-at "declare")
          (progn
            (unless (save-excursion
                      (goto-char (cdr match-dat))
                      (ada-goto-next-non-ws orgpoint))
              ;;
              ;; nothing follows => it's the end-statement directly in
              ;;                    front of point => search again
              ;;
              (setq match-dat (ada-search-prev-end-stmt)))
            ;;
            ;; if found the correct end-statement => goto next non-ws
            ;;
            (if match-dat
                (goto-char (cdr match-dat)))
            (ada-goto-next-non-ws)
            ))

      ;;
      ;; no previous end-statement => we are at the beginning of the
      ;;                              accessible part of the buffer
      ;;
      (progn
        (goto-char (point-min))
        ;;
        ;; skip to the very first statement, if there is one
          ;;
        (unless (ada-goto-next-non-ws orgpoint)
          (goto-char orgpoint))))
    (point)))


(defun ada-search-prev-end-stmt ()
  "Moves point to previous end-statement.
Returns a cons cell whose car is the beginning and whose cdr the end of the
match."
  (let ((match-dat nil)
        (found nil))

    ;; search until found or beginning-of-buffer
    (while
        (and
         (not found)
         (setq match-dat (ada-search-ignore-string-comment
                          ada-end-stmt-re t)))

      (goto-char (car match-dat))
      (unless (ada-in-open-paren-p)
        (if (and (looking-at
                  "\\<\\(record\\|loop\\|select\\|else\\|then\\)\\>")
                 (save-excursion
                   (ada-goto-previous-word)
                   (looking-at "\\<\\(end\\|or\\|and\\)\\>[ \t]*[^;]")))
            (forward-word -1)

          (save-excursion
            (goto-char (cdr match-dat))
            (ada-goto-next-non-ws)
            (looking-at "(")
            ;;  words that can go after an 'is'
            (unless (looking-at
                     (eval-when-compile
                       (concat "\\<"
                               (regexp-opt '("separate" "access" "array"
                                             "abstract" "new") t)
                               "\\>\\|(")))
              (setq found t))))
        ))

    (if found
        match-dat
      nil)))


(defun ada-goto-next-non-ws (&optional limit)
  "Skips white spaces, newlines and comments to next non-ws character.
Stop the search at LIMIT.
Do not call this function from within a string."
  (unless limit
    (setq limit (point-max)))
  (while (and (<= (point) limit)
              (progn (forward-comment 10000)
                     (if (and (not (eobp))
                              (save-excursion (forward-char 1)
                                              (ada-in-string-p)))
                         (progn (forward-sexp 1) t)))))
  (if (< (point) limit)
      (point)
    nil)
  )


(defun ada-goto-stmt-end (&optional limit)
  "Moves point to the end of the statement that point is in or before.
Returns the new position of point or nil if not found.
Stop the search at LIMIT."
  (if (ada-search-ignore-string-comment ada-end-stmt-re nil limit)
      (point)
    nil))


(defun ada-goto-next-word (&optional backward)
  "Moves point to the beginning of the next word of Ada code.
If BACKWARD is non-nil, jump to the beginning of the previous word.
Returns the new position of point or nil if not found."
  (let ((match-cons nil)
        (orgpoint (point))
        (old-syntax (char-to-string (char-syntax ?_))))
    (modify-syntax-entry ?_ "w")
    (unless backward
      (skip-syntax-forward "w"))
    (if (setq match-cons
             (if backward
                 (ada-search-ignore-string-comment "\\w" t nil t)
               (ada-search-ignore-string-comment "\\w" nil nil t)))
        ;;
        ;; move to the beginning of the word found
        ;;
        (progn
          (goto-char (car match-cons))
          (skip-syntax-backward "w")
          (point))
      ;;
      ;; if not found, restore old position of point
      ;;
      (goto-char orgpoint)
      'nil)
    (modify-syntax-entry ?_ old-syntax))
  )


(defun ada-check-matching-start (keyword)
  "Signals an error if matching block start is not KEYWORD.
Moves point to the matching block start."
  (ada-goto-matching-start 0)
  (unless (looking-at (concat "\\<" keyword "\\>"))
    (error "matching start is not '%s'" keyword)))


(defun ada-check-defun-name (defun-name)
  "Checks if the name of the matching defun really is DEFUN-NAME.
Assumes point to be already positioned by 'ada-goto-matching-start'.
Moves point to the beginning of the declaration."

  ;; named block without a `declare'
  (if (save-excursion
        (ada-goto-previous-word)
        (looking-at (concat "\\<" defun-name "\\> *:")))
      t                                 ; do nothing
    ;;
    ;; 'accept' or 'package' ?
    ;;
    (unless (looking-at ada-subprog-start-re)
      (ada-goto-matching-decl-start))
    ;;
    ;; 'begin' of 'procedure'/'function'/'task' or 'declare'
    ;;
    (save-excursion
      ;;
      ;; a named 'declare'-block ?
      ;;
      (if (looking-at "\\<declare\\>")
          (ada-goto-stmt-start)
        ;;
        ;; no, => 'procedure'/'function'/'task'/'protected'
        ;;
        (progn
          (forward-word 2)
          (backward-word 1)
          ;;
          ;; skip 'body' 'type'
          ;;
          (if (looking-at "\\<\\(body\\|type\\)\\>")
              (forward-word 1))
          (forward-sexp 1)
          (backward-sexp 1)))
      ;;
      ;; should be looking-at the correct name
      ;;
      (unless (looking-at (concat "\\<" defun-name "\\>"))
        (error "matching defun has different name: %s"
               (buffer-substring (point)
                                 (progn (forward-sexp 1) (point))))))))

(defun ada-goto-matching-decl-start (&optional noerror recursive)
  "Moves point to the matching declaration start of the current 'begin'.
If NOERROR is non-nil, it only returns nil if no match was found."
  (let ((nest-count 1)
        (first (not recursive))
        (count-generic nil)
        (stop-at-when nil)
        )

    ;;  Ignore "when" most of the time, except if we are looking at the
    ;;  beginning of a block (structure:  case .. is
    ;;                                    when ... =>
    ;;                                       begin ...
    ;;                                       exception ... )
    (if (looking-at "begin")
        (setq stop-at-when t))

    (if (or
         (looking-at "\\<\\(package\\|procedure\\|function\\)\\>")
         (save-excursion
           (ada-search-ignore-string-comment
            "\\<\\(package\\|procedure\\|function\\|generic\\)\\>" t)
           (looking-at "generic")))
        (setq count-generic t))

    ;; search backward for interesting keywords
    (while (and
            (not (zerop nest-count))
            (ada-search-ignore-string-comment ada-matching-decl-start-re t))
      ;;
      ;; calculate nest-depth
      ;;
      (cond
       ;;
       ((looking-at "end")
        (ada-goto-matching-start 1 noerror)

        ;;  In some case, two begin..end block can follow each other closely,
        ;;  which we have to detect, as in
        ;;     procedure P is
        ;;        procedure Q is
        ;;        begin
        ;;        end;
        ;;     begin    --  here we should go to procedure, not begin
        ;;     end

        (if (looking-at "begin")
            (let ((loop-again t))
              (save-excursion
                (while loop-again
                  ;;  If begin was just there as the beginning of a block
                  ;;  (with no declare) then do nothing, otherwise just
                  ;;  register that we have to find the statement that
                  ;;  required the begin

                  (ada-search-ignore-string-comment
                   "\\<\\(declare\\|begin\\|end\\|procedure\\|function\\|task\\|package\\)\\>"
                   t)

                  (if (looking-at "end")
                      (ada-goto-matching-decl-start noerror t)

                    (setq loop-again nil)
                    (unless (looking-at "begin")
                      (setq nest-count (1+ nest-count))))
                  ))
              )))
       ;;
       ((looking-at "generic")
        (if count-generic
            (progn
              (setq first nil)
              (setq nest-count (1- nest-count)))))
       ;;
       ((looking-at "if")
        (save-excursion
          (forward-word -1)
          (unless (looking-at "\\<end[ \t\n]*if\\>")
            (progn
              (setq nest-count (1- nest-count))
              (setq first nil)))))

       ;;
       ((looking-at "declare\\|generic")
        (setq nest-count (1- nest-count))
        (setq first nil))
       ;;
       ((looking-at "is")
        ;; check if it is only a type definition, but not a protected
        ;; type definition, which should be handled like a procedure.
        (if (or (looking-at "is[ \t]+<>")
                (save-excursion
                  (forward-comment -10000)
                  (forward-char -1)

                  ;; Detect if we have a closing parenthesis (Could be
                  ;; either the end of subprogram parameters or (<>)
                  ;; in a type definition
                  (if (= (char-after) ?\))
                      (progn
                        (forward-char 1)
                        (backward-sexp 1)
                        (forward-comment -10000)
                        ))
                  (skip-chars-backward "a-zA-Z0-9_.'")
                  (ada-goto-previous-word)
                  (and
                   (looking-at "\\<\\(sub\\)?type\\>")
                   (save-match-data
                     (ada-goto-previous-word)
                     (not (looking-at "\\<protected\\>"))))
                  ))                    ; end of `or'
            (goto-char (match-beginning 0))
          (progn
            (setq nest-count (1- nest-count))
            (setq first nil))))

       ;;
       ((looking-at "new")
        (if (save-excursion
              (ada-goto-previous-word)
              (looking-at "is"))
            (goto-char (match-beginning 0))))
       ;;
       ((and first
             (looking-at "begin"))
        (setq nest-count 0))
       ;;
       ((looking-at "when")
        (if stop-at-when
            (setq nest-count (1- nest-count)))
        (setq first nil))
       ;;
       (t
        (setq nest-count (1+ nest-count))
        (setq first nil)))

      );; end of loop

    ;; check if declaration-start is really found
    (if (and
         (zerop nest-count)
         (if (looking-at "is")
             (ada-search-ignore-string-comment ada-subprog-start-re t)
           (looking-at "declare\\|generic")))
        t
      (if noerror nil
        (error "no matching proc/func/task/declare/package/protected")))
    ))

(defun ada-goto-matching-start (&optional nest-level noerror gotothen)
  "Moves point to the beginning of a block-start.
Which block depends on the value of NEST-LEVEL, which defaults to zero. If
NOERROR is non-nil, it only returns nil if no matching start was found.
If GOTOTHEN is non-nil, point moves to the 'then' following 'if'."
  (let ((nest-count (if nest-level nest-level 0))
        (found nil)
        (pos nil))

    ;;
    ;; search backward for interesting keywords
    ;;
    (while (and
            (not found)
            (ada-search-ignore-string-comment ada-matching-start-re t))

      (unless (and (looking-at "\\<record\\>")
                   (save-excursion
                     (forward-word -1)
                     (looking-at "\\<null\\>")))
        (progn
          ;;
          ;; calculate nest-depth
          ;;
          (cond
           ;; found block end => increase nest depth
           ((looking-at "end")
            (setq nest-count (1+ nest-count)))

           ;; found loop/select/record/case/if => check if it starts or
           ;; ends a block
           ((looking-at "loop\\|select\\|record\\|case\\|if")
            (setq pos (point))
            (save-excursion
              ;;
              ;; check if keyword follows 'end'
              ;;
              (ada-goto-previous-word)
              (if (looking-at "\\<end\\>[ \t]*[^;]")
                  ;; it ends a block => increase nest depth
                  (progn
                    (setq nest-count (1+ nest-count))
                    (setq pos (point)))
                ;; it starts a block => decrease nest depth
                (setq nest-count (1- nest-count))))
            (goto-char pos))

           ;; found package start => check if it really is a block
           ((looking-at "package")
            (save-excursion
              ;; ignore if this is just a renames statement
              (let ((current (point))
                    (pos (ada-search-ignore-string-comment
                          "\\<\\(is\\|renames\\|;\\)\\>" nil)))
                (if pos
                    (goto-char (car pos))
                  (error (concat
                          "No matching 'is' or 'renames' for 'package' at"
                          " line "
                          (number-to-string (count-lines (point-min)
                                                         (1+ current)))))))
              (unless (looking-at "renames")
                (progn
                  (forward-word 1)
                  (ada-goto-next-non-ws)
                  ;; ignore it if it is only a declaration with 'new'
                  (if (not (looking-at "\\<\\(new\\|separate\\)\\>"))
                      (setq nest-count (1- nest-count)))))))
           ;; found task start => check if it has a body
           ((looking-at "task")
            (save-excursion
              (forward-word 1)
              (ada-goto-next-non-ws)
              (cond
               ((looking-at "\\<body\\>"))
               ((looking-at "\\<type\\>")
                ;;  In that case, do nothing if there is a "is"
                (forward-word 2);; skip "type"
                (ada-goto-next-non-ws);; skip type name

                ;; Do nothing if we are simply looking at a simple
                ;; "task type name;" statement with no block
                (unless (looking-at ";")
                  (progn
                    ;; Skip the parameters
                    (if (looking-at "(")
                        (ada-search-ignore-string-comment ")" nil))
                    (let ((tmp (ada-search-ignore-string-comment
                                "\\<\\(is\\|;\\)\\>" nil)))
                      (if tmp
                          (progn
                            (goto-char (car tmp))
                            (if (looking-at "is")
                                (setq nest-count (1- nest-count)))))))))
               (t
                ;; Check if that task declaration had a block attached to
                ;; it (i.e do nothing if we have just "task name;")
                (unless (progn (forward-word 1)
                               (looking-at "[ \t]*;"))
                  (setq nest-count (1- nest-count)))))))
           ;; all the other block starts
           (t
            (setq nest-count (1- nest-count)))) ; end of 'cond'

          ;; match is found, if nest-depth is zero
          ;;
          (setq found (zerop nest-count))))) ; end of loop

    (if found
        ;;
        ;; match found => is there anything else to do ?
        ;;
        (progn
          (cond
           ;;
           ;; found 'if' => skip to 'then', if it's on a separate line
           ;;                               and GOTOTHEN is non-nil
           ;;
           ((and
             gotothen
             (looking-at "if")
             (save-excursion
               (ada-search-ignore-string-comment "then" nil nil nil
                                                 'word-search-forward)
               (back-to-indentation)
               (looking-at "\\<then\\>")))
            (goto-char (match-beginning 0)))
           ;;
           ;; found 'do' => skip back to 'accept'
           ;;
           ((looking-at "do")
            (unless (ada-search-ignore-string-comment "accept" t nil nil
                                                      'word-search-backward)
              (error "missing 'accept' in front of 'do'"))))
          (point))

      (if noerror
          nil
        (error "no matching start")))))


(defun ada-goto-matching-end (&optional nest-level noerror)
  "Moves point to the end of a block.
Which block depends on the value of NEST-LEVEL, which defaults to zero.
If NOERROR is non-nil, it only returns nil if found no matching start."
  (let ((nest-count (if nest-level nest-level 0))
        (found nil))

    ;;
    ;; search forward for interesting keywords
    ;;
    (while (and
            (not found)
            (ada-search-ignore-string-comment
             (eval-when-compile
               (concat "\\<"
                       (regexp-opt '("end" "loop" "select" "begin" "case"
                                     "if" "task" "package" "record" "do") t)
                       "\\>")) nil))

      ;;
      ;; calculate nest-depth
      ;;
      (backward-word 1)
      (cond
       ;; found block end => decrease nest depth
       ((looking-at "\\<end\\>")
        (setq nest-count (1- nest-count))
        ;; skip the following keyword
        (if (progn
              (skip-chars-forward "end")
              (ada-goto-next-non-ws)
              (looking-at "\\<\\(loop\\|select\\|record\\|case\\|if\\)\\>"))
            (forward-word 1)))
       ;; found package start => check if it really starts a block
       ((looking-at "\\<package\\>")
        (ada-search-ignore-string-comment "is" nil nil nil
                                          'word-search-forward)
        (ada-goto-next-non-ws)
        ;; ignore and skip it if it is only a 'new' package
        (if (looking-at "\\<new\\>")
            (goto-char (match-end 0))
          (setq nest-count (1+ nest-count))))
       ;; all the other block starts
       (t
        (setq nest-count (1+ nest-count))
        (forward-word 1)))              ; end of 'cond'

      ;; match is found, if nest-depth is zero
      ;;
      (setq found (zerop nest-count)))  ; end of loop

    (if found
        t
      (if noerror
          nil
        (error "no matching end")))
    ))


(defun ada-search-ignore-string-comment
  (search-re &optional backward limit paramlists search-func)
  "Regexp-search for SEARCH-RE, ignoring comments, strings.
If PARAMLISTS is nil, ignore parameter lists. Returns a cons cell of
begin and end of match data or nil, if not found.
The search is done using SEARCH-FUNC, which should search backward if
BACKWARD is non-nil, forward otherwise. SEARCH-FUNC can be optimized in case
we are searching for a constant string.
The search stops at pos LIMIT.
Point is moved at the beginning of the search-re."
  (let (found
        begin
        end
        parse-result
        (previous-syntax-table (syntax-table)))

    (unless search-func
      (setq search-func (if backward 're-search-backward 're-search-forward)))

    ;;
    ;; search until found or end-of-buffer
    ;; We have to test that we do not look further than limit
    ;;
    (set-syntax-table ada-mode-symbol-syntax-table)
    (while (and (not found)
                (or (not limit)
                    (or (and backward (<= limit (point)))
                        (>= limit (point))))
                (funcall search-func search-re limit 1))
      (setq begin (match-beginning 0))
      (setq end (match-end 0))

      (setq parse-result (parse-partial-sexp
                          (save-excursion (beginning-of-line) (point))
                          (point)))

      (cond
       ;;
       ;; If inside a string, skip it (and the following comments)
       ;;
       ((ada-in-string-p parse-result)
        (if ada-xemacs
            (search-backward "\"" nil t)
          (goto-char (nth 8 parse-result)))
        (unless backward (forward-sexp 1)))
       ;;
       ;; If inside a comment, skip it (and the following comments)
       ;; There is a special code for comments at the end of the file
       ;;
       ((ada-in-comment-p parse-result)
        (if ada-xemacs
            (progn
              (forward-line 1)
              (beginning-of-line)
              (forward-comment -1))
          (goto-char (nth 8 parse-result)))
        (unless backward
          ;;  at the end of the file, it is not possible to skip a comment
          ;;  so we just go at the end of the line
          (if (forward-comment 1)
              (progn
                (forward-comment 1000)
                (beginning-of-line))
            (end-of-line))))
       ;;
       ;; directly in front of a comment => skip it, if searching forward
       ;;
       ((and (= (char-after begin) ?-) (= (char-after (1+ begin)) ?-))
        (unless backward (progn (forward-char -1) (forward-comment 1000))))

       ;;
       ;; found a parameter-list but should ignore it => skip it
       ;;
       ((and (not paramlists) (ada-in-paramlist-p))
        (if backward
            (search-backward "(" nil t)
          (search-forward ")" nil t)))
       ;;
       ;; found what we were looking for
       ;;
       (t
        (setq found t))))               ; end of loop

    (set-syntax-table previous-syntax-table)

    (if found
        (cons begin end)
      nil)))

;; -------------------------------------------------------
;; --  Testing the position of the cursor
;; -------------------------------------------------------

(defun ada-in-decl-p ()
  "Returns t if point is inside a declarative part.
Assumes point to be at the end of a statement."
  (or (ada-in-paramlist-p)
      (save-excursion
        (ada-goto-matching-decl-start t))))


(defun ada-looking-at-semi-or ()
  "Returns t if looking-at an 'or' following a semicolon."
  (save-excursion
    (and (looking-at "\\<or\\>")
         (progn
           (forward-word 1)
           (ada-goto-stmt-start)
           (looking-at "\\<or\\>")))))


(defun ada-looking-at-semi-private ()
  "Returns t if looking at the start of a private section in a package.
Returns nil if the private is part of the package name, as in
'private package A is...' (this can only happen at top level)."
  (save-excursion
    (and (looking-at "\\<private\\>")
         (not (looking-at "\\<private[ \t]*\\(package\\|generic\\)"))

         ;;  Make sure this is the start of a private section (ie after
         ;;  a semicolon or just after the package declaration, but not
         ;;  after a 'type ... is private' or 'is new ... with private'
         (progn (forward-comment -1000)
                (or (= (char-before) ?\;)
                    (and (forward-word -3)
                         (looking-at "\\<package\\>")))))))


(defun ada-in-paramlist-p ()
  "Returns t if point is inside a parameter-list."
  (save-excursion
    (and
     (ada-search-ignore-string-comment "(\\|)" t nil t)
     ;; inside parentheses ?
     (= (char-after) ?\()

     ;; We could be looking at two things here:
     ;;  operator definition:   function "." (
     ;;  subprogram definition: procedure .... (
     ;; Let's skip back over the first one
     (progn
       (skip-syntax-backward " ")
       (if (= (char-before) ?\")
           (backward-char 3)
         (backward-word 1))
       t)

     ;; and now over the second one
     (backward-word 1)

     ;; We should ignore the case when the reserved keyword is in a
     ;; comment (for instance, when we have:
     ;;    -- .... package
     ;;    Test (A)
     ;; we should return nil

     (not (ada-in-string-or-comment-p))

     ;; right keyword two words before parenthesis ?
     ;; Type is in this list because of discriminants
     (looking-at (eval-when-compile
                   (concat "\\<\\("
                           "procedure\\|function\\|body\\|"
                           "task\\|entry\\|accept\\|"
                           "access[ \t]+procedure\\|"
                           "access[ \t]+function\\|"
                           "pragma\\|"
                           "type\\)\\>"))))))

(defun ada-search-ignore-complex-boolean (regexp backwardp)
  "Like `ada-search-ignore-string-comment', except that it also ignores
boolean expressions 'and then' and 'or else'."
  (let (result)
  (while (and (setq result (ada-search-ignore-string-comment regexp backwardp))
              (save-excursion (forward-word -1)
                              (looking-at "and then\\|or else"))))
  result))

(defun ada-in-open-paren-p ()
  "Returns the position of the first non-ws behind the last unclosed
parenthesis, or nil."
  (save-excursion
    (let ((parse (parse-partial-sexp
                  (point)
                  (or (car (ada-search-ignore-complex-boolean
                            "\\<\\(;\\|is\\|then\\|loop\\|begin\\|else\\)\\>"
                            t))
                      (point-min)))))

      (if (nth 1 parse)
          (progn
            (goto-char (1+ (nth 1 parse)))
            (skip-chars-forward " \t")
            (point))))))

\f
;; -----------------------------------------------------------
;; --  Behavior Of TAB Key
;; -----------------------------------------------------------

(defun ada-tab ()
  "Do indenting or tabbing according to `ada-tab-policy'.
In Transient Mark mode, if the mark is active, operate on the contents
of the region.  Otherwise, operates only on the current line."
  (interactive)
  (cond ((eq ada-tab-policy 'indent-rigidly) (ada-tab-hard))
        ((eq ada-tab-policy 'indent-auto)
         ;;  transient-mark-mode and mark-active are not defined in XEmacs
         (if (or (and ada-xemacs (funcall (symbol-function 'region-active-p)))
                 (and (not ada-xemacs)
                      (symbol-value 'transient-mark-mode)
                      (symbol-value 'mark-active)))
             (ada-indent-region (region-beginning) (region-end))
           (ada-indent-current)))
        ((eq ada-tab-policy 'always-tab) (error "not implemented"))
        ))

(defun ada-untab (arg)
  "Delete leading indenting according to `ada-tab-policy'."
  (interactive "P")
  (cond ((eq ada-tab-policy 'indent-rigidly) (ada-untab-hard))
        ((eq ada-tab-policy 'indent-auto) (error "not implemented"))
        ((eq ada-tab-policy 'always-tab) (error "not implemented"))
        ))

(defun ada-indent-current-function ()
  "Ada mode version of the indent-line-function."
  (interactive "*")
  (let ((starting-point (point-marker)))
    (beginning-of-line)
    (ada-tab)
    (if (< (point) starting-point)
        (goto-char starting-point))
    (set-marker starting-point nil)
    ))

(defun ada-tab-hard ()
  "Indent current line to next tab stop."
  (interactive)
  (save-excursion
    (beginning-of-line)
    (insert-char ?  ada-indent))
  (if (save-excursion (= (point) (progn (beginning-of-line) (point))))
      (forward-char ada-indent)))

(defun ada-untab-hard ()
  "indent current line to previous tab stop."
  (interactive)
  (let  ((bol (save-excursion (progn (beginning-of-line) (point))))
         (eol (save-excursion (progn (end-of-line) (point)))))
    (indent-rigidly bol eol  (- 0 ada-indent))))


\f
;; ------------------------------------------------------------
;; --  Miscellaneous
;; ------------------------------------------------------------

(defun ada-gnat-style ()
  "Clean up comments, `(' and `,' for GNAT style checking switch."
  (interactive)
  (save-excursion
    (goto-char (point-min))
    (while (re-search-forward "--[ \t]*\\([^-]\\)" nil t)
      (replace-match "--  \\1"))
    (goto-char (point-min))
    (while (re-search-forward "\\>(" nil t)
      (replace-match " ("))
    (goto-char (point-min))
    (while (re-search-forward "([ \t]+" nil t)
      (replace-match "("))
    (goto-char (point-min))
    (while (re-search-forward ")[ \t]+)" nil t)
      (replace-match "))"))
    (goto-char (point-min))
    (while (re-search-forward "\\>:" nil t)
      (replace-match " :"))
    (goto-char (point-min))
    (while (re-search-forward ",\\<" nil t)
      (replace-match ", "))
    (goto-char (point-min))
    (while (re-search-forward "[ \t]*\\.\\.[ \t]*" nil t)
      (replace-match " .. "))
    (goto-char (point-min))
    (while (re-search-forward "[ \t]*\\([-:+*/]\\)[ \t]*" nil t)
      (if (not (ada-in-string-or-comment-p))
          (progn
            (forward-char -1)
            (cond
             ((looking-at "/=")
              (replace-match " /= "))
             ((looking-at ":=")
              (replace-match ":= "))
             ((not (looking-at "--"))
              (replace-match " \\1 ")))
            (forward-char 2))))
    ))


\f
;; -------------------------------------------------------------
;; --  Moving To Procedures/Packages/Statements
;; -------------------------------------------------------------

(defun ada-move-to-start ()
  "Moves point to the matching start of the current Ada structure."
  (interactive)
  (let ((pos (point))
        (previous-syntax-table (syntax-table)))
    (unwind-protect
        (progn
          (set-syntax-table ada-mode-symbol-syntax-table)

          (message "searching for block start ...")
          (save-excursion
            ;;
            ;; do nothing if in string or comment or not on 'end ...;'
            ;;            or if an error occurs during processing
            ;;
            (or
             (ada-in-string-or-comment-p)
             (and (progn
                    (or (looking-at "[ \t]*\\<end\\>")
                        (backward-word 1))
                    (or (looking-at "[ \t]*\\<end\\>")
                        (backward-word 1))
                    (or (looking-at "[ \t]*\\<end\\>")
                        (error "not on end ...;")))
                  (ada-goto-matching-start 1)
                  (setq pos (point))

                  ;;
                  ;; on 'begin' => go on, according to user option
                  ;;
                  ada-move-to-declaration
                  (looking-at "\\<begin\\>")
                  (ada-goto-matching-decl-start)
                  (setq pos (point))))

            )                           ; end of save-excursion

          ;; now really move to the found position
          (goto-char pos)
          (message "searching for block start ... done"))

      ;; restore syntax-table
      (set-syntax-table previous-syntax-table))))

(defun ada-move-to-end ()
  "Moves point to the matching end of the block around point.
Moves to 'begin' if in a declarative part."
  (interactive)
  (let ((pos (point))
        (previous-syntax-table (syntax-table)))
    (unwind-protect
        (progn
          (set-syntax-table ada-mode-symbol-syntax-table)

          (message "searching for block end ...")
          (save-excursion

            (forward-char 1)
            (cond
             ;; directly on 'begin'
             ((save-excursion
                (ada-goto-previous-word)
                (looking-at "\\<begin\\>"))
              (ada-goto-matching-end 1))
             ;; on first line of defun declaration
             ((save-excursion
                (and (ada-goto-stmt-start)
                     (looking-at "\\<function\\>\\|\\<procedure\\>" )))
              (ada-search-ignore-string-comment "begin" nil nil nil
                                                'word-search-forward))
             ;; on first line of task declaration
             ((save-excursion
                (and (ada-goto-stmt-start)
                     (looking-at "\\<task\\>" )
                     (forward-word 1)
                     (ada-goto-next-non-ws)
                     (looking-at "\\<body\\>")))
              (ada-search-ignore-string-comment "begin" nil nil nil
                                                'word-search-forward))
             ;; accept block start
             ((save-excursion
                (and (ada-goto-stmt-start)
                     (looking-at "\\<accept\\>" )))
              (ada-goto-matching-end 0))
             ;; package start
             ((save-excursion
                (and (ada-goto-matching-decl-start t)
                     (looking-at "\\<package\\>")))
              (ada-goto-matching-end 1))
             ;; inside a 'begin' ... 'end' block
             ((save-excursion
                (ada-goto-matching-decl-start t))
              (ada-search-ignore-string-comment "begin" nil nil nil
                                                'word-search-forward))
             ;; (hopefully ;-) everything else
             (t
              (ada-goto-matching-end 1)))
            (setq pos (point))
            )

          ;; now really move to the position found
          (goto-char pos)
          (message "searching for block end ... done"))

      ;; restore syntax-table
      (set-syntax-table previous-syntax-table))))

(defun ada-next-procedure ()
  "Moves point to next procedure."
  (interactive)
  (end-of-line)
  (if (re-search-forward ada-procedure-start-regexp nil t)
      (goto-char (match-beginning 1))
    (error "No more functions/procedures/tasks")))

(defun ada-previous-procedure ()
  "Moves point to previous procedure."
  (interactive)
  (beginning-of-line)
  (if (re-search-backward ada-procedure-start-regexp nil t)
      (goto-char (match-beginning 1))
    (error "No more functions/procedures/tasks")))

(defun ada-next-package ()
  "Moves point to next package."
  (interactive)
  (end-of-line)
  (if (re-search-forward ada-package-start-regexp nil t)
      (goto-char (match-beginning 1))
    (error "No more packages")))

(defun ada-previous-package ()
  "Moves point to previous package."
  (interactive)
  (beginning-of-line)
  (if (re-search-backward ada-package-start-regexp nil t)
      (goto-char (match-beginning 1))
    (error "No more packages")))

\f
;; ------------------------------------------------------------
;; --  Define keymap and menus for Ada
;; -------------------------------------------------------------

(defun ada-create-keymap ()
  "Create the keymap associated with the Ada mode."

  ;; Indentation and Formatting
  (define-key ada-mode-map "\C-j"     'ada-indent-newline-indent-conditional)
  (define-key ada-mode-map "\C-m"     'ada-indent-newline-indent-conditional)
  (define-key ada-mode-map "\t"       'ada-tab)
  (define-key ada-mode-map "\C-c\t"   'ada-justified-indent-current)
  (define-key ada-mode-map "\C-c\C-l" 'ada-indent-region)
  (if ada-xemacs
      (define-key ada-mode-map '(shift tab)    'ada-untab)
    (define-key ada-mode-map [S-tab]    'ada-untab))
  (define-key ada-mode-map "\C-c\C-f" 'ada-format-paramlist)
  ;; We don't want to make meta-characters case-specific.

  ;; Movement
  (define-key ada-mode-map "\M-\C-e"  'ada-next-procedure)
  (define-key ada-mode-map "\M-\C-a"  'ada-previous-procedure)
  (define-key ada-mode-map "\C-c\C-a" 'ada-move-to-start)
  (define-key ada-mode-map "\C-c\C-e" 'ada-move-to-end)

  ;; Compilation
  (unless (lookup-key ada-mode-map "\C-c\C-c")
    (define-key ada-mode-map "\C-c\C-c" 'compile))

  ;; Casing
  (define-key ada-mode-map "\C-c\C-b" 'ada-adjust-case-buffer)
  (define-key ada-mode-map "\C-c\C-t" 'ada-case-read-exceptions)
  (define-key ada-mode-map "\C-c\C-y" 'ada-create-case-exception)

  ;; On XEmacs, you can easily specify whether DEL should deletes
  ;; one character forward or one character backward. Take this into
  ;; account
  (if (boundp 'delete-key-deletes-forward)
      (define-key ada-mode-map [backspace] 'backward-delete-char-untabify)
    (define-key ada-mode-map "\177" 'backward-delete-char-untabify))

  ;; Make body
  (define-key ada-mode-map "\C-c\C-n" 'ada-make-subprogram-body)

  ;; Use predefined function of Emacs19 for comments (RE)
  (define-key ada-mode-map "\C-c;"    'comment-region)
  (define-key ada-mode-map "\C-c:"    'ada-uncomment-region)
  )


(defun ada-create-menu ()
  "Create the ada menu as shown in the menu bar.
This function is designed to be extensible, so that each compiler-specific file
can add its own items."
  ;;  Note that the separators must have different length in the submenus
  (autoload 'easy-menu-define "easymenu")

  (let ((m      '("Ada"
                  ("Help"   ["Ada Mode" (info "ada-mode") t])))
        (option '(["Auto Casing" (setq ada-auto-case (not ada-auto-case))
                   :style toggle :selected ada-auto-case]
                  ["Auto Indent After Return"
                   (setq ada-indent-after-return (not ada-indent-after-return))
                   :style toggle :selected ada-indent-after-return]))
        (goto   '(["Next compilation error"  next-error t]
                  ["Previous Package" ada-previous-package t]
                  ["Next Package" ada-next-package t]
                  ["Previous Procedure" ada-previous-procedure t]
                  ["Next Procedure" ada-next-procedure t]
                  ["Goto Start Of Statement" ada-move-to-start t]
                  ["Goto End Of Statement" ada-move-to-end t]
                  ["-" nil nil]
                  ["Other File" ff-find-other-file t]
                  ["Other File Other Window" ada-ff-other-window t]))
        (edit   '(["Indent Line"  ada-indent-current-function t]
                  ["Justify Current Indentation" ada-justified-indent-current t]
                  ["Indent Lines in Selection" ada-indent-region t]
                  ["Indent Lines in File" (ada-indent-region (point-min) (point-max)) t]
                  ["Format Parameter List" ada-format-paramlist t]
                  ["-" nil nil]
                  ["Comment Selection" comment-region t]
                  ["Uncomment Selection" ada-uncomment-region t]
                  ["--" nil nil]
                  ["Fill Comment Paragraph" fill-paragraph t]
                  ["Fill Comment Paragraph Justify" ada-fill-comment-paragraph-justify t]
                  ["Fill Comment Paragraph Postfix" ada-fill-comment-paragraph-postfix t]
                  ["---" nil nil]
                  ["Adjust Case Selection"  ada-adjust-case-region t]
                  ["Adjust Case Buffer"     ada-adjust-case-buffer t]
                  ["Create Case Exception"  ada-create-case-exception t]
                  ["Reload Case Exceptions" ada-case-read-exceptions t]
                  ["----" nil nil]
                  ["Make body for subprogram" ada-make-subprogram-body t]))

        )

    ;; Option menu present only if in Ada mode
    (setq m (append m (list (append (list "Options"
                                          (if ada-xemacs :included  :visible)
                                          '(string= mode-name "Ada"))
                                    option))))

    ;; Customize menu always present
    (setq m (append m '(["Customize" (customize-group 'ada)
                         (>= emacs-major-version 20)])))

    ;; Goto and Edit menus present only if in Ada mode
    (setq m (append m (list (append (list "Goto"
                                          (if ada-xemacs :included :visible)
                                          '(string= mode-name "Ada"))
                                    goto)
                            (append (list "Edit"
                                          (if ada-xemacs :included :visible)
                                          '(string= mode-name "Ada"))
                                    edit))))

    (easy-menu-define ada-mode-menu ada-mode-map "Menu keymap for Ada mode" m)
    (if ada-xemacs
        (progn
          (easy-menu-add ada-mode-menu ada-mode-map)
          (define-key ada-mode-map [menu-bar] ada-mode-menu)
          (setq mode-popup-menu (cons "Ada mode" ada-mode-menu)))
      )
    ))

\f
;; -------------------------------------------------------
;;     Commenting/Uncommenting code
;;  The following two calls are provided to enhance the standard
;;  comment-region function, which only allows uncommenting if the
;;  comment is at the beginning of a line. If the line have been re-indented,
;;  we are unable to use comment-region, which makes no sense.
;;
;;  In addition, we provide an interface to the standard comment handling
;;  function for justifying the comments.
;; -------------------------------------------------------

(defadvice comment-region (before ada-uncomment-anywhere)
  (if (and arg
           (< arg 0)
           (string= mode-name "Ada"))
      (save-excursion
        (let ((cs (concat "^[ \t]*" (regexp-quote comment-start))))
          (goto-char beg)
          (while (re-search-forward cs end t)
            (replace-match comment-start))
          ))))

(defun ada-uncomment-region (beg end &optional arg)
  "Delete `comment-start' at the beginning of a line in the region."
  (interactive "r\nP")

  ;;  This advice is not needed anymore with Emacs21. However, for older
  ;;  versions, as well as for XEmacs, we still need to enable it.
  (if (or (<= emacs-major-version 20) (boundp 'running-xemacs))
      (progn
        (ad-activate 'comment-region)
        (comment-region beg end (- (or arg 1)))
        (ad-deactivate 'comment-region))
    (comment-region beg end (list (- (or arg 1))))))

(defun ada-fill-comment-paragraph-justify ()
  "Fills current comment paragraph and justifies each line as well."
  (interactive)
  (ada-fill-comment-paragraph 'full))

(defun ada-fill-comment-paragraph-postfix ()
  "Fills current comment paragraph and justifies each line as well.
Adds `ada-fill-comment-postfix' at the end of each line."
  (interactive)
  (ada-fill-comment-paragraph 'full t))

(defun ada-fill-comment-paragraph (&optional justify postfix)
  "Fills the current comment paragraph.
If JUSTIFY is non-nil, each line is justified as well.
If POSTFIX and JUSTIFY are  non-nil, `ada-fill-comment-postfix' is appended
to each filled and justified line.
The paragraph is indented on the first line."
  (interactive "P")

  ;; check if inside comment or just in front a comment
  (if (and (not (ada-in-comment-p))
           (not (looking-at "[ \t]*--")))
      (error "not inside comment"))

  (let* ((indent)
         (from)
         (to)
         (opos             (point-marker))

         ;; Sets this variable to nil, otherwise it prevents
         ;; fill-region-as-paragraph to work on Emacs <= 20.2
         (parse-sexp-lookup-properties nil)

         fill-prefix
         (fill-column (current-fill-column)))

    ;;  Find end of paragraph
    (back-to-indentation)
    (while (and (not (eobp)) (looking-at "--[ \t]*[^ \t\n]"))
      (forward-line 1)

      ;;  If we were at the last line in the buffer, create a dummy empty
      ;;  line at the end of the buffer.
      (if (eolp)
          (insert "\n")
        (back-to-indentation)))
    (beginning-of-line)
    (setq to (point-marker))
    (goto-char opos)

    ;;  Find beginning of paragraph
    (back-to-indentation)
    (while (and (not (bobp)) (looking-at "--[ \t]*[^ \t\n]"))
      (forward-line -1)
      (back-to-indentation))

    ;;  We want one line to above the first one, unless we are at the beginning
    ;;  of the buffer
    (unless (bobp)
      (forward-line 1))
    (beginning-of-line)
    (setq from (point-marker))

    ;;  Calculate the indentation we will need for the paragraph
    (back-to-indentation)
    (setq indent (current-column))
    ;;  unindent the first line of the paragraph
    (delete-region from (point))

    ;;  Remove the old postfixes
    (goto-char from)
    (while (re-search-forward "--\n" to t)
      (replace-match "\n"))

    ;;  Remove the old prefixes (so that the number of spaces after -- is not
    ;;  relevant), except on the first one since `fill-region-as-paragraph'
    ;;  would not put it back on the first line.
    (goto-char (+ from 2))
    (while (re-search-forward "^-- *" to t)
      (replace-match " "))

    (goto-char (1- to))
    (setq to (point-marker))

    ;;  Indent and justify the paragraph
    (setq fill-prefix ada-fill-comment-prefix)
    (set-left-margin from to indent)
    (if postfix
        (setq fill-column (- fill-column (length ada-fill-comment-postfix))))

    (fill-region-as-paragraph from to justify)

    ;;  Add the postfixes if required
    (if postfix
        (save-restriction
          (goto-char from)
          (narrow-to-region from to)
          (while (not (eobp))
            (end-of-line)
            (insert-char ?  (- fill-column (current-column)))
            (insert ada-fill-comment-postfix)
            (forward-line))
          ))

    ;;  In Emacs <= 20.2 and XEmacs <=20.4, there is a bug, and a newline is
    ;;  inserted at the end. Delete it
    (if (or ada-xemacs
            (<= emacs-major-version 19)
            (and (= emacs-major-version 20)
                 (<= emacs-minor-version 2)))
        (progn
          (goto-char to)
          (end-of-line)
          (delete-char 1)))

    (goto-char opos)))


;; ---------------------------------------------------
;;    support for find-file.el
;; These functions are used by find-file to guess the file names from
;; unit names, and to find the other file (spec or body) from the current
;; file (body or spec).
;; It is also used to find in which function we are, so as to put the
;; cursor at the correct position.
;; Standard Ada does not force any relation between unit names and file names,
;; so some of these functions can only be a good approximation. However, they
;; are also overriden in `ada-xref'.el when we know that the user is using
;; GNAT.
;; ---------------------------------------------------

;; Overriden when we work with GNAT, to use gnatkrunch
(defun ada-make-filename-from-adaname (adaname)
  "Determine the filename in which ADANAME is found.
This is a generic function, independent from any compiler."
  (while (string-match "\\." adaname)
    (setq adaname (replace-match "-" t t adaname)))
  (downcase adaname)
  )

(defun ada-other-file-name ()
  "Return the name of the other file.
The name returned is the body if current-buffer is the spec, or the spec
otherwise."

  (let ((is-spec nil)
        (is-body nil)
        (suffixes ada-spec-suffixes)
        (name  (buffer-file-name)))

    ;;  Guess whether we have a spec or a body, and get the basename of the
    ;;  file. Since the extension may not start with '.', we can not use
    ;;  file-name-extension
    (while (and (not is-spec)
                suffixes)
      (if (string-match (concat "\\(.*\\)" (car suffixes) "$") name)
          (setq is-spec t
                name    (match-string 1 name)))
      (setq suffixes (cdr suffixes)))

    (if (not is-spec)
        (progn
          (setq suffixes ada-body-suffixes)
          (while (and (not is-body)
                      suffixes)
            (if (string-match (concat "\\(.*\\)" (car suffixes) "$") name)
                (setq is-body t
                      name    (match-string 1 name)))
            (setq suffixes (cdr suffixes)))))

    ;;  If this wasn't in either list, return name itself
    (if (not (or is-spec is-body))
        name

      ;;  Else find the other possible names
      (if is-spec
          (setq suffixes ada-body-suffixes)
        (setq suffixes ada-spec-suffixes))
      (setq is-spec name)

      (while suffixes
        (if (file-exists-p (concat name (car suffixes)))
            (setq is-spec (concat name (car suffixes))))
        (setq suffixes (cdr suffixes)))

      is-spec)))

(defun ada-which-function-are-we-in ()
  "Return the name of the function whose definition/declaration point is in.
Redefines the function `ff-which-function-are-we-in'."
  (setq ff-function-name nil)
  (save-excursion
    (end-of-line);;  make sure we get the complete name
    (if (or (re-search-backward ada-procedure-start-regexp nil t)
            (re-search-backward ada-package-start-regexp nil t))
        (setq ff-function-name (match-string 0)))
    ))


(defvar ada-last-which-function-line -1
  "Last on which ada-which-function was called")
(defvar ada-last-which-function-subprog 0
  "Last subprogram name returned by ada-which-function")
(make-variable-buffer-local 'ada-last-which-function-subprog)
(make-variable-buffer-local 'ada-last-which-function-line)


(defun ada-which-function ()
  "Returns the name of the function whose body the point is in.
This function works even in the case of nested subprograms, whereas the
standard Emacs function which-function does not.
Note that this function expects subprogram bodies to be terminated by
'end <name>;', not 'end;'.
Since the search can be long, the results are cached."

  (let ((line (count-lines (point-min) (point)))
        (pos (point))
        end-pos
        func-name
        found)

    ;;  If this is the same line as before, simply return the same result
    (if (= line ada-last-which-function-line)
        ada-last-which-function-subprog

      (save-excursion
        ;; In case the current line is also the beginning of the body
        (end-of-line)
        (while (and (ada-in-paramlist-p)
                    (= (forward-line 1) 0))
          (end-of-line))

        ;; Can't simply do forward-word, in case the "is" is not on the
        ;; same line as the closing parenthesis
        (skip-chars-forward "is \t\n")

        ;; No look for the closest subprogram body that has not ended yet.
        ;; Not that we expect all the bodies to be finished by "end <name",
        ;; not simply "end"

        (while (and (not found)
                    (re-search-backward ada-imenu-subprogram-menu-re nil t))
          (setq func-name (match-string 2))
          (if (and (not (ada-in-comment-p))
                   (not (save-excursion
                          (goto-char (match-end 0))
                          (looking-at "[ \t\n]*new"))))
              (save-excursion
                (if (ada-search-ignore-string-comment
                     (concat "end[ \t]+" func-name "[ \t]*;"))
                    (setq end-pos (point))
                  (setq end-pos (point-max)))
                (if (>= end-pos pos)
                    (setq found func-name))))
          )
        (setq ada-last-which-function-line line
              ada-last-which-function-subprog found)
        found))))

(defun ada-ff-other-window ()
  "Find other file in other window using `ff-find-other-file'."
  (interactive)
  (and (fboundp 'ff-find-other-file)
       (ff-find-other-file t)))

(defun ada-set-point-accordingly ()
  "Move to the function declaration that was set by
`ff-which-function-are-we-in'."
  (if ff-function-name
      (progn
        (goto-char (point-min))
        (unless (ada-search-ignore-string-comment
                 (concat ff-function-name "\\b") nil)
          (goto-char (point-min))))))

(defun ada-get-body-name (&optional spec-name)
  "Returns the file name for the body of SPEC-NAME.
If SPEC-NAME is nil, returns the body for the current package.
Returns nil if no body was found."
  (interactive)

  (unless spec-name (setq spec-name (buffer-file-name)))

  ;; If find-file.el was available, use its functions
  (if (functionp 'ff-get-file)
      (ff-get-file-name ada-search-directories
                        (ada-make-filename-from-adaname
                         (file-name-nondirectory
                          (file-name-sans-extension spec-name)))
                        ada-body-suffixes)
    ;; Else emulate it very simply
    (concat (ada-make-filename-from-adaname
             (file-name-nondirectory
              (file-name-sans-extension spec-name)))
            ".adb")))

\f
;; ---------------------------------------------------
;;    support for font-lock.el
;; Strings are a real pain in Ada because a single quote character is
;; overloaded as a string quote and type/instance delimiter.  By default, a
;; single quote is given punctuation syntax in `ada-mode-syntax-table'.
;; So, for Font Lock mode purposes, we mark single quotes as having string
;; syntax when the gods that created Ada determine them to be.
;;
;; This only works in Emacs. See the comments before the grammar functions
;; at the beginning of this file for how this is done with XEmacs.
;; ----------------------------------------------------

(defconst ada-font-lock-syntactic-keywords
  ;; Mark single quotes as having string quote syntax in 'c' instances.
  ;; As a special case, ''' will not be highlighted, but if we do not
  ;; set this special case, then the rest of the buffer is highlighted as
  ;; a string
  ;; This sets the properties of the characters, so that ada-in-string-p
  ;; correctly handles '"' too...
  '(("\\('\\)[^'\n]\\('\\)" (1 (7 . ?')) (2 (7 . ?')))
    ("^[ \t]*\\(#\\(if\\|else\\|elsif\\|end\\)\\)" (1 (11 . ?\n)))
    ))

(defvar ada-font-lock-keywords
  (eval-when-compile
    (list
     ;;
     ;; handle "type T is access function return S;"
     (list "\\<\\(function[ \t]+return\\)\\>" '(1 font-lock-keyword-face) )

     ;;  preprocessor line
     (list "^[ \t]*\\(#.*\n\\)"  '(1 font-lock-type-face t))

     ;;
     ;; accept, entry, function, package (body), protected (body|type),
     ;; pragma, procedure, task (body) plus name.
     (list (concat
            "\\<\\("
            "accept\\|"
            "entry\\|"
            "function\\|"
            "package[ \t]+body\\|"
            "package\\|"
            "pragma\\|"
            "procedure\\|"
            "protected[ \t]+body\\|"
            "protected[ \t]+type\\|"
            "protected\\|"
            "task[ \t]+body\\|"
            "task[ \t]+type\\|"
            "task"
            "\\)\\>[ \t]*"
            "\\(\\sw+\\(\\.\\sw*\\)*\\)?")
           '(1 font-lock-keyword-face) '(2 font-lock-function-name-face nil t))
     ;;
     ;; Optional keywords followed by a type name.
     (list (concat                      ; ":[ \t]*"
            "\\<\\(access[ \t]+all\\|access\\|constant\\|in[ \t]+out\\|in\\|out\\)\\>"
            "[ \t]*"
            "\\(\\sw+\\(\\.\\sw*\\)*\\)?")
           '(1 font-lock-keyword-face nil t) '(2 font-lock-type-face nil t))

     ;;
     ;; Main keywords, except those treated specially below.
     (concat "\\<"
             (regexp-opt
              '("abort" "abs" "abstract" "accept" "access" "aliased" "all"
                "and" "array" "at" "begin" "case" "declare" "delay" "delta"
                "digits" "do" "else" "elsif" "entry" "exception" "exit" "for"
                "generic" "if" "in" "is" "limited" "loop" "mod" "not"
                "null" "or" "others" "private" "protected" "raise"
                "range" "record" "rem" "renames" "requeue" "return" "reverse"
                "select" "separate" "tagged" "task" "terminate" "then" "until"
                "when" "while" "xor") t)
             "\\>")
     ;;
     ;; Anything following end and not already fontified is a body name.
     '("\\<\\(end\\)\\>\\([ \t]+\\)?\\(\\(\\sw\\|[_.]\\)+\\)?"
       (1 font-lock-keyword-face) (3 font-lock-function-name-face nil t))
     ;;
     ;; Keywords followed by a type or function name.
     (list (concat "\\<\\("
                   "new\\|of\\|subtype\\|type"
                   "\\)\\>[ \t]*\\(\\sw+\\(\\.\\sw*\\)*\\)?[ \t]*\\((\\)?")
           '(1 font-lock-keyword-face)
           '(2 (if (match-beginning 4)
                   font-lock-function-name-face
                 font-lock-type-face) nil t))
     ;;
     ;; Keywords followed by a (comma separated list of) reference.
     (list (concat "\\<\\(goto\\|raise\\|use\\|with\\)\\>" ; "when" removed
                   "[ \t\n]*\\(\\(\\sw\\|[_.|, \t\n]\\)+\\)\\W")
           '(1 font-lock-keyword-face) '(2 font-lock-reference-face nil t))
     ;;
     ;; Goto tags.
     '("<<\\(\\sw+\\)>>" 1 font-lock-reference-face)
     ))
  "Default expressions to highlight in Ada mode.")


;; ---------------------------------------------------------
;;  Support for outline.el
;; ---------------------------------------------------------

(defun ada-outline-level ()
  "This is so that `current-column` DTRT in otherwise-hidden text"
  ;; patch from Dave Love <fx@gnu.org>
  (let (buffer-invisibility-spec)
    (save-excursion
      (back-to-indentation)
      (current-column))))

;; ---------------------------------------------------------
;;    Automatic generation of code
;; The Ada-mode has a set of function to automatically generate a subprogram
;; or package body from its spec.
;; These function only use a primary and basic algorithm, this could use a
;; lot of improvement.
;; When the user is using GNAT, we rather use gnatstub to generate an accurate
;; body.
;; ----------------------------------------------------------

(defun ada-gen-treat-proc (match)
  "Make dummy body of a procedure/function specification.
MATCH is a cons cell containing the start and end location of the last search
for ada-procedure-start-regexp."
  (goto-char (car match))
  (let (func-found procname functype)
    (cond
     ((or (looking-at "^[ \t]*procedure")
          (setq func-found (looking-at "^[ \t]*function")))
      ;; treat it as a proc/func
      (forward-word 2)
      (forward-word -1)
      (setq procname (buffer-substring (point) (cdr match))) ; store  proc name

      ;; goto end of procname
      (goto-char (cdr match))

      ;; skip over parameterlist
      (unless (looking-at "[ \t\n]*\\(;\\|return\\)")
        (forward-sexp))

      ;; if function, skip over 'return' and result type.
      (if func-found
          (progn
            (forward-word 1)
            (skip-chars-forward " \t\n")
            (setq functype (buffer-substring (point)
                                             (progn
                                               (skip-chars-forward
                                                "a-zA-Z0-9_\.")
                                               (point))))))
      ;; look for next non WS
      (cond
       ((looking-at "[ \t]*;")
        (delete-region (match-beginning 0) (match-end 0));; delete the ';'
        (ada-indent-newline-indent)
        (insert "is")
        (ada-indent-newline-indent)
        (if func-found
            (progn
              (insert "Result : " functype ";")
              (ada-indent-newline-indent)))
        (insert "begin")
        (ada-indent-newline-indent)
        (if func-found
            (insert "return Result;")
          (insert "null;"))
        (ada-indent-newline-indent)
        (insert "end " procname ";")
        (ada-indent-newline-indent)
        )
       ;; else
       ((looking-at "[ \t\n]*is")
        ;; do nothing
        )
       ((looking-at "[ \t\n]*rename")
        ;; do nothing
        )
       (t
        (message "unknown syntax"))))
     (t
      (if (looking-at "^[ \t]*task")
          (progn
            (message "Task conversion is not yet implemented")
            (forward-word 2)
            (if (looking-at "[ \t]*;")
                (forward-line)
              (ada-move-to-end))
            ))))))

(defun ada-make-body ()
  "Create an Ada package body in the current buffer.
The potential old buffer contents is deleted first, then we copy the
spec buffer in here and modify it to make it a body.
This function typically is to be hooked into `ff-file-created-hooks'."
  (interactive)
  (delete-region (point-min) (point-max))
  (insert-buffer (car (cdr (buffer-list))))
  (ada-mode)

  (let (found ada-procedure-or-package-start-regexp)
    (if (setq found
             (ada-search-ignore-string-comment ada-package-start-regexp nil))
        (progn (goto-char (cdr found))
               (insert " body")
               )
      (error "No package"))

    (setq ada-procedure-or-package-start-regexp
         (concat ada-procedure-start-regexp
                 "\\|"
                 ada-package-start-regexp))

    (while (setq found
                (ada-search-ignore-string-comment
                 ada-procedure-or-package-start-regexp nil))
      (progn
        (goto-char (car found))
        (if (looking-at ada-package-start-regexp)
            (progn (goto-char (cdr found))
                   (insert " body"))
          (ada-gen-treat-proc found))))))


(defun ada-make-subprogram-body ()
  "Make one dummy subprogram body from spec surrounding point."
  (interactive)
  (let* ((found (re-search-backward ada-procedure-start-regexp nil t))
         (spec  (match-beginning 0))
         body-file)
    (if found
        (progn
          (goto-char spec)
          (if (and (re-search-forward "(\\|;" nil t)
                   (= (char-before) ?\())
              (progn
                (ada-search-ignore-string-comment ")" nil)
                (ada-search-ignore-string-comment ";" nil)))
          (setq spec (buffer-substring spec (point)))

          ;; If find-file.el was available, use its functions
          (setq body-file (ada-get-body-name))
          (if body-file
              (find-file body-file)
            (error "No body found for the package. Create it first."))

          (save-restriction
            (widen)
            (goto-char (point-max))
            (forward-comment -10000)
            (re-search-backward "\\<end\\>" nil t)
            ;;  Move to the beginning of the elaboration part, if any
            (re-search-backward "^begin" nil t)
            (newline)
            (forward-char -1)
            (insert spec)
            (re-search-backward ada-procedure-start-regexp nil t)
            (ada-gen-treat-proc (cons (match-beginning 0) (match-end 0)))
            ))
      (error "Not in subprogram spec"))))

;; --------------------------------------------------------
;; Global initializations
;; --------------------------------------------------------

;;  Create the keymap once and for all. If we do that in ada-mode,
;;  the keys changed in the user's .emacs have to be modified
;;  every time
(ada-create-keymap)
(ada-create-menu)

;;  Create the syntax tables, but do not activate them
(ada-create-syntax-table)

;;  Add the default extensions (and set up speedbar)
(ada-add-extensions ".ads" ".adb")
;; This two files are generated by GNAT when running with -gnatD
(if (equal ada-which-compiler 'gnat)
    (ada-add-extensions ".ads.dg" ".adb.dg"))

;;  Read the special cases for exceptions
(ada-case-read-exceptions)

;; include the other ada-mode files
(if (equal ada-which-compiler 'gnat)
    (progn
      ;; The order here is important: ada-xref defines the Project
      ;; submenu, and ada-prj adds to it.
      (require 'ada-xref)
      (condition-case nil  (require 'ada-prj) (error nil))
      ))
(condition-case nil (require 'ada-stmt) (error nil))

;;; provide ourselves
(provide 'ada-mode)

;;; ada-mode.el ends here