-;;; poe.el --- Portable Outfit for Emacsen; -*-byte-compile-dynamic: t;-*-
+;;; poe.el --- Portable Outfit for Emacsen
;; Copyright (C) 1995,1996,1997,1998,1999 Free Software Foundation, Inc.
;; Author: MORIOKA Tomohiko <tomo@m17n.org>
-;; Keywords: emulation, compatibility, NEmacs, MULE, Emacs/mule, XEmacs
+;; Shuhei KOBAYASHI <shuhei@aqua.ocn.ne.jp>
+;; Keywords: emulation, compatibility, Nemacs, MULE, Emacs/mule, XEmacs
;; This file is part of APEL (A Portable Emacs Library).
;;; Commentary:
-;; This modules does not includes MULE related features.
-;; MULE related features are supported by `poem'.
-
;;; Code:
(require 'product)
(product-provide (provide 'poe) (require 'apel-ver))
-(or (boundp 'current-load-list) (setq current-load-list nil))
+(require 'pym)
-(put 'defun-maybe 'lisp-indent-function 'defun)
-(defmacro defun-maybe (name &rest everything-else)
- "Define NAME as a function if NAME is not defined.
-See also the function `defun'."
- (or (and (fboundp name)
- (not (get name 'defun-maybe)))
- (` (or (fboundp (quote (, name)))
- (prog1
- (defun (, name) (,@ everything-else))
- ;; This `defun' will be compiled to `fset', which does
- ;; not update `load-history'.
- (setq current-load-list
- (cons (quote (, name)) current-load-list))
- (put (quote (, name)) 'defun-maybe t))))))
-
-(put 'defmacro-maybe 'lisp-indent-function 'defun)
-(defmacro defmacro-maybe (name &rest everything-else)
- "Define NAME as a macro if NAME is not defined.
-See also the function `defmacro'."
- (or (and (fboundp name)
- (not (get name 'defmacro-maybe)))
- (` (or (fboundp (quote (, name)))
- (prog1
- (defmacro (, name) (,@ everything-else))
- (setq current-load-list
- (cons (quote (, name)) current-load-list))
- (put (quote (, name)) 'defmacro-maybe t))))))
-
-(put 'defsubst-maybe 'lisp-indent-function 'defun)
-(defmacro defsubst-maybe (name &rest everything-else)
- "Define NAME as an inline function if NAME is not defined.
-See also the macro `defsubst'."
- (or (and (fboundp name)
- (not (get name 'defsubst-maybe)))
- (` (or (fboundp (quote (, name)))
- (prog1
- (defsubst (, name) (,@ everything-else))
- (setq current-load-list
- (cons (quote (, name)) current-load-list))
- (put (quote (, name)) 'defsubst-maybe t))))))
-
-(defmacro defalias-maybe (symbol definition)
- "Define SYMBOL as an alias for DEFINITION if SYMBOL is not defined.
-See also the function `defalias'."
- (setq symbol (eval symbol))
- (or (and (fboundp symbol)
- (not (get symbol 'defalias-maybe)))
- (` (or (fboundp (quote (, symbol)))
- (prog1
- (defalias (quote (, symbol)) (, definition))
- (setq current-load-list
- (cons (quote (, symbol)) current-load-list))
- (put (quote (, symbol)) 'defalias-maybe t))))))
-
-(defmacro defvar-maybe (name &rest everything-else)
- "Define NAME as a variable if NAME is not defined.
-See also the function `defvar'."
- (or (and (boundp name)
- (not (get name 'defvar-maybe)))
- (` (or (boundp (quote (, name)))
- (prog1
- (defvar (, name) (,@ everything-else))
- ;; byte-compiler will generate code to update
- ;; `load-history'.
- (put (quote (, name)) 'defvar-maybe t))))))
-
-(defmacro defconst-maybe (name &rest everything-else)
- "Define NAME as a constant variable if NAME is not defined.
-See also the function `defconst'."
- (or (and (boundp name)
- (not (get name 'defconst-maybe)))
- (` (or (boundp (quote (, name)))
- (prog1
- (defconst (, name) (,@ everything-else))
- ;; byte-compiler will generate code to update
- ;; `load-history'.
- (put (quote (, name)) 'defconst-maybe t))))))
-
-(defmacro defun-maybe-cond (name args &optional doc &rest everything-else)
- (or (stringp doc)
- (setq everything-else (cons doc everything-else)
- doc nil))
- (or (and (fboundp name)
- (not (get name 'defun-maybe)))
- (` (or (fboundp (quote (, name)))
- (prog1
- (cond
- (,@ (mapcar
- (function
- (lambda (case)
- (list (car case)
- (if doc
- (` (defun (, name) (, args)
- (, doc)
- (,@ (cdr case))))
- (` (defun (, name) (, args)
- (,@ (cdr case))))))))
- everything-else)))
- (setq current-load-list
- (cons (quote (, name)) current-load-list))
- (put (quote (, name)) 'defun-maybe t))))))
-
-(defmacro defmacro-maybe-cond (name args &optional doc &rest everything-else)
- (or (stringp doc)
- (setq everything-else (cons doc everything-else)
- doc nil))
- (or (and (fboundp name)
- (not (get name 'defmacro-maybe)))
- (` (or (fboundp (quote (, name)))
- (prog1
- (cond
- (,@ (mapcar
- (function
- (lambda (case)
- (list (car case)
- (if doc
- (` (defmacro (, name) (, args)
- (, doc)
- (,@ (cdr case))))
- (` (defmacro (, name) (, args)
- (,@ (cdr case))))))))
- everything-else)))
- (setq current-load-list
- (cons (quote (, name)) current-load-list))
- (put (quote (, name)) 'defmacro-maybe t))))))
-
-(defun subr-fboundp (symbol)
- "Return t if SYMBOL's function definition is a built-in function."
- (and (fboundp symbol)
- (subrp (symbol-function symbol))))
-
-(defconst-maybe emacs-major-version (string-to-int emacs-version))
-(defconst-maybe emacs-minor-version
- (string-to-int
- (substring emacs-version
- (string-match (format "%d\\." emacs-major-version)
- emacs-version))))
-
-(cond ((featurep 'xemacs)
- (require 'poe-xemacs)
- )
- ((string-match "XEmacs" emacs-version)
- (provide 'xemacs)
- (require 'poe-xemacs)
- )
- ((> emacs-major-version 20))
- ((= emacs-major-version 20)
- (cond ((subr-fboundp 'string)
- ;; Emacs 20.3 or later
- )
- ((subr-fboundp 'concat-chars)
- ;; Emacs 20.1 or later
- (defalias 'string 'concat-chars)
- ))
- )
- ((= emacs-major-version 19)
- ;; XXX: should do compile-time and load-time check before loading
- ;; "localhook". But, it is difficult since "localhook" is
- ;; already loaded via "install" at compile-time. any idea?
- (if (< emacs-minor-version 29)
- (require 'localhook)))
- (t
- (require 'poe-18)
- ;; XXX: should do compile-time and load-time check before loading
- ;; "localhook". But, it is difficult since "localhook" is
- ;; already loaded via "install" at compile-time. any idea?
- (require 'localhook)))
-
-;;; `eval-when-compile' is defined in "poe-18" under v18 with old compiler.
-(eval-when-compile (require 'static))
+;;; @ Version information.
+;;;
+
+;; v18 does not have many features we expect,
+;; notably `eval-when-compile' and `eval-and-compile'.
+(static-when (string= (substring emacs-version 0 2) "18")
+ (require 'poe-18))
+
+;; Now we can use them!
+(eval-and-compile
+ ;; We must define these two constants at compile-time as well as
+ ;; load-time since they are used for compile-time version checking.
+ (defconst-maybe emacs-major-version
+ (progn (string-match "^[0-9]+" emacs-version)
+ (string-to-int (substring emacs-version
+ (match-beginning 0)(match-end 0))))
+ "Major version number of this version of Emacs.")
+ (defconst-maybe emacs-minor-version
+ (progn (string-match "^[0-9]+\\.\\([0-9]+\\)" emacs-version)
+ (string-to-int (substring emacs-version
+ (match-beginning 1)(match-end 1))))
+ "Minor version number of this version of Emacs."))
+
+;; Some ancient version of XEmacs did not provide 'xemacs.
+(static-when (string-match "XEmacs" emacs-version)
+ (provide 'xemacs))
;; `file-coding' was appeared in the spring of 1998, just before XEmacs
-;; 21.0. Therefore it is not provided in XEmacs with MULE versions 20.4
+;; 21.0. Therefore it is not provided in XEmacs with MULE versions 20.4
;; or earlier.
-(if (and (featurep 'xemacs) (featurep 'mule))
- (provide 'file-coding))
-
-;; imported from emacs-20.3/lisp/emacs-lisp/edebug.el.
-;; `def-edebug-spec' is an autoloaded macro in v19 and later.
-(defmacro-maybe def-edebug-spec (symbol spec)
- "Set the edebug-form-spec property of SYMBOL according to SPEC.
-Both SYMBOL and SPEC are unevaluated. The SPEC can be 0, t, a symbol
-\(naming a function\), or a list."
- (` (put (quote (, symbol)) 'edebug-form-spec (quote (, spec)))))
-
-(def-edebug-spec defun-maybe defun)
-(def-edebug-spec defmacro-maybe defmacro)
-(def-edebug-spec defsubst-maybe defun)
-(def-edebug-spec defun-maybe-cond
- (&define name lambda-list
- [&optional stringp]
- [&rest ([¬ eval] [&rest sexp])]
- [&optional (eval [&optional ("interactive" interactive)] def-body)]
- &rest (&rest sexp)))
-(def-edebug-spec defmacro-maybe-cond
- (&define name lambda-list
- [&rest ([¬ eval] [&rest sexp])]
- [&optional (eval def-body)]
- &rest (&rest sexp)))
-
-;;; Emacs 20.1 emulation
-
-;; imported from emacs-20.3/lisp/subr.el.
-(defmacro-maybe when (cond &rest body)
- "If COND yields non-nil, do BODY, else return nil."
- (list 'if cond (cons 'progn body)))
-;; (def-edebug-spec when (&rest form))
+(static-when (featurep 'xemacs)
+ ;; must be load-time check to share .elc between w/ MULE and w/o MULE.
+ (when (featurep 'mule)
+ (provide 'file-coding)))
-;; imported from emacs-20.3/lisp/subr.el.
-(defmacro-maybe unless (cond &rest body)
- "If COND yields nil, do BODY, else return nil."
- (cons 'if (cons cond (cons nil body))))
-;; (def-edebug-spec unless (&rest form))
+(static-when (featurep 'xemacs)
+ (require 'poe-xemacs))
+;; must be load-time check to share .elc between different systems.
+(or (fboundp 'open-network-stream)
+ (require 'tcp))
+\f
-;;; @ Emacs 19.23 emulation
+;;; @ C primitives emulation.
;;;
+;; Emacs 20.3 and earlier: (require FEATURE &optional FILENAME)
+;; Emacs 20.4 and later: (require FEATURE &optional FILENAME NOERROR)
+(static-condition-case nil
+ ;; compile-time check.
+ (progn
+ (require 'nofeature "nofile" 'noerror)
+ (if (get 'require 'defun-maybe)
+ (error ""))) ; already redefined.
+ (error
+ ;; load-time check.
+ (or (fboundp 'si:require)
+ (progn
+ (fset 'si:require (symbol-function 'require))
+ (put 'require 'defun-maybe t)
+ (defun require (feature &optional filename noerror)
+ "\
+If feature FEATURE is not loaded, load it from FILENAME.
+If FEATURE is not a member of the list `features', then the feature
+is not loaded; so load the file FILENAME.
+If FILENAME is omitted, the printname of FEATURE is used as the file name,
+but in this case `load' insists on adding the suffix `.el' or `.elc'.
+If the optional third argument NOERROR is non-nil,
+then return nil if the file is not found.
+Normally the return value is FEATURE."
+ (if noerror
+ (condition-case nil
+ (si:require feature filename)
+ (error))
+ (si:require feature filename)))))))
+
+;; Emacs 19.29 and later: (plist-get PLIST PROP)
+;; (defun-maybe plist-get (plist prop)
+;; (while (and plist
+;; (not (eq (car plist) prop)))
+;; (setq plist (cdr (cdr plist))))
+;; (car (cdr plist)))
+(static-unless (and (fboundp 'plist-get)
+ (not (get 'plist-get 'defun-maybe)))
+ (or (fboundp 'plist-get)
+ (progn
+ (defvar plist-get-internal-symbol)
+ (defun plist-get (plist prop)
+ "\
+Extract a value from a property list.
+PLIST is a property list, which is a list of the form
+\(PROP1 VALUE1 PROP2 VALUE2...\). This function returns the value
+corresponding to the given PROP, or nil if PROP is not
+one of the properties on the list."
+ (setplist 'plist-get-internal-symbol plist)
+ (get 'plist-get-internal-symbol prop))
+ ;; for `load-history'.
+ (setq current-load-list (cons 'plist-get current-load-list))
+ (put 'plist-get 'defun-maybe t))))
+
+;; Emacs 19.29 and later: (plist-put PLIST PROP VAL)
+;; (defun-maybe plist-put (plist prop val)
+;; (catch 'found
+;; (let ((tail plist)
+;; (prev nil))
+;; (while (and tail (cdr tail))
+;; (if (eq (car tail) prop)
+;; (progn
+;; (setcar (cdr tail) val)
+;; (throw 'found plist))
+;; (setq prev tail
+;; tail (cdr (cdr tail)))))
+;; (if prev
+;; (progn
+;; (setcdr (cdr prev) (list prop val))
+;; plist)
+;; (list prop val)))))
+(static-unless (and (fboundp 'plist-put)
+ (not (get 'plist-put 'defun-maybe)))
+ (or (fboundp 'plist-put)
+ (progn
+ (defvar plist-put-internal-symbol)
+ (defun plist-put (plist prop val)
+ "\
+Change value in PLIST of PROP to VAL.
+PLIST is a property list, which is a list of the form
+\(PROP1 VALUE1 PROP2 VALUE2 ...\). PROP is a symbol and VAL is any object.
+If PROP is already a property on the list, its value is set to VAL,
+otherwise the new PROP VAL pair is added. The new plist is returned;
+use `\(setq x \(plist-put x prop val\)\)' to be sure to use the new value.
+The PLIST is modified by side effects."
+ (setplist 'plist-put-internal-symbol plist)
+ (put 'plist-put-internal-symbol prop val)
+ (symbol-plist 'plist-put-internal-symbol))
+ ;; for `load-history'.
+ (setq current-load-list (cons 'plist-put current-load-list))
+ (put 'plist-put 'defun-maybe t))))
+
+;; Emacs 19.23 and later: (minibuffer-prompt-width)
(defun-maybe minibuffer-prompt-width ()
"Return the display width of the minibuffer prompt."
(save-excursion
(set-buffer (window-buffer (minibuffer-window)))
(current-column)))
-
-;;; @ Emacs 19.29 emulation
-;;;
-
-(defvar-maybe path-separator ":"
- "The directory separator in search paths, as a string.")
-
-(defun-maybe buffer-substring-no-properties (start end)
- "Return the characters of part of the buffer, without the text properties.
-The two arguments START and END are character positions;
-they can be in either order.
-\[Emacs 19.29 emulating function]"
- (let ((string (buffer-substring start end)))
- (set-text-properties 0 (length string) nil string)
- string))
-
-;; imported from emacs-19.34/lisp/subr.el.
-(defun-maybe match-string (num &optional string)
- "Return string of text matched by last search.
-NUM specifies which parenthesized expression in the last regexp.
- Value is nil if NUMth pair didn't match, or there were less than NUM pairs.
-Zero means the entire text matched by the whole regexp or whole string.
-STRING should be given if the last search was by `string-match' on STRING.
-\[Emacs 19.29 emulating function]"
- (if (match-beginning num)
- (if string
- (substring string (match-beginning num) (match-end num))
- (buffer-substring (match-beginning num) (match-end num)))))
-
+;; (read-string PROMPT &optional INITIAL-INPUT HISTORY)
+;; Emacs 19.29/XEmacs 19.14(?) and later takes optional 3rd arg HISTORY.
(static-unless (or (featurep 'xemacs)
(>= emacs-major-version 20)
(and (= emacs-major-version 19)
(>= emacs-minor-version 29)))
- ;; for Emacs 19.28 or earlier
- (unless (fboundp 'si:read-string)
- (fset 'si:read-string (symbol-function 'read-string))
- (defun read-string (prompt &optional initial-input history)
- "Read a string from the minibuffer, prompting with string PROMPT.
+ (or (fboundp 'si:read-string)
+ (progn
+ (fset 'si:read-string (symbol-function 'read-string))
+ (defun read-string (prompt &optional initial-input history)
+ "\
+Read a string from the minibuffer, prompting with string PROMPT.
If non-nil, second arg INITIAL-INPUT is a string to insert before reading.
The third arg HISTORY, is dummy for compatibility.
See `read-from-minibuffer' for details of HISTORY argument."
- (si:read-string prompt initial-input))
- ))
-
-(defun-maybe rassoc (key list)
- "Return non-nil if KEY is `equal' to the cdr of an element of LIST.
-The value is actually the element of LIST whose cdr equals KEY.
-Elements of LIST that are not conses are ignored.
-\[Emacs 19.29 emulating function]"
- (catch 'found
- (while list
- (cond ((not (consp (car list))))
- ((equal (cdr (car list)) key)
- (throw 'found (car list)) ))
- (setq list (cdr list)) )))
-
-;; imported from emacs-19.34/lisp/files.el.
-(defun-maybe file-name-sans-extension (filename)
- "Return FILENAME sans final \"extension\".
-The extension, in a file name, is the part that follows the last `.'.
-\[Emacs 19.29 emulating function]"
- (save-match-data
- (let ((file (file-name-sans-versions (file-name-nondirectory filename)))
- directory)
- (if (string-match "\\.[^.]*\\'" file)
- (if (setq directory (file-name-directory filename))
- (expand-file-name (substring file 0 (match-beginning 0))
- directory)
- (substring file 0 (match-beginning 0)))
- filename))))
-
-
-;;; @ Emacs 19.30 emulation
-;;;
-
-;; imported from emacs-19.34/lisp/subr.el.
-(defun-maybe add-to-list (list-var element)
- "Add to the value of LIST-VAR the element ELEMENT if it isn't there yet.
-The test for presence of ELEMENT is done with `equal'.
-If you want to use `add-to-list' on a variable that is not defined
-until a certain package is loaded, you should put the call to `add-to-list'
-into a hook function that will be run only after loading the package.
-`eval-after-load' provides one way to do this. In some cases
-other hooks, such as major mode hooks, can do the job.
-\[Emacs 19.30 emulating function]"
- (or (member element (symbol-value list-var))
- (set list-var (cons element (symbol-value list-var)))))
-
-(cond ((fboundp 'insert-file-contents-literally))
- ((boundp 'file-name-handler-alist)
- (defun insert-file-contents-literally
- (filename &optional visit beg end replace)
- "Like `insert-file-contents', q.v., but only reads in the file.
-A buffer may be modified in several ways after reading into the buffer due
-to advanced Emacs features, such as file-name-handlers, format decoding,
-find-file-hooks, etc.
- This function ensures that none of these modifications will take place.
-\[Emacs 19.30 emulating function]"
- (let (file-name-handler-alist)
- (insert-file-contents filename visit beg end replace)))
- )
- (t
- (defalias 'insert-file-contents-literally 'insert-file-contents)
- ))
-
-
-;;; @ Emacs 19.31 emulation
-;;;
-
-(defun-maybe buffer-live-p (object)
- "Return non-nil if OBJECT is a buffer which has not been killed.
-Value is nil if OBJECT is not a buffer or if it has been killed.
-\[Emacs 19.31 emulating function]"
- (and object
- (get-buffer object)
- (buffer-name (get-buffer object))
- t))
-
-;; imported from emacs-19.34/lisp/window.el.
-(defmacro-maybe save-selected-window (&rest body)
- "Execute BODY, then select the window that was selected before BODY.
-\[Emacs 19.31 emulating function]"
- (list 'let
- '((save-selected-window-window (selected-window)))
- (list 'unwind-protect
- (cons 'progn body)
- (list 'select-window 'save-selected-window-window))))
-
-(defun-maybe-cond convert-standard-filename (filename)
- "Convert a standard file's name to something suitable for the current OS.
-This function's standard definition is trivial; it just returns the argument.
-However, on some systems, the function is redefined
-with a definition that really does change some file names.
-Under `windows-nt' or `ms-dos', it refers `filename-replacement-alist' and
-`filename-limit-length' for the basic filename and each parent directory name.
-\[Emacs 19.31 emulating function]"
- ((memq system-type '(windows-nt ms-dos))
- (require 'filename)
- (let* ((names (split-string filename "/"))
- (drive-name (car names))
- (filter (function (lambda (string)
- (filename-maybe-truncate-by-size
- (filename-special-filter string))))))
- (cond ((eq 1 (length names))
- (funcall filter drive-name))
- ((string-match "^[^/]:$" drive-name)
- (concat drive-name "/" (mapconcat filter (cdr names) "/")))
- (t (mapconcat filter names "/")))))
- (t filename))
-
-
-;;; @ Emacs 20.1 emulation
-;;;
-
-;; imported from emacs-20.3/lisp/subr.el.
-(defsubst-maybe caar (x)
- "Return the car of the car of X."
- (car (car x)))
-
-;; imported from emacs-20.3/lisp/subr.el.
-(defsubst-maybe cadr (x)
- "Return the car of the cdr of X."
- (car (cdr x)))
-
-;; imported from emacs-20.3/lisp/subr.el.
-(defsubst-maybe cdar (x)
- "Return the cdr of the car of X."
- (cdr (car x)))
-
-;; imported from emacs-20.3/lisp/subr.el.
-(defsubst-maybe cddr (x)
- "Return the cdr of the cdr of X."
- (cdr (cdr x)))
-
-;; imported from emacs-20.3/lisp/subr.el.
-(defun-maybe last (x &optional n)
- "Return the last link of the list X. Its car is the last element.
-If X is nil, return nil.
-If N is non-nil, return the Nth-to-last link of X.
-If N is bigger than the length of X, return X."
- (if n
- (let ((m 0) (p x))
- (while (consp p)
- (setq m (1+ m) p (cdr p)))
- (if (<= n 0) p
- (if (< n m) (nthcdr (- m n) x) x)))
- (while (cdr x)
- (setq x (cdr x)))
- x))
-
-;; In Emacs 20.3, save-current-buffer is defined in src/editfns.c.
-(defmacro-maybe save-current-buffer (&rest body)
- "Save the current buffer; execute BODY; restore the current buffer.
-Executes BODY just like `progn'."
- (` (let ((orig-buffer (current-buffer)))
- (unwind-protect
- (progn (,@ body))
- (if (buffer-live-p orig-buffer)
- (set-buffer orig-buffer))))))
-
-;; imported from emacs-20.3/lisp/subr.el. (with macro style change)
-(defmacro-maybe with-current-buffer (buffer &rest body)
- "Execute the forms in BODY with BUFFER as the current buffer.
-The value returned is the value of the last form in BODY.
-See also `with-temp-buffer'."
- (` (save-current-buffer
- (set-buffer (, buffer))
- (,@ body))))
-
-;; imported from emacs-20.3/lisp/subr.el. (with macro style change)
-(defmacro-maybe with-temp-file (file &rest forms)
- "Create a new buffer, evaluate FORMS there, and write the buffer to FILE.
-The value of the last form in FORMS is returned, like `progn'.
-See also `with-temp-buffer'."
- (let ((temp-file (make-symbol "temp-file"))
- (temp-buffer (make-symbol "temp-buffer")))
- (` (let (((, temp-file) (, file))
- ((, temp-buffer)
- (get-buffer-create (generate-new-buffer-name " *temp file*"))))
- (unwind-protect
- (prog1
- (with-current-buffer (, temp-buffer)
- (,@ forms))
- (with-current-buffer (, temp-buffer)
- (widen)
- (write-region (point-min) (point-max) (, temp-file) nil 0)))
- (and (buffer-name (, temp-buffer))
- (kill-buffer (, temp-buffer))))))))
-
-;; imported from emacs-20.3/lisp/subr.el. (with macro style change)
-(defmacro-maybe with-temp-buffer (&rest forms)
- "Create a temporary buffer, and evaluate FORMS there like `progn'.
-See also `with-temp-file' and `with-output-to-string'."
- (let ((temp-buffer (make-symbol "temp-buffer")))
- (` (let (((, temp-buffer)
- (get-buffer-create (generate-new-buffer-name " *temp*"))))
- (unwind-protect
- (with-current-buffer (, temp-buffer)
- (,@ forms))
- (and (buffer-name (, temp-buffer))
- (kill-buffer (, temp-buffer))))))))
-
-(defmacro-maybe combine-after-change-calls (&rest body)
- "Execute BODY."
- (cons 'progn body))
-
-;; imported from emacs-20.3/lisp/subr.el.
-(defun-maybe functionp (object)
- "Non-nil if OBJECT is a type of object that can be called as a function."
- (or (subrp object) (byte-code-function-p object)
- (eq (car-safe object) 'lambda)
- (and (symbolp object) (fboundp object))))
-
-;; imported from emacs-20.3/lisp/emacs-lisp/cl.el.
-(defun-maybe butlast (x &optional n)
- "Returns a copy of LIST with the last N elements removed."
- (if (and n (<= n 0)) x
- (nbutlast (copy-sequence x) n)))
-
-;; imported from emacs-20.3/lisp/emacs-lisp/cl.el.
-(defun-maybe nbutlast (x &optional n)
- "Modifies LIST to remove the last N elements."
- (let ((m (length x)))
- (or n (setq n 1))
- (and (< n m)
- (progn
- (if (> n 0) (setcdr (nthcdr (- (1- m) n) x) nil))
- x))))
-
-;; imported from XEmacs 21.
-(defun-maybe split-string (string &optional pattern)
- "Return a list of substrings of STRING which are separated by PATTERN.
-If PATTERN is omitted, it defaults to \"[ \\f\\t\\n\\r\\v]+\"."
- (or pattern
- (setq pattern "[ \f\t\n\r\v]+"))
- ;; The FSF version of this function takes care not to cons in case
- ;; of infloop. Maybe we should synch?
- (let (parts (start 0))
- (while (string-match pattern string start)
- (setq parts (cons (substring string start (match-beginning 0)) parts)
- start (match-end 0)))
- (nreverse (cons (substring string start) parts))))
-
-;; emulating char-before of Emacs 20.
+ (si:read-string prompt initial-input)))))
+
+;; v18: (string-to-int STRING)
+;; v19: (string-to-number STRING)
+;; v20: (string-to-number STRING &optional BASE)
+;;
+;; XXX: `string-to-number' of Emacs 20.3 and earlier is broken.
+;; (string-to-number "1e1" 16) => 10.0, should be 481.
+(static-condition-case nil
+ ;; compile-time check.
+ (if (= (string-to-number "1e1" 16) 481)
+ (if (get 'string-to-number 'defun-maybe)
+ (error "")) ; already redefined.
+ (error "")) ; Emacs 20.3 and ealier.
+ (error
+ ;; load-time check.
+ (or (fboundp 'si:string-to-number)
+ (progn
+ (if (fboundp 'string-to-number)
+ (fset 'si:string-to-number (symbol-function 'string-to-number))
+ (fset 'si:string-to-number (symbol-function 'string-to-int))
+ ;; XXX: In v18, this causes infinite loop while bytecompiling.
+ ;; (defalias 'string-to-int 'string-to-number)
+ )
+ (put 'string-to-number 'defun-maybe t)
+ (defun string-to-number (string &optional base)
+ "\
+Convert STRING to a number by parsing it as a decimal number.
+This parses both integers and floating point numbers.
+It ignores leading spaces and tabs.
+
+If BASE, interpret STRING as a number in that base. If BASE isn't
+present, base 10 is used. BASE must be between 2 and 16 (inclusive).
+If the base used is not 10, floating point is not recognized."
+ (if (or (null base) (= base 10))
+ (si:string-to-number string)
+ (if (or (< base 2)(> base 16))
+ (signal 'args-out-of-range (cons base nil)))
+ (let ((len (length string))
+ (pos 0))
+ ;; skip leading whitespace.
+ (while (and (< pos len)
+ (memq (aref string pos) '(?\ ?\t)))
+ (setq pos (1+ pos)))
+ (if (= pos len)
+ 0
+ (let ((number 0)(negative 1)
+ chr num)
+ (if (eq (aref string pos) ?-)
+ (setq negative -1
+ pos (1+ pos))
+ (if (eq (aref string pos) ?+)
+ (setq pos (1+ pos))))
+ (while (and (< pos len)
+ (setq chr (aref string pos)
+ num (cond
+ ((and (<= ?0 chr)(<= chr ?9))
+ (- chr ?0))
+ ((and (<= ?A chr)(<= chr ?F))
+ (+ (- chr ?A) 10))
+ ((and (<= ?a chr)(<= chr ?f))
+ (+ (- chr ?a) 10))
+ (t nil)))
+ (< num base))
+ (setq number (+ (* number base) num)
+ pos (1+ pos)))
+ (* negative number))))))))))
+
+;; Emacs 20.1 and 20.2: (concat-chars &rest CHARS)
+;; Emacs 20.3/XEmacs 21.0 and later: (string &rest CHARS)
+(static-cond
+ ((and (fboundp 'string)
+ (subrp (symbol-function 'string)))
+ ;; Emacs 20.3/XEmacs 21.0 and later.
+ )
+ ((and (fboundp 'concat-chars)
+ (subrp (symbol-function 'concat-chars)))
+ ;; Emacs 20.1 and 20.2.
+ (defalias 'string 'concat-chars))
+ (t
+ ;; Use `defun-maybe' to update `load-history'.
+ (defun-maybe string (&rest chars)
+ "Concatenate all the argument characters and make the result a string."
+ ;; We cannot use (apply 'concat chars) here because `concat' does not
+ ;; work with multibyte chars on Mule 1.* and 2.*.
+ (mapconcat (function char-to-string) chars ""))))
+
+;; Mule: (char-before POS)
+;; v20: (char-before &optional POS)
(static-condition-case nil
;; compile-time check.
(progn
- ;; XXX: this file is already loaded at compile-time,
- ;; so this test will always success.
(char-before)
- ;; If our definition is found at compile-time, signal an error.
- ;; XXX: should signal more specific error.
(if (get 'char-before 'defun-maybe)
- (error "")))
- (wrong-number-of-arguments ; Mule 1.*, 2.*.
+ (error ""))) ; already defined.
+ (wrong-number-of-arguments ; Mule.
;; load-time check.
(or (fboundp 'si:char-before)
(progn
;; load-time check.
(condition-case nil
(char-before)
- (wrong-number-of-arguments ; Mule 1.*, 2.*.
+ (wrong-number-of-arguments ; Mule.
(or (fboundp 'si:char-before)
(progn
(fset 'si:char-before (symbol-function 'char-before))
(and (not (bobp))
(preceding-char))))))))
-;; emulating char-after of Emacs 20.
+;; v18, v19: (char-after POS)
+;; v20: (char-after &optional POS)
(static-condition-case nil
;; compile-time check.
(progn
- ;; XXX: this file is already loaded at compile-time,
- ;; so this test will always success.
(char-after)
- ;; If our definition is found at compile-time, signal an error.
- ;; XXX: should signal more specific error.
(if (get 'char-after 'defun-maybe)
- (error "")))
+ (error ""))) ; already defined.
(wrong-number-of-arguments ; v18, v19
;; load-time check.
(or (fboundp 'si:char-after)
(and (not (eobp))
(following-char))))))))
+;; Emacs 19.29 and later: (buffer-substring-no-properties START END)
+(defun-maybe buffer-substring-no-properties (start end)
+ "Return the characters of part of the buffer, without the text properties.
+The two arguments START and END are character positions;
+they can be in either order."
+ (let ((string (buffer-substring start end)))
+ (set-text-properties 0 (length string) nil string)
+ string))
-;;; @ Emacs 20.3 emulation
-;;;
-
-;; imported from emacs-20.3/lisp/files.el.
-(defvar-maybe temporary-file-directory
- (file-name-as-directory
- (cond ((memq system-type '(ms-dos windows-nt))
- (or (getenv "TEMP") (getenv "TMPDIR") (getenv "TMP") "c:/temp"))
- ((memq system-type '(vax-vms axp-vms))
- (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "SYS$SCRATCH:"))
- (t
- (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "/tmp"))))
- "The directory for writing temporary files.")
+;; Emacs 19.31 and later: (buffer-live-p OBJECT)
+(defun-maybe buffer-live-p (object)
+ "Return non-nil if OBJECT is a buffer which has not been killed.
+Value is nil if OBJECT is not a buffer or if it has been killed."
+ (and object
+ (get-buffer object)
+ (buffer-name (get-buffer object))
+ t))
+;; Emacs 20: (line-beginning-position &optional N)
(defun-maybe line-beginning-position (&optional n)
"Return the character position of the first character on the current line.
With argument N not nil or 1, move forward N - 1 lines first.
(forward-line (1- (or n 1)))
(point)))
+;; Emacs 20: (line-end-position &optional N)
(defun-maybe line-end-position (&optional n)
"Return the character position of the last character on the current line.
With argument N not nil or 1, move forward N - 1 lines first.
(save-excursion
(end-of-line (or n 1))
(point)))
+\f
+
+;;; @ Basic lisp subroutines emulation. (lisp/subr.el)
+;;;
+
+;;; @@ Lisp language features.
+
+(defmacro-maybe push (newelt listname)
+ "Add NEWELT to the list stored in the symbol LISTNAME.
+This is equivalent to (setq LISTNAME (cons NEWELT LISTNAME)).
+LISTNAME must be a symbol."
+ (list 'setq listname
+ (list 'cons newelt listname)))
+
+(defmacro-maybe pop (listname)
+ "Return the first element of LISTNAME's value, and remove it from the list.
+LISTNAME must be a symbol whose value is a list.
+If the value is nil, `pop' returns nil but does not actually
+change the list."
+ (list 'prog1 (list 'car listname)
+ (list 'setq listname (list 'cdr listname))))
+
+(defmacro-maybe when (cond &rest body)
+ "If COND yields non-nil, do BODY, else return nil."
+ (list 'if cond (cons 'progn body)))
+;; (def-edebug-spec when (&rest form))
+
+(defmacro-maybe unless (cond &rest body)
+ "If COND yields nil, do BODY, else return nil."
+ (cons 'if (cons cond (cons nil body))))
+;; (def-edebug-spec unless (&rest form))
+
+(defsubst-maybe caar (x)
+ "Return the car of the car of X."
+ (car (car x)))
+
+(defsubst-maybe cadr (x)
+ "Return the car of the cdr of X."
+ (car (cdr x)))
+
+(defsubst-maybe cdar (x)
+ "Return the cdr of the car of X."
+ (cdr (car x)))
+
+(defsubst-maybe cddr (x)
+ "Return the cdr of the cdr of X."
+ (cdr (cdr x)))
+
+(defun-maybe last (x &optional n)
+ "Return the last link of the list X. Its car is the last element.
+If X is nil, return nil.
+If N is non-nil, return the Nth-to-last link of X.
+If N is bigger than the length of X, return X."
+ (if n
+ (let ((m 0) (p x))
+ (while (consp p)
+ (setq m (1+ m) p (cdr p)))
+ (if (<= n 0) p
+ (if (< n m) (nthcdr (- m n) x) x)))
+ (while (cdr x)
+ (setq x (cdr x)))
+ x))
+
+;; Actually, `butlast' and `nbutlast' are defined in lisp/cl.el.
+(defun-maybe butlast (x &optional n)
+ "Returns a copy of LIST with the last N elements removed."
+ (if (and n (<= n 0)) x
+ (nbutlast (copy-sequence x) n)))
+
+(defun-maybe nbutlast (x &optional n)
+ "Modifies LIST to remove the last N elements."
+ (let ((m (length x)))
+ (or n (setq n 1))
+ (and (< n m)
+ (progn
+ (if (> n 0) (setcdr (nthcdr (- (1- m) n) x) nil))
+ x))))
+
+;; Emacs 20.3 and later: (assoc-default KEY ALIST &optional TEST DEFAULT)
+(defun-maybe assoc-default (key alist &optional test default)
+ "Find object KEY in a pseudo-alist ALIST.
+ALIST is a list of conses or objects. Each element (or the element's car,
+if it is a cons) is compared with KEY by evaluating (TEST (car elt) KEY).
+If that is non-nil, the element matches;
+then `assoc-default' returns the element's cdr, if it is a cons,
+or DEFAULT if the element is not a cons.
+
+If no element matches, the value is nil.
+If TEST is omitted or nil, `equal' is used."
+ (let (found (tail alist) value)
+ (while (and tail (not found))
+ (let ((elt (car tail)))
+ (when (funcall (or test 'equal) (if (consp elt) (car elt) elt) key)
+ (setq found t value (if (consp elt) (cdr elt) default))))
+ (setq tail (cdr tail)))
+ value))
+
+;; The following two function use `compare-strings', which we don't
+;; support yet.
+;; (defun assoc-ignore-case (key alist))
+;; (defun assoc-ignore-representation (key alist))
+
+;; Emacs 19.29/XEmacs 19.14(?) and later: (rassoc KEY LIST)
+;; Actually, `rassoc' is defined in src/fns.c.
+(defun-maybe rassoc (key list)
+ "Return non-nil if KEY is `equal' to the cdr of an element of LIST.
+The value is actually the element of LIST whose cdr equals KEY.
+Elements of LIST that are not conses are ignored."
+ (catch 'found
+ (while list
+ (cond ((not (consp (car list))))
+ ((equal (cdr (car list)) key)
+ (throw 'found (car list))))
+ (setq list (cdr list)))))
+
+;;; @@ Hook manipulation functions.
+
+;; "localhook" package is written for Emacs 19.28 and earlier.
+;; `run-hooks' was a lisp function in Emacs 19.29 and earlier.
+;; So, in Emacs 19.29, `run-hooks' and others will be overrided.
+;; But, who cares it?
+(static-unless (subrp (symbol-function 'run-hooks))
+ (require 'localhook))
+
+;; Emacs 19.29/XEmacs 19.14(?) and later: (add-to-list LIST-VAR ELEMENT)
+(defun-maybe add-to-list (list-var element)
+ "Add to the value of LIST-VAR the element ELEMENT if it isn't there yet.
+The test for presence of ELEMENT is done with `equal'.
+If you want to use `add-to-list' on a variable that is not defined
+until a certain package is loaded, you should put the call to `add-to-list'
+into a hook function that will be run only after loading the package.
+`eval-after-load' provides one way to do this. In some cases
+other hooks, such as major mode hooks, can do the job."
+ (or (member element (symbol-value list-var))
+ (set list-var (cons element (symbol-value list-var)))))
+
+;; (eval-after-load FILE FORM)
+;; Emacs 19.28 and earlier do not evaluate FORM if FILE is already loaded.
+;; XEmacs 20.2 and earlier have `after-load-alist', but refuse to support
+;; `eval-after-load'. (see comments in XEmacs/lisp/subr.el.)
+(static-cond
+ ((featurep 'xemacs)
+ ;; for XEmacs 20.2 and earlier.
+ (defun-maybe eval-after-load (file form)
+ "Arrange that, if FILE is ever loaded, FORM will be run at that time.
+This makes or adds to an entry on `after-load-alist'.
+If FILE is already loaded, evaluate FORM right now.
+It does nothing if FORM is already on the list for FILE.
+FILE should be the name of a library, with no directory name."
+ ;; Make sure there is an element for FILE.
+ (or (assoc file after-load-alist)
+ (setq after-load-alist (cons (list file) after-load-alist)))
+ ;; Add FORM to the element if it isn't there.
+ (let ((elt (assoc file after-load-alist)))
+ (or (member form (cdr elt))
+ (progn
+ (nconc elt (list form))
+ ;; If the file has been loaded already, run FORM right away.
+ (and (assoc file load-history)
+ (eval form)))))
+ form))
+ ((>= emacs-major-version 20))
+ ((and (= emacs-major-version 19)
+ (< emacs-minor-version 29))
+ ;; for Emacs 19.28 and earlier.
+ (defun eval-after-load (file form)
+ "Arrange that, if FILE is ever loaded, FORM will be run at that time.
+This makes or adds to an entry on `after-load-alist'.
+If FILE is already loaded, evaluate FORM right now.
+It does nothing if FORM is already on the list for FILE.
+FILE should be the name of a library, with no directory name."
+ ;; Make sure there is an element for FILE.
+ (or (assoc file after-load-alist)
+ (setq after-load-alist (cons (list file) after-load-alist)))
+ ;; Add FORM to the element if it isn't there.
+ (let ((elt (assoc file after-load-alist)))
+ (or (member form (cdr elt))
+ (progn
+ (nconc elt (list form))
+ ;; If the file has been loaded already, run FORM right away.
+ (and (assoc file load-history)
+ (eval form)))))
+ form))
+ (t
+ ;; should emulate for v18?
+ ))
+
+(defun-maybe eval-next-after-load (file)
+ "Read the following input sexp, and run it whenever FILE is loaded.
+This makes or adds to an entry on `after-load-alist'.
+FILE should be the name of a library, with no directory name."
+ (eval-after-load file (read)))
+
+;;; @@ Input and display facilities.
+
+;; XXX: (defun read-passwd (prompt &optional confirm default))
+
+;;; @@ Miscellanea.
+
+;; Avoid compiler warnings about this variable,
+;; which has a special meaning on certain system types.
+(defvar-maybe buffer-file-type nil
+ "Non-nil if the visited file is a binary file.
+This variable is meaningful on MS-DOG and Windows NT.
+On those systems, it is automatically local in every buffer.
+On other systems, this variable is normally always nil.")
+
+;; Emacs 20.1/XEmacs 20.3(?) and later: (save-current-buffer &rest BODY)
+;;
+;; v20 defines `save-current-buffer' as a C primitive (in src/editfns.c)
+;; and introduces a new bytecode Bsave_current_buffer(_1), replacing an
+;; obsolete bytecode Bread_char. To make things worse, Emacs 20.1 and
+;; 20.2 have a bug that it will restore the current buffer without
+;; confirming that it is alive.
+;;
+;; This is a source of incompatibility of .elc between v18/v19 and v20.
+;; (XEmacs compiler takes care of it if compatibility mode is enabled.)
+(defmacro-maybe save-current-buffer (&rest body)
+ "Save the current buffer; execute BODY; restore the current buffer.
+Executes BODY just like `progn'."
+ (` (let ((orig-buffer (current-buffer)))
+ (unwind-protect
+ (progn (,@ body))
+ (if (buffer-live-p orig-buffer)
+ (set-buffer orig-buffer))))))
+
+;; Emacs 20.1/XEmacs 20.3(?) and later: (with-current-buffer BUFFER &rest BODY)
+(defmacro-maybe with-current-buffer (buffer &rest body)
+ "Execute the forms in BODY with BUFFER as the current buffer.
+The value returned is the value of the last form in BODY.
+See also `with-temp-buffer'."
+ (` (save-current-buffer
+ (set-buffer (, buffer))
+ (,@ body))))
+
+;; Emacs 20.1/XEmacs 20.3(?) and later: (with-temp-file FILE &rest FORMS)
+(defmacro-maybe with-temp-file (file &rest forms)
+ "Create a new buffer, evaluate FORMS there, and write the buffer to FILE.
+The value of the last form in FORMS is returned, like `progn'.
+See also `with-temp-buffer'."
+ (let ((temp-file (make-symbol "temp-file"))
+ (temp-buffer (make-symbol "temp-buffer")))
+ (` (let (((, temp-file) (, file))
+ ((, temp-buffer)
+ (get-buffer-create (generate-new-buffer-name " *temp file*"))))
+ (unwind-protect
+ (prog1
+ (with-current-buffer (, temp-buffer)
+ (,@ forms))
+ (with-current-buffer (, temp-buffer)
+ (widen)
+ (write-region (point-min) (point-max) (, temp-file) nil 0)))
+ (and (buffer-name (, temp-buffer))
+ (kill-buffer (, temp-buffer))))))))
+
+;; Emacs 20.4 and later: (with-temp-message MESSAGE &rest BODY)
+;; This macro uses `current-message', which appears in v20.
+(static-when (and (fboundp 'current-message)
+ (subrp (symbol-function 'current-message)))
+ (defmacro-maybe with-temp-message (message &rest body)
+ "\
+Display MESSAGE temporarily if non-nil while BODY is evaluated.
+The original message is restored to the echo area after BODY has finished.
+The value returned is the value of the last form in BODY.
+MESSAGE is written to the message log buffer if `message-log-max' is non-nil.
+If MESSAGE is nil, the echo area and message log buffer are unchanged.
+Use a MESSAGE of \"\" to temporarily clear the echo area."
+ (let ((current-message (make-symbol "current-message"))
+ (temp-message (make-symbol "with-temp-message")))
+ (` (let (((, temp-message) (, message))
+ ((, current-message)))
+ (unwind-protect
+ (progn
+ (when (, temp-message)
+ (setq (, current-message) (current-message))
+ (message "%s" (, temp-message))
+ (,@ body))
+ (and (, temp-message) (, current-message)
+ (message "%s" (, current-message))))))))))
+
+;; Emacs 20.1/XEmacs 20.3(?) and later: (with-temp-buffer &rest FORMS)
+(defmacro-maybe with-temp-buffer (&rest forms)
+ "Create a temporary buffer, and evaluate FORMS there like `progn'.
+See also `with-temp-file' and `with-output-to-string'."
+ (let ((temp-buffer (make-symbol "temp-buffer")))
+ (` (let (((, temp-buffer)
+ (get-buffer-create (generate-new-buffer-name " *temp*"))))
+ (unwind-protect
+ (with-current-buffer (, temp-buffer)
+ (,@ forms))
+ (and (buffer-name (, temp-buffer))
+ (kill-buffer (, temp-buffer))))))))
+
+;; Emacs 20.1/XEmacs 20.3(?) and later: (with-output-to-string &rest BODY)
+(defmacro-maybe with-output-to-string (&rest body)
+ "Execute BODY, return the text it sent to `standard-output', as a string."
+ (` (let ((standard-output
+ (get-buffer-create (generate-new-buffer-name " *string-output*"))))
+ (let ((standard-output standard-output))
+ (,@ body))
+ (with-current-buffer standard-output
+ (prog1
+ (buffer-string)
+ (kill-buffer nil))))))
+
+;; Emacs 20.1 and later: (combine-after-change-calls &rest BODY)
+(defmacro-maybe combine-after-change-calls (&rest body)
+ "Execute BODY, but don't call the after-change functions till the end.
+If BODY makes changes in the buffer, they are recorded
+and the functions on `after-change-functions' are called several times
+when BODY is finished.
+The return value is the value of the last form in BODY.
+
+If `before-change-functions' is non-nil, then calls to the after-change
+functions can't be deferred, so in that case this macro has no effect.
+
+Do not alter `after-change-functions' or `before-change-functions'
+in BODY.
+
+This emulating macro does not support after-change functions at all,
+just execute BODY."
+ (cons 'progn body))
+
+;; Emacs 19.29/XEmacs 19.14(?) and later: (match-string NUM &optional STRING)
+(defun-maybe match-string (num &optional string)
+ "Return string of text matched by last search.
+NUM specifies which parenthesized expression in the last regexp.
+ Value is nil if NUMth pair didn't match, or there were less than NUM pairs.
+Zero means the entire text matched by the whole regexp or whole string.
+STRING should be given if the last search was by `string-match' on STRING."
+ (if (match-beginning num)
+ (if string
+ (substring string (match-beginning num) (match-end num))
+ (buffer-substring (match-beginning num) (match-end num)))))
+
+;; Emacs 20.3 and later: (match-string-no-properties NUM &optional STRING)
+(defun-maybe match-string-no-properties (num &optional string)
+ "Return string of text matched by last search, without text properties.
+NUM specifies which parenthesized expression in the last regexp.
+ Value is nil if NUMth pair didn't match, or there were less than NUM pairs.
+Zero means the entire text matched by the whole regexp or whole string.
+STRING should be given if the last search was by `string-match' on STRING."
+ (if (match-beginning num)
+ (if string
+ (let ((result
+ (substring string (match-beginning num) (match-end num))))
+ (set-text-properties 0 (length result) nil result)
+ result)
+ (buffer-substring-no-properties (match-beginning num)
+ (match-end num)))))
+
+;; Emacs 20.1/XEmacs 20.3(?) and later: (split-string STRING &optional PATTERN)
+;; Here is a XEmacs version.
+(defun-maybe split-string (string &optional pattern)
+ "Return a list of substrings of STRING which are separated by PATTERN.
+If PATTERN is omitted, it defaults to \"[ \\f\\t\\n\\r\\v]+\"."
+ (or pattern
+ (setq pattern "[ \f\t\n\r\v]+"))
+ ;; The FSF version of this function takes care not to cons in case
+ ;; of infloop. Maybe we should synch?
+ (let (parts (start 0))
+ (while (string-match pattern string start)
+ (setq parts (cons (substring string start (match-beginning 0)) parts)
+ start (match-end 0)))
+ (nreverse (cons (substring string start) parts))))
+
+;; Emacs 20.1/XEmacs 20.3 (but first appeared in Epoch?): (functionp OBJECT)
+(defun-maybe functionp (object)
+ "Non-nil if OBJECT is a type of object that can be called as a function."
+ (or (subrp object) (byte-code-function-p object)
+ (eq (car-safe object) 'lambda)
+ (and (symbolp object) (fboundp object))))
+\f
-(defun-maybe string (&rest chars)
- "Concatenate all the argument characters and make the result a string."
- (mapconcat (function char-to-string) chars ""))
+;;; @ Window commands emulation. (lisp/window.el)
+;;;
+
+(defmacro-maybe save-selected-window (&rest body)
+ "Execute BODY, then select the window that was selected before BODY."
+ (list 'let
+ '((save-selected-window-window (selected-window)))
+ (list 'unwind-protect
+ (cons 'progn body)
+ (list 'select-window 'save-selected-window-window))))
+\f
+
+;;; @ Basic editing commands emulation. (lisp/simple.el)
+;;;
+\f
+
+;;; @ File input and output commands emulation. (lisp/files.el)
+;;;
+
+(defvar-maybe temporary-file-directory
+ (file-name-as-directory
+ (cond ((memq system-type '(ms-dos windows-nt))
+ (or (getenv "TEMP") (getenv "TMPDIR") (getenv "TMP") "c:/temp"))
+ ((memq system-type '(vax-vms axp-vms))
+ (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "SYS$SCRATCH:"))
+ (t
+ (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "/tmp"))))
+ "The directory for writing temporary files.")
+
+;; Actually, `path-separator' is defined in src/emacs.c and overrided
+;; in dos-w32.el.
+(defvar-maybe path-separator ":"
+ "The directory separator in search paths, as a string.")
+
+;; `convert-standard-filename' is defined in lisp/files.el and overrided
+;; in lisp/dos-fns.el and lisp/w32-fns.el for each environment.
+(cond
+ ;; must be load-time check to share .elc between different systems.
+ ((fboundp 'convert-standard-filename))
+ ((memq system-type '(windows-nt ms-dos))
+ ;; should we do (require 'filename) at load-time ?
+ ;; (require 'filename)
+ ;; filename.el requires many modules, so we do not want to load it
+ ;; at compile-time. Instead, suppress warnings by these autoloads.
+ (eval-when-compile
+ (autoload 'filename-maybe-truncate-by-size "filename")
+ (autoload 'filename-special-filter "filename"))
+ (defun convert-standard-filename (filename)
+ "Convert a standard file's name to something suitable for the current OS.
+This function's standard definition is trivial; it just returns the argument.
+However, on some systems, the function is redefined
+with a definition that really does change some file names.
+Under `windows-nt' or `ms-dos', it refers `filename-replacement-alist' and
+`filename-limit-length' for the basic filename and each parent directory name."
+ (require 'filename)
+ (let* ((names (split-string filename "/"))
+ (drive-name (car names))
+ (filter (function
+ (lambda (string)
+ (filename-maybe-truncate-by-size
+ (filename-special-filter string))))))
+ (cond
+ ((eq 1 (length names))
+ (funcall filter drive-name))
+ ((string-match "^[^/]:$" drive-name)
+ (concat drive-name "/" (mapconcat filter (cdr names) "/")))
+ (t
+ (mapconcat filter names "/"))))))
+ (t
+ (defun convert-standard-filename (filename)
+ "Convert a standard file's name to something suitable for the current OS.
+This function's standard definition is trivial; it just returns the argument.
+However, on some systems, the function is redefined
+with a definition that really does change some file names.
+Under `windows-nt' or `ms-dos', it refers `filename-replacement-alist' and
+`filename-limit-length' for the basic filename and each parent directory name."
+ filename)))
+
+(static-cond
+ ((fboundp 'insert-file-contents-literally))
+ ((boundp 'file-name-handler-alist)
+ ;; Use `defun-maybe' to update `load-history'.
+ (defun-maybe insert-file-contents-literally (filename &optional visit
+ beg end replace)
+ "Like `insert-file-contents', q.v., but only reads in the file.
+A buffer may be modified in several ways after reading into the buffer due
+to advanced Emacs features, such as file-name-handlers, format decoding,
+find-file-hooks, etc.
+ This function ensures that none of these modifications will take place."
+ (let (file-name-handler-alist)
+ (insert-file-contents filename visit beg end replace))))
+ (t
+ (defalias 'insert-file-contents-literally 'insert-file-contents)))
+
+(defun-maybe file-name-sans-extension (filename)
+ "Return FILENAME sans final \"extension\".
+The extension, in a file name, is the part that follows the last `.'."
+ (save-match-data
+ (let ((file (file-name-sans-versions (file-name-nondirectory filename)))
+ directory)
+ (if (string-match "\\.[^.]*\\'" file)
+ (if (setq directory (file-name-directory filename))
+ (expand-file-name (substring file 0 (match-beginning 0))
+ directory)
+ (substring file 0 (match-beginning 0)))
+ filename))))
+\f
-
-;;; @ XEmacs emulation
+;;; @ XEmacs emulation.
;;;
(defun-maybe find-face (face-or-name)
"Retrieve the face of the given name.
If FACE-OR-NAME is a face object, it is simply returned.
Otherwise, FACE-OR-NAME should be a symbol. If there is no such face,
-nil is returned. Otherwise the associated face object is returned.
-\[XEmacs emulating function]"
+nil is returned. Otherwise the associated face object is returned."
(car (memq face-or-name (face-list))))
+;; Emacs 21.1 defines this as an alias for `line-beginning-position'.
+;; Therefore, optional 2nd arg BUFFER is not portable.
(defun-maybe point-at-bol (&optional n buffer)
"Return the character position of the first character on the current line.
With argument N not nil or 1, move forward N - 1 lines first.
If scan reaches end of buffer, return that position.
-This function does not move point.
-\[XEmacs emulating function]"
+This function does not move point."
(save-excursion
(if buffer (set-buffer buffer))
(forward-line (1- (or n 1)))
(point)))
+;; Emacs 21.1 defines this as an alias for `line-end-position'.
+;; Therefore, optional 2nd arg BUFFER is not portable.
(defun-maybe point-at-eol (&optional n buffer)
"Return the character position of the last character on the current line.
With argument N not nil or 1, move forward N - 1 lines first.
If scan reaches end of buffer, return that position.
-This function does not move point.
-\[XEmacs emulating function]"
+This function does not move point."
(save-excursion
(if buffer (set-buffer buffer))
(end-of-line (or n 1))
(defsubst-maybe define-obsolete-function-alias (oldfun newfun)
"Define OLDFUN as an obsolete alias for function NEWFUN.
This makes calling OLDFUN equivalent to calling NEWFUN and marks OLDFUN
-as obsolete.
-\[XEmacs emulating function]"
+as obsolete."
(defalias oldfun newfun)
(make-obsolete oldfun newfun))
-(when (subr-fboundp 'read-event)
- ;; for Emacs 19 or later
-
- (defun-maybe-cond next-command-event (&optional event prompt)
- "Read an event object from the input stream.
+;; XEmacs 21: (character-to-event CH &optional EVENT DEVICE)
+(defun-maybe character-to-event (ch)
+ "Convert keystroke CH into an event structure, replete with bucky bits.
+Note that CH (the keystroke specifier) can be an integer, a character
+or a symbol such as 'clear."
+ ch)
+
+;; XEmacs 21: (event-to-character EVENT
+;; &optional ALLOW-EXTRA-MODIFIERS ALLOW-META ALLOW-NON-ASCII)
+(defun-maybe-cond event-to-character (event)
+ "Return the character approximation to the given event object.
+If the event isn't a keypress, this returns nil."
+ ((and (fboundp 'read-event)
+ (subrp (symbol-function 'read-event)))
+ ;; Emacs 19 and later.
+ (cond
+ ((symbolp event)
+ ;; mask is (BASE-TYPE MODIFIER-BITS) or nil.
+ (let ((mask (get event 'event-symbol-element-mask)))
+ (if mask
+ (let ((base (get (car mask) 'ascii-character)))
+ (if base
+ (logior base (car (cdr mask))))))))
+ ((integerp event) event)))
+ (t
+ ;; v18. Is this correct?
+ event))
+
+;; v18: no event; (read-char)
+;; Emacs 19, 20.1 and 20.2: (read-event)
+;; Emacs 20.3: (read-event &optional PROMPT SUPPRESS-INPUT-METHOD)
+;; Emacs 20.4: (read-event &optional PROMPT INHERIT-INPUT-METHOD)
+;; XEmacs: (next-event &optional EVENT PROMPT),
+;; (next-command-event &optional EVENT PROMPT)
+(defun-maybe-cond next-command-event (&optional event prompt)
+ "Read an event object from the input stream.
If EVENT is non-nil, it should be an event object and will be filled
in and returned; otherwise a new event object will be created and
returned.
If PROMPT is non-nil, it should be a string and will be displayed in
-the echo area while this function is waiting for an event.
-\[XEmacs emulating function]"
- ((subr-fboundp 'string)
- ;; for Emacs 20.3 or later
- (read-event prompt t)
- )
- (t
- (if prompt (message prompt))
- (read-event)
- ))
-
- (defsubst-maybe character-to-event (ch)
- "Convert keystroke CH into an event structure, replete with bucky bits.
-Note that CH (the keystroke specifier) can be an integer, a character
-or a symbol such as 'clear. [XEmacs emulating function]"
- ch)
-
- (defsubst-maybe event-to-character (event)
- "Return the character approximation to the given event object.
-If the event isn't a keypress, this returns nil.
-\[XEmacs emulating function]"
- (cond ((symbolp event)
- ;; mask is (BASE-TYPE MODIFIER-BITS) or nil.
- (let ((mask (get event 'event-symbol-element-mask)))
- (if mask
- (let ((base (get (car mask) 'ascii-character)))
- (if base
- (logior base (car (cdr mask)))
- )))))
- ((integerp event) event)))
- )
-
+the echo area while this function is waiting for an event."
+ ((and (>= emacs-major-version 20)
+ (>= emacs-minor-version 4))
+ ;; Emacs 20.4 and later.
+ (read-event prompt)) ; should specify 2nd arg?
+ ((and (= emacs-major-version 20)
+ (= emacs-minor-version 3))
+ ;; Emacs 20.3.
+ (read-event prompt)) ; should specify 2nd arg?
+ ((and (fboundp 'read-event)
+ (subrp (symbol-function 'read-event)))
+ ;; Emacs 19, 20.1 and 20.2.
+ (if prompt (message prompt))
+ (read-event))
+ (t
+ (if prompt (message prompt))
+ (read-char)))
+\f
-;;; @ MULE 2 emulation
+;;; @ MULE 2 emulation.
;;;
(defun-maybe-cond cancel-undo-boundary ()
- "Cancel undo boundary. [MULE 2.3 emulating function]"
+ "Cancel undo boundary."
((boundp 'buffer-undo-list)
- ;; for Emacs 19.7 or later
+ ;; for Emacs 19 and later.
(if (and (consp buffer-undo-list)
- ;; if car is nil.
(null (car buffer-undo-list)))
- (setq buffer-undo-list (cdr buffer-undo-list))
- ))
- (t
- ;; for anything older than Emacs 19.7.
- ))
-
+ (setq buffer-undo-list (cdr buffer-undo-list)))))
+\f
-;;; @ end
+;;; @ End.
;;;
;;; poe.el ends here
projects / elisp / apel.git / blobdiff