X-Git-Url: http://git.chise.org/gitweb/?a=blobdiff_plain;f=poe.el;h=3650633dbeb3faca54cf901bf64e2076d98bcddb;hb=42e5612b0e66dac01e8a4b7e3afea1aac830cf06;hp=fb56d9eb5313c13cbe1c4d1b44a1c3eb0e4e42c6;hpb=9f3158a83c75893da40ceb2ef3fd6ead93d241c9;p=elisp%2Fapel.git

diff --git a/poe.el b/poe.el
index fb56d9e..3650633 100644
--- a/poe.el
+++ b/poe.el
@@ -1,8 +1,8 @@
 ;;; poe.el --- Portable Outfit for Emacsen; -*-byte-compile-dynamic: t;-*-
 
-;; Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
+;; Copyright (C) 1995,1996,1997,1998,1999 Free Software Foundation, Inc.
 
-;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
+;; Author: MORIOKA Tomohiko <tomo@m17n.org>
 ;; Keywords: emulation, compatibility, NEmacs, MULE, Emacs/mule, XEmacs
 
 ;; This file is part of APEL (A Portable Emacs Library).
@@ -29,6 +29,8 @@
 
 ;;; Code:
 
+(provide 'poe)
+
 (defmacro defun-maybe (name &rest everything-else)
   (or (and (fboundp name)
 	   (not (get name 'defun-maybe)))
@@ -39,23 +41,28 @@
 	       ))
 	 )))
 
-(defmacro defsubst-maybe (name &rest everything-else)
+(defmacro defmacro-maybe (name &rest everything-else)
   (or (and (fboundp name)
-	   (not (get name 'defsubst-maybe)))
+	   (not (get name 'defmacro-maybe)))
       (` (or (fboundp (quote (, name)))
 	     (progn
-	       (defsubst (, name) (,@ everything-else))
-	       (put (quote (, name)) 'defsubst-maybe t)
+	       (defmacro (, name) (,@ everything-else))
+	       (put (quote (, name)) 'defmacro-maybe t)
 	       ))
 	 )))
 
-(defmacro defmacro-maybe (name &rest everything-else)
+(defmacro-maybe defsubst (name arglist &rest body)
+  "Define an inline function.  The syntax is just like that of `defun'."
+  (cons 'defun (cons name (cons arglist body)))
+  )
+
+(defmacro defsubst-maybe (name &rest everything-else)
   (or (and (fboundp name)
-	   (not (get name 'defmacro-maybe)))
+	   (not (get name 'defsubst-maybe)))
       (` (or (fboundp (quote (, name)))
 	     (progn
-	       (defmacro (, name) (,@ everything-else))
-	       (put (quote (, name)) 'defmacro-maybe t)
+	       (defsubst (, name) (,@ everything-else))
+	       (put (quote (, name)) 'defsubst-maybe t)
 	       ))
 	 )))
 
@@ -96,25 +103,27 @@
 	 )))
 
 (defmacro defun-maybe-cond (name args &optional doc &rest everything-else)
-  (unless (stringp doc)
-    (setq everything-else (cons doc everything-else)
-	  doc nil)
-    )
+  (or (stringp doc)
+      (setq everything-else (cons doc everything-else)
+	    doc nil)
+      )
   (or (and (fboundp name)
 	   (not (get name 'defun-maybe)))
-      (` (unless (fboundp (quote (, name)))
-	   (cond (,@ (mapcar (lambda (case)
-			       (list (car case)
-				     (if doc
-					 (` (defun (, name) (, args)
-					      (, doc)
-					      (,@ (cdr case))))
-				       (` (defun (, name) (, args)
-					    (,@ (cdr case))))
-				       )))
-			     everything-else)))
-	   (put (quote (, name)) 'defun-maybe t)
-	   ))))
+      (` (or (fboundp (quote (, name)))
+	     (progn
+	       (cond (,@ (mapcar (function
+				  (lambda (case)
+				    (list (car case)
+					  (if doc
+					      (` (defun (, name) (, args)
+						   (, doc)
+						   (,@ (cdr case))))
+					    (` (defun (, name) (, args)
+						 (,@ (cdr case))))
+					    ))))
+				 everything-else)))
+	       (put (quote (, name)) 'defun-maybe t)
+	       )))))
 
 (defsubst subr-fboundp (symbol)
   "Return t if SYMBOL's function definition is a built-in function."
@@ -150,25 +159,128 @@
        (require 'poe-18)
        ))
 
-
-;;; @ Emacs 19 emulation
+;;; @ Emacs 19.23 emulation
 ;;;
 
-(defmacro-maybe eval-and-compile (&rest body)
-  "Like `progn', but evaluates the body at compile time and at load time."
-  ;; Remember, it's magic.
-  (cons 'progn body))
-
 (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
 ;;;
 
+(eval-when-compile (require 'static))
+
+;; `add-hook' and `remove-hook' are imported from Emacs 19.28
+;; (with additional `local' argument).
+(static-condition-case nil
+    (let (test-hook)
+      (add-hook 'test-hook 'test 'append 'local)
+      (remove-hook 'test-hook 'test 'local))
+  (void-function
+   ;; emulate add-hook/remove-hook for version 18.
+   (defun-maybe add-hook (hook function &optional append local)
+     "Add to the value of HOOK the function FUNCTION.
+FUNCTION is not added if already present.
+FUNCTION is added \(if necessary\) at the beginning of the hook list
+unless the optional argument APPEND is non-nil, in which case
+FUNCTION is added at the end.
+
+The optional fourth argument, LOCAL, if non-nil, says to modify
+the hook's buffer-local value rather than its default value
+\(LOCAL is only for emulation\).
+
+HOOK should be a symbol, and FUNCTION may be any valid function.  If
+HOOK is void, it is first set to nil.  If HOOK's value is a single
+function, it is changed to a list of functions.
+\[Emacs 19.29 emulating function]"
+     (or (boundp hook)
+	 (set hook nil))
+     ;; If the hook value is a single function, turn it into a list.
+     (let ((old (symbol-value hook)))
+       (if (or (not (listp old))
+	       (eq (car old) 'lambda))
+	   (set hook (list old))))
+     (or (if (consp function)
+	     ;; Clever way to tell whether a given lambda-expression
+	     ;; is equal to anything in the hook.
+	     (let ((tail (assoc (cdr function) (symbol-value hook))))
+	       (equal function tail))
+	   (memq function (symbol-value hook)))
+	 (set hook 
+	      (if append
+		  (nconc (symbol-value hook) (list function))
+		(cons function (symbol-value hook))))))
+
+   (defun-maybe remove-hook (hook function &optional local)
+     "Remove from the value of HOOK the function FUNCTION.
+HOOK should be a symbol, and FUNCTION may be any valid function.  If
+FUNCTION isn't the value of HOOK, or, if FUNCTION doesn't appear in the
+list of hooks to run in HOOK, then nothing is done.  See `add-hook'.
+
+The optional third argument, LOCAL, if non-nil, says to modify
+the hook's buffer-local value rather than its default value
+\(LOCAL is only for emulation\).
+\[Emacs 19.29 emulating function]"
+     (if (or (not (boundp hook))
+	     (null (symbol-value hook))
+	     (null function))
+	 nil
+       (let ((hook-value (symbol-value hook)))
+	 (if (consp hook-value)
+	     (setq hook-value (delete function hook-value))
+	   (if (equal hook-value function)
+	       (setq hook-value nil)))
+	 (set hook hook-value))))
+   )
+  (wrong-number-of-arguments
+   ;; emulate `local' arg for version 19.28 and earlier.
+   (or (fboundp 'si:add-hook)
+       (progn
+	 (fset 'si:add-hook (symbol-function 'add-hook))
+	 (defun add-hook (hook function &optional append local)
+	   "Add to the value of HOOK the function FUNCTION.
+FUNCTION is not added if already present.
+FUNCTION is added \(if necessary\) at the beginning of the hook list
+unless the optional argument APPEND is non-nil, in which case
+FUNCTION is added at the end.
+
+The optional fourth argument, LOCAL, if non-nil, says to modify
+the hook's buffer-local value rather than its default value
+\(LOCAL is only for emulation\).
+
+HOOK should be a symbol, and FUNCTION may be any valid function.  If
+HOOK is void, it is first set to nil.  If HOOK's value is a single
+function, it is changed to a list of functions.
+\[Emacs 19.29 emulating function]"
+	   ;; the fourth argument LOCAL is simply ignored.
+	   (si:add-hook hook function append))))
+
+   (or (fboundp 'si:remove-hook)
+       (progn
+	 (fset 'si:remove-hook (symbol-function 'remove-hook))
+	 (defun remove-hook (hook function &optional local)
+	   "Remove from the value of HOOK the function FUNCTION.
+HOOK should be a symbol, and FUNCTION may be any valid function.  If
+FUNCTION isn't the value of HOOK, or, if FUNCTION doesn't appear in the
+list of hooks to run in HOOK, then nothing is done.  See `add-hook'.
+
+The optional third argument, LOCAL, if non-nil, says to modify
+the hook's buffer-local value rather than its default value
+\(LOCAL is only for emulation\).
+\[Emacs 19.29 emulating function]"
+	   ;; the third argument LOCAL is simply ignored.
+	   (si:remove-hook hook function))))
+   ))
+
+(defun-maybe make-local-hook (hook)
+  "Make the hook HOOK local to the current buffer.
+This function is only for emulation.
+\[Emacs 19.29 emulating function]"
+  )
+
 (defvar-maybe path-separator ":"
   "Character used to separate concatenated paths.")
 
@@ -219,22 +331,18 @@ The value is actually the element of LIST whose cdr equals KEY."
       (setq list (cdr list)))
     ))
 
-(defmacro-maybe make-local-hook (hook))
-
-;; They are not Emacs features
-
-(defmacro-maybe add-local-hook (hook function &optional append)
-  (if (fboundp 'make-local-hook)
-      (list 'add-hook hook function append t)
-    (list 'add-hook hook function append)
-    ))
-
-(defmacro-maybe remove-local-hook (hook function)
-  (if (fboundp 'make-local-hook)
-      (list 'remove-hook hook function t)
-    (list 'remove-hook hook function)
-    ))
-
+(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))))
 
 ;;; @ Emacs 19.30 emulation
 ;;;
@@ -302,6 +410,27 @@ Value is nil if OBJECT is not a buffer or if it has been killed.
   "(unless COND BODY...): if COND yields nil, do BODY, else return nil."
   (cons 'if (cons cond (cons nil body))))
 
+;; imported from Emacs 20.3.
+(defsubst-maybe caar (x)
+  "Return the car of the car of X."
+  (car (car x)))
+
+;; imported from Emacs 20.3.
+(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))
+
 (defmacro-maybe save-current-buffer (&rest body)
   "Save the current buffer; execute BODY; restore the current buffer.
 Executes BODY just like `progn'."
@@ -352,21 +481,9 @@ See also `with-temp-file' and `with-output-to-string'."
 	   (and (buffer-name (, temp-buffer))
 		(kill-buffer (, temp-buffer))))))))
 
-;; imported from Emacs 20.3.
-(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))
+(defmacro-maybe combine-after-change-calls (&rest body)
+  "Execute BODY."
+  (cons 'progn body))
 
 ;; imported from Emacs 20.3. (cl function)
 (defun-maybe butlast (x &optional n)
@@ -559,6 +676,4 @@ If the event isn't a keypress, this returns nil.
 ;;; @ end
 ;;;
 
-(provide 'poe)
-
 ;;; poe.el ends here