;;; subr.el --- basic lisp subroutines for Emacs
-;;; Copyright (C) 1985, 1986, 1992, 1994 Free Software Foundation, Inc.
+;; Copyright (C) 1985, 1986, 1992, 1994, 1995 Free Software Foundation, Inc.
;; This file is part of GNU Emacs.
;; 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.
+;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
;;; Code:
-
+(defvar custom-declare-variable-list nil
+ "Record `defcustom' calls made before `custom.el' is loaded to handle them.
+Each element of this list holds the arguments to one call to `defcustom'.")
+
+;; Use this rather that defcustom, in subr.el and other files loaded
+;; before custom.el.
+(defun custom-declare-variable-early (&rest arguments)
+ (setq custom-declare-variable-list
+ (cons arguments custom-declare-variable-list)))
\f
;;;; Lisp language features.
funcall or mapcar, etc.
ARGS should take the same form as an argument list for a `defun'.
-DOCSTRING should be a string, as described for `defun'. It may be omitted.
+DOCSTRING is an optional documentation string.
+ If present, it should describe how to call the function.
+ But documentation strings are usually not useful in nameless functions.
INTERACTIVE should be a call to the function `interactive', which see.
It may also be omitted.
BODY should be a list of lisp expressions."
;; depend on backquote.el.
(list 'function (cons 'lambda cdr)))
-;;(defmacro defun-inline (name args &rest body)
-;; "Create an \"inline defun\" (actually a macro).
-;;Use just like `defun'."
-;; (nconc (list 'defmacro name '(&rest args))
-;; (if (stringp (car body))
-;; (prog1 (list (car body))
-;; (setq body (or (cdr body) body))))
-;; (list (list 'cons (list 'quote
-;; (cons 'lambda (cons args body)))
-;; 'args))))
-
-\f
-;;;; Window tree functions.
-
-(defun one-window-p (&optional nomini all-frames)
- "Returns non-nil if the selected window is the only window (in its frame).
-Optional arg NOMINI non-nil means don't count the minibuffer
-even if it is active.
-
-The optional arg ALL-FRAMES t means count windows on all frames.
-If it is `visible', count windows on all visible frames.
-ALL-FRAMES nil or omitted means count only the selected frame,
-plus the minibuffer it uses (which may be on another frame).
-If ALL-FRAMES is neither nil nor t, count only the selected frame."
- (let ((base-window (selected-window)))
- (if (and nomini (eq base-window (minibuffer-window)))
- (setq base-window (next-window base-window)))
- (eq base-window
- (next-window base-window (if nomini 'arg) all-frames))))
-
-(defun walk-windows (proc &optional minibuf all-frames)
- "Cycle through all visible windows, calling PROC for each one.
-PROC is called with a window as argument.
-Optional second arg MINIBUF t means count the minibuffer window
-even if not active. If MINIBUF is neither t nor nil it means
-not to count the minibuffer even if it is active.
-
-Optional third arg ALL-FRAMES, if t, means include all frames.
-ALL-FRAMES nil or omitted means cycle within the selected frame,
-but include the minibuffer window (if MINIBUF says so) that that
-frame uses, even if it is on another frame.
-If ALL-FRAMES is neither nil nor t, stick strictly to the selected frame."
- ;; If we start from the minibuffer window, don't fail to come back to it.
- (if (window-minibuffer-p (selected-window))
- (setq minibuf t))
- (let* ((walk-windows-start (selected-window))
- (walk-windows-current walk-windows-start))
- (while (progn
- (setq walk-windows-current
- (next-window walk-windows-current minibuf all-frames))
- (funcall proc walk-windows-current)
- (not (eq walk-windows-current walk-windows-start))))))
-
-(defun minibuffer-window-active-p (window)
- "Return t if WINDOW (a minibuffer window) is now active."
- ;; nil nil means include WINDOW's frame
- ;; and other frames using WINDOW as minibuffer,
- ;; and include minibuffer if active.
- (let ((prev (previous-window window nil nil)))
- ;; If PREV equals WINDOW, WINDOW must be on a minibuffer-only frame
- ;; and it's not currently being used. So return nil.
- (and (not (eq window prev))
- (let ((should-be-same (next-window prev nil nil)))
- ;; If next-window doesn't reverse previous-window,
- ;; WINDOW must be outside the cycle specified by nil nil.
- (eq should-be-same window)))))
+(defmacro when (cond &rest body)
+ "(when COND BODY...): if COND yields non-nil, do BODY, else return nil."
+ (list 'if cond (cons 'progn body)))
+(put 'when 'lisp-indent-function 1)
+(put 'when 'edebug-form-spec '(&rest form))
+
+(defmacro unless (cond &rest body)
+ "(unless COND BODY...): if COND yields nil, do BODY, else return nil."
+ (cons 'if (cons cond (cons nil body))))
+(put 'unless 'lisp-indent-function 1)
+(put 'unless 'edebug-form-spec '(&rest form))
\f
;;;; Keymap support.
(while (and (symbolp inner-def)
(fboundp inner-def))
(setq inner-def (symbol-function inner-def)))
- (if (eq defn olddef)
+ (if (or (eq defn olddef)
+ ;; Compare with equal if definition is a key sequence.
+ ;; That is useful for operating on function-key-map.
+ (and (or (stringp defn) (vectorp defn))
+ (equal defn olddef)))
(define-key keymap prefix1 (nconc (nreverse skipped) newdef))
(if (and (keymapp defn)
;; Avoid recursively scanning
;; where KEYMAP does not have a submap.
- (keymapp (lookup-key keymap prefix1))
+ (let ((elt (lookup-key keymap prefix1)))
+ (or (null elt)
+ (keymapp elt)))
;; Avoid recursively rescanning keymap being scanned.
(not (memq inner-def
key-substitution-in-progress)))
(substitute-key-definition olddef newdef keymap
inner-def
prefix1)))))
- (if (arrayp (car scan))
+ (if (vectorp (car scan))
(let* ((array (car scan))
(len (length array))
(i 0))
(while (and (symbolp inner-def)
(fboundp inner-def))
(setq inner-def (symbol-function inner-def)))
- (if (eq defn olddef)
+ (if (or (eq defn olddef)
+ (and (or (stringp defn) (vectorp defn))
+ (equal defn olddef)))
(define-key keymap prefix1
(nconc (nreverse skipped) newdef))
(if (and (keymapp defn)
- (keymapp (lookup-key keymap prefix1))
+ (let ((elt (lookup-key keymap prefix1)))
+ (or (null elt)
+ (keymapp elt)))
(not (memq inner-def
key-substitution-in-progress)))
(substitute-key-definition olddef newdef keymap
inner-def
prefix1)))))
- (setq i (1+ i))))))
+ (setq i (1+ i))))
+ (if (char-table-p (car scan))
+ (map-char-table
+ (function (lambda (char defn)
+ (let ()
+ ;; The inside of this let duplicates exactly
+ ;; the inside of the previous let,
+ ;; except that it uses set-char-table-range
+ ;; instead of define-key.
+ (aset vec1 0 char)
+ (aset prefix1 (length prefix) char)
+ (let (inner-def skipped)
+ ;; Skip past menu-prompt.
+ (while (stringp (car-safe defn))
+ (setq skipped (cons (car defn) skipped))
+ (setq defn (cdr defn)))
+ (and (consp defn) (consp (car defn))
+ (setq defn (cdr defn)))
+ (setq inner-def defn)
+ (while (and (symbolp inner-def)
+ (fboundp inner-def))
+ (setq inner-def (symbol-function inner-def)))
+ (if (or (eq defn olddef)
+ (and (or (stringp defn) (vectorp defn))
+ (equal defn olddef)))
+ (define-key keymap prefix1
+ (nconc (nreverse skipped) newdef))
+ (if (and (keymapp defn)
+ (let ((elt (lookup-key keymap prefix1)))
+ (or (null elt)
+ (keymapp elt)))
+ (not (memq inner-def
+ key-substitution-in-progress)))
+ (substitute-key-definition olddef newdef keymap
+ inner-def
+ prefix1)))))))
+ (car scan)))))
(setq scan (cdr scan)))))
(defun define-key-after (keymap key definition after)
"Add binding in KEYMAP for KEY => DEFINITION, right after AFTER's binding.
This is like `define-key' except that the binding for KEY is placed
just after the binding for the event AFTER, instead of at the beginning
-of the map.
-The order matters when the keymap is used as a menu.
+of the map. Note that AFTER must be an event type (like KEY), NOT a command
+\(like DEFINITION).
+
+If AFTER is t, the new binding goes at the end of the keymap.
+
KEY must contain just one event type--that is to say, it must be
-a string or vector of length 1."
+a string or vector of length 1.
+
+The order of bindings in a keymap matters when it is used as a menu."
+
(or (keymapp keymap)
(signal 'wrong-type-argument (list 'keymapp keymap)))
(if (> (length key) 1)
;; When we reach AFTER's binding, insert the new binding after.
;; If we reach an inherited keymap, insert just before that.
;; If we reach the end of this keymap, insert at the end.
- (if (or (eq (car-safe (car tail)) after)
+ (if (or (and (eq (car-safe (car tail)) after)
+ (not (eq after t)))
(eq (car (cdr tail)) 'keymap)
(null (cdr tail)))
(progn
(setq inserted t)))
(setq tail (cdr tail)))))
+(defmacro kbd (keys)
+ "Convert KEYS to the internal Emacs key representation.
+KEYS should be a string constant in the format used for
+saving keyboard macros (see `insert-kbd-macro')."
+ (read-kbd-macro keys))
+
+(put 'keyboard-translate-table 'char-table-extra-slots 0)
+
(defun keyboard-translate (from to)
"Translate character FROM to TO at a low level.
This function creates a `keyboard-translate-table' if necessary
and then modifies one entry in it."
- (or (arrayp keyboard-translate-table)
- (setq keyboard-translate-table ""))
- (if (or (> from (length keyboard-translate-table))
- (> to (length keyboard-translate-table)))
- (progn
- (let* ((i (length keyboard-translate-table))
- (table (concat keyboard-translate-table
- (make-string (- 256 i) 0))))
- (while (< i 256)
- (aset table i i)
- (setq i (1+ i)))
- (setq keyboard-translate-table table))))
+ (or (char-table-p keyboard-translate-table)
+ (setq keyboard-translate-table
+ (make-char-table 'keyboard-translate-table nil)))
(aset keyboard-translate-table from to))
\f
(defalias 'buffer-flush-undo 'buffer-disable-undo)
(defalias 'eval-current-buffer 'eval-buffer)
(defalias 'compiled-function-p 'byte-code-function-p)
+(defalias 'define-function 'defalias)
;; Some programs still use this as a function.
(defun baud-rate ()
Please convert your programs to use the variable `baud-rate' directly."
baud-rate)
+(defalias 'focus-frame 'ignore)
+(defalias 'unfocus-frame 'ignore)
\f
;;;; Alternate names for functions - these are not being phased out.
(defalias 'string= 'string-equal)
(defalias 'string< 'string-lessp)
(defalias 'move-marker 'set-marker)
-(defalias 'eql 'eq)
(defalias 'not 'null)
(defalias 'rplaca 'setcar)
(defalias 'rplacd 'setcdr)
\f
;;;; Hook manipulation functions.
-(defun run-hooks (&rest hooklist)
- "Takes hook names and runs each one in turn. Major mode functions use this.
-Each argument should be a symbol, a hook variable.
-These symbols are processed in the order specified.
-If a hook symbol has a non-nil value, that value may be a function
-or a list of functions to be called to run the hook.
-If the value is a function, it is called with no arguments.
-If it is a list, the elements are called, in order, with no arguments.
-
-To make a hook variable buffer-local, use `make-local-hook', not
-`make-local-variable'."
- (while hooklist
- (let ((sym (car hooklist)))
- (and (boundp sym)
- (symbol-value sym)
- (let ((value (symbol-value sym)))
- (if (and (listp value) (not (eq (car value) 'lambda)))
- (while value
- (if (eq (car value) t)
- ;; t indicates this hook has a local binding;
- ;; it means to run the global binding too.
- (let ((functions (default-value sym)))
- (while functions
- (funcall (car functions))
- (setq functions (cdr functions))))
- (funcall (car value)))
- (setq value (cdr value)))
- (funcall value)))))
- (setq hooklist (cdr hooklist))))
-
-(defun run-hook-with-args (hook &rest args)
- "Run HOOK with the specified arguments ARGS.
-HOOK should be a symbol, a hook variable. If HOOK has a non-nil
-value, that value may be a function or a list of functions to be
-called to run the hook. If the value is a function, it is called with
-the given arguments and its return value is returned. If it is a list
-of functions, those functions are called, in order,
-with the given arguments ARGS.
-It is best not to depend on the value return by `run-hook-with-args',
-as that may change.
-
-To make a hook variable buffer-local, use `make-local-hook', not
-`make-local-variable'."
- (and (boundp hook)
- (symbol-value hook)
- (let ((value (symbol-value hook)))
- (if (and (listp value) (not (eq (car value) 'lambda)))
- (while value
- (if (eq (car value) t)
- ;; t indicates this hook has a local binding;
- ;; it means to run the global binding too.
- (let ((functions (default-value hook)))
- (while functions
- (apply (car functions) args)
- (setq functions (cdr functions))))
- (apply (car value) args))
- (setq value (cdr value)))
- (apply value args)))))
-
-(defun run-hook-with-args-until-success (hook &rest args)
- "Run HOOK with the specified arguments ARGS.
-HOOK should be a symbol, a hook variable. Its value should
-be a list of functions. We call those functions, one by one,
-passing arguments ARGS to each of them, until one of them
-returns a non-nil value. Then we return that value.
-If all the functions return nil, we return nil.
-
-To make a hook variable buffer-local, use `make-local-hook', not
-`make-local-variable'."
- (and (boundp hook)
- (symbol-value hook)
- (let ((value (symbol-value hook))
- success)
- (while (and value (not success))
- (if (eq (car value) t)
- ;; t indicates this hook has a local binding;
- ;; it means to run the global binding too.
- (let ((functions (default-value hook)))
- (while (and functions (not success))
- (setq success (apply (car functions) args))
- (setq functions (cdr functions))))
- (setq success (apply (car value) args)))
- (setq value (cdr value)))
- success)))
-
-(defun run-hook-with-args-until-failure (hook &rest args)
- "Run HOOK with the specified arguments ARGS.
-HOOK should be a symbol, a hook variable. Its value should
-be a list of functions. We call those functions, one by one,
-passing arguments ARGS to each of them, until one of them
-returns nil. Then we return nil.
-If all the functions return non-nil, we return non-nil.
-
-To make a hook variable buffer-local, use `make-local-hook', not
-`make-local-variable'."
- ;; We must return non-nil if there are no hook functions!
- (or (not (boundp hook))
- (not (symbol-value hook))
- (let ((value (symbol-value hook))
- (success t))
- (while (and value success)
- (if (eq (car value) t)
- ;; t indicates this hook has a local binding;
- ;; it means to run the global binding too.
- (let ((functions (default-value hook)))
- (while (and functions success)
- (setq success (apply (car functions) args))
- (setq functions (cdr functions))))
- (setq success (apply (car value) args)))
- (setq value (cdr value)))
- success)))
-
-;; Tell C code how to call this function.
-(defconst run-hooks 'run-hooks
- "Variable by which C primitives find the function `run-hooks'.
-Don't change it.")
-
(defun make-local-hook (hook)
"Make the hook HOOK local to the current buffer.
When a hook is local, its local and global values
functions listed in *either* the local value *or* the global value
of the hook variable.
-This function does nothing if HOOK is already local in the current buffer.
+This function works by making `t' a member of the buffer-local value,
+which acts as a flag to run the hook functions in the default value as
+well. This works for all normal hooks, but does not work for most
+non-normal hooks yet. We will be changing the callers of non-normal
+hooks so that they can handle localness; this has to be done one by
+one.
+
+This function does nothing if HOOK is already local in the current
+buffer.
Do not use `make-local-variable' to make a hook variable buffer-local."
(if (local-variable-p hook)
(if (or local
;; Detect the case where make-local-variable was used on a hook
;; and do what we used to do.
- (and (local-variable-p hook)
+ (and (local-variable-if-set-p hook)
(not (memq t (symbol-value hook)))))
;; Alter the local value only.
(or (if (consp function)
(defun 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.
\f
;;;; Input and display facilities.
+(defvar read-quoted-char-radix 8
+ "*Radix for \\[quoted-insert] and other uses of `read-quoted-char'.
+Legitimate radix values are 8, 10 and 16.")
+
+(custom-declare-variable-early
+ 'read-quoted-char-radix 8
+ "*Radix for \\[quoted-insert] and other uses of `read-quoted-char'.
+Legitimate radix values are 8, 10 and 16."
+ :type '(choice (const 8) (const 10) (const 16))
+ :group 'editing-basics)
+
(defun read-quoted-char (&optional prompt)
- "Like `read-char', except that if the first character read is an octal
-digit, we read up to two more octal digits and return the character
-represented by the octal number consisting of those digits.
-Optional argument PROMPT specifies a string to use to prompt the user."
- (let ((message-log-max nil) (count 0) (code 0) char)
- (while (< count 3)
- (let ((inhibit-quit (zerop count))
- (help-form nil))
+ "Like `read-char', but do not allow quitting.
+Also, if the first character read is an octal digit,
+we read any number of octal digits and return the
+soecified character code. Any nondigit terminates the sequence.
+If the terminator is RET, it is discarded;
+any other terminator is used itself as input.
+
+The optional argument PROMPT specifies a string to use to prompt the user."
+ (let ((message-log-max nil) done (first t) (code 0) char)
+ (while (not done)
+ (let ((inhibit-quit first)
+ ;; Don't let C-h get the help message--only help function keys.
+ (help-char nil)
+ (help-form
+ "Type the special character you want to use,
+or the octal character code.
+RET terminates the character code and is discarded;
+any other non-digit terminates the character code and is then used as input."))
(and prompt (message "%s-" prompt))
- (setq char (read-char))
+ (setq char (read-event))
(if inhibit-quit (setq quit-flag nil)))
+ ;; Translate TAB key into control-I ASCII character, and so on.
+ (and char
+ (let ((translated (lookup-key function-key-map (vector char))))
+ (if translated
+ (setq char (aref translated 0)))))
(cond ((null char))
- ((and (<= ?0 char) (<= char ?7))
- (setq code (+ (* code 8) (- char ?0))
- count (1+ count))
- (and prompt (message (setq prompt
- (format "%s %c" prompt char)))))
- ((> count 0)
- (setq unread-command-events (list char) count 259))
- (t (setq code char count 259))))
+ ((not (integerp char))
+ (setq unread-command-events (list char)
+ done t))
+ ((and (<= ?0 char) (< char (+ ?0 (min 10 read-quoted-char-radix))))
+ (setq code (+ (* code read-quoted-char-radix) (- char ?0)))
+ (and prompt (setq prompt (message "%s %c" prompt char))))
+ ((and (<= ?a (downcase char))
+ (< (downcase char) (+ ?a -10 (min 26 read-quoted-char-radix))))
+ (setq code (+ (* code read-quoted-char-radix) (+ 10 (- char ?a))))
+ (and prompt (setq prompt (message "%s %c" prompt char))))
+ ((and (not first) (eq char ?\C-m))
+ (setq done t))
+ ((not first)
+ (setq unread-command-events (list char)
+ done t))
+ (t (setq code char
+ done t)))
+ (setq first nil))
;; Turn a meta-character into a character with the 0200 bit set.
(logior (if (/= (logand code ?\M-\^@) 0) 128 0)
- (logand 255 code))))
+ code)))
(defun force-mode-line-update (&optional all)
"Force the mode-line of the current buffer to be redisplayed.
On those systems, it is automatically local in every buffer.
On other systems, this variable is normally always nil.")
+;; This should probably be written in C (i.e., without using `walk-windows').
+(defun get-buffer-window-list (buffer &optional minibuf frame)
+ "Return windows currently displaying BUFFER, or nil if none.
+See `walk-windows' for the meaning of MINIBUF and FRAME."
+ (let ((buffer (if (bufferp buffer) buffer (get-buffer buffer))) windows)
+ (walk-windows (function (lambda (window)
+ (if (eq (window-buffer window) buffer)
+ (setq windows (cons window windows)))))
+ minibuf frame)
+ windows))
+
(defun ignore (&rest ignore)
"Do nothing and return nil.
This function accepts any number of arguments, but ignores them."
nil)
(defun error (&rest args)
- "Signal an error, making error message by passing all args to `format'."
+ "Signal an error, making error message by passing all args to `format'.
+In Emacs, the convention is that error messages start with a capital
+letter but *do not* end with a period. Please follow this convention
+for the sake of consistency."
(while t
(signal 'error (list (apply 'format args)))))
(t
(start-process name buffer shell-file-name shell-command-switch
(mapconcat 'identity args " ")))))
+\f
+(defmacro 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))
+
+(defmacro 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))))))
+
+(defmacro 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 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)))))
+
+(defmacro 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."
+ `(unwind-protect
+ (let ((combine-after-change-calls t))
+ . ,body)
+ (combine-after-change-execute)))
+
+\f
+(defvar save-match-data-internal)
+;; We use save-match-data-internal as the local variable because
+;; that works ok in practice (people should not use that variable elsewhere).
+;; We used to use an uninterned symbol; the compiler handles that properly
+;; now, but it generates slower code.
(defmacro save-match-data (&rest body)
"Execute the BODY forms, restoring the global value of the match data."
- (let ((original (make-symbol "match-data")))
- (list
- 'let (list (list original '(match-data)))
- (list 'unwind-protect
- (cons 'progn body)
- (list 'store-match-data original)))))
-
-(defun match-string (n &optional string)
- "Return the Nth subexpression matched by the last regexp search or match.
-If the last search or match was done against a string,
-specify that string as the second argument STRING."
- (if string
- (substring string (match-beginning n) (match-end n))
- (buffer-substring (match-beginning n) (match-end n))))
-
+ `(let ((save-match-data-internal (match-data)))
+ (unwind-protect
+ (progn ,@body)
+ (store-match-data save-match-data-internal))))
+
+(defun 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)))))
+
+(defun split-string (string &optional separators)
+ "Splits STRING into substrings where there are matches for SEPARATORS.
+Each match for SEPARATORS is a splitting point.
+The substrings between the splitting points are made into a list
+which is returned.
+If SEPARATORS is absent, it defaults to \"[ \\f\\t\\n\\r\\v]+\"."
+ (let ((rexp (or separators "[ \f\t\n\r\v]+"))
+ (start 0)
+ (list nil))
+ (while (string-match rexp string start)
+ (or (eq (match-beginning 0) 0)
+ (setq list
+ (cons (substring string start (match-beginning 0))
+ list)))
+ (setq start (match-end 0)))
+ (or (eq start (length string))
+ (setq list
+ (cons (substring string start)
+ list)))
+ (nreverse list)))
+\f
(defun shell-quote-argument (argument)
"Quote an argument for passing as argument to an inferior shell."
- ;; Quote everything except POSIX filename characters.
- ;; This should be safe enough even for really weird shells.
- (let ((result "") (start 0) end)
- (while (string-match "[^-0-9a-zA-Z_./]" argument start)
- (setq end (match-beginning 0)
- result (concat result (substring argument start end)
- "\\" (substring argument end (1+ end)))
- start (1+ end)))
- (concat result (substring argument start))))
+ (if (eq system-type 'ms-dos)
+ ;; MS-DOS shells don't have quoting, so don't do any.
+ argument
+ (if (eq system-type 'windows-nt)
+ (concat "\"" argument "\"")
+ (if (equal argument "")
+ "''"
+ ;; Quote everything except POSIX filename characters.
+ ;; This should be safe enough even for really weird shells.
+ (let ((result "") (start 0) end)
+ (while (string-match "[^-0-9a-zA-Z_./]" argument start)
+ (setq end (match-beginning 0)
+ result (concat result (substring argument start end)
+ "\\" (substring argument end (1+ end)))
+ start (1+ end)))
+ (concat result (substring argument start)))))))
(defun make-syntax-table (&optional oldtable)
"Return a new syntax table.
-It inherits all letters and control characters from the standard
-syntax table; other characters are copied from the standard syntax table."
+If OLDTABLE is non-nil, copy OLDTABLE.
+Otherwise, create a syntax table which inherits
+all letters and control characters from the standard syntax table;
+other characters are copied from the standard syntax table."
(if oldtable
(copy-syntax-table oldtable)
(let ((table (copy-syntax-table))
i)
(setq i 0)
(while (<= i 31)
- (aset table i 13)
+ (aset table i nil)
(setq i (1+ i)))
(setq i ?A)
(while (<= i ?Z)
- (aset table i 13)
+ (aset table i nil)
(setq i (1+ i)))
(setq i ?a)
(while (<= i ?z)
- (aset table i 13)
+ (aset table i nil)
(setq i (1+ i)))
(setq i 128)
(while (<= i 255)
- (aset table i 13)
+ (aset table i nil)
(setq i (1+ i)))
table)))
+
+(defun add-to-invisibility-spec (arg)
+ "Add elements to `buffer-invisibility-spec'.
+See documentation for `buffer-invisibility-spec' for the kind of elements
+that can be added."
+ (cond
+ ((or (null buffer-invisibility-spec) (eq buffer-invisibility-spec t))
+ (setq buffer-invisibility-spec (list arg)))
+ (t
+ (setq buffer-invisibility-spec
+ (cons arg buffer-invisibility-spec)))))
+
+(defun remove-from-invisibility-spec (arg)
+ "Remove elements from `buffer-invisibility-spec'."
+ (if buffer-invisibility-spec
+ (setq buffer-invisibility-spec (delete arg buffer-invisibility-spec))))
\f
(defun global-set-key (key command)
"Give KEY a global binding as COMMAND.
(local-set-key key nil))
nil)
\f
+;; We put this here instead of in frame.el so that it's defined even on
+;; systems where frame.el isn't loaded.
+(defun frame-configuration-p (object)
+ "Return non-nil if OBJECT seems to be a frame configuration.
+Any list whose car is `frame-configuration' is assumed to be a frame
+configuration."
+ (and (consp object)
+ (eq (car object) 'frame-configuration)))
+
+(defun functionp (object)
+ "Non-nil if OBJECT is a type of object that can be called as a function."
+ (or (subrp object) (compiled-function-p object)
+ (eq (car-safe object) 'lambda)
+ (and (symbolp object) (fboundp object))))
+
;; now in fns.c
;(defun nth (n list)
; "Returns the Nth element of LIST.
; alist)
;;; subr.el ends here
-
HCoop / bpt / emacs.git / blobdiff