--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lisp/emulators/mlsupport.el	Mon Aug 13 08:45:50 2007 +0200
@@ -0,0 +1,521 @@
+;;; mlsupport.el --- run-time support for mocklisp code.
+
+;; Copyright (C) 1985 Free Software Foundation, Inc.
+
+;; Maintainer: FSF
+;; Keywords: extensions
+
+;; This file is part of XEmacs.
+
+;; XEmacs is free software; you can redistribute it and/or modify it
+;; under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; XEmacs is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;; General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with XEmacs; see the file COPYING.  If not, write to the Free
+;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+;;; Synched up with: FSF 19.30.
+
+;;; Commentary:
+
+;; This package provides equivalents of certain primitives from Gosling
+;; Emacs (including the commercial UniPress versions).  These have an
+;; ml- prefix to distinguish them from native GNU Emacs functions with
+;; similar names.  The oackage mlconvert.el translates Mocklisp code
+;; to use these names.
+
+;;; Code:
+
+(or (fboundp 'ml-prefix-argument-loop)
+    (error "emacs was not compiled with #define MOCKLISP_SUPPORT in config.h"))
+
+(defmacro ml-defun (&rest defs)
+  (list 'ml-defun-1 (list 'quote defs)))
+
+(defun ml-defun-1 (args)
+  (while args
+    (fset (car (car args)) (cons 'mocklisp (cdr (car args))))
+    (setq args (cdr args))))
+
+(defmacro declare-buffer-specific (&rest vars)
+  (cons 'progn
+	(mapcar (function (lambda (var)
+		  (list 'make-variable-buffer-local (list 'quote var)))) 
+		vars)))
+
+(defun ml-set-default (varname value)
+  (set-default (intern varname) value))
+
+; Lossage: must make various things default missing args to the prefix arg
+; Alternatively, must make provide-prefix-argument do something hairy.
+
+(defun >> (val count)
+  (lsh val (- count)))
+(defun novalue ()
+  nil)
+
+(defun ml-not (arg)
+  (if (zerop arg) 1 0))
+
+(defun provide-prefix-arg (arg form)
+  (funcall (car form) arg))
+
+(defun define-keymap (name)
+  (fset (intern name) (make-keymap)))
+
+(defun ml-use-local-map (name)
+  (use-local-map (intern (concat name "-map"))))
+
+(defun ml-use-global-map (name)
+  (use-global-map (intern (concat name "-map"))))
+
+(defun local-bind-to-key (name key)
+  (or (current-local-map)
+      (use-local-map (make-keymap)))
+  (define-key (current-local-map)
+    (if (integerp key)
+	(if (>= key 128)
+	    (concat (char-to-string meta-prefix-char)
+		    (char-to-string (- key 128)))
+	  (char-to-string key))
+      key)
+    (intern name)))
+
+(defun bind-to-key (name key)
+  (define-key global-map (if (integerp key) (char-to-string key) key)
+    (intern name)))
+
+(defun ml-autoload (name file)
+  (autoload (intern name) file))
+
+(defun ml-define-string-macro (name defn)
+  (fset (intern name) defn))
+
+(defun push-back-character (char)
+  (setq unread-command-event (character-to-event char)))
+
+(defun to-col (column)
+  (indent-to column 0))
+
+(defmacro is-bound (&rest syms)
+  (cons 'and (mapcar (function (lambda (sym) (list 'boundp (list 'quote sym)))) syms)))
+
+(defmacro declare-global (&rest syms)
+  (cons 'progn (mapcar (function (lambda (sym) (list 'defvar sym nil))) syms)))
+
+(defmacro error-occurred (&rest body)
+  (list 'condition-case nil (cons 'progn (append body '(nil))) '(error t)))
+
+(defun return-prefix-argument (value)
+  (setq prefix-arg value))
+
+(defun ml-prefix-argument ()
+  (cond ((null current-prefix-arg)
+         1)
+        ((listp current-prefix-arg)
+         (car current-prefix-arg))
+        ((eq current-prefix-arg '-)
+         -1)
+	(t
+         current-prefix-arg)))
+
+(defun ml-print (varname)
+  (interactive "vPrint variable: ")
+  (if (boundp varname)
+      (message "%s => %s" (symbol-name varname) (symbol-value varname))
+    (message "%s has no value" (symbol-name varname))))
+
+(defun ml-set (str val) (set (intern str) val))
+
+(defun ml-message (&rest args) (message "%s" (apply 'concat args)))
+
+(defun kill-to-end-of-line ()
+  (ml-prefix-argument-loop
+    (if (eolp)
+	(kill-region (point) (1+ (point)))
+      (kill-region (point) (if (search-forward ?\n nil t)
+			       (1- (point)) (point-max))))))
+
+(defun set-auto-fill-hook (arg)
+  (setq auto-fill-function (intern arg)))
+
+(defun auto-execute (function pattern)
+  (if (/= (aref pattern 0) ?*)
+      (error "Only patterns starting with * supported in auto-execute"))
+  (setq auto-mode-alist (cons (cons (concat "\\." (substring pattern 1)
+					    "\\'")
+				    function)
+			      auto-mode-alist)))
+
+(defun move-to-comment-column ()
+  (indent-to comment-column))
+
+(defun erase-region ()
+  (delete-region (point) (mark)))
+
+(defun delete-region-to-buffer (bufname)
+  (copy-to-buffer bufname (point) (mark))
+  (delete-region (point) (mark)))
+
+(defun copy-region-to-buffer (bufname)
+  (copy-to-buffer bufname (point) (mark)))
+
+(defun append-region-to-buffer (bufname)
+  (append-to-buffer bufname (point) (mark)))
+
+(defun prepend-region-to-buffer (bufname)
+  (prepend-to-buffer bufname (point) (mark)))
+
+(defun delete-next-character ()
+  (delete-char (ml-prefix-argument)))
+
+(defun delete-next-word ()
+  (delete-region (point)
+		 (progn (forward-word (ml-prefix-argument)) (point))))
+
+(defun delete-previous-word ()
+  (delete-region (point)
+		 (progn (backward-word (ml-prefix-argument)) (point))))
+
+(defun delete-previous-character ()
+  (delete-backward-char (ml-prefix-argument)))
+
+(defun forward-character ()
+  (forward-char (ml-prefix-argument)))
+
+(defun backward-character ()
+  (backward-char (ml-prefix-argument)))
+
+(defun ml-newline ()
+  (newline (ml-prefix-argument)))
+
+(defun ml-next-line ()
+  (next-line (ml-prefix-argument)))
+
+(defun ml-previous-line ()
+  (previous-line (ml-prefix-argument)))
+
+(defun delete-to-kill-buffer ()
+  (kill-region (point) (mark)))
+
+(defun narrow-region ()
+  (narrow-to-region (point) (mark)))
+
+(defun ml-newline-and-indent ()
+  (let ((column (current-indentation)))
+    (newline (ml-prefix-argument))
+    (indent-to column)))
+
+(defun newline-and-backup ()
+  (open-line (ml-prefix-argument)))
+
+(defun quote-char ()
+  (quoted-insert (ml-prefix-argument)))
+
+(defun ml-current-column ()
+  (1+ (current-column)))
+
+(defun ml-current-indent ()
+  (1+ (current-indentation)))
+
+(defun region-around-match (&optional n)
+  (set-mark (match-beginning n))
+  (goto-char (match-end n)))
+
+(defun region-to-string ()
+  (buffer-substring (min (point) (mark)) (max (point) (mark))))
+
+(defun use-abbrev-table (name)
+  (let ((symbol (intern (concat name "-abbrev-table"))))
+    (or (boundp symbol)
+	(define-abbrev-table symbol nil))
+    (symbol-value symbol)))
+
+(defun define-hooked-local-abbrev (name exp hook)
+  (define-abbrev (or local-abbrev-table
+                     (error "Major mode has no abbrev table"))
+    (downcase name)
+    exp (intern hook)))
+
+(defun define-hooked-global-abbrev (name exp hook)
+  (define-abbrev global-abbrev-table (downcase name)
+    exp (intern hook)))
+
+(defun case-word-lower ()
+  (ml-casify-word 'downcase-region))
+
+(defun case-word-upper ()
+  (ml-casify-word 'upcase-region))
+
+(defun case-word-capitalize ()
+  (ml-casify-word 'capitalize-region))
+
+(defun ml-casify-word (fun)
+  (save-excursion
+   (forward-char 1)
+   (forward-word -1)
+   (funcall fun (point)
+	    (progn (forward-word (ml-prefix-argument))
+		   (point)))))
+
+(defun case-region-lower ()
+  (downcase-region (point) (mark)))
+
+(defun case-region-upper ()
+  (upcase-region (point) (mark)))
+
+(defun case-region-capitalize ()
+  (capitalize-region (point) (mark)))
+
+(defvar saved-command-line-args nil)
+
+(defun argc ()
+  (or saved-command-line-args
+      (setq saved-command-line-args command-line-args
+	    command-line-args ()))
+  (length command-line-args))
+
+(defun argv (i)
+  (or saved-command-line-args
+      (setq saved-command-line-args command-line-args
+	    command-line-args ()))
+  (nth i saved-command-line-args))
+
+(defun invisible-argc ()
+  (length (or saved-command-line-args
+	      command-line-args)))
+
+(defun invisible-argv (i)
+  (nth i (or saved-command-line-args
+	     command-line-args)))
+
+(defun exit-emacs ()
+  (interactive)
+  (condition-case ()
+      (exit-recursive-edit)
+    (error (kill-emacs))))
+
+;; Lisp function buffer-size returns total including invisible;
+;; mocklisp wants just visible.
+(defun ml-buffer-size ()
+  (- (point-max) (point-min)))
+
+(defun previous-command ()
+  last-command)
+
+(defun beginning-of-window ()
+  (goto-char (window-start)))
+
+(defun end-of-window ()
+  (goto-char (window-start))
+  (vertical-motion (- (window-height) 2)))
+
+(defun ml-search-forward (string)
+  (search-forward string nil nil (ml-prefix-argument)))
+
+(defun ml-re-search-forward (string)
+  (re-search-forward string nil nil (ml-prefix-argument)))
+
+(defun ml-search-backward (string)
+  (search-backward string nil nil (ml-prefix-argument)))
+
+(defun ml-re-search-backward (string)
+  (re-search-backward string nil nil (ml-prefix-argument)))
+
+(defvar use-users-shell 1
+  "Mocklisp compatibility variable; 1 means use shell from SHELL env var.
+0 means use /bin/sh.")
+
+(defvar use-csh-option-f 1
+  "Mocklisp compatibility variable; 1 means pass -f when calling csh.")
+
+(defun filter-region (command)
+  (let* ((shell (if (/= use-users-shell 0) shell-file-name "/bin/sh"))
+	 (csh (equal (file-name-nondirectory shell) "csh")))
+    (call-process-region (point) (mark) shell t t nil
+			 (if (and csh use-csh-option-f) "-cf" "-c")
+			 (concat "exec " command))))
+
+(defun execute-monitor-command (command)
+  (let* ((shell (if (/= use-users-shell 0) shell-file-name "/bin/sh"))
+	 (csh (equal (file-name-nondirectory shell) "csh")))
+    (call-process shell nil t t
+		  (if (and csh use-csh-option-f) "-cf" "-c")
+		  (concat "exec " command))))
+
+(defun use-syntax-table (name)
+  (set-syntax-table (symbol-value (intern (concat name "-syntax-table")))))
+
+(defun line-to-top-of-window ()
+  (recenter (1- (ml-prefix-argument))))
+
+(defun ml-previous-page (&optional arg)
+  (let ((count (or arg (ml-prefix-argument))))
+    (while (> count 0)
+      (scroll-down nil)
+      (setq count (1- count)))
+    (while (< count 0)
+      (scroll-up nil)
+      (setq count (1+ count)))))
+
+(defun ml-next-page ()
+  (ml-previous-page (- (ml-prefix-argument))))
+
+(defun page-next-window (&optional arg)
+  (let ((count (or arg (ml-prefix-argument))))
+    (while (> count 0)
+      (scroll-other-window nil)
+      (setq count (1- count)))
+    (while (< count 0)
+      (scroll-other-window '-)
+      (setq count (1+ count)))))
+
+(defun ml-next-window ()
+  (select-window (next-window)))
+
+(defun ml-previous-window ()
+  (select-window (previous-window)))
+
+(defun scroll-one-line-up ()
+  (scroll-up (ml-prefix-argument)))
+
+(defun scroll-one-line-down ()
+  (scroll-down (ml-prefix-argument)))
+
+(defun split-current-window ()
+  (split-window (selected-window)))
+
+(defun last-key-struck () last-command-char)
+
+(defun execute-mlisp-line (string)
+  (eval (read string)))
+
+(defun move-dot-to-x-y (x y)
+  (goto-char (window-start (selected-window)))
+  (vertical-motion (1- y))
+  (move-to-column (1- x)))
+
+(defun ml-modify-syntax-entry (string)
+  (let ((i 5)
+	(len (length string))
+	(datastring (substring string 0 2)))
+    (if (= (aref string 0) ?\-)
+	(aset datastring 0 ?\ ))
+    (if (= (aref string 2) ?\{)
+	(if (= (aref string 4) ?\ )
+	    (aset datastring 0 ?\<)
+	  (error "Two-char comment delimiter: use modify-syntax-entry directly")))
+    (if (= (aref string 3) ?\})
+	(if (= (aref string 4) ?\ )
+	    (aset datastring 0 ?\>)
+	  (error "Two-char comment delimiter: use modify-syntax-entry directly")))
+    (while (< i len)
+      (modify-syntax-entry (aref string i) datastring)
+      (setq i (1+ i))
+      (if (and (< i len)
+	       (= (aref string i) ?\-))
+	  (let ((c (aref string (1- i)))
+		(lim (aref string (1+ i))))
+	    (while (<= c lim)
+	      (modify-syntax-entry c datastring)
+	      (setq c (1+ c)))
+	    (setq i (+ 2 i)))))))
+
+
+
+(defun ml-substr (string from to)
+  (let ((length (length string)))
+    (if (< from 0) (setq from (+ from length)))
+    (if (< to 0) (setq to (+ to length)))
+    (substring string from (+ from to))))
+
+
+(defun ml-nargs ()
+  "Number of arguments to currently executing mocklisp function."
+  (if (eq mocklisp-arguments 'interactive)
+      0
+    (length mocklisp-arguments)))
+
+(defun ml-arg (n prompt)
+  "Argument number N to currently executing mocklisp function."
+  (if (eq mocklisp-arguments 'interactive)
+      (read-from-minibuffer prompt)
+    ;; Mocklisp likes to be origin 1
+    (elt mocklisp-arguments (1- n))))
+
+(defun ml-interactive ()
+  "True if currently executing mocklisp function was called interactively."
+  (eq mocklisp-arguments 'interactive))
+
+;; Now in subr.el, because too many loser call it.
+;(defun insert-string (&rest args)
+;  "Mocklisp-compatibility insert function.
+;Like the function `insert' except that any argument that is a number
+;is converted into a string by expressing it in decimal.  (Yuck!!)"
+;  (while args
+;    (let ((arg (car args)))
+;      (if (integerp arg)
+;          (insert (number-to-string arg))
+;	(insert arg))
+;      (setq args (cdr args)))))
+
+(defun ml-concat (&rest args)
+  (let ((newargs nil) this)
+    (while args
+      (setq this (car args))
+      (if (numberp this)
+	  (setq this (number-to-string this)))
+      (setq newargs (cons this newargs)
+	    args (cdr args)))
+    (apply 'concat (nreverse newargs))))
+
+
+;;; Lose, please.  None of these should be used in non-automatically-converted
+;;; code, so issue compilation warnings in case someone is using them because
+;;; they don't know any better.
+
+(make-obsolete 'read-no-blanks-input 'read-string)
+(make-obsolete 'declare-buffer-specific 'make-variable-buffer-local)
+(make-obsolete '>> 'lsh)
+(make-obsolete 'novalue 'ignore)
+(make-obsolete 'define-keymap "use (fset 'symbol (make-keymap))")
+(make-obsolete 'local-bind-to-key 'local-set-key)
+(make-obsolete 'bind-to-key 'global-set-key)
+(make-obsolete 'to-col 'indent-to)
+(make-obsolete 'is-bound 'boundp)
+(make-obsolete 'declare-global 'defvar)
+(make-obsolete 'error-occurred 'condition-case)
+(make-obsolete 'set-auto-fill-hook "set variable auto-fill-function instead")
+(make-obsolete 'auto-execute "set variable auto-mode-alist instead")
+(make-obsolete 'move-to-comment-column "use (indent-to comment-column)")
+(make-obsolete 'erase-region 'delete-region)
+(make-obsolete 'delete-region-to-buffer "use copy-to-buffer and delete-region")
+(make-obsolete 'copy-region-to-buffer 'copy-to-buffer)
+(make-obsolete 'append-region-to-buffer 'append-to-buffer)
+(make-obsolete 'prepend-region-to-buffer 'prepend-to-buffer)
+(make-obsolete 'delete-next-character 'delete-char)
+(make-obsolete 'forward-character 'forward-char)
+(make-obsolete 'backward-character 'backward-char)
+(make-obsolete 'delete-to-kill-buffer 'kill-region)
+(make-obsolete 'narrow-region 'narrow-to-region)
+(make-obsolete 'newline-and-backup 'open-line)
+(make-obsolete 'quote-char 'quoted-insert)
+(make-obsolete 'region-to-string 'buffer-substring)
+(make-obsolete 'define-hooked-local-abbrev 'define-abbrev)
+(make-obsolete 'define-hooked-global-abbrev 'define-abbrev)
+(make-obsolete 'filter-region 'call-process-region)
+(make-obsolete 'execute-monitor-command 'call-process)
+(make-obsolete 'use-syntax-table 'set-syntax-table)
+(make-obsolete 'line-to-top-of-window 'recenter)
+(make-obsolete 'insert-string 'insert)
+
+(provide 'mlsupport)
+
+;;; mlsupport.el ends here