;; Run-time support for mocklisp code. 
;; Copyright (C) 1985 Richard M. Stallman. 
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;; This file is part of GNU Emacs. 
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;; GNU Emacs is distributed in the hope that it will be useful, 
;; but without any warranty.  No author or distributor 
;; accepts responsibility to anyone for the consequences of using it 
;; or for whether it serves any particular purpose or works at all, 
;; unless he says so in writing. 
 
;; Everyone is granted permission to copy, modify and redistribute 
;; GNU Emacs, but only under the conditions described in the 
;; document "GNU Emacs copying permission notice".   An exact copy 
;; of the document is supposed to have been given to you along with 
;; GNU Emacs so that you can know how you may redistribute it all. 
;; It should be in a file named COPYING.  Among other things, the 
;; copyright notice and this notice must be preserved on all copies. 
 
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(defun alias (ml-name lisp-name) 
  (fset ml-name (symbol-function lisp-name))) 
 
(defun declare-buffer-specific (&quote vars) 
  (while vars 
    (make-variable-buffer-local (car vars)))) 
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(defun setq-default (&quote args) 
  (set-default (car args) (eval (car (cdr args))))) 
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(defun ml-set-default (varname value) 
  (set-default (intern varname) value)) 
 
;send-string-to-terminal 
;  Take a string and output directly to stdout. 
 
; Lossage: must make various things default missing args to the prefix arg 
; Alternatively, must make provide-prefix-argument do something hairy. 
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(defun '>> (val count) (lsh val (- count))) 
(defun novalue () nil) 
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(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) (char-to-string key) key) 
    (intern name))) 
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(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)) 
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(defun ml-define-string-macro (name defn) 
  (fset (intern name) defn)) 
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(defun push-back-character (char) 
  (setq unread-command-char char)) 
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(defun to-col (column) 
  (indent-to column 0)) 
 
(defun is-bound (&quote syms) 
  (while (and syms (boundp (car syms))) 
    (setq syms (cdr syms))) 
  (not syms)) 
 
(defun declare-global (&quote syms) 
  (while syms 
    (set (car syms) nil) 
    (put (car syms) 'variable-documentation "Defined by mocklisp; documentation not given"))) 
 
(defun error-occurred (&quote body) 
  (condition-case () 
      (progn 
       (while body 
	 (eval (car body)) (setq body (cdr body))) 
       nil) 
    (error t))) 
 
(defun return-prefix-argument (value) 
  (setq prefix-arg value)) 
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(defun ml-prefix-argument () 
  (if (null current-prefix-arg) 1 
    (if (listp current-prefix-arg) (car current-prefix-arg) 
      (if (eq current-prefix-arg '-) -1 
	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)))) 
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(defun ml-set (str val) (set (intern str) val)) 
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(defun ml-message (&rest args) (message "%s" (apply 'concat args))) 
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(defun kill-to-end-of-line () 
  (ml-prefix-argument-loop 
    (if (eolp) (kill-region (dot) (1+ (dot)))))) 
 
(defun set-auto-fill-hook (arg) 
  (setq auto-fill-hook (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 (substring pattern 1) function) 
	      auto-mode-alist))) 
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(defun move-to-comment-column () 
  (indent-to comment-column)) 
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(defun ml-alias (ml-name lisp-name) 
  (fset ml-name (symbol-function lisp-name))) 
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(ml-alias '!= '/=) 
(ml-alias '& 'logand) 
(ml-alias '| 'logior) 
(ml-alias '^ 'logxor) 
(ml-alias '! 'lognot) 
(ml-alias '<< 'lsh) 
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(defun erase-region () 
  (delete-region (dot) (mark))) 
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(defun delete-region-to-buffer (bufname) 
  (copy-to-buffer name (dot) (mark)) 
  (delete-region (dot) (mark))) 
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(defun copy-region-to-buffer (bufname) 
  (copy-to-buffer name (dot) (mark))) 
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(defun append-region-to-buffer (bufname) 
  (append-to-buffer name (dot) (mark))) 
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(defun prepend-region-to-buffer (bufname) 
  (prepend-to-buffer name (dot) (mark))) 
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(defun delete-next-character () 
  (delete-char (ml-prefix-argument))) 
 
(defun delete-next-word () 
  (delete-region (dot) (progn (forward-word (ml-prefix-argument)) (dot)))) 
 
(defun delete-previous-word () 
  (delete-region (dot) (progn (backward-word (ml-prefix-argument)) (dot)))) 
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(defun delete-previous-character () 
  (delete-backward-char (ml-prefix-argument))) 
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(defun forward-character () 
  (forward-char (ml-prefix-argument))) 
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(defun backward-character () 
  (backward-char (ml-prefix-argument))) 
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(defun ml-newline () 
  (newline (ml-prefix-argument))) 
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(defun ml-next-line () 
  (next-line (ml-prefix-argument))) 
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(defun ml-previous-line () 
  (previous-line (ml-prefix-argument))) 
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(defun delete-to-kill-buffer () 
  (kill-region (dot) (mark))) 
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(defun narrow-region () 
  (narrow-to-region (dot) (mark))) 
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(defun ml-newline-and-indent () 
  (let ((column (current-indentation))) 
    (newline (ml-prefix-argument)) 
    (indent-to column))) 
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(defun newline-and-backup () 
  (open-line (ml-prefix-argument))) 
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(defun quote-char () 
  (quoted-insert (ml-prefix-argument))) 
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(defun ml-current-column () 
  (1+ (current-column))) 
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(defun ml-current-indent () 
  (1+ (current-indent))) 
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(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-local-abbrev name exp (intern hook))) 
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(defun define-hooked-global-abbrev (name exp hook) 
  (define-global-abbrev name exp (intern hook))) 
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(defun case-word-lower () 
  (ml-casify-word 'downcase-region)) 
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(defun case-word-upper () 
  (ml-casify-word 'upcase-region)) 
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(defun case-word-capitalize () 
  (ml-casify-word 'capitalize-region)) 
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(defun ml-casify-word (fun) 
  (save-excursion 
   (forward-char 1) 
   (forward-word -1) 
   (funcall fun (dot) 
	    (progn (forward-word (ml-prefix-argument)) 
		   (dot))))) 
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(defun case-region-lower () 
  (downcase-region (dot) (mark))) 
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(defun case-region-upper () 
  (upcase-region (dot) (mark))) 
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(defun case-region-capitalize () 
  (capitalize-region (dot) (mark))) 
 
(defun argc () 
  (setq inhibit-command-line t) 
  (length command-line-args)) 
 
(defun argv (i) 
  (setq inhibit-command-line t) 
  (nth i command-line-args)) 
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(defun invisible-argc () 
  (length command-line-args)) 
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(defun invisible-argv (i) 
  (nth i command-line-args)) 
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(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 () 
  (- (dot-max) (dot-min))) 
 
(defun previous-command () 
  last-command) 
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(defun beginning-of-window () 
  (goto-char (window-start))) 
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(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))) 
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(defun ml-search-backward (string) 
  (search-backward string nil nil (ml-prefix-argument))) 
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(defun ml-re-search-backward (string) 
  (re-search-backward string nil nil (ml-prefix-argument))) 
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(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.") 
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(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 (dot) (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 (intern (concat name "-syntax-table")))) 
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(defun line-to-top-of-window () 
  (recenter-window (1- (ml-prefix-argument)))) 
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(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))))) 
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(defun ml-next-page () 
  (previous-page (- (ml-prefix-argument)))) 
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(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))))) 
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(defun ml-next-window () 
  (select-window (next-window))) 
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(defun ml-previous-window () 
  (select-window (previous-window))) 
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(defun scroll-one-line-up () 
  (scroll-up (ml-prefix-argument))) 
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(defun scroll-one-line-down () 
  (scroll-down (ml-prefix-argument))) 
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(defun split-current-window () 
  (split-window (selected-window))) 