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+ − 1 ;;; cl-compat.el --- Common Lisp extensions for XEmacs Lisp (compatibility)
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+ − 2
+ − 3 ;; Copyright (C) 1993 Free Software Foundation, Inc.
+ − 4
+ − 5 ;; Author: Dave Gillespie <daveg@synaptics.com>
+ − 6 ;; Version: 2.02
+ − 7 ;; Keywords: extensions
+ − 8
+ − 9 ;; This file is part of XEmacs.
+ − 10
+ − 11 ;; XEmacs is free software; you can redistribute it and/or modify it
+ − 12 ;; under the terms of the GNU General Public License as published by
+ − 13 ;; the Free Software Foundation; either version 2, or (at your option)
+ − 14 ;; any later version.
+ − 15
+ − 16 ;; XEmacs is distributed in the hope that it will be useful, but
+ − 17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
+ − 18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ − 19 ;; General Public License for more details.
+ − 20
+ − 21 ;; You should have received a copy of the GNU General Public License
+ − 22 ;; along with XEmacs; see the file COPYING. If not, write to the Free
+ − 23 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ − 24 ;; 02111-1307, USA.
+ − 25
+ − 26 ;;; Synched up with: FSF 19.34.
+ − 27
+ − 28 ;;; Commentary:
+ − 29
+ − 30 ;; These are extensions to Emacs Lisp that provide a degree of
+ − 31 ;; Common Lisp compatibility, beyond what is already built-in
+ − 32 ;; in Emacs Lisp.
+ − 33 ;;
+ − 34 ;; This package was written by Dave Gillespie; it is a complete
+ − 35 ;; rewrite of Cesar Quiroz's original cl.el package of December 1986.
+ − 36 ;;
+ − 37 ;; This package works with Emacs 18, Emacs 19, and XEmacs/Lucid Emacs 19.
+ − 38 ;;
+ − 39 ;; Bug reports, comments, and suggestions are welcome!
+ − 40
+ − 41 ;; This file contains emulations of internal routines of the older
+ − 42 ;; CL package which users may have called directly from their code.
+ − 43 ;; Use (require 'cl-compat) to get these routines.
+ − 44
+ − 45 ;; See cl.el for Change Log.
+ − 46
+ − 47
+ − 48 ;;; Code:
+ − 49
+ − 50 ;; Require at load-time, but not when compiling cl-compat.
+ − 51 (or (featurep 'cl) (require 'cl))
+ − 52
+ − 53
+ − 54 ;;; Keyword routines not supported by new package.
+ − 55
+ − 56 (defmacro defkeyword (x &optional doc)
+ − 57 (list* 'defconst x (list 'quote x) (and doc (list doc))))
+ − 58
406
+ − 59 ;; XEmacs change.
+ − 60 ;; We have built-in function.
+ − 61 ;;(defun keywordp (sym)
+ − 62 ;; (and (symbolp sym) (eq (aref (symbol-name sym) 0) ?\:) (set sym sym)))
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+ − 63
+ − 64 (defun keyword-of (sym)
+ − 65 (or (keywordp sym) (keywordp (intern (format ":%s" sym)))))
+ − 66
+ − 67
+ − 68 ;;; Multiple values. Note that the new package uses a different
+ − 69 ;;; convention for multiple values. The following definitions
+ − 70 ;;; emulate the old convention; all function names have been changed
+ − 71 ;;; by capitalizing the first letter: Values, Multiple-value-*,
+ − 72 ;;; to avoid conflict with the new-style definitions in cl-macs.
+ − 73
+ − 74 (put 'Multiple-value-bind 'lisp-indent-function 2)
+ − 75 (put 'Multiple-value-setq 'lisp-indent-function 2)
+ − 76 (put 'Multiple-value-call 'lisp-indent-function 1)
+ − 77 (put 'Multiple-value-prog1 'lisp-indent-function 1)
+ − 78
+ − 79 (defvar *mvalues-values* nil)
+ − 80
+ − 81 (defun Values (&rest val-forms)
+ − 82 (setq *mvalues-values* val-forms)
+ − 83 (car val-forms))
+ − 84
+ − 85 (defun Values-list (val-forms)
+ − 86 (apply 'values val-forms))
+ − 87
+ − 88 (defmacro Multiple-value-list (form)
+ − 89 (list 'let* (list '(*mvalues-values* nil) (list '*mvalues-temp* form))
+ − 90 '(or (and (eq *mvalues-temp* (car *mvalues-values*)) *mvalues-values*)
+ − 91 (list *mvalues-temp*))))
+ − 92
+ − 93 (defmacro Multiple-value-call (function &rest args)
+ − 94 (list 'apply function
+ − 95 (cons 'append
+ − 96 (mapcar (function (lambda (x) (list 'Multiple-value-list x)))
+ − 97 args))))
+ − 98
+ − 99 (defmacro Multiple-value-bind (vars form &rest body)
+ − 100 (list* 'multiple-value-bind vars (list 'Multiple-value-list form) body))
+ − 101
+ − 102 (defmacro Multiple-value-setq (vars form)
+ − 103 (list 'multiple-value-setq vars (list 'Multiple-value-list form)))
+ − 104
+ − 105 (defmacro Multiple-value-prog1 (form &rest body)
+ − 106 (list 'prog1 form (list* 'let '((*mvalues-values* nil)) body)))
+ − 107
+ − 108
+ − 109 ;;; Routines for parsing keyword arguments.
+ − 110
+ − 111 (defun build-klist (arglist keys &optional allow-others)
+ − 112 (let ((res (Multiple-value-call 'mapcar* 'cons (unzip-lists arglist))))
+ − 113 (or allow-others
+ − 114 (let ((bad (set-difference (mapcar 'car res) keys)))
+ − 115 (if bad (error "Bad keywords: %s not in %s" bad keys))))
+ − 116 res))
+ − 117
+ − 118 (defun extract-from-klist (klist key &optional def)
+ − 119 (let ((res (assq key klist))) (if res (cdr res) def)))
+ − 120
+ − 121 (defun keyword-argument-supplied-p (klist key)
+ − 122 (assq key klist))
+ − 123
+ − 124 (defun elt-satisfies-test-p (item elt klist)
+ − 125 (let ((test-not (cdr (assq ':test-not klist)))
+ − 126 (test (cdr (assq ':test klist)))
+ − 127 (key (cdr (assq ':key klist))))
+ − 128 (if key (setq elt (funcall key elt)))
+ − 129 (if test-not (not (funcall test-not item elt))
+ − 130 (funcall (or test 'eql) item elt))))
+ − 131
+ − 132
+ − 133 ;;; Rounding functions with old-style multiple value returns.
+ − 134
+ − 135 (defun cl-floor (a &optional b) (Values-list (floor* a b)))
+ − 136 (defun cl-ceiling (a &optional b) (Values-list (ceiling* a b)))
+ − 137 (defun cl-round (a &optional b) (Values-list (round* a b)))
+ − 138 (defun cl-truncate (a &optional b) (Values-list (truncate* a b)))
+ − 139
+ − 140 (defun safe-idiv (a b)
+ − 141 (let* ((q (/ (abs a) (abs b)))
+ − 142 (s (* (signum a) (signum b))))
+ − 143 (Values q (- a (* s q b)) s)))
+ − 144
+ − 145
+ − 146 ;; Internal routines.
+ − 147
+ − 148 (defun pair-with-newsyms (oldforms)
+ − 149 (let ((newsyms (mapcar (function (lambda (x) (gensym))) oldforms)))
+ − 150 (Values (mapcar* 'list newsyms oldforms) newsyms)))
+ − 151
+ − 152 (defun zip-lists (evens odds)
+ − 153 (mapcan 'list evens odds))
+ − 154
+ − 155 (defun unzip-lists (list)
+ − 156 (let ((e nil) (o nil))
+ − 157 (while list
+ − 158 (setq e (cons (car list) e) o (cons (cadr list) o) list (cddr list)))
+ − 159 (Values (nreverse e) (nreverse o))))
+ − 160
+ − 161 (defun reassemble-argslists (list)
+ − 162 (let ((n (apply 'min (mapcar 'length list))) (res nil))
+ − 163 (while (>= (setq n (1- n)) 0)
+ − 164 (setq res (cons (mapcar (function (lambda (x) (elt x n))) list) res)))
+ − 165 res))
+ − 166
+ − 167 (defun duplicate-symbols-p (list)
+ − 168 (let ((res nil))
+ − 169 (while list
+ − 170 (if (memq (car list) (cdr list)) (setq res (cons (car list) res)))
+ − 171 (setq list (cdr list)))
+ − 172 res))
+ − 173
+ − 174
+ − 175 ;;; Setf internals.
+ − 176
+ − 177 (defun setnth (n list x)
+ − 178 (setcar (nthcdr n list) x))
+ − 179
+ − 180 (defun setnthcdr (n list x)
+ − 181 (setcdr (nthcdr (1- n) list) x))
+ − 182
+ − 183 (defun setelt (seq n x)
+ − 184 (if (consp seq) (setcar (nthcdr n seq) x) (aset seq n x)))
+ − 185
+ − 186
+ − 187 ;;; Functions omitted: case-clausify, check-do-stepforms, check-do-endforms,
+ − 188 ;;; extract-do-inits, extract-do[*]-steps, select-stepping-forms,
+ − 189 ;;; elt-satisfies-if[-not]-p, with-keyword-args, mv-bind-clausify,
+ − 190 ;;; all names with embedded `$'.
+ − 191
+ − 192
+ − 193 (provide 'cl-compat)
+ − 194
+ − 195 ;;; cl-compat.el ends here
+ − 196