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be010748 | 1 | ;;; cl-compat.el --- Common Lisp extensions for GNU Emacs Lisp (compatibility) |
fcd73769 | 2 | |
2f1cc336 | 3 | ;; Copyright (C) 1993, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, |
5df4f04c | 4 | ;; 2009, 2010, 2011 Free Software Foundation, Inc. |
fcd73769 RS |
5 | |
6 | ;; Author: Dave Gillespie <daveg@synaptics.com> | |
7 | ;; Version: 2.02 | |
8 | ;; Keywords: extensions | |
2f1cc336 | 9 | ;; Obsolete-since: 23.3 |
fcd73769 RS |
10 | |
11 | ;; This file is part of GNU Emacs. | |
12 | ||
d6cba7ae | 13 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
fcd73769 | 14 | ;; it under the terms of the GNU General Public License as published by |
d6cba7ae GM |
15 | ;; the Free Software Foundation, either version 3 of the License, or |
16 | ;; (at your option) any later version. | |
fcd73769 RS |
17 | |
18 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
19 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | ;; GNU General Public License for more details. | |
22 | ||
23 | ;; You should have received a copy of the GNU General Public License | |
d6cba7ae | 24 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
fcd73769 | 25 | |
07b3798c | 26 | ;;; Commentary: |
fcd73769 | 27 | |
2f1cc336 GM |
28 | ;; This file has been obsolete since Emacs 23.3. |
29 | ||
fcd73769 RS |
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 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 | ||
07b3798c | 48 | ;;; Code: |
fcd73769 | 49 | |
e3d95497 GM |
50 | ;; This used to be: |
51 | ;; (or (featurep 'cl) (require 'cl)) | |
52 | ;; which just has the effect of fooling the byte-compiler into not | |
53 | ;; loading cl when compiling. However, that leads to some bogus | |
54 | ;; compiler warnings. Loading cl when compiling cannot do any harm, | |
55 | ;; because for a long time bootstrap-emacs contained 'cl, due to being | |
56 | ;; dumped from uncompiled files that eval-when-compile'd cl. So every | |
57 | ;; file was compiled with 'cl loaded. | |
58 | (require 'cl) | |
fcd73769 RS |
59 | |
60 | ||
61 | ;;; Keyword routines not supported by new package. | |
62 | ||
63 | (defmacro defkeyword (x &optional doc) | |
64 | (list* 'defconst x (list 'quote x) (and doc (list doc)))) | |
65 | ||
fcd73769 RS |
66 | (defun keyword-of (sym) |
67 | (or (keywordp sym) (keywordp (intern (format ":%s" sym))))) | |
68 | ||
69 | ||
70 | ;;; Multiple values. Note that the new package uses a different | |
71 | ;;; convention for multiple values. The following definitions | |
72 | ;;; emulate the old convention; all function names have been changed | |
73 | ;;; by capitalizing the first letter: Values, Multiple-value-*, | |
74 | ;;; to avoid conflict with the new-style definitions in cl-macs. | |
75 | ||
fcd73769 RS |
76 | (defvar *mvalues-values* nil) |
77 | ||
78 | (defun Values (&rest val-forms) | |
79 | (setq *mvalues-values* val-forms) | |
80 | (car val-forms)) | |
81 | ||
82 | (defun Values-list (val-forms) | |
83 | (apply 'values val-forms)) | |
84 | ||
85 | (defmacro Multiple-value-list (form) | |
86 | (list 'let* (list '(*mvalues-values* nil) (list '*mvalues-temp* form)) | |
87 | '(or (and (eq *mvalues-temp* (car *mvalues-values*)) *mvalues-values*) | |
88 | (list *mvalues-temp*)))) | |
89 | ||
90 | (defmacro Multiple-value-call (function &rest args) | |
f291fe60 | 91 | (declare (indent 1)) |
fcd73769 RS |
92 | (list 'apply function |
93 | (cons 'append | |
94 | (mapcar (function (lambda (x) (list 'Multiple-value-list x))) | |
95 | args)))) | |
96 | ||
97 | (defmacro Multiple-value-bind (vars form &rest body) | |
f291fe60 | 98 | (declare (indent 2)) |
fcd73769 RS |
99 | (list* 'multiple-value-bind vars (list 'Multiple-value-list form) body)) |
100 | ||
101 | (defmacro Multiple-value-setq (vars form) | |
f291fe60 | 102 | (declare (indent 2)) |
fcd73769 RS |
103 | (list 'multiple-value-setq vars (list 'Multiple-value-list form))) |
104 | ||
105 | (defmacro Multiple-value-prog1 (form &rest body) | |
f291fe60 | 106 | (declare (indent 1)) |
fcd73769 RS |
107 | (list 'prog1 form (list* 'let '((*mvalues-values* nil)) body))) |
108 | ||
109 | ||
110 | ;;; Routines for parsing keyword arguments. | |
111 | ||
112 | (defun build-klist (arglist keys &optional allow-others) | |
113 | (let ((res (Multiple-value-call 'mapcar* 'cons (unzip-lists arglist)))) | |
114 | (or allow-others | |
115 | (let ((bad (set-difference (mapcar 'car res) keys))) | |
116 | (if bad (error "Bad keywords: %s not in %s" bad keys)))) | |
117 | res)) | |
118 | ||
119 | (defun extract-from-klist (klist key &optional def) | |
120 | (let ((res (assq key klist))) (if res (cdr res) def))) | |
121 | ||
122 | (defun keyword-argument-supplied-p (klist key) | |
123 | (assq key klist)) | |
124 | ||
125 | (defun elt-satisfies-test-p (item elt klist) | |
126 | (let ((test-not (cdr (assq ':test-not klist))) | |
127 | (test (cdr (assq ':test klist))) | |
128 | (key (cdr (assq ':key klist)))) | |
129 | (if key (setq elt (funcall key elt))) | |
130 | (if test-not (not (funcall test-not item elt)) | |
131 | (funcall (or test 'eql) item elt)))) | |
132 | ||
133 | ||
134 | ;;; Rounding functions with old-style multiple value returns. | |
135 | ||
136 | (defun cl-floor (a &optional b) (Values-list (floor* a b))) | |
137 | (defun cl-ceiling (a &optional b) (Values-list (ceiling* a b))) | |
138 | (defun cl-round (a &optional b) (Values-list (round* a b))) | |
139 | (defun cl-truncate (a &optional b) (Values-list (truncate* a b))) | |
140 | ||
141 | (defun safe-idiv (a b) | |
142 | (let* ((q (/ (abs a) (abs b))) | |
143 | (s (* (signum a) (signum b)))) | |
144 | (Values q (- a (* s q b)) s))) | |
145 | ||
146 | ||
147 | ;; Internal routines. | |
148 | ||
149 | (defun pair-with-newsyms (oldforms) | |
ab3d4bb2 | 150 | (let ((newsyms (mapcar (lambda (x) (make-symbol "--cl-var--")) oldforms))) |
fcd73769 RS |
151 | (Values (mapcar* 'list newsyms oldforms) newsyms))) |
152 | ||
153 | (defun zip-lists (evens odds) | |
154 | (mapcan 'list evens odds)) | |
155 | ||
156 | (defun unzip-lists (list) | |
157 | (let ((e nil) (o nil)) | |
158 | (while list | |
159 | (setq e (cons (car list) e) o (cons (cadr list) o) list (cddr list))) | |
160 | (Values (nreverse e) (nreverse o)))) | |
161 | ||
162 | (defun reassemble-argslists (list) | |
163 | (let ((n (apply 'min (mapcar 'length list))) (res nil)) | |
164 | (while (>= (setq n (1- n)) 0) | |
165 | (setq res (cons (mapcar (function (lambda (x) (elt x n))) list) res))) | |
166 | res)) | |
167 | ||
168 | (defun duplicate-symbols-p (list) | |
169 | (let ((res nil)) | |
170 | (while list | |
171 | (if (memq (car list) (cdr list)) (setq res (cons (car list) res))) | |
172 | (setq list (cdr list))) | |
173 | res)) | |
174 | ||
175 | ||
176 | ;;; Setf internals. | |
177 | ||
178 | (defun setnth (n list x) | |
179 | (setcar (nthcdr n list) x)) | |
180 | ||
181 | (defun setnthcdr (n list x) | |
182 | (setcdr (nthcdr (1- n) list) x)) | |
183 | ||
184 | (defun setelt (seq n x) | |
185 | (if (consp seq) (setcar (nthcdr n seq) x) (aset seq n x))) | |
186 | ||
187 | ||
188 | ;;; Functions omitted: case-clausify, check-do-stepforms, check-do-endforms, | |
189 | ;;; extract-do-inits, extract-do[*]-steps, select-stepping-forms, | |
190 | ;;; elt-satisfies-if[-not]-p, with-keyword-args, mv-bind-clausify, | |
191 | ;;; all names with embedded `$'. | |
192 | ||
193 | ||
194 | (provide 'cl-compat) | |
195 | ||
7187be8b GM |
196 | ;; Local variables: |
197 | ;; byte-compile-warnings: (not cl-functions) | |
198 | ;; End: | |
199 | ||
fcd73769 | 200 | ;;; cl-compat.el ends here |