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be010748 | 1 | ;;; cl-compat.el --- Common Lisp extensions for GNU Emacs Lisp (compatibility) |
fcd73769 | 2 | |
ba318903 | 3 | ;; Copyright (C) 1993, 2001-2014 Free Software Foundation, Inc. |
fcd73769 RS |
4 | |
5 | ;; Author: Dave Gillespie <daveg@synaptics.com> | |
6 | ;; Version: 2.02 | |
7 | ;; Keywords: extensions | |
2f1cc336 | 8 | ;; Obsolete-since: 23.3 |
fcd73769 RS |
9 | |
10 | ;; This file is part of GNU Emacs. | |
11 | ||
d6cba7ae | 12 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
fcd73769 | 13 | ;; it under the terms of the GNU General Public License as published by |
d6cba7ae GM |
14 | ;; the Free Software Foundation, either version 3 of the License, or |
15 | ;; (at your option) any later version. | |
fcd73769 RS |
16 | |
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
d6cba7ae | 23 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
fcd73769 | 24 | |
07b3798c | 25 | ;;; Commentary: |
fcd73769 | 26 | |
2f1cc336 GM |
27 | ;; This file has been obsolete since Emacs 23.3. |
28 | ||
fcd73769 RS |
29 | ;; These are extensions to Emacs Lisp that provide a degree of |
30 | ;; Common Lisp compatibility, beyond what is already built-in | |
31 | ;; in Emacs Lisp. | |
32 | ;; | |
33 | ;; This package was written by Dave Gillespie; it is a complete | |
34 | ;; rewrite of Cesar Quiroz's original cl.el package of December 1986. | |
35 | ;; | |
36 | ;; This package works with Emacs 18, Emacs 19, and Lucid Emacs 19. | |
37 | ;; | |
38 | ;; Bug reports, comments, and suggestions are welcome! | |
39 | ||
40 | ;; This file contains emulations of internal routines of the older | |
41 | ;; CL package which users may have called directly from their code. | |
42 | ;; Use (require 'cl-compat) to get these routines. | |
43 | ||
44 | ;; See cl.el for Change Log. | |
45 | ||
46 | ||
07b3798c | 47 | ;;; Code: |
fcd73769 | 48 | |
e3d95497 GM |
49 | ;; This used to be: |
50 | ;; (or (featurep 'cl) (require 'cl)) | |
51 | ;; which just has the effect of fooling the byte-compiler into not | |
52 | ;; loading cl when compiling. However, that leads to some bogus | |
53 | ;; compiler warnings. Loading cl when compiling cannot do any harm, | |
54 | ;; because for a long time bootstrap-emacs contained 'cl, due to being | |
55 | ;; dumped from uncompiled files that eval-when-compile'd cl. So every | |
56 | ;; file was compiled with 'cl loaded. | |
57 | (require 'cl) | |
fcd73769 RS |
58 | |
59 | ||
60 | ;;; Keyword routines not supported by new package. | |
61 | ||
62 | (defmacro defkeyword (x &optional doc) | |
63 | (list* 'defconst x (list 'quote x) (and doc (list doc)))) | |
64 | ||
fcd73769 RS |
65 | (defun keyword-of (sym) |
66 | (or (keywordp sym) (keywordp (intern (format ":%s" sym))))) | |
67 | ||
68 | ||
69 | ;;; Multiple values. Note that the new package uses a different | |
70 | ;;; convention for multiple values. The following definitions | |
71 | ;;; emulate the old convention; all function names have been changed | |
72 | ;;; by capitalizing the first letter: Values, Multiple-value-*, | |
73 | ;;; to avoid conflict with the new-style definitions in cl-macs. | |
74 | ||
fcd73769 RS |
75 | (defvar *mvalues-values* nil) |
76 | ||
77 | (defun Values (&rest val-forms) | |
78 | (setq *mvalues-values* val-forms) | |
79 | (car val-forms)) | |
80 | ||
81 | (defun Values-list (val-forms) | |
82 | (apply 'values val-forms)) | |
83 | ||
84 | (defmacro Multiple-value-list (form) | |
85 | (list 'let* (list '(*mvalues-values* nil) (list '*mvalues-temp* form)) | |
86 | '(or (and (eq *mvalues-temp* (car *mvalues-values*)) *mvalues-values*) | |
87 | (list *mvalues-temp*)))) | |
88 | ||
89 | (defmacro Multiple-value-call (function &rest args) | |
f291fe60 | 90 | (declare (indent 1)) |
fcd73769 RS |
91 | (list 'apply function |
92 | (cons 'append | |
93 | (mapcar (function (lambda (x) (list 'Multiple-value-list x))) | |
94 | args)))) | |
95 | ||
96 | (defmacro Multiple-value-bind (vars form &rest body) | |
f291fe60 | 97 | (declare (indent 2)) |
fcd73769 RS |
98 | (list* 'multiple-value-bind vars (list 'Multiple-value-list form) body)) |
99 | ||
100 | (defmacro Multiple-value-setq (vars form) | |
f291fe60 | 101 | (declare (indent 2)) |
fcd73769 RS |
102 | (list 'multiple-value-setq vars (list 'Multiple-value-list form))) |
103 | ||
104 | (defmacro Multiple-value-prog1 (form &rest body) | |
f291fe60 | 105 | (declare (indent 1)) |
fcd73769 RS |
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) | |
ab3d4bb2 | 149 | (let ((newsyms (mapcar (lambda (x) (make-symbol "--cl-var--")) oldforms))) |
fcd73769 RS |
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 | ||
7187be8b GM |
195 | ;; Local variables: |
196 | ;; byte-compile-warnings: (not cl-functions) | |
197 | ;; End: | |
198 | ||
fcd73769 | 199 | ;;; cl-compat.el ends here |