1 | ;;; calist.el --- Condition functions |
---|
2 | |
---|
3 | ;; Copyright (C) 1998 Free Software Foundation, Inc. |
---|
4 | ;; Copyright (C) 1999 Electrotechnical Laboratory, JAPAN. |
---|
5 | ;; Licensed to the Free Software Foundation. |
---|
6 | |
---|
7 | ;; Author: MORIOKA Tomohiko <tomo@m17n.org> |
---|
8 | ;; Keywords: condition, alist, tree |
---|
9 | |
---|
10 | ;; This file is part of APEL (A Portable Emacs Library). |
---|
11 | |
---|
12 | ;; This program is free software; you can redistribute it and/or |
---|
13 | ;; modify it under the terms of the GNU General Public License as |
---|
14 | ;; published by the Free Software Foundation; either version 2, or (at |
---|
15 | ;; your option) any later version. |
---|
16 | |
---|
17 | ;; This program is distributed in the hope that it will be useful, but |
---|
18 | ;; WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
---|
20 | ;; General Public License for more details. |
---|
21 | |
---|
22 | ;; You should have received a copy of the GNU General Public License |
---|
23 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
---|
24 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
---|
25 | ;; Boston, MA 02111-1307, USA. |
---|
26 | |
---|
27 | ;;; Code: |
---|
28 | |
---|
29 | (eval-when-compile (require 'cl)) |
---|
30 | |
---|
31 | (require 'alist) |
---|
32 | |
---|
33 | (defvar calist-package-alist nil) |
---|
34 | (defvar calist-field-match-method-obarray nil) |
---|
35 | |
---|
36 | (defun find-calist-package (name) |
---|
37 | "Return a calist-package by NAME." |
---|
38 | (cdr (assq name calist-package-alist))) |
---|
39 | |
---|
40 | (defun define-calist-field-match-method (field-type function) |
---|
41 | "Set field-match-method for FIELD-TYPE to FUNCTION." |
---|
42 | (fset (intern (symbol-name field-type) calist-field-match-method-obarray) |
---|
43 | function)) |
---|
44 | |
---|
45 | (defun use-calist-package (name) |
---|
46 | "Make the symbols of package NAME accessible in the current package." |
---|
47 | (mapatoms (lambda (sym) |
---|
48 | (if (intern-soft (symbol-name sym) |
---|
49 | calist-field-match-method-obarray) |
---|
50 | (signal 'conflict-of-calist-symbol |
---|
51 | (list (format "Conflict of symbol %s"))) |
---|
52 | (if (fboundp sym) |
---|
53 | (define-calist-field-match-method |
---|
54 | sym (symbol-function sym)) |
---|
55 | ))) |
---|
56 | (find-calist-package name))) |
---|
57 | |
---|
58 | (defun make-calist-package (name &optional use) |
---|
59 | "Create a new calist-package." |
---|
60 | (let ((calist-field-match-method-obarray (make-vector 7 0))) |
---|
61 | (set-alist 'calist-package-alist name |
---|
62 | calist-field-match-method-obarray) |
---|
63 | (use-calist-package (or use 'standard)) |
---|
64 | calist-field-match-method-obarray)) |
---|
65 | |
---|
66 | (defun in-calist-package (name) |
---|
67 | "Set the current calist-package to a new or existing calist-package." |
---|
68 | (setq calist-field-match-method-obarray |
---|
69 | (or (find-calist-package name) |
---|
70 | (make-calist-package name)))) |
---|
71 | |
---|
72 | (in-calist-package 'standard) |
---|
73 | |
---|
74 | (defun calist-default-field-match-method (calist field-type field-value) |
---|
75 | (let ((s-field (assoc field-type calist))) |
---|
76 | (cond ((null s-field) |
---|
77 | (cons (cons field-type field-value) calist) |
---|
78 | ) |
---|
79 | ((eq field-value t) |
---|
80 | calist) |
---|
81 | ((equal (cdr s-field) field-value) |
---|
82 | calist)))) |
---|
83 | |
---|
84 | (define-calist-field-match-method t (function calist-default-field-match-method)) |
---|
85 | |
---|
86 | (defsubst calist-field-match-method (field-type) |
---|
87 | (symbol-function |
---|
88 | (or (intern-soft (if (symbolp field-type) |
---|
89 | (symbol-name field-type) |
---|
90 | field-type) |
---|
91 | calist-field-match-method-obarray) |
---|
92 | (intern-soft "t" calist-field-match-method-obarray)))) |
---|
93 | |
---|
94 | (defsubst calist-field-match (calist field-type field-value) |
---|
95 | (funcall (calist-field-match-method field-type) |
---|
96 | calist field-type field-value)) |
---|
97 | |
---|
98 | (defun ctree-match-calist (rule-tree alist) |
---|
99 | "Return matched condition-alist if ALIST matches RULE-TREE." |
---|
100 | (if (null rule-tree) |
---|
101 | alist |
---|
102 | (let ((type (car rule-tree)) |
---|
103 | (choices (cdr rule-tree)) |
---|
104 | default) |
---|
105 | (catch 'tag |
---|
106 | (while choices |
---|
107 | (let* ((choice (car choices)) |
---|
108 | (choice-value (car choice))) |
---|
109 | (if (eq choice-value t) |
---|
110 | (setq default choice) |
---|
111 | (let ((ret-alist (calist-field-match alist type (car choice)))) |
---|
112 | (if ret-alist |
---|
113 | (throw 'tag |
---|
114 | (if (cdr choice) |
---|
115 | (ctree-match-calist (cdr choice) ret-alist) |
---|
116 | ret-alist)) |
---|
117 | )))) |
---|
118 | (setq choices (cdr choices))) |
---|
119 | (if default |
---|
120 | (let ((ret-alist (calist-field-match alist type t))) |
---|
121 | (if ret-alist |
---|
122 | (if (cdr default) |
---|
123 | (ctree-match-calist (cdr default) ret-alist) |
---|
124 | ret-alist)))) |
---|
125 | )))) |
---|
126 | |
---|
127 | (defun ctree-match-calist-partially (rule-tree alist) |
---|
128 | "Return matched condition-alist if ALIST matches RULE-TREE." |
---|
129 | (if (null rule-tree) |
---|
130 | alist |
---|
131 | (let ((type (car rule-tree)) |
---|
132 | (choices (cdr rule-tree)) |
---|
133 | default) |
---|
134 | (catch 'tag |
---|
135 | (while choices |
---|
136 | (let* ((choice (car choices)) |
---|
137 | (choice-value (car choice))) |
---|
138 | (if (eq choice-value t) |
---|
139 | (setq default choice) |
---|
140 | (let ((ret-alist (calist-field-match alist type (car choice)))) |
---|
141 | (if ret-alist |
---|
142 | (throw 'tag |
---|
143 | (if (cdr choice) |
---|
144 | (ctree-match-calist-partially |
---|
145 | (cdr choice) ret-alist) |
---|
146 | ret-alist)) |
---|
147 | )))) |
---|
148 | (setq choices (cdr choices))) |
---|
149 | (if default |
---|
150 | (let ((ret-alist (calist-field-match alist type t))) |
---|
151 | (if ret-alist |
---|
152 | (if (cdr default) |
---|
153 | (ctree-match-calist-partially (cdr default) ret-alist) |
---|
154 | ret-alist))) |
---|
155 | (calist-field-match alist type t)) |
---|
156 | )))) |
---|
157 | |
---|
158 | (defun ctree-find-calist (rule-tree alist &optional all) |
---|
159 | "Return list of condition-alist which matches ALIST in RULE-TREE. |
---|
160 | If optional argument ALL is specified, default rules are not ignored |
---|
161 | even if other rules are matched for ALIST." |
---|
162 | (if (null rule-tree) |
---|
163 | (list alist) |
---|
164 | (let ((type (car rule-tree)) |
---|
165 | (choices (cdr rule-tree)) |
---|
166 | default dest) |
---|
167 | (while choices |
---|
168 | (let* ((choice (car choices)) |
---|
169 | (choice-value (car choice))) |
---|
170 | (if (eq choice-value t) |
---|
171 | (setq default choice) |
---|
172 | (let ((ret-alist (calist-field-match alist type (car choice)))) |
---|
173 | (if ret-alist |
---|
174 | (if (cdr choice) |
---|
175 | (let ((ret (ctree-find-calist |
---|
176 | (cdr choice) ret-alist all))) |
---|
177 | (while ret |
---|
178 | (let ((elt (car ret))) |
---|
179 | (or (member elt dest) |
---|
180 | (setq dest (cons elt dest)) |
---|
181 | )) |
---|
182 | (setq ret (cdr ret)) |
---|
183 | )) |
---|
184 | (or (member ret-alist dest) |
---|
185 | (setq dest (cons ret-alist dest))) |
---|
186 | ))))) |
---|
187 | (setq choices (cdr choices))) |
---|
188 | (or (and (not all) dest) |
---|
189 | (if default |
---|
190 | (let ((ret-alist (calist-field-match alist type t))) |
---|
191 | (if ret-alist |
---|
192 | (if (cdr default) |
---|
193 | (let ((ret (ctree-find-calist |
---|
194 | (cdr default) ret-alist all))) |
---|
195 | (while ret |
---|
196 | (let ((elt (car ret))) |
---|
197 | (or (member elt dest) |
---|
198 | (setq dest (cons elt dest)) |
---|
199 | )) |
---|
200 | (setq ret (cdr ret)) |
---|
201 | )) |
---|
202 | (or (member ret-alist dest) |
---|
203 | (setq dest (cons ret-alist dest))) |
---|
204 | )))) |
---|
205 | ) |
---|
206 | dest))) |
---|
207 | |
---|
208 | (defun calist-to-ctree (calist) |
---|
209 | "Convert condition-alist CALIST to condition-tree." |
---|
210 | (if calist |
---|
211 | (let* ((cell (car calist))) |
---|
212 | (cons (car cell) |
---|
213 | (list (cons (cdr cell) |
---|
214 | (calist-to-ctree (cdr calist)) |
---|
215 | )))))) |
---|
216 | |
---|
217 | (defun ctree-add-calist-strictly (ctree calist) |
---|
218 | "Add condition CALIST to condition-tree CTREE without default clause." |
---|
219 | (cond ((null calist) ctree) |
---|
220 | ((null ctree) |
---|
221 | (calist-to-ctree calist) |
---|
222 | ) |
---|
223 | (t |
---|
224 | (let* ((type (car ctree)) |
---|
225 | (values (cdr ctree)) |
---|
226 | (ret (assoc type calist))) |
---|
227 | (if ret |
---|
228 | (catch 'tag |
---|
229 | (while values |
---|
230 | (let ((cell (car values))) |
---|
231 | (if (equal (car cell)(cdr ret)) |
---|
232 | (throw 'tag |
---|
233 | (setcdr cell |
---|
234 | (ctree-add-calist-strictly |
---|
235 | (cdr cell) |
---|
236 | (delete ret (copy-alist calist))) |
---|
237 | )))) |
---|
238 | (setq values (cdr values))) |
---|
239 | (setcdr ctree (cons (cons (cdr ret) |
---|
240 | (calist-to-ctree |
---|
241 | (delete ret (copy-alist calist)))) |
---|
242 | (cdr ctree))) |
---|
243 | ) |
---|
244 | (catch 'tag |
---|
245 | (while values |
---|
246 | (let ((cell (car values))) |
---|
247 | (setcdr cell |
---|
248 | (ctree-add-calist-strictly (cdr cell) calist)) |
---|
249 | ) |
---|
250 | (setq values (cdr values)))) |
---|
251 | ) |
---|
252 | ctree)))) |
---|
253 | |
---|
254 | (defun ctree-add-calist-with-default (ctree calist) |
---|
255 | "Add condition CALIST to condition-tree CTREE with default clause." |
---|
256 | (cond ((null calist) ctree) |
---|
257 | ((null ctree) |
---|
258 | (let* ((cell (car calist)) |
---|
259 | (type (car cell)) |
---|
260 | (value (cdr cell))) |
---|
261 | (cons type |
---|
262 | (list (list t) |
---|
263 | (cons value (calist-to-ctree (cdr calist))))) |
---|
264 | )) |
---|
265 | (t |
---|
266 | (let* ((type (car ctree)) |
---|
267 | (values (cdr ctree)) |
---|
268 | (ret (assoc type calist))) |
---|
269 | (if ret |
---|
270 | (catch 'tag |
---|
271 | (while values |
---|
272 | (let ((cell (car values))) |
---|
273 | (if (equal (car cell)(cdr ret)) |
---|
274 | (throw 'tag |
---|
275 | (setcdr cell |
---|
276 | (ctree-add-calist-with-default |
---|
277 | (cdr cell) |
---|
278 | (delete ret (copy-alist calist))) |
---|
279 | )))) |
---|
280 | (setq values (cdr values))) |
---|
281 | (if (assq t (cdr ctree)) |
---|
282 | (setcdr ctree |
---|
283 | (cons (cons (cdr ret) |
---|
284 | (calist-to-ctree |
---|
285 | (delete ret (copy-alist calist)))) |
---|
286 | (cdr ctree))) |
---|
287 | (setcdr ctree |
---|
288 | (list* (list t) |
---|
289 | (cons (cdr ret) |
---|
290 | (calist-to-ctree |
---|
291 | (delete ret (copy-alist calist)))) |
---|
292 | (cdr ctree))) |
---|
293 | )) |
---|
294 | (catch 'tag |
---|
295 | (while values |
---|
296 | (let ((cell (car values))) |
---|
297 | (setcdr cell |
---|
298 | (ctree-add-calist-with-default (cdr cell) calist)) |
---|
299 | ) |
---|
300 | (setq values (cdr values))) |
---|
301 | (let ((cell (assq t (cdr ctree)))) |
---|
302 | (if cell |
---|
303 | (setcdr cell |
---|
304 | (ctree-add-calist-with-default (cdr cell) |
---|
305 | calist)) |
---|
306 | (let ((elt (cons t (calist-to-ctree calist)))) |
---|
307 | (or (member elt (cdr ctree)) |
---|
308 | (setcdr ctree (cons elt (cdr ctree))) |
---|
309 | )) |
---|
310 | ))) |
---|
311 | ) |
---|
312 | ctree)))) |
---|
313 | |
---|
314 | (defun ctree-set-calist-strictly (ctree-var calist) |
---|
315 | "Set condition CALIST in CTREE-VAR without default clause." |
---|
316 | (set ctree-var |
---|
317 | (ctree-add-calist-strictly (symbol-value ctree-var) calist))) |
---|
318 | |
---|
319 | (defun ctree-set-calist-with-default (ctree-var calist) |
---|
320 | "Set condition CALIST to CTREE-VAR with default clause." |
---|
321 | (set ctree-var |
---|
322 | (ctree-add-calist-with-default (symbol-value ctree-var) calist))) |
---|
323 | |
---|
324 | |
---|
325 | ;;; @ end |
---|
326 | ;;; |
---|
327 | |
---|
328 | (require 'product) |
---|
329 | (product-provide (provide 'calist) (require 'apel-ver)) |
---|
330 | |
---|
331 | ;;; calist.el ends here |
---|