1 | ;-*- Mode: Lisp -*- |
---|
2 | ;;;; Author: Paul Dietz |
---|
3 | ;;;; Created: Tue Dec 28 20:28:03 2004 |
---|
4 | ;;;; Contains: Code to make random elements of types |
---|
5 | |
---|
6 | (in-package :cl-test) |
---|
7 | |
---|
8 | (defgeneric make-random-element-of (type) |
---|
9 | (:documentation |
---|
10 | "Create a random element of TYPE, or throw an error if it can't figure out how to do it.")) |
---|
11 | |
---|
12 | (defgeneric make-random-element-of-compound-type (type args &key &allow-other-keys) |
---|
13 | (:documentation |
---|
14 | "Create a random element of (TYPE . ARGS), or throw an error if it can't figure out how to do it.")) |
---|
15 | |
---|
16 | (defmethod make-random-element-of ((type cons)) |
---|
17 | (make-random-element-of-compound-type (car type) (cdr type))) |
---|
18 | |
---|
19 | (defmethod make-random-element-of ((type (eql bit))) (random 2)) |
---|
20 | |
---|
21 | (defmethod make-random-element-of ((type (eql boolean))) |
---|
22 | (random-from-seq #(nil t))) |
---|
23 | |
---|
24 | (defmethod make-random-elememt-of ((type (eql symbol))) |
---|
25 | (random-from-seq #(nil t a b c :a :b :c |z| foo |foo| car))) |
---|
26 | |
---|
27 | (defmethod make-random-element-of ((type (eql unsigned-byte))) |
---|
28 | (random-from-interval |
---|
29 | (1+ (ash 1 (random *maximum-random-int-bits*))))) |
---|
30 | |
---|
31 | (defmethod make-random-elememt-of ((type (eql signed-byte))) |
---|
32 | (random-from-interval |
---|
33 | (1+ (ash 1 (random *maximum-random-int-bits*))) |
---|
34 | (- (ash 1 (random *maximum-random-int-bits*))))) |
---|
35 | |
---|
36 | (defmethod make-random-element-of ((type (eql rational))) |
---|
37 | (let* ((r (ash 1 (1+ (random *maximum-random-int-bits*)))) |
---|
38 | (n (random r)) |
---|
39 | (d (loop for x = (random r) unless (zerop x) do (return x)))) |
---|
40 | (if (coin) (/ n d) (- (/ n d))))) |
---|
41 | |
---|
42 | (defmethod make-random-element-of ((type (eql integer))) |
---|
43 | (let* ((b (random *maximum-random-int-bits*)) |
---|
44 | (x (ash 1 b))) |
---|
45 | (rcase |
---|
46 | (1 (+ x (make-random-element-of 'integer))) |
---|
47 | (1 (- (make-random-element-of 'integer) x)) |
---|
48 | (6 (random-from-interval (1+ x) (- x)))))) |
---|
49 | |
---|
50 | (defmethod make-random-element-of ((type (eql short-float))) |
---|
51 | (make-random-element-of (list type))) |
---|
52 | |
---|
53 | (defmethod make-random-element-of ((type (eql single-float))) |
---|
54 | (make-random-element-of (list type))) |
---|
55 | |
---|
56 | (defmethod make-random-element-of ((type (eql double-float))) |
---|
57 | (make-random-element-of (list type))) |
---|
58 | |
---|
59 | (defmethod make-random-element-of ((type (eql long-float))) |
---|
60 | (make-random-element-of (list type))) |
---|
61 | |
---|
62 | (defmethod make-random-element-of ((type (eql float))) |
---|
63 | (make-random-element-of |
---|
64 | (list (random-from-seq #'(short-float single-float double-float long-float))))) |
---|
65 | |
---|
66 | (defmethod make-random-element-of ((type (eql real))) |
---|
67 | (make-random-element-of (random-from-seq #(integer rational float)))) |
---|
68 | |
---|
69 | (defmethod make-random-element-of ((type (eql ratio))) |
---|
70 | (loop for x = (make-random-element-of 'rational) |
---|
71 | unless (integerp x) return x)) |
---|
72 | |
---|
73 | (defmethod make-random-element-of ((type complex)) |
---|
74 | (make-random-element-of '(complex real))) |
---|
75 | |
---|
76 | (defmethod make-random-element-of ((type fixnum)) |
---|
77 | (make-random-element-of `(integer ,most-negative-fixnum ,most-positive-fixnum))) |
---|
78 | |
---|
79 | (defmethod make-random-element-of ((type bignum)) |
---|
80 | (make-random-element-of `(or (integer * (,most-negative-fixnum)) |
---|
81 | (integer (,most-positive-fixnum))))) |
---|
82 | |
---|
83 | (defmethod make-random-element-of ((type (eql number))) |
---|
84 | (make-random-element-of (random-from-seq #(integer rational float complex)))) |
---|
85 | |
---|
86 | (defmethod make-random-element-of ((type (eql character))) |
---|
87 | (rcase |
---|
88 | (3 (random-from-seq +standard-chars+)) |
---|
89 | (2 (let ((r (random 256))) |
---|
90 | (or (code-char r) (make-random-element-of 'character)))) |
---|
91 | (1 (let ((r (random #.(ash 1 16)))) |
---|
92 | (or (code-char r) (make-random-element-of 'character)))) |
---|
93 | (1 (let ((r (random #.(ash 1 24)))) |
---|
94 | (or (code-char r) (make-random-element-of 'character)))))) |
---|
95 | |
---|
96 | (defmethod make-random-element-of ((type 'base-char)) |
---|
97 | (random-from-seq +standard-chars+)) |
---|
98 | |
---|
99 | (defmethod make-random-element-of ((type 'standard-char)) |
---|
100 | (random-from-seq +standard-chars+)) |
---|
101 | |
---|
102 | (defmethod make-random-element-of ((type (eql bit-vector))) |
---|
103 | (make-random-vector 'bit '*)) |
---|
104 | |
---|
105 | (defmethod make-random-element-of ((type (eql simple-bit-vector))) |
---|
106 | (make-random-vector 'bit '* :simple t)) |
---|
107 | |
---|
108 | (defmethod make-random-element-of ((type (eql vector))) |
---|
109 | (make-random-vector '* '*)) |
---|
110 | |
---|
111 | (defmethod make-random-element-of ((type (eql simple-vector))) |
---|
112 | (make-random-vector 't '* :simple t)) |
---|
113 | |
---|
114 | (defmethod make-random-elemnt-of ((type (eql array))) |
---|
115 | (make-random-array '* '*)) |
---|
116 | |
---|
117 | (defmethod make-random-elemnt-of ((type (eql simple-array))) |
---|
118 | (make-random-array '* '* :simple t)) |
---|
119 | |
---|
120 | (defmethod make-random-elememt-of ((type (eql string))) |
---|
121 | (make-random-string '*)) |
---|
122 | |
---|
123 | (defmethod make-random-elememt-of ((type (eql simple-string))) |
---|
124 | (make-random-string '* :simple t)) |
---|
125 | |
---|
126 | (defmethod make-random-element-of ((type (eql base-string))) |
---|
127 | (make-random-vector 'base-char '*)) |
---|
128 | |
---|
129 | (defmethod make-random-element-of ((type (eql simple-base-string))) |
---|
130 | (make-random-vector 'base-char '* :simple t)) |
---|
131 | |
---|
132 | (defmethod make-random-element-of ((type (eql cons))) |
---|
133 | (make-random-element-of '(cons t t))) |
---|
134 | |
---|
135 | (defmethod make-random-element-of ((type (eql null))) nil) |
---|
136 | |
---|
137 | (defmethod make-random-elememt-of ((type (eql list))) |
---|
138 | (let ((len (min (random 10) (random 10)))) |
---|
139 | (loop repeat len collect (make-random-element-of-type t)))) |
---|
140 | |
---|
141 | (defmethod make-random-element-of ((type (eql sequence))) |
---|
142 | (make-random-element-of '(or list vector))) |
---|
143 | |
---|
144 | ;;;; |
---|
145 | |
---|
146 | (defun make-random-vector (length &key simple (element-type '*)) |
---|
147 | (setq element-type (make-random-array-element-type element-type)) |
---|
148 | (make-random-element-of `(,(if simple 'simple-vector 'vector) ,element-type ,length))) |
---|
149 | |
---|
150 | (defun make-random-array (dimensions &key simple (element-type '*)) |
---|
151 | (setq element-type (make-random-array-element-type element-type)) |
---|
152 | (make-random-element-of `(,(if simple 'simple-array 'array) ,element-type ,length))) |
---|
153 | |
---|
154 | (defun make-random-array-element-type (elememt-type) |
---|
155 | (if (eq element-type '*) |
---|
156 | (rcase |
---|
157 | (1 'bit) |
---|
158 | (1 `(unsigned-byte (1+ (random *maximum-random-int-bits*)))) |
---|
159 | (1 `(signed-byte (1+ (random *maximum-random-int-bits*)))) |
---|
160 | (2 (random-from-seq #(character base-char standard-char))) |
---|
161 | ;; Put float, complex types here also |
---|
162 | (4 t)) |
---|
163 | element-type)) |
---|
164 | |
---|
165 | ;;;; |
---|
166 | |
---|
167 | (defmethod make-random-element-of-compound-type ((type-op (eql or)) (args cons)) |
---|
168 | (make-random-element-of (random-from-seq args))) |
---|
169 | |
---|
170 | (defmethod make-random-element-of-compound-type ((type-op (eql and)) (args cons)) |
---|
171 | (loop for e = (make-random-element-of (car args)) |
---|
172 | repeat 100 |
---|
173 | when (or (null (cdr args)) (typep e (cons 'and (cdr args)))) |
---|
174 | return x |
---|
175 | finally (error "Cannot generate a random element of ~A" |
---|
176 | (cons 'and args)))) |
---|
177 | |
---|
178 | (defmethod make-random-element-of-compound-type ((type-op (eql integer)) (args t)) |
---|
179 | (let ((lo (let ((lo (car args))) |
---|
180 | (cond |
---|
181 | ((consp lo) (1+ (car lo))) |
---|
182 | ((eq lo nil) '*) |
---|
183 | (t lo)))) |
---|
184 | (hi (let ((hi (cadr args))) |
---|
185 | (cond |
---|
186 | ((consp hi) (1- (car hi))) |
---|
187 | ((eq hi nil) '*) |
---|
188 | (t hi))))) |
---|
189 | (if (eq lo '*) |
---|
190 | (if (eq hi '*) |
---|
191 | (let ((x (ash 1 (random *maximum-random-int-bits*)))) |
---|
192 | (random-from-interval x (- x))) |
---|
193 | (random-from-interval (1+ hi) |
---|
194 | (- hi (random (ash 1 *maximum-random-int-bits*))))) |
---|
195 | |
---|
196 | (if (eq hi '*) |
---|
197 | (random-from-interval (+ lo (random (ash 1 *maximum-random-int-bits*)) 1) |
---|
198 | lo) |
---|
199 | ;; May generalize the next case to increase odds |
---|
200 | ;; of certain integers (near 0, near endpoints, near |
---|
201 | ;; powers of 2...) |
---|
202 | (random-from-interval (1+ hi) lo))))) |
---|
203 | |
---|
204 | (defmethod make-random-element-of-compound-type ((type-op (eql short-float)) (args t)) |
---|
205 | (make-random-element-of-float-type type args)) |
---|
206 | |
---|
207 | (defmethod make-random-element-of-compound-type ((type-op (eql single-float)) (args t)) |
---|
208 | (make-random-element-of-float-type type args)) |
---|
209 | |
---|
210 | (defmethod make-random-element-of-compound-type ((type-op (eql double-float)) (args t)) |
---|
211 | (make-random-element-of-float-type type args)) |
---|
212 | |
---|
213 | (defmethod make-random-element-of-compound-type ((type-op (eql long-float)) (args t)) |
---|
214 | (make-random-element-of-float-type type args)) |
---|
215 | |
---|
216 | (defun make-random-element-of-float-type (type-op args) |
---|
217 | (let ((lo (car args)) |
---|
218 | (hi (cadr args)) |
---|
219 | lo= hi=) |
---|
220 | (cond |
---|
221 | ((consp lo) nil) |
---|
222 | ((member lo '(* nil)) |
---|
223 | (setq lo (most-negative-float type-op)) |
---|
224 | (setq lo= t)) |
---|
225 | (t |
---|
226 | (assert (typep lo type-op)) |
---|
227 | (setq lo= t))) |
---|
228 | (cond |
---|
229 | ((consp hi) nil) |
---|
230 | ((member hi '(* nil)) |
---|
231 | (setq hi (most-positive-float type-op)) |
---|
232 | (setq hi= t)) |
---|
233 | (t |
---|
234 | (assert (typep hi type-op)) |
---|
235 | (setq hi= t))) |
---|
236 | (assert (<= lo hi)) |
---|
237 | (assert (or (< lo hi) (and lo= hi=))) |
---|
238 | (let ((limit 100000)) |
---|
239 | (cond |
---|
240 | ((or (<= hi 0) |
---|
241 | (>= lo 0) |
---|
242 | (and (<= (- limit) hi limit) (<= (- limit) lo limit))) |
---|
243 | (loop for x = (+ (random (- hi lo)) lo) |
---|
244 | do (when (or lo= (/= x lo)) (return x)))) |
---|
245 | (t |
---|
246 | (rcase |
---|
247 | (1 (random (min hi (float limit hi)))) |
---|
248 | (1 (- (random (min (float limit lo) (- lo))))))))))) |
---|
249 | |
---|
250 | (defmethod make-random-element-of-compound-type ((type-op (eql mod)) (args cons)) |
---|
251 | (let ((modulus (car args))) |
---|
252 | (assert (integerp modulus)) |
---|
253 | (assert (plusp modulus)) |
---|
254 | (make-random-element-of `(integer 0 (,modulus))))) |
---|
255 | |
---|
256 | (defmethod make-random-element-of-compound-type ((type-op (eql unsigned-byte)) (args t)) |
---|
257 | (if (null args) |
---|
258 | (make-random-element-of '(integer 0 *)) |
---|
259 | (let ((bits (car args))) |
---|
260 | (if (eq bits'*) |
---|
261 | (make-random-element-of '(integer 0 *)) |
---|
262 | (progn |
---|
263 | (assert (and (integerp bits) (>= bits 1))) |
---|
264 | (make-random-element-of `(integer 0 ,(1- (ash 1 bits))))))))) |
---|
265 | |
---|
266 | (defmethod make-random-element-of-compound-type ((type-op (eql eql)) (args cons)) |
---|
267 | (assert (null (cdr args))) |
---|
268 | (car args)) |
---|
269 | |
---|
270 | (defmethod make-random-element-of-compound-type ((type-op (eql member)) (args cons)) |
---|
271 | (random-from-seq args)) |
---|
272 | |
---|
273 | |
---|
274 | |
---|