1 | [[tags: egg]] |
---|
2 | |
---|
3 | == SRFI 27 |
---|
4 | |
---|
5 | Source of Random Bits |
---|
6 | |
---|
7 | [[toc:]] |
---|
8 | |
---|
9 | |
---|
10 | == Documentation |
---|
11 | |
---|
12 | A Chicken implementation of [[http://srfi.schemers.org/srfi-27/srfi-27.html|SRFI 27]]. |
---|
13 | |
---|
14 | === SRFI 27 |
---|
15 | |
---|
16 | Most procedures are per the SRFI 27 specification document. Only the extensions |
---|
17 | are documented here. |
---|
18 | |
---|
19 | The most obvious extensions are support for multiple random number generators |
---|
20 | and multiple entropy sources. |
---|
21 | |
---|
22 | ==== Usage |
---|
23 | |
---|
24 | <enscript language=scheme> |
---|
25 | (use srfi-27) |
---|
26 | </enscript> |
---|
27 | |
---|
28 | ==== current-random-source |
---|
29 | |
---|
30 | <procedure>(current-random-source [RANDOM-SOURCE])</procedure> |
---|
31 | |
---|
32 | Parameter for the default {{random-source}}. |
---|
33 | |
---|
34 | The variable {{default-random-source}} is the initial {{(current-random-source)}}. |
---|
35 | |
---|
36 | The initial {{random-source}} is an instance of {{'mrg32k3a}}, per SRFI 27. |
---|
37 | |
---|
38 | ==== random-integer/current |
---|
39 | |
---|
40 | <procedure>(random-integer/current) -> (procedure (integer) integer)</procedure> |
---|
41 | |
---|
42 | Returns an {{integer}} random generator from the {{(current-random-source)}}. |
---|
43 | |
---|
44 | Like {{random-integer}} but w/ {{(current-random-source)}}, & a {{procedure}}, |
---|
45 | not a {{variable}}. |
---|
46 | |
---|
47 | ==== random-real/current |
---|
48 | |
---|
49 | <procedure>(random-real/current) -> (procedure () real)</procedure> |
---|
50 | |
---|
51 | Returns a {{real}} random generator from the {{(current-random-source)}}. |
---|
52 | |
---|
53 | Like {{random-real}} but w/ {{(current-random-source)}}, & a {{procedure}}, |
---|
54 | not a {{variable}}. |
---|
55 | |
---|
56 | ==== registered-random-sources |
---|
57 | |
---|
58 | <procedure>(registered-random-sources) -> (list-of symbol)</procedure> |
---|
59 | |
---|
60 | Returns a {{list}} of the registered {{random-source}} names. |
---|
61 | |
---|
62 | ==== registered-random-source |
---|
63 | |
---|
64 | <procedure>(registered-random-source NAME) -> (disjoint #f (procedure () random-source))</procedure> |
---|
65 | |
---|
66 | Returns the {{random-source}} creator for the specified {{NAME}} or {{#f}} if |
---|
67 | not registered. |
---|
68 | |
---|
69 | ==== random-source? |
---|
70 | |
---|
71 | <procedure>(random-source? OBJ) -> boolean</procedure> |
---|
72 | |
---|
73 | {{random-source}} predicate. |
---|
74 | |
---|
75 | <procedure>(check-random-source LOC OBJ [NAM])</procedure> |
---|
76 | |
---|
77 | Raise error when {{OBJ}} not a {{random-source}}. {{NAM}} is the optional |
---|
78 | parameter name. |
---|
79 | |
---|
80 | <procedure>(error-random-source LOC OBJ [NAM])</procedure> |
---|
81 | |
---|
82 | Raise error for {{OBJ}} not a {{random-source}}. {{NAM}} is the optional |
---|
83 | parameter name. |
---|
84 | |
---|
85 | ==== make-random-source |
---|
86 | |
---|
87 | <procedure>(make-random-source [SOURCE (current-random-source)]) -> random-source</procedure> |
---|
88 | |
---|
89 | {{SOURCE}} is either a {{random-source}} or the {{symbol}} of a registered |
---|
90 | {{random-source}}, the name. |
---|
91 | |
---|
92 | ==== new-random-source |
---|
93 | |
---|
94 | <procedure>(new-random-source [RANDOM-SOURCE (current-random-source)]) -> random-source</procedure> |
---|
95 | |
---|
96 | Same as {{(make-random-source RANDOM-SOURCE)}}. |
---|
97 | |
---|
98 | ==== random-source-name |
---|
99 | |
---|
100 | <procedure>(random-source-name RANDOM-SOURCE) -> symbol</procedure> |
---|
101 | |
---|
102 | The symbolic name of the {{RANDOM-SOURCE}}. |
---|
103 | |
---|
104 | ==== random-source-documentation |
---|
105 | |
---|
106 | <procedure>(random-source-documentation RANDOM-SOURCE) -> string</procedure> |
---|
107 | |
---|
108 | Some more information for the {{RANDOM-SOURCE}}. |
---|
109 | |
---|
110 | ==== random-source-log2-period |
---|
111 | |
---|
112 | <procedure>(random-source-log2-period RANDOM-SOURCE) -> integer</procedure> |
---|
113 | |
---|
114 | The period of the {{RANDOM-SOURCE}} as a power of 2. A {{fixnum}}. |
---|
115 | |
---|
116 | ==== random-source-maximum-range |
---|
117 | |
---|
118 | <procedure>(random-source-maximum-range RANDOM-SOURCE) -> inexact-integer</procedure> |
---|
119 | |
---|
120 | The largest integer the {{RANDOM-SOURCE}} can produce without resort to a |
---|
121 | {{bignum}} representation. Currently an inexact-integer {{flonum}}, even for |
---|
122 | 64-bit CPUs. |
---|
123 | |
---|
124 | ==== random-source-entropy-source |
---|
125 | |
---|
126 | <procedure>(random-source-entropy-source RANDOM-SOURCE) -> entropy-source</procedure> |
---|
127 | |
---|
128 | The current {{entropy-source}} for the {{RANDOM-SOURCE}}. |
---|
129 | |
---|
130 | ==== random-source-entropy-source-set! |
---|
131 | |
---|
132 | <procedure>(random-source-entropy-source-set! RANDOM-SOURCE ENTROPY-SOURCE)</procedure> |
---|
133 | |
---|
134 | Changes the current {{entropy-source}} for the {{RANDOM-SOURCE}}. |
---|
135 | |
---|
136 | ==== random-source-state-ref |
---|
137 | |
---|
138 | <procedure>(random-source-state-ref RANDOM-SOURCE) -> random-state</procedure> |
---|
139 | |
---|
140 | Per the SRFI 27 specification the {{random-state}} is a valid external |
---|
141 | representation of {{RANDOM-SOURCE}} state. |
---|
142 | |
---|
143 | ==== random-source-state-set! |
---|
144 | |
---|
145 | <procedure>(random-source-state-set! RANDOM-SOURCE RANDOM-STATE)</procedure> |
---|
146 | |
---|
147 | Only a {{RANDOM-STATE}} produced by a {{random-source-state-ref}} of the same |
---|
148 | {{random-source}} is acceptable. |
---|
149 | |
---|
150 | ==== random-source-randomize! |
---|
151 | |
---|
152 | <procedure>(random-source-randomize! RANDOM-SOURCE [ENTROPY-SOURCE])</procedure> |
---|
153 | |
---|
154 | ==== random-source-pseudo-randomize! |
---|
155 | |
---|
156 | <procedure>(random-source-pseudo-randomize! RANDOM-SOURCE I J)</procedure> |
---|
157 | |
---|
158 | ==== random-source-make-integers |
---|
159 | |
---|
160 | <procedure>(random-source-make-integers RANDOM-SOURCE) -> (procedure (integer) integer)</procedure> |
---|
161 | |
---|
162 | The result is a {{procedure}}: {{(random-source-make-integers RANDOM-SOURCE)}} |
---|
163 | |
---|
164 | ==== random-source-make-reals |
---|
165 | |
---|
166 | <procedure>(random-source-make-reals RANDOM-SOURCE [PRECISION]) -> (procedure () real)</procedure> |
---|
167 | |
---|
168 | The result is a {{procedure}}: {{(random-source-make-reals RANDOM-SOURCE PRECISION)}} |
---|
169 | |
---|
170 | {{PRECISION}} maybe {{#f}}, in which case the value is {{flonum-epsilon}}. |
---|
171 | |
---|
172 | ==== random-source-make-u8vectors |
---|
173 | |
---|
174 | <procedure>(random-source-make-u8vectors RANDOM-SOURCE) -> (procedure (integer) u8vector)</procedure> |
---|
175 | |
---|
176 | Returns a {{procedure}} of one argument, the length of the generated vector, |
---|
177 | the returns a vector of random 8-bit unsigned values, a SRFI 4 {{u8vector}}. |
---|
178 | |
---|
179 | The variable {{random-u8vector}} is a {{procedure}}: |
---|
180 | {{(random-source-make-u8vectors default-random-source)}} |
---|
181 | |
---|
182 | ==== random-source-make-f64vectors |
---|
183 | |
---|
184 | <procedure>(random-source-make-f64vectors RANDOM-SOURCE [PRECISION]) -> (procedure (integer) f64vector)</procedure> |
---|
185 | |
---|
186 | Returns a {{procedure}} of one argument, the length of the generated vector, |
---|
187 | the returns a vector of random 64-bit floating-point values, a SRFI 4 {{f64vector}}. |
---|
188 | |
---|
189 | The variable {{random-f64vector}} is a {{procedure}}: |
---|
190 | {{(random-source-make-f64vectors default-random-source)}} |
---|
191 | |
---|
192 | ==== current-entropy-source |
---|
193 | |
---|
194 | <procedure>(current-entropy-source [ENTROPY-SOURCE])</procedure> |
---|
195 | |
---|
196 | Parameter for the default {{entropy-source}}. |
---|
197 | |
---|
198 | {{default-entropy-source}} is the initial {{(current-entropy-source)}}. |
---|
199 | |
---|
200 | The initial {{entropy-source}} is an instance of {{'system-clock}}. |
---|
201 | |
---|
202 | ==== registered-entropy-sources |
---|
203 | |
---|
204 | <procedure>(registered-entropy-sources) -> (list-of symbol)</procedure> |
---|
205 | |
---|
206 | Returns a {{list}} of the registered {{entropy-source}} names. |
---|
207 | |
---|
208 | ==== registered-entropy-source |
---|
209 | |
---|
210 | <procedure>(registered-entropy-source NAME) -> (or boolean procedure)</procedure> |
---|
211 | |
---|
212 | Returns the {{entropy-source}} creator for the specified {{NAME}} or {{#f}} if not |
---|
213 | registered. |
---|
214 | |
---|
215 | ==== entropy-source? |
---|
216 | |
---|
217 | <procedure>(entropy-source? OBJ) -> boolean</procedure> |
---|
218 | |
---|
219 | {{entropy-source}} predicate. |
---|
220 | |
---|
221 | <procedure>(check-entropy-source LOC OBJ [NAM])</procedure> |
---|
222 | |
---|
223 | Raise error when {{OBJ}} not an {{entropy-source}}. {{NAM}} is the optional |
---|
224 | parameter name. |
---|
225 | |
---|
226 | <procedure>(error-entropy-source LOC OBJ [NAM])</procedure> |
---|
227 | |
---|
228 | Raise error for {{OBJ}} not an {{entropy-source}}. {{NAM}} is the optional |
---|
229 | parameter name. |
---|
230 | |
---|
231 | ==== make-entropy-source |
---|
232 | |
---|
233 | <procedure>(make-entropy-source [SOURCE (current-entropy-source)]) -> entropy-source</procedure> |
---|
234 | |
---|
235 | {{SOURCE}} is either a {{entropy-source}} or the {{symbol}} of a registered |
---|
236 | {{entropy-source}}, the name. |
---|
237 | |
---|
238 | ==== new-entropy-source |
---|
239 | |
---|
240 | <procedure>(new-entropy-source ENTROPY-SOURCE) -> entropy-source</procedure> |
---|
241 | |
---|
242 | Same as {{(make-random-entropy ENTROPY-SOURCE)}}. |
---|
243 | |
---|
244 | ==== entropy-source-name |
---|
245 | |
---|
246 | <procedure>(entropy-source-name ENTROPY-SOURCE) -> symbol</procedure> |
---|
247 | |
---|
248 | The symbolic name of the {{ENTROPY-SOURCE}}. |
---|
249 | |
---|
250 | ==== entropy-source-documentation |
---|
251 | |
---|
252 | <procedure>(entropy-source-documentation ENTROPY-SOURCE) -> string</procedure> |
---|
253 | |
---|
254 | Some more information for the {{ENTROPY-SOURCE}}. |
---|
255 | |
---|
256 | ==== entropy-source-u8 |
---|
257 | |
---|
258 | <procedure>(entropy-source-u8 ENTROPY-SOURCE) -> fixnum</procedure> |
---|
259 | |
---|
260 | Returns a non-negative {{fixnum}} from the {{ENTROPY-SOURCE}}. |
---|
261 | |
---|
262 | ==== entropy-source-f64 |
---|
263 | |
---|
264 | <procedure>(entropy-source-f64 ENTROPY-SOURCE) -> flonum</procedure> |
---|
265 | |
---|
266 | Returns a {{flonum}} from the {{ENTROPY-SOURCE}}. |
---|
267 | |
---|
268 | ==== entropy-source-u8vector |
---|
269 | |
---|
270 | <procedure>(entropy-source-u8vector ENTROPY-SOURCE LENGTH [U8VECTOR]) -> u8vector</procedure> |
---|
271 | |
---|
272 | Returns a {{u8vector}} with the 0 thru {{LENGTH-1}} elements filled with non-negative |
---|
273 | {{fixnum}}s from the {{ENTROPY-SOURCE}}. If {{U8VECTOR}} is supplied then this |
---|
274 | is used otherwise a new vector is returned. |
---|
275 | |
---|
276 | ==== entropy-source-f64vector |
---|
277 | |
---|
278 | <procedure>(entropy-source-f64vector ENTROPY-SOURCE LENGTH [F64VECTOR]) -> f64vector</procedure> |
---|
279 | |
---|
280 | Returns a {{f64vector}} with the 0 thru {{LENGTH-1}} elements filled with |
---|
281 | {{flonum}}s from the {{ENTROPY-SOURCE}}. If {{F64VECTOR}} is supplied then this |
---|
282 | is used otherwise a new vector is returned. |
---|
283 | |
---|
284 | ==== entropy-source-integer |
---|
285 | |
---|
286 | <procedure>(entropy-source-integer ENTROPY-SOURCE) -> integer</procedure> |
---|
287 | |
---|
288 | Returns an {{integer}} from the {{ENTROPY-SOURCE}}. |
---|
289 | |
---|
290 | |
---|
291 | === Random Sources |
---|
292 | |
---|
293 | A random source module must be loaded before it can be used. This maybe obvious |
---|
294 | but a call of {{(make-random-source 'moa)}} will fail unless the extension |
---|
295 | "moa" is loaded. |
---|
296 | |
---|
297 | See {{make-random-source}} for use of the {{NAME}}. |
---|
298 | |
---|
299 | ==== Pierre L'Ecuyer's Multiple Recursive Generator 32k3a random number generator |
---|
300 | |
---|
301 | ===== Usage |
---|
302 | |
---|
303 | <enscript language=scheme> |
---|
304 | (use mrg32k3a) |
---|
305 | </enscript> |
---|
306 | |
---|
307 | ===== make-random-source-mrg32k3a |
---|
308 | |
---|
309 | <procedure>(make-random-source-mrg32k3a) -> random-source</procedure> |
---|
310 | |
---|
311 | Registered {{NAME}} is {{'mrg32k3a}} |
---|
312 | |
---|
313 | ==== George Marsaglia's Multiply With Carry random number generator |
---|
314 | |
---|
315 | ===== Usage |
---|
316 | |
---|
317 | <enscript language=scheme> |
---|
318 | (use mwc) |
---|
319 | </enscript> |
---|
320 | |
---|
321 | ===== make-random-source-mwc |
---|
322 | |
---|
323 | <procedure>(make-random-source-mwc) -> random-source</procedure> |
---|
324 | |
---|
325 | Registered {{NAME}} is {{'mwc}} |
---|
326 | |
---|
327 | ==== George Marsaglia's Mother Of All random number generator |
---|
328 | |
---|
329 | ===== Usage |
---|
330 | |
---|
331 | <enscript language=scheme> |
---|
332 | (use moa) |
---|
333 | </enscript> |
---|
334 | |
---|
335 | ===== make-random-source-moa |
---|
336 | |
---|
337 | <procedure>(make-random-source-moa) -> random-source</procedure> |
---|
338 | |
---|
339 | Registered {{NAME}} is {{'moa}} |
---|
340 | |
---|
341 | |
---|
342 | === Entropy Sources |
---|
343 | |
---|
344 | An entropy source module must be loaded before it can be used. |
---|
345 | |
---|
346 | ==== System Clock |
---|
347 | |
---|
348 | ===== Usage |
---|
349 | |
---|
350 | <enscript language=scheme> |
---|
351 | (use entropy-clock) |
---|
352 | </enscript> |
---|
353 | |
---|
354 | ===== make-entropy-source-system-clock |
---|
355 | |
---|
356 | <procedure>(make-entropy-source-system-clock) -> entropy-source</procedure> |
---|
357 | |
---|
358 | Registered {{NAME}} is {{'system-clock}} |
---|
359 | |
---|
360 | ==== Windows Crypt Device |
---|
361 | |
---|
362 | ===== Usage |
---|
363 | |
---|
364 | <enscript language=scheme> |
---|
365 | (use entropy-windows) |
---|
366 | </enscript> |
---|
367 | |
---|
368 | ===== make-entropy-source-crypt |
---|
369 | |
---|
370 | <procedure>(make-entropy-source-crypt [BUFFER-LENGTH]) -> entropy-source</procedure> |
---|
371 | |
---|
372 | Registered {{NAME}} is {{'crypt}} |
---|
373 | |
---|
374 | ==== Unix Random Device |
---|
375 | |
---|
376 | ===== Usage |
---|
377 | |
---|
378 | <enscript language=scheme> |
---|
379 | (use entropy-unix) |
---|
380 | </enscript> |
---|
381 | |
---|
382 | ===== make-entropy-source-urandom-device |
---|
383 | |
---|
384 | <procedure>(make-entropy-source-urandom-device) -> entropy-source</procedure> |
---|
385 | |
---|
386 | Registered {{NAME}} is {{'random-device}} |
---|
387 | |
---|
388 | ===== make-entropy-source-random-device |
---|
389 | |
---|
390 | <procedure>(make-entropy-source-random-device) -> entropy-source</procedure> |
---|
391 | |
---|
392 | Registered {{NAME}} is {{'urandom-device}} |
---|
393 | |
---|
394 | |
---|
395 | === Procedure Entropy Source |
---|
396 | |
---|
397 | {{U8PROC}} is a procedure of no arguments returning a {{fixnum}} in the range |
---|
398 | {{0 .. 255}}. |
---|
399 | |
---|
400 | {{F64PROC}} is a procedure of no arguments returning a finite {{flonum}}. |
---|
401 | |
---|
402 | ==== Usage |
---|
403 | |
---|
404 | <enscript language=scheme> |
---|
405 | (use entropy-procedure) |
---|
406 | </enscript> |
---|
407 | |
---|
408 | ==== make-entropy-source/procedures |
---|
409 | |
---|
410 | <procedure>(make-entropy-source/procedures U8PROC F64PROC [name: (NAME (gensym 'procedures-))] [docu: (DOCU "Entropy from procedures")]) -> entropy-source</procedure> |
---|
411 | |
---|
412 | Returns an unregistered {{entropy-source}} built from the supplied {{U8PROC}} |
---|
413 | and {{F64PROC}} procedures. |
---|
414 | |
---|
415 | ==== make-entropy-source/f64procedure |
---|
416 | |
---|
417 | <procedure>(make-entropy-source/f64procedure F64PROC [name: (NAME (gensym 'procedures-))] [docu: (DOCU "Entropy from procedures")]) -> entropy-source</procedure> |
---|
418 | |
---|
419 | Returns an unregistered {{entropy-source}} built from the supplied {{F64PROC}} |
---|
420 | procedure. |
---|
421 | |
---|
422 | |
---|
423 | === Port Entropy Source |
---|
424 | |
---|
425 | ==== Usage |
---|
426 | |
---|
427 | <enscript language=scheme> |
---|
428 | (use entropy-port) |
---|
429 | </enscript> |
---|
430 | |
---|
431 | ==== entropy-port-lifetime |
---|
432 | |
---|
433 | <parameter>(entropy-port-lifetime [SECONDS])</parameter> |
---|
434 | |
---|
435 | The number of {{SECONDS}} an entropy port is kept open without any activity. |
---|
436 | |
---|
437 | {{SECONDS}} is a {{positive real}} or a {{boolean}}: {{#t}}, to reset the default |
---|
438 | seconds, or {{#f}}, to determine the lifetime by GC finalization. |
---|
439 | |
---|
440 | ==== make-entropy-source/port |
---|
441 | |
---|
442 | <procedure>(make-entropy-source/port PORT [name: (NAME (gensym 'port-))] [docu: (DOCU "Entropy from an open port")]) -> entropy-source</procedure> |
---|
443 | |
---|
444 | Returns an unregistered {{entropy-source}} built from the supplied {{PORT}}, |
---|
445 | which is treated as a binary stream. |
---|
446 | |
---|
447 | The {{PORT}} is kept open and must be closed by the caller, if at all. |
---|
448 | |
---|
449 | ==== make-entropy-source/port-open |
---|
450 | |
---|
451 | <procedure>(make-entropy-source/port-open OPENER [name: (NAME (gensym 'port-))] [docu: (DOCU "Entropy from port")]) -> entropy-source</procedure> |
---|
452 | |
---|
453 | Returns an unregistered {{entropy-source}} built from the supplied {{OPENER}}. |
---|
454 | |
---|
455 | {{OPENER}} is a {{(procedure () port)}}, returning an opened {{port}}. |
---|
456 | |
---|
457 | The returned {{port}} has an {{(entropy-port-lifetime)}} so the {{port}} may be |
---|
458 | closed and {{OPENER}} called more than once. |
---|
459 | |
---|
460 | ==== make-entropy-source/port-open-timed |
---|
461 | |
---|
462 | <procedure>(make-entropy-source/port-open-timed OPENER SECONDS [name: (NAME (gensym 'timed-port-))] [docu: (DOCU "Entropy from timed open port")]) -> entropy-source</procedure> |
---|
463 | |
---|
464 | Returns an unregistered {{entropy-source}} built from the supplied {{OPENER}} & |
---|
465 | {{SECONDS}}. |
---|
466 | |
---|
467 | {{SECONDS}} is interpreted as with {{entropy-port-lifetime}}. |
---|
468 | |
---|
469 | {{OPENER}} is interpreted as with {{make-entropy-source/port-open}}. |
---|
470 | |
---|
471 | ==== make-entropy-source/file |
---|
472 | |
---|
473 | <procedure>(make-entropy-source/file NAMSTR [name: (NAME (gensym 'file-))] [docu: (DOCU (string-append "Entropy from file \"" namstr "\""))]) -> entropy-source</procedure> |
---|
474 | |
---|
475 | Returns an unregistered {{entropy-source}} using the file named by the pathname |
---|
476 | {{NAMSTR}}. |
---|
477 | |
---|
478 | The opened {{port}} for the file {{NAMSTR}} is interpreted as with |
---|
479 | {{make-entropy-source/port-open}}. |
---|
480 | |
---|
481 | |
---|
482 | === Simple Distributions |
---|
483 | |
---|
484 | Provides exact and inexact generators. All return 2 values: the generator |
---|
485 | itself and a procedure returning the argument values used to parameterize the |
---|
486 | generator. The second return value can be ignored. |
---|
487 | |
---|
488 | ==== Usage |
---|
489 | |
---|
490 | <enscript language=scheme> |
---|
491 | (use srfi-27-uniform-random) |
---|
492 | </enscript> |
---|
493 | |
---|
494 | ==== make-uniform-random-integers |
---|
495 | |
---|
496 | <procedure>(make-uniform-random-integers [high: (HIGH #f)] [low: (LOW 0)] [precision: (PRECISION 1)] [source: (SOURCE (current-random-source))]) -> (procedure () integer)</procedure> |
---|
497 | |
---|
498 | {{LOW}}, {{HIGH}} and {{PRECISION}} are {{integer}}s. |
---|
499 | |
---|
500 | {{SOURCE}} is a {{random-source}}. |
---|
501 | |
---|
502 | {{HIGH}}, if not supplied, is the {{(- (random-source-maximum-range source) 1)}}. |
---|
503 | |
---|
504 | The generator returns integers in the range {{LOW .. HIGH}} with an index of |
---|
505 | {{PRECISION}}. Unlike a {{(random-integer)}} result negative integers are |
---|
506 | possible. |
---|
507 | |
---|
508 | {{(random-integer/current)}} <> {{(make-uniform-random-integers)}}. |
---|
509 | {{(random-integer/current)}} returns {{((integer) -> integer)}}. |
---|
510 | {{(make-uniform-random-integers)}} returns {{(() -> integer)}}. |
---|
511 | |
---|
512 | ==== make-uniform-random-reals |
---|
513 | |
---|
514 | <procedure>(make-uniform-random-reals [precision: PRECISION] [source: (SOURCE (current-random-source))]) -> (procedure () real)</procedure> |
---|
515 | |
---|
516 | The generator is as {{(random-source-make-reals SOURCE PRECISION)}}. |
---|
517 | |
---|
518 | {{PRECISION}} maybe {{#f}}, in which case the value is {{flonum-epsilon}}. |
---|
519 | |
---|
520 | {{SOURCE}} is a {{random-source}}. |
---|
521 | |
---|
522 | {{(random-real/current)}} = {{(make-uniform-random-reals)}}. Both return |
---|
523 | procedures of {{(() -> real)}}. |
---|
524 | |
---|
525 | === Vector Distributions |
---|
526 | |
---|
527 | The procedures named as per {{make-random-...}} return a {{procedure}} of one |
---|
528 | argument {{N}}, the length of the vector to be created. |
---|
529 | |
---|
530 | The nomenclature {{vector%}} is used to indicate a disjoint type union of |
---|
531 | {{vector, f32vector, f64vector}}. If the user is really keen to access the API |
---|
532 | for this type it is available in the, undocumented, "srfi-27-vector-support" |
---|
533 | module. |
---|
534 | |
---|
535 | ==== Usage |
---|
536 | |
---|
537 | <enscript language=scheme> |
---|
538 | (use srfi-27-vector) |
---|
539 | </enscript> |
---|
540 | |
---|
541 | ==== make-random-permutations |
---|
542 | ==== random-permutation! |
---|
543 | |
---|
544 | <procedure>(make-random-permutations [randoms: (RANDOMS random-integer/current)]) -> (procedure (integer) vector)</procedure> |
---|
545 | <procedure>(random-permutation! VECTOR [randoms: (RANDOMS random-integer/current)]) -> vector</procedure> |
---|
546 | |
---|
547 | Performs the "Knuth shuffle" (or "Fisher-Yates shuffle"). |
---|
548 | |
---|
549 | Fills {{VECTOR}} with a random permutation of the finite set {0 ... {{N}}-1}, where |
---|
550 | {{N}} = {{(vector-length VECTOR)}}. |
---|
551 | |
---|
552 | {{RANDOMS}} is a {{procedure}}: {{(exact-real) -> exact-real}} |
---|
553 | |
---|
554 | (From Gambit) |
---|
555 | |
---|
556 | ==== make-random-vector |
---|
557 | ==== random-vector! |
---|
558 | |
---|
559 | <procedure>(make-random-vector [randoms: (RANDOMS random-real/current)]) -> (procedure (integer) vector)</procedure> |
---|
560 | <procedure>(random-vector! VECTOR% [randoms: (RANDOMS random-real/current)]) -> vector%</procedure> |
---|
561 | |
---|
562 | Fills {{VECTOR}} with inexact real random numbers from the random distribution |
---|
563 | generator {{randoms}}. |
---|
564 | |
---|
565 | {{RANDOMS}} is a {{procedure}}: {{() -> inexact-real}} |
---|
566 | |
---|
567 | ==== make-random-hollow-sphere |
---|
568 | ==== random-hollow-sphere! |
---|
569 | |
---|
570 | <procedure>(make-random-hollow-sphere [mu: (MU 0.0)] [sigma: (SIGMA 1.0)] [randoms: (RANDOMS (random-real/current))]) -> (procedure (integer) vector)</procedure> |
---|
571 | <procedure>(random-hollow-sphere! VECTOR% [mu: (MU 0.0)] [sigma: (SIGMA 1.0)] [randoms: (RANDOMS (random-real/current))]) -> vector%</procedure> |
---|
572 | |
---|
573 | Fills {{VECTOR%}} with inexact real random numbers the sum of whose squares |
---|
574 | are equal to {{1.0}}. |
---|
575 | |
---|
576 | Thinking of {{VECTOR%}} as coordinates in space of dimension {{N}} = |
---|
577 | {{(vector%-length VECTOR%)}}, the coordinates are uniformly distributed over |
---|
578 | the surface of the unit n-sphere. |
---|
579 | |
---|
580 | (From Gambit) |
---|
581 | |
---|
582 | ==== make-random-solid-sphere |
---|
583 | ==== random-solid-sphere! |
---|
584 | |
---|
585 | <procedure>(make-random-solid-sphere [mu: (MU 0.0)] [sigma: (SIGMA 1.0)] [randoms: (RANDOMS (random-real/current))]) -> (procedure (integer) vector)</procedure> |
---|
586 | <procedure>(random-solid-sphere! VECTOR% [mu: (MU 0.0)] [sigma: (SIGMA 1.0)] [randoms: (RANDOMS (random-real/current))]) -> vector%</procedure> |
---|
587 | |
---|
588 | Fills {{VECTOR%}} with inexact real random numbers the sum of whose squares |
---|
589 | are less than {{1.0}}. |
---|
590 | |
---|
591 | Thinking of {{VECTOR%}} as coordinates in space of dimension {{N}} = |
---|
592 | {{(vector%-length VECTOR%)}}, the coordinates are uniformly distributed within |
---|
593 | the unit n-sphere. |
---|
594 | |
---|
595 | (From Gambit) |
---|
596 | |
---|
597 | |
---|
598 | === Other Distributions |
---|
599 | |
---|
600 | Provides generators for some common distributions ranging over some subset of |
---|
601 | the inexact-reals. The domain of the generators depends, of course, on the |
---|
602 | specific distribution. |
---|
603 | |
---|
604 | All return 2 values: the generator itself and a procedure returning the |
---|
605 | argument values used to parameterize the generator. The second return value can |
---|
606 | be ignored. |
---|
607 | |
---|
608 | The identifiers matching {{*make-random-<distribution>}} are reserved. |
---|
609 | |
---|
610 | ==== Usage |
---|
611 | |
---|
612 | <enscript language=scheme> |
---|
613 | (use srfi-27-distributions) |
---|
614 | </enscript> |
---|
615 | |
---|
616 | All distributions are available from the omnibus module |
---|
617 | {{srfi-27-distributions}}, and individually as the {{srfi-27-<distribution>}} |
---|
618 | module. |
---|
619 | |
---|
620 | ==== make-random-normals |
---|
621 | |
---|
622 | <procedure>(make-random-normals [mu: (MU 0.0)] [sigma: (SIGMA 1.0)] [randoms: (RANDOMS (random-real/current))]) -> (procedure () real)</procedure> |
---|
623 | |
---|
624 | {{MU}} is {{real}}. |
---|
625 | |
---|
626 | {{SIGMA}} is {{nonzero-real}}. |
---|
627 | |
---|
628 | {{RANDOMS}} is a {{(procedure () real)}} |
---|
629 | |
---|
630 | <enscript language=scheme> |
---|
631 | (use srfi-27-normals) |
---|
632 | </enscript> |
---|
633 | |
---|
634 | ==== make-random-exponentials |
---|
635 | |
---|
636 | <procedure>(make-random-exponentials [mu: (MU 1.0)] [randoms: (RANDOMS (random-real/current))]) -> (procedure () real)</procedure> |
---|
637 | |
---|
638 | {{MU}} is {{real}} in [{{0}} {{1}}]. |
---|
639 | |
---|
640 | {{RANDOMS}} is a {{(procedure () real)}} |
---|
641 | |
---|
642 | <enscript language=scheme> |
---|
643 | (use srfi-27-exponentials) |
---|
644 | </enscript> |
---|
645 | |
---|
646 | ==== make-random-triangles |
---|
647 | |
---|
648 | <procedure>(make-random-triangles [s: (S 0.0)] [m: (M 0.5)] [l: (L 1.0)] [randoms: (RANDOMS (random-real/current))]) -> (procedure () real)</procedure> |
---|
649 | |
---|
650 | {{S}} is {{real}}. |
---|
651 | |
---|
652 | {{M}} is {{real}} in [{{S}} {{L}}]. |
---|
653 | |
---|
654 | {{L}} is {{real}} in ]{{S}} {{+inf.0}}[. |
---|
655 | |
---|
656 | {{RANDOMS}} is a {{(procedure () real)}} |
---|
657 | |
---|
658 | <enscript language=scheme> |
---|
659 | (use srfi-27-triangles) |
---|
660 | </enscript> |
---|
661 | |
---|
662 | ==== make-random-poissons |
---|
663 | |
---|
664 | <procedure>(make-random-poissons [mu: (MU 1.0)] [randoms: (RANDOMS (random-real/current))]) -> (procedure () integer)</procedure> |
---|
665 | |
---|
666 | {{MU}} is {{nonnegative-real}}. |
---|
667 | |
---|
668 | {{RANDOMS}} is a {{(procedure () real)}} |
---|
669 | |
---|
670 | <enscript language=scheme> |
---|
671 | (use srfi-27-poissons) |
---|
672 | </enscript> |
---|
673 | |
---|
674 | ==== make-random-bernoullis |
---|
675 | |
---|
676 | <procedure>(make-random-bernoullis [p: (P 0.5)] [randoms: (RANDOMS (random-real/current))]) -> (procedure () boolean)</procedure> |
---|
677 | |
---|
678 | {{P}} is {{real}} in [{{0}} {{1}}]. |
---|
679 | |
---|
680 | {{RANDOMS}} is a {{(procedure () real)}} |
---|
681 | |
---|
682 | <enscript language=scheme> |
---|
683 | (use srfi-27-bernoullis) |
---|
684 | </enscript> |
---|
685 | |
---|
686 | ==== make-random-binomials |
---|
687 | |
---|
688 | <procedure>(make-random-binomials [t: (T 1)] [p: (P 0.5)] [randoms: (RANDOMS (random-real/current))]) -> (procedure () integer)</procedure> |
---|
689 | |
---|
690 | {{T}} is {{cardinal-integer}}. |
---|
691 | |
---|
692 | {{P}} is {{real}} in [{{0}} {{1}}]. |
---|
693 | |
---|
694 | {{RANDOMS}} is a {{(procedure () real)}} |
---|
695 | |
---|
696 | <enscript language=scheme> |
---|
697 | (use srfi-27-binomials) |
---|
698 | </enscript> |
---|
699 | |
---|
700 | ==== make-random-geometrics |
---|
701 | |
---|
702 | <procedure>(make-random-geometrics [p: (P 0.5)] [randoms: (RANDOMS (random-real/current))])) -> (procedure () integer)</procedure> |
---|
703 | |
---|
704 | {{P}} is {{real}} in [{{0}} {{1}}]. |
---|
705 | |
---|
706 | {{RANDOMS}} is a {{(procedure () real)}} |
---|
707 | |
---|
708 | <enscript language=scheme> |
---|
709 | (use srfi-27-geometrics) |
---|
710 | </enscript> |
---|
711 | |
---|
712 | ==== make-random-lognormals |
---|
713 | |
---|
714 | <procedure>(make-random-lognormals [mu: (MU 1.0)] [sigma: (SIGMA 1.0)] [randoms: (RANDOMS (random-real/current))]) -> (procedure () real)</procedure> |
---|
715 | |
---|
716 | {{MU}} is {{nonzero-real}}. |
---|
717 | |
---|
718 | {{SIGMA}} is {{nonnegative-real}}. |
---|
719 | |
---|
720 | {{RANDOMS}} is a {{(procedure () real)}} |
---|
721 | |
---|
722 | <enscript language=scheme> |
---|
723 | (use srfi-27-lognormals) |
---|
724 | </enscript> |
---|
725 | |
---|
726 | ==== make-random-cauchys |
---|
727 | |
---|
728 | <procedure>(make-random-cauchys [median: (MEDIAN 0.0)] [sigma: (SIGMA 1.0)] [randoms: (RANDOMS (random-real/current))]) -> (procedure () real)</procedure> |
---|
729 | |
---|
730 | {{MEDIAN}} is {{real}}. |
---|
731 | |
---|
732 | {{SIGMA}} is {{positive-real}}. |
---|
733 | |
---|
734 | {{RANDOMS}} is a {{(procedure () real)}} |
---|
735 | |
---|
736 | <enscript language=scheme> |
---|
737 | (use srfi-27-cauchys) |
---|
738 | </enscript> |
---|
739 | |
---|
740 | ==== make-random-gammas |
---|
741 | |
---|
742 | <procedure>(make-random-gammas [alpha: (ALPHA 1.0)] [theta: (THETA 1.0)] [randoms: (RANDOMS (random-real/current))]) -> (procedure () real)</procedure> |
---|
743 | |
---|
744 | {{ALPHA}} is {{positive-real}}. |
---|
745 | |
---|
746 | {{THETA}} is {{positive-real}}. |
---|
747 | |
---|
748 | {{RANDOMS}} is a {{(procedure () real)}} |
---|
749 | |
---|
750 | <enscript language=scheme> |
---|
751 | (use srfi-27-gammas) |
---|
752 | </enscript> |
---|
753 | |
---|
754 | ==== make-random-erlangs |
---|
755 | |
---|
756 | <procedure>(make-random-erlangs [alpha: (ALPHA 1)] [theta: (THETA 1.0)] [randoms: (RANDOMS (random-real/current))]) -> (procedure () real)</procedure> |
---|
757 | |
---|
758 | {{ALPHA}} is {{positive-real}}. |
---|
759 | |
---|
760 | {{THETA}} is {{positive-real}}. |
---|
761 | |
---|
762 | {{RANDOMS}} is a {{(procedure () real)}} |
---|
763 | |
---|
764 | <enscript language=scheme> |
---|
765 | (use srfi-27-erlangs) |
---|
766 | </enscript> |
---|
767 | |
---|
768 | ==== make-random-paretos |
---|
769 | |
---|
770 | <procedure>(make-random-paretos [alpha: (ALPHA 1.0)] [xmin: (XMIN 1.0)] [randoms: (RANDOMS (random-real/current))]) -> (procedure () real)</procedure> |
---|
771 | |
---|
772 | {{ALPHA}} is {{positive-real}}. |
---|
773 | |
---|
774 | {{XMIN}} is {{positive-real}}. |
---|
775 | |
---|
776 | {{RANDOMS}} is a {{(procedure () real)}} |
---|
777 | |
---|
778 | <enscript language=scheme> |
---|
779 | (use srfi-27-paretos) |
---|
780 | </enscript> |
---|
781 | |
---|
782 | ==== make-random-levys |
---|
783 | |
---|
784 | <procedure>(make-random-levys [gamma: (GAMMA 1.0)] [delta: (DELTA 0.0)] [randoms: (RANDOMS (random-real/current))]) -> (procedure () real)</procedure> |
---|
785 | |
---|
786 | {{GAMMA}} is {{nonnegative-real}}. |
---|
787 | |
---|
788 | {{DELTA}} is {{positive-real}}. |
---|
789 | |
---|
790 | {{RANDOMS}} is a {{(procedure () real)}} |
---|
791 | |
---|
792 | <enscript language=scheme> |
---|
793 | (use srfi-27-levys) |
---|
794 | </enscript> |
---|
795 | |
---|
796 | ==== make-random-weibulls |
---|
797 | |
---|
798 | <procedure>(make-random-weibulls [shape: (SHAPE 1.0)] [scale: (SCALE 1.0)] [randoms: (RANDOMS (random-real/current))]) -> (procedure () real)</procedure> |
---|
799 | |
---|
800 | {{SHAPE}} is {{positive-real}}. |
---|
801 | |
---|
802 | {{SCALE}} is {{positive-real}}. |
---|
803 | |
---|
804 | {{RANDOMS}} is a {{(procedure () real)}} |
---|
805 | |
---|
806 | <enscript language=scheme> |
---|
807 | (use srfi-27-weibulls) |
---|
808 | </enscript> |
---|
809 | |
---|
810 | |
---|
811 | == Examples |
---|
812 | |
---|
813 | * A procedure for creating K-vector (whatever that is) generators. The use of |
---|
814 | George Marsaglia's Multiply With Carry {{random-source}} and the "/dev/random" |
---|
815 | {{entropy-source}} are for exposition only. |
---|
816 | |
---|
817 | <enscript language=scheme> |
---|
818 | (use srfi-27 srfi-27-uniform-random srfi-27-vector mwc entropy-unix entropy-port) |
---|
819 | |
---|
820 | (define (make-random-k-vector #!optional (k 1024) (rs (make-random-source 'mwc)) es) |
---|
821 | (let ( |
---|
822 | (new-es |
---|
823 | (or |
---|
824 | es |
---|
825 | ;don't keep open port around too much |
---|
826 | (parameterize ((entropy-port-lifetime 30)) |
---|
827 | (make-entropy-source-random-device)))) |
---|
828 | (old-es |
---|
829 | (random-source-entropy-source rs)) ) |
---|
830 | (dynamic-wind |
---|
831 | (lambda () |
---|
832 | (random-source-entropy-source-set! rs new-es) ) |
---|
833 | (lambda () |
---|
834 | (let* ( |
---|
835 | (rnd (make-uniform-random-integers low: (- k) high: (+ k) precision: 2 source: rs)) |
---|
836 | (vecgen (make-random-vector randoms: rnd)) ) |
---|
837 | (lambda (#!optional (k k)) (vecgen k)) ) ) |
---|
838 | (lambda () |
---|
839 | (random-source-entropy-source-set! rs old-es) ) ) ) ) |
---|
840 | </enscript> |
---|
841 | |
---|
842 | * Providing a fixed entropy-source, a constant seed. |
---|
843 | |
---|
844 | <enscript language=scheme> |
---|
845 | (use data-structures entropy-procedure) |
---|
846 | |
---|
847 | (define (make-entropy-constant n) |
---|
848 | (make-entropy-source/f64procedure |
---|
849 | (constantly (exact->inexact n)) |
---|
850 | name: (string->uninterned-symbol (conc "entropy-constant-" n)) |
---|
851 | docu: (conc "Entropy constant " n)) ) |
---|
852 | </enscript> |
---|
853 | |
---|
854 | * A silly OO version of a random distribution generator |
---|
855 | |
---|
856 | <enscript language=scheme> |
---|
857 | (use srfi-1 srfi-13) |
---|
858 | (use coops) |
---|
859 | (use srfi-27-normals srfi-27-exponentials) |
---|
860 | |
---|
861 | ;; Named (has a name) "concept" |
---|
862 | (define-generic (name obj)) |
---|
863 | (define-class <named> () ( |
---|
864 | (namsym reader: name) ) ) |
---|
865 | |
---|
866 | ;; Parameterized extension "concept" |
---|
867 | (define-class <parameterized> () (ctor params src)) |
---|
868 | |
---|
869 | ;; Moves forward thru a set of values "concept" |
---|
870 | (define-generic (next-value obj)) |
---|
871 | (define-class <stepper> () (nxtval)) |
---|
872 | (define-method (next-value (obj <stepper>)) |
---|
873 | ((slot-value obj 'nxtval))) |
---|
874 | (define-generic (reset obj)) |
---|
875 | (define-method (reset (obj <stepper>)) |
---|
876 | (let-values ( |
---|
877 | ((gen _) |
---|
878 | (apply |
---|
879 | (slot-value obj 'ctor) |
---|
880 | `(,@(slot-value obj 'params) ,(slot-value obj 'src)))) ) |
---|
881 | (set! (slot-value obj 'nxtval) gen) ) ) |
---|
882 | |
---|
883 | ;; Parameterized generative set of random values "concept" |
---|
884 | (define-class <random-distribution> (<named> <parameterized> <stepper>) ( |
---|
885 | ;holds any value, temporarily |
---|
886 | tmpval ) ) |
---|
887 | |
---|
888 | ;; Create an instance of <random-distribution> where the arguments are |
---|
889 | ;; the same as the documented procedural distribution API. |
---|
890 | ;; |
---|
891 | ;; SRFI 27 API: ({some distribution constructor} arg...) |
---|
892 | ;; OO API: (make-random-distribution {some distribution constructor} arg...) |
---|
893 | (define-syntax make-random-distribution |
---|
894 | (syntax-rules () |
---|
895 | ((_ ?ctor ?arg0 ...) |
---|
896 | ;use tmpval to hold the ctor call form |
---|
897 | (make <random-distribution> 'tmpval (list ?ctor ?arg0 ...)) ) ) ) |
---|
898 | |
---|
899 | (define-method (initialize-instance (obj <random-distribution>)) |
---|
900 | ; The 'ctor' must be a globally defined procedure compiled with |
---|
901 | ; procedure-information. So if following nomenclature then the last |
---|
902 | ; procedure name element will be the kind of distribution: |
---|
903 | ; make-random-<distribution>. And the <random-source> will be the |
---|
904 | ; last argument. |
---|
905 | ; |
---|
906 | ; (I do not endorse this kind of "auto-magic". For example only.) |
---|
907 | (let* ( |
---|
908 | (tmpval |
---|
909 | (or |
---|
910 | (slot-value obj 'tmpval) |
---|
911 | `(,make-random-normals))) |
---|
912 | (ctor |
---|
913 | (car tmpval) ) |
---|
914 | (procinfo |
---|
915 | (procedure-information ctor)) |
---|
916 | (procname |
---|
917 | (and procinfo (pair? procinfo) (symbol->string (car procinfo)))) |
---|
918 | (procname |
---|
919 | (and |
---|
920 | procname |
---|
921 | (and-let* ((kndpos (string-index-right procname #\-))) |
---|
922 | (substring/shared procname (add1 kndpos))))) |
---|
923 | (dstr-vals |
---|
924 | (receive (apply ctor (cdr tmpval)))) |
---|
925 | (params |
---|
926 | (and |
---|
927 | (<= 2 (length dstr-vals)) |
---|
928 | (receive ((second dstr-vals))))) ) |
---|
929 | ;"free" the temp slot |
---|
930 | (set! (slot-value obj 'tmpval) #f) |
---|
931 | ;initialize state |
---|
932 | (set! (slot-value obj 'namsym) (string->symbol procname)) |
---|
933 | (set! (slot-value obj 'nxtval) (first dstr-vals)) |
---|
934 | (set! (slot-value obj 'ctor) ctor) |
---|
935 | (set! (slot-value obj 'params) (and params (drop-right params 1))) |
---|
936 | (set! (slot-value obj 'src) (and params (last params))) ) ) |
---|
937 | |
---|
938 | ;; Use it |
---|
939 | (use coops-extras) |
---|
940 | |
---|
941 | (define expn-rd (make-random-distribution make-random-exponentials mu: 0.5)) |
---|
942 | (describe-object expn-rd) |
---|
943 | ;coops instance of class `<random-distribution>': |
---|
944 | ;tmpval: #f |
---|
945 | ;namsym: exponentials |
---|
946 | ; ctor: #<procedure (srfi-27-exponentials#make-random-exponentials . tmp302303)> |
---|
947 | ;params: (0.5) |
---|
948 | ; src: #<procedure> |
---|
949 | ;nxtval: #<procedure (f_1191)> |
---|
950 | |
---|
951 | (next-value expn-rd) ;=> ... |
---|
952 | </enscript> |
---|
953 | |
---|
954 | |
---|
955 | == Notes |
---|
956 | |
---|
957 | * Due to the SRFI 27 requirement to generate numbers of any precision the |
---|
958 | "numbers" extension is always loaded. Be careful of creating a generator in a |
---|
959 | calling context where extended range is possible and consuming the results of |
---|
960 | the generator in a context without such range. |
---|
961 | |
---|
962 | * Portions by Sebastian Egner and Brad Lucier. (See the "book" SRFI 27 |
---|
963 | implementation.) |
---|
964 | |
---|
965 | |
---|
966 | == Bugs and Limitations |
---|
967 | |
---|
968 | * Support for 64-bit platforms is poor. Need to provide core random integer |
---|
969 | generators which are defined over the 64-bit integer range. Currently 64-bit |
---|
970 | fixnum bounds are processed as if using a 32-bit platform. However, due to the |
---|
971 | bignum implementation, results in the 64-bit fixnum range are coerced to fixnum. |
---|
972 | |
---|
973 | * The random distribution API is poorly documented. |
---|
974 | |
---|
975 | * The implementation API is not documented. See the source distribution. |
---|
976 | |
---|
977 | * Use of an entropy-source as a random-source is impossible without the |
---|
978 | undocumented implementation API. |
---|
979 | |
---|
980 | |
---|
981 | == Requirements |
---|
982 | |
---|
983 | [[miscmacros]] |
---|
984 | [[numbers]] |
---|
985 | [[check-errors]] |
---|
986 | [[vector-lib]] |
---|
987 | [[timed-resource]] |
---|
988 | [[mathh]] |
---|
989 | |
---|
990 | [[setup-helper]] |
---|
991 | |
---|
992 | [[test]] |
---|
993 | |
---|
994 | |
---|
995 | == Author |
---|
996 | |
---|
997 | [[/users/kon-lovett|Kon Lovett]] |
---|
998 | |
---|
999 | |
---|
1000 | == Version history |
---|
1001 | |
---|
1002 | ; 3.3.2 : Make {{entropy-source-random}} & {{entropy-source-urandom}} timed-resources. |
---|
1003 | ; 3.3.1 : Remove unfinished entropy-linux module per #1434. |
---|
1004 | ; 3.3.0 : Added 14 distribution modules. |
---|
1005 | ; 3.2.11 : Include {{composite-random-source}} & {{composite-entropy-source}}, since tested. |
---|
1006 | ; 3.2.10 : Uses test egg now. |
---|
1007 | ; 3.2.9 : Fix {{make-random-bernoullis}}, add distributions test. |
---|
1008 | ; 3.2.8 : . |
---|
1009 | ; 3.2.7 : Fix {{entropy-source-system-clock}} {{entropy-source-u8}}. |
---|
1010 | ; 3.2.6 : Add {{random-integer/current}}, {{random-real/current}}. Doesn't use synch, thread-utils eggs. Fix {{make-uniform-random-integers}}. |
---|
1011 | ; 3.2.5 : Revert to own clock entropy implementation. Fix vector map/fill. Use EXTERNAL-ID for name. |
---|
1012 | ; 3.2.4 : Error when unregistered source. |
---|
1013 | ; 3.2.3 : Rename registration -> source-registration. Fix {{random-source-entropy-source-set!}}, must accept {{#f}} {{entropy-source}}. Fix broken srfi-27-vector. |
---|
1014 | ; 3.2.2 : more tests. |
---|
1015 | ; 3.2.1 : fp-extn module. |
---|
1016 | ; 3.2.0 : Include registration.scm. |
---|
1017 | ; 3.1.9 : registration module. |
---|
1018 | ; 3.1.8 : Fix for ticket #630. |
---|
1019 | ; 3.1.7 : Fix for unsigned integer from entropic f64. |
---|
1020 | ; 3.1.6 : Fix for {{composite-random-source}} missing argument. |
---|
1021 | ; 3.1.5 : Fix for {{mrg32k3a}} bad state values. |
---|
1022 | ; 3.1.4 : Fix for {{mrg32k3a-pack-state}} bad index. |
---|
1023 | ; 3.1.3 : Fix for 64-bit fixnums and random integers. |
---|
1024 | ; 3.1.2 : Fix for "entropy-windows" {{make-entropy-source-crypt}}. |
---|
1025 | ; 3.1.1 : Moved thread stuff to own extensions. |
---|
1026 | ; 3.1.0 : Changed all {{random-source-name}} to lowercase symbols. Changed {{random-state}} tags to same as {{random-source-name}}. Added {{new-(random|entropy)-source}}, {{@(random|entropy)-source-constructor}} & {{(random|entropy)-source-name}}. Exported {{registered-(random|entropy)-sources}} & {{registered-(random|entropy)-source}}. |
---|
1027 | ; 3.0.1 : Bug fix for bad external state symbol. Use of 64-bit arithmetic instead of double in C code. |
---|
1028 | ; 3.0.0 : Initial release for Chicken 4 |
---|
1029 | |
---|
1030 | |
---|
1031 | == License |
---|
1032 | |
---|
1033 | Copyright (C) 2010-2017 Kon Lovett. All rights reserved. |
---|
1034 | |
---|
1035 | Permission is hereby granted, free of charge, to any person obtaining a |
---|
1036 | copy of this software and associated documentation files (the Software), |
---|
1037 | to deal in the Software without restriction, including without limitation |
---|
1038 | the rights to use, copy, modify, merge, publish, distribute, sublicense, |
---|
1039 | and/or sell copies of the Software, and to permit persons to whom the |
---|
1040 | Software is furnished to do so, subject to the following conditions: |
---|
1041 | |
---|
1042 | The above copyright notice and this permission notice shall be included |
---|
1043 | in all copies or substantial portions of the Software. |
---|
1044 | |
---|
1045 | THE SOFTWARE IS PROVIDED ASIS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
---|
1046 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
---|
1047 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
---|
1048 | THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
---|
1049 | OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
---|
1050 | ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
---|
1051 | OTHER DEALINGS IN THE SOFTWARE. |
---|
1052 | |
---|
1053 | Does not supercede any restrictions found in the source code. |
---|