jruby/src/org/jruby/RubyRandom.java at parallel_boot · MSNexploder/jruby · GitHub

History

719 lines (658 loc) · 26 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

451

452

453

454

455

456

457

458

459

460

461

462

463

464

465

466

467

468

469

470

471

472

473

474

475

476

477

478

479

480

481

482

483

484

485

486

487

488

489

490

491

492

493

494

495

496

497

498

499

500

501

502

503

504

505

506

507

508

509

510

511

512

513

514

515

516

517

518

519

520

521

522

523

524

525

526

527

528

529

530

531

532

533

534

535

536

537

538

539

540

541

542

543

544

545

546

547

548

549

550

551

552

553

554

555

556

557

558

559

560

561

562

563

564

565

566

567

568

569

570

571

572

573

574

575

576

577

578

579

580

581

582

583

584

585

586

587

588

589

590

591

592

593

594

595

596

597

598

599

600

601

602

603

604

605

606

607

608

609

610

611

612

613

614

615

616

617

618

619

620

621

622

623

624

625

626

627

628

629

630

631

632

633

634

635

636

637

638

639

640

641

642

643

644

645

646

647

648

649

650

651

652

653

654

655

656

657

658

659

660

661

662

663

664

665

666

667

668

669

670

671

672

673

674

675

676

677

678

679

680

681

682

683

684

685

686

687

688

689

690

691

692

693

694

695

696

697

698

699

700

701

702

703

704

705

706

707

708

709

710

711

712

713

714

715

716

717

718

719

/***** BEGIN LICENSE BLOCK *****

* Version: EPL 1.0/GPL 2.0/LGPL 2.1

* The contents of this file are subject to the Eclipse Public

* License Version 1.0 (the "License"); you may not use this file

* except in compliance with the License. You may obtain a copy of

* the License at http://www.eclipse.org/legal/epl-v10.html

* Software distributed under the License is distributed on an "AS

* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or

* implied. See the License for the specific language governing

* rights and limitations under the License.

* Alternatively, the contents of this file may be used under the terms of

* either of the GNU General Public License Version 2 or later (the "GPL"),

* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),

* in which case the provisions of the GPL or the LGPL are applicable instead

* of those above. If you wish to allow use of your version of this file only

* under the terms of either the GPL or the LGPL, and not to allow others to

* use your version of this file under the terms of the EPL, indicate your

* decision by deleting the provisions above and replace them with the notice

* and other provisions required by the GPL or the LGPL. If you do not delete

* the provisions above, a recipient may use your version of this file under

* the terms of any one of the EPL, the GPL or the LGPL.

***** END LICENSE BLOCK *****/

package org.jruby;

import java.math.BigInteger;

import org.jruby.anno.JRubyClass;

import org.jruby.anno.JRubyMethod;

import org.jruby.runtime.Helpers;

import org.jruby.runtime.ObjectAllocator;

import org.jruby.runtime.ThreadContext;

import static org.jruby.runtime.Visibility.PRIVATE;

import static org.jruby.CompatVersion.*;

import org.jruby.runtime.builtin.IRubyObject;

import org.jruby.util.ByteList;

import org.jruby.util.Random;

import org.jruby.util.TypeConverter;

/**

* Implementation of the Random class.

@JRubyClass(name = "Random")

public class RubyRandom extends RubyObject {

public static class RandomType {

private final IRubyObject seed;

private final Random mt;

RandomType(Ruby runtime) {

this(randomSeed(runtime));

}

// c: rand_init

RandomType(IRubyObject vseed) {

this.seed = vseed.convertToInteger();

if (seed instanceof RubyFixnum) {

long v = Math.abs(RubyNumeric.num2long(seed));

if (v == (v & 0xffffffffL)) {

this.mt = new Random((int) v);

} else {

int[] ints = new int[2];

ints[0] = (int) v;

ints[1] = (int) (v >> 32);

this.mt = new Random(ints);

}

} else if (seed instanceof RubyBignum) {

BigInteger big = ((RubyBignum) seed).getBigIntegerValue();

if (big.signum() < 0) {

big = big.abs();

}

byte[] buf = big.toByteArray();

int buflen = buf.length;

if (buf[0] == 0) {

buflen -= 1;

}

int len = Math.min((buflen + 3) / 4, Random.N);

int[] ints = bigEndianToInts(buf, len);

if (len <= 1) {

this.mt = new Random(ints[0]);

} else {

this.mt = new Random(ints);

}

} else {

throw vseed.getRuntime().newTypeError(

String.format("failed to convert %s into Integer", vseed.getMetaClass()

.getName()));

}

RandomType(IRubyObject vseed, RubyBignum state, int left) {

this.seed = vseed.convertToInteger();

byte[] bytes = state.getBigIntegerValue().toByteArray();

int[] ints = new int[bytes.length / 4];

for (int i = 0; i < ints.length; ++i) {

ints[i] = getIntBigIntegerBuffer(bytes, i);

}

this.mt = new Random(ints, left);

}

@Override

public boolean equals(Object obj) {

if (this == obj) {

return true;

} else if (!(obj instanceof RandomType)) {

return false;

}

RandomType rhs = (RandomType) obj;

return seed.op_equal(seed.getRuntime().getCurrentContext(), rhs.seed).isTrue()

&& mt.equals(rhs.mt);

}

@Override

public int hashCode() {

// Using 17 as the initializer, 37 as the multiplier.

return (629 + seed.hashCode()) * 37 + mt.hashCode();

}

RandomType(RandomType orig) {

this.seed = orig.seed;

this.mt = new Random(orig.mt);

}

int genrandInt32() {

return mt.genrandInt32();

}

double genrandReal() {

return mt.genrandReal();

}

double genrandReal2() {

return mt.genrandReal2();

}

IRubyObject getSeed() {

return seed;

}

RubyBignum getState() {

int[] ints = mt.getState();

byte[] bytes = new byte[ints.length * 4];

for (int idx = 0; idx < ints.length; ++idx) {

setIntBigIntegerBuffer(bytes, idx, ints[idx]);

}

return RubyBignum.newBignum(seed.getRuntime(), new BigInteger(bytes));

}

int getLeft() {

return mt.getLeft();

}

// big endian of bytes to reversed ints

private int[] bigEndianToInts(byte[] buf, int initKeyLen) {

int[] initKey = new int[initKeyLen];

for (int idx = 0; idx < initKey.length; ++idx) {

initKey[idx] = getIntBigIntegerBuffer(buf, idx);

}

return initKey;

}

static int getIntBigIntegerBuffer(byte[] src, int loc) {

int v = 0;

int idx = src.length - loc * 4 - 1;

if (idx >= 0) {

v |= (src[idx--] & 0xff);

if (idx >= 0) {

v |= (src[idx--] & 0xff) << 8;

if (idx >= 0) {

v |= (src[idx--] & 0xff) << 16;

if (idx >= 0) {

v |= (src[idx--] & 0xff) << 24;

}

return v;

}

static void setIntBigIntegerBuffer(byte[] dest, int loc, int value) {

int idx = dest.length - loc * 4 - 1;

if (idx >= 0) {

dest[idx--] = (byte) (value & 0xff);

if (idx >= 0) {

dest[idx--] = (byte) ((value >> 8) & 0xff);

if (idx >= 0) {

dest[idx--] = (byte) ((value >> 16) & 0xff);

if (idx >= 0) {

dest[idx--] = (byte) ((value >> 24) & 0xff);

}

private static final int DEFAULT_SEED_CNT = 4;

// c: random_seed

public static RubyBignum randomSeed(Ruby runtime) {

byte[] seed = new byte[DEFAULT_SEED_CNT * 4];

runtime.getRandom().nextBytes(seed);

return RubyBignum.newBignum(runtime, (new BigInteger(seed)).abs());

}

public static RubyClass createRandomClass(Ruby runtime) {

RubyClass randomClass = runtime

.defineClass("Random", runtime.getObject(), RANDOM_ALLOCATOR);

randomClass.defineAnnotatedMethods(RubyRandom.class);

RubyRandom defaultRand = new RubyRandom(runtime, randomClass);

defaultRand.random = new RandomType(randomSeed(runtime));

randomClass.setConstant("DEFAULT", defaultRand);

runtime.setDefaultRand(defaultRand.random);

runtime.setRandomClass(randomClass);

return randomClass;

}

private static ObjectAllocator RANDOM_ALLOCATOR = new ObjectAllocator() {

public IRubyObject allocate(Ruby runtime, RubyClass klass) {

return new RubyRandom(runtime, klass);

}

};

private RandomType random = null;

RubyRandom(Ruby runtime, RubyClass rubyClass) {

super(runtime, rubyClass);

}

@JRubyMethod(visibility = PRIVATE, optional = 1, compat = RUBY1_9)

public IRubyObject initialize(ThreadContext context, IRubyObject[] args) {

random = new RandomType((args.length == 0) ? randomSeed(context.runtime) : args[0]);

return this;

}

@JRubyMethod(name = "seed", compat = RUBY1_9)

public IRubyObject seed(ThreadContext context) {

return random.getSeed();

}

@JRubyMethod(name = "initialize_copy", required = 1, visibility = PRIVATE)

@Override

public IRubyObject initialize_copy(IRubyObject orig) {

if (!(orig instanceof RubyRandom)) {

throw getRuntime().newTypeError(

String.format("wrong argument type %s (expected %s)", orig.getMetaClass()

.getName(), getMetaClass().getName()));

}

random = new RandomType(((RubyRandom) orig).random);

return this;

}

@JRubyMethod(name = "rand", meta = true, optional = 1, compat = RUBY1_9)

public static IRubyObject rand(ThreadContext context, IRubyObject recv, IRubyObject[] args) {

return randCommon19(context, recv, args);

}

// c: rb_f_rand for 1.9

public static IRubyObject randCommon19(ThreadContext context, IRubyObject recv,

IRubyObject[] args) {

RandomType random = getDefaultRand(context);

if (args.length == 0) {

return randFloat(context, random);

}

IRubyObject arg = args[0];

if (arg.isNil()) {

return randFloat(context, random);

}

if (arg instanceof RubyRange) {

return randomRand(context, arg, random);

}

RubyInteger max = arg.convertToInteger();

return randCommon(context, random, max);

}

// c: rb_f_rand for 1.8

public static IRubyObject randCommon18(ThreadContext context, IRubyObject recv,

IRubyObject[] args) {

RandomType random = getDefaultRand(context);

if (args.length == 0) {

return randFloat(context, random);

}

IRubyObject arg = args[0];

if (arg.isNil()) {

return randFloat(context, random);

}

// 1.8 calls rb_Integer()

RubyInteger max = (RubyInteger) RubyKernel.new_integer(context, recv, arg);

return randCommon(context, random, max);

}

private static IRubyObject randCommon(ThreadContext context, RandomType random, RubyInteger max) {

if (max.zero_p(context).isTrue()) {

return randFloat(context, random);

}

IRubyObject r = randInt(context, random, max, false);

if (r.isNil()) {

return randFloat(context, random);

}

return r;

}

@JRubyMethod(name = "rand", optional = 1, compat = RUBY1_9)

public IRubyObject randObj(ThreadContext context, IRubyObject[] args) {

if (args.length == 0) {

return randFloat(context, random);

} else {

return randomRand(context, args[0], random);

}

// c: rand_int

private static IRubyObject randInt(ThreadContext context, RandomType random, RubyInteger vmax,

boolean restrictive) {

if (vmax instanceof RubyFixnum) {

long max = RubyNumeric.fix2long(vmax);

if (max == 0) {

return context.nil;

}

if (max < 0) {

if (restrictive) {

return context.nil;

}

max = -max;

}

return randLimitedFixnum(context, random, max - 1);

} else {

BigInteger big = vmax.getBigIntegerValue();

if (big.equals(BigInteger.ZERO)) {

return context.nil;

}

if (big.signum() < 0) {

if (restrictive) {

return context.nil;

}

big = big.abs();

}

big = big.subtract(BigInteger.ONE);

return randLimitedBignum(context, random, RubyBignum.newBignum(context.runtime, big));

}

public static RubyFloat randFloat(ThreadContext context, RandomType random) {

return context.runtime.newFloat(random.genrandReal());

}

// c: limited_rand

// limited_rand gets/returns ulong but we do this in signed long only.

private static IRubyObject randLimitedFixnum(ThreadContext context, RandomType random,

long limit) {

long val;

if (limit == 0) {

val = 0;

} else {

long mask = makeMask(limit);

// take care before code cleanup; it might break random sequence compatibility

retry: while (true) {

val = 0;

for (int i = 1; 0 <= i; --i) {

if (((mask >>> (i * 32)) & 0xffffffffL) != 0) {

val |= (random.genrandInt32() & 0xffffffffL) << (i * 32);

val &= mask;

}

if (limit < val) {

continue retry;

}

break;

}

return context.runtime.newFixnum(val);

}

// c: limited_big_rand

private static IRubyObject randLimitedBignum(ThreadContext context, RandomType random,

RubyBignum limit) {

byte[] buf = limit.getBigIntegerValue().toByteArray();

byte[] bytes = new byte[buf.length];

int len = (buf.length + 3) / 4;

// take care before code cleanup; it might break random sequence compatibility

retry: while (true) {

long mask = 0;

boolean boundary = true;

for (int idx = len - 1; 0 <= idx; --idx) {

long lim = getIntBigIntegerBuffer(buf, idx) & 0xffffffffL;

mask = (mask != 0) ? 0xffffffffL : makeMask(lim);

long rnd;

if (mask != 0) {

rnd = (random.genrandInt32() & 0xffffffffL) & mask;

if (boundary) {

if (lim < rnd) {

continue retry;

}

if (rnd < lim) {

boundary = false;

}

} else {

rnd = 0;

}

setIntBigIntegerBuffer(bytes, idx, (int) rnd);

}

break;

}

return RubyBignum.newBignum(context.runtime, new BigInteger(bytes));

}

private static long makeMask(long x) {

x = x | x >>> 1;

x = x | x >>> 2;

x = x | x >>> 4;

x = x | x >>> 8;

x = x | x >>> 16;

x = x | x >>> 32;

return x;

}

private static RandomType getDefaultRand(ThreadContext context) {

return context.runtime.getDefaultRand();

}

// c: random_rand

private static IRubyObject randomRand(ThreadContext context, IRubyObject vmax, RandomType random) {

IRubyObject v = null;

RangeLike range = null;

if (vmax.isNil()) {

v = context.nil;

} else if ((v = checkMaxInt(context, vmax)) != null) {

v = randInt(context, random, (RubyInteger) v, true);

} else if (!(v = TypeConverter.checkFloatType(context.runtime, vmax)).isNil()) {

double max = floatValue(v);

if (max > 0.0) {

v = context.runtime.newFloat(max * random.genrandReal());

} else {

v = context.nil;

}

} else if ((range = rangeValues(context, vmax)) != null) {

if ((v = checkMaxInt(context, range.range)) != null) {

if (v instanceof RubyFixnum) {

long max = ((RubyFixnum) v).getLongValue();

if (range.excl) {

max -= 1;

}

if (max >= 0) {

v = randLimitedFixnum(context, random, max);

} else {

v = context.nil;

}

} else if (v instanceof RubyBignum) {

BigInteger big = ((RubyBignum) v).getBigIntegerValue();

if (!big.equals(BigInteger.ZERO) && (big.signum() > 0)) {

if (range.excl) {

big = big.subtract(BigInteger.ONE);

}

v = randLimitedBignum(context, random, RubyBignum.newBignum(

context.runtime, big));

} else {

v = context.nil;

}

} else {

v = context.nil;

}

} else if (!(v = TypeConverter.checkFloatType(context.runtime, range.range)).isNil()) {

int scale = 1;

double max = ((RubyFloat) v).getDoubleValue();

double mid = 0.5;

double r = 0.0;

if (Double.isInfinite(max)) {

double min = floatValue(range.begin) / 2.0;

max = floatValue(range.end) / 2.0;

scale = 2;

mid = max + min;

max -= min;

} else {

floatValue(v);

}

v = context.nil;

if (max > 0.0) {

if (range.excl) {

r = random.genrandReal();

} else {

r = random.genrandReal2();

}

if (scale > 1) {

return context.runtime.newFloat(+(+(+(r - 0.5) * max) * scale) + mid);

}

v = context.runtime.newFloat(r * max);

} else if (max == 0.0 && !range.excl) {

v = context.runtime.newFloat(0.0);

}

} else {

v = context.nil;

RubyNumeric.num2long(vmax); // need check here to raise TypeError

}

if (v.isNil()) {

throw context.runtime.newArgumentError("invalid argument - " + vmax.toString());

}

if (range == null) {

return v;

}

if ((range.begin instanceof RubyFixnum) && (v instanceof RubyFixnum)) {

long x = ((RubyFixnum) range.begin).getLongValue() + ((RubyFixnum) v).getLongValue();

return context.runtime.newFixnum(x);

}

if (v instanceof RubyBignum) {

return ((RubyBignum) v).op_plus(context, range.begin);

} else if (v instanceof RubyFloat) {

IRubyObject f = TypeConverter.checkFloatType(context.runtime, range.begin);

if (!f.isNil()) {

return ((RubyFloat) v).op_plus(context, f);

}

return Helpers.invoke(context, range.begin, "+", v);

}

// c: float_value

private static double floatValue(IRubyObject v) {

double x;

if (v instanceof RubyFloat) {

x = ((RubyFloat) v).getDoubleValue();

} else if (v instanceof RubyNumeric) {

x = ((RubyNumeric) v).convertToFloat().getDoubleValue();

} else {

throw v.getRuntime().newTypeError(v, v.getRuntime().getFloat());

}

if (Double.isInfinite(x) || Double.isNaN(x)) {

throw v.getRuntime().newErrnoEDOMError("Numerical argument out of domain");

}

return x;

}

private static IRubyObject checkMaxInt(ThreadContext context, IRubyObject vmax) {

if (!(vmax instanceof RubyFloat)) {

IRubyObject v = TypeConverter.checkIntegerType(context.runtime, vmax, "to_int");

if (!v.isNil()) {

return v;

}

return null;

}

static class RangeLike {

public IRubyObject begin = null;

public IRubyObject end = null;

boolean excl = false;

public IRubyObject range = null;

}

private static RangeLike rangeValues(ThreadContext context, IRubyObject range) {

RangeLike like = new RangeLike();

if (range instanceof RubyRange) {

RubyRange vrange = (RubyRange) range;

like.begin = vrange.first();

like.end = vrange.last();

like.excl = vrange.exclude_end_p().isTrue();

} else {

if (!range.respondsTo("begin") || !range.respondsTo("end")

|| !range.respondsTo("exclude_end?")) {

return null;

}

like.begin = Helpers.invoke(context, range, "begin");

like.end = Helpers.invoke(context, range, "end");

like.excl = Helpers.invoke(context, range, "exlucde_end?").isTrue();

}

like.range = Helpers.invoke(context, like.end, "-", like.begin);

return like;

}

@JRubyMethod(meta = true, compat = RUBY1_9)

public static IRubyObject srand(ThreadContext context, IRubyObject recv) {

return srandCommon(context, recv);

}

@JRubyMethod(meta = true, compat = RUBY1_9)

public static IRubyObject srand(ThreadContext context, IRubyObject recv, IRubyObject seed) {

return srandCommon(context, recv, seed);

}

// c: rb_f_srand

public static IRubyObject srandCommon(ThreadContext context, IRubyObject recv) {

return srandCommon(context, recv, randomSeed(context.runtime));

}

// c: rb_f_srand

public static IRubyObject srandCommon(ThreadContext context, IRubyObject recv,

IRubyObject newSeed) {

RandomType defaultRand = getDefaultRand(context);

IRubyObject previousSeed = defaultRand.getSeed();

defaultRand = new RandomType(newSeed);

context.runtime.setDefaultRand(defaultRand);

if (context.runtime.is1_9()) {

((RubyRandom) (context.runtime.getRandomClass())

.getConstant("DEFAULT")).setRandomType(defaultRand);

}

return previousSeed;

}

// c: random_equal

@Override

@JRubyMethod(name = "==", required = 1, compat = RUBY1_9)

public IRubyObject op_equal_19(ThreadContext context, IRubyObject obj) {

if (!getType().equals(obj.getType())) {

return context.runtime.getFalse();

}

return context.runtime.newBoolean(random.equals(((RubyRandom) obj).random));

}

// c: random_state

@JRubyMethod(name = "state", visibility = PRIVATE, compat = RUBY1_9)

public IRubyObject stateObj(ThreadContext context) {

return random.getState();

}

// c: random_left

@JRubyMethod(name = "left", visibility = PRIVATE, compat = RUBY1_9)

public IRubyObject leftObj(ThreadContext context) {

return RubyNumeric.int2fix(context.runtime, random.getLeft());

}

// c: random_s_state

@JRubyMethod(name = "state", meta = true, visibility = PRIVATE, compat = RUBY1_9)

public static IRubyObject state(ThreadContext context, IRubyObject recv) {

return getDefaultRand(context).getState();

}

// c: random_s_left

@JRubyMethod(name = "left", meta = true, visibility = PRIVATE, compat = RUBY1_9)

public static IRubyObject left(ThreadContext context, IRubyObject recv) {

return RubyNumeric.int2fix(context.runtime, getDefaultRand(context).getLeft());

}

// c: random_dump

@JRubyMethod(name = "marshal_dump", compat = RUBY1_9)

public IRubyObject marshal_dump(ThreadContext context) {

RubyBignum state = random.getState();

RubyInteger left = (RubyInteger) RubyNumeric.int2fix(context.runtime, random.getLeft());

RubyArray dump = context.runtime.newArray(state, left, random.getSeed());

if (hasVariables()) {

dump.syncVariables(this);

}

return dump;

}

// c: marshal_load

@JRubyMethod(compat = RUBY1_9)

public IRubyObject marshal_load(ThreadContext context, IRubyObject arg) {

RubyArray load = arg.convertToArray();

if (load.size() != 3) {

throw context.runtime.newArgumentError("wrong dump data");

}

if (!(load.eltInternal(0) instanceof RubyBignum)) {

throw context.runtime.newTypeError(load.eltInternal(0), context.runtime.getBignum());

}

RubyBignum state = (RubyBignum) load.eltInternal(0);

int left = RubyNumeric.num2int(load.eltInternal(1));

IRubyObject seed = load.eltInternal(2);

random = new RandomType(seed, state, left);

if (load.hasVariables()) {

syncVariables((IRubyObject) load);

}

return this;

}

// c: rb_random_bytes

@JRubyMethod(name = "bytes", compat = RUBY1_9)

public IRubyObject bytes(ThreadContext context, IRubyObject arg) {

int n = RubyNumeric.num2int(arg);

byte[] bytes = new byte[n];

int idx = 0;

for (; n >= 4; n -= 4) {

int r = random.genrandInt32();

for (int i = 0; i < 4; ++i) {

bytes[idx++] = (byte) (r & 0xff);

r >>>= 8;

}

if (n > 0) {

int r = random.genrandInt32();

for (int i = 0; i < n; ++i) {

bytes[idx++] = (byte) (r & 0xff);

r >>>= 8;

}

return context.runtime.newString(new ByteList(bytes));

}

// c: rb_random_real

public static double randomReal(ThreadContext context, IRubyObject obj) {

RandomType random = null;

if (obj.equals(context.runtime.getRandomClass())) {

random = getDefaultRand(context);

}

if (obj instanceof RubyRandom) {

random = ((RubyRandom) obj).random;

}

if (random != null) {

return random.genrandReal();

}

double d = RubyNumeric.num2dbl(Helpers.invoke(context, obj, "rand"));

if (d < 0.0 || d >= 1.0) {

throw context.runtime.newRangeError("random number too big: " + d);

}

return d;

}

@JRubyMethod(name = "new_seed", meta = true, compat = RUBY1_9)

public static IRubyObject newSeed(ThreadContext context, IRubyObject recv) {

return randomSeed(context.runtime);

}

private void setRandomType(RandomType random) {

this.random = random;

}

jruby/src/org/jruby/RubyRandom.java at parallel_boot · MSNexploder/jruby · GitHub

Expand file tree

Breadcrumbs

RubyRandom.java

Latest commit

History

Breadcrumbs

RubyRandom.java

File metadata and controls