cpython/Objects/stringlib/codecs.h at print-statement · python-emscripten/cpython · GitHub

Repository navigation

History

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

720

721

722

723

724

725

726

727

728

729

730

731

732

733

734

735

736

737

738

739

740

741

742

743

744

745

746

747

748

749

750

751

752

753

754

755

756

757

758

759

760

761

762

763

764

765

766

767

768

769

770

771

772

773

774

775

776

777

778

779

780

781

782

783

784

785

786

787

788

789

790

791

792

793

794

795

796

797

798

799

800

801

802

803

804

805

806

807

808

809

810

811

812

813

814

815

816

817

818

819

820

821

822

823

824

825

/* stringlib: codec implementations */

#if !STRINGLIB_IS_UNICODE

# error "codecs.h is specific to Unicode"

#endif

#include "pycore_bitutils.h" // _Py_bswap32()

/* Mask to quickly check whether a C 'long' contains a

non-ASCII, UTF8-encoded char. */

#if (SIZEOF_LONG == 8)

# define ASCII_CHAR_MASK 0x8080808080808080UL

#elif (SIZEOF_LONG == 4)

# define ASCII_CHAR_MASK 0x80808080UL

#else

# error C 'long' size should be either 4 or 8!

#endif

/* 10xxxxxx */

#define IS_CONTINUATION_BYTE(ch) ((ch) >= 0x80 && (ch) < 0xC0)

Py_LOCAL_INLINE(Py_UCS4)

STRINGLIB(utf8_decode)(const char **inptr, const char *end,

STRINGLIB_CHAR *dest,

Py_ssize_t *outpos)

{

Py_UCS4 ch;

const char *s = *inptr;

const char *aligned_end = (const char *) _Py_ALIGN_DOWN(end, SIZEOF_LONG);

STRINGLIB_CHAR *p = dest + *outpos;

while (s < end) {

ch = (unsigned char)*s;

if (ch < 0x80) {

/* Fast path for runs of ASCII characters. Given that common UTF-8

input will consist of an overwhelming majority of ASCII

characters, we try to optimize for this case by checking

as many characters as a C 'long' can contain.

First, check if we can do an aligned read, as most CPUs have

a penalty for unaligned reads.

if (_Py_IS_ALIGNED(s, SIZEOF_LONG)) {

/* Help register allocation */

const char *_s = s;

STRINGLIB_CHAR *_p = p;

while (_s < aligned_end) {

/* Read a whole long at a time (either 4 or 8 bytes),

and do a fast unrolled copy if it only contains ASCII

characters. */

unsigned long value = *(const unsigned long *) _s;

if (value & ASCII_CHAR_MASK)

break;

#if PY_LITTLE_ENDIAN

_p[0] = (STRINGLIB_CHAR)(value & 0xFFu);

_p[1] = (STRINGLIB_CHAR)((value >> 8) & 0xFFu);

_p[2] = (STRINGLIB_CHAR)((value >> 16) & 0xFFu);

_p[3] = (STRINGLIB_CHAR)((value >> 24) & 0xFFu);

# if SIZEOF_LONG == 8

_p[4] = (STRINGLIB_CHAR)((value >> 32) & 0xFFu);

_p[5] = (STRINGLIB_CHAR)((value >> 40) & 0xFFu);

_p[6] = (STRINGLIB_CHAR)((value >> 48) & 0xFFu);

_p[7] = (STRINGLIB_CHAR)((value >> 56) & 0xFFu);

# endif

#else

# if SIZEOF_LONG == 8

_p[0] = (STRINGLIB_CHAR)((value >> 56) & 0xFFu);

_p[1] = (STRINGLIB_CHAR)((value >> 48) & 0xFFu);

_p[2] = (STRINGLIB_CHAR)((value >> 40) & 0xFFu);

_p[3] = (STRINGLIB_CHAR)((value >> 32) & 0xFFu);

_p[4] = (STRINGLIB_CHAR)((value >> 24) & 0xFFu);

_p[5] = (STRINGLIB_CHAR)((value >> 16) & 0xFFu);

_p[6] = (STRINGLIB_CHAR)((value >> 8) & 0xFFu);

_p[7] = (STRINGLIB_CHAR)(value & 0xFFu);

# else

_p[0] = (STRINGLIB_CHAR)((value >> 24) & 0xFFu);

_p[1] = (STRINGLIB_CHAR)((value >> 16) & 0xFFu);

_p[2] = (STRINGLIB_CHAR)((value >> 8) & 0xFFu);

_p[3] = (STRINGLIB_CHAR)(value & 0xFFu);

# endif

#endif

_s += SIZEOF_LONG;

_p += SIZEOF_LONG;

}

s = _s;

p = _p;

if (s == end)

break;

ch = (unsigned char)*s;

}

if (ch < 0x80) {

s++;

*p++ = ch;

continue;

}

if (ch < 0xE0) {

/* \xC2\x80-\xDF\xBF -- 0080-07FF */

Py_UCS4 ch2;

if (ch < 0xC2) {

/* invalid sequence

\x80-\xBF -- continuation byte

\xC0-\xC1 -- fake 0000-007F */

goto InvalidStart;

}

if (end - s < 2) {

/* unexpected end of data: the caller will decide whether

it's an error or not */

break;

}

ch2 = (unsigned char)s[1];

if (!IS_CONTINUATION_BYTE(ch2))

/* invalid continuation byte */

goto InvalidContinuation1;

ch = (ch << 6) + ch2 -

((0xC0 << 6) + 0x80);

assert ((ch > 0x007F) && (ch <= 0x07FF));

s += 2;

if (STRINGLIB_MAX_CHAR <= 0x007F ||

(STRINGLIB_MAX_CHAR < 0x07FF && ch > STRINGLIB_MAX_CHAR))

/* Out-of-range */

goto Return;

*p++ = ch;

continue;

}

if (ch < 0xF0) {

/* \xE0\xA0\x80-\xEF\xBF\xBF -- 0800-FFFF */

Py_UCS4 ch2, ch3;

if (end - s < 3) {

/* unexpected end of data: the caller will decide whether

it's an error or not */

if (end - s < 2)

break;

ch2 = (unsigned char)s[1];

if (!IS_CONTINUATION_BYTE(ch2) ||

(ch2 < 0xA0 ? ch == 0xE0 : ch == 0xED))

/* for clarification see comments below */

goto InvalidContinuation1;

break;

}

ch2 = (unsigned char)s[1];

ch3 = (unsigned char)s[2];

if (!IS_CONTINUATION_BYTE(ch2)) {

/* invalid continuation byte */

goto InvalidContinuation1;

}

if (ch == 0xE0) {

if (ch2 < 0xA0)

/* invalid sequence

\xE0\x80\x80-\xE0\x9F\xBF -- fake 0000-0800 */

goto InvalidContinuation1;

} else if (ch == 0xED && ch2 >= 0xA0) {

/* Decoding UTF-8 sequences in range \xED\xA0\x80-\xED\xBF\xBF

will result in surrogates in range D800-DFFF. Surrogates are

not valid UTF-8 so they are rejected.

See https://www.unicode.org/versions/Unicode5.2.0/ch03.pdf

(table 3-7) and http://www.rfc-editor.org/rfc/rfc3629.txt */

goto InvalidContinuation1;

}

if (!IS_CONTINUATION_BYTE(ch3)) {

/* invalid continuation byte */

goto InvalidContinuation2;

}

ch = (ch << 12) + (ch2 << 6) + ch3 -

((0xE0 << 12) + (0x80 << 6) + 0x80);

assert ((ch > 0x07FF) && (ch <= 0xFFFF));

s += 3;

if (STRINGLIB_MAX_CHAR <= 0x07FF ||

(STRINGLIB_MAX_CHAR < 0xFFFF && ch > STRINGLIB_MAX_CHAR))

/* Out-of-range */

goto Return;

*p++ = ch;

continue;

}

if (ch < 0xF5) {

/* \xF0\x90\x80\x80-\xF4\x8F\xBF\xBF -- 10000-10FFFF */

Py_UCS4 ch2, ch3, ch4;

if (end - s < 4) {

/* unexpected end of data: the caller will decide whether

it's an error or not */

if (end - s < 2)

break;

ch2 = (unsigned char)s[1];

if (!IS_CONTINUATION_BYTE(ch2) ||

(ch2 < 0x90 ? ch == 0xF0 : ch == 0xF4))

/* for clarification see comments below */

goto InvalidContinuation1;

if (end - s < 3)

break;

ch3 = (unsigned char)s[2];

if (!IS_CONTINUATION_BYTE(ch3))

goto InvalidContinuation2;

break;

}

ch2 = (unsigned char)s[1];

ch3 = (unsigned char)s[2];

ch4 = (unsigned char)s[3];

if (!IS_CONTINUATION_BYTE(ch2)) {

/* invalid continuation byte */

goto InvalidContinuation1;

}

if (ch == 0xF0) {

if (ch2 < 0x90)

/* invalid sequence

\xF0\x80\x80\x80-\xF0\x8F\xBF\xBF -- fake 0000-FFFF */

goto InvalidContinuation1;

} else if (ch == 0xF4 && ch2 >= 0x90) {

/* invalid sequence

\xF4\x90\x80\x80- -- 110000- overflow */

goto InvalidContinuation1;

}

if (!IS_CONTINUATION_BYTE(ch3)) {

/* invalid continuation byte */

goto InvalidContinuation2;

}

if (!IS_CONTINUATION_BYTE(ch4)) {

/* invalid continuation byte */

goto InvalidContinuation3;

}

ch = (ch << 18) + (ch2 << 12) + (ch3 << 6) + ch4 -

((0xF0 << 18) + (0x80 << 12) + (0x80 << 6) + 0x80);

assert ((ch > 0xFFFF) && (ch <= 0x10FFFF));

s += 4;

if (STRINGLIB_MAX_CHAR <= 0xFFFF ||

(STRINGLIB_MAX_CHAR < 0x10FFFF && ch > STRINGLIB_MAX_CHAR))

/* Out-of-range */

goto Return;

*p++ = ch;

continue;

}

goto InvalidStart;

}

ch = 0;

Return:

*inptr = s;

*outpos = p - dest;

return ch;

InvalidStart:

ch = 1;

goto Return;

InvalidContinuation1:

ch = 2;

goto Return;

InvalidContinuation2:

ch = 3;

goto Return;

InvalidContinuation3:

ch = 4;

goto Return;

}

#undef ASCII_CHAR_MASK

/* UTF-8 encoder specialized for a Unicode kind to avoid the slow

PyUnicode_READ() macro. Delete some parts of the code depending on the kind:

UCS-1 strings don't need to handle surrogates for example. */

Py_LOCAL_INLINE(char *)

STRINGLIB(utf8_encoder)(_PyBytesWriter *writer,

PyObject *unicode,

const STRINGLIB_CHAR *data,

Py_ssize_t size,

_Py_error_handler error_handler,

const char *errors)

{

Py_ssize_t i; /* index into data of next input character */

char *p; /* next free byte in output buffer */

#if STRINGLIB_SIZEOF_CHAR > 1

PyObject *error_handler_obj = NULL;

PyObject *exc = NULL;

PyObject *rep = NULL;

#endif

#if STRINGLIB_SIZEOF_CHAR == 1

const Py_ssize_t max_char_size = 2;

#elif STRINGLIB_SIZEOF_CHAR == 2

const Py_ssize_t max_char_size = 3;

#else /* STRINGLIB_SIZEOF_CHAR == 4 */

const Py_ssize_t max_char_size = 4;

#endif

assert(size >= 0);

if (size > PY_SSIZE_T_MAX / max_char_size) {

/* integer overflow */

PyErr_NoMemory();

return NULL;

}

_PyBytesWriter_Init(writer);

p = _PyBytesWriter_Alloc(writer, size * max_char_size);

if (p == NULL)

return NULL;

for (i = 0; i < size;) {

Py_UCS4 ch = data[i++];

if (ch < 0x80) {

/* Encode ASCII */

*p++ = (char) ch;

}

else

#if STRINGLIB_SIZEOF_CHAR > 1

if (ch < 0x0800)

#endif

{

/* Encode Latin-1 */

*p++ = (char)(0xc0 | (ch >> 6));

*p++ = (char)(0x80 | (ch & 0x3f));

}

#if STRINGLIB_SIZEOF_CHAR > 1

else if (Py_UNICODE_IS_SURROGATE(ch)) {

Py_ssize_t startpos, endpos, newpos;

Py_ssize_t k;

if (error_handler == _Py_ERROR_UNKNOWN) {

error_handler = _Py_GetErrorHandler(errors);

}

startpos = i-1;

endpos = startpos+1;

while ((endpos < size) && Py_UNICODE_IS_SURROGATE(data[endpos]))

endpos++;

/* Only overallocate the buffer if it's not the last write */

writer->overallocate = (endpos < size);

switch (error_handler)

{

case _Py_ERROR_REPLACE:

memset(p, '?', endpos - startpos);

p += (endpos - startpos);

/* fall through */

case _Py_ERROR_IGNORE:

i += (endpos - startpos - 1);

break;

case _Py_ERROR_SURROGATEPASS:

for (k=startpos; k<endpos; k++) {

ch = data[k];

*p++ = (char)(0xe0 | (ch >> 12));

*p++ = (char)(0x80 | ((ch >> 6) & 0x3f));

*p++ = (char)(0x80 | (ch & 0x3f));

}

i += (endpos - startpos - 1);

break;

case _Py_ERROR_BACKSLASHREPLACE:

/* subtract preallocated bytes */

writer->min_size -= max_char_size * (endpos - startpos);

p = backslashreplace(writer, p,

unicode, startpos, endpos);

if (p == NULL)

goto error;

i += (endpos - startpos - 1);

break;

case _Py_ERROR_XMLCHARREFREPLACE:

/* subtract preallocated bytes */

writer->min_size -= max_char_size * (endpos - startpos);

p = xmlcharrefreplace(writer, p,

unicode, startpos, endpos);

if (p == NULL)

goto error;

i += (endpos - startpos - 1);

break;

case _Py_ERROR_SURROGATEESCAPE:

for (k=startpos; k<endpos; k++) {

ch = data[k];

if (!(0xDC80 <= ch && ch <= 0xDCFF))

break;

*p++ = (char)(ch & 0xff);

}

if (k >= endpos) {

i += (endpos - startpos - 1);

break;

}

startpos = k;

assert(startpos < endpos);

/* fall through */

default:

rep = unicode_encode_call_errorhandler(

errors, &error_handler_obj, "utf-8", "surrogates not allowed",

unicode, &exc, startpos, endpos, &newpos);

if (!rep)

goto error;

/* subtract preallocated bytes */

writer->min_size -= max_char_size * (newpos - startpos);

if (PyBytes_Check(rep)) {

p = _PyBytesWriter_WriteBytes(writer, p,

PyBytes_AS_STRING(rep),

PyBytes_GET_SIZE(rep));

}

else {

/* rep is unicode */

if (PyUnicode_READY(rep) < 0)

goto error;

if (!PyUnicode_IS_ASCII(rep)) {

raise_encode_exception(&exc, "utf-8", unicode,

startpos, endpos,

"surrogates not allowed");

goto error;

}

p = _PyBytesWriter_WriteBytes(writer, p,

PyUnicode_DATA(rep),

PyUnicode_GET_LENGTH(rep));

}

if (p == NULL)

goto error;

Py_CLEAR(rep);

i = newpos;

}

/* If overallocation was disabled, ensure that it was the last

write. Otherwise, we missed an optimization */

assert(writer->overallocate || i == size);

}

else

#if STRINGLIB_SIZEOF_CHAR > 2

if (ch < 0x10000)

#endif

{

*p++ = (char)(0xe0 | (ch >> 12));

*p++ = (char)(0x80 | ((ch >> 6) & 0x3f));

*p++ = (char)(0x80 | (ch & 0x3f));

}

#if STRINGLIB_SIZEOF_CHAR > 2

else /* ch >= 0x10000 */

{

assert(ch <= MAX_UNICODE);

/* Encode UCS4 Unicode ordinals */

*p++ = (char)(0xf0 | (ch >> 18));

*p++ = (char)(0x80 | ((ch >> 12) & 0x3f));

*p++ = (char)(0x80 | ((ch >> 6) & 0x3f));

*p++ = (char)(0x80 | (ch & 0x3f));

}

#endif /* STRINGLIB_SIZEOF_CHAR > 2 */

#endif /* STRINGLIB_SIZEOF_CHAR > 1 */

}

#if STRINGLIB_SIZEOF_CHAR > 1

Py_XDECREF(error_handler_obj);

Py_XDECREF(exc);

#endif

return p;

#if STRINGLIB_SIZEOF_CHAR > 1

error:

Py_XDECREF(rep);

Py_XDECREF(error_handler_obj);

Py_XDECREF(exc);

return NULL;

#endif

}

/* The pattern for constructing UCS2-repeated masks. */

#if SIZEOF_LONG == 8

# define UCS2_REPEAT_MASK 0x0001000100010001ul

#elif SIZEOF_LONG == 4

# define UCS2_REPEAT_MASK 0x00010001ul

#else

# error C 'long' size should be either 4 or 8!

#endif

/* The mask for fast checking. */

#if STRINGLIB_SIZEOF_CHAR == 1

/* The mask for fast checking of whether a C 'long' contains a

non-ASCII or non-Latin1 UTF16-encoded characters. */

# define FAST_CHAR_MASK (UCS2_REPEAT_MASK * (0xFFFFu & ~STRINGLIB_MAX_CHAR))

#else

/* The mask for fast checking of whether a C 'long' may contain

UTF16-encoded surrogate characters. This is an efficient heuristic,

assuming that non-surrogate characters with a code point >= 0x8000 are

rare in most input.

# define FAST_CHAR_MASK (UCS2_REPEAT_MASK * 0x8000u)

#endif

/* The mask for fast byte-swapping. */

#define STRIPPED_MASK (UCS2_REPEAT_MASK * 0x00FFu)

/* Swap bytes. */

#define SWAB(value) ((((value) >> 8) & STRIPPED_MASK) | \

(((value) & STRIPPED_MASK) << 8))

Py_LOCAL_INLINE(Py_UCS4)

STRINGLIB(utf16_decode)(const unsigned char **inptr, const unsigned char *e,

STRINGLIB_CHAR *dest, Py_ssize_t *outpos,

int native_ordering)

{

Py_UCS4 ch;

const unsigned char *aligned_end =

(const unsigned char *) _Py_ALIGN_DOWN(e, SIZEOF_LONG);

const unsigned char *q = *inptr;

STRINGLIB_CHAR *p = dest + *outpos;

/* Offsets from q for retrieving byte pairs in the right order. */

#if PY_LITTLE_ENDIAN

int ihi = !!native_ordering, ilo = !native_ordering;

#else

int ihi = !native_ordering, ilo = !!native_ordering;

#endif

--e;

while (q < e) {

Py_UCS4 ch2;

/* First check for possible aligned read of a C 'long'. Unaligned

reads are more expensive, better to defer to another iteration. */

if (_Py_IS_ALIGNED(q, SIZEOF_LONG)) {

/* Fast path for runs of in-range non-surrogate chars. */

const unsigned char *_q = q;

while (_q < aligned_end) {

unsigned long block = * (const unsigned long *) _q;

if (native_ordering) {

/* Can use buffer directly */

if (block & FAST_CHAR_MASK)

break;

}

else {

/* Need to byte-swap */

if (block & SWAB(FAST_CHAR_MASK))

break;

#if STRINGLIB_SIZEOF_CHAR == 1

block >>= 8;

#else

block = SWAB(block);

#endif

}

#if PY_LITTLE_ENDIAN

# if SIZEOF_LONG == 4

p[0] = (STRINGLIB_CHAR)(block & 0xFFFFu);

p[1] = (STRINGLIB_CHAR)(block >> 16);

# elif SIZEOF_LONG == 8

p[0] = (STRINGLIB_CHAR)(block & 0xFFFFu);

p[1] = (STRINGLIB_CHAR)((block >> 16) & 0xFFFFu);

p[2] = (STRINGLIB_CHAR)((block >> 32) & 0xFFFFu);

p[3] = (STRINGLIB_CHAR)(block >> 48);

# endif

#else

# if SIZEOF_LONG == 4

p[0] = (STRINGLIB_CHAR)(block >> 16);

p[1] = (STRINGLIB_CHAR)(block & 0xFFFFu);

# elif SIZEOF_LONG == 8

p[0] = (STRINGLIB_CHAR)(block >> 48);

p[1] = (STRINGLIB_CHAR)((block >> 32) & 0xFFFFu);

p[2] = (STRINGLIB_CHAR)((block >> 16) & 0xFFFFu);

p[3] = (STRINGLIB_CHAR)(block & 0xFFFFu);

# endif

#endif

_q += SIZEOF_LONG;

p += SIZEOF_LONG / 2;

}

q = _q;

if (q >= e)

break;

}

ch = (q[ihi] << 8) | q[ilo];

q += 2;

if (!Py_UNICODE_IS_SURROGATE(ch)) {

#if STRINGLIB_SIZEOF_CHAR < 2

if (ch > STRINGLIB_MAX_CHAR)

/* Out-of-range */

goto Return;

#endif

*p++ = (STRINGLIB_CHAR)ch;

continue;

}

/* UTF-16 code pair: */

if (!Py_UNICODE_IS_HIGH_SURROGATE(ch))

goto IllegalEncoding;

if (q >= e)

goto UnexpectedEnd;

ch2 = (q[ihi] << 8) | q[ilo];

q += 2;

if (!Py_UNICODE_IS_LOW_SURROGATE(ch2))

goto IllegalSurrogate;

ch = Py_UNICODE_JOIN_SURROGATES(ch, ch2);

#if STRINGLIB_SIZEOF_CHAR < 4

/* Out-of-range */

goto Return;

#else

*p++ = (STRINGLIB_CHAR)ch;

#endif

}

ch = 0;

Return:

*inptr = q;

*outpos = p - dest;

return ch;

UnexpectedEnd:

ch = 1;

goto Return;

IllegalEncoding:

ch = 2;

goto Return;

IllegalSurrogate:

ch = 3;

goto Return;

}

#undef UCS2_REPEAT_MASK

#undef FAST_CHAR_MASK

#undef STRIPPED_MASK

#undef SWAB

#if STRINGLIB_MAX_CHAR >= 0x80

Py_LOCAL_INLINE(Py_ssize_t)

STRINGLIB(utf16_encode)(const STRINGLIB_CHAR *in,

Py_ssize_t len,

unsigned short **outptr,

int native_ordering)

{

unsigned short *out = *outptr;

const STRINGLIB_CHAR *end = in + len;

#if STRINGLIB_SIZEOF_CHAR == 1

if (native_ordering) {

const STRINGLIB_CHAR *unrolled_end = in + _Py_SIZE_ROUND_DOWN(len, 4);

while (in < unrolled_end) {

out[0] = in[0];

out[1] = in[1];

out[2] = in[2];

out[3] = in[3];

in += 4; out += 4;

}

while (in < end) {

*out++ = *in++;

}

} else {

# define SWAB2(CH) ((CH) << 8) /* high byte is zero */

const STRINGLIB_CHAR *unrolled_end = in + _Py_SIZE_ROUND_DOWN(len, 4);

while (in < unrolled_end) {

out[0] = SWAB2(in[0]);

out[1] = SWAB2(in[1]);

out[2] = SWAB2(in[2]);

out[3] = SWAB2(in[3]);

in += 4; out += 4;

}

while (in < end) {

Py_UCS4 ch = *in++;

*out++ = SWAB2((Py_UCS2)ch);

}

#undef SWAB2

}

*outptr = out;

return len;

#else

if (native_ordering) {

#if STRINGLIB_MAX_CHAR < 0x10000

const STRINGLIB_CHAR *unrolled_end = in + _Py_SIZE_ROUND_DOWN(len, 4);

while (in < unrolled_end) {

/* check if any character is a surrogate character */

if (((in[0] ^ 0xd800) &

(in[1] ^ 0xd800) &

(in[2] ^ 0xd800) &

(in[3] ^ 0xd800) & 0xf800) == 0)

break;

out[0] = in[0];

out[1] = in[1];

out[2] = in[2];

out[3] = in[3];

in += 4; out += 4;

}

#endif

while (in < end) {

Py_UCS4 ch;

ch = *in++;

if (ch < 0xd800)

*out++ = ch;

else if (ch < 0xe000)

/* reject surrogate characters (U+D800-U+DFFF) */

goto fail;

#if STRINGLIB_MAX_CHAR >= 0x10000

else if (ch >= 0x10000) {

out[0] = Py_UNICODE_HIGH_SURROGATE(ch);

out[1] = Py_UNICODE_LOW_SURROGATE(ch);

out += 2;

}

#endif

else

*out++ = ch;

}

} else {

#define SWAB2(CH) (((CH) << 8) | ((CH) >> 8))

#if STRINGLIB_MAX_CHAR < 0x10000

const STRINGLIB_CHAR *unrolled_end = in + _Py_SIZE_ROUND_DOWN(len, 4);

while (in < unrolled_end) {

/* check if any character is a surrogate character */

if (((in[0] ^ 0xd800) &

(in[1] ^ 0xd800) &

(in[2] ^ 0xd800) &

(in[3] ^ 0xd800) & 0xf800) == 0)

break;

out[0] = SWAB2(in[0]);

out[1] = SWAB2(in[1]);

out[2] = SWAB2(in[2]);

out[3] = SWAB2(in[3]);

in += 4; out += 4;

}

#endif

while (in < end) {

Py_UCS4 ch = *in++;

if (ch < 0xd800)

*out++ = SWAB2((Py_UCS2)ch);

else if (ch < 0xe000)

/* reject surrogate characters (U+D800-U+DFFF) */

goto fail;

#if STRINGLIB_MAX_CHAR >= 0x10000

else if (ch >= 0x10000) {

Py_UCS2 ch1 = Py_UNICODE_HIGH_SURROGATE(ch);

Py_UCS2 ch2 = Py_UNICODE_LOW_SURROGATE(ch);

out[0] = SWAB2(ch1);

out[1] = SWAB2(ch2);

out += 2;

}

#endif

else

*out++ = SWAB2((Py_UCS2)ch);

}

#undef SWAB2

}

*outptr = out;

return len;

fail:

*outptr = out;

return len - (end - in + 1);

#endif

}

static inline uint32_t

STRINGLIB(SWAB4)(STRINGLIB_CHAR ch)

{

uint32_t word = ch;

#if STRINGLIB_SIZEOF_CHAR == 1

/* high bytes are zero */

return (word << 24);

#elif STRINGLIB_SIZEOF_CHAR == 2

/* high bytes are zero */

return ((word & 0x00FFu) << 24) | ((word & 0xFF00u) << 8);

#else

return _Py_bswap32(word);

#endif

}

Py_LOCAL_INLINE(Py_ssize_t)

STRINGLIB(utf32_encode)(const STRINGLIB_CHAR *in,

Py_ssize_t len,

uint32_t **outptr,

int native_ordering)

{

uint32_t *out = *outptr;

const STRINGLIB_CHAR *end = in + len;

if (native_ordering) {

const STRINGLIB_CHAR *unrolled_end = in + _Py_SIZE_ROUND_DOWN(len, 4);

while (in < unrolled_end) {

#if STRINGLIB_SIZEOF_CHAR > 1

/* check if any character is a surrogate character */

if (((in[0] ^ 0xd800) &

(in[1] ^ 0xd800) &

(in[2] ^ 0xd800) &

(in[3] ^ 0xd800) & 0xf800) == 0)

break;

#endif

out[0] = in[0];

out[1] = in[1];

out[2] = in[2];

out[3] = in[3];

in += 4; out += 4;

}

while (in < end) {

Py_UCS4 ch;

ch = *in++;

#if STRINGLIB_SIZEOF_CHAR > 1

if (Py_UNICODE_IS_SURROGATE(ch)) {

/* reject surrogate characters (U+D800-U+DFFF) */

goto fail;

}

#endif

*out++ = ch;

}

} else {

const STRINGLIB_CHAR *unrolled_end = in + _Py_SIZE_ROUND_DOWN(len, 4);

while (in < unrolled_end) {

#if STRINGLIB_SIZEOF_CHAR > 1

/* check if any character is a surrogate character */

if (((in[0] ^ 0xd800) &

(in[1] ^ 0xd800) &

(in[2] ^ 0xd800) &

(in[3] ^ 0xd800) & 0xf800) == 0)

break;

#endif

out[0] = STRINGLIB(SWAB4)(in[0]);

out[1] = STRINGLIB(SWAB4)(in[1]);

out[2] = STRINGLIB(SWAB4)(in[2]);

out[3] = STRINGLIB(SWAB4)(in[3]);

in += 4; out += 4;

}

while (in < end) {

Py_UCS4 ch = *in++;

#if STRINGLIB_SIZEOF_CHAR > 1

if (Py_UNICODE_IS_SURROGATE(ch)) {

/* reject surrogate characters (U+D800-U+DFFF) */

goto fail;

}

#endif

*out++ = STRINGLIB(SWAB4)(ch);

}

*outptr = out;

return len;

#if STRINGLIB_SIZEOF_CHAR > 1

fail:

*outptr = out;

return len - (end - in + 1);

#endif

}

#endif

cpython/Objects/stringlib/codecs.h at print-statement · python-emscripten/cpython · GitHub

Repository navigation

Expand file tree

Breadcrumbs

codecs.h

Latest commit

History

Breadcrumbs

codecs.h

File metadata and controls