cpython/Python/codecs.c at threading.Timer-context-manager · Ginkss/cpython · GitHub

History

1543 lines (1392 loc) · 46 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

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

826

827

828

829

830

831

832

833

834

835

836

837

838

839

840

841

842

843

844

845

846

847

848

849

850

851

852

853

854

855

856

857

858

859

860

861

862

863

864

865

866

867

868

869

870

871

872

873

874

875

876

877

878

879

880

881

882

883

884

885

886

887

888

889

890

891

892

893

894

895

896

897

898

899

900

901

902

903

904

905

906

907

908

909

910

911

912

913

914

915

916

917

918

919

920

921

922

923

924

925

926

927

928

929

930

931

932

933

934

935

936

937

938

939

940

941

942

943

944

945

946

947

948

949

950

951

952

953

954

955

956

957

958

959

960

961

962

963

964

965

966

967

968

969

970

971

972

973

974

975

976

977

978

979

980

981

982

983

984

985

986

987

988

989

990

991

992

993

994

995

996

997

998

999

1000

/* ------------------------------------------------------------------------

Python Codec Registry and support functions

Written by Marc-Andre Lemburg (mal@lemburg.com).

------------------------------------------------------------------------ */

#include "Python.h"

#include "pycore_call.h" // _PyObject_CallNoArgs()

#include "pycore_interp.h" // PyInterpreterState.codec_search_path

#include "pycore_lock.h" // PyMutex

#include "pycore_pyerrors.h" // _PyErr_FormatNote()

#include "pycore_pystate.h" // _PyInterpreterState_GET()

#include "pycore_ucnhash.h" // _PyUnicode_Name_CAPI

static const char *codecs_builtin_error_handlers[] = {

"strict", "ignore", "replace",

"xmlcharrefreplace", "backslashreplace", "namereplace",

"surrogatepass", "surrogateescape",

};

const char *Py_hexdigits = "0123456789abcdef";

/* --- Codec Registry ----------------------------------------------------- */

int PyCodec_Register(PyObject *search_function)

{

PyInterpreterState *interp = _PyInterpreterState_GET();

assert(interp->codecs.initialized);

if (search_function == NULL) {

PyErr_BadArgument();

goto onError;

}

if (!PyCallable_Check(search_function)) {

PyErr_SetString(PyExc_TypeError, "argument must be callable");

goto onError;

}

#ifdef Py_GIL_DISABLED

PyMutex_Lock(&interp->codecs.search_path_mutex);

#endif

int ret = PyList_Append(interp->codecs.search_path, search_function);

#ifdef Py_GIL_DISABLED

PyMutex_Unlock(&interp->codecs.search_path_mutex);

#endif

return ret;

onError:

return -1;

}

int

PyCodec_Unregister(PyObject *search_function)

{

PyInterpreterState *interp = _PyInterpreterState_GET();

if (interp->codecs.initialized != 1) {

/* Do nothing if codecs state was cleared (only possible during

interpreter shutdown). */

return 0;

}

PyObject *codec_search_path = interp->codecs.search_path;

assert(PyList_CheckExact(codec_search_path));

for (Py_ssize_t i = 0; i < PyList_GET_SIZE(codec_search_path); i++) {

#ifdef Py_GIL_DISABLED

PyMutex_Lock(&interp->codecs.search_path_mutex);

#endif

PyObject *item = PyList_GetItemRef(codec_search_path, i);

int ret = 1;

if (item == search_function) {

// We hold a reference to the item, so its destructor can't run

// while we hold search_path_mutex.

ret = PyList_SetSlice(codec_search_path, i, i+1, NULL);

}

#ifdef Py_GIL_DISABLED

PyMutex_Unlock(&interp->codecs.search_path_mutex);

#endif

Py_DECREF(item);

if (ret != 1) {

assert(interp->codecs.search_cache != NULL);

assert(PyDict_CheckExact(interp->codecs.search_cache));

PyDict_Clear(interp->codecs.search_cache);

return ret;

}

return 0;

}

extern int _Py_normalize_encoding(const char *, char *, size_t);

/* Convert a string to a normalized Python string(decoded from UTF-8): all characters are

converted to lower case, spaces and hyphens are replaced with underscores. */

static

PyObject *normalizestring(const char *string)

{

size_t len = strlen(string);

char *encoding;

PyObject *v;

if (len > PY_SSIZE_T_MAX) {

PyErr_SetString(PyExc_OverflowError, "string is too large");

return NULL;

}

encoding = PyMem_Malloc(len + 1);

if (encoding == NULL)

return PyErr_NoMemory();

if (!_Py_normalize_encoding(string, encoding, len + 1))

{

PyErr_SetString(PyExc_RuntimeError, "_Py_normalize_encoding() failed");

PyMem_Free(encoding);

return NULL;

}

v = PyUnicode_FromString(encoding);

PyMem_Free(encoding);

return v;

}

/* Lookup the given encoding and return a tuple providing the codec

facilities.

The encoding string is looked up converted to all lower-case

characters. This makes encodings looked up through this mechanism

effectively case-insensitive.

If no codec is found, a LookupError is set and NULL returned.

As side effect, this tries to load the encodings package, if not

yet done. This is part of the lazy load strategy for the encodings

package.

PyObject *_PyCodec_Lookup(const char *encoding)

{

if (encoding == NULL) {

PyErr_BadArgument();

return NULL;

}

PyInterpreterState *interp = _PyInterpreterState_GET();

assert(interp->codecs.initialized);

/* Convert the encoding to a normalized Python string: all

characters are converted to lower case, spaces and hyphens are

replaced with underscores. */

PyObject *v = normalizestring(encoding);

if (v == NULL) {

return NULL;

}

/* Intern the string. We'll make it immortal later if lookup succeeds. */

_PyUnicode_InternMortal(interp, &v);

/* First, try to lookup the name in the registry dictionary */

PyObject *result;

if (PyDict_GetItemRef(interp->codecs.search_cache, v, &result) < 0) {

goto onError;

}

if (result != NULL) {

Py_DECREF(v);

return result;

}

/* Next, scan the search functions in order of registration */

const Py_ssize_t len = PyList_Size(interp->codecs.search_path);

if (len < 0)

goto onError;

if (len == 0) {

PyErr_SetString(PyExc_LookupError,

"no codec search functions registered: "

"can't find encoding");

goto onError;

}

Py_ssize_t i;

for (i = 0; i < len; i++) {

PyObject *func;

func = PyList_GetItemRef(interp->codecs.search_path, i);

if (func == NULL)

goto onError;

result = PyObject_CallOneArg(func, v);

Py_DECREF(func);

if (result == NULL)

goto onError;

if (result == Py_None) {

Py_CLEAR(result);

continue;

}

if (!PyTuple_Check(result) || PyTuple_GET_SIZE(result) != 4) {

PyErr_SetString(PyExc_TypeError,

"codec search functions must return 4-tuples");

Py_DECREF(result);

goto onError;

}

break;

}

if (result == NULL) {

/* XXX Perhaps we should cache misses too ? */

PyErr_Format(PyExc_LookupError,

"unknown encoding: %s", encoding);

goto onError;

}

_PyUnicode_InternImmortal(interp, &v);

/* Cache and return the result */

if (PyDict_SetItem(interp->codecs.search_cache, v, result) < 0) {

Py_DECREF(result);

goto onError;

}

Py_DECREF(v);

return result;

onError:

Py_DECREF(v);

return NULL;

}

/* Codec registry encoding check API. */

int PyCodec_KnownEncoding(const char *encoding)

{

PyObject *codecs;

codecs = _PyCodec_Lookup(encoding);

if (!codecs) {

PyErr_Clear();

return 0;

}

else {

Py_DECREF(codecs);

return 1;

}

static

PyObject *args_tuple(PyObject *object,

const char *errors)

{

PyObject *args;

args = PyTuple_New(1 + (errors != NULL));

if (args == NULL)

return NULL;

PyTuple_SET_ITEM(args, 0, Py_NewRef(object));

if (errors) {

PyObject *v;

v = PyUnicode_FromString(errors);

if (v == NULL) {

Py_DECREF(args);

return NULL;

}

PyTuple_SET_ITEM(args, 1, v);

}

return args;

}

/* Helper function to get a codec item */

static

PyObject *codec_getitem(const char *encoding, int index)

{

PyObject *codecs;

PyObject *v;

codecs = _PyCodec_Lookup(encoding);

if (codecs == NULL)

return NULL;

v = PyTuple_GET_ITEM(codecs, index);

Py_DECREF(codecs);

return Py_NewRef(v);

}

/* Helper functions to create an incremental codec. */

static

PyObject *codec_makeincrementalcodec(PyObject *codec_info,

const char *errors,

const char *attrname)

{

PyObject *ret, *inccodec;

inccodec = PyObject_GetAttrString(codec_info, attrname);

if (inccodec == NULL)

return NULL;

if (errors)

ret = PyObject_CallFunction(inccodec, "s", errors);

else

ret = _PyObject_CallNoArgs(inccodec);

Py_DECREF(inccodec);

return ret;

}

static

PyObject *codec_getincrementalcodec(const char *encoding,

const char *errors,

const char *attrname)

{

PyObject *codec_info, *ret;

codec_info = _PyCodec_Lookup(encoding);

if (codec_info == NULL)

return NULL;

ret = codec_makeincrementalcodec(codec_info, errors, attrname);

Py_DECREF(codec_info);

return ret;

}

/* Helper function to create a stream codec. */

static

PyObject *codec_getstreamcodec(const char *encoding,

PyObject *stream,

const char *errors,

const int index)

{

PyObject *codecs, *streamcodec, *codeccls;

codecs = _PyCodec_Lookup(encoding);

if (codecs == NULL)

return NULL;

codeccls = PyTuple_GET_ITEM(codecs, index);

if (errors != NULL)

streamcodec = PyObject_CallFunction(codeccls, "Os", stream, errors);

else

streamcodec = PyObject_CallOneArg(codeccls, stream);

Py_DECREF(codecs);

return streamcodec;

}

/* Helpers to work with the result of _PyCodec_Lookup

PyObject *_PyCodecInfo_GetIncrementalDecoder(PyObject *codec_info,

const char *errors)

{

return codec_makeincrementalcodec(codec_info, errors,

"incrementaldecoder");

}

PyObject *_PyCodecInfo_GetIncrementalEncoder(PyObject *codec_info,

const char *errors)

{

return codec_makeincrementalcodec(codec_info, errors,

"incrementalencoder");

}

/* Convenience APIs to query the Codec registry.

All APIs return a codec object with incremented refcount.

PyObject *PyCodec_Encoder(const char *encoding)

{

return codec_getitem(encoding, 0);

}

PyObject *PyCodec_Decoder(const char *encoding)

{

return codec_getitem(encoding, 1);

}

PyObject *PyCodec_IncrementalEncoder(const char *encoding,

const char *errors)

{

return codec_getincrementalcodec(encoding, errors, "incrementalencoder");

}

PyObject *PyCodec_IncrementalDecoder(const char *encoding,

const char *errors)

{

return codec_getincrementalcodec(encoding, errors, "incrementaldecoder");

}

PyObject *PyCodec_StreamReader(const char *encoding,

PyObject *stream,

const char *errors)

{

return codec_getstreamcodec(encoding, stream, errors, 2);

}

PyObject *PyCodec_StreamWriter(const char *encoding,

PyObject *stream,

const char *errors)

{

return codec_getstreamcodec(encoding, stream, errors, 3);

}

/* Encode an object (e.g. a Unicode object) using the given encoding

and return the resulting encoded object (usually a Python string).

errors is passed to the encoder factory as argument if non-NULL. */

static PyObject *

_PyCodec_EncodeInternal(PyObject *object,

PyObject *encoder,

const char *encoding,

const char *errors)

{

PyObject *args = NULL, *result = NULL;

PyObject *v = NULL;

args = args_tuple(object, errors);

if (args == NULL)

goto onError;

result = PyObject_Call(encoder, args, NULL);

if (result == NULL) {

_PyErr_FormatNote("%s with '%s' codec failed", "encoding", encoding);

goto onError;

}

if (!PyTuple_Check(result) ||

PyTuple_GET_SIZE(result) != 2) {

PyErr_SetString(PyExc_TypeError,

"encoder must return a tuple (object, integer)");

goto onError;

}

v = Py_NewRef(PyTuple_GET_ITEM(result,0));

/* We don't check or use the second (integer) entry. */

Py_DECREF(args);

Py_DECREF(encoder);

Py_DECREF(result);

return v;

onError:

Py_XDECREF(result);

Py_XDECREF(args);

Py_XDECREF(encoder);

return NULL;

}

/* Decode an object (usually a Python string) using the given encoding

and return an equivalent object (e.g. a Unicode object).

errors is passed to the decoder factory as argument if non-NULL. */

static PyObject *

_PyCodec_DecodeInternal(PyObject *object,

PyObject *decoder,

const char *encoding,

const char *errors)

{

PyObject *args = NULL, *result = NULL;

PyObject *v;

args = args_tuple(object, errors);

if (args == NULL)

goto onError;

result = PyObject_Call(decoder, args, NULL);

if (result == NULL) {

_PyErr_FormatNote("%s with '%s' codec failed", "decoding", encoding);

goto onError;

}

if (!PyTuple_Check(result) ||

PyTuple_GET_SIZE(result) != 2) {

PyErr_SetString(PyExc_TypeError,

"decoder must return a tuple (object,integer)");

goto onError;

}

v = Py_NewRef(PyTuple_GET_ITEM(result,0));

/* We don't check or use the second (integer) entry. */

Py_DECREF(args);

Py_DECREF(decoder);

Py_DECREF(result);

return v;

onError:

Py_XDECREF(args);

Py_XDECREF(decoder);

Py_XDECREF(result);

return NULL;

}

/* Generic encoding/decoding API */

PyObject *PyCodec_Encode(PyObject *object,

const char *encoding,

const char *errors)

{

PyObject *encoder;

encoder = PyCodec_Encoder(encoding);

if (encoder == NULL)

return NULL;

return _PyCodec_EncodeInternal(object, encoder, encoding, errors);

}

PyObject *PyCodec_Decode(PyObject *object,

const char *encoding,

const char *errors)

{

PyObject *decoder;

decoder = PyCodec_Decoder(encoding);

if (decoder == NULL)

return NULL;

return _PyCodec_DecodeInternal(object, decoder, encoding, errors);

}

/* Text encoding/decoding API */

PyObject * _PyCodec_LookupTextEncoding(const char *encoding,

const char *alternate_command)

{

PyObject *codec;

PyObject *attr;

int is_text_codec;

codec = _PyCodec_Lookup(encoding);

if (codec == NULL)

return NULL;

/* Backwards compatibility: assume any raw tuple describes a text

* encoding, and the same for anything lacking the private

* attribute.

if (!PyTuple_CheckExact(codec)) {

if (PyObject_GetOptionalAttr(codec, &_Py_ID(_is_text_encoding), &attr) < 0) {

Py_DECREF(codec);

return NULL;

}

if (attr != NULL) {

is_text_codec = PyObject_IsTrue(attr);

Py_DECREF(attr);

if (is_text_codec <= 0) {

Py_DECREF(codec);

if (!is_text_codec)

PyErr_Format(PyExc_LookupError,

"'%.400s' is not a text encoding; "

"use %s to handle arbitrary codecs",

encoding, alternate_command);

return NULL;

}

/* This appears to be a valid text encoding */

return codec;

}

static

PyObject *codec_getitem_checked(const char *encoding,

const char *alternate_command,

int index)

{

PyObject *codec;

PyObject *v;

codec = _PyCodec_LookupTextEncoding(encoding, alternate_command);

if (codec == NULL)

return NULL;

v = Py_NewRef(PyTuple_GET_ITEM(codec, index));

Py_DECREF(codec);

return v;

}

static PyObject * _PyCodec_TextEncoder(const char *encoding)

{

return codec_getitem_checked(encoding, "codecs.encode()", 0);

}

static PyObject * _PyCodec_TextDecoder(const char *encoding)

{

return codec_getitem_checked(encoding, "codecs.decode()", 1);

}

PyObject *_PyCodec_EncodeText(PyObject *object,

const char *encoding,

const char *errors)

{

PyObject *encoder;

encoder = _PyCodec_TextEncoder(encoding);

if (encoder == NULL)

return NULL;

return _PyCodec_EncodeInternal(object, encoder, encoding, errors);

}

PyObject *_PyCodec_DecodeText(PyObject *object,

const char *encoding,

const char *errors)

{

PyObject *decoder;

decoder = _PyCodec_TextDecoder(encoding);

if (decoder == NULL)

return NULL;

return _PyCodec_DecodeInternal(object, decoder, encoding, errors);

}

/* Register the error handling callback function error under the name

name. This function will be called by the codec when it encounters

an unencodable characters/undecodable bytes and doesn't know the

callback name, when name is specified as the error parameter

in the call to the encode/decode function.

Return 0 on success, -1 on error */

int PyCodec_RegisterError(const char *name, PyObject *error)

{

PyInterpreterState *interp = _PyInterpreterState_GET();

assert(interp->codecs.initialized);

if (!PyCallable_Check(error)) {

PyErr_SetString(PyExc_TypeError, "handler must be callable");

return -1;

}

return PyDict_SetItemString(interp->codecs.error_registry,

name, error);

}

int _PyCodec_UnregisterError(const char *name)

{

for (size_t i = 0; i < Py_ARRAY_LENGTH(codecs_builtin_error_handlers); ++i) {

if (strcmp(name, codecs_builtin_error_handlers[i]) == 0) {

PyErr_Format(PyExc_ValueError,

"cannot un-register built-in error handler '%s'", name);

return -1;

}

PyInterpreterState *interp = _PyInterpreterState_GET();

assert(interp->codecs.initialized);

return PyDict_PopString(interp->codecs.error_registry, name, NULL);

}

/* Lookup the error handling callback function registered under the

name error. As a special case NULL can be passed, in which case

the error handling callback for strict encoding will be returned. */

PyObject *PyCodec_LookupError(const char *name)

{

PyInterpreterState *interp = _PyInterpreterState_GET();

assert(interp->codecs.initialized);

if (name==NULL)

name = "strict";

PyObject *handler;

if (PyDict_GetItemStringRef(interp->codecs.error_registry, name, &handler) < 0) {

return NULL;

}

if (handler == NULL) {

PyErr_Format(PyExc_LookupError, "unknown error handler name '%.400s'", name);

return NULL;

}

return handler;

}

static void wrong_exception_type(PyObject *exc)

{

PyErr_Format(PyExc_TypeError,

"don't know how to handle %.200s in error callback",

Py_TYPE(exc)->tp_name);

}

PyObject *PyCodec_StrictErrors(PyObject *exc)

{

if (PyExceptionInstance_Check(exc))

PyErr_SetObject(PyExceptionInstance_Class(exc), exc);

else

PyErr_SetString(PyExc_TypeError, "codec must pass exception instance");

return NULL;

}

PyObject *PyCodec_IgnoreErrors(PyObject *exc)

{

Py_ssize_t end;

if (PyObject_TypeCheck(exc, (PyTypeObject *)PyExc_UnicodeEncodeError)) {

if (PyUnicodeEncodeError_GetEnd(exc, &end))

return NULL;

}

else if (PyObject_TypeCheck(exc, (PyTypeObject *)PyExc_UnicodeDecodeError)) {

if (PyUnicodeDecodeError_GetEnd(exc, &end))

return NULL;

}

else if (PyObject_TypeCheck(exc, (PyTypeObject *)PyExc_UnicodeTranslateError)) {

if (PyUnicodeTranslateError_GetEnd(exc, &end))

return NULL;

}

else {

wrong_exception_type(exc);

return NULL;

}

return Py_BuildValue("(Nn)", Py_GetConstant(Py_CONSTANT_EMPTY_STR), end);

}

PyObject *PyCodec_ReplaceErrors(PyObject *exc)

{

Py_ssize_t start, end, i, len;

if (PyObject_TypeCheck(exc, (PyTypeObject *)PyExc_UnicodeEncodeError)) {

PyObject *res;

Py_UCS1 *outp;

if (PyUnicodeEncodeError_GetStart(exc, &start))

return NULL;

if (PyUnicodeEncodeError_GetEnd(exc, &end))

return NULL;

len = end - start;

res = PyUnicode_New(len, '?');

if (res == NULL)

return NULL;

assert(PyUnicode_KIND(res) == PyUnicode_1BYTE_KIND);

outp = PyUnicode_1BYTE_DATA(res);

for (i = 0; i < len; ++i)

outp[i] = '?';

assert(_PyUnicode_CheckConsistency(res, 1));

return Py_BuildValue("(Nn)", res, end);

}

else if (PyObject_TypeCheck(exc, (PyTypeObject *)PyExc_UnicodeDecodeError)) {

if (PyUnicodeDecodeError_GetEnd(exc, &end))

return NULL;

return Py_BuildValue("(Cn)",

(int)Py_UNICODE_REPLACEMENT_CHARACTER,

end);

}

else if (PyObject_TypeCheck(exc, (PyTypeObject *)PyExc_UnicodeTranslateError)) {

PyObject *res;

Py_UCS2 *outp;

if (PyUnicodeTranslateError_GetStart(exc, &start))

return NULL;

if (PyUnicodeTranslateError_GetEnd(exc, &end))

return NULL;

len = end - start;

res = PyUnicode_New(len, Py_UNICODE_REPLACEMENT_CHARACTER);

if (res == NULL)

return NULL;

assert(PyUnicode_KIND(res) == PyUnicode_2BYTE_KIND);

outp = PyUnicode_2BYTE_DATA(res);

for (i = 0; i < len; i++)

outp[i] = Py_UNICODE_REPLACEMENT_CHARACTER;

assert(_PyUnicode_CheckConsistency(res, 1));

return Py_BuildValue("(Nn)", res, end);

}

else {

wrong_exception_type(exc);

return NULL;

}

PyObject *PyCodec_XMLCharRefReplaceErrors(PyObject *exc)

{

if (PyObject_TypeCheck(exc, (PyTypeObject *)PyExc_UnicodeEncodeError)) {

PyObject *restuple;

PyObject *object;

Py_ssize_t i;

Py_ssize_t start;

Py_ssize_t end;

PyObject *res;

Py_UCS1 *outp;

Py_ssize_t ressize;

Py_UCS4 ch;

if (PyUnicodeEncodeError_GetStart(exc, &start))

return NULL;

if (PyUnicodeEncodeError_GetEnd(exc, &end))

return NULL;

if (!(object = PyUnicodeEncodeError_GetObject(exc)))

return NULL;

if (end - start > PY_SSIZE_T_MAX / (2+7+1))

end = start + PY_SSIZE_T_MAX / (2+7+1);

for (i = start, ressize = 0; i < end; ++i) {

/* object is guaranteed to be "ready" */

ch = PyUnicode_READ_CHAR(object, i);

if (ch<10)

ressize += 2+1+1;

else if (ch<100)

ressize += 2+2+1;

else if (ch<1000)

ressize += 2+3+1;

else if (ch<10000)

ressize += 2+4+1;

else if (ch<100000)

ressize += 2+5+1;

else if (ch<1000000)

ressize += 2+6+1;

else

ressize += 2+7+1;

}

/* allocate replacement */

res = PyUnicode_New(ressize, 127);

if (res == NULL) {

Py_DECREF(object);

return NULL;

}

outp = PyUnicode_1BYTE_DATA(res);

/* generate replacement */

for (i = start; i < end; ++i) {

int digits;

int base;

ch = PyUnicode_READ_CHAR(object, i);

*outp++ = '&';

*outp++ = '#';

if (ch<10) {

digits = 1;

base = 1;

}

else if (ch<100) {

digits = 2;

base = 10;

}

else if (ch<1000) {

digits = 3;

base = 100;

}

else if (ch<10000) {

digits = 4;

base = 1000;

}

else if (ch<100000) {

digits = 5;

base = 10000;

}

else if (ch<1000000) {

digits = 6;

base = 100000;

}

else {

digits = 7;

base = 1000000;

}

while (digits-->0) {

*outp++ = '0' + ch/base;

ch %= base;

base /= 10;

}

*outp++ = ';';

}

assert(_PyUnicode_CheckConsistency(res, 1));

restuple = Py_BuildValue("(Nn)", res, end);

Py_DECREF(object);

return restuple;

}

else {

wrong_exception_type(exc);

return NULL;

}

PyObject *PyCodec_BackslashReplaceErrors(PyObject *exc)

{

PyObject *object;

Py_ssize_t i;

Py_ssize_t start;

Py_ssize_t end;

PyObject *res;

Py_UCS1 *outp;

int ressize;

Py_UCS4 c;

if (PyObject_TypeCheck(exc, (PyTypeObject *)PyExc_UnicodeDecodeError)) {

const unsigned char *p;

if (PyUnicodeDecodeError_GetStart(exc, &start))

return NULL;

if (PyUnicodeDecodeError_GetEnd(exc, &end))

return NULL;

if (!(object = PyUnicodeDecodeError_GetObject(exc)))

return NULL;

p = (const unsigned char*)PyBytes_AS_STRING(object);

res = PyUnicode_New(4 * (end - start), 127);

if (res == NULL) {

Py_DECREF(object);

return NULL;

}

outp = PyUnicode_1BYTE_DATA(res);

for (i = start; i < end; i++, outp += 4) {

unsigned char c = p[i];

outp[0] = '\\';

outp[1] = 'x';

outp[2] = Py_hexdigits[(c>>4)&0xf];

outp[3] = Py_hexdigits[c&0xf];

}

assert(_PyUnicode_CheckConsistency(res, 1));

Py_DECREF(object);

return Py_BuildValue("(Nn)", res, end);

}

if (PyObject_TypeCheck(exc, (PyTypeObject *)PyExc_UnicodeEncodeError)) {

if (PyUnicodeEncodeError_GetStart(exc, &start))

return NULL;

if (PyUnicodeEncodeError_GetEnd(exc, &end))

return NULL;

if (!(object = PyUnicodeEncodeError_GetObject(exc)))

return NULL;

}

else if (PyObject_TypeCheck(exc, (PyTypeObject *)PyExc_UnicodeTranslateError)) {

if (PyUnicodeTranslateError_GetStart(exc, &start))

return NULL;

if (PyUnicodeTranslateError_GetEnd(exc, &end))

return NULL;

if (!(object = PyUnicodeTranslateError_GetObject(exc)))

return NULL;

}

else {

wrong_exception_type(exc);

return NULL;

}

if (end - start > PY_SSIZE_T_MAX / (1+1+8))

end = start + PY_SSIZE_T_MAX / (1+1+8);

for (i = start, ressize = 0; i < end; ++i) {

/* object is guaranteed to be "ready" */

c = PyUnicode_READ_CHAR(object, i);

if (c >= 0x10000) {

ressize += 1+1+8;

}

else if (c >= 0x100) {

ressize += 1+1+4;

}

else

ressize += 1+1+2;

}

res = PyUnicode_New(ressize, 127);

if (res == NULL) {

Py_DECREF(object);

return NULL;

}

outp = PyUnicode_1BYTE_DATA(res);

for (i = start; i < end; ++i) {

c = PyUnicode_READ_CHAR(object, i);

*outp++ = '\\';

if (c >= 0x00010000) {

*outp++ = 'U';

*outp++ = Py_hexdigits[(c>>28)&0xf];

*outp++ = Py_hexdigits[(c>>24)&0xf];

*outp++ = Py_hexdigits[(c>>20)&0xf];

*outp++ = Py_hexdigits[(c>>16)&0xf];

*outp++ = Py_hexdigits[(c>>12)&0xf];

*outp++ = Py_hexdigits[(c>>8)&0xf];

}

else if (c >= 0x100) {

*outp++ = 'u';

*outp++ = Py_hexdigits[(c>>12)&0xf];

*outp++ = Py_hexdigits[(c>>8)&0xf];

}

else

*outp++ = 'x';

*outp++ = Py_hexdigits[(c>>4)&0xf];

*outp++ = Py_hexdigits[c&0xf];

}

assert(_PyUnicode_CheckConsistency(res, 1));

Py_DECREF(object);

return Py_BuildValue("(Nn)", res, end);

}

PyObject *PyCodec_NameReplaceErrors(PyObject *exc)

{

if (PyObject_TypeCheck(exc, (PyTypeObject *)PyExc_UnicodeEncodeError)) {

PyObject *restuple;

PyObject *object;

Py_ssize_t i;

Py_ssize_t start;

Py_ssize_t end;

PyObject *res;

Py_UCS1 *outp;

Py_ssize_t ressize;

int replsize;

Py_UCS4 c;

char buffer[256]; /* NAME_MAXLEN */

if (PyUnicodeEncodeError_GetStart(exc, &start))

return NULL;

if (PyUnicodeEncodeError_GetEnd(exc, &end))

return NULL;

if (!(object = PyUnicodeEncodeError_GetObject(exc)))

return NULL;

_PyUnicode_Name_CAPI *ucnhash_capi = _PyUnicode_GetNameCAPI();

if (ucnhash_capi == NULL) {

return NULL;

}

for (i = start, ressize = 0; i < end; ++i) {

/* object is guaranteed to be "ready" */

c = PyUnicode_READ_CHAR(object, i);

if (ucnhash_capi->getname(c, buffer, sizeof(buffer), 1)) {

replsize = 1+1+1+(int)strlen(buffer)+1;

}

else if (c >= 0x10000) {

replsize = 1+1+8;

}

else if (c >= 0x100) {

replsize = 1+1+4;

}

else

replsize = 1+1+2;

if (ressize > PY_SSIZE_T_MAX - replsize)

break;

View remainder of file in raw view

cpython/Python/codecs.c at threading.Timer-context-manager · Ginkss/cpython · GitHub

Expand file tree

Breadcrumbs

codecs.c

Latest commit

History

Breadcrumbs

codecs.c

File metadata and controls