cpython/Modules/_tkinter.c at 06e66108c6c71e1cc2b6a0c1d4cd8d245469632f · pythoncapi/cpython

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

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

/***********************************************************

******************************************************************/

/* _tkinter.c -- Interface to libtk.a and libtcl.a. */

/* TCL/TK VERSION INFO:

Only Tcl/Tk 8.4 and later are supported. Older versions are not

supported. Use Python 3.4 or older if you cannot upgrade your

Tcl/Tk libraries.

/* XXX Further speed-up ideas, involving Tcl 8.0 features:

- Register a new Tcl type, "Python callable", which can be called more

efficiently and passed to Tcl_EvalObj() directly (if this is possible).

#define PY_SSIZE_T_CLEAN

#include "Python.h"

#include <ctype.h>

#ifdef WITH_THREAD

#include "pythread.h"

#endif

#ifdef MS_WINDOWS

#include <windows.h>

#endif

#define CHECK_SIZE(size, elemsize) \

((size_t)(size) <= Py_MIN((size_t)INT_MAX, UINT_MAX / (size_t)(elemsize)))

/* If Tcl is compiled for threads, we must also define TCL_THREAD. We define

it always; if Tcl is not threaded, the thread functions in

Tcl are empty. */

#define TCL_THREADS

#ifdef TK_FRAMEWORK

#include <Tcl/tcl.h>

#include <Tk/tk.h>

#else

#include <tcl.h>

#include <tk.h>

#endif

#include "tkinter.h"

#if TK_VERSION_HEX < 0x08040002

#error "Tk older than 8.4 not supported"

#endif

#if TK_VERSION_HEX >= 0x08050000

#define HAVE_LIBTOMMAMTH

#include <tclTomMath.h>

#endif

#if !(defined(MS_WINDOWS) || defined(__CYGWIN__))

#define HAVE_CREATEFILEHANDLER

#endif

#ifdef HAVE_CREATEFILEHANDLER

/* This bit is to ensure that TCL_UNIX_FD is defined and doesn't interfere

with the proper calculation of FHANDLETYPE == TCL_UNIX_FD below. */

#ifndef TCL_UNIX_FD

# ifdef TCL_WIN_SOCKET

# define TCL_UNIX_FD (! TCL_WIN_SOCKET)

# else

# define TCL_UNIX_FD 1

# endif

#endif

/* Tcl_CreateFileHandler() changed several times; these macros deal with the

messiness. In Tcl 8.0 and later, it is not available on Windows (and on

Unix, only because Jack added it back); when available on Windows, it only

applies to sockets. */

#ifdef MS_WINDOWS

#define FHANDLETYPE TCL_WIN_SOCKET

#else

#define FHANDLETYPE TCL_UNIX_FD

#endif

/* If Tcl can wait for a Unix file descriptor, define the EventHook() routine

which uses this to handle Tcl events while the user is typing commands. */

#if FHANDLETYPE == TCL_UNIX_FD

#define WAIT_FOR_STDIN

#endif

#endif /* HAVE_CREATEFILEHANDLER */

#ifdef MS_WINDOWS

#include <conio.h>

#define WAIT_FOR_STDIN

#endif

#ifdef WITH_THREAD

/* The threading situation is complicated. Tcl is not thread-safe, except

when configured with --enable-threads.

So we need to use a lock around all uses of Tcl. Previously, the

Python interpreter lock was used for this. However, this causes

problems when other Python threads need to run while Tcl is blocked

waiting for events.

To solve this problem, a separate lock for Tcl is introduced.

Holding it is incompatible with holding Python's interpreter lock.

The following four macros manipulate both locks together.

ENTER_TCL and LEAVE_TCL are brackets, just like

Py_BEGIN_ALLOW_THREADS and Py_END_ALLOW_THREADS. They should be

used whenever a call into Tcl is made that could call an event

handler, or otherwise affect the state of a Tcl interpreter. These

assume that the surrounding code has the Python interpreter lock;

inside the brackets, the Python interpreter lock has been released

and the lock for Tcl has been acquired.

Sometimes, it is necessary to have both the Python lock and the Tcl

lock. (For example, when transferring data from the Tcl

interpreter result to a Python string object.) This can be done by

using different macros to close the ENTER_TCL block: ENTER_OVERLAP

reacquires the Python lock (and restores the thread state) but

doesn't release the Tcl lock; LEAVE_OVERLAP_TCL releases the Tcl

lock.

By contrast, ENTER_PYTHON and LEAVE_PYTHON are used in Tcl event

handlers when the handler needs to use Python. Such event handlers

are entered while the lock for Tcl is held; the event handler

presumably needs to use Python. ENTER_PYTHON releases the lock for

Tcl and acquires the Python interpreter lock, restoring the

appropriate thread state, and LEAVE_PYTHON releases the Python

interpreter lock and re-acquires the lock for Tcl. It is okay for

ENTER_TCL/LEAVE_TCL pairs to be contained inside the code between

ENTER_PYTHON and LEAVE_PYTHON.

These locks expand to several statements and brackets; they should

not be used in branches of if statements and the like.

If Tcl is threaded, this approach won't work anymore. The Tcl

interpreter is only valid in the thread that created it, and all Tk

activity must happen in this thread, also. That means that the

mainloop must be invoked in the thread that created the

interpreter. Invoking commands from other threads is possible;

_tkinter will queue an event for the interpreter thread, which will

then execute the command and pass back the result. If the main

thread is not in the mainloop, and invoking commands causes an

exception; if the main loop is running but not processing events,

the command invocation will block.

In addition, for a threaded Tcl, a single global tcl_tstate won't

be sufficient anymore, since multiple Tcl interpreters may

simultaneously dispatch in different threads. So we use the Tcl TLS

API.

static PyThread_type_lock tcl_lock = 0;

#ifdef TCL_THREADS

static Tcl_ThreadDataKey state_key;

typedef PyThreadState *ThreadSpecificData;

#define tcl_tstate \

(*(PyThreadState**)Tcl_GetThreadData(&state_key, sizeof(PyThreadState*)))

#else

static PyThreadState *tcl_tstate = NULL;

#endif

#define ENTER_TCL \

{ PyThreadState *tstate = PyThreadState_Get(); Py_BEGIN_ALLOW_THREADS \

if(tcl_lock)PyThread_acquire_lock(tcl_lock, 1); tcl_tstate = tstate;

#define LEAVE_TCL \

tcl_tstate = NULL; \

if(tcl_lock)PyThread_release_lock(tcl_lock); Py_END_ALLOW_THREADS}

#define ENTER_OVERLAP \

Py_END_ALLOW_THREADS

#define LEAVE_OVERLAP_TCL \

tcl_tstate = NULL; if(tcl_lock)PyThread_release_lock(tcl_lock); }

#define ENTER_PYTHON \

{ PyThreadState *tstate = tcl_tstate; tcl_tstate = NULL; \

if(tcl_lock) \

PyThread_release_lock(tcl_lock); PyEval_RestoreThread((tstate)); }

#define LEAVE_PYTHON \

{ PyThreadState *tstate = PyEval_SaveThread(); \

if(tcl_lock)PyThread_acquire_lock(tcl_lock, 1); tcl_tstate = tstate; }

#define CHECK_TCL_APPARTMENT \

if (((TkappObject *)self)->threaded && \

((TkappObject *)self)->thread_id != Tcl_GetCurrentThread()) { \

PyErr_SetString(PyExc_RuntimeError, \

"Calling Tcl from different appartment"); \

return 0; \

}

#else

#define ENTER_TCL

#define LEAVE_TCL

#define ENTER_OVERLAP

#define LEAVE_OVERLAP_TCL

#define ENTER_PYTHON

#define LEAVE_PYTHON

#define CHECK_TCL_APPARTMENT

#endif

#ifndef FREECAST

#define FREECAST (char *)

#endif

/**** Tkapp Object Declaration ****/

static PyObject *Tkapp_Type;

typedef struct {

PyObject_HEAD

Tcl_Interp *interp;

int wantobjects;

int threaded; /* True if tcl_platform[threaded] */

Tcl_ThreadId thread_id;

int dispatching;

/* We cannot include tclInt.h, as this is internal.

So we cache interesting types here. */

const Tcl_ObjType *OldBooleanType;

const Tcl_ObjType *BooleanType;

const Tcl_ObjType *ByteArrayType;

const Tcl_ObjType *DoubleType;

const Tcl_ObjType *IntType;

const Tcl_ObjType *WideIntType;

const Tcl_ObjType *BignumType;

const Tcl_ObjType *ListType;

const Tcl_ObjType *ProcBodyType;

const Tcl_ObjType *StringType;

} TkappObject;

#define Tkapp_Interp(v) (((TkappObject *) (v))->interp)

#define Tkapp_Result(v) Tcl_GetStringResult(Tkapp_Interp(v))

#define DEBUG_REFCNT(v) (printf("DEBUG: id=%p, refcnt=%i\n", \

(void *) v, Py_REFCNT(v)))

/**** Error Handling ****/

static PyObject *Tkinter_TclError;

static int quitMainLoop = 0;

static int errorInCmd = 0;

static PyObject *excInCmd;

static PyObject *valInCmd;

static PyObject *trbInCmd;

#ifdef TKINTER_PROTECT_LOADTK

static int tk_load_failed = 0;

#endif

static PyObject *

Tkinter_Error(PyObject *v)

{

PyErr_SetString(Tkinter_TclError, Tkapp_Result(v));

return NULL;

}

/**** Utils ****/

static int Tkinter_busywaitinterval = 20;

#ifdef WITH_THREAD

#ifndef MS_WINDOWS

/* Millisecond sleep() for Unix platforms. */

static void

Sleep(int milli)

{

/* XXX Too bad if you don't have select(). */

struct timeval t;

t.tv_sec = milli/1000;

t.tv_usec = (milli%1000) * 1000;

select(0, (fd_set *)0, (fd_set *)0, (fd_set *)0, &t);

}

#endif /* MS_WINDOWS */

/* Wait up to 1s for the mainloop to come up. */

static int

WaitForMainloop(TkappObject* self)

{

int i;

for (i = 0; i < 10; i++) {

if (self->dispatching)

return 1;

Py_BEGIN_ALLOW_THREADS

Sleep(100);

Py_END_ALLOW_THREADS

}

if (self->dispatching)

return 1;

PyErr_SetString(PyExc_RuntimeError, "main thread is not in main loop");

return 0;

}

#endif /* WITH_THREAD */

#define ARGSZ 64

static PyObject *

unicodeFromTclStringAndSize(const char *s, Py_ssize_t size)

{

PyObject *r = PyUnicode_DecodeUTF8(s, size, NULL);

if (!r && PyErr_ExceptionMatches(PyExc_UnicodeDecodeError)) {

/* Tcl encodes null character as \xc0\x80 */

if (memchr(s, '\xc0', size)) {

char *buf, *q;

const char *e = s + size;

PyErr_Clear();

q = buf = (char *)PyMem_Malloc(size);

if (buf == NULL) {

PyErr_NoMemory();

return NULL;

}

while (s != e) {

if (s + 1 != e && s[0] == '\xc0' && s[1] == '\x80') {

*q++ = '\0';

s += 2;

}

else

*q++ = *s++;

}

s = buf;

size = q - s;

r = PyUnicode_DecodeUTF8(s, size, NULL);

PyMem_Free(buf);

}

return r;

}

static PyObject *

unicodeFromTclString(const char *s)

{

return unicodeFromTclStringAndSize(s, strlen(s));

}

static PyObject *

unicodeFromTclObj(Tcl_Obj *value)

{

int len;

char *s = Tcl_GetStringFromObj(value, &len);

return unicodeFromTclStringAndSize(s, len);

}

static PyObject *

Split(const char *list)

{

int argc;

const char **argv;

PyObject *v;

if (list == NULL) {

Py_RETURN_NONE;

}

if (Tcl_SplitList((Tcl_Interp *)NULL, list, &argc, &argv) != TCL_OK) {

/* Not a list.

* Could be a quoted string containing funnies, e.g. {"}.

* Return the string itself.

return unicodeFromTclString(list);

}

if (argc == 0)

v = PyUnicode_FromString("");

else if (argc == 1)

v = unicodeFromTclString(argv[0]);

else if ((v = PyTuple_New(argc)) != NULL) {

int i;

PyObject *w;

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

if ((w = Split(argv[i])) == NULL) {

Py_DECREF(v);

v = NULL;

break;

}

PyTuple_SetItem(v, i, w);

}

Tcl_Free(FREECAST argv);

return v;

}

/* In some cases, Tcl will still return strings that are supposed to

be lists. SplitObj walks through a nested tuple, finding string

objects that need to be split. */

static PyObject *

SplitObj(PyObject *arg)

{

if (PyTuple_Check(arg)) {

Py_ssize_t i, size;

PyObject *elem, *newelem, *result;

size = PyTuple_Size(arg);

result = NULL;

/* Recursively invoke SplitObj for all tuple items.

If this does not return a new object, no action is

needed. */

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

elem = PyTuple_GetItem(arg, i);

newelem = SplitObj(elem);

if (!newelem) {

Py_XDECREF(result);

return NULL;

}

if (!result) {

Py_ssize_t k;

if (newelem == elem) {

Py_DECREF(newelem);

continue;

}

result = PyTuple_New(size);

if (!result)

return NULL;

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

elem = PyTuple_GetItem(arg, k);

Py_INCREF(elem);

PyTuple_SetItem(result, k, elem);

}

PyTuple_SetItem(result, i, newelem);

}

if (result)

return result;

/* Fall through, returning arg. */

}

else if (PyList_Check(arg)) {

Py_ssize_t i, size;

PyObject *elem, *newelem, *result;

size = PyList_GET_SIZE(arg);

result = PyTuple_New(size);

if (!result)

return NULL;

/* Recursively invoke SplitObj for all list items. */

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

elem = PyList_GET_ITEM(arg, i);

newelem = SplitObj(elem);

if (!newelem) {

Py_XDECREF(result);

return NULL;

}

PyTuple_SetItem(result, i, newelem);

}

return result;

}

else if (PyUnicode_Check(arg)) {

int argc;

const char **argv;

char *list = PyUnicode_AsUTF8(arg);

if (list == NULL ||

Tcl_SplitList((Tcl_Interp *)NULL, list, &argc, &argv) != TCL_OK) {

Py_INCREF(arg);

return arg;

}

Tcl_Free(FREECAST argv);

if (argc > 1)

return Split(list);

/* Fall through, returning arg. */

}

else if (PyBytes_Check(arg)) {

int argc;

const char **argv;

char *list = PyBytes_AsString(arg);

if (Tcl_SplitList((Tcl_Interp *)NULL, list, &argc, &argv) != TCL_OK) {

Py_INCREF(arg);

return arg;

}

Tcl_Free(FREECAST argv);

if (argc > 1)

return Split(PyBytes_AsString(arg));

/* Fall through, returning arg. */

}

Py_INCREF(arg);

return arg;

}

/**** Tkapp Object ****/

#ifndef WITH_APPINIT

int

Tcl_AppInit(Tcl_Interp *interp)

{

const char * _tkinter_skip_tk_init;

if (Tcl_Init(interp) == TCL_ERROR) {

PySys_WriteStderr("Tcl_Init error: %s\n", Tcl_GetStringResult(interp));

return TCL_ERROR;

}

_tkinter_skip_tk_init = Tcl_GetVar(interp,

"_tkinter_skip_tk_init", TCL_GLOBAL_ONLY);

if (_tkinter_skip_tk_init != NULL &&

strcmp(_tkinter_skip_tk_init, "1") == 0) {

return TCL_OK;

}

#ifdef TKINTER_PROTECT_LOADTK

if (tk_load_failed) {

PySys_WriteStderr("Tk_Init error: %s\n", TKINTER_LOADTK_ERRMSG);

return TCL_ERROR;

}

#endif

if (Tk_Init(interp) == TCL_ERROR) {

#ifdef TKINTER_PROTECT_LOADTK

tk_load_failed = 1;

#endif

PySys_WriteStderr("Tk_Init error: %s\n", Tcl_GetStringResult(interp));

return TCL_ERROR;

}

return TCL_OK;

}

#endif /* !WITH_APPINIT */

/* Initialize the Tk application; see the `main' function in

* `tkMain.c'.

static void EnableEventHook(void); /* Forward */

static void DisableEventHook(void); /* Forward */

static TkappObject *

Tkapp_New(const char *screenName, const char *className,

int interactive, int wantobjects, int wantTk, int sync,

const char *use)

{

TkappObject *v;

char *argv0;

v = PyObject_New(TkappObject, (PyTypeObject *) Tkapp_Type);

if (v == NULL)

return NULL;

Py_INCREF(Tkapp_Type);

v->interp = Tcl_CreateInterp();

v->wantobjects = wantobjects;

v->threaded = Tcl_GetVar2Ex(v->interp, "tcl_platform", "threaded",

TCL_GLOBAL_ONLY) != NULL;

v->thread_id = Tcl_GetCurrentThread();

v->dispatching = 0;

#ifndef TCL_THREADS

if (v->threaded) {

PyErr_SetString(PyExc_RuntimeError,

"Tcl is threaded but _tkinter is not");

Py_DECREF(v);

return 0;

}

#endif

#ifdef WITH_THREAD

if (v->threaded && tcl_lock) {

/* If Tcl is threaded, we don't need the lock. */

PyThread_free_lock(tcl_lock);

tcl_lock = NULL;

}

#endif

v->OldBooleanType = Tcl_GetObjType("boolean");

v->BooleanType = Tcl_GetObjType("booleanString");

v->ByteArrayType = Tcl_GetObjType("bytearray");

v->DoubleType = Tcl_GetObjType("double");

v->IntType = Tcl_GetObjType("int");

v->WideIntType = Tcl_GetObjType("wideInt");

v->BignumType = Tcl_GetObjType("bignum");

v->ListType = Tcl_GetObjType("list");

v->ProcBodyType = Tcl_GetObjType("procbody");

v->StringType = Tcl_GetObjType("string");

/* Delete the 'exit' command, which can screw things up */

Tcl_DeleteCommand(v->interp, "exit");

if (screenName != NULL)

Tcl_SetVar2(v->interp, "env", "DISPLAY",

screenName, TCL_GLOBAL_ONLY);

if (interactive)

Tcl_SetVar(v->interp, "tcl_interactive", "1", TCL_GLOBAL_ONLY);

else

Tcl_SetVar(v->interp, "tcl_interactive", "0", TCL_GLOBAL_ONLY);

/* This is used to get the application class for Tk 4.1 and up */

argv0 = (char*)PyMem_Malloc(strlen(className) + 1);

if (!argv0) {

PyErr_NoMemory();

Py_DECREF(v);

return NULL;

}

strcpy(argv0, className);

if (Py_ISUPPER(Py_CHARMASK(argv0[0])))

argv0[0] = Py_TOLOWER(Py_CHARMASK(argv0[0]));

Tcl_SetVar(v->interp, "argv0", argv0, TCL_GLOBAL_ONLY);

PyMem_Free(argv0);

if (! wantTk) {

Tcl_SetVar(v->interp,

"_tkinter_skip_tk_init", "1", TCL_GLOBAL_ONLY);

}

#ifdef TKINTER_PROTECT_LOADTK

else if (tk_load_failed) {

Tcl_SetVar(v->interp,

"_tkinter_tk_failed", "1", TCL_GLOBAL_ONLY);

}

#endif

/* some initial arguments need to be in argv */

if (sync || use) {

char *args;

Py_ssize_t len = 0;

if (sync)

len += sizeof "-sync";

if (use)

len += strlen(use) + sizeof "-use "; /* never overflows */

args = (char*)PyMem_Malloc(len);

if (!args) {

PyErr_NoMemory();

Py_DECREF(v);

return NULL;

}

args[0] = '\0';

if (sync)

strcat(args, "-sync");

if (use) {

if (sync)

strcat(args, " ");

strcat(args, "-use ");

strcat(args, use);

}

Tcl_SetVar(v->interp, "argv", args, TCL_GLOBAL_ONLY);

PyMem_Free(args);

}

if (Tcl_AppInit(v->interp) != TCL_OK) {

PyObject *result = Tkinter_Error((PyObject *)v);

#ifdef TKINTER_PROTECT_LOADTK

if (wantTk) {

const char *_tkinter_tk_failed;

_tkinter_tk_failed = Tcl_GetVar(v->interp,

"_tkinter_tk_failed", TCL_GLOBAL_ONLY);

if ( _tkinter_tk_failed != NULL &&

strcmp(_tkinter_tk_failed, "1") == 0) {

tk_load_failed = 1;

}

#endif

Py_DECREF((PyObject *)v);

return (TkappObject *)result;

}

EnableEventHook();

return v;

}

#ifdef WITH_THREAD

static void

Tkapp_ThreadSend(TkappObject *self, Tcl_Event *ev,

Tcl_Condition *cond, Tcl_Mutex *mutex)

{

Py_BEGIN_ALLOW_THREADS;

Tcl_MutexLock(mutex);

Tcl_ThreadQueueEvent(self->thread_id, ev, TCL_QUEUE_TAIL);

Tcl_ThreadAlert(self->thread_id);

Tcl_ConditionWait(cond, mutex, NULL);

Tcl_MutexUnlock(mutex);

Py_END_ALLOW_THREADS

}

#endif

/** Tcl Eval **/

typedef struct {

PyObject_HEAD

Tcl_Obj *value;

PyObject *string; /* This cannot cause cycles. */

} PyTclObject;

static PyObject *PyTclObject_Type;

#define PyTclObject_Check(v) ((v)->ob_type == (PyTypeObject *) PyTclObject_Type)

static PyObject *

newPyTclObject(Tcl_Obj *arg)

{

PyTclObject *self;

self = PyObject_New(PyTclObject, (PyTypeObject *) PyTclObject_Type);

if (self == NULL)

return NULL;

Py_INCREF(PyTclObject_Type);

Tcl_IncrRefCount(arg);

self->value = arg;

self->string = NULL;

return (PyObject*)self;

}

static void

PyTclObject_dealloc(PyTclObject *self)

{

PyObject *tp = (PyObject *) Py_TYPE(self);

Tcl_DecrRefCount(self->value);

Py_XDECREF(self->string);

PyObject_Del(self);

Py_DECREF(tp);

}

static char*

PyTclObject_TclString(PyObject *self)

{

return Tcl_GetString(((PyTclObject*)self)->value);

}

/* Like _str, but create Unicode if necessary. */

PyDoc_STRVAR(PyTclObject_string__doc__,

"the string representation of this object, either as str or bytes");

static PyObject *

PyTclObject_string(PyTclObject *self, void *ignored)

{

if (!self->string) {

self->string = unicodeFromTclObj(self->value);

if (!self->string)

return NULL;

}

Py_INCREF(self->string);

return self->string;

}

static PyObject *

PyTclObject_str(PyTclObject *self, void *ignored)

{

if (self->string) {

Py_INCREF(self->string);

return self->string;

}

/* XXX Could chache result if it is non-ASCII. */

return unicodeFromTclObj(self->value);

}

static PyObject *

PyTclObject_repr(PyTclObject *self)

{

PyObject *repr, *str = PyTclObject_str(self, NULL);

if (str == NULL)

return NULL;

repr = PyUnicode_FromFormat("<%s object: %R>",

self->value->typePtr->name, str);

Py_DECREF(str);

return repr;

}

#define TEST_COND(cond) ((cond) ? Py_True : Py_False)

static PyObject *

PyTclObject_richcompare(PyObject *self, PyObject *other, int op)

{

int result;

PyObject *v;

/* neither argument should be NULL, unless something's gone wrong */

if (self == NULL || other == NULL) {

PyErr_BadInternalCall();

return NULL;

}

/* both arguments should be instances of PyTclObject */

if (!PyTclObject_Check(self) || !PyTclObject_Check(other)) {

v = Py_NotImplemented;

goto finished;

}

if (self == other)

/* fast path when self and other are identical */

result = 0;

else

result = strcmp(Tcl_GetString(((PyTclObject *)self)->value),

Tcl_GetString(((PyTclObject *)other)->value));

/* Convert return value to a Boolean */

switch (op) {

case Py_EQ:

v = TEST_COND(result == 0);

break;

case Py_NE:

v = TEST_COND(result != 0);

break;

case Py_LE:

v = TEST_COND(result <= 0);

break;

case Py_GE:

v = TEST_COND(result >= 0);

break;

case Py_LT:

v = TEST_COND(result < 0);

break;

case Py_GT:

v = TEST_COND(result > 0);

break;

default:

PyErr_BadArgument();

return NULL;

}

finished:

Py_INCREF(v);

return v;

}

PyDoc_STRVAR(get_typename__doc__, "name of the Tcl type");

static PyObject*

get_typename(PyTclObject* obj, void* ignored)

{

return unicodeFromTclString(obj->value->typePtr->name);

}

static PyGetSetDef PyTclObject_getsetlist[] = {

{"typename", (getter)get_typename, NULL, get_typename__doc__},

{"string", (getter)PyTclObject_string, NULL,

PyTclObject_string__doc__},

{0},

};

static PyType_Slot PyTclObject_Type_slots[] = {

{Py_tp_dealloc, (destructor)PyTclObject_dealloc},

{Py_tp_repr, (reprfunc)PyTclObject_repr},

{Py_tp_str, (reprfunc)PyTclObject_str},

{Py_tp_getattro, PyObject_GenericGetAttr},

{Py_tp_richcompare, PyTclObject_richcompare},

{Py_tp_getset, PyTclObject_getsetlist},

{0, 0}

};

static PyType_Spec PyTclObject_Type_spec = {

"_tkinter.Tcl_Obj",

sizeof(PyTclObject),

Py_TPFLAGS_DEFAULT,

PyTclObject_Type_slots,

};

#if PY_SIZE_MAX > INT_MAX

#define CHECK_STRING_LENGTH(s) do { \

if (s != NULL && strlen(s) >= INT_MAX) { \

PyErr_SetString(PyExc_OverflowError, "string is too long"); \

return NULL; \

} } while(0)

#else

#define CHECK_STRING_LENGTH(s)

#endif

#ifdef HAVE_LIBTOMMAMTH

static Tcl_Obj*

asBignumObj(PyObject *value)

{

Tcl_Obj *result;

int neg;

PyObject *hexstr;

char *hexchars;

mp_int bigValue;

neg = Py_SIZE(value) < 0;

hexstr = _PyLong_Format(value, 16);

if (hexstr == NULL)

return NULL;

hexchars = PyUnicode_AsUTF8(hexstr);

if (hexchars == NULL) {

Py_DECREF(hexstr);

return NULL;

}

hexchars += neg + 2; /* skip sign and "0x" */

mp_init(&bigValue);

if (mp_read_radix(&bigValue, hexchars, 16) != MP_OKAY) {

mp_clear(&bigValue);

Py_DECREF(hexstr);

PyErr_NoMemory();

return NULL;

}

Py_DECREF(hexstr);

bigValue.sign = neg ? MP_NEG : MP_ZPOS;

result = Tcl_NewBignumObj(&bigValue);

mp_clear(&bigValue);

if (result == NULL) {

PyErr_NoMemory();

return NULL;

}

return result;

}

#endif

static Tcl_Obj*

AsObj(PyObject *value)

{

Tcl_Obj *result;

if (PyBytes_Check(value)) {

if (PyBytes_GET_SIZE(value) >= INT_MAX) {

PyErr_SetString(PyExc_OverflowError, "bytes object is too long");

return NULL;

}

return Tcl_NewByteArrayObj((unsigned char *)PyBytes_AS_STRING(value),

(int)PyBytes_GET_SIZE(value));

}

if (PyBool_Check(value))

return Tcl_NewBooleanObj(PyObject_IsTrue(value));

if (PyLong_CheckExact(value)) {

int overflow;

long longValue;

#ifdef TCL_WIDE_INT_TYPE

Tcl_WideInt wideValue;

#endif

longValue = PyLong_AsLongAndOverflow(value, &overflow);

if (!overflow) {

return Tcl_NewLongObj(longValue);

}

/* If there is an overflow in the long conversion,

fall through to wideInt handling. */

#ifdef TCL_WIDE_INT_TYPE

if (_PyLong_AsByteArray((PyLongObject *)value,

(unsigned char *)(void *)&wideValue,

sizeof(wideValue),

PY_LITTLE_ENDIAN,

/* signed */ 1) == 0) {

return Tcl_NewWideIntObj(wideValue);

}

PyErr_Clear();

#endif

/* If there is an overflow in the wideInt conversion,

fall through to bignum handling. */

#ifdef HAVE_LIBTOMMAMTH

return asBignumObj(value);

#endif

/* If there is no wideInt or bignum support,

fall through to default object handling. */

}

if (PyFloat_Check(value))

return Tcl_NewDoubleObj(PyFloat_AS_DOUBLE(value));

if (PyTuple_Check(value) || PyList_Check(value)) {

Tcl_Obj **argv;

Py_ssize_t size, i;

size = PySequence_Fast_GET_SIZE(value);

if (size == 0)

return Tcl_NewListObj(0, NULL);

if (!CHECK_SIZE(size, sizeof(Tcl_Obj *))) {

PyErr_SetString(PyExc_OverflowError,

PyTuple_Check(value) ? "tuple is too long" :

"list is too long");

return NULL;

}

argv = (Tcl_Obj **) PyMem_Malloc(((size_t)size) * sizeof(Tcl_Obj *));

if (!argv) {

PyErr_NoMemory();

View remainder of file in raw view

FilesExpand file tree

_tkinter.c

Latest commit

History

_tkinter.c

File metadata and controls