summaryrefslogtreecommitdiffstats
path: root/win/winMain.c
blob: c679d81fb0ccf87c7e5700d4c5a4a4de8c3ac4fe (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
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
/*
 * winMain.c --
 *
 *	Provides a default version of the main program and Tcl_AppInit
 *	procedure for wish and other Tk-based applications.
 *
 * Copyright (c) 1993 The Regents of the University of California.
 * Copyright (c) 1994-1997 Sun Microsystems, Inc.
 * Copyright (c) 1998-1999 Scriptics Corporation.
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: winMain.c,v 1.39 2010/11/24 10:34:18 nijtmans Exp $
 */

#include "tk.h"
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#undef WIN32_LEAN_AND_MEAN
#include <locale.h>
#include <stdlib.h>
#include <tchar.h>

#ifdef TK_TEST
extern Tcl_PackageInitProc Tktest_Init;
#endif /* TK_TEST */

#if defined(STATIC_BUILD) && TCL_USE_STATIC_PACKAGES
extern Tcl_PackageInitProc Registry_Init;
extern Tcl_PackageInitProc Dde_Init;
extern Tcl_PackageInitProc Dde_SafeInit;
#endif

#ifdef TCL_BROKEN_MAINARGS
static void setargv(int *argcPtr, TCHAR ***argvPtr);
#endif
extern void TkpDisplayWarning(const char *, const char *);

/*
 * Forward declarations for procedures defined later in this file:
 */

static void WishPanic(const char *format, ...);
static BOOL consoleRequired = TRUE;

/*
 * The following #if block allows you to change the AppInit function by using
 * a #define of TCL_LOCAL_APPINIT instead of rewriting this entire file. The
 * #if checks for that #define and uses Tcl_AppInit if it doesn't exist.
 */

#ifndef TK_LOCAL_APPINIT
#define TK_LOCAL_APPINIT Tcl_AppInit
#endif
extern int TK_LOCAL_APPINIT(Tcl_Interp *interp);

/*
 * The following #if block allows you to change how Tcl finds the startup
 * script, prime the library or encoding paths, fiddle with the argv, etc.,
 * without needing to rewrite Tk_Main()
 */

#ifdef TK_LOCAL_MAIN_HOOK
extern int TK_LOCAL_MAIN_HOOK(int *argc, TCHAR ***argv);
#endif

/*
 *----------------------------------------------------------------------
 *
 * _tWinMain --
 *
 *	Main entry point from Windows.
 *
 * Results:
 *	Returns false if initialization fails, otherwise it never returns.
 *
 * Side effects:
 *	Just about anything, since from here we call arbitrary Tcl code.
 *
 *----------------------------------------------------------------------
 */

#ifdef UNICODE
/* workaround for bug in some versions of mingw32-w64 */
#   undef _tWinMain
#   define _tWinMain wWinMain
#   undef __targv
#   define __targv __wargv
#endif

int APIENTRY
#ifdef TCL_BROKEN_MAINARGS
WinMain(
    HINSTANCE hInstance,
    HINSTANCE hPrevInstance,
    LPSTR lpszCmdLine,
    int nCmdShow)
#else
_tWinMain(
    HINSTANCE hInstance,
    HINSTANCE hPrevInstance,
    LPTSTR lpszCmdLine,
    int nCmdShow)
#endif
{
    TCHAR **argv;
    int argc;
    TCHAR *p;

    (Tcl_SetPanicProc)(WishPanic);

    /*
     * Create the console channels and install them as the standard channels.
     * All I/O will be discarded until Tk_CreateConsoleWindow is called to
     * attach the console to a text widget.
     */

    consoleRequired = TRUE;

    /*
     * Set up the default locale to be standard "C" locale so parsing is
     * performed correctly.
     */

    setlocale(LC_ALL, "C");

    /*
     * Get our args from the c-runtime. Ignore lpszCmdLine.
     */

#if defined(TCL_BROKEN_MAINARGS)
    setargv(&argc, &argv);
#else
    argc = __argc;
    argv = __targv;
#endif

    /*
     * Forward slashes substituted for backslashes.
     */

    for (p = argv[0]; *p != TEXT('\0'); p++) {
	if (*p == TEXT('\\')) {
	    *p = TEXT('/');
	}
    }

#ifdef TK_LOCAL_MAIN_HOOK
    TK_LOCAL_MAIN_HOOK(&argc, &argv);
#endif

    Tk_Main(argc, argv, TK_LOCAL_APPINIT);
    return 0;			/* Needed only to prevent compiler warning. */
}

/*
 *----------------------------------------------------------------------
 *
 * Tcl_AppInit --
 *
 *	This procedure performs application-specific initialization. Most
 *	applications, especially those that incorporate additional packages,
 *	will have their own version of this procedure.
 *
 * Results:
 *	Returns a standard Tcl completion code, and leaves an error message in
 *	the interp's result if an error occurs.
 *
 * Side effects:
 *	Depends on the startup script.
 *
 *----------------------------------------------------------------------
 */

int
Tcl_AppInit(
    Tcl_Interp *interp)		/* Interpreter for application. */
{
    if ((Tcl_Init)(interp) == TCL_ERROR) {
	goto error;
    }
    if (Tk_Init(interp) == TCL_ERROR) {
	goto error;
    }
    Tcl_StaticPackage(interp, "Tk", Tk_Init, Tk_SafeInit);

    /*
     * Initialize the console only if we are running as an interactive
     * application.
     */

    if (consoleRequired) {
	if (Tk_CreateConsoleWindow(interp) == TCL_ERROR) {
	    goto error;
	}
    }
#if defined(STATIC_BUILD) && TCL_USE_STATIC_PACKAGES
    if (Registry_Init(interp) == TCL_ERROR) {
	goto error;
    }
    Tcl_StaticPackage(interp, "registry", Registry_Init, NULL);

    if (Dde_Init(interp) == TCL_ERROR) {
	goto error;
    }
    Tcl_StaticPackage(interp, "dde", Dde_Init, Dde_SafeInit);
#endif

#ifdef TK_TEST
    if (Tktest_Init(interp) == TCL_ERROR) {
	goto error;
    }
    Tcl_StaticPackage(interp, "Tktest", Tktest_Init, 0);
#endif /* TK_TEST */

    /*
     * Call the init procedures for included packages. Each call should look
     * like this:
     *
     * if (Mod_Init(interp) == TCL_ERROR) {
     *     return TCL_ERROR;
     * }
     *
     * where "Mod" is the name of the module. (Dynamically-loadable packages
     * should have the same entry-point name.)
     */

    /*
     * Call Tcl_CreateCommand for application-specific commands, if they
     * weren't already created by the init procedures called above.
     */

    /*
     * Specify a user-specific startup file to invoke if the application is
     * run interactively. Typically the startup file is "~/.apprc" where "app"
     * is the name of the application. If this line is deleted then no user-
     * specific startup file will be run under any conditions.
     */

    (Tcl_SetVar)(interp, "tcl_rcFileName", "~/wishrc.tcl", TCL_GLOBAL_ONLY);
    return TCL_OK;

error:
    WishPanic("%s", (Tcl_GetStringResult)(interp));

    /*
     * We won't reach this, but we need the return.
     */

    return TCL_ERROR;
}

/*
 *----------------------------------------------------------------------
 *
 * WishPanic --
 *
 *	Display a message and exit.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Exits the program.
 *
 *----------------------------------------------------------------------
 */

/* Make sure we don't call those through the stub table */
#undef Tcl_WinUtfToTChar
#undef Tcl_DStringFree

void
WishPanic(
    const char *format, ...)
{
    va_list argList;
    char buf[1024];

    MessageBeep(MB_ICONEXCLAMATION);
    va_start(argList, format);
    vsprintf(buf, format, argList);
	TkpDisplayWarning(buf, "Error in Wish");
#ifdef _MSC_VER
    DebugBreak();
#endif
    ExitProcess(1);
}

#if !defined(TCL_BROKEN_MAINARGS) || defined(TK_TEST)
/*
 *----------------------------------------------------------------------
 *
 * _tmain --
 *
 *	Main entry point from the console.
 *
 * Results:
 *	None: Tk_Main never returns here, so this procedure never returns
 *	either.
 *
 * Side effects:
 *	Whatever the applications does.
 *
 *----------------------------------------------------------------------
 */

#ifdef TCL_BROKEN_MAINARGS
int
main(
    int argc,
    char **dummy)
{
    TCHAR **argv;
#else
int
_tmain(
    int argc,
    TCHAR **argv)
{
#endif
    (Tcl_SetPanicProc)(WishPanic);

    /*
     * Set up the default locale to be standard "C" locale so parsing is
     * performed correctly.
     */

    setlocale(LC_ALL, "C");

#ifdef TCL_BROKEN_MAINARGS
    /*
     * Get our args from the c-runtime. Ignore argc/argv.
     */

    setargv(&argc, &argv);
#endif
    /*
     * Console emulation widget not required as this entry is from the
     * console subsystem, thus stdin,out,err already have end-points.
     */

    consoleRequired = FALSE;

#ifdef TK_LOCAL_MAIN_HOOK
    TK_LOCAL_MAIN_HOOK(&argc, &argv);
#endif

    Tk_Main(argc, argv, Tcl_AppInit);
    return 0;
}
#endif /* !__GNUC__ || TK_TEST */


/*
 *-------------------------------------------------------------------------
 *
 * setargv --
 *
 *	Parse the Windows command line string into argc/argv. Done here
 *	because we don't trust the builtin argument parser in crt0. Windows
 *	applications are responsible for breaking their command line into
 *	arguments.
 *
 *	2N backslashes + quote -> N backslashes + begin quoted string
 *	2N + 1 backslashes + quote -> literal
 *	N backslashes + non-quote -> literal
 *	quote + quote in a quoted string -> single quote
 *	quote + quote not in quoted string -> empty string
 *	quote -> begin quoted string
 *
 * Results:
 *	Fills argcPtr with the number of arguments and argvPtr with the array
 *	of arguments.
 *
 * Side effects:
 *	Memory allocated.
 *
 *--------------------------------------------------------------------------
 */

#ifdef TCL_BROKEN_MAINARGS
static void
setargv(
    int *argcPtr,		/* Filled with number of argument strings. */
    TCHAR ***argvPtr)		/* Filled with argument strings (malloc'd). */
{
    TCHAR *cmdLine, *p, *arg, *argSpace;
    TCHAR **argv;
    int argc, size, inquote, copy, slashes;

    cmdLine = GetCommandLine();

    /*
     * Precompute an overly pessimistic guess at the number of arguments in
     * the command line by counting non-space spans.
     */

    size = 2;
    for (p = cmdLine; *p != TEXT('\0'); p++) {
	if ((*p == TEXT(' ')) || (*p == TEXT('\t'))) {	/* INTL: ISO space. */
	    size++;
	    while ((*p == TEXT(' ')) || (*p == TEXT('\t'))) { /* INTL: ISO space. */
		p++;
	    }
	    if (*p == TEXT('\0')) {
		break;
	    }
	}
    }

    /* Make sure we don't call ckalloc through the (not yet initialized) stub table */
    #undef Tcl_Alloc
    #undef Tcl_DbCkalloc

    argSpace = (TCHAR *) ckalloc(
	    (unsigned) (size * sizeof(char *) + (_tcslen(cmdLine) * sizeof(TCHAR)) + sizeof(TCHAR)));
    argv = (TCHAR **) argSpace;
    argSpace += size * (sizeof(char *)/sizeof(TCHAR));
    size--;

    p = cmdLine;
    for (argc = 0; argc < size; argc++) {
	argv[argc] = arg = argSpace;
	while ((*p == TEXT(' ')) || (*p == TEXT('\t'))) {	/* INTL: ISO space. */
	    p++;
	}
	if (*p == TEXT('\0')) {
	    break;
	}

	inquote = 0;
	slashes = 0;
	while (1) {
	    copy = 1;
	    while (*p == TEXT('\\')) {
		slashes++;
		p++;
	    }
	    if (*p == TEXT('"')) {
		if ((slashes & 1) == 0) {
		    copy = 0;
		    if ((inquote) && (p[1] == TEXT('"'))) {
			p++;
			copy = 1;
		    } else {
			inquote = !inquote;
		    }
		}
		slashes >>= 1;
	    }

	    while (slashes) {
		*arg = TEXT('\\');
		arg++;
		slashes--;
	    }

	    if ((*p == TEXT('\0')) || (!inquote &&
		    ((*p == TEXT(' ')) || (*p == TEXT('\t'))))) {	/* INTL: ISO space. */
		break;
	    }
	    if (copy != 0) {
		*arg = *p;
		arg++;
	    }
	    p++;
	}
	*arg = '\0';
	argSpace = arg + 1;
    }
    argv[argc] = NULL;

    *argcPtr = argc;
    *argvPtr = argv;
}
#endif /* TCL_BROKEN_MAINARGS */

/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:
 */