summaryrefslogtreecommitdiffstats
path: root/win/tclWinInit.c
blob: 7824ebf975fffb36814df2edde9f6df83564bfc9 (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
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
/*
 * tclWinInit.c --
 *
 *	Contains the Windows-specific interpreter initialization functions.
 *
 * Copyright (c) 1994-1997 Sun Microsystems, Inc.
 * Copyright (c) 1998-1999 by Scriptics Corporation.
 * All rights reserved.
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: tclWinInit.c,v 1.72 2007/04/17 14:49:54 dkf Exp $
 */

#include "tclWinInt.h"
#include <winnt.h>
#include <winbase.h>
#include <lmcons.h>

/*
 * GetUserName() is found in advapi32.dll
 */
#ifdef _MSC_VER
#   pragma comment(lib, "advapi32.lib")
#endif

/*
 * The following declaration is a workaround for some Microsoft brain damage.
 * The SYSTEM_INFO structure is different in various releases, even though the
 * layout is the same. So we overlay our own structure on top of it so we can
 * access the interesting slots in a uniform way.
 */

typedef struct {
    WORD wProcessorArchitecture;
    WORD wReserved;
} OemId;

/*
 * The following macros are missing from some versions of winnt.h.
 */

#ifndef PROCESSOR_ARCHITECTURE_INTEL
#define PROCESSOR_ARCHITECTURE_INTEL		0
#endif
#ifndef PROCESSOR_ARCHITECTURE_MIPS
#define PROCESSOR_ARCHITECTURE_MIPS		1
#endif
#ifndef PROCESSOR_ARCHITECTURE_ALPHA
#define PROCESSOR_ARCHITECTURE_ALPHA		2
#endif
#ifndef PROCESSOR_ARCHITECTURE_PPC
#define PROCESSOR_ARCHITECTURE_PPC		3
#endif
#ifndef PROCESSOR_ARCHITECTURE_SHX
#define PROCESSOR_ARCHITECTURE_SHX		4
#endif
#ifndef PROCESSOR_ARCHITECTURE_ARM
#define PROCESSOR_ARCHITECTURE_ARM		5
#endif
#ifndef PROCESSOR_ARCHITECTURE_IA64
#define PROCESSOR_ARCHITECTURE_IA64		6
#endif
#ifndef PROCESSOR_ARCHITECTURE_ALPHA64
#define PROCESSOR_ARCHITECTURE_ALPHA64		7
#endif
#ifndef PROCESSOR_ARCHITECTURE_MSIL
#define PROCESSOR_ARCHITECTURE_MSIL		8
#endif
#ifndef PROCESSOR_ARCHITECTURE_AMD64
#define PROCESSOR_ARCHITECTURE_AMD64		9
#endif
#ifndef PROCESSOR_ARCHITECTURE_IA32_ON_WIN64
#define PROCESSOR_ARCHITECTURE_IA32_ON_WIN64	10
#endif
#ifndef PROCESSOR_ARCHITECTURE_UNKNOWN
#define PROCESSOR_ARCHITECTURE_UNKNOWN		0xFFFF
#endif

/*
 * The following arrays contain the human readable strings for the Windows
 * platform and processor values.
 */


#define NUMPLATFORMS 4
static char* platforms[NUMPLATFORMS] = {
    "Win32s", "Windows 95", "Windows NT", "Windows CE"
};

#define NUMPROCESSORS 11
static char* processors[NUMPROCESSORS] = {
    "intel", "mips", "alpha", "ppc", "shx", "arm", "ia64", "alpha64", "msil",
    "amd64", "ia32_on_win64"
};

/*
 * The default directory in which the init.tcl file is expected to be found.
 */

static TclInitProcessGlobalValueProc	InitializeDefaultLibraryDir;
static ProcessGlobalValue defaultLibraryDir =
	{0, 0, NULL, NULL, InitializeDefaultLibraryDir, NULL, NULL};

static void		AppendEnvironment(Tcl_Obj *listPtr, CONST char *lib);
static int		ToUtf(CONST WCHAR *wSrc, char *dst);

/*
 *---------------------------------------------------------------------------
 *
 * TclpInitPlatform --
 *
 *	Initialize all the platform-dependant things like signals and
 *	floating-point error handling.
 *
 *	Called at process initialization time.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	None.
 *
 *---------------------------------------------------------------------------
 */

void
TclpInitPlatform(void)
{
    tclPlatform = TCL_PLATFORM_WINDOWS;

    /*
     * The following code stops Windows 3.X and Windows NT 3.51 from
     * automatically putting up Sharing Violation dialogs, e.g, when someone
     * tries to access a file that is locked or a drive with no disk in it.
     * Tcl already returns the appropriate error to the caller, and they can
     * decide to put up their own dialog in response to that failure.
     *
     * Under 95 and NT 4.0, this is a NOOP because the system doesn't
     * automatically put up dialogs when the above operations fail.
     */

    SetErrorMode(SetErrorMode(0) | SEM_FAILCRITICALERRORS);

#ifdef STATIC_BUILD
    /*
     * If we are in a statically linked executable, then we need to explicitly
     * initialize the Windows function tables here since DllMain() will not be
     * invoked.
     */

    TclWinInit(GetModuleHandle(NULL));
#endif
}

/*
 *-------------------------------------------------------------------------
 *
 * TclpInitLibraryPath --
 *
 *	This is the fallback routine that sets the library path if the
 *	application has not set one by the first time it is needed.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Sets the library path to an initial value.
 *
 *-------------------------------------------------------------------------
 */

void
TclpInitLibraryPath(
    char **valuePtr,
    int *lengthPtr,
    Tcl_Encoding *encodingPtr)
{
#define LIBRARY_SIZE	    32
    Tcl_Obj *pathPtr;
    char installLib[LIBRARY_SIZE];
    char *bytes;

    pathPtr = Tcl_NewObj();

    /*
     * Initialize the substring used when locating the script library. The
     * installLib variable computes the script library path relative to the
     * installed DLL.
     */

    sprintf(installLib, "lib/tcl%s", TCL_VERSION);

    /*
     * Look for the library relative to the TCL_LIBRARY env variable. If the
     * last dirname in the TCL_LIBRARY path does not match the last dirname in
     * the installLib variable, use the last dir name of installLib in
     * addition to the orginal TCL_LIBRARY path.
     */

    AppendEnvironment(pathPtr, installLib);

    /*
     * Look for the library in its default location.
     */

    Tcl_ListObjAppendElement(NULL, pathPtr,
	    TclGetProcessGlobalValue(&defaultLibraryDir));

    *encodingPtr = NULL;
    bytes = Tcl_GetStringFromObj(pathPtr, lengthPtr);
    *valuePtr = ckalloc((unsigned int)(*lengthPtr)+1);
    memcpy(*valuePtr, bytes, (size_t)(*lengthPtr)+1);
    Tcl_DecrRefCount(pathPtr);
}

/*
 *---------------------------------------------------------------------------
 *
 * AppendEnvironment --
 *
 *	Append the value of the TCL_LIBRARY environment variable onto the path
 *	pointer. If the env variable points to another version of tcl (e.g.
 *	"tcl7.6") also append the path to this version (e.g.,
 *	"tcl7.6/../tcl8.2")
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	None.
 *
 *---------------------------------------------------------------------------
 */

static void
AppendEnvironment(
    Tcl_Obj *pathPtr,
    CONST char *lib)
{
    int pathc;
    WCHAR wBuf[MAX_PATH];
    char buf[MAX_PATH * TCL_UTF_MAX];
    Tcl_Obj *objPtr;
    Tcl_DString ds;
    CONST char **pathv;
    char *shortlib;

    /*
     * The shortlib value needs to be the tail component of the lib path. For
     * example, "lib/tcl8.4" -> "tcl8.4" while "usr/share/tcl8.5" -> "tcl8.5".
     */

    for (shortlib = (char *) &lib[strlen(lib)-1]; shortlib>lib ; shortlib--) {
	if (*shortlib == '/') {
	    if ((unsigned)(shortlib - lib) == strlen(lib) - 1) {
		Tcl_Panic("last character in lib cannot be '/'");
	    }
	    shortlib++;
	    break;
	}
    }
    if (shortlib == lib) {
	Tcl_Panic("no '/' character found in lib");
    }

    /*
     * The "L" preceeding the TCL_LIBRARY string is used to tell VC++ that
     * this is a unicode string.
     */

    if (GetEnvironmentVariableW(L"TCL_LIBRARY", wBuf, MAX_PATH) == 0) {
	buf[0] = '\0';
	GetEnvironmentVariableA("TCL_LIBRARY", buf, MAX_PATH);
    } else {
	ToUtf(wBuf, buf);
    }

    if (buf[0] != '\0') {
	objPtr = Tcl_NewStringObj(buf, -1);
	Tcl_ListObjAppendElement(NULL, pathPtr, objPtr);

	TclWinNoBackslash(buf);
	Tcl_SplitPath(buf, &pathc, &pathv);

	/*
	 * The lstrcmpi() will work even if pathv[pathc-1] is random UTF-8
	 * chars because I know shortlib is ascii.
	 */

	if ((pathc > 0) && (lstrcmpiA(shortlib, pathv[pathc - 1]) != 0)) {
	    CONST char *str;

	    /*
	     * TCL_LIBRARY is set but refers to a different tcl installation
	     * than the current version. Try fiddling with the specified
	     * directory to make it refer to this installation by removing the
	     * old "tclX.Y" and substituting the current version string.
	     */

	    pathv[pathc - 1] = shortlib;
	    Tcl_DStringInit(&ds);
	    str = Tcl_JoinPath(pathc, pathv, &ds);
	    objPtr = Tcl_NewStringObj(str, Tcl_DStringLength(&ds));
	    Tcl_DStringFree(&ds);
	} else {
	    objPtr = Tcl_NewStringObj(buf, -1);
	}
	Tcl_ListObjAppendElement(NULL, pathPtr, objPtr);
	ckfree((char *) pathv);
    }
}

/*
 *---------------------------------------------------------------------------
 *
 * InitializeDefaultLibraryDir --
 *
 *	Locate the Tcl script library default location relative to the
 *	location of the Tcl DLL.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	None.
 *
 *---------------------------------------------------------------------------
 */

static void
InitializeDefaultLibraryDir(
    char **valuePtr,
    int *lengthPtr,
    Tcl_Encoding *encodingPtr)
{
    HMODULE hModule = TclWinGetTclInstance();
    WCHAR wName[MAX_PATH + LIBRARY_SIZE];
    char name[(MAX_PATH + LIBRARY_SIZE) * TCL_UTF_MAX];
    char *end, *p;

    if (GetModuleFileNameW(hModule, wName, MAX_PATH) == 0) {
	GetModuleFileNameA(hModule, name, MAX_PATH);
    } else {
	ToUtf(wName, name);
    }

    end = strrchr(name, '\\');
    *end = '\0';
    p = strrchr(name, '\\');
    if (p != NULL) {
	end = p;
    }
    *end = '\\';

    TclWinNoBackslash(name);
    sprintf(end + 1, "lib/tcl%s", TCL_VERSION);
    *lengthPtr = strlen(name);
    *valuePtr = ckalloc((unsigned int) *lengthPtr + 1);
    *encodingPtr = NULL;
    memcpy(*valuePtr, name, (size_t) *lengthPtr + 1);
}

/*
 *---------------------------------------------------------------------------
 *
 * ToUtf --
 *
 *	Convert a char string to a UTF string.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	None.
 *
 *---------------------------------------------------------------------------
 */

static int
ToUtf(
    CONST WCHAR *wSrc,
    char *dst)
{
    char *start;

    start = dst;
    while (*wSrc != '\0') {
	dst += Tcl_UniCharToUtf(*wSrc, dst);
	wSrc++;
    }
    *dst = '\0';
    return (int) (dst - start);
}

/*
 *---------------------------------------------------------------------------
 *
 * TclWinEncodingsCleanup --
 *
 *	Reset information to its original state in finalization to allow for
 *	reinitialization to be possible. This must not be called until after
 *	the filesystem has been finalised, or exit crashes may occur when
 *	using virtual filesystems.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Static information reset to startup state.
 *
 *---------------------------------------------------------------------------
 */

void
TclWinEncodingsCleanup(void)
{
    TclWinResetInterfaceEncodings();
}

/*
 *---------------------------------------------------------------------------
 *
 * TclpSetInitialEncodings --
 *
 *	Based on the locale, determine the encoding of the operating system
 *	and the default encoding for newly opened files.
 *
 *	Called at process initialization time, and part way through startup,
 *	we verify that the initial encodings were correctly setup. Depending
 *	on Tcl's environment, there may not have been enough information first
 *	time through (above).
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The Tcl library path is converted from native encoding to UTF-8, on
 *	the first call, and the encodings may be changed on first or second
 *	call.
 *
 *---------------------------------------------------------------------------
 */

void
TclpSetInitialEncodings(void)
{
    Tcl_DString encodingName;

    TclpSetInterfaces();
    Tcl_SetSystemEncoding(NULL,
	    Tcl_GetEncodingNameFromEnvironment(&encodingName));
    Tcl_DStringFree(&encodingName);
}

void
TclpSetInterfaces(void)
{
    int platformId, useWide;

    platformId = TclWinGetPlatformId();
    useWide = ((platformId == VER_PLATFORM_WIN32_NT)
	    || (platformId == VER_PLATFORM_WIN32_CE));
    TclWinSetInterfaces(useWide);
}

CONST char *
Tcl_GetEncodingNameFromEnvironment(
    Tcl_DString *bufPtr)
{
    Tcl_DStringInit(bufPtr);
    Tcl_DStringSetLength(bufPtr, 2+TCL_INTEGER_SPACE);
    wsprintfA(Tcl_DStringValue(bufPtr), "cp%d", GetACP());
    Tcl_DStringSetLength(bufPtr, strlen(Tcl_DStringValue(bufPtr)));
    return Tcl_DStringValue(bufPtr);
}

/*
 *---------------------------------------------------------------------------
 *
 * TclpSetVariables --
 *
 *	Performs platform-specific interpreter initialization related to the
 *	tcl_platform and env variables, and other platform-specific things.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Sets "tcl_platform", and "env(HOME)" Tcl variables.
 *
 *----------------------------------------------------------------------
 */

void
TclpSetVariables(
    Tcl_Interp *interp)		/* Interp to initialize. */
{
    CONST char *ptr;
    char buffer[TCL_INTEGER_SPACE * 2];
    SYSTEM_INFO sysInfo;
    OemId *oemId;
    OSVERSIONINFOA osInfo;
    Tcl_DString ds;
    TCHAR szUserName[UNLEN+1];
    DWORD dwUserNameLen = sizeof(szUserName);

    Tcl_SetVar2Ex(interp, "tclDefaultLibrary", NULL,
	    TclGetProcessGlobalValue(&defaultLibraryDir), TCL_GLOBAL_ONLY);

    osInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFOA);
    GetVersionExA(&osInfo);

    oemId = (OemId *) &sysInfo;
    GetSystemInfo(&sysInfo);

    /*
     * Define the tcl_platform array.
     */

    Tcl_SetVar2(interp, "tcl_platform", "platform", "windows",
	    TCL_GLOBAL_ONLY);
    if (osInfo.dwPlatformId < NUMPLATFORMS) {
	Tcl_SetVar2(interp, "tcl_platform", "os",
		platforms[osInfo.dwPlatformId], TCL_GLOBAL_ONLY);
    }
    wsprintfA(buffer, "%d.%d", osInfo.dwMajorVersion, osInfo.dwMinorVersion);
    Tcl_SetVar2(interp, "tcl_platform", "osVersion", buffer, TCL_GLOBAL_ONLY);
    if (oemId->wProcessorArchitecture < NUMPROCESSORS) {
	Tcl_SetVar2(interp, "tcl_platform", "machine",
		processors[oemId->wProcessorArchitecture],
		TCL_GLOBAL_ONLY);
    }

#ifdef _DEBUG
    /*
     * The existence of the "debug" element of the tcl_platform array
     * indicates that this particular Tcl shell has been compiled with debug
     * information. Using "info exists tcl_platform(debug)" a Tcl script can
     * direct the interpreter to load debug versions of DLLs with the load
     * command.
     */

    Tcl_SetVar2(interp, "tcl_platform", "debug", "1",
	    TCL_GLOBAL_ONLY);
#endif

    /*
     * Set up the HOME environment variable from the HOMEDRIVE & HOMEPATH
     * environment variables, if necessary.
     */

    Tcl_DStringInit(&ds);
    ptr = Tcl_GetVar2(interp, "env", "HOME", TCL_GLOBAL_ONLY);
    if (ptr == NULL) {
	ptr = Tcl_GetVar2(interp, "env", "HOMEDRIVE", TCL_GLOBAL_ONLY);
	if (ptr != NULL) {
	    Tcl_DStringAppend(&ds, ptr, -1);
	}
	ptr = Tcl_GetVar2(interp, "env", "HOMEPATH", TCL_GLOBAL_ONLY);
	if (ptr != NULL) {
	    Tcl_DStringAppend(&ds, ptr, -1);
	}
	if (Tcl_DStringLength(&ds) > 0) {
	    Tcl_SetVar2(interp, "env", "HOME", Tcl_DStringValue(&ds),
		    TCL_GLOBAL_ONLY);
	} else {
	    Tcl_SetVar2(interp, "env", "HOME", "c:\\", TCL_GLOBAL_ONLY);
	}
    }

    /*
     * Initialize the user name from the environment first, since this is much
     * faster than asking the system.
     */

    Tcl_DStringInit(&ds);
    if (TclGetEnv("USERNAME", &ds) == NULL) {
	if (GetUserName(szUserName, &dwUserNameLen) != 0) {
	    Tcl_WinTCharToUtf(szUserName, (int) dwUserNameLen, &ds);
	}
    }
    Tcl_SetVar2(interp, "tcl_platform", "user", Tcl_DStringValue(&ds),
	    TCL_GLOBAL_ONLY);
    Tcl_DStringFree(&ds);
}

/*
 *----------------------------------------------------------------------
 *
 * TclpFindVariable --
 *
 *	Locate the entry in environ for a given name. On Unix this routine is
 *	case sensetive, on Windows this matches mioxed case.
 *
 * Results:
 *	The return value is the index in environ of an entry with the name
 *	"name", or -1 if there is no such entry. The integer at *lengthPtr is
 *	filled in with the length of name (if a matching entry is found) or
 *	the length of the environ array (if no matching entry is found).
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

int
TclpFindVariable(
    CONST char *name,		/* Name of desired environment variable
				 * (UTF-8). */
    int *lengthPtr)		/* Used to return length of name (for
				 * successful searches) or number of non-NULL
				 * entries in environ (for unsuccessful
				 * searches). */
{
    int i, length, result = -1;
    register CONST char *env, *p1, *p2;
    char *envUpper, *nameUpper;
    Tcl_DString envString;

    /*
     * Convert the name to all upper case for the case insensitive comparison.
     */

    length = strlen(name);
    nameUpper = (char *) ckalloc((unsigned) length+1);
    memcpy(nameUpper, name, (size_t) length+1);
    Tcl_UtfToUpper(nameUpper);

    Tcl_DStringInit(&envString);
    for (i = 0, env = environ[i]; env != NULL; i++, env = environ[i]) {
	/*
	 * Chop the env string off after the equal sign, then Convert the name
	 * to all upper case, so we do not have to convert all the characters
	 * after the equal sign.
	 */

	envUpper = Tcl_ExternalToUtfDString(NULL, env, -1, &envString);
	p1 = strchr(envUpper, '=');
	if (p1 == NULL) {
	    continue;
	}
	length = (int) (p1 - envUpper);
	Tcl_DStringSetLength(&envString, length+1);
	Tcl_UtfToUpper(envUpper);

	p1 = envUpper;
	p2 = nameUpper;
	for (; *p2 == *p1; p1++, p2++) {
	    /* NULL loop body. */
	}
	if ((*p1 == '=') && (*p2 == '\0')) {
	    *lengthPtr = length;
	    result = i;
	    goto done;
	}

	Tcl_DStringFree(&envString);
    }

    *lengthPtr = i;

  done:
    Tcl_DStringFree(&envString);
    ckfree(nameUpper);
    return result;
}

/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:
 */