/*
* 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 1.75.2.1 2009/07/01 14:05:19 patthoyts 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, *sysInfoPtr = &sysInfo;
OemId *oemId;
OSVERSIONINFOA osInfo;
Tcl_DString ds;
WCHAR szUserName[UNLEN+1];
DWORD cchUserNameLen = UNLEN;
Tcl_SetVar2Ex(interp, "tclDefaultLibrary", NULL,
TclGetProcessGlobalValue(&defaultLibraryDir), TCL_GLOBAL_ONLY);
osInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFOA);
GetVersionExA(&osInfo);
oemId = (OemId *) sysInfoPtr;
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.
* Note: cchUserNameLen is number of characters including nul terminator.
*/
Tcl_DStringInit(&ds);
if (TclGetEnv("USERNAME", &ds) == NULL) {
if (tclWinProcs->getUserName((LPTSTR)szUserName, &cchUserNameLen) != 0) {
int cbUserNameLen = cchUserNameLen - 1;
if (tclWinProcs->useWide) cbUserNameLen *= sizeof(WCHAR);
Tcl_WinTCharToUtf((LPTSTR)szUserName, cbUserNameLen, &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 sensitive, 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:
*/
|
