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/*
* tclWin32Dll.c --
*
* This file contains the DLL entry point which sets up the 32-to-16-bit
* thunking code for SynchSpawn if the library is running under Win32s.
*
* Copyright (c) 1995-1996 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* RCS: @(#) $Id: tclWin32Dll.c,v 1.1.2.3 1998/09/30 20:50:31 stanton Exp $
*/
#include "tclWinInt.h"
/*
* The following data structures are used when loading the thunking
* library for execing child processes under Win32s.
*/
typedef DWORD (WINAPI UT32PROC)(LPVOID lpBuff, DWORD dwUserDefined,
LPVOID *lpTranslationList);
typedef BOOL (WINAPI UTREGISTER)(HANDLE hModule, LPCSTR SixteenBitDLL,
LPCSTR InitName, LPCSTR ProcName, UT32PROC **ThirtyTwoBitThunk,
FARPROC UT32Callback, LPVOID Buff);
typedef VOID (WINAPI UTUNREGISTER)(HANDLE hModule);
/*
* The following variables keep track of information about this DLL
* on a per-instance basis. Each time this DLL is loaded, it gets its own
* new data segment with its own copy of all static and global information.
*/
static HINSTANCE hInstance; /* HINSTANCE of this DLL. */
static int platformId; /* Running under NT, 95, or Win32s? */
/*
* The following function tables are used to dispatch to either the
* wide-character or multi-byte versions of the operating system calls,
* depending on whether the Unicode calls are available.
*/
static TclWinProcs asciiProcs = {
0,
(BOOL (WINAPI *)(CONST TCHAR *, LPDCB)) BuildCommDCBA,
(TCHAR *(WINAPI *)(TCHAR *)) CharLowerA,
(BOOL (WINAPI *)(CONST TCHAR *, CONST TCHAR *, BOOL)) CopyFileA,
(BOOL (WINAPI *)(CONST TCHAR *, LPSECURITY_ATTRIBUTES)) CreateDirectoryA,
(HANDLE (WINAPI *)(CONST TCHAR *, DWORD, DWORD, SECURITY_ATTRIBUTES *,
DWORD, DWORD, HANDLE)) CreateFileA,
(BOOL (WINAPI *)(CONST TCHAR *, TCHAR *, LPSECURITY_ATTRIBUTES,
LPSECURITY_ATTRIBUTES, BOOL, DWORD, LPVOID, CONST TCHAR *,
LPSTARTUPINFOA, LPPROCESS_INFORMATION)) CreateProcessA,
(BOOL (WINAPI *)(CONST TCHAR *)) DeleteFileA,
(HANDLE (WINAPI *)(CONST TCHAR *, WIN32_FIND_DATAT *)) FindFirstFileA,
(BOOL (WINAPI *)(HANDLE, WIN32_FIND_DATAT *)) FindNextFileA,
(BOOL (WINAPI *)(WCHAR *, LPDWORD)) GetComputerNameA,
(DWORD (WINAPI *)(DWORD, WCHAR *)) GetCurrentDirectoryA,
(DWORD (WINAPI *)(CONST TCHAR *)) GetFileAttributesA,
(DWORD (WINAPI *)(CONST TCHAR *, DWORD nBufferLength, WCHAR *,
TCHAR **)) GetFullPathNameA,
(DWORD (WINAPI *)(HMODULE, WCHAR *, int)) GetModuleFileNameA,
(DWORD (WINAPI *)(CONST TCHAR *, WCHAR *, DWORD)) GetShortPathNameA,
(UINT (WINAPI *)(CONST TCHAR *, CONST TCHAR *, UINT uUnique,
WCHAR *)) GetTempFileNameA,
(DWORD (WINAPI *)(DWORD, WCHAR *)) GetTempPathA,
(BOOL (WINAPI *)(CONST TCHAR *, WCHAR *, DWORD, LPDWORD, LPDWORD, LPDWORD,
WCHAR *, DWORD)) GetVolumeInformationA,
(HINSTANCE (WINAPI *)(CONST TCHAR *)) LoadLibraryA,
(TCHAR (WINAPI *)(WCHAR *, CONST TCHAR *)) lstrcpyA,
(BOOL (WINAPI *)(CONST TCHAR *, CONST TCHAR *)) MoveFileA,
(BOOL (WINAPI *)(CONST TCHAR *)) RemoveDirectoryA,
(DWORD (WINAPI *)(CONST TCHAR *, CONST TCHAR *, CONST TCHAR *, DWORD,
WCHAR *, TCHAR **)) SearchPathA,
(BOOL (WINAPI *)(CONST TCHAR *)) SetCurrentDirectoryA,
(BOOL (WINAPI *)(CONST TCHAR *, DWORD)) SetFileAttributesA,
};
static TclWinProcs unicodeProcs = {
1,
(BOOL (WINAPI *)(CONST TCHAR *, LPDCB)) BuildCommDCBW,
(TCHAR *(WINAPI *)(TCHAR *)) CharLowerW,
(BOOL (WINAPI *)(CONST TCHAR *, CONST TCHAR *, BOOL)) CopyFileW,
(BOOL (WINAPI *)(CONST TCHAR *, LPSECURITY_ATTRIBUTES)) CreateDirectoryW,
(HANDLE (WINAPI *)(CONST TCHAR *, DWORD, DWORD, SECURITY_ATTRIBUTES *,
DWORD, DWORD, HANDLE)) CreateFileW,
(BOOL (WINAPI *)(CONST TCHAR *, TCHAR *, LPSECURITY_ATTRIBUTES,
LPSECURITY_ATTRIBUTES, BOOL, DWORD, LPVOID, CONST TCHAR *,
LPSTARTUPINFOA, LPPROCESS_INFORMATION)) CreateProcessW,
(BOOL (WINAPI *)(CONST TCHAR *)) DeleteFileW,
(HANDLE (WINAPI *)(CONST TCHAR *, WIN32_FIND_DATAT *)) FindFirstFileW,
(BOOL (WINAPI *)(HANDLE, WIN32_FIND_DATAT *)) FindNextFileW,
(BOOL (WINAPI *)(WCHAR *, LPDWORD)) GetComputerNameW,
(DWORD (WINAPI *)(DWORD, WCHAR *)) GetCurrentDirectoryW,
(DWORD (WINAPI *)(CONST TCHAR *)) GetFileAttributesW,
(DWORD (WINAPI *)(CONST TCHAR *, DWORD nBufferLength, WCHAR *,
TCHAR **)) GetFullPathNameW,
(DWORD (WINAPI *)(HMODULE, WCHAR *, int)) GetModuleFileNameW,
(DWORD (WINAPI *)(CONST TCHAR *, WCHAR *, DWORD)) GetShortPathNameW,
(UINT (WINAPI *)(CONST TCHAR *, CONST TCHAR *, UINT uUnique,
WCHAR *)) GetTempFileNameW,
(DWORD (WINAPI *)(DWORD, WCHAR *)) GetTempPathW,
(BOOL (WINAPI *)(CONST TCHAR *, WCHAR *, DWORD, LPDWORD, LPDWORD, LPDWORD,
WCHAR *, DWORD)) GetVolumeInformationW,
(HINSTANCE (WINAPI *)(CONST TCHAR *)) LoadLibraryW,
(TCHAR (WINAPI *)(WCHAR *, CONST TCHAR *)) lstrcpyW,
(BOOL (WINAPI *)(CONST TCHAR *, CONST TCHAR *)) MoveFileW,
(BOOL (WINAPI *)(CONST TCHAR *)) RemoveDirectoryW,
(DWORD (WINAPI *)(CONST TCHAR *, CONST TCHAR *, CONST TCHAR *, DWORD,
WCHAR *, TCHAR **)) SearchPathW,
(BOOL (WINAPI *)(CONST TCHAR *)) SetCurrentDirectoryW,
(BOOL (WINAPI *)(CONST TCHAR *, DWORD)) SetFileAttributesW,
};
TclWinProcs *tclWinProcs;
static Tcl_Encoding tclWinTCharEncoding;
/*
* The following declaration is for the VC++ DLL entry point.
*/
BOOL APIENTRY DllMain(HINSTANCE hInst, DWORD reason,
LPVOID reserved);
#ifdef __WIN32__
#ifndef STATIC_BUILD
/*
*----------------------------------------------------------------------
*
* DllEntryPoint --
*
* This wrapper function is used by Borland to invoke the
* initialization code for Tcl. It simply calls the DllMain
* routine.
*
* Results:
* See DllMain.
*
* Side effects:
* See DllMain.
*
*----------------------------------------------------------------------
*/
BOOL APIENTRY
DllEntryPoint(hInst, reason, reserved)
HINSTANCE hInst; /* Library instance handle. */
DWORD reason; /* Reason this function is being called. */
LPVOID reserved; /* Not used. */
{
return DllMain(hInst, reason, reserved);
}
/*
*----------------------------------------------------------------------
*
* DllMain --
*
* This routine is called by the VC++ C run time library init
* code, or the DllEntryPoint routine. It is responsible for
* initializing various dynamically loaded libraries.
*
* Results:
* TRUE on sucess, FALSE on failure.
*
* Side effects:
* Establishes 32-to-16 bit thunk and initializes sockets library.
*
*----------------------------------------------------------------------
*/
BOOL APIENTRY
DllMain(hInst, reason, reserved)
HINSTANCE hInst; /* Library instance handle. */
DWORD reason; /* Reason this function is being called. */
LPVOID reserved; /* Not used. */
{
switch (reason) {
case DLL_PROCESS_ATTACH:
if (hInstance != NULL) {
/*
* Prevents DLL from being loaded multiple times under Win32s,
* since all copies of the DLL share the same data segment and
* Tcl isn't set up to handle that. Under NT or 95, each time
* the DLL is loaded, it gets its own private copy of the data
* segment.
*/
return FALSE;
}
TclWinInit(hInst);
return TRUE;
case DLL_PROCESS_DETACH:
if (hInst == hInstance) {
Tcl_Finalize();
}
break;
}
return TRUE;
}
#endif /* !STATIC_BUILD */
#endif /* __WIN32__ */
/*
*----------------------------------------------------------------------
*
* TclWinSynchSpawn --
*
* 32-bit entry point to the 16-bit SynchSpawn code.
*
* Results:
* 1 on success, 0 on failure.
*
* Side effects:
* Spawns a command and waits for it to complete.
*
*----------------------------------------------------------------------
*/
int
TclWinSynchSpawn(void *args, int type, void **trans, Tcl_Pid *pidPtr)
{
HINSTANCE hKernel;
UTREGISTER *utRegisterProc;
UTUNREGISTER *utUnRegisterProc;
UT32PROC *ut32Proc;
char buffer[] = "TCL16xx.DLL";
int result;
hKernel = LoadLibraryA("kernel32.dll");
if (hKernel == NULL) {
return 0;
}
/*
* Load the Universal Thunking routines from kernel32.dll.
*/
utRegisterProc = (UTREGISTER *) GetProcAddress(hKernel, "UTRegister");
utUnRegisterProc = (UTUNREGISTER *) GetProcAddress(hKernel, "UTUnRegister");
if ((utRegisterProc == NULL) || (utUnRegisterProc == NULL)) {
result = 0;
goto done;
}
/*
* Construct the complete name of tcl16xx.dll.
*/
buffer[5] = '0' + TCL_MAJOR_VERSION;
buffer[6] = '0' + TCL_MINOR_VERSION;
/*
* Register the Tcl thunk.
*/
if ((*utRegisterProc)(hInstance, buffer, NULL, "UTProc", &ut32Proc,
NULL, NULL) == FALSE) {
result = 0;
goto done;
}
if (ut32Proc != NULL) {
/*
* Invoke the thunk.
*/
*pidPtr = 0;
(*ut32Proc)(args, type, trans);
result = 1;
} else {
/*
* The 16-bit thunking DLL wasn't found. Return error code that
* indicates this problem.
*/
result = 0;
}
(*utUnRegisterProc)(hInstance);
done:
FreeLibrary(hKernel);
return result;
}
/*
*----------------------------------------------------------------------
*
* TclWinGetTclInstance --
*
* Retrieves the global library instance handle.
*
* Results:
* Returns the global library instance handle.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
HINSTANCE
TclWinGetTclInstance()
{
return hInstance;
}
/*
*----------------------------------------------------------------------
*
* TclWinInit --
*
* This function initializes the internal state of the tcl library.
*
* Results:
* None.
*
* Side effects:
* Initializes the 16-bit thunking library, and the tclPlatformId
* variable.
*
*----------------------------------------------------------------------
*/
void
TclWinInit(hInst)
HINSTANCE hInst; /* Library instance handle. */
{
OSVERSIONINFO os;
hInstance = hInst;
os.dwOSVersionInfoSize = sizeof(os);
GetVersionEx(&os);
platformId = os.dwPlatformId;
/*
* The following code stops Windows 3.x 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, the system doesn't automatically put up dialogs
* when the above operations fail.
*/
if (platformId == VER_PLATFORM_WIN32s) {
SetErrorMode(SetErrorMode(0) | SEM_FAILCRITICALERRORS);
}
tclWinProcs = &asciiProcs;
}
/*
*----------------------------------------------------------------------
*
* TclWinGetPlatformId --
*
* Determines whether running under NT, 95, or Win32s, to allow
* runtime conditional code.
*
* Results:
* The return value is one of:
* VER_PLATFORM_WIN32s Win32s on Windows 3.1.
* VER_PLATFORM_WIN32_WINDOWS Win32 on Windows 95.
* VER_PLATFORM_WIN32_NT Win32 on Windows NT
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
TclWinGetPlatformId()
{
return platformId;
}
/*
*-------------------------------------------------------------------------
*
* TclWinNoBackslash --
*
* We're always iterating through a string in Windows, changing the
* backslashes to slashes for use in Tcl.
*
* Results:
* All backslashes in given string are changes to slashes.
*
* Side effects:
* None.
*
*-------------------------------------------------------------------------
*/
char *
TclWinNoBackslash(
char *path) /* String to change. */
{
char *p;
for (p = path; *p != '\0'; p++) {
if (*p == '\\') {
*p = '/';
}
}
return path;
}
/*
*----------------------------------------------------------------------
*
* TclpCheckStackSpace --
*
* Detect if we are about to blow the stack. Called before an
* evaluation can happen when nesting depth is checked.
*
* Results:
* 1 if there is enough stack space to continue; 0 if not.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
TclpCheckStackSpace()
{
/*
* We can recurse only if there is at least TCL_WIN_STACK_THRESHOLD
* bytes of stack space left. alloca() is cheap on windows; basically
* it just subtracts from the stack pointer causing the OS to throw an
* exception if the stack pointer is set below the bottom of the stack.
*/
try {
alloca(TCL_WIN_STACK_THRESHOLD);
return 1;
} except (1) {}
return 0;
}
/*
*----------------------------------------------------------------------
*
* TclWinGetPlatform --
*
* This is a kludge that allows the test library to get access
* the internal tclPlatform variable.
*
* Results:
* Returns a pointer to the tclPlatform variable.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
TclPlatformType *
TclWinGetPlatform()
{
return &tclPlatform;
}
/*
*---------------------------------------------------------------------------
*
* TclWinSetInterfaces --
*
* A helper proc that allows the test library to change the
* tclWinProcs structure to dispatch to either the wide-character
* or multi-byte versions of the operating system calls, depending
* on whether Unicode is the system encoding.
*
* Results:
* None.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
void
TclWinSetInterfaces(
int wide) /* Non-zero to use wide interfaces, 0
* otherwise. */
{
Tcl_FreeEncoding(tclWinTCharEncoding);
if (wide) {
tclWinProcs = &unicodeProcs;
tclWinTCharEncoding = Tcl_GetEncoding(NULL, "unicode");
} else {
tclWinProcs = &asciiProcs;
tclWinTCharEncoding = NULL;
}
}
/*
*---------------------------------------------------------------------------
*
* Tcl_WinUtfToTChar, Tcl_WinTCharToUtf --
*
* Convert between UTF-8 and Unicode when running Windows NT or
* the current ANSI code page when running Windows 95.
*
* On Mac, Unix, and Windows 95, all strings exchanged between Tcl
* and the OS are "char" oriented. We need only one Tcl_Encoding to
* convert between UTF-8 and the system's native encoding. We use
* NULL to represent that encoding.
*
* On NT, some strings exchanged between Tcl and the OS are "char"
* oriented, while others are in Unicode. We need two Tcl_Encodings
* depending on whether we are targeting a "char" or Unicode
* interface.
*
* Calling Tcl_UtfToExternal() or Tcl_ExternalToUtf() with an
* encoding of NULL should always used to convert between UTF-8
* and the system's "char" oriented encoding. The following two
* functions are used in Windows-specific code to convert between
* UTF-8 and Unicode strings (NT) or "char" strings(95). This saves
* you the trouble of writing the following type of fragment over and
* over:
*
* if (running NT) {
* encoding <- Tcl_GetEncoding("unicode");
* nativeBuffer <- UtfToExternal(encoding, utfBuffer);
* Tcl_FreeEncoding(encoding);
* } else {
* nativeBuffer <- UtfToExternal(NULL, utfBuffer);
* }
*
* By convention, in Windows a TCHAR is a character in the ANSI code
* page on Windows 95, a Unicode character on Windows NT. If you
* plan on targeting a Unicode interfaces when running on NT and a
* "char" oriented interface while running on 95, these functions
* should be used. If you plan on targetting the same "char"
* oriented function on both 95 and NT, use Tcl_UtfToExternal()
* with an encoding of NULL.
*
* Results:
* The result is a pointer to the string in the desired target
* encoding. Storage for the result string is allocated in
* dsPtr; the caller must call Tcl_DStringFree() when the result
* is no longer needed.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
TCHAR *
Tcl_WinUtfToTChar(string, len, dsPtr)
CONST char *string; /* Source string in UTF-8. */
int len; /* Source string length in bytes, or < 0 for
* strlen(). */
Tcl_DString *dsPtr; /* Uninitialized or free DString in which
* the converted string is stored. */
{
return (TCHAR *) Tcl_UtfToExternalDString(tclWinTCharEncoding,
string, len, dsPtr);
}
char *
Tcl_WinTCharToUtf(string, len, dsPtr)
CONST TCHAR *string; /* Source string in Unicode when running
* NT, ANSI when running 95. */
int len; /* Source string length in bytes, or < 0 for
* platform-specific string length. */
Tcl_DString *dsPtr; /* Uninitialized or free DString in which
* the converted string is stored. */
{
return Tcl_ExternalToUtfDString(tclWinTCharEncoding,
(CONST char *) string, len, dsPtr);
}
|