/*
* tclWin32Dll.c --
*
* This file contains the DLL entry point.
*
* Copyright (c) 1995-1996 Sun Microsystems, Inc.
* Copyright (c) 1998-2000 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: tclWin32Dll.c,v 1.24.2.1 2003/04/14 15:45:59 vincentdarley Exp $
*/
#include "tkWinInt.h"
typedef DWORD (WINAPI * UT32PROC)(LPVOID lpBuff, DWORD dwUserDefined,
LPVOID *lpTranslationList);
typedef BOOL (WINAPI * PUTREGISTER)(HANDLE hModule, LPCSTR SixteenBitDLL,
LPCSTR InitName, LPCSTR ProcName, UT32PROC* ThirtyTwoBitThunk,
FARPROC UT32Callback, LPVOID Buff);
typedef VOID (WINAPI * PUTUNREGISTER)(HANDLE hModule);
static PUTUNREGISTER UTUnRegister = NULL;
static int tclProcessesAttached = 0;
/*
* 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, or 95/98? */
#if defined(HAVE_NO_SEH) && defined(TCL_MEM_DEBUG)
static void *INITIAL_ESP,
*INITIAL_EBP,
*INITIAL_HANDLER,
*RESTORED_ESP,
*RESTORED_EBP,
*RESTORED_HANDLER;
#endif /* HAVE_NO_SEH && TCL_MEM_DEBUG */
/*
* 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,
/*
* The three NULL function pointers will only be set when
* Tcl_FindExecutable is called. If you don't ever call that
* function, the application will crash whenever WinTcl tries to call
* functions through these null pointers. That is not a bug in Tcl
* -- Tcl_FindExecutable is obligatory in recent Tcl releases.
*/
NULL,
NULL,
(int (__cdecl*)(CONST TCHAR *, struct _utimbuf *)) _utime,
NULL,
NULL,
};
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,
/*
* The three NULL function pointers will only be set when
* Tcl_FindExecutable is called. If you don't ever call that
* function, the application will crash whenever WinTcl tries to call
* functions through these null pointers. That is not a bug in Tcl
* -- Tcl_FindExecutable is obligatory in recent Tcl releases.
*/
NULL,
NULL,
(int (__cdecl*)(CONST TCHAR *, struct _utimbuf *)) _wutime,
NULL,
NULL,
};
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);
/*
* The following structure and linked list is to allow us to map between
* volume mount points and drive letters on the fly (no Win API exists
* for this).
*/
typedef struct MountPointMap {
CONST WCHAR* volumeName; /* Native wide string volume name */
char driveLetter; /* Drive letter corresponding to
* the volume name. */
struct MountPointMap* nextPtr; /* Pointer to next structure in list,
* or NULL */
} MountPointMap;
/*
* This is the head of the linked list, which is protected by the
* mutex which follows, for thread-enabled builds.
*/
MountPointMap *driveLetterLookup = NULL;
TCL_DECLARE_MUTEX(mountPointMap)
/* We will need this below */
extern Tcl_FSDupInternalRepProc NativeDupInternalRep;
#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:
TclWinInit(hInst);
return TRUE;
case DLL_PROCESS_DETACH:
if (hInst == hInstance) {
Tcl_Finalize();
}
break;
}
return TRUE;
}
#endif /* !STATIC_BUILD */
#endif /* __WIN32__ */
/*
*----------------------------------------------------------------------
*
* 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 tclPlatformId variable.
*
*----------------------------------------------------------------------
*/
void
TclWinInit(hInst)
HINSTANCE hInst; /* Library instance handle. */
{
OSVERSIONINFO os;
hInstance = hInst;
os.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
GetVersionEx(&os);
platformId = os.dwPlatformId;
/*
* We no longer support Win32s, so just in case someone manages to
* get a runtime there, make sure they know that.
*/
if (platformId == VER_PLATFORM_WIN32s) {
panic("Win32s is not a supported platform");
}
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. (not supported)
* VER_PLATFORM_WIN32_WINDOWS Win32 on Windows 95.
* VER_PLATFORM_WIN32_NT Win32 on Windows NT
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
TclWinGetPlatformId()
{
return platformId;
}
#if 0
/*
*-------------------------------------------------------------------------
*
* 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 changed 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()
{
int retval = 0;
/*
* 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.
*/
#ifdef HAVE_NO_SEH
# ifdef TCL_MEM_DEBUG
__asm__ __volatile__ (
"movl %%esp, %0" "\n\t"
"movl %%ebp, %1" "\n\t"
"movl %%fs:0, %2" "\n\t"
: "=m"(INITIAL_ESP),
"=m"(INITIAL_EBP),
"=r"(INITIAL_HANDLER) );
# endif /* TCL_MEM_DEBUG */
__asm__ __volatile__ (
"pushl %ebp" "\n\t"
"pushl $__except_checkstackspace_handler" "\n\t"
"pushl %fs:0" "\n\t"
"movl %esp, %fs:0");
#else
__try {
#endif /* HAVE_NO_SEH */
#ifdef HAVE_ALLOCA_GCC_INLINE
__asm__ __volatile__ (
"movl %0, %%eax" "\n\t"
"call __alloca" "\n\t"
:
: "i"(TCL_WIN_STACK_THRESHOLD)
: "%eax");
#else
alloca(TCL_WIN_STACK_THRESHOLD);
#endif /* HAVE_ALLOCA_GCC_INLINE */
retval = 1;
#ifdef HAVE_NO_SEH
__asm__ __volatile__ (
"movl %%fs:0, %%esp" "\n\t"
"jmp checkstackspace_pop" "\n"
"checkstackspace_reentry:" "\n\t"
"movl %%fs:0, %%eax" "\n\t"
"movl 0x8(%%eax), %%esp" "\n\t"
"movl 0x8(%%esp), %%ebp" "\n"
"checkstackspace_pop:" "\n\t"
"movl (%%esp), %%eax" "\n\t"
"movl %%eax, %%fs:0" "\n\t"
"add $12, %%esp" "\n\t"
:
:
: "%eax");
# ifdef TCL_MEM_DEBUG
__asm__ __volatile__ (
"movl %%esp, %0" "\n\t"
"movl %%ebp, %1" "\n\t"
"movl %%fs:0, %2" "\n\t"
: "=m"(RESTORED_ESP),
"=m"(RESTORED_EBP),
"=r"(RESTORED_HANDLER) );
if (INITIAL_ESP != RESTORED_ESP)
panic("ESP restored incorrectly");
if (INITIAL_EBP != RESTORED_EBP)
panic("EBP restored incorrectly");
if (INITIAL_HANDLER != RESTORED_HANDLER)
panic("HANDLER restored incorrectly");
# endif /* TCL_MEM_DEBUG */
#else
} __except (EXCEPTION_EXECUTE_HANDLER) {}
#endif /* HAVE_NO_SEH */
/*
* Avoid using control flow statements in the SEH guarded block!
*/
return retval;
}
#ifdef HAVE_NO_SEH
static
__attribute__ ((cdecl))
EXCEPTION_DISPOSITION
_except_checkstackspace_handler(
struct _EXCEPTION_RECORD *ExceptionRecord,
void *EstablisherFrame,
struct _CONTEXT *ContextRecord,
void *DispatcherContext)
{
__asm__ __volatile__ (
"jmp checkstackspace_reentry");
/* Nuke compiler warning about unused static function */
_except_checkstackspace_handler(NULL, NULL, NULL, NULL);
return 0; /* Function does not return */
}
#endif /* HAVE_NO_SEH */
/*
*----------------------------------------------------------------------
*
* 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;
}
#endif
/*
*---------------------------------------------------------------------------
*
* 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.
*
* As well as this, we can also try to load in some additional
* procs which may/may not be present depending on the current
* Windows version (e.g. Win95 will not have the procs below).
*
* 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");
if (tclWinProcs->getFileAttributesExProc == NULL) {
HINSTANCE hInstance = LoadLibraryA("kernel32");
if (hInstance != NULL) {
tclWinProcs->getFileAttributesExProc =
(BOOL (WINAPI *)(CONST TCHAR *, GET_FILEEX_INFO_LEVELS,
LPVOID)) GetProcAddress(hInstance, "GetFileAttributesExW");
tclWinProcs->createHardLinkProc =
(BOOL (WINAPI *)(CONST TCHAR *, CONST TCHAR*,
LPSECURITY_ATTRIBUTES)) GetProcAddress(hInstance,
"CreateHardLinkW");
tclWinProcs->findFirstFileExProc =
(HANDLE (WINAPI *)(CONST TCHAR*, UINT,
LPVOID, UINT, LPVOID, DWORD)) GetProcAddress(hInstance,
"FindFirstFileExW");
tclWinProcs->getVolumeNameForVMPProc =
(BOOL (WINAPI *)(CONST TCHAR*, TCHAR*,
DWORD)) GetProcAddress(hInstance,
"GetVolumeNameForVolumeMountPointW");
FreeLibrary(hInstance);
}
}
} else {
tclWinProcs = &asciiProcs;
tclWinTCharEncoding = NULL;
if (tclWinProcs->getFileAttributesExProc == NULL) {
HINSTANCE hInstance = LoadLibraryA("kernel32");
if (hInstance != NULL) {
tclWinProcs->getFileAttributesExProc =
(BOOL (WINAPI *)(CONST TCHAR *, GET_FILEEX_INFO_LEVELS,
LPVOID)) GetProcAddress(hInstance, "GetFileAttributesExA");
tclWinProcs->createHardLinkProc =
(BOOL (WINAPI *)(CONST TCHAR *, CONST TCHAR*,
LPSECURITY_ATTRIBUTES)) GetProcAddress(hInstance,
"CreateHardLinkA");
tclWinProcs->findFirstFileExProc =
(HANDLE (WINAPI *)(CONST TCHAR*, UINT,
LPVOID, UINT, LPVOID, DWORD)) GetProcAddress(hInstance,
"FindFirstFileExA");
tclWinProcs->getVolumeNameForVMPProc =
(BOOL (WINAPI *)(CONST TCHAR*, TCHAR*,
DWORD)) GetProcAddress(hInstance,
"GetVolumeNameForVolumeMountPointA");
FreeLibrary(hInstance);
}
}
}
}
/*
*---------------------------------------------------------------------------
*
* TclWinResetInterfaceEncodings --
*
* Called during finalization to free up any encodings we use.
* The tclWinProcs-> look up table is still ok to use after
* this call, provided no encoding conversion is required.
*
* We also clean up any memory allocated in our mount point
* map which is used to follow certain kinds of symlinks.
* That code should never be used once encodings are taken
* down.
*
* Results:
* None.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
void
TclWinResetInterfaceEncodings()
{
MountPointMap *dlIter, *dlIter2;
if (tclWinTCharEncoding != NULL) {
Tcl_FreeEncoding(tclWinTCharEncoding);
tclWinTCharEncoding = NULL;
}
/* Clean up the mount point map */
Tcl_MutexLock(&mountPointMap);
dlIter = driveLetterLookup;
while (dlIter != NULL) {
dlIter2 = dlIter->nextPtr;
ckfree((char*)dlIter->volumeName);
ckfree((char*)dlIter);
dlIter = dlIter2;
}
Tcl_MutexUnlock(&mountPointMap);
}
/*
*---------------------------------------------------------------------------
*
* TclWinResetInterfaces --
*
* Called during finalization to reset us to a safe state for reuse.
* After this call, it is best not to use the tclWinProcs-> look
* up table since it is likely to be different to what is expected.
*
* Results:
* None.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
void
TclWinResetInterfaces()
{
tclWinProcs = &asciiProcs;
}
/*
*--------------------------------------------------------------------
*
* TclWinDriveLetterForVolMountPoint
*
* Unfortunately, Windows provides no easy way at all to get hold
* of the drive letter for a volume mount point, but we need that
* information to understand paths correctly. So, we have to
* build an associated array to find these correctly, and allow
* quick and easy lookup from volume mount points to drive letters.
*
* We assume here that we are running on a system for which the wide
* character interfaces are used, which is valid for Win 2000 and WinXP
* which are the only systems on which this function will ever be called.
*
* Result: the drive letter, or -1 if no drive letter corresponds to
* the given mount point.
*
*--------------------------------------------------------------------
*/
char
TclWinDriveLetterForVolMountPoint(CONST WCHAR *mountPoint)
{
MountPointMap *dlIter, *dlPtr2;
WCHAR Target[55]; /* Target of mount at mount point */
WCHAR drive[4] = { L'A', L':', L'\\', L'\0' };
/*
* Detect the volume mounted there. Unfortunately, there is no
* simple way to map a unique volume name to a DOS drive letter.
* So, we have to build an associative array.
*/
Tcl_MutexLock(&mountPointMap);
dlIter = driveLetterLookup;
while (dlIter != NULL) {
if (wcscmp(dlIter->volumeName, mountPoint) == 0) {
/*
* We need to check whether this information is
* still valid, since either the user or various
* programs could have adjusted the mount points on
* the fly.
*/
drive[0] = L'A' + (dlIter->driveLetter - 'A');
/* Try to read the volume mount point and see where it points */
if ((*tclWinProcs->getVolumeNameForVMPProc)((TCHAR*)drive,
(TCHAR*)Target, 55) != 0) {
if (wcscmp((WCHAR*)dlIter->volumeName, Target) == 0) {
/* Nothing has changed */
Tcl_MutexUnlock(&mountPointMap);
return dlIter->driveLetter;
}
}
/*
* If we reach here, unfortunately, this mount point is
* no longer valid at all
*/
if (driveLetterLookup == dlIter) {
dlPtr2 = dlIter;
driveLetterLookup = dlIter->nextPtr;
} else {
for (dlPtr2 = driveLetterLookup;
dlPtr2 != NULL; dlPtr2 = dlPtr2->nextPtr) {
if (dlPtr2->nextPtr == dlIter) {
dlPtr2->nextPtr = dlIter->nextPtr;
dlPtr2 = dlIter;
break;
}
}
}
/* Now dlPtr2 points to the structure to free */
ckfree((char*)dlPtr2->volumeName);
ckfree((char*)dlPtr2);
/*
* Restart the loop --- we could try to be clever
* and continue half way through, but the logic is a
* bit messy, so it's cleanest just to restart
*/
dlIter = driveLetterLookup;
continue;
}
dlIter = dlIter->nextPtr;
}
/* We couldn't find it, so we must iterate over the letters */
for (drive[0] = L'A'; drive[0] <= L'Z'; drive[0]++) {
/* Try to read the volume mount point and see where it points */
if ((*tclWinProcs->getVolumeNameForVMPProc)((TCHAR*)drive,
(TCHAR*)Target, 55) != 0) {
int alreadyStored = 0;
for (dlIter = driveLetterLookup; dlIter != NULL;
dlIter = dlIter->nextPtr) {
if (wcscmp((WCHAR*)dlIter->volumeName, Target) == 0) {
alreadyStored = 1;
break;
}
}
if (!alreadyStored) {
dlPtr2 = (MountPointMap*) ckalloc(sizeof(MountPointMap));
dlPtr2->volumeName = NativeDupInternalRep(Target);
dlPtr2->driveLetter = 'A' + (drive[0] - L'A');
dlPtr2->nextPtr = driveLetterLookup;
driveLetterLookup = dlPtr2;
}
}
}
/* Try again */
for (dlIter = driveLetterLookup; dlIter != NULL;
dlIter = dlIter->nextPtr) {
if (wcscmp(dlIter->volumeName, mountPoint) == 0) {
Tcl_MutexUnlock(&mountPointMap);
return dlIter->driveLetter;
}
}
/*
* The volume doesn't appear to correspond to a drive letter -- we
* remember that fact and store '-1' so we don't have to look it
* up each time.
*/
dlPtr2 = (MountPointMap*) ckalloc(sizeof(MountPointMap));
dlPtr2->volumeName = NativeDupInternalRep((ClientData)mountPoint);
dlPtr2->driveLetter = -1;
dlPtr2->nextPtr = driveLetterLookup;
driveLetterLookup = dlPtr2;
Tcl_MutexUnlock(&mountPointMap);
return -1;
}
/*
*---------------------------------------------------------------------------
*
* 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_Encoding
* APIs 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);
}