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Sweden-Number/dlls/winedos/dosvm.c

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/*
* DOS Virtual Machine
*
* Copyright 1998 Ove Kåven
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Note: This code hasn't been completely cleaned up yet.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#include <sys/types.h>
#include "wine/winbase16.h"
#include "wine/exception.h"
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winnt.h"
#include "wincon.h"
#include "msdos.h"
#include "file.h"
#include "miscemu.h"
#include "dosexe.h"
#include "dosvm.h"
#include "stackframe.h"
#include "wine/debug.h"
#include "msvcrt/excpt.h"
WINE_DEFAULT_DEBUG_CHANNEL(int);
WINE_DECLARE_DEBUG_CHANNEL(module);
WINE_DECLARE_DEBUG_CHANNEL(relay);
WORD DOSVM_psp = 0;
WORD DOSVM_retval = 0;
const struct DPMI_segments *DOSVM_dpmi_segments = NULL;
#ifdef MZ_SUPPORTED
#ifdef HAVE_SYS_VM86_H
# include <sys/vm86.h>
#endif
#ifdef HAVE_SYS_MMAN_H
# include <sys/mman.h>
#endif
#define IF_CLR(ctx) ((ctx)->EFlags &= ~VIF_MASK)
#define IF_SET(ctx) ((ctx)->EFlags |= VIF_MASK)
#define IF_ENABLED(ctx) ((ctx)->EFlags & VIF_MASK)
#define SET_PEND(ctx) ((ctx)->EFlags |= VIP_MASK)
#define CLR_PEND(ctx) ((ctx)->EFlags &= ~VIP_MASK)
#define IS_PEND(ctx) ((ctx)->EFlags & VIP_MASK)
#undef TRY_PICRETURN
typedef struct _DOSEVENT {
int irq,priority;
DOSRELAY relay;
void *data;
struct _DOSEVENT *next;
} DOSEVENT, *LPDOSEVENT;
static CRITICAL_SECTION qcrit = CRITICAL_SECTION_INIT("DOSVM");
static struct _DOSEVENT *pending_event, *current_event;
static int sig_sent;
static HANDLE event_notifier;
static CONTEXT86 *current_context;
static int DOSVM_SimulateInt( int vect, CONTEXT86 *context, BOOL inwine )
{
FARPROC16 handler=DOSVM_GetRMHandler(vect);
/* check for our real-mode hooks */
if (vect==0x31) {
if (context->SegCs==DOSVM_dpmi_segments->wrap_seg) {
/* exit from real-mode wrapper */
return -1;
}
/* we could probably move some other dodgy stuff here too from dpmi.c */
}
/* check if the call is from our fake BIOS interrupt stubs */
if ((context->SegCs==0xf000) && !inwine) {
if (vect != (context->Eip/4)) {
TRACE("something fishy going on here (interrupt stub is %02lx)\n", context->Eip/4);
}
TRACE("builtin interrupt %02x has been branched to\n", vect);
DOSVM_RealModeInterrupt(vect, context);
}
/* check if the call goes to an unhooked interrupt */
else if (SELECTOROF(handler)==0xf000) {
/* if so, call it directly */
TRACE("builtin interrupt %02x has been invoked (through vector %02x)\n", OFFSETOF(handler)/4, vect);
DOSVM_RealModeInterrupt(OFFSETOF(handler)/4, context);
}
/* the interrupt is hooked, simulate interrupt in DOS space */
else {
WORD*stack= PTR_REAL_TO_LIN( context->SegSs, context->Esp );
WORD flag=LOWORD(context->EFlags);
TRACE_(int)("invoking hooked interrupt %02x at %04x:%04x\n", vect,
SELECTOROF(handler), OFFSETOF(handler));
if (IF_ENABLED(context)) flag|=IF_MASK;
else flag&=~IF_MASK;
*(--stack)=flag;
*(--stack)=context->SegCs;
*(--stack)=LOWORD(context->Eip);
context->Esp-=6;
context->SegCs=SELECTOROF(handler);
context->Eip=OFFSETOF(handler);
IF_CLR(context);
}
return 0;
}
#define SHOULD_PEND(x) \
(x && ((!current_event) || (x->priority < current_event->priority)))
static void DOSVM_SendQueuedEvent(CONTEXT86 *context)
{
LPDOSEVENT event = pending_event;
if (SHOULD_PEND(event)) {
/* remove from "pending" list */
pending_event = event->next;
/* process event */
if (event->irq>=0) {
/* it's an IRQ, move it to "current" list */
event->next = current_event;
current_event = event;
TRACE("dispatching IRQ %d\n",event->irq);
/* note that if DOSVM_SimulateInt calls an internal interrupt directly,
* current_event might be cleared (and event freed) in this very call! */
DOSVM_SimulateInt((event->irq<8)?(event->irq+8):(event->irq-8+0x70),context,TRUE);
} else {
/* callback event */
TRACE("dispatching callback event\n");
(*event->relay)(context,event->data);
free(event);
}
}
if (!SHOULD_PEND(pending_event)) {
TRACE("clearing Pending flag\n");
CLR_PEND(context);
}
}
static void DOSVM_SendQueuedEvents(CONTEXT86 *context)
{
/* we will send all queued events as long as interrupts are enabled,
* but IRQ events will disable interrupts again */
while (IS_PEND(context) && IF_ENABLED(context))
DOSVM_SendQueuedEvent(context);
}
/***********************************************************************
* QueueEvent (WINEDOS.@)
*/
void WINAPI DOSVM_QueueEvent( INT irq, INT priority, DOSRELAY relay, LPVOID data)
{
LPDOSEVENT event, cur, prev;
if (current_context) {
EnterCriticalSection(&qcrit);
event = malloc(sizeof(DOSEVENT));
if (!event) {
ERR("out of memory allocating event entry\n");
return;
}
event->irq = irq; event->priority = priority;
event->relay = relay; event->data = data;
/* insert event into linked list, in order *after*
* all earlier events of higher or equal priority */
cur = pending_event; prev = NULL;
while (cur && cur->priority<=priority) {
prev = cur;
cur = cur->next;
}
event->next = cur;
if (prev) prev->next = event;
else pending_event = event;
/* alert the vm86 about the new event */
if (!sig_sent) {
TRACE("new event queued, signalling (time=%ld)\n", GetTickCount());
kill(dosvm_pid,SIGUSR2);
sig_sent++;
} else {
TRACE("new event queued (time=%ld)\n", GetTickCount());
}
/* Wake up DOSVM_Wait so that it can serve pending events. */
SetEvent(event_notifier);
LeaveCriticalSection(&qcrit);
} else {
/* DOS subsystem not running */
/* (this probably means that we're running a win16 app
* which uses DPMI to thunk down to DOS services) */
if (irq<0) {
/* callback event, perform it with dummy context */
CONTEXT86 context;
memset(&context,0,sizeof(context));
(*relay)(&context,data);
} else {
ERR("IRQ without DOS task: should not happen\n");
}
}
}
static void DOSVM_ProcessConsole(void)
{
INPUT_RECORD msg;
DWORD res;
BYTE scan;
if (ReadConsoleInputA(GetStdHandle(STD_INPUT_HANDLE),&msg,1,&res)) {
switch (msg.EventType) {
case KEY_EVENT:
scan = msg.Event.KeyEvent.wVirtualScanCode;
if (!msg.Event.KeyEvent.bKeyDown) scan |= 0x80;
/* check whether extended bit is set,
* and if so, queue the extension prefix */
if (msg.Event.KeyEvent.dwControlKeyState & ENHANCED_KEY) {
DOSVM_Int09SendScan(0xE0,0);
}
DOSVM_Int09SendScan(scan,msg.Event.KeyEvent.uChar.AsciiChar);
break;
case MOUSE_EVENT:
DOSVM_Int33Console(&msg.Event.MouseEvent);
break;
case WINDOW_BUFFER_SIZE_EVENT:
FIXME("unhandled WINDOW_BUFFER_SIZE_EVENT.\n");
break;
case MENU_EVENT:
FIXME("unhandled MENU_EVENT.\n");
break;
case FOCUS_EVENT:
FIXME("unhandled FOCUS_EVENT.\n");
break;
default:
FIXME("unknown console event: %d\n", msg.EventType);
}
}
}
static void DOSVM_ProcessMessage(MSG *msg)
{
BYTE scan = 0;
TRACE("got message %04x, wparam=%08x, lparam=%08lx\n",msg->message,msg->wParam,msg->lParam);
if ((msg->message>=WM_MOUSEFIRST)&&
(msg->message<=WM_MOUSELAST)) {
DOSVM_Int33Message(msg->message,msg->wParam,msg->lParam);
} else {
switch (msg->message) {
case WM_KEYUP:
scan = 0x80;
case WM_KEYDOWN:
scan |= (msg->lParam >> 16) & 0x7f;
/* check whether extended bit is set,
* and if so, queue the extension prefix */
if (msg->lParam & 0x1000000) {
/* FIXME: some keys (function keys) have
* extended bit set even when they shouldn't,
* should check for them */
DOSVM_Int09SendScan(0xE0,0);
}
DOSVM_Int09SendScan(scan,0);
break;
}
}
}
/***********************************************************************
* Wait (WINEDOS.@)
*/
void WINAPI DOSVM_Wait( INT read_pipe, HANDLE hObject )
{
MSG msg;
DWORD waitret;
HANDLE objs[3];
int objc;
BOOL got_msg = FALSE;
objs[0]=GetStdHandle(STD_INPUT_HANDLE);
objs[1]=event_notifier;
objs[2]=hObject;
objc=hObject?3:2;
do {
/* check for messages (waste time before the response check below) */
if (PeekMessageA)
{
while (PeekMessageA(&msg,0,0,0,PM_REMOVE|PM_NOYIELD)) {
/* got a message */
DOSVM_ProcessMessage(&msg);
/* we don't need a TranslateMessage here */
DispatchMessageA(&msg);
got_msg = TRUE;
}
}
chk_console_input:
if (!got_msg) {
/* check for console input */
INPUT_RECORD msg;
DWORD num;
if (PeekConsoleInputA(objs[0],&msg,1,&num) && num) {
DOSVM_ProcessConsole();
got_msg = TRUE;
}
}
if (read_pipe == -1) {
/* dispatch pending events */
if (SHOULD_PEND(pending_event)) {
CONTEXT86 context = *current_context;
IF_SET(&context);
SET_PEND(&context);
DOSVM_SendQueuedEvents(&context);
got_msg = TRUE;
}
if (got_msg) break;
} else {
fd_set readfds;
struct timeval timeout={0,0};
/* quick check for response from dosmod
* (faster than doing the full blocking wait, if data already available) */
FD_ZERO(&readfds); FD_SET(read_pipe,&readfds);
if (select(read_pipe+1,&readfds,NULL,NULL,&timeout)>0)
break;
}
/* nothing yet, block while waiting for something to do */
if (MsgWaitForMultipleObjects)
waitret = MsgWaitForMultipleObjects(objc,objs,FALSE,INFINITE,QS_ALLINPUT);
else
waitret = WaitForMultipleObjects(objc,objs,FALSE,INFINITE);
if (waitret==(DWORD)-1) {
ERR_(module)("dosvm wait error=%ld\n",GetLastError());
}
if ((read_pipe != -1) && hObject) {
if (waitret==(WAIT_OBJECT_0+2)) break;
}
if (waitret==WAIT_OBJECT_0)
goto chk_console_input;
} while (TRUE);
}
DWORD WINAPI DOSVM_Loop( HANDLE hThread )
{
HANDLE objs[2];
MSG msg;
DWORD waitret;
objs[0] = GetStdHandle(STD_INPUT_HANDLE);
objs[1] = hThread;
for(;;) {
TRACE_(int)("waiting for action\n");
waitret = MsgWaitForMultipleObjects(2, objs, FALSE, INFINITE, QS_ALLINPUT);
if (waitret == WAIT_OBJECT_0) {
DOSVM_ProcessConsole();
}
else if (waitret == WAIT_OBJECT_0 + 1) {
DWORD rv;
if(!GetExitCodeThread(hThread, &rv)) {
ERR("Failed to get thread exit code!\n");
rv = 0;
}
return rv;
}
else if (waitret == WAIT_OBJECT_0 + 2) {
while (PeekMessageA(&msg,0,0,0,PM_REMOVE)) {
if (msg.hwnd) {
/* it's a window message */
DOSVM_ProcessMessage(&msg);
DispatchMessageA(&msg);
} else {
/* it's a thread message */
switch (msg.message) {
case WM_QUIT:
/* stop this madness!! */
return 0;
case WM_USER:
/* run passed procedure in this thread */
/* (sort of like APC, but we signal the completion) */
{
DOS_SPC *spc = (DOS_SPC *)msg.lParam;
TRACE_(int)("calling %p with arg %08lx\n", spc->proc, spc->arg);
(spc->proc)(spc->arg);
TRACE_(int)("done, signalling event %x\n", msg.wParam);
SetEvent( (HANDLE)msg.wParam );
}
break;
}
}
}
}
else
{
ERR_(int)("MsgWaitForMultipleObjects returned unexpected value.\n");
return 0;
}
}
}
static WINE_EXCEPTION_FILTER(exception_handler)
{
EXCEPTION_RECORD *rec = GetExceptionInformation()->ExceptionRecord;
CONTEXT *context = GetExceptionInformation()->ContextRecord;
int ret, arg = rec->ExceptionInformation[0];
switch(rec->ExceptionCode) {
case EXCEPTION_VM86_INTx:
if (TRACE_ON(relay)) {
DPRINTF("Call DOS int 0x%02x ret=%04lx:%04lx\n",
arg, context->SegCs, context->Eip );
DPRINTF(" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx esi=%08lx edi=%08lx\n",
context->Eax, context->Ebx, context->Ecx, context->Edx,
context->Esi, context->Edi );
DPRINTF(" ebp=%08lx esp=%08lx ds=%04lx es=%04lx fs=%04lx gs=%04lx flags=%08lx\n",
context->Ebp, context->Esp, context->SegDs, context->SegEs,
context->SegFs, context->SegGs, context->EFlags );
}
ret = DOSVM_SimulateInt(arg, context, FALSE);
if (TRACE_ON(relay)) {
DPRINTF("Ret DOS int 0x%02x ret=%04lx:%04lx\n",
arg, context->SegCs, context->Eip );
DPRINTF(" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx esi=%08lx edi=%08lx\n",
context->Eax, context->Ebx, context->Ecx, context->Edx,
context->Esi, context->Edi );
DPRINTF(" ebp=%08lx esp=%08lx ds=%04lx es=%04lx fs=%04lx gs=%04lx flags=%08lx\n",
context->Ebp, context->Esp, context->SegDs, context->SegEs,
context->SegFs, context->SegGs, context->EFlags );
}
return ret ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_EXECUTION;
case EXCEPTION_VM86_STI:
/* case EXCEPTION_VM86_PICRETURN: */
IF_SET(context);
EnterCriticalSection(&qcrit);
sig_sent++;
while (NtCurrentTeb()->alarms) {
DOSVM_QueueEvent(0,DOS_PRIORITY_REALTIME,NULL,NULL);
/* hmm, instead of relying on this signal counter, we should
* probably check how many ticks have *really* passed, probably using
* QueryPerformanceCounter() or something like that */
InterlockedDecrement(&(NtCurrentTeb()->alarms));
}
TRACE_(int)("context=%p, current=%p\n", context, current_context);
TRACE_(int)("cs:ip=%04lx:%04lx, ss:sp=%04lx:%04lx\n", context->SegCs, context->Eip, context->SegSs, context->Esp);
if (!ISV86(context)) {
ERR_(int)("@#&*%%, winedos signal handling is *still* messed up\n");
}
TRACE_(int)("DOS task enabled interrupts %s events pending, sending events (time=%ld)\n", IS_PEND(context)?"with":"without", GetTickCount());
DOSVM_SendQueuedEvents(context);
sig_sent=0;
LeaveCriticalSection(&qcrit);
return EXCEPTION_CONTINUE_EXECUTION;
}
return EXCEPTION_CONTINUE_SEARCH;
}
int WINAPI DOSVM_Enter( CONTEXT86 *context )
{
CONTEXT86 *old_context = current_context;
current_context = context;
__TRY
{
__wine_enter_vm86( context );
TRACE_(module)( "vm86 returned: %s\n", strerror(errno) );
}
__EXCEPT(exception_handler)
{
TRACE_(module)( "leaving vm86 mode\n" );
}
__ENDTRY
current_context = old_context;
return 0;
}
/***********************************************************************
* OutPIC (WINEDOS.@)
*/
void WINAPI DOSVM_PIC_ioport_out( WORD port, BYTE val)
{
LPDOSEVENT event;
if ((port==0x20) && (val==0x20)) {
EnterCriticalSection(&qcrit);
if (current_event) {
/* EOI (End Of Interrupt) */
TRACE("received EOI for current IRQ, clearing\n");
event = current_event;
current_event = event->next;
if (event->relay)
(*event->relay)(NULL,event->data);
free(event);
if (pending_event) {
/* another event is pending, which we should probably
* be able to process now */
TRACE("another event pending, setting flag\n");
current_context->EFlags |= VIP_MASK;
}
} else {
WARN("EOI without active IRQ\n");
}
LeaveCriticalSection(&qcrit);
} else {
FIXME("unrecognized PIC command %02x\n",val);
}
}
/***********************************************************************
* SetTimer (WINEDOS.@)
*/
void WINAPI DOSVM_SetTimer( UINT ticks )
{
struct itimerval tim;
if (dosvm_pid) {
/* the PC clocks ticks at 1193180 Hz */
tim.it_interval.tv_sec=0;
tim.it_interval.tv_usec=MulDiv(ticks,1000000,1193180);
/* sanity check */
if (!tim.it_interval.tv_usec) tim.it_interval.tv_usec=1;
/* first tick value */
tim.it_value = tim.it_interval;
TRACE_(int)("setting timer tick delay to %ld us\n", tim.it_interval.tv_usec);
setitimer(ITIMER_REAL, &tim, NULL);
}
}
/***********************************************************************
* GetTimer (WINEDOS.@)
*/
UINT WINAPI DOSVM_GetTimer( void )
{
struct itimerval tim;
if (dosvm_pid) {
getitimer(ITIMER_REAL, &tim);
return MulDiv(tim.it_value.tv_usec,1193180,1000000);
}
return 0;
}
#else /* !MZ_SUPPORTED */
/***********************************************************************
* Enter (WINEDOS.@)
*/
INT WINAPI DOSVM_Enter( CONTEXT86 *context )
{
ERR_(module)("DOS realmode not supported on this architecture!\n");
return -1;
}
/***********************************************************************
* Wait (WINEDOS.@)
*/
void WINAPI DOSVM_Wait( INT read_pipe, HANDLE hObject) {}
/***********************************************************************
* OutPIC (WINEDOS.@)
*/
void WINAPI DOSVM_PIC_ioport_out( WORD port, BYTE val) {}
/***********************************************************************
* SetTimer (WINEDOS.@)
*/
void WINAPI DOSVM_SetTimer( UINT ticks ) {}
/***********************************************************************
* GetTimer (WINEDOS.@)
*/
UINT WINAPI DOSVM_GetTimer( void ) { return 0; }
/***********************************************************************
* QueueEvent (WINEDOS.@)
*/
void WINAPI DOSVM_QueueEvent( INT irq, INT priority, DOSRELAY relay, LPVOID data)
{
if (irq<0) {
/* callback event, perform it with dummy context */
CONTEXT86 context;
memset(&context,0,sizeof(context));
(*relay)(&context,data);
} else {
ERR("IRQ without DOS task: should not happen\n");
}
}
#endif
/**********************************************************************
* DOSVM_GetRMHandler
*
* Return the real mode interrupt vector for a given interrupt.
*/
FARPROC16 DOSVM_GetRMHandler( BYTE intnum )
{
return ((FARPROC16*)0)[intnum];
}
/**********************************************************************
* DOSVM_SetRMHandler
*
* Set the real mode interrupt handler for a given interrupt.
*/
void DOSVM_SetRMHandler( BYTE intnum, FARPROC16 handler )
{
TRACE("Set real mode interrupt vector %02x <- %04x:%04x\n",
intnum, HIWORD(handler), LOWORD(handler) );
((FARPROC16*)0)[intnum] = handler;
}
static const INTPROC real_mode_handlers[] =
{
/* 00 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 08 */ 0, DOSVM_Int09Handler, 0, 0, 0, 0, 0, 0,
/* 10 */ DOSVM_Int10Handler, INT_Int11Handler, INT_Int12Handler, INT_Int13Handler,
0, INT_Int15Handler, DOSVM_Int16Handler, DOSVM_Int17Handler,
/* 18 */ 0, 0, INT_Int1aHandler, 0, 0, 0, 0, 0,
/* 20 */ DOSVM_Int20Handler, DOSVM_Int21Handler, 0, 0, 0, INT_Int25Handler, 0, 0,
/* 28 */ 0, DOSVM_Int29Handler, INT_Int2aHandler, 0, 0, 0, 0, INT_Int2fHandler,
/* 30 */ 0, DOSVM_Int31Handler, 0, DOSVM_Int33Handler, INT_Int34Handler, INT_Int35Handler, INT_Int36Handler, INT_Int37Handler,
/* 38 */ INT_Int38Handler, INT_Int39Handler, INT_Int3aHandler, INT_Int3bHandler, INT_Int3cHandler, INT_Int3dHandler, INT_Int3eHandler, 0,
/* 40 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 48 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 50 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 58 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 60 */ 0, 0, 0, 0, 0, 0, 0, DOSVM_Int67Handler
};
/**********************************************************************
* DOSVM_RealModeInterrupt
*
* Handle real mode interrupts
*/
void DOSVM_RealModeInterrupt( BYTE intnum, CONTEXT86 *context )
{
if (intnum < sizeof(real_mode_handlers)/sizeof(INTPROC) && real_mode_handlers[intnum])
(*real_mode_handlers[intnum])(context);
else
{
FIXME("Unknown Interrupt in DOS mode: 0x%x\n", intnum);
FIXME(" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx\n",
context->Eax, context->Ebx, context->Ecx, context->Edx);
FIXME(" esi=%08lx edi=%08lx ds=%04lx es=%04lx\n",
context->Esi, context->Edi, context->SegDs, context->SegEs );
}
}
/**********************************************************************
* DOSVM_Init
*/
BOOL WINAPI DOSVM_Init( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved )
{
TRACE_(module)("(%p,%ld,%p)\n", hinstDLL, fdwReason, lpvReserved);
if (fdwReason == DLL_PROCESS_ATTACH)
{
/* initialize the memory */
TRACE("Initializing DOS memory structures\n");
DOSMEM_Init( TRUE );
DOSDEV_InstallDOSDevices();
DOSVM_dpmi_segments = DOSMEM_GetDPMISegments();
#ifdef MZ_SUPPORTED
event_notifier = CreateEventA(NULL, FALSE, FALSE, NULL);
if(!event_notifier)
ERR("Failed to create event object!\n");
#endif
}
return TRUE;
}
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