/*
 * Win32 device functions
 *
 * Copyright 1998 Marcus Meissner
 * Copyright 1998 Ulrich Weigand
 *
 */

#include <errno.h>
#include <assert.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <string.h>
#include <time.h>
#include "windows.h"
#include "winbase.h"
#include "winerror.h"
#include "file.h"
#include "process.h"
#include "mmsystem.h"
#include "heap.h"
#include "debug.h"
#include "winioctl.h"
#include "stackframe.h"

static void DEVICE_Destroy(K32OBJ *dev);
const K32OBJ_OPS DEVICE_Ops =
{
    NULL,		/* signaled */
    NULL,		/* satisfied */
    NULL,		/* add_wait */
    NULL,		/* remove_wait */
    NULL,		/* read */
    NULL,		/* write */
    DEVICE_Destroy	/* destroy */
};

/* The device object */
typedef struct
{
    K32OBJ    header;

    struct VxDInfo *info;
    char     *devname;
    int       mode;

} DEVICE_OBJECT;


static BOOL32 DeviceIo_VTDAPI(DEVICE_OBJECT *dev, DWORD dwIoControlCode, 
			      LPVOID lpvInBuffer, DWORD cbInBuffer,
			      LPVOID lpvOutBuffer, DWORD cbOutBuffer,
			      LPDWORD lpcbBytesReturned,
			      LPOVERLAPPED lpOverlapped);

static BOOL32 VxDCall_VMM( DWORD *retv, DWORD service, CONTEXT *context );

/*
 * VxD names are taken from the Win95 DDK
 */

struct VxDInfo
{
    LPCSTR  name;
    WORD    id;
    BOOL32  (*vxdcall)(DWORD *, DWORD, CONTEXT *);
    BOOL32  (*deviceio)(DEVICE_OBJECT *, DWORD, LPVOID, DWORD, 
                        LPVOID, DWORD, LPDWORD, LPOVERLAPPED);
}   
    VxDList[] = 
{
    /* Standard VxD IDs */
    { "VMM",      0x0001, VxDCall_VMM, NULL },
    { "DEBUG",    0x0002, NULL, NULL },
    { "VPICD",    0x0003, NULL, NULL },
    { "VDMAD",    0x0004, NULL, NULL },
    { "VTD",      0x0005, NULL, NULL },
    { "V86MMGR",  0x0006, NULL, NULL },
    { "PAGESWAP", 0x0007, NULL, NULL },
    { "PARITY",   0x0008, NULL, NULL },
    { "REBOOT",   0x0009, NULL, NULL },
    { "VDD",      0x000A, NULL, NULL },
    { "VSD",      0x000B, NULL, NULL },
    { "VMD",      0x000C, NULL, NULL },
    { "VKD",      0x000D, NULL, NULL },
    { "VCD",      0x000E, NULL, NULL },
    { "VPD",      0x000F, NULL, NULL },
    { "BLOCKDEV", 0x0010, NULL, NULL },
    { "VMCPD",    0x0011, NULL, NULL },
    { "EBIOS",    0x0012, NULL, NULL },
    { "BIOSXLAT", 0x0013, NULL, NULL },
    { "VNETBIOS", 0x0014, NULL, NULL },
    { "DOSMGR",   0x0015, NULL, NULL },
    { "WINLOAD",  0x0016, NULL, NULL },
    { "SHELL",    0x0017, NULL, NULL },
    { "VMPOLL",   0x0018, NULL, NULL },
    { "VPROD",    0x0019, NULL, NULL },
    { "DOSNET",   0x001A, NULL, NULL },
    { "VFD",      0x001B, NULL, NULL },
    { "VDD2",     0x001C, NULL, NULL },
    { "WINDEBUG", 0x001D, NULL, NULL },
    { "TSRLOAD",  0x001E, NULL, NULL },
    { "BIOSHOOK", 0x001F, NULL, NULL },
    { "INT13",    0x0020, NULL, NULL },
    { "PAGEFILE", 0x0021, NULL, NULL },
    { "SCSI",     0x0022, NULL, NULL },
    { "MCA_POS",  0x0023, NULL, NULL },
    { "SCSIFD",   0x0024, NULL, NULL },
    { "VPEND",    0x0025, NULL, NULL },
    { "VPOWERD",  0x0026, NULL, NULL },
    { "VXDLDR",   0x0027, NULL, NULL },
    { "NDIS",     0x0028, NULL, NULL },
    { "BIOS_EXT", 0x0029, NULL, NULL },
    { "VWIN32",   0x002A, NULL, NULL },
    { "VCOMM",    0x002B, NULL, NULL },
    { "SPOOLER",  0x002C, NULL, NULL },
    { "WIN32S",   0x002D, NULL, NULL },
    { "DEBUGCMD", 0x002E, NULL, NULL },

    { "VNB",      0x0031, NULL, NULL },
    { "SERVER",   0x0032, NULL, NULL },
    { "CONFIGMG", 0x0033, NULL, NULL },
    { "DWCFGMG",  0x0034, NULL, NULL },
    { "SCSIPORT", 0x0035, NULL, NULL },
    { "VFBACKUP", 0x0036, NULL, NULL },
    { "ENABLE",   0x0037, NULL, NULL },
    { "VCOND",    0x0038, NULL, NULL },

    { "EFAX",     0x003A, NULL, NULL },
    { "DSVXD",    0x003B, NULL, NULL },
    { "ISAPNP",   0x003C, NULL, NULL },
    { "BIOS",     0x003D, NULL, NULL },
    { "WINSOCK",  0x003E, NULL, NULL },
    { "WSOCK",    0x003E, NULL, NULL },
    { "WSIPX",    0x003F, NULL, NULL },
    { "IFSMgr",   0x0040, NULL, NULL },
    { "VCDFSD",   0x0041, NULL, NULL },
    { "MRCI2",    0x0042, NULL, NULL },
    { "PCI",      0x0043, NULL, NULL },
    { "PELOADER", 0x0044, NULL, NULL },
    { "EISA",     0x0045, NULL, NULL },
    { "DRAGCLI",  0x0046, NULL, NULL },
    { "DRAGSRV",  0x0047, NULL, NULL },
    { "PERF",     0x0048, NULL, NULL },
    { "AWREDIR",  0x0049, NULL, NULL },

    /* Far East support */
    { "ETEN",     0x0060, NULL, NULL },
    { "CHBIOS",   0x0061, NULL, NULL },
    { "VMSGD",    0x0062, NULL, NULL },
    { "VPPID",    0x0063, NULL, NULL },
    { "VIME",     0x0064, NULL, NULL },
    { "VHBIOSD",  0x0065, NULL, NULL },

    /* Multimedia OEM IDs */
    { "VTDAPI",   0x0442, NULL, DeviceIo_VTDAPI },

    /* Network Device IDs */
    { "VNetSup",  0x0480, NULL, NULL },
    { "VRedir",   0x0481, NULL, NULL },
    { "VBrowse",  0x0482, NULL, NULL },
    { "VSHARE",   0x0483, NULL, NULL },
    { "IFSMgr",   0x0484, NULL, NULL },
    { "MEMPROBE", 0x0485, NULL, NULL },
    { "VFAT",     0x0486, NULL, NULL },
    { "NWLINK",   0x0487, NULL, NULL },
    { "VNWLINK",  0x0487, NULL, NULL },
    { "NWSUP",    0x0487, NULL, NULL },
    { "VTDI",     0x0488, NULL, NULL },
    { "VIP",      0x0489, NULL, NULL },
    { "VTCP",     0x048A, NULL, NULL },
    { "VCache",   0x048B, NULL, NULL },
    { "VUDP",     0x048C, NULL, NULL },
    { "VAsync",   0x048D, NULL, NULL },
    { "NWREDIR",  0x048E, NULL, NULL },
    { "STAT80",   0x048F, NULL, NULL },
    { "SCSIPORT", 0x0490, NULL, NULL },
    { "FILESEC",  0x0491, NULL, NULL },
    { "NWSERVER", 0x0492, NULL, NULL },
    { "SECPROV",  0x0493, NULL, NULL },
    { "NSCL",     0x0494, NULL, NULL },
    { "WSTCP",    0x0495, NULL, NULL },
    { "NDIS2SUP", 0x0496, NULL, NULL },
    { "MSODISUP", 0x0497, NULL, NULL },
    { "Splitter", 0x0498, NULL, NULL },
    { "PPP",      0x0499, NULL, NULL },
    { "VDHCP",    0x049A, NULL, NULL },
    { "VNBT",     0x049B, NULL, NULL },
    { "LOGGER",   0x049D, NULL, NULL },
    { "EFILTER",  0x049E, NULL, NULL },
    { "FFILTER",  0x049F, NULL, NULL },
    { "TFILTER",  0x04A0, NULL, NULL },
    { "AFILTER",  0x04A1, NULL, NULL },
    { "IRLAMP",   0x04A2, NULL, NULL },

    { NULL,       0,      NULL, NULL }
};

/*
 * VMM VxDCall service names are (mostly) taken from Stan Mitchell's
 * "Inside the Windows 95 File System"
 */

#define N_VMM_SERVICE 41

LPCSTR VMM_Service_Name[N_VMM_SERVICE] =
{ 
    "PageReserve",            /* 0x0000 */
    "PageCommit",             /* 0x0001 */
    "PageDecommit",           /* 0x0002 */
    "PagerRegister",          /* 0x0003 */
    "PagerQuery",             /* 0x0004 */
    "HeapAllocate",           /* 0x0005 */
    "ContextCreate",          /* 0x0006 */
    "ContextDestroy",         /* 0x0007 */
    "PageAttach",             /* 0x0008 */
    "PageFlush",              /* 0x0009 */
    "PageFree",               /* 0x000A */
    "ContextSwitch",          /* 0x000B */
    "HeapReAllocate",         /* 0x000C */
    "PageModifyPerm",         /* 0x000D */
    "PageQuery",              /* 0x000E */
    "GetCurrentContext",      /* 0x000F */
    "HeapFree",               /* 0x0010 */
    "RegOpenKey",             /* 0x0011 */
    "RegCreateKey",           /* 0x0012 */
    "RegCloseKey",            /* 0x0013 */
    "RegDeleteKey",           /* 0x0014 */
    "RegSetValue",            /* 0x0015 */
    "RegDeleteValue",         /* 0x0016 */
    "RegQueryValue",          /* 0x0017 */
    "RegEnumKey",             /* 0x0018 */
    "RegEnumValue",           /* 0x0019 */
    "RegQueryValueEx",        /* 0x001A */
    "RegSetValueEx",          /* 0x001B */
    "RegFlushKey",            /* 0x001C */
    "RegQueryInfoKey",        /* 0x001D */
    "GetDemandPageInfo",      /* 0x001E */
    "BlockOnID",              /* 0x001F */
    "SignalID",               /* 0x0020 */
    "RegLoadKey",             /* 0x0021 */
    "RegUnLoadKey",           /* 0x0022 */
    "RegSaveKey",             /* 0x0023 */
    "RegRemapPreDefKey",      /* 0x0024 */
    "PageChangePager",        /* 0x0025 */
    "RegQueryMultipleValues", /* 0x0026 */
    "RegReplaceKey",          /* 0x0027 */
    "<KERNEL32.101>"          /* 0x0028 -- What does this do??? */
};


HANDLE32 DEVICE_Open(LPCSTR filename, DWORD access) 
{
	DEVICE_OBJECT *dev;
	HANDLE32 handle;
	int i;

	dev = HeapAlloc( SystemHeap, 0, sizeof(DEVICE_OBJECT) );
	if (!dev) return INVALID_HANDLE_VALUE32;

	dev->header.type = K32OBJ_DEVICE_IOCTL;
	dev->header.refcount = 1;
	dev->mode	= access;
	dev->devname	= HEAP_strdupA(SystemHeap,0,filename);
	dev->info       = NULL;

	for (i = 0; VxDList[i].name; i++)
	    if (!lstrcmpi32A(VxDList[i].name, filename))
	        break;
	if (VxDList[i].name)
	    dev->info = VxDList + i;
	else
	    FIXME(win32, "Unknown VxD %s\n", filename);


	handle = HANDLE_Alloc( PROCESS_Current(), &(dev->header),
			       FILE_ALL_ACCESS | GENERIC_READ |
			       GENERIC_WRITE | GENERIC_EXECUTE /*FIXME*/, TRUE, -1 );
	/* If the allocation failed, the object is already destroyed */
	if (handle == INVALID_HANDLE_VALUE32) dev = NULL;
	return handle;
}

static void DEVICE_Destroy(K32OBJ *obj) 
{
    DEVICE_OBJECT *dev = (DEVICE_OBJECT *)obj;
    assert( obj->type == K32OBJ_DEVICE_IOCTL );

    if ( dev->devname )
    {
        HeapFree( SystemHeap, 0, dev->devname );
        dev->devname = NULL;
    }

    obj->type = K32OBJ_UNKNOWN;
    HeapFree( SystemHeap, 0, dev );
}

/****************************************************************************
 *		DeviceIoControl (KERNEL32.188)
 * This is one of those big ugly nasty procedure which can do
 * a million and one things when it comes to devices. It can also be
 * used for VxD communication.
 *
 * A return value of FALSE indicates that something has gone wrong which
 * GetLastError can decypher.
 */
BOOL32 WINAPI DeviceIoControl(HANDLE32 hDevice, DWORD dwIoControlCode, 
			      LPVOID lpvInBuffer, DWORD cbInBuffer,
			      LPVOID lpvOutBuffer, DWORD cbOutBuffer,
			      LPDWORD lpcbBytesReturned,
			      LPOVERLAPPED lpOverlapped)
{
	DEVICE_OBJECT	*dev = (DEVICE_OBJECT *)HANDLE_GetObjPtr(
		PROCESS_Current(), hDevice, K32OBJ_DEVICE_IOCTL, 0 /*FIXME*/, NULL );

        TRACE(win32, "(%d,%ld,%p,%ld,%p,%ld,%p,%p)\n",
		hDevice,dwIoControlCode,lpvInBuffer,cbInBuffer,
		lpvOutBuffer,cbOutBuffer,lpcbBytesReturned,lpOverlapped
	);

	if (!dev)
	{
		SetLastError( ERROR_INVALID_PARAMETER );
		return FALSE;
	}

	/* Check if this is a user defined control code for a VxD */
        if( HIWORD( dwIoControlCode ) == 0 )
        {
	    if ( dev->info && dev->info->deviceio )
	        return dev->info->deviceio( dev, dwIoControlCode, 
                                            lpvInBuffer, cbInBuffer, 
                                            lpvOutBuffer, cbOutBuffer, 
                                            lpcbBytesReturned, lpOverlapped );

	    /* FIXME: Set appropriate error */
	    FIXME( win32, "Unimplemented control %ld for VxD device %s\n", 
	                  dwIoControlCode, dev->devname );
	}
	else
	{
		switch( dwIoControlCode )
		{
		case FSCTL_DELETE_REPARSE_POINT:
		case FSCTL_DISMOUNT_VOLUME:
		case FSCTL_GET_COMPRESSION:
		case FSCTL_GET_REPARSE_POINT:
		case FSCTL_LOCK_VOLUME:
		case FSCTL_QUERY_ALLOCATED_RANGES:
		case FSCTL_SET_COMPRESSION:
		case FSCTL_SET_REPARSE_POINT:
		case FSCTL_SET_SPARSE:
		case FSCTL_SET_ZERO_DATA:
		case FSCTL_UNLOCK_VOLUME:
		case IOCTL_DISK_CHECK_VERIFY:
		case IOCTL_DISK_EJECT_MEDIA:
		case IOCTL_DISK_FORMAT_TRACKS:
		case IOCTL_DISK_GET_DRIVE_GEOMETRY:
		case IOCTL_DISK_GET_DRIVE_LAYOUT:
		case IOCTL_DISK_GET_MEDIA_TYPES:
		case IOCTL_DISK_GET_PARTITION_INFO:
		case IOCTL_DISK_LOAD_MEDIA:
		case IOCTL_DISK_MEDIA_REMOVAL:
		case IOCTL_DISK_PERFORMANCE:
		case IOCTL_DISK_REASSIGN_BLOCKS:
		case IOCTL_DISK_SET_DRIVE_LAYOUT:
		case IOCTL_DISK_SET_PARTITION_INFO:
		case IOCTL_DISK_VERIFY:
		case IOCTL_SERIAL_LSRMST_INSERT:
		case IOCTL_STORAGE_CHECK_VERIFY:
		case IOCTL_STORAGE_EJECT_MEDIA:
		case IOCTL_STORAGE_GET_MEDIA_TYPES:
		case IOCTL_STORAGE_LOAD_MEDIA:
		case IOCTL_STORAGE_MEDIA_REMOVAL:
    			FIXME( win32, "unimplemented dwIoControlCode=%08lx\n", dwIoControlCode);
    			SetLastError( ERROR_CALL_NOT_IMPLEMENTED );
    			return FALSE;
    			break;
		default:
    			FIXME( win32, "ignored dwIoControlCode=%08lx\n",dwIoControlCode);
    			SetLastError( ERROR_CALL_NOT_IMPLEMENTED );
    			return FALSE;
    			break;
		}
	}
   	return FALSE;
}
 
/***********************************************************************
 *           DeviceIo_VTDAPI
 */
static BOOL32 DeviceIo_VTDAPI(DEVICE_OBJECT *dev, DWORD dwIoControlCode, 
			      LPVOID lpvInBuffer, DWORD cbInBuffer,
			      LPVOID lpvOutBuffer, DWORD cbOutBuffer,
			      LPDWORD lpcbBytesReturned,
			      LPOVERLAPPED lpOverlapped)
{
    BOOL32 retv = TRUE;

    switch (dwIoControlCode)
    {
    case 5:
        if (lpvOutBuffer && (cbOutBuffer>=4))
            *(DWORD*)lpvOutBuffer = timeGetTime();

        if (lpcbBytesReturned)
            *lpcbBytesReturned = 4;

        break;

    default:
        FIXME(win32, "Control %ld not implemented\n", dwIoControlCode);
        retv = FALSE;
        break;
    }

    return retv;
}


/***********************************************************************
 *           VxDCall                   (KERNEL32.[1-9])
 */
static void VxDCall( CONTEXT *context, int nArgs )
{
    DWORD retv, service;
    int i, ok = FALSE;

    /* Pop return address to caller */
    EIP_reg(context) = STACK32_POP(context);

    /* Pop requested service ID */
    service = STACK32_POP(context);

    TRACE(win32, "(%08lx, ...)\n", service);

    for (i = 0; VxDList[i].name; i++)
        if (VxDList[i].id == HIWORD(service))
            break;

    if (!VxDList[i].name)
        FIXME(win32, "Unknown VxD (%08lx)\n", service);
    else if (!VxDList[i].vxdcall)
        FIXME(win32, "Unimplemented VxD (%08lx)\n", service);
    else
        ok = VxDList[i].vxdcall(&retv, service, context);

    /* If unimplemented, trust the caller to have called the
       version with the correct number of arguments */
    if (!ok)
    {
        ESP_reg(context) += 4 * nArgs;
        retv = 0xffffffff;  /* FIXME */
    }

    /* Push return address back onto stack */
    STACK32_PUSH(context, EIP_reg(context));

    /* Return to caller */
    EAX_reg(context) = retv;
}

REGS_ENTRYPOINT(VxDCall0) { VxDCall( context, 0 ); }
REGS_ENTRYPOINT(VxDCall1) { VxDCall( context, 1 ); }
REGS_ENTRYPOINT(VxDCall2) { VxDCall( context, 2 ); }
REGS_ENTRYPOINT(VxDCall3) { VxDCall( context, 3 ); }
REGS_ENTRYPOINT(VxDCall4) { VxDCall( context, 4 ); }
REGS_ENTRYPOINT(VxDCall5) { VxDCall( context, 5 ); }
REGS_ENTRYPOINT(VxDCall6) { VxDCall( context, 6 ); }
REGS_ENTRYPOINT(VxDCall7) { VxDCall( context, 7 ); }
REGS_ENTRYPOINT(VxDCall8) { VxDCall( context, 8 ); }

/***********************************************************************
 *           VxDCall_VMM
 */
BOOL32 VxDCall_VMM( DWORD *retv, DWORD service, CONTEXT *context )
{
    BOOL32 ok = TRUE;

    switch ( LOWORD(service) )
    {
    case 0x0011:  /* RegOpenKey */
    {
        HKEY    hkey       = (HKEY)   STACK32_POP( context );
        LPCSTR  lpszSubKey = (LPCSTR) STACK32_POP( context );
        LPHKEY  retkey     = (LPHKEY) STACK32_POP( context );
        *retv = RegOpenKey32A( hkey, lpszSubKey, retkey );
    }
    break;

    case 0x0012:  /* RegCreateKey */
    {
        HKEY    hkey       = (HKEY)   STACK32_POP( context );
        LPCSTR  lpszSubKey = (LPCSTR) STACK32_POP( context );
        LPHKEY  retkey     = (LPHKEY) STACK32_POP( context );
        *retv = RegCreateKey32A( hkey, lpszSubKey, retkey );
    }
    break;

    case 0x0013:  /* RegCloseKey */
    {
        HKEY    hkey       = (HKEY)   STACK32_POP( context );
        *retv = RegCloseKey( hkey );
    }
    break;

    case 0x0014:  /* RegDeleteKey */
    {
        HKEY    hkey       = (HKEY)   STACK32_POP( context );
        LPCSTR  lpszSubKey = (LPCSTR) STACK32_POP( context );
        *retv = RegDeleteKey32A( hkey, lpszSubKey );
    }
    break;

    case 0x0015:  /* RegSetValue */
    {
        HKEY    hkey       = (HKEY)   STACK32_POP( context );
        LPCSTR  lpszSubKey = (LPCSTR) STACK32_POP( context );
        DWORD   dwType     = (DWORD)  STACK32_POP( context );
        LPCSTR  lpszData   = (LPCSTR) STACK32_POP( context );
        DWORD   cbData     = (DWORD)  STACK32_POP( context );
        *retv = RegSetValue32A( hkey, lpszSubKey, dwType, lpszData, cbData );
    }
    break;

    case 0x0016:  /* RegDeleteValue */
    {
        HKEY    hkey       = (HKEY)   STACK32_POP( context );
        LPSTR   lpszValue  = (LPSTR)  STACK32_POP( context );
        *retv = RegDeleteValue32A( hkey, lpszValue );
    }
    break;

    case 0x0017:  /* RegQueryValue */
    {
        HKEY    hkey       = (HKEY)   STACK32_POP( context );
        LPSTR   lpszSubKey = (LPSTR)  STACK32_POP( context );
        LPSTR   lpszData   = (LPSTR)  STACK32_POP( context );
        LPDWORD lpcbData   = (LPDWORD)STACK32_POP( context );
        *retv = RegQueryValue32A( hkey, lpszSubKey, lpszData, lpcbData );
    }
    break;

    case 0x0018:  /* RegEnumKey */
    {
        HKEY    hkey       = (HKEY)   STACK32_POP( context );
        DWORD   iSubkey    = (DWORD)  STACK32_POP( context );
        LPSTR   lpszName   = (LPSTR)  STACK32_POP( context );
        DWORD   lpcchName  = (DWORD)  STACK32_POP( context );
        *retv = RegEnumKey32A( hkey, iSubkey, lpszName, lpcchName );
    }
    break;

    case 0x0019:  /* RegEnumValue */
    {
        HKEY    hkey       = (HKEY)   STACK32_POP( context );
        DWORD   iValue     = (DWORD)  STACK32_POP( context );
        LPSTR   lpszValue  = (LPSTR)  STACK32_POP( context );
        LPDWORD lpcchValue = (LPDWORD)STACK32_POP( context );
        LPDWORD lpReserved = (LPDWORD)STACK32_POP( context );
        LPDWORD lpdwType   = (LPDWORD)STACK32_POP( context );
        LPBYTE  lpbData    = (LPBYTE) STACK32_POP( context );
        LPDWORD lpcbData   = (LPDWORD)STACK32_POP( context );
        *retv = RegEnumValue32A( hkey, iValue, lpszValue, lpcchValue, 
                                 lpReserved, lpdwType, lpbData, lpcbData );
    }
    break;

    case 0x001A:  /* RegQueryValueEx */
    {
        HKEY    hkey       = (HKEY)   STACK32_POP( context );
        LPSTR   lpszValue  = (LPSTR)  STACK32_POP( context );
        LPDWORD lpReserved = (LPDWORD)STACK32_POP( context );
        LPDWORD lpdwType   = (LPDWORD)STACK32_POP( context );
        LPBYTE  lpbData    = (LPBYTE) STACK32_POP( context );
        LPDWORD lpcbData   = (LPDWORD)STACK32_POP( context );
        *retv = RegQueryValueEx32A( hkey, lpszValue, lpReserved, 
                                    lpdwType, lpbData, lpcbData );
    }
    break;

    case 0x001B:  /* RegSetValueEx */
    {
        HKEY    hkey       = (HKEY)   STACK32_POP( context );
        LPSTR   lpszValue  = (LPSTR)  STACK32_POP( context );
        DWORD   dwReserved = (DWORD)  STACK32_POP( context );
        DWORD   dwType     = (DWORD)  STACK32_POP( context );
        LPBYTE  lpbData    = (LPBYTE) STACK32_POP( context );
        DWORD   cbData     = (DWORD)STACK32_POP( context );
        *retv = RegSetValueEx32A( hkey, lpszValue, dwReserved, 
                                  dwType, lpbData, cbData );
    }
    break;

    case 0x001C:  /* RegFlushKey */
    {
        HKEY    hkey       = (HKEY)   STACK32_POP( context );
        *retv = RegFlushKey( hkey );
    }
    break;

    case 0x001D:  /* RegQueryInfoKey */
    {
        /* NOTE: This VxDCall takes only a subset of the parameters that the
                 corresponding Win32 API call does. The implementation in Win95
                 ADVAPI32 sets all output parameters not mentioned here to zero. */

        HKEY    hkey       = (HKEY)   STACK32_POP( context );
        LPDWORD lpcSubKeys = (LPDWORD)STACK32_POP( context );
        LPDWORD lpcchMaxSubKey 
                           = (LPDWORD)STACK32_POP( context );
        LPDWORD lpcValues  = (LPDWORD)STACK32_POP( context );
        LPDWORD lpcchMaxValueName 
                           = (LPDWORD)STACK32_POP( context );
        LPDWORD lpcchMaxValueData 
                           = (LPDWORD)STACK32_POP( context );
        *retv = RegQueryInfoKey32A( hkey, NULL, NULL, NULL, lpcSubKeys, lpcchMaxSubKey,
                                    NULL, lpcValues, lpcchMaxValueName, lpcchMaxValueData,
                                    NULL, NULL );
    }
    break;

    case 0x0021:  /* RegLoadKey */
    {
        HKEY    hkey       = (HKEY)   STACK32_POP( context );
        LPCSTR  lpszSubKey = (LPCSTR) STACK32_POP( context );
        LPCSTR  lpszFile   = (LPCSTR) STACK32_POP( context );
        *retv = RegLoadKey32A( hkey, lpszSubKey, lpszFile );
    }
    break;

    case 0x0022:  /* RegUnLoadKey */
    {
        HKEY    hkey       = (HKEY)   STACK32_POP( context );
        LPCSTR  lpszSubKey = (LPCSTR) STACK32_POP( context );
        *retv = RegUnLoadKey32A( hkey, lpszSubKey );
    }
    break;

    case 0x0023:  /* RegSaveKey */
    {
        HKEY    hkey       = (HKEY)   STACK32_POP( context );
        LPCSTR  lpszFile   = (LPCSTR) STACK32_POP( context );
        LPSECURITY_ATTRIBUTES sa = 
               (LPSECURITY_ATTRIBUTES)STACK32_POP( context );
        *retv = RegSaveKey32A( hkey, lpszFile, sa );
    }
    break;

#if 0 /* Functions are not yet implemented in misc/registry.c */
    case 0x0024:  /* RegRemapPreDefKey */
    case 0x0026:  /* RegQueryMultipleValues */
#endif

    case 0x0027:  /* RegReplaceKey */
    {
        HKEY    hkey       = (HKEY)   STACK32_POP( context );
        LPCSTR  lpszSubKey = (LPCSTR) STACK32_POP( context );
        LPCSTR  lpszNewFile= (LPCSTR) STACK32_POP( context );
        LPCSTR  lpszOldFile= (LPCSTR) STACK32_POP( context );
        *retv = RegReplaceKey32A( hkey, lpszSubKey, lpszNewFile, lpszOldFile );
    }
    break;

    default:
        if (LOWORD(service) < N_VMM_SERVICE)
            FIXME(win32, "Unimplemented service %s (%08lx)\n",
                          VMM_Service_Name[LOWORD(service)], service);
        else
            FIXME(win32, "Unknown service %08lx\n", service);

        ok = FALSE;
        break;
    }

    return ok;
}