oleaut.c

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/*
 *  OLEAUT32
 *
 * Copyright 1999, 2000 Marcus Meissner
 *
 * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <limits.h>

#define COBJMACROS

#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winerror.h"

#include "ole2.h"
#include "olectl.h"
#include "oleauto.h"
#include "initguid.h"
#include "typelib.h"
#include "oleaut32_oaidl.h"

#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(ole);
WINE_DECLARE_DEBUG_CHANNEL(heap);

/******************************************************************************
 * BSTR  {OLEAUT32}
 *
 * NOTES
 *  BSTR is a simple typedef for a wide-character string used as the principle
 *  string type in ole automation. When encapsulated in a Variant type they are
 *  automatically copied and destroyed as the variant is processed.
 *
 *  The low level BSTR API allows manipulation of these strings and is used by
 *  higher level API calls to manage the strings transparently to the caller.
 *
 *  Internally the BSTR type is allocated with space for a DWORD byte count before
 *  the string data begins. This is undocumented and non-system code should not
 *  access the count directly. Use SysStringLen() or SysStringByteLen()
 *  instead. Note that the byte count does not include the terminating NUL.
 *
 *  To create a new BSTR, use SysAllocString(), SysAllocStringLen() or
 *  SysAllocStringByteLen(). To change the size of an existing BSTR, use SysReAllocString()
 *  or SysReAllocStringLen(). Finally to destroy a string use SysFreeString().
 *
 *  BSTR's are cached by Ole Automation by default. To override this behaviour
 *  either set the environment variable 'OANOCACHE', or call SetOaNoCache().
 *
 * SEE ALSO
 *  'Inside OLE, second edition' by Kraig Brockshmidt.
 */

static BOOL bstr_cache_enabled;

static CRITICAL_SECTION cs_bstr_cache;
static CRITICAL_SECTION_DEBUG cs_bstr_cache_dbg =
{
    0, 0, &cs_bstr_cache,
    { &cs_bstr_cache_dbg.ProcessLocksList, &cs_bstr_cache_dbg.ProcessLocksList },
      0, 0, { (DWORD_PTR)(__FILE__ ": bstr_cache") }
};
static CRITICAL_SECTION cs_bstr_cache = { &cs_bstr_cache_dbg, -1, 0, 0, 0, 0 };

typedef struct {
#ifdef _WIN64
    DWORD pad;
#endif
    DWORD size;
    union {
        char ptr[1];
        WCHAR str[1];
        DWORD dwptr[1];
    } u;
} bstr_t;

#define BUCKET_SIZE 16
#define BUCKET_BUFFER_SIZE 6

typedef struct {
    unsigned short head;
    unsigned short cnt;
    bstr_t *buf[BUCKET_BUFFER_SIZE];
} bstr_cache_entry_t;

#define ARENA_INUSE_FILLER     0x55
#define ARENA_TAIL_FILLER      0xab
#define ARENA_FREE_FILLER      0xfeeefeee

static bstr_cache_entry_t bstr_cache[0x10000/BUCKET_SIZE];

static inline size_t bstr_alloc_size(size_t size)
{
    return (FIELD_OFFSET(bstr_t, u.ptr[size]) + sizeof(WCHAR) + BUCKET_SIZE-1) & ~(BUCKET_SIZE-1);
}

static inline bstr_t *bstr_from_str(BSTR str)
{
    return CONTAINING_RECORD((void *)str, bstr_t, u.str);
}

static inline bstr_cache_entry_t *get_cache_entry_from_idx(unsigned cache_idx)
{
    return bstr_cache_enabled && cache_idx < ARRAY_SIZE(bstr_cache) ? bstr_cache + cache_idx : NULL;
}

static inline bstr_cache_entry_t *get_cache_entry(size_t size)
{
    unsigned cache_idx = FIELD_OFFSET(bstr_t, u.ptr[size+sizeof(WCHAR)-1])/BUCKET_SIZE;
    return get_cache_entry_from_idx(cache_idx);
}

static inline bstr_cache_entry_t *get_cache_entry_from_alloc_size(SIZE_T alloc_size)
{
    unsigned cache_idx;
    if (alloc_size < BUCKET_SIZE) return NULL;
    cache_idx = (alloc_size - BUCKET_SIZE) / BUCKET_SIZE;
    return get_cache_entry_from_idx(cache_idx);
}

static bstr_t *alloc_bstr(size_t size)
{
    bstr_cache_entry_t *cache_entry = get_cache_entry(size);
    bstr_t *ret;

    if(cache_entry) {
        EnterCriticalSection(&cs_bstr_cache);

        if(!cache_entry->cnt) {
            cache_entry = get_cache_entry(size+BUCKET_SIZE);
            if(cache_entry && !cache_entry->cnt)
                cache_entry = NULL;
        }

        if(cache_entry) {
            ret = cache_entry->buf[cache_entry->head++];
            cache_entry->head %= BUCKET_BUFFER_SIZE;
            cache_entry->cnt--;
        }

        LeaveCriticalSection(&cs_bstr_cache);

        if(cache_entry) {
            if(WARN_ON(heap)) {
                size_t fill_size = (FIELD_OFFSET(bstr_t, u.ptr[size])+2*sizeof(WCHAR)-1) & ~(sizeof(WCHAR)-1);
                memset(ret, ARENA_INUSE_FILLER, fill_size);
                memset((char *)ret+fill_size, ARENA_TAIL_FILLER, bstr_alloc_size(size)-fill_size);
            }
            ret->size = size;
            return ret;
        }
    }

    ret = CoTaskMemAlloc(bstr_alloc_size(size));
    if(ret)
        ret->size = size;
    return ret;
}

/******************************************************************************
 *             SysStringLen  [OLEAUT32.7]
 *
 * Get the allocated length of a BSTR in wide characters.
 *
 * PARAMS
 *  str [I] BSTR to find the length of
 *
 * RETURNS
 *  The allocated length of str, or 0 if str is NULL.
 *
 * NOTES
 *  See BSTR.
 *  The returned length may be different from the length of the string as
 *  calculated by lstrlenW(), since it returns the length that was used to
 *  allocate the string by SysAllocStringLen().
 */
UINT WINAPI SysStringLen(BSTR str)
{
    return str ? bstr_from_str(str)->size/sizeof(WCHAR) : 0;
}

/******************************************************************************
 *             SysStringByteLen  [OLEAUT32.149]
 *
 * Get the allocated length of a BSTR in bytes.
 *
 * PARAMS
 *  str [I] BSTR to find the length of
 *
 * RETURNS
 *  The allocated length of str, or 0 if str is NULL.
 *
 * NOTES
 *  See SysStringLen(), BSTR().
 */
UINT WINAPI SysStringByteLen(BSTR str)
{
    return str ? bstr_from_str(str)->size : 0;
}

/******************************************************************************
 *      SysAllocString  [OLEAUT32.2]
 *
 * Create a BSTR from an OLESTR.
 *
 * PARAMS
 *  str [I] Source to create BSTR from
 *
 * RETURNS
 *  Success: A BSTR allocated with SysAllocStringLen().
 *  Failure: NULL, if oleStr is NULL.
 *
 * NOTES
 *  See BSTR.
 *  MSDN (October 2001) incorrectly states that NULL is returned if oleStr has
 *  a length of 0. Native Win32 and this implementation both return a valid
 *  empty BSTR in this case.
 */
BSTR WINAPI SysAllocString(LPCOLESTR str)
{
    if (!str) return 0;

    /* Delegate this to the SysAllocStringLen32 method. */
    return SysAllocStringLen(str, lstrlenW(str));
}

static inline IMalloc *get_malloc(void)
{
    static IMalloc *malloc;

    if (!malloc)
        CoGetMalloc(1, &malloc);

    return malloc;
}

/******************************************************************************
 *      SysFreeString   [OLEAUT32.6]
 *
 * Free a BSTR.
 *
 * PARAMS
 *  str [I] BSTR to free.
 *
 * RETURNS
 *  Nothing.
 *
 * NOTES
 *  See BSTR.
 *  str may be NULL, in which case this function does nothing.
 */
void WINAPI DECLSPEC_HOTPATCH SysFreeString(BSTR str)
{
    bstr_cache_entry_t *cache_entry;
    bstr_t *bstr;
    IMalloc *malloc = get_malloc();
    SIZE_T alloc_size;

    if(!str)
        return;

    bstr = bstr_from_str(str);

    alloc_size = IMalloc_GetSize(malloc, bstr);
    if (alloc_size == ~0UL)
        return;

    cache_entry = get_cache_entry_from_alloc_size(alloc_size);
    if(cache_entry) {
        unsigned i;

        EnterCriticalSection(&cs_bstr_cache);

        /* According to tests, freeing a string that's already in cache doesn't corrupt anything.
         * For that to work we need to search the cache. */
        for(i=0; i < cache_entry->cnt; i++) {
            if(cache_entry->buf[(cache_entry->head+i) % BUCKET_BUFFER_SIZE] == bstr) {
                WARN_(heap)("String already is in cache!\n");
                LeaveCriticalSection(&cs_bstr_cache);
                return;
            }
        }

        if(cache_entry->cnt < ARRAY_SIZE(cache_entry->buf)) {
            cache_entry->buf[(cache_entry->head+cache_entry->cnt) % BUCKET_BUFFER_SIZE] = bstr;
            cache_entry->cnt++;

            if(WARN_ON(heap)) {
                unsigned n = (alloc_size-FIELD_OFFSET(bstr_t, u.ptr))/sizeof(DWORD);
                for(i=0; i<n; i++)
                    bstr->u.dwptr[i] = ARENA_FREE_FILLER;
            }

            LeaveCriticalSection(&cs_bstr_cache);
            return;
        }

        LeaveCriticalSection(&cs_bstr_cache);
    }

    CoTaskMemFree(bstr);
}

/******************************************************************************
 *             SysAllocStringLen     [OLEAUT32.4]
 *
 * Create a BSTR from an OLESTR of a given wide character length.
 *
 * PARAMS
 *  str [I] Source to create BSTR from
 *  len [I] Length of oleStr in wide characters
 *
 * RETURNS
 *  Success: A newly allocated BSTR from SysAllocStringByteLen()
 *  Failure: NULL, if len is >= 0x80000000, or memory allocation fails.
 *
 * NOTES
 *  See BSTR(), SysAllocStringByteLen().
 */
BSTR WINAPI SysAllocStringLen(const OLECHAR *str, unsigned int len)
{
    bstr_t *bstr;
    DWORD size;

    /* Detect integer overflow. */
    if (len >= ((UINT_MAX-sizeof(WCHAR)-sizeof(DWORD))/sizeof(WCHAR)))
    return NULL;

    TRACE("%s\n", debugstr_wn(str, len));

    size = len*sizeof(WCHAR);
    bstr = alloc_bstr(size);
    if(!bstr)
        return NULL;

    if(str) {
        memcpy(bstr->u.str, str, size);
        bstr->u.str[len] = 0;
    }else {
        memset(bstr->u.str, 0, size+sizeof(WCHAR));
    }

    return bstr->u.str;
}

/******************************************************************************
 *             SysReAllocStringLen   [OLEAUT32.5]
 *
 * Change the length of a previously created BSTR.
 *
 * PARAMS
 *  old [O] BSTR to change the length of
 *  str [I] New source for pbstr
 *  len [I] Length of oleStr in wide characters
 *
 * RETURNS
 *  Success: 1. The size of pbstr is updated.
 *  Failure: 0, if len >= 0x80000000 or memory allocation fails.
 *
 * NOTES
 *  See BSTR(), SysAllocStringByteLen().
 *  *old may be changed by this function.
 */
int WINAPI SysReAllocStringLen(BSTR* old, const OLECHAR* str, unsigned int len)
{
    /* Detect integer overflow. */
    if (len >= ((UINT_MAX-sizeof(WCHAR)-sizeof(DWORD))/sizeof(WCHAR)))
    return FALSE;

    if (*old!=NULL) {
      DWORD newbytelen = len*sizeof(WCHAR);
      bstr_t *old_bstr = bstr_from_str(*old);
      bstr_t *bstr = CoTaskMemRealloc(old_bstr, bstr_alloc_size(newbytelen));

      if (!bstr) return FALSE;

      *old = bstr->u.str;
      bstr->size = newbytelen;
      /* The old string data is still there when str is NULL */
      if (str && old_bstr->u.str != str) memmove(bstr->u.str, str, newbytelen);
      bstr->u.str[len] = 0;
    } else {
      *old = SysAllocStringLen(str, len);
    }

    return TRUE;
}

/******************************************************************************
 *             SysAllocStringByteLen     [OLEAUT32.150]
 *
 * Create a BSTR from an OLESTR of a given byte length.
 *
 * PARAMS
 *  str [I] Source to create BSTR from
 *  len [I] Length of oleStr in bytes
 *
 * RETURNS
 *  Success: A newly allocated BSTR
 *  Failure: NULL, if len is >= 0x80000000, or memory allocation fails.
 *
 * NOTES
 *  -If len is 0 or oleStr is NULL the resulting string is empty ("").
 *  -This function always NUL terminates the resulting BSTR.
 *  -oleStr may be either an LPCSTR or LPCOLESTR, since it is copied
 *  without checking for a terminating NUL.
 *  See BSTR.
 */
BSTR WINAPI DECLSPEC_HOTPATCH SysAllocStringByteLen(LPCSTR str, UINT len)
{
    bstr_t *bstr;

    /* Detect integer overflow. */
    if (len >= (UINT_MAX-sizeof(WCHAR)-sizeof(DWORD)))
    return NULL;

    bstr = alloc_bstr(len);
    if(!bstr)
        return NULL;

    if(str) {
        memcpy(bstr->u.ptr, str, len);
        bstr->u.ptr[len] = 0;
    }else {
        memset(bstr->u.ptr, 0, len+1);
    }
    bstr->u.str[(len+sizeof(WCHAR)-1)/sizeof(WCHAR)] = 0;

    return bstr->u.str;
}

/******************************************************************************
 *      SysReAllocString    [OLEAUT32.3]
 *
 * Change the length of a previously created BSTR.
 *
 * PARAMS
 *  old [I/O] BSTR to change the length of
 *  str [I]   New source for pbstr
 *
 * RETURNS
 *  Success: 1
 *  Failure: 0.
 *
 * NOTES
 *  See BSTR(), SysAllocStringStringLen().
 */
INT WINAPI SysReAllocString(LPBSTR old,LPCOLESTR str)
{
    /*
     * Sanity check
     */
    if (old==NULL)
      return 0;

    /*
     * Make sure we free the old string.
     */
    SysFreeString(*old);

    /*
     * Allocate the new string
     */
    *old = SysAllocString(str);

     return 1;
}

/******************************************************************************
 *      SetOaNoCache (OLEAUT32.327)
 *
 * Instruct Ole Automation not to cache BSTR allocations.
 *
 * PARAMS
 *  None.
 *
 * RETURNS
 *  Nothing.
 *
 * NOTES
 *  SetOaNoCache does not release cached strings, so it leaks by design.
 */
void WINAPI SetOaNoCache(void)
{
    TRACE("\n");
    bstr_cache_enabled = FALSE;
}

static const WCHAR  _delimiter[] = {'!',0}; /* default delimiter apparently */
static const WCHAR  *pdelimiter = &_delimiter[0];

/***********************************************************************
 *      RegisterActiveObject (OLEAUT32.33)
 *
 * Registers an object in the global item table.
 *
 * PARAMS
 *  punk        [I] Object to register.
 *  rcid        [I] CLSID of the object.
 *  dwFlags     [I] Flags.
 *  pdwRegister [O] Address to store cookie of object registration in.
 *
 * RETURNS
 *  Success: S_OK.
 *  Failure: HRESULT code.
 */
HRESULT WINAPI DECLSPEC_HOTPATCH RegisterActiveObject(
    LPUNKNOWN punk,REFCLSID rcid,DWORD dwFlags,LPDWORD pdwRegister
) {
    WCHAR           guidbuf[80];
    HRESULT         ret;
    LPRUNNINGOBJECTTABLE    runobtable;
    LPMONIKER       moniker;
        DWORD                   rot_flags = ROTFLAGS_REGISTRATIONKEEPSALIVE; /* default registration is strong */

    StringFromGUID2(rcid,guidbuf,39);
    ret = CreateItemMoniker(pdelimiter,guidbuf,&moniker);
    if (FAILED(ret))
        return ret;
    ret = GetRunningObjectTable(0,&runobtable);
    if (FAILED(ret)) {
        IMoniker_Release(moniker);
        return ret;
    }
        if(dwFlags == ACTIVEOBJECT_WEAK)
          rot_flags = 0;
    ret = IRunningObjectTable_Register(runobtable,rot_flags,punk,moniker,pdwRegister);
    IRunningObjectTable_Release(runobtable);
    IMoniker_Release(moniker);
    return ret;
}

/***********************************************************************
 *      RevokeActiveObject (OLEAUT32.34)
 *
 * Revokes an object from the global item table.
 *
 * PARAMS
 *  xregister [I] Registration cookie.
 *  reserved  [I] Reserved. Set to NULL.
 *
 * RETURNS
 *  Success: S_OK.
 *  Failure: HRESULT code.
 */
HRESULT WINAPI DECLSPEC_HOTPATCH RevokeActiveObject(DWORD xregister,LPVOID reserved)
{
    LPRUNNINGOBJECTTABLE    runobtable;
    HRESULT         ret;

    ret = GetRunningObjectTable(0,&runobtable);
    if (FAILED(ret)) return ret;
    ret = IRunningObjectTable_Revoke(runobtable,xregister);
    if (SUCCEEDED(ret)) ret = S_OK;
    IRunningObjectTable_Release(runobtable);
    return ret;
}

/***********************************************************************
 *      GetActiveObject (OLEAUT32.35)
 *
 * Gets an object from the global item table.
 *
 * PARAMS
 *  rcid        [I] CLSID of the object.
 *  preserved   [I] Reserved. Set to NULL.
 *  ppunk       [O] Address to store object into.
 *
 * RETURNS
 *  Success: S_OK.
 *  Failure: HRESULT code.
 */
HRESULT WINAPI DECLSPEC_HOTPATCH GetActiveObject(REFCLSID rcid,LPVOID preserved,LPUNKNOWN *ppunk)
{
    WCHAR           guidbuf[80];
    HRESULT         ret;
    LPRUNNINGOBJECTTABLE    runobtable;
    LPMONIKER       moniker;

    StringFromGUID2(rcid,guidbuf,39);
    ret = CreateItemMoniker(pdelimiter,guidbuf,&moniker);
    if (FAILED(ret))
        return ret;
    ret = GetRunningObjectTable(0,&runobtable);
    if (FAILED(ret)) {
        IMoniker_Release(moniker);
        return ret;
    }
    ret = IRunningObjectTable_GetObject(runobtable,moniker,ppunk);
    IRunningObjectTable_Release(runobtable);
    IMoniker_Release(moniker);
    return ret;
}


/***********************************************************************
 *           OaBuildVersion           [OLEAUT32.170]
 *
 * Get the Ole Automation build version.
 *
 * PARAMS
 *  None
 *
 * RETURNS
 *  The build version.
 *
 * NOTES
 *  Known oleaut32.dll versions:
 *| OLE Ver.  Comments                   Date     Build Ver.
 *| --------  -------------------------  ----     ---------
 *| OLE 2.1   NT                         1993-95  10 3023
 *| OLE 2.1                                       10 3027
 *| Win32s    Ver 1.1e                            20 4049
 *| OLE 2.20  W95/NT                     1993-96  20 4112
 *| OLE 2.20  W95/NT                     1993-96  20 4118
 *| OLE 2.20  W95/NT                     1993-96  20 4122
 *| OLE 2.30  W95/NT                     1993-98  30 4265
 *| OLE 2.40  NT??                       1993-98  40 4267
 *| OLE 2.40  W98 SE orig. file          1993-98  40 4275
 *| OLE 2.40  W2K orig. file             1993-XX  40 4514
 *
 * Currently the versions returned are 2.20 for Win3.1, 2.30 for Win95 & NT 3.51,
 * and 2.40 for all later versions. The build number is maximum, i.e. 0xffff.
 */
ULONG WINAPI OaBuildVersion(void)
{
    switch(GetVersion() & 0x8000ffff)  /* mask off build number */
    {
    case 0x80000a03:  /* WIN31 */
        return MAKELONG(0xffff, 20);
    case 0x00003303:  /* NT351 */
        return MAKELONG(0xffff, 30);
    case 0x80000004:  /* WIN95; I'd like to use the "standard" w95 minor
                 version here (30), but as we still use w95
                 as default winver (which is good IMHO), I better
                 play safe and use the latest value for w95 for now.
                 Change this as soon as default winver gets changed
                 to something more recent */
    case 0x80000a04:  /* WIN98 */
    case 0x00000004:  /* NT40 */
    case 0x00000005:  /* W2K */
        return MAKELONG(0xffff, 40);
    case 0x00000105:  /* WinXP */
    case 0x00000006:  /* Vista */
    case 0x00000106:  /* Win7 */
        return MAKELONG(0xffff, 50);
    default:
        FIXME("Version value not known yet. Please investigate it !\n");
        return MAKELONG(0xffff, 40);  /* for now return the same value as for w2k */
    }
}

/******************************************************************************
 *      OleTranslateColor   [OLEAUT32.421]
 *
 * Convert an OLE_COLOR to a COLORREF.
 *
 * PARAMS
 *  clr       [I] Color to convert
 *  hpal      [I] Handle to a palette for the conversion
 *  pColorRef [O] Destination for converted color, or NULL to test if the conversion is ok
 *
 * RETURNS
 *  Success: S_OK. The conversion is ok, and pColorRef contains the converted color if non-NULL.
 *  Failure: E_INVALIDARG, if any argument is invalid.
 *
 * FIXME
 *  Document the conversion rules.
 */
HRESULT WINAPI OleTranslateColor(
  OLE_COLOR clr,
  HPALETTE  hpal,
  COLORREF* pColorRef)
{
  COLORREF colorref;
  BYTE b = HIBYTE(HIWORD(clr));

  TRACE("(%08x, %p, %p)\n", clr, hpal, pColorRef);

  /*
   * In case pColorRef is NULL, provide our own to simplify the code.
   */
  if (pColorRef == NULL)
    pColorRef = &colorref;

  switch (b)
  {
    case 0x00:
    {
      if (hpal != 0)
        *pColorRef =  PALETTERGB(GetRValue(clr),
                                 GetGValue(clr),
                                 GetBValue(clr));
      else
        *pColorRef = clr;

      break;
    }

    case 0x01:
    {
      if (hpal != 0)
      {
        PALETTEENTRY pe;
        /*
         * Validate the palette index.
         */
        if (GetPaletteEntries(hpal, LOWORD(clr), 1, &pe) == 0)
          return E_INVALIDARG;
      }

      *pColorRef = clr;

      break;
    }

    case 0x02:
      *pColorRef = clr;
      break;

    case 0x80:
    {
      int index = LOBYTE(LOWORD(clr));

      /*
       * Validate GetSysColor index.
       */
      if ((index < COLOR_SCROLLBAR) || (index > COLOR_MENUBAR))
        return E_INVALIDARG;

      *pColorRef =  GetSysColor(index);

      break;
    }

    default:
      return E_INVALIDARG;
  }

  return S_OK;
}

extern HRESULT WINAPI OLEAUTPS_DllGetClassObject(REFCLSID, REFIID, LPVOID *) DECLSPEC_HIDDEN;
extern BOOL WINAPI OLEAUTPS_DllMain(HINSTANCE, DWORD, LPVOID) DECLSPEC_HIDDEN;
extern HRESULT WINAPI OLEAUTPS_DllRegisterServer(void) DECLSPEC_HIDDEN;
extern HRESULT WINAPI OLEAUTPS_DllUnregisterServer(void) DECLSPEC_HIDDEN;

extern HRESULT WINAPI CreateProxyFromTypeInfo(ITypeInfo *typeinfo,
        IUnknown *outer, REFIID iid, IRpcProxyBuffer **proxy, void **obj);
extern HRESULT WINAPI CreateStubFromTypeInfo(ITypeInfo *typeinfo, REFIID iid,
        IUnknown *server, IRpcStubBuffer **stub);

struct ifacepsredirect_data
{
    ULONG size;
    DWORD mask;
    GUID  iid;
    ULONG nummethods;
    GUID  tlbid;
    GUID  base;
    ULONG name_len;
    ULONG name_offset;
};

struct tlibredirect_data
{
    ULONG  size;
    DWORD  res;
    ULONG  name_len;
    ULONG  name_offset;
    LANGID langid;
    WORD   flags;
    ULONG  help_len;
    ULONG  help_offset;
    WORD   major_version;
    WORD   minor_version;
};

static BOOL actctx_get_typelib_module(REFIID iid, WCHAR *module, DWORD len)
{
    struct ifacepsredirect_data *iface;
    struct tlibredirect_data *tlib;
    ACTCTX_SECTION_KEYED_DATA data;
    WCHAR *ptrW;

    data.cbSize = sizeof(data);
    if (!FindActCtxSectionGuid(0, NULL, ACTIVATION_CONTEXT_SECTION_COM_INTERFACE_REDIRECTION,
            iid, &data))
        return FALSE;

    iface = (struct ifacepsredirect_data *)data.lpData;
    if (!FindActCtxSectionGuid(0, NULL, ACTIVATION_CONTEXT_SECTION_COM_TYPE_LIBRARY_REDIRECTION,
            &iface->tlbid, &data))
        return FALSE;

    tlib = (struct tlibredirect_data *)data.lpData;
    ptrW = (WCHAR *)((BYTE *)data.lpSectionBase + tlib->name_offset);

    if (tlib->name_len/sizeof(WCHAR) >= len)
    {
        ERR("need larger module buffer, %u\n", tlib->name_len);
        return FALSE;
    }

    memcpy(module, ptrW, tlib->name_len);
    module[tlib->name_len/sizeof(WCHAR)] = 0;
    return TRUE;
}

static HRESULT reg_get_typelib_module(REFIID iid, WCHAR *module, DWORD len)
{
    REGSAM opposite = (sizeof(void*) == 8) ? KEY_WOW64_32KEY : KEY_WOW64_64KEY;
    char tlguid[200], typelibkey[300], interfacekey[300], ver[100], tlfn[260];
    DWORD tlguidlen, verlen, type;
    LONG tlfnlen, err;
    BOOL is_wow64;
    HKEY ikey;

    sprintf( interfacekey, "Interface\\{%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}\\Typelib",
        iid->Data1, iid->Data2, iid->Data3,
        iid->Data4[0], iid->Data4[1], iid->Data4[2], iid->Data4[3],
        iid->Data4[4], iid->Data4[5], iid->Data4[6], iid->Data4[7]
    );

    err = RegOpenKeyExA(HKEY_CLASSES_ROOT,interfacekey,0,KEY_READ,&ikey);
    if (err && (opposite == KEY_WOW64_32KEY || (IsWow64Process(GetCurrentProcess(), &is_wow64)
                                                && is_wow64)))
        err = RegOpenKeyExA(HKEY_CLASSES_ROOT,interfacekey,0,KEY_READ|opposite,&ikey);

    if (err)
    {
        ERR("No %s key found.\n", interfacekey);
        return E_FAIL;
    }

    tlguidlen = sizeof(tlguid);
    if (RegQueryValueExA(ikey, NULL, NULL, &type, (BYTE *)tlguid, &tlguidlen))
    {
        ERR("Getting typelib guid failed.\n");
        RegCloseKey(ikey);
        return E_FAIL;
    }

    verlen = sizeof(ver);
    if (RegQueryValueExA(ikey, "Version", NULL, &type, (BYTE *)ver, &verlen))
    {
        ERR("Could not get version value?\n");
        RegCloseKey(ikey);
        return E_FAIL;
    }

    RegCloseKey(ikey);

#ifndef __REACTOS__
    sprintf(typelibkey, "Typelib\\%s\\%s\\0\\win%u", tlguid, ver, sizeof(void *) == 8 ? 64 : 32);
#else
    snprintf(typelibkey, sizeof(typelibkey), "Typelib\\%s\\%s\\0\\win%u", tlguid, ver, sizeof(void *) == 8 ? 64 : 32);
#endif /* __REACTOS__ */
    tlfnlen = sizeof(tlfn);
    if (RegQueryValueA(HKEY_CLASSES_ROOT, typelibkey, tlfn, &tlfnlen))
    {
#ifdef _WIN64
        sprintf(typelibkey, "Typelib\\%s\\%s\\0\\win32", tlguid, ver);
        tlfnlen = sizeof(tlfn);
        if (RegQueryValueA(HKEY_CLASSES_ROOT, typelibkey, tlfn, &tlfnlen))
        {
#endif
            ERR("Could not get typelib fn?\n");
            return E_FAIL;
#ifdef _WIN64
        }
#endif
    }
    MultiByteToWideChar(CP_ACP, 0, tlfn, -1, module, len);
    return S_OK;
}

static HRESULT get_typeinfo_for_iid(REFIID iid, ITypeInfo **typeinfo)
{
    WCHAR module[MAX_PATH];
    ITypeLib *typelib;
    HRESULT hr;

    *typeinfo = NULL;

    module[0] = 0;
    if (!actctx_get_typelib_module(iid, module, ARRAY_SIZE(module)))
    {
        hr = reg_get_typelib_module(iid, module, ARRAY_SIZE(module));
        if (FAILED(hr))
            return hr;
    }

    hr = LoadTypeLib(module, &typelib);
    if (hr != S_OK) {
        ERR("Failed to load typelib for %s, but it should be there.\n", debugstr_guid(iid));
        return hr;
    }

    hr = ITypeLib_GetTypeInfoOfGuid(typelib, iid, typeinfo);
    ITypeLib_Release(typelib);
    if (hr != S_OK)
        ERR("typelib does not contain info for %s\n", debugstr_guid(iid));

    return hr;
}

static HRESULT WINAPI dispatch_typelib_ps_QueryInterface(IPSFactoryBuffer *iface, REFIID iid, void **out)
{
    if (IsEqualIID(iid, &IID_IPSFactoryBuffer) || IsEqualIID(iid, &IID_IUnknown))
    {
        *out = iface;
        return S_OK;
    }

    FIXME("No interface for %s.\n", debugstr_guid(iid));
    *out = NULL;
    return E_NOINTERFACE;
}

static ULONG WINAPI dispatch_typelib_ps_AddRef(IPSFactoryBuffer *iface)
{
    return 2;
}

static ULONG WINAPI dispatch_typelib_ps_Release(IPSFactoryBuffer *iface)
{
    return 1;
}

static HRESULT dispatch_create_proxy(IUnknown *outer, IRpcProxyBuffer **proxy, void **out)
{
    IPSFactoryBuffer *factory;
    HRESULT hr;

    hr = OLEAUTPS_DllGetClassObject(&CLSID_PSFactoryBuffer, &IID_IPSFactoryBuffer, (void **)&factory);
    if (FAILED(hr)) return hr;

    hr = IPSFactoryBuffer_CreateProxy(factory, outer, &IID_IDispatch, proxy, out);
    IPSFactoryBuffer_Release(factory);
    return hr;
}

static HRESULT WINAPI dispatch_typelib_ps_CreateProxy(IPSFactoryBuffer *iface,
    IUnknown *outer, REFIID iid, IRpcProxyBuffer **proxy, void **out)
{
    ITypeInfo *typeinfo;
    TYPEATTR *attr;
    HRESULT hr;

    if (IsEqualGUID(iid, &IID_IDispatch))
        return dispatch_create_proxy(outer, proxy, out);

    hr = get_typeinfo_for_iid(iid, &typeinfo);
    if (FAILED(hr)) return hr;

    hr = ITypeInfo_GetTypeAttr(typeinfo, &attr);
    if (FAILED(hr))
    {
        ITypeInfo_Release(typeinfo);
        return hr;
    }

    if (attr->typekind == TKIND_INTERFACE || (attr->wTypeFlags & TYPEFLAG_FDUAL))
        hr = CreateProxyFromTypeInfo(typeinfo, outer, iid, proxy, out);
    else
        hr = dispatch_create_proxy(outer, proxy, out);

    if (FAILED(hr))
        ERR("Failed to create proxy, hr %#x.\n", hr);

    ITypeInfo_ReleaseTypeAttr(typeinfo, attr);
    ITypeInfo_Release(typeinfo);
    return hr;
}

static HRESULT dispatch_create_stub(IUnknown *server, IRpcStubBuffer **stub)
{
    IPSFactoryBuffer *factory;
    HRESULT hr;

    hr = OLEAUTPS_DllGetClassObject(&CLSID_PSFactoryBuffer, &IID_IPSFactoryBuffer, (void **)&factory);
    if (FAILED(hr)) return hr;

    hr = IPSFactoryBuffer_CreateStub(factory, &IID_IDispatch, server, stub);
    IPSFactoryBuffer_Release(factory);
    return hr;
}

static HRESULT WINAPI dispatch_typelib_ps_CreateStub(IPSFactoryBuffer *iface,
    REFIID iid, IUnknown *server, IRpcStubBuffer **stub)
{
    ITypeInfo *typeinfo;
    TYPEATTR *attr;
    HRESULT hr;

    if (IsEqualGUID(iid, &IID_IDispatch))
        return dispatch_create_stub(server, stub);

    hr = get_typeinfo_for_iid(iid, &typeinfo);
    if (FAILED(hr)) return hr;

    hr = ITypeInfo_GetTypeAttr(typeinfo, &attr);
    if (FAILED(hr))
    {
        ITypeInfo_Release(typeinfo);
        return hr;
    }

    if (attr->typekind == TKIND_INTERFACE || (attr->wTypeFlags & TYPEFLAG_FDUAL))
        hr = CreateStubFromTypeInfo(typeinfo, iid, server, stub);
    else
        hr = dispatch_create_stub(server, stub);

    if (FAILED(hr))
        ERR("Failed to create proxy, hr %#x.\n", hr);

    ITypeInfo_ReleaseTypeAttr(typeinfo, attr);
    ITypeInfo_Release(typeinfo);
    return hr;
}

static const IPSFactoryBufferVtbl dispatch_typelib_ps_vtbl =
{
    dispatch_typelib_ps_QueryInterface,
    dispatch_typelib_ps_AddRef,
    dispatch_typelib_ps_Release,
    dispatch_typelib_ps_CreateProxy,
    dispatch_typelib_ps_CreateStub,
};

static IPSFactoryBuffer dispatch_typelib_ps = { &dispatch_typelib_ps_vtbl };

extern void _get_STDFONT_CF(LPVOID *);
extern void _get_STDPIC_CF(LPVOID *);

/***********************************************************************
 *      DllGetClassObject (OLEAUT32.@)
 */
HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID iid, LPVOID *ppv)
{
    *ppv = NULL;
    if (IsEqualGUID(rclsid,&CLSID_StdFont)) {
    if (IsEqualGUID(iid,&IID_IClassFactory)) {
        _get_STDFONT_CF(ppv);
        IClassFactory_AddRef((IClassFactory*)*ppv);
        return S_OK;
    }
    }
    if (IsEqualGUID(rclsid,&CLSID_StdPicture)) {
    if (IsEqualGUID(iid,&IID_IClassFactory)) {
        _get_STDPIC_CF(ppv);
        IClassFactory_AddRef((IClassFactory*)*ppv);
        return S_OK;
    }
    }

    if (IsEqualGUID(rclsid, &CLSID_PSDispatch) || IsEqualGUID(rclsid, &CLSID_PSOAInterface))
        return IPSFactoryBuffer_QueryInterface(&dispatch_typelib_ps, iid, ppv);

    if (IsEqualCLSID(rclsid, &CLSID_PSTypeComp) ||
        IsEqualCLSID(rclsid, &CLSID_PSTypeInfo) ||
        IsEqualCLSID(rclsid, &CLSID_PSTypeLib) ||
        IsEqualCLSID(rclsid, &CLSID_PSDispatch) ||
        IsEqualCLSID(rclsid, &CLSID_PSEnumVariant))
        return OLEAUTPS_DllGetClassObject(&CLSID_PSFactoryBuffer, iid, ppv);

    return OLEAUTPS_DllGetClassObject(rclsid, iid, ppv);
}

/***********************************************************************
 *      DllCanUnloadNow (OLEAUT32.@)
 *
 * Determine if this dll can be unloaded from the callers address space.
 *
 * PARAMS
 *  None.
 *
 * RETURNS
 *  Always returns S_FALSE. This dll cannot be unloaded.
 */
HRESULT WINAPI DllCanUnloadNow(void)
{
    return S_FALSE;
}

/*****************************************************************************
 *              DllMain         [OLEAUT32.@]
 */
BOOL WINAPI DllMain(HINSTANCE hInstDll, DWORD fdwReason, LPVOID lpvReserved)
{
    static const WCHAR oanocacheW[] = {'o','a','n','o','c','a','c','h','e',0};

    if(fdwReason == DLL_PROCESS_ATTACH)
        bstr_cache_enabled = !GetEnvironmentVariableW(oanocacheW, NULL, 0);

    return OLEAUTPS_DllMain( hInstDll, fdwReason, lpvReserved );
}

/***********************************************************************
 *      DllRegisterServer (OLEAUT32.@)
 */
HRESULT WINAPI DllRegisterServer(void)
{
    return OLEAUTPS_DllRegisterServer();
}

/***********************************************************************
 *      DllUnregisterServer (OLEAUT32.@)
 */
HRESULT WINAPI DllUnregisterServer(void)
{
    return OLEAUTPS_DllUnregisterServer();
}

/***********************************************************************
 *              OleIconToCursor (OLEAUT32.415)
 */
HCURSOR WINAPI OleIconToCursor( HINSTANCE hinstExe, HICON hIcon)
{
    FIXME("(%p,%p), partially implemented.\n",hinstExe,hIcon);
    /* FIXME: make an extended conversation from HICON to HCURSOR */
    return CopyCursor(hIcon);
}

/***********************************************************************
 *              GetAltMonthNames (OLEAUT32.@)
 */
HRESULT WINAPI GetAltMonthNames(LCID lcid, LPOLESTR **str)
{
    static const WCHAR ar_month1W[] = {0x645,0x62d,0x631,0x645,0};
    static const WCHAR ar_month2W[] = {0x635,0x641,0x631,0};
    static const WCHAR ar_month3W[] = {0x631,0x628,0x64a,0x639,' ',0x627,0x644,0x627,0x648,0x644,0};
    static const WCHAR ar_month4W[] = {0x631,0x628,0x64a,0x639,' ',0x627,0x644,0x62b,0x627,0x646,0x64a,0};
    static const WCHAR ar_month5W[] = {0x62c,0x645,0x627,0x62f,0x649,' ',0x627,0x644,0x627,0x648,0x644,0x649,0};
    static const WCHAR ar_month6W[] = {0x62c,0x645,0x627,0x62f,0x649,' ',0x627,0x644,0x62b,0x627,0x646,0x64a,0x629,0};
    static const WCHAR ar_month7W[] = {0x631,0x62c,0x628,0};
    static const WCHAR ar_month8W[] = {0x634,0x639,0x628,0x627,0x646,0};
    static const WCHAR ar_month9W[] = {0x631,0x645,0x636,0x627,0x646,0};
    static const WCHAR ar_month10W[] = {0x634,0x648,0x627,0x643,0};
    static const WCHAR ar_month11W[] = {0x630,0x648,' ',0x627,0x644,0x642,0x639,0x62f,0x629,0};
    static const WCHAR ar_month12W[] = {0x630,0x648,' ',0x627,0x644,0x62d,0x62c,0x629,0};

    static const WCHAR *arabic_hijri[] =
    {
        ar_month1W,
        ar_month2W,
        ar_month3W,
        ar_month4W,
        ar_month5W,
        ar_month6W,
        ar_month7W,
        ar_month8W,
        ar_month9W,
        ar_month10W,
        ar_month11W,
        ar_month12W,
        NULL
    };

    static const WCHAR pl_month1W[] = {'s','t','y','c','z','n','i','a',0};
    static const WCHAR pl_month2W[] = {'l','u','t','e','g','o',0};
    static const WCHAR pl_month3W[] = {'m','a','r','c','a',0};
    static const WCHAR pl_month4W[] = {'k','w','i','e','t','n','i','a',0};
    static const WCHAR pl_month5W[] = {'m','a','j','a',0};
    static const WCHAR pl_month6W[] = {'c','z','e','r','w','c','a',0};
    static const WCHAR pl_month7W[] = {'l','i','p','c','a',0};
    static const WCHAR pl_month8W[] = {'s','i','e','r','p','n','i','a',0};
    static const WCHAR pl_month9W[] = {'w','r','z','e',0x15b,'n','i','a',0};
    static const WCHAR pl_month10W[] = {'p','a',0x17a,'d','z','i','e','r','n','i','k','a',0};
    static const WCHAR pl_month11W[] = {'l','i','s','t','o','p','a','d','a',0};
    static const WCHAR pl_month12W[] = {'g','r','u','d','n','i','a',0};

    static const WCHAR *polish_genitive_names[] =
    {
        pl_month1W,
        pl_month2W,
        pl_month3W,
        pl_month4W,
        pl_month5W,
        pl_month6W,
        pl_month7W,
        pl_month8W,
        pl_month9W,
        pl_month10W,
        pl_month11W,
        pl_month12W,
        NULL
    };

    static const WCHAR ru_month1W[] = {0x44f,0x43d,0x432,0x430,0x440,0x44f,0};
    static const WCHAR ru_month2W[] = {0x444,0x435,0x432,0x440,0x430,0x43b,0x44f,0};
    static const WCHAR ru_month3W[] = {0x43c,0x430,0x440,0x442,0x430,0};
    static const WCHAR ru_month4W[] = {0x430,0x43f,0x440,0x435,0x43b,0x44f,0};
    static const WCHAR ru_month5W[] = {0x43c,0x430,0x44f,0};
    static const WCHAR ru_month6W[] = {0x438,0x44e,0x43d,0x44f,0};
    static const WCHAR ru_month7W[] = {0x438,0x44e,0x43b,0x44f,0};
    static const WCHAR ru_month8W[] = {0x430,0x432,0x433,0x443,0x441,0x442,0x430,0};
    static const WCHAR ru_month9W[] = {0x441,0x435,0x43d,0x442,0x44f,0x431,0x440,0x44f,0};
    static const WCHAR ru_month10W[] = {0x43e,0x43a,0x442,0x44f,0x431,0x440,0x44f,0};
    static const WCHAR ru_month11W[] = {0x43d,0x43e,0x44f,0x431,0x440,0x44f,0};
    static const WCHAR ru_month12W[] = {0x434,0x435,0x43a,0x430,0x431,0x440,0x44f,0};

    static const WCHAR *russian_genitive_names[] =
    {
        ru_month1W,
        ru_month2W,
        ru_month3W,
        ru_month4W,
        ru_month5W,
        ru_month6W,
        ru_month7W,
        ru_month8W,
        ru_month9W,
        ru_month10W,
        ru_month11W,
        ru_month12W,
        NULL
    };

    TRACE("%#x, %p\n", lcid, str);

    if (PRIMARYLANGID(LANGIDFROMLCID(lcid)) == LANG_ARABIC)
        *str = (LPOLESTR *)arabic_hijri;
    else if (PRIMARYLANGID(LANGIDFROMLCID(lcid)) == LANG_POLISH)
        *str = (LPOLESTR *)polish_genitive_names;
    else if (PRIMARYLANGID(LANGIDFROMLCID(lcid)) == LANG_RUSSIAN)
        *str = (LPOLESTR *)russian_genitive_names;
    else
        *str = NULL;

    return S_OK;
}