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wine/dlls/oleaut32/oleaut.c
Jon Griffiths c50d8743fa Ensure DllCanUnloadNow is a truly void function, and give it a unique 
name so it can be documented per-dll.
2004-11-30 17:40:51 +00:00

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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdarg.h>
#include <string.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 "tmarshal.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(ole);
/* The OLE Automation ProxyStub Interface Class (aka Typelib Marshaler) */
extern const GUID CLSID_PSOAInterface;
/* IDispatch marshaler */
extern const GUID CLSID_PSDispatch;
static BOOL BSTR_bCache = TRUE; /* Cache allocations to minimise alloc calls? */
HMODULE OLEAUT32_hModule = NULL;
/******************************************************************************
* 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.
*/
/******************************************************************************
* 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)
{
DWORD* bufferPointer;
if (!str) return 0;
/*
* The length of the string (in bytes) is contained in a DWORD placed
* just before the BSTR pointer
*/
bufferPointer = (DWORD*)str;
bufferPointer--;
return (int)(*bufferPointer/sizeof(WCHAR));
}
/******************************************************************************
* 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)
{
DWORD* bufferPointer;
if (!str) return 0;
/*
* The length of the string (in bytes) is contained in a DWORD placed
* just before the BSTR pointer
*/
bufferPointer = (DWORD*)str;
bufferPointer--;
return (int)(*bufferPointer);
}
/******************************************************************************
* 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));
}
/******************************************************************************
* 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 SysFreeString(BSTR str)
{
DWORD* bufferPointer;
/* NULL is a valid parameter */
if(!str) return;
/*
* We have to be careful when we free a BSTR pointer, it points to
* the beginning of the string but it skips the byte count contained
* before the string.
*/
bufferPointer = (DWORD*)str;
bufferPointer--;
/*
* Free the memory from its "real" origin.
*/
HeapFree(GetProcessHeap(), 0, bufferPointer);
}
/******************************************************************************
* 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)
{
DWORD bufferSize;
DWORD* newBuffer;
WCHAR* stringBuffer;
/*
* Find the length of the buffer passed-in in bytes.
*/
bufferSize = len * sizeof (WCHAR);
/*
* Allocate a new buffer to hold the string.
* don't forget to keep an empty spot at the beginning of the
* buffer for the character count and an extra character at the
* end for the NULL.
*/
newBuffer = (DWORD*)HeapAlloc(GetProcessHeap(),
0,
bufferSize + sizeof(WCHAR) + sizeof(DWORD));
/*
* If the memory allocation failed, return a null pointer.
*/
if (newBuffer==0)
return 0;
/*
* Copy the length of the string in the placeholder.
*/
*newBuffer = bufferSize;
/*
* Skip the byte count.
*/
newBuffer++;
/*
* Copy the information in the buffer.
* Since it is valid to pass a NULL pointer here, we'll initialize the
* buffer to nul if it is the case.
*/
if (str != 0)
memcpy(newBuffer, str, bufferSize);
else
memset(newBuffer, 0, bufferSize);
/*
* Make sure that there is a nul character at the end of the
* string.
*/
stringBuffer = (WCHAR*)newBuffer;
stringBuffer[len] = L'\0';
return (LPWSTR)stringBuffer;
}
/******************************************************************************
* 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().
* *pbstr may be changed by this function.
*/
int WINAPI SysReAllocStringLen(BSTR* old, const OLECHAR* str, unsigned int len)
{
if (*old!=NULL) {
DWORD newbytelen = len*sizeof(WCHAR);
DWORD *ptr = HeapReAlloc(GetProcessHeap(),0,((DWORD*)*old)-1,newbytelen+sizeof(WCHAR)+sizeof(DWORD));
*old = (BSTR)(ptr+1);
*ptr = newbytelen;
if (str) {
memcpy(*old, str, newbytelen);
(*old)[len] = 0;
} else {
/* Subtle hidden feature: The old string data is still there
* when 'in' is NULL!
* Some Microsoft program needs it.
*/
}
} else {
/*
* Allocate the new string
*/
*old = SysAllocStringLen(str, len);
}
return 1;
}
/******************************************************************************
* 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 SysAllocStringByteLen(LPCSTR str, UINT len)
{
DWORD* newBuffer;
char* stringBuffer;
/*
* Allocate a new buffer to hold the string.
* don't forget to keep an empty spot at the beginning of the
* buffer for the character count and an extra character at the
* end for the NULL.
*/
newBuffer = (DWORD*)HeapAlloc(GetProcessHeap(),
0,
len + sizeof(WCHAR) + sizeof(DWORD));
/*
* If the memory allocation failed, return a null pointer.
*/
if (newBuffer==0)
return 0;
/*
* Copy the length of the string in the placeholder.
*/
*newBuffer = len;
/*
* Skip the byte count.
*/
newBuffer++;
/*
* Copy the information in the buffer.
* Since it is valid to pass a NULL pointer here, we'll initialize the
* buffer to nul if it is the case.
*/
if (str != 0)
memcpy(newBuffer, str, len);
/*
* Make sure that there is a nul character at the end of the
* string.
*/
stringBuffer = (char *)newBuffer;
stringBuffer[len] = 0;
stringBuffer[len+1] = 0;
return (LPWSTR)stringBuffer;
}
/******************************************************************************
* 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.
*/
if (*old!=NULL)
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
* See BSTR.
*/
void WINAPI SetOaNoCache(void)
{
BSTR_bCache = FALSE;
}
static WCHAR _delimiter[2] = {'!',0}; /* default delimiter apparently */
static WCHAR *pdelimiter = &_delimiter[0];
/***********************************************************************
* RegisterActiveObject (OLEAUT32.33)
*/
HRESULT WINAPI RegisterActiveObject(
LPUNKNOWN punk,REFCLSID rcid,DWORD dwFlags,LPDWORD pdwRegister
) {
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_Register(runobtable,dwFlags,punk,moniker,pdwRegister);
IRunningObjectTable_Release(runobtable);
IMoniker_Release(moniker);
return ret;
}
/***********************************************************************
* RevokeActiveObject (OLEAUT32.34)
*/
HRESULT WINAPI 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)
*/
HRESULT WINAPI 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()
{
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);
default:
ERR("Version value not known yet. Please investigate it !\n");
return 0x0;
}
}
/******************************************************************************
* GetRecordInfoFromGuids [OLEAUT32.322]
*
* RETURNS
* Success: S_OK
* Failure: E_INVALIDARG, if any argument is invalid.
*
* BUGS
* Unimplemented
*/
HRESULT WINAPI GetRecordInfoFromGuids(
REFGUID rGuidTypeLib,
ULONG uVerMajor,
ULONG uVerMinor,
LCID lcid,
REFGUID rGuidTypeInfo,
IRecordInfo** ppRecInfo)
{
FIXME("(%p,%ld,%ld,%ld,%p,%p),stub!\n",rGuidTypeLib, uVerMajor, uVerMinor, lcid, rGuidTypeInfo, ppRecInfo);
return E_NOTIMPL;
}
/******************************************************************************
* 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("(%08lx, %p, %p):stub\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 OLEAUTPS_DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv);
extern void _get_STDFONT_CF(LPVOID);
extern void _get_STDPIC_CF(LPVOID);
/***********************************************************************
* DllGetClassObject (OLEAUT32.1)
*/
HRESULT WINAPI OLEAUT32_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)) {
return OLEAUTPS_DllGetClassObject(rclsid,iid,ppv);
}
if (IsEqualGUID(rclsid,&CLSID_PSOAInterface)) {
if (S_OK==TypeLibFac_DllGetClassObject(rclsid,iid,ppv))
return S_OK;
/*FALLTHROUGH*/
}
FIXME("\n\tCLSID:\t%s,\n\tIID:\t%s\n",debugstr_guid(rclsid),debugstr_guid(iid));
return CLASS_E_CLASSNOTAVAILABLE;
}
/***********************************************************************
* DllCanUnloadNow (OLEAUT32.410)
*
* 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 OLEAUT32_DllCanUnloadNow(void)
{
return S_FALSE;
}
/*****************************************************************************
* DllMain [OLEAUT32.@]
*/
BOOL WINAPI DllMain(HINSTANCE hInstDll, DWORD fdwReason, LPVOID lpvReserved)
{
TRACE("(%p,%lu,%p)\n", hInstDll, fdwReason, lpvReserved);
switch (fdwReason) {
case DLL_PROCESS_ATTACH:
DisableThreadLibraryCalls(hInstDll);
OLEAUT32_hModule = (HMODULE)hInstDll;
break;
case DLL_PROCESS_DETACH:
break;
};
return TRUE;
}
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