HRESULT BIGBLOCKFILE_ReadAt(LPBIGBLOCKFILE This, ULARGE_INTEGER offset,
void* buffer, ULONG size, ULONG* bytesRead)
{
if (This->fileBased)
return ImplBIGBLOCKFILE_ReadAt(This,offset,buffer,size,bytesRead);
else
return ILockBytes_ReadAt(This->pLkbyt,offset,buffer,size,bytesRead);
}
/******************************************************************************
* GetHGlobalFromILockBytes [OLE32.@]
*
* Retrieve a global memory handle to a byte array object created
* using the CreateILockBytesOnHGlobal function.
*
* PARAMS
* plkbyt [ I] Pointer to the ILockBytes interface on byte array object
* phglobal [ O] Address to store a global memory handle
* RETURNS
* S_OK if *phglobal has a correct value
* E_INVALIDARG if any parameters are invalid
*
*/
HRESULT WINAPI GetHGlobalFromILockBytes(ILockBytes* plkbyt, HGLOBAL* phglobal)
{
HGLOBALLockBytesImpl* const pMemLockBytes = (HGLOBALLockBytesImpl*)plkbyt;
STATSTG stbuf;
HRESULT hres;
ULARGE_INTEGER start;
ULONG xread;
*phglobal = 0;
if (pMemLockBytes->lpVtbl == &HGLOBALLockBytesImpl_Vtbl) {
*phglobal = pMemLockBytes->supportHandle;
if (*phglobal == 0)
return E_INVALIDARG;
return S_OK;
}
/* It is not our lockbytes implementation, so use a more generic way */
hres = ILockBytes_Stat(plkbyt,&stbuf,0);
if (hres != S_OK) {
ERR("Cannot ILockBytes_Stat, %lx\n",hres);
return hres;
}
FIXME("cbSize is %ld\n",stbuf.cbSize.u.LowPart);
*phglobal = GlobalAlloc( GMEM_MOVEABLE|GMEM_SHARE, stbuf.cbSize.u.LowPart);
if (!*phglobal)
return E_INVALIDARG;
memset(&start,0,sizeof(start));
hres = ILockBytes_ReadAt(plkbyt, start, GlobalLock(*phglobal), stbuf.cbSize.u.LowPart, &xread);
GlobalUnlock(*phglobal);
if (hres != S_OK) {
FIXME("%p->ReadAt failed with %lx\n",plkbyt,hres);
return hres;
}
if (stbuf.cbSize.u.LowPart != xread) {
FIXME("Read size is not requested size %ld vs %ld?\n",stbuf.cbSize.u.LowPart, xread);
}
return S_OK;
}
