498 lines
14 KiB
C++
498 lines
14 KiB
C++
/*---------------------------------------------------------------------------
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File: VarData.cpp
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Comments: CVarData represents one level in the VarSet. It has a variant
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value, and a map containing one or more subvalues.
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(c) Copyright 1995-1998, Mission Critical Software, Inc., All Rights Reserved
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Proprietary and confidential to Mission Critical Software, Inc.
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REVISION LOG ENTRY
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Revision By: Christy Boles
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Revised on 11/19/98 17:24:56
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---------------------------------------------------------------------------
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*/
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#include "stdafx.h"
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#include "VarData.h"
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#include "VarMap.h"
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#include "DotStr.hpp"
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#ifdef STRIPPED_VARSET
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#include "Varset.h"
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#include "NoMcs.h"
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#else
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#include <VarSet.h>
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#include "McString.h"
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#include "McLog.h"
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using namespace McString;
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#endif
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#include "VSet.h"
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#include <comdef.h>
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#ifdef _DEBUG
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#define new DEBUG_NEW
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#undef THIS_FILE
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static char THIS_FILE[] = __FILE__;
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#endif
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int
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CVarData::SetData(
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CString key, // in - key value
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VARIANT * var, // in - data value
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BOOL bCoerce, // in - flag, whether to coerce to a persistable value
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HRESULT * pResult // out- optional return code
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)
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{
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int nCreated = 0;
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_variant_t newVal(var);
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HRESULT hr = S_OK;
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if ( key.IsEmpty() )
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{
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m_cs.Lock();
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// set my data value
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if ( ! bCoerce )
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{
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m_var.Copy(&newVal);
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}
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else
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{
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// need to coerce the value to an appropriate type
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if ( var->vt == VT_DISPATCH || var->vt == VT_UNKNOWN )
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{
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// if it's an IUnknown, see if it supports IDispatch
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IDispatchPtr pDisp;
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pDisp = newVal;
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if ( pDisp != NULL )
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{
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// the object supports IDispatch
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// try to get the default property
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_variant_t defPropVar;
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DISPPARAMS dispParamsNoArgs = {NULL, NULL, 0, 0};
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hr = pDisp->Invoke(0,
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IID_NULL,
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LOCALE_USER_DEFAULT,
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DISPATCH_PROPERTYGET,
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&dispParamsNoArgs,
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&defPropVar,
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NULL,
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NULL);
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if ( SUCCEEDED(hr) )
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{
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// we got the default property
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newVal = defPropVar;
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}
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else
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{
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MC_LOG("VarSet::put - unable to retrieve default property for IDispatch object. Put operation failed, hr=" << hr << "returning E_INVALIDARG");
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hr = E_INVALIDARG;
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}
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}
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}
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if ( SUCCEEDED(hr) )
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{
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if ( newVal.vt & VT_BYREF )
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{
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if ( newVal.vt == (VT_VARIANT | VT_BYREF) )
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{
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m_var.Copy(newVal.pvarVal);
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}
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else
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{
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hr = ::VariantChangeType(&newVal,&newVal,0,newVal.vt & ~VT_BYREF);
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if ( SUCCEEDED(hr) )
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{
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m_var.Copy(&newVal);
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}
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else
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{
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MC_LOG("VarSet::put - failed to dereference variant of type " << newVal.vt << ". Put operation failed, hr=" <<hr);
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hr = E_INVALIDARG;
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}
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}
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}
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else
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{
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m_var.Copy(&newVal);
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}
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}
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}
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m_cs.Unlock();
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}
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else
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{
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// set the value for a child
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CDottedString s(key);
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CString seg;
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CVarData * pObj;
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CVarData * pChild;
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s.GetSegment(0,seg);
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m_cs.Lock();
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if ( ! m_children )
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{
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// create the child map if it does not exist
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m_children = new CMapStringToVar(IsCaseSensitive(),IsIndexed(), AllowRehashing() );
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if (!m_children)
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{
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m_cs.Unlock();
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return nCreated;
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}
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}
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// look for the first segment of the entry in the child map
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if ( ! m_children->Lookup(seg,pObj) )
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{
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// add it if it doesn't exist
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pChild = new CVarData;
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if (!pChild)
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{
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m_cs.Unlock();
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return nCreated;
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}
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pChild->SetCaseSensitive(IsCaseSensitive());
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pChild->SetAllowRehashing(AllowRehashing());
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pChild->SetIndexed(IsIndexed());
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m_children->SetAt(seg,pChild);
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nCreated++; // we added a new node
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}
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else
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{
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pChild = (CVarData*)pObj;
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}
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// strip off the first segment from the property name, and call SetData
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// recursively on the child item
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nCreated += pChild->SetData(key.Right(key.GetLength() - seg.GetLength()-1),var,bCoerce,&hr);
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m_cs.Unlock();
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}
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if ( pResult )
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{
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(*pResult) = hr;
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}
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return nCreated;
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}
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void
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CVarData::RemoveAll()
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{
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// remove all children from the map
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m_cs.Lock();
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if ( m_children && ! m_children->IsEmpty() )
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{
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// Enumerate the MAP and delete each object
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POSITION pos;
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CString key;
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CVarData * pObj;
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pos = m_children->GetStartPosition();
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while ( pos )
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{
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m_children->GetNextAssoc(pos,key,pObj);
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if ( pObj )
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{
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delete pObj;
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}
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}
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m_children->RemoveAll();
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}
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if ( m_children )
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{
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delete m_children;
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m_children = NULL;
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}
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m_cs.Unlock();
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}
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BOOL // ret- TRUE if key exists in the map
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CVarData::Lookup(
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LPCTSTR key, // in - key to search for
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CVarData *& rValue // out- value
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)
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{
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if ( m_children )
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{
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return m_children->Lookup(key,rValue);
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}
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else
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{
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return FALSE;
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}
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}
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BOOL // ret- TRUE if there are sub-items for this node
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CVarData::HasChildren()
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{
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return m_children && !m_children->IsEmpty();
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}
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void
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CVarData::SetAt(
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LPCTSTR key, // in - key
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CVarData * newValue // in - new value
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)
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{
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if ( ! m_children )
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{
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// create map to hold children if it doesn't already exist
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m_children = new CMapStringToVar(IsCaseSensitive(),IsIndexed(),AllowRehashing());
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if (!m_children)
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return;
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}
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m_children->SetAt(key,newValue);
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}
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void
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CVarData::SetIndexed(
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BOOL nVal
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)
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{
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if ( m_children )
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{
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m_children->SetIndexed(nVal);
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}
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if ( nVal )
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{
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m_options |= CVARDATA_INDEXED;
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}
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else
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{
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m_options &= ~CVARDATA_INDEXED;
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}
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}
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void
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CVarData::SetCaseSensitive(
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BOOL nVal // in - whether to make lookups case-sensitive
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)
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{
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if ( m_children )
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{
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m_children->SetCaseSensitive(nVal);
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}
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if ( nVal )
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{
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m_options |= CVARDATA_CASE_SENSITIVE;
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}
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else
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{
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m_options &= ~CVARDATA_CASE_SENSITIVE;
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}
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}
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void
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CVarData::SetAllowRehashing(
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BOOL nVal // in - whether to allow the table to be rehashed for better performance
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)
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{
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if ( m_children )
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{
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m_children->SetAllowRehash(nVal);
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}
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if ( nVal )
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{
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m_options |= CVARDATA_ALLOWREHASH;
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}
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else
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{
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m_options &= ~CVARDATA_ALLOWREHASH;
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}
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}
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HRESULT
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CVarData::WriteToStream(
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LPSTREAM pS // in - stream to write data to
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)
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{
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HRESULT hr = S_OK;
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BOOL hasChildren = (m_children != NULL);
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// save the variant
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hr = m_var.WriteToStream(pS);
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if (SUCCEEDED(hr) )
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{
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// save children, if any
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ULONG result;
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hr = pS->Write(&hasChildren,(sizeof hasChildren),&result);
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if ( SUCCEEDED(hr) )
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{
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if ( m_children )
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{
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hr = m_children->WriteToStream(pS);
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}
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}
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}
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return 0;
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}
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HRESULT
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CVarData::ReadFromStream(
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LPSTREAM pS // in - stream to read data from
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)
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{
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HRESULT hr = S_OK;
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BOOL hasChildren;
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ULONG result;
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// read the variant
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hr = m_var.ReadFromStream(pS);
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if ( SUCCEEDED(hr) )
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{
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hr = pS->Read(&hasChildren,(sizeof hasChildren),&result);
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if ( SUCCEEDED(hr) )
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{
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if ( hasChildren )
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{
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// create the child array
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m_children = new CMapStringToVar(IsCaseSensitive(),IsIndexed(),AllowRehashing());
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if (!m_children)
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return HRESULT_FROM_WIN32(ERROR_NOT_ENOUGH_MEMORY);
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hr = m_children->ReadFromStream(pS);
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}
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}
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}
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return hr;
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}
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DWORD // ret- Length, in bytes to write the data to a stream
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CVarData::CalculateStreamedLength()
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{
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HRESULT hr =S_OK;
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DWORD len = sizeof (VARTYPE);
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// Calculate size needed for root data value
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int cbWrite = 0;
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switch (m_var.vt)
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{
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case VT_UNKNOWN:
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case VT_DISPATCH:
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{
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CComQIPtr<IPersistStream> spStream = m_var.punkVal;
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if( spStream )
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{
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len += sizeof(CLSID);
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ULARGE_INTEGER uiSize = { 0 };
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hr = spStream->GetSizeMax(&uiSize);
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if (FAILED(hr))
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return hr;
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len += uiSize.LowPart;
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}
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}
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break;
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case VT_UI1:
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case VT_I1:
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cbWrite = sizeof(BYTE);
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break;
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case VT_I2:
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case VT_UI2:
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case VT_BOOL:
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cbWrite = sizeof(short);
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break;
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case VT_I4:
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case VT_UI4:
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case VT_R4:
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case VT_INT:
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case VT_UINT:
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case VT_ERROR:
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cbWrite = sizeof(long);
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break;
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case VT_R8:
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case VT_CY:
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case VT_DATE:
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cbWrite = sizeof(double);
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break;
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default:
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break;
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}
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CComBSTR bstrWrite;
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CComVariant varBSTR;
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if (m_var.vt != VT_BSTR)
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{
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hr = VariantChangeType(&varBSTR, &m_var, VARIANT_NOVALUEPROP, VT_BSTR);
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if (FAILED(hr))
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return hr;
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bstrWrite = varBSTR.bstrVal;
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}
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else
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{
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bstrWrite = m_var.bstrVal;
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}
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len += 4 + (static_cast<BSTR>(bstrWrite) ? SysStringByteLen(bstrWrite) : 0) + 2;
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if ( SUCCEEDED(hr) )
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{
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len += cbWrite;
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}
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// Add sizes of children
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len += (sizeof BOOL); // has children?
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if ( m_children )
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{
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len += m_children->CalculateStreamedLength();
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}
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return len;
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}
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long // ret- number of data items
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CVarData::CountItems()
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{
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long count = 1;
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if ( m_children )
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{
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count += m_children->CountItems();
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}
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return count;
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}
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void
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CVarData::McLogInternalDiagnostics(
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CString keyname // in - Key name for this subtree, so the complete name can be displayed
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)
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{
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CString value;
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switch ( m_var.vt )
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{
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case VT_EMPTY:
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value = _T("<Empty>");
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break;
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case VT_NULL:
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value = _T("<Null>");
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break;
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case VT_I2:
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case VT_I4:
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value.Format(_T("%ld"),m_var.iVal);
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break;
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case VT_BSTR:
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value = m_var.bstrVal;
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break;
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default:
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value.Format(_T("variant type=0x%lx"),m_var.vt);
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break;
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}
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MC_LOG(String(keyname) << "-->"<< String(value) << (m_children ? " (Has Children)" : " (No Children)") << " Options = " << makeStr(m_options) << " CaseSensitive=" << ( IsCaseSensitive()?"TRUE":"FALSE") << " Indexed=" << (IsIndexed()?"TRUE":"FALSE") );
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if ( m_children )
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{
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m_children->McLogInternalDiagnostics(keyname);
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}
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} |