You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
186 lines
3.7 KiB
186 lines
3.7 KiB
// Implementation of the CEnumString classs
|
|
|
|
#include "zonepch.h"
|
|
|
|
|
|
// Constructor - destructor.
|
|
|
|
CEnumString::CEnumString() : m_ref()
|
|
{
|
|
pFirst = NULL;
|
|
pLast = NULL;
|
|
pCurrent = NULL;
|
|
}
|
|
|
|
|
|
CEnumString::~CEnumString( )
|
|
{
|
|
// Delete all the strings we created.
|
|
ListStr * pNext = pFirst;
|
|
|
|
while (pNext != NULL)
|
|
{
|
|
ListStr * pDelete = pNext;
|
|
pNext = pNext->pListNext;
|
|
|
|
LocalFree(pDelete->lpsz);
|
|
delete pDelete;
|
|
}
|
|
}
|
|
|
|
HRESULT CEnumString::AddString(LPCWSTR lpsz)
|
|
{
|
|
// First create the element.
|
|
ListStr *pListStr = new ListStr;
|
|
if (pListStr == NULL)
|
|
return E_OUTOFMEMORY;
|
|
|
|
pListStr->lpsz = StrDup(lpsz);
|
|
if (pListStr->lpsz == NULL)
|
|
{
|
|
delete pListStr;
|
|
return E_OUTOFMEMORY;
|
|
}
|
|
|
|
pListStr->pListNext = NULL;
|
|
|
|
if (pFirst == NULL)
|
|
{
|
|
TransAssert(pCurrent == NULL);
|
|
TransAssert(pLast == NULL);
|
|
pFirst = pCurrent = pLast = pListStr;
|
|
}
|
|
else
|
|
{
|
|
TransAssert(pLast != NULL);
|
|
// We don't support adding strings while an enumeration is on.
|
|
TransAssert(pFirst == pCurrent);
|
|
|
|
pLast->pListNext = pListStr;
|
|
pLast = pListStr;
|
|
}
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
// IUnknown methods.
|
|
|
|
STDMETHODIMP_(ULONG) CEnumString::AddRef( )
|
|
{
|
|
LONG lRet = ++m_ref;
|
|
|
|
return lRet;
|
|
}
|
|
|
|
STDMETHODIMP_(ULONG) CEnumString::Release( )
|
|
{
|
|
|
|
LONG lRet = --m_ref;
|
|
|
|
if (m_ref == 0)
|
|
{
|
|
delete this;
|
|
}
|
|
|
|
return lRet;
|
|
}
|
|
|
|
STDMETHODIMP CEnumString::QueryInterface(REFIID riid, LPVOID * ppvObj)
|
|
{
|
|
HRESULT hr = NOERROR;
|
|
|
|
if ( (riid == IID_IUnknown) || (riid == IID_IEnumString))
|
|
{
|
|
*ppvObj = this;
|
|
AddRef();
|
|
}
|
|
else
|
|
{
|
|
*ppvObj = NULL;
|
|
hr = E_NOINTERFACE;
|
|
}
|
|
|
|
return hr;
|
|
}
|
|
|
|
|
|
// IEnumString methods.
|
|
|
|
|
|
STDMETHODIMP
|
|
CEnumString::Next(ULONG celt, LPOLESTR *rgelt, ULONG *pceltFetched)
|
|
{
|
|
HRESULT hr = NOERROR;
|
|
ULONG cFound = 0;
|
|
|
|
// Check the arguments first.
|
|
if (celt == 0)
|
|
return S_OK;
|
|
|
|
if (!rgelt)
|
|
return E_INVALIDARG;
|
|
|
|
do
|
|
{
|
|
if (pCurrent == NULL)
|
|
break;
|
|
|
|
DWORD cChars = lstrlenW(pCurrent->lpsz) + 1;
|
|
rgelt[cFound] = (LPOLESTR)CoTaskMemAlloc(cChars * sizeof(OLECHAR));
|
|
|
|
// If we don't have enough memory don't return anything.
|
|
if (rgelt[cFound] == NULL)
|
|
{
|
|
hr = E_OUTOFMEMORY;
|
|
for (DWORD dwIndex = 0 ; dwIndex < cFound ; dwIndex++ )
|
|
{
|
|
CoTaskMemFree(rgelt[dwIndex]);
|
|
rgelt[dwIndex] = 0;
|
|
}
|
|
}
|
|
|
|
StrCpyW(rgelt[cFound], pCurrent->lpsz);
|
|
|
|
pCurrent = pCurrent->pListNext;
|
|
|
|
cFound++;
|
|
} while ( cFound < celt );
|
|
|
|
if (hr == NOERROR)
|
|
{
|
|
if (pceltFetched)
|
|
*pceltFetched = cFound;
|
|
|
|
hr = (cFound == celt) ? NOERROR : S_FALSE;
|
|
}
|
|
|
|
return hr;
|
|
}
|
|
|
|
|
|
|
|
STDMETHODIMP
|
|
CEnumString::Skip(ULONG celt)
|
|
{
|
|
return E_NOTIMPL;
|
|
}
|
|
|
|
|
|
STDMETHODIMP
|
|
CEnumString::Reset( )
|
|
{
|
|
pCurrent = pFirst;
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
STDMETHODIMP
|
|
CEnumString::Clone(IEnumString **ppEnumString)
|
|
{
|
|
// This should be easy to implement if we do a deep copy.
|
|
// However we should be able to seperate the list from the
|
|
// current pointer and do a much more efficient job.
|
|
// Not impl for code complete.
|
|
|
|
return E_NOTIMPL;
|
|
}
|