windows-nt/Source/XPSP1/NT/shell/ext/webcheck/subsmgr2.cpp
2020-09-26 16:20:57 +08:00

940 lines
24 KiB
C++

#include "private.h"
#include "subsmgrp.h"
#include "subitem.h"
// Contains implementations of IEnumSubscription and ISubscriptionMgr2
HRESULT SubscriptionItemFromCookie(BOOL fCreateNew, const SUBSCRIPTIONCOOKIE UNALIGNED *pCookie,
ISubscriptionItem **ppSubscriptionItem);
HRESULT DoGetItemFromURL(LPCTSTR pszURL, ISubscriptionItem **ppSubscriptionItem)
{
HRESULT hr;
SUBSCRIPTIONCOOKIE cookie;
if ((NULL == pszURL) ||
(NULL == ppSubscriptionItem))
{
return E_INVALIDARG;
}
hr = ReadCookieFromInetDB(pszURL, &cookie);
if (SUCCEEDED(hr))
{
hr = SubscriptionItemFromCookie(FALSE, &cookie, ppSubscriptionItem);
}
return hr;
}
HRESULT DoGetItemFromURLW(LPCWSTR pwszURL, ISubscriptionItem **ppSubscriptionItem)
{
TCHAR szURL[INTERNET_MAX_URL_LENGTH];
if ((NULL == pwszURL) ||
(NULL == ppSubscriptionItem))
{
return E_INVALIDARG;
}
#ifdef UNICODE
StrCpyN(szURL, pwszURL, ARRAYSIZE(szURL));
#else
MyOleStrToStrN(szURL, ARRAYSIZE(szURL), pwszURL);
#endif
return DoGetItemFromURL(szURL, ppSubscriptionItem);
}
HRESULT DoAbortItems(
/* [in] */ DWORD dwNumCookies,
/* [size_is][in] */ const SUBSCRIPTIONCOOKIE *pCookies)
{
HRESULT hr;
if ((0 == dwNumCookies) || (NULL == pCookies))
{
return E_INVALIDARG;
}
ISubscriptionThrottler *pst;
hr = CoCreateInstance(CLSID_SubscriptionThrottler, NULL,
CLSCTX_INPROC_SERVER | CLSCTX_LOCAL_SERVER,
IID_ISubscriptionThrottler, (void **)&pst);
if (SUCCEEDED(hr))
{
hr = pst->AbortItems(dwNumCookies, pCookies);
pst->Release();
}
else
{
hr = S_FALSE;
}
return hr;
}
HRESULT DoCreateSubscriptionItem(
/* [in] */ const SUBSCRIPTIONITEMINFO *pSubscriptionItemInfo,
/* [out] */ SUBSCRIPTIONCOOKIE *pNewCookie,
/* [out] */ ISubscriptionItem **ppSubscriptionItem)
{
HRESULT hr;
ISubscriptionItem *psi;
if ((NULL == pSubscriptionItemInfo) ||
(NULL == pNewCookie) ||
(NULL == ppSubscriptionItem))
{
return E_INVALIDARG;
}
*ppSubscriptionItem = NULL;
CreateCookie(pNewCookie);
hr = SubscriptionItemFromCookie(TRUE, pNewCookie, &psi);
if (SUCCEEDED(hr))
{
ASSERT(NULL != psi);
hr = psi->SetSubscriptionItemInfo(pSubscriptionItemInfo);
if (SUCCEEDED(hr))
{
*ppSubscriptionItem = psi;
}
else
{
// Don't leak or leave slop hanging around
psi->Release();
DoDeleteSubscriptionItem(pNewCookie, FALSE);
}
}
return hr;
}
HRESULT DoCloneSubscriptionItem(
/* [in] */ ISubscriptionItem *pSubscriptionItem,
/* [out] */ SUBSCRIPTIONCOOKIE *pNewCookie,
/* [out] */ ISubscriptionItem **ppSubscriptionItem)
{
HRESULT hr;
SUBSCRIPTIONCOOKIE NewCookie;
if ((NULL == pSubscriptionItem) ||
(NULL == ppSubscriptionItem))
{
return E_INVALIDARG;
}
IEnumItemProperties *peip;
SUBSCRIPTIONITEMINFO sii;
*ppSubscriptionItem = NULL;
// First get existing subscription details
sii.cbSize = sizeof(SUBSCRIPTIONITEMINFO);
hr = pSubscriptionItem->GetSubscriptionItemInfo(&sii);
if (SUCCEEDED(hr))
{
ISubscriptionItem *psi;
// Mark as temp and create a new subscription item
sii.dwFlags |= SI_TEMPORARY;
hr = DoCreateSubscriptionItem(&sii, &NewCookie, &psi);
if (SUCCEEDED(hr))
{
if (pNewCookie)
*pNewCookie = NewCookie;
// Get properties from existing item
hr = pSubscriptionItem->EnumProperties(&peip);
if (SUCCEEDED(hr))
{
ULONG count;
ASSERT(NULL != peip);
hr = peip->GetCount(&count);
if (SUCCEEDED(hr))
{
ITEMPROP *pProps = new ITEMPROP[count];
LPWSTR *pNames = new LPWSTR[count];
VARIANT *pVars = new VARIANT[count];
if ((NULL != pProps) && (NULL != pNames) && (NULL != pVars))
{
hr = peip->Next(count, pProps, &count);
if (SUCCEEDED(hr))
{
ULONG i;
for (i = 0; i < count; i++)
{
pNames[i] = pProps[i].pwszName;
pVars[i] = pProps[i].variantValue;
}
hr = psi->WriteProperties(count, pNames, pVars);
// clean up from enum
for (i = 0; i < count; i++)
{
if (pProps[i].pwszName)
{
CoTaskMemFree(pProps[i].pwszName);
}
VariantClear(&pProps[i].variantValue);
}
}
}
else
{
hr = E_OUTOFMEMORY;
}
SAFEDELETE(pProps);
SAFEDELETE(pNames);
SAFEDELETE(pVars);
}
peip->Release();
}
if (SUCCEEDED(hr))
{
*ppSubscriptionItem = psi;
}
else
{
psi->Release();
}
}
}
return hr;
}
HRESULT DoDeleteSubscriptionItem(
/* [in] */ const SUBSCRIPTIONCOOKIE UNALIGNED *pCookie_ua,
/* [in] */ BOOL fAbortItem)
{
HRESULT hr;
TCHAR szKey[MAX_PATH];
SUBSCRIPTIONCOOKIE cookie_buf;
SUBSCRIPTIONCOOKIE *pCookie;
//
// Make an aligned copy of pCookie_ua and set a pointer to it.
//
if (pCookie_ua != NULL) {
cookie_buf = *pCookie_ua;
pCookie = &cookie_buf;
} else {
pCookie = NULL;
}
if (NULL == pCookie)
{
return E_INVALIDARG;
}
if (fAbortItem)
{
DoAbortItems(1, pCookie);
}
if (ItemKeyNameFromCookie(pCookie, szKey, ARRAYSIZE(szKey)))
{
// Notify the agent that it is about to get deleted.
ISubscriptionItem *pItem=NULL;
if (SUCCEEDED(SubscriptionItemFromCookie(FALSE, pCookie, &pItem)))
{
SUBSCRIPTIONITEMINFO sii = { sizeof(SUBSCRIPTIONITEMINFO) };
if (SUCCEEDED(pItem->GetSubscriptionItemInfo(&sii)))
{
ASSERT(!(sii.dwFlags & SI_TEMPORARY));
ISubscriptionAgentControl *psac=NULL;
if (SUCCEEDED(
CoCreateInstance(sii.clsidAgent,
NULL,
CLSCTX_INPROC_SERVER,
IID_ISubscriptionAgentControl,
(void**)&psac)))
{
psac->SubscriptionControl(pItem, SUBSCRIPTION_AGENT_DELETE);
psac->Release();
}
FireSubscriptionEvent(SUBSNOTF_DELETE, pCookie);
if (GUID_NULL != sii.ScheduleGroup)
{
ISyncScheduleMgr *pSyncScheduleMgr;
hr = CoCreateInstance(CLSID_SyncMgr, NULL, CLSCTX_ALL,
IID_ISyncScheduleMgr, (void **)&pSyncScheduleMgr);
if (SUCCEEDED(hr))
{
pSyncScheduleMgr->RemoveSchedule(&sii.ScheduleGroup);
pSyncScheduleMgr->Release();
}
}
}
pItem->Release();
}
hr = (SHDeleteKey(HKEY_CURRENT_USER, szKey) == ERROR_SUCCESS) ? S_OK : E_FAIL;
}
else
{
TraceMsg(TF_ALWAYS, "Failed to delete subscription item.");
hr = E_FAIL;
}
return hr;
}
HRESULT AddUpdateSubscription(SUBSCRIPTIONCOOKIE UNALIGNED *pCookie_ua,
SUBSCRIPTIONITEMINFO *psii,
LPCWSTR pwszURL,
ULONG nProps,
const LPWSTR rgwszName[],
VARIANT rgValue[])
{
HRESULT hr = S_OK;
SUBSCRIPTIONCOOKIE cookie_buf;
SUBSCRIPTIONCOOKIE *pCookie;
//
// Make an aligned copy of pCookie_ua and set a pointer to it.
//
cookie_buf = *pCookie_ua;
pCookie = &cookie_buf;
ASSERT((0 == nProps) || ((NULL != rgwszName) && (NULL != rgValue)));
TCHAR szURL[INTERNET_MAX_URL_LENGTH];
ISubscriptionItem *psi = NULL;
SUBSCRIPTIONCOOKIE cookie;
#ifdef UNICODE
StrCpyNW(szURL, pwszURL, ARRAYSIZE(szURL));
#else
MyOleStrToStrN(szURL, ARRAYSIZE(szURL), pwszURL);
#endif
// Try and get the cookie from the inet db otherwise
// create a new one.
if (*pCookie == CLSID_NULL)
{
CreateCookie(&cookie);
}
else
{
cookie = *pCookie;
}
// Update the inet db
WriteCookieToInetDB(szURL, &cookie, FALSE);
hr = SubscriptionItemFromCookie(TRUE, &cookie, &psi);
if (SUCCEEDED(hr))
{
hr = psi->SetSubscriptionItemInfo(psii);
if (SUCCEEDED(hr) && (nProps > 0))
{
ASSERT(NULL != psi);
hr = psi->WriteProperties(nProps, rgwszName, rgValue);
}
psi->Release();
if (FAILED(hr))
{
DoDeleteSubscriptionItem(&cookie, TRUE);
}
}
*pCookie_ua = cookie_buf;
return hr;
}
HRESULT SubscriptionItemFromCookie(BOOL fCreateNew, const SUBSCRIPTIONCOOKIE UNALIGNED *pCookie_ua,
ISubscriptionItem **ppSubscriptionItem)
{
HRESULT hr;
SUBSCRIPTIONCOOKIE cookie_buf;
SUBSCRIPTIONCOOKIE *pCookie;
//
// Make an aligned copy of pCookie_ua and set a pointer to it.
//
if (pCookie_ua != NULL) {
cookie_buf = *pCookie_ua;
pCookie = &cookie_buf;
} else {
pCookie = NULL;
}
ASSERT((NULL != pCookie) && (NULL != ppSubscriptionItem));
HKEY hkey;
if (OpenItemKey(pCookie, fCreateNew ? TRUE : FALSE, KEY_READ | KEY_WRITE, &hkey))
{
*ppSubscriptionItem = new CSubscriptionItem(pCookie, hkey);
if (NULL != *ppSubscriptionItem)
{
hr = S_OK;
}
else
{
hr = E_OUTOFMEMORY;
}
RegCloseKey(hkey);
}
else
{
*ppSubscriptionItem = NULL;
hr = E_FAIL;
}
return hr;
}
BOOL ItemKeyNameFromCookie(const SUBSCRIPTIONCOOKIE *pCookie,
TCHAR *pszKeyName, DWORD cchKeyName)
{
WCHAR wszGuid[GUIDSTR_MAX];
ASSERT((NULL != pCookie) &&
(NULL != pszKeyName) &&
(cchKeyName >= ARRAYSIZE(WEBCHECK_REGKEY_STORE) + GUIDSTR_MAX));
if (StringFromGUID2(*pCookie, wszGuid, ARRAYSIZE(wszGuid)))
{
#ifdef UNICODE
wnsprintfW(pszKeyName, cchKeyName, L"%s\\%s", c_szRegKeyStore, wszGuid);
#else
wnsprintfA(pszKeyName, cchKeyName, "%s\\%S", c_szRegKeyStore, wszGuid);
#endif
return TRUE;
}
return FALSE;
}
BOOL OpenItemKey(const SUBSCRIPTIONCOOKIE *pCookie, BOOL fCreateNew, REGSAM samDesired, HKEY *phkey)
{
TCHAR szKeyName[MAX_PATH];
ASSERT((NULL != pCookie) && (NULL != phkey));
if (ItemKeyNameFromCookie(pCookie, szKeyName, ARRAYSIZE(szKeyName)))
{
if (fCreateNew)
{
DWORD dwDisposition;
return RegCreateKeyEx(HKEY_CURRENT_USER, szKeyName, 0, NULL, REG_OPTION_NON_VOLATILE,
samDesired, NULL, phkey, &dwDisposition) == ERROR_SUCCESS;
}
else
{
return RegOpenKeyEx(HKEY_CURRENT_USER, szKeyName, 0, samDesired, phkey) == ERROR_SUCCESS;
}
}
return FALSE;
}
// ISubscriptionMgr2 members
STDMETHODIMP CSubscriptionMgr::GetItemFromURL(
/* [in] */ LPCWSTR pwszURL,
/* [out] */ ISubscriptionItem **ppSubscriptionItem)
{
return DoGetItemFromURLW(pwszURL, ppSubscriptionItem);
}
STDMETHODIMP CSubscriptionMgr::GetItemFromCookie(
/* [in] */ const SUBSCRIPTIONCOOKIE *pSubscriptionCookie,
/* [out] */ ISubscriptionItem **ppSubscriptionItem)
{
if ((NULL == pSubscriptionCookie) ||
(NULL == ppSubscriptionItem))
{
return E_INVALIDARG;
}
return SubscriptionItemFromCookie(FALSE, pSubscriptionCookie, ppSubscriptionItem);
}
STDMETHODIMP CSubscriptionMgr::GetSubscriptionRunState(
/* [in] */ DWORD dwNumCookies,
/* [in] */ const SUBSCRIPTIONCOOKIE *pSubscriptionCookies,
/* [out] */ DWORD *pdwRunState)
{
HRESULT hr;
if ((0 == dwNumCookies) ||
(NULL == pSubscriptionCookies) ||
(NULL == pdwRunState))
{
return E_INVALIDARG;
}
ISubscriptionThrottler *pst;
hr = CoCreateInstance(CLSID_SubscriptionThrottler, NULL,
CLSCTX_INPROC_SERVER | CLSCTX_LOCAL_SERVER,
IID_ISubscriptionThrottler, (void **)&pst);
if (SUCCEEDED(hr))
{
hr = pst->GetSubscriptionRunState(dwNumCookies, pSubscriptionCookies, pdwRunState);
pst->Release();
}
else
{
// Couldn't connect to a running throttler so assume nothing
// is running.
for (DWORD i = 0; i < dwNumCookies; i++)
{
*pdwRunState++ = 0;
}
hr = S_FALSE;
}
return hr;
}
STDMETHODIMP CSubscriptionMgr::EnumSubscriptions(
/* [in] */ DWORD dwFlags,
/* [out] */ IEnumSubscription **ppEnumSubscriptions)
{
HRESULT hr;
if ((dwFlags & ~SUBSMGRENUM_MASK) || (NULL == ppEnumSubscriptions))
{
return E_INVALIDARG;
}
CEnumSubscription *pes = new CEnumSubscription;
*ppEnumSubscriptions = NULL;
if (NULL != pes)
{
hr = pes->Initialize(dwFlags);
if (SUCCEEDED(hr))
{
hr = pes->QueryInterface(IID_IEnumSubscription, (void **)ppEnumSubscriptions);
}
pes->Release();
}
else
{
hr = E_OUTOFMEMORY;
}
return hr;
}
STDMETHODIMP CSubscriptionMgr::UpdateItems(
/* [in] */ DWORD dwFlags,
/* [in] */ DWORD dwNumCookies,
/* [size_is][in] */ const SUBSCRIPTIONCOOKIE *pCookies)
{
HRESULT hr;
if ((dwFlags & ~SUBSMGRUPDATE_MASK) || (0 == dwNumCookies) || (NULL == pCookies))
{
return E_INVALIDARG;
}
//
// Fail if restrictions are in place.
// FEATURE: Should we have a flag parameter to override this?
//
if (SHRestricted2W(REST_NoManualUpdates, NULL, 0))
{
SGMessageBox(NULL, IDS_RESTRICTED, MB_OK);
return E_ACCESSDENIED;
}
ISyncMgrSynchronizeInvoke *pSyncMgrInvoke;
hr = CoCreateInstance(CLSID_SyncMgr,
NULL,
CLSCTX_ALL,
IID_ISyncMgrSynchronizeInvoke,
(void **)&pSyncMgrInvoke);
if (SUCCEEDED(hr))
{
DWORD dwInvokeFlags = SYNCMGRINVOKE_STARTSYNC;
if (dwFlags & SUBSMGRUPDATE_MINIMIZE)
{
dwInvokeFlags |= SYNCMGRINVOKE_MINIMIZED;
}
hr = pSyncMgrInvoke->UpdateItems(dwInvokeFlags, CLSID_WebCheckOfflineSync,
dwNumCookies * sizeof(SUBSCRIPTIONCOOKIE),
(const BYTE *)pCookies);
pSyncMgrInvoke->Release();
}
return hr;
}
STDMETHODIMP CSubscriptionMgr::AbortItems(
/* [in] */ DWORD dwNumCookies,
/* [size_is][in] */ const SUBSCRIPTIONCOOKIE *pCookies)
{
return DoAbortItems(dwNumCookies, pCookies);
}
STDMETHODIMP CSubscriptionMgr::AbortAll()
{
HRESULT hr;
ISubscriptionThrottler *pst;
hr = CoCreateInstance(CLSID_SubscriptionThrottler, NULL,
CLSCTX_INPROC_SERVER | CLSCTX_LOCAL_SERVER,
IID_ISubscriptionThrottler, (void **)&pst);
if (SUCCEEDED(hr))
{
hr = pst->AbortAll();
pst->Release();
}
else
{
hr = S_FALSE;
}
return hr;
}
// ISubscriptionMgrPriv
STDMETHODIMP CSubscriptionMgr::CreateSubscriptionItem(
/* [in] */ const SUBSCRIPTIONITEMINFO *pSubscriptionItemInfo,
/* [out] */ SUBSCRIPTIONCOOKIE *pNewCookie,
/* [out] */ ISubscriptionItem **ppSubscriptionItem)
{
return DoCreateSubscriptionItem(pSubscriptionItemInfo, pNewCookie, ppSubscriptionItem);
}
STDMETHODIMP CSubscriptionMgr::CloneSubscriptionItem(
/* [in] */ ISubscriptionItem *pSubscriptionItem,
/* [out] */ SUBSCRIPTIONCOOKIE *pNewCookie,
/* [out] */ ISubscriptionItem **ppSubscriptionItem)
{
return DoCloneSubscriptionItem(pSubscriptionItem, pNewCookie, ppSubscriptionItem);
}
STDMETHODIMP CSubscriptionMgr::DeleteSubscriptionItem(
/* [in] */ const SUBSCRIPTIONCOOKIE *pCookie)
{
return DoDeleteSubscriptionItem(pCookie, TRUE);
}
// ** CEnumSubscription **
CEnumSubscription::CEnumSubscription()
{
ASSERT(NULL == m_pCookies);
ASSERT(0 == m_nCurrent);
ASSERT(0 == m_nCount);
m_cRef = 1;
DllAddRef();
}
CEnumSubscription::~CEnumSubscription()
{
if (NULL != m_pCookies)
{
delete [] m_pCookies;
}
DllRelease();
}
HRESULT CEnumSubscription::Initialize(DWORD dwFlags)
{
HRESULT hr = E_FAIL;
HKEY hkey = NULL;
DWORD dwDisposition;
ASSERT(0 == m_nCount);
if (RegCreateKeyEx(HKEY_CURRENT_USER, c_szRegKeyStore, 0, NULL, REG_OPTION_NON_VOLATILE,
KEY_READ | KEY_WRITE, NULL, &hkey, &dwDisposition) == ERROR_SUCCESS)
{
DWORD nCount;
if (RegQueryInfoKey(hkey,
NULL, // address of buffer for class string
NULL, // address of size of class string buffer
NULL, // reserved
&nCount, // address of buffer for number of subkeys
NULL, // address of buffer for longest subkey name length
NULL, // address of buffer for longest class string length
NULL, // address of buffer for number of value entries
NULL, // address of buffer for longest value name length
NULL, // address of buffer for longest value data length
NULL, // address of buffer for security descriptor length
NULL // address of buffer for last write time
) == ERROR_SUCCESS)
{
SUBSCRIPTIONCOOKIE Cookie;
m_pCookies = new SUBSCRIPTIONCOOKIE[nCount];
if (NULL != m_pCookies)
{
TCHAR szKeyName[GUIDSTR_MAX];
hr = S_OK;
for (ULONG i = 0; (i < nCount) && (S_OK == hr); i++)
{
if (RegEnumKey(hkey, i, szKeyName, ARRAYSIZE(szKeyName)) ==
ERROR_SUCCESS)
{
HRESULT hrConvert;
#ifdef UNICODE
hrConvert = CLSIDFromString(szKeyName, &Cookie);
#else
WCHAR wszKeyName[GUIDSTR_MAX];
MultiByteToWideChar(CP_ACP, 0, szKeyName, -1,
wszKeyName, ARRAYSIZE(wszKeyName));
hrConvert = CLSIDFromString(wszKeyName, &Cookie);
#endif
if (SUCCEEDED(hrConvert))
{
ISubscriptionItem *psi;
m_pCookies[m_nCount] = Cookie;
hr = SubscriptionItemFromCookie(FALSE, &Cookie, &psi);
if (SUCCEEDED(hr))
{
SUBSCRIPTIONITEMINFO sii;
sii.cbSize = sizeof(SUBSCRIPTIONITEMINFO);
if (SUCCEEDED(psi->GetSubscriptionItemInfo(&sii)))
{
// Only count this if it's not a temporary
// or the caller asked for temporary items.
if ((!(sii.dwFlags & SI_TEMPORARY)) ||
(dwFlags & SUBSMGRENUM_TEMP))
{
m_nCount++;
}
}
psi->Release();
}
}
}
}
}
else
{
hr = E_OUTOFMEMORY;
}
}
RegCloseKey(hkey);
}
return hr;
}
// IUnknown members
STDMETHODIMP CEnumSubscription::QueryInterface(REFIID riid, void **ppv)
{
HRESULT hr;
if (NULL == ppv)
{
return E_INVALIDARG;
}
if ((IID_IUnknown == riid) || (IID_IEnumSubscription == riid))
{
*ppv = (IEnumSubscription *)this;
AddRef();
hr = S_OK;
}
else
{
*ppv = NULL;
hr = E_NOINTERFACE;
}
return hr;
}
STDMETHODIMP_(ULONG) CEnumSubscription::AddRef()
{
return ++m_cRef;
}
STDMETHODIMP_(ULONG) CEnumSubscription::Release()
{
if (--m_cRef == 0)
{
delete this;
return 0;
}
return m_cRef;
}
HRESULT CEnumSubscription::CopyRange(ULONG nStart, ULONG nCount,
SUBSCRIPTIONCOOKIE *pCookies, ULONG *pnCopied)
{
ULONG nCopied = 0;
ASSERT((NULL != pCookies) && (NULL != pnCopied));
if (m_nCurrent < m_nCount)
{
ULONG nRemaining = m_nCount - m_nCurrent;
nCopied = min(nRemaining, nCount);
memcpy(pCookies, m_pCookies + m_nCurrent, nCopied * sizeof(SUBSCRIPTIONCOOKIE));
}
*pnCopied = nCopied;
return (nCopied == nCount) ? S_OK : S_FALSE;
}
// IEnumSubscription
STDMETHODIMP CEnumSubscription::Next(
/* [in] */ ULONG celt,
/* [length_is][size_is][out] */ SUBSCRIPTIONCOOKIE *rgelt,
/* [out] */ ULONG *pceltFetched)
{
HRESULT hr;
if ((0 == celt) ||
((celt > 1) && (NULL == pceltFetched)) ||
(NULL == rgelt))
{
return E_INVALIDARG;
}
DWORD nFetched;
hr = CopyRange(m_nCurrent, celt, rgelt, &nFetched);
m_nCurrent += nFetched;
if (pceltFetched)
{
*pceltFetched = nFetched;
}
return hr;
}
STDMETHODIMP CEnumSubscription::Skip(
/* [in] */ ULONG celt)
{
HRESULT hr;
m_nCurrent += celt;
if (m_nCurrent > (m_nCount - 1))
{
m_nCurrent = m_nCount; // Passed the last one
hr = S_FALSE;
}
else
{
hr = S_OK;
}
return hr;
}
STDMETHODIMP CEnumSubscription::Reset()
{
m_nCurrent = 0;
return S_OK;
}
STDMETHODIMP CEnumSubscription::Clone(
/* [out] */ IEnumSubscription **ppenum)
{
HRESULT hr = E_OUTOFMEMORY;
*ppenum = NULL;
CEnumSubscription *pes = new CEnumSubscription;
if (NULL != pes)
{
pes->m_pCookies = new SUBSCRIPTIONCOOKIE[m_nCount];
if (NULL != pes->m_pCookies)
{
ULONG nFetched;
hr = E_FAIL;
pes->m_nCount = m_nCount;
CopyRange(0, m_nCount, pes->m_pCookies, &nFetched);
ASSERT(m_nCount == nFetched);
if (m_nCount == nFetched)
{
hr = pes->QueryInterface(IID_IEnumSubscription, (void **)ppenum);
}
}
pes->Release();
}
return hr;
}
STDMETHODIMP CEnumSubscription::GetCount(
/* [out] */ ULONG *pnCount)
{
if (NULL == pnCount)
{
return E_INVALIDARG;
}
*pnCount = m_nCount;
return S_OK;
}