windows-nt/Source/XPSP1/NT/multimedia/directx/applicationmanager/appmansetup/registrykey.cpp

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2020-09-26 03:20:57 -05:00
//////////////////////////////////////////////////////////////////////////////////////////////
//
// RegistryKey.cpp
//
// Copyright (C) 2000 Microsoft Corporation. All rights reserved.
//
// Abstract :
//
// This is the implementation of the CRegistryKey class.
//
// History :
//
// 05/05/2000 luish Created
//
//////////////////////////////////////////////////////////////////////////////////////////////
#include <windows.h>
#include "RegistryKey.h"
#include "Global.h"
//////////////////////////////////////////////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////////////////////////////////////////////
CRegistryKey::CRegistryKey(void)
{
m_fKeyOpen = FALSE;
}
//////////////////////////////////////////////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////////////////////////////////////////////
CRegistryKey::~CRegistryKey(void)
{
CloseKey();
}
//////////////////////////////////////////////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////////////////////////////////////////////
STDMETHODIMP CRegistryKey::EnumKeys(const DWORD dwIndex, LPTSTR strKeyName, LPDWORD lpdwKeyNameLen)
{
FILETIME sFileTime;
HRESULT hResult = S_OK;
//
// If there is no currently opened registry key, then GetValue was called unexpectedly
//
if (m_fKeyOpen)
{
if (ERROR_SUCCESS != RegEnumKeyEx(m_hRegistryKey, dwIndex, strKeyName, lpdwKeyNameLen, NULL, NULL, NULL, &sFileTime))
{
hResult = S_FALSE;
}
}
else
{
hResult = E_FAIL;
}
return hResult;
}
//////////////////////////////////////////////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////////////////////////////////////////////
STDMETHODIMP CRegistryKey::CheckForExistingKey(HKEY hKey, LPCTSTR strKeyName)
{
HKEY hRegistryKey;
HRESULT hResult = S_OK;
if (ERROR_SUCCESS != RegOpenKeyEx(hKey, strKeyName, 0, KEY_READ, &hRegistryKey))
{
hResult = S_FALSE;
}
else
{
RegCloseKey(hRegistryKey);
}
return hResult;
}
//////////////////////////////////////////////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////////////////////////////////////////////
STDMETHODIMP CRegistryKey::CreateKey(HKEY hKey, LPCTSTR strKeyName, const DWORD dwOptions, const REGSAM samDesired, LPDWORD lpdwDisposition)
{
HRESULT hResult = S_OK;
SECURITY_ATTRIBUTES sSecurityAttributes = {0};
SECURITY_DESCRIPTOR sSecurityDescriptor = {0};
//
// Make sure that current registry is closed before proceeding
//
CloseKey();
//
// Set the security attributes
//
sSecurityAttributes.nLength = sizeof sSecurityAttributes;
sSecurityAttributes.lpSecurityDescriptor = &sSecurityDescriptor;
InitializeSecurityDescriptor(&sSecurityDescriptor, SECURITY_DESCRIPTOR_REVISION);
SetSecurityDescriptorDacl(&sSecurityDescriptor, TRUE, NULL, FALSE);
//
// Create the new key
//
if (ERROR_SUCCESS != RegCreateKeyEx(hKey, strKeyName, 0, NULL, dwOptions, samDesired, &sSecurityAttributes, &m_hRegistryKey, lpdwDisposition))
{
hResult = E_FAIL;
}
else
{
m_fKeyOpen = TRUE;
}
return hResult;
}
//////////////////////////////////////////////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////////////////////////////////////////////
STDMETHODIMP CRegistryKey::OpenKey(HKEY hKey, LPCTSTR strKeyName, const REGSAM samDesired)
{
HRESULT hResult = S_OK;
//
// Make sure that current registry is closed before proceeding
//
CloseKey();
//
// Open the existing key
//
if (ERROR_SUCCESS != RegOpenKeyEx(hKey, strKeyName, 0, samDesired, &m_hRegistryKey))
{
hResult = E_FAIL;
}
else
{
m_fKeyOpen = TRUE;
}
return hResult;
}
//////////////////////////////////////////////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////////////////////////////////////////////
STDMETHODIMP CRegistryKey::CloseKey(void)
{
HRESULT hResult = E_FAIL;
if (m_fKeyOpen)
{
if (ERROR_SUCCESS == RegCloseKey(m_hRegistryKey))
{
m_fKeyOpen = FALSE;
hResult = S_OK;
}
}
return hResult;
}
//////////////////////////////////////////////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////////////////////////////////////////////
STDMETHODIMP CRegistryKey::DeleteKey(HKEY hKey, LPCTSTR strKeyName)
{
HRESULT hResult = S_OK;
DWORD dwSubKeyNameLen;
HKEY hRegistryKey;
FILETIME sFileTime;
TCHAR strSubKeyName[MAX_PATH];
TCHAR strFullSubKeyName[MAX_PATH];
//
// Recursively delete all subkeys
//
if (ERROR_SUCCESS == RegOpenKeyEx(hKey, strKeyName, 0, KEY_ALL_ACCESS, &hRegistryKey))
{
dwSubKeyNameLen = MAX_PATH;
while ((S_OK == hResult)&&(ERROR_SUCCESS == RegEnumKeyEx(hRegistryKey, 0, strSubKeyName, &dwSubKeyNameLen, NULL, NULL, NULL, &sFileTime)))
{
wsprintf(strFullSubKeyName, TEXT("%s\\%s"), strKeyName, strSubKeyName);
hResult = DeleteKey(hKey, strFullSubKeyName);
dwSubKeyNameLen = MAX_PATH;
}
//
// Close the key
//
RegCloseKey(hRegistryKey);
//
// If all the subkeys were successfully deleted
//
if (S_OK == hResult)
{
//
// Delete this subkey
//
if (ERROR_SUCCESS != RegDeleteKey(hKey, strKeyName))
{
hResult = E_FAIL;
}
}
}
return hResult;
}
//////////////////////////////////////////////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////////////////////////////////////////////
STDMETHODIMP CRegistryKey::EnumValues(const DWORD dwIndex, LPTSTR strValueName, LPDWORD lpdwValueNameLen, LPDWORD lpdwType, LPBYTE lpData, LPDWORD lpdwDataLen)
{
HRESULT hResult = S_OK;
//
// If there is no currently opened registry key, then GetValue was called unexpectedly
//
if (m_fKeyOpen)
{
if (ERROR_SUCCESS != RegEnumValue(m_hRegistryKey, dwIndex, strValueName, lpdwValueNameLen, NULL, lpdwType, lpData, lpdwDataLen))
{
hResult = S_FALSE;
}
}
else
{
hResult = E_FAIL;
}
return hResult;
}
//////////////////////////////////////////////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////////////////////////////////////////////
STDMETHODIMP CRegistryKey::CheckForExistingValue(LPCTSTR strValueName)
{
HRESULT hResult = E_FAIL;
//
// If there is no currently opened registry key, then CheckForExistingValue was
// called unexpectedly
//
if (m_fKeyOpen)
{
//
// Check to see whether we can RegQueryValueEx() on the target. If we can then the value
// exists, othersize it does not
//
if (ERROR_SUCCESS != RegQueryValueEx(m_hRegistryKey, strValueName, NULL, NULL, NULL, NULL))
{
hResult = S_FALSE;
}
else
{
hResult = S_OK;
}
}
return hResult;
}
//////////////////////////////////////////////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////////////////////////////////////////////
STDMETHODIMP CRegistryKey::GetValue(LPCTSTR strValueName, LPDWORD lpdwType, LPBYTE lpData, LPDWORD lpdwDataLen)
{
HRESULT hResult = E_FAIL;
//
// If there is no currently opened registry key, then GetValue was called unexpectedly
//
if (m_fKeyOpen)
{
if (ERROR_SUCCESS == RegQueryValueEx(m_hRegistryKey, strValueName, NULL, lpdwType, lpData, lpdwDataLen))
{
hResult = S_OK;
}
}
return hResult;
}
//////////////////////////////////////////////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////////////////////////////////////////////
STDMETHODIMP CRegistryKey::SetValue(LPCTSTR strValueName, const DWORD dwType, const BYTE * lpData, const DWORD dwDataLen)
{
HRESULT hResult = E_FAIL;
DWORD dwActualDataLen;
//
// If there is no currently opened registry key, then GetValue was called unexpectedly
//
if (m_fKeyOpen)
{
//
// If this value is of type REG_SZ, define the lenght of the string
//
if (REG_SZ == dwType)
{
#ifdef _UNICODE
dwActualDataLen = ((StrLen((LPCTSTR) lpData) + 1) * 2);
#else
dwActualDataLen = (StrLen((LPCTSTR) lpData) + 1);
#endif // _UNICODE
}
else
{
dwActualDataLen = dwDataLen;
}
//
// Set the registry value
//
if (ERROR_SUCCESS == RegSetValueEx(m_hRegistryKey, strValueName, 0, dwType, lpData, dwActualDataLen))
{
hResult = S_OK;
}
}
return hResult;
}
//////////////////////////////////////////////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////////////////////////////////////////////
STDMETHODIMP CRegistryKey::DeleteValue(LPCTSTR strValueName)
{
HRESULT hResult = E_FAIL;
//
// If there is no currently opened registry key, then GetValue was called unexpectedly
//
if (m_fKeyOpen)
{
if (ERROR_SUCCESS == RegDeleteValue(m_hRegistryKey, strValueName))
{
hResult = S_OK;
}
}
return hResult;
}