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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#if !defined WIN32_LEAN_AND_MEAN
# define WIN32_LEAN_AND_MEAN
#endif
#include <windows.h>
#include <malloc.h>
#include <registry.hxx>
#include <objbase.h>
bool SetRegistryKey(HKEY RootKey, const Filepath_char_t* KeyName, const Filepath_char_t* ValueName, const Filepath_char_t* Value)
{
HKEY hSubKey;
// open or create the desired key
wchar_t dummy[] = L"";
int rc = RegCreateKeyExW(
RootKey, KeyName, 0, dummy, REG_OPTION_NON_VOLATILE, KEY_WRITE, nullptr, &hSubKey, nullptr);
if (ERROR_SUCCESS == rc)
{
rc = RegSetValueExW(
hSubKey, ValueName, 0, REG_SZ, reinterpret_cast<const BYTE*>(Value),
static_cast<DWORD>((wcslen(Value) + 1) * sizeof(*Value)));
RegCloseKey(hSubKey);
}
return (ERROR_SUCCESS == rc);
}
bool DeleteRegistryKey(HKEY RootKey, const Filepath_char_t* KeyName)
{
HKEY hKey;
int rc = RegOpenKeyExW(
RootKey,
KeyName,
0,
KEY_READ | DELETE,
&hKey);
if ( rc == ERROR_FILE_NOT_FOUND )
return true;
if (ERROR_SUCCESS == rc)
{
wchar_t* SubKey;
DWORD nMaxSubKeyLen;
rc = RegQueryInfoKeyW(
hKey, nullptr, nullptr, nullptr, nullptr,
&nMaxSubKeyLen,
nullptr, nullptr, nullptr, nullptr, nullptr, nullptr);
nMaxSubKeyLen++; // space for trailing '\0'
SubKey = static_cast<wchar_t*>(
_alloca(nMaxSubKeyLen*sizeof(wchar_t)));
while (ERROR_SUCCESS == rc)
{
DWORD nLen = nMaxSubKeyLen;
rc = RegEnumKeyExW(
hKey,
0, // always index zero
SubKey,
&nLen,
nullptr, nullptr, nullptr, nullptr);
if (ERROR_NO_MORE_ITEMS == rc)
{
rc = RegDeleteKeyW(RootKey, KeyName);
break;
}
else if (rc == ERROR_SUCCESS)
{
DeleteRegistryKey(hKey, SubKey);
}
} // while
RegCloseKey(hKey);
} // if
return (ERROR_SUCCESS == rc);
}
/** May be used to determine if the specified registry key has subkeys
The function returns true on success else if an error occurs false
*/
bool HasSubkeysRegistryKey(HKEY RootKey, const Filepath_char_t* KeyName, /* out */ bool& bResult)
{
HKEY hKey;
LONG rc = RegOpenKeyExW(RootKey, KeyName, 0, KEY_READ, &hKey);
if (ERROR_SUCCESS == rc)
{
DWORD nSubKeys = 0;
rc = RegQueryInfoKeyW(hKey, nullptr, nullptr, nullptr, &nSubKeys, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr);
RegCloseKey(hKey);
bResult = (nSubKeys > 0);
}
return (ERROR_SUCCESS == rc);
}
// Convert a CLSID to a char string.
Filepath_t ClsidToString(const CLSID& clsid)
{
// Get CLSID
LPOLESTR wszCLSID = nullptr;
StringFromCLSID(clsid, &wszCLSID);
std::wstring sResult = wszCLSID;
// Free memory.
CoTaskMemFree(wszCLSID) ;
return sResult;
}
bool QueryRegistryKey(HKEY RootKey, const Filepath_char_t* KeyName, const Filepath_char_t* ValueName, Filepath_char_t *pszData, DWORD dwBufLen)
{
HKEY hKey;
int rc = RegOpenKeyExW(
RootKey,
KeyName,
0,
KEY_READ,
&hKey);
if (ERROR_SUCCESS == rc)
{
DWORD dwBytes = dwBufLen * sizeof(*pszData);
rc = RegQueryValueExW(
hKey, ValueName, nullptr, nullptr, reinterpret_cast<LPBYTE>(pszData),&dwBytes);
RegCloseKey(hKey);
}
return (ERROR_SUCCESS == rc);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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