539 lines
12 KiB
C++
539 lines
12 KiB
C++
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//+--------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1994 - 1998.
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//
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// File: safereg.cxx
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//
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// Contents: Implementation of Win32 registry API C++ wrapper
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//
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// Classes: CSafeReg
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//
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// History: 1-02-1997 DavidMun Created
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//
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//---------------------------------------------------------------------------
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#include "precomp.hxx"
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#include "safereg.hxx"
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//+--------------------------------------------------------------------------
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//
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// Member: CSafeReg::Close
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//
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// Synopsis: Close the key if it is open.
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//
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// History: 3-31-1997 DavidMun Created
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//
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//---------------------------------------------------------------------------
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VOID
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CSafeReg::Close()
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{
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// TRACE_METHOD(CSafeReg, Close);
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if (_hKey)
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{
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LONG lr = RegCloseKey(_hKey);
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ASSERT(lr == ERROR_SUCCESS);
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_hKey = NULL;
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}
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}
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//+--------------------------------------------------------------------------
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//
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// Member: CSafeReg::Create
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//
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// Synopsis: Creates a new key with write access.
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//
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// Arguments: [wszSubKey] - name of new key
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// [pshkNew] - given new key; must not already have a key
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//
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// Returns: HRESULT
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//
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// Modifies: *[pshkNew]
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//
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// History: 3-31-1997 DavidMun Created
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//
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//---------------------------------------------------------------------------
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HRESULT
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CSafeReg::Create(
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LPCWSTR wszSubKey,
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CSafeReg *pshkNew)
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{
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ASSERT(_hKey);
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ASSERT(!pshkNew->_hKey);
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HRESULT hr = S_OK;
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LONG lr;
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DWORD dwDisposition;
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lr = RegCreateKeyEx(_hKey,
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wszSubKey,
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0,
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NULL,
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REG_OPTION_NON_VOLATILE,
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KEY_WRITE,
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NULL,
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&pshkNew->_hKey,
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&dwDisposition);
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if (lr != ERROR_SUCCESS)
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{
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hr = HRESULT_FROM_WIN32(lr);
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}
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return hr;
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}
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//+--------------------------------------------------------------------------
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//
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// Member: CSafeReg::Connect
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//
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// Synopsis: Open a connection to HKLM or HKEY_USERS on
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// [ptszMachineName].
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//
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// Arguments: [ptszMachineName] - remote machine name.
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// [hkeyPredefined] - HKEY_LOCAL_MACHINE or HKEY_USERS.
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//
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// Returns: HRESULT
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//
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// History: 2-07-1997 DavidMun Created
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//
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//---------------------------------------------------------------------------
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HRESULT
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CSafeReg::Connect(
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LPCWSTR pwszMachineName,
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HKEY hkeyPredefined)
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{
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ASSERT(!_hKey);
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ASSERT(pwszMachineName);
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ASSERT(hkeyPredefined == HKEY_LOCAL_MACHINE ||
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hkeyPredefined == HKEY_USERS);
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HRESULT hr = S_OK;
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LONG lr;
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lr = RegConnectRegistry((LPWSTR)pwszMachineName,
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hkeyPredefined,
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&_hKey);
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if (lr != ERROR_SUCCESS)
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{
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hr = HRESULT_FROM_WIN32(lr);
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}
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return hr;
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}
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//+--------------------------------------------------------------------------
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//
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// Member: CSafeReg::Enum
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//
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// Synopsis: Wraps the RegEnumKeyEx API.
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//
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// Arguments: [ulSubKey] - 0-based subkey index
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// [pwszSubkeyName] - buffer to hold subkey
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// [cchSubkeyName] - size of buffer
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//
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// Returns: S_OK - success
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// S_FALSE - no more items
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// E_* - enum api failed
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//
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// Modifies: *[pwszSubkeyName]
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//
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// History: 2-10-1997 DavidMun Created
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//
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//---------------------------------------------------------------------------
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HRESULT
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CSafeReg::Enum(
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ULONG ulSubKey,
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LPWSTR pwszSubkeyName,
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ULONG cchSubkeyName)
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{
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ASSERT(_hKey);
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HRESULT hr = S_OK;
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LONG lr;
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FILETIME ftLastWrite;
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lr = RegEnumKeyEx(_hKey,
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ulSubKey,
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pwszSubkeyName,
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&cchSubkeyName,
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NULL,
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NULL,
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NULL,
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&ftLastWrite);
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if (lr != ERROR_SUCCESS)
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{
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if (lr == ERROR_NO_MORE_ITEMS)
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{
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hr = S_FALSE;
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}
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else
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{
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hr = HRESULT_FROM_WIN32(lr);
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}
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}
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return hr;
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}
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//+--------------------------------------------------------------------------
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//
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// Member: CSafeReg::Open
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//
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// Synopsis: Wraps the RegOpenKeyEx function.
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//
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// Arguments: [hKeyParent] - open parent key
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// [lpszKeyName] - name of key to open
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// [samDesired] - desired access level
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//
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// Returns: HRESULT representing result of RegOpenKeyEx.
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//
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// History: 1-13-1997 DavidMun Created
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//
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//---------------------------------------------------------------------------
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HRESULT
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CSafeReg::Open(
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HKEY hKeyParent,
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LPCTSTR lpszKeyName,
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REGSAM samDesired)
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{
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// TRACE_METHOD(CSafeReg, Open);
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ASSERT(hKeyParent);
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ASSERT(!_hKey);
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HRESULT hr = S_OK;
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HKEY hKey = NULL;
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LONG lr = RegOpenKeyEx(hKeyParent, lpszKeyName, 0, samDesired, &hKey);
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if (lr == ERROR_SUCCESS)
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{
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_hKey = hKey;
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}
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else
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{
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hr = HRESULT_FROM_WIN32(lr);
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}
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return hr;
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}
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//+--------------------------------------------------------------------------
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//
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// Member: CSafeReg::QueryBufSize
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//
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// Synopsis: Fill *[pcb] with the number bytes required to hold the
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// value specified by [wszValueName].
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//
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// Arguments: [wszValueName] - name of registry value on this key
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// [pcb] - filled with required buffer size, in bytes
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//
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// Returns: HRESULT
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//
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// Modifies: *[pcb]
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//
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// History: 2-24-1997 DavidMun Created
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//
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//---------------------------------------------------------------------------
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HRESULT
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CSafeReg::QueryBufSize(
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LPWSTR wszValueName,
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ULONG *pcb)
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{
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HRESULT hr = S_OK;
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LONG lr;
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ULONG ulType;
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lr = RegQueryValueEx(_hKey, wszValueName, NULL, NULL, NULL, pcb);
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if (lr != ERROR_SUCCESS)
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{
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hr = E_FAIL;
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}
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return hr;
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}
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//+--------------------------------------------------------------------------
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//
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// Member: CSafeReg::QueryDword
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//
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// Synopsis: Fill *[pdw] with the reg dword for value [wszValueName] on
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// this key.
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//
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// Arguments: [wszValueName] - name of dword value
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// [pdw] - filled with dword
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//
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// Returns: HRESULT from Registry call.
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//
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// Modifies: *[pdw]
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//
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// History: 1-15-1997 DavidMun Created
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//
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//---------------------------------------------------------------------------
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HRESULT
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CSafeReg::QueryDword(
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LPWSTR wszValueName,
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LPDWORD pdw)
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{
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// TRACE_METHOD(CSafeReg, QueryDword);
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ASSERT(_hKey);
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HRESULT hr = S_OK;
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ULONG cbData = sizeof(*pdw);
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ULONG ulType;
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LONG lr = RegQueryValueEx(_hKey,
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wszValueName,
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NULL,
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&ulType,
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(LPBYTE) pdw,
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&cbData);
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if (lr != ERROR_SUCCESS)
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{
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hr = E_FAIL;
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}
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else
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{
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ASSERT(REG_DWORD == ulType);
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}
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return hr;
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}
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//+--------------------------------------------------------------------------
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//
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// Member: CSafeReg::QueryPath
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//
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// Synopsis: Query this key for a value named [pwszValueName], which is
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// expected to be of type REG_SZ or REG_EXPAND_SZ, and put
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// the result in [pwszPathBuf].
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//
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// Arguments: [pwszValueName] - value to query for
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// [pwszPathBuf] - buffer for string
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// [cchPathBuf] - size, in wchars, of [pwszPathBuf]
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// [fExpand] - TRUE=>expand a REG_EXPAND_SZ string,
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// FALSE=>just copy it
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//
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// Returns: S_OK - [pwszPathBuf] valid
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// E_* - [pwszPathBuf] is an empty string
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//
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// Modifies: *[pwszPathBuf]
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//
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// History: 2-10-1997 DavidMun Created
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//
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// Notes: Strings are expanded using environment variables for the
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// current process, i.e., on the local machine, even if this
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// contains a key to a remote machine's registry.
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//
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//---------------------------------------------------------------------------
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HRESULT
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CSafeReg::QueryPath(
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LPWSTR pwszValueName,
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LPWSTR pwszPathBuf,
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ULONG cchPathBuf,
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BOOL fExpand)
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{
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// TRACE_METHOD(CSafeReg, QueryPath);
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ASSERT(_hKey);
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HRESULT hr = S_OK;
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DWORD dwType;
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*pwszPathBuf = L'\0'; // init for failure case
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LONG lr;
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ULONG cbPath = cchPathBuf * sizeof(WCHAR);
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lr = RegQueryValueEx(_hKey,
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pwszValueName,
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NULL,
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&dwType,
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(LPBYTE) pwszPathBuf,
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&cbPath);
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if (lr == ERROR_SUCCESS && dwType == REG_EXPAND_SZ)
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{
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if (fExpand)
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{
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LPWSTR pwszExpandedPath = new WCHAR[cchPathBuf];
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if (pwszExpandedPath)
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{
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lr = ExpandEnvironmentStrings(pwszPathBuf,
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pwszExpandedPath,
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cchPathBuf);
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if (!lr || (ULONG) lr > cchPathBuf)
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{
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if (!lr)
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{
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hr = HRESULT_FROM_WIN32(GetLastError());
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}
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else
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{
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hr = E_FAIL;
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}
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}
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else
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{
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lstrcpy(pwszPathBuf, pwszExpandedPath);
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}
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delete [] pwszExpandedPath;
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}
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else
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{
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hr = E_OUTOFMEMORY;
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}
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}
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}
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else if (lr == ERROR_SUCCESS && dwType != REG_SZ)
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{
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hr = E_FAIL;
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}
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else
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{
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hr = HRESULT_FROM_WIN32(lr);
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}
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return hr;
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}
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HRESULT
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CSafeReg::QueryStr(
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LPWSTR pwszValueName,
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LPWSTR pwszBuf,
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ULONG cchBuf)
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{
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||
|
|
// TRACE_METHOD(CSafeReg, QueryStr);
|
||
|
|
ASSERT(_hKey);
|
||
|
|
|
||
|
|
HRESULT hr = S_OK;
|
||
|
|
DWORD dwType;
|
||
|
|
|
||
|
|
*pwszBuf = L'\0'; // init for failure case
|
||
|
|
|
||
|
|
LONG lr;
|
||
|
|
ULONG cbBuf = cchBuf * sizeof(WCHAR);
|
||
|
|
|
||
|
|
lr = RegQueryValueEx(_hKey,
|
||
|
|
pwszValueName,
|
||
|
|
NULL,
|
||
|
|
&dwType,
|
||
|
|
(LPBYTE) pwszBuf,
|
||
|
|
&cbBuf);
|
||
|
|
|
||
|
|
if (lr == ERROR_SUCCESS &&
|
||
|
|
dwType != REG_SZ &&
|
||
|
|
dwType != REG_MULTI_SZ &&
|
||
|
|
dwType != REG_EXPAND_SZ)
|
||
|
|
{
|
||
|
|
hr = E_FAIL;
|
||
|
|
}
|
||
|
|
else if (lr != ERROR_SUCCESS)
|
||
|
|
{
|
||
|
|
hr = HRESULT_FROM_WIN32(lr);
|
||
|
|
}
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
//+--------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Member: CSafeReg::SetDword
|
||
|
|
//
|
||
|
|
// Synopsis: Set a value with name [wszValueName] and type REG_DWORD on
|
||
|
|
// the currently open key.
|
||
|
|
//
|
||
|
|
// Arguments: [wszValueName] - name of value to create or set
|
||
|
|
// [dw] - dword to set
|
||
|
|
//
|
||
|
|
// Returns: Result of RegSetValueEx call.
|
||
|
|
//
|
||
|
|
// History: 1-20-1997 DavidMun Created
|
||
|
|
//
|
||
|
|
//---------------------------------------------------------------------------
|
||
|
|
|
||
|
|
HRESULT
|
||
|
|
CSafeReg::SetDword(
|
||
|
|
LPWSTR wszValueName,
|
||
|
|
DWORD dw)
|
||
|
|
{
|
||
|
|
ASSERT(_hKey);
|
||
|
|
|
||
|
|
HRESULT hr = S_OK;
|
||
|
|
|
||
|
|
LONG lr = RegSetValueEx(_hKey,
|
||
|
|
wszValueName,
|
||
|
|
0,
|
||
|
|
REG_DWORD,
|
||
|
|
(PBYTE) &dw,
|
||
|
|
sizeof dw);
|
||
|
|
|
||
|
|
if (lr != ERROR_SUCCESS)
|
||
|
|
{
|
||
|
|
hr = HRESULT_FROM_WIN32(lr);
|
||
|
|
}
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
HRESULT
|
||
|
|
CSafeReg::SetValue(
|
||
|
|
LPCWSTR wszValueName,
|
||
|
|
ULONG ulType,
|
||
|
|
const BYTE *pbValue,
|
||
|
|
ULONG cbValue)
|
||
|
|
{
|
||
|
|
ASSERT(_hKey);
|
||
|
|
|
||
|
|
HRESULT hr = S_OK;
|
||
|
|
LONG lr = RegSetValueEx(_hKey,
|
||
|
|
wszValueName,
|
||
|
|
0,
|
||
|
|
ulType,
|
||
|
|
pbValue,
|
||
|
|
cbValue);
|
||
|
|
|
||
|
|
if (lr != ERROR_SUCCESS)
|
||
|
|
{
|
||
|
|
hr = HRESULT_FROM_WIN32(lr);
|
||
|
|
}
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|