913 lines
27 KiB
C++
913 lines
27 KiB
C++
//+---------------------------------------------------------------------------
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//
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// Copyright (C) 1992, Microsoft Corporation.
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//
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// File: registry.cxx
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//
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// Contents: implementations for CRegKey member Members
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//
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// Members: CRegKey::CRegKey - constructor for registry key object
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// CRegKey::CRegKey - constructor for registry key object
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// CRegKey::CreateKey - real worker for constructors
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// CRegKey::~CRegKey - destructor for registry key object
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// CRegKey::Delete - delete a registry key
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// CRegKey::EnumValues - enumerate values of a registry key
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// CRegKey::EnumKeys - enumerate subkeys of a registry key
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// CRegKey::NotifyChange - setup change notification for a key
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//
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// CRegValue::GetValue - sets a registry value
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// CRegValue::SetValue - retrieves a registry value
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// CRegValue::Delete - deletes a registry value
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// CRegValue::GetTypeCode - returns the type code of the value
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//
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// CRegMSZ::SetStrings - sets a multi-string registry value
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// CRegMSZ::GetStrings - retrieves a multi-string registry value
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//
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// History: 09/30/92 Rickhi Created
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// 09/22/93 AlokS Took out exception throwing code
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// and added proper return code for
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// each method.
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//
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// 07/26/94 AlokS Made it real light weight for simple
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// registry set/get operations
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//
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// Notes: see notes in registry.hxx
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//
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//----------------------------------------------------------------------------
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#include "headers.hxx"
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#pragma hdrstop
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#include <stdlib.h>
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#include <windows.h>
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#include <registry.hxx>
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//+-------------------------------------------------------------------------
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//
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// Member: CRegKey::CRegKey
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//
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// Synopsis: Constructor for registry key object, using HKEY for parent
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//
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// Arguments: [hkParent] - handle to parent key
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// [pwszPath] - pathname to key
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// [samDesiredAccess] - desired access rights to the key
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// [pwszClass] - class for the key
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// [dwOptions] - options for the key eg volatile or not
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// [pdwDisposition] - to find out if key was opened or created
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// [pSecurityAttributes] - used only if the key is created
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// [fThrowExceptionOnError] - Constructor throw exception on error
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//
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// Signals: Internal error state is set if construction fails.
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//
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// Returns: -none-
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//
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// History: 09/30/92 Rickhi Created
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//
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// Notes: All except the hkParent and pwszPath are optional parameters.
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//
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//--------------------------------------------------------------------------
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CRegKey::CRegKey (
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HKEY hkParent,
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const LPWSTR pwszPath,
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REGSAM samDesiredAccess,
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const LPWSTR pwszClass,
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DWORD dwOptions,
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DWORD *pdwDisposition,
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const LPSECURITY_ATTRIBUTES pSecurityAttributes )
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:_hkParent(hkParent),
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_hkThis(NULL),
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_dwErr (ERROR_SUCCESS)
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{
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_dwErr = CreateKey( _hkParent,
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pwszPath,
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samDesiredAccess,
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pwszClass,
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dwOptions,
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pdwDisposition,
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pSecurityAttributes );
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CRegKey::CRegKey
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//
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// Synopsis: Constructor for registry key object, using CRegKey for parent
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//
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// Arguments: [prkParent] - ptr to Parent CRegKey
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// [pwszPath] - pathname to key
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// [samDesiredAccess] - desired access rights to the key
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// [pwszClass] - class for the key
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// [dwOptions] - options for the key eg volatile or not
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// [pdwDisposition] - to find out if key was opened or created
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// [pSecurityAttributes] - used only if the key is created
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// [fThrowExceptionOnError] - Constructor throw exception on error
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//
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// Signals: Internal Error state is set if error occures during construction.
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//
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// Returns: nothing
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//
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// History: 09/30/92 Rickhi Created
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//
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// Notes: All except the prkParent and pwszPath are optional parameters.
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//
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//--------------------------------------------------------------------------
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CRegKey::CRegKey (
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const CRegKey &crkParent,
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const LPWSTR pwszPath,
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REGSAM samDesiredAccess,
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const LPWSTR pwszClass,
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DWORD dwOptions,
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DWORD *pdwDisposition,
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const LPSECURITY_ATTRIBUTES pSecurityAttributes )
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:_hkParent(crkParent.GetHandle()),
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_hkThis(NULL),
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_dwErr(ERROR_SUCCESS)
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{
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_dwErr = CreateKey ( _hkParent,
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pwszPath,
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samDesiredAccess,
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pwszClass,
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dwOptions,
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pdwDisposition,
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pSecurityAttributes );
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CRegKey::CRegKey
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//
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// Synopsis: Constructor for registry key object, using HKEY for parent
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// Merely opens the key, if exist
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//
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// Arguments: [hkParent] - HKEY to Parent
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// [dwErr] - Error code returned here
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// [pwszPath] - pathname to key
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// [samDesiredAccess] - desired access rights to the key
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//
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// Signals: Internal Error state is set if error occures during construction
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//
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// Returns: nothing
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//
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// History: 09/22/93 AlokS Created
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//
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// Notes: Check error status to determine if constructor succeeded
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//
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//--------------------------------------------------------------------------
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CRegKey::CRegKey (
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HKEY hkParent,
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DWORD *pdwErr,
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const LPWSTR pwszPath,
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REGSAM samDesiredAccess )
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:_hkParent(hkParent),
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_hkThis(NULL),
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_dwErr(ERROR_SUCCESS)
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{
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*pdwErr = _dwErr = OpenKey ( _hkParent, pwszPath, samDesiredAccess );
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CRegKey::CRegKey
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//
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// Synopsis: Constructor for registry key object, using CRegKey for parent
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// Merely opens the key, if exist
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//
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// Arguments: [prkParent] - ptr to Parent CRegKey
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// [dwErr] - Error code returned here.
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// [pwszPath] - pathname to key
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// [samDesiredAccess] - desired access rights to the key
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//
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// Signals: Internal Error state is set if error occures during construction
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//
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// Returns: nothing
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//
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// History: 09/22/93 AlokS Created
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//
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// Notes: Check error status to determine if constructor succeeded
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//
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//--------------------------------------------------------------------------
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CRegKey::CRegKey (
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const CRegKey &crkParent,
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DWORD *pdwErr,
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const LPWSTR pwszPath,
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REGSAM samDesiredAccess )
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:_hkParent(crkParent.GetHandle()),
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_hkThis(NULL),
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_dwErr(ERROR_SUCCESS)
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{
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IDfsVolInlineDebOut((
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DEB_TRACE, "CRegKey::+CRegKey(0x%x)\n",
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this));
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*pdwErr = _dwErr = OpenKey ( _hkParent, pwszPath, samDesiredAccess );
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CRegKey::~CRegKey, public
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//
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// Synopsis: Destructor for registry key object
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//
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// Arguments: none
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//
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// Signals: nothing
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//
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// Returns: nothing
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//
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// History: 09/30/92 Rickhi Created
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//
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// Notes:
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//
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//--------------------------------------------------------------------------
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CRegKey::~CRegKey()
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{
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IDfsVolInlineDebOut((
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DEB_TRACE, "CRegKey::~CRegKey(0x%x)\n",
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this));
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if (_hkThis != NULL) {
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RegCloseKey(_hkThis);
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}
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CRegKey::CreateKey, private
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//
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// Synopsis: This method does the real work of the constructors.
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//
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// Arguments: [hkParent] - handle to parent key
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// [pwszPath] - pathname to key
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// [samDesiredAccess] - desired access rights to the key
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// [pwszClass] - class for the key
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// [dwOptions] - options for the key eg volatile or not
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// [pdwDisposition] - to find out if key was opened or created
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// [pSecurityAttributes] - used only if the key is created
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//
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// Signals: -none-
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//
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// Returns: ERROR_SUCCESS on success. Else error from either Registry APIs
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// or from Memory allocation
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//
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// History: 09/30/92 Rickhi Created
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//
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// Notes: All parameters are required.
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//
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//--------------------------------------------------------------------------
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DWORD CRegKey::CreateKey (
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HKEY hkParent,
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const LPWSTR pwszPath,
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REGSAM samDesiredAccess,
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const LPWSTR pwszClass,
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DWORD dwOptions,
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DWORD *pdwDisposition,
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const LPSECURITY_ATTRIBUTES pSecurityAttributes )
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{
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DWORD dwDisposition;
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DWORD dwRc;
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DWORD dwErr = ERROR_SUCCESS;
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LPSECURITY_ATTRIBUTES lpsec = pSecurityAttributes;
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// create/open the key
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if ((dwRc = RegCreateKeyEx(hkParent,
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pwszPath, // path to key
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0, // title index
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pwszClass, // class of key
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dwOptions, // key options
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samDesiredAccess, // desired access
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lpsec, // if created
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&_hkThis, // handle
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&dwDisposition) // opened/created
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)==ERROR_SUCCESS)
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{
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// save away the name
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_cwszName.Set(pwszPath);
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// setup the return parameters
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if (pdwDisposition != NULL)
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*pdwDisposition = dwDisposition;
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}
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else
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dwErr = Creg_ERROR(dwRc);
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return(dwErr);
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CRegKey::OpenKey, private
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//
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// Synopsis: This method does the real work of the constructors.
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//
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// Arguments: [hkParent] - handle to parent key
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// [pwszPath] - pathname to key
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// [samDesiredAccess] - desired access rights to the key
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//
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// Signals: -none-
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//
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// Returns: ERROR_SUCCESS on success. Else error from either Registry APIs
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// or from Memory allocation
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//
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// History: 09/22/93 AlokS Created
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//
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// Notes: All parameters are required.
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//
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//--------------------------------------------------------------------------
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DWORD CRegKey::OpenKey (
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HKEY hkParent,
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const LPWSTR pwszPath,
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REGSAM samDesiredAccess )
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{
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DWORD dwRc;
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DWORD dwErr = ERROR_SUCCESS;
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// open the key
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if ((dwRc = RegOpenKeyEx(hkParent,
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pwszPath, // path to key
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0, // reserved
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samDesiredAccess, // desired access
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&_hkThis // handle
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))==ERROR_SUCCESS)
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{
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// save away the name
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_cwszName.Set(pwszPath);
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}
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else
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dwErr = Creg_ERROR(dwRc);
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return(dwErr);
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CRegKey::Delete, public
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//
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// Synopsis: Deletes an existing key from the registry. Note that
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// the key object still exists, the destructor must be
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// called seperately.
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//
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// Arguments: none
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//
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// Signals: -none-
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//
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// Returns: ERROR_SUCCESS on success. Else error from either Registry APIs
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// or from Memory allocation
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//
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// History: 09/30/92 Rickhi Created
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//
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// Notes:
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//
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//--------------------------------------------------------------------------
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DWORD CRegKey::Delete(void)
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{
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DWORD dwErr = ERROR_SUCCESS;
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DWORD dwRc;
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SRegKeySet *pChildren;
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dwErr = this->EnumKeys(&pChildren);
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if (dwErr == ERROR_SUCCESS) {
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ULONG i;
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DWORD dwErrDelete = ERROR_SUCCESS;
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for(i = 0; i < pChildren->cKeys; i++) {
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dwErr = pChildren->aprkKey[i]->Delete();
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if (dwErr != ERROR_SUCCESS) {
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dwErrDelete = dwErr;
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}
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delete pChildren->aprkKey[i];
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}
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if (dwErrDelete == ERROR_SUCCESS) {
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if (( dwRc= RegDeleteKey(_hkThis, NULL))!=ERROR_SUCCESS) {
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dwErr = Creg_ERROR(dwRc);
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}
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} else {
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dwErr = dwErrDelete;
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}
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delete pChildren;
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}
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return(dwErr);
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CRegKey::EnumValues, public
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//
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// Synopsis: Enumerates the values stored in an open registry key.
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//
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// Arguments: [pprvs] - SRegValueSet allocated and returned by this
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// method. The caller is responsible for releasing
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// the allocated CRegValue objects via delete and the
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// SRegValueSet structure via CRegKey::MemFree.
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//
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// Signals: none
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//
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// Returns: ERROR_SUCCESS on success. Else error from either Registry APIs
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// or from Memory allocation
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//
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// History: 09/30/92 Rickhi Created
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//
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// Notes: The data associated with each Value is not returned. The
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// caller may invoke the GetValue method of each CRegValue
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// returned to get it's associated data.
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//
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//--------------------------------------------------------------------------
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DWORD CRegKey::EnumValues(SRegValueSet **pprvs)
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{
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DWORD dwErr = ERROR_SUCCESS;
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// figure out how many values are currently stored in this key
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// and allocate a buffer to hold the return results.
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WCHAR wszClass[MAX_PATH];
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ULONG cbClass = sizeof(wszClass);
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ULONG cSubKeys, cbMaxSubKeyLen, cbMaxClassLen;
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ULONG cValues, cbMaxValueIDLen, cbMaxValueLen;
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SECURITY_DESCRIPTOR SecDescriptor;
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FILETIME ft;
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DWORD dwRc = RegQueryInfoKey(_hkThis,
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wszClass,
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&cbClass,
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NULL,
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&cSubKeys,
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&cbMaxSubKeyLen,
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&cbMaxClassLen,
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&cValues,
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&cbMaxValueIDLen,
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&cbMaxValueLen,
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(DWORD *)&SecDescriptor,
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&ft );
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if ( dwRc == ERROR_SUCCESS )
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{
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*pprvs = (SRegValueSet *) new BYTE [ sizeof(SRegValueSet)+
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cValues*sizeof(CRegValue *) ];
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if ( *pprvs == NULL )
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{
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dwErr = ERROR_OUTOFMEMORY;
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}
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}
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else
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{
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// QueryInfo failed.
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dwErr = Creg_ERROR(dwRc);
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}
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if (dwErr != ERROR_SUCCESS)
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{
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return(dwErr);
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}
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// loop enumerating and creating a RegValue object for each value
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DWORD dwIndex=0;
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do
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{
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WCHAR wszValueID[MAX_PATH];
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ULONG cbValueID = MAX_PATH;
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DWORD dwTypeCode;
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CRegValue *pRegVal;
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if ((dwRc = RegEnumValue(_hkThis, // handle
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dwIndex, // index
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wszValueID, // value id
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&cbValueID, // length of value name
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NULL, // title index
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&dwTypeCode, // data type
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NULL, // data buffer
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NULL // size of data buffer
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))==ERROR_SUCCESS)
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{
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// create the appropriate class of value object
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switch (dwTypeCode)
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{
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case REG_SZ:
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pRegVal = (CRegValue *) new CRegSZ((const CRegKey &)*this, wszValueID);
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break;
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case REG_DWORD:
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pRegVal = (CRegValue *) new CRegDWORD((const CRegKey &)*this, wszValueID);
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break;
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case REG_BINARY:
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pRegVal = (CRegValue *) new CRegBINARY((const CRegKey &)*this, wszValueID);
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break;
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default:
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pRegVal = (CRegValue *) new CRegBINARY((const CRegKey &)*this, wszValueID);
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break;
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}
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|
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// save ptr to value object and count another entry
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(*pprvs)->aprvValue[dwIndex++] = pRegVal;
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}
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else
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{
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// error, we're done with the enumeration
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break;
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}
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|
|
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} while (dwIndex < cValues);
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|
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// finished the enumeration, check the results
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if (dwRc == ERROR_NO_MORE_ITEMS || dwRc == ERROR_SUCCESS)
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{
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// set the return count
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(*pprvs)->cValues = dwIndex;
|
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}
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else
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{
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// Cleanup and return an error
|
|
while (dwIndex)
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{
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delete (*pprvs)->aprvValue[--dwIndex];
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}
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delete [] *pprvs;
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|
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dwErr = Creg_ERROR(dwRc);
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}
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|
|
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return(dwErr);
|
|
}
|
|
|
|
|
|
//+-------------------------------------------------------------------------
|
|
//
|
|
// Member: CRegKey::EnumKeys, public
|
|
//
|
|
// Synopsis: Enumerates the subkeys of an open registry key.
|
|
//
|
|
// Arguments: [pprks] - SRegKeySet allocated and returned by this method.
|
|
// The caller is responsible for releasing all the
|
|
// allocated CRegKey objects and the SRegKeySet
|
|
// structure.
|
|
//
|
|
// Signals: none
|
|
//
|
|
// Returns: ERROR_SUCCESS on success. Else error from either Registry APIs
|
|
// or from Memory allocation
|
|
//
|
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// History: 09/30/92 Rickhi Created
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//
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// Notes:
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//
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//--------------------------------------------------------------------------
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DWORD CRegKey::EnumKeys(SRegKeySet **pprks)
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{
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// figure out how many keys are currently stored in this key
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// and allocate a buffer to hold the return results.
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WCHAR wszClass[MAX_PATH];
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ULONG cbClass = sizeof(wszClass);
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ULONG cSubKeys, cbMaxSubKeyLen, cbMaxClassLen;
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ULONG cValues, cbMaxValueIDLen, cbMaxValueLen;
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SECURITY_DESCRIPTOR SecDescriptor;
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FILETIME ft;
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DWORD dwErr = ERROR_SUCCESS;
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DWORD dwRc = RegQueryInfoKey(_hkThis,
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wszClass,
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&cbClass,
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NULL,
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&cSubKeys,
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&cbMaxSubKeyLen,
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&cbMaxClassLen,
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&cValues,
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&cbMaxValueIDLen,
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&cbMaxValueLen,
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(DWORD *)&SecDescriptor,
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&ft);
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if ( dwRc == ERROR_SUCCESS )
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{
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*pprks = (SRegKeySet*) new BYTE [sizeof(SRegKeySet)+cSubKeys*sizeof(CRegKey *)];
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if ( *pprks == NULL )
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{
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dwErr = ERROR_OUTOFMEMORY;
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}
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}
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else
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{
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// QueryInfo failed..
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dwErr = Creg_ERROR(dwRc);
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}
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if (dwErr != ERROR_SUCCESS)
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{
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return(dwErr);
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}
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// loop enumerating and creating a RegKey object for each subkey
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DWORD dwIndex=0;
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do
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{
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WCHAR wszKeyName[MAX_PATH];
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ULONG cbKeyName = MAX_PATH;
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WCHAR wszClass[MAX_PATH];
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ULONG cbClass = MAX_PATH;
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FILETIME ft;
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if ((dwRc = RegEnumKeyEx(_hkThis, // handle
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dwIndex, // index
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wszKeyName, // key name
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&cbKeyName, // length of key name
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NULL, // title index
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wszClass, // class
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&cbClass, // length of class
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&ft // last write time
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))==ERROR_SUCCESS)
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{
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// Create a CRegKey object for the subkey
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CRegKey *pRegKey = (CRegKey *) new CRegKey((const CRegKey &)*this, wszKeyName);
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// bug 447481: check for null return from above.
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if (pRegKey == NULL)
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{
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dwErr = ERROR_OUTOFMEMORY;
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break;
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}
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if (ERROR_SUCCESS != (dwErr = pRegKey->QueryErrorStatus()))
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{
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break;
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}
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(*pprks)->aprkKey[dwIndex++] = pRegKey;
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}
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else
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{
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// error, we're done with the enumeration
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break;
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}
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} while (dwIndex < cSubKeys);
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// finished the enumeration, check the results
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if ((dwErr == ERROR_SUCCESS) &&
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((dwRc == ERROR_NO_MORE_ITEMS || dwRc == ERROR_SUCCESS)))
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{
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// set the return count
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(*pprks)->cKeys = dwIndex;
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}
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else
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{
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// Cleanup and return an error
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while (dwIndex)
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{
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delete (*pprks)->aprkKey[--dwIndex];
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}
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delete [] *pprks;
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dwErr = Creg_ERROR(dwRc);
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}
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return(dwErr);
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CRegValue::GetValue, public
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//
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// Purpose: Returns the data associated with a registry value.
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//
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// Arguements: [pbData] - ptr to buffer supplied by caller.
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// [cbData] - size of data buffer supplied.
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// [pdwTypeCode] - type of data returned.
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//
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// Signals:
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//
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// Returns: ERROR_SUCCESS on success. Else error from either Registry APIs
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// or from Memory allocation
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//
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// History: 09/30/92 Rickhi Created
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//
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// Notes:
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//
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//
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//
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//--------------------------------------------------------------------------
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DWORD CRegValue::GetValue(LPBYTE pbData, ULONG* pcbData, DWORD *pdwTypeCode)
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{
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DWORD dwRc = RegQueryValueEx(GetParentHandle(),
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(LPWSTR)_cwszValueID, // value id
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NULL, // title index
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pdwTypeCode, // type of data returned
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pbData, // data
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pcbData); // size of data
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return(dwRc);
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CRegValue::SetValue
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//
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// Purpose: Writes the data associated with a registry value.
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//
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// Arguements: [pbData] - ptr to data to write.
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// [cbData] - size of data to write.
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// [dwTypeCode] - type of data to write.
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//
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// Signals: -none-
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//
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// Returns: ERROR_SUCCESS on success. Else error from either Registry APIs
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// or from Memory allocation
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//
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// History: 09/30/92 Rickhi Created
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//
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// Notes:
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//
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//--------------------------------------------------------------------------
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DWORD CRegValue::SetValue(const LPBYTE pbData, ULONG cbData, DWORD dwTypeCode)
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{
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DWORD dwRc;
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DWORD dwErr = ERROR_SUCCESS;
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if ((dwRc = RegSetValueEx(GetParentHandle(), // key handle
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(LPWSTR)_cwszValueID, // value id
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NULL, // title index
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dwTypeCode, // type of info in buffer
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pbData, // data
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cbData) // size of data
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)!= ERROR_SUCCESS)
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{
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dwErr = Creg_ERROR(dwRc);
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}
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return(dwErr);
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}
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//+-------------------------------------------------------------------------
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//
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// Function: DelRegKeyTree
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//
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// Purpose: Deletes a key and any of it's children. This is like
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// delnode for registry
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//
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// Arguements: [hParent] - Handle to Parent Key
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// [lpwszKeyPath] - Path (relative to Parent) of the key
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//
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// Signals:
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//
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// Returns: ERROR_SUCCESS on success. Else error from either Registry APIs
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// or from Memory allocation
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//
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// History: 09/30/93 AlokS Created
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//
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// Notes:
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//
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//--------------------------------------------------------------------------
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DWORD DelRegKeyTree ( HKEY hParent, LPWSTR lpwszKeyPath)
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{
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DWORD dwErr = ERROR_SUCCESS;
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CRegKey cregKey ( hParent,
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lpwszKeyPath
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);
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if (ERROR_SUCCESS != (dwErr = cregKey.QueryErrorStatus()))
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{
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return(dwErr);
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}
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// Enumerate the children of the key. We will
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// not propogate to the caller errors from enumeration
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SRegKeySet *pRegKeySet = NULL;
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if (ERROR_SUCCESS == (dwErr = cregKey.EnumKeys ( & pRegKeySet)))
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{
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// Now we have set of Keys which need to be deleted in depth
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// first manner
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for (ULONG i = 0; i < pRegKeySet->cKeys; i++ )
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{
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dwErr = DelRegKeyTree ( cregKey.GetHandle(),
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pRegKeySet->aprkKey[i]->GetName()
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);
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// Delete the key itself
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delete pRegKeySet->aprkKey[i];
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}
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// Delete the enumerator structure
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delete pRegKeySet;
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}
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// Finally delete this key
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dwErr = cregKey.Delete();
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return(dwErr);
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}
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DWORD CRegKey::DeleteChildren()
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{
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// figure out how many keys are currently stored in this key
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ULONG cSubKeys, cbMaxSubKeyLen;
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DWORD dwErr = ERROR_SUCCESS;
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DWORD dwRc = RegQueryInfoKey(_hkThis,
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NULL,
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NULL,
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NULL,
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&cSubKeys,
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&cbMaxSubKeyLen,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL);
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if ( dwRc != ERROR_SUCCESS )
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{
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// QueryInfo failed..
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dwErr = Creg_ERROR(dwRc);
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}
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if (dwErr != ERROR_SUCCESS)
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{
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return(dwErr);
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}
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// loop enumerating and creating a RegKey object for each subkey
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DWORD dwIndex=0;
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do
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{
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WCHAR wszKeyName[MAX_PATH];
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ULONG cbKeyName = sizeof(wszKeyName);
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FILETIME ft;
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if ((dwRc = RegEnumKeyEx(_hkThis, // handle
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dwIndex, // index
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wszKeyName, // key name
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&cbKeyName, // length of key name
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NULL, // title index
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NULL, // class
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NULL, // length of class
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&ft // last write time
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))==ERROR_SUCCESS)
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{
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// Create a CRegKey object for the subkey
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CRegKey *pRegKey = (CRegKey *) new CRegKey((const CRegKey &)*this, wszKeyName);
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if (ERROR_SUCCESS != (dwErr = pRegKey->QueryErrorStatus()))
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{
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break;
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}
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pRegKey->DeleteChildren();
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delete pRegKey;
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dwRc = RegDeleteKey(_hkThis, wszKeyName);
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}
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else
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{
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// error, we're done with the enumeration
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break;
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}
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} while (dwIndex < cSubKeys);
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// finished the enumeration, check the results
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if ((dwErr == ERROR_SUCCESS) &&
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(dwRc != ERROR_NO_MORE_ITEMS && dwRc != ERROR_SUCCESS))
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{
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dwErr = Creg_ERROR(dwRc);
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}
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return(dwErr);
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}
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