248 lines
9.4 KiB
C++
248 lines
9.4 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/msw/registry.h
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// Purpose: Registry classes and functions
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 03.04.1998
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// RCS-ID: $Id: registry.h 49563 2007-10-31 20:46:21Z VZ $
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// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_MSW_REGISTRY_H_
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#define _WX_MSW_REGISTRY_H_
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class WXDLLIMPEXP_FWD_BASE wxOutputStream;
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// ----------------------------------------------------------------------------
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// class wxRegKey encapsulates window HKEY handle
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxRegKey
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{
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public:
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// NB: do _not_ change the values of elements in these enumerations!
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// registry value types (with comments from winnt.h)
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enum ValueType
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{
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Type_None, // No value type
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Type_String, // Unicode nul terminated string
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Type_Expand_String, // Unicode nul terminated string
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// (with environment variable references)
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Type_Binary, // Free form binary
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Type_Dword, // 32-bit number
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Type_Dword_little_endian // 32-bit number
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= Type_Dword, // (same as Type_DWORD)
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Type_Dword_big_endian, // 32-bit number
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Type_Link, // Symbolic Link (unicode)
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Type_Multi_String, // Multiple Unicode strings
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Type_Resource_list, // Resource list in the resource map
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Type_Full_resource_descriptor, // Resource list in the hardware description
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Type_Resource_requirements_list // ???
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};
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// predefined registry keys
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enum StdKey
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{
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HKCR, // classes root
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HKCU, // current user
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HKLM, // local machine
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HKUSR, // users
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HKPD, // performance data (WinNT/2K only)
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HKCC, // current config
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HKDD, // dynamic data (Win95/98 only)
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HKMAX
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};
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// access mode for the key
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enum AccessMode
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{
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Read, // read-only
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Write // read and write
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};
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// information about standard (predefined) registry keys
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// number of standard keys
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static const size_t nStdKeys;
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// get the name of a standard key
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static const wxChar *GetStdKeyName(size_t key);
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// get the short name of a standard key
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static const wxChar *GetStdKeyShortName(size_t key);
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// get StdKey from root HKEY
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static StdKey GetStdKeyFromHkey(WXHKEY hkey);
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// extacts the std key prefix from the string (return value) and
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// leaves only the part after it (i.e. modifies the string passed!)
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static StdKey ExtractKeyName(wxString& str);
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// ctors
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// root key is set to HKCR (the only root key under Win16)
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wxRegKey();
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// strKey is the full name of the key (i.e. starting with HKEY_xxx...)
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wxRegKey(const wxString& strKey);
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// strKey is the name of key under (standard key) keyParent
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wxRegKey(StdKey keyParent, const wxString& strKey);
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// strKey is the name of key under (previously created) keyParent
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wxRegKey(const wxRegKey& keyParent, const wxString& strKey);
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// dtor closes the key
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~wxRegKey();
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// change key (closes the previously opened key if any)
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// the name is absolute, i.e. should start with HKEY_xxx
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void SetName(const wxString& strKey);
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// the name is relative to the parent key
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void SetName(StdKey keyParent, const wxString& strKey);
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// the name is relative to the parent key
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void SetName(const wxRegKey& keyParent, const wxString& strKey);
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// hKey should be opened and will be closed in wxRegKey dtor
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void SetHkey(WXHKEY hKey);
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// get infomation about the key
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// get the (full) key name. Abbreviate std root keys if bShortPrefix.
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wxString GetName(bool bShortPrefix = true) const;
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// return true if the key exists
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bool Exists() const;
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// get the info about key (any number of these pointers may be NULL)
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bool GetKeyInfo(size_t *pnSubKeys, // number of subkeys
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size_t *pnMaxKeyLen, // max len of subkey name
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size_t *pnValues, // number of values
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size_t *pnMaxValueLen) const;
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// return true if the key is opened
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bool IsOpened() const { return m_hKey != 0; }
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// for "if ( !key ) wxLogError(...)" kind of expressions
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operator bool() const { return m_dwLastError == 0; }
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// operations on the key itself
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// explicitly open the key (will be automatically done by all functions
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// which need the key to be opened if the key is not opened yet)
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bool Open(AccessMode mode = Write);
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// create the key: will fail if the key already exists and !bOkIfExists
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bool Create(bool bOkIfExists = true);
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// rename a value from old name to new one
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bool RenameValue(const wxChar *szValueOld, const wxChar *szValueNew);
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// rename the key
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bool Rename(const wxChar *szNewName);
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// copy value to another key possibly changing its name (by default it will
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// remain the same)
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bool CopyValue(const wxChar *szValue, wxRegKey& keyDst,
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const wxChar *szNewName = NULL);
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// copy the entire contents of the key recursively to another location
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bool Copy(const wxChar *szNewName);
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// same as Copy() but using a key and not the name
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bool Copy(wxRegKey& keyDst);
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// close the key (will be automatically done in dtor)
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bool Close();
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// deleting keys/values
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// deletes this key and all of it's subkeys/values
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bool DeleteSelf();
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// deletes the subkey with all of it's subkeys/values recursively
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bool DeleteKey(const wxChar *szKey);
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// deletes the named value (may be NULL to remove the default value)
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bool DeleteValue(const wxChar *szValue);
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// access to values and subkeys
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// get value type
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ValueType GetValueType(const wxChar *szValue) const;
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// returns true if the value contains a number (else it's some string)
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bool IsNumericValue(const wxChar *szValue) const;
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// assignment operators set the default value of the key
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wxRegKey& operator=(const wxString& strValue)
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{ SetValue(NULL, strValue); return *this; }
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wxRegKey& operator=(long lValue)
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{ SetValue(NULL, lValue); return *this; }
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// query the default value of the key: implicitly or explicitly
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wxString QueryDefaultValue() const;
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operator wxString() const { return QueryDefaultValue(); }
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// named values
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// set the string value
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bool SetValue(const wxChar *szValue, const wxString& strValue);
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// retrieve the string value
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bool QueryValue(const wxChar *szValue, wxString& strValue) const
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{ return QueryValue(szValue, strValue, false); }
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// retrieve raw string value
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bool QueryRawValue(const wxChar *szValue, wxString& strValue) const
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{ return QueryValue(szValue, strValue, true); }
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// retrieve either raw or expanded string value
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bool QueryValue(const wxChar *szValue, wxString& strValue, bool raw) const;
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// set the numeric value
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bool SetValue(const wxChar *szValue, long lValue);
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// return the numeric value
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bool QueryValue(const wxChar *szValue, long *plValue) const;
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// set the binary value
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bool SetValue(const wxChar *szValue, const wxMemoryBuffer& buf);
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// return the binary value
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bool QueryValue(const wxChar *szValue, wxMemoryBuffer& buf) const;
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// query existence of a key/value
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// return true if value exists
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bool HasValue(const wxChar *szKey) const;
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// return true if given subkey exists
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bool HasSubKey(const wxChar *szKey) const;
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// return true if any subkeys exist
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bool HasSubkeys() const;
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// return true if any values exist
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bool HasValues() const;
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// return true if the key is empty (nothing under this key)
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bool IsEmpty() const { return !HasSubkeys() && !HasValues(); }
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// enumerate values and subkeys
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bool GetFirstValue(wxString& strValueName, long& lIndex);
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bool GetNextValue (wxString& strValueName, long& lIndex) const;
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bool GetFirstKey (wxString& strKeyName , long& lIndex);
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bool GetNextKey (wxString& strKeyName , long& lIndex) const;
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// export the contents of this key and all its subkeys to the given file
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// (which won't be overwritten, it's an error if it already exists)
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//
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// note that we export the key in REGEDIT4 format, not RegSaveKey() binary
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// format nor newer REGEDIT5 one
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bool Export(const wxString& filename) const;
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// same as above but write to the given (opened) stream
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bool Export(wxOutputStream& ostr) const;
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// for wxRegConfig usage only: preallocate some memory for the name
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void ReserveMemoryForName(size_t bytes) { m_strKey.reserve(bytes); }
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private:
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// common part of all ctors
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void Init()
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{
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m_hKey = (WXHKEY) NULL;
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m_dwLastError = 0;
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}
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// recursive helper for Export()
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bool DoExport(wxOutputStream& ostr) const;
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// export a single value
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bool DoExportValue(wxOutputStream& ostr, const wxString& name) const;
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// return the text representation (in REGEDIT4 format) of the value with the
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// given name
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wxString FormatValue(const wxString& name) const;
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WXHKEY m_hKey, // our handle
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m_hRootKey; // handle of the top key (i.e. StdKey)
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wxString m_strKey; // key name (relative to m_hRootKey)
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AccessMode m_mode; // valid only if key is opened
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long m_dwLastError; // last error (0 if none)
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DECLARE_NO_COPY_CLASS(wxRegKey)
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};
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#endif // _WX_MSW_REGISTRY_H_
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