/////////////////////////////////////////////////////////////////////////////// // Name: palmos/registry.h // Purpose: Registry classes and functions // Author: William Osborne // Modified by: // Created: 10/13/04 // RCS-ID: $Id: // Copyright: (c) William Osborne // Licence: wxWindows licence /////////////////////////////////////////////////////////////////////////////// #ifndef _REGISTRY_H #define _REGISTRY_H #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) #pragma interface "registry.h" #endif // ---------------------------------------------------------------------------- // types used in this module // ---------------------------------------------------------------------------- /* #ifndef HKEY_DEFINED #define HKEY_DEFINED #define HKEY unsigned long #endif */ typedef unsigned long ulong; // ---------------------------------------------------------------------------- // class wxRegKey encapsulates window HKEY handle // ---------------------------------------------------------------------------- class WXDLLIMPEXP_BASE wxRegKey { public: // NB: do _not_ change the values of elements in these enumerations! // registry value types (with comments from winnt.h) enum ValueType { Type_None, // No value type Type_String, // Unicode nul terminated string }; // predefined registry keys enum StdKey { HKCR // classes root }; // access mode for the key enum AccessMode { Read, // read-only Write // read and write }; // information about standard (predefined) registry keys // number of standard keys static const size_t nStdKeys; // get the name of a standard key static const wxChar *GetStdKeyName(size_t key); // get the short name of a standard key static const wxChar *GetStdKeyShortName(size_t key); // get StdKey from root HKEY static StdKey GetStdKeyFromHkey(WXHKEY hkey); // extacts the std key prefix from the string (return value) and // leaves only the part after it (i.e. modifies the string passed!) static StdKey ExtractKeyName(wxString& str); // ctors // root key is set to HKCR (the only root key under Win16) wxRegKey(); // strKey is the full name of the key (i.e. starting with HKEY_xxx...) wxRegKey(const wxString& strKey); // strKey is the name of key under (standard key) keyParent wxRegKey(StdKey keyParent, const wxString& strKey); // strKey is the name of key under (previously created) keyParent wxRegKey(const wxRegKey& keyParent, const wxString& strKey); // dtor closes the key ~wxRegKey(); // change key (closes the previously opened key if any) // the name is absolute, i.e. should start with HKEY_xxx void SetName(const wxString& strKey); // the name is relative to the parent key void SetName(StdKey keyParent, const wxString& strKey); // the name is relative to the parent key void SetName(const wxRegKey& keyParent, const wxString& strKey); // hKey should be opened and will be closed in wxRegKey dtor void SetHkey(WXHKEY hKey); // get infomation about the key // get the (full) key name. Abbreviate std root keys if bShortPrefix. wxString GetName(bool bShortPrefix = true) const; // return true if the key exists bool Exists() const; // get the info about key (any number of these pointers may be NULL) bool GetKeyInfo(size_t *pnSubKeys, // number of subkeys size_t *pnMaxKeyLen, // max len of subkey name size_t *pnValues, // number of values size_t *pnMaxValueLen) const; // return true if the key is opened bool IsOpened() const { return m_hKey != 0; } // for "if ( !key ) wxLogError(...)" kind of expressions operator bool() const { return m_dwLastError == 0; } // operations on the key itself // explicitly open the key (will be automatically done by all functions // which need the key to be opened if the key is not opened yet) bool Open(AccessMode mode = Write); // create the key: will fail if the key already exists and !bOkIfExists bool Create(bool bOkIfExists = true); // rename a value from old name to new one bool RenameValue(const wxChar *szValueOld, const wxChar *szValueNew); // rename the key bool Rename(const wxChar *szNewName); // copy value to another key possibly changing its name (by default it will // remain the same) bool CopyValue(const wxChar *szValue, wxRegKey& keyDst, const wxChar *szNewName = NULL); // copy the entire contents of the key recursively to another location bool Copy(const wxChar *szNewName); // same as Copy() but using a key and not the name bool Copy(wxRegKey& keyDst); // close the key (will be automatically done in dtor) bool Close(); // deleting keys/values // deletes this key and all of it's subkeys/values bool DeleteSelf(); // deletes the subkey with all of it's subkeys/values recursively bool DeleteKey(const wxChar *szKey); // deletes the named value (may be NULL to remove the default value) bool DeleteValue(const wxChar *szValue); // access to values and subkeys // get value type ValueType GetValueType(const wxChar *szValue) const; // returns true if the value contains a number (else it's some string) bool IsNumericValue(const wxChar *szValue) const; // assignment operators set the default value of the key wxRegKey& operator=(const wxString& strValue) { SetValue(NULL, strValue); return *this; } // query the default value of the key: implicitly or explicitly wxString QueryDefaultValue() const; operator wxString() const { return QueryDefaultValue(); } // named values // set the string value bool SetValue(const wxChar *szValue, const wxString& strValue); // retrieve the string value bool QueryValue(const wxChar *szValue, wxString& strValue) const { return QueryValue(szValue, strValue, false); } // retrieve raw string value bool QueryRawValue(const wxChar *szValue, wxString& strValue) const { return QueryValue(szValue, strValue, true); } // retrieve either raw or expanded string value bool QueryValue(const wxChar *szValue, wxString& strValue, bool raw) const; // query existence of a key/value // return true if value exists bool HasValue(const wxChar *szKey) const; // return true if given subkey exists bool HasSubKey(const wxChar *szKey) const; // return true if any subkeys exist bool HasSubkeys() const; // return true if any values exist bool HasValues() const; // return true if the key is empty (nothing under this key) bool IsEmpty() const { return !HasSubkeys() && !HasValues(); } // enumerate values and subkeys bool GetFirstValue(wxString& strValueName, long& lIndex); bool GetNextValue (wxString& strValueName, long& lIndex) const; bool GetFirstKey (wxString& strKeyName , long& lIndex); bool GetNextKey (wxString& strKeyName , long& lIndex) const; // for wxRegConfig usage only: preallocate some memory for the name void ReserveMemoryForName(size_t bytes) { m_strKey.reserve(bytes); } private: // common part of all ctors void Init() { m_hKey = (WXHKEY) NULL; m_dwLastError = 0; } // no copy ctor/assignment operator wxRegKey(const wxRegKey& key); // not implemented wxRegKey& operator=(const wxRegKey& key); // not implemented WXHKEY m_hKey, // our handle m_hRootKey; // handle of the top key (i.e. StdKey) wxString m_strKey; // key name (relative to m_hRootKey) long m_dwLastError; // last error (0 if none) }; #endif //_REGISTRY_H