X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/223d09f6b523aac674ef9b72a883dfa8d37c5d4e..a6de78177ede61ca0e379105b02dd1eafebf133c:/src/common/fileconf.cpp

diff --git a/src/common/fileconf.cpp b/src/common/fileconf.cpp
index 6b33a83545..3a25662db7 100644
--- a/src/common/fileconf.cpp
+++ b/src/common/fileconf.cpp
@@ -1,5 +1,5 @@
 ///////////////////////////////////////////////////////////////////////////////
-// Name:        fileconf.cpp
+// Name:        src/common/fileconf.cpp
 // Purpose:     implementation of wxFileConfig derivation of wxConfig
 // Author:      Vadim Zeitlin
 // Modified by:
@@ -7,13 +7,9 @@
 // RCS-ID:      $Id$
 // Copyright:   (c) 1997 Karsten Ballüder   &  Vadim Zeitlin
 //                       Ballueder@usa.net     <zeitlin@dptmaths.ens-cachan.fr>
-// Licence:     wxWindows license
+// Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
-#ifdef __GNUG__
-#pragma implementation "fileconf.h"
-#endif
-
 // ----------------------------------------------------------------------------
 // headers
 // ----------------------------------------------------------------------------
@@ -24,7 +20,7 @@
   #pragma hdrstop
 #endif  //__BORLANDC__
 
-#if wxUSE_CONFIG
+#if wxUSE_CONFIG && wxUSE_FILECONFIG
 
 #ifndef   WX_PRECOMP
   #include  "wx/string.h"
@@ -36,22 +32,28 @@
 #include  "wx/file.h"
 #include  "wx/log.h"
 #include  "wx/textfile.h"
+#include  "wx/memtext.h"
 #include  "wx/config.h"
 #include  "wx/fileconf.h"
+#include  "wx/filefn.h"
+
+#if wxUSE_STREAMS
+    #include  "wx/stream.h"
+#endif // wxUSE_STREAMS
 
 #include  "wx/utils.h"    // for wxGetHomeDir
 
-// _WINDOWS_ is defined when windows.h is included,
-// __WXMSW__ is defined for MS Windows compilation
-#if       defined(__WXMSW__) && !defined(_WINDOWS_)
-  #include  <windows.h>
+#if defined(__WXMAC__)
+  #include  "wx/mac/private.h"  // includes mac headers
+  #include  "wx/filename.h"     // for MacSetTypeAndCreator
+#endif
+
+#if defined(__WXMSW__)
+  #include "wx/msw/private.h"
 #endif  //windows.h
 #if defined(__WXPM__)
   #define INCL_DOS
   #include <os2.h>
-  #define LINKAGEMODE _Optlink
-#else
-  #define LINKAGEMODE
 #endif
 
 #include  <stdlib.h>
@@ -65,17 +67,20 @@
 // ----------------------------------------------------------------------------
 // constants
 // ----------------------------------------------------------------------------
+
 #ifndef MAX_PATH
   #define MAX_PATH 512
 #endif
 
+#define FILECONF_TRACE_MASK _T("fileconf")
+
 // ----------------------------------------------------------------------------
 // global functions declarations
 // ----------------------------------------------------------------------------
 
 // compare functions for sorting the arrays
-static int LINKAGEMODE CompareEntries(ConfigEntry *p1, ConfigEntry *p2);
-static int LINKAGEMODE CompareGroups(ConfigGroup *p1, ConfigGroup *p2);
+static int LINKAGEMODE CompareEntries(wxFileConfigEntry *p1, wxFileConfigEntry *p2);
+static int LINKAGEMODE CompareGroups(wxFileConfigGroup *p1, wxFileConfigGroup *p2);
 
 // filter strings
 static wxString FilterInValue(const wxString& str);
@@ -87,6 +92,168 @@ static wxString FilterOutEntryName(const wxString& str);
 // get the name to use in wxFileConfig ctor
 static wxString GetAppName(const wxString& appname);
 
+// ============================================================================
+// private classes
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// "template" array types
+// ----------------------------------------------------------------------------
+
+#ifdef WXMAKINGDLL_BASE
+    WX_DEFINE_SORTED_USER_EXPORTED_ARRAY(wxFileConfigEntry *, ArrayEntries,
+                                         WXDLLIMPEXP_BASE);
+    WX_DEFINE_SORTED_USER_EXPORTED_ARRAY(wxFileConfigGroup *, ArrayGroups,
+                                         WXDLLIMPEXP_BASE);
+#else
+    WX_DEFINE_SORTED_ARRAY(wxFileConfigEntry *, ArrayEntries);
+    WX_DEFINE_SORTED_ARRAY(wxFileConfigGroup *, ArrayGroups);
+#endif
+
+// ----------------------------------------------------------------------------
+// wxFileConfigLineList
+// ----------------------------------------------------------------------------
+
+// we store all lines of the local config file as a linked list in memory
+class wxFileConfigLineList
+{
+public:
+  void SetNext(wxFileConfigLineList *pNext)  { m_pNext = pNext; }
+  void SetPrev(wxFileConfigLineList *pPrev)  { m_pPrev = pPrev; }
+
+  // ctor
+  wxFileConfigLineList(const wxString& str,
+                       wxFileConfigLineList *pNext = NULL) : m_strLine(str)
+    { SetNext(pNext); SetPrev(NULL); }
+
+  // next/prev nodes in the linked list
+  wxFileConfigLineList *Next() const { return m_pNext;  }
+  wxFileConfigLineList *Prev() const { return m_pPrev;  }
+
+  // get/change lines text
+  void SetText(const wxString& str) { m_strLine = str;  }
+  const wxString& Text() const { return m_strLine; }
+
+private:
+  wxString  m_strLine;                  // line contents
+  wxFileConfigLineList *m_pNext,        // next node
+                       *m_pPrev;        // previous one
+
+    DECLARE_NO_COPY_CLASS(wxFileConfigLineList)
+};
+
+// ----------------------------------------------------------------------------
+// wxFileConfigEntry: a name/value pair
+// ----------------------------------------------------------------------------
+
+class wxFileConfigEntry
+{
+private:
+  wxFileConfigGroup *m_pParent; // group that contains us
+
+  wxString      m_strName,      // entry name
+                m_strValue;     //       value
+  bool          m_bImmutable:1, // can be overriden locally?
+                m_bHasValue:1;  // set after first call to SetValue()
+
+  int           m_nLine;        // used if m_pLine == NULL only
+
+  // pointer to our line in the linked list or NULL if it was found in global
+  // file (which we don't modify)
+  wxFileConfigLineList *m_pLine;
+
+public:
+  wxFileConfigEntry(wxFileConfigGroup *pParent,
+                    const wxString& strName, int nLine);
+
+  // simple accessors
+  const wxString& Name()        const { return m_strName;    }
+  const wxString& Value()       const { return m_strValue;   }
+  wxFileConfigGroup *Group()    const { return m_pParent;    }
+  bool            IsImmutable() const { return m_bImmutable; }
+  bool            IsLocal()     const { return m_pLine != 0; }
+  int             Line()        const { return m_nLine;      }
+  wxFileConfigLineList *
+                  GetLine()     const { return m_pLine;      }
+
+  // modify entry attributes
+  void SetValue(const wxString& strValue, bool bUser = true);
+  void SetLine(wxFileConfigLineList *pLine);
+
+    DECLARE_NO_COPY_CLASS(wxFileConfigEntry)
+};
+
+// ----------------------------------------------------------------------------
+// wxFileConfigGroup: container of entries and other groups
+// ----------------------------------------------------------------------------
+
+class wxFileConfigGroup
+{
+private:
+  wxFileConfig *m_pConfig;          // config object we belong to
+  wxFileConfigGroup  *m_pParent;    // parent group (NULL for root group)
+  ArrayEntries  m_aEntries;         // entries in this group
+  ArrayGroups   m_aSubgroups;       // subgroups
+  wxString      m_strName;          // group's name
+  wxFileConfigLineList *m_pLine;    // pointer to our line in the linked list
+  wxFileConfigEntry *m_pLastEntry;  // last entry/subgroup of this group in the
+  wxFileConfigGroup *m_pLastGroup;  // local file (we insert new ones after it)
+
+  // DeleteSubgroupByName helper
+  bool DeleteSubgroup(wxFileConfigGroup *pGroup);
+
+  // used by Rename()
+  void UpdateGroupAndSubgroupsLines();
+
+public:
+  // ctor
+  wxFileConfigGroup(wxFileConfigGroup *pParent, const wxString& strName, wxFileConfig *);
+
+  // dtor deletes all entries and subgroups also
+  ~wxFileConfigGroup();
+
+  // simple accessors
+  const wxString& Name()    const { return m_strName; }
+  wxFileConfigGroup    *Parent()  const { return m_pParent; }
+  wxFileConfig   *Config()  const { return m_pConfig; }
+
+  const ArrayEntries& Entries() const { return m_aEntries;   }
+  const ArrayGroups&  Groups()  const { return m_aSubgroups; }
+  bool  IsEmpty() const { return Entries().IsEmpty() && Groups().IsEmpty(); }
+
+  // find entry/subgroup (NULL if not found)
+  wxFileConfigGroup *FindSubgroup(const wxChar *szName) const;
+  wxFileConfigEntry *FindEntry   (const wxChar *szName) const;
+
+  // delete entry/subgroup, return false if doesn't exist
+  bool DeleteSubgroupByName(const wxChar *szName);
+  bool DeleteEntry(const wxChar *szName);
+
+  // create new entry/subgroup returning pointer to newly created element
+  wxFileConfigGroup *AddSubgroup(const wxString& strName);
+  wxFileConfigEntry *AddEntry   (const wxString& strName, int nLine = wxNOT_FOUND);
+
+  void SetLine(wxFileConfigLineList *pLine);
+
+  // rename: no checks are done to ensure that the name is unique!
+  void Rename(const wxString& newName);
+
+  //
+  wxString GetFullName() const;
+
+  // get the last line belonging to an entry/subgroup of this group
+  wxFileConfigLineList *GetGroupLine();     // line which contains [group]
+  wxFileConfigLineList *GetLastEntryLine(); // after which our subgroups start
+  wxFileConfigLineList *GetLastGroupLine(); // after which the next group starts
+
+  // called by entries/subgroups when they're created/deleted
+  void SetLastEntry(wxFileConfigEntry *pEntry);
+  void SetLastGroup(wxFileConfigGroup *pGroup)
+    { m_pLastGroup = pGroup; }
+
+  DECLARE_NO_COPY_CLASS(wxFileConfigGroup)
+};
+
 // ============================================================================
 // implementation
 // ============================================================================
@@ -98,160 +265,110 @@ wxString wxFileConfig::GetGlobalDir()
 {
   wxString strDir;
 
-  #ifdef __UNIX__
+#ifdef __VMS__ // Note if __VMS is defined __UNIX is also defined
+    strDir = wxT("sys$manager:");
+#elif defined(__WXMAC__)
+    strDir = wxMacFindFolder(  (short) kOnSystemDisk, kPreferencesFolderType, kDontCreateFolder ) ;
+#elif defined( __UNIX__ )
     strDir = wxT("/etc/");
-  #elif defined(__WXPM__)
-    ULONG                           aulSysInfo[QSV_MAX] = {0};
-    UINT                            drive;
-    APIRET                          rc;
+#elif defined(__OS2__)
+    ULONG aulSysInfo[QSV_MAX] = {0};
+    UINT drive;
+    APIRET rc;
 
     rc = DosQuerySysInfo( 1L, QSV_MAX, (PVOID)aulSysInfo, sizeof(ULONG)*QSV_MAX);
     if (rc == 0)
     {
         drive = aulSysInfo[QSV_BOOT_DRIVE - 1];
-        switch(drive)
-        {
-           case 1:
-              strDir = "A:\\OS2\\";
-              break;
-           case 2:
-              strDir = "B:\\OS2\\";
-              break;
-           case 3:
-              strDir = "C:\\OS2\\";
-              break;
-           case 4:
-              strDir = "D:\\OS2\\";
-              break;
-           case 5:
-              strDir = "E:\\OS2\\";
-              break;
-           case 6:
-              strDir = "F:\\OS2\\";
-              break;
-           case 7:
-              strDir = "G:\\OS2\\";
-              break;
-           case 8:
-              strDir = "H:\\OS2\\";
-              break;
-           case 9:
-              strDir = "I:\\OS2\\";
-              break;
-           case 10:
-              strDir = "J:\\OS2\\";
-              break;
-           case 11:
-              strDir = "K:\\OS2\\";
-              break;
-           case 12:
-              strDir = "L:\\OS2\\";
-              break;
-           case 13:
-              strDir = "M:\\OS2\\";
-              break;
-           case 14:
-              strDir = "N:\\OS2\\";
-              break;
-           case 15:
-              strDir = "O:\\OS2\\";
-              break;
-           case 16:
-              strDir = "P:\\OS2\\";
-              break;
-           case 17:
-              strDir = "Q:\\OS2\\";
-              break;
-           case 18:
-              strDir = "R:\\OS2\\";
-              break;
-           case 19:
-              strDir = "S:\\OS2\\";
-              break;
-           case 20:
-              strDir = "T:\\OS2\\";
-              break;
-           case 21:
-              strDir = "U:\\OS2\\";
-              break;
-           case 22:
-              strDir = "V:\\OS2\\";
-              break;
-           case 23:
-              strDir = "W:\\OS2\\";
-              break;
-           case 24:
-              strDir = "X:\\OS2\\";
-              break;
-           case 25:
-              strDir = "Y:\\OS2\\";
-              break;
-           case 26:
-              strDir = "Z:\\OS2\\";
-              break;
-        }
+        strDir.Printf(wxT("%c:\\OS2\\"), 'A'+drive-1);
     }
-  #elif defined(__WXSTUBS__)
-    wxASSERT_MSG( FALSE, wxT("TODO") ) ;
-  #elif defined(__WXMAC__)
-    wxASSERT_MSG( FALSE, wxT("TODO") ) ;
-  #else // Windows
+#elif defined(__WXSTUBS__)
+    wxASSERT_MSG( false, wxT("TODO") ) ;
+#elif defined(__DOS__)
+    // There's no such thing as global cfg dir in MS-DOS, let's return
+    // current directory (FIXME_MGL?)
+    strDir = wxT(".\\");
+#elif defined(__WXWINCE__)
+    strDir = wxT("\\Windows\\");
+#else // Windows
+
     wxChar szWinDir[MAX_PATH];
     ::GetWindowsDirectory(szWinDir, MAX_PATH);
 
     strDir = szWinDir;
     strDir << wxT('\\');
-  #endif // Unix/Windows
+#endif // Unix/Windows
 
-  return strDir;
+    return strDir;
 }
 
 wxString wxFileConfig::GetLocalDir()
 {
-  wxString strDir;
+    wxString strDir;
 
-  wxGetHomeDir(&strDir);
+#if defined(__WXMAC__) || defined(__DOS__)
+    // no local dir concept on Mac OS 9 or MS-DOS
+    return GetGlobalDir() ;
+#else
+    wxGetHomeDir(&strDir);
 
 #ifdef  __UNIX__
-  if (strDir.Last() != wxT('/')) strDir << wxT('/');
+#ifdef __VMS
+    if (strDir.Last() != wxT(']'))
+#endif
+    if (strDir.Last() != wxT('/')) strDir << wxT('/');
 #else
-  if (strDir.Last() != wxT('\\')) strDir << wxT('\\');
+    if (strDir.Last() != wxT('\\')) strDir << wxT('\\');
+#endif
 #endif
 
-  return strDir;
+    return strDir;
 }
 
 wxString wxFileConfig::GetGlobalFileName(const wxChar *szFile)
 {
-  wxString str = GetGlobalDir();
-  str << szFile;
-
-  if ( wxStrchr(szFile, wxT('.')) == NULL )
-  #ifdef  __UNIX__
-    str << wxT(".conf");
-  #else   // Windows
-    str << wxT(".ini");
-  #endif  // UNIX/Win
+    wxString str = GetGlobalDir();
+    str << szFile;
 
-  return str;
+    if ( wxStrchr(szFile, wxT('.')) == NULL )
+#if defined( __WXMAC__ )
+        str << wxT(" Preferences") ;
+#elif defined( __UNIX__ )
+        str << wxT(".conf");
+#else   // Windows
+        str << wxT(".ini");
+#endif  // UNIX/Win
+
+    return str;
 }
 
 wxString wxFileConfig::GetLocalFileName(const wxChar *szFile)
 {
-  wxString str = GetLocalDir();
+#ifdef __VMS__
+    // On VMS I saw the problem that the home directory was appended
+    // twice for the configuration file. Does that also happen for
+    // other platforms?
+    wxString str = wxT( '.' );
+#else
+    wxString str = GetLocalDir();
+#endif
 
-  #ifdef  __UNIX__
+#if defined( __UNIX__ ) && !defined( __VMS ) && !defined( __WXMAC__ )
     str << wxT('.');
-  #endif
+#endif
 
-  str << szFile;
+    str << szFile;
 
-  #ifdef __WXMSW__
+#if defined(__WINDOWS__) || defined(__DOS__)
     if ( wxStrchr(szFile, wxT('.')) == NULL )
-      str << wxT(".ini");
-  #endif
+        str << wxT(".ini");
+#endif
+
+#ifdef __WXMAC__
+    str << wxT(" Preferences") ;
+#endif
 
-  return str;
+    return str;
 }
 
 // ----------------------------------------------------------------------------
@@ -260,126 +377,226 @@ wxString wxFileConfig::GetLocalFileName(const wxChar *szFile)
 
 void wxFileConfig::Init()
 {
-  m_pCurrentGroup =
-  m_pRootGroup    = new ConfigGroup(NULL, "", this);
+    m_pCurrentGroup =
+    m_pRootGroup    = new wxFileConfigGroup(NULL, wxEmptyString, this);
 
-  m_linesHead =
-  m_linesTail = NULL;
+    m_linesHead =
+    m_linesTail = NULL;
 
-  // it's not an error if (one of the) file(s) doesn't exist
+    // It's not an error if (one of the) file(s) doesn't exist.
 
-  // parse the global file
-  if ( !m_strGlobalFile.IsEmpty() && wxFile::Exists(m_strGlobalFile) ) {
-    wxTextFile fileGlobal(m_strGlobalFile);
+    // parse the global file
+    if ( !m_strGlobalFile.empty() && wxFile::Exists(m_strGlobalFile) )
+    {
+        wxTextFile fileGlobal(m_strGlobalFile);
 
-    if ( fileGlobal.Open() ) {
-      Parse(fileGlobal, FALSE /* global */);
-      SetRootPath();
+        if ( fileGlobal.Open(m_conv/*ignored in ANSI build*/) )
+        {
+            Parse(fileGlobal, false /* global */);
+            SetRootPath();
+        }
+        else
+        {
+            wxLogWarning(_("can't open global configuration file '%s'."), m_strGlobalFile.c_str());
+        }
     }
-    else
-      wxLogWarning(_("can't open global configuration file '%s'."),
-                   m_strGlobalFile.c_str());
-  }
 
-  // parse the local file
-  if ( !m_strLocalFile.IsEmpty() && wxFile::Exists(m_strLocalFile) ) {
-    wxTextFile fileLocal(m_strLocalFile);
-    if ( fileLocal.Open() ) {
-      Parse(fileLocal, TRUE /* local */);
-      SetRootPath();
+    // parse the local file
+    if ( !m_strLocalFile.empty() && wxFile::Exists(m_strLocalFile) )
+    {
+        wxTextFile fileLocal(m_strLocalFile);
+        if ( fileLocal.Open(m_conv/*ignored in ANSI build*/) )
+        {
+            Parse(fileLocal, true /* local */);
+            SetRootPath();
+        }
+        else
+        {
+            wxLogWarning(_("can't open user configuration file '%s'."),  m_strLocalFile.c_str() );
+        }
     }
-    else
-      wxLogWarning(_("can't open user configuration file '%s'."),
-                   m_strLocalFile.c_str());
-  }
+
+    m_isDirty = false;
 }
 
 // constructor supports creation of wxFileConfig objects of any type
 wxFileConfig::wxFileConfig(const wxString& appName, const wxString& vendorName,
                            const wxString& strLocal, const wxString& strGlobal,
-                           long style)
+                           long style, wxMBConv& conv)
             : wxConfigBase(::GetAppName(appName), vendorName,
                            strLocal, strGlobal,
                            style),
-              m_strLocalFile(strLocal), m_strGlobalFile(strGlobal)
+              m_strLocalFile(strLocal), m_strGlobalFile(strGlobal),
+              m_conv(conv)
 {
-  // Make up names for files if empty
-  if ( m_strLocalFile.IsEmpty() && (style & wxCONFIG_USE_LOCAL_FILE) )
-  {
-    m_strLocalFile = GetLocalFileName(GetAppName());
-  }
+    // Make up names for files if empty
+    if ( m_strLocalFile.empty() && (style & wxCONFIG_USE_LOCAL_FILE) )
+        m_strLocalFile = GetLocalFileName(GetAppName());
 
-  if ( m_strGlobalFile.IsEmpty() && (style & wxCONFIG_USE_GLOBAL_FILE) )
-  {
-    m_strGlobalFile = GetGlobalFileName(GetAppName());
-  }
+    if ( m_strGlobalFile.empty() && (style & wxCONFIG_USE_GLOBAL_FILE) )
+        m_strGlobalFile = GetGlobalFileName(GetAppName());
+
+    // Check if styles are not supplied, but filenames are, in which case
+    // add the correct styles.
+    if ( !m_strLocalFile.empty() )
+        SetStyle(GetStyle() | wxCONFIG_USE_LOCAL_FILE);
+
+    if ( !m_strGlobalFile.empty() )
+        SetStyle(GetStyle() | wxCONFIG_USE_GLOBAL_FILE);
 
-  // Check if styles are not supplied, but filenames are, in which case
-  // add the correct styles.
-  if ( !m_strLocalFile.IsEmpty() )
+    // if the path is not absolute, prepend the standard directory to it
+    // UNLESS wxCONFIG_USE_RELATIVE_PATH style is set
+    if ( !(style & wxCONFIG_USE_RELATIVE_PATH) )
+    {
+        if ( !m_strLocalFile.empty() && !wxIsAbsolutePath(m_strLocalFile) )
+        {
+            const wxString strLocalOrig = m_strLocalFile;
+            m_strLocalFile = GetLocalDir();
+            m_strLocalFile << strLocalOrig;
+        }
+
+        if ( !m_strGlobalFile.empty() && !wxIsAbsolutePath(m_strGlobalFile) )
+        {
+            const wxString strGlobalOrig = m_strGlobalFile;
+            m_strGlobalFile = GetGlobalDir();
+            m_strGlobalFile << strGlobalOrig;
+        }
+    }
+
+    SetUmask(-1);
+
+    Init();
+}
+
+#if wxUSE_STREAMS
+
+wxFileConfig::wxFileConfig(wxInputStream &inStream, wxMBConv& conv)
+            : m_conv(conv)
+{
+    // always local_file when this constructor is called (?)
     SetStyle(GetStyle() | wxCONFIG_USE_LOCAL_FILE);
 
-  if ( !m_strGlobalFile.IsEmpty() )
-    SetStyle(GetStyle() | wxCONFIG_USE_GLOBAL_FILE);
-
-  // if the path is not absolute, prepend the standard directory to it
-  // UNLESS wxCONFIG_USE_RELATIVE_PATH style is set
-  if ( !(style & wxCONFIG_USE_RELATIVE_PATH) ){
-	  if ( !m_strLocalFile.IsEmpty() && !wxIsAbsolutePath(m_strLocalFile) )
-	  {
-		  wxString strLocal = m_strLocalFile;
-		  m_strLocalFile = GetLocalDir();
-		  m_strLocalFile << strLocal;
-	  }
-
-	  if ( !m_strGlobalFile.IsEmpty() && !wxIsAbsolutePath(m_strGlobalFile) )
-	  {
-		  wxString strGlobal = m_strGlobalFile;
-		  m_strGlobalFile = GetGlobalDir();
-		  m_strGlobalFile << strGlobal;
-	  }
-  }
+    m_pCurrentGroup =
+    m_pRootGroup    = new wxFileConfigGroup(NULL, wxEmptyString, this);
 
-  Init();
+    m_linesHead =
+    m_linesTail = NULL;
+
+    // translate everything to the current (platform-dependent) line
+    // termination character
+    wxString strTrans;
+    {
+        wxString strTmp;
+
+        char buf[1024];
+        do
+        {
+            inStream.Read(buf, WXSIZEOF(buf)-1);  // leave room for the NULL
+
+            const wxStreamError err = inStream.GetLastError();
+
+            if ( err != wxSTREAM_NO_ERROR && err != wxSTREAM_EOF )
+            {
+                wxLogError(_("Error reading config options."));
+                break;
+            }
+
+            // FIXME: this is broken because if we have part of multibyte
+            //        character in the buffer (and another part hasn't been
+            //        read yet) we're going to lose data because of conversion
+            //        errors
+            buf[inStream.LastRead()] = '\0';
+            strTmp += conv.cMB2WX(buf);
+        }
+        while ( !inStream.Eof() );
+
+        strTrans = wxTextBuffer::Translate(strTmp);
+    }
+
+    wxMemoryText memText;
+
+    // Now we can add the text to the memory text. To do this we extract line
+    // by line from the translated string, until we've reached the end.
+    //
+    // VZ: all this is horribly inefficient, we should do the translation on
+    //     the fly in one pass saving both memory and time (TODO)
+
+    const wxChar *pEOL = wxTextBuffer::GetEOL(wxTextBuffer::typeDefault);
+    const size_t EOLLen = wxStrlen(pEOL);
+
+    int posLineStart = strTrans.Find(pEOL);
+    while ( posLineStart != -1 )
+    {
+        wxString line(strTrans.Left(posLineStart));
+
+        memText.AddLine(line);
+
+        strTrans = strTrans.Mid(posLineStart + EOLLen);
+
+        posLineStart = strTrans.Find(pEOL);
+    }
+
+    // also add whatever we have left in the translated string.
+    if ( !strTrans.empty() )
+        memText.AddLine(strTrans);
+
+    // Finally we can parse it all.
+    Parse(memText, true /* local */);
+
+    SetRootPath();
+    ResetDirty();
 }
 
+#endif // wxUSE_STREAMS
+
 void wxFileConfig::CleanUp()
 {
-  delete m_pRootGroup;
+    delete m_pRootGroup;
 
-  LineList *pCur = m_linesHead;
-  while ( pCur != NULL ) {
-    LineList *pNext = pCur->Next();
-    delete pCur;
-    pCur = pNext;
-  }
+    wxFileConfigLineList *pCur = m_linesHead;
+    while ( pCur != NULL ) {
+        wxFileConfigLineList *pNext = pCur->Next();
+        delete pCur;
+        pCur = pNext;
+    }
 }
 
 wxFileConfig::~wxFileConfig()
 {
-  Flush();
+    Flush();
 
-  CleanUp();
+    CleanUp();
 }
 
 // ----------------------------------------------------------------------------
 // parse a config file
 // ----------------------------------------------------------------------------
 
-void wxFileConfig::Parse(wxTextFile& file, bool bLocal)
+void wxFileConfig::Parse(const wxTextBuffer& buffer, bool bLocal)
 {
   const wxChar *pStart;
   const wxChar *pEnd;
   wxString strLine;
 
-  size_t nLineCount = file.GetLineCount();
-  for ( size_t n = 0; n < nLineCount; n++ ) {
-    strLine = file[n];
+  size_t nLineCount = buffer.GetLineCount();
+
+  for ( size_t n = 0; n < nLineCount; n++ )
+  {
+    strLine = buffer[n];
 
     // add the line to linked list
     if ( bLocal )
+    {
       LineListAppend(strLine);
 
+      // let the root group have its start line as well
+      if ( !n )
+      {
+        m_pCurrentGroup->SetLine(m_linesTail);
+      }
+    }
+
+
     // skip leading spaces
     for ( pStart = strLine; wxIsspace(*pStart); pStart++ )
       ;
@@ -392,13 +609,20 @@ void wxFileConfig::Parse(wxTextFile& file, bool bLocal)
       pEnd = pStart;
 
       while ( *++pEnd != wxT(']') ) {
-        if ( *pEnd == wxT('\n') || *pEnd == wxT('\0') )
+        if ( *pEnd == wxT('\\') ) {
+            // the next char is escaped, so skip it even if it is ']'
+            pEnd++;
+        }
+
+        if ( *pEnd == wxT('\n') || *pEnd == wxT('\0') ) {
+            // we reached the end of line, break out of the loop
             break;
+        }
       }
 
       if ( *pEnd != wxT(']') ) {
         wxLogError(_("file '%s': unexpected character %c at line %d."),
-                   file.GetName(), *pEnd, n + 1);
+                   buffer.GetName(), *pEnd, n + 1);
         continue; // skip this line
       }
 
@@ -412,15 +636,19 @@ void wxFileConfig::Parse(wxTextFile& file, bool bLocal)
       SetPath(strGroup);
 
       if ( bLocal )
+      {
+        if ( m_pCurrentGroup->Parent() )
+          m_pCurrentGroup->Parent()->SetLastGroup(m_pCurrentGroup);
         m_pCurrentGroup->SetLine(m_linesTail);
+      }
 
       // check that there is nothing except comments left on this line
-      bool bCont = TRUE;
+      bool bCont = true;
       while ( *++pEnd != wxT('\0') && bCont ) {
         switch ( *pEnd ) {
           case wxT('#'):
           case wxT(';'):
-            bCont = FALSE;
+            bCont = false;
             break;
 
           case wxT(' '):
@@ -429,51 +657,50 @@ void wxFileConfig::Parse(wxTextFile& file, bool bLocal)
             break;
 
           default:
-            wxLogWarning(_("file '%s', line %d: '%s' "
-                           "ignored after group header."),
-                         file.GetName(), n + 1, pEnd);
-            bCont = FALSE;
+            wxLogWarning(_("file '%s', line %d: '%s' ignored after group header."),
+                         buffer.GetName(), n + 1, pEnd);
+            bCont = false;
         }
       }
     }
     else {                        // a key
-      const wxChar *pEnd = pStart;
-      while ( *pEnd != wxT('=') && !wxIsspace(*pEnd) ) {
+      pEnd = pStart;
+      while ( *pEnd && *pEnd != wxT('=') /* && !wxIsspace(*pEnd)*/ ) {
         if ( *pEnd == wxT('\\') ) {
           // next character may be space or not - still take it because it's
-          // quoted
+          // quoted (unless there is nothing)
           pEnd++;
+          if ( !*pEnd ) {
+            // the error message will be given below anyhow
+            break;
+          }
         }
 
         pEnd++;
       }
 
-      wxString strKey(FilterInEntryName(wxString(pStart, pEnd)));
+      wxString strKey(FilterInEntryName(wxString(pStart, pEnd).Trim()));
 
       // skip whitespace
-      while ( isspace(*pEnd) )
+      while ( wxIsspace(*pEnd) )
         pEnd++;
 
       if ( *pEnd++ != wxT('=') ) {
         wxLogError(_("file '%s', line %d: '=' expected."),
-                   file.GetName(), n + 1);
+                   buffer.GetName(), n + 1);
       }
       else {
-        ConfigEntry *pEntry = m_pCurrentGroup->FindEntry(strKey);
+        wxFileConfigEntry *pEntry = m_pCurrentGroup->FindEntry(strKey);
 
         if ( pEntry == NULL ) {
           // new entry
           pEntry = m_pCurrentGroup->AddEntry(strKey, n);
-
-          if ( bLocal )
-            pEntry->SetLine(m_linesTail);
         }
         else {
           if ( bLocal && pEntry->IsImmutable() ) {
             // immutable keys can't be changed by user
-            wxLogWarning(_("file '%s', line %d: value for "
-                           "immutable key '%s' ignored."),
-                         file.GetName(), n + 1, strKey.c_str());
+            wxLogWarning(_("file '%s', line %d: value for immutable key '%s' ignored."),
+                         buffer.GetName(), n + 1, strKey.c_str());
             continue;
           }
           // the condition below catches the cases (a) and (b) but not (c):
@@ -482,20 +709,24 @@ void wxFileConfig::Parse(wxTextFile& file, bool bLocal)
           //  (c) key from global file now found in local one
           // which is exactly what we want.
           else if ( !bLocal || pEntry->IsLocal() ) {
-            wxLogWarning(_("file '%s', line %d: key '%s' was first "
-                           "found at line %d."),
-                         file.GetName(), n + 1, strKey.c_str(), pEntry->Line());
+            wxLogWarning(_("file '%s', line %d: key '%s' was first found at line %d."),
+                         buffer.GetName(), n + 1, strKey.c_str(), pEntry->Line());
 
-            if ( bLocal )
-              pEntry->SetLine(m_linesTail);
           }
         }
 
+        if ( bLocal )
+          pEntry->SetLine(m_linesTail);
+
         // skip whitespace
         while ( wxIsspace(*pEnd) )
           pEnd++;
 
-        pEntry->SetValue(FilterInValue(pEnd), FALSE /* read from file */);
+        wxString value = pEnd;
+        if ( !(GetStyle() & wxCONFIG_USE_NO_ESCAPE_CHARACTERS) )
+            value = FilterInValue(value);
+
+        pEntry->SetValue(value, false);
       }
     }
   }
@@ -507,45 +738,59 @@ void wxFileConfig::Parse(wxTextFile& file, bool bLocal)
 
 void wxFileConfig::SetRootPath()
 {
-  m_strPath.Empty();
-  m_pCurrentGroup = m_pRootGroup;
+    m_strPath.Empty();
+    m_pCurrentGroup = m_pRootGroup;
 }
 
-void wxFileConfig::SetPath(const wxString& strPath)
+bool
+wxFileConfig::DoSetPath(const wxString& strPath, bool createMissingComponents)
 {
-  wxArrayString aParts;
+    wxArrayString aParts;
 
-  if ( strPath.IsEmpty() ) {
-    SetRootPath();
-    return;
-  }
+    if ( strPath.empty() ) {
+        SetRootPath();
+        return true;
+    }
 
-  if ( strPath[0] == wxCONFIG_PATH_SEPARATOR ) {
-    // absolute path
-    wxSplitPath(aParts, strPath);
-  }
-  else {
-    // relative path, combine with current one
-    wxString strFullPath = m_strPath;
-    strFullPath << wxCONFIG_PATH_SEPARATOR << strPath;
-    wxSplitPath(aParts, strFullPath);
-  }
+    if ( strPath[0] == wxCONFIG_PATH_SEPARATOR ) {
+        // absolute path
+        wxSplitPath(aParts, strPath);
+    }
+    else {
+        // relative path, combine with current one
+        wxString strFullPath = m_strPath;
+        strFullPath << wxCONFIG_PATH_SEPARATOR << strPath;
+        wxSplitPath(aParts, strFullPath);
+    }
 
-  // change current group
-  size_t n;
-  m_pCurrentGroup = m_pRootGroup;
-  for ( n = 0; n < aParts.Count(); n++ ) {
-    ConfigGroup *pNextGroup = m_pCurrentGroup->FindSubgroup(aParts[n]);
-    if ( pNextGroup == NULL )
-      pNextGroup = m_pCurrentGroup->AddSubgroup(aParts[n]);
-    m_pCurrentGroup = pNextGroup;
-  }
+    // change current group
+    size_t n;
+    m_pCurrentGroup = m_pRootGroup;
+    for ( n = 0; n < aParts.Count(); n++ ) {
+        wxFileConfigGroup *pNextGroup = m_pCurrentGroup->FindSubgroup(aParts[n]);
+        if ( pNextGroup == NULL )
+        {
+            if ( !createMissingComponents )
+                return false;
 
-  // recombine path parts in one variable
-  m_strPath.Empty();
-  for ( n = 0; n < aParts.Count(); n++ ) {
-    m_strPath << wxCONFIG_PATH_SEPARATOR << aParts[n];
-  }
+            pNextGroup = m_pCurrentGroup->AddSubgroup(aParts[n]);
+        }
+
+        m_pCurrentGroup = pNextGroup;
+    }
+
+    // recombine path parts in one variable
+    m_strPath.Empty();
+    for ( n = 0; n < aParts.Count(); n++ ) {
+        m_strPath << wxCONFIG_PATH_SEPARATOR << aParts[n];
+    }
+
+    return true;
+}
+
+void wxFileConfig::SetPath(const wxString& strPath)
+{
+    DoSetPath(strPath, true /* create missing path components */);
 }
 
 // ----------------------------------------------------------------------------
@@ -554,66 +799,66 @@ void wxFileConfig::SetPath(const wxString& strPath)
 
 bool wxFileConfig::GetFirstGroup(wxString& str, long& lIndex) const
 {
-  lIndex = 0;
-  return GetNextGroup(str, lIndex);
+    lIndex = 0;
+    return GetNextGroup(str, lIndex);
 }
 
 bool wxFileConfig::GetNextGroup (wxString& str, long& lIndex) const
 {
-  if ( size_t(lIndex) < m_pCurrentGroup->Groups().Count() ) {
-    str = m_pCurrentGroup->Groups()[lIndex++]->Name();
-    return TRUE;
-  }
-  else
-    return FALSE;
+    if ( size_t(lIndex) < m_pCurrentGroup->Groups().Count() ) {
+        str = m_pCurrentGroup->Groups()[(size_t)lIndex++]->Name();
+        return true;
+    }
+    else
+        return false;
 }
 
 bool wxFileConfig::GetFirstEntry(wxString& str, long& lIndex) const
 {
-  lIndex = 0;
-  return GetNextEntry(str, lIndex);
+    lIndex = 0;
+    return GetNextEntry(str, lIndex);
 }
 
 bool wxFileConfig::GetNextEntry (wxString& str, long& lIndex) const
 {
-  if ( size_t(lIndex) < m_pCurrentGroup->Entries().Count() ) {
-    str = m_pCurrentGroup->Entries()[lIndex++]->Name();
-    return TRUE;
-  }
-  else
-    return FALSE;
+    if ( size_t(lIndex) < m_pCurrentGroup->Entries().Count() ) {
+        str = m_pCurrentGroup->Entries()[(size_t)lIndex++]->Name();
+        return true;
+    }
+    else
+        return false;
 }
 
 size_t wxFileConfig::GetNumberOfEntries(bool bRecursive) const
 {
-  size_t n = m_pCurrentGroup->Entries().Count();
-  if ( bRecursive ) {
-    ConfigGroup *pOldCurrentGroup = m_pCurrentGroup;
-    size_t nSubgroups = m_pCurrentGroup->Groups().Count();
-    for ( size_t nGroup = 0; nGroup < nSubgroups; nGroup++ ) {
-      CONST_CAST m_pCurrentGroup = m_pCurrentGroup->Groups()[nGroup];
-      n += GetNumberOfEntries(TRUE);
-      CONST_CAST m_pCurrentGroup = pOldCurrentGroup;
+    size_t n = m_pCurrentGroup->Entries().Count();
+    if ( bRecursive ) {
+        wxFileConfigGroup *pOldCurrentGroup = m_pCurrentGroup;
+        size_t nSubgroups = m_pCurrentGroup->Groups().Count();
+        for ( size_t nGroup = 0; nGroup < nSubgroups; nGroup++ ) {
+            CONST_CAST m_pCurrentGroup = m_pCurrentGroup->Groups()[nGroup];
+            n += GetNumberOfEntries(true);
+            CONST_CAST m_pCurrentGroup = pOldCurrentGroup;
+        }
     }
-  }
 
-  return n;
+    return n;
 }
 
 size_t wxFileConfig::GetNumberOfGroups(bool bRecursive) const
 {
-  size_t n = m_pCurrentGroup->Groups().Count();
-  if ( bRecursive ) {
-    ConfigGroup *pOldCurrentGroup = m_pCurrentGroup;
-    size_t nSubgroups = m_pCurrentGroup->Groups().Count();
-    for ( size_t nGroup = 0; nGroup < nSubgroups; nGroup++ ) {
-      CONST_CAST m_pCurrentGroup = m_pCurrentGroup->Groups()[nGroup];
-      n += GetNumberOfGroups(TRUE);
-      CONST_CAST m_pCurrentGroup = pOldCurrentGroup;
+    size_t n = m_pCurrentGroup->Groups().Count();
+    if ( bRecursive ) {
+        wxFileConfigGroup *pOldCurrentGroup = m_pCurrentGroup;
+        size_t nSubgroups = m_pCurrentGroup->Groups().Count();
+        for ( size_t nGroup = 0; nGroup < nSubgroups; nGroup++ ) {
+            CONST_CAST m_pCurrentGroup = m_pCurrentGroup->Groups()[nGroup];
+            n += GetNumberOfGroups(true);
+            CONST_CAST m_pCurrentGroup = pOldCurrentGroup;
+        }
     }
-  }
 
-  return n;
+    return n;
 }
 
 // ----------------------------------------------------------------------------
@@ -622,135 +867,195 @@ size_t wxFileConfig::GetNumberOfGroups(bool bRecursive) const
 
 bool wxFileConfig::HasGroup(const wxString& strName) const
 {
-  wxConfigPathChanger path(this, strName);
+    // special case: DoSetPath("") does work as it's equivalent to DoSetPath("/")
+    // but there is no group with empty name so treat this separately
+    if ( strName.empty() )
+        return false;
 
-  ConfigGroup *pGroup = m_pCurrentGroup->FindSubgroup(path.Name());
-  return pGroup != NULL;
+    const wxString pathOld = GetPath();
+
+    wxFileConfig *self = wx_const_cast(wxFileConfig *, this);
+    const bool
+        rc = self->DoSetPath(strName, false /* don't create missing components */);
+
+    self->SetPath(pathOld);
+
+    return rc;
 }
 
 bool wxFileConfig::HasEntry(const wxString& strName) const
 {
-  wxConfigPathChanger path(this, strName);
+    wxConfigPathChanger path(this, strName);
 
-  ConfigEntry *pEntry = m_pCurrentGroup->FindEntry(path.Name());
-  return pEntry != NULL;
+    wxFileConfigEntry *pEntry = m_pCurrentGroup->FindEntry(path.Name());
+    return pEntry != NULL;
 }
 
 // ----------------------------------------------------------------------------
 // read/write values
 // ----------------------------------------------------------------------------
 
-bool wxFileConfig::Read(const wxString& key,
-                        wxString* pStr) const
+bool wxFileConfig::DoReadString(const wxString& key, wxString* pStr) const
 {
-  wxConfigPathChanger path(this, key);
+    wxConfigPathChanger path(this, key);
 
-  ConfigEntry *pEntry = m_pCurrentGroup->FindEntry(path.Name());
-  if (pEntry == NULL) {
-    return FALSE;
-  }
-  else {
-    *pStr = ExpandEnvVars(pEntry->Value());
-    return TRUE;
-  }
-}
+    wxFileConfigEntry *pEntry = m_pCurrentGroup->FindEntry(path.Name());
+    if (pEntry == NULL) {
+        return false;
+    }
 
-bool wxFileConfig::Read(const wxString& key,
-                        wxString* pStr, const wxString& defVal) const
-{
-  wxConfigPathChanger path(this, key);
+    *pStr = pEntry->Value();
 
-  ConfigEntry *pEntry = m_pCurrentGroup->FindEntry(path.Name());
-  if (pEntry == NULL) {
-    if( IsRecordingDefaults() )
-      ((wxFileConfig *)this)->Write(key,defVal);
-    *pStr = ExpandEnvVars(defVal);
-    return FALSE;
-  }
-  else {
-    *pStr = ExpandEnvVars(pEntry->Value());
-    return TRUE;
-  }
+    return true;
 }
 
-bool wxFileConfig::Read(const wxString& key, long *pl) const
+bool wxFileConfig::DoReadLong(const wxString& key, long *pl) const
 {
-  wxString str;
-  if ( Read(key, & str) ) {
-    *pl = wxAtol(str);
-    return TRUE;
-  }
-  else {
-    return FALSE;
-  }
+    wxString str;
+    if ( !Read(key, &str) )
+        return false;
+
+    // extra spaces shouldn't prevent us from reading numeric values
+    str.Trim();
+
+    return str.ToLong(pl);
 }
 
-bool wxFileConfig::Write(const wxString& key, const wxString& szValue)
+bool wxFileConfig::DoWriteString(const wxString& key, const wxString& szValue)
 {
-  wxConfigPathChanger path(this, key);
+    wxConfigPathChanger     path(this, key);
+    wxString                strName = path.Name();
+
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("  Writing String '%s' = '%s' to Group '%s'"),
+                strName.c_str(),
+                szValue.c_str(),
+                GetPath().c_str() );
 
-  wxString strName = path.Name();
-  if ( strName.IsEmpty() ) {
-    // setting the value of a group is an error
-    wxASSERT_MSG( wxIsEmpty(szValue), wxT("can't set value of a group!") );
+    if ( strName.empty() )
+    {
+            // setting the value of a group is an error
 
-    // ... except if it's empty in which case it's a way to force it's creation
-    m_pCurrentGroup->SetDirty();
+        wxASSERT_MSG( szValue.empty(), wxT("can't set value of a group!") );
 
-    // this will add a line for this group if it didn't have it before
-    (void)m_pCurrentGroup->GetGroupLine();
-  }
-  else {
-    // writing an entry
-
-    // check that the name is reasonable
-    if ( strName[0u] == wxCONFIG_IMMUTABLE_PREFIX ) {
-      wxLogError(_("Config entry name cannot start with '%c'."),
-                 wxCONFIG_IMMUTABLE_PREFIX);
-      return FALSE;
+            // ... except if it's empty in which case it's a way to force it's creation
+
+        wxLogTrace( FILECONF_TRACE_MASK,
+                    _T("  Creating group %s"),
+                    m_pCurrentGroup->Name().c_str() );
+
+        SetDirty();
+
+            // this will add a line for this group if it didn't have it before
+
+        (void)m_pCurrentGroup->GetGroupLine();
     }
+    else
+    {
+        // writing an entry check that the name is reasonable
+        if ( strName[0u] == wxCONFIG_IMMUTABLE_PREFIX )
+        {
+            wxLogError( _("Config entry name cannot start with '%c'."),
+                        wxCONFIG_IMMUTABLE_PREFIX);
+            return false;
+        }
 
-    ConfigEntry *pEntry = m_pCurrentGroup->FindEntry(strName);
-    if ( pEntry == NULL )
-      pEntry = m_pCurrentGroup->AddEntry(strName);
+        wxFileConfigEntry   *pEntry = m_pCurrentGroup->FindEntry(strName);
 
-    pEntry->SetValue(szValue);
-  }
+        if ( pEntry == 0 )
+        {
+            wxLogTrace( FILECONF_TRACE_MASK,
+                        _T("  Adding Entry %s"),
+                        strName.c_str() );
+            pEntry = m_pCurrentGroup->AddEntry(strName);
+        }
+
+        wxLogTrace( FILECONF_TRACE_MASK,
+                    _T("  Setting value %s"),
+                    szValue.c_str() );
+        pEntry->SetValue(szValue);
+
+        SetDirty();
+    }
 
-  return TRUE;
+    return true;
 }
 
-bool wxFileConfig::Write(const wxString& key, long lValue)
+bool wxFileConfig::DoWriteLong(const wxString& key, long lValue)
 {
-  // ltoa() is not ANSI :-(
-  wxString buf;
-  buf.Printf(wxT("%ld"), lValue);
-  return Write(key, buf);
+  return Write(key, wxString::Format(_T("%ld"), lValue));
 }
 
 bool wxFileConfig::Flush(bool /* bCurrentOnly */)
 {
-  if ( LineListIsEmpty() || !m_pRootGroup->IsDirty() )
-    return TRUE;
+  if ( !IsDirty() || !m_strLocalFile )
+    return true;
+
+  // set the umask if needed
+  wxCHANGE_UMASK(m_umask);
 
   wxTempFile file(m_strLocalFile);
 
-  if ( !file.IsOpened() ) {
+  if ( !file.IsOpened() )
+  {
     wxLogError(_("can't open user configuration file."));
-    return FALSE;
+    return false;
   }
 
   // write all strings to file
-  for ( LineList *p = m_linesHead; p != NULL; p = p->Next() ) {
-    if ( !file.Write(p->Text() + wxTextFile::GetEOL()) ) {
+  for ( wxFileConfigLineList *p = m_linesHead; p != NULL; p = p->Next() )
+  {
+    wxString line = p->Text();
+    line += wxTextFile::GetEOL();
+    if ( !file.Write(line, m_conv) )
+    {
       wxLogError(_("can't write user configuration file."));
-      return FALSE;
+      return false;
     }
   }
 
-  return file.Commit();
+  if ( !file.Commit() )
+  {
+      wxLogError(_("Failed to update user configuration file."));
+
+      return false;
+  }
+
+  ResetDirty();
+
+#if defined(__WXMAC__)
+  wxFileName(m_strLocalFile).MacSetTypeAndCreator('TEXT', 'ttxt');
+#endif // __WXMAC__
+
+  return true;
+}
+
+#if wxUSE_STREAMS
+
+bool wxFileConfig::Save(wxOutputStream& os, wxMBConv& conv)
+{
+    // save unconditionally, even if not dirty
+    for ( wxFileConfigLineList *p = m_linesHead; p != NULL; p = p->Next() )
+    {
+        wxString line = p->Text();
+        line += wxTextFile::GetEOL();
+
+        wxCharBuffer buf(line.mb_str(conv));
+        if ( !os.Write(buf, strlen(buf)) )
+        {
+            wxLogError(_("Error saving user configuration data."));
+
+            return false;
+        }
+    }
+
+    ResetDirty();
+
+    return true;
 }
 
+#endif // wxUSE_STREAMS
+
 // ----------------------------------------------------------------------------
 // renaming groups/entries
 // ----------------------------------------------------------------------------
@@ -758,41 +1063,48 @@ bool wxFileConfig::Flush(bool /* bCurrentOnly */)
 bool wxFileConfig::RenameEntry(const wxString& oldName,
                                const wxString& newName)
 {
+    wxASSERT_MSG( !wxStrchr(oldName, wxCONFIG_PATH_SEPARATOR),
+                   _T("RenameEntry(): paths are not supported") );
+
     // check that the entry exists
-    ConfigEntry *oldEntry = m_pCurrentGroup->FindEntry(oldName);
+    wxFileConfigEntry *oldEntry = m_pCurrentGroup->FindEntry(oldName);
     if ( !oldEntry )
-        return FALSE;
+        return false;
 
     // check that the new entry doesn't already exist
     if ( m_pCurrentGroup->FindEntry(newName) )
-        return FALSE;
+        return false;
 
     // delete the old entry, create the new one
     wxString value = oldEntry->Value();
     if ( !m_pCurrentGroup->DeleteEntry(oldName) )
-        return FALSE;
+        return false;
+
+    SetDirty();
 
-    ConfigEntry *newEntry = m_pCurrentGroup->AddEntry(newName);
+    wxFileConfigEntry *newEntry = m_pCurrentGroup->AddEntry(newName);
     newEntry->SetValue(value);
 
-    return TRUE;
+    return true;
 }
 
 bool wxFileConfig::RenameGroup(const wxString& oldName,
                                const wxString& newName)
 {
     // check that the group exists
-    ConfigGroup *group = m_pCurrentGroup->FindSubgroup(oldName);
+    wxFileConfigGroup *group = m_pCurrentGroup->FindSubgroup(oldName);
     if ( !group )
-        return FALSE;
+        return false;
 
     // check that the new group doesn't already exist
     if ( m_pCurrentGroup->FindSubgroup(newName) )
-        return FALSE;
+        return false;
 
     group->Rename(newName);
 
-    return TRUE;
+    SetDirty();
+
+    return true;
 }
 
 // ----------------------------------------------------------------------------
@@ -804,116 +1116,195 @@ bool wxFileConfig::DeleteEntry(const wxString& key, bool bGroupIfEmptyAlso)
   wxConfigPathChanger path(this, key);
 
   if ( !m_pCurrentGroup->DeleteEntry(path.Name()) )
-    return FALSE;
+    return false;
+
+  SetDirty();
 
   if ( bGroupIfEmptyAlso && m_pCurrentGroup->IsEmpty() ) {
     if ( m_pCurrentGroup != m_pRootGroup ) {
-      ConfigGroup *pGroup = m_pCurrentGroup;
+      wxFileConfigGroup *pGroup = m_pCurrentGroup;
       SetPath(wxT(".."));  // changes m_pCurrentGroup!
       m_pCurrentGroup->DeleteSubgroupByName(pGroup->Name());
     }
     //else: never delete the root group
   }
 
-  return TRUE;
+  return true;
 }
 
 bool wxFileConfig::DeleteGroup(const wxString& key)
 {
   wxConfigPathChanger path(this, key);
 
-  return m_pCurrentGroup->DeleteSubgroupByName(path.Name());
+  if ( !m_pCurrentGroup->DeleteSubgroupByName(path.Name()) )
+      return false;
+
+  SetDirty();
+
+  return true;
 }
 
 bool wxFileConfig::DeleteAll()
 {
   CleanUp();
 
-  if ( remove(m_strLocalFile.fn_str()) == -1 )
-    wxLogSysError(_("can't delete user configuration file '%s'"), m_strLocalFile.c_str());
+  if ( !m_strLocalFile.empty() )
+  {
+      if ( wxFile::Exists(m_strLocalFile) && wxRemove(m_strLocalFile) == -1 )
+      {
+          wxLogSysError(_("can't delete user configuration file '%s'"),
+                        m_strLocalFile.c_str());
+          return false;
+      }
+
+      m_strLocalFile =
+      m_strGlobalFile = wxEmptyString;
+  }
 
-  m_strLocalFile = m_strGlobalFile = wxT("");
   Init();
 
-  return TRUE;
+  return true;
 }
 
 // ----------------------------------------------------------------------------
 // linked list functions
 // ----------------------------------------------------------------------------
 
-// append a new line to the end of the list
-LineList *wxFileConfig::LineListAppend(const wxString& str)
+    // append a new line to the end of the list
+
+wxFileConfigLineList *wxFileConfig::LineListAppend(const wxString& str)
 {
-  LineList *pLine = new LineList(str);
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("    ** Adding Line '%s'"),
+                str.c_str() );
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("        head: %s"),
+                ((m_linesHead) ? m_linesHead->Text().c_str() : wxEmptyString) );
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("        tail: %s"),
+                ((m_linesTail) ? m_linesTail->Text().c_str() : wxEmptyString) );
+
+    wxFileConfigLineList *pLine = new wxFileConfigLineList(str);
+
+    if ( m_linesTail == NULL )
+    {
+        // list is empty
+        m_linesHead = pLine;
+    }
+    else
+    {
+        // adjust pointers
+        m_linesTail->SetNext(pLine);
+        pLine->SetPrev(m_linesTail);
+    }
 
-  if ( m_linesTail == NULL ) {
-    // list is empty
-    m_linesHead = pLine;
-  }
-  else {
-    // adjust pointers
-    m_linesTail->SetNext(pLine);
-    pLine->SetPrev(m_linesTail);
-  }
+    m_linesTail = pLine;
+
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("        head: %s"),
+                ((m_linesHead) ? m_linesHead->Text().c_str() : wxEmptyString) );
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("        tail: %s"),
+                ((m_linesTail) ? m_linesTail->Text().c_str() : wxEmptyString) );
 
-  m_linesTail = pLine;
-  return m_linesTail;
+    return m_linesTail;
 }
 
 // insert a new line after the given one or in the very beginning if !pLine
-LineList *wxFileConfig::LineListInsert(const wxString& str,
-                                                     LineList *pLine)
-{
-  if ( pLine == m_linesTail )
-    return LineListAppend(str);
-
-  LineList *pNewLine = new LineList(str);
-  if ( pLine == NULL ) {
-    // prepend to the list
-    pNewLine->SetNext(m_linesHead);
-    m_linesHead->SetPrev(pNewLine);
-    m_linesHead = pNewLine;
-  }
-  else {
-    // insert before pLine
-    LineList *pNext = pLine->Next();
-    pNewLine->SetNext(pNext);
-    pNewLine->SetPrev(pLine);
-    pNext->SetPrev(pNewLine);
-    pLine->SetNext(pNewLine);
-  }
+wxFileConfigLineList *wxFileConfig::LineListInsert(const wxString& str,
+                                                   wxFileConfigLineList *pLine)
+{
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("    ** Inserting Line '%s' after '%s'"),
+                str.c_str(),
+                ((pLine) ? pLine->Text().c_str() : wxEmptyString) );
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("        head: %s"),
+                ((m_linesHead) ? m_linesHead->Text().c_str() : wxEmptyString) );
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("        tail: %s"),
+                ((m_linesTail) ? m_linesTail->Text().c_str() : wxEmptyString) );
+
+    if ( pLine == m_linesTail )
+        return LineListAppend(str);
+
+    wxFileConfigLineList *pNewLine = new wxFileConfigLineList(str);
+    if ( pLine == NULL )
+    {
+        // prepend to the list
+        pNewLine->SetNext(m_linesHead);
+        m_linesHead->SetPrev(pNewLine);
+        m_linesHead = pNewLine;
+    }
+    else
+    {
+        // insert before pLine
+        wxFileConfigLineList *pNext = pLine->Next();
+        pNewLine->SetNext(pNext);
+        pNewLine->SetPrev(pLine);
+        pNext->SetPrev(pNewLine);
+        pLine->SetNext(pNewLine);
+    }
+
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("        head: %s"),
+                ((m_linesHead) ? m_linesHead->Text().c_str() : wxEmptyString) );
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("        tail: %s"),
+                ((m_linesTail) ? m_linesTail->Text().c_str() : wxEmptyString) );
 
-  return pNewLine;
+    return pNewLine;
 }
 
-void wxFileConfig::LineListRemove(LineList *pLine)
+void wxFileConfig::LineListRemove(wxFileConfigLineList *pLine)
 {
-  LineList *pPrev = pLine->Prev(),
-           *pNext = pLine->Next();
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("    ** Removing Line '%s'"),
+                pLine->Text().c_str() );
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("        head: %s"),
+                ((m_linesHead) ? m_linesHead->Text().c_str() : wxEmptyString) );
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("        tail: %s"),
+                ((m_linesTail) ? m_linesTail->Text().c_str() : wxEmptyString) );
+
+    wxFileConfigLineList    *pPrev = pLine->Prev(),
+                            *pNext = pLine->Next();
+
+        // first entry?
+
+    if ( pPrev == NULL )
+        m_linesHead = pNext;
+    else
+        pPrev->SetNext(pNext);
 
-  // first entry?
-  if ( pPrev == NULL )
-    m_linesHead = pNext;
-  else
-    pPrev->SetNext(pNext);
+        // last entry?
 
-  // last entry?
-  if ( pNext == NULL )
-    m_linesTail = pPrev;
-  else
-    pNext->SetPrev(pPrev);
+    if ( pNext == NULL )
+        m_linesTail = pPrev;
+    else
+        pNext->SetPrev(pPrev);
+
+    if ( m_pRootGroup->GetGroupLine() == pLine )
+        m_pRootGroup->SetLine(m_linesHead);
+
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("        head: %s"),
+                ((m_linesHead) ? m_linesHead->Text().c_str() : wxEmptyString) );
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("        tail: %s"),
+                ((m_linesTail) ? m_linesTail->Text().c_str() : wxEmptyString) );
 
-  delete pLine;
+    delete pLine;
 }
 
 bool wxFileConfig::LineListIsEmpty()
 {
-  return m_linesHead == NULL;
+    return m_linesHead == NULL;
 }
 
 // ============================================================================
-// wxFileConfig::ConfigGroup
+// wxFileConfig::wxFileConfigGroup
 // ============================================================================
 
 // ----------------------------------------------------------------------------
@@ -921,7 +1312,7 @@ bool wxFileConfig::LineListIsEmpty()
 // ----------------------------------------------------------------------------
 
 // ctor
-ConfigGroup::ConfigGroup(ConfigGroup *pParent,
+wxFileConfigGroup::wxFileConfigGroup(wxFileConfigGroup *pParent,
                                        const wxString& strName,
                                        wxFileConfig *pConfig)
                          : m_aEntries(CompareEntries),
@@ -930,7 +1321,6 @@ ConfigGroup::ConfigGroup(ConfigGroup *pParent,
 {
   m_pConfig = pConfig;
   m_pParent = pParent;
-  m_bDirty  = FALSE;
   m_pLine   = NULL;
 
   m_pLastEntry = NULL;
@@ -938,7 +1328,7 @@ ConfigGroup::ConfigGroup(ConfigGroup *pParent,
 }
 
 // dtor deletes all children
-ConfigGroup::~ConfigGroup()
+wxFileConfigGroup::~wxFileConfigGroup()
 {
   // entries
   size_t n, nCount = m_aEntries.Count();
@@ -955,11 +1345,14 @@ ConfigGroup::~ConfigGroup()
 // line
 // ----------------------------------------------------------------------------
 
-void ConfigGroup::SetLine(LineList *pLine)
+void wxFileConfigGroup::SetLine(wxFileConfigLineList *pLine)
 {
-  wxASSERT( m_pLine == NULL ); // shouldn't be called twice
+    // for a normal (i.e. not root) group this method shouldn't be called twice
+    // unless we are resetting the line
+    wxASSERT_MSG( !m_pParent || !m_pLine || !pLine,
+                   _T("changing line for a non-root group?") );
 
-  m_pLine = pLine;
+    m_pLine = pLine;
 }
 
 /*
@@ -996,87 +1389,140 @@ void ConfigGroup::SetLine(LineList *pLine)
 // Return the line which contains "[our name]". If we're still not in the list,
 // add our line to it immediately after the last line of our parent group if we
 // have it or in the very beginning if we're the root group.
-LineList *ConfigGroup::GetGroupLine()
-{
-  if ( m_pLine == NULL ) {
-    ConfigGroup *pParent = Parent();
-
-    // this group wasn't present in local config file, add it now
-    if ( pParent != NULL ) {
-      wxString strFullName;
-      strFullName << wxT("[")
-                  // +1: no '/'
-                  << FilterOutEntryName(GetFullName().c_str() + 1)
-                  << wxT("]");
-      m_pLine = m_pConfig->LineListInsert(strFullName,
-                                          pParent->GetLastGroupLine());
-      pParent->SetLastGroup(this);  // we're surely after all the others
-    }
-    else {
-      // we return NULL, so that LineListInsert() will insert us in the
-      // very beginning
+wxFileConfigLineList *wxFileConfigGroup::GetGroupLine()
+{
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("  GetGroupLine() for Group '%s'"),
+                Name().c_str() );
+
+    if ( !m_pLine )
+    {
+        wxLogTrace( FILECONF_TRACE_MASK,
+                    _T("    Getting Line item pointer") );
+
+        wxFileConfigGroup   *pParent = Parent();
+
+        // this group wasn't present in local config file, add it now
+        if ( pParent )
+        {
+            wxLogTrace( FILECONF_TRACE_MASK,
+                        _T("    checking parent '%s'"),
+                        pParent->Name().c_str() );
+
+            wxString    strFullName;
+
+            // add 1 to the name because we don't want to start with '/'
+            strFullName << wxT("[")
+                        << FilterOutEntryName(GetFullName().c_str() + 1)
+                        << wxT("]");
+            m_pLine = m_pConfig->LineListInsert(strFullName,
+                                                pParent->GetLastGroupLine());
+            pParent->SetLastGroup(this);  // we're surely after all the others
+        }
+        //else: this is the root group and so we return NULL because we don't
+        //      have any group line
     }
-  }
 
-  return m_pLine;
+    return m_pLine;
 }
 
 // Return the last line belonging to the subgroups of this group (after which
 // we can add a new subgroup), if we don't have any subgroups or entries our
 // last line is the group line (m_pLine) itself.
-LineList *ConfigGroup::GetLastGroupLine()
+wxFileConfigLineList *wxFileConfigGroup::GetLastGroupLine()
 {
-  // if we have any subgroups, our last line is the last line of the last
-  // subgroup
-  if ( m_pLastGroup != NULL ) {
-    LineList *pLine = m_pLastGroup->GetLastGroupLine();
+    // if we have any subgroups, our last line is the last line of the last
+    // subgroup
+    if ( m_pLastGroup )
+    {
+        wxFileConfigLineList *pLine = m_pLastGroup->GetLastGroupLine();
 
-    wxASSERT( pLine != NULL );  // last group must have !NULL associated line
-    return pLine;
-  }
+        wxASSERT_MSG( pLine, _T("last group must have !NULL associated line") );
+
+        return pLine;
+    }
 
-  // no subgroups, so the last line is the line of thelast entry (if any)
-  return GetLastEntryLine();
+    // no subgroups, so the last line is the line of thelast entry (if any)
+    return GetLastEntryLine();
 }
 
 // return the last line belonging to the entries of this group (after which
 // we can add a new entry), if we don't have any entries we will add the new
 // one immediately after the group line itself.
-LineList *ConfigGroup::GetLastEntryLine()
+wxFileConfigLineList *wxFileConfigGroup::GetLastEntryLine()
 {
-  if ( m_pLastEntry != NULL ) {
-    LineList *pLine = m_pLastEntry->GetLine();
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("  GetLastEntryLine() for Group '%s'"),
+                Name().c_str() );
 
-    wxASSERT( pLine != NULL );  // last entry must have !NULL associated line
-    return pLine;
-  }
+    if ( m_pLastEntry )
+    {
+        wxFileConfigLineList    *pLine = m_pLastEntry->GetLine();
+
+        wxASSERT_MSG( pLine, _T("last entry must have !NULL associated line") );
+
+        return pLine;
+    }
+
+    // no entries: insert after the group header, if any
+    return GetGroupLine();
+}
+
+void wxFileConfigGroup::SetLastEntry(wxFileConfigEntry *pEntry)
+{
+    m_pLastEntry = pEntry;
 
-  // no entries: insert after the group header
-  return GetGroupLine();
+    if ( !m_pLine )
+    {
+        // the only situation in which a group without its own line can have
+        // an entry is when the first entry is added to the initially empty
+        // root pseudo-group
+        wxASSERT_MSG( !m_pParent, _T("unexpected for non root group") );
+
+        // let the group know that it does have a line in the file now
+        m_pLine = pEntry->GetLine();
+    }
 }
 
 // ----------------------------------------------------------------------------
 // group name
 // ----------------------------------------------------------------------------
 
-void ConfigGroup::Rename(const wxString& newName)
+void wxFileConfigGroup::UpdateGroupAndSubgroupsLines()
 {
-    m_strName = newName;
+    // update the line of this group
+    wxFileConfigLineList *line = GetGroupLine();
+    wxCHECK_RET( line, _T("a non root group must have a corresponding line!") );
 
-    LineList *line = GetGroupLine();
-    wxString strFullName;
-    strFullName << wxT("[") << (GetFullName().c_str() + 1) << wxT("]"); // +1: no '/'
-    line->SetText(strFullName);
+    // +1: skip the leading '/'
+    line->SetText(wxString::Format(_T("[%s]"), GetFullName().c_str() + 1));
 
-    SetDirty();
+
+    // also update all subgroups as they have this groups name in their lines
+    const size_t nCount = m_aSubgroups.Count();
+    for ( size_t n = 0; n < nCount; n++ )
+    {
+        m_aSubgroups[n]->UpdateGroupAndSubgroupsLines();
+    }
+}
+
+void wxFileConfigGroup::Rename(const wxString& newName)
+{
+    wxCHECK_RET( m_pParent, _T("the root group can't be renamed") );
+
+    m_strName = newName;
+
+    // update the group lines recursively
+    UpdateGroupAndSubgroupsLines();
 }
 
-wxString ConfigGroup::GetFullName() const
+wxString wxFileConfigGroup::GetFullName() const
 {
-  if ( Parent() )
-    return Parent()->GetFullName() + wxCONFIG_PATH_SEPARATOR + Name();
-  else
-    return wxT("");
+    wxString fullname;
+    if ( Parent() )
+        fullname = Parent()->GetFullName() + wxCONFIG_PATH_SEPARATOR + Name();
+
+    return fullname;
 }
 
 // ----------------------------------------------------------------------------
@@ -1084,14 +1530,14 @@ wxString ConfigGroup::GetFullName() const
 // ----------------------------------------------------------------------------
 
 // use binary search because the array is sorted
-ConfigEntry *
-ConfigGroup::FindEntry(const wxChar *szName) const
+wxFileConfigEntry *
+wxFileConfigGroup::FindEntry(const wxChar *szName) const
 {
   size_t i,
        lo = 0,
        hi = m_aEntries.Count();
   int res;
-  ConfigEntry *pEntry;
+  wxFileConfigEntry *pEntry;
 
   while ( lo < hi ) {
     i = (lo + hi)/2;
@@ -1114,14 +1560,14 @@ ConfigGroup::FindEntry(const wxChar *szName) const
   return NULL;
 }
 
-ConfigGroup *
-ConfigGroup::FindSubgroup(const wxChar *szName) const
+wxFileConfigGroup *
+wxFileConfigGroup::FindSubgroup(const wxChar *szName) const
 {
   size_t i,
        lo = 0,
        hi = m_aSubgroups.Count();
   int res;
-  ConfigGroup *pGroup;
+  wxFileConfigGroup *pGroup;
 
   while ( lo < hi ) {
     i = (lo + hi)/2;
@@ -1149,27 +1595,25 @@ ConfigGroup::FindSubgroup(const wxChar *szName) const
 // ----------------------------------------------------------------------------
 
 // create a new entry and add it to the current group
-ConfigEntry *
-ConfigGroup::AddEntry(const wxString& strName, int nLine)
+wxFileConfigEntry *wxFileConfigGroup::AddEntry(const wxString& strName, int nLine)
 {
-  wxASSERT( FindEntry(strName) == NULL );
+    wxASSERT( FindEntry(strName) == 0 );
 
-  ConfigEntry *pEntry = new ConfigEntry(this, strName, nLine);
-  m_aEntries.Add(pEntry);
+    wxFileConfigEntry   *pEntry = new wxFileConfigEntry(this, strName, nLine);
 
-  return pEntry;
+    m_aEntries.Add(pEntry);
+    return pEntry;
 }
 
 // create a new group and add it to the current group
-ConfigGroup *
-ConfigGroup::AddSubgroup(const wxString& strName)
+wxFileConfigGroup *wxFileConfigGroup::AddSubgroup(const wxString& strName)
 {
-  wxASSERT( FindSubgroup(strName) == NULL );
+    wxASSERT( FindSubgroup(strName) == 0 );
 
-  ConfigGroup *pGroup = new ConfigGroup(this, strName, m_pConfig);
-  m_aSubgroups.Add(pGroup);
+    wxFileConfigGroup   *pGroup = new wxFileConfigGroup(this, strName, m_pConfig);
 
-  return pGroup;
+    m_aSubgroups.Add(pGroup);
+    return pGroup;
 }
 
 // ----------------------------------------------------------------------------
@@ -1183,84 +1627,132 @@ ConfigGroup::AddSubgroup(const wxString& strName)
   delete several of them.
  */
 
-bool ConfigGroup::DeleteSubgroupByName(const wxChar *szName)
+bool wxFileConfigGroup::DeleteSubgroupByName(const wxChar *szName)
 {
-  return DeleteSubgroup(FindSubgroup(szName));
+    wxFileConfigGroup * const pGroup = FindSubgroup(szName);
+
+    return pGroup ? DeleteSubgroup(pGroup) : false;
 }
 
-// doesn't delete the subgroup itself, but does remove references to it from
-// all other data structures (and normally the returned pointer should be
-// deleted a.s.a.p. because there is nothing much to be done with it anyhow)
-bool ConfigGroup::DeleteSubgroup(ConfigGroup *pGroup)
+// Delete the subgroup and remove all references to it from
+// other data structures.
+bool wxFileConfigGroup::DeleteSubgroup(wxFileConfigGroup *pGroup)
 {
-  wxCHECK( pGroup != NULL, FALSE ); // deleting non existing group?
+    wxCHECK_MSG( pGroup, false, _T("deleting non existing group?") );
 
-  // delete all entries
-  size_t nCount = pGroup->m_aEntries.Count();
-  for ( size_t nEntry = 0; nEntry < nCount; nEntry++ ) {
-    LineList *pLine = pGroup->m_aEntries[nEntry]->GetLine();
-    if ( pLine != NULL )
-      m_pConfig->LineListRemove(pLine);
-  }
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("Deleting group '%s' from '%s'"),
+                pGroup->Name().c_str(),
+                Name().c_str() );
 
-  // and subgroups of this sungroup
-  nCount = pGroup->m_aSubgroups.Count();
-  for ( size_t nGroup = 0; nGroup < nCount; nGroup++ ) {
-    pGroup->DeleteSubgroup(pGroup->m_aSubgroups[0]);
-  }
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("  (m_pLine) = prev: %p, this %p, next %p"),
+                ((m_pLine) ? m_pLine->Prev() : 0),
+                m_pLine,
+                ((m_pLine) ? m_pLine->Next() : 0) );
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("  text: '%s'"),
+                ((m_pLine) ? m_pLine->Text().c_str() : wxEmptyString) );
 
-  LineList *pLine = pGroup->m_pLine;
-  if ( pLine != NULL ) {
-    // notice that we may do this test inside the previous "if" because the
-    // last entry's line is surely !NULL
-    if ( pGroup == m_pLastGroup ) {
-      // our last entry is being deleted - find the last one which stays
-      wxASSERT( m_pLine != NULL );  // we have a subgroup with !NULL pLine...
+    // delete all entries...
+    size_t nCount = pGroup->m_aEntries.Count();
 
-      // go back until we find a subgroup or reach the group's line
-      ConfigGroup *pNewLast = NULL;
-      size_t n, nSubgroups = m_aSubgroups.Count();
-      LineList *pl;
-      for ( pl = pLine->Prev(); pl != m_pLine; pl = pl->Prev() ) {
-        // is it our subgroup?
-        for ( n = 0; (pNewLast == NULL) && (n < nSubgroups); n++ ) {
-          // do _not_ call GetGroupLine! we don't want to add it to the local
-          // file if it's not already there
-          if ( m_aSubgroups[n]->m_pLine == m_pLine )
-            pNewLast = m_aSubgroups[n];
+    wxLogTrace(FILECONF_TRACE_MASK,
+               _T("Removing %lu entries"), (unsigned long)nCount );
+
+    for ( size_t nEntry = 0; nEntry < nCount; nEntry++ )
+    {
+        wxFileConfigLineList *pLine = pGroup->m_aEntries[nEntry]->GetLine();
+
+        if ( pLine )
+        {
+            wxLogTrace( FILECONF_TRACE_MASK,
+                        _T("    '%s'"),
+                        pLine->Text().c_str() );
+            m_pConfig->LineListRemove(pLine);
         }
+    }
 
-        if ( pNewLast != NULL ) // found?
-          break;
-      }
+    // ...and subgroups of this subgroup
+    nCount = pGroup->m_aSubgroups.Count();
 
-      if ( pl == m_pLine ) {
-        wxASSERT( !pNewLast );  // how comes it has the same line as we?
+    wxLogTrace( FILECONF_TRACE_MASK,
+                _T("Removing %lu subgroups"), (unsigned long)nCount );
 
-        // we've reached the group line without finding any subgroups
-        m_pLastGroup = NULL;
-      }
-      else
-        m_pLastGroup = pNewLast;
+    for ( size_t nGroup = 0; nGroup < nCount; nGroup++ )
+    {
+        pGroup->DeleteSubgroup(pGroup->m_aSubgroups[0]);
     }
 
-    m_pConfig->LineListRemove(pLine);
-  }
+    // and then finally the group itself
+    wxFileConfigLineList *pLine = pGroup->m_pLine;
+    if ( pLine )
+    {
+        wxLogTrace( FILECONF_TRACE_MASK,
+                    _T("  Removing line for group '%s' : '%s'"),
+                    pGroup->Name().c_str(),
+                    pLine->Text().c_str() );
+        wxLogTrace( FILECONF_TRACE_MASK,
+                    _T("  Removing from group '%s' : '%s'"),
+                    Name().c_str(),
+                    ((m_pLine) ? m_pLine->Text().c_str() : wxEmptyString) );
+
+        // notice that we may do this test inside the previous "if"
+        // because the last entry's line is surely !NULL
+        if ( pGroup == m_pLastGroup )
+        {
+            wxLogTrace( FILECONF_TRACE_MASK,
+                        _T("  Removing last group") );
+
+            // our last entry is being deleted, so find the last one which
+            // stays by going back until we find a subgroup or reach the
+            // group line
+            const size_t nSubgroups = m_aSubgroups.Count();
+
+            m_pLastGroup = NULL;
+            for ( wxFileConfigLineList *pl = pLine->Prev();
+                  pl && pl != m_pLine && !m_pLastGroup;
+                  pl = pl->Prev() )
+            {
+                // does this line belong to our subgroup?
+                for ( size_t n = 0; n < nSubgroups; n++ )
+                {
+                    // do _not_ call GetGroupLine! we don't want to add it to
+                    // the local file if it's not already there
+                    if ( m_aSubgroups[n]->m_pLine == pl )
+                    {
+                        m_pLastGroup = m_aSubgroups[n];
+                        break;
+                    }
+                }
+            }
+        }
 
-  SetDirty();
+        m_pConfig->LineListRemove(pLine);
+    }
+    else
+    {
+        wxLogTrace( FILECONF_TRACE_MASK,
+                    _T("  No line entry for Group '%s'?"),
+                    pGroup->Name().c_str() );
+    }
 
-  m_aSubgroups.Remove(pGroup);
-  delete pGroup;
+    m_aSubgroups.Remove(pGroup);
+    delete pGroup;
 
-  return TRUE;
+    return true;
 }
 
-bool ConfigGroup::DeleteEntry(const wxChar *szName)
+bool wxFileConfigGroup::DeleteEntry(const wxChar *szName)
 {
-  ConfigEntry *pEntry = FindEntry(szName);
-  wxCHECK( pEntry != NULL, FALSE );  // deleting non existing item?
+  wxFileConfigEntry *pEntry = FindEntry(szName);
+  if ( !pEntry )
+  {
+      // entry doesn't exist, nothing to do
+      return false;
+  }
 
-  LineList *pLine = pEntry->GetLine();
+  wxFileConfigLineList *pLine = pEntry->GetLine();
   if ( pLine != NULL ) {
     // notice that we may do this test inside the previous "if" because the
     // last entry's line is surely !NULL
@@ -1269,9 +1761,9 @@ bool ConfigGroup::DeleteEntry(const wxChar *szName)
       wxASSERT( m_pLine != NULL );  // if we have an entry with !NULL pLine...
 
       // go back until we find another entry or reach the group's line
-      ConfigEntry *pNewLast = NULL;
+      wxFileConfigEntry *pNewLast = NULL;
       size_t n, nEntries = m_aEntries.Count();
-      LineList *pl;
+      wxFileConfigLineList *pl;
       for ( pl = pLine->Prev(); pl != m_pLine; pl = pl->Prev() ) {
         // is it our subgroup?
         for ( n = 0; (pNewLast == NULL) && (n < nEntries); n++ ) {
@@ -1296,44 +1788,31 @@ bool ConfigGroup::DeleteEntry(const wxChar *szName)
     m_pConfig->LineListRemove(pLine);
   }
 
-  // we must be written back for the changes to be saved
-  SetDirty();
-
   m_aEntries.Remove(pEntry);
   delete pEntry;
 
-  return TRUE;
-}
-
-// ----------------------------------------------------------------------------
-//
-// ----------------------------------------------------------------------------
-void ConfigGroup::SetDirty()
-{
-  m_bDirty = TRUE;
-  if ( Parent() != NULL )             // propagate upwards
-    Parent()->SetDirty();
+  return true;
 }
 
 // ============================================================================
-// wxFileConfig::ConfigEntry
+// wxFileConfig::wxFileConfigEntry
 // ============================================================================
 
 // ----------------------------------------------------------------------------
 // ctor
 // ----------------------------------------------------------------------------
-ConfigEntry::ConfigEntry(ConfigGroup *pParent,
+wxFileConfigEntry::wxFileConfigEntry(wxFileConfigGroup *pParent,
                                        const wxString& strName,
                                        int nLine)
                          : m_strName(strName)
 {
-  wxASSERT( !strName.IsEmpty() );
+  wxASSERT( !strName.empty() );
 
   m_pParent = pParent;
   m_nLine   = nLine;
   m_pLine   = NULL;
 
-  m_bDirty  = FALSE;
+  m_bHasValue = false;
 
   m_bImmutable = strName[0] == wxCONFIG_IMMUTABLE_PREFIX;
   if ( m_bImmutable )
@@ -1344,7 +1823,7 @@ ConfigEntry::ConfigEntry(ConfigGroup *pParent,
 // set value
 // ----------------------------------------------------------------------------
 
-void ConfigEntry::SetLine(LineList *pLine)
+void wxFileConfigEntry::SetLine(wxFileConfigLineList *pLine)
 {
   if ( m_pLine != NULL ) {
     wxLogWarning(_("entry '%s' appears more than once in group '%s'"),
@@ -1355,48 +1834,57 @@ void ConfigEntry::SetLine(LineList *pLine)
   Group()->SetLastEntry(this);
 }
 
-// second parameter is FALSE if we read the value from file and prevents the
+// second parameter is false if we read the value from file and prevents the
 // entry from being marked as 'dirty'
-void ConfigEntry::SetValue(const wxString& strValue, bool bUser)
+void wxFileConfigEntry::SetValue(const wxString& strValue, bool bUser)
 {
-  if ( bUser && IsImmutable() ) {
-    wxLogWarning(_("attempt to change immutable key '%s' ignored."),
-                 Name().c_str());
-    return;
-  }
-
-  // do nothing if it's the same value
-  if ( strValue == m_strValue )
-    return;
+    if ( bUser && IsImmutable() )
+    {
+        wxLogWarning( _("attempt to change immutable key '%s' ignored."),
+                      Name().c_str());
+        return;
+    }
 
-  m_strValue = strValue;
+    // do nothing if it's the same value: but don't test for it if m_bHasValue
+    // hadn't been set yet or we'd never write empty values to the file
+    if ( m_bHasValue && strValue == m_strValue )
+        return;
 
-  if ( bUser ) {
-    wxString strVal = FilterOutValue(strValue);
-    wxString strLine;
-    strLine << FilterOutEntryName(m_strName) << wxT('=') << strVal;
+    m_bHasValue = true;
+    m_strValue = strValue;
 
-    if ( m_pLine != NULL ) {
-      // entry was read from the local config file, just modify the line
-      m_pLine->SetText(strLine);
-    }
-    else {
-      // add a new line to the file
-      wxASSERT( m_nLine == wxNOT_FOUND );   // consistency check
+    if ( bUser )
+    {
+        wxString strValFiltered;
 
-      m_pLine = Group()->Config()->LineListInsert(strLine,
-                                                  Group()->GetLastEntryLine());
-      Group()->SetLastEntry(this);
-    }
+        if ( Group()->Config()->GetStyle() & wxCONFIG_USE_NO_ESCAPE_CHARACTERS )
+        {
+            strValFiltered = strValue;
+        }
+        else {
+            strValFiltered = FilterOutValue(strValue);
+        }
 
-    SetDirty();
-  }
-}
+        wxString    strLine;
+        strLine << FilterOutEntryName(m_strName) << wxT('=') << strValFiltered;
 
-void ConfigEntry::SetDirty()
-{
-  m_bDirty = TRUE;
-  Group()->SetDirty();
+        if ( m_pLine )
+        {
+            // entry was read from the local config file, just modify the line
+            m_pLine->SetText(strLine);
+        }
+        else // this entry didn't exist in the local file
+        {
+            // add a new line to the file: note that line returned by
+            // GetLastEntryLine() may be NULL if we're in the root group and it
+            // doesn't have any entries yet, but this is ok as passing NULL
+            // line to LineListInsert() means to prepend new line to the list
+            wxFileConfigLineList *line = Group()->GetLastEntryLine();
+            m_pLine = Group()->Config()->LineListInsert(strLine, line);
+
+            Group()->SetLastEntry(this);
+        }
+    }
 }
 
 // ============================================================================
@@ -1407,8 +1895,7 @@ void ConfigEntry::SetDirty()
 // compare functions for array sorting
 // ----------------------------------------------------------------------------
 
-int CompareEntries(ConfigEntry *p1,
-                   ConfigEntry *p2)
+int CompareEntries(wxFileConfigEntry *p1, wxFileConfigEntry *p2)
 {
   #if wxCONFIG_CASE_SENSITIVE
     return wxStrcmp(p1->Name(), p2->Name());
@@ -1417,8 +1904,7 @@ int CompareEntries(ConfigEntry *p1,
   #endif
 }
 
-int CompareGroups(ConfigGroup *p1,
-                  ConfigGroup *p2)
+int CompareGroups(wxFileConfigGroup *p1, wxFileConfigGroup *p2)
 {
   #if wxCONFIG_CASE_SENSITIVE
     return wxStrcmp(p1->Name(), p2->Name());
@@ -1437,7 +1923,7 @@ static wxString FilterInValue(const wxString& str)
   wxString strResult;
   strResult.Alloc(str.Len());
 
-  bool bQuoted = !str.IsEmpty() && str[0] == '"';
+  bool bQuoted = !str.empty() && str[0] == '"';
 
   for ( size_t n = bQuoted ? 1 : 0; n < str.Len(); n++ ) {
     if ( str[n] == wxT('\\') ) {
@@ -1556,14 +2042,22 @@ static wxString FilterOutEntryName(const wxString& str)
   strResult.Alloc(str.Len());
 
   for ( const wxChar *pc = str.c_str(); *pc != wxT('\0'); pc++ ) {
-    wxChar c = *pc;
+    const wxChar c = *pc;
 
     // we explicitly allow some of "safe" chars and 8bit ASCII characters
-    // which will probably never have special meaning
+    // which will probably never have special meaning and with which we can't
+    // use isalnum() anyhow (in ASCII built, in Unicode it's just fine)
+    //
     // NB: note that wxCONFIG_IMMUTABLE_PREFIX and wxCONFIG_PATH_SEPARATOR
     //     should *not* be quoted
-    if ( !wxIsalnum(c) && !wxStrchr(wxT("@_/-!.*%"), c) && ((c & 0x80) == 0) )
+    if (
+#if !wxUSE_UNICODE
+            ((unsigned char)c < 127) &&
+#endif // ANSI
+         !wxIsalnum(c) && !wxStrchr(wxT("@_/-!.*%"), c) )
+    {
       strResult += wxT('\\');
+    }
 
     strResult += c;
   }
@@ -1582,4 +2076,3 @@ static wxString GetAppName(const wxString& appName)
 }
 
 #endif // wxUSE_CONFIG
-