minor changes to registry classes and wxIniConfig added

[wxWidgets.git] / include / wx / string.h

diff --git a/include/wx/string.h b/include/wx/string.h
index 1145fffbf453b0644dcc621a367ee3a73cd30c1d..efe6e9fbe458620d4aa4ccd0ba18c7fdcd5485c4 100644 (file)
--- a/include/wx/string.h
+++ b/include/wx/string.h
@@ -6,7 +6,7 @@
 // Created:     29/01/98
 // RCS-ID:      $Id$
 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
 // Created:     29/01/98
 // RCS-ID:      $Id$
 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>

-// Licence:    wxWindows license
+// Licence:     wxWindows license

 /////////////////////////////////////////////////////////////////////////////
 
 #ifndef __WXSTRINGH__
 /////////////////////////////////////////////////////////////////////////////
 
 #ifndef __WXSTRINGH__


@@ -26,17 +26,20 @@
 #include <stdio.h>
 #include <stdarg.h>
 #include <limits.h>
 #include <stdio.h>
 #include <stdarg.h>
 #include <limits.h>

+#include <stdlib.h>

 
 #ifndef  WX_PRECOMP
   #include "wx/defs.h"     // Robert Roebling
 
 #ifndef  WX_PRECOMP
   #include "wx/defs.h"     // Robert Roebling

-  #include "wx/object.h"
+  #ifdef    WXSTRING_IS_WXOBJECT
+    #include "wx/object.h"
+  #endif

 #endif
 
 #include "wx/debug.h"
 
 /** @name wxString library
     @memo Efficient wxString class [more or less] compatible with MFC CString,
 #endif
 
 #include "wx/debug.h"
 
 /** @name wxString library
     @memo Efficient wxString class [more or less] compatible with MFC CString,

-          wxWindows wxString and std::string and some handy functions 
+          wxWindows wxString and std::string and some handy functions

           missing from string.h.
   */
 //@{
           missing from string.h.
   */
 //@{


@@ -45,7 +48,7 @@
 // macros
 // ---------------------------------------------------------------------------
 
 // macros
 // ---------------------------------------------------------------------------
 

-/** @name Macros 
+/** @name Macros

     @memo You can switch off wxString/std::string compatibility if desired
  */
 /// compile the std::string compatibility functions
     @memo You can switch off wxString/std::string compatibility if desired
  */
 /// compile the std::string compatibility functions


@@ -65,7 +68,7 @@
 #define   ASSERT_VALID_INDEX(i) wxASSERT( (unsigned)(i) < Len() )
 
 // ---------------------------------------------------------------------------
 #define   ASSERT_VALID_INDEX(i) wxASSERT( (unsigned)(i) < Len() )
 
 // ---------------------------------------------------------------------------

-/** @name Global functions complementing standard C string library 
+/** @name Global functions complementing standard C string library

     @memo replacements for strlen() and portable strcasecmp()
  */
 // ---------------------------------------------------------------------------
     @memo replacements for strlen() and portable strcasecmp()
  */
 // ---------------------------------------------------------------------------


@@ -78,17 +81,41 @@ inline size_t  WXDLLEXPORT Strlen(const char *psz)
   { return psz ? strlen(psz) : 0; }
 
 /// portable strcasecmp/_stricmp
   { return psz ? strlen(psz) : 0; }
 
 /// portable strcasecmp/_stricmp

-int WXDLLEXPORT Stricmp(const char *, const char *);
+inline int WXDLLEXPORT Stricmp(const char *psz1, const char *psz2)
+{
+#if     defined(_MSC_VER)
+  return _stricmp(psz1, psz2);
+#elif defined(__BORLANDC__)
+  return stricmp(psz1, psz2);
+#elif   defined(__UNIX__) || defined(__GNUWIN32__)
+  return strcasecmp(psz1, psz2);
+#else
+  // almost all compilers/libraries provide this function (unfortunately under
+  // different names), that's why we don't implement our own which will surely
+  // be more efficient than this code (uncomment to use):
+  /*
+    register char c1, c2;
+    do {
+      c1 = tolower(*psz1++);
+      c2 = tolower(*psz2++);
+    } while ( c1 && (c1 == c2) );
+
+    return c1 - c2;
+  */
+
+  #error  "Please define string case-insensitive compare for your OS/compiler"
+#endif  // OS/compiler
+}

 
 // ----------------------------------------------------------------------------
 // global data
 // ----------------------------------------------------------------------------
 
 // global pointer to empty string
 
 // ----------------------------------------------------------------------------
 // global data
 // ----------------------------------------------------------------------------
 
 // global pointer to empty string

-extern const char *g_szNul;
+WXDLLEXPORT_DATA(extern const char*) g_szNul;

 
 // return an empty wxString
 
 // return an empty wxString

-class wxString; // not yet defined
+class WXDLLEXPORT wxString; // not yet defined

 inline const wxString& wxGetEmptyString() { return *(wxString *)&g_szNul; }
 
 // ---------------------------------------------------------------------------
 inline const wxString& wxGetEmptyString() { return *(wxString *)&g_szNul; }
 
 // ---------------------------------------------------------------------------


@@ -102,17 +129,17 @@ struct WXDLLEXPORT wxStringData
           nAllocLength; // allocated memory size
 
   // mimics declaration 'char data[nAllocLength]'
           nAllocLength; // allocated memory size
 
   // mimics declaration 'char data[nAllocLength]'

-  char* data() const { return (char*)(this + 1); }  
+  char* data() const { return (char*)(this + 1); }

 
   // empty string has a special ref count so it's never deleted
   bool  IsEmpty()   const { return nRefs == -1; }
   bool  IsShared()  const { return nRefs > 1;   }
 
   // lock/unlock
 
   // empty string has a special ref count so it's never deleted
   bool  IsEmpty()   const { return nRefs == -1; }
   bool  IsShared()  const { return nRefs > 1;   }
 
   // lock/unlock

-  void  Lock()   { if ( !IsEmpty() ) nRefs++;                             }
-  void  Unlock() { if ( !IsEmpty() && --nRefs == 0) delete (char *)this;  }
+  void  Lock()   { if ( !IsEmpty() ) nRefs++;                    }
+  void  Unlock() { if ( !IsEmpty() && --nRefs == 0) free(this);  }

 
 

-  // if we had taken control over string memory (GetWriteBuf), it's 
+  // if we had taken control over string memory (GetWriteBuf), it's

   // intentionally put in invalid state
   void  Validate(bool b)  { nRefs = b ? 1 : 0; }
   bool  IsValid() const   { return nRefs != 0; }
   // intentionally put in invalid state
   void  Validate(bool b)  { nRefs = b ? 1 : 0; }
   bool  IsValid() const   { return nRefs != 0; }


@@ -129,9 +156,9 @@ struct WXDLLEXPORT wxStringData
     This class aims to be as compatible as possible with the new standard
     std::string class, but adds some additional functions and should be
     at least as efficient than the standard implementation.
     This class aims to be as compatible as possible with the new standard
     std::string class, but adds some additional functions and should be
     at least as efficient than the standard implementation.

-    
-    Performance note: it's more efficient to write functions which take 
-    "const String&" arguments than "const char *" if you assign the argument 
+
+    Performance note: it's more efficient to write functions which take
+    "const String&" arguments than "const char *" if you assign the argument

     to another string.
 
     It was compiled and tested under Win32, Linux (libc 5 & 6), Solaris 5.5.
     to another string.
 
     It was compiled and tested under Win32, Linux (libc 5 & 6), Solaris 5.5.


@@ -140,7 +167,7 @@ struct WXDLLEXPORT wxStringData
       - ressource support (string tables in ressources)
       - more wide character (UNICODE) support
       - regular expressions support
       - ressource support (string tables in ressources)
       - more wide character (UNICODE) support
       - regular expressions support

-    
+

 @memo     A non-template portable wxString class implementing copy-on-write.
 @author   VZ
 @version  1.3
 @memo     A non-template portable wxString class implementing copy-on-write.
 @author   VZ
 @version  1.3


@@ -157,33 +184,89 @@ struct WXDLLEXPORT wxStringData
 
 friend class wxArrayString;
 
 
 friend class wxArrayString;
 

+  // NB: special care was taken in arrangin the member functions in such order
+  //     that all inline functions can be effectively inlined
+private:
+  // points to data preceded by wxStringData structure with ref count info
+  char *m_pchData;
+
+  // accessor to string data
+  wxStringData* GetStringData() const { return (wxStringData*)m_pchData - 1; }
+
+  // string (re)initialization functions
+    // initializes the string to the empty value (must be called only from
+    // ctors, use Reinit() otherwise)
+  void Init() { m_pchData = (char *)g_szNul; }
+    // initializaes the string with (a part of) C-string
+  void InitWith(const char *psz, size_t nPos = 0, size_t nLen = STRING_MAXLEN);
+    // as Init, but also frees old data
+  void Reinit() { GetStringData()->Unlock(); Init(); }
+
+  // memory allocation
+    // allocates memory for string of lenght nLen
+  void AllocBuffer(size_t nLen);
+    // copies data to another string
+  void AllocCopy(wxString&, int, int) const;
+    // effectively copies data to string
+  void AssignCopy(size_t, const char *);
+
+  // append a (sub)string
+  void ConcatSelf(int nLen, const char *src);
+
+  // functions called before writing to the string: they copy it if there
+  // are other references to our data (should be the only owner when writing)
+  void CopyBeforeWrite();
+  void AllocBeforeWrite(size_t);
+

 public:
   /** @name constructors & dtor */
   //@{
     /// ctor for an empty string
 public:
   /** @name constructors & dtor */
   //@{
     /// ctor for an empty string

-  wxString();
+  wxString() { Init(); }

     /// copy ctor
     /// copy ctor

-  wxString(const wxString& stringSrc);        
+  wxString(const wxString& stringSrc)
+  {
+    wxASSERT( stringSrc.GetStringData()->IsValid() );
+
+    if ( stringSrc.IsEmpty() ) {
+      // nothing to do for an empty string
+      Init();
+    }
+    else {
+      m_pchData = stringSrc.m_pchData;            // share same data
+      GetStringData()->Lock();                    // => one more copy
+    }
+  }

     /// string containing nRepeat copies of ch
     /// string containing nRepeat copies of ch

-  wxString(char ch, size_t nRepeat = 1);       
+  wxString(char ch, size_t nRepeat = 1);

     /// ctor takes first nLength characters from C string
     /// ctor takes first nLength characters from C string

-  wxString(const char *psz, size_t nLength = STRING_MAXLEN);
+    // (default value of STRING_MAXLEN means take all the string)
+  wxString(const char *psz, size_t nLength = STRING_MAXLEN)
+    { InitWith(psz, 0, nLength); }

     /// from C string (for compilers using unsigned char)
   wxString(const unsigned char* psz, size_t nLength = STRING_MAXLEN);
     /// from wide (UNICODE) string
   wxString(const wchar_t *pwz);
     /// dtor is not virtual, this class must not be inherited from!
     /// from C string (for compilers using unsigned char)
   wxString(const unsigned char* psz, size_t nLength = STRING_MAXLEN);
     /// from wide (UNICODE) string
   wxString(const wchar_t *pwz);
     /// dtor is not virtual, this class must not be inherited from!

- ~wxString();
+ ~wxString() { GetStringData()->Unlock(); }

   //@}
 
   /** @name generic attributes & operations */
   //@{
     /// as standard strlen()
   //@}
 
   /** @name generic attributes & operations */
   //@{
     /// as standard strlen()

-  size_t Len() const { return GetStringData()->nDataLength; }
+  uint Len() const { return GetStringData()->nDataLength; }

     /// string contains any characters?
     /// string contains any characters?

-  bool IsEmpty() const;
+  bool IsEmpty() const { return Len() == 0; }

     /// reinitialize string (and free data!)
     /// reinitialize string (and free data!)

-  void Empty();
+  void Empty()
+  {
+    if ( GetStringData()->nDataLength != 0 )
+      Reinit();
+
+    wxASSERT( GetStringData()->nDataLength == 0 );
+    wxASSERT( GetStringData()->nAllocLength == 0 );
+  }
+

     /// Is an ascii value
   bool IsAscii() const;
     /// Is a number
     /// Is an ascii value
   bool IsAscii() const;
     /// Is a number


@@ -196,10 +279,10 @@ public:
   //@{
     /// read access
     char  GetChar(size_t n) const
   //@{
     /// read access
     char  GetChar(size_t n) const

-         { ASSERT_VALID_INDEX( n );  return m_pchData[n]; }
+      { ASSERT_VALID_INDEX( n );  return m_pchData[n]; }

     /// read/write access
     char& GetWritableChar(size_t n)
     /// read/write access
     char& GetWritableChar(size_t n)

-         { ASSERT_VALID_INDEX( n ); CopyBeforeWrite(); return m_pchData[n]; }
+      { ASSERT_VALID_INDEX( n ); CopyBeforeWrite(); return m_pchData[n]; }

     /// write access
     void  SetChar(size_t n, char ch)
       { ASSERT_VALID_INDEX( n ); CopyBeforeWrite(); m_pchData[n] = ch; }
     /// write access
     void  SetChar(size_t n, char ch)
       { ASSERT_VALID_INDEX( n ); CopyBeforeWrite(); m_pchData[n] = ch; }


@@ -208,7 +291,7 @@ public:
     char  Last() const
       { wxASSERT( !IsEmpty() ); return m_pchData[Len() - 1]; }
     /// get writable last character
     char  Last() const
       { wxASSERT( !IsEmpty() ); return m_pchData[Len() - 1]; }
     /// get writable last character

-    char& Last() 
+    char& Last()

       { wxASSERT( !IsEmpty() ); CopyBeforeWrite(); return m_pchData[Len()-1]; }
 
     /// operator version of GetChar
       { wxASSERT( !IsEmpty() ); CopyBeforeWrite(); return m_pchData[Len()-1]; }
 
     /// operator version of GetChar


@@ -222,7 +305,7 @@ public:
       { ASSERT_VALID_INDEX( n ); CopyBeforeWrite(); return m_pchData[n]; }
 
     /// implicit conversion to C string
       { ASSERT_VALID_INDEX( n ); CopyBeforeWrite(); return m_pchData[n]; }
 
     /// implicit conversion to C string

-    operator const char*() const { return m_pchData; } 
+    operator const char*() const { return m_pchData; }

     /// explicit conversion to C string (use this with printf()!)
     const char* c_str()   const { return m_pchData; }
     ///
     /// explicit conversion to C string (use this with printf()!)
     const char* c_str()   const { return m_pchData; }
     ///


@@ -242,30 +325,38 @@ public:
     ///
   wxString& operator=(const wchar_t *pwz);
   //@}
     ///
   wxString& operator=(const wchar_t *pwz);
   //@}

-  
+

   /** @name string concatenation */
   //@{
     /** @name in place concatenation */
   /** @name string concatenation */
   //@{
     /** @name in place concatenation */

-    //@{
-      /// string += string
-  void operator+=(const wxString& string);
-      /// string += C string
-  void operator+=(const char *psz);
-      /// string += char
-  void operator+=(char ch);
-    //@}

     /** @name concatenate and return the result
     /** @name concatenate and return the result

-        left to right associativity of << allows to write 
+        left to right associativity of << allows to write

         things like "str << str1 << str2 << ..."          */
     //@{
       /// as +=
         things like "str << str1 << str2 << ..."          */
     //@{
       /// as +=

-  wxString& operator<<(const wxString& string);
+  wxString& operator<<(const wxString& s)
+  {
+    wxASSERT( s.GetStringData()->IsValid() );
+
+    ConcatSelf(s.Len(), s);
+    return *this;
+  }

       /// as +=
       /// as +=

-  wxString& operator<<(char ch);
+  wxString& operator<<(const char *psz)
+    { ConcatSelf(Strlen(psz), psz); return *this; }

       /// as +=
       /// as +=

-  wxString& operator<<(const char *psz);
+  wxString& operator<<(char ch) { ConcatSelf(1, &ch); return *this; }

     //@}
     //@}

-    
+
+    //@{
+      /// string += string
+  void operator+=(const wxString& s) { (void)operator<<(s); }
+      /// string += C string
+  void operator+=(const char *psz) { (void)operator<<(psz); }
+      /// string += char
+  void operator+=(char ch) { (void)operator<<(ch); }
+    //@}
+

     /** @name return resulting string */
     //@{
       ///
     /** @name return resulting string */
     //@{
       ///


@@ -280,17 +371,17 @@ public:
   friend wxString operator+(const char *psz, const wxString& string);
     //@}
   //@}
   friend wxString operator+(const char *psz, const wxString& string);
     //@}
   //@}

-  
+

   /** @name string comparison */
   //@{
   /** @name string comparison */
   //@{

-    /** 
-    case-sensitive comparaison
+    /**
+    case-sensitive comparison

     @return 0 if equal, +1 if greater or -1 if less
     @see CmpNoCase, IsSameAs
     */
   int  Cmp(const char *psz) const { return strcmp(c_str(), psz); }
     /**
     @return 0 if equal, +1 if greater or -1 if less
     @see CmpNoCase, IsSameAs
     */
   int  Cmp(const char *psz) const { return strcmp(c_str(), psz); }
     /**

-    case-insensitive comparaison, return code as for wxString::Cmp()
+    case-insensitive comparison, return code as for wxString::Cmp()

     @see: Cmp, IsSameAs
     */
   int  CmpNoCase(const char *psz) const { return Stricmp(c_str(), psz); }
     @see: Cmp, IsSameAs
     */
   int  CmpNoCase(const char *psz) const { return Stricmp(c_str(), psz); }


@@ -300,20 +391,20 @@ public:
     @return  TRUE if strings are equal, FALSE otherwise
     @see     Cmp, CmpNoCase
     */
     @return  TRUE if strings are equal, FALSE otherwise
     @see     Cmp, CmpNoCase
     */

-  bool IsSameAs(const char *psz, bool bCase = TRUE) const 
+  bool IsSameAs(const char *psz, bool bCase = TRUE) const

     { return !(bCase ? Cmp(psz) : CmpNoCase(psz)); }
   //@}
     { return !(bCase ? Cmp(psz) : CmpNoCase(psz)); }
   //@}

-  
+

   /** @name other standard string operations */
   //@{
     /** @name simple sub-string extraction
      */
     //@{
   /** @name other standard string operations */
   //@{
     /** @name simple sub-string extraction
      */
     //@{

-      /** 
-      return substring starting at nFirst of length 
+      /**
+      return substring starting at nFirst of length

       nCount (or till the end if nCount = default value)
       */
       nCount (or till the end if nCount = default value)
       */

-  wxString Mid(size_t nFirst, size_t nCount = STRING_MAXLEN) const;  
+  wxString Mid(size_t nFirst, size_t nCount = STRING_MAXLEN) const;

       /// get first nCount characters
   wxString Left(size_t nCount) const;
       /// get all characters before the first occurence of ch
       /// get first nCount characters
   wxString Left(size_t nCount) const;
       /// get all characters before the first occurence of ch


@@ -331,9 +422,9 @@ public:
       /// (returns the whole string if ch not found)
   wxString Right(char ch) const;
     //@}
       /// (returns the whole string if ch not found)
   wxString Right(char ch) const;
     //@}

-    
+

     /** @name case conversion */
     /** @name case conversion */

-    //@{ 
+    //@{

       ///
   wxString& MakeUpper();
       ///
       ///
   wxString& MakeUpper();
       ///


@@ -349,7 +440,7 @@ public:
       /// truncate string to given length
   wxString& Truncate(size_t uiLen);
     //@}
       /// truncate string to given length
   wxString& Truncate(size_t uiLen);
     //@}

-    
+

     /** @name searching and replacing */
     //@{
       /// searching (return starting index, or -1 if not found)
     /** @name searching and replacing */
     //@{
       /// searching (return starting index, or -1 if not found)


@@ -375,15 +466,21 @@ public:
     /// as vprintf(), returns the number of characters written or < 0 on error
   int PrintfV(const char* pszFormat, va_list argptr);
   //@}
     /// as vprintf(), returns the number of characters written or < 0 on error
   int PrintfV(const char* pszFormat, va_list argptr);
   //@}

-  
+

   /** @name raw access to string memory */
   //@{
   /** @name raw access to string memory */
   //@{

-    /** 
-        get writable buffer of at least nLen bytes. 
+    /// ensure that string has space for at least nLen characters
+    // only works if the data of this string is not shared
+  void Alloc(uint nLen);
+    /// minimize the string's memory
+    // only works if the data of this string is not shared
+  void Shrink();
+    /**
+        get writable buffer of at least nLen bytes.

         Unget() *must* be called a.s.a.p. to put string back in a reasonable
         state!
      */
         Unget() *must* be called a.s.a.p. to put string back in a reasonable
         state!
      */

-  char *GetWriteBuf(int nLen);
+  char *GetWriteBuf(uint nLen);

     /// call this immediately after GetWriteBuf() has been used
   void UngetWriteBuf();
   //@}
     /// call this immediately after GetWriteBuf() has been used
   void UngetWriteBuf();
   //@}


@@ -406,17 +503,20 @@ public:
 
     /// same as Cmp
   inline int CompareTo(const char* psz, caseCompare cmp = exact) const
 
     /// same as Cmp
   inline int CompareTo(const char* psz, caseCompare cmp = exact) const

-  { return cmp == exact ? Cmp(psz) : CmpNoCase(psz); }
+    { return cmp == exact ? Cmp(psz) : CmpNoCase(psz); }

 
     /// same as Mid (substring extraction)
 
     /// same as Mid (substring extraction)

-  inline wxString  operator()(size_t start, size_t len) const { return Mid(start, len); }
+  inline wxString  operator()(size_t start, size_t len) const
+    { return Mid(start, len); }

 
     /// same as += or <<
   inline wxString& Append(const char* psz) { return *this << psz; }
 
     /// same as += or <<
   inline wxString& Append(const char* psz) { return *this << psz; }

-  inline wxString& Append(char ch, int count = 1) { wxString str(ch, count); (*this) += str; return *this; }
+  inline wxString& Append(char ch, int count = 1)
+    { wxString str(ch, count); (*this) += str; return *this; }

 
     ///
 
     ///

-  wxString& Prepend(const wxString& str) { *this = str + *this; return *this; }
+  wxString& Prepend(const wxString& str)
+    { *this = str + *this; return *this; }

     /// same as Len
   size_t Length() const { return Len(); }
     /// same as MakeLower
     /// same as Len
   size_t Length() const { return Len(); }
     /// same as MakeLower


@@ -434,16 +534,16 @@ public:
   wxString& RemoveLast() { return Truncate(Len() - 1); }
 
   // Robert Roebling
   wxString& RemoveLast() { return Truncate(Len() - 1); }
 
   // Robert Roebling

-  
-  wxString& Remove(size_t nStart, size_t nLen) { return erase( nStart, nLen ); }
-  
-  size_t First( const char ch ) const { return find(ch); }
-  size_t First( const char* psz ) const { return find(psz); }
-  size_t First( const wxString &str ) const { return find(str); }
+  wxString& Remove(size_t nStart, size_t nLen)
+    { return erase( nStart, nLen ); }
+
+  int First( const char ch ) const { size_t res = find(ch); return res == wxString::npos ? -1 : res; }
+  int First( const char* psz ) const { size_t res = find(psz); return res == wxString::npos ? -1 : res; }
+  int First( const wxString &str ) const { size_t res =  find(str); return res == wxString::npos ? -1 : res; }

 
 

-  size_t Last( const char ch ) const { return rfind(ch,0); }
-  size_t Last( const char* psz ) const { return rfind(psz,0); }
-  size_t Last( const wxString &str ) const { return rfind(str,0); }
+  int Last( const char ch ) const { size_t res = rfind(ch,0); return res == wxString::npos ? -1 : res; }
+  int Last( const char* psz ) const { size_t res = rfind(psz,0); return res == wxString::npos ? -1 : res; }
+  int Last( const wxString &str ) const { size_t res = rfind(str,0); return res == wxString::npos ? -1 : res; }

 
     /// same as IsEmpty
   bool IsNull() const { return IsEmpty(); }
 
     /// same as IsEmpty
   bool IsNull() const { return IsEmpty(); }


@@ -451,15 +551,19 @@ public:
 
 #ifdef  STD_STRING_COMPATIBILITY
   /** @name std::string compatibility functions */
 
 #ifdef  STD_STRING_COMPATIBILITY
   /** @name std::string compatibility functions */

-  
+

   /// an 'invalid' value for string index
   static const size_t npos;
   /// an 'invalid' value for string index
   static const size_t npos;

-        
+

   //@{
     /** @name constructors */
     //@{
       /// take nLen chars starting at nPos
   //@{
     /** @name constructors */
     //@{
       /// take nLen chars starting at nPos

-      wxString(const wxString& s, size_t nPos, size_t nLen = npos);
+      wxString(const wxString& str, size_t nPos, size_t nLen = npos)
+      { 
+        wxASSERT( str.GetStringData()->IsValid() );
+        InitWith(str.c_str(), nPos, nLen == npos ? 0 : nLen);
+      }

       /// take all characters from pStart to pEnd
       wxString(const void *pStart, const void *pEnd);
     //@}
       /// take all characters from pStart to pEnd
       wxString(const void *pStart, const void *pEnd);
     //@}


@@ -470,7 +574,7 @@ public:
       /// return the length of the string
       size_t length() const { return Len(); }
       /// return the maximum size of the string
       /// return the length of the string
       size_t length() const { return Len(); }
       /// return the maximum size of the string

-      size_t max_size() const { return STRING_MAXLEN; } 
+      size_t max_size() const { return STRING_MAXLEN; }

       /// resize the string, filling the space with c if c != 0
       void resize(size_t nSize, char ch = '\0');
       /// delete the contents of the string
       /// resize the string, filling the space with c if c != 0
       void resize(size_t nSize, char ch = '\0');
       /// delete the contents of the string


@@ -490,58 +594,58 @@ public:
       /** @name append something to the end of this one */
       //@{
         /// append a string
       /** @name append something to the end of this one */
       //@{
         /// append a string

-        wxString& append(const wxString& str) 
+        wxString& append(const wxString& str)

           { *this += str; return *this; }
         /// append elements str[pos], ..., str[pos+n]
           { *this += str; return *this; }
         /// append elements str[pos], ..., str[pos+n]

-        wxString& append(const wxString& str, size_t pos, size_t n) 
+        wxString& append(const wxString& str, size_t pos, size_t n)

           { ConcatSelf(n, str.c_str() + pos); return *this; }
         /// append first n (or all if n == npos) characters of sz
           { ConcatSelf(n, str.c_str() + pos); return *this; }
         /// append first n (or all if n == npos) characters of sz

-        wxString& append(const char *sz, size_t n = npos) 
+        wxString& append(const char *sz, size_t n = npos)

           { ConcatSelf(n == npos ? Strlen(sz) : n, sz); return *this; }
 
         /// append n copies of ch
         wxString& append(size_t n, char ch) { return Pad(n, ch); }
       //@}
           { ConcatSelf(n == npos ? Strlen(sz) : n, sz); return *this; }
 
         /// append n copies of ch
         wxString& append(size_t n, char ch) { return Pad(n, ch); }
       //@}

-        
+

       /** @name replaces the contents of this string with another one */
       //@{
         /// same as `this_string = str'
         wxString& assign(const wxString& str) { return (*this) = str; }
         /// same as ` = str[pos..pos + n]
       /** @name replaces the contents of this string with another one */
       //@{
         /// same as `this_string = str'
         wxString& assign(const wxString& str) { return (*this) = str; }
         /// same as ` = str[pos..pos + n]

-        wxString& assign(const wxString& str, size_t pos, size_t n) 
+        wxString& assign(const wxString& str, size_t pos, size_t n)

           { return *this = wxString((const char *)str + pos, n); }
         /// same as `= first n (or all if n == npos) characters of sz'
           { return *this = wxString((const char *)str + pos, n); }
         /// same as `= first n (or all if n == npos) characters of sz'

-        wxString& assign(const char *sz, size_t n = npos) 
+        wxString& assign(const char *sz, size_t n = npos)

           { return *this = wxString(sz, n); }
         /// same as `= n copies of ch'
           { return *this = wxString(sz, n); }
         /// same as `= n copies of ch'

-        wxString& assign(size_t n, char ch) 
+        wxString& assign(size_t n, char ch)

           { return *this = wxString(ch, n); }
 
       //@}
           { return *this = wxString(ch, n); }
 
       //@}

-        
-      /** @name inserts something at position nPos into this one */  
+
+      /** @name inserts something at position nPos into this one */

       //@{
         /// insert another string
         wxString& insert(size_t nPos, const wxString& str);
         /// insert n chars of str starting at nStart (in str)
         wxString& insert(size_t nPos, const wxString& str, size_t nStart, size_t n)
       //@{
         /// insert another string
         wxString& insert(size_t nPos, const wxString& str);
         /// insert n chars of str starting at nStart (in str)
         wxString& insert(size_t nPos, const wxString& str, size_t nStart, size_t n)

-                   { return insert(nPos, wxString((const char *)str + nStart, n)); }
+          { return insert(nPos, wxString((const char *)str + nStart, n)); }

 
         /// insert first n (or all if n == npos) characters of sz
         wxString& insert(size_t nPos, const char *sz, size_t n = npos)
           { return insert(nPos, wxString(sz, n)); }
         /// insert n copies of ch
 
         /// insert first n (or all if n == npos) characters of sz
         wxString& insert(size_t nPos, const char *sz, size_t n = npos)
           { return insert(nPos, wxString(sz, n)); }
         /// insert n copies of ch

-        wxString& insert(size_t nPos, size_t n, char ch) 
+        wxString& insert(size_t nPos, size_t n, char ch)

           { return insert(nPos, wxString(ch, n)); }
 
       //@}
           { return insert(nPos, wxString(ch, n)); }
 
       //@}

-      
+

       /** @name deletes a part of the string */
       //@{
         /// delete characters from nStart to nStart + nLen
         wxString& erase(size_t nStart = 0, size_t nLen = npos);
       //@}
       /** @name deletes a part of the string */
       //@{
         /// delete characters from nStart to nStart + nLen
         wxString& erase(size_t nStart = 0, size_t nLen = npos);
       //@}

-      
+

       /** @name replaces a substring of this string with another one */
       //@{
          /// replaces the substring of length nLen starting at nStart
       /** @name replaces a substring of this string with another one */
       //@{
          /// replaces the substring of length nLen starting at nStart


@@ -549,14 +653,14 @@ public:
          /// replaces the substring with nCount copies of ch
          wxString& replace(size_t nStart, size_t nLen, size_t nCount, char ch);
          /// replaces a substring with another substring
          /// replaces the substring with nCount copies of ch
          wxString& replace(size_t nStart, size_t nLen, size_t nCount, char ch);
          /// replaces a substring with another substring

-         wxString& replace(size_t nStart, size_t nLen, 
+         wxString& replace(size_t nStart, size_t nLen,

                          const wxString& str, size_t nStart2, size_t nLen2);
          /// replaces the substring with first nCount chars of sz
                          const wxString& str, size_t nStart2, size_t nLen2);
          /// replaces the substring with first nCount chars of sz

-         wxString& replace(size_t nStart, size_t nLen, 
+         wxString& replace(size_t nStart, size_t nLen,

                          const char* sz, size_t nCount);
       //@}
     //@}
                          const char* sz, size_t nCount);
       //@}
     //@}

-         
+

     /// swap two strings
     void swap(wxString& str);
 
     /// swap two strings
     void swap(wxString& str);
 


@@ -564,14 +668,14 @@ public:
     //@{
       /** All find() functions take the nStart argument which specifies
           the position to start the search on, the default value is 0.
     //@{
       /** All find() functions take the nStart argument which specifies
           the position to start the search on, the default value is 0.

-          
+

           All functions return npos if there were no match.
           All functions return npos if there were no match.

-          
-          @name string search 
+
+          @name string search

       */
       //@{
         /**
       */
       //@{
         /**

-            @name find a match for the string/character in this string 
+            @name find a match for the string/character in this string

         */
         //@{
           /// find a substring
         */
         //@{
           /// find a substring


@@ -585,12 +689,12 @@ public:
           /// find the first occurence of character ch after nStart
           size_t find(char ch, size_t nStart = 0) const;
 
           /// find the first occurence of character ch after nStart
           size_t find(char ch, size_t nStart = 0) const;
 

-                 // wxWin compatibility
-                 inline bool Contains(const wxString& str) { return (Find(str) != -1); }
+          // wxWin compatibility
+          inline bool Contains(const wxString& str) { return Find(str) != -1; }

 
         //@}
 
         //@}

-        
-        /** 
+
+        /**

           @name rfind() family is exactly like find() but works right to left
         */
         //@{
           @name rfind() family is exactly like find() but works right to left
         */
         //@{


@@ -599,13 +703,13 @@ public:
         /// as find, but from the end
         // VC++ 1.5 can't cope with this syntax.
 #if ! (defined(_MSC_VER) && !defined(__WIN32__))
         /// as find, but from the end
         // VC++ 1.5 can't cope with this syntax.
 #if ! (defined(_MSC_VER) && !defined(__WIN32__))

-        size_t rfind(const char* sz, size_t nStart = npos, 
+        size_t rfind(const char* sz, size_t nStart = npos,

                      size_t n = npos) const;
         /// as find, but from the end
         size_t rfind(char ch, size_t nStart = npos) const;
 #endif
         //@}
                      size_t n = npos) const;
         /// as find, but from the end
         size_t rfind(char ch, size_t nStart = npos) const;
 #endif
         //@}

-        
+

         /**
           @name find first/last occurence of any character in the set
         */
         /**
           @name find first/last occurence of any character in the set
         */


@@ -616,7 +720,7 @@ public:
           size_t find_first_of(const char* sz, size_t nStart = 0) const;
           /// same as find(char, size_t)
           size_t find_first_of(char c, size_t nStart = 0) const;
           size_t find_first_of(const char* sz, size_t nStart = 0) const;
           /// same as find(char, size_t)
           size_t find_first_of(char c, size_t nStart = 0) const;

-          
+

           ///
           size_t find_last_of (const wxString& str, size_t nStart = npos) const;
           ///
           ///
           size_t find_last_of (const wxString& str, size_t nStart = npos) const;
           ///


@@ -624,7 +728,7 @@ public:
           /// same as rfind(char, size_t)
           size_t find_last_of (char c, size_t nStart = npos) const;
         //@}
           /// same as rfind(char, size_t)
           size_t find_last_of (char c, size_t nStart = npos) const;
         //@}

-        
+

         /**
           @name find first/last occurence of any character not in the set
         */
         /**
           @name find first/last occurence of any character not in the set
         */


@@ -635,7 +739,7 @@ public:
           size_t find_first_not_of(const char* s, size_t nStart = 0) const;
           ///
           size_t find_first_not_of(char ch, size_t nStart = 0) const;
           size_t find_first_not_of(const char* s, size_t nStart = 0) const;
           ///
           size_t find_first_not_of(char ch, size_t nStart = 0) const;

-          
+

           ///
           size_t find_last_not_of(const wxString& str, size_t nStart=npos) const;
           ///
           ///
           size_t find_last_not_of(const wxString& str, size_t nStart=npos) const;
           ///


@@ -644,63 +748,30 @@ public:
           size_t find_last_not_of(char ch, size_t nStart = npos) const;
         //@}
       //@}
           size_t find_last_not_of(char ch, size_t nStart = npos) const;
         //@}
       //@}

-      
-      /** 
-        All compare functions return -1, 0 or 1 if the [sub]string 
+
+      /**
+        All compare functions return -1, 0 or 1 if the [sub]string

         is less, equal or greater than the compare() argument.
         is less, equal or greater than the compare() argument.

-        
+

         @name comparison
       */
       //@{
         /// just like strcmp()
         int compare(const wxString& str) const { return Cmp(str); }
         @name comparison
       */
       //@{
         /// just like strcmp()
         int compare(const wxString& str) const { return Cmp(str); }

-        /// comparaison with a substring
+        /// comparison with a substring

         int compare(size_t nStart, size_t nLen, const wxString& str) const;
         int compare(size_t nStart, size_t nLen, const wxString& str) const;

-        /// comparaison of 2 substrings
+        /// comparison of 2 substrings

         int compare(size_t nStart, size_t nLen,
                     const wxString& str, size_t nStart2, size_t nLen2) const;
         /// just like strcmp()
         int compare(const char* sz) const { return Cmp(sz); }
         int compare(size_t nStart, size_t nLen,
                     const wxString& str, size_t nStart2, size_t nLen2) const;
         /// just like strcmp()
         int compare(const char* sz) const { return Cmp(sz); }

-        /// substring comparaison with first nCount characters of sz
+        /// substring comparison with first nCount characters of sz

         int compare(size_t nStart, size_t nLen,
                     const char* sz, size_t nCount = npos) const;
       //@}
     wxString substr(size_t nStart = 0, size_t nLen = npos) const;
   //@}
 #endif
         int compare(size_t nStart, size_t nLen,
                     const char* sz, size_t nCount = npos) const;
       //@}
     wxString substr(size_t nStart = 0, size_t nLen = npos) const;
   //@}
 #endif

-    
-protected:
-  // points to data preceded by wxStringData structure with ref count info
-  char *m_pchData;
-
-  // accessor to string data
-  wxStringData* GetStringData() const { return (wxStringData*)m_pchData - 1; }
-
-  // string (re)initialization functions
-    // initializes the string to the empty value (must be called only from
-    // ctors, use Reinit() otherwise)
-  void Init() { m_pchData = (char *)g_szNul; }
-    // initializaes the string with (a part of) C-string
-  void InitWith(const char *psz, size_t nPos = 0, size_t nLen = STRING_MAXLEN);
-    // as Init, but also frees old data
-  inline void Reinit(); 
-
-  // memory allocation
-    // allocates memory for string of lenght nLen
-  void AllocBuffer(size_t nLen);
-    // copies data to another string
-  void AllocCopy(wxString&, int, int) const;
-    // effectively copies data to string
-  void AssignCopy(size_t, const char *);
-  
-  // append a (sub)string
-  void ConcatCopy(int nLen1, const char *src1, int nLen2, const char *src2);
-  void ConcatSelf(int nLen, const char *src);
-
-  // functions called before writing to the string: they copy it if there 
-  // other references (should be the only owner when writing)
-  void CopyBeforeWrite();
-  void AllocBeforeWrite(size_t);

 };
 
 // ----------------------------------------------------------------------------
 };
 
 // ----------------------------------------------------------------------------


@@ -710,7 +781,7 @@ protected:
     sizeof(char *)) we store these pointers instead. The cast to "String *"
     is really all we need to turn such pointer into a string!
 
     sizeof(char *)) we store these pointers instead. The cast to "String *"
     is really all we need to turn such pointer into a string!
 

-    Of course, it can be called a dirty hack, but we use twice less memory 
+    Of course, it can be called a dirty hack, but we use twice less memory

     and this approach is also more speed efficient, so it's probably worth it.
 
     Usage notes: when a string is added/inserted, a new copy of it is created,
     and this approach is also more speed efficient, so it's probably worth it.
 
     Usage notes: when a string is added/inserted, a new copy of it is created,


@@ -744,6 +815,8 @@ public:
   void Clear();
     /// preallocates memory for given number of items
   void Alloc(size_t nCount);
   void Clear();
     /// preallocates memory for given number of items
   void Alloc(size_t nCount);

+    /// minimzes the memory usage (by freeing all extra memory)
+  void Shrink();

   //@}
 
   /** @name simple accessors */
   //@}
 
   /** @name simple accessors */


@@ -770,7 +843,7 @@ public:
     /**
       Search the element in the array, starting from the either side
       @param if bFromEnd reverse search direction
     /**
       Search the element in the array, starting from the either side
       @param if bFromEnd reverse search direction

-      @param if bCase, comparaison is case sensitive (default)
+      @param if bCase, comparison is case sensitive (default)

       @return index of the first item matched or NOT_FOUND
       @see NOT_FOUND
      */
       @return index of the first item matched or NOT_FOUND
       @see NOT_FOUND
      */


@@ -799,14 +872,8 @@ private:
 };
 
 // ---------------------------------------------------------------------------
 };
 
 // ---------------------------------------------------------------------------

-// implementation of inline functions
-// ---------------------------------------------------------------------------
-
-// Put back into class, since BC++ can't create precompiled header otherwise
-
-// ---------------------------------------------------------------------------
-/** @name wxString comparaison functions 
-    @memo Comparaisons are case sensitive
+/** @name wxString comparison functions
+    @memo Comparisons are case sensitive

  */
 // ---------------------------------------------------------------------------
 //@{
  */
 // ---------------------------------------------------------------------------
 //@{


@@ -848,7 +915,7 @@ inline bool operator>=(const char  * s1, const wxString& s2) { return s2.Cmp(s1)
 //@}
 
 // ---------------------------------------------------------------------------
 //@}
 
 // ---------------------------------------------------------------------------

-/** @name Global functions complementing standard C string library 
+/** @name Global functions complementing standard C string library

     @memo replacements for strlen() and portable strcasecmp()
  */
 // ---------------------------------------------------------------------------
     @memo replacements for strlen() and portable strcasecmp()
  */
 // ---------------------------------------------------------------------------