FString internally changed from wchar_t* to std::wstring

ChangeLog

@@ -1,3 +1,6 @@
+2021-05-30 Markus Gans  <guru.mail@muenster.de>
+	* FString internally changed from wchar_t* to std::wstring
+
 2021-05-24 Markus Gans  <guru.mail@muenster.de>
 	* Using std::string for the attribute buffer
 

examples/calculator.cpp

@@ -385,7 +385,7 @@ void Calc::drawDispay()
 {
   finalcut::FString display{input};
 
-  if ( display.isNull() || display.isEmpty()  )
+  if ( display.isEmpty() )
     display = L'0';
 
   if ( display.right(3) == L"-0." )
@@ -651,7 +651,6 @@ void Calc::radix_point (const lDouble&)
     return;
 
   if ( isDataEntryKey(last_key)
-    && ! input.isNull()
     && ! input.isEmpty()
     && ! input.includes('.') )
     input += '.';

examples/ui.cpp

@@ -1013,7 +1013,7 @@ void MyDialog::cb_view (const finalcut::FMenuItem* item)
   else
     file = finalcut::FFileDialog::fileOpenChooser (this);
 
-  if ( file.isNull() )
+  if ( file.isEmpty() )
     return;
 
   const auto& view = new TextWindow(this);

src/fbutton.cpp

@@ -3,7 +3,7 @@
 *                                                                      *
 * This file is part of the FINAL CUT widget toolkit                    *
 *                                                                      *
-* Copyright 2012-2020 Markus Gans                                      *
+* Copyright 2012-2021 Markus Gans                                      *
 *                                                                      *
 * FINAL CUT is free software; you can redistribute it and/or modify    *
 * it under the terms of the GNU Lesser General Public License as       *
@@ -209,11 +209,7 @@ bool FButton::setDown (bool enable)
 //----------------------------------------------------------------------
 void FButton::setText (const FString& txt)
 {
-  if ( txt.isNull() )
+  text.setString(txt);
-    text.setString("");
-  else
-    text.setString(txt);
-
   detectHotkey();
 }
 

src/fbuttongroup.cpp

@@ -361,7 +361,7 @@ void FButtonGroup::draw()
 //----------------------------------------------------------------------
 void FButtonGroup::drawLabel()
 {
-  if ( text.isNull() || text.isEmpty() )
+  if ( text.isEmpty() )
     return;
 
   FString label_text{};

src/ffiledialog.cpp

@@ -65,15 +65,15 @@ FString fileChooser ( FWidget* parent
   FString path{dirname};
   FString file_filter{filter};
 
-  if ( path.isNull() || path.isEmpty() )
+  if ( path.isEmpty() )
   {
     path.setString(FFileDialog::getHomeDir());
 
-    if ( path.isNull() || path.isEmpty() )
+    if ( path.isEmpty() )
       path.setString("/");
   }
 
-  if ( file_filter.isNull() || file_filter.isEmpty() )
+  if ( file_filter.isEmpty() )
     file_filter.setString("*");
 
   FFileDialog fileopen ( path
@@ -111,7 +111,7 @@ FFileDialog::FFileDialog ( const FString& dirname
   , filter_pattern{filter}
   , dlg_type{type}
 {
-  if ( ! dirname.isNull() )
+  if ( ! dirname.isEmpty() )
     setPath(dirname);
 
   init();
@@ -728,7 +728,7 @@ void FFileDialog::cb_processActivate()
                             {
                               return ! entry.name.empty()
                                   && input
-                                  && ! input.isNull()
+                                  && ! input.isEmpty()
                                   && std::strcmp(entry.name.c_str(), input.c_str()) == 0
                                   && entry.directory;
                             }

src/fkeyboard.cpp

@@ -398,7 +398,7 @@ inline bool FKeyboard::isKeypressTimeout()
 //----------------------------------------------------------------------
 FKey FKeyboard::UTF8decode (const std::string& utf8) const
 {
-  using distance_type = std::iterator_traits<std::string::iterator>::difference_type;
+  using distance_type = std::string::difference_type;
   FKey ucs{FKey::None};  // Universal coded character
   constexpr std::size_t max = 4;
   const auto len = utf8.length();

src/flistbox.cpp

@@ -749,7 +749,7 @@ void FListBox::drawScrollbars() const
 //----------------------------------------------------------------------
 void FListBox::drawHeadline()
 {
-  if ( text.isNull() || text.isEmpty() )
+  if ( text.isEmpty() )
     return;
 
   const FString txt{" " + text + " "};
@@ -1678,7 +1678,7 @@ void FListBox::changeOnResize() const
 //----------------------------------------------------------------------
 void FListBox::lazyConvert(FListBoxItems::iterator iter, std::size_t y)
 {
-  if ( conv_type != ConvertType::Lazy || ! iter->getText().isNull() )
+  if ( conv_type != ConvertType::Lazy || ! iter->getText().isEmpty() )
     return;
 
   lazy_inserter (*iter, source_container, y + std::size_t(yoffset));

src/fmessagebox.cpp

@@ -281,7 +281,7 @@ void FMessageBox::calculateDimensions()
   if ( text_num_lines == 0 )
     return;
 
-  if ( ! headline_text.isNull() )
+  if ( ! headline_text.isEmpty() )
     headline_height = 2;
 
   for (auto&& line : text_components)

src/foptimove.cpp

@@ -604,9 +604,9 @@ int FOptiMove::capDurationToLength (int duration) const
 }
 
 //----------------------------------------------------------------------
-int FOptiMove::repeatedAppend ( const Capability& o
+int FOptiMove::repeatedAppend ( std::string& dst
-                              , int count
+                              , const Capability& o
-                              , std::string& dst ) const
+                              , int count ) const
 {
   const std::size_t src_len = std::strlen(o.cap);
   const std::size_t dst_len = dst.length();
@@ -702,7 +702,7 @@ inline void FOptiMove::downMove ( std::string& move, int& vtime
     if ( ! move.empty() )
       move.clear();
 
-    vtime = repeatedAppend (F_cursor_down, num, move);
+    vtime = repeatedAppend (move, F_cursor_down, num);
   }
 }
 
@@ -723,7 +723,7 @@ inline void FOptiMove::upMove ( std::string& move, int& vtime
     if ( ! move.empty() )
       move.clear();
 
-    vtime = repeatedAppend (F_cursor_up, num, move);
+    vtime = repeatedAppend (move, F_cursor_up, num);
   }
 }
 
@@ -737,7 +737,6 @@ inline int FOptiMove::horizontalMove (std::string& hmove, int from_x, int to_x)
     // Move to fixed column position
     hmove = FTermcap::encodeParameter(F_column_address.cap, to_x);
     htime = F_column_address.duration;
-
   }
 
   if ( to_x > from_x )
@@ -777,7 +776,7 @@ inline void FOptiMove::rightMove ( std::string& hmove, int& htime
         if ( tab_pos > to_x )
           break;
 
-        htime_r += repeatedAppend (F_tab, 1, str);
+        htime_r += repeatedAppend (str, F_tab, 1);
 
         if ( htime_r >= LONG_DURATION )
           break;
@@ -788,7 +787,7 @@ inline void FOptiMove::rightMove ( std::string& hmove, int& htime
       num = to_x - pos;
     }
 
-    htime_r += repeatedAppend (F_cursor_right, num, str);
+    htime_r += repeatedAppend (str, F_cursor_right, num);
 
     if ( htime_r < htime )
     {
@@ -827,7 +826,7 @@ inline void FOptiMove::leftMove ( std::string& hmove, int& htime
         if ( tab_pos < to_x )
           break;
 
-        htime_l += repeatedAppend (F_back_tab, 1, str);
+        htime_l += repeatedAppend (str, F_back_tab, 1);
 
         if ( htime_l >= LONG_DURATION )
           break;
@@ -838,11 +837,10 @@ inline void FOptiMove::leftMove ( std::string& hmove, int& htime
       num = pos - to_x;
     }
 
-    htime_l += repeatedAppend (F_cursor_left, num, str);
+    htime_l += repeatedAppend (str, F_cursor_left, num);
 
     if ( htime_l < htime )
     {
-
       hmove = str;
       htime = htime_l;
     }

src/fterm_functions.cpp

@@ -199,9 +199,9 @@ constexpr std::array<UniChar, 20> reverse_newfont_list =
 
 // FTerm non-member functions
 //----------------------------------------------------------------------
-uInt env2uint (const char* env)
+uInt env2uint (const std::string& env)
 {
-  const FString str{getenv(env)};
+  const FString str{getenv(env.data())};
 
   if ( str.isEmpty() )
     return 0;

src/ftermbuffer.cpp

@@ -66,7 +66,6 @@ FString FTermBuffer::toString() const
 //----------------------------------------------------------------------
 int FTermBuffer::write (const FString& string)
 {
-  assert ( ! string.isNull() );
   data.reserve(data.size() + string.getLength());
   const auto last = string.end();
   auto begin = string.begin();

src/ftermxterminal.cpp

@@ -345,10 +345,6 @@ void FTermXTerminal::setXTermTitle()
     || FTermcap::osc_support )
   {
     oscPrefix();
-
-    if ( xterm_title.isNull() )
-      xterm_title = "";
-
     FTerm::putstringf (OSC "0;%s" BEL, xterm_title.c_str());
     oscPostfix();
     std::fflush(stdout);

src/ftextview.cpp

@@ -280,9 +280,7 @@ void FTextView::replaceRange (const FString& str, int from, int to)
 
   auto iter = data.begin();
   data.erase (iter + from, iter + to + 1);
-
+  insert(str, from);
-  if ( ! str.isNull() )
-    insert(str, from);
 }
 
 //----------------------------------------------------------------------

src/ftogglebutton.cpp

@@ -3,7 +3,7 @@
 *                                                                      *
 * This file is part of the FINAL CUT widget toolkit                    *
 *                                                                      *
-* Copyright 2014-2020 Markus Gans                                      *
+* Copyright 2014-2021 Markus Gans                                      *
 *                                                                      *
 * FINAL CUT is free software; you can redistribute it and/or modify    *
 * it under the terms of the GNU Lesser General Public License as       *
@@ -383,7 +383,7 @@ void FToggleButton::draw()
 //----------------------------------------------------------------------
 void FToggleButton::drawLabel()
 {
-  if ( text.isNull() || text.isEmpty() )
+  if ( text.isEmpty() )
     return;
 
   const FString txt(text);

src/fvterm.cpp

@@ -342,8 +342,8 @@ void FVTerm::delPreprocessingHandler (const FVTerm* instance)
 //----------------------------------------------------------------------
 int FVTerm::print (const FString& string)
 {
-  if ( string.isNull() )
+  if ( string.isEmpty() )
-    return -1;
+    return 0;
 
   FTermBuffer term_buffer{};
   term_buffer.write(string);
@@ -353,7 +353,7 @@ int FVTerm::print (const FString& string)
 //----------------------------------------------------------------------
 int FVTerm::print (FTermArea* area, const FString& string)
 {
-  if ( ! area || string.isNull() )
+  if ( ! area || string.isEmpty() )
     return -1;
 
   FTermBuffer term_buffer{};

src/include/final/foptimove.h

@@ -167,7 +167,7 @@ class FOptiMove final
     void          calculateCharDuration();
     int           capDuration (const char[], int) const;
     int           capDurationToLength (int) const;
-    int           repeatedAppend (const Capability&, int, std::string&) const;
+    int           repeatedAppend (std::string&, const Capability&, int) const;
     int           relativeMove (std::string&, int, int, int, int) const;
     int           verticalMove (std::string&, int, int) const;
     void          downMove (std::string&, int&, int, int) const;

src/include/final/fstring.h

@@ -80,10 +80,11 @@ class FString
 {
   public:
     // Using-declarations
-    using iterator        = wchar_t*;
+    using iterator        = std::wstring::iterator;
-    using const_iterator  = const wchar_t*;
+    using const_iterator  = std::wstring::const_iterator;
-    using reference       = wchar_t&;
+    using reference       = std::wstring::reference;
-    using const_reference = const wchar_t&;
+    using const_reference = std::wstring::const_reference;
+    using difference_type = std::wstring::difference_type;
 
     // Constructors
     FString () = default;
@@ -167,7 +168,7 @@ class FString
     virtual FString getClassName() const;
 
     // inquiries
-    bool isNull() const noexcept;
+    bool isNull() const noexcept;  // deprecated
     bool isEmpty() const noexcept;
 
     // Methods
@@ -245,24 +246,17 @@ class FString
 
   private:
     // Constants
-    static constexpr uInt FWDBUFFER = 15;
     static constexpr uInt INPBUFFER = 200;
 
     // Methods
-    void           _initLength (std::size_t);
+    void               _assign (const std::wstring&);
-    void           _assign (const wchar_t[]);
+    std::string        _toCharString (const std::wstring&) const;
-    void           _insert (std::size_t, const wchar_t[]);
+    std::wstring       _toWideString (const std::string&) const;
-    void           _insert (std::size_t, std::size_t, const wchar_t[]);
+    const wchar_t*     _extractToken (wchar_t*[], const wchar_t[], const wchar_t[]) const;
-    void           _remove (std::size_t, std::size_t);
-    const char*    _to_cstring (const wchar_t[]) const;
-    const wchar_t* _to_wcstring (const char[]) const;
-    const wchar_t* _extractToken (wchar_t*[], const wchar_t[], const wchar_t[]) const;
 
     // Data members
-    wchar_t*             string{nullptr};
+    std::wstring         string{};
-    std::size_t          length{0};
+    mutable std::string  char_string{};
-    std::size_t          bufsize{0};
-    mutable char*        c_string{nullptr};
     static wchar_t       null_char;
     static const wchar_t const_null_char;
 
@@ -288,7 +282,7 @@ template <typename NumT
 inline FString& FString::operator << (const NumT val)
 {
   const FString numstr(FString().setNumber(val));
-  _insert (length, numstr.length, numstr.string);
+  string.append(numstr.string);
   return *this;
 }
 
@@ -296,10 +290,10 @@ inline FString& FString::operator << (const NumT val)
 template <typename IndexT>
 inline FString::reference FString::operator [] (const IndexT pos)
 {
-  if ( isNegative(pos) || pos > IndexT(length) )
+  if ( isNegative(pos) || pos > IndexT(string.length()) )
     throw std::out_of_range("");  // Invalid index position
 
-  if ( std::size_t(pos) == length )
+  if ( std::size_t(pos) == string.length() )
     return null_char;
 
   return string[std::size_t(pos)];
@@ -309,10 +303,10 @@ inline FString::reference FString::operator [] (const IndexT pos)
 template <typename IndexT>
 inline FString::const_reference FString::operator [] (const IndexT pos) const
 {
-  if ( isNegative(pos) || pos > IndexT(length) )
+  if ( isNegative(pos) || pos > IndexT(string.length()) )
     throw std::out_of_range("");  // Invalid index position
 
-  if ( std::size_t(pos) == length )
+  if ( std::size_t(pos) == string.length() )
     return const_null_char;
 
   return string[std::size_t(pos)];
@@ -371,63 +365,63 @@ inline FString FString::getClassName() const
 { return "FString"; }
 
 //----------------------------------------------------------------------
-inline bool FString::isNull() const noexcept
+inline bool FString::isNull() const noexcept  // deprecated
-{ return ( bufsize == 0 || (bufsize > 0 && ! string) ); }
+{ return false; }
 
 //----------------------------------------------------------------------
 inline bool FString::isEmpty() const noexcept
-{ return ( length == 0 || (length > 0 && string[0] == L'\0') ); }
+{ return string.empty(); }
 
 //----------------------------------------------------------------------
 inline std::size_t FString::getLength() const noexcept
-{ return length; }
+{ return string.length(); }
 
 //----------------------------------------------------------------------
 inline std::size_t FString::capacity() const noexcept
-{ return ( length > 0 ) ? bufsize - 1 : 0; }
+{ return string.capacity(); }
 
 //----------------------------------------------------------------------
 inline FString::iterator FString::begin() noexcept
-{ return string; }
+{ return string.begin(); }
 
 //----------------------------------------------------------------------
 inline FString::iterator FString::end() noexcept
-{ return string + length; }
+{ return string.end(); }
 
 //----------------------------------------------------------------------
 inline FString::const_iterator FString::begin() const noexcept
-{ return string; }
+{ return string.cbegin(); }
 
 //----------------------------------------------------------------------
 inline FString::const_iterator FString::end() const noexcept
-{ return string + length; }
+{ return string.cend(); }
 
 //----------------------------------------------------------------------
 inline FString::reference FString::front()
 {
   assert ( ! isEmpty() );
-  return (*this)[0];
+  return string.front();
 }
 
 //----------------------------------------------------------------------
 inline FString::reference FString::back()
 {
   assert( ! isEmpty() );
-  return (*this)[length - 1];
+  return string.back();
 }
 
 //----------------------------------------------------------------------
 inline FString::const_reference FString::front() const
 {
   assert ( ! isEmpty() );
-  return (*this)[0];
+  return string.front();
 }
 
 //----------------------------------------------------------------------
 inline FString::const_reference FString::back() const
 {
   assert( ! isEmpty() );
-  return (*this)[length - 1];
+  return string.back();
 }
 
 //----------------------------------------------------------------------

src/include/final/fterm.h

@@ -367,7 +367,7 @@ class FTerm final
 // non-member function forward declarations
 // implemented in fterm_functions.cpp
 //----------------------------------------------------------------------
-uInt env2uint (const char*);
+uInt env2uint (const std::string&);
 bool isReverseNewFontchar (wchar_t);
 bool hasFullWidthSupports();
 wchar_t cp437_to_unicode (uChar);

test/fstring-test.cpp

@@ -3,7 +3,7 @@
 *                                                                      *
 * This file is part of the FINAL CUT widget toolkit                    *
 *                                                                      *
-* Copyright 2018-2020 Markus Gans                                      *
+* Copyright 2018-2021 Markus Gans                                      *
 *                                                                      *
 * FINAL CUT is free software; you can redistribute it and/or modify    *
 * it under the terms of the GNU Lesser General Public License as       *
@@ -158,12 +158,11 @@ void FStringTest::classNameTest()
 void FStringTest::noArgumentTest()
 {
   finalcut::FString empty;
-  CPPUNIT_ASSERT ( empty.isNull() );
   CPPUNIT_ASSERT ( empty.isEmpty() );
   CPPUNIT_ASSERT ( empty.getLength() == 0 );
-  CPPUNIT_ASSERT ( empty.capacity() == 0 );
+  CPPUNIT_ASSERT ( empty.capacity() < std::wstring().max_size() );
-  CPPUNIT_ASSERT ( empty.wc_str() == nullptr );
+  CPPUNIT_ASSERT ( empty.wc_str()[0] == L'\0' );
-  CPPUNIT_ASSERT ( empty.c_str() == nullptr );
+  CPPUNIT_ASSERT ( empty.c_str()[0] == '\0' );
   CPPUNIT_ASSERT_EQUAL ( empty.toString(), std::string() );
   CPPUNIT_ASSERT ( strlen(finalcut::FString(99).c_str()) == 0 );
   CPPUNIT_ASSERT ( wcslen(finalcut::FString(99).wc_str()) == 0 );
@@ -171,17 +170,16 @@ void FStringTest::noArgumentTest()
   CPPUNIT_ASSERT ( wcslen(finalcut::FString("").wc_str()) == 0 );
 
   char* cstr = empty.c_str();
-  CPPUNIT_ASSERT ( cstr == nullptr );
+  CPPUNIT_ASSERT ( cstr[0] == '\0' );
   wchar_t* wcstr = empty.wc_str();
-  CPPUNIT_ASSERT ( wcstr == nullptr );
+  CPPUNIT_ASSERT ( wcstr[0] == L'\0' );
   std::string str = empty.toString();
   CPPUNIT_ASSERT ( str.length() == 0 );
   CPPUNIT_ASSERT ( str.size() == 0 );
   CPPUNIT_ASSERT ( str.empty() );
   const finalcut::FString fstr = str;
-  CPPUNIT_ASSERT ( fstr.isNull() );
   CPPUNIT_ASSERT ( fstr.isEmpty() );
-  CPPUNIT_ASSERT ( fstr.capacity() == 0 );
+  CPPUNIT_ASSERT ( fstr.capacity() < std::wstring().max_size() );
 
   cstr = 0;
   CPPUNIT_ASSERT ( empty == cstr );
@@ -209,7 +207,7 @@ void FStringTest::noArgumentTest()
   CPPUNIT_ASSERT_EQUAL ( empty, finalcut::FString(L"123") );
 
   empty.clear();
-  CPPUNIT_ASSERT ( empty.isNull() );
+  CPPUNIT_ASSERT ( empty.isEmpty() );
 }
 
 //----------------------------------------------------------------------
@@ -217,70 +215,60 @@ void FStringTest::initLengthTest()
 {
   const finalcut::FString s1(0);
   CPPUNIT_ASSERT ( s1.getLength() == 0 );
-  CPPUNIT_ASSERT ( s1.capacity() == 0 );
+  CPPUNIT_ASSERT ( s1.capacity() < std::wstring().max_size() );
-  CPPUNIT_ASSERT ( s1.isNull() );
   CPPUNIT_ASSERT ( s1.isEmpty() );
 
   constexpr int         x1 = 10;
   constexpr std::size_t x2 = 10;
   const finalcut::FString s2(x1);
   CPPUNIT_ASSERT ( s2.getLength() == 10 );
-  CPPUNIT_ASSERT ( s2.capacity() == 25 );
+  CPPUNIT_ASSERT ( s2.capacity() >= 10 );
-  CPPUNIT_ASSERT ( ! s2.isNull() );
+  CPPUNIT_ASSERT ( ! s2.isEmpty() );
-  CPPUNIT_ASSERT ( s2.isEmpty() );
 
   const finalcut::FString s3(x2);
   CPPUNIT_ASSERT ( s3.getLength() == 10 );
-  CPPUNIT_ASSERT ( s3.capacity() == 25 );
+  CPPUNIT_ASSERT ( s3.capacity() >= 10 );
-  CPPUNIT_ASSERT ( ! s3.isNull() );
+  CPPUNIT_ASSERT ( ! s3.isEmpty() );
-  CPPUNIT_ASSERT ( s3.isEmpty() );
 
   const finalcut::FString s4(0, L'-');
   CPPUNIT_ASSERT ( s4.getLength() == 0 );
-  CPPUNIT_ASSERT ( s4.capacity() == 0 );
+  CPPUNIT_ASSERT ( s4.capacity() < std::wstring().max_size() );
-  CPPUNIT_ASSERT ( s4.isNull() );
   CPPUNIT_ASSERT ( s4.isEmpty() );
 
   const finalcut::FString s5(0, '-');
   CPPUNIT_ASSERT ( s5.getLength() == 0 );
-  CPPUNIT_ASSERT ( s5.capacity() == 0 );
+  CPPUNIT_ASSERT ( s5.capacity() < std::wstring().max_size() );
-  CPPUNIT_ASSERT ( s5.isNull() );
   CPPUNIT_ASSERT ( s5.isEmpty() );
 
   const finalcut::FString s6(0, char(0));
   CPPUNIT_ASSERT ( s6.getLength() == 0 );
-  CPPUNIT_ASSERT ( s6.capacity() == 0 );
+  CPPUNIT_ASSERT ( s6.capacity() < std::wstring().max_size() );
-  CPPUNIT_ASSERT ( s6.isNull() );
   CPPUNIT_ASSERT ( s6.isEmpty() );
 
   const finalcut::FString s7(x1, '-');
   CPPUNIT_ASSERT ( s7.getLength() == 10 );
-  CPPUNIT_ASSERT ( ! s7.isNull() );
+  CPPUNIT_ASSERT ( s7.capacity() >= 10 );
   CPPUNIT_ASSERT ( ! s7.isEmpty() );
 
   const finalcut::FString s8(x2, '-');
   CPPUNIT_ASSERT ( s8.getLength() == 10 );
-  CPPUNIT_ASSERT ( s8.capacity() == 25 );
+  CPPUNIT_ASSERT ( s8.capacity() >= 10 );
-  CPPUNIT_ASSERT ( ! s8.isNull() );
   CPPUNIT_ASSERT ( ! s8.isEmpty() );
 
   const finalcut::FString s9(x1, L'-');
   CPPUNIT_ASSERT ( s9.getLength() == 10 );
-  CPPUNIT_ASSERT ( s9.capacity() == 25 );
+  CPPUNIT_ASSERT ( s9.capacity() >= 10 );
-  CPPUNIT_ASSERT ( ! s9.isNull() );
   CPPUNIT_ASSERT ( ! s9.isEmpty() );
 
   const finalcut::FString s10(x2, L'-');
   CPPUNIT_ASSERT ( s10.getLength() == 10 );
-  CPPUNIT_ASSERT ( s10.capacity() == 25 );
+  CPPUNIT_ASSERT ( s10.capacity() >= 10 );
-  CPPUNIT_ASSERT ( ! s10.isNull() );
   CPPUNIT_ASSERT ( ! s10.isEmpty() );
 
   const finalcut::FString s11(x2, wchar_t(0));
   CPPUNIT_ASSERT ( s11.getLength() == 10 );
-  CPPUNIT_ASSERT ( s11.capacity() == 25 );
+  CPPUNIT_ASSERT ( s11.capacity() >= 10 );
-  CPPUNIT_ASSERT ( ! s11.isNull() );
+  CPPUNIT_ASSERT ( ! s11.isEmpty() );
-  CPPUNIT_ASSERT ( s11.isEmpty() );
 }
 
 //----------------------------------------------------------------------
@@ -290,7 +278,7 @@ void FStringTest::copyConstructorTest()
   const finalcut::FString s2(s1);
   CPPUNIT_ASSERT ( s2 == L"abc" );
   CPPUNIT_ASSERT ( s2.getLength() == 3 );
-  CPPUNIT_ASSERT ( s2.capacity() == 18 );
+  CPPUNIT_ASSERT ( s2.capacity() >= 3 );
 }
 
 //----------------------------------------------------------------------
@@ -300,11 +288,10 @@ void FStringTest::moveConstructorTest()
   const finalcut::FString s2{std::move(s1)};
   CPPUNIT_ASSERT ( s2 == L"abc" );
   CPPUNIT_ASSERT ( s2.getLength() == 3 );
-  CPPUNIT_ASSERT ( s2.capacity() == 18 );
+  CPPUNIT_ASSERT ( s2.capacity() >= 3 );
-  CPPUNIT_ASSERT ( s1.isNull() );
   CPPUNIT_ASSERT ( s1.isEmpty() );
   CPPUNIT_ASSERT ( s1.getLength() == 0 );
-  CPPUNIT_ASSERT ( s1.capacity() == 0 );
+  CPPUNIT_ASSERT ( s1.capacity() < std::wstring().max_size() );
 }
 
 //----------------------------------------------------------------------
@@ -313,37 +300,30 @@ void FStringTest::assignmentTest()
   finalcut::FString s1;
   s1 = static_cast<finalcut::FString>(0);
   CPPUNIT_ASSERT ( ! s1 );
-  CPPUNIT_ASSERT ( s1.isNull() );
   CPPUNIT_ASSERT ( s1.isEmpty() );
 
   s1 = std::wstring();
   CPPUNIT_ASSERT ( ! s1 );
-  CPPUNIT_ASSERT ( s1.isNull() );
   CPPUNIT_ASSERT ( s1.isEmpty() );
 
   s1 = std::string();
   CPPUNIT_ASSERT ( ! s1 );
-  CPPUNIT_ASSERT ( s1.isNull() );
   CPPUNIT_ASSERT ( s1.isEmpty() );
 
   s1 = static_cast<wchar_t*>(0);
   CPPUNIT_ASSERT ( ! s1 );
-  CPPUNIT_ASSERT ( s1.isNull() );
   CPPUNIT_ASSERT ( s1.isEmpty() );
 
   s1 = static_cast<char*>(0);
   CPPUNIT_ASSERT ( ! s1 );
-  CPPUNIT_ASSERT ( s1.isNull() );
   CPPUNIT_ASSERT ( s1.isEmpty() );
 
   s1 = wchar_t(0);
   CPPUNIT_ASSERT ( ! s1 );
-  CPPUNIT_ASSERT ( s1.isNull() );
   CPPUNIT_ASSERT ( s1.isEmpty() );
 
   s1 = char(0);
   CPPUNIT_ASSERT ( ! s1 );
-  CPPUNIT_ASSERT ( s1.isNull() );
   CPPUNIT_ASSERT ( s1.isEmpty() );
 
   const finalcut::FString s2("abc");
@@ -351,49 +331,49 @@ void FStringTest::assignmentTest()
   CPPUNIT_ASSERT ( s1 );
   CPPUNIT_ASSERT ( s1 == L"abc" );
   CPPUNIT_ASSERT ( s1.getLength() == 3 );
-  CPPUNIT_ASSERT ( s1.capacity() == 18 );
+  CPPUNIT_ASSERT ( s1.capacity() >= 3 );
 
   const std::wstring s3(L"def");
   s1 = s3;
   CPPUNIT_ASSERT ( s1 );
   CPPUNIT_ASSERT ( s1 == L"def" );
   CPPUNIT_ASSERT ( s1.getLength() == 3 );
-  CPPUNIT_ASSERT ( s1.capacity() == 18 );
+  CPPUNIT_ASSERT ( s1.capacity() >= 3 );
 
   const std::string s4("ghi");
   s1 = s4;
   CPPUNIT_ASSERT ( s1 );
   CPPUNIT_ASSERT ( s1 == L"ghi" );
   CPPUNIT_ASSERT ( s1.getLength() == 3 );
-  CPPUNIT_ASSERT ( s1.capacity() == 18 );
+  CPPUNIT_ASSERT ( s1.capacity() >= 3 );
 
   constexpr wchar_t s5[] = L"abc";
   s1 = s5;
   CPPUNIT_ASSERT ( s1 );
   CPPUNIT_ASSERT ( s1 == L"abc" );
   CPPUNIT_ASSERT ( s1.getLength() == 3 );
-  CPPUNIT_ASSERT ( s1.capacity() == 18 );
+  CPPUNIT_ASSERT ( s1.capacity() >= 3 );
 
   constexpr char s6[] = "def";
   s1 = s6;
   CPPUNIT_ASSERT ( s1 );
   CPPUNIT_ASSERT ( s1 == L"def" );
   CPPUNIT_ASSERT ( s1.getLength() == 3 );
-  CPPUNIT_ASSERT ( s1.capacity() == 18 );
+  CPPUNIT_ASSERT ( s1.capacity() >= 3 );
 
   constexpr wchar_t s7 = L'#';
   s1 = s7;
   CPPUNIT_ASSERT ( s1 );
   CPPUNIT_ASSERT ( s1 == L"#" );
   CPPUNIT_ASSERT ( s1.getLength() == 1 );
-  CPPUNIT_ASSERT ( s1.capacity() == 16 );
+  CPPUNIT_ASSERT ( s1.capacity() >= 1 );
 
   constexpr char s8 = '%';
   s1 = s8;
   CPPUNIT_ASSERT ( s1 );
   CPPUNIT_ASSERT ( s1 == L"%" );
   CPPUNIT_ASSERT ( s1.getLength() == 1 );
-  CPPUNIT_ASSERT ( s1.capacity() == 16 );
+  CPPUNIT_ASSERT ( s1.capacity() >= 1 );
 
   s1.setString("A character string");
   CPPUNIT_ASSERT ( s1 );
@@ -407,10 +387,10 @@ void FStringTest::assignmentTest()
   CPPUNIT_ASSERT ( s1 == L"A wide character string" );
 
   s1.setString("");
-  CPPUNIT_ASSERT ( s1 );
+  CPPUNIT_ASSERT ( ! s1 );
 
   s1.setString(L"");
-  CPPUNIT_ASSERT ( s1 );
+  CPPUNIT_ASSERT ( ! s1 );
 
   s1.setString("");
   CPPUNIT_ASSERT ( s1 == "" );
@@ -425,28 +405,25 @@ void FStringTest::assignmentTest()
   CPPUNIT_ASSERT ( s1.isEmpty() );
 
   s1.setString("");
-  CPPUNIT_ASSERT ( ! s1.isNull() );
+  CPPUNIT_ASSERT ( s1.isEmpty() );
 
   s1.setString(L"");
-  CPPUNIT_ASSERT ( ! s1.isNull() );
+  CPPUNIT_ASSERT ( s1.isEmpty() );
 
   constexpr wchar_t* wc = 0;
   s1.setString(wc);
   CPPUNIT_ASSERT ( s1.isEmpty() );
-  CPPUNIT_ASSERT ( s1.isNull() );
   CPPUNIT_ASSERT ( ! s1 );
 
   constexpr char* c = 0;
   s1.setString(c);
   CPPUNIT_ASSERT ( s1.isEmpty() );
-  CPPUNIT_ASSERT ( s1.isNull() );
   CPPUNIT_ASSERT ( ! s1 );
 
   // Move assignment operator
   auto empty = finalcut::FString(0);
   const finalcut::FString s9 = std::move(empty);
   CPPUNIT_ASSERT ( ! s9 );
-  CPPUNIT_ASSERT ( s9.isNull() );
   CPPUNIT_ASSERT ( s9.isEmpty() );
 
   finalcut::FString s10("abc");
@@ -454,11 +431,10 @@ void FStringTest::assignmentTest()
   CPPUNIT_ASSERT ( s11 );
   CPPUNIT_ASSERT ( s11 == L"abc" );
   CPPUNIT_ASSERT ( s11.getLength() == 3 );
-  CPPUNIT_ASSERT ( s11.capacity() == 18 );
+  CPPUNIT_ASSERT ( s11.capacity() >= 3 );
-  CPPUNIT_ASSERT ( s10.isNull() );
   CPPUNIT_ASSERT ( s10.isEmpty() );
   CPPUNIT_ASSERT ( s10.getLength() == 0 );
-  CPPUNIT_ASSERT ( s10.capacity() == 0 );
+  CPPUNIT_ASSERT ( s10.capacity() < std::wstring().max_size() );
 }
 
 //----------------------------------------------------------------------
@@ -475,7 +451,6 @@ void FStringTest::additionAssignmentTest()
   CPPUNIT_ASSERT ( s1 == L"abcdef" );
 
   s1.clear();
-  CPPUNIT_ASSERT ( s1.isNull() );
   CPPUNIT_ASSERT ( s1.isEmpty() );
   s1 += std::wstring(L"abc");
   CPPUNIT_ASSERT ( s1 == L"abc" );
@@ -545,8 +520,8 @@ void FStringTest::additionTest()
   // Empty const finalcut::FString + ...
   const finalcut::FString s3;
   CPPUNIT_ASSERT ( s3.getLength() == 0 );
-  CPPUNIT_ASSERT ( s3.c_str() == nullptr );
+  CPPUNIT_ASSERT ( s3.c_str()[0] == '\0' );
-  CPPUNIT_ASSERT ( s3.wc_str() == nullptr );
+  CPPUNIT_ASSERT ( s3.wc_str()[0] == L'\0' );
   CPPUNIT_ASSERT ( s3 + finalcut::FString("def") == L"def" );
   CPPUNIT_ASSERT ( s3 + std::wstring(L"def") == L"def" );
   CPPUNIT_ASSERT ( s3 + const_cast<wchar_t*>(L"def") == L"def" );
@@ -558,8 +533,8 @@ void FStringTest::additionTest()
   // Empty finalcut::FString + ...
   finalcut::FString s4;
   CPPUNIT_ASSERT ( s4.getLength() == 0 );
-  CPPUNIT_ASSERT ( s4.c_str() == nullptr );
+  CPPUNIT_ASSERT ( s4.c_str()[0] == '\0' );
-  CPPUNIT_ASSERT ( s4.wc_str() == nullptr );
+  CPPUNIT_ASSERT ( s4.wc_str()[0] == L'\0' );
   CPPUNIT_ASSERT ( s4 + finalcut::FString("def") == L"def" );
   CPPUNIT_ASSERT ( s4 + std::wstring(L"def") == L"def" );
   CPPUNIT_ASSERT ( s4 + const_cast<wchar_t*>(L"def") == L"def" );
@@ -642,7 +617,7 @@ void FStringTest::equalTest()
   CPPUNIT_ASSERT ( one_char == ch );
   CPPUNIT_ASSERT ( ch == one_char.c_str()[0] );
   CPPUNIT_ASSERT ( one_char.getLength() == 1 );
-  CPPUNIT_ASSERT ( one_char.capacity() == 16 );
+  CPPUNIT_ASSERT ( one_char.capacity() >= 1 );
 
   constexpr wchar_t wch = L'a';
   CPPUNIT_ASSERT ( one_char == wch );
@@ -656,7 +631,7 @@ void FStringTest::equalTest()
   constexpr char cstr[] = "abc";
   CPPUNIT_ASSERT ( str == cstr );
   CPPUNIT_ASSERT ( str.getLength() == 3 );
-  CPPUNIT_ASSERT ( str.capacity() == 18 );
+  CPPUNIT_ASSERT ( str.capacity() >= 3 );
   CPPUNIT_ASSERT ( strncmp(cstr, str.c_str(), 3) == 0 );
 
   constexpr wchar_t wcstr[] = L"abc";
@@ -677,7 +652,7 @@ void FStringTest::equalTest()
 
   CPPUNIT_ASSERT ( s->c_str()[0] == 'c');
   CPPUNIT_ASSERT ( s->getLength() == 1 );
-  CPPUNIT_ASSERT ( s->capacity() == 16 );
+  CPPUNIT_ASSERT ( s->capacity() >= 1 );
 }
 
 //----------------------------------------------------------------------
@@ -688,7 +663,7 @@ void FStringTest::notEqualTest()
   CPPUNIT_ASSERT ( one_char != ch );
   CPPUNIT_ASSERT ( ch != one_char.c_str()[0] );
   CPPUNIT_ASSERT ( one_char.getLength() == 1 );
-  CPPUNIT_ASSERT ( one_char.capacity() == 16 );
+  CPPUNIT_ASSERT ( one_char.capacity() >= 1 );
 
   constexpr wchar_t wch = L'_';
   CPPUNIT_ASSERT ( one_char != wch );
@@ -704,8 +679,8 @@ void FStringTest::notEqualTest()
   CPPUNIT_ASSERT ( strlen(s1.c_str()) == 3 );
   CPPUNIT_ASSERT ( s2.getLength() == 3 );
   CPPUNIT_ASSERT ( strlen(s2.c_str()) == 6 );
-  CPPUNIT_ASSERT ( s1.capacity() == 18 );
+  CPPUNIT_ASSERT ( s1.capacity() >= 3 );
-  CPPUNIT_ASSERT ( s2.capacity() == 18 );
+  CPPUNIT_ASSERT ( s2.capacity() >= 3 );
   CPPUNIT_ASSERT ( strncmp(cstr, s1.c_str(), 3) != 0 );
 
   constexpr wchar_t wcstr[] = L"abc";
@@ -1196,15 +1171,15 @@ void FStringTest::formatTest()
 
   const finalcut::FString null_fstring{};
   str2.sprintf (null_fstring, 0);
-  CPPUNIT_ASSERT ( str2.isNull() );
+  CPPUNIT_ASSERT ( str2.isEmpty() );
 
   constexpr wchar_t* null_wstring = 0;
   str2.sprintf (null_wstring, 0);
-  CPPUNIT_ASSERT ( str2.isNull() );
+  CPPUNIT_ASSERT ( str2.isEmpty() );
 
   constexpr char* null_string = 0;
   str2.sprintf (null_string, 0);
-  CPPUNIT_ASSERT ( str2.isNull() );
+  CPPUNIT_ASSERT ( str2.isEmpty() );
 
   std::setlocale (LC_NUMERIC, "C");
   finalcut::FString fnum1, fnum2;
@@ -1483,31 +1458,27 @@ void FStringTest::trimTest()
 
   const finalcut::FString& trim_str2 = L"\n  \n\n";
   CPPUNIT_ASSERT ( trim_str2.rtrim().isEmpty() );
-  CPPUNIT_ASSERT ( ! trim_str2.rtrim().isNull() );
   CPPUNIT_ASSERT ( trim_str2.rtrim().getLength() == 0 );
-  CPPUNIT_ASSERT ( trim_str2.rtrim().capacity() == 0 );
+  CPPUNIT_ASSERT ( trim_str2.rtrim().capacity() < std::wstring().max_size() );
   CPPUNIT_ASSERT ( *(trim_str2.rtrim().c_str() + trim_str2.rtrim().getLength()) == '\0' );
   CPPUNIT_ASSERT ( *(trim_str2.rtrim().wc_str() + trim_str2.rtrim().getLength()) == L'\0' );
   CPPUNIT_ASSERT ( trim_str2.ltrim().isEmpty() );
-  CPPUNIT_ASSERT ( ! trim_str2.ltrim().isNull() );
   CPPUNIT_ASSERT ( trim_str2.ltrim().getLength() == 0 );
-  CPPUNIT_ASSERT ( trim_str2.ltrim().capacity() == 0 );
+  CPPUNIT_ASSERT ( trim_str2.ltrim().capacity() < std::wstring().max_size() );
   CPPUNIT_ASSERT ( *(trim_str2.ltrim().c_str() + trim_str2.ltrim().getLength()) == '\0' );
   CPPUNIT_ASSERT ( *(trim_str2.ltrim().wc_str() + trim_str2.ltrim().getLength()) == L'\0' );
 
   const finalcut::FString trim_str3{};
   CPPUNIT_ASSERT ( trim_str3.ltrim().isEmpty() );
-  CPPUNIT_ASSERT ( trim_str3.ltrim().isNull() );
   CPPUNIT_ASSERT ( trim_str3.ltrim().getLength() == 0 );
-  CPPUNIT_ASSERT ( trim_str3.ltrim().capacity() == 0 );
+  CPPUNIT_ASSERT ( trim_str3.ltrim().capacity() < std::wstring().max_size() );
   CPPUNIT_ASSERT ( trim_str3.rtrim().isEmpty() );
   CPPUNIT_ASSERT ( trim_str3.rtrim().isEmpty() );
   CPPUNIT_ASSERT ( trim_str3.rtrim().getLength() == 0 );
-  CPPUNIT_ASSERT ( trim_str3.rtrim().capacity() == 0 );
+  CPPUNIT_ASSERT ( trim_str3.rtrim().capacity() < std::wstring().max_size() );
   CPPUNIT_ASSERT ( trim_str3.trim().isEmpty() );
-  CPPUNIT_ASSERT ( trim_str3.trim().isNull() );
   CPPUNIT_ASSERT ( trim_str3.trim().getLength() == 0 );
-  CPPUNIT_ASSERT ( trim_str3.trim().capacity() == 0 );
+  CPPUNIT_ASSERT ( trim_str3.trim().capacity() < std::wstring().max_size() );
 }
 
 //----------------------------------------------------------------------
@@ -1527,9 +1498,7 @@ void FStringTest::subStringTest()
   CPPUNIT_ASSERT ( str1.left(-5).getLength() == 39 );
   CPPUNIT_ASSERT ( str1.left(0) == L"" );
   CPPUNIT_ASSERT ( str1.left(0).isEmpty() );
-  CPPUNIT_ASSERT ( ! str1.left(0).isNull() );
+  CPPUNIT_ASSERT ( finalcut::FString().left(5).isEmpty() );
-  CPPUNIT_ASSERT ( finalcut::FString().left(5).isNull() );
-  CPPUNIT_ASSERT ( ! finalcut::FString("").left(5).isNull() );
   CPPUNIT_ASSERT ( finalcut::FString("").left(5).isEmpty() );
   CPPUNIT_ASSERT ( finalcut::FString("").left(5).getLength() == 0 );
 
@@ -1546,9 +1515,7 @@ void FStringTest::subStringTest()
   CPPUNIT_ASSERT ( str1.right(-5).getLength() == 39 );
   CPPUNIT_ASSERT ( str1.right(0) == L"" );
   CPPUNIT_ASSERT ( str1.right(0).isEmpty() );
-  CPPUNIT_ASSERT ( ! str1.right(0).isNull() );
+  CPPUNIT_ASSERT ( finalcut::FString().right(5).isEmpty() );
-  CPPUNIT_ASSERT ( finalcut::FString().right(5).isNull() );
-  CPPUNIT_ASSERT ( ! finalcut::FString("").right(5).isNull() );
   CPPUNIT_ASSERT ( finalcut::FString("").right(5).isEmpty() );
   CPPUNIT_ASSERT ( finalcut::FString("").right(5).getLength() == 0 );
 
@@ -1567,9 +1534,7 @@ void FStringTest::subStringTest()
   CPPUNIT_ASSERT ( str1.mid(0, 0) == L"" );
   CPPUNIT_ASSERT ( str1.mid(0, 5) == L"Look " );
   CPPUNIT_ASSERT ( str1.mid(0, 0).isEmpty() );
-  CPPUNIT_ASSERT ( ! str1.mid(0, 0).isNull() );
+  CPPUNIT_ASSERT ( finalcut::FString().mid(5, 0).isEmpty() );
-  CPPUNIT_ASSERT ( finalcut::FString().mid(5, 0).isNull() );
-  CPPUNIT_ASSERT ( ! finalcut::FString("").mid(5, 0).isNull() );
   CPPUNIT_ASSERT ( finalcut::FString("").mid(5, 0).isEmpty() );
   CPPUNIT_ASSERT ( str1.mid(5, 0).getLength() == 0 );
 
@@ -1935,14 +1900,10 @@ void FStringTest::replaceTest()
   CPPUNIT_ASSERT ( s1.replace(from6, empty) == "ABC"  );
 
   s1.clear();
-  CPPUNIT_ASSERT ( s1.replace(from1, to1).isNull() );
   CPPUNIT_ASSERT ( s1.replace(from1, to1).isEmpty() );
-  CPPUNIT_ASSERT ( s1.replace(from6, to1).isNull() );
   CPPUNIT_ASSERT ( s1.replace(from6, to1).isEmpty() );
 
-  CPPUNIT_ASSERT ( s1.replace(from5, to5).isNull() );
   CPPUNIT_ASSERT ( s1.replace(from5, to5).isEmpty() );
-  CPPUNIT_ASSERT ( s1.replace(from7, to7).isNull() );
   CPPUNIT_ASSERT ( s1.replace(from7, to7).isEmpty() );
 }
 

test/fstringstream-test.cpp

@@ -3,7 +3,7 @@
 *                                                                      *
 * This file is part of the FINAL CUT widget toolkit                    *
 *                                                                      *
-* Copyright 2020 Markus Gans                                           *
+* Copyright 2020-2021 Markus Gans                                      *
 *                                                                      *
 * FINAL CUT is free software; you can redistribute it and/or modify    *
 * it under the terms of the GNU Lesser General Public License as       *
@@ -83,12 +83,10 @@ void FStringStreamTest::classNameTest()
 void FStringStreamTest::defaultObjectTest()
 {
   finalcut::FStringStream ss{std::ios_base::out};
-  CPPUNIT_ASSERT ( ss.str().isNull() );
   CPPUNIT_ASSERT ( ss.str().isEmpty() );
-  CPPUNIT_ASSERT ( ss.str() != "" );
+  CPPUNIT_ASSERT ( ss.str() == "" );
 
   ss << "Hello";
-  CPPUNIT_ASSERT ( ! ss.str().isNull() );
   CPPUNIT_ASSERT ( ! ss.str().isEmpty() );
   CPPUNIT_ASSERT ( ss.str() = "Hello" );
 
@@ -97,9 +95,8 @@ void FStringStreamTest::defaultObjectTest()
   CPPUNIT_ASSERT ( ss.str() == L"Hello, World!" );
 
   ss.clear();
-  CPPUNIT_ASSERT ( ss.str().isNull() );
   CPPUNIT_ASSERT ( ss.str().isEmpty() );
-  CPPUNIT_ASSERT ( ss.str() != "" );
+  CPPUNIT_ASSERT ( ss.str() == "" );
   ss.clear();
 
   ss << "Three" << " " << "parts";
@@ -140,7 +137,6 @@ void FStringStreamTest::moveConstructorTest()
   const finalcut::FStringStream ss2{std::move(ss1)};
   CPPUNIT_ASSERT ( ss2.str() == L"abc" );
   CPPUNIT_ASSERT ( ss2.str().getLength() == 3 );
-  CPPUNIT_ASSERT ( ss1.str().isNull() );
   CPPUNIT_ASSERT ( ss1.str().isEmpty() );
   CPPUNIT_ASSERT ( ss1.str().getLength() == 0 );
 }
@@ -153,7 +149,6 @@ void FStringStreamTest::assignmentTest()
   ss2 = std::move(ss1);
   CPPUNIT_ASSERT ( ss2.str() == L"xyz" );
   CPPUNIT_ASSERT ( ss2.str().getLength() == 3 );
-  CPPUNIT_ASSERT ( ss1.str().isNull() );
   CPPUNIT_ASSERT ( ss1.str().isEmpty() );
   CPPUNIT_ASSERT ( ss1.str().getLength() == 0 );
 }
@@ -189,7 +184,6 @@ void FStringStreamTest::rdbufTest()
   CPPUNIT_ASSERT ( ss.str().getLength() == 4 );
 
   ss.rdbuf()->str(L"");
-  CPPUNIT_ASSERT ( ss.str().isNull() );
   CPPUNIT_ASSERT ( ss.str().isEmpty() );
   CPPUNIT_ASSERT ( ss.str().getLength() == 0 );
 }