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

diff --git a/include/wx/unichar.h b/include/wx/unichar.h
index a7a74dec83bf747e72626d428efb8f68b74bc6f0..9d0b593bd7918065be26e0ae3008b7d9329d9abb 100644 (file)
--- a/include/wx/unichar.h
+++ b/include/wx/unichar.h
@@ -15,8 +15,8 @@
 #include "wx/chartype.h"
 #include "wx/stringimpl.h"
 
-class WXDLLIMPEXP_BASE wxUniCharRef;
-class WXDLLIMPEXP_BASE wxStringIteratorNode;
+class WXDLLIMPEXP_FWD_BASE wxUniCharRef;
+class WXDLLIMPEXP_FWD_BASE wxString;
 
 // This class represents single Unicode character. It can be converted to
 // and from char or wchar_t and implements commonly used character operations.
@@ -96,7 +96,7 @@ public:
     bool operator&&(bool v) const { return (bool)*this && v; }
 
     // Assignment operators:
-    wxUniChar& operator=(const wxUniChar& c) { m_value = c.m_value; return *this; }
+    wxUniChar& operator=(const wxUniChar& c) { if (&c != this) m_value = c.m_value; return *this; }
     wxUniChar& operator=(const wxUniCharRef& c);
     wxUniChar& operator=(char c) { m_value = From8bit(c); return *this; }
     wxUniChar& operator=(unsigned char c) { m_value = From8bit((char)c); return *this; }
@@ -137,8 +137,35 @@ public:
 
 
 private:
-    static value_type From8bit(char c);
-    static char To8bit(value_type c);
+    // notice that we implement these functions inline for 7-bit ASCII
+    // characters purely for performance reasons
+    static value_type From8bit(char c)
+    {
+#if wxUSE_UNICODE
+        if ( (unsigned char)c < 0x80 )
+            return c;
+
+        return FromHi8bit(c);
+#else
+        return c;
+#endif
+    }
+
+    static char To8bit(value_type c)
+    {
+#if wxUSE_UNICODE
+        if ( c < 0x80 )
+            return wx_truncate_cast(char, c);
+
+        return ToHi8bit(c);
+#else
+        return c;
+#endif
+    }
+
+    // helpers of the functions above called to deal with non-ASCII chars
+    static value_type FromHi8bit(char c);
+    static char ToHi8bit(value_type c);
 
 private:
     value_type m_value;
@@ -156,7 +183,7 @@ private:
 
     // create the reference
 #if wxUSE_UNICODE_UTF8
-    wxUniCharRef(wxStringIteratorNode& node, iterator pos) : m_node(node), m_pos(pos) {}
+    wxUniCharRef(wxString& str, iterator pos) : m_str(str), m_pos(pos) {}
 #else
     wxUniCharRef(iterator pos) : m_pos(pos) {}
 #endif
@@ -168,8 +195,8 @@ public:
     //     that must be used explicitly (this is more than using 'explicit'
     //     keyword on ctor!):
 #if wxUSE_UNICODE_UTF8
-    static wxUniCharRef CreateForString(wxStringIteratorNode& node, iterator pos)
-        { return wxUniCharRef(node, pos); }
+    static wxUniCharRef CreateForString(wxString& str, iterator pos)
+        { return wxUniCharRef(str, pos); }
 #else
     static wxUniCharRef CreateForString(iterator pos)
         { return wxUniCharRef(pos); }
@@ -191,7 +218,7 @@ public:
 #endif
 
     wxUniCharRef& operator=(const wxUniCharRef& c)
-        { return *this = c.UniChar(); }
+        { if (&c != this) *this = c.UniChar(); return *this; }
 
     wxUniCharRef& operator=(char c) { return *this = wxUniChar(c); }
     wxUniCharRef& operator=(unsigned char c) { return *this = wxUniChar(c); }
@@ -255,12 +282,12 @@ private:
     wxUniChar UniChar() const { return *m_pos; }
 #endif
 
-    friend class WXDLLIMPEXP_BASE wxUniChar;
+    friend class WXDLLIMPEXP_FWD_BASE wxUniChar;
 
 private:
     // reference to the string and pointer to the character in string
 #if wxUSE_UNICODE_UTF8
-    wxStringIteratorNode& m_node;
+    wxString& m_str;
 #endif
     iterator m_pos;
 };