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

diff --git a/include/wx/unichar.h b/include/wx/unichar.h
index 8c61a2c898d31b0b0c067c0cdf2161181a7ecae9..9d0b593bd7918065be26e0ae3008b7d9329d9abb 100644 (file)
--- a/include/wx/unichar.h
+++ b/include/wx/unichar.h
@@ -15,26 +15,8 @@
 #include "wx/chartype.h"
 #include "wx/stringimpl.h"
 
-#ifndef wxWCHAR_T_IS_SEPARATE_TYPE
-    // older versions of VC++ have wchar_t as typedef by default; this is
-    // configurable, so we have to check which behaviour is enabled
-    #if defined(__VISUALC__) && !defined(_NATIVE_WCHAR_T_DEFINED)
-        #define wxWCHAR_T_IS_SEPARATE_TYPE 0
-    #else
-        #define wxWCHAR_T_IS_SEPARATE_TYPE 1
-    #endif
-#endif
-
-// helper macro for doing something dependent on whether wchar_t is or isn't a
-// typedef inside another macro
-#if wxWCHAR_T_IS_SEPARATE_TYPE
-    #define wxIF_WCHAR_T_TYPE(x) x
-#else // !wxWCHAR_T_IS_SEPARATE_TYPE
-    #define wxIF_WCHAR_T_TYPE(x)
-#endif // wxWCHAR_T_IS_SEPARATE_TYPE/!wxWCHAR_T_IS_SEPARATE_TYPE
-
-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.
@@ -54,7 +36,7 @@ public:
     wxUniChar(unsigned char c) { m_value = From8bit((char)c); }
 
     // Create the character from a wchar_t character value.
-#if wxWCHAR_T_IS_SEPARATE_TYPE
+#if wxWCHAR_T_IS_REAL_TYPE
     wxUniChar(wchar_t c) { m_value = c; }
 #endif
 
@@ -91,15 +73,15 @@ public:
     // functions
     operator char() const { return To8bit(m_value); }
     operator unsigned char() const { return (unsigned char)To8bit(m_value); }
-#if wxWCHAR_T_IS_SEPARATE_TYPE
-    operator wchar_t() const { return m_value; }
+#if wxWCHAR_T_IS_REAL_TYPE
+    operator wchar_t() const { return (wchar_t)m_value; }
 #endif
-    operator int() const { return m_value; }
-    operator unsigned int() const { return m_value; }
-    operator long int() const { return m_value; }
-    operator unsigned long int() const { return m_value; }
-    operator short int() const { return m_value; }
-    operator unsigned short int() const { return m_value; }
+    operator int() const { return (int)m_value; }
+    operator unsigned int() const { return (unsigned int)m_value; }
+    operator long int() const { return (long int)m_value; }
+    operator unsigned long int() const { return (unsigned long)m_value; }
+    operator short int() const { return (short int)m_value; }
+    operator unsigned short int() const { return (unsigned short int)m_value; }
 
     // We need this operator for the "*p" part of expressions like "for (
     // const_iterator p = begin() + nStart; *p; ++p )". In this case,
@@ -114,10 +96,11 @@ 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; }
-#if wxWCHAR_T_IS_SEPARATE_TYPE
+#if wxWCHAR_T_IS_REAL_TYPE
     wxUniChar& operator=(wchar_t c) { m_value = c; return *this; }
 #endif
     wxUniChar& operator=(int c) { m_value = c; return *this; }
@@ -154,8 +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;
@@ -173,7 +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
@@ -185,8 +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); }
@@ -208,11 +218,11 @@ 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); }
-#if wxWCHAR_T_IS_SEPARATE_TYPE
+#if wxWCHAR_T_IS_REAL_TYPE
     wxUniCharRef& operator=(wchar_t c) { return *this = wxUniChar(c); }
 #endif
     wxUniCharRef& operator=(int c) { return *this = wxUniChar(c); }
@@ -225,7 +235,7 @@ public:
     // Conversions to the same types as wxUniChar is convertible too:
     operator char() const { return UniChar(); }
     operator unsigned char() const { return UniChar(); }
-#if wxWCHAR_T_IS_SEPARATE_TYPE
+#if wxWCHAR_T_IS_REAL_TYPE
     operator wchar_t() const { return UniChar(); }
 #endif
     operator int() const { return UniChar(); }
@@ -272,12 +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;
 };
@@ -287,6 +297,12 @@ inline wxUniChar::wxUniChar(const wxUniCharRef& c)
     m_value = c.UniChar().m_value;
 }
 
+inline wxUniChar& wxUniChar::operator=(const wxUniCharRef& c)
+{
+    m_value = c.UniChar().m_value;
+    return *this;
+}
+
 // Comparison operators for the case when wxUniChar(Ref) is the second operand
 // implemented in terms of member comparison functions