Upgrade WX to r74856, mainly to support @2x.

Externals/wxWidgets3/include/wx/datstrm.h

@@ -4,7 +4,6 @@
 // Author:      Guilhem Lavaux
 // Modified by: Mickael Gilabert
 // Created:     28/06/1998
-// RCS-ID:      $Id: datstrm.h 67254 2011-03-20 00:14:35Z DS $
 // Copyright:   (c) Guilhem Lavaux
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
@@ -18,15 +17,64 @@
 
 #if wxUSE_STREAMS
 
-class WXDLLIMPEXP_BASE wxDataInputStream
+// Common wxDataInputStream and wxDataOutputStream parameters.
+class WXDLLIMPEXP_BASE wxDataStreamBase
 {
 public:
+    void BigEndianOrdered(bool be_order) { m_be_order = be_order; }
+
+    // By default we use extended precision (80 bit) format for both float and
+    // doubles. Call this function to switch to alternative representation in
+    // which IEEE 754 single precision (32 bits) is used for floats and double
+    // precision (64 bits) is used for doubles.
+    void UseBasicPrecisions()
+    {
+#if wxUSE_APPLE_IEEE
+        m_useExtendedPrecision = false;
+#endif // wxUSE_APPLE_IEEE
+    }
+
+    // UseExtendedPrecision() is not very useful as it corresponds to the
+    // default value, only call it in your code if you want the compilation
+    // fail with the error when using wxWidgets library compiled without
+    // extended precision support.
+#if wxUSE_APPLE_IEEE
+    void UseExtendedPrecision()
+    {
+        m_useExtendedPrecision = true;
+    }
+#endif // wxUSE_APPLE_IEEE
+
 #if wxUSE_UNICODE
-    wxDataInputStream(wxInputStream& s, const wxMBConv& conv = wxConvUTF8 );
-#else
-    wxDataInputStream(wxInputStream& s);
+    void SetConv( const wxMBConv &conv );
+    wxMBConv *GetConv() const { return m_conv; }
 #endif
-    ~wxDataInputStream();
+
+protected:
+    // Ctor and dtor are both protected, this class is never used directly but
+    // only by its derived classes.
+    wxDataStreamBase(const wxMBConv& conv);
+    ~wxDataStreamBase();
+
+
+    bool m_be_order;
+
+#if wxUSE_APPLE_IEEE
+    bool m_useExtendedPrecision;
+#endif // wxUSE_APPLE_IEEE
+
+#if wxUSE_UNICODE
+    wxMBConv *m_conv;
+#endif
+
+    wxDECLARE_NO_COPY_CLASS(wxDataStreamBase);
+};
+
+
+class WXDLLIMPEXP_BASE wxDataInputStream : public wxDataStreamBase
+{
+public:
+    wxDataInputStream(wxInputStream& s, const wxMBConv& conv = wxConvUTF8);
 
     bool IsOk() { return m_input->IsOk(); }
 
@@ -40,6 +88,7 @@ public:
     wxUint16 Read16();
     wxUint8 Read8();
     double ReadDouble();
+    float ReadFloat();
     wxString ReadString();
 
 #if wxHAS_INT64
@@ -58,6 +107,7 @@ public:
     void Read16(wxUint16 *buffer, size_t size);
     void Read8(wxUint8 *buffer, size_t size);
     void ReadDouble(double *buffer, size_t size);
+    void ReadFloat(float *buffer, size_t size);
 
     wxDataInputStream& operator>>(wxString& s);
     wxDataInputStream& operator>>(wxInt8& c);
@@ -74,35 +124,19 @@ public:
     wxDataInputStream& operator>>(wxULongLong& i);
     wxDataInputStream& operator>>(wxLongLong& i);
 #endif
-    wxDataInputStream& operator>>(double& i);
+    wxDataInputStream& operator>>(double& d);
     wxDataInputStream& operator>>(float& f);
 
-    void BigEndianOrdered(bool be_order) { m_be_order = be_order; }
-
-#if wxUSE_UNICODE
-    void SetConv( const wxMBConv &conv );
-    wxMBConv *GetConv() const { return m_conv; }
-#endif
-
 protected:
     wxInputStream *m_input;
-    bool m_be_order;
-#if wxUSE_UNICODE
-    wxMBConv *m_conv;
-#endif
 
     wxDECLARE_NO_COPY_CLASS(wxDataInputStream);
 };
 
-class WXDLLIMPEXP_BASE wxDataOutputStream
+class WXDLLIMPEXP_BASE wxDataOutputStream : public wxDataStreamBase
 {
 public:
-#if wxUSE_UNICODE
-    wxDataOutputStream(wxOutputStream& s, const wxMBConv& conv = wxConvUTF8 );
-#else
-    wxDataOutputStream(wxOutputStream& s);
-#endif
-    ~wxDataOutputStream();
+    wxDataOutputStream(wxOutputStream& s, const wxMBConv& conv = wxConvUTF8);
 
     bool IsOk() { return m_output->IsOk(); }
 
@@ -118,6 +152,7 @@ public:
     void Write16(wxUint16 i);
     void Write8(wxUint8 i);
     void WriteDouble(double d);
+    void WriteFloat(float f);
     void WriteString(const wxString& string);
 
 #if wxHAS_INT64
@@ -136,6 +171,7 @@ public:
     void Write16(const wxUint16 *buffer, size_t size);
     void Write8(const wxUint8 *buffer, size_t size);
     void WriteDouble(const double *buffer, size_t size);
+    void WriteFloat(const float *buffer, size_t size);
 
     wxDataOutputStream& operator<<(const wxString& string);
     wxDataOutputStream& operator<<(wxInt8 c);
@@ -152,22 +188,11 @@ public:
     wxDataOutputStream& operator<<(const wxULongLong &i);
     wxDataOutputStream& operator<<(const wxLongLong &i);
 #endif
-    wxDataOutputStream& operator<<(double f);
+    wxDataOutputStream& operator<<(double d);
     wxDataOutputStream& operator<<(float f);
 
-    void BigEndianOrdered(bool be_order) { m_be_order = be_order; }
-
-#if wxUSE_UNICODE
-    void SetConv( const wxMBConv &conv );
-    wxMBConv *GetConv() const { return m_conv; }
-#endif
-
 protected:
     wxOutputStream *m_output;
-    bool m_be_order;
-#if wxUSE_UNICODE
-    wxMBConv *m_conv;
-#endif
 
     wxDECLARE_NO_COPY_CLASS(wxDataOutputStream);
 };