don't compare initial slider position with uninitialized m_pos (modified patch 1818759)

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

diff --git a/include/wx/stream.h b/include/wx/stream.h
index cad5148ab906bb41eede60c7aa4d15697be0919d..73522f1c3774a0d828ab63d1abf7f1115fe635c2 100644 (file)
--- a/include/wx/stream.h
+++ b/include/wx/stream.h
@@ -21,9 +21,9 @@
 #include "wx/string.h"
 #include "wx/filefn.h"  // for wxFileOffset, wxInvalidOffset and wxSeekMode
 
-class WXDLLIMPEXP_BASE wxStreamBase;
-class WXDLLIMPEXP_BASE wxInputStream;
-class WXDLLIMPEXP_BASE wxOutputStream;
+class WXDLLIMPEXP_FWD_BASE wxStreamBase;
+class WXDLLIMPEXP_FWD_BASE wxInputStream;
+class WXDLLIMPEXP_FWD_BASE wxOutputStream;
 
 typedef wxInputStream& (*__wxInputManip)(wxInputStream&);
 typedef wxOutputStream& (*__wxOutputManip)(wxOutputStream&);
@@ -42,6 +42,8 @@ enum wxStreamError
     wxSTREAM_READ_ERROR         // generic read error
 };
 
+const int wxEOF = -1;
+
 // ============================================================================
 // base stream classes: wxInputStream and wxOutputStream
 // ============================================================================
@@ -50,7 +52,7 @@ enum wxStreamError
 // wxStreamBase: common (but non virtual!) base for all stream classes
 // ---------------------------------------------------------------------------
 
-class WXDLLIMPEXP_BASE wxStreamBase
+class WXDLLIMPEXP_BASE wxStreamBase : public wxObject
 {
 public:
     wxStreamBase();
@@ -80,6 +82,7 @@ protected:
 
     friend class wxStreamBuffer;
 
+    DECLARE_ABSTRACT_CLASS(wxStreamBase)
     DECLARE_NO_COPY_CLASS(wxStreamBase)
 };
 
@@ -106,11 +109,11 @@ public:
     // undefined), otherwise 1
     virtual char Peek();
 
-    // return one character from the stream, blocking until it appears if
+    // return one byte from the stream, blocking until it appears if
     // necessary
     //
-    // if EOF, return value is undefined and LastRead() will return 0 and not 1
-    char GetC();
+    // on success returns a value between 0 - 255, or wxEOF on EOF or error.
+    int GetC();
 
     // read at most the given number of bytes from the stream
     //
@@ -214,6 +217,7 @@ protected:
 
     friend class wxStreamBuffer;
 
+    DECLARE_ABSTRACT_CLASS(wxInputStream)
     DECLARE_NO_COPY_CLASS(wxInputStream)
 };
 
@@ -249,6 +253,7 @@ protected:
 
     friend class wxStreamBuffer;
 
+    DECLARE_ABSTRACT_CLASS(wxOutputStream)
     DECLARE_NO_COPY_CLASS(wxOutputStream)
 };
 
@@ -276,6 +281,7 @@ protected:
 
     size_t m_currentPos;
 
+    DECLARE_DYNAMIC_CLASS(wxCountingOutputStream)
     DECLARE_NO_COPY_CLASS(wxCountingOutputStream)
 };
 
@@ -301,6 +307,7 @@ protected:
     wxInputStream *m_parent_i_stream;
     bool m_owns;
 
+    DECLARE_ABSTRACT_CLASS(wxFilterInputStream)
     DECLARE_NO_COPY_CLASS(wxFilterInputStream)
 };
 
@@ -322,28 +329,24 @@ protected:
     wxOutputStream *m_parent_o_stream;
     bool m_owns;
 
+    DECLARE_ABSTRACT_CLASS(wxFilterOutputStream)
     DECLARE_NO_COPY_CLASS(wxFilterOutputStream)
 };
 
 enum wxStreamProtocolType
 {
-    wxSTREAM_PROTOCOL,      // wxFileSystem protocol (should be only one)
-    wxSTREAM_MIMETYPE,      // Mime types the stream handles
-    wxSTREAM_ENCODING,      // The http Content-Encodings the stream handles
-    wxSTREAM_FILEEXTENSION  // File extensions the stream handles
+    wxSTREAM_PROTOCOL,  // wxFileSystem protocol (should be only one)
+    wxSTREAM_MIMETYPE,  // MIME types the stream handles
+    wxSTREAM_ENCODING,  // The HTTP Content-Encodings the stream handles
+    wxSTREAM_FILEEXT    // File extensions the stream handles
 };
 
 void WXDLLIMPEXP_BASE wxUseFilterClasses();
 
-class WXDLLIMPEXP_BASE wxFilterClassFactory : public wxObject
+class WXDLLIMPEXP_BASE wxFilterClassFactoryBase : public wxObject
 {
 public:
-    virtual ~wxFilterClassFactory() { }
-
-    virtual wxFilterInputStream  *NewStream(wxInputStream& stream)  const = 0;
-    virtual wxFilterOutputStream *NewStream(wxOutputStream& stream) const = 0;
-    virtual wxFilterInputStream  *NewStream(wxInputStream *stream)  const = 0;
-    virtual wxFilterOutputStream *NewStream(wxOutputStream *stream) const = 0;
+    virtual ~wxFilterClassFactoryBase() { }
 
     wxString GetProtocol() const { return wxString(*GetProtocols()); }
     wxString PopExtension(const wxString& location) const;
@@ -351,11 +354,27 @@ public:
     virtual const wxChar * const *GetProtocols(wxStreamProtocolType type
                                                = wxSTREAM_PROTOCOL) const = 0;
 
-    bool CanHandle(const wxChar *protocol,
+    bool CanHandle(const wxString& protocol,
                    wxStreamProtocolType type
                    = wxSTREAM_PROTOCOL) const;
 
-    static const wxFilterClassFactory *Find(const wxChar *protocol,
+protected:
+    wxString::size_type FindExtension(const wxString& location) const;
+
+    DECLARE_ABSTRACT_CLASS(wxFilterClassFactoryBase)
+};
+
+class WXDLLIMPEXP_BASE wxFilterClassFactory : public wxFilterClassFactoryBase
+{
+public:
+    virtual ~wxFilterClassFactory() { }
+
+    virtual wxFilterInputStream  *NewStream(wxInputStream& stream)  const = 0;
+    virtual wxFilterOutputStream *NewStream(wxOutputStream& stream) const = 0;
+    virtual wxFilterInputStream  *NewStream(wxInputStream *stream)  const = 0;
+    virtual wxFilterOutputStream *NewStream(wxOutputStream *stream) const = 0;
+
+    static const wxFilterClassFactory *Find(const wxString& protocol,
                                             wxStreamProtocolType type
                                             = wxSTREAM_PROTOCOL);
 
@@ -371,8 +390,6 @@ protected:
     wxFilterClassFactory& operator=(const wxFilterClassFactory&)
         { return *this; }
 
-    wxString::size_type FindExtension(const wxChar *location) const;
-
 private:
     static wxFilterClassFactory *sm_first;
     wxFilterClassFactory *m_next;
@@ -417,6 +434,7 @@ public:
 
     // Buffer control
     void ResetBuffer();
+    void Truncate();
 
     // NB: the buffer must always be allocated with malloc() if takeOwn is
     //     true as it will be deallocated by free()