fixed DeleteContents inconsistency: didn't free memory if DeleteContents called befor...

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

diff --git a/include/wx/stream.h b/include/wx/stream.h
index c56b8c6171763966f0d444c18d1f4c048af15cc6..7004ab2359457dca43d9b4934815b1ddd26a1b66 100644 (file)
--- a/include/wx/stream.h
+++ b/include/wx/stream.h
@@ -9,96 +9,312 @@
 // Licence:     wxWindows license
 /////////////////////////////////////////////////////////////////////////////
 
 // Licence:     wxWindows license
 /////////////////////////////////////////////////////////////////////////////
 

-#ifndef __WXSTREAM_H__
-#define __WXSTREAM_H__
+#ifndef _WX_WXSTREAM_H__
+#define _WX_WXSTREAM_H__

 
 #ifdef __GNUG__
 #pragma interface
 #endif
 
 
 #ifdef __GNUG__
 #pragma interface
 #endif
 

+#include "wx/defs.h"
+
+#if wxUSE_STREAMS
+

 #include <stdio.h>
 #include "wx/object.h"
 #include "wx/string.h"
 #include <stdio.h>
 #include "wx/object.h"
 #include "wx/string.h"

-#include "wx/filefn.h"  // for off_t and wxSeekMode
+#include "wx/filefn.h"  // for off_t, wxInvalidOffset and wxSeekMode
+
+class WXDLLEXPORT wxStreamBase;
+class WXDLLEXPORT wxInputStream;
+class WXDLLEXPORT wxOutputStream;
+
+typedef wxInputStream& (*__wxInputManip)(wxInputStream&);
+typedef wxOutputStream& (*__wxOutputManip)(wxOutputStream&);
+
+WXDLLEXPORT wxOutputStream& wxEndL(wxOutputStream& o_stream);
+
+// ---------------------------------------------------------------------------
+// wxStream: base classes
+// ---------------------------------------------------------------------------
+
+#define wxStream_NOERROR    wxSTREAM_NOERROR
+#define wxStream_EOF        wxSTREAM_EOF
+#define wxStream_WRITE_ERR  wxSTREAM_WRITE_ERROR
+#define wxStream_READ_ERR   wxSTREAM_READ_ERROR
+
+typedef enum {
+  wxSTREAM_NO_ERROR = 0,
+  wxSTREAM_NO_ERR = wxSTREAM_NO_ERROR,
+  wxSTREAM_NOERROR = wxSTREAM_NO_ERROR,
+
+  wxSTREAM_EOF,
+
+  wxSTREAM_WRITE_ERROR,
+  wxSTREAM_WRITE_ERR = wxSTREAM_WRITE_ERROR,
+
+  wxSTREAM_READ_ERROR,
+  wxSTREAM_READ_ERR = wxSTREAM_READ_ERROR
+
+} wxStreamError;
+
+class WXDLLEXPORT wxStreamBase
+{
+public:
+    wxStreamBase();
+    virtual ~wxStreamBase();
+
+    bool operator!() const { return (LastError() != wxSTREAM_NOERROR); }
+    wxStreamError LastError() const { return m_lasterror; }
+    virtual size_t GetSize() const { return ~((size_t)0); }
+    size_t StreamSize() const { return GetSize(); }
+
+protected:
+    virtual size_t OnSysRead(void *buffer, size_t bufsize);
+    virtual size_t OnSysWrite(const void *buffer, size_t bufsize);
+    virtual off_t OnSysSeek(off_t seek, wxSeekMode mode);
+    virtual off_t OnSysTell() const;
+
+    friend class wxStreamBuffer;
+
+    size_t m_lastcount;
+    wxStreamError m_lasterror;
+};
+
+class WXDLLEXPORT wxInputStream: public wxStreamBase
+{
+public:
+    wxInputStream();
+    virtual ~wxInputStream();
+
+    // IO functions
+    virtual char Peek();
+    char GetC();
+    virtual wxInputStream& Read(void *buffer, size_t size);
+    wxInputStream& Read(wxOutputStream& stream_out);
+
+    // Position functions
+    virtual off_t SeekI(off_t pos, wxSeekMode mode = wxFromStart);
+    virtual off_t TellI() const;
+
+    // State functions
+    virtual size_t LastRead() { return wxStreamBase::m_lastcount; }
+
+    // Ungetch
+    size_t Ungetch(const void *buffer, size_t size);
+    bool Ungetch(char c);
+
+    // Operators
+    wxInputStream& operator>>(wxOutputStream& out) { return Read(out); }
+#if wxUSE_SERIAL
+    wxInputStream& operator>>(wxObject *& obj);
+#endif
+    wxInputStream& operator>>( __wxInputManip func) { return func(*this); }
+
+protected:
+    // Ungetch managers
+    char *m_wback;
+    size_t m_wbacksize;
+    size_t m_wbackcur;
+
+    char *AllocSpaceWBack(size_t needed_size);
+    size_t GetWBack(char *buf, size_t bsize);
+};
+
+class WXDLLEXPORT wxOutputStream: public wxStreamBase
+{
+public:
+    wxOutputStream();
+    virtual ~wxOutputStream();
+
+    void PutC(char c);
+    virtual wxOutputStream& Write(const void *buffer, size_t size);
+    wxOutputStream& Write(wxInputStream& stream_in);
+
+    virtual off_t SeekO(off_t pos, wxSeekMode mode = wxFromStart);
+    virtual off_t TellO() const;

 
 

-/*
- * wxStream: base classes
- */
-class wxOutputStream;
-class wxInputStream {
- public:
-  wxInputStream();
-  virtual ~wxInputStream();
+    virtual size_t LastWrite() const { return wxStreamBase::m_lastcount; }

 
 

-  virtual wxInputStream& Read(void *buffer, size_t size) = 0;
-  wxInputStream& Read(wxOutputStream& stream_out);
+    virtual void Sync();

 
 

-  virtual off_t SeekI(off_t pos, wxSeekMode mode = wxFromStart) = 0;
-  virtual off_t TellI() const = 0;
+    wxOutputStream& operator<<(wxInputStream& out) { return Write(out); }
+#if wxUSE_SERIAL
+    wxOutputStream& operator<<(wxObject& obj);
+#endif
+    wxOutputStream& operator<<( __wxOutputManip func) { return func(*this); }
+};
+
+// ---------------------------------------------------------------------------
+// A stream for measuring streamed output
+// ---------------------------------------------------------------------------
+
+class WXDLLEXPORT wxCountingOutputStream: public wxOutputStream
+{
+public:
+    wxCountingOutputStream();

 
 

-  virtual bool Eof() const = 0;
-  virtual size_t LastRead() const = 0;
+    size_t GetSize() const;
+    bool Ok() const { return TRUE; }

 
 

-  wxInputStream& operator>>(wxOutputStream& out) { return Read(out); }
+protected:
+    size_t OnSysWrite(const void *buffer, size_t size);
+    off_t OnSysSeek(off_t pos, wxSeekMode mode);
+    off_t OnSysTell() const;
+
+    size_t m_currentPos;

 };
 
 };
 

-class wxOutputStream {
- public:
-  wxOutputStream();
-  virtual ~wxOutputStream();
+// ---------------------------------------------------------------------------
+// "Filter" streams
+// ---------------------------------------------------------------------------
+
+class WXDLLEXPORT wxFilterInputStream: public wxInputStream
+{
+public:
+    wxFilterInputStream();
+    wxFilterInputStream(wxInputStream& stream);
+    ~wxFilterInputStream();
+
+    char Peek() { return m_parent_i_stream->Peek(); }
+
+    size_t GetSize() const { return m_parent_i_stream->GetSize(); }

 
 

-  virtual wxOutputStream& Write(const void *buffer, size_t size) = 0;
-  wxOutputStream& Write(wxInputStream& stream_in);
+protected:
+    wxInputStream *m_parent_i_stream;
+};

 
 

-  virtual off_t SeekO(off_t pos, wxSeekMode mode = wxFromStart) = 0;
-  virtual off_t TellO() const = 0;
+class WXDLLEXPORT wxFilterOutputStream: public wxOutputStream
+{
+public:
+    wxFilterOutputStream();
+    wxFilterOutputStream(wxOutputStream& stream);
+    ~wxFilterOutputStream();

 
 

-  virtual bool Bad() const = 0;
-  virtual size_t LastWrite() const = 0;
+    size_t GetSize() const { return m_parent_o_stream->GetSize(); }

 
 

-  virtual void Sync() {}
+protected:
+    wxOutputStream *m_parent_o_stream;

 };
 
 };
 

-/*
- * "Filter" streams
- */
+// ---------------------------------------------------------------------------
+// Stream buffer
+// ---------------------------------------------------------------------------
+
+class WXDLLEXPORT wxStreamBuffer
+{
+public:
+    typedef enum {
+        read = 0, write, read_write
+    } BufMode;
+
+    wxStreamBuffer(wxStreamBase& stream, BufMode mode);
+    wxStreamBuffer(BufMode mode);
+    wxStreamBuffer(const wxStreamBuffer& buf);
+    ~wxStreamBuffer();
+
+    // Filtered IO
+    size_t Read(void *buffer, size_t size);
+    size_t Read(wxStreamBuffer *buf);
+    size_t Write(const void *buffer, size_t size);
+    size_t Write(wxStreamBuffer *buf);
+
+    char Peek();
+    char GetChar();
+    void PutChar(char c);
+    off_t Tell() const;
+    off_t Seek(off_t pos, wxSeekMode mode);
+
+    // Buffer control
+    void ResetBuffer();
+    void SetBufferIO(char *buffer_start, char *buffer_end);
+    void SetBufferIO(size_t bufsize);
+    char *GetBufferStart() const { return m_buffer_start; }
+    char *GetBufferEnd() const { return m_buffer_end; }
+    char *GetBufferPos() const { return m_buffer_pos; }
+    off_t GetIntPosition() const { return m_buffer_pos-m_buffer_start; }
+    void SetIntPosition(off_t pos) { m_buffer_pos = m_buffer_start+pos; }
+    size_t GetLastAccess() const { return m_buffer_end-m_buffer_start; }
+
+    void Fixed(bool fixed) { m_fixed = fixed; }
+    void Flushable(bool f) { m_flushable = f; }
+
+    bool FlushBuffer();
+    bool FillBuffer();
+    size_t GetDataLeft();

 
 

-class wxFilterInputStream: public wxInputStream {
- public:
-  wxFilterInputStream(wxInputStream& stream);
-  virtual ~wxFilterInputStream();
+    // Misc.
+    wxStreamBase *Stream() { return m_stream; }

 
 

-  virtual wxInputStream& Read(void *buffer, size_t size)
-     { return m_parent_i_stream->Read(buffer, size); }
-  virtual off_t SeekI(off_t pos, wxSeekMode mode = wxFromStart)
-     { return m_parent_i_stream->SeekI(pos, mode); }
-  virtual off_t TellI() const
-     { return m_parent_i_stream->TellI(); }
+protected:
+    void GetFromBuffer(void *buffer, size_t size);
+    void PutToBuffer(const void *buffer, size_t size);

 
 

-  virtual bool Eof() const { return m_parent_i_stream->Eof(); } 
-  virtual size_t LastRead() const { return m_parent_i_stream->LastRead(); } 
+    char *m_buffer_start, *m_buffer_end, *m_buffer_pos;
+    size_t m_buffer_size;

 
 

- protected:
-  wxInputStream *m_parent_i_stream;
+    bool m_fixed, m_flushable;
+
+    wxStreamBase *m_stream;
+    BufMode m_mode;
+    bool m_destroybuf, m_destroystream;

 };
 
 };
 

-class wxFilterOutputStream: public wxOutputStream {
- public:
-  wxFilterOutputStream(wxOutputStream& stream);
-  virtual ~wxFilterOutputStream();
+// ---------------------------------------------------------------------------
+// wxBufferedStreams
+// ---------------------------------------------------------------------------
+
+class WXDLLEXPORT wxBufferedInputStream: public wxFilterInputStream
+{
+public:
+    wxBufferedInputStream(wxInputStream& stream);
+    ~wxBufferedInputStream();
+
+    char Peek();
+    wxInputStream& Read(void *buffer, size_t size);
+
+    // Position functions
+    off_t SeekI(off_t pos, wxSeekMode mode = wxFromStart);
+    off_t TellI() const;

 
 

-  virtual wxOutputStream& Write(const void *buffer, size_t size)
-     { return m_parent_o_stream->Write(buffer, size); }
-  virtual off_t SeekO(off_t pos, wxSeekMode mode = wxFromStart)
-     { return m_parent_o_stream->SeekO(pos, mode); }
-  virtual off_t TellO() const
-     { return m_parent_o_stream->TellO(); }
+    wxStreamBuffer *InputStreamBuffer() const { return m_i_streambuf; }

 
 

-  virtual bool Bad() const { return m_parent_o_stream->Bad(); }
-  virtual size_t LastWrite() const { return m_parent_o_stream->LastWrite(); }
+protected:
+    size_t OnSysRead(void *buffer, size_t bufsize);
+    off_t OnSysSeek(off_t seek, wxSeekMode mode);
+    off_t OnSysTell() const;

 
 

- protected:
-  wxOutputStream *m_parent_o_stream;
+    wxStreamBuffer *m_i_streambuf;

 };
 
 };
 

+class WXDLLEXPORT wxBufferedOutputStream: public wxFilterOutputStream
+{
+public:
+    wxBufferedOutputStream(wxOutputStream& stream);
+    ~wxBufferedOutputStream();
+
+    wxOutputStream& Write(const void *buffer, size_t size);
+
+    // Position functions
+    off_t SeekO(off_t pos, wxSeekMode mode = wxFromStart);
+    off_t TellO() const;
+
+    void Sync();
+
+    size_t GetSize() const;
+
+    wxStreamBuffer *OutputStreamBuffer() const { return m_o_streambuf; }
+
+protected:
+    size_t OnSysWrite(const void *buffer, size_t bufsize);
+    off_t OnSysSeek(off_t seek, wxSeekMode mode);
+    off_t OnSysTell() const;
+
+    wxStreamBuffer *m_o_streambuf;
+};
+
+#endif
+  // wxUSE_STREAMS
+

 #endif
 #endif

+  // _WX_WXSTREAM_H__