#include "wx/string.h"
#include "wx/filefn.h" // for off_t, wxInvalidOffset and wxSeekMode
+class WXDLLEXPORT wxStreamBase;
class WXDLLEXPORT wxInputStream;
class WXDLLEXPORT wxOutputStream;
class WXDLLEXPORT wxStreamBuffer {
public:
- wxStreamBuffer(wxInputStream& stream);
- wxStreamBuffer(wxOutputStream& stream);
+ typedef enum {
+ read = 0, write, read_write
+ } BufMode;
+
+ // -----------
+ // ctor & dtor
+ // -----------
+ wxStreamBuffer(wxStreamBase& stream, BufMode mode);
+ wxStreamBuffer(BufMode mode);
+ wxStreamBuffer(const wxStreamBuffer& buf);
~wxStreamBuffer();
- void Read(void *buffer, size_t size);
- void Write(const void *buffer, size_t size);
- void WriteBack(char c);
-
+ // -----------
+ // 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);
+
+ size_t WriteBack(const char *buffer, size_t size);
+ bool WriteBack(char c);
+ 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);
- void ResetBuffer();
-
- void SetBufferPosition(char *buffer_position)
- { m_buffer_pos = buffer_position; }
- void SetIntPosition(size_t pos)
- { m_buffer_pos = m_buffer_start + pos; }
- char *GetBufferPosition() const { return m_buffer_pos; }
- size_t GetIntPosition() const { return m_buffer_pos - m_buffer_start; }
-
- char *GetBufferStart() const { return m_buffer_start; }
- char *GetBufferEnd() const { return m_buffer_end; }
- size_t GetBufferSize() const { return m_buffer_size; }
- size_t GetLastAccess() const { return m_buffer_end - m_buffer_start; }
+ 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();
+
+ // --------------
+ // Administration
+ // --------------
+ wxStreamBase *Stream() { return m_stream; }
+
+ protected:
+ char *AllocSpaceWBack(size_t needed_size);
+ size_t GetWBack(char *buf, size_t bsize);
+
+ void GetFromBuffer(void *buffer, size_t size);
+ void PutToBuffer(const void *buffer, size_t size);
protected:
char *m_buffer_start, *m_buffer_end, *m_buffer_pos;
size_t m_buffer_size;
- wxInputStream *m_istream;
- wxOutputStream *m_ostream;
+ char *m_wback;
+ size_t m_wbacksize, m_wbackcur;
+
+ bool m_fixed, m_flushable;
+
+ wxStreamBase *m_stream;
+ BufMode m_mode;
+ bool m_destroybuf, m_destroystream;
};
// ---------------------------------------------------------------------------
// wxStream: base classes
// ---------------------------------------------------------------------------
-class WXDLLEXPORT wxInputStream {
+typedef enum {
+ wxStream_NOERROR,
+ wxStream_EOF
+} wxStreamError;
+
+class WXDLLEXPORT wxStreamBase {
+ public:
+ wxStreamBase();
+ virtual ~wxStreamBase();
+
+ wxStreamError LastError() const { return m_lasterror; }
+ virtual size_t StreamSize() const { return ~((size_t)0); }
+
+ protected:
+ friend class wxStreamBuffer;
+
+ 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;
+
+ protected:
+ size_t m_lastcount;
+ wxStreamError m_lasterror;
+};
+
+class WXDLLEXPORT wxInputStream: public wxStreamBase {
public:
wxInputStream();
+ wxInputStream(wxStreamBuffer *sbuf);
virtual ~wxInputStream();
// IO functions
- virtual char Peek() { return 0; }
- virtual char GetC();
- virtual wxInputStream& Read(void *buffer, size_t size);
+ virtual char Peek();
+ char GetC();
+ 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;
+ off_t SeekI(off_t pos, wxSeekMode mode = wxFromStart);
+ off_t TellI() const;
// State functions
- bool Eof() const { return m_eof; }
- size_t LastRead() { return m_lastread; }
wxStreamBuffer *InputStreamBuffer() { return m_i_streambuf; }
+ size_t LastRead() { return wxStreamBase::m_lastcount; }
// Operators
wxInputStream& operator>>(wxOutputStream& out) { return Read(out); }
wxInputStream& operator>>(short& i);
wxInputStream& operator>>(int& i);
wxInputStream& operator>>(long& i);
- wxInputStream& operator>>(float& i);
-#if USE_SERIAL
+ wxInputStream& operator>>(double& i);
+#if wxUSE_SERIAL
wxInputStream& operator>>(wxObject *& obj);
#endif
+ wxInputStream& operator>>(float& f) { double d; operator>>((double&)d); f = (float)d; return *this; }
wxInputStream& operator>>(unsigned char& c) { return operator>>((char&)c); }
wxInputStream& operator>>(unsigned short& i) { return operator>>((short&)i); }
wxInputStream& operator>>(unsigned int& i) { return operator>>((int&)i); }
wxInputStream& operator>>( __wxInputManip func) { return func(*this); }
protected:
- friend class wxStreamBuffer;
- friend class wxFilterInputStream;
-
- wxInputStream(wxStreamBuffer *buffer);
-
- virtual size_t DoRead(void *WXUNUSED(buffer), size_t WXUNUSED(size) )
- { return 0; }
- virtual off_t DoSeekInput( off_t WXUNUSED(pos), wxSeekMode WXUNUSED(mode) )
- { return wxInvalidOffset; }
- virtual off_t DoTellInput() const
- { return wxInvalidOffset; }
-
- protected:
- bool m_eof, m_i_destroybuf;
- size_t m_lastread;
+ bool m_i_destroybuf;
wxStreamBuffer *m_i_streambuf;
};
-class WXDLLEXPORT wxOutputStream {
+class WXDLLEXPORT wxOutputStream: public wxStreamBase {
public:
wxOutputStream();
+ wxOutputStream(wxStreamBuffer *sbuf);
virtual ~wxOutputStream();
- virtual wxOutputStream& Write(const void *buffer, size_t size);
+ 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;
+ off_t SeekO(off_t pos, wxSeekMode mode = wxFromStart);
+ off_t TellO() const;
- virtual bool Bad() const { return m_bad; }
- virtual size_t LastWrite() const { return m_lastwrite; }
+ size_t LastWrite() const { return wxStreamBase::m_lastcount; }
wxStreamBuffer *OutputStreamBuffer() { return m_o_streambuf; }
- virtual void Sync();
+ void Sync();
wxOutputStream& operator<<(wxInputStream& out) { return Write(out); }
wxOutputStream& operator<<(const char *string);
wxOutputStream& operator<<(int i);
wxOutputStream& operator<<(long i);
wxOutputStream& operator<<(double f);
-#if USE_SERIAL
+#if wxUSE_SERIAL
wxOutputStream& operator<<(wxObject& obj);
#endif
wxOutputStream& operator<<( __wxOutputManip func) { return func(*this); }
protected:
- friend class wxStreamBuffer;
- friend class wxFilterOutputStream;
-
- wxOutputStream(wxStreamBuffer *buffer);
-
- virtual size_t DoWrite( const void *WXUNUSED(buffer), size_t WXUNUSED(size) )
- { return 0; }
- virtual off_t DoSeekOutput( off_t WXUNUSED(pos), wxSeekMode WXUNUSED(mode) )
- { return wxInvalidOffset; }
- virtual off_t DoTellOutput() const
- { return wxInvalidOffset; }
-
- protected:
- bool m_bad, m_o_destroybuf;
- size_t m_lastwrite;
+ bool m_o_destroybuf;
wxStreamBuffer *m_o_streambuf;
};
-class wxStream: public virtual wxInputStream,
- public virtual wxOutputStream
-{
- public:
- wxStream();
-};
-
// ---------------------------------------------------------------------------
// "Filter" streams
// ---------------------------------------------------------------------------
-class WXDLLEXPORT wxFilterInputStream: public virtual wxInputStream {
+class WXDLLEXPORT wxFilterInputStream: public wxInputStream {
public:
wxFilterInputStream();
wxFilterInputStream(wxInputStream& stream);
char Peek() { return m_parent_i_stream->Peek(); }
- bool Eof() const { return m_parent_i_stream->Eof(); }
- size_t LastRead() const { return m_parent_i_stream->LastRead(); }
- off_t TellI() const { return m_parent_i_stream->TellI(); }
-
- protected:
- size_t DoRead(void *buffer, size_t size);
- off_t DoSeekInput(off_t pos, wxSeekMode mode);
- off_t DoTellInput() const;
+ wxStreamError LastError() const { return m_parent_i_stream->LastError(); }
+ size_t StreamSize() const { return m_parent_i_stream->StreamSize(); }
protected:
wxInputStream *m_parent_i_stream;
};
-class WXDLLEXPORT wxFilterOutputStream: public virtual wxOutputStream {
+class WXDLLEXPORT wxFilterOutputStream: public wxOutputStream {
public:
wxFilterOutputStream();
wxFilterOutputStream(wxOutputStream& stream);
- virtual ~wxFilterOutputStream();
-
- bool Bad() const { return m_parent_o_stream->Bad(); }
- size_t LastWrite() const { return m_parent_o_stream->LastWrite(); }
- off_t TellO() const { return m_parent_o_stream->TellO(); }
+ ~wxFilterOutputStream();
- protected:
- // The forward is implicitely done by wxStreamBuffer.
-
- size_t DoWrite(const void *buffer, size_t size);
- off_t DoSeekOutput(off_t pos, wxSeekMode mode);
- off_t DoTellOutput() const;
+ wxStreamError LastError() const { return m_parent_o_stream->LastError(); }
+ size_t StreamSize() const { return m_parent_o_stream->StreamSize(); }
protected:
wxOutputStream *m_parent_o_stream;
};
-class WXDLLEXPORT wxFilterStream: public wxStream,
- public virtual wxFilterInputStream,
- public virtual wxFilterOutputStream {
- public:
- wxFilterStream(wxStream& stream);
- wxFilterStream();
-};
-
#endif
projects / wxWidgets.git / blobdiff