-class WXDLLEXPORT wxStreamBuffer {
- public:
- typedef enum {
- read = 0, write, read_write
- } BufMode;
-
- // -----------
- // ctor & dtor
- // -----------
- 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);
-
- 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);
- 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;
-
- 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;
+enum wxStreamError
+{
+ 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
+};
+
+// compatibility
+#define wxStream_NOERROR wxSTREAM_NOERROR
+#define wxStream_EOF wxSTREAM_EOF
+#define wxStream_WRITE_ERR wxSTREAM_WRITE_ERROR
+#define wxStream_READ_ERR wxSTREAM_READ_ERROR
+
+class WXDLLEXPORT wxStreamBase
+{
+public:
+ wxStreamBase();
+ virtual ~wxStreamBase();
+
+ // error testing
+ wxStreamError GetLastError() const { return m_lasterror; }
+ bool IsOk() const { return LastError() == wxSTREAM_NOERROR; }
+ bool operator!() const { return LastError() != wxSTREAM_NOERROR; }
+
+ virtual size_t GetSize() const { return 0; }
+
+ // deprecated, for compatibility only
+ wxStreamError LastError() const { return m_lasterror; }
+ size_t StreamSize() const { return GetSize(); }
+
+protected:
+ // VZ: these functions are really pure virtual and shouldn't be declared
+ // in the base class because it creates ambiguties in stream classes
+ // deriving from both wxInputStream and wxOutputStream
+#if 0
+ virtual size_t OnSysRead(void *buffer, size_t bufsize);
+ virtual size_t OnSysWrite(const void *buffer, size_t bufsize);
+#endif
+
+ 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 : /* virtual */ public wxStreamBase
+{
+public:
+ wxInputStream();
+ virtual ~wxInputStream();
+
+ // is the stream at EOF?
+ virtual bool Eof() const;
+
+ // 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); }
+ wxInputStream& operator>>( __wxInputManip func) { return func(*this); }
+
+protected:
+ // to be implemented in the derived classes (it should have been pure
+ // virtual)
+ virtual size_t OnSysRead(void *buffer, size_t bufsize);
+
+ // Ungetch managers
+ char *m_wback;
+ size_t m_wbacksize;
+ size_t m_wbackcur;
+
+ char *AllocSpaceWBack(size_t needed_size);
+ size_t GetWBack(void *buf, size_t bsize);
+
+ friend class wxStreamBuffer;
+};
+
+class WXDLLEXPORT wxOutputStream : /* virtual */ 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;
+
+ virtual size_t LastWrite() const { return wxStreamBase::m_lastcount; }
+
+ virtual void Sync();
+
+ wxOutputStream& operator<<(wxInputStream& out) { return Write(out); }
+ wxOutputStream& operator<<( __wxOutputManip func) { return func(*this); }
+
+protected:
+ // to be implemented in the derived classes (it should have been pure
+ // virtual)
+ virtual size_t OnSysWrite(const void *buffer, size_t bufsize);
+
+ friend class wxStreamBuffer;
projects / wxWidgets.git / blobdiff