X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/219f895a273cdf12ded3f79dbbcd1e076fe83901..2d996ed1c44a591c610e51d58d0bf9f802fac165:/include/wx/stream.h

diff --git a/include/wx/stream.h b/include/wx/stream.h
index 8ee9d1b8df..efef1ec113 100644
--- a/include/wx/stream.h
+++ b/include/wx/stream.h
@@ -9,104 +9,313 @@
 // Licence:     wxWindows license
 /////////////////////////////////////////////////////////////////////////////
 
-#ifndef __WXSTREAM_H__
-#define __WXSTREAM_H__
+#ifndef _WX_WXSTREAM_H__
+#define _WX_WXSTREAM_H__
 
 #ifdef __GNUG__
 #pragma interface
 #endif
 
+#include "wx/defs.h"
+
+#if wxUSE_STREAMS
+
 #include <stdio.h>
-#include <wx/object.h>
-#include <wx/string.h>
+#include "wx/object.h"
+#include "wx/string.h"
+#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
- */
+// ---------------------------------------------------------------------------
+// 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 {
-  wxBeginPosition = 0, wxCurrentPosition = 1, wxEndPosition = 2
-} wxWhenceType;
+  wxStream_NOERROR = 0,
+  wxStream_EOF,
+  wxStream_WRITE_ERR,
+  wxStream_READ_ERR
+} wxStreamError;
 
-class wxOutputStream;
-class wxInputStream: public wxObject {
-  DECLARE_ABSTRACT_CLASS(wxInputStream)
+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;
+
+ protected:
+  friend class wxStreamBuffer;
+
+  size_t m_lastcount;
+  wxStreamError m_lasterror;
+};
+
+class WXDLLEXPORT wxInputStream: public wxStreamBase {
  public:
   wxInputStream();
   virtual ~wxInputStream();
 
-  virtual wxInputStream& Read(void *buffer, size_t size) = 0;
+  // IO functions
+  virtual char Peek();
+  char GetC();
+  virtual wxInputStream& Read(void *buffer, size_t size);
   wxInputStream& Read(wxOutputStream& stream_out);
 
-  virtual size_t SeekI(int pos, wxWhenceType whence = wxBeginPosition) = 0;
-  virtual size_t TellI() const = 0;
+  // 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);
 
-  virtual bool Eof() const = 0;
-  virtual size_t LastRead() const = 0;
 };
 
-class wxOutputStream: public wxObject {
-  DECLARE_ABSTRACT_CLASS(wxOutputStream)
+class WXDLLEXPORT wxOutputStream: public wxStreamBase {
  public:
   wxOutputStream();
   virtual ~wxOutputStream();
 
-  virtual wxOutputStream& Write(const void *buffer, size_t size) = 0;
+  virtual wxOutputStream& Write(const void *buffer, size_t size);
   wxOutputStream& Write(wxInputStream& stream_in);
 
-  virtual size_t SeekO(int pos, wxWhenceType whence = wxBeginPosition) = 0;
-  virtual size_t TellO() const = 0;
+  virtual off_t SeekO(off_t pos, wxSeekMode mode = wxFromStart);
+  virtual off_t TellO() const;
 
-  virtual bool Bad() const = 0;
-  virtual size_t LastWrite() const = 0;
+  virtual size_t LastWrite() const { return wxStreamBase::m_lastcount; }
 
-  virtual void Sync() {}
+  virtual void Sync();
+
+  wxOutputStream& operator<<(wxInputStream& out) { return Write(out); }
+#if wxUSE_SERIAL
+  wxOutputStream& operator<<(wxObject& obj);
+#endif
+  wxOutputStream& operator<<( __wxOutputManip func) { return func(*this); }
 };
 
-class wxStream: public wxInputStream, public wxOutputStream {
-  DECLARE_ABSTRACT_CLASS(wxStream)
+// ---------------------------------------------------------------------------
+// A stream for measuring streamed output
+// ---------------------------------------------------------------------------
+
+class wxCountingOutputStream: public wxOutputStream {
  public:
-  wxStream() : wxInputStream(), wxOutputStream() {}
-  virtual ~wxStream() {}
+  wxCountingOutputStream();
+
+  size_t GetSize() const;
+  bool Ok() const { return TRUE; }
+
+ protected:
+
+  size_t OnSysWrite(const void *buffer, size_t size);
+  off_t OnSysSeek(off_t pos, wxSeekMode mode);
+  off_t OnSysTell() const;
+
+ protected:
+  size_t m_currentPos;
 };
 
-/*
- * "Filter" streams
- */
 
-class wxFilterInputStream: public wxInputStream {
-  DECLARE_CLASS(wxFilterInputStream)
+// ---------------------------------------------------------------------------
+// "Filter" streams
+// ---------------------------------------------------------------------------
+
+class WXDLLEXPORT wxFilterInputStream: public wxInputStream {
  public:
+  wxFilterInputStream();
   wxFilterInputStream(wxInputStream& stream);
-  virtual ~wxFilterInputStream();
+  ~wxFilterInputStream();
+
+  char Peek() { return m_parent_i_stream->Peek(); }
 
-  virtual wxInputStream& Read(void *buffer, size_t size)
-     { return m_parent_i_stream->Read(buffer, size); }
-  virtual size_t SeekI(int pos, wxWhenceType whence = wxBeginPosition)
-     { return m_parent_i_stream->SeekI(pos, whence); }
+  size_t GetSize() const { return m_parent_i_stream->GetSize(); }
 
-  virtual bool Eof() const { return m_parent_i_stream->Eof(); } 
-  virtual size_t LastRead() const { return m_parent_i_stream->LastRead(); } 
  protected:
   wxInputStream *m_parent_i_stream;
 };
 
-class wxFilterOutputStream: public wxOutputStream {
-  DECLARE_CLASS(wxFilterOutputStream)
+class WXDLLEXPORT wxFilterOutputStream: public wxOutputStream {
  public:
+  wxFilterOutputStream();
   wxFilterOutputStream(wxOutputStream& stream);
-  virtual ~wxFilterOutputStream();
+  ~wxFilterOutputStream();
 
-  virtual wxOutputStream& Write(const void *buffer, size_t size)
-     { return m_parent_o_stream->Write(buffer, size); }
-  virtual size_t SeekO(int pos, wxWhenceType whence = wxBeginPosition)
-     { return m_parent_o_stream->SeekO(pos, whence); }
-
-  virtual bool Bad() const { return m_parent_o_stream->Bad(); }
-  virtual size_t LastWrite() const { return m_parent_o_stream->LastWrite(); }
+  size_t GetSize() const { return m_parent_o_stream->GetSize(); }
 
  protected:
   wxOutputStream *m_parent_o_stream;
 };
 
+// ---------------------------------------------------------------------------
+// Stream buffer
+// ---------------------------------------------------------------------------
+
+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);
+
+  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();
+
+  // --------------
+  // Administration
+  // --------------
+  wxStreamBase *Stream() { return m_stream; }
+
+ protected:
+  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;
+};
+
+// ---------------------------------------------------------------------------
+// wxBufferedStreams
+// ---------------------------------------------------------------------------
+
+class 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;
+
+  wxStreamBuffer *InputStreamBuffer() const { return m_i_streambuf; }
+
+ protected:
+  size_t OnSysRead(void *buffer, size_t bufsize);
+  off_t OnSysSeek(off_t seek, wxSeekMode mode);
+  off_t OnSysTell() const;  
+
+ protected:
+  wxStreamBuffer *m_i_streambuf;
+};
+
+class 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();
+
+  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;  
+
+ protected:
+  wxStreamBuffer *m_o_streambuf;
+};
+
+#endif
+  // wxUSE_STREAMS
+
 #endif
+  // _WX_WXSTREAM_H__