corrected inverted test in IsEmpty() (patch 1936052)

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

diff --git a/include/wx/ipcbase.h b/include/wx/ipcbase.h
index 44c594b45dcd5687f3d675249ee41bb00514dc38..56de3c8d35fc720f595910d818e84f9218bb4007 100644 (file)
--- a/include/wx/ipcbase.h
+++ b/include/wx/ipcbase.h
@@ -5,93 +5,242 @@
 // Modified by:
 // Created:     4/1/98
 // RCS-ID:      $Id$
 // Modified by:
 // Created:     4/1/98
 // RCS-ID:      $Id$

-// Copyright:   (c) Julian Smart and Markus Holzem
-// Licence:    wxWindows license
+// Copyright:   (c) Julian Smart
+// Licence:     wxWindows licence

 /////////////////////////////////////////////////////////////////////////////
 
 /////////////////////////////////////////////////////////////////////////////
 

-#ifndef __IPCBASEH__
-#define __IPCBASEH__
-
-#ifdef __GNUG__
-#pragma interface "ipcbase.h"
-#endif
+#ifndef _WX_IPCBASEH__
+#define _WX_IPCBASEH__

 
 #include "wx/defs.h"
 #include "wx/object.h"
 #include "wx/string.h"
 
 
 #include "wx/defs.h"
 #include "wx/object.h"
 #include "wx/string.h"
 

-class WXDLLEXPORT wxDDEServerBase;
-class WXDLLEXPORT wxDDEClientBase;
+enum wxIPCFormat
+{
+  wxIPC_INVALID =          0,
+  wxIPC_TEXT =             1,  /* CF_TEXT */
+  wxIPC_BITMAP =           2,  /* CF_BITMAP */
+  wxIPC_METAFILE =         3,  /* CF_METAFILEPICT */
+  wxIPC_SYLK =             4,
+  wxIPC_DIF =              5,
+  wxIPC_TIFF =             6,
+  wxIPC_OEMTEXT =          7,  /* CF_OEMTEXT */
+  wxIPC_DIB =              8,  /* CF_DIB */
+  wxIPC_PALETTE =          9,
+  wxIPC_PENDATA =          10,
+  wxIPC_RIFF =             11,
+  wxIPC_WAVE =             12,
+  wxIPC_UTF16TEXT =        13, /* CF_UNICODE */
+  wxIPC_ENHMETAFILE =      14,
+  wxIPC_FILENAME =         15, /* CF_HDROP */
+  wxIPC_LOCALE =           16,
+  wxIPC_UTF8TEXT =         17,
+  wxIPC_UTF32TEXT =        18,
+#if SIZEOF_WCHAR_T == 2
+  wxIPC_UNICODETEXT = wxIPC_UTF16TEXT,
+#elif SIZEOF_WCHAR_T == 4
+  wxIPC_UNICODETEXT = wxIPC_UTF32TEXT,
+#else
+#  error "Unknown wchar_t size"
+#endif
+  wxIPC_PRIVATE =          20
+};
+
+class WXDLLIMPEXP_FWD_BASE wxServerBase;
+class WXDLLIMPEXP_FWD_BASE wxClientBase;

 
 

-class WXDLLEXPORT wxConnectionBase: public wxObject
+class WXDLLIMPEXP_BASE wxConnectionBase: public wxObject

 {
 {

-  DECLARE_CLASS(wxConnectionBase)
- public:
-  inline wxConnectionBase(void) {}
-  inline ~wxConnectionBase(void) {}
+public:
+  wxConnectionBase(void *buffer, size_t size); // use external buffer
+  wxConnectionBase(); // use internal, adaptive buffer
+  wxConnectionBase(const wxConnectionBase& copy);
+  virtual ~wxConnectionBase();
+
+  void SetConnected( bool c ) { m_connected = c; }
+  bool GetConnected() { return m_connected; }

 
   // Calls that CLIENT can make
 
   // Calls that CLIENT can make

-  virtual bool Execute(char *data, int size = -1, wxDataFormat format = wxDF_TEXT ) = 0;
-  virtual bool Execute(const wxString& str) { return Execute((char *)(const char *)str, -1, wxDF_TEXT); }
-  virtual char *Request(const wxString& item, int *size = NULL, wxDataFormat format = wxDF_TEXT) = 0;
-  virtual bool Poke(const wxString& item, char *data, int size = -1, wxDataFormat format = wxDF_TEXT) = 0;
+  bool Execute(const void *data, size_t size, wxIPCFormat fmt = wxIPC_PRIVATE)
+      { return DoExecute(data, size, fmt); }
+  bool Execute(const char *s, size_t size = wxNO_LEN)
+      { return DoExecute(s, size == wxNO_LEN ? strlen(s) + 1
+                                             : size, wxIPC_TEXT); }
+  bool Execute(const wchar_t *ws, size_t size = wxNO_LEN)
+      { return DoExecute(ws, size == wxNO_LEN ? (wcslen(ws) + 1)*sizeof(wchar_t)
+                                              : size, wxIPC_UNICODETEXT); }
+  bool Execute(const wxString& s)
+  {
+      const wxUTF8Buf buf = s.utf8_str();
+      return DoExecute(buf, strlen(buf) + 1, wxIPC_UTF8TEXT);
+  }
+  bool Execute(const wxCStrData& cs)
+      { return Execute(cs.AsString()); }
+
+  virtual const void *Request(const wxString& item,
+                              size_t *size = NULL,
+                              wxIPCFormat format = wxIPC_TEXT) = 0;
+
+  bool Poke(const wxString& item, const void *data, size_t size,
+            wxIPCFormat fmt = wxIPC_PRIVATE)
+      { return DoPoke(item, data, size, fmt); }
+  bool Poke(const wxString& item, const char *s, size_t size = wxNO_LEN)
+      { return DoPoke(item, s, size == wxNO_LEN ? strlen(s) + 1
+                                                : size, wxIPC_TEXT); }
+  bool Poke(const wxString& item, const wchar_t *ws, size_t size = wxNO_LEN)
+      { return DoPoke(item, ws,
+                      size == wxNO_LEN ? (wcslen(ws) + 1)*sizeof(wchar_t)
+                                       : size, wxIPC_UNICODETEXT); }
+  bool Poke(const wxString& item, const wxString s)
+  {
+      const wxUTF8Buf buf = s.utf8_str();
+      return DoPoke(item, buf,  strlen(buf) + 1, wxIPC_UTF8TEXT);
+  }
+  bool Poke(const wxString& item, const wxCStrData& cs)
+      { return Poke(item, cs.AsString()); }
+

   virtual bool StartAdvise(const wxString& item) = 0;
   virtual bool StopAdvise(const wxString& item) = 0;
 
   // Calls that SERVER can make
   virtual bool StartAdvise(const wxString& item) = 0;
   virtual bool StopAdvise(const wxString& item) = 0;
 
   // Calls that SERVER can make

-  virtual bool Advise(const wxString& item, char *data, int size = -1, wxDataFormat format = wxDF_TEXT) = 0;
+  bool Advise(const wxString& item, const void *data, size_t size,
+              wxIPCFormat fmt = wxIPC_PRIVATE)
+      { return DoAdvise(item, data, size, fmt); }
+  bool Advise(const wxString& item, const char *s, size_t size = wxNO_LEN)
+      { return DoAdvise(item, s, size == wxNO_LEN ? strlen(s) + 1
+                                                  : size, wxIPC_TEXT); }
+  bool Advise(const wxString& item, const wchar_t *ws, size_t size = wxNO_LEN)
+      { return DoAdvise(item, ws,
+                        size == wxNO_LEN ? (wcslen(ws) + 1)*sizeof(wchar_t)
+                                         : size, wxIPC_UNICODETEXT); }
+  bool Advise(const wxString& item, const wxString s)
+  {
+      const wxUTF8Buf buf = s.utf8_str();
+      return DoAdvise(item, buf,  strlen(buf) + 1, wxIPC_UTF8TEXT);
+  }
+  bool Advise(const wxString& item, const wxCStrData& cs)
+      { return Advise(item, cs.AsString()); }

 
   // Calls that both can make
 
   // Calls that both can make

-  virtual bool Disconnect(void) = 0;
+  virtual bool Disconnect() = 0;
+

 
   // Callbacks to SERVER - override at will
 
   // Callbacks to SERVER - override at will

-  virtual bool OnExecute( const wxString& WXUNUSED(topic), char *WXUNUSED(data), int WXUNUSED(size), 
-                          int WXUNUSED(format) ) { return FALSE; };
-  virtual char *OnRequest( const wxString& WXUNUSED(topic), const wxString& WXUNUSED(item), 
-                           int *WXUNUSED(size), int WXUNUSED(format) ) { return NULL; };
-  virtual bool OnPoke( const wxString& WXUNUSED(topic), const wxString& WXUNUSED(item), char *WXUNUSED(data), 
-                      int WXUNUSED(size), int WXUNUSED(format) ) { return FALSE; };
-  virtual bool OnStartAdvise( const wxString& WXUNUSED(topic), const wxString& WXUNUSED(item) ) 
-                              { return FALSE; };
-  virtual bool OnStopAdvise( const wxString& WXUNUSED(topic), const wxString& WXUNUSED(item) ) 
-                             { return FALSE; };
+  virtual bool OnExec(const wxString& WXUNUSED(topic),
+                      const wxString& WXUNUSED(data))
+      { return false; }
+
+  // deprecated function kept for backwards compatibility: usually you will
+  // want to override OnExec() above instead which receives its data in a more
+  // convenient format
+  virtual bool OnExecute(const wxString& topic,
+                         const void *data,
+                         size_t size,
+                         wxIPCFormat format)
+      { return OnExec(topic, GetTextFromData(data, size, format)); }
+
+  virtual const void *OnRequest(const wxString& WXUNUSED(topic),
+                                const wxString& WXUNUSED(item),
+                                size_t *size,
+                                wxIPCFormat WXUNUSED(format))
+      { *size = 0; return NULL; }
+
+  virtual bool OnPoke(const wxString& WXUNUSED(topic),
+                      const wxString& WXUNUSED(item),
+                      const void *WXUNUSED(data),
+                      size_t WXUNUSED(size),
+                      wxIPCFormat WXUNUSED(format))
+      { return false; }
+
+  virtual bool OnStartAdvise(const wxString& WXUNUSED(topic),
+                             const wxString& WXUNUSED(item))
+      { return false; }
+
+  virtual bool OnStopAdvise(const wxString& WXUNUSED(topic),
+                            const wxString& WXUNUSED(item))
+      { return false; }

 
   // Callbacks to CLIENT - override at will
 
   // Callbacks to CLIENT - override at will

-  virtual bool OnAdvise( const wxString& WXUNUSED(topic), const wxString& WXUNUSED(item), char *WXUNUSED(data), 
-                        int WXUNUSED(size), int WXUNUSED(format) ) { return FALSE; };
+  virtual bool OnAdvise(const wxString& WXUNUSED(topic),
+                        const wxString& WXUNUSED(item),
+                        const void *WXUNUSED(data),
+                        size_t WXUNUSED(size),
+                        wxIPCFormat WXUNUSED(format))
+      { return false; }

 
   // Callbacks to BOTH
 
   // Callbacks to BOTH

+  virtual bool OnDisconnect() { delete this; return true; }
+
+
+  // converts from the data and format into a wxString automatically
+  //
+  // this function accepts data in all of wxIPC_TEXT, wxIPC_UNICODETEXT, and
+  // wxIPC_UTF8TEXT formats but asserts if the format is anything else
+  //
+  // notice that the size parameter here contains the total size of the data,
+  // including the terminating '\0' or L'\0'
+  static
+  wxString GetTextFromData(const void *data, size_t size, wxIPCFormat format);
+
+
+  // return a buffer at least this size, reallocating buffer if needed
+  // returns NULL if using an inadequate user buffer which can't be resized
+  void *GetBufferAtLeast(size_t bytes);
+
+protected:
+  virtual bool DoExecute(const void *data, size_t size, wxIPCFormat format) = 0;
+  virtual bool DoPoke(const wxString& item, const void *data, size_t size,
+                      wxIPCFormat format) = 0;
+  virtual bool DoAdvise(const wxString& item, const void *data, size_t size,
+                        wxIPCFormat format) = 0;
+

 
 

-  // Default behaviour is to delete connection and return TRUE
-  virtual bool OnDisconnect(void) = 0;
+private:
+  char         *m_buffer;
+  size_t        m_buffersize;
+  bool          m_deletebufferwhendone;
+
+protected:
+  bool          m_connected;
+
+  DECLARE_NO_ASSIGN_CLASS(wxConnectionBase)
+  DECLARE_CLASS(wxConnectionBase)

 };
 
 };
 

-class WXDLLEXPORT wxServerBase: public wxObject
+
+class WXDLLIMPEXP_BASE wxServerBase : public wxObject

 {
 {

-  DECLARE_CLASS(wxServerBase)
- public:
+public:
+  wxServerBase() { }
+  virtual ~wxServerBase() { }
+
+  // Returns false on error (e.g. port number is already in use)
+  virtual bool Create(const wxString& serverName) = 0;

 
 

-  inline wxServerBase(void) {}
-  inline ~wxServerBase(void) {};
-  virtual bool Create(const wxString& serverName) = 0; // Returns FALSE if can't create server (e.g. port
-                                  // number is already in use)
+  // Callbacks to SERVER - override at will

   virtual wxConnectionBase *OnAcceptConnection(const wxString& topic) = 0;
 
   virtual wxConnectionBase *OnAcceptConnection(const wxString& topic) = 0;
 

+  DECLARE_CLASS(wxServerBase)

 };
 
 };
 

-class WXDLLEXPORT wxClientBase: public wxObject
+class WXDLLIMPEXP_BASE wxClientBase : public wxObject

 {
 {

-  DECLARE_CLASS(wxClientBase)
- public:
-  inline wxClientBase(void) {};
-  inline ~wxClientBase(void) {};
+public:
+  wxClientBase() { }
+  virtual ~wxClientBase() { }
+

   virtual bool ValidHost(const wxString& host) = 0;
   virtual bool ValidHost(const wxString& host) = 0;

-  virtual wxConnectionBase *MakeConnection(const wxString& host, const wxString& server, const wxString& topic) = 0;
-                                                // Call this to make a connection.
-                                                // Returns NULL if cannot.
-  virtual wxConnectionBase *OnMakeConnection(void) = 0; // Tailor this to return own connection.

 
 

+  // Call this to make a connection. Returns NULL if cannot.
+  virtual wxConnectionBase *MakeConnection(const wxString& host,
+                                           const wxString& server,
+                                           const wxString& topic) = 0;
+
+  // Callbacks to CLIENT - override at will
+  virtual wxConnectionBase *OnMakeConnection() = 0;
+
+  DECLARE_CLASS(wxClientBase)

 };
 
 };
 

-#endif
-    // __IPCBASEH__
+#endif // _WX_IPCBASEH__