Fixed compilation error on OS/2 (strnlen declaration was not visible).

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

diff --git a/include/wx/ipcbase.h b/include/wx/ipcbase.h
index 48f4d5c33a58d06fcfd89efc568d8ab15266aaac..ae4bbca0a6c3fa6752830ca2bf24e2195cf71bdb 100644 (file)
--- a/include/wx/ipcbase.h
+++ b/include/wx/ipcbase.h
@@ -127,11 +127,25 @@ public:
 
 
   // Callbacks to SERVER - override at will
-  virtual bool OnExecute(const wxString& WXUNUSED(topic),
-                         const void *WXUNUSED(data),
-                         size_t WXUNUSED(size),
-                         wxIPCFormat WXUNUSED(format))
-      { return false; }
+  virtual bool OnExec(const wxString& WXUNUSED(topic),
+                      const wxString& WXUNUSED(data))
+  {
+      wxFAIL_MSG( "This method shouldn't be called, if it is, it probably "
+                  "means that you didn't update your old code overriding "
+                  "OnExecute() to use the new parameter types (\"const void *\" "
+                  "instead of \"wxChar *\" and \"size_t\" instead of \"int\"), "
+                  "you must do it or your code wouldn't be executed at all!" );
+      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),
@@ -166,6 +180,28 @@ public:
   virtual bool OnDisconnect() { delete this; return true; }
 
 
+  // return true if this is one of the formats used for textual data
+  // transmission
+  static bool IsTextFormat(wxIPCFormat format)
+  {
+      return format == wxIPC_TEXT ||
+             format == wxIPC_UTF8TEXT ||
+             format == wxIPC_UTF16TEXT ||
+             format == wxIPC_UTF32TEXT;
+  }
+
+  // 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 (i.e.
+  // such that IsTextFormat(format) doesn't return true)
+  //
+  // 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);
@@ -186,7 +222,7 @@ private:
 protected:
   bool          m_connected;
 
-  DECLARE_NO_ASSIGN_CLASS(wxConnectionBase);
+  DECLARE_NO_ASSIGN_CLASS(wxConnectionBase)
   DECLARE_CLASS(wxConnectionBase)
 };