1 files changed, 108 insertions, 0 deletions
diff --git a/rhtvision/examples/dlgdsn/strmoper.cc b/rhtvision/examples/dlgdsn/strmoper.cc
new file mode 100644
index 0000000..1cc36e2
--- /dev/null
+++ b/rhtvision/examples/dlgdsn/strmoper.cc
@@ -0,0 +1,108 @@
+/***************************************************************************
+
+    strmoper.cc - Stream operations
+    ---------------------------------------------------------------------
+    May, 2000
+    Copyright (C) 2000 by Warlei Alves
+    walves@usa.net
+    
+    Modified by Salvador E. Tropea to compile without warnings.
+    For gcc 2.95.x and then 3.0.1.
+    
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+ 
+#define Uses_stdio
+#define Uses_string
+// didn't find std::ios (AP)
+#define Uses_iostream
+
+#define Uses_MsgBox
+#define Uses_TFileDialog
+#define Uses_TProgram
+#define Uses_TApplication
+#define Uses_TDeskTop
+#define Uses_ofpstream
+#define Uses_ifpstream
+
+#include <tv.h>
+#include "strmoper.h"
+
+UsingNamespaceStd
+
+bool fileExists(const char * FileName)
+{
+   FILE * test;
+   
+   bool rst = ((test = fopen(FileName, "r")) != 0);
+   if (rst) fclose(test);
+   return rst;
+}
+
+// SET: This function was originaly declared as const char * and returned a
+// pointer to a temporal variable in the stack. Nicola Asuni found it and
+// suggested a partial workaround. I then modified the function to return
+// a char * using newStr to allocate it. I also modified all the points
+// where this function is used (at least all that I found) to release the
+// returned value.
+char * getFileName(const char * aTitle, const char * ext, int Mode)
+{
+   TFileDialog *d = 0;
+   int cmd = cmCancel;
+   
+   if (Mode == 0)
+     d = (TFileDialog *) TProgram::application->validView( new
+       TFileDialog(ext, aTitle, _("File"), fdOpenButton, 100) );
+   else
+     d = (TFileDialog *) TProgram::application->validView( new
+       TFileDialog(ext, aTitle, _("File"), fdOKButton, 100) );
+   if (d != 0) cmd = TProgram::deskTop->execView( d );
+   if ( cmd != cmCancel )
+   {
+      char fileName[PATH_MAX];
+      d->getFileName( fileName );
+      delete d;
+      return newStr( fileName );
+   }
+   else return NULL;
+}
+
+
+ifpstream * openFile(const char * FileName, char * Signature)
+{
+   if (!fileExists(FileName)) return 0;
+   ifpstream * rst = new ifpstream( FileName, ios::in|ios::binary );
+   char buf[50];
+   if (rst)
+   {
+      rst->readBytes(&buf, strlen(Signature) + 1);
+      if (strcmp(buf, Signature) != 0)
+      {
+          delete rst;
+          return 0;
+      }
+   }
+   return rst;
+}
+
+ofpstream * initFile(const char * FileName, char * current, char * Signature)
+{
+   if ( fileExists(FileName) &&
+      ( current == 0 || strcmp(FileName, current) != 0 ) )
+   {
+      if ( messageBox(__("The file already exists. Overwrite it?"),
+                    mfYesNoCancel) != cmYes ) return 0;
+   }
+   ofpstream * rst = new ofpstream( FileName, ios::in|ios::binary );
+   if (rst) rst->writeBytes(Signature, strlen(Signature) + 1);
+   return rst;
+}
+