Auto-Commenting macro

Tired of documenting C++ functions? Me too. Just scroll, select, copy, scroll, paste, delete parts, type text...

This little VB Script macro does half of the work for you. I don't have much to explain so -- here's the sample:

Initial state of C++ code:


BOOL CMainFrame::OnCmdMsg(UINT nID, int nCode, void* pExtra, 
						  AFX_CMDHANDLERINFO* pHandlerInfo)
{
	// let the view have first crack at the command
	if (m_wndView.OnCmdMsg(nID, nCode, pExtra, pHandlerInfo))
		return TRUE;

	// otherwise, do default handling
	return CFrameWnd::OnCmdMsg(nID, nCode, pExtra, pHandlerInfo);
}
And this is C++ code after starting CommentFunction() macro:

// ==================================================================
// 
// FUNCTION :  CMainFrame::OnCmdMsg()
// 
// * Description :
// 
// 
// * Author : [Nenad Nikolic], Created : [10/31/98 7:11:41 PM]
// 
// * Returns : [BOOL] -
// 
// * Function parameters : 
// [nID] -
// [nCode] -
// [pExtra] -
// [pHandlerInfo] -
// 
// ==================================================================
BOOL CMainFrame::OnCmdMsg(UINT nID, int nCode, void* pExtra, 
						  AFX_CMDHANDLERINFO* pHandlerInfo)
{
	TRACE0( " CMainFrame::OnCmdMsg() entered\n" );

	// let the view have first crack at the command
	if (m_wndView.OnCmdMsg(nID, nCode, pExtra, pHandlerInfo))
		return TRUE;

	// otherwise, do default handling
	return CFrameWnd::OnCmdMsg(nID, nCode, pExtra, pHandlerInfo);
}
Inserted comment above the function is the result of CommentFunction() macro action. You need to select line(s) with function decleration and start the macro. In this case, select these two lines:

BOOL CMainFrame::OnCmdMsg(UINT nID, int nCode, void* pExtra, 
						  AFX_CMDHANDLERINFO* pHandlerInfo)
As you can see, macro extracts pieces of function decleration and generates function comment with stuff that usually need to be commented. As a "bonus" you get "TRACE0" in first line of function body, for debugging purposes.

You can change authors name in code -- simply replace rvalue of "author =" statement.

For information how to edit and start a macro, look at Visual Studio documentation.

Can be improved -- suggestions are welcome.


' CODE (copy in your macro file)
'------------------------------------------------------------------------------
Sub PrintText( s, newline )
 ActiveDocument.Selection = s
 if newline then
  ActiveDocument.Selection.NewLine
 end if
end sub

Function ParseParam( s )
 Trim( s )
 retpos = InStrRev( s, " " )
 ParseParam = Right( s, len( s ) - retpos )
end function

' this is main function
Sub CommentFunction()

 Dim win
 set win = ActiveWindow

 if win.type <> "Text" Then
  MsgBox "This macro can only be run when a text editor window is active."
 else
  fun = ActiveDocument.Selection.Text
  if len(fun) = 0 then
   exit sub
 end if

 retpos = InStr( 1, fun, " ", vbTextCompare )
 retval = Left( fun, retpos - 1)

 lppos = InStr( 1, fun, "(", vbTextCompare )
 funcname = Mid( fun , retpos, lppos - retpos )

 ActiveDocument.Selection.StartOfLine
 ActiveDocument.Selection.LineUp
 ActiveDocument.Selection.NewLine
 PrintText "// ==================================================================", TRUE
 PrintText "// ", TRUE
    
 PrintText "// FUNCTION : " & funcname & "()", TRUE
 PrintText "// ", TRUE
 PrintText "// * Description :", TRUE
 PrintText "// ", TRUE
 PrintText "// ", TRUE
		
 author = "Nenad Nikolic"
 PrintText "// * Author : [" & author & "], Created : [" & CDate(Now) & "]", TRUE
 PrintText "// ", TRUE
 PrintText "// * Returns : " + "[" + retval + "] -", TRUE
 PrintText "// ", TRUE
 PrintText "// * Function parameters : ", TRUE
 fun = Right( fun, Len(fun) - lppos )
 pos = 1

 have_more = true		
 do while pos > 0 and have_more
  pos = InStr( 1, fun, ",", vbTextCompare )
  if pos = 0 then
   have_more = false
   pos = InStr( 1, fun, ")", vbTextCompare )
  end if

  if pos > 1 then
   retval = Left( fun, pos - 1 )
   retval = ParseParam( retval )
   PrintText "// [" + retval + "] -", TRUE
  end if

  if have_more = true then
   fun = Right( fun, Len(fun) - pos )
  end if
 loop

 PrintText "// ", TRUE
 PrintText "// ==================================================================", FALSE

 ' remove this part if you don't want TRACE0
 ActiveDocument.Selection.FindText "{"
 ActiveDocument.Selection.CharRight
 ActiveDocument.Selection.NewLine
 PrintText "TRACE0( """ & funcname & "() entered\n"" );", TRUE

 End If
end Sub

Date Last Updated: February 3, 1999



Comments

  • There are no comments yet. Be the first to comment!

Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • When individual departments procure cloud service for their own use, they usually don't consider the hazardous organization-wide implications. Read this paper to learn best practices for setting up an internal, IT-based cloud brokerage function that service the entire organization. Find out how this approach enables you to retain top-down visibility and control of network security and manage the impact of cloud traffic on your WAN.

  • Following an IT incident through to resolution is more than just acknowledging an alert and restarting a server. The recent State of On-Call Report found that it takes most companies an average of 10-30 minutes to resolve an incident with an average of 5 people involved. Imagine how much money and time companies are spending to deal with incident resolution. But what if you had a tool that offered solutions baked in? Or a tool that sent alerts to the right person or team every time? These are the kind of …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date