RE: [sv-ec] String maniulation functions

Probably because they are not defined as built-in system functions, but
rather as string variable methods, so str.itoa(i) converts i's decimal
representation and stores it into a str. Otherwise, what do you need str
for? What you would like is a $itoa, similar to $itor.
 
Shalom


________________________________

	From: owner-sv-ec@server.eda.org
[mailto:owner-sv-ec@server.eda.org] On Behalf Of Rich, Dave
	Sent: Friday, May 30, 2008 8:24 AM
	To: sv-ec@server.eda.org
	Subject: [sv-ec] String maniulation functions
	
	

	Does anyone know why all the ato* (atoi, atohex, atooct, atobin,
atoreal) methods are functions that return a value, and all the *toa
(itoa, hextoa, octtoa, bintoa, realtoa) methods are void functions
instead of returning a string? The LRM says the ato* methods are the
inverse of the *toa methods. That's not true if the *toa functions are
void functions.

	 

	The reason I ask is that there seems to be a hole in SV in that
you can covert a string parameter to an integer parameter, but you can't
convert an integer parameter to a string parameter. Even if you try to
create a wrapper function

	 

	function string itoa(int arg);

	  itoa.itoa(arg);

	endfunction

	 

	This is not legal as a constant function because void functions
are not legal inside constant functions.

	 

	Also, mantis 2184 missed $sformatf as a valid constant system
function if all arguments are constant expressions.

	 

	 

	 

	David Rich
	Verification Technologist
	Design Verification & Test Division
	Mentor Graphics Corporation
	dave_rich@mentor.com
	Office:   408 487-7206
	Cell:     510 589-2625

	 


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