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V0.8: Ignore system tasks/functions NULL arguments in @* calculation. 

System tasks and functions can be defined to have NULL arguments.
This patch makes the @* sensitivity list calculation skip these
NULL (constant) arguments.
This commit is contained in:
Cary R 2010-11-16 14:52:57 -08:00 committed by Stephen Williams
parent 867c864132
commit 35c68d8c58
1 changed files with 23 additions and 9 deletions
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20
net_nex_input.cc
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2002 Stephen Williams (steve@icarus.com)
* Copyright (c) 2002-2010 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
@ -130,17 +130,24 @@ NexusSet* NetESelect::nex_input(bool rem_out)
return result;
}
/*
* The $fread, etc. system functions can have NULL arguments.
*/
NexusSet* NetESFunc::nex_input(bool rem_out)
{
if (nparms_ == 0)
return new NexusSet;
NexusSet*result = parms_[0]->nex_input(rem_out);
NexusSet*result;
if (parms_[0]) result = parms_[0]->nex_input(rem_out);
else result = new NexusSet;
for (unsigned idx = 1 ; idx < nparms_ ; idx += 1) {
if (parms_[idx]) {
NexusSet*tmp = parms_[idx]->nex_input(rem_out);
result->add(*tmp);
delete tmp;
}
}
return result;
}
@ -372,17 +379,24 @@ NexusSet* NetRepeat::nex_input(bool rem_out)
return result;
}
/*
* The $display, etc. system tasks can have NULL arguments.
*/
NexusSet* NetSTask::nex_input(bool rem_out)
{
if (parms_.count() == 0)
return new NexusSet;
NexusSet*result = parms_[0]->nex_input(rem_out);
NexusSet*result;
if (parms_[0]) result = parms_[0]->nex_input(rem_out);
else result = new NexusSet;
for (unsigned idx = 1 ; idx < parms_.count() ; idx += 1) {
if (parms_[idx]) {
NexusSet*tmp = parms_[idx]->nex_input(rem_out);
result->add(*tmp);
delete tmp;
}
}
return result;
}