From: Matthijs Kooijman <m.kooijman@student.utwente.nl>
Date: Tue, 17 Feb 2009 16:10:57 +0000 (+0100)
Subject: Add predicates for SigUse.
X-Git-Url: https://git.stderr.nl/gitweb?p=matthijs%2Fmaster-project%2Fc%CE%BBash.git;a=commitdiff_plain;h=c9878e08917311385ce7edbb93f548788cf9df14

Add predicates for SigUse.
---

diff --git a/FlattenTypes.hs b/FlattenTypes.hs
index ce1f22d..9f080f7 100644
--- a/FlattenTypes.hs
+++ b/FlattenTypes.hs
@@ -96,6 +96,23 @@ data SigUse =
   | SigStateNew Int  -- | Use as the new internal state
   | SigSubState      -- | Do not use, state variable is used in a subcircuit
 
+-- | Is this a port signal use?
+isPortSigUse :: SigUse -> Bool
+isPortSigUse SigPortIn = True
+isPortSigUse SigPortOut = True
+isPortSigUse _ = False
+
+-- | Is this a state signal use? Returns false for substate.
+isStateSigUse :: SigUse -> Bool
+isStateSigUse (SigStateOld _) = True
+isStateSigUse (SigStateNew _) = True
+isStateSigUse _ = False
+
+-- | Is this an internal signal use?
+isInternalSigUse :: SigUse -> Bool
+isInternalSigUse SigInternal = True
+isInternalSigUse _ = False
+
 -- | Information on a signal definition
 data SignalInfo = SignalInfo {
   sigName :: Maybe String,