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/*
* CENA C++ Utilities
*
* by Stephane Chatty
*
* Copyright 1993-1995
* Centre d'Etudes de la Navigation Aerienne (CENA)
*
* Automata.
*
* $Id$
* $CurLog$
*/
#include "Automaton.h"
CcuBaseLink :: CcuBaseLink (CcuBaseState* s)
: To (s)
{
}
CcuBaseLink :: ~CcuBaseLink ()
{
}
CcuBaseState :: CcuBaseState (const char* name, CcuBaseAutomaton& a)
: Name (name),
Links (a.Size, a.Hash, a.Copy, a.Delete, a.Compare),
TheAutomaton (&a)
{
}
CcuBaseState :: ~CcuBaseState ()
{
CcuHashIterOf <CcuBaseLink> l = Links;
while (++l)
delete *l;
}
#if 0
void
CcuBaseState :: CreateLink (CcuBaseState* to, CcuKey* k)
{
CcuHashCellOf <CcuBaseLink>* c = Links.Add (k);
c->SetInfo (new CcuBaseLink (to));
}
#endif
#if 0
void
CcuBaseState :: Add (CcuKey* key, CcuBaseLink* l)
{
CcuHashCellOf <CcuLink>* c = Links.Add (key);
c->SetInfo (l);
}
#endif
CcuBaseState*
CcuBaseState :: Next (CcuToken* tk, bool peek)
{
CcuKey* k = TheAutomaton->GetKey ? (TheAutomaton->GetKey) (tk) : tk;
CcuHashCellOf <CcuBaseLink>* c = Links.Get (k);
if (!c)
return 0;
CcuBaseLink* l = c->GetInfo ();
CcuBaseState* to = l->GetDestination ();
if (!peek) {
Out ();
l->Fire (this, to, tk);
to->In ();
}
return to;
}
CcuBaseAutomaton :: CcuBaseAutomaton (AKEY_F gk, HASH_F hash, HCP_F cp, HDEL_F del, HCMP_F cmp, int sz)
: Size (sz),
Hash (hash),
Copy (cp),
Delete (del),
Compare (cmp),
GetKey (gk),
Initial (0),
AllStates ()
{
}
CcuBaseAutomaton :: ~CcuBaseAutomaton ()
{
CcuListIterOf <CcuBaseState> s = AllStates;
while (++s)
delete *s;
}
#if 0
CcuBaseState*
CcuBaseAutomaton :: CreateState (const char* n);
{
CcuBaseState* s = new CcuBaseState (n, *this);
AllStates.Append (s);
return s;
}
#endif
CcuLink :: CcuLink (CcuState* s, CcuLinkFun fn)
: CcuBaseLink (s),
Fun (fn)
{
}
CcuLink :: ~CcuLink ()
{
}
void
CcuLink :: Fire (CcuBaseState* from, CcuBaseState* to, CcuToken* data)
{
if (Fun)
(*Fun) ((CcuState*) from, (CcuState*) to, data);
}
CcuState :: CcuState (const char* name, CcuAutomaton& a, CcuStateFun* in, CcuStateFun* out)
: CcuBaseState (name, a),
InFun (in),
OutFun (out)
{
}
CcuState :: ~CcuState ()
{
}
void
CcuState :: In ()
{
if (InFun) (*InFun) (this);
}
void
CcuState :: Out ()
{
if (OutFun) (*OutFun) (this);
}
void
CcuState :: CreateLink (CcuState* to, CcuKey* k, CcuLinkFun fn)
{
CcuHashCellOf <CcuBaseLink>* c = Links.Add (k);
c->SetInfo (new CcuLink (to, fn));
}
CcuState*
CcuAutomaton :: CreateState (const char* n, CcuStateFun in, CcuStateFun out)
{
CcuState* s = new CcuState (n, *this, in, out);
AllStates.Append (s);
return s;
}
CcuAutomIter :: CcuAutomIter (CcuBaseAutomaton& a)
: TheAutomaton (&a),
CurState (a.GetInitial ())
{
}
CcuAutomIter :: ~CcuAutomIter ()
{
}
bool
CcuAutomIter :: Step (CcuToken* tk)
{
if (!CurState && !(CurState = TheAutomaton->GetInitial ()))
return false;
CcuBaseState* n = CurState->Next (tk);
if (!n)
return false;
CurState = n;
return true;
}
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