Complex multiple interacting trampolines removal.

src/TODO-trampolines.txt

@@ -1,10 +1,8 @@
-2  iterateTermOther 		arachne.c +1053 ; system.c +1155
 1  subtermUnify 		arachne.c +961
 3  unify 			mgu.c +233 ; mgu.c +247 ; mgu.c +281
 
 dependencies:
 
-iterateTermOther is called using makeDepend and addOther
 subtermUnify is called using unifiesWithKeys
 unify is called using unify_combine_enc and unify_combined_tup, and a callback using the keys list? (which propagates back to subtermunify data)
 

src/arachne.c

@@ -935,6 +935,66 @@ createDecryptionChain (const Binding b, const int run, const int index,
     }
 }
 
+struct md_state
+{
+  int neworders;
+  int allgood;
+  Term tvar;
+  Termlist sl;
+};
+
+//! makeDepend for next function
+	    /** the idea is, that a substitution in run x with
+	    * something containing should be wrapped; this
+   * occurs for all subterms of other runs.
+   */
+int
+makeDepend (Term tsmall, struct md_state *state)
+{
+  Term tsubst;
+
+  tsubst = deVar (tsmall);
+  if (!realTermVariable (tsubst))
+    {
+      // Only for non-variables (i.e. local constants)
+      int r1, e1;
+
+      r1 = TermRunid (tsubst);
+      e1 = firstOccurrence (sys, r1, tsubst, SEND);
+      if (e1 >= 0)
+	{
+	  int r2, e2;
+
+	  r2 = TermRunid (state->tvar);
+	  e2 = firstOccurrence (sys, r2, tsubst, RECV);
+	  if (e2 >= 0)
+	    {
+
+	      if (dependPushEvent (r1, e1, r2, e2))
+		{
+		  state->neworders++;
+		  return true;
+		}
+	      else
+		{
+		  state->allgood = false;
+		  if (switches.output == PROOF)
+		    {
+		      indentPrint ();
+		      eprintf ("Substitution for ");
+		      termSubstPrint (state->sl->term);
+		      eprintf (" (subterm ");
+		      termPrint (tsmall);
+		      eprintf (") could not be safely bound.\n");
+		    }
+		  return false;
+		}
+	    }
+	}
+    }
+  return true;
+}
+
 
 //! Try to bind a specific existing run to a goal.
 /**
@@ -994,70 +1054,23 @@ bind_existing_to_goal (const Binding b, const int run, const int index,
 	  }
 	else
 	  {
-	    int neworders;
-	    int allgood;
-	    Term tvar;
+	    struct md_state State;
 
-	    // the idea is, that a substitution in run x with
-	    // something containing should be wrapped; this
-	    // occurs for all subterms of other runs.
-	    int makeDepend (Term tsmall)
-	    {
-	      Term tsubst;
 
-	      tsubst = deVar (tsmall);
-	      if (!realTermVariable (tsubst))
-		{
-		  // Only for non-variables (i.e. local constants)
-		  int r1, e1;
+	    // TODO CONTEXT for makeDepend in State
 
-		  r1 = TermRunid (tsubst);
-		  e1 = firstOccurrence (sys, r1, tsubst, SEND);
-		  if (e1 >= 0)
-		    {
-		      int r2, e2;
-
-		      r2 = TermRunid (tvar);
-		      e2 = firstOccurrence (sys, r2, tsubst, RECV);
-		      if (e2 >= 0)
-			{
-
-			  if (dependPushEvent (r1, e1, r2, e2))
-			    {
-			      neworders++;
-			      return true;
-			    }
-			  else
-			    {
-			      allgood = false;
-			      if (switches.output == PROOF)
-				{
-				  indentPrint ();
-				  eprintf ("Substitution for ");
-				  termSubstPrint (sl->term);
-				  eprintf (" (subterm ");
-				  termPrint (tsmall);
-				  eprintf (") could not be safely bound.\n");
-				}
-			      return false;
-			    }
-			}
-		    }
-		}
-	      return true;
-	    }
-
-	    neworders = 0;
-	    allgood = true;
-	    tvar = sl->term;
-	    iterateTermOther (run, tvar, makeDepend);
-	    if (allgood)
+	    State.neworders = 0;
+	    State.sl = sl;
+	    State.tvar = sl->term;
+	    State.allgood = true;
+	    iterateTermOther (run, State.tvar, makeDepend, &State);
+	    if (State.allgood)
 	      {
 		wrapSubst (sl->next);
 	      }
-	    while (neworders > 0)
+	    while (State.neworders > 0)
 	      {
-		neworders--;
+		State.neworders--;
 		dependPopEvent ();
 	      }
 	  }

src/system.c

@@ -1128,6 +1128,19 @@ iterateEventsType (const System sys, const int run, const int evtype,
   return true;
 }
 
+struct ao_state
+{
+  Termlist tlo;
+};
+
+//! Helper for next
+int
+addOther (Term t, struct ao_state *state)
+{
+  state->tlo = termlistAddNew (state->tlo, t);
+  return true;
+}
+
 // Iterate over all 'others': local variables of a run that are instantiated and contain some term of another run.
 /**
  * Now incorporates "checkterm" required argument of myrun to the callback:
@@ -1140,15 +1153,10 @@ iterateLocalToOther (const System sys, const int myrun,
 {
   Termlist tlo, tls;
   int flag;
-
-  int addOther (Term t)
-  {
-    tlo = termlistAddNew (tlo, t);
-    return true;
-  }
+  struct ao_state State;
 
   flag = true;
-  tlo = NULL;
+  State.tlo = NULL;
   // construct all others occuring in the recvs
   for (tls = sys->runs[myrun].sigma; tls != NULL; tls = tls->next)
     {
@@ -1157,11 +1165,11 @@ iterateLocalToOther (const System sys, const int myrun,
       tt = tls->term;
       if (realTermVariable (tt) && tt->subst != NULL);
       {
-	iterateTermOther (myrun, tt->subst, addOther);
+	iterateTermOther (myrun, tt->subst, addOther, &State);
       }
     }
   // now iterate over all of them
-  for (tls = tlo; flag && (tls != NULL); tls = tls->next)
+  for (tls = State.tlo; flag && (tls != NULL); tls = tls->next)
     {
       if (!callback (sys, tls->term, myrun))
 	{
@@ -1170,7 +1178,7 @@ iterateLocalToOther (const System sys, const int myrun,
     }
 
   // clean up
-  termlistDelete (tlo);
+  termlistDelete (State.tlo);
   return flag;
 }
 

src/term.c

@@ -1560,21 +1560,39 @@ termSubstPrint (Term t)
     }
 }
 
+typedef int (*CallBack) ();
+
+struct ito_contain
+{
+  int myrun;
+  CallBack callback;
+  void *ito_state;
+};
+
+int
+testOther (Term t, struct ito_contain *state)
+{
+  int run;
+
+  run = TermRunid (t);
+  if (run >= 0 && run != state->myrun)
+    {
+      return state->callback (t, state->ito_state);
+    }
+  return true;
+}
+
 // Iterate over subterm constants of other runs in a term
 // Callback should return true to progress. This is reported in the final thing.
 int
-iterateTermOther (const int myrun, Term t, int (*callback) (Term t))
+iterateTermOther (const int myrun, Term t, int (*callback) (),
+		  void *ito_state)
 {
-  int testOther (Term t, int *state)
-  {
-    int run;
+  struct ito_contain State;
 
-    run = TermRunid (t);
-    if (run >= 0 && run != myrun)
-      {
-	return callback (t);
-      }
-    return true;
-  }
-  return term_iterate_state_deVar (t, testOther, NULL, NULL, NULL, NULL);
+  State.myrun = myrun;
+  State.callback = callback;
+  State.ito_state = ito_state;
+
+  return term_iterate_state_deVar (t, testOther, NULL, NULL, NULL, &State);
 }

src/term.h

@@ -213,7 +213,7 @@ Term getTermFunction (Term t);
 unsigned int termHidelevel (const Term tsmall, Term tbig);
 void termSubstPrint (Term t);
 
-int iterateTermOther (const int myrun, Term t, int (*callback) (Term t));
+int iterateTermOther (const int myrun, Term t, int (*callback) (), void *s);
 
 extern char *RUNSEP;		// by default, set to "#"