Add an internal-representation no-op function.

[u/mdw/catacomb] / pgen.c

diff --git a/pgen.c b/pgen.c
index eebd966..74a10bc 100644 (file)
--- a/pgen.c
+++ b/pgen.c
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: pgen.c,v 1.6 2000/10/08 12:11:22 mdw Exp $
+ * $Id: pgen.c,v 1.7 2001/02/03 16:05:32 mdw Exp $
  *
  * Prime generation glue
  *
@@ -30,6 +30,10 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: pgen.c,v $
+ * Revision 1.7  2001/02/03 16:05:32  mdw
+ * Now @mp_drop@ checks its argument is non-NULL before attempting to free
+ * it.  Note that the macro version @MP_DROP@ doesn't do this.
+ *
  * Revision 1.6  2000/10/08 12:11:22  mdw
  * Use @MP_EQ@ instead of @MP_CMP@.
  *
@@ -317,8 +321,7 @@ mp *pgen(const char *name, mp *d, mp *m, pgen_proc *event, void *ectx,
     ev.m = 0;
   }
   ev.r->ops->destroy(ev.r);
-  if (d != MP_NEW)
-    mp_drop(d);
+  mp_drop(d);
 
   return (ev.m);
 }
@@ -353,8 +356,7 @@ static int verify(dstr *v)
 
   mp_drop(m);
   mp_drop(q);
-  if (p)
-    mp_drop(p);
+  mp_drop(p);
   assert(mparena_count(MPARENA_GLOBAL) == 0);
   return (ok);
 }