X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/2685767a6125c1620719c7de6234aedf41857b7e..b817bfc642225b8c3c0b6a7e42d1fb949b61a606:/field.c

diff --git a/field.c b/field.c
index c7e7559..c8e31d2 100644
--- a/field.c
+++ b/field.c
@@ -1,8 +1,9 @@
 /* -*-c-*-
  *
- * $Id: field.c,v 1.1 2001/05/07 17:30:13 mdw Exp $
+ * $Id: field.c,v 1.4 2004/04/08 01:36:15 mdw Exp $
+ *
+ * Abstract field operations
  *
- * [Abstract field operations *
  * (c) 2001 Straylight/Edgeware
  */
 
@@ -26,14 +27,6 @@
  * MA 02111-1307, USA.
  */
 
-/*----- Revision history --------------------------------------------------* 
- *
- * $Log: field.c,v $
- * Revision 1.1  2001/05/07 17:30:13  mdw
- * Add an internal-representation no-op function.
- *
- */
-
 /*----- Header files ------------------------------------------------------*/
 
 #include "field.h"
@@ -60,4 +53,35 @@ mp *field_id(field *f, mp *d, mp *x)
   return (x);
 }
 
+/* --- @field_samep@ --- *
+ *
+ * Arguments:	@field *f, *g@ = two fields
+ *
+ * Returns:	Nonzero if the fields are identical (not just isomorphic).
+ *
+ * Use:		Checks for sameness of fields.  This function does the full
+ *		check, not just the field-type-specific check done by the
+ *		@sampep@ field operation.
+ */
+
+int field_samep(field *f, field *g)
+{
+  return (f->ops == g->ops && F_SAMEP(f, g));
+}
+
+/* --- @field_stdsamep@ --- *
+ *
+ * Arguments:	@field *f, *g@ = two fields
+ *
+ * Returns:	Nonzero if the fields are identical (not just isomorphic).
+ *
+ * Use:		Standard sameness check, based on equality of the @m@
+ *		member.
+ */
+
+int field_stdsamep(field *f, field *g)
+{
+  return (MP_EQ(f->m, g->m));
+}
+
 /*----- That's all, folks -------------------------------------------------*/