X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/41a324a748544b0fb9b0acfc65b1a39b7611550c..2685767a6125c1620719c7de6234aedf41857b7e:/field.c

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+/* -*-c-*-
+ *
+ * $Id: field.c,v 1.1 2001/05/07 17:30:13 mdw Exp $
+ *
+ * [Abstract field operations *
+ * (c) 2001 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------* 
+ *
+ * This file is part of Catacomb.
+ *
+ * Catacomb is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ * 
+ * Catacomb is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Library General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Library General Public
+ * License along with Catacomb; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * 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"
+#include "mp.h"
+
+/*----- Main code ---------------------------------------------------------*/
+
+/* --- @field_id@ --- *
+ *
+ * Arguments:	@field *f@ = pointer to a field
+ *		@mp *d@ = a destination element
+ *		@mp *x@ = a source element
+ *
+ * Returns:	The result element.
+ *
+ * Use:		An identity operation which can be used if your field has no
+ *		internal representation.
+ */
+
+mp *field_id(field *f, mp *d, mp *x)
+{
+  x = MP_COPY(x);
+  if (d) MP_DROP(d);
+  return (x);
+}
+
+/*----- That's all, folks -------------------------------------------------*/