/* -*-c-*-
*
- * $Id: field.c,v 1.2 2004/03/21 22:52:06 mdw Exp $
+ * $Id$
*
* Abstract field operations
*
* (c) 2001 Straylight/Edgeware
*/
-/*----- Licensing notice --------------------------------------------------*
+/*----- Licensing notice --------------------------------------------------*
*
* This file is part of Catacomb.
*
* 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 1.2 2004/03/21 22:52:06 mdw
- * Merge and close elliptic curve branch.
- *
- * Revision 1.1.4.1 2003/06/10 13:43:53 mdw
- * Simple (non-projective) curves over prime fields now seem to work.
- *
- * Revision 1.1 2001/05/07 17:30:13 mdw
- * Add an internal-representation no-op function.
- *
- */
-
/*----- Header files ------------------------------------------------------*/
#include "field.h"
*/
mp *field_id(field *f, mp *d, mp *x)
-{
- x = MP_COPY(x);
- if (d) MP_DROP(d);
- return (x);
-}
+ { x = MP_COPY(x); if (d) MP_DROP(d); 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 == g || (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 -------------------------------------------------*/