/* -*-c-*-
*
- * $Id: field.c,v 1.1.4.1 2003/06/10 13:43:53 mdw Exp $
+ * $Id: field.c,v 1.3 2004/04/01 12:50:09 mdw Exp $
*
* Abstract field operations
*
/*----- Revision history --------------------------------------------------*
*
* $Log: field.c,v $
+ * Revision 1.3 2004/04/01 12:50:09 mdw
+ * Add cyclic group abstraction, with test code. Separate off exponentation
+ * functions for better static linking. Fix a buttload of bugs on the way.
+ * Generally ensure that negative exponents do inversion correctly. Add
+ * table of standard prime-field subgroups. (Binary field subgroups are
+ * currently unimplemented but easy to add if anyone ever finds a good one.)
+ *
+ * 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.
*
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 -------------------------------------------------*/