A variety of small tweaks and fixes. Make mpmont etc. return errors

[u/mdw/catacomb] / gf-exp.h

diff --git a/gf-exp.h b/gf-exp.h
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--- /dev/null
+++ b/gf-exp.h
@@ -0,0 +1,69 @@
+/* -*-c-*-
+ *
+ * $Id$
+ *
+ * Exponentiation for binary polynomials
+ *
+ * (c) 2004 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.
+ */
+
+#ifndef CATACOMB_GF_EXP_H
+#define CATACOMB_GF_EXP_H
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+
+/*----- Exponentiation ----------------------------------------------------*/
+
+#define EXP_TYPE mp *
+
+#define EXP_COPY(d, x) d = MP_COPY(x)
+#define EXP_DROP(x) MP_DROP(x)
+
+#define EXP_MUL(a, x) do {                                             \
+  mp *t = gf_mul(spare, a, x);                                         \
+  spare = a;                                                           \
+  a = t;                                                               \
+} while (0)
+
+#define EXP_SQR(a) do {                                                        \
+  mp *t = gf_sqr(spare, a);                                            \
+  spare = a;                                                           \
+  a = t;                                                               \
+} while (0)
+
+#define EXP_FIX(x)
+
+#define EXP_SETMUL(d, x, y) d = gf_mul(MP_NEW, x, y)
+#define EXP_SETSQR(d, x) d = gf_sqr(MP_NEW, x)
+
+#include "exp.h"
+
+/*----- That's all, folks -------------------------------------------------*/
+
+#ifdef __cplusplus
+  }
+#endif
+
+#endif