/* -*-c-*-
*
- * $Id: prim.c,v 1.1 1999/12/22 15:58:59 mdw Exp $
+ * $Id: prim.c,v 1.4 2004/04/08 01:36:15 mdw Exp $
*
* Finding primitive elements
*
* (c) 1999 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: prim.c,v $
- * Revision 1.1 1999/12/22 15:58:59 mdw
- * Search for primitive elements using prime-search equipment.
- *
- */
-
/*----- Header files ------------------------------------------------------*/
#include "mp.h"
case PGEN_BEGIN:
return (PGEN_TRY);
case PGEN_TRY: {
- mp *x = MP_NEW;
- mp *f = c->f;
+ mp *x;
rc = PGEN_FAIL;
- x = mpmont_exp(&c->mm, x, ev->m, f);
- if (MP_CMP(x, ==, MP_ONE))
- goto done;
- if (c->n == 0) {
- mp_drop(ev->m);
- ev->m = MP_COPY(x);
- } else {
- size_t n = c->n - 1;
- f++;
+ if (!c->exp)
+ x = mp_copy(ev->m);
+ else {
+ x = mpmont_exp(&c->mm, MP_NEW, ev->m, c->exp);
+ if (MP_EQ(x, MP_ONE))
+ goto done;
+ }
+ if (c->n == 0)
+ goto ok;
+ else {
+ size_t n = c->n;
+ mp **f = c->f;
+ mp *y = MP_NEW;
while (n) {
- x = mpmont_exp(&c->mm, x, ev->m, f);
- if (MP_CMP(x, ==, MP_ONE))
+ y = mpmont_exp(&c->mm, y, x, *f);
+ if (MP_EQ(y, MP_ONE)) {
+ mp_drop(y);
goto done;
+ }
n--; f++;
}
+ mp_drop(y);
}
+ ok:
rc = PGEN_DONE;
+ mp_drop(ev->m);
+ ev->m = x;
+ break;
done:
mp_drop(x);
} break;