3 * $Id: prim.c,v 1.2 2000/07/29 09:57:42 mdw Exp $
5 * Finding primitive elements
7 * (c) 1999 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
14 * Catacomb is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as
16 * published by the Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version.
19 * Catacomb is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
24 * You should have received a copy of the GNU Library General Public
25 * License along with Catacomb; if not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 /*----- Revision history --------------------------------------------------*
33 * Revision 1.2 2000/07/29 09:57:42 mdw
34 * Improve primitive-element testing a lot. Now much more sensible and
35 * orthogonal: you can find a generator for any given subgroup order by
36 * putting in the appropriate parameters.
38 * Revision 1.1 1999/12/22 15:58:59 mdw
39 * Search for primitive elements using prime-search equipment.
43 /*----- Header files ------------------------------------------------------*/
52 /*----- Main code ---------------------------------------------------------*/
54 /* --- @prim_test@ --- */
56 int prim_test(int rq
, pgen_event
*ev
, void *p
)
71 x
= mpmont_exp(&c
->mm
, MP_NEW
, ev
->m
, c
->exp
);
72 if (MP_CMP(x
, ==, MP_ONE
))
82 y
= mpmont_exp(&c
->mm
, y
, x
, *f
);
83 if (MP_CMP(y
, ==, MP_ONE
)) {
104 /* --- Trivial stepping functions -----------------------------------------*/
106 /* --- @prim_step@ --- */
108 int prim_step(int rq
, pgen_event
*ev
, void *p
)
116 ev
->m
= mp_fromint(ev
->m
, primetab
[(*i
)++]);
122 /*----- That's all, folks -------------------------------------------------*/