File: [local] / OpenXM_contrib2 / asir2000 / engine / gf2n.c (download)
Revision 1.4, Tue Oct 9 01:36:11 2001 UTC (22 years, 11 months ago) by noro
Branch: MAIN
CVS Tags: R_1_3_1-2, RELEASE_1_3_1_13b, RELEASE_1_2_3_12, RELEASE_1_2_3, RELEASE_1_2_2_KNOPPIX_b, RELEASE_1_2_2_KNOPPIX, RELEASE_1_2_2, RELEASE_1_2_1, KNOPPIX_2006, DEB_REL_1_2_3-9 Changes since 1.3: +17 -45
lines
Conversion to ANSI style (not completed yet).
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/*
* Copyright (c) 1994-2000 FUJITSU LABORATORIES LIMITED
* All rights reserved.
*
* FUJITSU LABORATORIES LIMITED ("FLL") hereby grants you a limited,
* non-exclusive and royalty-free license to use, copy, modify and
* redistribute, solely for non-commercial and non-profit purposes, the
* computer program, "Risa/Asir" ("SOFTWARE"), subject to the terms and
* conditions of this Agreement. For the avoidance of doubt, you acquire
* only a limited right to use the SOFTWARE hereunder, and FLL or any
* third party developer retains all rights, including but not limited to
* copyrights, in and to the SOFTWARE.
*
* (1) FLL does not grant you a license in any way for commercial
* purposes. You may use the SOFTWARE only for non-commercial and
* non-profit purposes only, such as academic, research and internal
* business use.
* (2) The SOFTWARE is protected by the Copyright Law of Japan and
* international copyright treaties. If you make copies of the SOFTWARE,
* with or without modification, as permitted hereunder, you shall affix
* to all such copies of the SOFTWARE the above copyright notice.
* (3) An explicit reference to this SOFTWARE and its copyright owner
* shall be made on your publication or presentation in any form of the
* results obtained by use of the SOFTWARE.
* (4) In the event that you modify the SOFTWARE, you shall notify FLL by
* e-mail at risa-admin@sec.flab.fujitsu.co.jp of the detailed specification
* for such modification or the source code of the modified part of the
* SOFTWARE.
*
* THE SOFTWARE IS PROVIDED AS IS WITHOUT ANY WARRANTY OF ANY KIND. FLL
* MAKES ABSOLUTELY NO WARRANTIES, EXPRESSED, IMPLIED OR STATUTORY, AND
* EXPRESSLY DISCLAIMS ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF THIRD PARTIES'
* RIGHTS. NO FLL DEALER, AGENT, EMPLOYEES IS AUTHORIZED TO MAKE ANY
* MODIFICATIONS, EXTENSIONS, OR ADDITIONS TO THIS WARRANTY.
* UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY, TORT, CONTRACT,
* OR OTHERWISE, SHALL FLL BE LIABLE TO YOU OR ANY OTHER PERSON FOR ANY
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, PUNITIVE OR CONSEQUENTIAL
* DAMAGES OF ANY CHARACTER, INCLUDING, WITHOUT LIMITATION, DAMAGES
* ARISING OUT OF OR RELATING TO THE SOFTWARE OR THIS AGREEMENT, DAMAGES
* FOR LOSS OF GOODWILL, WORK STOPPAGE, OR LOSS OF DATA, OR FOR ANY
* DAMAGES, EVEN IF FLL SHALL HAVE BEEN INFORMED OF THE POSSIBILITY OF
* SUCH DAMAGES, OR FOR ANY CLAIM BY ANY OTHER PARTY. EVEN IF A PART
* OF THE SOFTWARE HAS BEEN DEVELOPED BY A THIRD PARTY, THE THIRD PARTY
* DEVELOPER SHALL HAVE NO LIABILITY IN CONNECTION WITH THE USE,
* PERFORMANCE OR NON-PERFORMANCE OF THE SOFTWARE.
*
* $OpenXM: OpenXM_contrib2/asir2000/engine/gf2n.c,v 1.4 2001/10/09 01:36:11 noro Exp $
*/
#include "ca.h"
#include "base.h"
extern int lm_lazy;
GEN_UP2 current_mod_gf2n;
void setmod_gf2n(P p)
{
if ( !current_mod_gf2n ) {
current_mod_gf2n = (GEN_UP2)MALLOC(sizeof(struct oGEN_UP2));
current_mod_gf2n->id = UP2_SPARSE; /* use sparse rep. by default */
}
ptoup2(p,¤t_mod_gf2n->dense);
ptoup2_sparse(p,¤t_mod_gf2n->sparse);
}
void getmod_gf2n(UP2 *p)
{
if ( current_mod_gf2n )
*p = current_mod_gf2n->dense;
else
*p = 0;
}
void simpgf2n(GF2N n,GF2N *r)
{
UP2 rem;
if ( !n )
*r = 0;
else if ( NID(n) != N_GF2N )
*r = n;
else {
gen_simpup2(n->body,current_mod_gf2n,&rem);
MKGF2N(rem,*r);
}
}
void ptogf2n(Obj q,GF2N *l)
{
UP2 q1;
if ( !q || (OID(q)==O_N && NID(q)==N_GF2N) ) {
*l = (GF2N)q;
} else if ( (OID(q)==O_N && NID(q)==N_Q) || OID(q)==O_P ) {
ptoup2((P)q,&q1);
MKGF2N(q1,*l);
} else
error("ptogf2n : invalid argument");
}
void gf2ntop(GF2N q,P *l)
{
if ( !q )
*l = 0;
else
up2top(q->body,l);
}
void gf2ntovect(GF2N q,VECT *l)
{
if ( !q )
*l = 0;
else
up2tovect(q->body,l);
}
#define NZGF2N(a) ((a)&&(OID(a)==O_N)&&(NID(a)==N_GF2N))
void addgf2n(GF2N a,GF2N b,GF2N *c)
{
UP2 t,t1;
GF2N z;
ptogf2n((Obj)a,&z); a = z; ptogf2n((Obj)b,&z); b = z;
if ( !a )
*c = b;
else if ( !b )
*c = a;
else {
addup2(a->body,b->body,&t);
gen_simpup2(t,current_mod_gf2n,&t1);
MKGF2N(t1,*c);
}
}
void subgf2n(GF2N a,GF2N b,GF2N *c)
{
addgf2n(a,b,c);
}
void mulgf2n(GF2N a,GF2N b,GF2N *c)
{
UP2 t;
GF2N z;
ptogf2n((Obj)a,&z); a = z; ptogf2n((Obj)b,&z); b = z;
if ( !a || !b )
*c = 0;
else {
mulup2(a->body,b->body,&t);
#if 0
gen_simpup2(t,current_mod_gf2n,&t1);
MKGF2N(t1,*c);
#else
gen_simpup2_destructive(t,current_mod_gf2n);
if ( !t || !t->w )
*c = 0;
else
MKGF2N(t,*c);
#endif
}
}
void squaregf2n(GF2N a,GF2N *c)
{
UP2 t;
GF2N z;
ptogf2n((Obj)a,&z); a = z;
if ( !a )
*c = 0;
else {
squareup2(a->body,&t);
#if 0
gen_simpup2(t,current_mod_gf2n,&t1);
MKGF2N(t1,*c);
#else
gen_simpup2_destructive(t,current_mod_gf2n);
if ( !t || !t->w )
*c = 0;
else
MKGF2N(t,*c);
#endif
}
}
void divgf2n(GF2N a,GF2N b,GF2N *c)
{
UP2 t,i,s;
GF2N z;
ptogf2n((Obj)a,&z); a = z; ptogf2n((Obj)b,&z); b = z;
if ( !b )
error("divgf2n: division by 0");
else if ( !a )
*c = 0;
else {
gen_invup2(b->body,current_mod_gf2n,&i);
mulup2(a->body,i,&t);
gen_simpup2(t,current_mod_gf2n,&s);
MKGF2N(s,*c);
}
}
void invgf2n(GF2N b,GF2N *c)
{
UP2 i;
GF2N z;
ptogf2n((Obj)b,&z); b = z;
if ( !b )
error("divgf2n: division by 0");
else {
gen_invup2(b->body,current_mod_gf2n,&i);
MKGF2N(i,*c);
}
}
void chsgngf2n(GF2N a,GF2N *c)
{
*c = a;
}
void pwrgf2n(GF2N a,Q b,GF2N *c)
{
UP2 t;
GF2N r;
if ( !b ) {
MKGF2N(ONEUP2,*c);
} else if ( !a )
*c = 0;
else {
gen_pwrmodup2(a->body,b,current_mod_gf2n,&t);
MKGF2N(t,r);
if ( SGN(b) < 0 )
invgf2n(r,c);
else
*c = r;
}
}
int cmpgf2n(GF2N a,GF2N b)
{
GF2N z;
ptogf2n((Obj)a,&z); a = z; ptogf2n((Obj)b,&z); b = z;
if ( !a )
if ( !b )
return 0;
else
return -1;
else if ( !b )
return 1;
else
return compup2(a->body,b->body);
}
void randomgf2n(GF2N *r)
{
int i,w,d;
unsigned int *tb;
UP2 t;
if ( !current_mod_gf2n )
error("randomgf2n : current_mod_gf2n is not set");
w = current_mod_gf2n->dense->w;
d = degup2(current_mod_gf2n->dense);
NEWUP2(t,w);
for ( i = 0, tb = t->b; i < w; i++ )
tb[i] = mt_genrand();
tb[w-1] &= (1<<(d%BSH))-1;
for ( i = w-1; i >= 0 && !tb[i]; i-- );
if ( i < 0 )
*r = 0;
else {
t->w = i+1; MKGF2N(t,*r);
}
}