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Diff for /OpenXM_contrib2/asir2000/engine/gf2n.c between version 1.1 and 1.5

version 1.1, 1999/12/03 07:39:08 version 1.5, 2018/03/29 01:32:52
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 /* $OpenXM: OpenXM/src/asir99/engine/gf2n.c,v 1.1.1.1 1999/11/10 08:12:26 noro Exp $ */  /*
    * 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 "ca.h"
 #include "base.h"  #include "base.h"
   
Line 6  extern int lm_lazy;
Line 54  extern int lm_lazy;
   
 GEN_UP2 current_mod_gf2n;  GEN_UP2 current_mod_gf2n;
   
 void setmod_gf2n(p)  void setmod_gf2n(P p)
 P p;  
 {  {
         if ( !current_mod_gf2n ) {    if ( !current_mod_gf2n ) {
                 current_mod_gf2n = (GEN_UP2)MALLOC(sizeof(struct oGEN_UP2));      current_mod_gf2n = (GEN_UP2)MALLOC(sizeof(struct oGEN_UP2));
                 current_mod_gf2n->id = UP2_SPARSE; /* use sparse rep. by default */      current_mod_gf2n->id = UP2_SPARSE; /* use sparse rep. by default */
         }    }
         ptoup2(p,&current_mod_gf2n->dense);    ptoup2(p,&current_mod_gf2n->dense);
         ptoup2_sparse(p,&current_mod_gf2n->sparse);    ptoup2_sparse(p,&current_mod_gf2n->sparse);
 }  }
   
 void getmod_gf2n(p)  void getmod_gf2n(UP2 *p)
 UP2 *p;  
 {  {
         if ( current_mod_gf2n )    if ( current_mod_gf2n )
                 *p = current_mod_gf2n->dense;      *p = current_mod_gf2n->dense;
         else    else
                 *p = 0;      *p = 0;
 }  }
   
 void simpgf2n(n,r)  void simpgf2n(GF2N n,GF2N *r)
 GF2N n;  
 GF2N *r;  
 {  {
         UP2 rem;    UP2 rem;
   
         if ( !n )    if ( !n )
                 *r = 0;      *r = 0;
         else if ( NID(n) != N_GF2N )    else if ( NID(n) != N_GF2N )
                 *r = n;      *r = n;
         else {    else {
                 gen_simpup2(n->body,current_mod_gf2n,&rem);      gen_simpup2(n->body,current_mod_gf2n,&rem);
                 MKGF2N(rem,*r);      MKGF2N(rem,*r);
         }    }
 }  }
   
 void ptogf2n(q,l)  void ptogf2n(Obj q,GF2N *l)
 Obj q;  
 GF2N *l;  
 {  {
         UP2 q1;    UP2 q1;
   
         if ( !q || (OID(q)==O_N && NID(q)==N_GF2N) ) {    if ( !q || (OID(q)==O_N && NID(q)==N_GF2N) ) {
                 *l = (GF2N)q;      *l = (GF2N)q;
         } else if ( (OID(q)==O_N && NID(q)==N_Q) || OID(q)==O_P ) {    } else if ( (OID(q)==O_N && NID(q)==N_Q) || OID(q)==O_P ) {
                 ptoup2((P)q,&q1);      ptoup2((P)q,&q1);
                 MKGF2N(q1,*l);      MKGF2N(q1,*l);
         } else    } else
                 error("ptogf2n : invalid argument");      error("ptogf2n : invalid argument");
 }  }
   
 void gf2ntop(q,l)  void gf2ntop(GF2N q,P *l)
 GF2N q;  
 P *l;  
 {  {
         if ( !q )    if ( !q )
                 *l = 0;      *l = 0;
         else    else
                 up2top(q->body,l);      up2top(q->body,l);
 }  }
   
 void gf2ntovect(q,l)  void gf2ntovect(GF2N q,VECT *l)
 GF2N q;  
 VECT *l;  
 {  {
         if ( !q )    if ( !q )
                 *l = 0;      *l = 0;
         else    else
                 up2tovect(q->body,l);      up2tovect(q->body,l);
 }  }
   
 #define NZGF2N(a) ((a)&&(OID(a)==O_N)&&(NID(a)==N_GF2N))  #define NZGF2N(a) ((a)&&(OID(a)==O_N)&&(NID(a)==N_GF2N))
   
 void addgf2n(a,b,c)  void addgf2n(GF2N a,GF2N b,GF2N *c)
 GF2N a,b;  
 GF2N *c;  
 {  {
         UP2 t,t1;    UP2 t,t1;
         GF2N z;    GF2N z;
   
         ptogf2n((Obj)a,&z); a = z; ptogf2n((Obj)b,&z); b = z;    ptogf2n((Obj)a,&z); a = z; ptogf2n((Obj)b,&z); b = z;
         if ( !a )    if ( !a )
                 *c = b;      *c = b;
         else if ( !b )    else if ( !b )
                 *c = a;      *c = a;
         else {    else {
                 addup2(a->body,b->body,&t);      addup2(a->body,b->body,&t);
                 gen_simpup2(t,current_mod_gf2n,&t1);      gen_simpup2(t,current_mod_gf2n,&t1);
                 MKGF2N(t1,*c);      MKGF2N(t1,*c);
         }    }
 }  }
   
 void subgf2n(a,b,c)  void subgf2n(GF2N a,GF2N b,GF2N *c)
 GF2N a,b;  
 GF2N *c;  
 {  {
         addgf2n(a,b,c);    addgf2n(a,b,c);
 }  }
   
 void mulgf2n(a,b,c)  void mulgf2n(GF2N a,GF2N b,GF2N *c)
 GF2N a,b;  
 GF2N *c;  
 {  {
         UP2 t;    UP2 t;
         GF2N z;    GF2N z;
   
         ptogf2n((Obj)a,&z); a = z; ptogf2n((Obj)b,&z); b = z;    ptogf2n((Obj)a,&z); a = z; ptogf2n((Obj)b,&z); b = z;
         if ( !a || !b )    if ( !a || !b )
                 *c = 0;      *c = 0;
         else {    else {
                 mulup2(a->body,b->body,&t);      mulup2(a->body,b->body,&t);
 #if 0  #if 0
                 gen_simpup2(t,current_mod_gf2n,&t1);      gen_simpup2(t,current_mod_gf2n,&t1);
                 MKGF2N(t1,*c);      MKGF2N(t1,*c);
 #else  #else
                 gen_simpup2_destructive(t,current_mod_gf2n);      gen_simpup2_destructive(t,current_mod_gf2n);
                 if ( !t || !t->w )      if ( !t || !t->w )
                         *c = 0;        *c = 0;
                 else      else
                         MKGF2N(t,*c);        MKGF2N(t,*c);
 #endif  #endif
         }    }
 }  }
   
 void squaregf2n(a,c)  void squaregf2n(GF2N a,GF2N *c)
 GF2N a;  
 GF2N *c;  
 {  {
         UP2 t;    UP2 t;
         GF2N z;    GF2N z;
   
         ptogf2n((Obj)a,&z); a = z;    ptogf2n((Obj)a,&z); a = z;
         if ( !a )    if ( !a )
                 *c = 0;      *c = 0;
         else {    else {
                 squareup2(a->body,&t);      squareup2(a->body,&t);
 #if 0  #if 0
                 gen_simpup2(t,current_mod_gf2n,&t1);      gen_simpup2(t,current_mod_gf2n,&t1);
                 MKGF2N(t1,*c);      MKGF2N(t1,*c);
 #else  #else
                 gen_simpup2_destructive(t,current_mod_gf2n);      gen_simpup2_destructive(t,current_mod_gf2n);
                 if ( !t || !t->w )      if ( !t || !t->w )
                         *c = 0;        *c = 0;
                 else      else
                         MKGF2N(t,*c);        MKGF2N(t,*c);
 #endif  #endif
         }    }
 }  }
   
 void divgf2n(a,b,c)  void divgf2n(GF2N a,GF2N b,GF2N *c)
 GF2N a,b;  
 GF2N *c;  
 {  {
         UP2 t,i,s;    UP2 t,i,s;
         GF2N z;    GF2N z;
   
         ptogf2n((Obj)a,&z); a = z; ptogf2n((Obj)b,&z); b = z;    ptogf2n((Obj)a,&z); a = z; ptogf2n((Obj)b,&z); b = z;
         if ( !b )    if ( !b )
                 error("divgf2n: division by 0");      error("divgf2n: division by 0");
         else if ( !a )    else if ( !a )
                 *c = 0;      *c = 0;
         else {    else {
                 gen_invup2(b->body,current_mod_gf2n,&i);      gen_invup2(b->body,current_mod_gf2n,&i);
                 mulup2(a->body,i,&t);      mulup2(a->body,i,&t);
                 gen_simpup2(t,current_mod_gf2n,&s);      gen_simpup2(t,current_mod_gf2n,&s);
                 MKGF2N(s,*c);      MKGF2N(s,*c);
         }    }
 }  }
   
 void invgf2n(b,c)  void invgf2n(GF2N b,GF2N *c)
 GF2N b;  
 GF2N *c;  
 {  {
         UP2 i;    UP2 i;
         GF2N z;    GF2N z;
   
         ptogf2n((Obj)b,&z); b = z;    ptogf2n((Obj)b,&z); b = z;
         if ( !b )    if ( !b )
                 error("divgf2n: division by 0");      error("divgf2n: division by 0");
         else {    else {
                 gen_invup2(b->body,current_mod_gf2n,&i);      gen_invup2(b->body,current_mod_gf2n,&i);
                 MKGF2N(i,*c);      MKGF2N(i,*c);
         }    }
 }  }
   
 void chsgngf2n(a,c)  void chsgngf2n(GF2N a,GF2N *c)
 GF2N a,*c;  
 {  {
         *c = a;    *c = a;
 }  }
   
 void pwrgf2n(a,b,c)  void pwrgf2n(GF2N a,Q b,GF2N *c)
 GF2N a;  
 Q b;  
 GF2N *c;  
 {  {
         UP2 t;    UP2 t;
         GF2N r;    GF2N r;
   
         if ( !b ) {    if ( !b ) {
                 MKGF2N(ONEUP2,*c);      MKGF2N(ONEUP2,*c);
         } else if ( !a )    } else if ( !a )
                 *c = 0;      *c = 0;
         else {    else {
                 gen_pwrmodup2(a->body,b,current_mod_gf2n,&t);      gen_pwrmodup2(a->body,b,current_mod_gf2n,&t);
                 MKGF2N(t,r);      MKGF2N(t,r);
                 if ( SGN(b) < 0 )      if ( SGN(b) < 0 )
                         invgf2n(r,c);        invgf2n(r,c);
                 else      else
                         *c = r;        *c = r;
         }    }
 }  }
   
 int cmpgf2n(a,b)  int cmpgf2n(GF2N a,GF2N b)
 GF2N a,b;  
 {  {
         GF2N z;    GF2N z;
   
         ptogf2n((Obj)a,&z); a = z; ptogf2n((Obj)b,&z); b = z;    ptogf2n((Obj)a,&z); a = z; ptogf2n((Obj)b,&z); b = z;
         if ( !a )    if ( !a )
                 if ( !b )      if ( !b )
                         return 0;        return 0;
                 else      else
                         return -1;        return -1;
         else if ( !b )    else if ( !b )
                         return 1;        return 1;
         else    else
                 return compup2(a->body,b->body);      return compup2(a->body,b->body);
 }  }
   
 void randomgf2n(r)  void randomgf2n(GF2N *r)
 GF2N *r;  
 {  {
         int i,w,d;    int i,w,d;
         unsigned int *tb;    unsigned int *tb;
         UP2 t;    UP2 t;
   
         if ( !current_mod_gf2n )    if ( !current_mod_gf2n )
                 error("randomgf2n : current_mod_gf2n is not set");      error("randomgf2n : current_mod_gf2n is not set");
         w = current_mod_gf2n->dense->w;    w = current_mod_gf2n->dense->w;
         d = degup2(current_mod_gf2n->dense);    d = degup2(current_mod_gf2n->dense);
         NEWUP2(t,w);    NEWUP2(t,w);
         for ( i = 0, tb = t->b; i < w; i++ )    for ( i = 0, tb = t->b; i < w; i++ )
                 tb[i] = mt_genrand();      tb[i] = mt_genrand();
         tb[w-1] &= (1<<(d%BSH))-1;    tb[w-1] &= (1<<(d%BSH))-1;
         for ( i = w-1; i >= 0 && !tb[i]; i-- );    for ( i = w-1; i >= 0 && !tb[i]; i-- );
         if ( i < 0 )    if ( i < 0 )
                 *r = 0;      *r = 0;
         else {    else {
                 t->w = i+1; MKGF2N(t,*r);      t->w = i+1; MKGF2N(t,*r);
         }    }
 }  }
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