/*
 * 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/asir2018/engine/gfpn.c,v 1.1 2018/09/19 05:45:07 noro Exp $
*/
#include "ca.h"
#include "base.h"

void chsgngfpn(GFPN,GFPN *);

UP current_mod_gfpn;

void setmod_gfpn(P p)
{
  UP t;

  ptoup(p,&t); uptolmup(t,&current_mod_gfpn);
}

void getmod_gfpn(UP *up)
{
  *up = current_mod_gfpn;
}

void ptogfpn(Obj q,GFPN *l)
{
  UP q1,q2;

  if ( !q || (OID(q)==O_N && NID(q)==N_GFPN) ) {
    *l = (GFPN)q;
  } else if ( (OID(q)==O_N && NID(q)==N_Q) || OID(q)==O_P ) {
    ptoup((P)q,&q1); uptolmup(q1,&q2);
    MKGFPN(q2,*l);
  } else
    error("ptogfpn : invalid argument");
}

void gfpntop(GFPN q,P *l)
{
  if ( !q )
    *l = 0;
  else if ( NID(q) == N_GFPN )
    uptop(q->body,l);
  else
    *l = (P)q;
}

void simpgfpn(GFPN n,GFPN *r)
{
  UP rem,t;

  if ( !n )
    *r = 0;
  else if ( NID(n) != N_GFPN )
    *r = n;
  else {
    simpup(n->body,&t);
    remup(t,current_mod_gfpn,&rem);
    MKGFPN(rem,*r);
  }
}

#define NZGFPN(a) ((a)&&(OID(a)==O_N)&&(NID(a)==N_GFPN))

void ntogfpn(Obj a,GFPN *b)
{
  UP t;
  LM lm;

  if ( !a || (OID(a)==O_N && NID(a) == N_GFPN) )
    *b = (GFPN)a;
  else if ( OID(a) == O_N && (NID(a) == N_LM || NID(a) == N_Q) ) {
    qtolm((Q)a,&lm);
    if ( !lm )
      *b = 0;
    else {
      t = UPALLOC(0); t->d = 0; t->c[0] = (Num)lm;
      MKGFPN(t,*b);
    }
  } else
    error("ntogfpn : invalid argument");
}

void addgfpn(GFPN a,GFPN b,GFPN *c)
{
  UP t,t1,t2;
  GFPN z;

  ntogfpn((Obj)a,&z); a = z; ntogfpn((Obj)b,&z); b = z;
  if ( !a )
    *c = b;
  else if ( !b )
    *c = a;
  else {
    addup(a->body,b->body,&t);
    simpup(t,&t1);
    remup(t1,current_mod_gfpn,&t2);
    MKGFPN(t2,*c);
  }
}

void subgfpn(GFPN a,GFPN b,GFPN *c)
{
  UP t,t1,t2;
  GFPN z;

  ntogfpn((Obj)a,&z); a = z; ntogfpn((Obj)b,&z); b = z;
  if ( !a )
    chsgngfpn(b,c);
  else if ( !b )
    *c = a;
  else {
    subup(a->body,b->body,&t);
    simpup(t,&t1);
    remup(t1,current_mod_gfpn,&t2);
    MKGFPN(t2,*c);
  }
}

extern int up_lazy;

void mulgfpn(GFPN a,GFPN b,GFPN *c)
{
  UP t,t1,t2;
  GFPN z;

  ntogfpn((Obj)a,&z); a = z; ntogfpn((Obj)b,&z); b = z;
  if ( !a || !b )
    *c = 0;
  else {
    up_lazy=1;
    mulup(a->body,b->body,&t);
    up_lazy=0;
    simpup(t,&t1);
    remup(t1,current_mod_gfpn,&t2);
    MKGFPN(t2,*c);  
  }
}

void squaregfpn(GFPN a,GFPN *c)
{
  UP t,t1,t2;
  GFPN z;

  ntogfpn((Obj)a,&z); a = z;
  if ( !a )
    *c = 0;
  else {
    squareup(a->body,&t);
    simpup(t,&t1);
    remup(t1,current_mod_gfpn,&t2);
    MKGFPN(t2,*c);  
  }
}

void divgfpn(GFPN a,GFPN b,GFPN *c)
{
  UP t,t1,i,s;
  GFPN z;

  ntogfpn((Obj)a,&z); a = z; ntogfpn((Obj)b,&z); b = z;
  if ( !b )
    error("divgfpn: division by 0");
  else if ( !a )
    *c = 0;
  else {
    extended_gcdup(b->body,current_mod_gfpn,&i);
    mulup(a->body,i,&t);
    simpup(t,&t1);
    remup(t1,current_mod_gfpn,&s);
    MKGFPN(s,*c);
  }
}

void invgfpn(GFPN b,GFPN *c)
{
  UP i,t;
  GFPN z;

  ntogfpn((Obj)b,&z); b = z;
  if ( !b )
    error("divgfpn: division by 0");
  else {
    simpup(b->body,&t);
    extended_gcdup(t,current_mod_gfpn,&i);
    MKGFPN(i,*c);
  }
}

void chsgngfpn(GFPN a,GFPN *c)
{
  GFPN z;
  UP t,t1;

  ntogfpn((Obj)a,&z); a = z;
  if ( !a )
    *c = 0;
  else {
    simpup(a->body,&t);
    chsgnup(t,&t1);
    MKGFPN(t1,*c);
  }
}

void pwrgfpn(GFPN a,Z b,GFPN *c)
{
  UP t,s;
  GFPN r;
  Z b0;

  if ( !b ) {
    t = UPALLOC(0); t->d = 0; t->c[0] = (Num)ONELM; MKGFPN(t,*c);
  } else if ( !a )
    *c = 0;
  else {
    absz(b,&b0);
    simpup(a->body,&s);
    hybrid_generic_powermodup(s,current_mod_gfpn,b0,&t);
    MKGFPN(t,r);
    if ( sgnz(b) < 0 )
      invgfpn(r,c);
    else
      *c = r;
  }
}

int cmpgfpn(GFPN a,GFPN b)
{
  GFPN z;

  ntogfpn((Obj)a,&z); a = z; ntogfpn((Obj)b,&z); b = z;
  if ( !a )
    if ( !b )
      return 0;
    else
      return -1;
  else if ( !b )
      return 1;
  else
    return compup(a->body,b->body);
}

void randomgfpn(GFPN *r)
{
  int i,d;
  LM *tb;
  UP t;

  if ( !current_mod_gfpn )
    error("randomgfpn : current_mod_gfpn is not set");
  d = current_mod_gfpn->d;
  t = UPALLOC(d-1);
  for ( i = 0, tb = (LM *)t->c; i < d; i++ )
    random_lm(&tb[i]);
  for ( i = d-1; i >= 0 && !tb[i]; i-- );
  if ( i < 0 )
    *r = 0;
  else {
    t->d = i; MKGFPN(t,*r);
  }
}