/*
* 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'
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* MODIFICATIONS, EXTENSIONS, OR ADDITIONS TO THIS WARRANTY.
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* 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/real.c,v 1.1 2018/09/19 05:45:07 noro Exp $
*/
#include "ca.h"
#include "base.h"
#include <math.h>
double RatnToReal(Q a)
{
if ( INT(a) )
return mpz_get_d(BDY((Z)a));
else
return mpq_get_d(BDY((Q)a));
}
void addreal(Num a,Num b,Real *c)
{
double t;
t = ToReal(a)+ToReal(b); MKReal(t,*c);
}
void subreal(Num a,Num b,Real *c)
{
double t;
t = ToReal(a)-ToReal(b); MKReal(t,*c);
}
void mulreal(Num a,Num b,Real *c)
{
double t;
if ( !a || !b )
*c = 0;
else {
t = ToReal(a)*ToReal(b);
#if 0
if ( !t )
error("mulreal : Underflow"); /* XXX */
else
#endif
MKReal(t,*c);
}
}
void divreal(Num a,Num b,Real *c)
{
double t;
if ( !a )
*c = 0;
else {
t = ToReal(a)/ToReal(b);
#if 0
if ( !t )
error("divreal : Underflow"); /* XXX */
else
#endif
MKReal(t,*c);
}
}
void chsgnreal(Num a,Num *c)
{
double t;
Real s;
if ( !a )
*c = 0;
else if ( NID(a) == N_Q )
chsgnq((Q)a,(Q *)c);
else {
t = -ToReal(a); MKReal(t,s); *c = (Num)s;
}
}
void pwrreal(Num a,Num b,Real *c)
{
int e,ea;
double t;
double pwrreal0();
if ( !b )
MKReal(1.0,*c);
else if ( !a )
*c = 0;
else if ( !RATN(b) || !INT(b) || !smallz((Z)b) ) {
t = (double)pow((double)ToReal(a),(double)ToReal(b));
MKReal(t,*c);
} else {
e = mpz_get_si(BDY((Z)b));
ea = e>0?e:-e;
t = pwrreal0(BDY((Real)a),ea);
t = e>0?t:1/t;
MKReal(t,*c);
}
}
double pwrreal0(double n,int e)
{
double t;
if ( e == 1 )
return n;
else {
t = pwrreal0(n,e / 2);
return e%2 ? t*t*n : t*t;
}
}
int cmpreal(Real a,Real b)
{
double t;
t = ToReal(a)-ToReal(b);
return t>0.0 ? 1 : t<0.0?-1 : 0;
}