/* $OpenXM: OpenXM_contrib2/asir2018/builtin/round.c,v 1.1 2018/09/19 05:45:06 noro Exp $ */

#undef INTERVAL
#define INTERVAL
#include "ca.h"
#include "parse.h"
#include "interval.h"

void Padd_pinf(),Padd_minf();
void Psub_pinf(),Psub_minf();
void Pmul_pinf(),Pmul_minf();
void Pdiv_pinf(),Pdiv_minf();

struct ftab round_tab[] = {
  {"add_pinf",Padd_pinf,2},
  {"add_minf",Padd_minf,2},
  {"sub_pinf",Psub_pinf,2},
  {"sub_minf",Psub_minf,2},
  {"mul_pinf",Pmul_pinf,2},
  {"mul_minf",Pmul_minf,2},
  {"div_pinf",Pdiv_pinf,2},
  {"div_minf",Pdiv_minf,2},
  {0,0,0},
};

void Padd_pinf(NODE arg,Real *rp)
{
  Real a,b,r;
  double c;

  a = (Real)ARG0(arg);
  b = (Real)ARG1(arg);
  if ( !a )
    *rp = b;
  else if ( !b )
    *rp = a;
  else if ( NID(a) != N_R || NID(b) != N_R )
    error("add_pinf : invalid argument");
  else {
    FPPLUSINF
    c = BDY(a)+BDY(b);
    FPNEAREST
    MKReal(c,r);
    *rp = r;
  }
}

void Padd_minf(NODE arg,Real *rp)
{
  Real a,b,r;
  double c;

  a = (Real)ARG0(arg);
  b = (Real)ARG1(arg);
  if ( !a )
    *rp = b;
  else if ( !b )
    *rp = a;
  else if ( NID(a) != N_R || NID(b) != N_R )
    error("add_pinf : invalid argument");
  else {
    FPMINUSINF
    c = BDY(a)+BDY(b);
    FPNEAREST
    MKReal(c,r);
    *rp = r;
  }
}

void Psub_pinf(NODE arg,Real *rp)
{
  Real a,b,r;
  double c;

  a = (Real)ARG0(arg);
  b = (Real)ARG1(arg);
  if ( !a ) {
    if ( !b )
      *rp = 0;
    else {
      c = -BDY(b);
      MKReal(c,r);
      *rp = r;
    }
  } else if ( !b )
    *rp = a;
  else if ( NID(a) != N_R || NID(b) != N_R )
    error("sub_pinf : invalid argument");
  else {
    FPPLUSINF
    c = BDY(a)-BDY(b);
    FPNEAREST
    MKReal(c,r);
    *rp = r;
  }
}

void Psub_minf(NODE arg,Real *rp)
{
  Real a,b,r;
  double c;

  a = (Real)ARG0(arg);
  b = (Real)ARG1(arg);
  if ( !a ) {
    if ( !b )
      *rp = 0;
    else {
      c = -BDY(b);
      MKReal(c,r);
      *rp = r;
    }
  } else if ( !b )
    *rp = a;
  else if ( NID(a) != N_R || NID(b) != N_R )
    error("sub_minf : invalid argument");
  else {
    FPMINUSINF
    c = BDY(a)-BDY(b);
    FPNEAREST
    MKReal(c,r);
    *rp = r;
  }
}

void Pmul_pinf(NODE arg,Real *rp)
{
  Real a,b,r;
  double c;

  a = (Real)ARG0(arg);
  b = (Real)ARG1(arg);
  if ( !a || !b )
    *rp = 0;
  else if ( NID(a) != N_R || NID(b) != N_R )
    error("mul_pinf : invalid argument");
  else {
    FPPLUSINF
    c = BDY(a)*BDY(b);
    FPNEAREST
    MKReal(c,r);
    *rp = r;
  }
}

void Pmul_minf(NODE arg,Real *rp)
{
  Real a,b,r;
  double c;

  a = (Real)ARG0(arg);
  b = (Real)ARG1(arg);
  if ( !a || !b )
    *rp = 0;
  else if ( NID(a) != N_R || NID(b) != N_R )
    error("mul_minf : invalid argument");
  else {
    FPMINUSINF
    c = BDY(a)*BDY(b);
    FPNEAREST
    MKReal(c,r);
    *rp = r;
  }
}

void Pdiv_pinf(NODE arg,Real *rp)
{
  Real a,b,r;
  double c;

  a = (Real)ARG0(arg);
  b = (Real)ARG1(arg);
  if ( !b )
    error("div_pinf : division by 0");
  else if ( !a )
    *rp = 0;
  else if ( NID(a) != N_R || NID(b) != N_R )
    error("div_pinf : invalid argument");
  else {
    FPPLUSINF
    c = BDY(a)/BDY(b);
    FPNEAREST
    MKReal(c,r);
    *rp = r;
  }
}

void Pdiv_minf(NODE arg,Real *rp)
{
  Real a,b,r;
  double c;

  a = (Real)ARG0(arg);
  b = (Real)ARG1(arg);
  if ( !b )
    error("div_minf : division by 0");
  else if ( !a )
    *rp = 0;
  else if ( NID(a) != N_R || NID(b) != N_R )
    error("div_minf : invalid argument");
  else {
    FPMINUSINF
    c = BDY(a)/BDY(b);
    FPNEAREST
    MKReal(c,r);
    *rp = r;
  }
}