/********************************************************************
This file is part of the abs 0.907 distribution.  abs is a spreadsheet
with graphical user interface.

Copyright (C) 1998-2001  André Bertin (Andre.Bertin@ping.be) 

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version if in the same spirit as version 2.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

Concact: abs@pi.be
         http://home.pi.be/bertin/abs.shtml

*********************************************************************/



























#include <stdio.h>
#include "formula_interpret.h"
#include "interpret.h"
#include "y.tab.h"
#include "oper.h"
#include "symboltable.h"
#include "cell_vb.h"
#include "properties.h"

#define PRINTOBJ


static int brk = 0;
static int err = 0;
static int warn = 0;

int 
message (char *txt)
{
  if (brk)
    fprintf (stderr, "Break: %s\n", txt);
  if (warn)
    fprintf (stderr, "Warning: %s\n", txt);
  if (err)
    fprintf (stderr, "Error: %s\n", txt);
  return 0;
}

obj 
exform (nodeType * p)
{
  obj o;
  if (!p || brk || err)
    return o;
  switch (p->type)
    {
    case typeCon:
      {
	o = p->con.value;
	PRINTOBJ return o;
      }
    case typeId:
      {
	Idval *val;
	if (p->id.id.type == BUILTINFUNCTION)
	  {			
	    o = check4property (p->id.id);
	    if (o.type != BUILTINFUNCTION)
	      return o;
	  }
	if (p->id.id.type == PROPERTY)
	  {
	    o = property2obj (p->id.id);
	    return o;
	  }
	val = look (p->id.id.label, 1);

	o.rec.s = (char *) val;
	o.type = p->id.id.type;	
	o.label = p->id.id.label;

	PRINTOBJ
	  return o;

      }
    case typeOpr1:
      switch (p->opr1.oper.rec.i)
	{
	case UMINUS:
	  return mkuminus (exform (p->opr1.op1));
	}
    case typeOpr2:
      switch (p->opr2.oper.rec.i)
	{
	case '+':
	  {
	    obj o1, o2, o3;
	    o1 = exform (p->opr2.op1);
	    o2 = exform (p->opr2.op2);
	    o3 = mksum (o1, o2);
	    freenocstobj (o1);
	    freenocstobj (o2);
	    return o3;
	  }
	case '-':
	  {
	    obj o1, o2, o3;
	    o1 = exform (p->opr2.op1);
	    o2 = exform (p->opr2.op2);
	    o3 = mkdiff (o1, o2);
	    freenocstobj (o1);
	    freenocstobj (o2);
	    return o3;
	  }
	case '*':
	  {
	    obj o1, o2, o3;
	    o1 = exform (p->opr2.op1);
	    o2 = exform (p->opr2.op2);
	    o3 = mkmult (o1, o2);
	    freenocstobj (o1);
	    freenocstobj (o2);
	    return o3;
	  }
	case '/':
	  {
	    obj o1, o2, o3;
	    o1 = exform (p->opr2.op1);
	    o2 = exform (p->opr2.op2);
	    o3 = mkdiv (o1, o2);
	    freenocstobj (o1);
	    freenocstobj (o2);
	    return o3;
	  }
	case MOD:
	  {
	    obj o1, o2, o3;
	    o1 = exform (p->opr2.op1);
	    o2 = exform (p->opr2.op2);
	    o3 = mkmod (o1, o2);
	    freenocstobj (o1);
	    freenocstobj (o2);
	    return o3;
	  }
	case '\\':
	  {
	    obj o1, o2, o3;
	    o1 = exform (p->opr2.op1);
	    o2 = exform (p->opr2.op2);
	    o3 = mkintdiv (o1, o2);
	    freenocstobj (o1);
	    freenocstobj (o2);
	    return o3;
	  }
	case '^':
	  {
	    obj o1, o2, o3;
	    o1 = exform (p->opr2.op1);
	    o2 = exform (p->opr2.op2);
	    o3 = mkpow (o1, o2);
	    freenocstobj (o1);
	    freenocstobj (o2);
	    return o3;
	  }


	}
    case typeOpr:
      switch (p->opr.oper.rec.i)
	{
	case CALL:
	  {
	    argcall ();
	    exform (p->opr.op[1]);
	    switch ((p->opr.op[0])->id.id.type)		
	      {
	      case IDENTIFIER:
		o = mkcall (exform (p->opr.op[0]));
		break;
	      case BUILTINFUNCTION:
		o = mkcallbuiltin ((p->opr.op[0])->id.id);
		break;
	      }
	    argendcall ();
	    PRINTOBJ
	      return o;
	  }
	case ARG:
	  {
	    switch (p->opr.nops)
	      {
	      case 0:
		return o;
	      case 1:
		{
		  o = mkarg (p->opr.op[0]);
		  PRINTOBJ return o;
		}
	      case 2:
		{
		  o = exform (p->opr.op[0]);
		  o = mkarg (p->opr.op[1]);
		  PRINTOBJ return o;
		}
	      }
	    PRINTOBJ return o;	
	  }
	case BUILTINFUNCTION:
	  {			
	    argcall ();
	    exform (p->opr.op[1]);
	    o = mkcallbuiltin ((p->opr.op[0])->id.id);
	    argendcall ();

	    PRINTOBJ return o;
	  }

	case LT:
	  {
	    obj o1, o2, o3;
	    o1 = exform (p->opr.op[0]);
	    o2 = exform (p->opr.op[1]);
	    o3 = mklt (o1, o2);
	    freenocstobj (o1);
	    freenocstobj (o2);
	    return o3;
	  }
	case GT:
	  {
	    obj o1, o2, o3;
	    o1 = exform (p->opr.op[0]);
	    o2 = exform (p->opr.op[1]);
	    o3 = mkgt (o1, o2);
	    freenocstobj (o1);
	    freenocstobj (o2);
	    return o3;
	  }
	case GE:
	  {
	    obj o1, o2, o3;
	    o1 = exform (p->opr.op[0]);
	    o2 = exform (p->opr.op[1]);
	    o3 = mkge (o1, o2);
	    freenocstobj (o1);
	    freenocstobj (o2);
	    return o3;
	  }
	case LE:
	  {
	    obj o1, o2, o3;
	    o1 = exform (p->opr.op[0]);
	    o2 = exform (p->opr.op[1]);
	    o3 = mkle (o1, o2);
	    freenocstobj (o1);
	    freenocstobj (o2);
	    return o3;
	  }
	case NE:
	  {
	    obj o1, o2, o3;
	    o1 = exform (p->opr.op[0]);
	    o2 = exform (p->opr.op[1]);
	    o3 = mkne (o1, o2);
	    freenocstobj (o1);
	    freenocstobj (o2);
	    return o3;
	  }
	case EQ:
	  {
	    obj o1, o2, o3;
	    o1 = exform (p->opr.op[0]);
	    o2 = exform (p->opr.op[1]);
	    o3 = mkeq (o1, o2);
	    freenocstobj (o1);
	    freenocstobj (o2);
	    return o3;
	  }
	case OR:
	  {
	    obj o1, o2, o3;
	    o1 = exform (p->opr.op[0]);
	    o2 = exform (p->opr.op[1]);
	    o3 = mkor (o1, o2);
	    freenocstobj (o1);
	    freenocstobj (o2);
	    return o3;
	  }
	case AND:
	  {
	    obj o1, o2, o3;
	    o1 = exform (p->opr.op[0]);
	    o2 = exform (p->opr.op[1]);
	    o3 = mkand (o1, o2);
	    freenocstobj (o1);
	    freenocstobj (o2);
	    return o3;
	  }
	case XOR:
	  {
	    obj o1, o2, o3;
	    o1 = exform (p->opr.op[0]);
	    o2 = exform (p->opr.op[1]);
	    o3 = mkxor (o1, o2);
	    freenocstobj (o1);
	    freenocstobj (o2);
	    return o3;
	  }
	case '&':
	  {
	    obj o1, o2, o3;
	    o1 = exform (p->opr.op[0]);
	    o2 = exform (p->opr.op[1]);
	    o3 = mkconcat (o1, o2);
	    freenocstobj (o1);
	    freenocstobj (o2);
	    return o3;
	  }
	case NOT:
	  {
	    obj o1, o3;
	    o1 = exform (p->opr.op[0]);
	    o3 = mknot (o1);
	    freenocstobj (o1);
	    return o3;
	  }
	}
    default:
      break;
    }
  return o;
}