/*
  QoreDivideEqualsOperatorNode.cpp
 
  Qore Programming Language
 
  Copyright (C) 2003 - 2015 David Nichols
 
  Permission is hereby granted, free of charge, to any person obtaining a
  copy of this software and associated documentation files (the "Software"),
  to deal in the Software without restriction, including without limitation
  the rights to use, copy, modify, merge, publish, distribute, sublicense,
  and/or sell copies of the Software, and to permit persons to whom the
  Software is furnished to do so, subject to the following conditions:

  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  DEALINGS IN THE SOFTWARE.

  Note that the Qore library is released under a choice of three open-source
  licenses: MIT (as above), LGPL 2+, or GPL 2+; see README-LICENSE for more
  information.
*/

#include <qore/Qore.h>

QoreString QoreDivideEqualsOperatorNode::op_str("/= operator expression");

AbstractQoreNode *QoreDivideEqualsOperatorNode::parseInitImpl(LocalVar *oflag, int pflag, int &lvids, const QoreTypeInfo *&typeInfo) {
   parseInitIntern(op_str.getBuffer(), oflag, pflag, lvids, typeInfo);

   return this;
}

QoreValue QoreDivideEqualsOperatorNode::evalValueImpl(bool& needs_deref, ExceptionSink* xsink) const {
   ValueEvalRefHolder res(right, xsink);
   if (*xsink)
      return QoreValue();

   // get ptr to current value (lvalue is locked for the scope of the LValueHelper object)
   LValueHelper v(left, xsink);
   if (!v)
      return QoreValue();

   // is either side a number?
   if (res->getType() == NT_NUMBER || v.getType() == NT_NUMBER) {
      // check for divide by zero
      if (res->getAsFloat() == 0.0) {
	 xsink->raiseException("DIVISION-BY-ZERO", "division by zero in arbitrary-precision numeric expression");
	 return QoreValue();
      }
      // FIXME: efficiency
      ReferenceHolder<> rh(res.getReferencedValue(), xsink);
      v.divideEqualsNumber(*rh, "</= operator>");
   }
   // is either side a float?
   else if (res->getType() == NT_FLOAT || v.getType() == NT_FLOAT) {
      double val = res->getAsFloat();
      if (val == 0.0) {
	 xsink->raiseException("DIVISION-BY-ZERO", "division by zero in floating-point expression");
	 return QoreValue();
      }
      return v.divideEqualsFloat(val, "</= operator>");
   }
   else { // do integer divide equals
      int64 val = res->getAsBigInt();
      if (!val) {
	 xsink->raiseException("DIVISION-BY-ZERO", "division by zero in integer expression");
	 return QoreValue();
      }
      // get new value if necessary
      return v.divideEqualsBigInt(val, "</= operator>");
   }

   // reference return value and return
   return ref_rv ? v.getReferencedValue() : QoreValue();
}
