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/*
 * Copyright (c) 2001-2017, Zoltan Farkas All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * Additionally licensed with:
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.spf4j.zel.instr;

import java.math.MathContext;
import org.spf4j.zel.operators.Operator;
import org.spf4j.zel.vm.ExecutionContext;

public final class MCTX extends Instruction {

  private static final long serialVersionUID = 1L;

  private final int precission;

  public MCTX(final int precission) {
    this.precission = precission;
  }

  @Override
  public int execute(final ExecutionContext context) {
    MathContext mc;
    switch (precission) {
      case 32:
        mc = MathContext.DECIMAL32;
        break;
      case 64:
        mc = MathContext.DECIMAL64;
        break;
      case 128:
        mc = MathContext.DECIMAL128;
        break;
      default:
        mc = new MathContext(precission);
    }
    context.setMathContext(mc);
    Operator.MATH_CONTEXT.set(mc);
    return 1;
  }

  @Override
  public Object[] getParameters() {
    return new Object[]{precission};
  }

}