content: /*
   * Copyright (C) 2016-2023 ActionTech.
   * License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher.
   */
  
  /**
   *
   */
  package com.actiontech.dble.plan.common.item.function.operator.cmpfunc;
  
  import com.actiontech.dble.plan.common.item.Item;
  import com.actiontech.dble.plan.common.item.function.ItemFunc;
  import com.actiontech.dble.plan.common.item.function.operator.ItemBoolFunc2;
  
  import java.math.BigInteger;
  import java.util.List;
  
  
  public class ItemFuncStrcmp extends ItemBoolFunc2 {
  
      /**
       * @param a
       * @param b
       */
      public ItemFuncStrcmp(Item a, Item b, int charsetIndex) {
          super(a, b, charsetIndex);
      }
  
      @Override
      public final String funcName() {
          return "strcmp";
      }
  
      @Override
      public BigInteger valInt() {
          String a = args.get(0).valStr();
          String b = args.get(1).valStr();
          if (a == null || b == null) {
              nullValue = true;
              return BigInteger.ZERO;
          }
          int value = a.compareTo(b);
          nullValue = false;
          return value == 0 ? BigInteger.ZERO : (value < 0 ? BigInteger.valueOf(-1) : BigInteger.ONE);
      }
  
      @Override
      public ItemFunc nativeConstruct(List<Item> realArgs) {
          return new ItemFuncStrcmp(realArgs.get(0), realArgs.get(1), this.charsetIndex);
      }
  }
  