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.strfunc;
  
  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.primary.ItemIntFunc;
  
  import java.math.BigInteger;
  import java.util.List;
  
  
  public class ItemFuncAscii extends ItemIntFunc {
  
      public ItemFuncAscii(List<Item> args, int charsetIndex) {
          super(args, charsetIndex);
      }
  
      @Override
      public final String funcName() {
          return "ascii";
      }
  
      @Override
      public BigInteger valInt() {
          String s = args.get(0).valStr();
          if (args.get(0).isNull()) {
              this.nullValue = true;
              return BigInteger.ZERO;
          } else {
              if (s.length() == 0) {
                  return BigInteger.ZERO;
              } else {
                  return BigInteger.valueOf((int) s.charAt(0));
              }
          }
      }
  
      @Override
      public ItemFunc nativeConstruct(List<Item> realArgs) {
          return new ItemFuncAscii(realArgs, charsetIndex);
      }
  }
  