plugins/net.mograsim.logic.model.verilog/src/net/mograsim/logic/model/verilog/model/expressions/Constant.java

   1 package net.mograsim.logic.model.verilog.model.expressions;
   2
   3 import java.util.Set;
   4
   5 import net.mograsim.logic.core.types.BitVector;
   6 import net.mograsim.logic.model.verilog.model.signals.Signal;
   7
   8 public class Constant extends Expression
   9 {
  10         private final BitVector constant;
  11
  12         public Constant(BitVector constant)
  13         {
  14                 super(constant.length());
  15                 this.constant = constant;
  16
  17                 check();
  18         }
  19
  20         private void check()
  21         {
  22                 if (!constant.isBinary())
  23                         throw new IllegalArgumentException("Constant is not binary: " + constant);
  24         }
  25
  26         public BitVector getConstant()
  27         {
  28                 return constant;
  29         }
  30
  31         @Override
  32         public String toVerilogCode()
  33         {
  34                 return getWidth() + "'b" + constant.toBitstring();
  35         }
  36
  37         @Override
  38         public Set<Signal> getReferencedSignals()
  39         {
  40                 return Set.of();
  41         }
  42
  43         @Override
  44         public int hashCode()
  45         {
  46                 final int prime = 31;
  47                 int result = super.hashCode();
  48                 result = prime * result + ((constant == null) ? 0 : constant.hashCode());
  49                 return result;
  50         }
  51
  52         @Override
  53         public boolean equals(Object obj)
  54         {
  55                 if (this == obj)
  56                         return true;
  57                 if (!super.equals(obj))
  58                         return false;
  59                 if (getClass() != obj.getClass())
  60                         return false;
  61                 Constant other = (Constant) obj;
  62                 if (constant == null)
  63                 {
  64                         if (other.constant != null)
  65                                 return false;
  66                 } else if (!constant.equals(other.constant))
  67                         return false;
  68                 return true;
  69         }
  70 }