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