plugins/net.mograsim.logic.core/src/net/mograsim/logic/core/types/BitVectorFormatter.java

   1 package net.mograsim.logic.core.types;
   2
   3 import java.math.BigInteger;
   4
   5 import net.mograsim.logic.core.wires.CoreWire.ReadEnd;
   6 import net.mograsim.preferences.ColorDefinition;
   7 import net.mograsim.preferences.ColorDefinition.BuiltInColor;
   8 import net.mograsim.preferences.Preferences;
   9
  10 public class BitVectorFormatter
  11 {
  12         public static String formatValueAsString(ReadEnd end)
  13         {
  14                 return formatAsString(end == null ? null : end.getValues());
  15         }
  16
  17         public static String toBitstring(BitVector bitVector)
  18         {
  19                 return bitVector.toBitstring();
  20         }
  21
  22         public static String formatAsString(BitVector bitVector)
  23         {
  24                 if (bitVector == null)
  25                         return "null";
  26                 if (bitVector.isBinary())
  27                 {
  28                         String hexdigits = bitVector.getUnsignedValue().toString(16);
  29                         StringBuilder sb = new StringBuilder();
  30                         sb.append("0x");
  31                         sb.append("0".repeat((bitVector.length() + 3) / 4 - hexdigits.length()));
  32                         sb.append(hexdigits);
  33                         return sb.toString();
  34                 }
  35                 if (bitVector.isHighImpedance())
  36                         return "-";
  37                 return bitVector.toBitstring();
  38         }
  39
  40         // TODO this method overlaps in functionality with AsmNumberUtil (in plugin.core)
  41         public static BitVector parseUserBitVector(String userInput, int width)
  42         {
  43                 BitVector bitvector = null;
  44                 if (width > 0 && userInput.matches("0x[0-9a-fA-F]+"))
  45                         // TODO should we check for overflows?
  46                         bitvector = BitVector.from(new BigInteger(userInput.substring(2), 16), width);
  47                 else if (width <= 0 || userInput.length() == width)
  48                         // TODO do this without exceptions
  49                         try
  50                         {
  51                                 bitvector = BitVector.parseBitstring(userInput);
  52                         }
  53                         catch (@SuppressWarnings("unused") NullPointerException x)
  54                         {
  55                                 // ignore
  56                         }
  57                 if (bitvector == null && width > 0)
  58                         try
  59                         {
  60                                 // TODO should we check for overflows?
  61                                 bitvector = BitVector.from(new BigInteger(userInput), width);
  62                         }
  63                         catch (@SuppressWarnings("unused") NumberFormatException x)
  64                         {
  65                                 // ignore
  66                         }
  67                 return bitvector;
  68         }
  69
  70         // TODO doesn't this belong to logic.model?
  71         public static ColorDefinition formatAsColor(ReadEnd end)
  72         {
  73                 return formatAsColor(end == null ? null : end.getValues());
  74         }
  75
  76         public static ColorDefinition formatAsColor(BitVector bitVector)
  77         {
  78                 // TODO maybe find a color assignment for multiple-bit bit vectors?
  79                 if (bitVector == null || bitVector.length() != 1)
  80                         return new ColorDefinition(BuiltInColor.COLOR_BLACK);
  81                 switch (bitVector.getLSBit(0))
  82                 {
  83                 case ONE:
  84                         return Preferences.current().getColorDefinition("net.mograsim.logic.model.color.bit.one");
  85                 case U:
  86                         return Preferences.current().getColorDefinition("net.mograsim.logic.model.color.bit.u");
  87                 case X:
  88                         return Preferences.current().getColorDefinition("net.mograsim.logic.model.color.bit.x");
  89                 case Z:
  90                         return Preferences.current().getColorDefinition("net.mograsim.logic.model.color.bit.z");
  91                 case ZERO:
  92                         return Preferences.current().getColorDefinition("net.mograsim.logic.model.color.bit.zero");
  93                 default:
  94                         throw new IllegalArgumentException("Unknown enum constant: " + bitVector.getLSBit(0));
  95                 }
  96         }
  97
  98         private BitVectorFormatter()
  99         {
 100                 throw new UnsupportedOperationException("No BitVectorFormatter instances");
 101         }
 102 }