plugins/net.mograsim.machine/src/net/mograsim/machine/standard/memory/MainMemoryParser.java

   1 package net.mograsim.machine.standard.memory;
   2
   3 import java.io.BufferedReader;
   4 import java.io.ByteArrayInputStream;
   5 import java.io.FileInputStream;
   6 import java.io.IOException;
   7 import java.io.InputStream;
   8 import java.io.InputStreamReader;
   9
  10 import net.mograsim.logic.core.types.BitVector;
  11 import net.mograsim.machine.MainMemory;
  12 import net.mograsim.machine.MainMemoryDefinition;
  13
  14 public class MainMemoryParser
  15 {
  16         private final static String lineSeparator = System.getProperty("line.separator");
  17
  18         public static void parseMemory(final MainMemory memory, String inputPath) throws IOException
  19         {
  20                 try (InputStream input = new FileInputStream(inputPath))
  21                 {
  22                         parseMemory(memory, input);
  23                 }
  24         }
  25
  26         /**
  27          * @param input The input to parse must be in csv format; The stream is closed after being consumed.
  28          *
  29          * @throws IOException
  30          */
  31         public static MainMemory parseMemory(MainMemoryDefinition memDef, InputStream input) throws IOException
  32         {
  33                 try
  34                 {
  35                         MainMemory memory = new WordAddressableMemory(memDef);
  36                         parseMemory(memory, input);
  37                         return memory;
  38                 }
  39                 catch (NullPointerException e)
  40                 {
  41                         throw new MainMemoryParseException(e);
  42                 }
  43         }
  44
  45         /**
  46          *
  47          * @param input The input to parse must be in csv format; The stream is closed after being consumed.
  48          *
  49          * @throws IOException
  50          */
  51         public static void parseMemory(final MainMemory memory, InputStream input) throws IOException
  52         {
  53                 try (BufferedReader reader = new BufferedReader(new InputStreamReader(input)))
  54                 {
  55                         MainMemoryDefinition def = memory.getDefinition();
  56
  57                         long minAddr = def.getMinimalAddress();
  58                         long maxAddr = def.getMaximalAddress();
  59
  60                         String line;
  61                         long i = minAddr;
  62                         try
  63                         {
  64                                 for (; i <= maxAddr && reader.ready() && !"".equals((line = reader.readLine())); i++)
  65                                 {
  66                                         memory.setCell(i, BitVector.parseBitstring(line));
  67                                 }
  68                         }
  69                         catch (IOException e)
  70                         {
  71                                 e.printStackTrace();
  72                         }
  73                 }
  74         }
  75
  76         public static InputStream write(MainMemory memory)
  77         {
  78                 return new InputStream()
  79                 {
  80                         long instIndex = memory.getDefinition().getMinimalAddress(), maxAddress = memory.getDefinition().getMaximalAddress();
  81                         InputStream instStream = new ByteArrayInputStream(new byte[0]);
  82
  83                         @Override
  84                         public int read() throws IOException
  85                         {
  86                                 int val = instStream.read();
  87                                 if (val == -1 && instIndex <= maxAddress)
  88                                 {
  89                                         instStream = new ByteArrayInputStream((memory.getCell(instIndex++).toBitstring() + lineSeparator).getBytes());
  90                                         val = instStream.read();
  91                                 }
  92                                 return val;
  93                         }
  94                 };
  95         }
  96 }