From 62135d025507bee58eb20bef4bb4251b8f2a697d Mon Sep 17 00:00:00 2001
From: Daniel Kirschten <daniel.kirschten@gmx.de>
Date: Mon, 30 Sep 2019 14:06:54 +0200
Subject: [PATCH] Created MainMemoryParser

---
 .../memory/MainMemoryParseException.java      | 28 ++++++
 .../standard/memory/MainMemoryParser.java     | 96 +++++++++++++++++++
 2 files changed, 124 insertions(+)
 create mode 100644 plugins/net.mograsim.machine/src/net/mograsim/machine/standard/memory/MainMemoryParseException.java
 create mode 100644 plugins/net.mograsim.machine/src/net/mograsim/machine/standard/memory/MainMemoryParser.java

diff --git a/plugins/net.mograsim.machine/src/net/mograsim/machine/standard/memory/MainMemoryParseException.java b/plugins/net.mograsim.machine/src/net/mograsim/machine/standard/memory/MainMemoryParseException.java
new file mode 100644
index 00000000..5c6297e2
--- /dev/null
+++ b/plugins/net.mograsim.machine/src/net/mograsim/machine/standard/memory/MainMemoryParseException.java
@@ -0,0 +1,28 @@
+package net.mograsim.machine.standard.memory;
+
+import net.mograsim.machine.MachineException;
+
+public class MainMemoryParseException extends MachineException
+{
+
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 6820101808901789906L;
+
+	public MainMemoryParseException()
+	{
+		super();
+	}
+
+	public MainMemoryParseException(String message)
+	{
+		super(message);
+	}
+
+	public MainMemoryParseException(Throwable cause)
+	{
+		super(cause);
+	}
+
+}
diff --git a/plugins/net.mograsim.machine/src/net/mograsim/machine/standard/memory/MainMemoryParser.java b/plugins/net.mograsim.machine/src/net/mograsim/machine/standard/memory/MainMemoryParser.java
new file mode 100644
index 00000000..ea872961
--- /dev/null
+++ b/plugins/net.mograsim.machine/src/net/mograsim/machine/standard/memory/MainMemoryParser.java
@@ -0,0 +1,96 @@
+package net.mograsim.machine.standard.memory;
+
+import java.io.BufferedReader;
+import java.io.ByteArrayInputStream;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+
+import net.mograsim.logic.core.types.BitVector;
+import net.mograsim.machine.MainMemory;
+import net.mograsim.machine.MainMemoryDefinition;
+
+public class MainMemoryParser
+{
+	private final static String lineSeparator = System.getProperty("line.separator");
+
+	public static void parseMemory(final MainMemory memory, String inputPath) throws IOException
+	{
+		try (InputStream input = new FileInputStream(inputPath))
+		{
+			parseMemory(memory, input);
+		}
+	}
+
+	/**
+	 * @param input The input to parse must be in csv format; The stream is closed after being consumed.
+	 * 
+	 * @throws IOException
+	 */
+	public static MainMemory parseMemory(MainMemoryDefinition memDef, InputStream input) throws IOException
+	{
+		try
+		{
+			MainMemory memory = new WordAddressableMemory(memDef);
+			parseMemory(memory, input);
+			return memory;
+		}
+		catch (NullPointerException e)
+		{
+			throw new MainMemoryParseException(e);
+		}
+	}
+
+	/**
+	 *
+	 * @param input The input to parse must be in csv format; The stream is closed after being consumed.
+	 * 
+	 * @throws IOException
+	 */
+	public static void parseMemory(final MainMemory memory, InputStream input) throws IOException
+	{
+		try (BufferedReader reader = new BufferedReader(new InputStreamReader(input)))
+		{
+			MainMemoryDefinition def = memory.getDefinition();
+
+			long minAddr = def.getMinimalAddress();
+			long maxAddr = def.getMaximalAddress();
+
+			String line;
+			long i = minAddr;
+			try
+			{
+				for (; i <= maxAddr && reader.ready() && !"".equals((line = reader.readLine())); i++)
+				{
+					memory.setCell(i, BitVector.parse(line));
+				}
+			}
+			catch (IOException e)
+			{
+				e.printStackTrace();
+			}
+		}
+	}
+
+	public static InputStream write(MainMemory memory)
+	{
+		return new InputStream()
+		{
+			long instIndex = memory.getDefinition().getMinimalAddress(), maxAddress = memory.getDefinition().getMaximalAddress();
+			InputStream instStream = new ByteArrayInputStream(new byte[0]);
+
+			@Override
+			public int read() throws IOException
+			{
+				int val = instStream.read();
+				if (val == -1 && instIndex <= maxAddress)
+				{
+					instStream = new ByteArrayInputStream((memory.getCell(instIndex++).toString() + lineSeparator).getBytes());
+					val = instStream.read();
+				}
+				return val;
+			}
+		};
+	}
+}
-- 
2.17.1