altoslib: Start restructuring AltosState harder

[fw/altos] / altoslib / AltosEeprom.java

diff --git a/altoslib/AltosEeprom.java b/altoslib/AltosEeprom.java
new file mode 100644 (file)
index 0000000..31646c7
--- /dev/null
+++ b/altoslib/AltosEeprom.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright © 2013 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+package org.altusmetrum.altoslib_1;
+
+import java.io.*;
+import java.util.*;
+import java.text.*;
+
+public abstract class AltosEeprom implements AltosStateUpdate {
+       public int      cmd;
+       public int      tick;
+       public int      data8[];
+       public boolean  valid;
+
+       public final static int header_length = 4;
+
+       public abstract void update_state(AltosState state);
+
+       public void write(PrintStream out) {
+               out.printf("%c %04x", cmd, tick);
+               if (data8 != null) {
+                       for (int i = 0; i < data8.length; i++)
+                               out.printf (" %02x", data8[i]);
+               }
+               out.printf ("\n");
+       }
+
+       void parse_chunk(AltosEepromChunk chunk, int start, int record_length) throws ParseException {
+               cmd = chunk.data(start);
+
+               int data_length = record_length - header_length;
+
+               valid = !chunk.erased(start, record_length);
+               if (valid) {
+                       if (AltosConvert.checksum(chunk.data, start, record_length) != 0)
+                               throw new ParseException(String.format("invalid checksum at 0x%x",
+                                                                      chunk.address + start), 0);
+               } else {
+                       cmd = AltosLib.AO_LOG_INVALID;
+               }
+
+               tick = chunk.data16(start+2);
+
+               data8 = new int[data_length];
+               for (int i = 0; i < data_length; i++)
+                       data8[i] = chunk.data(start + header_length + i);
+       }
+
+       void parse_string(String line, int record_length) {
+               valid = false;
+               tick = 0;
+               cmd = AltosLib.AO_LOG_INVALID;
+
+               int data_length = record_length - header_length;
+
+               if (line == null)
+                       return;
+               try {
+                       String[] tokens = line.split("\\s+");
+
+                       if (tokens[0].length() == 1) {
+                               if (tokens.length == 2 + data_length) {
+                                       cmd = tokens[0].codePointAt(0);
+                                       tick = Integer.parseInt(tokens[1],16);
+                                       valid = true;
+                                       data8 = new int[data_length];
+                                       for (int i = 0; i < data_length; i++)
+                                               data8[i] = Integer.parseInt(tokens[2 + i],16);
+                               }
+                       }
+               } catch (NumberFormatException ne) {
+               }
+       }
+}