git.gag.com Git - fw/altos/blob - altoslib/AltosOrderedRecord.java

   1 /*
   2  * Copyright © 2010 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 package org.altusmetrum.AltosLib;
  19
  20 import java.text.ParseException;
  21
  22 /*
  23  * AltosRecords with an index field so they can be sorted by tick while preserving
  24  * the original ordering for elements with matching ticks
  25  */
  26 class AltosOrderedRecord extends AltosEepromRecord implements Comparable<AltosOrderedRecord> {
  27
  28         public int      index;
  29
  30         public AltosOrderedRecord(String line, int in_index, int prev_tick, boolean prev_tick_valid)
  31                 throws ParseException {
  32                 super(line);
  33                 if (prev_tick_valid) {
  34                         tick |= (prev_tick & ~0xffff);
  35                         if (tick < prev_tick) {
  36                                 if (prev_tick - tick > 0x8000)
  37                                         tick += 0x10000;
  38                         } else {
  39                                 if (tick - prev_tick > 0x8000)
  40                                         tick -= 0x10000;
  41                         }
  42                 }
  43                 index = in_index;
  44         }
  45
  46         public AltosOrderedRecord(int in_cmd, int in_tick, int in_a, int in_b, int in_index) {
  47                 super(in_cmd, in_tick, in_a, in_b);
  48                 index = in_index;
  49         }
  50
  51         public String toString() {
  52                 return String.format("%d.%d %04x %04x %04x",
  53                                      cmd, index, tick, a, b);
  54         }
  55
  56         public int compareTo(AltosOrderedRecord o) {
  57                 int     tick_diff = tick - o.tick;
  58                 if (tick_diff != 0)
  59                         return tick_diff;
  60                 return index - o.index;
  61         }
  62 }
  63