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

   1 /*
   2  * Copyright © 2017 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, either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  */
  14
  15 package org.altusmetrum.altoslib_11;
  16
  17 import java.util.*;
  18 import java.io.*;
  19
  20 public class AltosEepromNew {
  21
  22         private AltosJson       config;
  23         ArrayList<Byte>         data;
  24         private AltosConfigData config_data;
  25
  26         /*
  27          * Public accessor APIs
  28          */
  29         public int data8(int offset) {
  30                 return ((int) data.get(offset)) & 0xff;
  31         }
  32
  33         public int data16(int offset) {
  34                 return data8(offset) | (data8(offset+1) << 8);
  35         }
  36
  37         public int data24(int offset) {
  38                 return (data8(offset) |
  39                         (data8(offset+1) << 8) |
  40                         (data8(offset+2) << 16));
  41         }
  42
  43         public int data32(int offset) {
  44                 return (data8(offset) |
  45                         (data8(offset+1) << 8) |
  46                         (data8(offset+2) << 16) |
  47                         (data8(offset+3) << 24));
  48         }
  49
  50         public int size() {
  51                 return data.size();
  52         }
  53
  54         public AltosConfigData config_data() {
  55                 if (config_data == null) {
  56                         config_data = (AltosConfigData) config.make(AltosConfigData.class);
  57                         if (config_data == null)
  58                                 config_data = new AltosConfigData();
  59
  60                         if (config_data.log_format == AltosLib.MISSING) {
  61                                 if (config_data.product != null) {
  62                                         if (config_data.product.startsWith("TeleMetrum"))
  63                                                 config_data.log_format = AltosLib.AO_LOG_FORMAT_FULL;
  64                                         else if (config_data.product.startsWith("TeleMini"))
  65                                                 config_data.log_format = AltosLib.AO_LOG_FORMAT_TINY;
  66                                 }
  67                         }
  68                 }
  69                 return config_data;
  70         }
  71
  72         public void reset_config_data() {
  73                 config_data = null;
  74         }
  75
  76         private void write_config(Writer w) throws IOException {
  77                 config.write(w, 0, true);
  78                 w.append('\n');
  79         }
  80
  81         /*
  82          * Private I/O APIs
  83          */
  84         private void write_data(Writer w) throws IOException {
  85                 PrintWriter pw = new PrintWriter(w);
  86
  87                 for (int i = 0; i < data.size(); i++) {
  88                         if (i > 0) {
  89                                 if ((i & 0x1f) == 0)
  90                                         pw.printf("\n");
  91                                 else
  92                                         pw.printf(" ");
  93                         }
  94                         pw.printf("%02x", data.get(i));
  95                 }
  96                 w.append('\n');
  97         }
  98
  99         private boolean read_config(Reader r) throws IOException {
 100                 config = AltosJson.fromReader(r);
 101                 if (config == null)
 102                         return false;
 103                 return true;
 104         }
 105
 106         static private byte[] byte_list_to_array(List<Byte> bytes) {
 107                 byte[] data = new byte[bytes.size()];
 108                 int i = 0;
 109
 110                 for (Byte b : bytes) {
 111                         data[i++] = b;
 112                 }
 113                 return data;
 114         }
 115
 116         private boolean read_data(Reader r) throws IOException {
 117                 BufferedReader  br = new BufferedReader(r);
 118                 String          s;
 119
 120                 data = new ArrayList<Byte>();
 121                 while ((s = br.readLine()) != null) {
 122                         String[] tokens = s.split("\\s+");
 123
 124                         for (int i = 0; i < tokens.length; i++) {
 125                                 try {
 126                                         data.add((byte) AltosLib.fromhex(tokens[i]));
 127                                 } catch (NumberFormatException e) {
 128                                         throw new IOException(e.toString());
 129                                 }
 130                         }
 131                 }
 132                 return true;
 133         }
 134
 135         private boolean read_old_config(BufferedReader r) throws IOException {
 136                 AltosConfigData cfg = new AltosConfigData();
 137                 for (;;) {
 138                         boolean done = false;
 139
 140                         /* The data starts with an upper case F character followed by a space */
 141                         r.mark(2);
 142                         int     first = r.read();
 143                         if (first == 'F') {
 144                                 int second =  r.read();
 145                                 if (second == ' ')
 146                                         done = true;
 147                         }
 148                         r.reset();
 149                         if (done)
 150                                 break;
 151
 152                         String line = r.readLine();
 153                         if (line == null)
 154                                 return false;
 155                         cfg.parse_line(line);
 156                 }
 157                 config = new AltosJson(cfg);
 158                 return true;
 159         }
 160
 161         private boolean read_old_data(BufferedReader r) throws IOException {
 162                 String line;
 163
 164                 data = new ArrayList<Byte>();
 165                 while ((line = r.readLine()) != null) {
 166                         String[] tokens = line.split("\\s+");
 167
 168                         /* Make sure there's at least a type and time */
 169                         if (tokens.length < 2)
 170                                 break;
 171
 172                         /* packet type */
 173                         if (tokens[0].length() != 1)
 174                                 break;
 175                         int start = data.size();
 176
 177                         if (config_data().log_format != AltosLib.AO_LOG_FORMAT_TINY) {
 178                                 data.add((byte) tokens[0].codePointAt(0));
 179
 180                                 int time = AltosLib.fromhex(tokens[1]);
 181
 182                                 data.add((byte) 0);
 183                                 data.add((byte) (time & 0xff));
 184                                 data.add((byte) (time >> 8));
 185                         }
 186                         if (tokens.length == 4) {
 187                                 /* Handle ancient log files */
 188                                 if (config_data().log_format == AltosLib.AO_LOG_FORMAT_TINY) {
 189                                         /*
 190                                          * Ancient TeleMini log files stored "extra" data to pretend
 191                                          * that it was a TeleMetrum device. Throw that away and
 192                                          * just save the actual log data.
 193                                          */
 194                                         int a = AltosLib.fromhex(tokens[2]);
 195                                         int b = AltosLib.fromhex(tokens[3]);
 196                                         if (a != 0)
 197                                                 b = 0x8000 | a;
 198                                         data.add((byte) (b & 0xff));
 199                                         data.add((byte) ((b >> 8)));
 200                                 } else {
 201                                         for (int i = 2; i < tokens.length; i++) {
 202                                                 int v = AltosLib.fromhex(tokens[i]);
 203                                                 data.add((byte) (v & 0xff));
 204                                                 data.add((byte) ((v >> 8)));
 205                                         }
 206                                         /* Re-compute the checksum byte */
 207                                         data.set(start + 1, (byte) (256 - AltosConvert.checksum(data, start, data.size() - start)));
 208                                 }
 209                         } else {
 210                                 for (int i = 2; i < tokens.length; i++)
 211                                         data.add((byte) AltosLib.fromhex(tokens[i]));
 212                                 /* Re-compute the checksum byte */
 213                                 data.set(start + 1, (byte) (256 - AltosConvert.checksum(data, start, data.size() - start)));
 214                         }
 215                 }
 216                 return true;
 217         }
 218
 219         private void read(Reader r) throws IOException {
 220                 BufferedReader  br = new BufferedReader(r);
 221
 222                 br.mark(1);
 223                 int c = br.read();
 224                 br.reset();
 225
 226                 if (c == '{') {
 227                         if (!read_config(br))
 228                                 throw new IOException("failed to read config");
 229                         if (!read_data(br))
 230                                 throw new IOException("failed to read data");
 231                 } else {
 232                         if (!read_old_config(br))
 233                                 throw new IOException("failed to read old config");
 234                         if (!read_old_data(br))
 235                                 throw new IOException("failed to read old data");
 236                 }
 237         }
 238
 239         /*
 240          * Public APIs for I/O
 241          */
 242         public void write(Writer w) throws IOException {
 243                 write_config(w);
 244                 write_data(w);
 245         }
 246
 247         public String toString() {
 248                 try {
 249                         Writer  w = new StringWriter();
 250
 251                         write(w);
 252                         return w.toString();
 253                 } catch (Exception e) {
 254                         return null;
 255                 }
 256         }
 257
 258         public void print() throws IOException {
 259                 System.out.printf("%s", toString());
 260         }
 261
 262         /*
 263          * Constructors
 264          */
 265         public AltosEepromNew(Reader r) throws IOException {
 266                 read(r);
 267         }
 268
 269         public AltosEepromNew(String s) throws IOException {
 270                 read(new StringReader(s));
 271         }
 272
 273         public AltosEepromNew() {
 274         }
 275 }