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         private boolean read_data(Reader r) throws IOException {
 107                 BufferedReader  br = new BufferedReader(r);
 108                 String          s;
 109
 110                 data = new ArrayList<Byte>();
 111                 while ((s = br.readLine()) != null) {
 112
 113                         String[] tokens = s.split("\\s+");
 114
 115                         for (int i = 0; i < tokens.length; i++) {
 116                                 if (tokens[i].length() > 0) {
 117                                         try {
 118                                                 data.add((byte) AltosLib.fromhex(tokens[i]));
 119                                         } catch (NumberFormatException e) {
 120                                                 throw new IOException(e.toString());
 121                                         }
 122                                 }
 123                         }
 124                 }
 125                 return true;
 126         }
 127
 128         private boolean read_old_config(BufferedReader r) throws IOException {
 129                 AltosConfigData cfg = new AltosConfigData();
 130                 for (;;) {
 131                         boolean done = false;
 132
 133                         /* The data starts with an upper case F character followed by a space */
 134                         r.mark(2);
 135                         int     first = r.read();
 136                         if (first == 'F') {
 137                                 int second =  r.read();
 138                                 if (second == ' ')
 139                                         done = true;
 140                         }
 141                         r.reset();
 142                         if (done)
 143                                 break;
 144
 145                         String line = r.readLine();
 146                         if (line == null)
 147                                 return false;
 148                         cfg.parse_line(line);
 149                 }
 150                 config = new AltosJson(cfg);
 151                 return true;
 152         }
 153
 154         private boolean read_old_data(BufferedReader r) throws IOException {
 155                 String line;
 156
 157                 data = new ArrayList<Byte>();
 158                 while ((line = r.readLine()) != null) {
 159                         String[] tokens = line.split("\\s+");
 160
 161                         /* Make sure there's at least a type and time */
 162                         if (tokens.length < 2)
 163                                 break;
 164
 165                         /* packet type */
 166                         if (tokens[0].length() != 1)
 167                                 break;
 168                         int start = data.size();
 169
 170                         if (config_data().log_format != AltosLib.AO_LOG_FORMAT_TINY) {
 171                                 data.add((byte) tokens[0].codePointAt(0));
 172
 173                                 int time = AltosLib.fromhex(tokens[1]);
 174
 175                                 data.add((byte) 0);
 176                                 data.add((byte) (time & 0xff));
 177                                 data.add((byte) (time >> 8));
 178                         }
 179                         if (tokens.length == 4) {
 180                                 /* Handle ancient log files */
 181                                 if (config_data().log_format == AltosLib.AO_LOG_FORMAT_TINY) {
 182                                         /*
 183                                          * Ancient TeleMini log files stored "extra" data to pretend
 184                                          * that it was a TeleMetrum device. Throw that away and
 185                                          * just save the actual log data.
 186                                          */
 187                                         int a = AltosLib.fromhex(tokens[2]);
 188                                         int b = AltosLib.fromhex(tokens[3]);
 189                                         if (a != 0)
 190                                                 b = 0x8000 | a;
 191                                         data.add((byte) (b & 0xff));
 192                                         data.add((byte) ((b >> 8)));
 193                                 } else {
 194                                         for (int i = 2; i < tokens.length; i++) {
 195                                                 int v = AltosLib.fromhex(tokens[i]);
 196                                                 data.add((byte) (v & 0xff));
 197                                                 data.add((byte) ((v >> 8)));
 198                                         }
 199                                         /* Re-compute the checksum byte */
 200                                         data.set(start + 1, (byte) (256 - AltosConvert.checksum(data, start, data.size() - start)));
 201                                 }
 202                         } else {
 203                                 for (int i = 2; i < tokens.length; i++)
 204                                         data.add((byte) AltosLib.fromhex(tokens[i]));
 205                                 /* Re-compute the checksum byte */
 206                                 data.set(start + 1, (byte) (256 - AltosConvert.checksum(data, start, data.size() - start)));
 207                         }
 208                 }
 209                 return true;
 210         }
 211
 212         private void read(Reader r) throws IOException {
 213                 BufferedReader  br = new BufferedReader(r);
 214
 215                 br.mark(1);
 216                 int c = br.read();
 217                 br.reset();
 218
 219                 if (c == '{') {
 220                         if (!read_config(br))
 221                                 throw new IOException("failed to read config");
 222                         if (!read_data(br))
 223                                 throw new IOException("failed to read data");
 224                 } else {
 225                         if (!read_old_config(br))
 226                                 throw new IOException("failed to read old config");
 227                         if (!read_old_data(br))
 228                                 throw new IOException("failed to read old data");
 229                 }
 230         }
 231
 232         /*
 233          * Public APIs for I/O
 234          */
 235         public void write(Writer w) throws IOException {
 236                 write_config(w);
 237                 write_data(w);
 238         }
 239
 240         public String toString() {
 241                 try {
 242                         Writer  w = new StringWriter();
 243
 244                         write(w);
 245                         return w.toString();
 246                 } catch (Exception e) {
 247                         return null;
 248                 }
 249         }
 250
 251         public void print() throws IOException {
 252                 System.out.printf("%s", toString());
 253         }
 254
 255         /*
 256          * Constructors
 257          */
 258         public AltosEepromNew(Reader r) throws IOException {
 259                 read(r);
 260         }
 261
 262         public AltosEepromNew(String s) throws IOException {
 263                 read(new StringReader(s));
 264         }
 265
 266         public AltosEepromNew(AltosJson config, ArrayList<Byte> data) {
 267                 this.config = config;
 268                 this.data = data;
 269         }
 270
 271         public AltosEepromNew(AltosConfigData config_data, ArrayList<Byte> data) {
 272                 this.config = new AltosJson(config_data);
 273                 this.data = data;
 274         }
 275
 276         public AltosEepromNew() {
 277         }
 278 }