Initial project commit

2020-07-18 21:44:27 -04:00
parent 8a1141b373
commit fea891a268
127 changed files with 20838 additions and 0 deletions
--- a/lib/nightscout/com/eveningoutpost/dexdrip/ImportedLibraries/dexcom/PacketBuilder.java
+++ b/lib/nightscout/com/eveningoutpost/dexdrip/ImportedLibraries/dexcom/PacketBuilder.java
@@ -0,0 +1,108 @@
+package com.eveningoutpost.dexdrip.ImportedLibraries.dexcom;
+
+import com.eveningoutpost.dexdrip.Models.UserError.Log;
+
+import java.util.ArrayList;
+import java.util.List;
+
+// This code and this particular library are from the NightScout android uploader
+// Check them out here: https://github.com/nightscout/android-uploader
+// Some of this code may have been modified for use in this project
+
+public class PacketBuilder {
+    public static final int MAX_PAYLOAD = 1584;
+    public static final int MIN_LEN = 6;
+    public static final int MAX_LEN = MAX_PAYLOAD + MIN_LEN;
+    public static final byte SOF = 0x01;
+    public static final int OFFSET_SOF = 0;
+    public static final int OFFSET_LENGTH = 1;
+    public static final int OFFSET_NULL = 2;
+    public static final byte NULL = 0x00;
+    public static final int OFFSET_CMD = 3;
+    public static final int OFFSET_PAYLOAD = 4;
+    public static final int CRC_LEN = 2;
+    public static final int HEADER_LEN = 4;
+    public ArrayList<Byte> packet;
+    public int command;
+    public ArrayList<Byte> payload;
+
+    public PacketBuilder(int command) {
+        this.command = command;
+    }
+
+    public PacketBuilder(int command, ArrayList<Byte> payload) {
+        this.command = command;
+        this.payload = payload;
+    }
+
+    public byte[] compose() {
+        packet = new ArrayList<Byte>();
+        packet.add(OFFSET_SOF, SOF);
+        packet.add(OFFSET_LENGTH, getLength());
+        packet.add(OFFSET_NULL, NULL);
+        packet.add(OFFSET_CMD, (byte) command);
+        if (this.payload != null) { this.packet.addAll(OFFSET_PAYLOAD, this.payload); }
+        byte[] crc16 = CRC16.calculate(toBytes(), 0, this.packet.size());
+        this.packet.add(crc16[0]);
+        this.packet.add(crc16[1]);
+        Log.d("ShareTest", "About to start adding to Byte, size: " + this.packet.size());
+        return this.toBytes();
+    }
+
+    public List<byte[]> composeList() {
+        packet = new ArrayList<Byte>();
+        packet.add(OFFSET_SOF, SOF);
+        packet.add(OFFSET_LENGTH, getLength());
+        packet.add(OFFSET_NULL, NULL);
+        packet.add(OFFSET_CMD, (byte) command);
+        if (this.payload != null) { this.packet.addAll(OFFSET_PAYLOAD, this.payload); }
+        byte[] crc16 = CRC16.calculate(toBytes(), 0, this.packet.size());
+        this.packet.add(crc16[0]);
+        this.packet.add(crc16[1]);
+        Log.d("ShareTest", "About to start adding to ByteList, size: " + this.packet.size());
+        return this.toBytesList();
+    }
+
+    private byte getLength() {
+        int packetSize = payload == null ? MIN_LEN : payload.size() + CRC_LEN + HEADER_LEN;
+
+        if (packetSize > MAX_LEN) {
+            throw new IndexOutOfBoundsException(packetSize + " bytes, but packet must between "
+                    + MIN_LEN + " and " + MAX_LEN + " bytes.");
+        }
+
+        return (byte) packetSize;
+    }
+
+    public byte[] toBytes() {
+        byte[] b = new byte[this.packet.size()];
+        for (int i = 0; i < this.packet.size(); i++) {
+            b[i] = this.packet.get(i).byteValue();
+        }
+        return b;
+    }
+
+    public List<byte[]> toBytesList() {
+        List<byte[]> byteMessages = new ArrayList<byte[]>();
+        double totalPacketSize = packet.size();
+        int messages =(int) Math.ceil(totalPacketSize/18);
+        for(int m = 0; m < messages; m++) {
+            int thisPacketSize;
+            if (m == messages - 1) {
+                thisPacketSize = ((this.packet.size()+2) % 18);
+            } else {
+                thisPacketSize = (20);
+            }
+            int offset = m * 18;
+            Log.d("ShareTest", "This packet size: " + thisPacketSize);
+            byte[] b = new byte[thisPacketSize];
+            b[0] = (byte) (m + 1);
+            b[1] = (byte) (messages);
+            for (int i = 2; i < thisPacketSize; i++) {
+                b[i] = packet.get(offset + i - 2).byteValue();
+            }
+            byteMessages.add(b);
+        }
+        return byteMessages;
+    }
+}