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Code Issues Releases Wiki Activity

Add Converters.fromSignedInt* methods.

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This commit is contained in:
Maks Verver
2018-10-13 16:12:31 +02:00
parent d9885b967f
commit 28cee4ea04
5 changed files with 75 additions and 55 deletions
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5
android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothTrisaBodyAnalyze.java
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@@ -33,7 +33,6 @@ import java.util.UUID;
import timber.log.Timber;
import static com.health.openscale.core.bluetooth.lib.TrisaBodyAnalyzeLib.convertJavaTimestampToDevice;
import static com.health.openscale.core.bluetooth.lib.TrisaBodyAnalyzeLib.getInt32;
import static com.health.openscale.core.bluetooth.lib.TrisaBodyAnalyzeLib.parseScaleMeasurementData;
/**
@@ -219,7 +218,7 @@ public class BluetoothTrisaBodyAnalyze extends BluetoothCommunication {
Timber.e("Password data too short");
return;
}
password = getInt32(data, 1);
password = Converters.fromSignedInt32Le(data, 1);
if (deviceId == null) {
Timber.e("Can't save password: device id not set!");
} else {
@@ -247,7 +246,7 @@ public class BluetoothTrisaBodyAnalyze extends BluetoothCommunication {
disconnect(true);
return;
}
int challenge = getInt32(data, 1);
int challenge = Converters.fromSignedInt32Le(data, 1);
int response = challenge ^ password;
writeCommand(DOWNLOAD_INFORMATION_RESULT_COMMAND, response);
int deviceTimestamp = convertJavaTimestampToDevice(System.currentTimeMillis());

12
android_app/app/src/main/java/com/health/openscale/core/bluetooth/lib/TrisaBodyAnalyzeLib.java
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@@ -33,16 +33,6 @@ public class TrisaBodyAnalyzeLib {
// Timestamp of 2010-01-01 00:00:00 UTC (or local time?)
private static final long TIMESTAMP_OFFSET_SECONDS = 1262304000L;
/**
* Converts 4 little-endian bytes to a 32-bit integer, starting from {@code offset}.
*
* @throws IndexOutOfBoundsException if {@code offset < 0} or {@code offset + 4> data.length}
*/
public static int getInt32(byte[] data, int offset) {
return (data[offset] & 0xff) | ((data[offset + 1] & 0xff) << 8) |
((data[offset + 2] & 0xff) << 16) | ((data[offset + 3] & 0xff) << 24);
}
/** Converts 4 bytes to a floating point number, starting from {@code offset}.
*
* <p>The first three little-endian bytes form the 24-bit mantissa. The last byte contains the
@@ -92,7 +82,7 @@ public class TrisaBodyAnalyzeLib {
return null;
}
double weightKg = getBase10Float(data, 1);
int deviceTimestamp = getInt32(data, 5);
int deviceTimestamp = Converters.fromSignedInt32Le(data, 5);
ScaleMeasurement measurement = new ScaleMeasurement();
measurement.setDateTime(new Date(convertDeviceTimestampToJava(deviceTimestamp)));

40
android_app/app/src/main/java/com/health/openscale/core/utils/Converters.java
View File

@@ -235,18 +235,26 @@ public class Converters {
return kg;
}
public static int fromUnsignedInt16Le(byte[] data, int offset) {
int value = (data[offset + 1] & 0xFF) << 8;
public static int fromSignedInt16Le(byte[] data, int offset) {
int value = data[offset + 1] << 8;
value += data[offset] & 0xFF;
return value;
}
public static int fromUnsignedInt16Be(byte[] data, int offset) {
int value = (data[offset] & 0xFF) << 8;
public static int fromSignedInt16Be(byte[] data, int offset) {
int value = data[offset] << 8;
value += data[offset + 1] & 0xFF;
return value;
}
public static int fromUnsignedInt16Le(byte[] data, int offset) {
return fromSignedInt16Le(data, offset) & 0xFFFF;
}
public static int fromUnsignedInt16Be(byte[] data, int offset) {
return fromSignedInt16Be(data, offset) & 0xFFFF;
}
public static void toInt16Le(byte[] data, int offset, int value) {
data[offset + 0] = (byte) (value & 0xFF);
data[offset + 1] = (byte) ((value >> 8) & 0xFF);
@@ -269,29 +277,41 @@ public class Converters {
return data;
}
public static int fromUnsignedInt24Le(byte[] data, int offset) {
int value = (data[offset + 2] & 0xFF) << 16;
public static int fromSignedInt24Le(byte[] data, int offset) {
int value = data[offset + 2] << 16;
value += (data[offset + 1] & 0xFF) << 8;
value += data[offset] & 0xFF;
return value;
}
public static long fromUnsignedInt32Le(byte[] data, int offset) {
long value = (long) (data[offset + 3] & 0xFF) << 24;
public static int fromUnsignedInt24Le(byte[] data, int offset) {
return fromSignedInt24Le(data, offset) & 0xFFFFFF;
}
public static int fromSignedInt32Le(byte[] data, int offset) {
int value = data[offset + 3] << 24;
value += (data[offset + 2] & 0xFF) << 16;
value += (data[offset + 1] & 0xFF) << 8;
value += data[offset] & 0xFF;
return value;
}
public static long fromUnsignedInt32Be(byte[] data, int offset) {
long value = (long) (data[offset] & 0xFF) << 24;
public static int fromSignedInt32Be(byte[] data, int offset) {
int value = data[offset] << 24;
value += (data[offset + 1] & 0xFF) << 16;
value += (data[offset + 2] & 0xFF) << 8;
value += data[offset + 3] & 0xFF;
return value;
}
public static long fromUnsignedInt32Le(byte[] data, int offset) {
return (long) fromSignedInt32Le(data, offset) & 0xFFFFFFFFL;
}
public static long fromUnsignedInt32Be(byte[] data, int offset) {
return (long) fromSignedInt32Be(data, offset) & 0xFFFFFFFFL;
}
public static void toInt32Le(byte[] data, int offset, long value) {
data[offset + 3] = (byte) ((value >> 24) & 0xFF);
data[offset + 2] = (byte) ((value >> 16) & 0xFF);

45
android_app/app/src/test/java/com/health/openscale/ConvertersTest.java
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@@ -84,18 +84,33 @@ public class ConvertersTest {
}
@Test
public void fromUnsignedInt16Converters() throws Exception {
public void fromInt16Converters() throws Exception {
byte[] data = new byte[]{(byte) 0xfd, (byte) 0xfe, (byte) 0xfc, (byte) 0x10, (byte) 0x7f};
assertEquals(0xfffffefd, Converters.fromSignedInt16Le(data, 0));
assertEquals(0xfffffcfe, Converters.fromSignedInt16Le(data, 1));
assertEquals(0x000010fc, Converters.fromSignedInt16Le(data, 2));
assertEquals(0x00007f10, Converters.fromSignedInt16Le(data, 3));
assertEquals(0xfefd, Converters.fromUnsignedInt16Le(data, 0));
assertEquals(0xfcfe, Converters.fromUnsignedInt16Le(data, 1));
assertEquals(0x10fc, Converters.fromUnsignedInt16Le(data, 2));
assertEquals(0x7f10, Converters.fromUnsignedInt16Le(data, 3));
assertEquals(0xfffffdfe, Converters.fromSignedInt16Be(data, 0));
assertEquals(0xfffffefc, Converters.fromSignedInt16Be(data, 1));
assertEquals(0xfffffc10, Converters.fromSignedInt16Be(data, 2));
assertEquals(0x0000107f, Converters.fromSignedInt16Be(data, 3));
assertEquals(0xfdfe, Converters.fromUnsignedInt16Be(data, 0));
assertEquals(0xfefc, Converters.fromUnsignedInt16Be(data, 1));
assertEquals(0xfc10, Converters.fromUnsignedInt16Be(data, 2));
assertEquals(0x107f, Converters.fromUnsignedInt16Be(data, 3));
assertEquals(-12345,
Converters.fromSignedInt16Le(Converters.toInt16Le(-12345), 0));
assertEquals(-12345,
Converters.fromSignedInt16Be(Converters.toInt16Be(-12345), 0));
}
@Test
@@ -113,31 +128,55 @@ public class ConvertersTest {
}
@Test
public void unsignedInt24Converters() throws Exception {
public void fromInt24Converters() throws Exception {
byte[] data = new byte[]{(byte) 0xfd, (byte) 0xfe, (byte) 0xfc, (byte) 0x10, (byte) 0x7f};
assertEquals(0xfffcfefd, Converters.fromSignedInt24Le(data, 0));
assertEquals(0x0010fcfe, Converters.fromSignedInt24Le(data, 1));
assertEquals(0x007f10fc, Converters.fromSignedInt24Le(data, 2));
assertEquals(0xfcfefd, Converters.fromUnsignedInt24Le(data, 0));
assertEquals(0x10fcfe, Converters.fromUnsignedInt24Le(data, 1));
assertEquals(0x7f10fc, Converters.fromUnsignedInt24Le(data, 2));
assertEquals(-1234567,
Converters.fromSignedInt24Le(Converters.toInt32Le(-1234567), 0));
}
@Test
public void fromUnsignedInt32Converters() throws Exception {
public void fromInt32Converters() throws Exception {
byte[] data = new byte[]{(byte) 0xf1, (byte) 0xf2, (byte) 0xf3, (byte) 0x7f, (byte) 0x7e};
assertEquals(0x7ff3f2f1, Converters.fromSignedInt32Le(data, 0));
assertEquals(0x7e7ff3f2, Converters.fromSignedInt32Le(data, 1));
assertEquals(0x7ff3f2f1, Converters.fromUnsignedInt32Le(data, 0));
assertEquals(0x7e7ff3f2, Converters.fromUnsignedInt32Le(data, 1));
assertEquals(0xf1f2f37f, Converters.fromSignedInt32Be(data, 0));
assertEquals(0xf2f37f7e, Converters.fromSignedInt32Be(data, 1));
assertEquals(0xf1f2f37fL, Converters.fromUnsignedInt32Be(data, 0));
assertEquals(0xf2f37f7eL, Converters.fromUnsignedInt32Be(data, 1));
data = new byte[]{(byte) 0x80, (byte) 0x00, (byte) 0x01, (byte) 0xff, (byte) 0x00};
assertEquals(0xff010080, Converters.fromSignedInt32Le(data, 0));
assertEquals(0xff0100, Converters.fromSignedInt32Le(data, 1));
assertEquals(0xff010080L, Converters.fromUnsignedInt32Le(data, 0));
assertEquals(0xff0100, Converters.fromUnsignedInt32Le(data, 1));
assertEquals(0x800001ff, Converters.fromSignedInt32Be(data, 0));
assertEquals(0x1ff00, Converters.fromSignedInt32Be(data, 1));
assertEquals(0x800001ffL, Converters.fromUnsignedInt32Be(data, 0));
assertEquals(0x1ff00L, Converters.fromUnsignedInt32Be(data, 1));
assertEquals(-1234567890,
Converters.fromSignedInt32Le(Converters.toInt32Le(-1234567890), 0));
assertEquals(-1234567890,
Converters.fromSignedInt32Be(Converters.toInt32Be(-1234567890), 0));
}
@Test

28
android_app/app/src/test/java/com/health/openscale/TrisaBodyAnalyzeLibTest.java
View File

@@ -15,27 +15,12 @@ import java.util.GregorianCalendar;
import static com.health.openscale.core.bluetooth.lib.TrisaBodyAnalyzeLib.convertDeviceTimestampToJava;
import static com.health.openscale.core.bluetooth.lib.TrisaBodyAnalyzeLib.convertJavaTimestampToDevice;
import static com.health.openscale.core.bluetooth.lib.TrisaBodyAnalyzeLib.getBase10Float;
import static com.health.openscale.core.bluetooth.lib.TrisaBodyAnalyzeLib.getInt32;
import static com.health.openscale.core.bluetooth.lib.TrisaBodyAnalyzeLib.parseScaleMeasurementData;
import static junit.framework.Assert.assertEquals;
/** Unit tests for {@link com.health.openscale.core.bluetooth.lib.TrisaBodyAnalyzeLib}.*/
public class TrisaBodyAnalyzeLibTest {
@Test
public void getInt32Tests() {
byte[] data = new byte[]{1, 2, 3, 4, 5, 6};
assertEquals(0x04030201, getInt32(data, 0));
assertEquals(0x05040302, getInt32(data, 1));
assertEquals(0x06050403, getInt32(data, 2));
assertEquals(0xa7bdd385, getInt32(new byte[]{-123, -45, -67, -89}, 0));
assertThrows(IndexOutOfBoundsException.class, getInt32Runnable(data, -1));
assertThrows(IndexOutOfBoundsException.class, getInt32Runnable(data, 5));
assertThrows(IndexOutOfBoundsException.class, getInt32Runnable(new byte[]{1,2,3}, 0));
}
@Test
public void getBase10FloatTests() {
double eps = 1e-9; // margin of error for inexact floating point comparisons
@@ -117,19 +102,6 @@ public class TrisaBodyAnalyzeLibTest {
assertEquals(0f, measurement.getFat());
}
/**
* Creates a {@link Runnable} that will call getInt32(). In Java 8, this can be done more
* easily with a lambda expression at the call site, but we are using Java 7.
*/
private static Runnable getInt32Runnable(final byte[] data, final int offset) {
return new Runnable() {
@Override
public void run() {
getInt32(data, offset);
}
};
}
/**
* Creates a {@link Runnable} that will call getBase10Float(). In Java 8, this can be done more
* easily with a lambda expression at the call site, but we are using Java 7.