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Code Issues Releases Wiki Activity

Add method for converting from uint24 LE

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This commit is contained in:
Erik Johansson
2018-04-24 23:03:23 +02:00
parent a61a8f8157
commit b9c76a48b4
2 changed files with 16 additions and 0 deletions
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7
android_app/app/src/main/java/com/health/openscale/core/utils/Converters.java
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@@ -143,6 +143,13 @@ public class Converters {
return data; return data;
} }
public static int fromUnsignedInt24Le(byte[] data, int offset) {
int 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) { public static long fromUnsignedInt32Be(byte[] data, int offset) {
long value = (long) (data[offset] & 0xFF) << 24; long value = (long) (data[offset] & 0xFF) << 24;
value += (data[offset + 1] & 0xFF) << 16; value += (data[offset + 1] & 0xFF) << 16;

9
android_app/app/src/test/java/com/health/openscale/ConvertersTest.java
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@@ -102,6 +102,15 @@ public class ConvertersTest {
Converters.toUnsignedInt16Be(0xffff), 0)); Converters.toUnsignedInt16Be(0xffff), 0));
} }
@Test
public void unsignedInt24Converters() throws Exception {
byte[] data = new byte[]{(byte) 0xfd, (byte) 0xfe, (byte) 0xfc, (byte) 0x10, (byte) 0x7f};
assertEquals(0xfcfefd, Converters.fromUnsignedInt24Le(data, 0));
assertEquals(0x10fcfe, Converters.fromUnsignedInt24Le(data, 1));
assertEquals(0x7f10fc, Converters.fromUnsignedInt24Le(data, 2));
}
@Test @Test
public void unsignedInt32Converters() throws Exception { public void unsignedInt32Converters() throws Exception {
byte[] data = new byte[]{(byte) 0xf1, (byte) 0xf2, (byte) 0xf3, (byte) 0x7f, (byte) 0x7e}; byte[] data = new byte[]{(byte) 0xf1, (byte) 0xf2, (byte) 0xf3, (byte) 0x7f, (byte) 0x7e};