57 lines
1.5 KiB
Java
57 lines
1.5 KiB
Java
package nodomain.freeyourgadget.gadgetbridge.service.devices.garmin.fit.baseTypes;
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import java.nio.ByteBuffer;
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public class BaseTypeShort implements BaseTypeInterface {
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private final int min;
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private final int max;
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private final int invalid;
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private final boolean unsigned;
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private final int size = 2;
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BaseTypeShort(boolean unsigned, int invalid) {
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if (unsigned) {
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this.min = 0;
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this.max = 0xffff;
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} else {
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this.min = Short.MIN_VALUE;
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this.max = Short.MAX_VALUE;
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}
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this.invalid = invalid;
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this.unsigned = unsigned;
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}
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public int getByteSize() {
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return size;
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}
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@Override
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public Object decode(final ByteBuffer byteBuffer, int scale, int offset) {
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int s = unsigned ? Short.toUnsignedInt(byteBuffer.getShort()) : byteBuffer.getShort();
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if (s < min || s > max)
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return null;
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if (s == invalid)
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return null;
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return (s + offset) / scale;
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}
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@Override
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public void encode(ByteBuffer byteBuffer, Object o, int scale, int offset) {
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if (null == o) {
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invalidate(byteBuffer);
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return;
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}
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int i = ((Number) o).intValue() * scale - offset;
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if (i < min || i > max) {
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invalidate(byteBuffer);
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return;
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}
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byteBuffer.putShort((short) i);
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}
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@Override
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public void invalidate(ByteBuffer byteBuffer) {
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byteBuffer.putShort((short) invalid);
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}
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}
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