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| author | Evgeny S Maksimov <me@vragam.net> | 2019-01-25 23:23:24 +0300 |
|---|---|---|
| committer | Evgeny S Maksimov <me@vragam.net> | 2019-01-25 23:23:24 +0300 |
| commit | 95285d6f8c93d4a9c8e03d634b0a503695fe4449 (patch) | |
| tree | 81706de9111d982c8723b7ad6af9fe4447030297 /src | |
| parent | 5cb6d4bc0f2254379391a44cd7d56fb9b85e353e (diff) | |
| download | trackermap-server-95285d6f8c93d4a9c8e03d634b0a503695fe4449.tar.gz trackermap-server-95285d6f8c93d4a9c8e03d634b0a503695fe4449.tar.bz2 trackermap-server-95285d6f8c93d4a9c8e03d634b0a503695fe4449.zip | |
Bit field traversing refactoring
Diffstat (limited to 'src')
| -rw-r--r-- | src/org/traccar/protocol/NavisProtocolDecoder.java | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/org/traccar/protocol/NavisProtocolDecoder.java b/src/org/traccar/protocol/NavisProtocolDecoder.java index 8eda868b1..65c425053 100644 --- a/src/org/traccar/protocol/NavisProtocolDecoder.java +++ b/src/org/traccar/protocol/NavisProtocolDecoder.java @@ -317,6 +317,12 @@ public class NavisProtocolDecoder extends BaseProtocolDecoder { return positions; } + private boolean checkFlexBitfield(int index) { + int byteIndex = Math.floorDiv(index, 8); + int bitIndex = Math.floorMod(index, 8); + return BitUtil.check(flexBitfield[byteIndex], 7 - bitIndex); + } + private void skipFlexField(int index, ByteBuf buf) { if (index < FLEX_FIELDS_SIZES.length) { buf.skipBytes(FLEX_FIELDS_SIZES[index]); @@ -335,7 +341,7 @@ public class NavisProtocolDecoder extends BaseProtocolDecoder { short output = 0; for (int i = 0; i < flexBitfieldDataSize; i++) { - if ((flexBitfield[(int) (i / 8)] & (0x80 >> i % 8)) == 0) { + if (!checkFlexBitfield(i)) { // Skip FLEX field continue; } @@ -597,7 +603,7 @@ public class NavisProtocolDecoder extends BaseProtocolDecoder { flexDataSize = 0; for (int i = 0; i < flexBitfieldDataSize; i++) { - if ((flexBitfield[(int) (i / 8)] & (0x80 >> i % 8)) != 0) { + if (checkFlexBitfield(i)) { flexDataSize += FLEX_FIELDS_SIZES[i]; } } |