List of usage examples for java.nio ByteOrder LITTLE_ENDIAN
ByteOrder LITTLE_ENDIAN
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From source file:com.woodcomputing.bobbin.format.PESFormat.java
@Override public Design load(File file) { byte[] bytes = null; try (InputStream is = new FileInputStream(file)) { bytes = IOUtils.toByteArray(is); } catch (IOException ex) { log.catching(ex);//w ww. j a va2 s . c o m } ByteBuffer bb = ByteBuffer.wrap(bytes); bb.order(ByteOrder.LITTLE_ENDIAN); Design design = new Design(); log.debug("Magic: {}{}{}{}", (char) bb.get(), (char) bb.get(), (char) bb.get(), (char) bb.get()); int pecStart = bb.getInt(8); log.debug("PEC Start: {}", pecStart); byte colorCount = bb.get(pecStart + 48); log.debug("Color Count: {}", colorCount); int colors[] = new int[colorCount]; for (int i = 0; i < colorCount; i++) { colors[i] = bb.get() & 0xFF; log.debug("Color[{}] = {}", i, colors[i]); } bb.position(pecStart + 532); int x; int y; int colorChanges = 0; PESColor color = pesColorMap.get(colors[colorChanges++]); StitchGroup stitchGroup = new StitchGroup(); stitchGroup.setColor(color.getColor()); while (true) { x = bb.get() & 0xFF; y = bb.get() & 0xFF; if (x == 0xFF && y == 0x00) { log.debug("End of stitches"); break; } if (x == 0xFE && y == 0xB0) { int colorIndex = bb.get() & 0xFF; log.debug("Color change: {}", colorIndex); color = pesColorMap.get(colors[colorChanges++]); stitchGroup = new StitchGroup(); stitchGroup.setColor(color.getColor()); continue; } if ((x & 0x80) > 0) { log.debug("Testing X: {} - X & 0x80: {}", x, x & 0x80); if ((x & 0x20) > 0) { log.debug("Stich type TRIM"); } if ((x & 0x10) > 0) { log.debug("Stich type JUMP"); } x = ((x & 0x0F) << 8) + y; if ((x & 0x800) > 0) { x -= 0x1000; } y = bb.get() & 0xFF; } else if (x >= 0x40) { x -= 0x80; } if ((y & 0x80) > 0) { log.debug("Testing Y: {} - Y & 0x80: {}", y, y & 0x80); if ((y & 0x20) > 0) { log.debug("Stich type TRIM"); } if ((y & 0x10) > 0) { log.debug("Stich type JUMP"); } y = ((y & 0x0F) << 8) + bb.get() & 0xFF; if ((y & 0x800) > 0) { y -= 0x1000; } } else if (y >= 0x40) { y -= 0x80; } // Stitch designStitch = new Stitch(cx, -cy, nx, -ny); // stitchGroup.getStitches().add(designStitch); log.debug("X: {} Y: {}", x, y); } log.debug("Color Changes: {}", colorChanges); return design; }
From source file:cfa.vo.interop.EncodeDoubleArray.java
public static String encodeBase64(double[] data, boolean swapByteOrder) throws IOException { byte[] decodedData = doubleToByte(data); if (swapByteOrder) { ByteBuffer buf = ByteBuffer.wrap(decodedData); buf = buf.order(ByteOrder.LITTLE_ENDIAN); buf.get(decodedData);// w w w. j a v a 2s. co m } Base64 codec = new Base64(); byte[] encodedData = codec.encode(decodedData); String result = new String(encodedData); return result; }
From source file:com.github.cambierr.lorawanpacket.semtech.PushData.java
public PushData(byte[] _randoms, ByteBuffer _raw) throws MalformedPacketException { super(_randoms, PacketType.PUSH_DATA); _raw.order(ByteOrder.LITTLE_ENDIAN); if (_raw.remaining() < 8) { throw new MalformedPacketException("too short"); }/*from w ww . j a v a 2 s . c om*/ gatewayEui = new byte[8]; _raw.get(gatewayEui); byte[] json = new byte[_raw.remaining()]; _raw.get(json); JSONObject jo; try { jo = new JSONObject(new String(json)); } catch (JSONException ex) { throw new MalformedPacketException("malformed json"); } stats = new ArrayList<>(); rxpks = new ArrayList<>(); if (jo.has("rxpk")) { if (!jo.get("rxpk").getClass().equals(JSONArray.class)) { throw new MalformedPacketException("malformed json (rxpk)"); } JSONArray rxpk = jo.getJSONArray("rxpk"); for (int i = 0; i < rxpk.length(); i++) { rxpks.add(new Rxpk(rxpk.getJSONObject(i))); } } if (jo.has("stat")) { if (!jo.get("stat").getClass().equals(JSONArray.class)) { throw new MalformedPacketException("malformed json (stat)"); } JSONArray stat = jo.getJSONArray("stat"); for (int i = 0; i < stat.length(); i++) { stats.add(new Stat(stat.getJSONObject(i))); } } }
From source file:Main.java
public static String largeFileSha1(File file) { InputStream inputStream = null; try {/*from ww w. j av a2 s. c o m*/ MessageDigest gsha1 = MessageDigest.getInstance("SHA1"); MessageDigest sha1 = MessageDigest.getInstance("SHA1"); inputStream = new BufferedInputStream(new FileInputStream(file)); byte[] buffer = new byte[1024]; int nRead = 0; int block = 0; int count = 0; final int BLOCK_SIZE = 4 * 1024 * 1024; while ((nRead = inputStream.read(buffer)) != -1) { count += nRead; sha1.update(buffer, 0, nRead); if (BLOCK_SIZE == count) { gsha1.update(sha1.digest()); sha1 = MessageDigest.getInstance("SHA1"); block++; count = 0; } } if (count != 0) { gsha1.update(sha1.digest()); block++; } byte[] digest = gsha1.digest(); byte[] blockBytes = ByteBuffer.allocate(4).order(ByteOrder.LITTLE_ENDIAN).putInt(block).array(); byte[] result = ByteBuffer.allocate(4 + digest.length).put(blockBytes, 0, blockBytes.length) .put(digest, 0, digest.length).array(); return Base64.encodeToString(result, Base64.URL_SAFE | Base64.NO_WRAP); } catch (Exception e) { e.printStackTrace(); } finally { if (inputStream != null) { try { inputStream.close(); } catch (IOException e) { e.printStackTrace(); } } } return null; }
From source file:org.apache.tajo.tuple.memory.ResizableMemoryBlock.java
public ResizableMemoryBlock(ByteBuf buffer, ResizableLimitSpec limitSpec) { this.buffer = buffer.order(ByteOrder.LITTLE_ENDIAN); this.limitSpec = limitSpec; this.memoryAddress = this.buffer.hasMemoryAddress() ? this.buffer.memoryAddress() : 0; }
From source file:com.woodcomputing.bobbin.format.JEFFormat.java
@Override public Design load(File file) { byte[] bytes = null; try (InputStream is = new FileInputStream(file)) { bytes = IOUtils.toByteArray(is); } catch (IOException ex) { log.catching(ex);//from www .j a va2s .co m } ByteBuffer bb = ByteBuffer.wrap(bytes); bb.order(ByteOrder.LITTLE_ENDIAN); JEF jef = new JEF(); jef.setFirstStitchLocation(bb.getInt(0)); log.debug("First Stitch Location: {}", jef.getFirstStitchLocation()); jef.setThreadChangeCount(bb.getInt(24)); log.debug("Threads Changes: {}", jef.getThreadChangeCount()); jef.setHoop(Hoop.id2Hoop(bb.getInt(32))); log.debug("Hoop: {}", jef.getHoop()); jef.setStitchCount(bb.getInt(28)); log.debug("Stitch Count: {}", jef.getStitchCount()); bb.position(116); JEFColor[] colors = new JEFColor[jef.getThreadChangeCount()]; for (int i = 0; i < jef.getThreadChangeCount(); i++) { colors[i] = jefColorMap.get(bb.getInt()); } jef.setThreadColors(colors); for (int i = 0; i < jef.getThreadChangeCount(); i++) { log.debug("ThreadType{}: {}", i, bb.getInt()); } int dx = 0; int dy = 0; int cx = 0; int cy = 0; int nx = 0; int ny = 0; int change = 1; int stitches = 0; boolean isMove = false; bb.position(jef.getFirstStitchLocation()); JEFColor color = jef.getThreadColors()[change - 1]; Design design = new Design(); StitchGroup stitchGroup = new StitchGroup(); stitchGroup.setColor(color.getRgb()); for (int stitch = 1; stitch < jef.getStitchCount(); stitch++) { dx = bb.get(); dy = bb.get(); if (dx == -128) { switch (dy) { case 1: log.debug("change: {}", bb.position()); change++; color = jef.getThreadColors()[change - 1]; design.getStitchGroups().add(stitchGroup); stitchGroup = new StitchGroup(); stitchGroup.setColor(color.getRgb()); // bb.get(); // bb.get(); continue; case 2: // log.debug("move"); isMove = true; break; case 16: log.debug("last"); isMove = true; break; } } else { nx = cx + dx; ny = cy + dy; if (isMove) { isMove = false; } // } else { // log.debug("stitch"); stitches++; Stitch designStitch = new Stitch(cx, -cy, nx, -ny); stitchGroup.getStitches().add(designStitch); // } cx = nx; cy = ny; } } log.debug("Changes: {} Stitches {} End: {}", change, stitches, bb.position()); return design; }
From source file:org.openhab.binding.ulux.internal.ump.messages.AbstractUluxMessage.java
@Override public final ByteBuffer getBuffer() { final ByteBuffer buffer = ByteBuffer.wrap(new byte[this.length]); buffer.order(ByteOrder.LITTLE_ENDIAN); buffer.put(this.length); buffer.put(this.messageId.toByte()); buffer.putShort(this.actorId); addData(buffer);// w ww. j a v a 2s.c o m buffer.flip(); return buffer; }
From source file:StreamUtility.java
/** * Converts little endian bytes to a long * @param value byte array to read//www . j ava 2 s . co m * @return long value of the byte array */ public static long littleEndianToLong(byte[] value) { return ByteBuffer.wrap(value).order(ByteOrder.LITTLE_ENDIAN).getLong(); }
From source file:Main.java
public static long getCommentLength(final FileChannel fileChannel) throws IOException { // End of central directory record (EOCD) // Offset Bytes Description[23] // 0 4 End of central directory signature = 0x06054b50 // 4 2 Number of this disk // 6 2 Disk where central directory starts // 8 2 Number of central directory records on this disk // 10 2 Total number of central directory records // 12 4 Size of central directory (bytes) // 16 4 Offset of start of central directory, relative to start of archive // 20 2 Comment length (n) // 22 n Comment // For a zip with no archive comment, the // end-of-central-directory record will be 22 bytes long, so // we expect to find the EOCD marker 22 bytes from the end. final long archiveSize = fileChannel.size(); if (archiveSize < ZIP_EOCD_REC_MIN_SIZE) { throw new IOException("APK too small for ZIP End of Central Directory (EOCD) record"); }//from w w w . ja va 2s .com // ZIP End of Central Directory (EOCD) record is located at the very end of the ZIP archive. // The record can be identified by its 4-byte signature/magic which is located at the very // beginning of the record. A complication is that the record is variable-length because of // the comment field. // The algorithm for locating the ZIP EOCD record is as follows. We search backwards from // end of the buffer for the EOCD record signature. Whenever we find a signature, we check // the candidate record's comment length is such that the remainder of the record takes up // exactly the remaining bytes in the buffer. The search is bounded because the maximum // size of the comment field is 65535 bytes because the field is an unsigned 16-bit number. final long maxCommentLength = Math.min(archiveSize - ZIP_EOCD_REC_MIN_SIZE, UINT16_MAX_VALUE); final long eocdWithEmptyCommentStartPosition = archiveSize - ZIP_EOCD_REC_MIN_SIZE; for (int expectedCommentLength = 0; expectedCommentLength <= maxCommentLength; expectedCommentLength++) { final long eocdStartPos = eocdWithEmptyCommentStartPosition - expectedCommentLength; final ByteBuffer byteBuffer = ByteBuffer.allocate(4); fileChannel.position(eocdStartPos); fileChannel.read(byteBuffer); byteBuffer.order(ByteOrder.LITTLE_ENDIAN); if (byteBuffer.getInt(0) == ZIP_EOCD_REC_SIG) { final ByteBuffer commentLengthByteBuffer = ByteBuffer.allocate(2); fileChannel.position(eocdStartPos + ZIP_EOCD_COMMENT_LENGTH_FIELD_OFFSET); fileChannel.read(commentLengthByteBuffer); commentLengthByteBuffer.order(ByteOrder.LITTLE_ENDIAN); final int actualCommentLength = commentLengthByteBuffer.getShort(0); if (actualCommentLength == expectedCommentLength) { return actualCommentLength; } } } throw new IOException("ZIP End of Central Directory (EOCD) record not found"); }
From source file:io.druid.segment.data.CompressedColumnarIntsSerializerTest.java
@Parameterized.Parameters(name = "{index}: compression={0}, byteOrder={1}") public static Iterable<Object[]> compressionStrategiesAndByteOrders() { Set<List<Object>> combinations = Sets.cartesianProduct(Sets.newHashSet(CompressionStrategy.noNoneValues()), Sets.newHashSet(ByteOrder.BIG_ENDIAN, ByteOrder.LITTLE_ENDIAN)); return Iterables.transform(combinations, new Function<List, Object[]>() { @Override/* ww w. j a va 2s . c o m*/ public Object[] apply(List input) { return new Object[] { input.get(0), input.get(1) }; } }); }