List of usage examples for java.io DataInputStream readUnsignedShort
public final int readUnsignedShort() throws IOException
readUnsignedShort method of DataInput. From source file:Main.java
public static void main(String[] args) throws IOException { short[] s = { -5, 32767 }; FileOutputStream fos = new FileOutputStream("c:\\test.txt"); DataOutputStream dos = new DataOutputStream(fos); for (short j : s) { dos.writeShort(j);/*w w w . ja v a 2 s . c o m*/ } dos.flush(); InputStream is = new FileInputStream("c:\\test.txt"); DataInputStream dis = new DataInputStream(is); while (dis.available() > 0) { int k = dis.readUnsignedShort(); System.out.print(k); } }
From source file:Main.java
public static void main(String[] args) throws IOException { DataInputStream in = new DataInputStream(new FileInputStream("Main.class")); int start = in.readInt(); if (start != 0xcafebabe) { System.out.println("not valid"); }//from w ww .j ava2 s . c o m in.close(); System.out.println(in.readUnsignedShort() + "/" + in.readUnsignedShort()); }
From source file:com.igormaznitsa.jhexed.swing.editor.filecontainer.FileContainer.java
private List<FileContainerSection> loadFromStream(final InputStream in) throws IOException { final DataInputStream din = in instanceof DataInputStream ? (DataInputStream) in : new DataInputStream(in); if (din.readInt() != MAGIC) { throw new IOException("Wrong format, can't find magic"); }//from w ww. j a v a 2 s. c om final int version = din.readShort() & 0xFFFF; if (version > FORMAT_VERSION) { throw new IllegalArgumentException("Detected unsupported version [" + version + ']'); } final int sectionNumber = din.readUnsignedShort(); final List<FileContainerSection> result = new ArrayList<FileContainerSection>(Math.max(5, sectionNumber)); for (int i = 0; i < sectionNumber; i++) { final FileContainerSection s = new FileContainerSection(in); result.add(s); } if (din.readInt() != MAGIC) { throw new IOException("Can't detecte the end MAGIC"); } return result; }
From source file:com.ocpsoft.pretty.faces.config.annotation.ByteCodeAnnotationFilter.java
/** * <p>/* w w w. ja v a 2 s . co m*/ * Checks whether that supplied {@link InputStream} contains a Java class * file that might contain PrettyFaces annotations. * </p> * <p> * The caller of this method is responsible to close the supplied * {@link InputStream}. This method won't do it! * </p> * * @param classFileStream * The stream to read the class file from. * @return <code>true</code> for files that should be further checked for * annotations * @throws IOException * for any kind of IO problem */ @SuppressWarnings("unused") public boolean accept(InputStream classFileStream) throws IOException { // open a DataInputStream DataInputStream in = new DataInputStream(classFileStream); // read magic and abort if it doesn't match int magic = in.readInt(); if (magic != CLASS_FILE_MAGIC) { if (log.isDebugEnabled()) { log.debug("Magic not found! Not a valid class file!"); } return false; } // check for at least JDK 1.5 int minor = in.readUnsignedShort(); int major = in.readUnsignedShort(); if (major < 49) { // JDK 1.4 or less if (log.isTraceEnabled()) { log.trace("Not a JDK5 class! It cannot contain annotations!"); } return false; } // this values is equal to the number entries in the constants pool + 1 int constantPoolEntries = in.readUnsignedShort() - 1; // loop over all entries in the constants pool for (int i = 0; i < constantPoolEntries; i++) { // the tag to identify the record type int tag = in.readUnsignedByte(); // process record according to its type switch (tag) { case CONSTANT_Class: /* * CONSTANT_Class_info { * u1 tag; * u2 name_index; * } */ in.readUnsignedShort(); break; case CONSTANT_Fieldref: case CONSTANT_Methodref: case CONSTANT_InterfaceMethodref: /* * CONSTANT_[Fieldref|Methodref|InterfaceMethodref]_info { * u1 tag; * u2 class_index; * u2 name_and_type_index; * } */ in.readUnsignedShort(); in.readUnsignedShort(); break; case CONSTANT_String: /* * CONSTANT_String_info { * u1 tag; * u2 string_index; * } */ in.readUnsignedShort(); break; case CONSTANT_Integer: case CONSTANT_Float: /* * CONSTANT_[Integer|Float]_info { * u1 tag; * u4 bytes; * } */ in.readInt(); break; case CONSTANT_Long: case CONSTANT_Double: /* * CONSTANT_Long_info { * u1 tag; * u4 high_bytes; * u4 low_bytes; * } */ in.readLong(); /* * We must increase the constant pool index because this tag * type takes two entries */ i++; break; case CONSTANT_NameAndType: /* * CONSTANT_NameAndType_info { * u1 tag; * u2 name_index; * u2 descriptor_index; * } */ in.readUnsignedShort(); in.readUnsignedShort(); break; case CONSTANT_Utf8: /* * CONSTANT_Utf8_info { * u1 tag; * u2 length; * u1 bytes[length]; * } */ String str = in.readUTF(); // check if this string sounds interesting if (str.contains(SEARCH_STRING)) { if (log.isTraceEnabled()) { log.trace("Found PrettyFaces annotation reference in constant pool: " + str); } return true; } break; default: /* * Unknown tag! Should not happen! We will scan the class in this case. */ if (log.isDebugEnabled()) { log.debug("Unknown constant pool tag found: " + tag); } return true; } } /* * We are finished with reading the interesting parts of the class file. * We stop here because the file doesn't seem to be interesting. */ if (log.isTraceEnabled()) { log.trace("No reference to PrettyFaces annotations found!"); } return false; }
From source file:org.tacografo.file.FileBlockTGD.java
/** * Lectura de los bloques con formato :tag(fid)-longitud-value * //ww w . j a v a2 s . c o m * @param entrada * @throws IOException * @throws ErrorFile ocurrido cuando no es un fichero tgd o falla en la lectura de algun bloque * porque no encuentre el tag(fid) */ private void lectura_bloque(DataInputStream entrada) throws IOException, ErrorFile { boolean existe_fid = true; while (existe_fid) { // la lectura tiene que ser con readUnsignedShort debido a que // los fid c108 y c100 // los detecta con signo y me los rellenas como ffffc108 y // ffffc100 int fid = entrada.readUnsignedShort(); existe_fid = this.existe_Fid(fid); if (existe_fid) { // tipo de archivo 0 = bloque de dato -- 1 = certificado byte tipo = entrada.readByte(); Integer longitud = Integer.valueOf(entrada.readChar()); byte[] datos = new byte[longitud]; entrada.read(datos, 0, longitud); // tipo de bloque if (tipo == 0) { CardBlock block = FactoriaBloques.getFactoria(fid, datos); if (block != null) { this.lista_bloque.put(block.getFID(), block); } } } else { throw new ErrorFile(); } } }
From source file:gov.nih.nci.ncicb.tcga.dcc.common.util.ClassVersionChecker.java
private void checkClassVersion(String filename) throws IOException { DataInputStream in = null; try {//w w w.j a v a 2 s. c o m //noinspection IOResourceOpenedButNotSafelyClosed in = new DataInputStream(new FileInputStream(filename)); int magic = in.readInt(); // The first 4 bytes are a magic number, 0xCAFEBABe, to identify a valid class file // then the next 2 bytes identify the class format version (major and minor). // Possible major/minor value : // // major minor Java platform version // 45 3 1.0 // 45 3 1.1 // 46 0 1.2 // 47 0 1.3 // 48 0 1.4 // 49 0 1.5 // 50 0 1.6 if (magic != 0xcafebabe) LOGGER.info(filename + " is not a valid class!"); int minor = in.readUnsignedShort(); int major = in.readUnsignedShort(); LOGGER.info(filename + ": " + major + " . " + minor); } finally { IOUtils.closeQuietly(in); } }
From source file:com.ning.arecibo.util.timeline.times.TimelineCoderImpl.java
@Override public int countTimeBytesSamples(final byte[] timeBytes) { int count = 0; try {//from w w w.j a v a 2 s .c o m final ByteArrayInputStream byteStream = new ByteArrayInputStream(timeBytes); final DataInputStream byteDataStream = new DataInputStream(byteStream); int opcode; while ((opcode = byteDataStream.read()) != -1) { if (opcode == TimelineOpcode.FULL_TIME.getOpcodeIndex()) { byteDataStream.readInt(); count++; } else if (opcode <= TimelineOpcode.MAX_DELTA_TIME) { count++; } else if (opcode == TimelineOpcode.REPEATED_DELTA_TIME_BYTE.getOpcodeIndex()) { count += byteDataStream.read(); byteDataStream.read(); } else if (opcode == TimelineOpcode.REPEATED_DELTA_TIME_SHORT.getOpcodeIndex()) { count += byteDataStream.readUnsignedShort(); byteDataStream.read(); } else { throw new IllegalStateException(String .format("In TimelineCoder.countTimeBytesSamples(), unrecognized opcode %d", opcode)); } } return count; } catch (IOException e) { log.error(e, "IOException while counting timeline samples"); return count; } }
From source file:net.minecraftforge.fml.repackage.com.nothome.delta.GDiffPatcher.java
/** * Patches to an output stream.//from w w w .j a v a 2 s . co m */ public void patch(SeekableSource source, InputStream patch, OutputStream out) throws IOException { DataOutputStream outOS = new DataOutputStream(out); DataInputStream patchIS = new DataInputStream(patch); // the magic string is 'd1 ff d1 ff' + the version number if (patchIS.readUnsignedByte() != 0xd1 || patchIS.readUnsignedByte() != 0xff || patchIS.readUnsignedByte() != 0xd1 || patchIS.readUnsignedByte() != 0xff || patchIS.readUnsignedByte() != 0x04) { throw new PatchException("magic string not found, aborting!"); } while (true) { int command = patchIS.readUnsignedByte(); if (command == EOF) break; int length; int offset; if (command <= DATA_MAX) { append(command, patchIS, outOS); continue; } switch (command) { case DATA_USHORT: // ushort, n bytes following; append length = patchIS.readUnsignedShort(); append(length, patchIS, outOS); break; case DATA_INT: // int, n bytes following; append length = patchIS.readInt(); append(length, patchIS, outOS); break; case COPY_USHORT_UBYTE: offset = patchIS.readUnsignedShort(); length = patchIS.readUnsignedByte(); copy(offset, length, source, outOS); break; case COPY_USHORT_USHORT: offset = patchIS.readUnsignedShort(); length = patchIS.readUnsignedShort(); copy(offset, length, source, outOS); break; case COPY_USHORT_INT: offset = patchIS.readUnsignedShort(); length = patchIS.readInt(); copy(offset, length, source, outOS); break; case COPY_INT_UBYTE: offset = patchIS.readInt(); length = patchIS.readUnsignedByte(); copy(offset, length, source, outOS); break; case COPY_INT_USHORT: offset = patchIS.readInt(); length = patchIS.readUnsignedShort(); copy(offset, length, source, outOS); break; case COPY_INT_INT: offset = patchIS.readInt(); length = patchIS.readInt(); copy(offset, length, source, outOS); break; case COPY_LONG_INT: long loffset = patchIS.readLong(); length = patchIS.readInt(); copy(loffset, length, source, outOS); break; default: throw new IllegalStateException("command " + command); } } outOS.flush(); }
From source file:com.ning.arecibo.util.timeline.times.TimelineCoderImpl.java
@Override public List<DateTime> decompressDateTimes(final byte[] compressedTimes) { final List<DateTime> dateTimeList = new ArrayList<DateTime>(compressedTimes.length * 4); final ByteArrayInputStream byteStream = new ByteArrayInputStream(compressedTimes); final DataInputStream byteDataStream = new DataInputStream(byteStream); int opcode = 0; int lastTime = 0; try {/* ww w . j a v a2 s .c om*/ while (true) { opcode = byteDataStream.read(); if (opcode == -1) { break; } if (opcode == TimelineOpcode.FULL_TIME.getOpcodeIndex()) { lastTime = byteDataStream.readInt(); dateTimeList.add(DateTimeUtils.dateTimeFromUnixSeconds(lastTime)); } else if (opcode == TimelineOpcode.REPEATED_DELTA_TIME_BYTE.getOpcodeIndex()) { final int repeatCount = byteDataStream.readUnsignedByte(); final int delta = byteDataStream.readUnsignedByte(); for (int i = 0; i < repeatCount; i++) { lastTime = lastTime + delta; dateTimeList.add(DateTimeUtils.dateTimeFromUnixSeconds(lastTime)); } } else if (opcode == TimelineOpcode.REPEATED_DELTA_TIME_SHORT.getOpcodeIndex()) { final int repeatCount = byteDataStream.readUnsignedShort(); final int delta = byteDataStream.readUnsignedByte(); for (int i = 0; i < repeatCount; i++) { lastTime = lastTime + delta; dateTimeList.add(DateTimeUtils.dateTimeFromUnixSeconds(lastTime)); } } else { // The opcode is itself a singleton delta lastTime = lastTime + opcode; dateTimeList.add(DateTimeUtils.dateTimeFromUnixSeconds(lastTime)); } } } catch (IOException e) { log.error(e, "In decompressTimes(), exception decompressing"); } return dateTimeList; }
From source file:com.ning.arecibo.util.timeline.times.TimelineCoderImpl.java
private byte[] combineTimelines(final List<byte[]> timesList) { final ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); final DataOutputStream dataStream = new DataOutputStream(outputStream); try {// w ww. j a va2 s .co m int lastTime = 0; int lastDelta = 0; int repeatCount = 0; int chunkCounter = 0; for (byte[] times : timesList) { final ByteArrayInputStream byteStream = new ByteArrayInputStream(times); final DataInputStream byteDataStream = new DataInputStream(byteStream); int byteCursor = 0; while (true) { // Part 1: Get the opcode, and come up with newTime, newCount and newDelta final int opcode = byteDataStream.read(); if (opcode == -1) { break; } byteCursor++; int newTime = 0; int newCount = 0; int newDelta = 0; boolean useNewDelta = false; boolean nonDeltaTime = false; if (opcode == TimelineOpcode.FULL_TIME.getOpcodeIndex()) { newTime = byteDataStream.readInt(); if (newTime < lastTime) { log.warn( "In TimelineCoder.combineTimeLines(), the fulltime read is %d, but the lastTime is %d; setting newTime to lastTime", newTime, lastTime); newTime = lastTime; } byteCursor += 4; if (lastTime == 0) { writeTime(0, newTime, dataStream); lastTime = newTime; lastDelta = 0; repeatCount = 0; continue; } else if (newTime - lastTime <= TimelineOpcode.MAX_DELTA_TIME) { newDelta = newTime - lastTime; useNewDelta = true; newCount = 1; } else { nonDeltaTime = true; } } else if (opcode <= TimelineOpcode.MAX_DELTA_TIME) { newTime = lastTime + opcode; newDelta = opcode; useNewDelta = true; newCount = 1; } else if (opcode == TimelineOpcode.REPEATED_DELTA_TIME_BYTE.getOpcodeIndex()) { newCount = byteDataStream.read(); newDelta = byteDataStream.read(); useNewDelta = true; byteCursor += 2; if (lastTime != 0) { newTime = lastTime + newDelta * newCount; } else { throw new IllegalStateException(String.format( "In TimelineCoder.combineTimelines, lastTime is 0 byte opcode = %d, byteCursor %d, chunkCounter %d, chunk %s", opcode, byteCursor, chunkCounter, new String(Hex.encodeHex(times)))); } } else if (opcode == TimelineOpcode.REPEATED_DELTA_TIME_SHORT.getOpcodeIndex()) { newCount = byteDataStream.readUnsignedShort(); newDelta = byteDataStream.read(); useNewDelta = true; byteCursor += 3; if (lastTime != 0) { newTime = lastTime + newDelta * newCount; } } else { throw new IllegalStateException(String.format( "In TimelineCoder.combineTimelines, Unrecognized byte opcode = %d, byteCursor %d, chunkCounter %d, chunk %s", opcode, byteCursor, chunkCounter, new String(Hex.encodeHex(times)))); } // Part 2: Combine existing state represented in lastTime, lastDelta and repeatCount with newTime, newCount and newDelta if (lastTime == 0) { log.error("In combineTimelines(), lastTime is 0; byteCursor %d, chunkCounter %d, times %s", byteCursor, chunkCounter, new String(Hex.encodeHex(times))); } else if (repeatCount > 0) { if (lastDelta == newDelta && newCount > 0) { repeatCount += newCount; lastTime = newTime; } else { writeRepeatedDelta(lastDelta, repeatCount, dataStream); if (useNewDelta) { lastDelta = newDelta; repeatCount = newCount; lastTime = newTime; } else { writeTime(lastTime, newTime, dataStream); lastTime = newTime; lastDelta = 0; repeatCount = 0; } } } else if (nonDeltaTime) { writeTime(lastTime, newTime, dataStream); lastTime = newTime; lastDelta = 0; repeatCount = 0; } else if (lastDelta == 0) { lastTime = newTime; repeatCount = newCount; lastDelta = newDelta; } } chunkCounter++; } if (repeatCount > 0) { writeRepeatedDelta(lastDelta, repeatCount, dataStream); } dataStream.flush(); return outputStream.toByteArray(); } catch (Exception e) { log.error(e, "In combineTimesLines(), exception combining timelines"); return new byte[0]; } }