List of usage examples for java.io DataInputStream readByte
public final byte readByte() throws IOException
readByte method of DataInput. From source file:org.apache.hadoop.hdfs.qjournal.client.URLLogInputStream.java
/** * Read the header of fsedit log/* w w w . j a v a 2 s .c o m*/ * @param in fsedit stream * @return the edit log version number * @throws IOException if error occurs */ static int readLogVersion(DataInputStream in) throws IOException, LogHeaderCorruptException { int logVersion = 0; // Read log file version. Could be missing. in.mark(4); // If edits log is greater than 2G, available method will return negative // numbers, so we avoid having to call available boolean available = true; try { logVersion = in.readByte(); } catch (EOFException e) { available = false; } if (available) { in.reset(); logVersion = in.readInt(); if (logVersion < FSConstants.LAYOUT_VERSION) { // future version throw new LogHeaderCorruptException("Unexpected version of the file system log file: " + logVersion + ". Current version = " + FSConstants.LAYOUT_VERSION + "."); } } return logVersion; }
From source file:ubic.gemma.core.loader.expression.arrayDesign.AffyChipTypeExtractor.java
/** * @return A UNICODE string. A string object is stored as an INT (to store the string length) followed by the WCHAR * array/*from w w w . j av a2s.com*/ * (to store the string contents). * (http://media.affymetrix.com/support/developer/powertools/changelog/gcos-agcc/generic.html) */ private static String readUnicodeString(DataInputStream str) throws IOException { int fieldLength = readIntBigEndian(str); // log.info( fieldLength ); byte[] buf = new byte[fieldLength * 2]; // StringBuilder buf = new StringBuilder(); for (int i = 0; i < fieldLength * 2; i++) { buf[i] = str.readByte(); } return new String(buf, "UTF-16"); }
From source file:tor.TorCrypto.java
/** * Parses a public key encoded as ASN.1//ww w . j a v a2 s . c o m * * @param rsapublickey ASN.1 Encoded public key * @return PublicKey */ public static PublicKey asn1GetPublicKey(byte[] rsapublickey) { int blobsize = rsapublickey.length; DataInputStream dis = null; int jint = 0; // int to represent unsigned byte or unsigned short int datacount = 0; try { // --- Try to read the ANS.1 encoded RSAPublicKey blob ------------- ByteArrayInputStream bis = new ByteArrayInputStream(rsapublickey); dis = new DataInputStream(bis); if (dis.readByte() != 0x30) // asn.1 encoded starts with 0x30 return null; jint = dis.readUnsignedByte(); // asn.1 is 0x80 plus number of bytes // representing data count if (jint == 0x81) datacount = dis.readUnsignedByte(); // datalength is specified // in next byte. else if (jint == 0x82) // bytes count for any supported keysize // would be at most 2 bytes datacount = dis.readUnsignedShort(); // datalength is specified // in next 2 bytes else return null; // all supported publickey byte-sizes can be // specified in at most 2 bytes if ((jint - 0x80 + 2 + datacount) != blobsize) // sanity check for // correct number of // remaining bytes return null; // System.out // .println("\nRead outer sequence bytes; validated outer asn.1 consistency "); // ------- Next attempt to read Integer sequence for modulus ------ if (dis.readUnsignedByte() != 0x02) // next byte read must be // Integer asn.1 specifier return null; jint = dis.readUnsignedByte(); // asn.1 is 0x80 plus number of bytes // representing data count if (jint == 0x81) datacount = dis.readUnsignedByte(); // datalength is specified // in next byte. else if (jint == 0x82) // bytes count for any supported keysize // would be at most 2 bytes datacount = dis.readUnsignedShort(); // datalength is specified // in next 2 bytes else return null; // all supported publickey modulus byte-sizes can // be specified in at most 2 bytes // ---- next bytes are big-endian ordered modulus ----- byte[] modulus = new byte[datacount]; int modbytes = dis.read(modulus); if (modbytes != datacount) // if we can read enought modulus bytes // ... return null; //System.out.println("Read modulus"); // ------- Next attempt to read Integer sequence for public exponent // ------ if (dis.readUnsignedByte() != 0x02) // next byte read must be // Integer asn.1 specifier return null; datacount = dis.readUnsignedByte(); // size of modulus is specified // in one byte byte[] exponent = new byte[datacount]; int expbytes = dis.read(exponent); if (expbytes != datacount) return null; //System.out.println("Read exponent"); // ----- Finally, create the PublicKey object from modulus and // public exponent -------- RSAPublicKeySpec pubKeySpec = new RSAPublicKeySpec(new BigInteger(1, modulus), new BigInteger(1, exponent)); KeyFactory keyFactory = KeyFactory.getInstance("RSA"); PublicKey pubKey = keyFactory.generatePublic(pubKeySpec); return pubKey; } catch (Exception exc) { return null; } finally { try { dis.close(); } catch (Exception exc) { /* ignore */ ; } } }
From source file:r.base.Connections.java
public static byte[] decompress3(byte buffer[]) throws IOException, DataFormatException { DataInputStream in = new DataInputStream(new ByteArrayInputStream(buffer)); int outlen = in.readInt(); byte type = in.readByte(); if (type == 'Z') { byte[] properties = Arrays.copyOfRange(buffer, 5, 10); ByteArrayInputStream bais = new ByteArrayInputStream(buffer, 10, buffer.length - 5); ByteArrayOutputStream baos = new ByteArrayOutputStream(outlen); LzmaDecoder decoder = new LzmaDecoder(); decoder.SetDecoderProperties(properties); if (!decoder.Code(bais, baos, outlen)) { throw new IOException("LZMA decompression error"); }/*from w w w. ja v a2 s . c om*/ return baos.toByteArray(); } throw new EvalException("decompres3: type = " + (char) type); // // if (type == 'Z') { // lzma_stream strm = LZMA_STREAM_INIT; // lzma_ret ret; // init_filters(); // ret = lzma_raw_decoder(&strm, filters); // if (ret != LZMA_OK) error("internal error %d in R_decompress3", ret); // strm.next_in = p + 5; // strm.avail_in = inlen - 5; // strm.next_out = buf; // strm.avail_out = outlen; // ret = lzma_code(&strm, LZMA_RUN); // if (ret != LZMA_OK && (strm.avail_in > 0)) // error("internal error %d in R_decompress3 %d", // ret, strm.avail_in); // lzma_end(&strm); // } else if (type == '2') { // int res; // res = BZ2_bzBuffToBuffDecompress((char *)buf, &outlen, // (char *)(p + 5), inlen - 5, 0, 0); // if(res != BZ_OK) error("internal error %d in R_decompress2", res); // } else if (type == '1') { // uLong outl; int res; // res = uncompress(buf, &outl, (Bytef *)(p + 5), inlen - 5); // if(res != Z_OK) error("internal error %d in R_decompress1"); // } else if (type == '0') { // buf = p + 5; // } else error("unknown type in R_decompress3"); // }
From source file:RealFunctionValidation.java
public static Object readAndWritePrimitiveValue(final DataInputStream in, final DataOutputStream out, final Class<?> type) throws IOException { if (!type.isPrimitive()) { throw new IllegalArgumentException("type must be primitive"); }/*from www.j a v a 2s. c o m*/ if (type.equals(Boolean.TYPE)) { final boolean x = in.readBoolean(); out.writeBoolean(x); return Boolean.valueOf(x); } else if (type.equals(Byte.TYPE)) { final byte x = in.readByte(); out.writeByte(x); return Byte.valueOf(x); } else if (type.equals(Character.TYPE)) { final char x = in.readChar(); out.writeChar(x); return Character.valueOf(x); } else if (type.equals(Double.TYPE)) { final double x = in.readDouble(); out.writeDouble(x); return Double.valueOf(x); } else if (type.equals(Float.TYPE)) { final float x = in.readFloat(); out.writeFloat(x); return Float.valueOf(x); } else if (type.equals(Integer.TYPE)) { final int x = in.readInt(); out.writeInt(x); return Integer.valueOf(x); } else if (type.equals(Long.TYPE)) { final long x = in.readLong(); out.writeLong(x); return Long.valueOf(x); } else if (type.equals(Short.TYPE)) { final short x = in.readShort(); out.writeShort(x); return Short.valueOf(x); } else { // This should never occur. throw new IllegalStateException(); } }
From source file:ubic.gemma.core.loader.expression.arrayDesign.AffyChipTypeExtractor.java
/** * The data is stored as a int, then the array of bytes. *//*from ww w.j av a2 s .c o m*/ private static byte[] readBytes(DataInputStream str) throws IOException { int fieldLength = readIntBigEndian(str); byte[] result = new byte[fieldLength]; for (int i = 0; i < fieldLength; i++) { if (str.available() == 0) throw new IOException("Reached end of file without string end"); result[i] = str.readByte(); } return result; }
From source file:ubic.gemma.core.loader.expression.arrayDesign.AffyChipTypeExtractor.java
/** * @return A 1 byte character string. A string object is stored as an INT (to store the string length) followed by * the CHAR/* ww w. ja v a 2 s .c om*/ * array (to store the string contents). */ private static String readString(DataInputStream str) throws IOException { int fieldLength = readIntBigEndian(str); StringBuilder buf = new StringBuilder(); for (int i = 0; i < fieldLength; i++) { if (str.available() == 0) throw new IOException("Reached end of file without string end"); buf.append(new String(new byte[] { str.readByte() })); } return buf.toString(); }
From source file:ClassFileUtilities.java
/** * Returns the dependencies of the given class. * @return a list of strings representing the used classes. *//*from w w w.j a va2 s . com*/ public static Set getClassDependencies(InputStream is) throws IOException { DataInputStream dis = new DataInputStream(is); if (dis.readInt() != 0xcafebabe) { throw new IOException("Invalid classfile"); } dis.readInt(); int len = dis.readShort(); String[] strs = new String[len]; Set classes = new HashSet(); Set desc = new HashSet(); for (int i = 1; i < len; i++) { int constCode = dis.readByte() & 0xff; switch (constCode) { case CONSTANT_LONG_INFO: case CONSTANT_DOUBLE_INFO: dis.readLong(); i++; break; case CONSTANT_FIELDREF_INFO: case CONSTANT_METHODREF_INFO: case CONSTANT_INTERFACEMETHODREF_INFO: case CONSTANT_INTEGER_INFO: case CONSTANT_FLOAT_INFO: dis.readInt(); break; case CONSTANT_CLASS_INFO: classes.add(new Integer(dis.readShort() & 0xffff)); break; case CONSTANT_STRING_INFO: dis.readShort(); break; case CONSTANT_NAMEANDTYPE_INFO: dis.readShort(); desc.add(new Integer(dis.readShort() & 0xffff)); break; case CONSTANT_UTF8_INFO: strs[i] = dis.readUTF(); break; default: throw new RuntimeException("unexpected data in constant-pool:" + constCode); } } Set result = new HashSet(); Iterator it = classes.iterator(); while (it.hasNext()) { result.add(strs[((Integer) it.next()).intValue()]); } it = desc.iterator(); while (it.hasNext()) { result.addAll(getDescriptorClasses(strs[((Integer) it.next()).intValue()])); } return result; }
From source file:clueweb09.WarcRecord.java
private static String readLineFromInputStream(DataInputStream in) throws IOException { StringBuilder retString = new StringBuilder(); boolean found_cr = false; boolean keepReading = true; try {/* ww w . j ava2s . co m*/ do { char thisChar = 0; byte readByte = in.readByte(); // check to see if it's a multibyte character if ((readByte & MASK_THREE_BYTE_CHAR) == MASK_THREE_BYTE_CHAR) { found_cr = false; // need to read the next 2 bytes if (in.available() < 2) { // treat these all as individual characters retString.append((char) readByte); int numAvailable = in.available(); for (int i = 0; i < numAvailable; i++) { retString.append((char) (in.readByte())); } continue; } byte secondByte = in.readByte(); byte thirdByte = in.readByte(); // ensure the topmost bit is set if (((secondByte & MASK_TOPMOST_BIT) != MASK_TOPMOST_BIT) || ((thirdByte & MASK_TOPMOST_BIT) != MASK_TOPMOST_BIT)) { //treat these as individual characters retString.append((char) readByte); retString.append((char) secondByte); retString.append((char) thirdByte); continue; } int finalVal = (thirdByte & MASK_BOTTOM_FIVE_BITS) + 64 * (secondByte & MASK_BOTTOM_FIVE_BITS) + 4096 * (readByte & MASK_BOTTOM_FOUR_BITS); thisChar = (char) finalVal; } else if ((readByte & MASK_TWO_BYTE_CHAR) == MASK_TWO_BYTE_CHAR) { found_cr = false; // need to read next byte if (in.available() < 1) { // treat this as individual characters retString.append((char) readByte); continue; } byte secondByte = in.readByte(); if ((secondByte & MASK_TOPMOST_BIT) != MASK_TOPMOST_BIT) { retString.append((char) readByte); retString.append((char) secondByte); continue; } int finalVal = (secondByte & MASK_BOTTOM_FIVE_BITS) + 64 * (readByte & MASK_BOTTOM_SIX_BITS); thisChar = (char) finalVal; } else { // interpret it as a single byte thisChar = (char) readByte; } // Look for carriage return; if found set a flag if (thisChar == '\r') { found_cr = true; } if (thisChar == '\n') { // if the linefeed is the next character after the carriage return if (found_cr) { LINE_ENDING = CR_NEWLINE; } else { LINE_ENDING = NEWLINE; } keepReading = false; } else { retString.append(thisChar); } } while (keepReading); } catch (EOFException eofEx) { return null; } if (retString.length() == 0) { return ""; } return retString.toString(); }
From source file:cwru.mjq.WarcRecord.java
private static String readLineFromInputStream(DataInputStream in) throws IOException { StringBuilder retString = new StringBuilder(); boolean found_cr = false; boolean keepReading = true; try {//from w w w. j a va 2 s . c o m do { char thisChar; byte readByte = in.readByte(); // check to see if it's a multibyte character if ((readByte & MASK_THREE_BYTE_CHAR) == MASK_THREE_BYTE_CHAR) { found_cr = false; // need to read the next 2 bytes if (in.available() < 2) { // treat these all as individual characters retString.append((char) readByte); int numAvailable = in.available(); for (int i = 0; i < numAvailable; i++) { retString.append((char) (in.readByte())); } continue; } byte secondByte = in.readByte(); byte thirdByte = in.readByte(); // ensure the topmost bit is set if (((secondByte & MASK_TOPMOST_BIT) != MASK_TOPMOST_BIT) || ((thirdByte & MASK_TOPMOST_BIT) != MASK_TOPMOST_BIT)) { // treat these as individual characters retString.append((char) readByte); retString.append((char) secondByte); retString.append((char) thirdByte); continue; } int finalVal = (thirdByte & MASK_BOTTOM_FIVE_BITS) + 64 * (secondByte & MASK_BOTTOM_FIVE_BITS) + 4096 * (readByte & MASK_BOTTOM_FOUR_BITS); thisChar = (char) finalVal; } else if ((readByte & MASK_TWO_BYTE_CHAR) == MASK_TWO_BYTE_CHAR) { found_cr = false; // need to read next byte if (in.available() < 1) { // treat this as individual characters retString.append((char) readByte); continue; } byte secondByte = in.readByte(); if ((secondByte & MASK_TOPMOST_BIT) != MASK_TOPMOST_BIT) { retString.append((char) readByte); retString.append((char) secondByte); continue; } int finalVal = (secondByte & MASK_BOTTOM_FIVE_BITS) + 64 * (readByte & MASK_BOTTOM_SIX_BITS); thisChar = (char) finalVal; } else { // interpret it as a single byte thisChar = (char) readByte; } // Look for carriage return; if found set a flag if (thisChar == '\r') { found_cr = true; } if (thisChar == '\n') { // if the linefeed is the next character after the carriage // return if (found_cr) { LINE_ENDING = CR_NEWLINE; } else { LINE_ENDING = NEWLINE; } keepReading = false; } else { retString.append(thisChar); } } while (keepReading); } catch (EOFException eofEx) { return null; } if (retString.length() == 0) { return ""; } return retString.toString(); }