Java LittleEndian类代码示例

import org.apache.poi.util.LittleEndian; //导入依赖的package包/类
@Test
    public void testGetLong() throws IOException {
        byte[] array = new byte[] { (byte)0x91, (byte)0xE9, 0x1D, (byte)0x98, 0x39, 0x01, 0x00, 0x00 };
        HexDump.dump(array, 0, System.out, 0);

        int offset = 0;
//        System.out.println(((long) (array[offset + 7] & 0xff) << 56));
//        System.out.println(((long) (array[offset + 6] & 0xff) << 48));
//        System.out.println(((long) (array[offset + 5] & 0xff) << 40));
//        System.out.println(((long) (array[offset + 4] & 0xff) << 32));
//        System.out.println(((long) (array[offset + 3] & 0xff) << 24));
//        System.out.println(((long) (array[offset + 2] & 0xff) << 16));
//        System.out.println(((long) (array[offset + 1] & 0xff) << 8));
//        System.out.println(((long) (array[offset + 0] & 0xff) << 0));
        
//        System.out.println(((long) (array[offset + 5] & 0xff) << 40) |
//                ((long) (array[offset + 4] & 0xff) << 32));
        
//        System.out.println(BlockHeader.getLong(array, offset));
        
        assertEquals(1346876860817L, LittleEndian.getLong(array, offset));
    }
 

import org.apache.poi.util.LittleEndian; //导入依赖的package包/类
/**
 * inits this document DOP structure.
 *
 * @param tableStream The documents table stream.
 */
private void initDocProperties(byte[] tableStream)
{
  int pos = LittleEndian.getInt(_header, 0x192);
  int size = LittleEndian.getInt(_header, 0x196);
  byte[] dop = new byte[size];

  System.arraycopy(tableStream, pos, dop, 0, size);

  _docProps._fFacingPages = (dop[0] & 0x1) > 0;
  _docProps._fpc = (dop[0] & 0x60) >> 5;

  short num = LittleEndian.getShort(dop, 2);
  _docProps._rncFtn = (num & 0x3);
  _docProps._nFtn = (short)(num & 0xfffc) >> 2;
  num = LittleEndian.getShort(dop, 52);
  _docProps._rncEdn = num & 0x3;
  _docProps._nEdn = (short)(num & 0xfffc) >> 2;
  num = LittleEndian.getShort(dop, 54);
  _docProps._epc = num & 0x3;
}
 

import org.apache.poi.util.LittleEndian; //导入依赖的package包/类
/**
 * Gets the papx for the pagraph at index in this fkp.
 *
 * @param index The index of the papx to get.
 * @return a papx grpprl.
 */
public byte[] getGrpprl(int index)
{
    int papxOffset = 2 * LittleEndian.getUnsignedByte(_fkp, ((_crun + 1) * 4) + (index * 13));
    int size = 2 * LittleEndian.getUnsignedByte(_fkp, papxOffset);
    if(size == 0)
    {
        size = 2 * LittleEndian.getUnsignedByte(_fkp, ++papxOffset);
    }
    else
    {
        size--;
    }

    byte[] papx = new byte[size];
    System.arraycopy(_fkp, ++papxOffset, papx, 0, size);
    return papx;
}
 

import org.apache.poi.util.LittleEndian; //导入依赖的package包/类
/**
 * Write the contents of the record back, so it can be written
 *  to disk
 */
public void writeOut(OutputStream out) throws IOException {
	// First thing to do is update the raw bytes of the contents, based
	//  on the properties
	updateRawContents();

	// Now ensure that the header size is correct
	int newSize = rawContents.length + reserved.length;
	LittleEndian.putInt(_header,4,newSize);

	// Write out the (new) header
	out.write(_header);

	// Write out the styles
	out.write(rawContents);

	// Write out any extra bits
	out.write(reserved);
}
 

import org.apache.poi.util.LittleEndian; //导入依赖的package包/类
private Type4(String thingType, String bitType, byte[] data) {
	super(thingType, bitType, data);

	// Grab our 4x pre-data
	preData = new int[4];
	preData[0] = LittleEndian.getUShort(data, 8+0);
	preData[1] = LittleEndian.getUShort(data, 8+2);
	preData[2] = LittleEndian.getUShort(data, 8+4);
	preData[3] = LittleEndian.getUShort(data, 8+6);

	// And grab the 4 byte values
	for(int i=0; i<numberOfPLCs; i++) {
		plcValA[i] = LittleEndian.getUInt(data, 16+(8*i));
		plcValB[i] = LittleEndian.getUInt(data, 16+(8*i)+4);
	}
}
 

import org.apache.poi.util.LittleEndian; //导入依赖的package包/类
private Type8(String thingType, String bitType, byte[] data) {
	super(thingType, bitType, data);

	// Grab our 7x pre-data
	preData = new int[7];
	preData[0] = LittleEndian.getUShort(data, 8+0);
	preData[1] = LittleEndian.getUShort(data, 8+2);
	preData[2] = LittleEndian.getUShort(data, 8+4);
	preData[3] = LittleEndian.getUShort(data, 8+6);
	preData[4] = LittleEndian.getUShort(data, 8+8);
	preData[5] = LittleEndian.getUShort(data, 8+10);
	preData[6] = LittleEndian.getUShort(data, 8+12);

	// And grab the 4 byte values
	for(int i=0; i<numberOfPLCs; i++) {
		plcValA[i] = LittleEndian.getUInt(data, 22+(8*i));
		plcValB[i] = LittleEndian.getUInt(data, 22+(8*i)+4);
	}
}
 

import org.apache.poi.util.LittleEndian; //导入依赖的package包/类
public PieceDescriptor(byte[] buf, int offset)
{
  descriptor = LittleEndian.getShort(buf, offset);
  offset += LittleEndian.SHORT_SIZE;
  fc = LittleEndian.getInt(buf, offset);
  offset += LittleEndian.INT_SIZE;
  prm = new PropertyModifier( LittleEndian.getShort(buf, offset));

  // see if this piece uses unicode.
  if ((fc & 0x40000000) == 0)
  {
      unicode = true;
  }
  else
  {
      unicode = false;
      fc &= ~(0x40000000);//gives me FC in doc stream
      fc /= 2;
  }

}
 

import org.apache.poi.util.LittleEndian; //导入依赖的package包/类
/**
 * Decompresses the whole of the compressed RTF
 *  stream, outputting the resulting RTF bytes.
 * Note - will decompress any padding at the end of
 *  the input, if present, use {@link #getDeCompressedSize()}
 *  if you need to know how much of the result is
 *  real. (Padding may be up to 7 bytes).
 */
public void decompress(InputStream src, OutputStream res) throws IOException {
   // Validate the header on the front of the RTF
   compressedSize = LittleEndian.readInt(src);
   decompressedSize = LittleEndian.readInt(src);
   int compressionType = LittleEndian.readInt(src);
   int dataCRC = LittleEndian.readInt(src);
   
   // TODO - Handle CRC checking on the output side
   
   // Do we need to do anything?
   if(compressionType == UNCOMPRESSED_SIGNATURE_INT) {
      // Nope, nothing fancy to do
      IOUtils.copy(src, res);
   } else if(compressionType == COMPRESSED_SIGNATURE_INT) {
      // We need to decompress it below
   } else {
      throw new IllegalArgumentException("Invalid compression signature " + compressionType);
   }

   // Have it processed
   super.decompress(src, res);
}
 

import org.apache.poi.util.LittleEndian; //导入依赖的package包/类
public void serialize( byte[] data, int offset )
{
    LittleEndian.putUShort( data, 0x0 + offset, field_1_wIdent );
    LittleEndian.putUShort( data, 0x2 + offset, field_2_nFib );
    LittleEndian.putUShort( data, 0x4 + offset, field_3_unused );
    LittleEndian.putUShort( data, 0x6 + offset, field_4_lid );
    LittleEndian.putUShort( data, 0x8 + offset, field_5_pnNext );
    LittleEndian.putShort( data, 0xa + offset, field_6_flags1 );
    LittleEndian.putUShort( data, 0xc + offset, field_7_nFibBack );
    LittleEndian.putInt( data, 0xe + offset, field_8_lKey );
    data[ 0x12 + offset ] = field_9_envr;
    data[ 0x13 + offset ] = field_10_flags2;
    LittleEndian.putShort( data, 0x14 + offset, field_11_Chs );
    LittleEndian.putShort( data, 0x16 + offset, field_12_chsTables );
    LittleEndian.putInt( data, 0x18 + offset, field_13_fcMin );
    LittleEndian.putInt( data, 0x1c + offset, field_14_fcMac );
}
 

import org.apache.poi.util.LittleEndian; //导入依赖的package包/类
/**
 * Constructs a single new date attribute from the id, type,
 *  and the contents of the stream
 */
protected TNEFDateAttribute(int id, int type, InputStream inp) throws IOException {
   super(id, type, inp);
   
   byte[] data = getData();
   if(data.length == 8) {
      // The value is a 64 bit Windows Filetime
      this.data = Util.filetimeToDate(
            LittleEndian.getLong(getData(), 0)
      );
   } else if(data.length == 14) {
      // It's the 7 date fields. We think it's in UTC...
      Calendar c = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
      c.set(Calendar.YEAR, LittleEndian.getUShort(data, 0));
      c.set(Calendar.MONTH, LittleEndian.getUShort(data, 2) - 1); // Java months are 0 based!
      c.set(Calendar.DAY_OF_MONTH, LittleEndian.getUShort(data, 4));
      c.set(Calendar.HOUR_OF_DAY, LittleEndian.getUShort(data, 6));
      c.set(Calendar.MINUTE, LittleEndian.getUShort(data, 8));
      c.set(Calendar.SECOND, LittleEndian.getUShort(data, 10));
      // The 7th field is day of week, which we don't require
      c.set(Calendar.MILLISECOND, 0); // Not set in the file
      this.data = c.getTime();
   } else {
      throw new IllegalArgumentException("Invalid date, found " + data.length + " bytes");
   }
}
 

import org.apache.poi.util.LittleEndian; //导入依赖的package包/类
public ComplexFileTable(byte[] documentStream, byte[] tableStream, int offset, int fcMin) throws IOException
{
  //skips through the prms before we reach the piece table. These contain data
  //for actual fast saved files
      List<SprmBuffer> sprmBuffers = new LinkedList<SprmBuffer>();
      while ( tableStream[offset] == GRPPRL_TYPE )
      {
          offset++;
          int size = LittleEndian.getShort( tableStream, offset );
          offset += LittleEndian.SHORT_SIZE;
          byte[] bs = LittleEndian.getByteArray( tableStream, offset, size );
          offset += size;

          SprmBuffer sprmBuffer = new SprmBuffer( bs, false, 0 );
          sprmBuffers.add( sprmBuffer );
      }
      this._grpprls = sprmBuffers.toArray( new SprmBuffer[sprmBuffers.size()] );

  if(tableStream[offset] != TEXT_PIECE_TABLE_TYPE)
  {
    throw new IOException("The text piece table is corrupted");
  }
  int pieceTableSize = LittleEndian.getInt(tableStream, ++offset);
  offset += LittleEndian.INT_SIZE;
  _tpt = new TextPieceTable(documentStream, tableStream, offset, pieceTableSize, fcMin);
}
 

import org.apache.poi.util.LittleEndian; //导入依赖的package包/类
protected void fillFields( byte[] data, int offset )
{
    field_1_cbMac                  = LittleEndian.getInt( data, 0x0 + offset );
    field_2_reserved1              = LittleEndian.getInt( data, 0x4 + offset );
    field_3_reserved2              = LittleEndian.getInt( data, 0x8 + offset );
    field_4_reserved3              = LittleEndian.getInt( data, 0xc + offset );
    field_5_reserved4              = LittleEndian.getInt( data, 0x10 + offset );
    field_6_ccpText                = LittleEndian.getInt( data, 0x14 + offset );
    field_7_ccpFtn                 = LittleEndian.getInt( data, 0x18 + offset );
    field_8_ccpHdd                 = LittleEndian.getInt( data, 0x1c + offset );
    field_9_ccpMcr                 = LittleEndian.getInt( data, 0x20 + offset );
    field_10_ccpAtn                = LittleEndian.getInt( data, 0x24 + offset );
    field_11_ccpEdn                = LittleEndian.getInt( data, 0x28 + offset );
    field_12_ccpTxbx               = LittleEndian.getInt( data, 0x2c + offset );
    field_13_ccpHdrTxbx            = LittleEndian.getInt( data, 0x30 + offset );
    field_14_reserved5             = LittleEndian.getInt( data, 0x34 + offset );
}
 

import org.apache.poi.util.LittleEndian; //导入依赖的package包/类
@Override
public void readValue(InputStream stream) throws IOException {
   // 8 bytes of reserved zeros
   LittleEndian.readLong(stream);
   
   // Nexts and counts
   nextRecipientId = LittleEndian.readUInt(stream);
   nextAttachmentId = LittleEndian.readUInt(stream);
   recipientCount = LittleEndian.readUInt(stream);
   attachmentCount = LittleEndian.readUInt(stream);
   
   // 8 bytes of reserved zeros
   LittleEndian.readLong(stream);
   
   // Now properties
   readProperties(stream);
}
 

import org.apache.poi.util.LittleEndian; //导入依赖的package包/类
/**
 * Gets the papx grpprl for the paragraph at index in this fkp.
 *
 * @param index The index of the papx to get.
 * @return a papx grpprl.
 */
protected byte[] getGrpprl(int index)
{
    int papxOffset = 2 * LittleEndian.getUnsignedByte(_fkp, _offset + (((_crun + 1) * FC_SIZE) + (index * BX_SIZE)));
    int size = 2 * LittleEndian.getUnsignedByte(_fkp, _offset + papxOffset);
    if(size == 0)
    {
        size = 2 * LittleEndian.getUnsignedByte(_fkp, _offset + ++papxOffset);
    }
    else
    {
        size--;
    }

    byte[] papx = new byte[size];
    System.arraycopy(_fkp, _offset + ++papxOffset, papx, 0, size);
    return papx;
}
 

import org.apache.poi.util.LittleEndian; //导入依赖的package包/类
protected byte[] toByteArray()
{
  // set up the fc
  int tempFc = fc;
  if (!unicode)
  {
    tempFc *= 2;
    tempFc |= (0x40000000);
  }

  int offset = 0;
  byte[] buf = new byte[8];
  LittleEndian.putShort(buf, offset, descriptor);
  offset += LittleEndian.SHORT_SIZE;
  LittleEndian.putInt(buf, offset, tempFc);
  offset += LittleEndian.INT_SIZE;
  LittleEndian.putShort(buf, offset, prm.getValue());

  return buf;

}