Example usage for java.nio ByteBuffer getShort

Introduction

In this page you can find the example usage for java.nio ByteBuffer getShort.

Prototype

public abstract short getShort(int index);

Source Link

Document

Returns the short at the specified index.

Usage

From source file:Main.java

public static void main(String[] args) {
    ByteBuffer bb = ByteBuffer.allocate(BSIZE);

    bb.asShortBuffer().put((short) 471142);
    System.out.println(bb.getShort(0));

}

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From source file:Main.java

public static int getUnsignedShort(ByteBuffer bb, int position) {
    return (bb.getShort(position) & 0xffff);
}

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From source file:Main.java

public static int getUnsignedShort(final ByteBuffer pByteBuffer, final int pPosition) {
    return pByteBuffer.getShort(pPosition) & 0xFFFF;
}

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From source file:Main.java

public static int byteArrayToShort(byte[] bytes, int offset) {
    ByteBuffer bb = ByteBuffer.wrap(bytes);
    bb.order(ByteOrder.LITTLE_ENDIAN);
    return bb.getShort(offset);
}

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From source file:Main.java

private static short stream2Short(byte[] stream, int offset) {
    ByteBuffer buffer = ByteBuffer.allocate(2);
    buffer.order(ByteOrder.LITTLE_ENDIAN);
    buffer.put(stream[offset]);//from www.  j  a v  a  2 s.  c o m
    buffer.put(stream[offset + 1]);
    return buffer.getShort(0);
}

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From source file:org.bimserver.utils.BinUtils.java

public static short readShort(byte[] value, int index) {
    ByteBuffer byteBuffer = ByteBuffer.wrap(value);
    return byteBuffer.getShort(index);
}

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From source file:com.linkedin.databus.core.DbusEventPart.java

/**
 * @return the length of the DbusEventPart that is encoded in 'buf' at position 'position'.
 * Callers can use this method to advance across the DbusEventPart in a serialized V2 event.
 *//*  ww w  .j  av  a  2  s.  co m*/
public static int partLength(ByteBuffer buf, int position) {
    DbusEvent.SchemaDigestType digestType = digestType(buf.getShort(position + AttributesOffset));
    int digestLen = digestLen(digestType);
    return AttributesOffset + AttributesLen + digestLen + buf.getInt(position);
}

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From source file:com.linkedin.databus.core.DbusEventPart.java

/**
 * Replace the schema-digest in a serialized DbusEventPart.
 *
 * @param buf The buffer that contains the serialized DbusEventPart.
 * @param position the position in the buffer where the DbusEventPart starts.
 * @param schemaDigest The digest value to substitute. The value must match in length to the existing value.
 *//*  ww  w.j a  v a2  s .  c om*/
public static void replaceSchemaDigest(ByteBuffer buf, int position, byte[] schemaDigest) {
    DbusEvent.SchemaDigestType digestType = digestType(buf.getShort(position + AttributesOffset));
    int digestLen = digestLen(digestType);
    if (schemaDigest.length != digestLen) {
        throw new RuntimeException(
                "Expecting length " + digestLen + " for type " + digestType + ", found " + schemaDigest.length);
    }
    for (int i = 0; i < digestLen; i++) {
        buf.put(position + AttributesOffset + AttributesLen + i, schemaDigest[i]);
    }
}

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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");
    }//  w w  w  . j ava2 s .co m
    // 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");
}

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From source file:net.onrc.openvirtex.packet.OVXLLDP.java

/**
 * Checks if packet has size of OVX-generated LLDP, and correctness of two
 * organizationally specific TLVs that use ON.Lab's OUI. Assumes packet is
 * valid LLDP packet// ww  w. ja  va  2s .c om
 *
 * @param packet
 * @return
 */
public static boolean isOVXLLDP(byte[] packet) {
    if (packet.length < OVX_LLDP_SIZE) {
        return false;
    }

    // Extra offset due to VLAN tag
    final ByteBuffer bb = ByteBuffer.wrap(packet);
    int offset = 0;
    if (bb.getShort(ETHERTYPE_OFFSET) != Ethernet.TYPE_LLDP
            && bb.getShort(ETHERTYPE_OFFSET) != Ethernet.TYPE_BSN) {
        offset = 4;
    }

    // Compare packet's organizationally specific TLVs to the expected
    // values
    for (int i = 0; i < OUI_TLV.length; i++) {
        if (packet[NAME_TLV_OFFSET + offset + i] != OUI_TLV[i]) {
            return false;
        }
    }

    return true;
}

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