Examples with ByteOrder java.nio.ByteOrder used on opensource projects

Example 11 with ByteOrder

use of java.nio.ByteOrder in project jdk8u_jdk by JetBrains.

the class MotifDnDConstants method getTargetListTable.

/**
     * DragBSI.h:
     *
     * typedef struct {
     *    BYTE          byte_order;
     *    BYTE          protocol_version;
     *    CARD16        num_target_lists B16;
     *    CARD32        heap_offset B32;
     * } xmMotifTargetsPropertyRec;
     */
private static long[][] getTargetListTable(long motifWindow) throws XException {
    WindowPropertyGetter wpg = new WindowPropertyGetter(motifWindow, XA_MOTIF_DRAG_TARGETS, 0, 100000L, false, XA_MOTIF_DRAG_TARGETS.getAtom());
    try {
        int status = wpg.execute(XErrorHandler.IgnoreBadWindowHandler.getInstance());
        if (status != XConstants.Success || wpg.getActualType() != XA_MOTIF_DRAG_TARGETS.getAtom() || wpg.getData() == 0) {
            return null;
        }
        long data = wpg.getData();
        if (unsafe.getByte(data + 1) != MOTIF_DND_PROTOCOL_VERSION) {
            return null;
        }
        boolean swapNeeded = unsafe.getByte(data + 0) != getByteOrderByte();
        short numTargetLists = unsafe.getShort(data + 2);
        if (swapNeeded) {
            numTargetLists = Swapper.swap(numTargetLists);
        }
        long[][] table = new long[numTargetLists][];
        ByteOrder byteOrder = ByteOrder.nativeOrder();
        if (swapNeeded) {
            byteOrder = (byteOrder == ByteOrder.LITTLE_ENDIAN) ? ByteOrder.BIG_ENDIAN : ByteOrder.LITTLE_ENDIAN;
        }
        long bufptr = data + 8;
        for (short i = 0; i < numTargetLists; i++) {
            short numTargets = unsafe.getShort(bufptr);
            bufptr += 2;
            if (swapNeeded) {
                numTargets = Swapper.swap(numTargets);
            }
            table[i] = new long[numTargets];
            for (short j = 0; j < numTargets; j++) {
                // NOTE: cannot use Unsafe.getInt(), since it crashes on
                // Solaris/Sparc if the address is not a multiple of 4.
                int target = 0;
                if (byteOrder == ByteOrder.LITTLE_ENDIAN) {
                    for (int idx = 0; idx < 4; idx++) {
                        target |= (unsafe.getByte(bufptr + idx) << 8 * idx) & (0xFF << 8 * idx);
                    }
                } else {
                    for (int idx = 0; idx < 4; idx++) {
                        target |= (unsafe.getByte(bufptr + idx) << 8 * (3 - idx)) & (0xFF << 8 * (3 - idx));
                    }
                }
                // NOTE: don't need to swap, since we read it in the proper
                // order already.
                table[i][j] = target;
                bufptr += 4;
            }
        }
        return table;
    } finally {
        wpg.dispose();
    }
}

Example 12 with ByteOrder

use of java.nio.ByteOrder in project jdk8u_jdk by JetBrains.

the class AbstractPerfDataBufferPrologue method getMagic.

/**
     * Get the magic number.
     *
     * @return int - the magic number
     */
public int getMagic() {
    // the magic number is always stored in big-endian format
    ByteOrder order = byteBuffer.order();
    byteBuffer.order(ByteOrder.BIG_ENDIAN);
    // get the magic number
    byteBuffer.position(PERFDATA_PROLOG_MAGIC_OFFSET);
    int magic = byteBuffer.getInt();
    // restore the byte order
    byteBuffer.order(order);
    return magic;
}

Example 13 with ByteOrder

use of java.nio.ByteOrder in project jdk8u_jdk by JetBrains.

the class AbstractPerfDataBufferPrologue method getByteOrder.

/**
     * Get the byte order for the given ByteBuffer.
     *
     * @return int - the byte order of the instrumentation buffer
     */
public static ByteOrder getByteOrder(ByteBuffer bb) {
    // save buffer state
    int position = bb.position();
    bb.position(PERFDATA_PROLOG_BYTEORDER_OFFSET);
    ByteOrder order = (bb.get() == PERFDATA_BIG_ENDIAN) ? ByteOrder.BIG_ENDIAN : ByteOrder.LITTLE_ENDIAN;
    // restore buffer state.
    bb.position(position);
    return order;
}

Example 14 with ByteOrder

use of java.nio.ByteOrder in project ignite by apache.

the class MurmurHash method hash.

/**
 * Hashes the bytes in a buffer from the current position to the limit.
 *
 * @param buf The bytes to hash.
 * @param seed The seed to start with.
 * @return The 32 bit murmur hash of the bytes in the buffer.
 */
public static int hash(ByteBuffer buf, int seed) {
    ByteOrder byteOrder = buf.order();
    buf.order(ByteOrder.LITTLE_ENDIAN);
    int m = 0x5bd1e995;
    int r = 24;
    int h = seed ^ buf.remaining();
    while (buf.remaining() >= 4) {
        int k = buf.getInt();
        k *= m;
        k ^= k >>> r;
        k *= m;
        h *= m;
        h ^= k;
    }
    if (buf.remaining() > 0) {
        ByteBuffer finish = ByteBuffer.allocate(4).order(ByteOrder.LITTLE_ENDIAN);
        finish.put(buf).rewind();
        h ^= finish.getInt();
        h *= m;
    }
    h ^= h >>> 13;
    h *= m;
    h ^= h >>> 15;
    buf.order(byteOrder);
    return h;
}

Example 15 with ByteOrder

use of java.nio.ByteOrder in project suite by stupidsing.

the class GpuTest method test.

@Test
public void test() {
    String openCl = // 
    "" + // 
    "__kernel void add_floats(__global float *a, __global float *b, __global float *o, int n) { \n" + // 
    "    int i = get_global_id(0); \n" + // 
    "    if (i < n) o[i] = a[i] * a[i] + b[i] * b[i]; \n" + // 
    "} \n";
    CLContext context = JavaCL.createBestContext();
    CLQueue queue = context.createDefaultQueue();
    ByteOrder byteOrder = context.getByteOrder();
    int n = 1024;
    Pointer<Float> inp0 = Pointer.allocateFloats(n).order(byteOrder);
    Pointer<Float> inp1 = Pointer.allocateFloats(n).order(byteOrder);
    for (int i = 0; i < n; i++) {
        inp0.set(i, (float) Math.cos(i));
        inp1.set(i, (float) Math.sin(i));
    }
    CLBuffer<Float> out = context.createBuffer(Usage.Output, Float.class, n);
    CLKernel kernel = context.createProgram(openCl).createKernel("add_floats");
    kernel.setArgs(context.createBuffer(Usage.Input, inp0), context.createBuffer(Usage.Input, inp1), out, n);
    Pointer<Float> outp = out.read(queue, kernel.enqueueNDRange(queue, new int[] { n }));
    for (CLDevice device : context.getDevices()) System.out.println(device);
    for (int i = 0; i < min(10, n); i++) System.out.println("out[" + i + "] = " + outp.get(i));
}