Java Utililty Methods Array Unpack

List of utility methods to do Array Unpack

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Description

The list of methods to do Array Unpack are organized into topic(s).

Method

voidunpackLE(long aValue, byte[] aBuf, int aOffset)
unpack LE 
aBuf[aOffset + 0] = (byte) aValue;
aValue >>= 8;
aBuf[aOffset + 1] = (byte) aValue;
aValue >>= 8;
aBuf[aOffset + 2] = (byte) aValue;
aValue >>= 8;
aBuf[aOffset + 3] = (byte) aValue;
aValue >>= 8;
...
byte[]UnpackLittle32(byte[] bytes, int integer)
Unpacks a 32-bit integer value into four bytes in BIG endian format. 
bytes[3] = (byte) ((integer & 0x000000ff));
bytes[2] = (byte) ((integer & 0x0000ff00) >> 8);
bytes[1] = (byte) ((integer & 0x00ff0000) >> 16);
bytes[0] = (byte) ((integer & 0xff000000) >> 24);
return bytes;
longunpackLittleEndianLong(byte[] bytes)
Convert the given little-endian packed byte[8] into a long. 
if (bytes == null) {
    return 0;
assert bytes.length == 8 : bytes.length;
long unpacked = 0;
for (int i = 0; i < 8; ++i) {
    long cur = (bytes[i] & 0xFFL) << (i * 8);
    unpacked += cur;
...
longunpackLong(byte[] arr, int i, int j)
unpack Long 
if (arr.length < i + j) {
    return 0L;
long l = 0L;
int k = (j - 1) * 8;
for (int i1 = 0; i1 < j; i1++) {
    l += byteToInt(arr[i + i1]) << k;
    k -= 8;
...
intunpackw(int[] sourcearray, int arraypos, int[] data, int num, int b)
unpackw 
int howmanyfit = 32 / b;
if (num > howmanyfit) {
    System.arraycopy(sourcearray, arraypos, data, 0, num);
    return num + arraypos;
final int mask = (1 << b) - 1;
int val = sourcearray[arraypos];
for (int k = 0; k < num; ++k) {
...