/** * Converts a byte array to a short value * @param bytes byte array * @param offset offset into array * @param length length, has to be {@link #SIZEOF_SHORT} * @return the short value * @throws IllegalArgumentException if length is not {@link #SIZEOF_SHORT} * or if there's not enough room in the array at the offset indicated. */ public static short toShort(byte[] bytes, int offset, final int length) { if (length != SIZEOF_SHORT || offset + length > bytes.length) { throw explainWrongLengthOrOffset(bytes, offset, length, SIZEOF_SHORT); } short n = 0; n ^= bytes[offset] & 0xFF; n <<= 8; n ^= bytes[offset+1] & 0xFF; return n; }
/** * Converts a byte array to a short value * @param bytes byte array * @param offset offset into array * @param length length, has to be {@link #SIZEOF_SHORT} * @return the short value * @throws IllegalArgumentException if length is not {@link #SIZEOF_SHORT} * or if there's not enough room in the array at the offset indicated. */ public static short toShort(byte[] bytes, int offset, final int length) { if (length != SIZEOF_SHORT || offset + length > bytes.length) { throw explainWrongLengthOrOffset(bytes, offset, length, SIZEOF_SHORT); } short n = 0; n ^= bytes[offset] & 0xFF; n <<= 8; n ^= bytes[offset+1] & 0xFF; return n; }
/** * Converts a byte array to an int value * @param bytes byte array * @param offset offset into array * @param length length of int (has to be {@link #SIZEOF_INT}) * @return the int value * @throws IllegalArgumentException if length is not {@link #SIZEOF_INT} or * if there's not enough room in the array at the offset indicated. */ public static int toInt(byte[] bytes, int offset, final int length) { if (length != SIZEOF_INT || offset + length > bytes.length) { throw explainWrongLengthOrOffset(bytes, offset, length, SIZEOF_INT); } int n = 0; for(int i = offset; i < (offset + length); i++) { n <<= 8; n ^= bytes[i] & 0xFF; } return n; }
/** * Converts a byte array to a long value. * * @param bytes array of bytes * @param offset offset into array * @param length length of data (must be {@link #SIZEOF_LONG}) * @return the long value * @throws IllegalArgumentException if length is not {@link #SIZEOF_LONG} or * if there's not enough room in the array at the offset indicated. */ public static long toLong(byte[] bytes, int offset, final int length) { if (length != SIZEOF_LONG || offset + length > bytes.length) { throw explainWrongLengthOrOffset(bytes, offset, length, SIZEOF_LONG); } long l = 0; for(int i = offset; i < offset + length; i++) { l <<= 8; l ^= bytes[i] & 0xFF; } return l; }
/** * Converts a byte array to an int value * @param bytes byte array * @param offset offset into array * @param length length of int (has to be {@link #SIZEOF_INT}) * @return the int value * @throws IllegalArgumentException if length is not {@link #SIZEOF_INT} or * if there's not enough room in the array at the offset indicated. */ public static int toInt(byte[] bytes, int offset, final int length) { if (length != SIZEOF_INT || offset + length > bytes.length) { throw explainWrongLengthOrOffset(bytes, offset, length, SIZEOF_INT); } int n = 0; for(int i = offset; i < (offset + length); i++) { n <<= 8; n ^= bytes[i] & 0xFF; } return n; }
/** * Converts a byte array to a long value. * * @param bytes array of bytes * @param offset offset into array * @param length length of data (must be {@link #SIZEOF_LONG}) * @return the long value * @throws IllegalArgumentException if length is not {@link #SIZEOF_LONG} or * if there's not enough room in the array at the offset indicated. */ public static long toLong(byte[] bytes, int offset, final int length) { if (length != SIZEOF_LONG || offset + length > bytes.length) { throw explainWrongLengthOrOffset(bytes, offset, length, SIZEOF_LONG); } long l = 0; for(int i = offset; i < offset + length; i++) { l <<= 8; l ^= bytes[i] & 0xFF; } return l; }