superwaba.ext.xplat.util.crypto
Class BinConverter

java.lang.Object
  |
  +--superwaba.ext.xplat.util.crypto.BinConverter

public class BinConverter

extends Object

Some helper routines for data conversion, all data is treated in network byte order

Constructor Summary

BinConverter()

Method Summary

static int	binHexToBytes(String sBinHex, byte[] data, int nSrcPos, int nDstPos, int nNumOfBytes) converts a binhex string back into a byte array (invalid codes will be skipped)
static long	byteArrayToLong(byte[] buffer, int nStartIndex) gets bytes from an array into a long
static String	byteArrayToUNCString(byte[] data, int nStartPos, int nNumOfBytes) converts a byte array into an UNICODE string
static String	bytesToBinHex(byte[] data) converts a byte array to a binhex string
static String	bytesToBinHex(byte[] data, int nStartPos, int nNumOfBytes) converts a byte array to a binhex string
static long	intArrayToLong(int[] buffer, int nStartIndex) converts values from an integer array to a long
static int	longHi32(long lVal) gets the higher 32 bits of a long
static int	longLo32(long lVal) gets the lower 32 bits of a long
static void	longToByteArray(long lValue, byte[] buffer, int nStartIndex) converts a long o bytes which are put into a given array
static void	longToIntArray(long lValue, int[] buffer, int nStartIndex) converts a long to integers which are put into a given array
static long	makeLong(int nLo, int nHi) makes a long from two integers (treated unsigned)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, toString, wait, wait

Constructor Detail

BinConverter

public BinConverter()

Method Detail

byteArrayToLong

public static long byteArrayToLong(byte[] buffer,
                                   int nStartIndex)

gets bytes from an array into a long

Parameters:

buffer - where to get the bytes

nStartIndex - index from where to read the data

Returns:

the 64bit integer

longToByteArray

public static void longToByteArray(long lValue,
                                   byte[] buffer,
                                   int nStartIndex)

converts a long o bytes which are put into a given array

Parameters:

lValue - the 64bit integer to convert

buffer - the target buffer

nStartIndex - where to place the bytes in the buffer

intArrayToLong

public static long intArrayToLong(int[] buffer,
                                  int nStartIndex)

converts values from an integer array to a long

Parameters:

buffer - where to get the bytes

nStartIndex - index from where to read the data

Returns:

the 64bit integer

longToIntArray

public static void longToIntArray(long lValue,
                                  int[] buffer,
                                  int nStartIndex)

converts a long to integers which are put into a given array

Parameters:

lValue - the 64bit integer to convert

buffer - the target buffer

nStartIndex - where to place the bytes in the buffer

makeLong

public static long makeLong(int nLo,
                            int nHi)

makes a long from two integers (treated unsigned)

Parameters:

nLo - lower 32bits

nHi - higher 32bits

Returns:

the built long

longLo32

public static int longLo32(long lVal)

gets the lower 32 bits of a long

Parameters:

lVal - the long integer

Returns:

lower 32 bits

longHi32

public static int longHi32(long lVal)

gets the higher 32 bits of a long

Parameters:

lVal - the long integer

Returns:

higher 32 bits

bytesToBinHex

public static String bytesToBinHex(byte[] data)

converts a byte array to a binhex string

Parameters:

data - the byte array

Returns:

the binhex string

bytesToBinHex

public static String bytesToBinHex(byte[] data,
                                   int nStartPos,
                                   int nNumOfBytes)

converts a byte array to a binhex string

Parameters:

data - the byte array

nStartPos - start index where to get the bytes

nNumOfBytes - number of bytes to convert

Returns:

the binhex string

binHexToBytes

public static int binHexToBytes(String sBinHex,
                                byte[] data,
                                int nSrcPos,
                                int nDstPos,
                                int nNumOfBytes)

converts a binhex string back into a byte array (invalid codes will be skipped)

Parameters:

sBinHex - binhex string

data - the target array

nSrcPos - from which character in the string the conversion should begin, remember that (nSrcPos modulo 2) should equals 0 normally

nDstPos - to store the bytes from which position in the array

nNumOfBytes - number of bytes to extract

Returns:

number of extracted bytes

byteArrayToUNCString

public static String byteArrayToUNCString(byte[] data,
                                          int nStartPos,
                                          int nNumOfBytes)

converts a byte array into an UNICODE string

Parameters:

data - the byte array

nStartPos - where to begin the conversion

nNumOfBytes - number of bytes to handle

Returns:

the string