luky.crypt
Class BinConverter

java.lang.Object
  luky.crypt.BinConverter

public class BinConverter
extends Object

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

Version:

16 May 2000

Author:

Markus Hahn

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

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, 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