Asn1Util Class Reference

Static Public Member Functions
static System.String	BCDToString (byte[] bcd)
static void	CloseRuntime ()
static byte []	DecodeBase64Array (char[] srcArray)
static string	EncodeBase64Array (byte[] srcArray)
static byte []	GetAddressBytes (string ipaddress)
static int	GetBytesCount (long val)
static int	GetUlongBytesCount (long val)
static int	HexToByte (char c)
static bool	IsLimited ()
static byte []	StringToBCD (System.String str)
static byte []	StringToTBCD (System.String str)
static String	StripWhitespace (String value)
static char	TbcdBinToChar (byte tbcdDigit)
static byte	TbcdCharToBin (char digit)
static System.String	TBCDToString (byte[] bcd)
static void	ToArray (System.Collections.ICollection c, System.Object[] objects)
static byte []	ToByteArray (System.String sourceString)
static char []	ToCharArray (byte[] byteArray)
static char	ToHexChar (int nibble)
static System.String	ToHexString (byte b)
static System.String	ToHexString (byte[] b, int offset, int nbytes)
static System.String	ToHexString (byte[] b, int offset, int nbytes, bool spaces)
static int	URShift (int number, int bits)
static int	URShift (int number, long bits)
static long	URShift (long number, int bits)
static long	URShift (long number, long bits)
static void	WriteStackTrace (System.Exception throwable, System.IO.TextWriter stream)

Detailed Description

This class contains some general purpose static utility functions.

Member Function Documentation

BCDToString()

static System.String BCDToString ( byte []  bcd )

static

Translates a BCD string to an ASCII string. The returned string will consist of characters in [0..9] and [A-E]. All half-bytes in the input shall be less than 0xF, except that in the final byte, the low half-byte may be 0xF, to act as filler for a string of odd length.

Parameters

bcd	the source BCD string

Returns

the ASCII string.

References Asn1Util.URShift().

Referenced by Asn1BCDString.ToString().

CloseRuntime()

static void CloseRuntime ( )

static

Signal that you are finished with the ASN1C runtime and release internal resources. Do not use the runtime classes, on any thread, after calling this.

This may be called from any thread.

DecodeBase64Array()

static byte [] DecodeBase64Array ( char []  srcArray )

static

Translates the specified Base64 array into byte array. The resulting array could be converted to the String by new String (byte[]) constructor.

Parameters

srcArray

Base64 byte array to be translated

Returns

decoded byte array

Referenced by Asn1OctetString.DecodeXER(), and Asn1OctetString.DecodeXML().

EncodeBase64Array()

static string EncodeBase64Array ( byte []  srcArray )

static

Translates the specified byte array to Base64 string.

Parameters

srcArray

byte array to be translated

Returns

Base64 encoded string

GetAddressBytes()

static byte [] GetAddressBytes ( string  ipaddress )

static

Converts an IPaddress to byte array

Parameters

ipaddress

String representation of IP Address

Returns

The byte array(size 4) represenation of IP address

References Tokenizer.HasMoreTokens(), and Tokenizer.NextToken().

GetBytesCount()

static int GetBytesCount ( long  val )

static

Calculate the number of bytes necessary to represent a signed long value.

Parameters

val	singed long value.

Returns

the number of bytes.

Referenced by Asn1Real.Encode(), Asn1BerOutputStream.EncodeLength(), and Asn1Real.NormalizedRealValueToString().

GetUlongBytesCount()

static int GetUlongBytesCount ( long  val )

static

Calculate the number of bytes necessary to represent an unsigned long value.

Parameters

val	unsinged long value.

Returns

the number of bytes.

Referenced by Asn1Real.Encode(), and Asn1Real.NormalizedRealValueToString().

HexToByte()

static int HexToByte ( char  c )

static

Return the value of a single hexadecimal character. /p>

Parameters

c	The hex character (0-9,A-F,a-f)

Returns

Value of hex character, 0-15.

Exceptions

Asn1Exception

Thrown if character is not a valid hexadecimal character.

IsLimited()

static bool IsLimited ( )

static

Indicates whether the run-time is limited or unlimited.

Returns

true if limited, false if unlimited

StringToBCD()

static byte [] StringToBCD ( System.String  str )

static

Translates an ASCII string to a BCD string. The ASCII string must contain only the following characters: [0..9A-Ea-e]. If the length of the source string is not even, the unused part of the last byte will be set to 0xF.

Parameters

str	the source ASCII string

Returns

the BCD string as a byte array.

Exceptions

Asn1ValueParseException

If invalid characters are in the source string.

StringToTBCD()

static byte [] StringToTBCD ( System.String  str )

static

Translates an ASCII string to a TBCD string. The TBCD encoding format is as described in 3GPP 29.002:

• the characters used are [0-9*#abc].
• each nibble represents a digit, and the upper nibble represents the digit which follows the digit represented in the lower nibble.
• 0xF is used as filler in the final high nibble when the input string has and odd length. The string "12345" would be encoded 0x2143f5.

Parameters

str	the source ASCII string

Returns

the TBCD string as a byte array.

Exceptions

Asn1ValueParseException

If invalid characters are in the source string.

StripWhitespace()

static String StripWhitespace ( String  value )

static

Return the given string with all whitespace characters removed. Here, "whitespace characters" means those characters defined by X.680 12.1.6 as whitespace: HT, LF, VT, FF, CR, SPACE.

Returns

value, with all whitespace removed; if the input string has no whitespace, it is returned itself.

Referenced by Asn1OID_IRI.Encode().

TbcdBinToChar()

static char TbcdBinToChar ( byte  tbcdDigit )

static

This function converts a TBCD binary character into its ASCII equivalent. /p>

Parameters

tbcdDigit

TBCD digit

Returns

the converted character

TbcdCharToBin()

static byte TbcdCharToBin ( char  digit )

static

This function converts a TBCD character ('0'-'9',"*#abc") into its binary equivalent. /p>

Parameters

digit

TBCD digit character ('0'-'9',"*#abc")

Returns

binary representation of given char

TBCDToString()

static System.String TBCDToString ( byte []  bcd )

static

Translates a TBCD string to an ASCII string. Refer to the description of TBCD in stringToTBCD.

Parameters

bcd	the source TBCD string

Returns

the ASCII string.

References Asn1Util.URShift().

Referenced by Asn1TBCDString.ToString().

ToArray()

static void ToArray ( System.Collections.ICollection  c, System.Object []  objects  )

static

Obtains an array containing all the elements of the collection.

Parameters

c	The Collection instance, which contains the elements.
objects	The array into which the elements of the collection will be stored.

Returns

The array containing all the elements of the collection.

ToByteArray()

static byte [] ToByteArray ( System.String  sourceString )

static

Converts a string to an array of bytes

Parameters

sourceString

The string to be converted

Returns

The new array of bytes

Referenced by Asn1CerOutputStream.EncodeCharString(), and Asn1BerOutputStream.EncodeCharString().

ToCharArray()

static char [] ToCharArray ( byte []  byteArray )

static

Converts an array of bytes to an array of chars

Parameters

byteArray

The array of bytes to convert

Returns

The new array of chars

Referenced by Asn1XmlAnyElem.XsdAnySaxHandler.EndElement(), and Asn1OpenType.SaxHandler.EndElement().

ToHexChar()

static char ToHexChar ( int  nibble )

static

Convert a value from 0x0 to 0xF to the corresponding hex char. Lowercase letters are used for the hex characters. /p>

ToHexString() [1/3]

static System.String ToHexString ( byte  b )

static

Convert a byte value to a hex string. Unlike the C# built-in function, this will:

a. not sign extend the byte value out to 32 bits if the MSB is set, and b. put a zero padding byte in front if less than 0xf

In other words, a character string of length 2 is always returned.

Parameters

b	byte value

Returns

Hex String value

Referenced by Asn1BerMessageDumpHandler.Contents(), Asn1DecodeBitBuffer.DecodeBitsToLong(), Asn1DecodeBitBuffer.DecodeBitsToOctetArray(), Asn1OpenType.Encode(), Asn1PerBitFieldPrinter.Print(), Diag.Prtln(), Asn1DecodeBuffer.Read(), Asn1BerMessageDumpHandler.StartElement(), Asn1BitString.ToHexString(), and Asn1OctetString.ToString().

ToHexString() [2/3]

static System.String ToHexString ( byte []  b, int  offset, int  nbytes  )

static

Convert a array of bytes into a hex string.

Parameters

b	byte array to be converted to hex string
offset	start position in byte array
nbytes	no. of bytes to be converted

Returns

Hex String value

ToHexString() [3/3]

static System.String ToHexString ( byte []  b, int  offset, int  nbytes, bool  spaces  )

static

Convert a array of bytes into a hex string.

Parameters

b	byte array to be converted to hex string
offset	start position in byte array
nbytes	no. of bytes to be converted
spaces	Pass true if each byte's hex digits should be followed by a space character.

Returns

Hex String value

URShift() [1/4]

static int URShift ( int  number, int  bits  )

static

Performs an unsigned bitwise right shift with the specified number. The low-order bits of number are discarded, the remaining bits are shifted right, and the high-order empty bit positions are set to zero.

Parameters

number	Number to operate on
bits	Ammount of bits to shift

Returns

The resulting number from the shift operation

Referenced by Asn1Util.BCDToString(), Asn1DecodeBitBuffer.DecodeBitsToLong(), Asn1Real.Encode(), Asn1XerEncodeBuffer.EncodeBinStrValue(), Asn1XerOutputStream.EncodeBinStrValue(), Asn1XmlEncodeBuffer.EncodeBinStrValue(), Asn1XmlOutputStream.EncodeBinStrValue(), Asn1XmlEncodeBuffer.EncodeByte(), Asn1XerEncodeBuffer.EncodeByte(), Asn1XmlOutputStream.EncodeByte(), Asn1UniversalString.EncodeData(), Asn1BerOutputStream.EncodeIdentifier(), Asn1PerEncodeBuffer.EncodeInt(), Asn1CerOutputStream.EncodeUnivString(), Asn1BerOutputStream.EncodeUnivString(), BigInteger.Init(), Asn1Real.NormalizedRealValueToString(), Asn1PerEncodeBuffer.SetSizeConstraintExt(), and Asn1Util.TBCDToString().

URShift() [2/4]

static int URShift ( int  number, long  bits  )

static

Performs an unsigned bitwise right shift with the specified number The low-order bits of number are discarded, the remaining bits are shifted right, and the high-order empty bit positions are set to zero.

Parameters

number	Number to operate on
bits	Ammount of bits to shift

Returns

The resulting number from the shift operation

URShift() [3/4]

static long URShift ( long  number, int  bits  )

static

Performs an unsigned bitwise right shift with the specified number The low-order bits of number are discarded, the remaining bits are shifted right, and the high-order empty bit positions are set to zero.

Parameters

number	Number to operate on
bits	Ammount of bits to shift

Returns

The resulting number from the shift operation

URShift() [4/4]

static long URShift ( long  number, long  bits  )

static

Performs an unsigned bitwise right shift with the specified number The low-order bits of number are discarded, the remaining bits are shifted right, and the high-order empty bit positions are set to zero.

Parameters

number	Number to operate on
bits	Ammount of bits to shift

Returns

The resulting number from the shift operation

WriteStackTrace()

static void WriteStackTrace ( System.Exception  throwable, System.IO.TextWriter  stream  )

static

Writes the exception stack trace to the received stream

Parameters

throwable	Exception to obtain information from
stream	Output sream used to write to

Referenced by Asn1XmlEncodeBuffer.Copy(), Asn1XerEncodeBuffer.Copy(), Asn1UTF8String.Encode(), Asn1XerOutputStream.Write(), and Asn1XmlOutputStream.Write().