/// <summary>
/// Decodes the object by PER.
/// </summary>
/// <param name="buffer">A buffer that contains a PER encoding result.</param>
/// <param name="aligned">Indicating whether the PER decoding is aligned.</param>
/// <remarks>Length is included.</remarks>
protected override void ValuePerDecode(IAsn1DecodingBuffer buffer, bool aligned = true)
{
ByteArrayValue = Asn1StandardProcedure.PerDecodeArray <byte>(buffer,
decodingBuffer =>
{
Asn1Integer ai = new Asn1Integer(null, 0, 15);
ai.PerDecode(buffer);
if (Constraint == null || Constraint.PermittedCharSet == null)
{
if (ai.Value == 0)
{
return((byte)' ');
}
else if (ai.Value >= 1 && ai.Value <= 10)
{
return((byte)((byte)'0' + ai.Value - 1));
}
else
{
throw new Asn1DecodingUnexpectedData(ExceptionMessages.DecodingUnexpectedData +
"Only 0~9 and SPACE are allowed in NumericString.");
}
}
else
{
int index = (int)ai.Value;
return((byte)CharSetInArray[(int)ai.Value]);
}
},
Constraint != null && Constraint.HasMinSize ? Constraint.MinSize : (long?)null, Constraint != null && Constraint.HasMaxSize ? Constraint.MaxSize : (long?)null,
true);
}
/// <summary>
/// Decodes the object by PER.
/// </summary>
/// <param name="buffer">A buffer that contains a PER encoding result.</param>
/// <param name="aligned">Indicating whether the PER decoding is aligned.</param>
/// <remarks>Length is included.</remarks>
protected override void ValuePerDecode(IAsn1DecodingBuffer buffer, bool aligned = true)
{
if (Constraint != null && Constraint.HasMinSize && Constraint.HasMinSize &&
Constraint.MinSize == Constraint.MaxSize && Constraint.MinSize <= 2) //Ref. X.691:16.6
{
long minSize = Constraint.MinSize;
bool[] bitResult = buffer.ReadBits((int)(8 * minSize));
byte[] byteResult = new byte[(int)minSize];
//Convert bool array to byte array
int byteIndex = 0, bitIndex = 0;
foreach (bool b in bitResult)
{
if (b)
{
byteResult[byteIndex] |= (byte)(1 << (7 - bitIndex));
}
bitIndex++;
if (bitIndex == 8)
{
bitIndex = 0;
byteIndex++;
}
}
ByteArrayValue = byteResult;
}
else
{
ByteArrayValue = Asn1StandardProcedure.PerDecodeArray(buffer,
decodingBuffer => decodingBuffer.ReadByte(),
Constraint != null && Constraint.HasMinSize ? Constraint.MinSize : (long?)null, Constraint != null && Constraint.HasMaxSize ? Constraint.MaxSize : (long?)null);
}
}
