| public static determineConsecutiveDigitCount ( String msg, int startpos ) : int | ||
| msg | String | the message |
| startpos | int | the start position within the message |
| return | int | |
public void encode(EncoderContext context)
{
//step B
int n = HighLevelEncoder.determineConsecutiveDigitCount(context.Message, context.Pos);
if (n >= 2)
{
context.writeCodeword(encodeASCIIDigits(context.Message[context.Pos],
context.Message[context.Pos + 1]));
context.Pos += 2;
}
else
{
char c = context.CurrentChar;
int newMode = HighLevelEncoder.lookAheadTest(context.Message, context.Pos, EncodingMode);
if (newMode != EncodingMode)
{
switch (newMode)
{
case Encodation.BASE256:
context.writeCodeword(HighLevelEncoder.LATCH_TO_BASE256);
context.signalEncoderChange(Encodation.BASE256);
return;
case Encodation.C40:
context.writeCodeword(HighLevelEncoder.LATCH_TO_C40);
context.signalEncoderChange(Encodation.C40);
return;
case Encodation.X12:
context.writeCodeword(HighLevelEncoder.LATCH_TO_ANSIX12);
context.signalEncoderChange(Encodation.X12);
break;
case Encodation.TEXT:
context.writeCodeword(HighLevelEncoder.LATCH_TO_TEXT);
context.signalEncoderChange(Encodation.TEXT);
break;
case Encodation.EDIFACT:
context.writeCodeword(HighLevelEncoder.LATCH_TO_EDIFACT);
context.signalEncoderChange(Encodation.EDIFACT);
break;
default:
throw new InvalidOperationException("Illegal mode: " + newMode);
}
}
else if (HighLevelEncoder.isExtendedASCII(c))
{
context.writeCodeword(HighLevelEncoder.UPPER_SHIFT);
context.writeCodeword((char)(c - 128 + 1));
context.Pos++;
}
else
{
context.writeCodeword((char)(c + 1));
context.Pos++;
}
}
}
