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Empy String and "\0" actual lenght
Alessio Mazzanti / List
20 Mar 2009 5:27AM ET Hi,
I'm trying to decode the SWX FAST stream, and in particular an optional ASCII string attribute (named RandomisedInterval) with delta operator and no initial value (default base value 'Empty String' is used).
Let suppose we have an undefined dictionary previous value (i.e. the 'Empty String' should be used as previous value) and we read from the stream an ASCII String Delta made by a Substraction Length = 1 followed by an ASCII String that in that case corresponds to the whole RandomisedInterval string "00:02:00".
The problem I'm facing with is quite simple: since I consider the 'Empty String' (the default base value) as a string with lenght=0, a Substraction Length = 1 (meaning to remove 1 character from the back of base value) makes my application to report the error [ERR D7].
I would like to undertand if I'm making a mistake calculating the actual length of the 'Empty String' or if the right behaviour is actually to report the error.
Furthermore, since I also consider the string "\0" as it had length=0, I think a similar problem could arise in any case I have a dictionary previous value = 'Empty String' or "\0".
Many thanks in advance.
Empy String and "\0" actual lenght
Alessio Mazzanti / List 20 Mar 2009 5:27AM ET
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