[fpc-pascal] Re: RE : RE : RE : Assigning value to ftVariantdatatype& varbytes-still stuck

[Martin Schreiber]

On Wednesday 10 August 2011 11:51:41 Ludo Brands wrote:

> What I propose is:
> 1 to create overloaded versions of SetFieldData and GetFieldData that
> include a length parameter, to change TStringField.SetAsString and
> TWideStringField.SetAsWideString to use these versions and to migrate the
> different datasets to use these new versions. This way existing (user) code
> using SetFieldData/GetFieldData will still work (and the user still being
> responsible for buffer overruns...) and datasets can correctly save and
> retrieve strings while improving performance.
> 2 change the bufdataset internal storage for ftstring and ftwidestring
> fields to include the string length so that stored strings can be retrieved
> in full when containing #0 characters and without having to copy
> systematically datasize bytes. However this will introduce an incompatible
> binary format for TFpcBinaryDatapacketReader. Having a second
> FpcBinaryIdent would allow for both formats to co-habitate.
>
MSEgui version of tbufdataset uses UnicodeString in recordbuffer for string 
fields, see file lib/common/db/msebufdataset.pas.

Martin