What I don't understand about these nice commands you've laid out is... does this interfere with the fact that I am including the ".ch" file for Harbours SIX implementation? I will admit, I know about 0.00000001% of what you know about Clipper and SIX3... so I am unsure if these commands will magically work with our SIXCDX files.
Hopefully this doesn't sound like a stupid question. -_- 2010/2/4 Przemysław Czerpak <dru...@acn.waw.pl> > On Thu, 04 Feb 2010, smu johnson wrote: > > Hi, > > > 1) We're having a problem with our Harbour compiles not understanding > the > > .DBT standard, when new .DBF files are created. I think it is assuming > that > > when we create Memo fields on a new .DBF table, to assume we want the > .FPT > > standard. However, our old DOS code stuff uses .DBT. Is there a flag to > > switch this? > > See rddInfo() function and RDDI_* macros in dbinfo.ch. > I.e. you can set DBT as default MEMO driver in DBFCDX RDD by: > rddInfo( RDDI_MEMOTYPE, DB_MEMO_DBT, "DBFCDX" ) > or SMT in DBFNTX by: > rddInfo( RDDI_MEMOTYPE, DB_MEMO_SMT, "DBFNTX" ) > > You can also create your own RDD using HBUSRRDD lib with prefered > memo type. > In /src/rdd/usrrdd/rdds/dbtcdx.prg is simple code which creates new > DBTCDX RDD which inherits from DBFCDX but uses DBT as default memo > type. > > The memo type is important only for new files (dbCreate()). > When existing DBF file is open Harbour automatically recognize type of > memo using information from DBF header and enable valid memo driver. > Of course if program which created DBF file set valid memo type signature. > > > 2) On the topic of .DBT and .FPT files, since Harbour is so nice and > > modern, we are wondering which standard we should use. We used the .DBT > > stuff cause that's all there was "back in the day", and wondering if we > > should switch to something else. > > Any you want. DBT allows to store only strings and uses 512 bytes blocks. > FPT allows to store also other data types (numbers, dates, arrays, ...) > and user can set block size (default is 64 bytes) so it's more flexible > and creates smaller files. > It also contains garbage collector which allow to reuse freed regions. > SMT is SIX3 format which have most of FPT features. > All formats are recognized by Harbour. In fact it even recognize different > implementations of FPT formats which can be controlled by: > rddInfo( RDDI_MEMOVERSION, DB_MEMOEXT_* [, <cRDD>] ) > > best regards, > Przemek > _______________________________________________ > Harbour mailing list (attachment size limit: 40KB) > Harbour@harbour-project.org > http://lists.harbour-project.org/mailman/listinfo/harbour > -- smu johnson <smujohn...@gmail.com>
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