[fpc-pascal] Custom file drivers

[Anton Shepelev]

Hello, all

The documentation on the FILE and TEXT types says
that "nothing prevents the programmer, from writing
a file driver that stores its data for instance in
memory." Is there a more detailed instruction or an
example illustrating how to do it?

[Marco van de Voort]

Post by Anton Shepelev
The documentation on the FILE and TEXT types says
that "nothing prevents the programmer, from writing
a file driver that stores its data for instance in
memory." Is there a more detailed instruction or an
example illustrating how to do it?

Have a look at unit streamio in package fcl-base (packages/fcl-base/src)
which redirects a textfile to a stream.
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[Anton Shepelev]

The documentation on the FILE and TEXT types
says that "nothing prevents the programmer, from
writing a file driver that stores its data for
instance in memory." Is there a more detailed
instruction or an example illustrating how to do
it?

Have a look at unit streamio in package fcl-base
(packages/fcl-base/src) which redirects a textfile
to a stream.

Thanks. That one works with TEXT overriding its
functions openfunc, inoutfunc, flushfunc, and
closefunc, whereas the structure FileRec has none of
them and contains only a THandle member. Does that
mean that one can write a custom driver for TEXT but
not for FILE?