Re: RPG & the IFS & CSV

[Barbara Morris <bmorris@xxxxxxxxxx>]

Scott Klement wrote:
>
> fopen() and friends are the C functions for accessing the IFS.  Those do
> require QC2LE.
>

If you do use the C functions to access the IFS, watch out for the
external names of the functions.  When a C program is compiled with
*IFSIO, fopen() and friends are actually mapped to other names
(_C_IFS_fopen etc) at compile time.  Look at stdio.h, where it includes
ifs.h.  ifs.h has some pragma maps that map all the I/O functions to the
new names.

The RPG version of pragma map is EXTPROC.  So you'd code something like
this:

D fopen     PR
 /if defined(USE_IFS)
D                         extproc('_C_IFS_fopen')
 /else
D                         extproc('fopen')
 /endif
D   parms

or maybe something like this

D fopen      PR           extproc('fopen')
D   parms

D fopen_IFS  PR           extproc('_C_IFS_fopen')
D   parms