RE: CPYTOSTMF under the covers

I haven't read any replies to this note yet, as I'm just getting into my
email now, but it seems that your problem is the trailing blanks, not so
much the stream file issue.
CPYTOSTMF will include the extra blanks at the end of the SRCDTA field
anyway, so it may be not be the best choice.
-Bob


-----Original Message-----
From: mi400-bounces@xxxxxxxxxxxx [mailto:mi400-bounces@xxxxxxxxxxxx] On
Behalf Of Hewitt, Rory
Sent: Thursday, October 28, 2004 4:32 PM
To: mi400@xxxxxxxxxxxx
Subject: [MI400] CPYTOSTMF under the covers

All,

More of a C question than an MI question, but...
 
I'm trying to do a read of a database source member using the read()
"UNIX-type" API. However, because OS/400 recognizes that it isn't a
'true' stream file but is a fixed-record-length file, it includes all
the trailing blanks. Since my source file contains text data, I don't
care about all the trailing blanks.
 
I can get round this by either simply reading each record in the source
file and trimming/concatenating them into a variable (my current
approach) or using the CPYTOSTMF command to copy the source member into
a 'true' stream file and then reading that. However, the multiple read
approach is time-consuming and the CPYTOSTMF isn't much faster and
involves a command-interface using QCAPCMD.

Is there any way that I can either directly access the processing which
underlies the CPYTOSTMF command (I notice that there is a called
procedure called
copy_database_file_member__FP23qp0l_stmf_description_tP22qp0l_dbf_descri
ption_tP12qlg_pathnameUsPvPV22qp0l_STMF_DBF_commarea() in one of the
service programs called by the CPYTOSTMF CPP which could be something
useful...) or somehow convince OS/400 that my database file (for the
purposes of the read() API) is actually a 'true' stream file? Is this
information that is held in the file header or is it determined by
OS/400 seeing that the file is in the QSYS file system?

Thanks in advance,

Rory

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