Ricoh InfoPrint Manager for AIX, Руководство пользователя

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Important considerations
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Code processing becomes an integral part of PSF and can affect performance and
reliability.
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User-exits should be coded by experienced programmers who are aware of overall
system implications.
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Any delays caused by this exit will translate into a PSF processing delay and could
affect printer performance .
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This exit is not passed any structured fields that are contained in resources that are
processed. This includes: form definitions, overlays, page segments, fonts, data object
resources, internal medium maps, and data object fonts.
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Code processing must be able to handle PSF repositioning.
Repositioning can occur as a result of errors or operator commands. PSF can reposition
items forward into the print job, skip structured fields, or reposition items back into
previously processed data. If PSF repositions back into the print file, it is the responsibility
of the exit to return the same data in the same sequence to PSF, just as it did when the
structured field was originally passed to the exit.
Because of the constraints outlined above, you should first consider using the transform
subsystem to process data, because the transform subsystem does not have these
limitations. For example, a transform object would have access to all of the input data (no
restrictions) and could add, delete, and modify both resources and pages. In addition, the
transform subsystem processing is done before printing begins, so it would have no impact
on printer performance or behavior.
The input data user-exit is not capable of identifying individual document boundaries in a
data stream. For example, your job might have 5 separate documents that each contain 10
pages of data. This is viewed by the exit as 50 pages of data, not 5 units of 10. The
transform subsystem does not have this limitation.
The PSF Input Record Exit is responsible for managing any memory it allocates. It
can reuse the memory across calls through the use of a work area pointer provided
in
ainuexit.h
. PSF does not free any memory that might be pointed to by fields in
either the INDATA_EXITDATA structure or the PSFINSERTRECS structure. The exit can
point to memory that it has defined or allocated. The exit can reuse allocated
memory or free memory when it is appropriate. PSF might run out of memory if
the PSF Input Record Exit mismanages memory.
The source code (in the C programming language) for the sample input data
user-exit program listed on page 57 is in the
/usr/lpp/psf/exits/ainuxind.c file. This
sample program consists of a return code and performs no function.
The data structures for the input data user-exit program are included with the
source code in the
/usr/lpp/psf/exits/ainuexit.h file.
The declaration of this exit is:
void INDATA (INDATA_EXITDATA *exitdata)
The INDATA_EXITDATA input/output parameter contains all of the input and
output data needed to communicate between InfoPrint Manager and the user-exit
program.
These fields are also found in the input data user-exit:
Chapter 6. User-exit programs (PSF, Generalized Fax, and Email DSS only)
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