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Procedure 1
Using PCFP
Clear the function packet to zeros to ensure that each item in the function packet is set
at its default value. This allows you to concentrate on the values you want to change.
Procedure 2
Set the necessary items in the ACQ_ELT_INFO function packet:
• Set INTERFACE_LEVEL to fp_interface_level_1 (1).
• Set WORK_AREA_SIZE to fp_max_work_area_acq_elt_info (20,000 is the maximum
work area size for the ACQ_ELT_INFO function).
• Set RTN_AREA_SIZE large enough for 100 element entries. (100 entries times the
word length of the long form of the element return entry, which is 16).
• Set SYM_TYPE (d) to TRUE. This indicates that PCFP is to select only symbolic
elements.
• Set INFO_DETAIL to long. This indicates that PCFP is to return the long form of
element return entries.
You do not need to set the other items in the function packet, either because the default
value (0) is the desired value for these, or because PCFP uses these items to return
information to the calling program. In particular, the remaining items denoting element
type selection [ABS_TYPE (a), OMN_TYPE (b), and REL_TYPE (c)] and the items denoting
element subtype selection (arrays e and f) are left initialized to FALSE. This means that
only symbolic element types are selected; and within this type, there is no subtype
restriction. Thus PCFP selects all symbolic elements having any subtype.
Figures 1–12 and 1–13 compare the items of the ACQ_ELT_INFO function packet to the
function packet completed with the numeric equivalents for the items.
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