NX Nastran DMAP Programmer's Guide - Kxcad.net

OUTPUT2
Output a table or matrix into a FORTRAN readable file
Entry
Point
Description
IREAD Supplies data to the calling program in a logical (as opposed to a
physical) manner.
Format:
CALL IREAD(IUN,ARRY,NARY,IMETH,NT,IRTN)
where IUN is as described in IOPEN.
ARRY is the array into which a record is transmitted.
NARY is an integer input that requests the number of words to be
transmitted. If NARY is zero, no words will be transmitted. If NARY is
negative, the words will be skipped but not transmitted. If (NARY is
greater than the number of words remaining, the remaining words are
processed (skipped or transmitted) and NT is set to this number and
IRTN is set to 1.
IMETH is an integer input that specifies how to proceed through the
logical record. If IMETH = 0, the current logical record is continuously
processed until an end-of-record return (IRTN =1) is given. If IMETH
= 1, the remaining data (if any) at the conclusion of IREAD, in the
current logical record, is skipped.
NT is an integer output value which contains the number of words
transmitted or skipped if IRTN is 1 on return from IREAD.
IRTN is an integer output value which indicates the status on return
from IREAD.
IRTN = 0 Normal return.
IRTN = 1 End of logical record hit while trying to process NARY
words.
IRTN = 2 End-of-file hit for this data block.
Method:
OUTPUT2 physical records are read into a buffer area. These records
are, at most, 2 * BUFFSIZE words long. The current position is
maintained and data is transmitted (or skipped) from the buffer to the
ARRY array. If the NX Nastran logical record spans several physical
FORTRAN records these are transparent (no end-of-record returns) to
the user.
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