fdds_prev - fetch previouse field tag within a DDS structure
SYNOPSIS
#include <fdds.h> (fixed-format sources)
#include <f90dds.h> (free-format sources)
integer fdds_prev(bin_tag, field_tag)
-
integer bin_tag
integer field_tag
DESCRIPTION
fdds_prev returns the tag associated with the field of the
previous member or object from the member or object defined by
field_tag within the current structure. A return value of
-1 indicates field_tag is the first member or object.
INPUT
bin_tag is the tag associated with an open binary, previously
obtained from fdds_open. It specifies a
particular binary stream.
field_tag is the tag associated with a particular field known
by bin_tag. A value of "0" always refers to the entire
trace field.
OUTPUT
The return value is the field tag associate with the desired object
or -1 if none found.
SEE ALSO
fdds_member Fetch field tag
fdds_object Fetch object tag
fdds_next Fetch next field tag
fdds_parent Fetch parent field tag
fdds_prime Fetch field prime tag
AUTHOR
Jerry Ehlers, BP America (May 2003)