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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <nmi.h>
# NMI_READ -- Read a block of data stored externally in NMI format.
# Data is returned in the format of the local host machine.
int procedure nmi_reads (fd, spp, maxelem)
int fd #I input file
short spp[ARB] #O receives data
int maxelem # max number of data elements to be read
pointer sp, bp
int pksize, nchars, nelem
int nmipksize(), nminelem(), read()
errchk read()
long note()
begin
pksize = nmipksize (maxelem, NMI_SHORT)
nelem = EOF
if (pksize > maxelem * SZ_SHORT) {
# Read data into local buffer and unpack into user buffer.
call smark (sp)
call salloc (bp, pksize, TY_CHAR)
nchars = read (fd, Memc[bp], pksize)
if (nchars != EOF) {
nelem = min (maxelem, nminelem (nchars, NMI_SHORT))
call nmiupks (Memc[bp], spp, nelem, TY_SHORT)
}
call sfree (sp)
} else {
# Read data into user buffer and unpack in place.
nchars = read (fd, spp, pksize)
if (nchars != EOF) {
nelem = min (maxelem, nminelem (nchars, NMI_SHORT))
call nmiupks (spp, spp, nelem, TY_SHORT)
}
}
return (nelem)
end
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