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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <nmi.h>
# NMIREADC -- Read a block of character data stored externally in NMI format.
# Data is returned in the native machine character format.
int procedure nmi_readc (fd, spp, maxchars)
int fd # input file
int spp[ARB] # receives data
int maxchars # max number of chars to be read
pointer sp, bp
int pksize, nchars
int nmipksize(), nminelem(), read()
errchk read()
long note()
begin
pksize = nmipksize (maxchars, NMI_BYTE)
nchars = max (maxchars, pksize)
if (nchars > maxchars) {
# Read data into local buffer and unpack into user buffer.
call smark (sp)
call salloc (bp, nchars, TY_CHAR)
nchars = read (fd, Memc[bp], pksize)
if (nchars != EOF) {
nchars = min (maxchars, nminelem (nchars, NMI_BYTE))
call nmiupk8 (Memc[bp], spp, nchars, TY_CHAR)
}
call sfree (sp)
} else {
# Read data into user buffer and unpack in place.
nchars = read (fd, spp, pksize)
if (nchars != EOF) {
nchars = min (maxchars, nminelem (nchars, NMI_BYTE))
call nmiupk8 (spp, spp, nchars, TY_CHAR)
}
}
return (nchars)
end
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