Initial commit

1 files changed, 50 insertions, 0 deletions

diff --git a/sys/etc/gen/nmireadb.x b/sys/etc/gen/nmireadb.x
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index 00000000..c3c0f75e
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+++ b/sys/etc/gen/nmireadb.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include <nmi.h>
+
+# NMIREAD -- Read a block of data stored externally in NMI format.
+# Data is returned in the format of the local host machine.
+
+int procedure nmi_readb (fd, spp, maxelem)
+
+int	fd			#I input file
+bool	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_BOOL)
+	nelem  = EOF
+
+	if (pksize > maxelem * SZ_BOOL) {
+	    # 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_BOOL))
+		call nmiupkb (Memc[bp], spp, nelem, TY_BOOL)
+	    }
+
+	    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_BOOL))
+		call nmiupkb (spp, spp, nelem, TY_BOOL)
+	    }
+	}
+
+	return (nelem)
+end