Initial commit

1 files changed, 119 insertions, 0 deletions

diff --git a/noao/mtlocal/cyber/rrcopy/rcrheader.x b/noao/mtlocal/cyber/rrcopy/rcrheader.x
new file mode 100644
index 00000000..2187c6a1
--- /dev/null
+++ b/noao/mtlocal/cyber/rrcopy/rcrheader.x
@@ -0,0 +1,119 @@
+include	<mach.h>
+include	<imhdr.h>
+include	<error.h>
+include "rrcopy.h"
+
+# RC_READ_HEADER -- reads the IPPS header (64 60-bit words) as
+# a bit stream into consecutive elements of char array header. 
+# Any extraneous information between the header and data is skipped;
+# the tape is left positioned at the first data record.
+
+int procedure rc_header_read (rd, rp)
+
+int	rd
+pointer	rp
+char  	raw_header[SZ_HEADER], header[SZ_HEADER]
+int	nchars_to_skip, first_word
+int	rc_read_cyber()
+errchk	rc_header_unpk, rc_skip_chars, rc_read_cyber, rc_order_cyber_bits
+
+begin
+	if (rc_read_cyber (rd, raw_header, SZ_HEADER) == EOF)
+	    return (EOF)
+
+	first_word = 1
+	call rc_order_cyber_bits (raw_header, first_word, header, LEN_PRU)
+
+	# Unpack bit stream and fill structure rp
+	iferr {
+	    call rc_header_unpk (header, rp)
+	    nchars_to_skip = (PRU_ROW_ONE(rp) - 1) * NBITS_PRU / NBITS_CHAR
+	} then {
+	    call erract (EA_WARN)
+	    # Position to first row of raster before posting error
+	    if (nchars_to_skip > 0)
+	        call rc_skip_chars (rd, nchars_to_skip)
+	    call error (1, "Bad header, attempting to skip raster")
+	}
+
+	# Position to first row of IPPS raster
+	if (nchars_to_skip > 0)
+	    call rc_skip_chars (rd, nchars_to_skip)
+
+	return (OK)
+end
+
+
+# RC_LIST_HEADER -- prints the RCOPY header information.
+
+procedure rc_list_header (rp, raster_num)
+
+pointer	rp
+int	raster_num
+
+begin
+        # Print header information from rcopy tape
+	call printf ("[%d]%7t IPPS_ID: %s\n")
+	    call pargi (raster_num)
+	    call pargstr (IPPS_ID(rp))
+	call printf ("%7t NCOLS=%d, NROWS=%d, MIN=%g, MAX=%g, NBPP=%d\n")
+	    call pargi (NCOLS(rp))
+	    call pargi (NROWS(rp))
+	    call pargr (DATA_MIN(rp))
+	    call pargr (DATA_MAX(rp))
+	    call pargi (BITS_PIXEL(rp))
+end
+
+
+# RC_UNPACK_HEADER -- unpacks header words from the char array header
+# and fills the RCOPY data structure.   A few values are checked to
+# make sure a valid IPPS raster is being read.  Offsets to various
+# header words have been defined previously.
+
+procedure rc_header_unpk (header, rp)
+
+char 	header[SZ_HEADER]
+pointer	rp
+
+begin
+	# From the reordered array, first the ID is unpacked
+	call rc_up_id (header, IPPS_ID(rp))
+
+	# An EOR marker terminates each raster
+	call rc_up_60i (header, EOR_OFFSET, PRU_EOR(rp), 1)
+
+	# The PRU containing the first data row
+	call rc_up_60i (header, FIRST_PRU_OFFSET, PRU_ROW_ONE(rp), 1)
+
+	# Most significant 30 bits of the data min are used
+	call rc_up_60r (header, MIN_OFFSET, DATA_MIN(rp), 1)
+
+	# Most significant 30 bits of the data max are used
+	call rc_up_60r (header, MAX_OFFSET, DATA_MAX(rp), 1)
+
+	# Bits per pixel is unpacked and tested
+	call rc_up_60i (header, DATA_TYPE_OFFSET, BITS_PIXEL(rp), 1)
+
+	switch (BITS_PIXEL(rp)) {
+	case 12,20,30,60:
+	    ;
+	default:
+	    call error (2, "Incorrect IPPS BITS_PIXEL")
+	}
+
+	# Number of columns is unpacked and tested
+	call rc_up_60i (header, NCOLS_OFFSET, NCOLS(rp), 1)
+	if (NCOLS(rp) <= 0)
+	    call error (2, "IPPS ncols <= 0")
+
+	# Number of Cyber words per row must be integral # of PRU's
+	call rc_up_60i (header, NWORDS_OFFSET, WRDS_PER_ROW(rp), 1)
+
+	if (mod (WRDS_PER_ROW(rp), LEN_PRU) != 0)
+	    call error (2, "Invalid IPPS NWPR")
+
+	# Number of rows is unpacked and tested
+	call rc_up_60i (header, NROWS_OFFSET, NROWS(rp), 1)
+	if (NROWS(rp) <= 0)
+	    call error (2, "IPPS nrows <= 0")
+end