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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <mach.h>
include <imhdr.h>
include <fio.h>
include "imfort.h"
include "oif.h"
# IMCREX -- Create a new image of the indicated size and pixel type.
# Both the header and pixel file are created at the same time. For
# simplicity we put both files in the same directory. The name of the
# pixel file is the same as that of the header file, but with the
# extension ".pix".
procedure imcrex (image, axlen, naxis, pixtype, ier)
char image[ARB] #I HOST filename of image
int axlen[IM_MAXDIM] #I axis lengths
int naxis #I number of axes
int pixtype #I pixel type
int ier #O receives error status
int fp, status, ip, i
long pfsize, clktime, cputime
pointer sp, hdrfile, pixfile, osfn, root, extn, sval, im
pointer bfopnx()
int imwrhdr(), ctoi()
define done_ 91
define operr_ 92
errchk calloc
begin
call smark (sp)
call salloc (hdrfile, SZ_FNAME, TY_CHAR)
call salloc (pixfile, SZ_PATHNAME, TY_CHAR)
call salloc (osfn, SZ_PATHNAME, TY_CHAR)
call salloc (root, SZ_FNAME, TY_CHAR)
call salloc (extn, SZ_FNAME, TY_CHAR)
call salloc (sval, SZ_FNAME, TY_CHAR)
# Verify image size and datatype operands.
ier = OK
if (naxis < 1 || naxis > MAX_NAXIS)
ier = IE_NAXIS
if (ier == OK)
do i = 1, naxis
if (axlen[i] < 1)
ier = IE_AXLEN
if (ier == OK)
if (pixtype != TY_SHORT && pixtype != TY_REAL)
ier = IE_PIXTYPE
if (ier != OK) {
call im_seterrop (ier, image)
goto done_
}
# Construct the name of the image header file.
call imf_parse (image, Memc[root], Memc[extn])
if (Memc[extn] == EOS)
call strcpy (OIF_HDREXTN, Memc[extn], SZ_FNAME)
call strcpy (Memc[root], Memc[hdrfile], SZ_FNAME)
call strcat (".", Memc[hdrfile], SZ_FNAME)
call strcat (Memc[extn], Memc[hdrfile], SZ_FNAME)
# Check to see if the new image would overwrite an existing one.
# This is an error, unless "clobber" is defined in the user
# environment.
call strpak (Memc[hdrfile], Memc[osfn], SZ_PATHNAME)
call zfacss (Memc[osfn], 0, 0, status)
if (status == YES) {
call strpak ("clobber", Memc[sval], SZ_FNAME)
call zgtenv (Memc[sval], Memc[sval], SZ_FNAME, status)
if (status != ERR) {
call imdelx (image, ier)
if (ier != OK) {
ier = IE_CREHDR
goto operr_
}
} else {
ier = IE_CLOBBER
goto operr_
}
}
# Create the new image.
fp = bfopnx (Memc[hdrfile], NF, RANDOM)
if (fp == ERR) {
ier = IE_CREHDR
operr_ call sfree (sp)
call im_seterrop (ier, Memc[hdrfile])
return
}
# Allocate and initialize the image header.
call calloc (im, LEN_IMDES + LEN_IMHDR, TY_STRUCT)
call zgtime (clktime, cputime)
call strcpy ("imhdr", IM_MAGIC(im), SZ_IMMAGIC)
call amovi (axlen, IM_LEN(im,1), naxis)
IM_ACMODE(im) = NEW_IMAGE
IM_NDIM(im) = naxis
IM_PIXTYPE(im) = pixtype
IM_HDRLEN(im) = LEN_IMHDR
IM_CTIME(im) = clktime
IM_MTIME(im) = clktime
Memc[IM_USERAREA(im)] = EOS
call imf_initoffsets (im, SZ_DEVBLK)
pfsize = IM_HGMOFF(im) - 1
# Get the image format version for new images.
call strpak (ENV_OIFVER, Memc[sval], SZ_FNAME)
call zgtenv (Memc[sval], Memc[sval], SZ_FNAME, status)
if (status != ERR) {
ip = 1
call strupk (Memc[sval], Memc[sval], SZ_FNAME)
if (ctoi (Memc[sval], ip, IM_HDRVER(im)) <= 0)
IM_HDRVER(im) = DEF_VERSION
} else
IM_HDRVER(im) = DEF_VERSION
# Get a unique pixel file name.
call aclrc (IM_HDRFILE(im), SZ_IMHDRFILE)
call strcpy (Memc[hdrfile], IM_HDRFILE(im), SZ_IMHDRFILE)
call imf_mkpixfname (im, Memc[pixfile], SZ_IMPIXFILE, ier)
if (ier != OK)
goto done_
# Write the image header and close the header file.
if (imwrhdr (fp, im, TY_IMHDR) == ERR) {
call bfclos (fp, status)
status = ERR
} else
call bfclos (fp, status)
if (status == ERR) {
ier = IE_WRHDR
call im_seterrop (ier, Memc[hdrfile])
return
}
# Create the pixel storage file.
call bfalcx (Memc[pixfile], pfsize, status)
if (status == ERR) {
ier = IE_ALCPIX
call im_seterrop (ier, Memc[pixfile])
goto done_
}
# Write the backpointing pixel header into the pixel file.
fp = bfopnx (Memc[pixfile], WO, RANDOM)
if (fp == ERR) {
status = ERR
} else if (imwrhdr (fp, im, TY_PIXHDR) == ERR) {
call bfclos (fp, status)
status = ERR
} else
call bfclos (fp, status)
call mfree (im, TY_STRUCT)
if (status == ERR) {
ier = IE_ACCPIX
call im_seterrop (ier, Memc[pixfile])
} else
ier = OK
done_
call sfree (sp)
end
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