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*=======================================================================
*
* WCSLIB 7.7 - an implementation of the FITS WCS standard.
* Copyright (C) 1995-2021, Mark Calabretta
*
* This file is part of WCSLIB.
*
* WCSLIB is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* WCSLIB is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with WCSLIB. If not, see http://www.gnu.org/licenses.
*
* Author: Mark Calabretta, Australia Telescope National Facility, CSIRO.
* http://www.atnf.csiro.au/people/Mark.Calabretta
* $Id: tpih2.f,v 7.7 2021/07/12 06:36:49 mcalabre Exp $
*=======================================================================
PROGRAM TPIH2
*-----------------------------------------------------------------------
*
* TPIH2 tests WCSPIH, the WCS FITS parser for image headers, by reading
* a test header and using PGSBOX to plot coordinate graticules for the
* resulting WCSPRM structs.
*
* Input comes from file 'pih.fits'.
*
* WCSP, which is meant to hold an address, is declared as an INTEGER
* array of length 2 to accomodate 64-bit machines for which
* sizeof(void *) = 2*sizeof(int).
*-----------------------------------------------------------------------
LOGICAL GOTEND
INTEGER C0(7), GCODE(2), I, IC, IERR, J, K, NAXIS(2),
: NKEYRC, NREJECT, NWCS, RELAX, WCSP(2)
REAL BLC(2), TRC(2)
DOUBLE PRECISION CACHE(4,0:256), NLDPRM(8)
CHARACTER KEYREC*80, DEVTYP*16, HEADER*28801, IDENTS(3)*80,
: INFILE*9, NLCPRM(1)*1, OPT(2)*1, WCSNAME*72
* On some systems, such as Sun Sparc, the struct MUST be aligned
* on a double precision boundary, done here using an equivalence.
* Failure to do this may result in mysterious "bus errors".
INCLUDE 'wcshdr.inc'
INCLUDE 'wcs.inc'
INTEGER WCS(WCSLEN)
DOUBLE PRECISION DUMMY
EQUIVALENCE (WCS,DUMMY)
EXTERNAL PGWCSL
DATA INFILE /'pih.fits'/
DATA C0 /7*-1/
*-----------------------------------------------------------------------
WRITE (*, 10)
10 FORMAT (
: 'Testing WCSLIB parser for FITS image headers (tpih2.f)',/,
: '------------------------------------------------------',/)
* Open the FITS WCS test header for formatted, direct I/O.
OPEN (UNIT=1, FILE=INFILE, FORM='FORMATTED', ACCESS='DIRECT',
: RECL=80, IOSTAT=IERR)
IF (IERR.NE.0) THEN
WRITE (*, 20) IERR, INFILE
20 FORMAT ('ERROR',I3,' opening ',A)
GO TO 999
END IF
* Read in the FITS header, excluding COMMENT and HISTORY keyrecords.
K = 1
NKEYRC = 0
GOTEND = .FALSE.
DO 50 J = 0, 100
DO 40 I = 1, 36
READ (1, '(A80)', REC=36*J+I, IOSTAT=IERR) KEYREC
IF (IERR.NE.0) THEN
WRITE (*, 30) IERR
30 FORMAT ('ERROR',I3,' reading header.')
GO TO 999
END IF
IF (KEYREC(:8).EQ.' ') GO TO 40
IF (KEYREC(:8).EQ.'COMMENT ') GO TO 40
IF (KEYREC(:8).EQ.'HISTORY ') GO TO 40
HEADER(K:) = KEYREC
K = K + 80
NKEYRC = NKEYRC + 1
IF (KEYREC(:8).EQ.'END ') THEN
* An END keyrecord was read, read the rest of the block.
GOTEND = .TRUE.
END IF
40 CONTINUE
IF (GOTEND) GO TO 60
50 CONTINUE
60 CLOSE (UNIT=1)
HEADER(K:K) = CHAR (0)
WRITE (*, 70) NKEYRC
70 FORMAT ('Found',I4,' non-comment header keyrecords.')
* WCSPIH will allocate memory for an array of NWCS intialized WCSPRM
* structs. This array will be returned via a "pointer", WCSP, that
* may be passed to WCSVCOPY to extract a particular struct.
RELAX = WCSHDR_all
IERR = WCSPIH (HEADER, NKEYRC, RELAX, 3, NREJECT, NWCS, WCSP)
IF (IERR.NE.0) THEN
WRITE (*, 80) IERR
80 FORMAT ('WCSPIH ERROR',I2,'.')
GO TO 999
END IF
* Plot setup.
NAXIS(1) = 1024
NAXIS(2) = 1024
BLC(1) = 0.5
BLC(2) = 0.5
TRC(1) = NAXIS(1) + 0.5
TRC(2) = NAXIS(2) + 0.5
DEVTYP = '/NULL'
CALL PGBEG(0, DEVTYP, 1, 1)
CALL PGVSTD()
CALL PGWNAD(0.0, 1.0, 0.0, 1.0)
CALL PGASK(1)
CALL PGPAGE()
* Annotation.
IDENTS(1) = 'Right ascension'
IDENTS(2) = 'Declination'
OPT(1) = 'G'
OPT(2) = 'E'
* Compact lettering.
CALL PGSCH(0.8)
* Draw full grid lines.
CALL PGSCI(1)
GCODE(1) = 2
GCODE(2) = 2
DO 100 I = 0, NWCS-1
* Copy into our WCSPRM struct.
IERR = WCSVCOPY (WCSP, I, WCS)
IERR = WCSSET (WCS)
IF (IERR.NE.0) THEN
WRITE (*, 90) IERR
90 FORMAT ('WCSSET ERROR',I2,'.')
GO TO 999
END IF
* Get WCSNAME out of the WCSPRM struct.
IERR = WCSGTC (WCS, WCS_WCSNAME, WCSNAME)
IDENTS(3) = WCSNAME
WRITE (*, '(/,A)') WCSNAME
* Draw the celestial grid. The grid density is set for each
* world coordinate by specifying LABDEN = 1224.
IC = -1
CALL PGSBOX(BLC, TRC, IDENTS, OPT, 0, 1224, C0, GCODE, 0D0, 0,
: 0D0, 0, 0D0, 0, PGWCSL, 1, WCSLEN, 1, NLCPRM, WCS, NLDPRM,
: 256, IC, CACHE, IERR)
* Draw the frame.
CALL PGBOX('BC', 0.0, 0, 'BC', 0.0, 0)
CALL PGPAGE()
* Free memory (doesn't free memory allocated by WCSPIH).
IERR = WCSFREE (WCS)
100 CONTINUE
* Free the memory allocated by WCSPIH.
IERR = WCSVFREE (NWCS, WCSP)
999 CONTINUE
END
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