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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.c,v 7.7 2021/07/12 06:36:49 mcalabre Exp $
*=============================================================================
*
* 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" using either fits_hdr2str() from CFITSIO
* if the DO_CFITSIO preprocessor is defined, or read directly using fgets()
* otherwise.
*
*---------------------------------------------------------------------------*/
#include <wcsconfig_tests.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if defined HAVE_CFITSIO && defined DO_CFITSIO
#include <fitsio.h>
#endif
#include <cpgplot.h>
#include <cpgsbox.h>
#include <wcshdr.h>
#include <wcs.h>
int main()
{
char infile[] = "pih.fits";
char devtyp[16], idents[3][80], nlcprm[1], opt[2];
int c0[] = {-1, -1, -1, -1, -1, -1, -1};
int i, ic, gcode[2], naxis[2], nkeyrec, nreject, nwcs, relax, status;
float blc[2], trc[2];
double cache[257][4], grid1[1], grid2[1], nldprm[1];
struct wcsprm *wcs;
nlfunc_t pgwcsl_;
#if defined HAVE_CFITSIO && defined DO_CFITSIO
char *header;
fitsfile *fptr;
#else
char keyrec[81], header[28801];
int gotend, j, k;
FILE *fptr;
#endif
// Set line buffering in case stdout is redirected to a file, otherwise
// stdout and stderr messages will be jumbled (stderr is unbuffered).
setvbuf(stdout, NULL, _IOLBF, 0);
printf("Testing WCSLIB parser for FITS image headers (tpih2.c)\n"
"------------------------------------------------------\n\n");
// Read in the FITS header, excluding COMMENT and HISTORY keyrecords.
#if defined HAVE_CFITSIO && defined DO_CFITSIO
status = 0;
if (fits_open_file(&fptr, infile, READONLY, &status)) {
fits_report_error(stderr, status);
return 1;
}
if (fits_hdr2str(fptr, 1, NULL, 0, &header, &nkeyrec, &status)) {
fits_report_error(stderr, status);
return 1;
}
fits_close_file(fptr, &status);
#else
if ((fptr = fopen(infile, "r")) == 0x0) {
printf("ERROR opening %s\n", infile);
return 1;
}
k = 0;
nkeyrec = 0;
gotend = 0;
for (j = 0; j < 10; j++) {
for (i = 0; i < 36; i++) {
if (fgets(keyrec, 81, fptr) == 0) {
break;
}
if (strncmp(keyrec, " ", 8) == 0) continue;
if (strncmp(keyrec, "COMMENT ", 8) == 0) continue;
if (strncmp(keyrec, "HISTORY ", 8) == 0) continue;
memcpy(header+k, keyrec, 80);
k += 80;
nkeyrec++;
if (strncmp(keyrec, "END ", 8) == 0) {
// An END keyrecord was read, but read the rest of the block.
gotend = 1;
}
}
if (gotend) break;
}
fclose(fptr);
#endif
fprintf(stderr, "Found %d non-comment header keyrecords.\n", nkeyrec);
relax = WCSHDR_all;
if ((status = wcspih(header, nkeyrec, relax, 2, &nreject, &nwcs, &wcs))) {
fprintf(stderr, "wcspih ERROR %d: %s.\n", status, wcs_errmsg[status]);
}
#if defined HAVE_CFITSIO && defined DO_CFITSIO
fits_free_memory(header, &status);
#endif
// Plot setup.
naxis[0] = 1024;
naxis[1] = 1024;
blc[0] = 0.5f;
blc[1] = 0.5f;
trc[0] = naxis[0] + 0.5f;
trc[1] = naxis[1] + 0.5f;
strcpy(devtyp, "/NULL");
cpgbeg(0, devtyp, 1, 1);
cpgvstd();
cpgwnad(0.0f, 1.0f, 0.0f, 1.0f);
cpgask(1);
cpgpage();
// Annotation.
strcpy(idents[0], "Right ascension");
strcpy(idents[1], "Declination");
opt[0] = 'G';
opt[1] = 'E';
// Compact lettering.
cpgsch(0.8f);
// Draw full grid lines.
cpgsci(1);
gcode[0] = 2;
gcode[1] = 2;
grid1[0] = 0.0;
grid2[0] = 0.0;
for (i = 0; i < nwcs; i++) {
if ((status = wcsset(wcs+i))) {
fprintf(stderr, "wcsset ERROR %d: %s.\n", status, wcs_errmsg[status]);
continue;
}
// Get WCSNAME out of the wcsprm struct.
strcpy(idents[2], (wcs+i)->wcsname);
printf("\n%s\n", idents[2]);
// Draw the celestial grid. The grid density is set for each world
// coordinate by specifying LABDEN = 1224.
ic = -1;
cpgsbox(blc, trc, idents, opt, 0, 1224, c0, gcode, 0.0, 0, grid1, 0,
grid2, 0, pgwcsl_, 1, WCSLEN, 1, nlcprm, (int *)(wcs+i), nldprm, 256,
&ic, cache, &status);
// Draw the frame.
cpgbox("BC", 0.0f, 0, "BC", 0.0f, 0);
cpgpage();
}
status = wcsvfree(&nwcs, &wcs);
cpgask(0);
cpgend();
return 0;
}
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