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;
strncpy(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
free(header);
#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, "/XWINDOW");
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);
return 0;
}
int main()
{
char *header;
int i, nkeyrec, nreject, nwcs, stat[NWCSFIX], status = 0;
fitsfile *fptr;
struct wcsprm *wcs;
/* 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 -TAB interpreter (twcstab.c)\n"
"------------------------------------\n\n");
/* Create the input FITS test file. */
if (create_input()) {
fprintf(stderr, "Failed to create FITS test file.");
return 1;
}
/* Open the FITS test file and read the primary header. */
fits_open_file(&fptr, "wcstab.fits", READONLY, &status);
if ((status = fits_hdr2str(fptr, 1, NULL, 0, &header, &nkeyrec,
&status))) {
fits_report_error(stderr, status);
return 1;
}
/*-----------------------------------------------------------------------*/
/* Basic steps required to interpret a FITS WCS header, including -TAB. */
/*-----------------------------------------------------------------------*/
/* Parse the primary header of the FITS file. */
if ((status = wcspih(header, nkeyrec, WCSHDR_all, 2, &nreject, &nwcs,
&wcs))) {
fprintf(stderr, "wcspih ERROR %d: %s.\n", status,wcshdr_errmsg[status]);
}
/* Read coordinate arrays from the binary table extension. */
if ((status = fits_read_wcstab(fptr, wcs->nwtb, (wtbarr *)wcs->wtb,
&status))) {
fits_report_error(stderr, status);
return 1;
}
/* Translate non-standard WCS keyvalues. */
if ((status = wcsfix(7, 0, wcs, stat))) {
for (i = 0; i < NWCSFIX; i++) {
if (stat[i] > 0) {
fprintf(stderr, "wcsfix ERROR %d: %s.\n", status,
wcsfix_errmsg[stat[i]]);
}
}
return 1;
}
/*-----------------------------------------------------------------------*/
/* The wcsprm struct is now ready for use. */
/*-----------------------------------------------------------------------*/
/* Do something with it. */
do_wcs_stuff(fptr, wcs);
/* Finished with the FITS file. */
fits_close_file(fptr, &status);
free(header);
/* Clean up. */
status = wcsvfree(&nwcs, &wcs);
return 0;
}
int main(int argc, char **argv)
{
char alt = ' ', *header, idents[3][80], *infile;
int alts[27], c, dofix = 0, doprt = 0, dopix = 0, doworld = 0, hdunum = 1,
hdutype, i, j, nelem, nkeyrec, nreject, nwcs, *stat = 0x0, status;
double *imgcrd = 0x0, phi, *pixcrd = 0x0, theta, *world = 0x0;
struct wcsprm *wcs;
fitsfile *fptr;
/* Parse options. */
for (i = 1; i < argc && argv[i][0] == '-'; i++) {
if (!argv[i][1]) break;
switch (argv[i][1]) {
case 'a':
alt = toupper(argv[i][2]);
break;
case 'f':
dofix = 1;
break;
case 'h':
hdunum = atoi(argv[i]+2);
break;
case 'p':
doprt = 1;
break;
case 'x':
dopix = 1;
break;
case 'w':
doworld = 1;
break;
default:
fprintf(stderr, "%s", usage);
return 1;
}
}
if (i < argc) {
infile = argv[i++];
if (i < argc) {
fprintf(stderr, "%s", usage);
return 1;
}
} else {
infile = "-";
}
/* Check accessibility of the input file. */
if (strcmp(infile, "-") && access(infile, R_OK) == -1) {
printf("wcsware: Cannot access %s.\n", infile);
return 1;
}
if (!dopix && !doworld) doprt = 1;
/* Open the FITS file and move to the required HDU. */
status = 0;
if (fits_open_file(&fptr, infile, READONLY, &status)) goto fitserr;
if (fits_movabs_hdu(fptr, hdunum, &hdutype, &status)) goto fitserr;
if (hdutype != IMAGE_HDU) {
fprintf(stderr, "ERROR, HDU number %d does not contain an image array.\n",
hdunum);
return 1;
}
/* Read in the FITS header, excluding COMMENT and HISTORY keyrecords. */
if (fits_hdr2str(fptr, 1, NULL, 0, &header, &nkeyrec, &status)) {
goto fitserr;
}
/* Interpret the WCS keywords. */
if ((status = wcspih(header, nkeyrec, WCSHDR_all, -3, &nreject, &nwcs,
&wcs))) {
fprintf(stderr, "wcspih ERROR %d: %s.\n", status, wcshdr_errmsg[status]);
return 1;
}
free(header);
if (wcs == 0x0) {
fprintf(stderr, "No world coordinate systems found.\n");
return 1;
}
/* Read -TAB arrays from the binary table extension (if necessary). */
if (fits_read_wcstab(fptr, wcs->nwtb, (wtbarr *)wcs->wtb, &status)) {
goto fitserr;
}
fits_close_file(fptr, &status);
/* Translate non-standard WCS keyvalues? */
if (dofix) {
stat = malloc(NWCSFIX * sizeof(int));
if ((status = wcsfix(7, 0, wcs, stat))) {
for (i = 0; i < NWCSFIX; i++) {
if (stat[i] > 0) {
fprintf(stderr, "wcsfix ERROR %d: %s.\n", status,
wcsfix_errmsg[stat[i]]);
}
}
return 1;
}
}
/* Sort out alternates. */
if (alt) {
wcsidx(nwcs, &wcs, alts);
if (alt == ' ') {
if (alts[0] == -1) {
fprintf(stderr, "WARNING, no primary coordinate representation.\n");
alt = '\0';
}
} else if (alt < 'A' || alt > 'Z') {
fprintf(stderr, "WARNING, alternate specifier \"%c\" is invalid.\n",
alt);
alt = '\0';
} else {
if (alts[alt - 'A' + 1] == -1) {
fprintf(stderr, "WARNING, no alternate coordinate representation "
"\"%c\".\n", alt);
alt = '\0';
}
}
}
/* Initialize and possibly print the structs. */
for (i = 0; i < nwcs; i++) {
if (alt && (wcs+i)->alt[0] != alt) {
continue;
} else if (i) {
printf("\nType <CR> for next: ");
fgetc(stdin);
}
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);
if (strlen(idents[2])) {
printf("\n%s\n", idents[2]);
}
/* Print the struct. */
if (doprt) {
wcsprt(wcs+i);
}
/* Transform coordinates? */
if (dopix || doworld) {
nelem = (wcs+i)->naxis;
world = realloc(world, nelem * sizeof(double));
imgcrd = realloc(imgcrd, nelem * sizeof(double));
pixcrd = realloc(pixcrd, nelem * sizeof(double));
stat = realloc(stat, nelem * sizeof(int));
if (dopix) {
/* Transform pixel coordinates. */
while (1) {
printf("\nEnter %d pixel coordinate element%s: ", nelem,
(nelem==1)?"":"s");
c = fgetc(stdin);
if (c == EOF || c == '\n') {
if (c == EOF) printf("\n");
break;
}
ungetc(c, stdin);
scanf("%lf", pixcrd);
for (j = 1; j < nelem; j++) {
scanf("%*[ ,]%lf", pixcrd+j);
}
while (fgetc(stdin) != '\n');
printf("Pixel: ");
for (j = 0; j < nelem; j++) {
printf("%s%14.9g", j?", ":"", pixcrd[j]);
}
if ((status = wcsp2s(wcs+i, 1, nelem, pixcrd, imgcrd, &phi, &theta,
world, stat))) {
fprintf(stderr, "wcsp2s ERROR %d: %s.\n", status,
wcs_errmsg[status]);
} else {
printf("\nImage: ");
for (j = 0; j < nelem; j++) {
if (j == (wcs+i)->lng || j == (wcs+i)->lat) {
/* Print angles in fixed format. */
printf("%s%14.6f", j?", ":"", imgcrd[j]);
} else {
printf("%s%14.9g", j?", ":"", imgcrd[j]);
}
}
printf("\nWorld: ");
for (j = 0; j < nelem; j++) {
if (j == (wcs+i)->lng || j == (wcs+i)->lat) {
/* Print angles in fixed format. */
printf("%s%14.6f", j?", ":"", world[j]);
} else {
printf("%s%14.9g", j?", ":"", world[j]);
}
}
printf("\n");
}
}
}
if (doworld) {
/* Transform world coordinates. */
while (1) {
printf("\nEnter %d world coordinate element%s: ", nelem,
(nelem==1)?"":"s");
c = fgetc(stdin);
if (c == EOF || c == '\n') {
if (c == EOF) printf("\n");
break;
}
ungetc(c, stdin);
scanf("%lf", world);
for (j = 1; j < nelem; j++) {
scanf("%*[ ,]%lf", world+j);
}
while (fgetc(stdin) != '\n');
printf("World: ");
for (j = 0; j < nelem; j++) {
if (j == (wcs+i)->lng || j == (wcs+i)->lat) {
/* Print angles in fixed format. */
printf("%s%14.6f", j?", ":"", world[j]);
} else {
printf("%s%14.9g", j?", ":"", world[j]);
}
}
if ((status = wcss2p(wcs+i, 1, nelem, world, &phi, &theta, imgcrd,
pixcrd, stat))) {
fprintf(stderr, "wcss2p ERROR %d: %s.\n", status,
wcs_errmsg[status]);
} else {
printf("\nImage: ");
for (j = 0; j < nelem; j++) {
if (j == (wcs+i)->lng || j == (wcs+i)->lat) {
/* Print angles in fixed format. */
printf("%s%14.6f", j?", ":"", imgcrd[j]);
} else {
printf("%s%14.9g", j?", ":"", imgcrd[j]);
}
}
printf("\nPixel: ");
for (j = 0; j < nelem; j++) {
printf("%s%14.9g", j?", ":"", pixcrd[j]);
}
printf("\n");
}
}
}
}
}
status = wcsvfree(&nwcs, &wcs);
return 0;
fitserr:
fits_report_error(stderr, status);
fits_close_file(fptr, &status);
return 1;
}
int main(int argc, char *argv[])
{
char *infile = "TPV7.fits";
char keyrec[81], header[288001], *disfn;
int dopoly, gotend, iblock, ikeyrec, inc, itest, j, k, n, naxis[2], naxis1,
naxis2, nClosure, nFail, nkeyrec, nsamp, nreject, nTest, nwcs, p1, p2,
status;
clock_t t0, tp2x, tx2p;
double absmax, dp1, dp2, *img, *img1, *img2, pix[8], pixblc[2], pixsamp[2],
pixtrc[2], px, *px0, *px1, pxi[8], rel, resid, relmax;
double *avgdis, *avgtot, *maxdis, *maxtot, *rmsdis, *rmstot, stats[9];
FILE *fptr;
struct linprm affine, *lin, *linpol, *lintpv;
struct wcsprm *wcs, wcspol;
wcserr_enable(1);
wcsprintf_set(stdout);
/* 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);
wcsprintf("Testing closure of WCSLIB distortion routines (tdis1.c)\n"
"-------------------------------------------------------\n");
/* List status return messages. */
wcsprintf("\nList of dis status return values:\n");
for (status = 1; status <= 5; status++) {
wcsprintf("%4d: %s.\n", status, dis_errmsg[status]);
}
wcsprintf("\n");
/* Optional file name specified? */
if (1 < argc) {
infile = argv[1];
}
/* Read in the FITS header, excluding COMMENT and HISTORY keyrecords. */
if ((fptr = fopen(infile, "r")) == 0) {
wcsprintf("ERROR opening %s\n", infile);
return 1;
}
memset(naxis, 0, 2*sizeof(int));
k = 0;
nkeyrec = 0;
gotend = 0;
for (iblock = 0; iblock < 100; iblock++) {
for (ikeyrec = 0; ikeyrec < 36; ikeyrec++) {
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;
if (strncmp(keyrec, "NAXIS", 5) == 0) {
if (keyrec[5] == ' ') {
sscanf(keyrec+10, "%d", &n);
if (n != 2) {
wcsprintf("ERROR, expecting a 2D image.\n");
return 1;
}
continue;
}
sscanf(keyrec+5, "%d = %d", &j, &n);
naxis[j-1] = n;
continue;
}
strncpy(header+k, keyrec, 80);
k += 80;
nkeyrec++;
if (strncmp(keyrec, "END ", 10) == 0) {
/* An END keyrecord was read, but read the rest of the block. */
gotend = 1;
}
}
if (gotend) break;
}
fclose(fptr);
/* Parse the header. */
if ((wcspih(header, nkeyrec, WCSHDR_none, 2, &nreject, &nwcs, &wcs))) {
wcsperr(wcs, 0x0);
return 1;
}
/* Is it TPV? */
dopoly = 0;
if (strcmp(wcs->ctype[0], "RA---TPV") == 0) {
/* Copy it and translate to Polynomial for later use. */
wcspol.flag = -1;
if (wcscopy(1, wcs, &wcspol)) {
wcsperr(wcs, 0x0);
return 1;
}
/* Translate TPV to Polynomial. */
tpv2poly(&wcspol);
wcspol.flag = -1;
if (wcsset(&wcspol)) {
wcsperr(&wcspol, 0x0);
return 1;
}
dopoly = 1;
}
/* wcsset() translates the TPV "projection" into a sequent distortion. */
if (wcsset(wcs)) {
wcsperr(wcs, 0x0);
return 1;
}
/* Henceforth, we will work with linprm. */
lin = &(wcs->lin);
/* Get statistics on the distortion in the inner quarter of the image. */
maxdis = stats;
maxtot = maxdis + 2;
avgdis = maxtot + 1;
avgtot = avgdis + 2;
rmsdis = avgtot + 1;
rmstot = rmsdis + 2;
pixblc[0] = 0.25 * naxis[0];
pixblc[1] = 0.25 * naxis[1];
pixtrc[0] = 0.75 * naxis[0];
pixtrc[1] = 0.75 * naxis[1];
pixsamp[0] = (pixtrc[0] - pixblc[0])/512.0;
pixsamp[1] = (pixtrc[1] - pixblc[1])/512.0;
if (pixsamp[0] < 1.0) pixsamp[0] = 1.0;
if (pixsamp[1] < 1.0) pixsamp[1] = 1.0;
if (linwarp(lin, pixblc, pixtrc, pixsamp, &nsamp,
maxdis, maxtot, avgdis, avgtot, rmsdis, rmstot)) {
linperr(lin, 0x0);
return 1;
}
for (k = 0; k < 9; k++) {
if (fabs(stats[k]) < 0.0005) stats[k] = 0.0;
}
wcsprintf("linwarp() statistics computed over %d sample points:\n"
" Max distortion, axis 1: %8.3f pixels\n"
" axis 2: %8.3f pixels\n"
" total: %8.3f pixels\n"
" Mean distortion, axis 1: %8.3f pixels\n"
" axis 2: %8.3f pixels\n"
" total: %8.3f pixels\n"
" RMS distortion, axis 1: %8.3f pixels\n"
" axis 2: %8.3f pixels\n"
" total: %8.3f pixels\n",
nsamp, maxdis[0], maxdis[1], *maxtot,
avgdis[0], avgdis[1], *avgtot,
rmsdis[0], rmsdis[1], *rmstot);
if (lin->disseq) {
/* Exercise diswarp() as well. */
wcsprintf("\n");
/* Define a rectangle in intermediate pixel coordinates that just */
/* encompasses the inner quarter of the image. For this we need */
/* to switch off CDELTia scaling and all distortions. */
affine.flag = -1;
if ((status = lincpy(1, lin, &affine))) {
linperr(lin, 0x0);
return 1;
}
affine.cdelt[0] = 1.0;
affine.cdelt[1] = 1.0;
if ((status = (lindis(1, &affine, 0x0) ||
lindis(2, &affine, 0x0) ||
linset(&affine)))) {
linperr(&affine, 0x0);
return 1;
}
pix[0] = pixblc[0];
pix[1] = pixblc[1];
pix[2] = pixtrc[0];
pix[3] = pixblc[1];
pix[4] = pixtrc[0];
pix[5] = pixtrc[1];
pix[6] = pixblc[0];
pix[7] = pixtrc[1];
if (linp2x(&affine, 4, 2, pix, pxi)) {
linperr(&affine, 0x0);
return 1;
}
linfree(&affine);
pixblc[0] = pxi[0];
pixblc[1] = pxi[1];
pixtrc[0] = pxi[0];
pixtrc[1] = pxi[1];
k = 2;
for (j = 1; j < 4; j++) {
if (pixblc[0] > pxi[k]) pixblc[0] = pxi[k];
if (pixtrc[0] < pxi[k]) pixtrc[0] = pxi[k];
k++;
if (pixblc[1] > pxi[k]) pixblc[1] = pxi[k];
if (pixtrc[1] < pxi[k]) pixtrc[1] = pxi[k];
k++;
}
pixsamp[0] = (pixtrc[0] - pixblc[0])/512.0;
pixsamp[1] = (pixtrc[1] - pixblc[1])/512.0;
if (diswarp(lin->disseq, pixblc, pixtrc, pixsamp, &nsamp,
maxdis, maxtot, avgdis, avgtot, rmsdis, rmstot)) {
wcserr_prt(lin->disseq->err, 0x0);
return 1;
}
for (k = 0; k < 9; k++) {
if (fabs(stats[k]) < 0.0005) stats[k] = 0.0;
}
wcsprintf("diswarp() statistics computed over %d sample points:\n"
" Max distortion, axis 1: %8.3f units\n"
" axis 2: %8.3f units\n"
" total: %8.3f units\n"
" Mean distortion, axis 1: %8.3f units\n"
" axis 2: %8.3f units\n"
" total: %8.3f units\n"
" RMS distortion, axis 1: %8.3f units\n"
" axis 2: %8.3f units\n"
" total: %8.3f units\n",
nsamp, maxdis[0], maxdis[1], *maxtot,
avgdis[0], avgdis[1], *avgtot,
rmsdis[0], rmsdis[1], *rmstot);
}
/* The image size determines the test domain. */
if ((naxis1 = naxis[0]) == 0) {
naxis1 = 2*wcs->crpix[0] + 1;
}
if ((naxis2 = naxis[1]) == 0) {
naxis2 = 2*wcs->crpix[1] + 1;
}
/* Limit the number of tests. */
inc = 1;
while ((naxis1/inc)*(naxis2/inc) > 800000) {
inc *= 2;
}
n = naxis1 / inc;
px0 = calloc(4*(2*n), sizeof(double));
px1 = px0 + 2*n ;
img = px1 + 2*n ;
img1 = img;
img2 = img + 2*n;
for (itest = 0; itest < 2; itest++) {
if (itest) {
if (!dopoly) break;
lin = &(wcspol.lin);
}
if (lin->dispre) {
disfn = lin->dispre->dtype[0];
} else if (lin->disseq) {
disfn = lin->disseq->dtype[0];
}
wcsprintf("\n");
/* Now the closure test. */
tp2x = 0;
tx2p = 0;
nTest = 0;
nFail = 0;
nClosure = 0;
absmax = 0.0;
relmax = 0.0;
for (p2 = 1; p2 <= naxis2; p2 += inc) {
k = 0;
for (p1 = 1; p1 <= naxis1; p1 += inc) {
px0[k++] = (double)p1;
px0[k++] = (double)p2;
}
t0 = clock();
if (linp2x(lin, n, 2, px0, img)) {
linperr(lin, 0x0);
nFail = 1;
break;
}
tp2x += clock() - t0;
t0 = clock();
if (linx2p(lin, n, 2, img, px1)) {
linperr(lin, 0x0);
nFail = 1;
break;
}
tx2p += clock() - t0;
/* Check closure. */
k = 0;
for (k = 0; k < 2*n ; k += 2) {
dp1 = fabs(px1[k] - px0[k]);
dp2 = fabs(px1[k+1] - px0[k+1]);
resid = (dp1 > dp2) ? dp1 : dp2;
if (resid > absmax) absmax = resid;
if (resid > ATOL) {
nClosure++;
wcsprintf("Absolute closure error:\n");
wcsprintf(" pix: %18.12f %18.12f\n", px0[k], px0[k+1]);
wcsprintf(" -> img: %18.12f %18.12f\n", img[k], img[k+1]);
wcsprintf(" -> pix: %18.12f %18.12f\n", px1[k], px1[k+1]);
wcsprintf("\n");
continue;
}
resid = 0.0;
if ((px = fabs(px0[k])) > 1.0) resid = dp1/px;
if ((px = fabs(px0[k+1])) > 1.0) {
if ((rel = dp2/px) > resid) resid = rel;
}
if (resid > relmax) relmax = resid;
if (resid > FTOL) {
nClosure++;
wcsprintf("Relative closure error:\n");
wcsprintf(" pix: %18.12f %18.12f\n", px0[k], px0[k+1]);
wcsprintf(" -> img: %18.12f %18.12f\n", img[k], img[k+1]);
wcsprintf(" -> pix: %18.12f %18.12f\n", px1[k], px1[k+1]);
wcsprintf("\n");
}
}
nTest += n;
}
if (nFail) {
wcsprintf("\nFAIL: The %s test failed to complete.\n", disfn);
} else {
wcsprintf("linp2x/linx2p with %s distortions:\n"
" Completed %d closure tests.\n"
" Maximum absolute closure residual = %.2e pixel.\n"
" Maximum relative closure residual = %.2e.\n", disfn,
nTest, absmax, relmax);
wcsprintf("\n");
wcsprintf(" linp2x time (ns): %6.0f\n linx2p time (ns): %6.0f\n\n",
1.0e9*((double)tp2x/CLOCKS_PER_SEC)/nTest,
1.0e9*((double)tx2p/CLOCKS_PER_SEC)/nTest);
if (nClosure) {
wcsprintf("FAIL: %d closure residuals exceed reporting tolerance.\n",
nClosure);
} else {
wcsprintf("PASS: All %s closure residuals are within reporting "
"tolerance.\n", disfn);
}
}
}
/* Compare TPV with Polynomial over the test domain. */
if (dopoly) {
wcsprintf("\n");
nTest = 0;
nFail = 0;
absmax = 0.0;
lintpv = &(wcs->lin);
linpol = &(wcspol.lin);
for (p2 = 1; p2 <= naxis2; p2 += inc) {
k = 0;
for (p1 = 1; p1 <= naxis1; p1 += inc) {
px0[k++] = (double)p1;
px0[k++] = (double)p2;
}
if (linp2x(lintpv, n, 2, px0, img1)) {
linperr(lintpv, 0x0);
break;
}
if (linp2x(linpol, n, 2, px0, img2)) {
linperr(linpol, 0x0);
break;
}
/* Check agreement. */
k = 0;
for (k = 0; k < 2*n ; k += 2) {
dp1 = fabs(img2[k] - img1[k]);
dp2 = fabs(img2[k+1] - img1[k+1]);
resid = (dp1 > dp2) ? dp1 : dp2;
if (resid > absmax) absmax = resid;
if (resid > ATOL) {
nFail++;
wcsprintf("TPV - Polynomial disagreement:\n");
wcsprintf(" pix: %18.12f %18.12f\n", px0[k], px0[k+1]);
wcsprintf(" -> TPV: %18.12f %18.12f\n", img1[k], img1[k+1]);
wcsprintf(" -> Pol: %18.12f %18.12f\n", img2[k], img2[k+1]);
wcsprintf("\n");
continue;
}
}
nTest += n;
}
wcsprintf("linp2x, TPV vs Polynomial distortions:\n"
" Completed %d comparisons.\n"
" Maximum absolute disagreement = %.2e units.\n", nTest, absmax);
wcsprintf("\n");
if (nFail) {
wcsprintf("FAIL: %d comparisons exceed reporting tolerance.\n", nFail);
} else {
wcsprintf("PASS: All TPV vs Polynomial comparisons are within "
"reporting tolerance.\n");
}
}
free(px0);
wcsvfree(&nwcs, &wcs);
wcsfree(&wcspol);
return nFail || nClosure;
}
int main(int argc, char *argv[])
{
char *infile = "SIP.fits";
char keyrec[81], header[288001];
int axes[4], gotend, iblock, ikeyrec, j, k, n, naxis[4], nkeyrec, nreject,
nsamp, nsub, nwcs, status;
double pixblc[4], pixsamp[4], pixtrc[4];
double *avgdis, *avgtot, *maxdis, *maxtot, *rmsdis, *rmstot, stats[15];
FILE *fptr;
struct linprm *lin;
struct wcsprm *wcs, wcsext;
wcserr_enable(1);
wcsprintf_set(stdout);
/* 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);
wcsprintf("Testing wcssub() with distortions (tdis2.c)\n"
"-------------------------------------------\n");
/* Optional file name specified? */
if (1 < argc) {
infile = argv[1];
}
/* Read in the FITS header, excluding COMMENT and HISTORY keyrecords. */
if ((fptr = fopen(infile, "r")) == 0) {
wcsprintf("ERROR opening %s\n", infile);
return 1;
}
memset(naxis, 0, 2*sizeof(int));
k = 0;
nkeyrec = 0;
gotend = 0;
for (iblock = 0; iblock < 100; iblock++) {
for (ikeyrec = 0; ikeyrec < 36; ikeyrec++) {
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;
if (strncmp(keyrec, "NAXIS", 5) == 0) {
if (keyrec[5] == ' ') {
sscanf(keyrec+10, "%d", &n);
if (4 < n) {
wcsprintf("ERROR, can't handle more than 4 axes.\n");
return 1;
}
continue;
}
sscanf(keyrec+5, "%d = %d", &j, &n);
naxis[j-1] = n;
continue;
}
strncpy(header+k, keyrec, 80);
k += 80;
nkeyrec++;
if (strncmp(keyrec, "END ", 10) == 0) {
/* An END keyrecord was read, but read the rest of the block. */
gotend = 1;
}
}
if (gotend) break;
}
fclose(fptr);
/* Parse the header. */
if ((wcspih(header, nkeyrec, WCSHDR_none, 2, &nreject, &nwcs, &wcs))) {
wcsperr(wcs, 0x0);
return 1;
}
/* Extract the coordinate description for a transposed subimage and prepend
a new axis. Also tests wcssub() on a struct that hasn't been set up. */
nsub = 3;
axes[0] = 0;
axes[1] = WCSSUB_LATITUDE;
axes[2] = WCSSUB_LONGITUDE;
wcsext.flag = -1;
if ((status = wcssub(1, wcs, &nsub, axes, &wcsext))) {
wcsperr(&wcsext, "");
goto cleanup;
} else if (nsub == 0) {
printf("None of the requested subimage axes were found.\n");
goto cleanup;
}
/* Print the original and extracted structs. */
printf("\nInitial contents of wcsprm struct:\n");
if ((status = wcsset(wcs))) {
wcsperr(wcs, "");
goto cleanup;
};
wcsprt(wcs);
printf("\n\nExtracted contents of wcsprm struct:\n");
if ((status = wcsset(&wcsext))) {
wcsperr(&wcsext, "");
goto cleanup;
}
wcsprt(&wcsext);
/* Compute distortion statistics in the initial struct. */
maxdis = stats;
maxtot = maxdis + 4;
avgdis = maxtot + 1;
avgtot = avgdis + 4;
rmsdis = avgtot + 1;
rmstot = rmsdis + 4;
pixblc[0] = 1.0;
pixblc[1] = 1.0;
pixblc[2] = 1.0;
pixblc[3] = 1.0;
pixtrc[0] = 256.0;
pixtrc[1] = 256.0;
pixtrc[2] = 1.0;
pixtrc[3] = 1.0;
pixsamp[0] = 1.0;
pixsamp[1] = 1.0;
pixsamp[2] = 1.0;
pixsamp[3] = 1.0;
lin = &(wcs->lin);
if (linwarp(lin, pixblc, pixtrc, pixsamp, &nsamp,
maxdis, maxtot, avgdis, avgtot, rmsdis, rmstot)) {
linperr(lin, 0x0);
return 1;
}
for (k = 0; k < 12; k++) {
if (fabs(stats[k]) < 0.0005) stats[k] = 0.0;
}
wcsprintf("\n\n"
"Initial linwarp() statistics computed over %d sample points:\n"
" Max distortion, axis 1: %10.5f pixels\n"
" axis 2: %10.5f pixels\n"
" axis 3: %10.5f pixels\n"
" axis 4: %10.5f pixels\n"
" total: %10.5f pixels\n"
" Mean distortion, axis 1: %10.5f pixels\n"
" axis 2: %10.5f pixels\n"
" axis 3: %10.5f pixels\n"
" axis 4: %10.5f pixels\n"
" total: %10.5f pixels\n"
" RMS distortion, axis 1: %10.5f pixels\n"
" axis 2: %10.5f pixels\n"
" axis 3: %10.5f pixels\n"
" axis 4: %10.5f pixels\n"
" total: %10.5f pixels\n",
nsamp, maxdis[0], maxdis[1], maxdis[2], maxdis[3], *maxtot,
avgdis[0], avgdis[1], avgdis[2], avgdis[3], *avgtot,
rmsdis[0], rmsdis[1], rmsdis[2], rmsdis[3], *rmstot);
/* Compute distortion statistics in the extracted struct. */
pixtrc[0] = 1.0;
pixtrc[1] = 256.0;
pixtrc[2] = 256.0;
lin = &(wcsext.lin);
if (linwarp(lin, pixblc, pixtrc, pixsamp, &nsamp,
maxdis, maxtot, avgdis, avgtot, rmsdis, rmstot)) {
linperr(lin, 0x0);
return 1;
}
for (k = 0; k < 12; k++) {
if (fabs(stats[k]) < 0.0005) stats[k] = 0.0;
}
wcsprintf("\n"
"linwarp() statistics for extract computed over the same %d points:\n"
" Max distortion, axis 1: %10.5f pixels\n"
" axis 2: %10.5f pixels\n"
" axis 3: %10.5f pixels\n"
" total: %10.5f pixels\n"
" Mean distortion, axis 1: %10.5f pixels\n"
" axis 2: %10.5f pixels\n"
" axis 3: %10.5f pixels\n"
" total: %10.5f pixels\n"
" RMS distortion, axis 1: %10.5f pixels\n"
" axis 2: %10.5f pixels\n"
" axis 3: %10.5f pixels\n"
" total: %10.5f pixels\n",
nsamp, maxdis[0], maxdis[1], maxdis[2], *maxtot,
avgdis[0], avgdis[1], avgdis[2], *avgtot,
rmsdis[0], rmsdis[1], rmsdis[2], *rmstot);
cleanup:
wcsvfree(&nwcs, &wcs);
wcsfree(&wcsext);
return status;
}
int main()
{
char infile[] = "test.fits";
char text[80];
int i, j, k, ncards, nkeyids, nreject, status;
struct fitskey *keys, *kptr;
struct fitskeyid keyids[8];
#if defined HAVE_CFITSIO && defined DO_CFITSIO
char *header;
fitsfile *fptr;
#else
char card[81], header[288001];
int end;
FILE *fptr;
#endif
#ifdef DO_WCSHDR
struct wcsprm *wcs;
int ctrl, nwcs, relax;
#endif
printf("Testing FITS image header parser (tfitshdr.c)\n"
"---------------------------------------------\n\n");
/* Read in the FITS header. */
#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, 0, NULL, 0, &header, &ncards, &status)) {
fits_report_error(stderr, status);
return 1;
}
fits_close_file(fptr, &status);
#else
if ((fptr = fopen(infile, "r")) == 0) {
printf("ERROR opening %s\n", infile);
return 1;
}
k = 0;
end = 0;
ncards = 0;
for (j = 0; j < 100; j++) {
for (i = 0; i < 36; i++) {
if (fgets(card, 81, fptr) == 0) {
break;
}
strncpy(header+k, card, 80);
k += 80;
ncards++;
if (strncmp(card, "END ", 8) == 0) {
/* An END card was read, but read the rest of the block. */
end = 1;
}
}
if (end) break;
}
fclose(fptr);
#endif
printf("Found %d header cards.\n", ncards);
#ifdef DO_WCSHDR
/* Cull all recognized, syntactically valid WCS cards from the header. */
relax = WCSHDR_all;
ctrl = -1;
if (status = wcspih(header, ncards, relax, ctrl, &nreject, &nwcs, &wcs)) {
fprintf(stderr, "wcspih ERROR %d: %s.\n", status, wcs_errmsg[status]);
return 1;
}
/* Number remaining. */
ncards = strlen(header) / 80;
#endif
/* Specific keywords to be located or culled. */
strcpy(keyids[0].name, "SIMPLE ");
strcpy(keyids[1].name, "BITPIX ");
strcpy(keyids[2].name, "NAXIS ");
strcpy(keyids[3].name, "COMMENT ");
strcpy(keyids[4].name, "HISTORY ");
strcpy(keyids[5].name, " ");
strcpy(keyids[6].name, "END ");
nkeyids = 7;
if (nkeyids) {
printf("\nThe following cards will not be listed:\n");
for (i = 0; i < nkeyids; i++) {
printf(" \"%8s\"\n", keyids[i].name);
}
}
/* Parse the header. */
if (status = fitshdr(header, ncards, nkeyids, keyids, &nreject, &keys)) {
printf("fitskey ERROR %d: %s.\n", status, fitshdr_errmsg[status]);
}
#if defined HAVE_CFITSIO && defined DO_CFITSIO
free(header);
#endif
/* Report the results. */
printf("\n%d header cards parsed by fitshdr(), %d rejected:\n\n", ncards,
nreject);
kptr = keys;
for (i = 0; i < ncards; i++, kptr++) {
/* Skip syntactically valid cards that were indexed. */
if (kptr->keyno < 0 && !kptr->status) continue;
/* Basic card info. */
printf("%4d%5d %-8s%3d", kptr->keyno, kptr->status, kptr->keyword,
kptr->type);
/* Format the keyvalue for output. */
switch (abs(kptr->type)%10) {
case 1:
/* Logical. */
sprintf(text, "%c", kptr->keyvalue.i?'T':'F');
break;
case 2:
/* 32-bit signed integer. */
sprintf(text, "%d", kptr->keyvalue.i);
break;
case 3:
/* 64-bit signed integer. */
#ifdef WCS_INT64
sprintf(text, "%+Ld", kptr->keyvalue.k);
#else
if (kptr->keyvalue.k[2]) {
sprintf(text, "%+d%09d%09d", kptr->keyvalue.k[2],
abs(kptr->keyvalue.k[1]),
abs(kptr->keyvalue.k[0]));
} else {
sprintf(text, "%+d%09d", kptr->keyvalue.k[1],
abs(kptr->keyvalue.k[0]));
}
#endif
break;
case 4:
/* Very long integer. */
k = 0;
for (j = 7; j > 0; j--) {
if (kptr->keyvalue.l[j]) {
k = j;
break;
}
}
sprintf(text, "%+d", kptr->keyvalue.l[k]);
for (j = k-1; j >= 0; j--) {
sprintf(text+strlen(text), "%09d", abs(kptr->keyvalue.l[j]));
}
break;
case 5:
/* Float. */
sprintf(text, "%+13.6E", kptr->keyvalue.f);
break;
case 6:
/* Int complex. */
sprintf(text, "%.0f %.0f", kptr->keyvalue.c[0],
kptr->keyvalue.c[1]);
break;
case 7:
/* Float complex. */
sprintf(text, "%+13.6E %+13.6E", kptr->keyvalue.c[0],
kptr->keyvalue.c[1]);
break;
case 8:
/* String. */
sprintf(text, "\"%s\"", kptr->keyvalue.s);
break;
default:
/* No value. */
*text = '\0';
break;
}
if (kptr->type > 0) {
/* Keyvalue successfully extracted. */
printf(" %s", text);
} else if (kptr->type < 0) {
/* Syntax error of some type while extracting the keyvalue. */
printf(" (%s)", text);
}
/* Units? */
if (kptr->ulen) {
printf(" %.*s", kptr->ulen-2, kptr->comment+1);
}
/* Comment text or reject card. */
printf("\n%s\n", kptr->comment);
}
/* Print indexes. */
printf("\n\nIndexes of selected keywords:\n");
for (i = 0; i < nkeyids; i++) {
printf("%-8s%5d%5d%5d", keyids[i].name, keyids[i].count,
keyids[i].idx[0], keyids[i].idx[1]);
/* Print logical (SIMPLE) and integer (BITPIX, NAXIS) values. */
if (keyids[i].count) {
kptr = keys + keyids[i].idx[0];
printf("%4d", kptr->type);
if (kptr->type == 1) {
printf("%5c", kptr->keyvalue.i?'T':'F');
} else if (kptr->type == 2) {
printf("%5d", kptr->keyvalue.i);
}
}
printf("\n");
}
free(keys);
return 0;
}
int main(int argc, char **argv)
{
char alt = '\0', *header, idents[3][80], *infile, keyword[16], nlcprm[1],
opt[2], pgdev[16];
int c0[] = {-1, -1, -1, -1, -1, -1, -1};
int alts[27], gcode[2], hdunum = 1, hdutype, i, ic, naxes, naxis[2],
nkeyrec, nreject, nwcs, stat[NWCSFIX], status;
float blc[2], trc[2];
double cache[257][4], grid1[3], grid2[3], nldprm[1];
struct wcsprm *wcs;
nlfunc_t pgwcsl_;
fitsfile *fptr;
/* Parse options. */
strcpy(pgdev, "/XWINDOW");
for (i = 1; i < argc && argv[i][0] == '-'; i++) {
if (!argv[i][1]) break;
switch (argv[i][1]) {
case 'a':
alt = toupper(argv[i][2]);
break;
case 'd':
if (argv[i][2] == '?') {
cpgldev();
return 0;
}
if (argv[i][2] == '/') {
strncpy(pgdev+1, argv[i]+3, 15);
} else {
strncpy(pgdev+1, argv[i]+2, 15);
}
break;
case 'h':
hdunum = atoi(argv[i]+2);
break;
default:
fprintf(stderr, "%s", usage);
return 1;
}
}
if (i < argc) {
infile = argv[i++];
if (i < argc) {
fprintf(stderr, "%s", usage);
return 1;
}
} else {
infile = "-";
}
/* Check accessibility of the input file. */
if (strcmp(infile, "-") && access(infile, R_OK) == -1) {
printf("wcsgrid: Cannot access %s.\n", infile);
return 1;
}
/* Open the FITS file and move to the required HDU. */
status = 0;
if (fits_open_file(&fptr, infile, READONLY, &status)) goto fitserr;
if (fits_movabs_hdu(fptr, hdunum, &hdutype, &status)) goto fitserr;
if (hdutype != IMAGE_HDU) {
fprintf(stderr, "ERROR, HDU number %d does not contain an image array.\n",
hdunum);
return 1;
}
/* Check that we have at least two image axes. */
if (fits_read_key(fptr, TINT, "NAXIS", &naxes, NULL, &status)) {
goto fitserr;
}
if (naxes < 2) {
fprintf(stderr, "ERROR, HDU number %d does not contain a 2-D image.\n",
hdunum);
return 1;
} else if (naxes > 2) {
printf("HDU number %d contains a %d-D image array.\n", hdunum, naxes);
}
/* Read in the FITS header, excluding COMMENT and HISTORY keyrecords. */
if (fits_hdr2str(fptr, 1, NULL, 0, &header, &nkeyrec, &status)) {
goto fitserr;
}
/* Interpret the WCS keywords. */
if ((status = wcspih(header, nkeyrec, WCSHDR_all, -3, &nreject, &nwcs,
&wcs))) {
fprintf(stderr, "wcspih ERROR %d: %s.\n", status, wcshdr_errmsg[status]);
return 1;
}
free(header);
/* Read -TAB arrays from the binary table extension (if necessary). */
if (fits_read_wcstab(fptr, wcs->nwtb, (wtbarr *)wcs->wtb, &status)) {
goto fitserr;
}
/* Translate non-standard WCS keyvalues. */
if ((status = wcsfix(7, 0, wcs, stat))) {
status = 0;
for (i = 0; i < NWCSFIX; i++) {
if (stat[i] > 0) {
fprintf(stderr, "wcsfix ERROR %d: %s.\n", stat[i],
wcsfix_errmsg[stat[i]]);
/* Ignore problems with CDi_ja and DATE-OBS. */
if (!(i == CDFIX || i == DATFIX)) status = 1;
}
}
if (status) return 1;
}
/* Sort out alternates. */
if (alt) {
wcsidx(nwcs, &wcs, alts);
if (alt == ' ') {
if (alts[0] == -1) {
fprintf(stderr, "WARNING, no primary coordinate representation, "
"doing all.\n");
alt = '\0';
}
} else if (alt < 'A' || alt > 'Z') {
fprintf(stderr, "WARNING, alternate specifier \"%c\" is invalid, "
"doing all.\n", alt);
alt = '\0';
} else {
if (alts[alt - 'A' + 1] == -1) {
fprintf(stderr, "WARNING, no alternate coordinate representation "
"\"%c\", doing all.\n", alt);
alt = '\0';
}
}
}
/* Get image dimensions from the header. */
sprintf(keyword, "NAXIS%d", wcs->lng + 1);
fits_read_key(fptr, TINT, "NAXIS1", naxis, NULL, &status);
sprintf(keyword, "NAXIS%d", wcs->lat + 1);
fits_read_key(fptr, TINT, "NAXIS2", naxis+1, NULL, &status);
if ((naxis[0] < 2) || (naxis[1] < 2)) {
fprintf(stderr, "ERROR, HDU number %d contains degenerate image axes.\n",
hdunum);
return 1;
}
fits_close_file(fptr, &status);
/* Plot setup. */
blc[0] = 0.5f;
blc[1] = 0.5f;
trc[0] = naxis[0] + 0.5f;
trc[1] = naxis[1] + 0.5f;
if (cpgbeg(0, pgdev, 1, 1) != 1) {
fprintf(stderr, "ERROR, failed to open PGPLOT device %s.\n", pgdev);
return 1;
}
cpgvstd();
cpgwnad(blc[0], trc[0], blc[0], trc[1]);
cpgask(1);
cpgpage();
/* Compact lettering. */
cpgsch(0.8f);
/* Draw full grid lines. */
gcode[0] = 2;
gcode[1] = 2;
grid1[0] = 0.0;
grid2[0] = 0.0;
/* These are for the projection boundary. */
grid1[1] = -180.0;
grid1[2] = 180.0;
grid2[1] = -90.0;
grid2[2] = 90.0;
cpgsci(1);
for (i = 0; i < nwcs; i++) {
if (alt && (wcs+i)->alt[0] != alt) {
continue;
}
if ((status = wcsset(wcs+i))) {
fprintf(stderr, "wcsset ERROR %d: %s.\n", status, wcs_errmsg[status]);
continue;
}
/* Draw the frame. */
cpgbox("BC", 0.0f, 0, "BC", 0.0f, 0);
/* Axis labels; use CNAMEia in preference to CTYPEia. */
if ((wcs+i)->cname[0][0]) {
strcpy(idents[0], (wcs+i)->cname[0]);
} else {
strcpy(idents[0], (wcs+i)->ctype[0]);
}
if ((wcs+i)->cname[1][0]) {
strcpy(idents[1], (wcs+i)->cname[1]);
} else {
strcpy(idents[1], (wcs+i)->ctype[1]);
}
/* Title; use WCSNAME. */
strcpy(idents[2], (wcs+i)->wcsname);
if (strlen(idents[2])) {
printf("\n%s\n", idents[2]);
}
/* Formatting control for celestial coordinates. */
if (strncmp((wcs+i)->ctype[0], "RA", 2) == 0) {
/* Right ascension in HMS, declination in DMS. */
opt[0] = 'G';
opt[1] = 'E';
} else {
/* Other angles in decimal degrees. */
opt[0] = 'A';
opt[1] = 'B';
}
/* 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);
/* Delimit the projection boundary. */
if ((wcs+i)->cel.prj.category != ZENITHAL) {
/* Reset to the native coordinate graticule. */
(wcs+i)->crval[0] = (wcs+i)->cel.prj.phi0;
(wcs+i)->crval[1] = (wcs+i)->cel.prj.theta0;
(wcs+i)->lonpole = 999.0;
(wcs+i)->latpole = 999.0;
status = wcsset(wcs+i);
ic = -1;
cpgsbox(blc, trc, idents, opt, -1, 0, c0, gcode, 0.0, 2, grid1, 2,
grid2, 0, pgwcsl_, 1, WCSLEN, 1, nlcprm, (int *)(wcs+i), nldprm, 256,
&ic, cache, &status);
}
cpgpage();
}
status = wcsvfree(&nwcs, &wcs);
return 0;
fitserr:
fits_report_error(stderr, status);
fits_close_file(fptr, &status);
return 1;
}
int main()
{
char infile[] = "pih.fits";
char a, *hptr;
int alts[27], ctrl, ialt, iblock, ifix, ikeyrec, iwcs, nkeyrec, nreject,
nwcs, relax, stat[NWCSFIX], status;
struct wcsprm *wcs;
#if defined HAVE_CFITSIO && defined DO_CFITSIO
char *header;
fitsfile *fptr;
#else
char keyrec[81], header[288001];
int gotend, 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 (tpih1.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")) == 0) {
fprintf(stderr, "ERROR opening %s\n", infile);
return 1;
}
k = 0;
nkeyrec = 0;
gotend = 0;
for (iblock = 0; iblock < 100; iblock++) {
for (ikeyrec = 0; ikeyrec < 36; ikeyrec++) {
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;
strncpy(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\n", nkeyrec);
/* Parse the header, allowing all recognized non-standard WCS keywords and
* usage. All WCS keyrecords are culled from the header, illegal ones are
* reported. */
relax = WCSHDR_all;
ctrl = -2;
fprintf(stderr, "\nIllegal or extraneous WCS header keyrecords rejected "
"by wcspih():\n");
if ((status = wcspih(header, nkeyrec, relax, ctrl, &nreject, &nwcs,
&wcs))) {
fprintf(stderr, "wcspih ERROR %d: %s.\n", status, wcs_errmsg[status]);
}
if (!nreject) fprintf(stderr, "(none)\n");
/* List the remaining keyrecords. */
printf("\n\nNon-WCS header keyrecords ignored by wcspih():\n");
hptr = header;
while (*hptr) {
printf("%.80s\n", hptr);
hptr += 80;
}
#if defined HAVE_CFITSIO && defined DO_CFITSIO
free(header);
#endif
/* Summarize what was found. */
status = wcsidx(nwcs, &wcs, alts);
printf("\n\nFound %d alternate coordinate descriptions with indices:\n ",
nwcs);
for (a = 'A'; a <= 'Z'; a++) {
printf("%2c", a);
}
printf("\n");
for (ialt = 0; ialt < 27; ialt++) {
if (alts[ialt] < 0) {
printf(" -");
} else {
printf("%2d", alts[ialt]);
}
}
printf("\n");
/* Fix non-standard usage and print each of the wcsprm structs. The output
* from wcsprt() will be written to an internal buffer and then printed just
* to show that it can be done. */
wcsprintf_set(0x0);
for (iwcs = 0; iwcs < nwcs; iwcs++) {
wcsprintf("\n------------------------------------"
"------------------------------------\n");
/* Fix non-standard WCS keyvalues. */
if ((status = wcsfix(7, 0, wcs+iwcs, stat))) {
printf("wcsfix ERROR, status returns: (");
for (ifix = 0; ifix < NWCSFIX; ifix++) {
printf(ifix ? ", %d" : "%d", stat[ifix]);
}
printf(")\n\n");
}
if ((status = wcsset(wcs+iwcs))) {
fprintf(stderr, "wcsset ERROR %d: %s.\n", status, wcs_errmsg[status]);
continue;
}
if ((status = wcsprt(wcs+iwcs))) {
fprintf(stderr, "wcsprt ERROR %d: %s.\n", status, wcs_errmsg[status]);
}
}
printf("%s", wcsprintf_buf());
status = wcsvfree(&nwcs, &wcs);
return 0;
}
int main(int argc, char *argv[])
{
char *header, *hptr;
int dohdr = 0, dopixel = 0, doworld = 0;
int i, nkeyrec, nreject, nwcs, stat[NWCSFIX], status = 0;
double imgcrd[2], phi, pixcrd[2], theta, world[2];
fitsfile *fptr;
struct wcsprm *wcs;
/* Parse options. */
for (i = 1; i < argc && argv[i][0] == '-'; i++) {
if (!argv[i][1]) break;
switch (argv[i][1]) {
case 'h':
dohdr = 1;
break;
case 'p':
dopixel = 1;
break;
case 'w':
doworld = 1;
break;
default:
fprintf(stderr, "Usage: twcshdr [-h | -p | -w] <file>\n");
return 1;
}
}
if (i != (argc-1)) {
fprintf(stderr, "Usage: twcshdr [-h | -p | -w] <file>\n");
return 1;
}
/* Open the FITS test file and read the primary header. */
fits_open_file(&fptr, argv[i], READONLY, &status);
if ((status = fits_hdr2str(fptr, 1, NULL, 0, &header, &nkeyrec, &status))) {
fits_report_error(stderr, status);
return 1;
}
/*-----------------------------------------------------------------------*/
/* Basic steps required to interpret a FITS WCS header, including -TAB. */
/*-----------------------------------------------------------------------*/
/* Parse the primary header of the FITS file. */
if ((status = wcspih(header, nkeyrec, WCSHDR_all, 2, &nreject, &nwcs,
&wcs))) {
fprintf(stderr, "wcspih ERROR %d: %s.\n", status,wcshdr_errmsg[status]);
}
/* Read coordinate arrays from the binary table extension. */
if ((status = fits_read_wcstab(fptr, wcs->nwtb, (wtbarr *)wcs->wtb,
&status))) {
fits_report_error(stderr, status);
return 1;
}
/* Translate non-standard WCS keyvalues. */
if ((status = wcsfix(7, 0, wcs, stat))) {
for (i = 0; i < NWCSFIX; i++) {
if (stat[i] > 0) {
fprintf(stderr, "wcsfix ERROR %d: %s.\n", status,
wcsfix_errmsg[stat[i]]);
}
}
return 1;
}
/*-----------------------------------------------------------------------*/
/* The wcsprm struct is now ready for use. */
/*-----------------------------------------------------------------------*/
/* Finished with the FITS file. */
fits_close_file(fptr, &status);
free(header);
/* Initialize the wcsprm struct, also taking control of memory allocated by
* fits_read_wcstab(). */
if ((status = wcsset(wcs))) {
fprintf(stderr, "wcsset ERROR %d: %s.\n", status, wcs_errmsg[status]);
return 1;
}
if (dohdr) {
if ((status = wcshdo(WCSHDO_all, wcs, &nkeyrec, &header))) {
return 1;
}
hptr = header;
printf("\n\n");
for (i = 0; i < nkeyrec; i++, hptr += 80) {
printf("%.80s\n", hptr);
}
free(header);
} else if (dopixel) {
while (1) {
printf("Enter pixel coordinates: ");
if (scanf("%lf%*[ ,]%lf", pixcrd, pixcrd+1) != wcs->naxis) break;
status = wcsp2s(wcs, 1, 2, pixcrd, imgcrd, &phi, &theta, world, stat);
printf(" (%20.15f, %20.15f) ->\n (%20.15f, %20.15f)\n\n",
pixcrd[0], pixcrd[1], world[0], world[1]);
}
} else if (doworld) {
while (1) {
printf("Enter world coordinates: ");
if (scanf("%lf%*[ ,]%lf", world, world+1) != wcs->naxis) break;
status = wcss2p(wcs, 1, 2, world, &phi, &theta, imgcrd, pixcrd, stat);
printf(" (%20.15f, %20.15f) ->\n (%20.15f, %20.15f)\n\n",
world[0], world[1], pixcrd[0], pixcrd[1]);
}
} else {
/* Print the struct. */
if ((status = wcsprt(wcs))) {
return 1;
}
}
/* Clean up. */
status = wcsvfree(&nwcs, &wcs);
return 0;
}
/* Read the WCS information from the header. Unfortunately, WCS lib is
not thread safe, so it needs a mutex. In case you are not using
multiple threads, just pass a NULL pointer as the mutex.
After you finish with this WCS, you should free the space with:
status = wcsvfree(&nwcs,&wcs);
If the WCS structure is not recognized, then this function will
return a NULL pointer for the wcsprm structure and a zero for
nwcs. It will also report the fact to the user in stderr.
===================================
WARNING: wcspih IS NOT THREAD SAFE!
===================================
Don't call this function within a thread or use a mutex.
*/
struct wcsprm *
gal_wcs_read_fitsptr(fitsfile *fptr, size_t hstartwcs, size_t hendwcs,
int *nwcs)
{
/* Declaratins: */
int nkeys=0, status=0;
struct wcsprm *wcs=NULL;
char *fullheader, *to, *from;
int relax = WCSHDR_all; /* Macro: use all informal WCS extensions. */
int ctrl = 0; /* Don't report why a keyword wasn't used. */
int nreject = 0; /* Number of keywords rejected for syntax. */
/* CFITSIO function: */
if( fits_hdr2str(fptr, 1, NULL, 0, &fullheader, &nkeys, &status) )
gal_fits_io_error(status, NULL);
/* Only consider the header keywords in the current range: */
if(hendwcs>hstartwcs)
{
/* Mark the last character in the desired region. */
fullheader[hendwcs*(FLEN_CARD-1)]='\0';
/*******************************************************/
/******************************************************
printf("%s\n", fullheader);
******************************************************/
/*******************************************************/
/* Shift all the characters to the start of the string. */
if(hstartwcs) /* hstartwcs!=0 */
{
to=fullheader;
from=&fullheader[hstartwcs*(FLEN_CARD-1)-1];
while(*from++!='\0') *to++=*from;
}
nkeys=hendwcs-hstartwcs;
/*******************************************************/
/******************************************************
printf("\n\n\n###############\n\n\n\n\n\n");
printf("%s\n", &fullheader[1*(FLEN_CARD-1)]);
exit(0);
******************************************************/
/*******************************************************/
}
/* WCSlib function to parse the FITS headers. */
status=wcspih(fullheader, nkeys, relax, ctrl, &nreject, nwcs, &wcs);
if(status)
{
fprintf(stderr, "\n##################\n"
"WCSLIB Warning: wcspih ERROR %d: %s.\n"
"##################\n",
status, wcs_errmsg[status]);
wcs=NULL; *nwcs=0;
}
if (fits_free_memory(fullheader, &status) )
gal_fits_io_error(status, "problem in fitsarrayvv.c for freeing "
"the memory used to keep all the headers");
/* Set the internal structure: */
if(wcs)
{
/* CTYPE is a mandatory WCS keyword, so if it hasn't been given (its
'\0'), then the headers didn't have a WCS structure. However,
WCSLIB still fills in the basic information (for example the
dimensionality of the dataset). */
if(wcs->ctype[0][0]=='\0')
{
wcsfree(wcs);
wcs=NULL;
*nwcs=0;
}
else
{
/* Set the WCS structure. */
status=wcsset(wcs);
if(status)
{
fprintf(stderr, "\n##################\n"
"WCSLIB Warning: wcsset ERROR %d: %s.\n"
"##################\n",
status, wcs_errmsg[status]);
wcsfree(wcs);
wcs=NULL;
*nwcs=0;
}
else
/* A correctly useful WCS is present. When no PC matrix
elements were present in the header, the default PC matrix
(a unity matrix) is used. In this case WCSLIB doesn't set
`altlin' (and gives it a value of 0). In Gnuastro, later on,
we might need to know the type of the matrix used, so in
such a case, we will set `altlin' to 1. */
if(wcs->altlin==0) wcs->altlin=1;
}
}
/* Return the WCS structure. */
return wcs;
}
