static int wcslib_radec2pixelxy(const anwcslib_t* anwcslib, double ra, double dec, double* px, double* py) {
double pix[2];
double world[2];
double phi;
double theta;
double imgcrd[2];
int status = 0;
int code;
struct wcsprm* wcs = anwcslib->wcs;
world[wcs->lng] = ra;
world[wcs->lat] = dec;
code = wcss2p(wcs, 1, 0, world, &phi, &theta, imgcrd, pix, &status);
/*
int wcss2p(struct wcsprm *wcs, int ncoord, int nelem, const double world[],
double phi[], double theta[], double imgcrd[], double pixcrd[],
int stat[]);
*/
if (code) {
ERROR("Wcslib's wcss2p() failed: code=%i, status=%i", code, status);
return -1;
}
if (px) *px = pix[0];
if (py) *py = pix[1];
return 0;
}
/* Convert world coordinates to image coordinates given the input WCS
structure. The input must be a linked list of data structures of float64
(`double') type. The top element of the linked list must be the first
coordinate and etc. If `inplace' is non-zero, then the output will be
written into the input's allocated space. */
gal_data_t *
gal_wcs_world_to_img(gal_data_t *coords, struct wcsprm *wcs, int inplace)
{
gal_data_t *out;
int status, *stat=NULL, ncoord=coords->size, nelem=wcs->naxis;
double *phi=NULL, *theta=NULL, *world=NULL, *pixcrd=NULL, *imgcrd=NULL;
/* Some sanity checks. */
wcs_convert_sanity_check_alloc(coords, wcs, __func__, &stat, &phi, &theta,
&world, &pixcrd, &imgcrd);
/* Write the values from the input list of separate columns into a single
array (WCSLIB input). */
wcs_convert_list_to_array(coords, world, stat, wcs->naxis, 1);
/* Use WCSLIB's wcsp2s for the conversion. */
status=wcss2p(wcs, ncoord, nelem, world, phi, theta, imgcrd, pixcrd, stat);
if(status)
error(EXIT_FAILURE, 0, "%s: wcss2p ERROR %d: %s", __func__, status,
wcs_errmsg[status]);
/* For a sanity check.
{
size_t i;
printf("\n\n%s sanity check:\n", __func__);
for(i=0;i<coords->size;++i)
printf("(%g, %g) --> (%g, %g), [stat: %d]\n", world[i*2], world[i*2+1],
pixcrd[i*2], pixcrd[i*2+1], stat[i]);
}
*/
/* Allocate the output arrays if they were not already allocated. */
out=wcs_convert_prepare_out(coords, wcs, inplace);
/* Write the output from a single array (WCSLIB output) into the output
list of this function. */
wcs_convert_list_to_array(out, pixcrd, stat, wcs->naxis, 0);
/* Clean up. */
free(phi);
free(stat);
free(theta);
free(world);
free(pixcrd);
/* Return the output list of coordinates. */
return out;
}
int wcss2p_(
int* wcs,
const int *ncoord,
const int *nelem,
const double world[],
double phi[],
double theta[],
double imgcrd[],
double pixcrd[],
int stat[])
{
return wcss2p((struct wcsprm *)wcs, *ncoord, *nelem, world, phi, theta,
imgcrd, pixcrd, stat);
}
int
default_wcsmap_init(struct wcsmap_param_t* m,
pipeline_t* input,
pipeline_t* output,
int nx, int ny,
double factor,
struct driz_error_t* error) {
int n;
int table_size;
double *pixcrd = NULL;
double *ptr = NULL;
double *tmp = NULL;
double *phi = NULL;
double *theta = NULL;
double *imgcrd = NULL;
int *stat = NULL;
int snx;
int sny;
int i;
int j;
int status = 1;
int istat;
assert(m);
assert(input);
assert(output);
assert(m->input_wcs == NULL);
assert(m->output_wcs == NULL);
assert(m->table == NULL);
if (factor > 0) {
snx = (int)((double)nx / factor) + 2;
sny = (int)((double)ny / factor) + 2;
n = (snx) * (sny);
table_size = n << 1;
pixcrd = malloc(table_size * sizeof(double));
if (pixcrd == NULL) {
driz_error_set_message(error, "Out of memory");
goto exit;
}
m->table = malloc(table_size * sizeof(double));
if (m->table == NULL) {
driz_error_set_message(error, "Out of memory");
goto exit;
}
tmp = malloc(table_size * sizeof(double));
if (tmp == NULL) {
driz_error_set_message(error, "Out of memory");
goto exit;
}
phi = malloc(n * sizeof(double));
if (phi == NULL) {
driz_error_set_message(error, "Out of memory");
goto exit;
}
theta = malloc(n * sizeof(double));
if (theta == NULL) {
driz_error_set_message(error, "Out of memory");
goto exit;
}
imgcrd = malloc(table_size * sizeof(double));
if (imgcrd == NULL) {
driz_error_set_message(error, "Out of memory");
goto exit;
}
stat = malloc(n * sizeof(int));
if (stat == NULL) {
driz_error_set_message(error, "Out of memory");
goto exit;
}
ptr = pixcrd;
for (j = 0; j < sny; ++j) {
for (i = 0; i < snx; ++i) {
*ptr++ = (double)i * factor;
*ptr++ = (double)j * factor;
}
}
wcsprm_python2c(input->wcs);
istat = pipeline_all_pixel2world(input, n, 2, pixcrd, tmp);
wcsprm_c2python(input->wcs);
if (istat) {
free(m->table);
m->table = NULL;
driz_error_set_message(error, wcslib_get_error_message(istat));
goto exit;
}
wcsprm_python2c(output->wcs);
istat = wcss2p(output->wcs, n, 2, tmp, phi, theta, imgcrd, m->table, stat);
wcsprm_c2python(output->wcs);
if (istat) {
free(m->table);
m->table = NULL;
driz_error_set_message(error, wcslib_get_error_message(istat));
goto exit;
}
} /* End if_then for factor > 0 */
m->input_wcs = input;
m->output_wcs = output;
m->nx = nx;
m->ny = ny;
m->snx = snx;
m->sny = sny;
m->factor = factor;
status = 0;
exit:
free(pixcrd);
free(tmp);
free(phi);
free(theta);
free(imgcrd);
free(stat);
return status;
}
static int
default_wcsmap_direct(struct wcsmap_param_t* m,
const double xd, const double yd,
const integer_t n,
double* xin /*[n]*/, double* yin /*[n]*/,
/* Output parameters */
double* xout, double* yout,
struct driz_error_t* error) {
integer_t i;
int status;
int result = 1;
double *memory = NULL;
double *ptr = NULL;
double *xyin = NULL;
double *skyout = NULL;
double *xyout = NULL;
double *imgcrd = NULL;
double *phi = NULL;
double *theta = NULL;
int *stat = NULL;
/* Allocate memory for new 2-D array */
ptr = memory = (double *) malloc(n * 10 * sizeof(double));
if (memory == NULL) goto exit;
xyin = ptr;
ptr += n * 2;
xyout = ptr;
ptr += n * 2;
skyout = ptr;
ptr += n * 2;
imgcrd = ptr;
ptr += n * 2;
phi = ptr;
ptr += n;
theta = ptr;
stat = (int *)malloc(n * sizeof(int));
if (stat == NULL) goto exit;
/* The input arrays need to be converted to 2-D arrays for input
to the PyWCS (and related) functions. */
/* Populate new 2-D array with values from x and y input arrays */
for (i = 0; i < n; ++i) {
xyin[2*i] = xin[i];
xyin[2*i+1] = yin[i];
}
/*
Apply pix2sky() transformation from PyWCS
*/
wcsprm_python2c(m->input_wcs->wcs);
status = pipeline_all_pixel2world(m->input_wcs, n, 2, xyin, skyout);
wcsprm_c2python(m->input_wcs->wcs);
if (status) {
goto exit;
}
/*
Finally, call wcs_sky2pix() for the output object.
*/
wcsprm_python2c(m->output_wcs->wcs);
status = wcss2p(m->output_wcs->wcs, n, 2,
skyout, phi, theta, imgcrd, xyout, stat);
wcsprm_c2python(m->output_wcs->wcs);
if (status) {
goto exit;
}
/*
Transform results back to 2 1-D arrays, like the input.
*/
for (i = 0; i < n; ++i){
xout[i] = xyout[2*i];
yout[i] = xyout[2*i+1];
}
result = 0;
exit:
/*
Free memory allocated to internal 2-D arrays
*/
free(memory);
free(stat);
return result;
}
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()
{
#define NELEM 9
char ok[] = "", mismatch[] = " (WARNING, mismatch)", *s;
int i, k, lat, lng, nFail1 = 0, nFail2 = 0, stat[361], status;
double freq, img[361][NELEM], lat1, lng1, phi[361], pixel1[361][NELEM],
pixel2[361][NELEM], r, resid, residmax, theta[361], time,
world1[361][NELEM], world2[361][NELEM];
struct wcsprm *wcs;
printf("Testing closure of WCSLIB world coordinate transformation "
"routines (twcs.c)\n"
"----------------------------------------------------------"
"-----------------\n");
/* List status return messages. */
printf("\nList of wcs status return values:\n");
for (status = 1; status <= 13; status++) {
printf("%4d: %s.\n", status, wcs_errmsg[status]);
}
printf("\nSize of data types (bytes):\n");
printf(" char:%5"MODZ"u\n", sizeof(char));
printf(" short int:%5"MODZ"u\n", sizeof(short int));
printf(" int:%5"MODZ"u\n", sizeof(int));
printf(" long int:%5"MODZ"u\n", sizeof(long int));
printf(" float:%5"MODZ"u\n", sizeof(float));
printf(" double:%5"MODZ"u\n", sizeof(double));
printf(" char *:%5"MODZ"u\n", sizeof(char *));
printf(" char (*)[72]:%5"MODZ"u\n", sizeof(char (*)[72]));
printf(" int *:%5"MODZ"u\n", sizeof(int *));
printf(" float *:%5"MODZ"u\n", sizeof(float *));
printf(" double *:%5"MODZ"u\n", sizeof(double *));
printf("struct pvcard *:%5"MODZ"u\n", sizeof(struct pvcard *));
printf("struct pscard *:%5"MODZ"u\n", sizeof(struct pscard *));
printf("\nSize of structs (bytes/ints):\n");
s = (sizeof(struct celprm) == sizeof(int)*CELLEN) ? ok : mismatch;
printf(" celprm:%5"MODZ"u /%4"MODZ"u%s\n", sizeof(struct celprm),
CELLEN, s);
s = (sizeof(struct fitskey) == sizeof(int)*KEYLEN) ? ok : mismatch;
printf(" fitskey:%5"MODZ"u /%4"MODZ"u%s\n", sizeof(struct fitskey),
KEYLEN, s);
s = (sizeof(struct fitskeyid) == sizeof(int)*KEYIDLEN) ? ok : mismatch;
printf(" fitskeyid:%5"MODZ"u /%4"MODZ"u%s\n", sizeof(struct fitskeyid),
KEYIDLEN, s);
s = (sizeof(struct linprm) == sizeof(int)*LINLEN) ? ok : mismatch;
printf(" linprm:%5"MODZ"u /%4"MODZ"u%s\n", sizeof(struct linprm),
LINLEN, s);
s = (sizeof(struct prjprm) == sizeof(int)*PRJLEN) ? ok : mismatch;
printf(" prjprm:%5"MODZ"u /%4"MODZ"u%s\n", sizeof(struct prjprm),
PRJLEN, s);
s = (sizeof(struct spcprm) == sizeof(int)*SPCLEN) ? ok : mismatch;
printf(" spcprm:%5"MODZ"u /%4"MODZ"u%s\n", sizeof(struct spcprm),
SPCLEN, s);
s = (sizeof(struct spxprm) == sizeof(int)*SPXLEN) ? ok : mismatch;
printf(" spxprm:%5"MODZ"u /%4"MODZ"u%s\n", sizeof(struct spxprm),
SPXLEN, s);
s = (sizeof(struct tabprm) == sizeof(int)*TABLEN) ? ok : mismatch;
printf(" tabprm:%5"MODZ"u /%4"MODZ"u%s\n", sizeof(struct tabprm),
TABLEN, s);
s = (sizeof(struct wcserr) == sizeof(int)*ERRLEN) ? ok : mismatch;
printf(" wcserr:%5"MODZ"u /%4"MODZ"u%s\n", sizeof(struct wcserr),
ERRLEN, s);
s = (sizeof(struct wcsprm) == sizeof(int)*WCSLEN) ? ok : mismatch;
printf(" wcsprm:%5"MODZ"u /%4"MODZ"u%s\n", sizeof(struct wcsprm),
WCSLEN, s);
/* Set the PVi_ma keyvalues for the longitude axis. */
/*----------------------------------------------------------*/
/* For test purposes, these are set so that the fiducial */
/* native coordinates are at the native pole, i.e. so that */
/* (phi0,theta0) = (0,90), but without any fiducial offset, */
/* i.e. iwith PVi_0a == 0 (by default). */
/*----------------------------------------------------------*/
PV[0].i = 4; /* Longitude is on axis 4. */
PV[0].m = 1; /* Parameter number 1. */
PV[0].value = 0.0; /* Fiducial native longitude. */
PV[1].i = 4; /* Longitude is on axis 4. */
PV[1].m = 2; /* Parameter number 2. */
PV[1].value = 90.0; /* Fiducial native latitude. */
/* Set the PVi_m keyvaluess for the latitude axis. */
PV[2].i = 2; /* Latitude is on axis 2. */
PV[2].m = 1; /* Parameter number 1. */
PV[2].value = -30.0; /* PVi_1. */
/* The following routine simulates the actions of a FITS header parser. */
wcs = malloc(sizeof(struct wcsprm));
wcs->flag = -1;
parser(wcs);
printf("\nReporting tolerance %5.1g pixel.\n", tol);
/* Initialize non-celestial world coordinates. */
time = 1.0;
freq = 1.42040595e9 - 180.0 * 62500.0;
for (k = 0; k < 361; k++) {
world1[k][0] = 0.0;
world1[k][1] = 0.0;
world1[k][2] = 0.0;
world1[k][3] = 0.0;
world1[k][2] = time;
time *= 1.01;
world1[k][wcs->spec] = 2.99792458e8 / freq;
freq += 62500.0;
}
residmax = 0.0;
for (lat = 90; lat >= -90; lat--) {
lat1 = (double)lat;
for (lng = -180, k = 0; lng <= 180; lng++, k++) {
lng1 = (double)lng;
world1[k][wcs->lng] = lng1;
world1[k][wcs->lat] = lat1;
}
if (wcss2p(wcs, 361, NELEM, world1[0], phi, theta, img[0], pixel1[0],
stat)) {
printf(" At wcss2p#1 with lat1 == %f\n", lat1);
wcsperr(wcs, " ");
continue;
}
if (wcsp2s(wcs, 361, NELEM, pixel1[0], img[0], phi, theta, world2[0],
stat)) {
printf(" At wcsp2s with lat1 == %f\n", lat1);
wcsperr(wcs, " ");
continue;
}
if (wcss2p(wcs, 361, NELEM, world2[0], phi, theta, img[0], pixel2[0],
stat)) {
printf(" At wcss2p#2 with lat1 == %f\n", lat1);
wcsperr(wcs, " ");
continue;
}
for (k = 0; k < 361; k++) {
resid = 0.0;
for (i = 0; i < NAXIS; i++) {
r = pixel2[k][i] - pixel1[k][i];
resid += r*r;
}
resid = sqrt(resid);
if (resid > residmax) residmax = resid;
if (resid > tol) {
nFail1++;
printf("\nClosure error:\n"
"world1:%18.12f%18.12f%18.12f%18.12f\n"
"pixel1:%18.12f%18.12f%18.12f%18.12f\n"
"world2:%18.12f%18.12f%18.12f%18.12f\n"
"pixel2:%18.12f%18.12f%18.12f%18.12f\n",
world1[k][0], world1[k][1], world1[k][2], world1[k][3],
pixel1[k][0], pixel1[k][1], pixel1[k][2], pixel1[k][3],
world2[k][0], world2[k][1], world2[k][2], world2[k][3],
pixel2[k][0], pixel2[k][1], pixel2[k][2], pixel2[k][3]);
}
}
}
printf("wcsp2s/wcss2p: Maximum closure residual = %.1e pixel.\n", residmax);
/* Test wcserr and wcsprintf() as well. */
nFail2 = 0;
wcsprintf_set(stdout);
wcsprintf("\n\nIGNORE messages marked with 'OK', they test wcserr "
"(and wcsprintf):\n");
wcserr_enable(1);
/* Test 1. */
wcs->pv[2].value = UNDEFINED;
status = wcsset(wcs);
nFail2 += check_error(wcs, status, WCSERR_BAD_PARAM,
"Invalid parameter value");
nFail2 += test_errors();
if (nFail1 || nFail2) {
if (nFail1) {
printf("\nFAIL: %d closure residuals exceed reporting tolerance.\n",
nFail1);
}
if (nFail2) {
printf("FAIL: %d error messages differ from that expected.\n", nFail2);
}
} else {
printf("\nPASS: All closure residuals are within reporting tolerance.\n");
printf("PASS: All error messages reported as expected.\n");
}
/* Clean up. */
wcsfree(wcs);
free(wcs);
return nFail1 + nFail2;
}
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;
}