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/*============================================================================
WCSLIB 5.14 - an implementation of the FITS WCS standard.
Copyright (C) 1995-2016, 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.
Direct correspondence concerning WCSLIB to mark@calabretta.id.au
Author: Mark Calabretta, Australia Telescope National Facility, CSIRO.
http://www.atnf.csiro.au/people/Mark.Calabretta
$Id: getwcstab.c,v 5.14 2016/02/07 10:49:31 mcalabre Exp $
*===========================================================================*/
#include <stdlib.h>
#include <string.h>
#include <fitsio.h>
#include "getwcstab.h"
/*--------------------------------------------------------------------------*/
int fits_read_wcstab(
fitsfile *fptr,
int nwtb,
wtbarr *wtb,
int *status)
{
int anynul, colnum, hdunum, iwtb, m, naxis, nostat;
long *naxes = 0, nelem;
wtbarr *wtbp;
if (*status) return *status;
if (fptr == 0) {
return (*status = NULL_INPUT_PTR);
}
if (nwtb == 0) return 0;
/* Zero the array pointers. */
wtbp = wtb;
for (iwtb = 0; iwtb < nwtb; iwtb++, wtbp++) {
*wtbp->arrayp = 0x0;
}
/* Save HDU number so that we can move back to it later. */
fits_get_hdu_num(fptr, &hdunum);
wtbp = wtb;
for (iwtb = 0; iwtb < nwtb; iwtb++, wtbp++) {
/* Move to the required binary table extension. */
if (fits_movnam_hdu(fptr, BINARY_TBL, (char *)(wtbp->extnam),
wtbp->extver, status)) {
goto cleanup;
}
/* Locate the table column. */
if (fits_get_colnum(fptr, CASEINSEN, (char *)(wtbp->ttype), &colnum,
status)) {
goto cleanup;
}
/* Get the array dimensions and check for consistency. */
if (wtbp->ndim < 1) {
*status = NEG_AXIS;
goto cleanup;
}
if (!(naxes = calloc(wtbp->ndim, sizeof(long)))) {
*status = MEMORY_ALLOCATION;
goto cleanup;
}
if (fits_read_tdim(fptr, colnum, wtbp->ndim, &naxis, naxes, status)) {
goto cleanup;
}
if (naxis != wtbp->ndim) {
if (wtbp->kind == 'c' && wtbp->ndim == 2) {
/* Allow TDIMn to be omitted for degenerate coordinate arrays. */
naxis = 2;
naxes[1] = naxes[0];
naxes[0] = 1;
} else {
*status = BAD_TDIM;
goto cleanup;
}
}
if (wtbp->kind == 'c') {
/* Coordinate array; calculate the array size. */
nelem = naxes[0];
for (m = 0; m < naxis-1; m++) {
*(wtbp->dimlen + m) = naxes[m+1];
nelem *= naxes[m+1];
}
} else {
/* Index vector; check length. */
if ((nelem = naxes[0]) != *(wtbp->dimlen)) {
/* N.B. coordinate array precedes the index vectors. */
*status = BAD_TDIM;
goto cleanup;
}
}
free(naxes);
naxes = 0;
/* Allocate memory for the array. */
if (!(*wtbp->arrayp = calloc((size_t)nelem, sizeof(double)))) {
*status = MEMORY_ALLOCATION;
goto cleanup;
}
/* Read the array from the table. */
if (fits_read_col_dbl(fptr, colnum, wtbp->row, 1L, nelem, 0.0,
*wtbp->arrayp, &anynul, status)) {
goto cleanup;
}
}
cleanup:
/* Move back to the starting HDU. */
nostat = 0;
fits_movabs_hdu(fptr, hdunum, 0, &nostat);
/* Release allocated memory. */
if (naxes) free(naxes);
if (*status) {
wtbp = wtb;
for (iwtb = 0; iwtb < nwtb; iwtb++, wtbp++) {
if (*wtbp->arrayp) free(*wtbp->arrayp);
}
}
return *status;
}
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