WCSLIB 8.4

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wcslib.h
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1/*============================================================================
2 WCSLIB 8.4 - an implementation of the FITS WCS standard.
3 Copyright (C) 1995-2024, Mark Calabretta
4
5 This file is part of WCSLIB.
6
7 WCSLIB is free software: you can redistribute it and/or modify it under the
8 terms of the GNU Lesser General Public License as published by the Free
9 Software Foundation, either version 3 of the License, or (at your option)
10 any later version.
11
12 WCSLIB is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
14 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
15 more details.
16
17 You should have received a copy of the GNU Lesser General Public License
18 along with WCSLIB. If not, see http://www.gnu.org/licenses.
19
20 Author: Mark Calabretta, Australia Telescope National Facility, CSIRO.
21 http://www.atnf.csiro.au/people/Mark.Calabretta
22 $Id: wcslib.h,v 8.4 2024/10/28 13:56:16 mcalabre Exp $
23*=============================================================================
24*
25* WCSLIB 8.4 - C routines that implement the FITS World Coordinate System
26* (WCS) standard. Refer to the README file provided with WCSLIB for an
27* overview of the library.
28*
29* Summary of wcslib.h
30* -------------------
31* This header file is provided purely for convenience. Use it to include all
32* of the separate WCSLIB headers.
33*
34*===========================================================================*/
35
36#ifndef WCSLIB_WCSLIB
37#define WCSLIB_WCSLIB
38
39#include "cel.h"
40#include "dis.h"
41#include "fitshdr.h"
42#include "lin.h"
43#include "log.h"
44#include "prj.h"
45#include "spc.h"
46#include "sph.h"
47#include "spx.h"
48#include "tab.h"
49#include "wcs.h"
50#include "wcserr.h"
51#include "wcsfix.h"
52#include "wcshdr.h"
53#include "wcsmath.h"
54#include "wcsprintf.h"
55#include "wcstrig.h"
56#include "wcsunits.h"
57#include "wcsutil.h"
58#include "wtbarr.h"
59
60#endif // WCSLIB_WCSLIB
3695 wcserr_enable(1);
3696 wcsprintf_set(stderr);
3697
3698 ...
3699
3700 if (wcsset(&wcs) {
3701 wcsperr(&wcs);
3702 return wcs.err->status;
3703 }
3704@endverbatim
3705In this example, if an error was generated in one of the prjset() functions,
3706 wcsperr() would print an error traceback starting with wcsset(), then
3707 celset(), and finally the particular projection-setting function that
3708generated the error. For each of them it would print the status return value,
3709function name, source file, line number, and an error message which may be
3710more specific and informative than the general error messages reported in the
3711first example. For example, in response to a deliberately generated error,
3712the @c twcs test program, which tests wcserr among other things, produces a
3713traceback similar to this:
3714@verbatim
3715ERROR 5 in wcsset() at line 1564 of file wcs.c:
3716 Invalid parameter value.
3717ERROR 2 in celset() at line 196 of file cel.c:
3718 Invalid projection parameters.
3719ERROR 2 in bonset() at line 5727 of file prj.c:
3720 Invalid parameters for Bonne's projection.
3721@endverbatim
3722
3723Each of the @ref structs "structs" in @ref overview "WCSLIB" includes a
3724pointer, called @a err, to a wcserr struct. When an error occurs, a struct is
3725allocated and error information stored in it. The wcserr pointers and the
3726@ref memory "memory" allocated for them are managed by the routines that
3727manage the various structs such as wcsinit() and wcsfree().
3728
3729 wcserr messaging is an opt-in system enabled via wcserr_enable(), as in the
3730example above. If enabled, when an error occurs it is the user's
3731responsibility to free the memory allocated for the error message using
3732 wcsfree(), celfree(), prjfree(), etc. Failure to do so before the struct goes
3733out of scope will result in memory leaks (if execution continues beyond the
3734error).
3735*/
3736
3737
cel.h
celfree
int celfree(struct celprm *cel)
Destructor for the celprm struct.
celset
int celset(struct celprm *cel)
Setup routine for the celprm struct.
dis.h
fitshdr.h
lin.h
log.h
prj.h
prjfree
int prjfree(struct prjprm *prj)
Destructor for the prjprm struct.
bonset
int bonset(struct prjprm *prj)
Set up a prjprm struct for Bonne's (BON) projection.
prjset
int prjset(struct prjprm *prj)
Generic setup routine for the prjprm struct.
spc.h
sph.h
spx.h
wcserr
Error message handling.
Definition wcserr.h:243
tab.h
wcs.h
wcsfree
int wcsfree(struct wcsprm *wcs)
Destructor for the wcsprm struct.
wcsperr
int wcsperr(const struct wcsprm *wcs, const char *prefix)
Print error messages from a wcsprm struct.
wcsinit
int wcsinit(int alloc, int naxis, struct wcsprm *wcs, int npvmax, int npsmax, int ndpmax)
Default constructor for the wcsprm struct.
wcsset
int wcsset(struct wcsprm *wcs)
Setup routine for the wcsprm struct.
wcserr.h
wcserr_enable
int wcserr_enable(int enable)
Enable/disable error messaging.
wcsfix.h
wcshdr.h
wcsmath.h
wcsprintf.h
wcsprintf_set
int wcsprintf_set(FILE *wcsout)
Set output disposition for wcsprintf() and wcsfprintf().
wcstrig.h
wcsunits.h
wcsutil.h
wtbarr.h