WCSLIB 7.11

wcslib.h
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1/*============================================================================
2 WCSLIB 7.11 - an implementation of the FITS WCS standard.
3 Copyright (C) 1995-2022, 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 7.11 2022/04/26 06:13:52 mcalabre Exp $
23*=============================================================================
24*
25* WCSLIB 7.11 - 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
3582 wcserr_enable(1);
3583 wcsprintf_set(stderr);
3584
3585 ...
3586
3587 if (wcsset(&wcs) {
3588 wcsperr(&wcs);
3589 return wcs.err->status;
3590 }
3591@endverbatim
3592In this example, if an error was generated in one of the prjset() functions,
3593 wcsperr() would print an error traceback starting with wcsset(), then
3594 celset(), and finally the particular projection-setting function that
3595generated the error. For each of them it would print the status return value,
3596function name, source file, line number, and an error message which may be
3597more specific and informative than the general error messages reported in the
3598first example. For example, in response to a deliberately generated error,
3599the @c twcs test program, which tests wcserr among other things, produces a
3600traceback similar to this:
3601@verbatim
3602ERROR 5 in wcsset() at line 1564 of file wcs.c:
3603 Invalid parameter value.
3604ERROR 2 in celset() at line 196 of file cel.c:
3605 Invalid projection parameters.
3606ERROR 2 in bonset() at line 5727 of file prj.c:
3607 Invalid parameters for Bonne's projection.
3608@endverbatim
3609
3610Each of the @ref structs "structs" in @ref overview "WCSLIB" includes a
3611pointer, called @a err, to a wcserr struct. When an error occurs, a struct is
3612allocated and error information stored in it. The wcserr pointers and the
3613@ref memory "memory" allocated for them are managed by the routines that
3614manage the various structs such as wcsinit() and wcsfree().
3615
3616 wcserr messaging is an opt-in system enabled via wcserr_enable(), as in the
3617example above. If enabled, when an error occurs it is the user's
3618responsibility to free the memory allocated for the error message using
3619 wcsfree(), celfree(), prjfree(), etc. Failure to do so before the struct goes
3620out of scope will result in memory leaks (if execution continues beyond the
3621error).
3622*/
3623
3624
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