WCSLIB 5.17

wcslib.h
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1 /*============================================================================
2
3 WCSLIB 5.17 - an implementation of the FITS WCS standard.
4 Copyright (C) 1995-2017, Mark Calabretta
5
6 This file is part of WCSLIB.
7
8 WCSLIB is free software: you can redistribute it and/or modify it under the
9 terms of the GNU Lesser General Public License as published by the Free
10 Software Foundation, either version 3 of the License, or (at your option)
11 any later version.
12
13 WCSLIB is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
15 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
16 more details.
17
18 You should have received a copy of the GNU Lesser General Public License
19 along with WCSLIB. If not, see http://www.gnu.org/licenses.
20
21 Direct correspondence concerning WCSLIB to mark@calabretta.id.au
22
23 Author: Mark Calabretta, Australia Telescope National Facility, CSIRO.
24 http://www.atnf.csiro.au/people/Mark.Calabretta
25 $Id: wcslib.h,v 5.17 2017/09/18 08:44:23 mcalabre Exp $
26 *=============================================================================
27 *
28 * WCSLIB 5.17 - C routines that implement the FITS World Coordinate System
29 * (WCS) standard. Refer to the README file provided with WCSLIB for an
30 * overview of the library.
31 *
32 * Summary of wcslib.h
33 * -------------------
34 * This header file is provided purely for convenience. Use it to include all
35 * of the separate WCSLIB headers.
36 *
37 *===========================================================================*/
38
39 #ifndef WCSLIB_WCSLIB
40 #define WCSLIB_WCSLIB
41
42 #include "cel.h"
43 #include "dis.h"
44 #include "fitshdr.h"
45 #include "lin.h"
46 #include "log.h"
47 #include "prj.h"
48 #include "spc.h"
49 #include "sph.h"
50 #include "spx.h"
51 #include "tab.h"
52 #include "wcs.h"
53 #include "wcserr.h"
54 #include "wcsfix.h"
55 #include "wcshdr.h"
56 #include "wcsmath.h"
57 #include "wcsprintf.h"
58 #include "wcstrig.h"
59 #include "wcsunits.h"
60 #include "wcsutil.h"
61
62 #endif /* WCSLIB_WCSLIB */
63
3274 wcserr_enable(1);
3275 wcsprintf_set(stderr);
3276
3277 ...
3278
3279 if (wcsset(&wcs) {
3280 wcsperr(&wcs);
3281 return wcs.err->status;
3282 }
3283 @endverbatim
3284 In this example, if an error was generated in one of the prjset() functions,
3285 wcsperr() would print an error traceback starting with wcsset(), then
3286 celset(), and finally the particular projection-setting function that
3287 generated the error. For each of them it would print the status return value,
3288 function name, source file, line number, and an error message which may be
3289 more specific and informative than the general error messages reported in the
3290 first example. For example, in response to a deliberately generated error,
3291 the @c twcs test program, which tests wcserr among other things, produces a
3292 traceback similar to this:
3293 @verbatim
3294 ERROR 5 in wcsset() at line 1564 of file wcs.c:
3295 Invalid parameter value.
3296 ERROR 2 in celset() at line 196 of file cel.c:
3297 Invalid projection parameters.
3298 ERROR 2 in bonset() at line 5727 of file prj.c:
3299 Invalid parameters for Bonne's projection.
3300 @endverbatim
3301
3302 Each of the @ref structs "structs" in @ref overview "WCSLIB" includes a
3303 pointer, called @a err, to a wcserr struct. When an error occurs, a struct is
3304 allocated and error information stored in it. The wcserr pointers and the
3305 @ref memory "memory" allocated for them are managed by the routines that
3306 manage the various structs such as wcsini() and wcsfree().
3307
3308 wcserr messaging is an opt-in system enabled via wcserr_enable(), as in the
3309 example above. If enabled, when an error occurs it is the user's
3310 responsibility to free the memory allocated for the error message using
3311 wcsfree(), celfree(), prjfree(), etc. Failure to do so before the struct goes
3312 out of scope will result in memory leaks (if execution continues beyond the
3313 error).
3314 */
3315
3316
wcsfree
int wcsfree(struct wcsprm *wcs)
Destructor for the wcsprm struct.
dis.h
wcshdr.h
lin.h
cel.h
prj.h
wcserr_enable
int wcserr_enable(int enable)
Enable/disable error messaging.
wcserr
Error message handling.
Definition: wcserr.h:225
wcsunits.h
wcsmath.h
spc.h
sph.h
prjfree
int prjfree(struct prjprm *prj)
Destructor for the prjprm struct.
wcsset
int wcsset(struct wcsprm *wcs)
Setup routine for the wcsprm struct.
celfree
int celfree(struct celprm *cel)
Destructor for the celprm struct.
fitshdr.h
wcsprintf_set
int wcsprintf_set(FILE *wcsout)
Set output disposition for wcsprintf() and wcsfprintf().
wcsperr
int wcsperr(const struct wcsprm *wcs, const char *prefix)
Print error messages from a wcsprm struct.
prjset
int prjset(struct prjprm *prj)
Generic setup routine for the prjprm struct.
wcsutil.h
wcsfix.h
wcsprintf.h
bonset
int bonset(struct prjprm *prj)
Set up a prjprm struct for Bonne&#39;s (BON) projection.
wcsini
int wcsini(int alloc, int naxis, struct wcsprm *wcs)
Default constructor for the wcsprm struct.
wcserr.h
wcs.h
tab.h
log.h
wcstrig.h
spx.h
celset
int celset(struct celprm *cel)
Setup routine for the celprm struct.