3281 return wcs.err->status;
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:
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.
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
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
3312 out of scope will result in memory leaks (if execution continues beyond the
int wcsfree(struct wcsprm *wcs)
Destructor for the wcsprm struct.
int wcserr_enable(int enable)
Enable/disable error messaging.
Error message handling.
Definition: wcserr.h:225
int prjfree(struct prjprm *prj)
Destructor for the prjprm struct.
int wcsset(struct wcsprm *wcs)
Setup routine for the wcsprm struct.
int celfree(struct celprm *cel)
Destructor for the celprm struct.
int wcsprintf_set(FILE *wcsout)
Set output disposition for wcsprintf() and wcsfprintf().
int wcsperr(const struct wcsprm *wcs, const char *prefix)
Print error messages from a wcsprm struct.
int prjset(struct prjprm *prj)
Generic setup routine for the prjprm struct.
int bonset(struct prjprm *prj)
Set up a prjprm struct for Bonne's (BON) projection.
int wcsini(int alloc, int naxis, struct wcsprm *wcs)
Default constructor for the wcsprm struct.
int celset(struct celprm *cel)
Setup routine for the celprm struct.