1960 return wcs.err->status;
1963 In
this example,
if an error was generated in one of the
prjset() functions,
1964 wcsperr() would print an error traceback starting with
wcsset(), then
1965 celset(), and finally the particular projection-setting function that
1966 generated the error. For each of them it would print the status return value,
1967 function name, source file, line number, and an error message which may be
1968 more specific and informative than the general error messages reported in the
1969 first example. For example, in response to a deliberately generated error,
1970 the @c twcs test program, which tests
wcserr among other things, produces a
1971 traceback similar to this:
1973 ERROR 5 in wcsset() at line 1564 of file wcs.c:
1974 Invalid parameter value.
1975 ERROR 2 in celset() at line 196 of file cel.c:
1976 Invalid projection parameters.
1977 ERROR 2 in
bonset() at line 5727 of file prj.c:
1978 Invalid parameters for Bonne's projection.
1981 Each of the @ref structs "structs" in @ref overview "WCSLIB" includes a
1982 pointer, called @a err, to a
wcserr struct. When an error occurs, a struct is
1983 allocated and error information stored in it. The
wcserr pointers and the
1984 @ref memory "memory" allocated for them are managed by the routines that
1988 example above. If enabled, when an error occurs it is the user's
1989 responsibility to free the memory allocated for the error message using
1991 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:221
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.