- Reserve space in the CHU for MOREKEYS more header keywords.
This routine may be called to allocate space for additional keywords
at the time the header is created (prior to writing any data).
CFITSIO can dynamically add more space to the header when needed,
however it is more efficient to preallocate the required space
if the size is known in advance.
int fits_set_hdrsize / ffhdef
(fitsfile *fptr, int morekeys, > int *status)
- Return the number of keywords in the header (not counting the END
keyword) and the current position
in the header. The position is the number of the keyword record that
will be read next (or one greater than the position of the last keyword
that was read). A value of 1 is returned if the pointer is
positioned at the beginning of the header.
int fits_get_hdrpos / ffghps
(fitsfile *fptr, > int *keysexist, int *keynum, int *status)