get_nfields (3) Linux Manual Page
NAME
get_nfields — report the number of fields in a dirfile
SYNOPSIS
#include <getdata.h>
-
unsigned int get_nfields(DIRFILE *dirfile);
DESCRIPTION
get_nfields() function queries a dirfile(5) database specified by dirfile and returns the number of fields defined in the database. Notably, this count does not include /META fields.
The dirfile argument must point to a valid DIRFILE object previously created by a call to dirfile_open(3).
RETURN VALUE
Upon successful completion, get_nfields() returns the number of defined fields in the dirfile. On error, it returns zero and sets the dirfile error to a non-zero error value. Possible error values are:
GD_E_BAD_DIRFILE- The supplied dirfile was invalid. The dirfile error may be retrieved by calling
get_error(3). A descriptive error string for the last error encountered can be obtained from a call toget_error_string(3).
SEE ALSO
dirfile(5), dirfile_open(3), getdata(3), get_error(3), get_error_string(3), get_field_list(3), get_nfields_by_type(3), get_nmfields(3), get_nvectors(3)