debian man page for gd_nvectors

gd_nvectors(3)							      GETDATA							    gd_nvectors(3)

NAME
       gd_nvectors -- report the number of vector fields in a dirfile

SYNOPSIS
       #include <getdata.h>

       unsigned int gd_nvectors(DIRFILE *dirfile);

DESCRIPTION
       The  gd_nvectors() function queries a dirfile(5) database specified by dirfile and returns the number of vector fields defined in the data-
       base (i.e.  fields of types BIT, LINCOM, LINTERP, MULTIPLY, PHASE, POLYNOM, RAW, SBIT).	Notably, this count does not include /META fields.

       The dirfile argument must point to a valid DIRFILE object previously created by a call to gd_open(3).

RETURN VALUE
       Upon successful completion, gd_nvectors() returns the number of vector 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 gd_error(3).  A descriptive error string for the last error encountered can be obtained from
       a call to gd_error_string(3).

SEE ALSO
       dirfile(5), gd_open(3), gd_error(3), gd_error_string(3), gd_nfields(3), gd_nmvectors(3), gd_vector_list(3)

Version 0.7.0							   16 July 2010 						    gd_nvectors(3)