debian man page for gd_nmvectors

gd_nmvectors(3) 						      GETDATA							   gd_nmvectors(3)

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

SYNOPSIS
       #include <getdata.h>

       unsigned int gd_nmvectors(DIRFILE *dirfile);

DESCRIPTION
       The  gd_nmvectors()  function queries a dirfile(5) database specified by dirfile and returns the number of vector metafields defined in the
       database (i.e.  fields of types BIT, LINCOM, LINTERP, MULTIPLY, PHASE, and RAW)for the supplied parent field.

       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_nmvectors() returns the number of vector metafields in the dirfile for the given parent.	On error,  it  re-
       turns zero and sets the dirfile error to a non-zero error value.  Possible error values are:

       GD_E_BAD_CODE
	       The supplied parent field code was not found, or referred to a metafield itself.

       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_mvector_list(3), gd_nmfields(3), gd_nvectors(3)

Version 0.7.0							   16 July 2010 						   gd_nmvectors(3)