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get_nvectors
Langue: en
Version: 16 October 2009 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
NAME
get_nvectors --- report the number of vector fields in a dirfileSYNOPSIS
#include <getdata.h>- unsigned int get_nvectors(DIRFILE *dirfile);
DESCRIPTION
- The get_nvectors() function queries a dirfile(5) database specified by dirfile and returns the number of vector fields defined in the database (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 dirfile_open(3).
RETURN VALUE
Upon successful completion, get_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 get_error(3). A descriptive error string for the last error encountered can be obtained from a call to get_error_string(3).
SEE ALSO
dirfile(5), dirfile_open(3), getdata(3), get_error(3), get_error_string(3), get_nfields(3), get_nmvectors(3), get_vector_list(3)Contenus ©2006-2024 Benjamin Poulain
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