function: map_ull_keylibrary: avlmap

Name

map_ull_key

Synopsis

unsigned long long map_ull_key( MAP mapping )

Description

map_ull_key returns the key value of the active member of a mapping of key type unsigned long long. If there is no currently active member of the mapping, a value of (unsigned long long) 0 is returned. To reliably determine if there is an active member, call map_data_type.

Arguments

  1. mapping is the handle of the specified mapping.

Return values

Errors

The errno value is set by system functions when an error occurs.

See also

avlmap index page


The documentation, source code, and derived compilations are
Copyright © 2000 by Philip Howard.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA