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/*
* container_null.c
* $Id$
*
* see comments in header file.
*
*/
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-features.h>
#if HAVE_IO_H
#include <io.h>
#endif
#include <stdio.h>
#if HAVE_STDLIB_H
#include <stdlib.h>
#endif
#if HAVE_MALLOC_H
#include <malloc.h>
#endif
#include <sys/types.h>
#if HAVE_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/types.h>
#include <net-snmp/library/snmp_api.h>
#include <net-snmp/library/container.h>
#include <net-snmp/library/container_null.h>
#include <net-snmp/library/tools.h>
#include <net-snmp/library/snmp_assert.h>
netsnmp_feature_child_of(container_null, container_types)
/** @defgroup null_container null_container
* Helps you implement specialized containers.
* @ingroup container
*
* This is a simple container that doesn't actually contain anything.
* All the methods simply log a debug message and return.
*
* The original intent for this container is as a wrapper for a specialized
* container. Implement the functions you need, create a null_container,
* and override the default functions with your specialized versions.
*
* You can use the 'container:null' debug token to see what functions are
* being called, to help determine if you need to implement them.
*
* @{
*/
#ifndef NETSNMP_FEATURE_REMOVE_CONTAINER_NULL
/**********************************************************************
*
* container
*
*/
static void *
_null_find(netsnmp_container *container, const void *data)
{
DEBUGMSGTL(("container:null:find","in\n"));
return NULL;
}
static void *
_null_find_next(netsnmp_container *container, const void *data)
{
DEBUGMSGTL(("container:null:find_next","in\n"));
return NULL;
}
static int
_null_insert(netsnmp_container *container, const void *data)
{
DEBUGMSGTL(("container:null:insert","in\n"));
return 0;
}
static int
_null_remove(netsnmp_container *container, const void *data)
{
DEBUGMSGTL(("container:null:remove","in\n"));
return 0;
}
static int
_null_free(netsnmp_container *container)
{
DEBUGMSGTL(("container:null:free","in\n"));
free(container);
return 0;
}
static int
_null_init(netsnmp_container *container)
{
DEBUGMSGTL(("container:null:","in\n"));
return 0;
}
static size_t
_null_size(netsnmp_container *container)
{
DEBUGMSGTL(("container:null:size","in\n"));
return 0;
}
static void
_null_for_each(netsnmp_container *container, netsnmp_container_obj_func *f,
void *context)
{
DEBUGMSGTL(("container:null:for_each","in\n"));
}
static netsnmp_void_array *
_null_get_subset(netsnmp_container *container, void *data)
{
DEBUGMSGTL(("container:null:get_subset","in\n"));
return NULL;
}
static void
_null_clear(netsnmp_container *container, netsnmp_container_obj_func *f,
void *context)
{
DEBUGMSGTL(("container:null:clear","in\n"));
}
/**********************************************************************
*
* factory
*
*/
netsnmp_container *
netsnmp_container_get_null(void)
{
/*
* allocate memory
*/
netsnmp_container *c;
DEBUGMSGTL(("container:null:get_null","in\n"));
c = SNMP_MALLOC_TYPEDEF(netsnmp_container);
if (NULL==c) {
snmp_log(LOG_ERR, "couldn't allocate memory\n");
return NULL;
}
c->container_data = NULL;
c->get_size = _null_size;
c->init = _null_init;
c->cfree = _null_free;
c->insert = _null_insert;
c->remove = _null_remove;
c->find = _null_find;
c->find_next = _null_find_next;
c->get_subset = _null_get_subset;
c->get_iterator = NULL; /* _null_iterator; */
c->for_each = _null_for_each;
c->clear = _null_clear;
return c;
}
netsnmp_factory *
netsnmp_container_get_null_factory(void)
{
static netsnmp_factory f = { "null",
(netsnmp_factory_produce_f*)
netsnmp_container_get_null};
DEBUGMSGTL(("container:null:get_null_factory","in\n"));
return &f;
}
void
netsnmp_container_null_init(void)
{
netsnmp_container_register("null",
netsnmp_container_get_null_factory());
}
#else /* NETSNMP_FEATURE_REMOVE_CONTAINER_NULL */
netsnmp_feature_unused(container_null);
#endif /* NETSNMP_FEATURE_REMOVE_CONTAINER_NULL */
/** @} */
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