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/* $Id$ */
/***
This file is part of avahi.
avahi 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.
avahi 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 avahi; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#include <assert.h>
#include <avahi-common/llist.h>
#include <avahi-common/malloc.h>
#include "rrlist.h"
#include "log.h"
typedef struct AvahiRecordListItem AvahiRecordListItem;
struct AvahiRecordListItem {
int read;
AvahiRecord *record;
int unicast_response;
int flush_cache;
int auxiliary;
AVAHI_LLIST_FIELDS(AvahiRecordListItem, items);
};
struct AvahiRecordList {
AVAHI_LLIST_HEAD(AvahiRecordListItem, read);
AVAHI_LLIST_HEAD(AvahiRecordListItem, unread);
};
AvahiRecordList *avahi_record_list_new(void) {
AvahiRecordList *l;
if (!(l = avahi_new(AvahiRecordList, 1))) {
avahi_log_error("avahi_new() failed.");
return NULL;
}
AVAHI_LLIST_HEAD_INIT(AvahiRecordListItem, l->read);
AVAHI_LLIST_HEAD_INIT(AvahiRecordListItem, l->unread);
return l;
}
void avahi_record_list_free(AvahiRecordList *l) {
assert(l);
avahi_record_list_flush(l);
avahi_free(l);
}
static void item_free(AvahiRecordList *l, AvahiRecordListItem *i) {
assert(l);
assert(i);
if (i->read)
AVAHI_LLIST_REMOVE(AvahiRecordListItem, items, l->read, i);
else
AVAHI_LLIST_REMOVE(AvahiRecordListItem, items, l->unread, i);
avahi_record_unref(i->record);
avahi_free(i);
}
void avahi_record_list_flush(AvahiRecordList *l) {
assert(l);
while (l->read)
item_free(l, l->read);
while (l->unread)
item_free(l, l->unread);
}
AvahiRecord* avahi_record_list_next(AvahiRecordList *l, int *flush_cache, int *unicast_response, int *auxiliary) {
AvahiRecord *r;
AvahiRecordListItem *i;
if (!(i = l->unread))
return NULL;
assert(!i->read);
r = avahi_record_ref(i->record);
if (unicast_response)
*unicast_response = i->unicast_response;
if (flush_cache)
*flush_cache = i->flush_cache;
if (auxiliary)
*auxiliary = i->auxiliary;
AVAHI_LLIST_REMOVE(AvahiRecordListItem, items, l->unread, i);
AVAHI_LLIST_PREPEND(AvahiRecordListItem, items, l->read, i);
i->read = 1;
return r;
}
static AvahiRecordListItem *get(AvahiRecordList *l, AvahiRecord *r) {
AvahiRecordListItem *i;
assert(l);
assert(r);
for (i = l->read; i; i = i->items_next)
if (avahi_record_equal_no_ttl(i->record, r))
return i;
for (i = l->unread; i; i = i->items_next)
if (avahi_record_equal_no_ttl(i->record, r))
return i;
return NULL;
}
void avahi_record_list_push(AvahiRecordList *l, AvahiRecord *r, int flush_cache, int unicast_response, int auxiliary) {
AvahiRecordListItem *i;
assert(l);
assert(r);
if (get(l, r))
return;
if (!(i = avahi_new(AvahiRecordListItem, 1))) {
avahi_log_error("avahi_new() failed.");
return;
}
i->unicast_response = unicast_response;
i->flush_cache = flush_cache;
i->auxiliary = auxiliary;
i->record = avahi_record_ref(r);
i->read = 0;
AVAHI_LLIST_PREPEND(AvahiRecordListItem, items, l->unread, i);
}
void avahi_record_list_drop(AvahiRecordList *l, AvahiRecord *r) {
AvahiRecordListItem *i;
assert(l);
assert(r);
if (!(i = get(l, r)))
return;
item_free(l, i);
}
int avahi_record_list_is_empty(AvahiRecordList *l) {
assert(l);
return !l->unread && !l->read;
}
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