146 lines
4.2 KiB
C
146 lines
4.2 KiB
C
/******************************************************************************
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* $Id$
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*
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* Copyright (c) 2007 Transmission authors and contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*****************************************************************************/
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#include "bsdtree.h"
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typedef struct tr_peertree_entry_s
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{
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RB_ENTRY( tr_peertree_entry_s ) magic;
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uint8_t peer[6];
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} tr_peertree_entry_t;
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typedef
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RB_HEAD( tr_peertree_s, tr_peertree_entry_s )
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tr_peertree_t;
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#define peertreeInit(tree) RB_INIT( (tree) )
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#define peertreeEmpty(tree) RB_EMPTY( (tree) )
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#define peertreeFirst(tree) RB_MIN( tr_peertree_s, (tree) )
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#define peertreeNext(tree, item) RB_NEXT( tr_peertree_s, (tree), (item) )
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#define peertreeFind(tree, item) RB_FIND( tr_peertree_s, (tree), (item) )
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static int
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peertreekeycmp( tr_peertree_entry_t * aa, tr_peertree_entry_t * bb )
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{
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return memcmp( aa->peer, bb->peer, 6 );
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}
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RB_GENERATE_STATIC( tr_peertree_s, tr_peertree_entry_s, magic, peertreekeycmp )
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static int
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peertreeCount( tr_peertree_t * tree )
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{
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tr_peertree_entry_t * ii;
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int count;
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count = 0;
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RB_FOREACH( ii, tr_peertree_s, tree )
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{
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count++;
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}
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return count;
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}
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static tr_peertree_entry_t *
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peertreeGet( tr_peertree_t * tree, struct in_addr * addr, tr_port_t port )
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{
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tr_peertree_entry_t entry;
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memset( &entry, 0, sizeof( entry ) );
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memcpy( entry.peer, addr, 4 );
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memcpy( entry.peer + 4, &port, 2 );
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return RB_FIND( tr_peertree_s, tree, &entry );
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}
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static tr_peertree_entry_t *
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peertreeAdd( tr_peertree_t * tree, struct in_addr * addr, tr_port_t port )
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{
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tr_peertree_entry_t * entry;
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entry = calloc( 1, sizeof( *entry) );
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if( NULL == entry )
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{
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return NULL;
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}
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memcpy( entry->peer, addr, 4 );
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memcpy( entry->peer + 4, &port, 2 );
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if( NULL == RB_INSERT( tr_peertree_s, tree, entry ) )
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{
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return entry;
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}
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free( entry );
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return NULL;
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}
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static void
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peertreeMove( tr_peertree_t * dest, tr_peertree_t * src,
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tr_peertree_entry_t * entry )
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{
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tr_peertree_entry_t * sanity;
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sanity = RB_REMOVE( tr_peertree_s, src, entry );
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assert( sanity == entry );
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sanity = RB_INSERT( tr_peertree_s, dest, entry );
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assert( NULL == sanity );
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}
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static void
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peertreeMerge( tr_peertree_t * dest, tr_peertree_t * src )
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{
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tr_peertree_entry_t * ii, * next, * sanity;
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for( ii = peertreeFirst( src ); NULL != ii; ii = next )
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{
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next = peertreeNext( src, ii );
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sanity = RB_REMOVE( tr_peertree_s, src, ii );
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assert( sanity == ii );
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sanity = RB_INSERT( tr_peertree_s, dest, ii );
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assert( NULL == sanity );
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}
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}
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static void
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peertreeSwap( tr_peertree_t * dest, tr_peertree_t * src )
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{
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tr_peertree_t buf;
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RB_ROOT( &buf ) = RB_ROOT( dest );
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RB_ROOT( dest ) = RB_ROOT( src );
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RB_ROOT( src ) = RB_ROOT( &buf );
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}
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static void
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peertreeFree( tr_peertree_t * tree )
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{
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tr_peertree_entry_t * ii, * next;
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for( ii = RB_MIN( tr_peertree_s, tree ); NULL != ii; ii = next )
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{
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next = RB_NEXT( tr_peertree_s, tree, ii );
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RB_REMOVE( tr_peertree_s, tree, ii );
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free( ii );
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}
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}
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