transmission/libtransmission/list.c

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/*
* This file Copyright (C) 2007 Charles Kerr <charles@rebelbase.com>
*
* This file is licensed by the GPL version 2. Works owned by the
* Transmission project are granted a special exemption to clause 2(b)
* so that the bulk of its code can remain under the MIT license.
* This exemption does not extend to derived works not owned by
* the Transmission project.
*/
#include "transmission.h"
#include "list.h"
#include "utils.h"
static tr_list_t*
node_alloc( void )
{
return tr_new0( tr_list_t, 1 );
}
static void
node_free( tr_list_t* node )
{
tr_free( node );
}
/***
****
***/
void
tr_list_free( tr_list_t* list )
{
while( list )
{
tr_list_t * node = list;
list = list->next;
node_free( node );
}
}
tr_list_t*
tr_list_prepend( tr_list_t * list, void * data )
{
tr_list_t * node = node_alloc ();
node->data = data;
node->next = list;
if( list )
list->prev = node;
return node;
}
tr_list_t*
tr_list_append( tr_list_t * list, void * data )
{
tr_list_t * node = node_alloc( );
node->data = data;
if( !list )
return node;
else {
tr_list_t * l = list;
while( l->next )
l = l->next;
l->next = node;
node->prev = l;
return list;
}
}
tr_list_t*
tr_list_find_data ( tr_list_t * list, const void * data )
{
for(; list; list=list->next )
if( list->data == data )
return list;
return NULL;
}
tr_list_t*
tr_list_remove_data ( tr_list_t * list, const void * data )
{
tr_list_t * node = tr_list_find_data( list, data );
tr_list_t * prev = node ? node->prev : NULL;
tr_list_t * next = node ? node->next : NULL;
if( prev ) prev->next = next;
if( next ) next->prev = prev;
if( list == node ) list = next;
node_free( node );
return list;
}
tr_list_t*
tr_list_find ( tr_list_t * list , TrListCompareFunc func, const void * b )
{
for( ; list; list=list->next )
if( !func( list->data, b ) )
return list;
return NULL;
}
void
tr_list_foreach( tr_list_t * list, TrListForeachFunc func )
{
while( list )
{
func( list->data );
list = list->next;
}
}