70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
|
/*
|
||
|
This file is part of libcapwap.
|
||
|
|
||
|
libcapwap is free software: you can redistribute it and/or modify
|
||
|
it under the terms of the GNU General Public License as published by
|
||
|
the Free Software Foundation, either version 3 of the License, or
|
||
|
(at your option) any later version.
|
||
|
|
||
|
libcapwap 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 General Public License for more details.
|
||
|
|
||
|
You should have received a copy of the GNU General Public License
|
||
|
along with Foobar. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
||
|
*/
|
||
|
|
||
|
/**
|
||
|
*@file
|
||
|
*@brief Implementation of mavliter_next
|
||
|
*/
|
||
|
|
||
|
#include "mavl.h"
|
||
|
|
||
|
/**
|
||
|
* Get the next element within an AVL Tree.
|
||
|
* @param i pointer to AVL Iterator
|
||
|
* @return the element or NULL if there is no next elemeent.
|
||
|
*/
|
||
|
void * mavliter_next(mavliter_t *i)
|
||
|
{
|
||
|
|
||
|
while ( i->stack_ptr) {
|
||
|
i->stack_ptr--;
|
||
|
i->cur=i->stack[i->stack_ptr];
|
||
|
|
||
|
if (!i->cur)
|
||
|
continue;
|
||
|
|
||
|
if ((i->stack_ptr)&1) {
|
||
|
return i->cur->data;
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
}
|
||
|
|
||
|
|
||
|
if (!i->cur){
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
while(i->cur->left) {
|
||
|
/* push right branch */
|
||
|
i->stack[i->stack_ptr++]=i->cur->right;
|
||
|
|
||
|
/* push node */
|
||
|
i->stack[i->stack_ptr++]=i->cur;
|
||
|
|
||
|
i->cur=i->cur->left;
|
||
|
|
||
|
}
|
||
|
|
||
|
i->stack[i->stack_ptr++]=i->cur->right;
|
||
|
|
||
|
return i->cur->data;
|
||
|
}
|
||
|
|
||
|
|