70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
/*
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This file is part of libcapwap.
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libcapwap is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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libcapwap is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Foobar. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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*@file
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*@brief Implementation of avliter_next
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*/
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#include "avltree.h"
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/**
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* Get the next element within an AVL Tree.
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* @param i pointer to AVL Iterator
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* @return the element or NULL if there is no next elemeent.
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*/
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void * avliter_next(avliter_t *i)
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{
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while ( i->stack_ptr) {
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i->stack_ptr--;
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i->cur=i->stack[i->stack_ptr];
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if (!i->cur)
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continue;
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if ((i->stack_ptr)&1) {
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return i->cur->data;
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}
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break;
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}
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if (!i->cur){
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return NULL;
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}
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while(i->cur->left) {
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/* push right branch */
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i->stack[i->stack_ptr++]=i->cur->right;
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/* push node */
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i->stack[i->stack_ptr++]=i->cur;
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i->cur=i->cur->left;
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}
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i->stack[i->stack_ptr++]=i->cur->right;
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return i->cur->data;
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}
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