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/*
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* Copyright 2019, The PLANIX Project
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "mavl.h"
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void *
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mavliter_seek(struct mavliter *i ,const void *search, int mode)
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{
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i->stack_ptr = 0;
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i->cur = i->root;
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while(i->cur){
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int rc;
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rc = i->cmp(search,mavlnode_dataptr(i->cur));
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if (rc==0){
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i->stack[i->stack_ptr++] = i->cur->s[1];
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return mavlnode_dataptr(i->cur);
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}
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if (rc<0){
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if (i->cur->s[0]){
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/* push s[1] branch */
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i->stack[i->stack_ptr++] = i->cur->s[1];
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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->s[0];
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}
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else {
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i->stack[i->stack_ptr++] = i->cur->s[1];
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return mavlnode_dataptr(i->cur);
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}
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}
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else {
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if (i->cur->s[1]){
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i->cur=i->cur->s[1];
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}
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else {
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mavliter_next(i);
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return mavlnode_dataptr(i->cur);
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}
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}
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}
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return NULL;
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}
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