add.c
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/**
* \file
*
* \author Georg Hopp
*
* \copyright
* Copyright © 2012 Georg Hopp
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <search.h>
#include "tr/hash.h"
#include "tr/interface/hashable.h"
#include "tr/tree.h"
static
inline
int
hashAddComp(const void * a, const void * b)
{
unsigned long hash_a = TR_hashableGetHash((void*)a);
unsigned long hash_b = TR_hashableGetHash((void*)b);
if (hash_a < hash_b) {
return -1;
}
if (hash_a > hash_b) {
return 1;
}
return 0;
}
void *
TR_hashAdd(TR_Hash this, void * operand)
{
void * found = TR_treeInsert(&this->root, operand, hashAddComp);
if (NULL == found) {
return NULL;
}
if (operand != found) {
TR_hashableHandleDouble(found, operand);
TR_delete(operand);
}
return found;
}
// vim: set ts=4 sw=4: