htatom.cc

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/* 
 *      HT Editor
 *      htatom.cc
 *
 *      Copyright (C) 1999-2002 Stefan Weyergraf (stefan@weyergraf.de)
 *
 *      This program is free software; you can redistribute it and/or modify
 *      it under the terms of the GNU General Public License version 2 as
 *      published by the Free Software Foundation.
 *
 *      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, write to the Free Software
 *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "htatom.h"
#include "htdata.h"

#include <string.h>

ht_stree *atoms;

void *find_atom(HT_ATOM atom)
{
        if (atom) {             // atom 0 is special !
                ht_data_uint a(atom);
                ht_data_ptr *d=(ht_data_ptr*)atoms->get(&a);
                if (d) return (void*)d->value;
        }
        return NULL;
}

HT_ATOM find_atom_rev(const void *data)
{
        if (data) {
                ht_data_uint *key=NULL;
                ht_data_ptr *value;
                while ((key=(ht_data_uint*)atoms->enum_next((Object**)&value, key))) {
                        if (value->value==data) return key->value;
                }
        }
        return 0;
}

bool register_atom(HT_ATOM atom, const void *data)
{
        if (!find_atom(atom)) {
                atoms->insert(new ht_data_uint(atom), new ht_data_ptr(data));
                return true;
        }
        return false;
}

bool unregister_atom(HT_ATOM atom)
{
        ht_data_uint a(atom);
        atoms->del(&a);
        return true;
}

/*
 *      INIT
 */
 
bool init_atom()
{
        atoms=new ht_stree();
        atoms->init(compare_keys_uint);
        return true;
} 
 
/*
 *      DONE
 */
 
void done_atom()
{
        atoms->destroy();
        delete atoms;
}

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