lib/symtab.h

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//
// nis-util - NIS Administration Utilities
// Copyright (C) 2001, 2008, 2009, 2011, 2012 Peter Miller
//
// 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 2 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/>.
//

#ifndef LIB_SYMTAB_H
#define LIB_SYMTAB_H

#include <lib/rcstring.h>
#include <vector>

class symtab
{
public:
    virtual ~symtab();

    symtab();

private:
    symtab(const symtab &);

    symtab &operator=(const symtab &);

    struct row_ty
    {
        row_ty() : data(0), overflow(0) { }

        rcstring key;
        void *data;
        row_ty *overflow;
    };

    void (*reap)(void *);
    row_ty **hash_table;
    typedef rcstring::hash_ty hash_ty;
    hash_ty hash_modulus;
    hash_ty hash_cutover;
    hash_ty hash_cutover_mask;
    hash_ty hash_cutover_split_mask;
    hash_ty hash_split;
    hash_ty hash_load;

public:
    void *query(const rcstring &name) const;

    void assign(const rcstring &name, void *value);

    void remove(const rcstring &name);

    void dump(const char *caption) const;

    struct walk_t
    {
        virtual ~walk_t() {}
        virtual void action(const rcstring &key, void *value) = 0;
    };

    void walk(walk_t &);

    typedef std::vector<rcstring> key_list_t;

    key_list_t keys() const;

    void set_reaper(void(*)(void *));

private:
    void split(void);
};

// vim: set ts=8 sw=4 et :
#endif // LIB_SYMTAB_H