## root/libutil/defined.c

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## DEFINITIONS

This source file includes following definitions.

1. defined

    /*
     * Copyright (c) 1998, 1999, 2000, 2001
     *      Tama Communications Corporation
     *
     * This file is part of GNU GLOBAL.
     *
     * 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/>.
     */

    #ifdef HAVE_CONFIG_H
    #include <config.h>
    #endif
    #ifdef STDC_HEADERS
    #include <stdlib.h>
    #endif

    #include "die.h"
    #include "dbop.h"
    #include "defined.h"
    #include "makepath.h"

    static DBOP *dbop = NULL;

    /*
     * Tag command that supports referenced tag must call this function
     * to decide whether or not the tag is defined.
     */
    int
    defined(const char *name)
    {
            if (dbop == NULL) {
                    const char *dbpath;

                    /*
                     * gtags(1) set GTAGSDBPATH to the path GTAGS exist.
                     */
                    if (!(dbpath = getenv("GTAGSDBPATH")))
                            dbpath = ".";
                    dbop = dbop_open(makepath(dbpath, "GTAGS", NULL), 0, 0, 0);
                    if (dbop == NULL)
                            die("'GTAGS' not found.");
            }
            if (dbop_get(dbop, name))
                    return 1;
            return 0;
    }

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