root/libutil/defined.c

/* */

DEFINITIONS

1. defined

   1 /*
   2  * Copyright (c) 1998, 1999, 2000, 2001
   3  *      Tama Communications Corporation
   4  *
   5  * This file is part of GNU GLOBAL.
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11  * 
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  * 
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20 
  21 #ifdef HAVE_CONFIG_H
  22 #include <config.h>
  23 #endif
  24 #ifdef STDC_HEADERS
  25 #include <stdlib.h>
  26 #endif
  27 
  28 #include "die.h"
  29 #include "dbop.h"
  30 #include "defined.h"
  31 #include "makepath.h"
  32 
  33 static DBOP *dbop = NULL;
  34 
  35 /**
  36  * Tag command that supports referenced tag must call this function
  37  * to decide whether or not the tag is defined.
  38  */
  39 int
  40 defined(const char *name)
  41 {
  42         if (dbop == NULL) {
  43                 const char *dbpath;
  44 
  45                 /*
  46                  * gtags(1) set GTAGSDBPATH to the path GTAGS exist.
  47                  */
  48                 if (!(dbpath = getenv("GTAGSDBPATH")))
  49                         dbpath = ".";
  50                 dbop = dbop_open(makepath(dbpath, "GTAGS", NULL), 0, 0, 0);
  51                 if (dbop == NULL)
  52                         die("'GTAGS' not found.");
  53         }
  54         if (dbop_get(dbop, name))
  55                 return 1;
  56         return 0;
  57 }

/* */