/*
* Copyright (c) 1985 Corporation for Research and Educational Networking
* Copyright (c) 1988 University of Illinois Board of Trustees, Steven
*              Dorner, and Paul Pomes
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the Corporation for
*      Research and Educational Networking (CREN), the University of
*      Illinois at Urbana, and their contributors.
* 4. Neither the name of CREN, the University nor the names of their
*    contributors may be used to endorse or promote products derived from
*    this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE TRUSTEES AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE TRUSTEES OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef lint
static char  RcsId[] = "@(#)$Id: id.c,v 1.8 1994/03/12 00:59:25 paul Exp $";
#endif

#include <stdio.h>
#include <ndbm.h>
#include <sys/types.h>
#include <fcntl.h>
#include <sys/file.h>

static DBM *db;

/*
* initialize the id database
*/
IdInit(dbName)
       char *dbName;
{
       if ((db = dbm_open(dbName, O_RDWR | O_CREAT, 0660)) == NULL)
               return (1);

       srand(time(0));
       return (0);
}

/*
* make the database go away
*/
IdDone()
{
       dbm_close(db);
}

/*
* assign an id number to an UVID
*/
char    *
AssignId(uvid)
       char    *uvid;
{
       datum    key;
       datum    rec;
       int      id;
       static char scratch[40];

       key.dptr = uvid;
       key.dsize = strlen(uvid) + 1;

       rec = dbm_fetch(db, key);
       if (rec.dptr)
               return (NULL);

       rec.dptr = scratch;

       do
       {
               id = rand() + 10000000;
               sprintf(scratch, "%c%d", strncmp(uvid, "000", 3) ? 'i' : 't', id);
               rec.dsize = strlen(scratch) + 1;
       }
       while (dbm_store(db, rec, key, DBM_INSERT) != 0);
       dbm_store(db, key, rec, DBM_INSERT);
       return (scratch);
}

/*
* given an uvid, find an id, or vice-versa
*/
char    *
FindId(id)
       char    *id;
{
       static datum key, rec;

       key.dptr = id;
       key.dsize = strlen(id) + 1;

       rec = dbm_fetch(db, key);

       return (rec.dptr);
}

/*
* Dump the database
*/
DumpId()
{
       datum    key, rec;
       char     scratch[256];

       for (key = dbm_firstkey(db); key.dptr; key = dbm_nextkey(db))
       {
               strcpy(scratch, key.dptr);
               key.dptr = scratch;
               rec = dbm_fetch(db, key);
               if (rec.dptr)
                       printf("%s:%s\n", key.dptr, rec.dptr);
               else
                       printf("%s:not found\n", key.dptr);
       }
}