root/libutil/dbop.h

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INCLUDED FROM


/*
 * Copyright (c) 1997, 1998, 1999, 2000, 2001, 2006
 *      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/>.
 */

#ifndef _DBOP_H_
#define _DBOP_H_

#include "gparam.h"
#ifdef USE_DB185_COMPAT
#include <db_185.h>
#else
#include "db.h"
#endif
#include "regex.h"
#include "strbuf.h"

#define DBOP_PAGESIZE   8192
#define VERSIONKEY      " __.VERSION"

typedef struct {
        /*
         * (1) COMMON PART
         */
        int mode;                       /* 0:read, 1:create, 2:modify */
        int openflags;                  /* flags of xxxx_open() */
        int ioflags;                    /* flags of xxxx_first() */
        char *lastdat;                  /* the data of last located record */
        int lastsize;                   /* the size of the lastdat */
        char *lastkey;                  /* the key of last located record */
        int lastkeysize;                /* the size of the key */
        regex_t *preg;                  /* compiled regular expression */
        int unread;                     /* leave record to read again */
        /*
         * (2) DB185 PART
         */
        DB *db;                         /* descripter of DB */
        char dbname[MAXPATHLEN+1];      /* dbname */
        char key[MAXKEYLEN+1];          /* key */
        int keylen;                     /* key length */
        char prev[MAXKEYLEN+1];         /* previous key value */
        int perm;                       /* file permission */
} DBOP;

/*
 * openflags
 */
#define DBOP_DUP        1               /* allow duplicate records      */
#define DBOP_REMOVE     2               /* remove file when closed      */
/*
 * ioflags
 */
#define DBOP_KEY        1               /* read key part                */
#define DBOP_PREFIX     2               /* prefixed read                */

DBOP *dbop_open(const char *, int, int, int);
const char *dbop_get(DBOP *, const char *);
void dbop_put(DBOP *, const char *, const char *);
void dbop_put_withlen(DBOP *, const char *, const char *, int);
void dbop_delete(DBOP *, const char *);
void dbop_update(DBOP *, const char *, const char *);
const char *dbop_first(DBOP *, const char *, regex_t *, int);
const char *dbop_next(DBOP *);
void dbop_unread(DBOP *);
const char *dbop_lastdat(DBOP *, int *);
const char *dbop_getflag(DBOP *);
const char *dbop_getoption(DBOP *, const char *);
void dbop_putoption(DBOP *, const char *, const char *);
int dbop_getversion(DBOP *);
void dbop_putversion(DBOP *, int);
void dbop_close(DBOP *);

#endif /* _DBOP_H_ */

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