root/ext/dba/dba_db2.c

DEFINITIONS

1. DBA_OPEN_FUNC
2. DBA_CLOSE_FUNC
3. DBA_FETCH_FUNC
4. DBA_UPDATE_FUNC
5. DBA_EXISTS_FUNC
6. DBA_DELETE_FUNC
7. DBA_FIRSTKEY_FUNC
8. DBA_NEXTKEY_FUNC
9. DBA_OPTIMIZE_FUNC
10. DBA_SYNC_FUNC
11. DBA_INFO_FUNC

/*
   +----------------------------------------------------------------------+
   | PHP Version 5                                                        |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997-2013 The PHP Group                                |
   +----------------------------------------------------------------------+
   | This source file is subject to version 3.01 of the PHP license,      |
   | that is bundled with this package in the file LICENSE, and is        |
   | available through the world-wide-web at the following url:           |
   | http://www.php.net/license/3_01.txt                                  |
   | If you did not receive a copy of the PHP license and are unable to   |
   | obtain it through the world-wide-web, please send a note to          |
   | license@php.net so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Author: Sascha Schumann <sascha@schumann.cx>                         |
   +----------------------------------------------------------------------+
 */

/* $Id$ */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "php.h"

#if DBA_DB2
#include "php_db2.h"
#include <sys/stat.h>

#include <string.h>
#ifdef DB2_INCLUDE_FILE
#include DB2_INCLUDE_FILE
#endif

#define DB2_DATA dba_db2_data *dba = info->dbf
#define DB2_GKEY \
        DBT gkey = {0}; \
        gkey.data = (char *) key; \
        gkey.size = keylen

typedef struct {
        DB *dbp;
        DBC *cursor;
} dba_db2_data;

DBA_OPEN_FUNC(db2)
{
        DB *dbp;
        DBTYPE type;
        int gmode = 0;
        int filemode = 0644;
        struct stat check_stat;
        int s = VCWD_STAT(info->path, &check_stat);

        if (!s && !check_stat.st_size) {
                info->mode = DBA_TRUNC; /* force truncate */
        }

        type = info->mode == DBA_READER ? DB_UNKNOWN :
                info->mode == DBA_TRUNC ? DB_BTREE :
                s ? DB_BTREE : DB_UNKNOWN;
          
        gmode = info->mode == DBA_READER ? DB_RDONLY :
                (info->mode == DBA_CREAT && s) ? DB_CREATE : 
                (info->mode == DBA_CREAT && !s) ? 0 :
                info->mode == DBA_WRITER ? 0         : 
                info->mode == DBA_TRUNC ? DB_CREATE | DB_TRUNCATE : -1;

        if (gmode == -1) {
                return FAILURE;/* not possible */
        }

        if (info->argc > 0) {
                convert_to_long_ex(info->argv[0]);
                filemode = Z_LVAL_PP(info->argv[0]);
        }

        if (db_open(info->path, type, gmode, filemode, NULL, NULL, &dbp)) {
                return FAILURE;
        }

        info->dbf = pemalloc(sizeof(dba_db2_data), info->flags&DBA_PERSISTENT);
        memset(info->dbf, 0, sizeof(dba_db2_data));
        ((dba_db2_data *) info->dbf)->dbp = dbp;
        return SUCCESS;
}

DBA_CLOSE_FUNC(db2)
{
        DB2_DATA;
        
        if (dba->cursor) 
                dba->cursor->c_close(dba->cursor);
        dba->dbp->close(dba->dbp, 0);
        pefree(dba, info->flags&DBA_PERSISTENT);
}

DBA_FETCH_FUNC(db2)
{
        DBT gval = {0};
        DB2_DATA;
        DB2_GKEY;
        
        if (dba->dbp->get(dba->dbp, NULL, &gkey, &gval, 0)) {
                return NULL;
        }

        if (newlen) *newlen = gval.size;
        return estrndup(gval.data, gval.size);
}

DBA_UPDATE_FUNC(db2)
{
        DBT gval = {0};
        DB2_DATA;
        DB2_GKEY;
        
        gval.data = (char *) val;
        gval.size = vallen;

        if (dba->dbp->put(dba->dbp, NULL, &gkey, &gval, 
                                mode == 1 ? DB_NOOVERWRITE : 0)) {
                return FAILURE;
        }
        return SUCCESS;
}

DBA_EXISTS_FUNC(db2)
{
        DBT gval = {0};
        DB2_DATA;
        DB2_GKEY;
        
        if (dba->dbp->get(dba->dbp, NULL, &gkey, &gval, 0)) {
                return FAILURE;
        }
        return SUCCESS;
}

DBA_DELETE_FUNC(db2)
{
        DB2_DATA;
        DB2_GKEY;

        return dba->dbp->del(dba->dbp, NULL, &gkey, 0) ? FAILURE : SUCCESS;
}

DBA_FIRSTKEY_FUNC(db2)
{
        DB2_DATA;

        if (dba->cursor) {
                dba->cursor->c_close(dba->cursor);
                dba->cursor = NULL;
        }

#if (DB_VERSION_MAJOR > 2) || (DB_VERSION_MAJOR == 2 && DB_VERSION_MINOR > 6) || (DB_VERSION_MAJOR == 2 && DB_VERSION_MINOR == 6 && DB_VERSION_PATCH >= 4)
        if (dba->dbp->cursor(dba->dbp, NULL, &dba->cursor, 0)) {
#else
        if (dba->dbp->cursor(dba->dbp, NULL, &dba->cursor)) {
#endif
                return NULL;
        }

        /* we should introduce something like PARAM_PASSTHRU... */
        return dba_nextkey_db2(info, newlen TSRMLS_CC);
}

DBA_NEXTKEY_FUNC(db2)
{
        DB2_DATA;
        DBT gkey = {0}, gval = {0};

        if (dba->cursor->c_get(dba->cursor, &gkey, &gval, DB_NEXT)
                        || !gkey.data)
                return NULL;

        if (newlen) *newlen = gkey.size;
        return estrndup(gkey.data, gkey.size);
}

DBA_OPTIMIZE_FUNC(db2)
{
        return SUCCESS;
}

DBA_SYNC_FUNC(db2)
{
        DB2_DATA;

        return dba->dbp->sync(dba->dbp, 0) ? FAILURE : SUCCESS;
}

DBA_INFO_FUNC(db2)
{
        return estrdup(DB_VERSION_STRING);
}

#endif

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