root/ext/dba/dba_db3.c

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DEFINITIONS

This source file includes following definitions.
  1. php_dba_db3_errcall_fcn
  2. DBA_OPEN_FUNC
  3. DBA_CLOSE_FUNC
  4. DBA_FETCH_FUNC
  5. DBA_UPDATE_FUNC
  6. DBA_EXISTS_FUNC
  7. DBA_DELETE_FUNC
  8. DBA_FIRSTKEY_FUNC
  9. DBA_NEXTKEY_FUNC
  10. DBA_OPTIMIZE_FUNC
  11. DBA_SYNC_FUNC
  12. DBA_INFO_FUNC

/*
   +----------------------------------------------------------------------+
   | PHP Version 5                                                        |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997-2015 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_DB3
#include "php_db3.h"
#include <sys/stat.h>

#include <string.h>
#ifdef DB3_INCLUDE_FILE
#include DB3_INCLUDE_FILE
#else
#include <db.h>
#endif

static void php_dba_db3_errcall_fcn(const char *errpfx, char *msg)
{
        TSRMLS_FETCH();
        
        php_error_docref(NULL TSRMLS_CC, E_NOTICE, "%s%s", errpfx?errpfx:"", msg);
}

#define DB3_DATA dba_db3_data *dba = info->dbf
#define DB3_GKEY \
        DBT gkey; \
        memset(&gkey, 0, sizeof(gkey)); \
        gkey.data = (char *) key; gkey.size = keylen

typedef struct {
        DB *dbp;
        DBC *cursor;
} dba_db3_data;

DBA_OPEN_FUNC(db3)
{
        DB *dbp = NULL;
        DBTYPE type;
        int gmode = 0, err;
        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]);
        }

#ifdef DB_FCNTL_LOCKING
        gmode |= DB_FCNTL_LOCKING;
#endif

        if ((err=db_create(&dbp, NULL, 0)) == 0) {
            dbp->set_errcall(dbp, php_dba_db3_errcall_fcn);
            if ((err=dbp->open(dbp, info->path, NULL, type, gmode, filemode)) == 0) {
                        dba_db3_data *data;

                        data = pemalloc(sizeof(*data), info->flags&DBA_PERSISTENT);
                        data->dbp = dbp;
                        data->cursor = NULL;
                        info->dbf = data;
                
                        return SUCCESS;
                } else {
                        dbp->close(dbp, 0);
                        *error = db_strerror(err);
                }
        } else {
                *error = db_strerror(err);
        }

        return FAILURE;
}

DBA_CLOSE_FUNC(db3)
{
        DB3_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(db3)
{
        DBT gval;
        char *new = NULL;
        DB3_DATA;
        DB3_GKEY;
        
        memset(&gval, 0, sizeof(gval));
        if (!dba->dbp->get(dba->dbp, NULL, &gkey, &gval, 0)) {
                if (newlen) *newlen = gval.size;
                new = estrndup(gval.data, gval.size);
        }
        return new;
}

DBA_UPDATE_FUNC(db3)
{
        DBT gval;
        DB3_DATA;
        DB3_GKEY;
        
        memset(&gval, 0, sizeof(gval));
        gval.data = (char *) val;
        gval.size = vallen;

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

DBA_EXISTS_FUNC(db3)
{
        DBT gval;
        DB3_DATA;
        DB3_GKEY;
        
        memset(&gval, 0, sizeof(gval));
        if (!dba->dbp->get(dba->dbp, NULL, &gkey, &gval, 0)) {
                return SUCCESS;
        }
        return FAILURE;
}

DBA_DELETE_FUNC(db3)
{
        DB3_DATA;
        DB3_GKEY;

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

DBA_FIRSTKEY_FUNC(db3)
{
        DB3_DATA;

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

        dba->cursor = NULL;
        if (dba->dbp->cursor(dba->dbp, NULL, &dba->cursor, 0) != 0) {
                return NULL;
        }

        /* we should introduce something like PARAM_PASSTHRU... */
        return dba_nextkey_db3(info, newlen TSRMLS_CC);
}

DBA_NEXTKEY_FUNC(db3)
{
        DB3_DATA;
        DBT gkey, gval;
        char *nkey = NULL;
        
        memset(&gkey, 0, sizeof(gkey));
        memset(&gval, 0, sizeof(gval));

        if (dba->cursor->c_get(dba->cursor, &gkey, &gval, DB_NEXT) == 0) {
                if (gkey.data) {
                        nkey = estrndup(gkey.data, gkey.size);
                        if (newlen) *newlen = gkey.size;
                }
        }

        return nkey;
}

DBA_OPTIMIZE_FUNC(db3)
{
        return SUCCESS;
}

DBA_SYNC_FUNC(db3)
{
        DB3_DATA;

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

DBA_INFO_FUNC(db3)
{
        return estrdup(DB_VERSION_STRING);
}

#endif

/*
 * Local variables:
 * tab-width: 4
 * c-basic-offset: 4
 * End:
 * vim600: sw=4 ts=4 fdm=marker
 * vim<600: sw=4 ts=4
 */

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