root/ext/dba/dba_gdbm.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_GDBM
#include "php_gdbm.h"

#ifdef GDBM_INCLUDE_FILE
#include GDBM_INCLUDE_FILE
#endif

#define GDBM_DATA dba_gdbm_data *dba = info->dbf
#define GDBM_GKEY datum gkey; gkey.dptr = (char *) key; gkey.dsize = keylen

typedef struct {
        GDBM_FILE dbf;
        datum nextkey;
} dba_gdbm_data;

DBA_OPEN_FUNC(gdbm)
{
        GDBM_FILE dbf;
        int gmode = 0;
        int filemode = 0644;

        gmode = info->mode == DBA_READER ? GDBM_READER :
                info->mode == DBA_WRITER ? GDBM_WRITER : 
                info->mode == DBA_CREAT  ? GDBM_WRCREAT : 
                info->mode == DBA_TRUNC ? GDBM_NEWDB : -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]);
        }

        dbf = gdbm_open(info->path, 0, gmode, filemode, NULL);
        
        if(dbf) {
                info->dbf = pemalloc(sizeof(dba_gdbm_data), info->flags&DBA_PERSISTENT);
                memset(info->dbf, 0, sizeof(dba_gdbm_data));
                ((dba_gdbm_data *) info->dbf)->dbf = dbf;
                return SUCCESS;
        }
        *error = gdbm_strerror(gdbm_errno);
        return FAILURE;
}

DBA_CLOSE_FUNC(gdbm)
{
        GDBM_DATA;
        
        if(dba->nextkey.dptr) free(dba->nextkey.dptr);
        gdbm_close(dba->dbf);
        pefree(dba, info->flags&DBA_PERSISTENT);
}

DBA_FETCH_FUNC(gdbm)
{
        GDBM_DATA;
        datum gval;
        char *new = NULL;

        GDBM_GKEY;
        gval = gdbm_fetch(dba->dbf, gkey);
        if(gval.dptr) {
                if(newlen) *newlen = gval.dsize;
                new = estrndup(gval.dptr, gval.dsize);
                free(gval.dptr);
        }
        return new;
}

DBA_UPDATE_FUNC(gdbm)
{
        datum gval;
        GDBM_DATA;

        GDBM_GKEY;
        gval.dptr = (char *) val;
        gval.dsize = vallen;

        switch (gdbm_store(dba->dbf, gkey, gval, mode == 1 ? GDBM_INSERT : GDBM_REPLACE)) {
                case 0:
                        return SUCCESS;
                case 1:
                        return FAILURE;
                case -1:
                        php_error_docref2(NULL TSRMLS_CC, key, val, E_WARNING, "%s", gdbm_strerror(gdbm_errno));
                        return FAILURE;
                default:
                        php_error_docref2(NULL TSRMLS_CC, key, val, E_WARNING, "Unknown return value");
                        return FAILURE;
        }
}

DBA_EXISTS_FUNC(gdbm)
{
        GDBM_DATA;
        GDBM_GKEY;

        return gdbm_exists(dba->dbf, gkey) ? SUCCESS : FAILURE;
}

DBA_DELETE_FUNC(gdbm)
{
        GDBM_DATA;
        GDBM_GKEY;
        
        return gdbm_delete(dba->dbf, gkey) == -1 ? FAILURE : SUCCESS;
}

DBA_FIRSTKEY_FUNC(gdbm)
{
        GDBM_DATA;
        datum gkey;
        char *key = NULL;

        if(dba->nextkey.dptr) {
                free(dba->nextkey.dptr);
        }
        
        gkey = gdbm_firstkey(dba->dbf);
        if(gkey.dptr) {
                key = estrndup(gkey.dptr, gkey.dsize);
                if(newlen) *newlen = gkey.dsize;
                dba->nextkey = gkey;
        } else {
                dba->nextkey.dptr = NULL;
        }
        return key;
}

DBA_NEXTKEY_FUNC(gdbm)
{
        GDBM_DATA;
        char *nkey = NULL;
        datum gkey;

        if(!dba->nextkey.dptr) return NULL;
        
        gkey = gdbm_nextkey(dba->dbf, dba->nextkey);
        free(dba->nextkey.dptr);
        if(gkey.dptr) {
                nkey = estrndup(gkey.dptr, gkey.dsize);
                if(newlen) *newlen = gkey.dsize;
                dba->nextkey = gkey;
        } else {
                dba->nextkey.dptr = NULL;
        }
        return nkey;
}

DBA_OPTIMIZE_FUNC(gdbm)
{
        GDBM_DATA;
        gdbm_reorganize(dba->dbf);
        return SUCCESS;
}

DBA_SYNC_FUNC(gdbm) 
{
        GDBM_DATA;

        gdbm_sync(dba->dbf);
        return SUCCESS;
}

DBA_INFO_FUNC(gdbm)
{
        return estrdup(gdbm_version);
}

#endif

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