root/ext/dba/dba_dbm.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) 1997-2008 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: dba_dbm.c,v 1.29.2.1.2.2 2007/12/31 07:20:05 sebastian Exp $ */

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

#include "php.h"

#if DBA_DBM
#include "php_dbm.h"

#ifdef DBM_INCLUDE_FILE
#include DBM_INCLUDE_FILE
#endif
#if DBA_GDBM
#include "php_gdbm.h"
#endif

#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#define DBM_DATA dba_dbm_data *dba = info->dbf
#define DBM_GKEY datum gkey; gkey.dptr = (char *) key; gkey.dsize = keylen

#define TRUNC_IT(extension, mode) \
        snprintf(buf, MAXPATHLEN, "%s" extension, info->path); \
        buf[MAXPATHLEN-1] = '\0'; \
        if((fd = VCWD_OPEN_MODE(buf, O_CREAT | mode | O_WRONLY, filemode)) == -1) \
                return FAILURE; \
        close(fd);


typedef struct {
        datum nextkey;
} dba_dbm_data;

DBA_OPEN_FUNC(dbm)
{
        int fd;
        int filemode = 0644;

        if(info->argc > 0) {
                convert_to_long_ex(info->argv[0]);
                filemode = Z_LVAL_PP(info->argv[0]);
        }
        
        if(info->mode == DBA_TRUNC) {
                char buf[MAXPATHLEN];

                /* dbm/ndbm original */
                TRUNC_IT(".pag", O_TRUNC);
                TRUNC_IT(".dir", O_TRUNC);
        }

        if(info->mode == DBA_CREAT) {
                char buf[MAXPATHLEN];

                TRUNC_IT(".pag", 0);
                TRUNC_IT(".dir", 0);
        }

        if(dbminit((char *) info->path) == -1) {
                return FAILURE;
        }

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

DBA_CLOSE_FUNC(dbm)
{
        pefree(info->dbf, info->flags&DBA_PERSISTENT);
        dbmclose();
}

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

        DBM_GKEY;
        gval = fetch(gkey);
        if(gval.dptr) {
                if(newlen) *newlen = gval.dsize;
                new = estrndup(gval.dptr, gval.dsize);
        }
        return new;
}

DBA_UPDATE_FUNC(dbm)
{
        datum gval;

        DBM_GKEY;

        if (mode == 1) { /* insert */
                gval = fetch(gkey);
                if(gval.dptr) {
                        return FAILURE;
                }
        }

        gval.dptr = (char *) val;
        gval.dsize = vallen;
        
        return (store(gkey, gval) == -1 ? FAILURE : SUCCESS);
}

DBA_EXISTS_FUNC(dbm)
{
        datum gval;
        DBM_GKEY;
        
        gval = fetch(gkey);
        if(gval.dptr) {
                return SUCCESS;
        }
        return FAILURE;
}

DBA_DELETE_FUNC(dbm)
{
        DBM_GKEY;
        return(delete(gkey) == -1 ? FAILURE : SUCCESS);
}

DBA_FIRSTKEY_FUNC(dbm)
{
        DBM_DATA;
        datum gkey;
        char *key = NULL;

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

DBA_NEXTKEY_FUNC(dbm)
{
        DBM_DATA;
        datum gkey;
        char *nkey = NULL;
        
        if(!dba->nextkey.dptr) return NULL;
        
        gkey = nextkey(dba->nextkey);
        if(gkey.dptr) {
                if(newlen) *newlen = gkey.dsize;
                nkey = estrndup(gkey.dptr, gkey.dsize);
                dba->nextkey = gkey;
        } else
                dba->nextkey.dptr = NULL;
        return nkey;
}

DBA_OPTIMIZE_FUNC(dbm)
{
        /* dummy */
        return SUCCESS;
}

DBA_SYNC_FUNC(dbm)
{
        return SUCCESS;
}

DBA_INFO_FUNC(dbm)
{
#if DBA_GDBM
        if (!strcmp(DBM_VERSION, "GDBM"))
        {
                return dba_info_gdbm(hnd, info TSRMLS_CC);
        }
#endif
        return estrdup(DBM_VERSION);
}

#endif

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