dba_dbm.c

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/*
   +----------------------------------------------------------------------+
   | Copyright (c) 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:           |
   | https://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>                         |
   +----------------------------------------------------------------------+
 */
 
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
 
#include "php.h"
 
#ifdef DBA_DBM
#include "php_dbm.h"
 
#ifdef DBM_INCLUDE_FILE
#include DBM_INCLUDE_FILE
#endif
#ifdef DBA_GDBM
#include "php_gdbm.h"
#endif
 
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
 
#define TRUNC_IT(extension, mode) \
    snprintf(buf, MAXPATHLEN, "%s" extension, ZSTR_VAL(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 = info->file_permission;
 
    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 *) ZSTR_VAL(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;
    datum gkey;
 
    gkey.dptr = ZSTR_VAL(key);
    gkey.dsize = ZSTR_LEN(key);
    gval = fetch(gkey);
    if (gval.dptr) {
        return zend_string_init(gval.dptr, gval.dsize, /* persistent */ false);
    }
    return NULL;
}
 
DBA_UPDATE_FUNC(dbm)
{
    datum gval;
    datum gkey;
 
    gkey.dptr = ZSTR_VAL(key);
    gkey.dsize = ZSTR_LEN(key);
 
    if (mode == 1) { /* insert */
        gval = fetch(gkey);
        if (gval.dptr) {
            return FAILURE;
        }
    }
 
    gval.dptr = ZSTR_VAL(val);
    gval.dsize = ZSTR_LEN(val);
 
    return (store(gkey, gval) == -1 ? FAILURE : SUCCESS);
}
 
DBA_EXISTS_FUNC(dbm)
{
    datum gval;
    datum gkey;
 
    gkey.dptr = ZSTR_VAL(key);
    gkey.dsize = ZSTR_LEN(key);
 
    gval = fetch(gkey);
    if (gval.dptr) {
        return SUCCESS;
    }
    return FAILURE;
}
 
DBA_DELETE_FUNC(dbm)
{
    datum gkey;
 
    gkey.dptr = ZSTR_VAL(key);
    gkey.dsize = ZSTR_LEN(key);
    return(delete(gkey) == -1 ? FAILURE : SUCCESS);
}
 
DBA_FIRSTKEY_FUNC(dbm)
{
    dba_dbm_data *dba = info->dbf;
    datum gkey;
    zend_string *key = NULL;
 
    gkey = firstkey();
    if (gkey.dptr) {
        key = zend_string_init(gkey.dptr, gkey.dsize, /* persistent */ false);
        dba->nextkey = gkey;
    } else {
        dba->nextkey.dptr = NULL;
    }
    return key;
}
 
DBA_NEXTKEY_FUNC(dbm)
{
    dba_dbm_data *dba = info->dbf;
    datum gkey;
    zend_string *key = NULL;
 
    if (!dba->nextkey.dptr) { return NULL; }
 
    gkey = nextkey(dba->nextkey);
    if (gkey.dptr) {
        key = zend_string_init(gkey.dptr, gkey.dsize, /* persistent */ false);
        dba->nextkey = gkey;
    } else {
        dba->nextkey.dptr = NULL;
    }
    return key;
}
 
DBA_OPTIMIZE_FUNC(dbm)
{
    /* dummy */
    return SUCCESS;
}
 
DBA_SYNC_FUNC(dbm)
{
    return SUCCESS;
}
 
DBA_INFO_FUNC(dbm)
{
#ifdef DBA_GDBM
    if (!strcmp(DBM_VERSION, "GDBM"))
    {
        return dba_info_gdbm(hnd, info);
    }
#endif
    return estrdup(DBM_VERSION);
}
 
#endif