dba_db1.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: Shen Cheng-Da <cdsheen@gmail.com>                            |
   +----------------------------------------------------------------------+
 */
 
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
 
#include "php.h"
 
#ifdef DBA_DB1
#include "php_db1.h"
 
#ifdef DB1_INCLUDE_FILE
#include DB1_INCLUDE_FILE
#endif
 
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
 
typedef struct {
    DB  *dbp;
} dba_db1_data;
 
DBA_OPEN_FUNC(db1)
{
    dba_db1_data    *dba;
    DB        *db;
 
    int gmode;
    int filemode = info->file_permission;
 
    gmode = 0;
    switch (info->mode) {
        case DBA_READER:
            gmode = O_RDONLY;
            break;
        case DBA_WRITER:
            gmode = O_RDWR;
            break;
        case DBA_CREAT:
            gmode = O_RDWR | O_CREAT;
            break;
        case DBA_TRUNC:
            gmode = O_RDWR | O_CREAT | O_TRUNC;
            break;
        default:
            return FAILURE; /* not possible */
    }
 
    db = dbopen((char *)ZSTR_VAL(info->path), gmode, filemode, DB_HASH, NULL);
 
    if (db == NULL) {
        return FAILURE;
    }
 
    dba = pemalloc(sizeof(*dba), info->flags&DBA_PERSISTENT);
    dba->dbp = db;
 
    info->dbf = dba;
 
    return SUCCESS;
}
 
DBA_CLOSE_FUNC(db1)
{
    dba_db1_data *dba = info->dbf;
    dba->dbp->close(dba->dbp);
    pefree(info->dbf, info->flags&DBA_PERSISTENT);
}
 
DBA_FETCH_FUNC(db1)
{
    dba_db1_data *dba = info->dbf;
    DBT gval;
    DBT gkey;
 
    gkey.data = ZSTR_VAL(key);
    gkey.size = ZSTR_LEN(key);
 
    memset(&gval, 0, sizeof(gval));
    if (dba->dbp->get(dba->dbp, &gkey, &gval, 0) == RET_SUCCESS) {
        return zend_string_init(gval.data, gval.size, /* persistent */ false);
    }
    return NULL;
}
 
DBA_UPDATE_FUNC(db1)
{
    dba_db1_data *dba = info->dbf;
    DBT gval;
    DBT gkey;
 
    gkey.data = ZSTR_VAL(key);
    gkey.size = ZSTR_LEN(key);
 
    gval.data = ZSTR_VAL(val);
    gval.size = ZSTR_LEN(val);
 
    return dba->dbp->put(dba->dbp, &gkey, &gval, mode == 1 ? R_NOOVERWRITE : 0) != RET_SUCCESS ? FAILURE : SUCCESS;
}
 
DBA_EXISTS_FUNC(db1)
{
    dba_db1_data *dba = info->dbf;
    DBT gval;
    DBT gkey;
 
    gkey.data = ZSTR_VAL(key);
    gkey.size = ZSTR_LEN(key);
 
    return dba->dbp->get(dba->dbp, &gkey, &gval, 0) != RET_SUCCESS ? FAILURE : SUCCESS;
}
 
DBA_DELETE_FUNC(db1)
{
    dba_db1_data *dba = info->dbf;
    DBT gkey;
 
    gkey.data = ZSTR_VAL(key);
    gkey.size = ZSTR_LEN(key);
 
    return dba->dbp->del(dba->dbp, &gkey, 0) != RET_SUCCESS ? FAILURE : SUCCESS;
}
 
DBA_FIRSTKEY_FUNC(db1)
{
    dba_db1_data *dba = info->dbf;
    DBT gkey;
    DBT gval;
 
    memset(&gkey, 0, sizeof(gkey));
    memset(&gval, 0, sizeof(gval));
 
    if (dba->dbp->seq(dba->dbp, &gkey, &gval, R_FIRST) == RET_SUCCESS) {
        return zend_string_init(gkey.data, gkey.size, /* persistent */ false);
    }
    return NULL;
}
 
DBA_NEXTKEY_FUNC(db1)
{
    dba_db1_data *dba = info->dbf;
    DBT gkey;
    DBT gval;
 
    memset(&gkey, 0, sizeof(gkey));
    memset(&gval, 0, sizeof(gval));
 
    if (dba->dbp->seq(dba->dbp, &gkey, &gval, R_NEXT) == RET_SUCCESS) {
        return zend_string_init(gkey.data, gkey.size, /* persistent */ false);
    }
    return NULL;
}
 
DBA_OPTIMIZE_FUNC(db1)
{
    /* dummy */
    return SUCCESS;
}
 
DBA_SYNC_FUNC(db1)
{
    return SUCCESS;
}
 
DBA_INFO_FUNC(db1)
{
    return estrdup(DB1_VERSION);
}
 
#endif