storage/get.c

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/**
 * \file
 *
 * \author  Georg Hopp
 *
 * \copyright
 * Copyright © 2012  Georg Hopp
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <gdbm.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>

#include "class.h"
#include "storage/storage.h"

#include "utils/memory.h"

void
storageGet(
        Storage this,
        char * _key, size_t nkey,
        char ** data, size_t * ndata)
{
    char  * key      = memMalloc(nkey);
    datum   gdbm_key = {key, nkey};
    datum   value;

    if (NULL == this) {
        *data  = NULL;
        *ndata = 0;
    }

    memcpy(key, _key, nkey);
    value = gdbm_fetch(this->gdbm, gdbm_key);
    MEM_FREE(key);

    if (NULL != value.dptr) {
        *ndata = value.dsize;
        *data  = memMalloc(value.dsize);
        memcpy(*data, value.dptr, value.dsize);

        free(value.dptr);
    } else {
        *data  = NULL;
        *ndata = 0;
    }
}

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