int idmef_message_get_data(idmef_message_t *message, const char *path, unsigned char **data, size_t *size)
{
        int ret;
        idmef_data_t *dp;
        idmef_value_t *iv;

        ret = idmef_message_get_value(message, path, &iv);
        if ( ret <= 0 )
                return ret;

        if ( idmef_value_get_type(iv) != IDMEF_VALUE_TYPE_DATA || ! (dp = idmef_value_get_data(iv)) ) {
                ret = -1;
                goto err;
        }

        *size = idmef_data_get_len(dp);
        *data = malloc(*size);
        if ( ! *data ) {
                ret = -1;
                goto err;
        }

        memcpy(*data, idmef_data_get_data(dp), *size);

err:
        idmef_value_destroy(iv);
        return ret;
}
/**
 * idmef_message_get_string:
 * @message: Pointer to an #idmef_message_t object.
 * @path: Path to retrieve the string from within @message.
 * @result: Pointer where the result should be stored.
 *
 * Retrieve the string stored within @path of @message and store it
 * in the user provided @result.
 *
 * The caller is responssible for freeing @result.
 *
 * Returns: A positive value in case @path was successfully retrieved
 * 0 if the path is empty, or a negative value if an error occured.
 */
int idmef_message_get_string(idmef_message_t *message, const char *path, char **result)
{
        int ret;
        idmef_value_t *iv;
        prelude_string_t *str;

        ret = idmef_message_get_value(message, path, &iv);
        if ( ret <= 0 )
                return ret;

        if ( idmef_value_get_type(iv) != IDMEF_VALUE_TYPE_STRING ) {
                ret = _idmef_value_cast(iv, IDMEF_VALUE_TYPE_STRING, 0);
                if ( ret < 0 )
                        goto err;
        }

        if ( ! (str = idmef_value_get_string(iv)) ) {
                ret = -1;
                goto err;
        }

        ret = prelude_string_get_string_released(str, result);

err:
        idmef_value_destroy(iv);
        return ret;
}
/**
 * idmef_message_get_string:
 * @message: Pointer to an #idmef_message_t object.
 * @path: Path to retrieve the string from within @message.
 * @result: Pointer where the result should be stored.
 *
 * Retrieve the string stored within @path of @message and store it
 * in the user provided @result.
 *
 * The caller is responssible for freeing @result.
 *
 * Returns: A positive value in case @path was successfully retrieved
 * 0 if the path is empty, or a negative value if an error occured.
 */
int idmef_message_get_string(idmef_message_t *message, const char *path, char **result)
{
    int ret;
    idmef_value_t *iv;
    prelude_string_t *str;

    ret = idmef_message_get_value(message, path, &iv);
    if ( ret <= 0 )
        return ret;

    if ( idmef_value_get_type(iv) != IDMEF_VALUE_TYPE_STRING ) {
        ret = _idmef_value_cast(iv, IDMEF_VALUE_TYPE_STRING, 0);
        if ( ret < 0 )
            goto err;
    }

    if ( ! (str = idmef_value_get_string(iv)) ) {
        ret = -1;
        goto err;
    }

    if ( prelude_string_is_empty(str) ) {
        *result = NULL;
        return 0;
    }

    *result = strdup(prelude_string_get_string(str));
    ret = prelude_string_get_len(str);

err:
    idmef_value_destroy(iv);
    return ret;
}
/**
 * idmef_message_get_number:
 * @message: Pointer to an #idmef_message_t object.
 * @path: Path to retrieve the number from within @message.
 * @result: Pointer where the result should be stored.
 *
 * Retrieve the number stored within @path of @message and store it
 * in the user provided @result.
 *
 * Returns: A positive value in case @path was successfully retrieved
 * 0 if the path is empty, or a negative value if an error occured.
 */
int idmef_message_get_number(idmef_message_t *message, const char *path, double *result)
{
        int ret;
        idmef_value_t *iv;

        ret = idmef_message_get_value(message, path, &iv);
        if ( ret <= 0 )
                return ret;

        if ( idmef_value_get_type(iv) != IDMEF_VALUE_TYPE_DOUBLE ) {
                ret = _idmef_value_cast(iv, IDMEF_VALUE_TYPE_DOUBLE, 0);
                if ( ret < 0 )
                        goto err;
        }

        *result = idmef_value_get_double(iv);

err:
        idmef_value_destroy(iv);
        return ret;
}