Esempi in C++ (Cpp) per mongo_cursor_get_more

Esempio n. 1

File: mongo.c Progetto: chitr/mongo-c-driver

MONGO_EXPORT int mongo_cursor_next( mongo_cursor *cursor ) {
    char *next_object;
    char *message_end;

    if( ! ( cursor->flags & MONGO_CURSOR_QUERY_SENT ) )
        if( mongo_cursor_op_query( cursor ) != MONGO_OK )
            return MONGO_ERROR;

    if( !cursor->reply )
        return MONGO_ERROR;

    /* no data */
    if ( cursor->reply->fields.num == 0 ) {

        /* Special case for tailable cursors. */
        if( cursor->reply->fields.cursorID ) {
            if( ( mongo_cursor_get_more( cursor ) != MONGO_OK ) ||
                    cursor->reply->fields.num == 0 ) {
                return MONGO_ERROR;
            }
        }

        else
            return MONGO_ERROR;
    }

    /* first */
    if ( cursor->current.data == NULL ) {
        bson_init_finished_data( &cursor->current, &cursor->reply->objs );
        return MONGO_OK;
    }

    next_object = cursor->current.data + bson_size( &cursor->current );
    message_end = ( char * )cursor->reply + cursor->reply->head.len;

    if ( next_object >= message_end ) {
        if( mongo_cursor_get_more( cursor ) != MONGO_OK )
            return MONGO_ERROR;

        /* If there's still a cursor id, then the message should be pending. */
        if( cursor->reply->fields.num == 0 && cursor->reply->fields.cursorID ) {
            cursor->err = MONGO_CURSOR_PENDING;
            return MONGO_ERROR;
        }

        bson_init_finished_data( &cursor->current, &cursor->reply->objs );
    } else {
        bson_init_finished_data( &cursor->current, next_object );
    }

    return MONGO_OK;
}

Esempio n. 2

File: mongo.c Progetto: Unity-Technologies/mongo-c-driver

int mongo_cursor_next(mongo_cursor* cursor){
    char *next_object;
    char *message_end;
    int res;

    if( !cursor->reply )
        return MONGO_ERROR;

    /* no data */
    if ( cursor->reply->fields.num == 0 ) {

        /* Special case for tailable cursors. */
        if( cursor->reply->fields.cursorID ) {
            if( ( mongo_cursor_get_more(cursor) != MONGO_OK ) ||
                cursor->reply->fields.num == 0 ) {
                return MONGO_ERROR;
            }
        }

        else
            return MONGO_ERROR;
    }

    /* first */
    if (cursor->current.data == NULL){
        bson_init(&cursor->current, &cursor->reply->objs, 0);
        return MONGO_OK;
    }

    next_object = cursor->current.data + bson_size(&cursor->current);
    message_end = (char*)cursor->reply + cursor->reply->head.len;

    if (next_object >= message_end) {
        if( mongo_cursor_get_more(cursor) != MONGO_OK )
            return MONGO_ERROR;

        /* If there's still a cursor id, then the message should be pending.
         * TODO: be sure not to overwrite conn->err. */
        if( cursor->reply->fields.num == 0 && cursor->reply->fields.cursorID ) {
            cursor->err = MONGO_CURSOR_PENDING;
            return MONGO_ERROR;
        }

        bson_init(&cursor->current, &cursor->reply->objs, 0);
    } else {
        bson_init(&cursor->current, next_object, 0);
    }

    return MONGO_OK;
}