cxx_dbc.cpp

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1997-2005
 *      Sleepycat Software.  All rights reserved.
 *
 * $Id: cxx_dbc.cpp,v 12.2 2005/09/30 07:38:25 mjc Exp $
 */

#include "db_config.h"

#include <errno.h>
#include <string.h>

#include "db_cxx.h"
#include "dbinc/cxx_int.h"

#include "db_int.h"
#include "dbinc/db_page.h"
#include "dbinc_auto/db_auto.h"
#include "dbinc_auto/crdel_auto.h"
#include "dbinc/db_dispatch.h"
#include "dbinc_auto/db_ext.h"
#include "dbinc_auto/common_ext.h"

// Helper macro for simple methods that pass through to the
// underlying C method. It may return an error or raise an exception.
// Note this macro expects that input _argspec is an argument
// list element (e.g., "char *arg") and that _arglist is the arguments
// that should be passed through to the C method (e.g., "(db, arg)")
//
#define DBC_METHOD(_name, _argspec, _arglist, _retok)                   \
int Dbc::_name _argspec                                                 \
{                                                                       \
        int ret;                                                        \
        DBC *dbc = this;                                                \
                                                                        \
        ret = dbc->c_##_name _arglist;                                  \
        if (!_retok(ret))                                               \
                DB_ERROR(DbEnv::get_DbEnv(dbc->dbp->dbenv), \
                        "Dbc::" # _name, ret, ON_ERROR_UNKNOWN); \
        return (ret);                                                   \
}

// It's private, and should never be called, but VC4.0 needs it resolved
//
Dbc::~Dbc()
{
}

DBC_METHOD(close, (void), (dbc), DB_RETOK_STD)
DBC_METHOD(count, (db_recno_t *countp, u_int32_t _flags),
    (dbc, countp, _flags), DB_RETOK_STD)
DBC_METHOD(del, (u_int32_t _flags),
    (dbc, _flags), DB_RETOK_DBCDEL)

int Dbc::dup(Dbc** cursorp, u_int32_t _flags)
{
        int ret;
        DBC *dbc = this;
        DBC *new_cursor = 0;

        ret = dbc->c_dup(dbc, &new_cursor, _flags);

        if (DB_RETOK_STD(ret))
                // The following cast implies that Dbc can be no larger than DBC
                *cursorp = (Dbc*)new_cursor;
        else
                DB_ERROR(DbEnv::get_DbEnv(dbc->dbp->dbenv),
                        "Dbc::dup", ret, ON_ERROR_UNKNOWN);

        return (ret);
}

int Dbc::get(Dbt* key, Dbt *data, u_int32_t _flags)
{
        int ret;
        DBC *dbc = this;

        ret = dbc->c_get(dbc, key, data, _flags);

        if (!DB_RETOK_DBCGET(ret)) {
                if (ret == DB_BUFFER_SMALL && DB_OVERFLOWED_DBT(key))
                        DB_ERROR_DBT(DbEnv::get_DbEnv(dbc->dbp->dbenv),
                                "Dbc::get", key, ON_ERROR_UNKNOWN);
                else if (ret == DB_BUFFER_SMALL && DB_OVERFLOWED_DBT(data))
                        DB_ERROR_DBT(DbEnv::get_DbEnv(dbc->dbp->dbenv),
                                "Dbc::get", data, ON_ERROR_UNKNOWN);
                else
                        DB_ERROR(DbEnv::get_DbEnv(dbc->dbp->dbenv),
                                "Dbc::get", ret, ON_ERROR_UNKNOWN);
        }

        return (ret);
}

int Dbc::pget(Dbt* key, Dbt *pkey, Dbt *data, u_int32_t _flags)
{
        int ret;
        DBC *dbc = this;

        ret = dbc->c_pget(dbc, key, pkey, data, _flags);

        /* Logic is the same as for Dbc::get - reusing macro. */
        if (!DB_RETOK_DBCGET(ret)) {
                if (ret == DB_BUFFER_SMALL && DB_OVERFLOWED_DBT(key))
                        DB_ERROR_DBT(DbEnv::get_DbEnv(dbc->dbp->dbenv),
                                "Dbc::pget", key, ON_ERROR_UNKNOWN);
                else if (ret == DB_BUFFER_SMALL && DB_OVERFLOWED_DBT(data))
                        DB_ERROR_DBT(DbEnv::get_DbEnv(dbc->dbp->dbenv),
                                "Dbc::pget", data, ON_ERROR_UNKNOWN);
                else
                        DB_ERROR(DbEnv::get_DbEnv(dbc->dbp->dbenv),
                                "Dbc::pget", ret, ON_ERROR_UNKNOWN);
        }

        return (ret);
}

DBC_METHOD(put, (Dbt* key, Dbt *data, u_int32_t _flags),
    (dbc, key, data, _flags), DB_RETOK_DBCPUT)

---