/*
 * Copyright 2009 Huw Davies
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

import "oaidl.idl";
import "ocidl.idl";
import "oledb.idl";

[
    object,
    pointer_default(unique),
    uuid(0c733a8d-2a1c-11ce-ade5-00aa0044773d)
]
interface IDataConvert : IUnknown
{
    typedef DWORD DBDATACONVERT;

    enum DBDATACONVERTENUM
    {
        DBDATACONVERT_DEFAULT = 0,
        DBDATACONVERT_SETDATABEHAVIOR = 1,
        DBDATACONVERT_LENGTHFROMNTS = 2,
        DBDATACONVERT_DSTISFIXEDLENGTH = 4,
        DBDATACONVERT_DECIMALSCALE = 8
    };

    [local] HRESULT DataConvert([in] DBTYPE wSrcType,
                                [in] DBTYPE wDstType,
                                [in] DBLENGTH cbSrcLength,
                                [in, out] DBLENGTH *pcbDstLength,
                                [in] void *pSrc,
                                [out] void *pDst,
                                [in] DBLENGTH cbDstMaxLength,
                                [in] DBSTATUS dbsSrcStatus,
                                [out] DBSTATUS *pdbsDstStatus,
                                [in] BYTE bPrecision,
                                [in] BYTE bScale,
                                [in] DBDATACONVERT dwFlags);


    HRESULT CanConvert([in] DBTYPE wSrcType,
                       [in] DBTYPE wDstType);


    [local] HRESULT GetConversionSize([in] DBTYPE wSrcType,
                                      [in] DBTYPE wDstType,
                                      [in] DBLENGTH *pcbSrcLength,
                                      [out] DBLENGTH *pcbDstLength,
                                      [in, size_is(*pcbSrcLength)] void *pSrc);
};

[
    object,
    pointer_default(unique),
    uuid(0c733a9c-2a1c-11ce-ade5-00aa0044773d)
]
interface IDCInfo : IUnknown
{
    typedef DWORD DCINFOTYPE;

    enum DCINFOTYPEENUM
    {
        DCINFOTYPE_VERSION = 1
    };

    typedef struct tagDCINFO
    {
        DCINFOTYPE eInfoType;
        VARIANT vData;
    } DCINFO;

    HRESULT GetInfo([in] ULONG cInfo,
                    [in, size_is(cInfo)] DCINFOTYPE rgeInfoType[],
                    [out, size_is(cInfo)] DCINFO **prgInfo);

    HRESULT SetInfo([in] ULONG cInfo,
                    [in, size_is(cInfo)] DCINFO prgInfo[]);
};