metautil.h
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上传日期:2007-06-06
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- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #ifndef METAUTIL_H
- #define METATUIL_H
- /*
- * Users of the IHXFileFormatObject interface can request
- * meta info from the file format by passing in the
- * string "AcceptMetaInfo" in the request header.
- * This property, if present, is either a delimited
- * list of requested property names or the string "*".
- * If the string is "*", then all available meta info
- * is requested. The delimiter can be either a comma
- * or a semi-colon. All meta info requested (or all
- * available if AcceptMetaInfo = "*") will then be
- * placed in the file header returned asynchronously
- * to the IHXFileFormatObject::GetFileHeader() call.
- *
- * In the function below, an IHXRequest is passed
- * in. If HX_RESULT returns HXR_OK, then the other
- * variables passed in by referenced can then be
- * examined in this order:
- *
- * If "AcceptMetaInfo" is present in the request headers,
- * then rbAcceptMetaInfoPresent will be TRUE. Otherwise,
- * it will be FALSE and rbAllMetaInfoRequested and
- * rpRequestedMetaInfo will not be altered.
- *
- * If rbAcceptMetaInfoPresent is TRUE and
- * AcceptMetaInfo = "*", then rbAllMetaInfoRequested
- * will be TRUE and rpRequestedMetaInfo will be NULL.
- *
- * If rbAcceptMetaInfoPresent is TRUE and
- * AcceptMetaInfo is a delimited string of property
- * names, then rbAllMetaInfoRequested will be FALSE
- * and rpRequestedMetaInfo will be non-NULL and will
- * contain this list of property names as ULONG32
- * properties. These property names can then be retrieved
- * by using the IHXValues::GetFirstPropertyULONG32()
- * and IHXValues::GetNextPropertyULONG32() calls.
- * Note that this does not imply that the properties
- * are necessarily ULONG32 properties - it's just
- * more convenient to make them ULONG32 properties
- * than CString or Buffer properties.
- */
- HX_RESULT CheckMetaInfoRequest(IHXRequest* pRequest,
- IHXCommonClassFactory* pFactory,
- REF(BOOL) rbAcceptMetaInfoPresent,
- REF(BOOL) rbAllMetaInfoRequested,
- REF(IHXValues*) rpRequestedMetaInfo);
- #endif /* #ifndef METAUTIL_H */