86 lines
2 KiB
C++
86 lines
2 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Copyright (C) 1996, Microsoft Corporation.
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//
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// File: qlibutil.hxx
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//
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// Contents: Utility macros and functions for querylib.lib
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//
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// History: 17-May-94 t-jeffc Created.
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// 02-Mar-95 t-colinb Added INLINE_UNWIND to the
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// smart pointer declarations
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// 01-Mar-96 dlee converted to templates
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//
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//----------------------------------------------------------------------------
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#pragma once
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// util.cxx
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FILE * OpenFileFromPath( WCHAR const * wcsFile );
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enum
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{
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eDontCare = 0,
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eMostDetailed,
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eMostGeneric,
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eMostDetailedOleDBError,
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eMostGenericOleDBError,
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eMostDetailedCIError,
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eMostGenericCIError
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};
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SCODE GetOleDBErrorInfo(IUnknown *pErrSrc,
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REFIID riid,
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LCID lcid,
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unsigned eDesiredDetail,
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ERRORINFO *pErrorInfo,
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IErrorInfo **ppIErrorInfo);
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//+---------------------------------------------------------------------------
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//
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// Class: CSFile
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//
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// Purpose: Lightweight class to wrap a FILE * so the file will
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// always be closed, even if an exception is thrown.
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//
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// Notes: Operators -> and FILE * are overloaded so a CSFile may
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// be treated like a FILE * in the CRT functions.
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//
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// History: 17-May-94 t-jeffc Created.
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//
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//----------------------------------------------------------------------------
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class CSFile : INHERIT_UNWIND
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{
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INLINE_UNWIND( CSFile );
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public:
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CSFile( FILE * pfile )
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{
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_pfile = pfile;
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END_CONSTRUCTION( CSFile );
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}
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~CSFile()
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{
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if( _pfile != NULL )
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fclose( _pfile );
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}
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FILE * Acquire()
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{
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FILE * pfileTmp = _pfile;
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_pfile = 0;
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return pfileTmp;
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}
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FILE * operator->() { return( _pfile ); }
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operator FILE * () { return( _pfile ); }
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private:
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FILE * _pfile;
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};
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