114 lines
3.1 KiB
C++
114 lines
3.1 KiB
C++
#ifndef _HXX_FBSTR
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#define _HXX_FBSTR
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//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1993.
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//
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// File: fbstr.hxx
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//
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// Contents: Wrappers around BSTR api to account for wierdness with NULL
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//
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// Functions: STRVAL
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// ADsIsEmptyString
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// ADsAllocString
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// ADsAllocStringLen
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// ADsReAllocString
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// ADsReAllocStringLen
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// ADsFreeString
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// ADsStringLen
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// ADsStringByteLen
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// ADsAllocStringByteLen
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// ADsStringCmp
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// ADsStringNCmp
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// ADsStringICmp
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// ADsStringNICmp
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//
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// History: 25-Apr-94 adams Created
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// 02-Jun-94 doncl removed TCHAR usage
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// 7-20-94 adams Added ADsIsEmptyString
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// 1-3-95 krishnaG Forms* > ADs*
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//
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//----------------------------------------------------------------------------
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typedef const OLECHAR * CBSTR;
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const WCHAR EMPTYSTRING[] = L"";
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//+---------------------------------------------------------------------------
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//
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// Function: STRVAL
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//
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// Synopsis: Returns the string unless it is NULL, in which case the empty
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// string is returned.
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//
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// History: 06-May-94 adams Created
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// 02-Jun-94 doncl changed to STRVAL/LPCWSTR instead of
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// TSTRVAL/LPCTSTR
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//
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//----------------------------------------------------------------------------
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inline LPCWSTR
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STRVAL(LPCWSTR lpcwsz)
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{
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return lpcwsz ? lpcwsz : EMPTYSTRING;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: ADsIsEmptyString
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//
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// Synopsis: Returns TRUE if the string is empty, FALSE otherwise.
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//
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// History: 7-20-94 adams Created
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//
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//----------------------------------------------------------------------------
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inline BOOL
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ADsIsEmptyString(LPCWSTR lpcwsz)
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{
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return !(lpcwsz && lpcwsz[0]);
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}
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//+---------------------------------------------------------------------------
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//
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// Function: ADsFreeString
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//
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// Synopsis: Frees a BSTR.
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//
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// History: 5-06-94 adams Created
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//
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//----------------------------------------------------------------------------
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inline void
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ADsFreeString(BSTR bstr)
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{
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SysFreeString(bstr);
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}
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STDAPI ADsAllocString(const OLECHAR * pch, BSTR * pBSTR);
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STDAPI ADsAllocStringLen(const OLECHAR * pch, UINT uc, BSTR * pBSTR);
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STDAPI ADsReAllocString(BSTR * pBSTR, const OLECHAR * pch);
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STDAPI ADsReAllocStringLen(BSTR * pBSTR, const OLECHAR * pch, UINT uc);
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STDAPI_(UINT) ADsStringLen(BSTR bstr);
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#ifdef WIN32
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STDAPI_(unsigned int) ADsStringByteLen(BSTR bstr);
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STDAPI ADsAllocStringByteLen(const char * psz, unsigned int len, BSTR * pBSTR);
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#endif
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STDAPI_(int) ADsStringCmp(CBSTR bstr1, CBSTR bstr2);
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STDAPI_(int) ADsStringNCmp(CBSTR bstr1, CBSTR bstr2, size_t c);
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STDAPI_(int) ADsStringICmp(CBSTR bstr1, CBSTR bstr2);
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STDAPI_(int) ADsStringNICmp(CBSTR bstr1, CBSTR bstr2, size_t c);
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#endif // #ifndef _HXX_FBSTR
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