563 lines
14 KiB
C++
563 lines
14 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: tokstr.cxx
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//
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// Contents: Used to break down a string into its tokens
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//
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// History: 96/Feb/13 DwightKr Created
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//
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//----------------------------------------------------------------------------
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#include <pch.cxx>
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#pragma hdrstop
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//+---------------------------------------------------------------------------
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//
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// Method: CTokenizeString::CTokenizeString - public constructor
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//
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// History: 96/Jan/23 DwightKr Created
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//
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//----------------------------------------------------------------------------
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CTokenizeString::CTokenizeString( WCHAR const * wcsString ) :
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_wcsString(wcsString),
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_wcsCurrentToken(wcsString),
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_wcsNextToken(wcsString)
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{
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Accept();
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}
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//+---------------------------------------------------------------------------
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//
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// Method: CTokenizeString::Accept - public
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//
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// History: 96/Jan/23 DwightKr Created
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//
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//----------------------------------------------------------------------------
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void CTokenizeString::Accept()
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{
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EatWhiteSpace();
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_wcsCurrentToken = _wcsNextToken;
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switch ( *_wcsCurrentToken )
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{
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case L'"':
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_wcsNextToken++;
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_token = QUOTES_TOKEN;
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break;
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case L'{':
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_wcsNextToken++;
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_token = C_OPEN_TOKEN;
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break;
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case L'}':
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_wcsNextToken++;
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_token = C_CLOSE_TOKEN;
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break;
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case L',':
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_wcsNextToken++;
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_token = COMMA_TOKEN;
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break;
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case 0:
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_token = EOS_TOKEN;
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break;
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default:
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_wcsNextToken = _wcsCurrentToken + wcscspn( _wcsCurrentToken, WORD_STR );
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_token = TEXT_TOKEN;
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break;
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}
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CTokenizeString:AcqWord, public
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//
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// Synopsis: Copies the word that _wcsCurrentToken is pointing to and
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// returns the new string. Positions _wcsCurrentToken after
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// the word and whitespace. Returns 0 if at the end of a
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// TEXT_TOKEN.
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//
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// History: 96-Feb-13 DwightKr Created.
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//
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//----------------------------------------------------------------------------
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WCHAR * CTokenizeString::AcqWord()
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{
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if ( IsEndOfTextToken() )
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return 0;
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WCHAR const * pEnd = _wcsNextToken;
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int cwcToken = (int)(pEnd - _wcsCurrentToken + 1);
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WCHAR * newBuf = new WCHAR [ cwcToken ];
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RtlCopyMemory( newBuf, _wcsCurrentToken, cwcToken * sizeof(WCHAR));
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newBuf[cwcToken-1] = 0;
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_wcsCurrentToken = pEnd;
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while ( iswspace(*_wcsCurrentToken) )
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_wcsCurrentToken++;
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return newBuf;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CTokenizeString::GetNumber, public
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//
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// Synopsis: If _text is at the end of the TEXT_TOKEN, returns FALSE.
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// If not, puts the unsigned _int64 from the scanner into number
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// and returns TRUE.
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//
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// Arguments: [number] -- the unsigned _int64 which will be changed and
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// passed back out as the ULONG from the scanner.
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//
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// Notes: May be called several times in a loop before Accept() is
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// called.
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//
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// History: 96-Feb-13 AmyA Created
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//
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//----------------------------------------------------------------------------
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BOOL CTokenizeString::GetNumber( unsigned _int64 & number )
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{
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ULONG base = 10;
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WCHAR const * wcsCurrentToken = _wcsCurrentToken;
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if ( IsEndOfTextToken() ||
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!iswdigit(*_wcsCurrentToken) ||
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(*_wcsCurrentToken == L'-') )
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{
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return FALSE;
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}
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if ( _wcsCurrentToken[0] == L'0' &&
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(_wcsCurrentToken[1] == L'x' || _wcsCurrentToken[1] == L'X'))
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{
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_wcsCurrentToken += 2;
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base = 16;
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}
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number = _wcstoui64( _wcsCurrentToken, (WCHAR **)(&_wcsCurrentToken), base );
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//
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// looks like a real number?
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//
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if ( ( wcsCurrentToken == _wcsCurrentToken ) ||
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( L'.' == *_wcsCurrentToken ) )
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{
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_wcsCurrentToken = wcsCurrentToken;
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return FALSE;
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}
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while ( iswspace(*_wcsCurrentToken) )
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_wcsCurrentToken++;
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return TRUE;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CTokenizeString::GetNumber, public
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//
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// Synopsis: If _wcsCurrentToken is at the end of the TEXT_TOKEN, returns FALSE.
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// If not, puts the _int64 from the scanner into number and
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// returns TRUE.
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//
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// Arguments: [number] -- the _int64 which will be changed and passed back
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// out as the _int64 from the scanner.
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//
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// Notes: May be called several times in a loop before Accept() is
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// called.
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//
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// History: 96-Feb-13 DwightKr Created
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//
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//----------------------------------------------------------------------------
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BOOL CTokenizeString::GetNumber( _int64 & number )
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{
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WCHAR *text = (WCHAR *) _wcsCurrentToken;
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BOOL IsNegative = FALSE;
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if ( L'-' == _wcsCurrentToken[0] )
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{
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IsNegative = TRUE;
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_wcsCurrentToken++;
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}
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unsigned _int64 ui64Number;
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if ( !GetNumber( ui64Number ) )
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{
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_wcsCurrentToken = text;
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return FALSE;
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}
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if ( IsNegative )
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{
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if ( ui64Number > 0x8000000000000000L )
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{
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_wcsCurrentToken = text;
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return FALSE;
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}
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number = -((_int64) ui64Number);
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}
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else
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{
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number = (_int64) ui64Number;
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}
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return TRUE;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CTokenizeString::GetNumber, public
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//
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// Synopsis: If _wcsCurrentToken is at the end of the TEXT_TOKEN, returns FALSE.
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// If not, puts the LONG from the scanner into number and
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// returns TRUE.
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//
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// Arguments: [number] -- the double which will be changed and passed back
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// out as the double from the scanner.
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//
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// Notes: May be called several times in a loop before Accept() is
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// called.
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//
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// History: 96-Feb-13 DwightKr Created
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//
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//----------------------------------------------------------------------------
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BOOL CTokenizeString::GetNumber( double & number )
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{
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if ( IsEndOfTextToken() ||
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((L'-' != *_wcsCurrentToken) &&
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(iswdigit(*_wcsCurrentToken) == 0) )
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)
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{
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return FALSE;
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}
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if ( swscanf( _wcsCurrentToken, L"%lf", &number ) != 1 )
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{
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return FALSE;
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}
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while ( iswspace(*_wcsCurrentToken) != 0 )
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_wcsCurrentToken++;
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return TRUE;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CTokenizeString::GetGUID, public
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//
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// Synopsis: If _wcsCurrentToken is at the end of the TEXT_TOKEN, returns FALSE.
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// If not, puts the guid into guid & returns TRUE;
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//
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// Arguments: [guid] -- the guid which will be changed and passed back
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// out as the output from the scanner.
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//
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// Notes: May be called several times in a loop before Accept() is
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// called.
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//
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// History: 96-Feb-13 DwightKr Created
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//
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//----------------------------------------------------------------------------
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BOOL CTokenizeString::GetGUID( GUID & guid )
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{
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if ( IsEndOfTextToken() || !iswdigit(*_wcsCurrentToken) )
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return FALSE;
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// 0123456789 123456789 123456789 123456
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// A guid MUST have the syntax XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
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//
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//
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// Don't use wsscanf. We're scanning into *bytes*, but wsscanf assumes
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// result locations are *dwords*. Thus a write to the last few bytes of
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// the guid writes over other memory!
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//
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WCHAR wcsGuid[37];
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RtlZeroMemory( wcsGuid, sizeof(wcsGuid) );
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wcsncpy( wcsGuid, _wcsCurrentToken, 36 );
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if ( wcsGuid[8] != L'-' )
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return FALSE;
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wcsGuid[8] = 0;
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WCHAR * pwcStart = &wcsGuid[0];
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WCHAR * pwcEnd;
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guid.Data1 = wcstoul( pwcStart, &pwcEnd, 16 );
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if ( pwcEnd < &wcsGuid[8] ) // Non-digit found before wcsGuid[8]
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return FALSE;
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if ( wcsGuid[13] != L'-' )
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return FALSE;
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wcsGuid[13] = 0;
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pwcStart = &wcsGuid[9];
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guid.Data2 = (USHORT)wcstoul( pwcStart, &pwcEnd, 16 );
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if ( pwcEnd < &wcsGuid[13] )
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return FALSE;
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if ( wcsGuid[18] != L'-' )
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return FALSE;
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wcsGuid[18] = 0;
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pwcStart = &wcsGuid[14];
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guid.Data3 = (USHORT)wcstoul( pwcStart, &pwcEnd, 16 );
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if ( pwcEnd < &wcsGuid[18] )
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return FALSE;
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WCHAR wc = wcsGuid[21];
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wcsGuid[21] = 0;
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pwcStart = &wcsGuid[19];
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guid.Data4[0] = (unsigned char)wcstoul( pwcStart, &pwcEnd, 16 );
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if ( pwcEnd < &wcsGuid[21] )
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return FALSE;
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wcsGuid[21] = wc;
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if ( wcsGuid[23] != L'-' )
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return FALSE;
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wcsGuid[23] = 0;
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pwcStart = &wcsGuid[21];
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guid.Data4[1] = (unsigned char)wcstoul( pwcStart, &pwcEnd, 16 );
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if ( pwcEnd < &wcsGuid[23] )
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return FALSE;
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for ( unsigned i = 0; i < 6; i++ )
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{
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wc = wcsGuid[26+i*2];
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wcsGuid[26+i*2] = 0;
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pwcStart = &wcsGuid[24+i*2];
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guid.Data4[2+i] = (unsigned char)wcstoul( pwcStart, &pwcEnd, 16 );
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if ( pwcEnd < &wcsGuid[26+i*2] )
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return FALSE;
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wcsGuid[26+i*2] = wc;
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}
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_wcsCurrentToken += 36;
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_wcsNextToken = _wcsCurrentToken;
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EatWhiteSpace();
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return TRUE;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CTokenizeString::AcqPhrase, public
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//
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// Synopsis: gets all characters up to end-of-line or next quote
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//
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// History: 96-Feb-13 DwightKr Created
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//
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//----------------------------------------------------------------------------
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WCHAR * CTokenizeString::AcqPhrase()
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{
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//
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// Find the closing "
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//
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WCHAR const * wcsClosingQuote = _wcsCurrentToken;
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do
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{
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if ( 0 == *wcsClosingQuote )
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break;
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if ( L'"' == *wcsClosingQuote )
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{
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if ( L'"' == *(wcsClosingQuote+1) )
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wcsClosingQuote++;
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else
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break;
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}
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wcsClosingQuote++;
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} while ( TRUE );
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//
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// We've found the closing quote. Build a buffer big enough to
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// contain the string.
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//
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ULONG cwcToken = (ULONG)(wcsClosingQuote - _wcsCurrentToken + 1);
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XArray<WCHAR> wcsToken( cwcToken );
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//
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// copy the string, but remove the extra quote characters
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//
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WCHAR * pwcNewBuf = wcsToken.GetPointer();
|
||
|
|
WCHAR const * pStart = _wcsCurrentToken;
|
||
|
|
|
||
|
|
while ( pStart < wcsClosingQuote )
|
||
|
|
{
|
||
|
|
*pwcNewBuf++ = *pStart++;
|
||
|
|
if ( L'"' == *pStart )
|
||
|
|
pStart++;
|
||
|
|
}
|
||
|
|
|
||
|
|
*pwcNewBuf = 0;
|
||
|
|
|
||
|
|
_wcsCurrentToken += cwcToken - 1;
|
||
|
|
_wcsNextToken = _wcsCurrentToken;
|
||
|
|
|
||
|
|
EatWhiteSpace();
|
||
|
|
|
||
|
|
return wcsToken.Acquire();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//+---------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Member: CTokenizeString::AcqVector, public
|
||
|
|
//
|
||
|
|
// Synopsis: Gets each of the vector elements upto the next }
|
||
|
|
//
|
||
|
|
// History: 96-Feb-13 DwightKr Created
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
void CTokenizeString::AcqVector( PROPVARIANT & propVariant )
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Determine the VT type of this vector.
|
||
|
|
//
|
||
|
|
|
||
|
|
GUID guid;
|
||
|
|
_int64 i64Value;
|
||
|
|
double dblValue;
|
||
|
|
|
||
|
|
if ( GetGUID( guid ) )
|
||
|
|
{
|
||
|
|
propVariant.vt = VT_CLSID | VT_VECTOR;
|
||
|
|
propVariant.cauuid.cElems = 0;
|
||
|
|
|
||
|
|
CDynArrayInPlace<GUID> pElems;
|
||
|
|
|
||
|
|
do
|
||
|
|
{
|
||
|
|
Accept();
|
||
|
|
|
||
|
|
pElems.Add( guid, propVariant.cauuid.cElems );
|
||
|
|
propVariant.cauuid.cElems++;
|
||
|
|
|
||
|
|
if ( LookAhead() == COMMA_TOKEN )
|
||
|
|
{
|
||
|
|
Accept();
|
||
|
|
}
|
||
|
|
|
||
|
|
} while ( GetGUID( guid ) );
|
||
|
|
|
||
|
|
propVariant.cauuid.pElems = pElems.Acquire();
|
||
|
|
}
|
||
|
|
else if ( GetNumber( i64Value ) )
|
||
|
|
{
|
||
|
|
propVariant.vt = VT_I8 | VT_VECTOR;
|
||
|
|
propVariant.cah.cElems = 0;
|
||
|
|
|
||
|
|
CDynArrayInPlace<_int64> pElems;
|
||
|
|
|
||
|
|
do
|
||
|
|
{
|
||
|
|
Accept();
|
||
|
|
|
||
|
|
pElems.Add( i64Value, propVariant.cah.cElems );
|
||
|
|
propVariant.cah.cElems++;
|
||
|
|
|
||
|
|
if ( LookAhead() == COMMA_TOKEN )
|
||
|
|
{
|
||
|
|
Accept();
|
||
|
|
}
|
||
|
|
|
||
|
|
} while ( GetNumber( i64Value ) );
|
||
|
|
|
||
|
|
propVariant.cah.pElems = (LARGE_INTEGER *) pElems.Acquire();
|
||
|
|
}
|
||
|
|
else if ( GetNumber( dblValue ) )
|
||
|
|
{
|
||
|
|
propVariant.vt = VT_R8 | VT_VECTOR;
|
||
|
|
propVariant.cadbl.cElems = 0;
|
||
|
|
|
||
|
|
CDynArrayInPlace<double> pElems;
|
||
|
|
do
|
||
|
|
{ Accept();
|
||
|
|
|
||
|
|
pElems.Add( dblValue, propVariant.cadbl.cElems );
|
||
|
|
propVariant.cadbl.cElems++;
|
||
|
|
|
||
|
|
if ( LookAhead() == COMMA_TOKEN )
|
||
|
|
{
|
||
|
|
Accept();
|
||
|
|
}
|
||
|
|
|
||
|
|
} while ( GetNumber( dblValue ) );
|
||
|
|
|
||
|
|
propVariant.cadbl.pElems = pElems.Acquire();
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
propVariant.vt = VT_LPWSTR | VT_VECTOR;
|
||
|
|
CDynArrayInPlace<WCHAR *> pElems;
|
||
|
|
propVariant.calpwstr.cElems = 0;
|
||
|
|
|
||
|
|
while ( (LookAhead() != C_CLOSE_TOKEN) &&
|
||
|
|
(LookAhead() != EOS_TOKEN)
|
||
|
|
)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// If its a quoted string, get everything between the quotes.
|
||
|
|
//
|
||
|
|
if ( LookAhead() == QUOTES_TOKEN )
|
||
|
|
{
|
||
|
|
Accept(); // Skip over the quote
|
||
|
|
pElems.Add(AcqPhrase(), propVariant.calpwstr.cElems );
|
||
|
|
Accept(); // Skip over the string
|
||
|
|
|
||
|
|
if ( LookAhead() != QUOTES_TOKEN )
|
||
|
|
{
|
||
|
|
THROW( CHTXException(MSG_CI_HTX_MISSING_QUOTE, 0, 0) );
|
||
|
|
}
|
||
|
|
Accept(); // Skip over the quote
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Get the next word
|
||
|
|
//
|
||
|
|
|
||
|
|
pElems.Add( AcqWord(), propVariant.calpwstr.cElems );
|
||
|
|
Accept(); // Skip over the string
|
||
|
|
}
|
||
|
|
|
||
|
|
propVariant.calpwstr.cElems++;
|
||
|
|
if ( LookAhead() == COMMA_TOKEN )
|
||
|
|
{
|
||
|
|
Accept();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
propVariant.calpwstr.pElems = pElems.Acquire();
|
||
|
|
}
|
||
|
|
}
|