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191 lines
5.0 KiB
191 lines
5.0 KiB
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1998-1999.
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//
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// File: signore.cxx
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//
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// Contents: CScopeIgnore methods
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//
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// Classes: CScopeIgnore
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//
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// History: 3-1-98 mohamedn 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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#include "cicat.hxx"
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//+-------------------------------------------------------------------------
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//
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// Member: CScopesIgnored::Enumerate(), public
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//
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// Synopsis: enumerates ignoredScopes table
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//
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// Arguments: [pwcRoot] -- contains table entries upon return
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// [cwc] -- buffer lenght of pwcRoot
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// [iBmk] -- enumeration index
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//
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// returns: TRUE if pwcRoot contains valid table entry. FALSE otherwise.
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//
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// History: 3-1-98 mohamedn created
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//
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//--------------------------------------------------------------------------
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BOOL CScopesIgnored::Enumerate(WCHAR * pwcRoot, unsigned cwc, unsigned & iBmk )
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{
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CReadAccess lock( _rwLock );
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while( iBmk < _aElems.Count() )
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{
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if ( cwc < ( wcslen( _aElems[iBmk]->Get() ) + 1 ) )
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THROW( CException(STATUS_INVALID_PARAMETER ) );
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wcscpy( pwcRoot, _aElems[iBmk]->Get() );
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iBmk++;
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return TRUE;
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}
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return FALSE;
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} //Enumerate
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//+-------------------------------------------------------------------------
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//
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// Member: CScopesIgnored::RemoveElement(), public
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//
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// Synopsis: removes an element from ignoredScopes table
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//
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// Arguments: [pwcScope] -- scope to remove.
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//
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// returns: none.
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//
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// History: 3-1-98 mohamedn created
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//
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//--------------------------------------------------------------------------
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void CScopesIgnored::RemoveElement(WCHAR const * pwcScope)
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{
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CLowcaseBuf lowcaseBuf(pwcScope);
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CWriteAccess lock( _rwLock );
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for ( unsigned i = 0; i < _aElems.Count(); i++ )
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{
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if ( lowcaseBuf.AreEqual(*_aElems[i]) )
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{
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delete _aElems.AcquireAndShrink(i);
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ConstructDFAObject();
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break;
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}
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}
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} //RemoveElement
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//+-------------------------------------------------------------------------
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//
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// Member: CScopesIgnored::RegExFind(), public
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//
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// Synopsis: finds a regular expression match for the passed in string.
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//
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// Arguments: [bufToFind] -- contains path to search for.
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//
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// returns: TRUE if path was found, FALSE otherwise.
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//
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// History: 3-1-98 mohamedn created
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//
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//--------------------------------------------------------------------------
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BOOL CScopesIgnored::RegExFind( CLowcaseBuf const & bufToFind )
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{
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//
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// The DFA may be NULL if we failed to create it while adding or
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// removing a scope.
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//
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// This logic is complicated by the fact that we can't promote from a
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// read lock to a write lock.
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//
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do
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{
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if ( _xDFA.IsNull() )
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{
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CWriteAccess lock( _rwLock );
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if ( _xDFA.IsNull() )
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ConstructDFAObject();
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}
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CReadAccess lock( _rwLock );
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if ( 0 == _aElems.Count() )
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return FALSE; // no excluded scopes to search
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if ( !_xDFA.IsNull() )
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{
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BOOL fFound = _xDFA->Recognize( bufToFind.Get() );
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ciDebugOut(( DEB_ITRACE, "%ws is %s Found\n", bufToFind.Get(),
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fFound ? "" : "not" ));
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return fFound;
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}
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} while ( TRUE );
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// Keep the compiler happy...
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return FALSE;
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} //RegExFind
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//+-------------------------------------------------------------------------
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//
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// Member: BOOL CScopesIgnored::ConstructDFAObject(), private
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//
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// Synopsis: Creates a new CDFA object
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//
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// History: 3-1-98 mohamedn created
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//
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//--------------------------------------------------------------------------
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void CScopesIgnored::ConstructDFAObject(void)
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{
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DWORD bufLen = 0;
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//
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// Generate a single buffer containing all excluded scopes.
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//
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for ( unsigned i = 0; i < _aElems.Count(); i++ )
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bufLen += _aElems[i]->Length() + 2; // to account for "|," reg-x chars.
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bufLen++; // null terminator.
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XGrowable<WCHAR> xExcludeString(4*80); // 4 lines by 80 wchars each.
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xExcludeString.SetSize(bufLen);
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for ( i = 0, xExcludeString[0] = L'\0' ; i < _aElems.Count(); i++ )
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{
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if ( i > 0 )
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wcscat( xExcludeString.Get(), L"|," ); // add a regX OR separator.
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wcscat( xExcludeString.Get(), _aElems[i]->Get() );
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}
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//
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// Create a new CDFA object, case insensitive with infinite timeout.
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//
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XPtr<CDFA> xDFA(new CDFA( xExcludeString.Get(), _tl, FALSE ) );
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_xDFA.Free();
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_xDFA.Set(xDFA.Acquire());
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ciDebugOut(( DEB_ITRACE, "New RegularExpression: %ws\n", xExcludeString.Get() ));
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} //ConstructDFAObject
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