C++ Match函数代码示例

AST* ParseLoad(ParserState* parser) {
	Match(parser, TOKEN_LOAD);
	return CreateASTNode(SEM_LOAD, Match(parser, TOKEN_STRING));
}

void CBNET :: ProcessChatEvent( CIncomingChatEvent *chatEvent )
{
	CBNETProtocol :: IncomingChatEvent Event = chatEvent->GetChatEvent( );
	string User = chatEvent->GetUser( ), lowerUser = chatEvent->GetUser( ), Message = chatEvent->GetMessage( );
	transform( lowerUser.begin( ), lowerUser.end( ), lowerUser.begin( ), (int(*)(int))tolower );
	
	unsigned char Access = m_CCBot->m_DB->AccessCheck( m_Server, lowerUser );
	
	if( Access == 255 )
		Access = 0;
	
	bool Output = ( Event == CBNETProtocol :: CONSOLE_INPUT );			
	bool Whisper = ( Event == CBNETProtocol :: EID_WHISPER );
        bool ClanMember = IsClanMember( m_UserName );

	if( Event == CBNETProtocol :: EID_TALK )
			CONSOLE_Print( "[LOCAL: " + m_ServerAlias + ":" + m_CurrentChannel + "][" + User + "] " + Message );
	else if( Event == CBNETProtocol :: EID_WHISPER )
			CONSOLE_Print( "[WHISPER: " + m_ServerAlias + "][" + User + "] " + Message );
	else if( Event == CBNETProtocol :: EID_EMOTE )
			CONSOLE_Print( "[EMOTE: " + m_ServerAlias + ":" + m_CurrentChannel + "][" + User + "] " + Message );

	if( Event == CBNETProtocol :: EID_TALK || Event == CBNETProtocol :: EID_WHISPER  || Event == CBNETProtocol :: EID_EMOTE || Event == CBNETProtocol :: CONSOLE_INPUT )
	{
		// Anti-Spam
		// TODO: improve this to be more robust and efficient

		if( m_AntiSpam && !Message.empty( ) && Message[0] != m_CommandTrigger[0] && Access < 5 && IsInChannel( User ) && User != m_UserName )
		{
			string message = Message;
			transform( message.begin( ), message.end( ), message.begin( ), (int(*)(int))tolower );
			uint32_t SpamCacheSize = m_Channel.size( ) * 3;

			if( m_SpamCache.size( ) > SpamCacheSize )
				m_SpamCache.erase( m_SpamCache.begin( ) );

			m_SpamCache.insert( pair<string, string>( lowerUser, message ) );

			int mesgmatches = 0, nickmatches = 0;

			for( multimap<string, string> :: iterator i = m_SpamCache.begin( ); i != m_SpamCache.end( ); ++i )
			{
				if( (*i).first == lowerUser )
					++nickmatches;

				if( (*i).second.find( message ) )
					++mesgmatches;
			}

			if( mesgmatches > 2 || nickmatches > 3 )
				SendChatCommand( "/kick " + User + " Anti-Spam", Output );
		}

		// Swearing kick

		if ( m_SwearingKick && !Message.empty( ) && !Match( User, m_HostbotName ) && !m_CCBot->m_DB->SafelistCheck( m_Server, User ) && IsInChannel( User ) && Access < 5 ) 
		{
			string message = Message;
			transform( message.begin( ), message.end( ), message.begin( ), (int(*)(int))tolower );

			for( uint32_t i = 0; i < m_CCBot->m_SwearList.size( ); ++i )
			{
				if( message.find( m_CCBot->m_SwearList[i] ) != string :: npos )
					QueueChatCommand( m_CCBot->m_Language->SwearKick( User, m_CCBot->m_SwearList[i] ), Output );
			}
		}
		
		// ?TRIGGER
		
		if( Match( Message, "?trigger" ) )
		{
			QueueChatCommand( m_CCBot->m_Language->CommandTrigger( m_CommandTrigger ), User, Whisper, Output );	
		}		
		else if( !Message.empty( ) && Message[0] == m_CommandTrigger[0] && Event != CBNETProtocol :: EID_EMOTE )
		{
			// extract the command trigger, the command, and the payload
			// e.g. "!say hello world" -> command: "say", payload: "hello world"

			string Command, Payload;
			string :: size_type PayloadStart = Message.find( " " );

			if( PayloadStart != string :: npos )
			{
				Command = Message.substr( 1, PayloadStart - 1 );
				Payload = Message.substr( PayloadStart + 1 );
			}
			else
				Command = Message.substr( 1 );

			transform( Command.begin( ), Command.end( ), Command.begin( ), (int(*)(int))tolower );
			

			/********************************
			************ COMMANDS ***********
			********************************/

			//
			// !ACCEPT
			//

//.........这里部分代码省略.........

/**

  Set the boot order based on configuration retrieved from QEMU.

  Attempt to retrieve the "bootorder" fw_cfg file from QEMU. Translate the
  OpenFirmware device paths therein to UEFI device path fragments. Match the
  translated fragments against BootOptionList, and rewrite the BootOrder NvVar
  so that it corresponds to the order described in fw_cfg.

  @param[in] BootOptionList  A boot option list, created with
                             BdsLibEnumerateAllBootOption ().


  @retval RETURN_SUCCESS            BootOrder NvVar rewritten.

  @retval RETURN_UNSUPPORTED        QEMU's fw_cfg is not supported.

  @retval RETURN_NOT_FOUND          Empty or nonexistent "bootorder" fw_cfg
                                    file, or no match found between the
                                    "bootorder" fw_cfg file and BootOptionList.

  @retval RETURN_INVALID_PARAMETER  Parse error in the "bootorder" fw_cfg file.

  @retval RETURN_OUT_OF_RESOURCES   Memory allocation failed.

  @return                           Values returned by gBS->LocateProtocol ()
                                    or gRT->SetVariable ().

**/
RETURN_STATUS
SetBootOrderFromQemu (
  IN  CONST LIST_ENTRY *BootOptionList
  )
{
  RETURN_STATUS                    Status;
  FIRMWARE_CONFIG_ITEM             FwCfgItem;
  UINTN                            FwCfgSize;
  CHAR8                            *FwCfg;
  CONST CHAR8                      *FwCfgPtr;

  BOOT_ORDER                       BootOrder;
  ACTIVE_OPTION                    *ActiveOption;
  UINTN                            ActiveCount;

  UINTN                            TranslatedSize;
  CHAR16                           Translated[TRANSLATION_OUTPUT_SIZE];

  Status = QemuFwCfgFindFile ("bootorder", &FwCfgItem, &FwCfgSize);
  if (Status != RETURN_SUCCESS) {
    return Status;
  }

  if (FwCfgSize == 0) {
    return RETURN_NOT_FOUND;
  }

  FwCfg = AllocatePool (FwCfgSize);
  if (FwCfg == NULL) {
    return RETURN_OUT_OF_RESOURCES;
  }

  QemuFwCfgSelectItem (FwCfgItem);
  QemuFwCfgReadBytes (FwCfgSize, FwCfg);
  if (FwCfg[FwCfgSize - 1] != '\0') {
    Status = RETURN_INVALID_PARAMETER;
    goto ErrorFreeFwCfg;
  }

  DEBUG ((DEBUG_VERBOSE, "%a: FwCfg:\n", __FUNCTION__));
  DEBUG ((DEBUG_VERBOSE, "%a\n", FwCfg));
  DEBUG ((DEBUG_VERBOSE, "%a: FwCfg: <end>\n", __FUNCTION__));
  FwCfgPtr = FwCfg;

  BootOrder.Produced  = 0;
  BootOrder.Allocated = 1;
  BootOrder.Data = AllocatePool (
                     BootOrder.Allocated * sizeof (*BootOrder.Data)
                     );
  if (BootOrder.Data == NULL) {
    Status = RETURN_OUT_OF_RESOURCES;
    goto ErrorFreeFwCfg;
  }

  Status = CollectActiveOptions (BootOptionList, &ActiveOption, &ActiveCount);
  if (RETURN_ERROR (Status)) {
    goto ErrorFreeBootOrder;
  }

  //
  // translate each OpenFirmware path
  //
  TranslatedSize = sizeof (Translated) / sizeof (Translated[0]);
  Status = TranslateOfwPath (&FwCfgPtr, Translated, &TranslatedSize);
  while (Status == RETURN_SUCCESS ||
         Status == RETURN_UNSUPPORTED ||
         Status == RETURN_BUFFER_TOO_SMALL) {
    if (Status == RETURN_SUCCESS) {
      UINTN Idx;

      //
//.........这里部分代码省略.........

 bool Match(const std::string& s, match_flag_type flags = match_default) { return Match(s.c_str(), flags); }

/*
*   Search Text or Binary Data for Pattern matches
*/ 
int
acsmSearch (ACSM_STRUCT * acsm, unsigned char *Tx, int n,
#ifdef DETECTION_OPTION_TREE
            int (*Match)(void * id, void *tree, int index, void *data),
#else
            int (*Match) (void *  id, int index, void *data),
#endif
            void *data, int* current_state ) 
{

    unsigned char Tc[64*1024];
    int state = 0;
    ACSM_PATTERN * mlist;
    unsigned char *Tend;
    ACSM_STATETABLE * StateTable = acsm->acsmStateTable;
    int nfound = 0;
    unsigned char *T;
    int index;
    /* Case conversion */ 
    ConvertCaseEx (Tc, Tx, n);
    T = Tc;
    Tend = T + n;

    if ( !current_state )
    {
        return 0;
    }

    state = *current_state;

    for (; T < Tend; T++)
    {
        state = StateTable[state].NextState[*T];

        if( StateTable[state].MatchList != NULL )
        {
#ifdef DETECTION_OPTION_TREE
            mlist = StateTable[state].MatchList;
            index = T - mlist->n + 1 - Tc;
            nfound++;
            if (Match (mlist->id, mlist->rule_option_tree, index, data) > 0)
            {
                *current_state = state;
                return nfound;
            }
#else
            for( mlist=StateTable[state].MatchList; mlist!=NULL;
                 mlist=mlist->next )
            {
                index = T - mlist->n + 1 - Tc;
                if( mlist->nocase )
                {
                    nfound++;
                    if (Match (mlist->id, index, data) > 0)
                    {
                        *current_state = state;
                        return nfound;
                    }
                }
                else
                {
                    if( memcmp (mlist->casepatrn, Tx + index, mlist->n) == 0 )
                    {
                        nfound++;
                        if (Match (mlist->id, index, data) > 0)
                        {
                            *current_state = state;
                            return nfound;
                        }
                    }
                }
            }
#endif
        }
    }
    *current_state = state;
    return nfound;
}

// static
bool Cddb::Query(Matches& res, const Toc& toc)
{
    if (toc.size() < 2)
        return false;
    const unsigned totalTracks = toc.size() - 1;

    unsigned secs = 0;
    const discid_t discID = Discid(secs, toc.data(), totalTracks);

    // Is it cached?
    if (Dbase::Search(res, discID))
        return res.matches.size() > 0;

    // Construct query
    // cddb query discid ntrks off1 off2 ... nsecs
    QString URL2 = URL + QString("cddb+query+%1+%2+").arg(discID,0,16).arg(totalTracks);

    for (unsigned t = 0; t < totalTracks; ++t)
        URL2 += QString("%1+").arg(msf2lsn(toc[t]));

    URL2 += QString::number(secs);

    // Send the request
    URL2 += "&hello=" + helloID() + "&proto=5";
    LOG(VB_MEDIA, LOG_INFO, "CDDB lookup: " + URL2);

    QString cddb;
    QByteArray data;
    if (!GetMythDownloadManager()->download(URL2, &data))
        return false;
    cddb = data;

    // Check returned status
    const uint stat = cddb.left(3).toUInt(); // Extract 3 digit status:
    cddb = cddb.mid(4);
    switch (stat)
    {
    case 200: // Unique match
        LOG(VB_MEDIA, LOG_INFO, "CDDB match: " + cddb.trimmed());
        // e.g. "200 rock 960b5e0c Nichole Nordeman / Woven & Spun"
        res.discID = discID;
        res.isExact = true;
        res.matches.push_back(Match(
            cddb.section(' ', 0, 0), // genre
            cddb.section(' ', 1, 1).toUInt(nullptr,16), // discID
            cddb.section(' ', 2).section(" / ", 0, 0), // artist
            cddb.section(' ', 2).section(" / ", 1) // title
        ));
        break;

    case 202: // No match for disc ID...
        LOG(VB_MEDIA, LOG_INFO, "CDDB no match");
        Dbase::New(discID, toc); // Stop future lookups
        return false;

    case 210:  // Multiple exact matches
    case 211:  // Multiple inexact matches
        // 210 Found exact matches, list follows (until terminating `.')
        // 211 Found inexact matches, list follows (until terminating `.')
        res.discID = discID;
        res.isExact = 210 == stat;

        // Remove status line
        cddb = cddb.section('\n', 1);

        // Append all matches
        while (!cddb.isEmpty() && !cddb.startsWith("."))
        {
            LOG(VB_MEDIA, LOG_INFO, QString("CDDB %1 match: %2").
                arg(210 == stat ? "exact" : "inexact").
                arg(cddb.section('\n',0,0)));
            res.matches.push_back(Match(
                cddb.section(' ', 0, 0), // genre
                cddb.section(' ', 1, 1).toUInt(nullptr,16), // discID
                cddb.section(' ', 2).section(" / ", 0, 0), // artist
                cddb.section(' ', 2).section(" / ", 1) // title
            ));
            cddb = cddb.section('\n', 1);
        }
        if (res.matches.size() <= 0)
            Dbase::New(discID, toc); // Stop future lookups
        break;

    default:
        // TODO try a (telnet 8880) CDDB lookup
        LOG(VB_GENERAL, LOG_INFO, QString("CDDB query error: %1").arg(stat) +
            cddb.trimmed());
        return false;
    }
    return true;
}

void MatchEditor::Init () {
    SetClassName("MatchEditor");
    Match("%[]", true);
}

 // Use Traverse, not Visit, to check that data recursion optimization isn't
 // bypassing the call of this function.
 bool TraverseCXXOperatorCallExpr(CXXOperatorCallExpr *CE) {
   Match(getOperatorSpelling(CE->getOperator()), CE->getExprLoc());
   return ExpectedLocationVisitor<CXXOperatorCallExprTraverser>::
       TraverseCXXOperatorCallExpr(CE);
 }

 bool VisitParenExpr(ParenExpr *Parens) {
   Match("", Parens->getExprLoc());
   return true;
 }

 bool VisitVarDecl(VarDecl *Variable) {
   Match(Variable->getNameAsString(), Variable->getLocStart());
   return true;
 }

 bool VisitCXXMemberCallExpr(CXXMemberCallExpr *Call) {
   Match(Call->getMethodDecl()->getQualifiedNameAsString(),
         Call->getLocStart());
   return true;
 }

 bool VisitDeclRefExpr(DeclRefExpr *Reference) {
   Match(Reference->getNameInfo().getAsString(), Reference->getLocation());
   return true;
 }

 bool VisitTypeLoc(TypeLoc TypeLocation) {
   Match(TypeLocation.getType().getAsString(), TypeLocation.getBeginLoc());
   return true;
 }

Match Match::flip() const {
  return Match(second, first);
}

void Constants(){
    Match('c');
}