C++ ListElement::next方法代码示例

//
// Managing list elements
//
ListElement *ListElement::last()
{
	for (ListElement *p = this; ; p = p->next())
		if (p->next() == NULL)
			return p;
	// not reached
}

void List::clear()
{
   ListElement *elem = m_head;
   if( m_deletor != 0 )
   {
      while( elem != 0 )
      {
         ListElement *toBeDeleted = elem;
         elem = elem->next();
         m_deletor( (void *) toBeDeleted->data() );
         memFree( toBeDeleted );
      }
   }
   else {
      while( elem != 0 )
      {
         ListElement *toBeDeleted = elem;
         elem = elem->next();
         memFree( toBeDeleted );
      }
   }

   m_head = m_tail = 0;
   m_size = 0;
}

void AppFalcon::applyConstants ( Compiler &compiler )
{
   ListElement *dliter = m_options.defines.begin();
   while ( dliter != 0 )
   {
      String &directive = * ( ( String * ) dliter->data() );
      // find "="
      uint32 pos = directive.find ( "=" );
      if ( pos == String::npos )
      {
         throw String( "constant not in <directive>=<value> syntax: \"" + directive + "\"" );
      }

      //split the directive
      String dirname ( directive, 0, pos );
      String dirvalue ( directive, pos + 1 );
      dirname.trim();
      dirvalue.trim();

      // is the value a number?
      int64 number;
      if ( dirvalue.parseInt ( number ) )
         compiler.addIntConstant( dirname, number );
      else {
         compiler.addStringConstant( dirname, dirvalue );
      }

      dliter = dliter->next();
   }
}

void AppFalcon::applyDirectives ( Compiler &compiler )
{
   ListElement *dliter = m_options.directives.begin();
   while ( dliter != 0 )
   {
      String &directive = * ( ( String * ) dliter->data() );
      // find "="
      uint32 pos = directive.find ( "=" );
      if ( pos == String::npos )
      {
         throw String( "directive not in <directive>=<value> syntax: \"" + directive + "\"" );
      }

      //split the directive
      String dirname ( directive, 0, pos );
      String dirvalue ( directive, pos + 1 );
      dirname.trim();
      dirvalue.trim();

      // is the value a number?
      int64 number;
      bool result;
      if ( dirvalue.parseInt ( number ) )
         result = compiler.setDirective ( dirname, number );
      else
         result = compiler.setDirective ( dirname, dirvalue );

      if ( ! result )
      {
         throw String( "invalid directive or value: \"" + directive + "\"" );
      }

      dliter = dliter->next();
   }
}

unsigned int CssmList::length() const
{
	unsigned int len = 0;
	for (ListElement *elem = first(); elem; elem = elem->next())
		len++;
	return len;
}

void CssmList::clear(Allocator &alloc)
{
	ListElement *elem = first();
	while (elem) {
		ListElement *next = elem->next();
		destroy(elem, alloc);
		elem = next;
	}
}

void List::pushFront( uint32 data )
{
   ListElement *element = (ListElement *) memAlloc( sizeof( ListElement ) );
   element->iData( data );

   if ( m_head == 0 )
   {
      m_head = m_tail = element;
      element->next(0);
   }
   else {
      element->next( m_head );
      m_head->prev( element );
      m_head = element;
   }

   m_size++;
   element->prev( 0 );
}

void GenTree::gen_array( const ArrayDecl *ad )
{
   ListElement *iter = ad->begin();
   while( iter != 0 )
   {
      const Value *val = (const Value *) iter->data();
      gen_value( val );
      iter = iter->next();
      if( iter != 0 )
         m_out->writeString( ", " );
   }
}

void VMSemaphore::unsubscribe( VMContext *ctx )
{
   ListElement *elem = m_waiting.begin();
   while( elem != 0 )
   {
      VMContext *cty = (VMContext *) elem->data();
      if ( ctx == cty )
      {
         m_waiting.erase( elem );
         return;
      }
      elem = elem->next();
   }
}

//
// Parsing helper for subject makers.
// Note that count/array exclude the first element of list, which is the subject type wordid.
//
void AclSubject::Maker::crack(const CssmList &list, uint32 count, ListElement **array, ...)
{
    if (count != list.length() - 1)
        CssmError::throwMe(CSSM_ERRCODE_INVALID_ACL_SUBJECT_VALUE);
    if (count > 0) {
        va_list args;
        va_start(args, array);
        ListElement *elem = list.first()->next();
        for (uint32 n = 0; n < count; n++, elem = elem->next()) {
            CSSM_LIST_ELEMENT_TYPE expectedType = va_arg(args, CSSM_LIST_ELEMENT_TYPE);
            if (elem->type() != expectedType)
                CssmError::throwMe(CSSM_ERRCODE_INVALID_ACL_SUBJECT_VALUE);
            array[n] = elem;
        }
        va_end(args);
    }
}

void List::insertBefore( ListElement *position, const void *data )
{
   ListElement *element = (ListElement *) memAlloc( sizeof( ListElement ) );
   element->data( data );

   element->next( position );
   element->prev( position->prev() );
   if( position->prev() != 0 )
   {
      position->prev()->next( element );
   }

   position->prev( element );

   m_size++;
   if ( position == m_head )
      m_head = element;
}

void List::pushBack( const void *data )
{
   ListElement *element = (ListElement *) memAlloc( sizeof( ListElement ) );
   element->data( data );

   if ( m_head == 0 )
   {
      m_head = m_tail = element;
      element->prev(0);
   }
   else {
      element->prev( m_tail );
      m_tail->next( element );
      m_tail = element;
   }

   m_size++;
   element->next( 0 );
}

void GenTree::gen_dict( const DictDecl *ad )
{
   if( ad->empty() ) {
      m_out->writeString( " =>" );
      return;
   }

   ListElement *iter = ad->begin();
   while( iter != 0 )
   {
      DictDecl::pair *pair = (DictDecl::pair *) iter->data();
      const Value *key = pair->first;
      const Value *value = pair->second;

      gen_value( key );
      m_out->writeString( "=>" );
      gen_value( value );
      iter = iter->next();
      if( iter != 0 )
         m_out->writeString( ", " );
   }
}

void GenTree::generate( const Statement *cmp, const char *specifier, bool sameline, int depth )
{

   if ( ! sameline ) {
      String line;
      line.writeNumber( (int64) cmp->line() );
      int pos = 0;
      while (pos + line.length() < 5 ) {
         pos ++;
         m_out->writeString( " " );
      }

      m_out->writeString( line + " : " );

      for (int i = 0; i < depth; i++ )
         m_out->writeString( " " );
   }

   if ( specifier != 0 ) {
      m_out->writeString( specifier );
      m_out->writeString( " " );
   }

   switch( cmp->type() )
   {
      case Statement::t_none: m_out->writeString( "(placeholder none statement)\n" ); break;
      case Statement::t_break: m_out->writeString( "BREAK\n" ); break;
      case Statement::t_continue:
         m_out->writeString( "CONTINUE" );
         if( static_cast< const StmtContinue *>( cmp )->dropping() )
            m_out->writeString( " DROPPING" );
         m_out->writeString( "\n" );
         break;

      case Statement::t_launch:
         m_out->writeString( "LAUNCH " );
         gen_value( static_cast< const StmtExpression *>( cmp )->value() );
         m_out->writeString( "\n" );
      break;

      case Statement::t_autoexp:
         m_out->writeString( "AUTOEXPR " );
         gen_value( static_cast< const StmtExpression *>( cmp )->value() );
         m_out->writeString( "\n" );
      break;

      case Statement::t_return:
         m_out->writeString( "RETURN " );
         gen_value( static_cast< const StmtExpression *>( cmp )->value() );
         m_out->writeString( "\n" );
      break;

      case Statement::t_fordot:
         m_out->writeString( "FORDOT " );
         gen_value( static_cast< const StmtExpression *>( cmp )->value() );
         m_out->writeString( "\n" );
      break;

      case Statement::t_raise:
         m_out->writeString( "RAISE " );
         gen_value( static_cast< const StmtExpression *>( cmp )->value() );
         m_out->writeString( "\n" );
      break;

      case Statement::t_give:
      {
         const StmtGive *give = static_cast< const StmtGive *>( cmp );
         m_out->writeString( "GIVE " );
         gen_array( give->attributes() );
         m_out->writeString( " to " );
         gen_array( give->objects() );
         m_out->writeString( "\n" );
      }
      break;

      case Statement::t_self_print:
      {
         const StmtSelfPrint *sp = static_cast< const StmtSelfPrint *>( cmp );

         m_out->writeString( "FAST PRINT " );

         gen_array( sp->toPrint() );
         m_out->writeString( "\n" );
      }
      break;

      case Statement::t_if:
      {
         m_out->writeString( "IF " );
         const StmtIf *sif = static_cast< const StmtIf *>( cmp );
         gen_value( sif->condition() );
         m_out->writeString( "\n" );
         gen_block( sif->children(), depth );
         const Statement *stmt = sif->elifChildren().front();
         while( stmt != 0 ) {
            generate( stmt, 0, false, depth + 1 );
            stmt = static_cast<const Statement *>(stmt->next());
         }
         gen_block( sif->elseChildren(), depth, "ELSE" );
      }
//.........这里部分代码省略.........

//.........这里部分代码省略.........
   }

   bincode_stream = new FileStream;
   bincode_stream->open( input_file );

   if ( ! bincode_stream->good() )
   {
      stdOut->writeString( "falrun: Can't open file " );
      stdOut->writeString( input_file );
      stdOut->writeString( "\n" );
      stdOut->flush();
      return 1;
   }


   String module_name;
   String source_path;
   findModuleName( input_file, module_name );
   findModulepath( input_file, source_path );

   //-----------------------------------------
   // execute the script.
   //

   if ( source_path != "" )
      source_path += ";";

   try
   {
      ModuleLoader *modloader = new ModuleLoader( source_path + get_load_path() );
      Engine::setSearchPath( modloader->getSearchPath() );

      // set the module preferred language; ok also if default ("") is used
      modloader->setLanguage( module_language );

      Module *core = core_module_init();

      Module *main_mod = modloader->loadModule( bincode_stream );

      VMachine *vmachine = new VMachine(false);
      // change default machine streams.
      vmachine->stdIn( stdIn );
      vmachine->stdOut( stdOut );
      vmachine->stdErr( stdErr );
      vmachine->init();

      vmachine->link( core );
      core->decref();
      Runtime *runtime = new Runtime( modloader );

      // preload required modules

      ListElement *pliter = preloaded.begin();
      while( pliter != 0 )
      {
         Module *module = modloader->loadName( * ((String *) pliter->data()) );
         runtime->addModule( module );
         pliter = pliter->next();
      }

      Item *item_args = vmachine->findGlobalItem( "args" );
      fassert( item_args != 0 );
      CoreArray *args = new CoreArray( argc - script_pos );
      for ( int ap = script_pos; ap < argc; ap ++ ) {
         args->append( new CoreString( argv[ap] ) );
      }
      item_args->setArray( args );

      Item *script_name = vmachine->findGlobalItem( "scriptName" );
      fassert( script_name != 0 );
      script_name->setString( new CoreString( module_name ) );

      // the runtime will try to load the references.
      runtime->addModule( main_mod );

      if( vmachine->link( runtime ) )
      {
         vmachine->launch();

         if ( vmachine->regA().type() == FLC_ITEM_INT )
            return (int32) vmachine->regA().asInteger();

         return 0;
      }

      vmachine->finalize();
   }
   catch ( Error *err )
   {
      String temp;
      err->toString( temp );
      stdErr->writeString( "falcon: FATAL - Program terminated with error.\n" );
      stdErr->writeString( temp + "\n" );
      err->decref();
      return 1;
   }


   return 255;
}