parserstate.cxx

SP是一个基于GNU C++编译器

void ParserState::startInstance()
{
  if (!instanceSyntax_.isNull())
    syntax_ = instanceSyntax_;
  currentMode_ = econMode;
  currentDtd_ = dtd_[0];
  currentDtdConst_ = dtd_[0];
  startContent(currentDtd());
  inInstance_ = 1;
  if (sd().rank())
    currentRank_.assign(currentDtd().nRankStem(), StringC());
  currentAttributes_.clear();
  currentAttributes_.resize(currentDtd().nCurrentAttribute());
  idTable_.clear();
}

Id *ParserState::lookupCreateId(const StringC &name)
{
  Id *id = idTable_.lookup(name);
  if (!id) {
    id = new Id(name);
    idTable_.insert(id);
  }
  return id;
}

ConstPtr<Entity>
ParserState::lookupEntity(Boolean isParameter,
			  const StringC &name,
			  const Location &useLocation,
			  Boolean referenced)
{
  Dtd *dtd;
  if (resultAttributeSpecMode_)
    dtd = defComplexLpd().resultDtd().pointer();
  else
    dtd = currentDtd_.pointer();
  if (dtd) {
    Ptr<Entity> entity(dtd->lookupEntity(isParameter, name));
    // Did we find it in pass1Dtd?
    // Did we look at the defaultEntity?
    if (!inInstance_ && pass2() && dtd->isBase()
	&& !resultAttributeSpecMode_
	&& (entity.isNull() || !entity->declInActiveLpd())) {
      ConstPtr<Entity> entity1
	= pass1Dtd_->lookupEntity(isParameter, name);
      if (!entity1.isNull() && entity1->declInActiveLpd()
	  && !entity1->defaulted()) {
	if (referenced)
	  noteReferencedEntity(entity1, 1, 0);
	return entity1;
      }
      else if (!entity.isNull()) {
	if (referenced)
	  noteReferencedEntity(entity, 0, 0);
	entity->setUsed();
	return entity;
      }
    }
    else if (!entity.isNull()) {
      entity->setUsed();
      return entity;
    }
    if (!isParameter) {
      ConstPtr<Entity> entity(dtd->defaultEntity());
      Boolean note = 0;
      Boolean usedPass1 = 0;
      if (!inInstance_ && pass2() && dtd->isBase()
	  && !resultAttributeSpecMode_
	  && (entity.isNull() || !entity->declInActiveLpd())) {
	if (referenced)
	  note = 1;
	ConstPtr<Entity> entity1 = pass1Dtd_->defaultEntity();
	if (!entity1.isNull() && entity1->declInActiveLpd()) {
	  usedPass1 = 1;
	  entity = entity1;
	}
      }
      if (!entity.isNull()) {
	Boolean mustCopy = 1;
	if (inInstance_) {
	  ConstPtr<Entity> tem 
	    = instanceDefaultedEntityTable_.lookupConst(name);
	  if (!tem.isNull()) {
	    entity = tem;
	    mustCopy = 0;
	  }
	}
	if (mustCopy) {
	  Ptr<Entity> p(entity->copy());
	  p->setName(name);
	  p->generateSystemId(*this);
	  p->setDefaulted();
	  entity = p;
	  if (inInstance_) {
	    instanceDefaultedEntityTable_.insert(p);
	    eventHandler().entityDefaulted(new (eventAllocator())
					   EntityDefaultedEvent(entity,
								useLocation));
	  }
	  else
	    dtd->insertEntity(p);
	}
	if (note)
	  noteReferencedEntity(entity, usedPass1, 1);
      }
      else
	entity = undefinedEntityTable_.lookupConst(name);
      return entity;
    }
  }
  return (Entity *)0;
}

ConstPtr<Entity> ParserState::createUndefinedEntity(const StringC &name, const Location &loc)
{
  Text text;
  Ptr<Entity> entity(new InternalCdataEntity(name, loc, text));
  undefinedEntityTable_.insert(entity);
  return entity;
}

void ParserState::noteReferencedEntity(const ConstPtr<Entity> &entity,
				       Boolean foundInPass1Dtd,
				       Boolean lookedAtDefault)
{
  LpdEntityRef ref;
  ref.entity = entity;
  ref.lookedAtDefault = lookedAtDefault;
  ref.foundInPass1Dtd = foundInPass1Dtd;
  LpdEntityRef *old = lpdEntityRefs_.lookup(ref);
  if (!old)
    lpdEntityRefs_.insert(new LpdEntityRef(ref));
}

// Compare entity definitions.
// e1 is the original (will not be an external non-text entity).
// FIXME should look at generated sysids as well.
static
Boolean sameEntityDef(const Entity *e1, const Entity *e2)
{
  if (e1->dataType() != e2->dataType())
    return 0;
  const InternalEntity *i1 = e1->asInternalEntity();
  const InternalEntity *i2 = e2->asInternalEntity();
  if (i1) {
    if (!i2)
      return 0;
    if (i1->string() != i2->string())
      return 0;
    return 1;
  }
  else if (i2)
    return 0;
  const ExternalEntity *x1 = e1->asExternalEntity();
  const ExternalEntity *x2 = e2->asExternalEntity();
  const StringC *s1 = x1->externalId().systemIdString();
  const StringC *s2 = x2->externalId().systemIdString();
  if (s1) {
    if (!s2)
      return 0;
    if (*s1 != *s2)
      return 0;
  }
  else if (s2)
    return 0;
  s1 = x1->externalId().publicIdString();
  s2 = x2->externalId().publicIdString();
  if (s1) {
    if (!s2)
      return 0;
    if (*s1 != *s2)
      return 0;
  }
  else if (s2)
    return 0;
  return 1;
}

void ParserState::checkEntityStability()
{
  LpdEntityRefSetIter iter(lpdEntityRefs_);
  LpdEntityRef *ref;
  while ((ref = iter.next()) != 0) {
    ConstPtr<Entity> entity
      = dtd_[0]->lookupEntity(ref->entity->declType()
			      == Entity::parameterEntity,
			      ref->entity->name());
    if (entity.isNull() && ref->lookedAtDefault)
      entity = dtd_[0]->defaultEntity();
    if (entity.isNull()
	? ref->foundInPass1Dtd
	: !sameEntityDef(ref->entity.pointer(), entity.pointer()))
      message(((ref->entity->declType()
		== Entity::parameterEntity)
	       ? ParserMessages::unstableLpdParameterEntity
	       : ParserMessages::unstableLpdGeneralEntity),
	      StringMessageArg(ref->entity->name()));
  }
  {
    // Ensure that the memory is released.
    LpdEntityRefSet tem;
    lpdEntityRefs_.swap(tem);
  }
}    

Boolean ParserState::appendCurrentRank(StringC &str, const RankStem *stem)
     const
{
  const StringC &suffix = currentRank_[stem->index()];
  if (suffix.size() > 0) {
    str += suffix;
    return 1;
  }
  return 0;
}

void ParserState::setCurrentRank(const RankStem *stem, const StringC &suffix)
{
  currentRank_[stem->index()] = suffix;
}

void ParserState::getCurrentToken(const SubstTable<Char> *subst,
				  StringC &str) const
{
  InputSource *in = currentInput();
  const Char *p = in->currentTokenStart();
  size_t count = in->currentTokenLength();
  str.resize(count);
  StringC::iterator s = str.begin();
  for (; count > 0; --count)
    *s++ = (*subst)[*p++];
}

void ParserState::queueMessage(MessageEvent *event)
{
  if (cancelled()) {
    delete event;
    return;
  }
  if (keepingMessages_)
    keptMessages_.append(event);
  else
    handler_->message(event);
}

void ParserState::releaseKeptMessages()
{
  keepingMessages_ = 0;
  while (!keptMessages_.empty()) {
    if (cancelled()) {
      allDone();
      return;
    }
    handler_->message(keptMessages_.get());
  }
}

void ParserState::discardKeptMessages()
{
  keepingMessages_ = 0;
  keptMessages_.clear();
}

void ParserState::initMessage(Message &msg)
{
  if (inInstance()) {
    StringC rniPcdata = syntax().delimGeneral(Syntax::dRNI);
    rniPcdata += syntax().reservedName(Syntax::rPCDATA);
    getOpenElementInfo(msg.openElementInfo, rniPcdata);
  }
  msg.loc = currentLocation();
}

void ParserState::dispatchMessage(Message &msg)
{
  queueMessage(new MessageEvent(msg));
}

void ParserState::dispatchMessage(const Message &msg)
{
  queueMessage(new MessageEvent(msg));
}

AttributeList *
ParserState::allocAttributeList(const ConstPtr<AttributeDefinitionList> &def,
				unsigned i)
{
  if (i < attributeLists_.size())
    attributeLists_[i]->init(def);
  else {
    attributeLists_.resize(i + 1);
    attributeLists_[i] = new AttributeList(def);
  }
  return attributeLists_[i].pointer();
}

void ParserState::activateLinkType(const StringC &name)
{
  if (!hadPass2Start_ && !pass2_)
    activeLinkTypes_.push_back(name);
  else
    message(ParserMessages::linkActivateTooLate);
}

Boolean ParserState::shouldActivateLink(const StringC &name) const
{
  if (!activeLinkTypesSubsted_) {
    // FIXME use mutable
    ParserState *state = (ParserState *)this;
    for (size_t i = 0; i < activeLinkTypes_.size(); i++)
      for (size_t j = 0; j < activeLinkTypes_[i].size(); j++)
	syntax().generalSubstTable()->subst(state->activeLinkTypes_[i][j]);
    state->activeLinkTypesSubsted_ = 1;
  }
  for (size_t i = 0; i < activeLinkTypes_.size(); i++)
    if (name == activeLinkTypes_[i])
      return 1;
  return 0;
}

Ptr<Dtd> ParserState::lookupDtd(const StringC &name)
{
  for (size_t i = 0; i < dtd_.size(); i++)
    if (dtd_[i]->name() == name)
      return dtd_[i];
  return Ptr<Dtd>();
}

ConstPtr<Lpd> ParserState::lookupLpd(const StringC &name) const
{
  for (size_t i = 0; i < allLpd_.size(); i++)
    if (allLpd_[i]->name() == name)
      return allLpd_[i];
  return ConstPtr<Lpd>();
}

ConstPtr<Notation> ParserState::getAttributeNotation(const StringC &name,
						     const Location &)
{
  ConstPtr<Notation> notation;
  if (haveCurrentDtd())
    notation = currentDtd().lookupNotation(name);
  else if (resultAttributeSpecMode_) {
    const Dtd *resultDtd = defComplexLpd().resultDtd().pointer();
    if (!resultDtd)
      return 0;
    notation = resultDtd->lookupNotation(name);
  }
  return notation; 
}

ConstPtr<Entity> ParserState::getAttributeEntity(const StringC &str,
						 const Location &loc)
{
  ConstPtr<Entity> entity = lookupEntity(0, str, loc, 0);
  if (!entity.isNull()
      && entity->defaulted()
      && options().warnDefaultEntityReference) {
    setNextLocation(loc);
    message(ParserMessages::defaultEntityInAttribute,
	    StringMessageArg(str));
  }
  return entity;
}

Boolean ParserState::defineId(const StringC &str, const Location &loc,
			      Location &prevLoc)
{
  if (!inInstance() || !validate())
    return 1;
  Id *id = lookupCreateId(str);
  if (id->defined()) {
    prevLoc = id->defLocation();
    return 0;
  }
  id->define(loc);
  return 1;
}

void ParserState::noteIdref(const StringC &str, const Location &loc)
{
  if (!inInstance() || !options().errorIdref || !validate())
    return;
  Id *id = lookupCreateId(str);
  if (!id->defined())
    id->addPendingRef(loc);
}

void ParserState::noteCurrentAttribute(size_t i, AttributeValue *value)
{
  if (inInstance())
    currentAttributes_[i] = value;
}

ConstPtr<AttributeValue> ParserState::getCurrentAttribute(size_t i) const
{
  if (!inInstance())
    return ConstPtr<AttributeValue>();
  return currentAttributes_[i];
}

const Syntax &ParserState::attributeSyntax() const
{
  return syntax();
}

#ifdef SP_NAMESPACE
}
#endif