IGXMLScanner2.cpp

        // Put a janitor on the source so it gets cleaned up on exit
        Janitor<InputSource> janSrc(srcUsed);

        //  If the creation failed, and its not because the source was empty,
        //  then emit an error and return.
        if (!reader)
            ThrowXMLwithMemMgr1(RuntimeException, XMLExcepts::Gen_CouldNotOpenExtEntity, srcUsed->getSystemId(), fMemoryManager);

        //  Push the reader. If its a recursive expansion, then emit an error
        //  and return an failure.
        if (!fReaderMgr.pushReader(reader, decl))
        {
            emitError(XMLErrs::RecursiveEntity, decl->getName());
            return EntityExp_Failed;
        }

        // here's where we need to check if there's a SecurityManager,
        // how many entity references we've had
        if(fSecurityManager != 0 && ++fEntityExpansionCount > fEntityExpansionLimit) {
            XMLCh expLimStr[16];
            XMLString::binToText(fEntityExpansionLimit, expLimStr, 15, 10, fMemoryManager);
            emitError
            ( 
                XMLErrs::EntityExpansionLimitExceeded
                , expLimStr
            );
            // there seems nothing  better to be done than to reset the entity expansion counter
            fEntityExpansionCount = 0;
        }

        //  Do a start entity reference event.
        //
        //  <TBD> For now, we supress them in att values. Later, when
        //  the stuff is in place to correctly allow DOM to handle them
        //  we'll turn this back on.
        if (fDocHandler && !inAttVal)
            fDocHandler->startEntityReference(*decl);

        // If it starts with the XML string, then parse a text decl
        if (checkXMLDecl(true))
            scanXMLDecl(Decl_Text);
    }
    else
    {
        //  If its one of the special char references, then we can return
        //  it as a character, and its considered escaped.
        if (decl->getIsSpecialChar())
        {
            firstCh = decl->getValue()[0];
            escaped = true;
            return EntityExp_Returned;
        }

        //  Create a reader over a memory stream over the entity value
        //  We force it to assume UTF-16 by passing in an encoding
        //  string. This way it won't both trying to predecode the
        //  first line, looking for an XML/TextDecl.
        XMLReader* valueReader = fReaderMgr.createIntEntReader
        (
            decl->getName()
            , XMLReader::RefFrom_NonLiteral
            , XMLReader::Type_General
            , decl->getValue()
            , decl->getValueLen()
            , false
        );

        //  Try to push the entity reader onto the reader manager stack,
        //  where it will become the subsequent input. If it fails, that
        //  means the entity is recursive, so issue an error. The reader
        //  will have just been discarded, but we just keep going.
        if (!fReaderMgr.pushReader(valueReader, decl))
            emitError(XMLErrs::RecursiveEntity, decl->getName());

        // here's where we need to check if there's a SecurityManager,
        // how many entity references we've had
        if(fSecurityManager != 0 && ++fEntityExpansionCount > fEntityExpansionLimit) {
            XMLCh expLimStr[16];
            XMLString::binToText(fEntityExpansionLimit, expLimStr, 15, 10, fMemoryManager);
            emitError
            ( 
                XMLErrs::EntityExpansionLimitExceeded
                , expLimStr
            );
        }

        //  Do a start entity reference event.
        //
        //  <TBD> For now, we supress them in att values. Later, when
        //  the stuff is in place to correctly allow DOM to handle them
        //  we'll turn this back on.
        if (fDocHandler && !inAttVal)
            fDocHandler->startEntityReference(*decl);

        // If it starts with the XML string, then it's an error
        if (checkXMLDecl(true)) {
            emitError(XMLErrs::TextDeclNotLegalHere);
            fReaderMgr.skipPastChar(chCloseAngle);
        }
    }
    return EntityExp_Pushed;
}


bool IGXMLScanner::switchGrammar(const XMLCh* const newGrammarNameSpace)
{
    Grammar* tempGrammar = fGrammarResolver->getGrammar(newGrammarNameSpace);

    if (!tempGrammar) {
        // This is a case where namespaces is on with a DTD grammar.
        tempGrammar = fDTDGrammar;
    }
    if (!tempGrammar) {
        return false;
    }
    else {

        fGrammar = tempGrammar;
        fGrammarType = fGrammar->getGrammarType();
        if (fGrammarType == Grammar::SchemaGrammarType && !fValidator->handlesSchema()) {
            if (fValidatorFromUser)
                ThrowXMLwithMemMgr(RuntimeException, XMLExcepts::Gen_NoSchemaValidator, fMemoryManager);
            else {
                fValidator = fSchemaValidator;
            }
        }
        else if (fGrammarType == Grammar::DTDGrammarType && !fValidator->handlesDTD()) {
            if (fValidatorFromUser)
                ThrowXMLwithMemMgr(RuntimeException, XMLExcepts::Gen_NoDTDValidator, fMemoryManager);
            else {
                fValidator = fDTDValidator;
            }
        }

        fValidator->setGrammar(fGrammar);
        return true;
    }
}

// check if we should skip or lax the validation of the element
// if skip - no validation
// if lax - validate only if the element if found
bool IGXMLScanner::laxElementValidation(QName* element, ContentLeafNameTypeVector* cv,
                                        const XMLContentModel* const cm,
                                        const unsigned int parentElemDepth)
{
    bool skipThisOne = false;
    bool laxThisOne = false;
    unsigned int elementURI = element->getURI();
    unsigned int currState = fElemState[parentElemDepth];

    if (currState == XMLContentModel::gInvalidTrans) {
        return laxThisOne;
    }

    SubstitutionGroupComparator comparator(fGrammarResolver, fURIStringPool);

    if (cv) {
        unsigned int i = 0;
        unsigned int leafCount = cv->getLeafCount();

        for (; i < leafCount; i++) {

            QName* fElemMap = cv->getLeafNameAt(i);
            unsigned int uri = fElemMap->getURI();
            unsigned int nextState;
            bool anyEncountered = false;
            ContentSpecNode::NodeTypes type = cv->getLeafTypeAt(i);

            if (type == ContentSpecNode::Leaf) {
                if (((uri == elementURI)
                      && XMLString::equals(fElemMap->getLocalPart(), element->getLocalPart()))
                    || comparator.isEquivalentTo(element, fElemMap)) {

                    nextState = cm->getNextState(currState, i);

                    if (nextState != XMLContentModel::gInvalidTrans) {
                        fElemState[parentElemDepth] = nextState;
                        break;
                    }
                }
            } else if ((type & 0x0f) == ContentSpecNode::Any) {
                anyEncountered = true;
            }
            else if ((type & 0x0f) == ContentSpecNode::Any_Other) {
                if (uri != elementURI) {
                    anyEncountered = true;
                }
            }
            else if ((type & 0x0f) == ContentSpecNode::Any_NS) {
                if (uri == elementURI) {
                    anyEncountered = true;
                }
            }

            if (anyEncountered) {

                nextState = cm->getNextState(currState, i);
                if (nextState != XMLContentModel::gInvalidTrans) {
                    fElemState[parentElemDepth] = nextState;

                    if (type == ContentSpecNode::Any_Skip ||
                        type == ContentSpecNode::Any_NS_Skip ||
                        type == ContentSpecNode::Any_Other_Skip) {
                        skipThisOne = true;
                    }
                    else if (type == ContentSpecNode::Any_Lax ||
                             type == ContentSpecNode::Any_NS_Lax ||
                             type == ContentSpecNode::Any_Other_Lax) {
                        laxThisOne = true;
                    }

                    break;
                }
            }
        } // for

        if (i == leafCount) { // no match
            fElemState[parentElemDepth] = XMLContentModel::gInvalidTrans;
            return laxThisOne;
        }

    } // if

    if (skipThisOne) {
        fValidate = false;
        fElemStack.setValidationFlag(fValidate);
    }

    return laxThisOne;
}


// check if there is an AnyAttribute, and if so, see if we should lax or skip
// if skip - no validation
// if lax - validate only if the attribute if found
bool IGXMLScanner::anyAttributeValidation(SchemaAttDef* attWildCard, unsigned int uriId, bool& skipThisOne, bool& laxThisOne)
{
    XMLAttDef::AttTypes wildCardType = attWildCard->getType();
    bool anyEncountered = false;
    skipThisOne = false;
    laxThisOne = false;
    if (wildCardType == XMLAttDef::Any_Any)
        anyEncountered = true;
    else if (wildCardType == XMLAttDef::Any_Other) {
        if (attWildCard->getAttName()->getURI() != uriId
            && uriId != fEmptyNamespaceId)
            anyEncountered = true;
    }
    else if (wildCardType == XMLAttDef::Any_List) {
        ValueVectorOf<unsigned int>* nameURIList = attWildCard->getNamespaceList();
        unsigned int listSize = (nameURIList) ? nameURIList->size() : 0;

        if (listSize) {
            for (unsigned int i=0; i < listSize; i++) {
                if (nameURIList->elementAt(i) == uriId)
                    anyEncountered = true;
            }
        }
    }

    if (anyEncountered) {
        XMLAttDef::DefAttTypes   defType   = attWildCard->getDefaultType();
        if (defType == XMLAttDef::ProcessContents_Skip) {
            // attribute should just be bypassed,
            skipThisOne = true;
        }
        else if (defType == XMLAttDef::ProcessContents_Lax) {
            laxThisOne = true;
        }
    }

    return anyEncountered;
}

inline XMLAttDefList& getAttDefList(bool              isSchemaGrammar
                                  , ComplexTypeInfo*  currType
                                  , XMLElementDecl*   elemDecl)
{
    if (isSchemaGrammar && currType)
        return currType->getAttDefList();
    else
        return elemDecl->getAttDefList();
}

XERCES_CPP_NAMESPACE_END