IGXMLScanner.cpp

            loadedGrammar = loadXMLSchemaGrammar(src, toCache);
        }
        else if (grammarType == Grammar::DTDGrammarType) {
            loadedGrammar = loadDTDGrammar(src, toCache);
        }

        // Reset the reader manager to close all files, sockets, etc...
        fReaderMgr.reset();
    }
    //  NOTE:
    //
    //  In all of the error processing below, the emitError() call MUST come
    //  before the flush of the reader mgr, or it will fail because it tries
    //  to find out the position in the XML source of the error.
    catch(const XMLErrs::Codes)
    {
        // This is a 'first fatal error' type exit, so reset and fall through
        fReaderMgr.reset();
    }
    catch(const XMLValid::Codes)
    {
        // This is a 'first fatal error' type exit, so reset and fall through
        fReaderMgr.reset();

    }
    catch(const XMLException& excToCatch)
    {
        //  Emit the error and catch any user exception thrown from here. Make
        //  sure in all cases we flush the reader manager.
        fInException = true;
        try
        {
            if (excToCatch.getErrorType() == XMLErrorReporter::ErrType_Warning)
                emitError
                (
                    XMLErrs::DisplayErrorMessage
                    , excToCatch.getMessage()
                );
            else if (excToCatch.getErrorType() >= XMLErrorReporter::ErrType_Fatal)
                emitError
                (
                    XMLErrs::XMLException_Fatal
                    , excToCatch.getType()
                    , excToCatch.getMessage()
                );
            else
                emitError
                (
                    XMLErrs::XMLException_Error
                    , excToCatch.getType()
                    , excToCatch.getMessage()
                );
        }
        catch(const OutOfMemoryException&)
        {
            throw;
        }
        catch(...)
        {
            // Flush the reader manager and rethrow user's error
            fReaderMgr.reset();
            throw;
        }

        // If it returned, then reset the reader manager and fall through
        fReaderMgr.reset();
    }
    catch(const OutOfMemoryException&)
    {
        throw;
    }
    catch(...)
    {
        // Reset and rethrow
        fReaderMgr.reset();
        throw;
    }

    return loadedGrammar;
}

Grammar* IGXMLScanner::loadDTDGrammar(const InputSource& src,
                                      const bool toCache)
{
    // Reset the validators
    fDTDValidator->reset();
    if (fValidatorFromUser)
        fValidator->reset();

    if (!fValidator->handlesDTD()) {
        if (fValidatorFromUser && fValidate)
            ThrowXML(RuntimeException, XMLExcepts::Gen_NoDTDValidator);
        else {
            fValidator = fDTDValidator;
        }
    }

    fDTDGrammar = (DTDGrammar*) fGrammarResolver->getGrammar(XMLUni::fgDTDEntityString);

    if (fDTDGrammar) {
        fDTDGrammar->reset();
    }
    else {
        fDTDGrammar = new (fGrammarPoolMemoryManager) DTDGrammar(fGrammarPoolMemoryManager);
        fGrammarResolver->putGrammar(fDTDGrammar);
    }

    fGrammar = fDTDGrammar;
    fGrammarType = fGrammar->getGrammarType();
    fValidator->setGrammar(fGrammar);

    //  And for all installed handlers, send reset events. This gives them
    //  a chance to flush any cached data.
    if (fDocHandler)
        fDocHandler->resetDocument();
    if (fEntityHandler)
        fEntityHandler->resetEntities();
    if (fErrorReporter)
        fErrorReporter->resetErrors();

    // Clear out the id reference list
    resetValidationContext();
    // and clear out the darned undeclared DTD element pool...
    fDTDElemNonDeclPool->removeAll();

    if (toCache) {

        unsigned int sysId = fGrammarResolver->getStringPool()->addOrFind(src.getSystemId());
        const XMLCh* sysIdStr = fGrammarResolver->getStringPool()->getValueForId(sysId);
              
        fGrammarResolver->orphanGrammar(XMLUni::fgDTDEntityString);
        ((XMLDTDDescription*) (fGrammar->getGrammarDescription()))->setRootName(sysIdStr);
        fGrammarResolver->putGrammar(fGrammar);
    }

    //  Handle the creation of the XML reader object for this input source.
    //  This will provide us with transcoding and basic lexing services.
    XMLReader* newReader = fReaderMgr.createReader
    (
        src
        , false
        , XMLReader::RefFrom_NonLiteral
        , XMLReader::Type_General
        , XMLReader::Source_External
        , fCalculateSrcOfs
    );
    if (!newReader) {
        if (src.getIssueFatalErrorIfNotFound())
            ThrowXML1(RuntimeException, XMLExcepts::Scan_CouldNotOpenSource, src.getSystemId());
        else
            ThrowXML1(RuntimeException, XMLExcepts::Scan_CouldNotOpenSource_Warning, src.getSystemId());
    }

    //  In order to make the processing work consistently, we have to
    //  make this look like an external entity. So create an entity
    //  decl and fill it in and push it with the reader, as happens
    //  with an external entity. Put a janitor on it to insure it gets
    //  cleaned up. The reader manager does not adopt them.
    const XMLCh gDTDStr[] = { chLatin_D, chLatin_T, chLatin_D , chNull };
    DTDEntityDecl* declDTD = new (fGrammarPoolMemoryManager) DTDEntityDecl(gDTDStr, false, fGrammarPoolMemoryManager);
    declDTD->setSystemId(src.getSystemId());
    Janitor<DTDEntityDecl> janDecl(declDTD);

    // Mark this one as a throw at end
    newReader->setThrowAtEnd(true);

    // And push it onto the stack, with its pseudo name
    fReaderMgr.pushReader(newReader, declDTD);

    //  If we have a doc type handler and advanced callbacks are enabled,
    //  call the doctype event.
    if (fDocTypeHandler) {

        // Create a dummy root
        DTDElementDecl* rootDecl = new (fGrammarPoolMemoryManager) DTDElementDecl
        (
            gDTDStr
            , fEmptyNamespaceId
            , DTDElementDecl::Any
            , fGrammarPoolMemoryManager
        );
        rootDecl->setCreateReason(DTDElementDecl::AsRootElem);
        rootDecl->setExternalElemDeclaration(true);
        Janitor<DTDElementDecl> janSrc(rootDecl);

        fDocTypeHandler->doctypeDecl(*rootDecl, src.getPublicId(), src.getSystemId(), false, true);
    }

    // Create DTDScanner
    DTDScanner dtdScanner
    (
        (DTDGrammar*) fGrammar
        , fDocTypeHandler
        , fGrammarPoolMemoryManager
        , fMemoryManager
    );
    dtdScanner.setScannerInfo(this, &fReaderMgr, &fBufMgr);

    // Tell it its not in an include section
    dtdScanner.scanExtSubsetDecl(false, true);

    if (fValidate) {
        //  validate the DTD scan so far
        fValidator->preContentValidation(false, true);
    }

    if (toCache)
        fGrammarResolver->cacheGrammars();

    return fDTDGrammar;
}

// ---------------------------------------------------------------------------
//  IGXMLScanner: Helper methods
// ---------------------------------------------------------------------------
void IGXMLScanner::processSchemaLocation(XMLCh* const schemaLoc)
{
    XMLCh* locStr = schemaLoc;
    XMLReader* curReader = fReaderMgr.getCurrentReader();

    fLocationPairs->removeAllElements();
    while (*locStr)
    {
        do {
            if (!curReader->isWhitespace(*locStr))
               break;

            *locStr = chNull;
        } while (*++locStr);

        if (*locStr) {
            
            fLocationPairs->addElement(locStr);

            while (*++locStr) {
                if (curReader->isWhitespace(*locStr))
                    break;
            }
        }
    }
}

XERCES_CPP_NAMESPACE_END