wfxmlscanner.cpp

来自「IBM的解析xml的工具Xerces的源代码」· C++ 代码 · 共 1,883 行 · 第 1/5 页

            fElements->addElement(elemDecl);
        }

        elemDecl->setElementName(qnameRawBuf, fEmptyNamespaceId);
        fElementLookup->put((void*)elemDecl->getFullName(), elemDecl);
        fElementIndex++;
    }

    // Expand the element stack and add the new element
    fElemStack.addLevel(elemDecl, fReaderMgr.getCurrentReaderNum());

    // reset NS attribute list
    fAttrNSList->removeAllElements();

    // We loop until we either see a /> or >, handling attribute/value
    // pairs until we get there.
    unsigned int attCount = 0;
    unsigned int curAttListSize = fAttrList->size();
    while (true)
    {
        // And get the next non-space character
        XMLCh nextCh = fReaderMgr.peekNextChar();

        //  If the next character is not a slash or closed angle bracket,
        //  then it must be whitespace, since whitespace is required
        //  between the end of the last attribute and the name of the next
        //  one.
        if (attCount)
        {
            if ((nextCh != chForwardSlash) && (nextCh != chCloseAngle))
            {
                if (fReaderMgr.getCurrentReader()->isWhitespace(nextCh))
                {
                    // Ok, skip by them and peek another char
                    fReaderMgr.skipPastSpaces();
                    nextCh = fReaderMgr.peekNextChar();
                }
                else
                {
                    // Emit the error but keep on going
                    emitError(XMLErrs::ExpectedWhitespace);
                }
            }
        }

        //  Ok, here we first check for any of the special case characters.
        //  If its not one, then we do the normal case processing, which
        //  assumes that we've hit an attribute value, Otherwise, we do all
        //  the special case checks.
        if (!fReaderMgr.getCurrentReader()->isSpecialStartTagChar(nextCh))
        {
            //  Assume its going to be an attribute, so get a name from
            //  the input.
            if (!fReaderMgr.getName(fAttNameBuf))
            {
                emitError(XMLErrs::ExpectedAttrName);
                fReaderMgr.skipPastChar(chCloseAngle);
                return false;
            }

            // And next must be an equal sign
            if (!scanEq())
            {
                static const XMLCh tmpList[] =
                {
                    chSingleQuote, chDoubleQuote, chCloseAngle
                    , chOpenAngle, chForwardSlash, chNull
                };

                emitError(XMLErrs::ExpectedEqSign);

                //  Try to sync back up by skipping forward until we either
                //  hit something meaningful.
                const XMLCh chFound = fReaderMgr.skipUntilInOrWS(tmpList);

                if ((chFound == chCloseAngle) || (chFound == chForwardSlash))
                {
                    // Jump back to top for normal processing of these
                    continue;
                }
                else if ((chFound == chSingleQuote)
                      ||  (chFound == chDoubleQuote)
                      ||  fReaderMgr.getCurrentReader()->isWhitespace(chFound))
                {
                    // Just fall through assuming that the value is to follow
                }
                else if (chFound == chOpenAngle)
                {
                    // Assume a malformed tag and that new one is starting
                    emitError(XMLErrs::UnterminatedStartTag, qnameRawBuf);
                    return false;
                }
                else
                {
                    // Something went really wrong
                    return false;
                }
            }

            //  See if this attribute is declared more than one for this element.
            const XMLCh* attNameRawBuf = fAttNameBuf.getRawBuffer();
            unsigned int attNameHash = XMLString::hash(attNameRawBuf, 109, fMemoryManager);
            if (attCount) {

                for (unsigned int k=0; k < attCount; k++) {

                    if (fAttrNameHashList->elementAt(k) == attNameHash) {
                        if (XMLString::equals(
                                fAttrList->elementAt(k)->getQName()
                                , attNameRawBuf))
                        {
                            emitError
                            (
                                XMLErrs::AttrAlreadyUsedInSTag
                                , attNameRawBuf
                                , qnameRawBuf
                            );
                            break;
                        }
                    }
                }
            }

            //  Skip any whitespace before the value and then scan the att
            //  value. This will come back normalized with entity refs and
            //  char refs expanded.
            fReaderMgr.skipPastSpaces();
            if (!scanAttValue(attNameRawBuf, fAttValueBuf))
            {
                static const XMLCh tmpList[] =
                {
                    chCloseAngle, chOpenAngle, chForwardSlash, chNull
                };

                emitError(XMLErrs::ExpectedAttrValue);

                //  It failed, so lets try to get synced back up. We skip
                //  forward until we find some whitespace or one of the
                //  chars in our list.
                const XMLCh chFound = fReaderMgr.skipUntilInOrWS(tmpList);

                if ((chFound == chCloseAngle)
                ||  (chFound == chForwardSlash)
                ||  fReaderMgr.getCurrentReader()->isWhitespace(chFound))
                {
                    //  Just fall through and process this attribute, though
                    //  the value will be "".
                }
                else if (chFound == chOpenAngle)
                {
                    // Assume a malformed tag and that new one is starting
                    emitError(XMLErrs::UnterminatedStartTag, qnameRawBuf);
                    return false;
                }
                else
                {
                    // Something went really wrong
                    return false;
                }
            }

            //  Add this attribute to the attribute list that we use to
            //  pass them to the handler. We reuse its existing elements
            //  but expand it as required.
            const XMLCh* attValueRawBuf = fAttValueBuf.getRawBuffer();
            XMLAttr* curAtt = 0;
            if (attCount >= curAttListSize)
            {
                curAtt = new (fMemoryManager) XMLAttr
                (
                    fEmptyNamespaceId
                    , attNameRawBuf
                    , attValueRawBuf
                    , XMLAttDef::CData
                    , true
                    , fMemoryManager
                );
                fAttrList->addElement(curAtt);
                fAttrNameHashList->addElement(attNameHash);
            }
            else
            {
                curAtt = fAttrList->elementAt(attCount);
                curAtt->set
                (
                    fEmptyNamespaceId
                    , attNameRawBuf
                    , attValueRawBuf
                );
                curAtt->setSpecified(true);
                fAttrNameHashList->setElementAt(attNameHash, attCount);
            }

            // Make sure that the name is basically well formed for namespace
            //  enabled rules. It either has no colons, or it has one which
            //  is neither the first or last char.
            const int colonFirst = XMLString::indexOf(attNameRawBuf, chColon);
            if (colonFirst != -1)
            {
                const int colonLast = XMLString::lastIndexOf(attNameRawBuf, chColon);

                if (colonFirst != colonLast)
                {
                    emitError(XMLErrs::TooManyColonsInName);
                    continue;
                }
                else if ((colonFirst == 0)
                      ||  (colonLast == (int)fAttNameBuf.getLen() - 1))
                {
                    emitError(XMLErrs::InvalidColonPos);
                    continue;
                }
            }

            // Map prefix to namespace
            const XMLCh* attPrefix = curAtt->getPrefix();
            const XMLCh* attLocalName = curAtt->getName();
            const XMLCh* namespaceURI = fAttValueBuf.getRawBuffer();

            if (attPrefix && *attPrefix) {
                if (XMLString::equals(attPrefix, XMLUni::fgXMLString)) {
                    curAtt->setURIId(fXMLNamespaceId);
                }
                else if (XMLString::equals(attPrefix, XMLUni::fgXMLNSString)) {

                    if (XMLString::equals(attLocalName, XMLUni::fgXMLNSString))
                        emitError(XMLErrs::NoUseOfxmlnsAsPrefix);
                    else if (XMLString::equals(attLocalName, XMLUni::fgXMLString)) {
                        if (!XMLString::equals(namespaceURI, XMLUni::fgXMLURIName))
                            emitError(XMLErrs::PrefixXMLNotMatchXMLURI);
                    }

                    if (!namespaceURI)
                        emitError(XMLErrs::NoEmptyStrNamespace, attNameRawBuf);
                    else if(!*namespaceURI && fXMLVersion == XMLReader::XMLV1_0)
                        emitError(XMLErrs::NoEmptyStrNamespace, attNameRawBuf);

                    fElemStack.addPrefix
                    (
                        attLocalName
                        , fURIStringPool->addOrFind(namespaceURI)
                    );
                    curAtt->setURIId(fXMLNSNamespaceId);
                }
                else {
                    fAttrNSList->addElement(curAtt);
                }
            }
            else {
                if (XMLString::equals(XMLUni::fgXMLNSString, attLocalName)) {

                    if (XMLString::equals(namespaceURI, XMLUni::fgXMLNSURIName))
                        emitError(XMLErrs::NoUseOfxmlnsURI);
                    else if (XMLString::equals(namespaceURI, XMLUni::fgXMLURIName))
                        emitError(XMLErrs::XMLURINotMatchXMLPrefix);

                    fElemStack.addPrefix
                    (
                        XMLUni::fgZeroLenString
                        , fURIStringPool->addOrFind(namespaceURI)
                    );
                }
            }

            // increment attribute count
            attCount++;

            // And jump back to the top of the loop
            continue;
        }

        //  It was some special case character so do all of the checks and
        //  deal with it.
        if (!nextCh)
            ThrowXMLwithMemMgr(UnexpectedEOFException, XMLExcepts::Gen_UnexpectedEOF, fMemoryManager);

        if (nextCh == chForwardSlash)
        {
            fReaderMgr.getNextChar();
            isEmpty = true;
            if (!fReaderMgr.skippedChar(chCloseAngle))
                emitError(XMLErrs::UnterminatedStartTag, qnameRawBuf);
            break;
        }
        else if (nextCh == chCloseAngle)
        {
            fReaderMgr.getNextChar();
            break;
        }
        else if (nextCh == chOpenAngle)
        {
            //  Check for this one specially, since its going to be common
            //  and it is kind of auto-recovering since we've already hit the
            //  next open bracket, which is what we would have seeked to (and
            //  skipped this whole tag.)
            emitError(XMLErrs::UnterminatedStartTag, qnameRawBuf);
            break;
        }
        else if ((nextCh == chSingleQuote) || (nextCh == chDoubleQuote))
        {
            //  Check for this one specially, which is probably a missing
            //  attribute name, e.g. ="value". Just issue expected name
            //  error and eat the quoted string, then jump back to the
            //  top again.
            emitError(XMLErrs::ExpectedAttrName);
            fReaderMgr.getNextChar();
            fReaderMgr.skipQuotedString(nextCh);
            fReaderMgr.skipPastSpaces();
            continue;
        }
    }

    // Handle provided attributes that we did not map their prefixes
    for (unsigned int i=0; i < fAttrNSList->size(); i++) {

        XMLAttr* providedAttr = fAttrNSList->elementAt(i);

        providedAttr->setURIId
        (
	        resolvePrefix
            (
                providedAttr->getPrefix(),
                ElemStack::Mode_Attribute
            )
        );
    }

    if(attCount) {

        //
        // Decide if to use hash table to do duplicate checking
        //
        bool toUseHashTable = false;
        setAttrDupChkRegistry(attCount, toUseHashTable);

        // check for duplicate namespace attributes:
        // by checking for qualified names with the same local part and with prefixes 
        // which have been bound to namespace names that are identical. 
        XMLAttr* loopAttr;
        XMLAttr* curAtt;
        for (unsigned int attrIndex=0; attrIndex < attCount-1; attrIndex++) {
            loopAttr = fAttrList->elementAt(attrIndex);

            if (!toUseHashTable)
            {
                for (unsigned int curAttrIndex = attrIndex+1; curAttrIndex < attCount; curAttrIndex++) {
                    curAtt = fAttrList->elementAt(curAttrIndex);
                    if (curAtt->getURIId() == loopAttr->getURIId() &&
                        XMLString::equals(curAtt->getName(), loopAttr->getName())) {
                        emitError
                            ( 
                            XMLErrs::AttrAlreadyUsedInSTag
                            , curAtt->getName()
                            , elemDecl->getFullName()
                            );
                    }
                }
            }
            else 
            {
                if (fAttrDupChkRegistry->containsKey((void*)loopAttr->getName(), loopAttr->getURIId()))
                {
                    emitError
                    ( 
                    XMLErrs::AttrAlreadyUsedInSTag
                    , loopAttr->getName()
                    , elemDecl->getFullName()
                    );
                }

                fAttrDupChkRegistry->put((void*)loopAttr->getName(), loopAttr->getURIId(), loopAttr);
            }
        }  
    }

    // Resolve the qualified name to a URI.
    unsigned int uriId = resolvePrefix