dgxmlscanner.cpp

来自「IBM的解析xml的工具Xerces的源代码」· C++ 代码 · 共 1,902 行 · 第 1/5 页

        fValidator->validateElement(elemDecl);
    }

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

    //  If this is the first element and we are validating, check the root
    //  element.
    if (isRoot)
    {
        fRootGrammar = fGrammar;

        if (fValidate)
        {
            //  If a DocType exists, then check if it matches the root name there.
            if (fRootElemName && !XMLString::equals(qnameRawBuf, fRootElemName))
                fValidator->emitError(XMLValid::RootElemNotLikeDocType);

            //  Some validators may also want to check the root, call the
            //  XMLValidator::checkRootElement
            if (fValidatorFromUser && !fValidator->checkRootElement(elemDecl->getId()))
                fValidator->emitError(XMLValid::RootElemNotLikeDocType);
        }
    }
    else if (fValidate)
    {
        //  If the element stack is not empty, then add this element as a
        //  child of the previous top element. If its empty, this is the root
        //  elem and is not the child of anything.
        fElemStack.addChild(elemDecl->getElementName(), true);
    }

    // Skip any whitespace after the name
    fReaderMgr.skipPastSpaces();

    //  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();
    wasAdded = false;

    fElemCount++;

    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, elemDecl->getFullName());
                    return false;
                }
                else
                {
                    // Something went really wrong
                    return false;
                }
            }

            //  See if this attribute is declared for this element. If we are
            //  not validating of course it will not be at first, but we will
            //  fault it into the pool (to avoid lots of redundant errors.)
            XMLAttDef* attDef = ((DTDElementDecl *)elemDecl)->getAttDef ( fAttNameBuf.getRawBuffer());
            XMLCh * namePtr = fAttNameBuf.getRawBuffer();

            //  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.
            // Note that we want to this first since this will
            // make a copy of the namePtr; we can then make use of
            // that copy in the hashtable lookup that checks
            // for duplicates.  This will mean we may have to update
            // the type of the XMLAttr later.
            XMLAttr* curAtt;
            if (attCount >= curAttListSize)
            {
                if (fDoNamespaces) {
                    curAtt = new (fMemoryManager) XMLAttr
                    (
                        fEmptyNamespaceId
                        , fAttNameBuf.getRawBuffer()
                        , XMLUni::fgZeroLenString
                        , (attDef)?attDef->getType():XMLAttDef::CData
                        , true
                        , fMemoryManager
                    );
                }
                else
                {
                    curAtt = new (fMemoryManager) XMLAttr
                    (
                        -1
                        , fAttNameBuf.getRawBuffer()
                        , XMLUni::fgZeroLenString
                        , XMLUni::fgZeroLenString
                        , (attDef)?attDef->getType():XMLAttDef::CData
                        , true
                        , fMemoryManager
                    );
                }
                fAttrList->addElement(curAtt);
            }
            else
            {
                curAtt = fAttrList->elementAt(attCount);

                if (fDoNamespaces)
                {
                    curAtt->set
                    (
                        fEmptyNamespaceId
                        , fAttNameBuf.getRawBuffer()
                        , XMLUni::fgZeroLenString
                        , (attDef)?attDef->getType():XMLAttDef::CData
                    );
                }
                else
                {
                    curAtt->set
                    (
                        -1
                        , fAttNameBuf.getRawBuffer()
                        , XMLUni::fgZeroLenString
                        , XMLUni::fgZeroLenString
                        , (attDef)?attDef->getType():XMLAttDef::CData
                    );
                }
                curAtt->setSpecified(true);
            }
            // reset namePtr so it refers to newly-allocated memory
            namePtr = (XMLCh *)curAtt->getName();

            // now need to prepare for duplicate detection
            if(attDef)
            {
                unsigned int *curCountPtr = fAttDefRegistry->get(attDef);
                if(!curCountPtr)
                {
                    curCountPtr = getNewUIntPtr();
                    *curCountPtr = fElemCount;
                    fAttDefRegistry->put(attDef, curCountPtr);
                }
                else if(*curCountPtr < fElemCount)
                    *curCountPtr = fElemCount;
                else
                {
                    emitError
                    ( 
                        XMLErrs::AttrAlreadyUsedInSTag
                        , attDef->getFullName()
                        , elemDecl->getFullName()
                    );
                }
            }
            else
            {
                unsigned int *curCountPtr = fUndeclaredAttrRegistry->get(namePtr);
                if(!curCountPtr)
                {
                    curCountPtr = getNewUIntPtr();
                     *curCountPtr = fElemCount;
                    fUndeclaredAttrRegistry->put((void *)namePtr, curCountPtr);
                }
                else if(*curCountPtr < fElemCount)
                    *curCountPtr = fElemCount;
                else
                {
                    emitError
                    ( 
                        XMLErrs::AttrAlreadyUsedInSTag
                        , namePtr
                        , elemDecl->getFullName()
                    );
                }
            }
            if (fValidate)
            {
                if (!attDef)
                {

                    fValidator->emitError
                    (
                        XMLValid::AttNotDefinedForElement
                        , fAttNameBuf.getRawBuffer()
                        , qnameRawBuf
                    );
                }
            }

            //  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(attDef, fAttNameBuf.getRawBuffer(), 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, elemDecl->getFullName());
                    return false;
                }
                else
                {
                    // Something went really wrong
                    return false;
                }
            }
            // must set the newly-minted value on the XMLAttr:
            curAtt->setValue(fAttValueBuf.getRawBuffer());

            //  Now that its all stretched out, lets look at its type and
            //  determine if it has a valid value. It will output any needed
            //  errors, but we just keep going. We only need to do this if
            //  we are validating.
            if (attDef)
            {
                // Let the validator pass judgement on the attribute value
                if (fValidate)
                {
                    fValidator->validateAttrValue
                    (
                        attDef
                        , fAttValueBuf.getRawBuffer()
                        , false
                        , elemDecl
                    );
                }
            }

            if (fDoNamespaces)
            {
                //  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(fAttNameBuf.getRawBuffer(), chColon);
                if (colonFirst != -1)
                {
                    const int colonLast = XMLString::lastIndexOf(fAttNameBuf.getRawBuffer(), chColon);

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

            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, elemDecl->getFullName());
            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, elemDecl->getFullName());
            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();