qxmlstream_p.h

奇趣公司比较新的qt/emd版本

        return true;
    }


    QIODevice *device;
    bool deleteDevice;
#ifndef QT_NO_TEXTCODEC
    QTextCodec *codec;
    QTextDecoder *decoder;
#endif
    bool atEnd;

    /*!
      \sa setType()
     */
    QXmlStreamReader::TokenType type;
    QXmlStreamReader::Error error;
    QString errorString;

    qint64 lineNumber, lastLineStart, characterOffset;


    void write(const QString &);
    void write(const char *);


    QXmlStreamAttributes attributes;
    QStringRef namespaceForPrefix(const QStringRef &prefix);
    void resolveTag();
    void resolvePublicNamespaces();
    void resolveDtd();
    uint resolveCharRef(int symbolIndex);
    bool checkStartDocument();
    void startDocument(const QStringRef &version);
    void parseError();
    void checkPublicLiteral(const QStringRef &publicId);

    bool scanDtd;
    QStringRef lastAttributeValue;
    bool lastAttributeIsCData;
    struct DtdAttribute {
        QStringRef tagName;
        QStringRef attributeQualifiedName;
        QStringRef attributePrefix;
        QStringRef attributeName;
        QStringRef defaultValue;
        bool isCDATA;
    };
    QXmlStreamSimpleStack<DtdAttribute> dtdAttributes;
    struct NotationDeclaration {
        QStringRef name;
        QStringRef publicId;
        QStringRef systemId;
    };
    QXmlStreamSimpleStack<NotationDeclaration> notationDeclarations;
    QXmlStreamNotationDeclarations publicNotationDeclarations;
    QXmlStreamNamespaceDeclarations publicNamespaceDeclarations;

    struct EntityDeclaration {
        QStringRef name;
        QStringRef notationName;
        QStringRef publicId;
        QStringRef systemId;
        QStringRef value;
        bool parameter;
        bool external;
        inline void clear() {
            name.clear();
            notationName.clear();
            publicId.clear();
            systemId.clear();
            value.clear();
            parameter = external = false;
        }
    };
    QXmlStreamSimpleStack<EntityDeclaration> entityDeclarations;
    QXmlStreamEntityDeclarations publicEntityDeclarations;

    QStringRef text;

    QStringRef prefix, namespaceUri, qualifiedName, name;
    QStringRef processingInstructionTarget, processingInstructionData;
    uint isEmptyElement : 1;
    uint isWhitespace : 1;
    uint isCDATA : 1;
    uint standalone : 1;
    uint hasCheckedStartDocument : 1;
    uint normalizeLiterals : 1;
    uint hasSeenTag : 1;
    uint inParseEntity : 1;
    uint referenceToUnparsedEntityDetected : 1;
    uint referenceToParameterEntityDetected : 1;
    uint hasExternalDtdSubset : 1;
    uint lockEncoding : 1;
    uint namespaceProcessing : 1;

    int resumeReduction;
    void resume(int rule);

    inline bool entitiesMustBeDeclared() const {
        return (!inParseEntity
                && (standalone
                    || (!referenceToUnparsedEntityDetected
                        && !referenceToParameterEntityDetected // Errata 13 as of 2006-04-25
                        && !hasExternalDtdSubset)));
    }

    // qlalr parser
    int tos;
    int stack_size;
    struct Value {
        int pos;
        int len;
        int prefix;
        ushort c;
    };

    Value *sym_stack;
    int *state_stack;
    inline void reallocateStack();
    inline Value &sym(int index) const
    { return sym_stack[tos + index - 1]; }
    QString textBuffer;
    inline void clearTextBuffer() {
        if (!scanDtd) {
            textBuffer.resize(0);
            textBuffer.reserve(256);
        }
    }
    struct Attribute {
        Value key;
        Value value;
    };
    QXmlStreamSimpleStack<Attribute> attributeStack;

    inline QStringRef symString(int index) {
        const Value &symbol = sym(index);
        return QStringRef(&textBuffer, symbol.pos + symbol.prefix, symbol.len - symbol.prefix);
    }
    inline QStringRef symName(int index) {
        const Value &symbol = sym(index);
        return QStringRef(&textBuffer, symbol.pos, symbol.len);
    }
    inline QStringRef symString(int index, int offset) {
        const Value &symbol = sym(index);
        return QStringRef(&textBuffer, symbol.pos + symbol.prefix + offset, symbol.len - symbol.prefix -  offset);
    }
    inline QStringRef symPrefix(int index) {
        const Value &symbol = sym(index);
        if (symbol.prefix)
            return QStringRef(&textBuffer, symbol.pos, symbol.prefix - 1);
        return QStringRef();
    }
    inline QStringRef symString(const Value &symbol) {
        return QStringRef(&textBuffer, symbol.pos + symbol.prefix, symbol.len - symbol.prefix);
    }
    inline QStringRef symName(const Value &symbol) {
        return QStringRef(&textBuffer, symbol.pos, symbol.len);
    }
    inline QStringRef symPrefix(const Value &symbol) {
        if (symbol.prefix)
            return QStringRef(&textBuffer, symbol.pos, symbol.prefix - 1);
        return QStringRef();
    }

    inline void clearSym() { Value &val = sym(1); val.pos = textBuffer.size(); val.len = 0; }


    short token;
    ushort token_char;

    uint filterCarriageReturn();
    inline uint getChar();
    inline uint peekChar();
    inline void putChar(uint c) { putStack.push() = c; }
    inline void putChar(QChar c) { putStack.push() =  c.unicode(); }
    void putString(const QString &s, int from = 0);
    void putStringLiteral(const QString &s);
    void putReplacement(const QString &s);
    void putReplacementInAttributeValue(const QString &s);
    ushort getChar_helper();

    bool scanUntil(const char *str, short tokenToInject = -1);
    bool scanString(const char *str, short tokenToInject, bool requireSpace = true);
    inline void injectToken(ushort tokenToInject) {
        putChar(int(tokenToInject) << 16);
    }

    static bool validateName(const QStringRef &name);

    void parseEntity(const QString &value);
    QXmlStreamReaderPrivate *entityParser;

    bool scanAfterLangleBang();
    bool scanPublicOrSystem();
    bool scanNData();
    bool scanAfterDefaultDecl();
    bool scanAttType();


    // scan optimization functions. Not strictly necessary but LALR is
    // not very well suited for scanning fast
    int fastScanLiteralContent();
    int fastScanSpace();
    int fastScanContentCharList();
    int fastScanName(int *prefix = 0);
    inline int fastScanNMTOKEN();


    bool parse();
    inline void consumeRule(int);

    void raiseError(QXmlStreamReader::Error error, const QString& message = QString());
    void raiseWellFormedError(const QString &message);

private:
    /*! \internal
       Never assign to variable type directly. Instead use this function.

       This prevents errors from being ignored.
     */
    inline void setType(const QXmlStreamReader::TokenType t)
    {
        if(type != QXmlStreamReader::Invalid)
            type = t;
    }
};

bool QXmlStreamReaderPrivate::parse()
{
    // cleanup currently reported token

    switch (type) {
    case QXmlStreamReader::StartElement:
        name.clear();
        prefix.clear();
	qualifiedName.clear();
        namespaceUri.clear();
        if (publicNamespaceDeclarations.size())
            publicNamespaceDeclarations.clear();
        if (attributes.size())
            attributes.resize(0);
        if (isEmptyElement) {
            setType(QXmlStreamReader::EndElement);
            Tag &tag = tagStack_pop();
            namespaceUri = tag.namespaceDeclaration.namespaceUri;
            name = tag.name;
	    qualifiedName = tag.qualifiedName;
            isEmptyElement = false;
            return true;
        }
        clearTextBuffer();
        break;
    case QXmlStreamReader::EndElement:
        name.clear();
        prefix.clear();
	qualifiedName.clear();
        namespaceUri.clear();
        clearTextBuffer();
        break;
    case QXmlStreamReader::DTD:
        publicNotationDeclarations.clear();
        publicEntityDeclarations.clear();
        // fall through
    case QXmlStreamReader::Comment:
    case QXmlStreamReader::Characters:
        isCDATA = isWhitespace = false;
        text.clear();
        clearTextBuffer();
        break;
    case QXmlStreamReader::EntityReference:
        text.clear();
        name.clear();
        clearTextBuffer();
        break;
    case QXmlStreamReader::ProcessingInstruction:
        processingInstructionTarget.clear();
        processingInstructionData.clear();
	clearTextBuffer();
        break;
    case QXmlStreamReader::NoToken:
    case QXmlStreamReader::Invalid:
        break;
    case QXmlStreamReader::StartDocument:
	lockEncoding = true;
#ifndef QT_NO_TEXTCODEC
	if(decoder->hasFailure()) {
	    raiseWellFormedError(QXmlStream::tr("Encountered incorrectly encoded content."));
	    readBuffer.clear();
	    return false;
	}
#endif
        // fall through
    default:
        clearTextBuffer();
        ;
    }

    setType(QXmlStreamReader::NoToken);


    // the main parse loop
    int act, r;

    if (resumeReduction) {
        act = state_stack[tos-1];
        r = resumeReduction;
        resumeReduction = 0;
        goto ResumeReduction;
    }

    act = state_stack[tos];

    forever {
        if (token == -1 && - TERMINAL_COUNT != action_index[act]) {
            uint cu = getChar();
            token = NOTOKEN;
            token_char = cu;
            if (cu & 0xff0000) {
                token = cu >> 16;
            } else switch (token_char) {
            case 0xfffe:
            case 0xffff:
                token = ERROR;
                break;
            case '\r':
                token = SPACE;
                if (cu == '\r') {
                    if ((token_char = filterCarriageReturn())) {
                        ++lineNumber;
                        lastLineStart = characterOffset + readBufferPos;
                        break;
                    }
                } else {
                    break;
                }
                // fall through
            case '\0': {
                token = EOF_SYMBOL;
                if (!tagsDone && !inParseEntity) {
                    int a = t_action(act, token);
                    if (a < 0) {
                        raiseError(QXmlStreamReader::PrematureEndOfDocumentError);
                        return false;
                    }
                }

            } break;
            case '\n':
                ++lineNumber;
                lastLineStart = characterOffset + readBufferPos;
            case ' ':
            case '\t':
                token = SPACE;
                break;
            case '&':
                token = AMPERSAND;
                break;
            case '#':
                token = HASH;
                break;
            case '\'':
                token = QUOTE;
                break;
            case '\"':
                token = DBLQUOTE;
                break;
            case '<':
                token = LANGLE;
                break;
            case '>':
                token = RANGLE;
                break;
            case '[':
                token = LBRACK;
                break;