qxmlstream.cpp

奇趣公司比较新的qt/emd版本

            return true;
        if (scanString(spell[NMTOKEN], NMTOKEN))
            return true;
        return scanString(spell[NMTOKENS], NMTOKENS);
    default:
        ;
    }
    return false;
}

/*!
 \internal

 Scan strings with quotes or apostrophes surround them. For instance,
 attributes, the version and encoding field in the XML prolog and
 entity declarations.

 If normalizeLiterals is set to true, the function also normalizes
 whitespace. It is set to true when the first start tag is
 encountered.

 */
inline int QXmlStreamReaderPrivate::fastScanLiteralContent()
{
    int n = 0;
    uint c;
    while ((c = getChar())) {
        switch (ushort(c)) {
        case 0xfffe:
        case 0xffff:
        case 0:
            /* The putChar() call is necessary so the parser re-gets
             * the character from the input source, when raising an error. */
            putChar(c);
            return n;
        case '\r':
            if (filterCarriageReturn() == 0)
                return n;
            // fall through
        case '\n':
            ++lineNumber;
            lastLineStart = characterOffset + readBufferPos;
            // fall through
        case ' ':
        case '\t':
            if (normalizeLiterals)
                textBuffer.inline_append(QLatin1Char(' '));
            else
                textBuffer.inline_append(c);
            ++n;
            break;
        case '&':
        case '<':
        case '\"':
        case '\'':
            if (!(c & 0xff0000)) {
                putChar(c);
                return n;
            }
            // fall through
        default:
            textBuffer.inline_append(c);
            ++n;
        }
    }
    return n;
}

inline int QXmlStreamReaderPrivate::fastScanSpace()
{
    int n = 0;
    ushort c;
    while ((c = getChar())) {
        switch (c) {
        case '\r':
            if ((c = filterCarriageReturn()) == 0)
                return n;
            // fall through
        case '\n':
            ++lineNumber;
            lastLineStart = characterOffset + readBufferPos;
            // fall through
        case ' ':
        case '\t':
            textBuffer.inline_append(c);
            ++n;
            break;
        default:
            putChar(c);
            return n;
        }
    }
    return n;
}

/*!
  \internal

  Used for text nodes essentially. That is, characters appearing
  inside elements.
 */
inline int QXmlStreamReaderPrivate::fastScanContentCharList()
{
    int n = 0;
    uint c;
    while ((c = getChar())) {
        switch (ushort(c)) {
        case 0xfffe:
        case 0xffff:
        case 0:
            putChar(c);
            return n;
        case ']': {
            int pos = textBuffer.size();
            textBuffer.inline_append(ushort(c));
            ++n;
            while ((c = getChar()) == ']') {
                textBuffer.inline_append(ushort(c));
                ++n;
            }
            if (c == 0) {
                putString(textBuffer, pos);
                textBuffer.resize(pos);
            } else if (c == '>') {
                raiseWellFormedError(QXmlStream::tr("Sequence ']]>' not allowed in content."));
            } else {
                putChar(c);
                break;
            }
            return n;
        } break;
        case '\r':
            if ((c = filterCarriageReturn()) == 0)
                return n;
            // fall through
        case '\n':
            ++lineNumber;
            lastLineStart = characterOffset + readBufferPos;
            // fall through
        case ' ':
        case '\t':
            textBuffer.inline_append(ushort(c));
            ++n;
            break;
        case '&':
        case '<':
            if (!(c & 0xff0000)) {
                putChar(c);
                return n;
            }
            // fall through
        default:
            if (c < 0x20) {
                putChar(c);
                return n;
            }
            isWhitespace = false;
            textBuffer.inline_append(ushort(c));
            ++n;
        }
    }
    return n;
}

inline int QXmlStreamReaderPrivate::fastScanName(int *prefix)
{
    int n = 0;
    ushort c;
    while ((c = getChar())) {
        switch (c) {
        case '\n':
        case ' ':
        case '\t':
        case '\r':
        case '&':
        case '#':
        case '\'':
        case '\"':
        case '<':
        case '>':
        case '[':
        case ']':
        case '=':
        case '%':
        case '/':
        case ';':
        case '?':
        case '!':
        case '^':
        case '|':
        case ',':
        case '(':
        case ')':
        case '+':
        case '*':
            putChar(c);
            if (prefix && *prefix == n+1) {
                *prefix = 0;
                putChar(':');
                --n;
            }
            return n;
        case ':':
            if (prefix) {
                if (*prefix == 0) {
                    *prefix = n+2;
                } else { // only one colon allowed according to the namespace spec.
                    putChar(c);
                    return n;
                }
            } else {
                putChar(c);
                return n;
            }
            // fall through
        default:
            textBuffer.inline_append(c);
            ++n;
        }
    }

    if (prefix)
        *prefix = 0;
    int pos = textBuffer.size() - n;
    putString(textBuffer, pos);
    textBuffer.resize(pos);
    return 0;
}

enum NameChar { NameBeginning, NameNotBeginning, NotName };

static const char Begi = (char)NameBeginning;
static const char NtBg = (char)NameNotBeginning;
static const char NotN = (char)NotName;

static const char nameCharTable[128] =
{
// 0x00
    NotN, NotN, NotN, NotN, NotN, NotN, NotN, NotN,
    NotN, NotN, NotN, NotN, NotN, NotN, NotN, NotN,
// 0x10
    NotN, NotN, NotN, NotN, NotN, NotN, NotN, NotN,
    NotN, NotN, NotN, NotN, NotN, NotN, NotN, NotN,
// 0x20 (0x2D is '-', 0x2E is '.')
    NotN, NotN, NotN, NotN, NotN, NotN, NotN, NotN,
    NotN, NotN, NotN, NotN, NotN, NtBg, NtBg, NotN,
// 0x30 (0x30..0x39 are '0'..'9', 0x3A is ':')
    NtBg, NtBg, NtBg, NtBg, NtBg, NtBg, NtBg, NtBg,
    NtBg, NtBg, Begi, NotN, NotN, NotN, NotN, NotN,
// 0x40 (0x41..0x5A are 'A'..'Z')
    NotN, Begi, Begi, Begi, Begi, Begi, Begi, Begi,
    Begi, Begi, Begi, Begi, Begi, Begi, Begi, Begi,
// 0x50 (0x5F is '_')
    Begi, Begi, Begi, Begi, Begi, Begi, Begi, Begi,
    Begi, Begi, Begi, NotN, NotN, NotN, NotN, Begi,
// 0x60 (0x61..0x7A are 'a'..'z')
    NotN, Begi, Begi, Begi, Begi, Begi, Begi, Begi,
    Begi, Begi, Begi, Begi, Begi, Begi, Begi, Begi,
// 0x70
    Begi, Begi, Begi, Begi, Begi, Begi, Begi, Begi,
    Begi, Begi, Begi, NotN, NotN, NotN, NotN, NotN
};

static inline NameChar fastDetermineNameChar(QChar ch)
{
    ushort uc = ch.unicode();
    if (!(uc & ~0x7f)) // uc < 128
        return (NameChar)nameCharTable[uc];

    QChar::Category cat = ch.category();
    // ### some these categories might be slightly wrong
    if ((cat >= QChar::Letter_Uppercase && cat <= QChar::Letter_Other)
        || cat == QChar::Number_Letter)
        return NameBeginning;
    if ((cat >= QChar::Number_DecimalDigit && cat <= QChar::Number_Other)
                || (cat >= QChar::Mark_NonSpacing && cat <= QChar::Mark_Enclosing))
        return NameNotBeginning;
    return NotName;
}

inline int QXmlStreamReaderPrivate::fastScanNMTOKEN()
{
    int n = 0;
    uint c;
    while ((c = getChar())) {
        if (fastDetermineNameChar(c) == NotName) {
            putChar(c);
            return n;
        } else {
            ++n;
            textBuffer.inline_append(c);
        }
    }

    int pos = textBuffer.size() - n;
    putString(textBuffer, pos);
    textBuffer.resize(pos);

    return n;
}

bool QXmlStreamReaderPrivate::validateName(const QStringRef &name)
{
    if (fastDetermineNameChar(name.at(0)) != NameBeginning)
        return false;
    for (int i = 1; i < name.size(); ++i)
        if (fastDetermineNameChar(name.at(i)) == NotName)
            return false;
    return true;
}

void QXmlStreamReaderPrivate::putString(const QString &s, int from)
{
    putStack.reserve(s.size());
    for (int i = s.size()-1; i >= from; --i)
        putStack.rawPush() = s.at(i).unicode();
}

void QXmlStreamReaderPrivate::putStringLiteral(const QString &s)
{
    putStack.reserve(s.size());
    for (int i = s.size()-1; i >= 0; --i)
        putStack.rawPush() = ((LETTER << 16) | s.at(i).unicode());
}

void QXmlStreamReaderPrivate::putReplacement(const QString &s)
{
    putStack.reserve(s.size());
    for (int i = s.size()-1; i >= 0; --i) {
        ushort c = s.at(i).unicode();
        if (c == '\n' || c == '\r')
            putStack.rawPush() = ((LETTER << 16) | c);
        else
            putStack.rawPush() = c;
    }
}
void QXmlStreamReaderPrivate::putReplacementInAttributeValue(const QString &s)
{
    putStack.reserve(s.size());
    for (int i = s.size()-1; i >= 0; --i) {
        ushort c = s.at(i).unicode();
        if (c == '&' || c == ';')
            putStack.rawPush() = c;
        else if (c == '\n' || c == '\r')
            putStack.rawPush() = ' ';
        else
            putStack.rawPush() = ((LETTER << 16) | c);
    }
}

ushort QXmlStreamReaderPrivate::getChar_helper()
{
    const int BUFFER_SIZE = 8192;
    characterOffset += readBufferPos;
    readBufferPos = 0;
    readBuffer.resize(0);
#ifndef QT_NO_TEXTCODEC
    if (decoder)
        nbytesread = 0;
#endif
    if (device) {
        rawReadBuffer.resize(BUFFER_SIZE);
        nbytesread += device->read(rawReadBuffer.data() + nbytesread, BUFFER_SIZE - nbytesread);
    } else {
        if (nbytesread)
            rawReadBuffer += dataBuffer;
        else
            rawReadBuffer = dataBuffer;
        nbytesread = rawReadBuffer.size();
        dataBuffer.clear();
    }
    if (!nbytesread) {
        atEnd = true;
        return 0;
    }

#ifndef QT_NO_TEXTCODEC
    if (!decoder) {
        if (nbytesread < 4) { // the 4 is to cover 0xef 0xbb 0xbf plus
                              // one extra for the utf8 codec
            atEnd = true;
            return 0;
        }
        int mib = 106; // UTF-8
        // look for byte order mark
        uchar ch1 = rawReadBuffer.at(0);
        uchar ch2 = rawReadBuffer.at(1);

        if (ch1 == 0xfe && ch2 == 0xff || ch1 == 0xff && ch2 == 0xfe)
            mib = 1015; // UTF-16 with byte order mark
        else if (ch1 == 0x3c && ch2 == 0x00)
            mib = 1014; // UTF-16LE
        else if (ch1 == 0x00 && ch2 == 0x3c)
            mib = 1013; // UTF-16BE
        codec = QTextCodec::codecForMib(mib);
        Q_ASSERT(codec);
        decoder = codec->makeDecoder();
    }

    decoder->toUnicode(&readBuffer, rawReadBuffer.data(), nbytesread);

    if(lockEncoding && decoder->hasFailure()) {
        raiseWellFormedError(QXmlStream::tr("Encountered incorrectly encoded content."));
        readBuffer.clear();
        return 0;
    }
#else
    readBuffer = QString::fromLatin1(rawReadBuffer.data(), nbytesread);
#endif // QT_NO_TEXTCODEC

    readBuffer.reserve(1); // keep capacity when calling resize() next time

    if (readBufferPos < readBuffer.size()) {
        ushort c = readBuffer.at(readBufferPos++).unicode();
        return c;
    }

    atEnd = true;
    return 0;
}

QStringRef QXmlStreamReaderPrivate::namespaceForPrefix(const QStringRef &prefix)
{
     for (int j = namespaceDeclarations.size() - 1; j >= 0; --j) {
         const NamespaceDeclaration &namespaceDeclaration = namespaceDeclarations.at(j);
         if (namespaceDeclaration.prefix == prefix) {
             return namespaceDeclaration.namespaceUri;
         }
     }

#if 1
     if (namespaceProcessing && !prefix.isEmpty())
         raiseWellFormedError(QXmlStream::tr("Namespace prefix '%1' not declared").arg(prefix.toString()));
#endif

     return QStringRef();
}