C++ CharPointerType::getAndAdvance方法代码示例

//==============================================================================
StringPairArray parsePreprocessorDefs (const String& text)
{
    StringPairArray result;
    String::CharPointerType s (text.getCharPointer());

    while (! s.isEmpty())
    {
        String token, value;
        s = s.findEndOfWhitespace();

        while ((! s.isEmpty()) && *s != '=' && ! s.isWhitespace())
            token << s.getAndAdvance();

        s = s.findEndOfWhitespace();

        if (*s == '=')
        {
            ++s;

            s = s.findEndOfWhitespace();

            while ((! s.isEmpty()) && ! s.isWhitespace())
            {
                if (*s == ',')
                {
                    ++s;
                    break;
                }

                if (*s == '\\' && (s[1] == ' ' || s[1] == ','))
                    ++s;

                value << s.getAndAdvance();
            }
        }

        if (token.isNotEmpty())
            result.set (token, value);
    }

    return result;
}

    static void createLines (Array <CodeDocumentLine*>& newLines, const String& text)
    {
        String::CharPointerType t (text.getCharPointer());
        int charNumInFile = 0;
        bool finished = false;

        while (! (finished || t.isEmpty()))
        {
            String::CharPointerType startOfLine (t);
            int startOfLineInFile = charNumInFile;
            int lineLength = 0;
            int numNewLineChars = 0;

            for (;;)
            {
                const juce_wchar c = t.getAndAdvance();

                if (c == 0)
                {
                    finished = true;
                    break;
                }

                ++charNumInFile;
                ++lineLength;

                if (c == '\r')
                {
                    ++numNewLineChars;

                    if (*t == '\n')
                    {
                        ++t;
                        ++charNumInFile;
                        ++lineLength;
                        ++numNewLineChars;
                    }

                    break;
                }

                if (c == '\n')
                {
                    ++numNewLineChars;
                    break;
                }
            }

            newLines.add (new CodeDocumentLine (startOfLine, lineLength,
                                                numNewLineChars, startOfLineInFile));
        }

        jassert (charNumInFile == text.length());
    }

    static int findLongestCommonSubstring (String::CharPointerType a, const int lenA,
                                           const String::CharPointerType b, const int lenB,
                                           int& indexInA, int& indexInB)
    {
        if (lenA == 0 || lenB == 0)
            return 0;

        HeapBlock<int> lines;
        lines.calloc (2 + 2 * (size_t) lenB);

        int* l0 = lines;
        int* l1 = l0 + lenB + 1;

        int loopsWithoutImprovement = 0;
        int bestLength = 0;
        indexInA = indexInB = 0;

        for (int i = 0; i < lenA; ++i)
        {
            const juce_wchar ca = a.getAndAdvance();
            String::CharPointerType b2 (b);

            for (int j = 0; j < lenB; ++j)
            {
                if (ca != b2.getAndAdvance())
                {
                    l1[j + 1] = 0;
                }
                else
                {
                    const int len = l0[j] + 1;
                    l1[j + 1] = len;

                    if (len > bestLength)
                    {
                        loopsWithoutImprovement = 0;
                        bestLength = len;
                        indexInA = i;
                        indexInB = j;
                    }
                }
            }

            if (++loopsWithoutImprovement > 100)
                break;

            std::swap (l0, l1);
        }

        indexInA -= bestLength - 1;
        indexInB -= bestLength - 1;
        return bestLength;
    }

    static Result parseObjectOrArray (String::CharPointerType t, var& result)
    {
        t = t.findEndOfWhitespace();

        switch (t.getAndAdvance())
        {
            case 0:      result = var::null; return Result::ok();
            case '{':    return parseObject (t, result);
            case '[':    return parseArray  (t, result);
        }

        return createFail ("Expected '{' or '['", &t);
    }

    static int findLongestCommonSubstring (String::CharPointerType a, const int lenA, int& indexInA,
                                           String::CharPointerType b, const int lenB, int& indexInB,
                                           const size_t scratchSpace, int* const lines) noexcept
    {
        zeromem (lines, scratchSpace);

        int* l0 = lines;
        int* l1 = l0 + lenB + 1;

        int loopsWithoutImprovement = 0;
        int bestLength = 0;

        for (int i = 0; i < lenA; ++i)
        {
            const juce_wchar ca = a.getAndAdvance();
            String::CharPointerType b2 (b);

            for (int j = 0; j < lenB; ++j)
            {
                if (ca != b2.getAndAdvance())
                {
                    l1[j + 1] = 0;
                }
                else
                {
                    const int len = l0[j] + 1;
                    l1[j + 1] = len;

                    if (len > bestLength)
                    {
                        loopsWithoutImprovement = 0;
                        bestLength = len;
                        indexInA = i;
                        indexInB = j;
                    }
                }
            }

            if (++loopsWithoutImprovement > 100)
                break;

            std::swap (l0, l1);
        }

        indexInA -= bestLength - 1;
        indexInB -= bestLength - 1;
        return bestLength;
    }

MD5::MD5 (const String& text)
{
    ProcessContext context;
    String::CharPointerType t (text.getCharPointer());

    while (! t.isEmpty())
    {
        // force the string into integer-sized unicode characters, to try to make it
        // get the same results on all platforms + compilers.
        uint32 unicodeChar = ByteOrder::swapIfBigEndian ((uint32) t.getAndAdvance());

        context.processBlock (&unicodeChar, sizeof (unicodeChar));
    }

    context.finish (result);
}

    int indexToColumn (int index, const String& line, int spacesPerTab) const noexcept
    {
        jassert (index <= line.length());

        String::CharPointerType t (line.getCharPointer());
        int col = 0;
        for (int i = 0; i < index; ++i)
        {
            if (t.getAndAdvance() != '\t')
                ++col;
            else
                col += spacesPerTab - (col % spacesPerTab);
        }

        return col;
    }

    void updateLength() noexcept
    {
        lineLength = 0;
        lineLengthWithoutNewLines = 0;

        for (String::CharPointerType t (line.getCharPointer());;)
        {
            const juce_wchar c = t.getAndAdvance();

            if (c == 0)
                break;

            ++lineLength;

            if (c != '\n' && c != '\r')
                lineLengthWithoutNewLines = lineLength;
        }
    }

void GlyphArrangement::addCurtailedLineOfText (const Font& font,
                                               const String& text,
                                               const float xOffset,
                                               const float yOffset,
                                               const float maxWidthPixels,
                                               const bool useEllipsis)
{
    if (text.isNotEmpty())
    {
        Array <int> newGlyphs;
        Array <float> xOffsets;
        font.getGlyphPositions (text, newGlyphs, xOffsets);
        const int textLen = newGlyphs.size();
        glyphs.ensureStorageAllocated (glyphs.size() + textLen);

        String::CharPointerType t (text.getCharPointer());

        for (int i = 0; i < textLen; ++i)
        {
            const float thisX = xOffsets.getUnchecked (i);
            const float nextX = xOffsets.getUnchecked (i + 1);

            if (nextX > maxWidthPixels + 1.0f)
            {
                // curtail the string if it's too wide..
                if (useEllipsis && textLen > 3 && glyphs.size() >= 3)
                    insertEllipsis (font, xOffset + maxWidthPixels, 0, glyphs.size());

                break;
            }
            else
            {
                const bool isWhitespace = t.isWhitespace();

                glyphs.add (new PositionedGlyph (font, t.getAndAdvance(),
                                                 newGlyphs.getUnchecked(i),
                                                 xOffset + thisX, yOffset,
                                                 nextX - thisX, isWhitespace));
            }
        }
    }
}

int StringArray::addLines (const String& sourceText)
{
    int numLines = 0;
    String::CharPointerType text (sourceText.getCharPointer());
    bool finished = text.isEmpty();

    while (! finished)
    {
        String::CharPointerType startOfLine (text);
        size_t numChars = 0;

        for (;;)
        {
            const juce_wchar c = text.getAndAdvance();

            if (c == 0)
            {
                finished = true;
                break;
            }

            if (c == '\n')
                break;

            if (c == '\r')
            {
                if (*text == '\n')
                    ++text;

                break;
            }

            ++numChars;
        }

        add (String (startOfLine, numChars));
        ++numLines;
    }

    return numLines;
}

int CodeEditorComponent::columnToIndex (int lineNum, int column) const noexcept
{
    String::CharPointerType t (document.getLine (lineNum).getCharPointer());

    int i = 0, col = 0;

    while (! t.isEmpty())
    {
        if (t.getAndAdvance() != '\t')
            ++col;
        else
            col += getTabSize() - (col % getTabSize());

        if (col > column)
            break;

        ++i;
    }

    return i;
}

    void getGlyphPositions (const String& text, Array<int>& glyphs, Array<float>& xOffsets) override
    {
        JNIEnv* env = getEnv();
        const int numChars = text.length();
        jfloatArray widths = env->NewFloatArray (numChars);

        const int numDone = paint.callIntMethod (Paint.getTextWidths, javaString (text).get(), widths);

        HeapBlock<jfloat> localWidths (numDone);
        env->GetFloatArrayRegion (widths, 0, numDone, localWidths);
        env->DeleteLocalRef (widths);

        String::CharPointerType s (text.getCharPointer());

        xOffsets.add (0);

        float x = 0;
        for (int i = 0; i < numDone; ++i)
        {
            glyphs.add ((int) s.getAndAdvance());
            x += localWidths[i];
            xOffsets.add (x * referenceFontToUnits);
        }
    }

void BinaryResources::loadFromCpp (const File& cppFileLocation, const String& cppFile)
{
    StringArray cpp;
    cpp.addLines (cppFile);

    clear();

    for (int i = 0; i < cpp.size(); ++i)
    {
        if (cpp[i].contains ("JUCER_RESOURCE:"))
        {
            StringArray tokens;
            tokens.addTokens (cpp[i].fromFirstOccurrenceOf (":", false, false), ",", "\"'");
            tokens.trim();
            tokens.removeEmptyStrings();

            const String resourceName (tokens[0]);
            const int resourceSize = tokens[1].getIntValue();
            const String originalFileName (cppFileLocation.getSiblingFile (tokens[2].unquoted()).getFullPathName());

            jassert (resourceName.isNotEmpty() && resourceSize > 0);

            if (resourceName.isNotEmpty() && resourceSize > 0)
            {
                const int firstLine = i;

                while (i < cpp.size())
                    if (cpp [i++].contains ("}"))
                        break;

                const String dataString (cpp.joinIntoString (" ", firstLine, i - firstLine)
                                            .fromFirstOccurrenceOf ("{", false, false));

                MemoryOutputStream out;
                String::CharPointerType t (dataString.getCharPointer());
                int n = 0;

                while (! t.isEmpty())
                {
                    const juce_wchar c = t.getAndAdvance();

                    if (c >= '0' && c <= '9')
                        n = n * 10 + (c - '0');
                    else if (c == ',')
                    {
                        out.writeByte ((char) n);
                        n = 0;
                    }
                    else if (c == '}')
                        break;
                }

                jassert (resourceSize < (int) out.getDataSize() && resourceSize > (int) out.getDataSize() - 2);

                MemoryBlock mb (out.getData(), out.getDataSize());
                mb.setSize ((size_t) resourceSize);

                add (resourceName, originalFileName, mb);
            }
        }
    }
}

    //==============================================================================
    void parsePathString (Path& path, const String& pathString) const
    {
        String::CharPointerType d (pathString.getCharPointer().findEndOfWhitespace());

        Point<float> subpathStart, last, last2, p1, p2, p3;
        juce_wchar lastCommandChar = 0;
        bool isRelative = true;
        bool carryOn = true;

        const CharPointer_ASCII validCommandChars ("MmLlHhVvCcSsQqTtAaZz");

        while (! d.isEmpty())
        {
            if (validCommandChars.indexOf (*d) >= 0)
            {
                lastCommandChar = d.getAndAdvance();
                isRelative = (lastCommandChar >= 'a' && lastCommandChar <= 'z');
            }

            switch (lastCommandChar)
            {
            case 'M':
            case 'm':
            case 'L':
            case 'l':
                if (parseCoordsOrSkip (d, p1, false))
                {
                    if (isRelative)
                        p1 += last;

                    if (lastCommandChar == 'M' || lastCommandChar == 'm')
                    {
                        subpathStart = p1;
                        path.startNewSubPath (p1);
                        lastCommandChar = 'l';
                    }
                    else
                        path.lineTo (p1);

                    last2 = last;
                    last = p1;
                }
                break;

            case 'H':
            case 'h':
                if (parseCoord (d, p1.x, false, true))
                {
                    if (isRelative)
                        p1.x += last.x;

                    path.lineTo (p1.x, last.y);

                    last2.x = last.x;
                    last.x = p1.x;
                }
                else
                {
                    ++d;
                }
                break;

            case 'V':
            case 'v':
                if (parseCoord (d, p1.y, false, false))
                {
                    if (isRelative)
                        p1.y += last.y;

                    path.lineTo (last.x, p1.y);

                    last2.y = last.y;
                    last.y = p1.y;
                }
                else
                {
                    ++d;
                }
                break;

            case 'C':
            case 'c':
                if (parseCoordsOrSkip (d, p1, false)
                     && parseCoordsOrSkip (d, p2, false)
                     && parseCoordsOrSkip (d, p3, false))
                {
                    if (isRelative)
                    {
                        p1 += last;
                        p2 += last;
                        p3 += last;
                    }

                    path.cubicTo (p1, p2, p3);

                    last2 = p2;
                    last = p3;
                }
                break;
//.........这里部分代码省略.........

bool OutputStream::writeText (const String& text, const bool asUTF16,
                              const bool writeUTF16ByteOrderMark)
{
    if (asUTF16)
    {
        if (writeUTF16ByteOrderMark)
            write ("\x0ff\x0fe", 2);

        String::CharPointerType src (text.getCharPointer());
        bool lastCharWasReturn = false;

        for (;;)
        {
            const beast_wchar c = src.getAndAdvance();

            if (c == 0)
                break;

            if (c == '\n' && ! lastCharWasReturn)
                writeShort ((short) '\r');

            lastCharWasReturn = (c == L'\r');

            if (! writeShort ((short) c))
                return false;
        }
    }
    else
    {
        const char* src = text.toUTF8();
        const char* t = src;

        for (;;)
        {
            if (*t == '\n')
            {
                if (t > src)
                    if (! write (src, (int) (t - src)))
                        return false;

                if (! write ("\r\n", 2))
                    return false;

                src = t + 1;
            }
            else if (*t == '\r')
            {
                if (t[1] == '\n')
                    ++t;
            }
            else if (*t == 0)
            {
                if (t > src)
                    if (! write (src, (int) (t - src)))
                        return false;

                break;
            }

            ++t;
        }
    }

    return true;
}