void largeConsoleRead()

in src/agent/LargeConsoleRead.cc [34:71]

• 37 lines of code
• 10 McCabe index (conditional complexity)

void largeConsoleRead(LargeConsoleReadBuffer &out,
                      Win32ConsoleBuffer &buffer,
                      const SmallRect &readArea,
                      WORD attributesMask) {
    ASSERT(readArea.Left >= 0 &&
           readArea.Top >= 0 &&
           readArea.Right >= readArea.Left &&
           readArea.Bottom >= readArea.Top &&
           readArea.width() <= MAX_CONSOLE_WIDTH);
    const size_t count = readArea.width() * readArea.height();
    if (out.m_data.size() < count) {
        out.m_data.resize(count);
    }
    out.m_rect = readArea;
    out.m_rectWidth = readArea.width();

    static const bool useLargeReads = isAtLeastWindows8();
    if (useLargeReads) {
        buffer.read(readArea, out.m_data.data());
    } else {
        const int maxReadLines = std::max(1, MAX_CONSOLE_WIDTH / readArea.width());
        int curLine = readArea.Top;
        while (curLine <= readArea.Bottom) {
            const SmallRect subReadArea(
                readArea.Left,
                curLine,
                readArea.width(),
                std::min(maxReadLines, readArea.Bottom + 1 - curLine));
            buffer.read(subReadArea, out.lineDataMut(curLine));
            curLine = subReadArea.Bottom + 1;
        }
    }
    if (attributesMask != static_cast<WORD>(~0)) {
        for (size_t i = 0; i < count; ++i) {
            out.m_data[i].Attributes &= attributesMask;
        }
    }
}