Function formatReadable

src/Common/formatReadable.cpp:18–35

I wanted to make this ALWAYS_INLINE to prevent flappy performance tests, but GCC complains it may not be inlined.

// I wanted to make this ALWAYS_INLINE to prevent flappy performance tests,
// but GCC complains it may not be inlined.
static void formatReadable(double size, DB::WriteBuffer & out,
    int precision, const char ** units, size_t units_size, double delimiter)
{
    size_t i = 0;
    for (; i + 1 < units_size && fabs(size) >= delimiter; ++i)
        size /= delimiter;

    DB::DoubleConverter<false>::BufferType buffer;
    double_conversion::StringBuilder builder{buffer, sizeof(buffer)};

    const auto result = DB::DoubleConverter<false>::instance().ToFixed(size, precision, &builder);

    if (!result)
        throw DB::Exception("Cannot print float or double number", DB::ErrorCodes::CANNOT_PRINT_FLOAT_OR_DOUBLE_NUMBER);

    out.write(buffer, builder.position());
    writeCString(units[i], out);
}


void formatReadableSizeWithBinarySuffix(double value, DB::WriteBuffer & out, int precision)