x0::Buffer ExampleFilter::process(const x0::BufferRef& input)
{
x0::Buffer result;
switch (mode_)
{
case ExampleFilter::LOWER:
for (auto i = input.begin(), e = input.end(); i != e; ++i)
result.push_back(static_cast<char>(std::tolower(*i)));
break;
case ExampleFilter::UPPER:
for (auto i = input.begin(), e = input.end(); i != e; ++i)
result.push_back(static_cast<char>(std::toupper(*i)));
break;
case ExampleFilter::IDENTITY:
default:
result.push_back(input);
}
return result;
}
