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#include "kapi/cio.hpp"
#include <optional>
#include <utility>
namespace teachos::cio
{
auto constinit null_device = output_device{};
auto constinit active_device = &null_device;
auto set_output_device(output_device & device) -> std::optional<output_device *>
{
if (&device == active_device)
{
return {};
}
return std::exchange(active_device, &device);
}
auto print(std::string_view text) -> void { active_device->write(text); }
auto println(std::string_view text) -> void { active_device->writeln(text); }
auto print_error(std::string_view text) -> void { active_device->write_error(text); }
auto println_error(std::string_view text) -> void { active_device->writeln_error(text); }
} // namespace teachos::cio
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