#include "kern/print.hpp"

#include <string_view>

namespace teachos
{
  namespace
  {
    print_handler * current_print_handler{};
    println_handler * current_println_handler{};
    print_handler * current_print_error_handler{};
    println_handler * current_println_error_handler{};
  }  // namespace

  auto print(std::string_view text) -> void
  {
    if (current_print_handler)
    {
      current_print_handler(text);
    }
  }

  auto println(std::string_view text) -> void
  {
    if (current_println_handler)
    {
      current_println_handler(text);
    }
  }

  auto print_error(std::string_view text) -> void
  {
    if (current_print_error_handler)
    {
      current_print_error_handler(text);
    }
  }

  auto println_error(std::string_view text) -> void
  {
    if (current_println_error_handler)
    {
      current_println_error_handler(text);
    }
  }

  auto set_print_handler(print_handler handler) -> print_handler *
  {
    auto old = current_print_handler;
    current_print_handler = handler;
    return old;
  }

  auto set_println_handler(println_handler handler) -> print_handler *
  {
    auto old = current_println_handler;
    current_println_handler = handler;
    return old;
  }

  auto set_print_error_handler(print_handler handler) -> print_handler *
  {
    auto old = current_print_error_handler;
    current_print_error_handler = handler;
    return old;
  }

  auto set_println_error_handler(println_handler handler) -> print_handler *
  {
    auto old = current_println_error_handler;
    current_println_error_handler = handler;
    return old;
  }

}  // namespace teachos