text: #include <mruby.h>
  
  #ifdef MRB_DISABLE_STDIO
  # error print conflicts 'MRB_DISABLE_STDIO' configuration in your 'build_config.rb'
  #endif
  
  #include <mruby/string.h>
  #include <string.h>
  #include <stdlib.h>
  #if defined(_WIN32)
  # include <windows.h>
  # include <io.h>
  #ifdef _MSC_VER
  # define isatty(x) _isatty(x)
  # define fileno(x) _fileno(x)
  #endif
  #endif
  
  static void
  printstr(mrb_state *mrb, mrb_value obj)
  {
    if (mrb_string_p(obj)) {
  #if defined(_WIN32)
      if (isatty(fileno(stdout))) {
        DWORD written;
        int mlen = (int)RSTRING_LEN(obj);
        char* utf8 = RSTRING_PTR(obj);
        int wlen = MultiByteToWideChar(CP_UTF8, 0, utf8, mlen, NULL, 0);
        wchar_t* utf16 = (wchar_t*)mrb_malloc(mrb, (wlen+1) * sizeof(wchar_t));
        if (MultiByteToWideChar(CP_UTF8, 0, utf8, mlen, utf16, wlen) > 0) {
          utf16[wlen] = 0;
          WriteConsoleW(GetStdHandle(STD_OUTPUT_HANDLE),
            utf16, wlen, &written, NULL);
        }
        mrb_free(mrb, utf16);
      } else
  #endif
        fwrite(RSTRING_PTR(obj), RSTRING_LEN(obj), 1, stdout);
      fflush(stdout);
    }
  }
  
  /* 15.3.1.2.9  */
  /* 15.3.1.3.34 */
  mrb_value
  mrb_printstr(mrb_state *mrb, mrb_value self)
  {
    mrb_value argv;
  
    mrb_get_args(mrb, "o", &argv);
    printstr(mrb, argv);
  
    return argv;
  }
  
  void
  mrb_mruby_print_gem_init(mrb_state* mrb)
  {
    struct RClass *krn;
    krn = mrb->kernel_module;
    mrb_define_method(mrb, krn, "__printstr__", mrb_printstr, MRB_ARGS_REQ(1));
  }
  
  void
  mrb_mruby_print_gem_final(mrb_state* mrb)
  {
  }
  