#include <cstdio>
#ifdef _MSC_VER
#  include "vcl_msvc_warnings.h"
#endif

#define ASSERT(x, y)              \
  if (!(x))                       \
  {                               \
    std::printf("FAIL: " y "\n"); \
    fail = true;                  \
  }                               \
  static_assert(true, "")
#define ASSERT1(x, y, a)             \
  if (!(x))                          \
  {                                  \
    std::printf("FAIL: " y "\n", a); \
    fail = true;                     \
  }                                  \
  static_assert(true, "")
#define ASSERT2(x, y, a, b)             \
  if (!(x))                             \
  {                                     \
    std::printf("FAIL: " y "\n", a, b); \
    fail = true;                        \
  }                                     \
  static_assert(true, "")

int
test_cstdio_main(int argc, char * argv[])
{
  std::printf("Hello. %d %f %03x.\n", 1, 2.0f, 3);

  bool fail = false; // global status of the test suite

  // Close the standard input. All reads from
  // stdin should fail after this.
  int rc = std::fclose(stdin);
  ASSERT(rc == 0, "couldn't close standard input");

  rc = std::getchar();
  ASSERT(rc == EOF, "std::getchar() read a value from a closed stream");

  ASSERT(argc >= 2, "no file name given as the first command line argument");
  std::FILE * const fh = std::fopen(argv[1], "r");
  ASSERT1(fh, "couldn't open %s\n      (skipping file tests)", argv[1]);

  if (fh)
  {
    rc = std::getc(fh);
    ASSERT(rc == 't', "first character read was not 't'");

    rc = std::ungetc('x', fh);
    ASSERT(rc == 'x', "ungetc failed");
    if (rc == 'x')
    {
      rc = std::getc(fh);
      ASSERT2(rc == 'x', "getc returned %d, and not %d ('x') as expected", rc, 'x');
    }

    rc = std::fclose(fh);
    ASSERT(rc == 0, "failed to close file");
  }
  return fail ? 1 : 0;
}
