tests/tprintf.c

/* tprintf.c -- test file for mpfr_printf and mpfr_vprintf

Copyright 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
Contributed by the AriC and Caramel projects, INRIA.

This file is part of the GNU MPFR Library.

The GNU MPFR Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or (at your
option) any later version.

The GNU MPFR Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
License for more details.

You should have received a copy of the GNU Lesser General Public License
along with the GNU MPFR Library; see the file COPYING.LESSER.  If not, see
http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */

#if HAVE_STDARG
#include <stdarg.h>

#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>

#include "mpfr-intmax.h"
#include "mpfr-test.h"
#define STDOUT_FILENO 1

#if MPFR_VERSION >= MPFR_VERSION_NUM(2,4,0)

#define QUOTE(X) NAME(X)
#define NAME(X) #X

/* unlike other tests, we print out errors to stderr because stdout might be
   redirected */
#define check_length(num_test, var, value, var_spec)                    \
  if ((var) != (value))                                                 \
    {                                                                   \
      fprintf (stderr, "Error in test #%d: mpfr_printf printed %"       \
               QUOTE(var_spec)" characters instead of %d\n",            \
               (num_test), (var), (value));                             \
      exit (1);                                                         \
    }

#define check_length_with_cmp(num_test, var, value, cmp, var_spec)      \
  if (cmp != 0)                                                         \
    {                                                                   \
      mpfr_fprintf (stderr, "Error in test #%d, mpfr_printf printed %"  \
                    QUOTE(var_spec)" characters instead of %d\n",       \
                    (num_test), (var), (value));                        \
      exit (1);                                                         \
    }

/* limit for random precision in random() */
const int prec_max_printf = 5000;
/* boolean: is stdout redirected to a file ? */
int stdout_redirect;

static void
check (const char *fmt, mpfr_t x)
{
  if (mpfr_printf (fmt, x) == -1)
    {
      fprintf (stderr, "Error in mpfr_printf(\"%s\", ...)\n", fmt);

      exit (1);
    }
  putchar ('\n');
}

static void
check_vprintf (const char *fmt, ...)
{
  va_list ap;

  va_start (ap, fmt);
  if (mpfr_vprintf (fmt, ap) == -1)
    {
      fprintf (stderr, "Error in mpfr_vprintf(\"%s\", ...)\n", fmt);

      va_end (ap);
      exit (1);
    }
  putchar ('\n');
  va_end (ap);
}

static void
check_vprintf_failure (const char *fmt, ...)
{
  va_list ap;

  va_start (ap, fmt);
  if (mpfr_vprintf (fmt, ap) != -1)
   {
      putchar ('\n');
      fprintf (stderr, "Error in mpfr_vprintf(\"%s\", ...)\n", fmt);

      va_end (ap);
      exit (1);
    }
  putchar ('\n');
  va_end (ap);
}

static void
check_invalid_format (void)
{
  int i = 0;

  /* format in disorder */
  check_vprintf_failure ("blah %l2.1d blah", i);
  check_vprintf_failure ("blah %2.1#d blah", i);

  /* incomplete format */
  check_vprintf_failure ("%", i);
  check_vprintf_failure ("% (missing conversion specifier)", i);
  check_vprintf_failure ("missing conversion specifier %h", i);
  check_vprintf_failure ("this should fail %.l because of missing conversion specifier "
                         "(or doubling %%)", i);
  check_vprintf_failure ("%L", i);
  check_vprintf_failure ("%hh. ", i);
  check_vprintf_failure ("blah %j.");
  check_vprintf_failure ("%ll blah");
  check_vprintf_failure ("blah%t blah");
  check_vprintf_failure ("%z ");
  check_vprintf_failure ("%F (missing conversion specifier)");
  check_vprintf_failure ("%Q (missing conversion specifier)");
  check_vprintf_failure ("%M (missing conversion specifier)");
  check_vprintf_failure ("%N (missing conversion specifier)");
  check_vprintf_failure ("%Z (missing conversion specifier)");
  check_vprintf_failure ("%R (missing conversion specifier)");
  check_vprintf_failure ("%R");
  check_vprintf_failure ("%P (missing conversion specifier)");

  /* conversion specifier with wrong length specifier */
  check_vprintf_failure ("%ha", i);
  check_vprintf_failure ("%hhe", i);
  check_vprintf_failure ("%jf", i);
  check_vprintf_failure ("%lg", i);
  check_vprintf_failure ("%tA", i);
  check_vprintf_failure ("%zE", i);
  check_vprintf_failure ("%Ld", i);
  check_vprintf_failure ("%Qf", i);
  check_vprintf_failure ("%MG", i);
  check_vprintf_failure ("%Na", i);
  check_vprintf_failure ("%ZE", i);
  check_vprintf_failure ("%PG", i);
  check_vprintf_failure ("%Fu", i);
  check_vprintf_failure ("%Rx", i);
}

static void
check_long_string (void)
{
  /* this test is VERY expensive both in time (~1 min on core2 @ 2.40GHz) and
     in memory (~2.5 GB) */
  mpfr_t x;

  mpfr_init2 (x, INT_MAX);

  mpfr_set_ui (x, 1, MPFR_RNDN);
  mpfr_nextabove (x);

  check_vprintf_failure ("%Rb", x);
  check_vprintf_failure ("%RA %RA %Ra %Ra", x, x, x, x);

  mpfr_clear (x);
}

static void
check_special (void)
{
  mpfr_t x;

  mpfr_init (x);

  mpfr_set_inf (x, 1);
  check ("%Ra", x);
  check ("%Rb", x);
  check ("%Re", x);
  check ("%Rf", x);
  check ("%Rg", x);
  check_vprintf ("%Ra", x);
  check_vprintf ("%Rb", x);
  check_vprintf ("%Re", x);
  check_vprintf ("%Rf", x);
  check_vprintf ("%Rg", x);

  mpfr_set_inf (x, -1);
  check ("%Ra", x);
  check ("%Rb", x);
  check ("%Re", x);
  check ("%Rf", x);
  check ("%Rg", x);
  check_vprintf ("%Ra", x);
  check_vprintf ("%Rb", x);
  check_vprintf ("%Re", x);
  check_vprintf ("%Rf", x);
  check_vprintf ("%Rg", x);

  mpfr_set_nan (x);
  check ("%Ra", x);
  check ("%Rb", x);
  check ("%Re", x);
  check ("%Rf", x);
  check ("%Rg", x);
  check_vprintf ("%Ra", x);
  check_vprintf ("%Rb", x);
  check_vprintf ("%Re", x);
  check_vprintf ("%Rf", x);
  check_vprintf ("%Rg", x);

  mpfr_clear (x);
}

static void
check_mixed (void)
{
  int ch = 'a';
#ifndef NPRINTF_HH
  signed char sch = -1;
  unsigned char uch = 1;
#endif
  short sh = -1;
  unsigned short ush = 1;
  int i = -1;
  int j = 1;
  unsigned int ui = 1;
  long lo = -1;
  unsigned long ulo = 1;
  float f = -1.25;
  double d = -1.25;
#if !defined(NPRINTF_T) || !defined(NPRINTF_L)
  long double ld = -1.25;
#endif

#ifndef NPRINTF_T
  ptrdiff_t p = 1, saved_p;
#endif
  size_t sz = 1;

  mpz_t mpz;
  mpq_t mpq;
  mpf_t mpf;
  mpfr_rnd_t rnd = MPFR_RNDN;

  mpfr_t mpfr;
  mpfr_prec_t prec;

  mpz_init (mpz);
  mpz_set_ui (mpz, ulo);
  mpq_init (mpq);
  mpq_set_si (mpq, lo, ulo);
  mpf_init (mpf);
  mpf_set_q (mpf, mpq);
  mpfr_init (mpfr);
  mpfr_set_f (mpfr, mpf, MPFR_RNDN);
  prec = mpfr_get_prec (mpfr);

  check_vprintf ("a. %Ra, b. %u, c. %lx%n", mpfr, ui, ulo, &j);
  check_length (1, j, 22, d);
  check_vprintf ("a. %c, b. %Rb, c. %u, d. %li%ln", i, mpfr, i, lo, &ulo);
  check_length (2, ulo, 36, lu);
  check_vprintf ("a. %hi, b. %*f, c. %Re%hn", ush, 3, f, mpfr, &ush);
  check_length (3, ush, 29, hu);
  check_vprintf ("a. %hi, b. %f, c. %#.2Rf%n", sh, d, mpfr, &i);
  check_length (4, i, 29, d);
  check_vprintf ("a. %R*A, b. %Fe, c. %i%zn", rnd, mpfr, mpf, sz, &sz);
  check_length (5, (unsigned long) sz, 34, lu); /* no format specifier '%zu' in C89 */
  check_vprintf ("a. %Pu, b. %c, c. %RUG, d. %Zi%Zn", prec, ch, mpfr, mpz, &mpz);
  check_length_with_cmp (6, mpz, 24, mpz_cmp_ui (mpz, 24), Zi);
  check_vprintf ("%% a. %#.0RNg, b. %Qx%Rn c. %p",
                 mpfr, mpq, &mpfr, (void *) &i);
  check_length_with_cmp (7, mpfr, 15, mpfr_cmp_ui (mpfr, 15), Rg);

#ifndef NPRINTF_T
  saved_p = p;
  check_vprintf ("%% a. %RNg, b. %Qx, c. %td%tn", mpfr, mpq, p, &p);
  if (p != 20)
    mpfr_fprintf (stderr, "Error in test 8, got '%% a. %RNg, b. %Qx, c. %td'\n", mpfr, mpq, saved_p);
  check_length (8, (long) p, 20, ld); /* no format specifier '%td' in C89 */
#endif

#ifndef NPRINTF_L
  check_vprintf ("a. %RA, b. %Lf, c. %QX%zn", mpfr, ld, mpq, &sz);
  check_length (9, (unsigned long) sz, 30, lu); /* no format specifier '%zu' in C89 */
#endif

#ifndef NPRINTF_HH
  check_vprintf ("a. %hhi, b. %Ra, c. %hhu%hhn", sch, mpfr, uch, &uch);
  check_length (10, (unsigned int) uch, 22, u); /* no format specifier '%hhu' in C89 */
#endif

#if defined(HAVE_LONG_LONG) && !defined(NPRINTF_LL)
  {
    long long llo = -1;
    unsigned long long ullo = 1;

    check_vprintf ("a. %Re, b. %llx%Qn", mpfr, ullo, &mpq);
    check_length_with_cmp (11, mpq, 16, mpq_cmp_ui (mpq, 16, 1), Qu);
    check_vprintf ("a. %lli, b. %Rf%lln", llo, mpfr, &ullo);
    check_length (12, ullo, 19, llu);
  }
#endif

#if defined(_MPFR_H_HAVE_INTMAX_T) && !defined(NPRINTF_J)
  {
    intmax_t im = -1;
    uintmax_t uim = 1;

    check_vprintf ("a. %*RA, b. %ji%Fn", 10, mpfr, im, &mpf);
    check_length_with_cmp (31, mpf, 20, mpf_cmp_ui (mpf, 20), Fg);
    check_vprintf ("a. %.*Re, b. %jx%jn", 10, mpfr, uim, &im);
    check_length (32, (long) im, 25, li); /* no format specifier "%ji" in C89 */
  }
#endif

  mpfr_clear (mpfr);
  mpf_clear (mpf);
  mpq_clear (mpq);
  mpz_clear (mpz);
}

static void
check_random (int nb_tests)
{
  int i;
  mpfr_t x;
  mpfr_rnd_t rnd;
  char flag[] =
    {
      '-',
      '+',
      ' ',
      '#',
      '0', /* no ambiguity: first zeros are flag zero*/
      '\''
    };
  char specifier[] =
    {
      'a',
      'b',
      'e',
      'f',
      'g'
    };
  mpfr_exp_t old_emin, old_emax;

  old_emin = mpfr_get_emin ();
  old_emax = mpfr_get_emax ();

  mpfr_init (x);

  for (i = 0; i < nb_tests; ++i)
    {
      int ret;
      int j, jmax;
      int spec, prec;
#define FMT_SIZE 13
      char fmt[FMT_SIZE]; /* at most something like "%-+ #0'.*R*f" */
      char *ptr = fmt;

      tests_default_random (x, 256, MPFR_EMIN_MIN, MPFR_EMAX_MAX);
      rnd = (mpfr_rnd_t) RND_RAND ();

      spec = (int) (randlimb () % 5);
      jmax = (spec == 3 || spec == 4) ? 6 : 5; /* ' flag only with %f or %g */
      /* advantage small precision */
      prec = (randlimb () % 2) ? 10 : prec_max_printf;
      prec = (int) (randlimb () % prec);
      if (spec == 3
          && (mpfr_get_exp (x) > prec_max_printf
              || mpfr_get_exp (x) < -prec_max_printf))
        /*  change style 'f' to style 'e' when number x is very large or very
            small*/
        --spec;

      *ptr++ = '%';
      for (j = 0; j < jmax; j++)
        {
          if (randlimb () % 3 == 0)
            *ptr++ = flag[j];
        }
      *ptr++ = '.';
      *ptr++ = '*';
      *ptr++ = 'R';
      *ptr++ = '*';
      *ptr++ = specifier[spec];
      *ptr = '\0';
      MPFR_ASSERTD (ptr - fmt < FMT_SIZE);

      mpfr_printf ("mpfr_printf(\"%s\", %d, %s, %Re)\n", fmt, prec,
                   mpfr_print_rnd_mode (rnd), x);
      ret = mpfr_printf (fmt, prec, rnd, x);
      if (ret == -1)
        {
          if (spec == 3
              && (MPFR_GET_EXP (x) > INT_MAX || MPFR_GET_EXP (x) < -INT_MAX))
            /* normal failure: x is too large to be output with full precision */
            {
              mpfr_printf ("too large !");
            }
          else
            {
              printf ("Error in mpfr_printf(\"%s\", %d, %s, ...)",
                      fmt, prec, mpfr_print_rnd_mode (rnd));

              if (stdout_redirect)
                {
                  if ((fflush (stdout) == EOF) || (fclose (stdout) == -1))
                    {
                      perror ("check_random");
                      exit (1);
                    }
                }
              exit (1);
            }
        }
      putchar ('\n');
    }

  mpfr_set_emin (old_emin);
  mpfr_set_emax (old_emax);

  mpfr_clear (x);
}

int
main (int argc, char *argv[])
{
  int N;

  tests_start_mpfr ();

  /* with no argument: prints to /dev/null,
     tprintf N: prints N tests to stdout */
  if (argc == 1)
    {
      N = 1000;
      stdout_redirect = 1;
      if (freopen ("/dev/null", "w", stdout) == NULL)
        {
          /* We failed to open this device, try with a dummy file */
          if (freopen ("mpfrtest.txt", "w", stdout) == NULL)
            {
              /* Output the error message to stderr since it is not
                 a message about a wrong result in MPFR. Anyway the
                 stdandard output may have changed. */
              fprintf (stderr, "Can't open /dev/null or a temporary file\n");
              exit (1);
            }
        }
    }
  else
    {
      stdout_redirect = 0;
      N = atoi (argv[1]);
    }

  check_invalid_format ();
  check_special ();
  check_mixed ();

  /* expensive tests */
  if (getenv ("MPFR_CHECK_LARGEMEM") != NULL)
    check_long_string();

  check_random (N);

  if (stdout_redirect)
    {
      if ((fflush (stdout) == EOF) || (fclose (stdout) == -1))
        perror ("main");
    }
  tests_end_mpfr ();
  return 0;
}

#else  /* MPFR_VERSION */

int
main (void)
{
  printf ("Warning! Test disabled for this MPFR version.\n");
  return 0;
}

#endif  /* MPFR_VERSION */

#else  /* HAVE_STDARG */

int
main (void)
{
  /* We have nothing to test. */
  return 77;
}

#endif  /* HAVE_STDARG */