/* Test mpq_mul_2exp and mpq_div_2exp.

Copyright 2000, 2001 Free Software Foundation, Inc.

This file is part of the GNU MP Library.

The GNU MP 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 MP 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 MP Library.  If not, see http://www.gnu.org/licenses/.  */

#include <stdio.h>
#include <stdlib.h>
#include "gmp.h"
#include "gmp-impl.h"
#include "tests.h"


struct pair_t {
  const char     *num;
  const char     *den;
};

int
main (void)
{
  static const struct {
    struct pair_t  left;
    unsigned long  n;
    struct pair_t  right;

  } data[] = {
    { {"0","1"}, 0, {"0","1"} },
    { {"0","1"}, 1, {"0","1"} },
    { {"0","1"}, 2, {"0","1"} },

    { {"1","1"}, 0, {"1","1"} },
    { {"1","1"}, 1, {"2","1"} },
    { {"1","1"}, 2, {"4","1"} },
    { {"1","1"}, 3, {"8","1"} },

    { {"1","1"}, 31, {"0x80000000","1"} },
    { {"1","1"}, 32, {"0x100000000","1"} },
    { {"1","1"}, 33, {"0x200000000","1"} },
    { {"1","1"}, 63, {"0x8000000000000000","1"} },
    { {"1","1"}, 64, {"0x10000000000000000","1"} },
    { {"1","1"}, 65, {"0x20000000000000000","1"} },
    { {"1","1"}, 95, {"0x800000000000000000000000","1"} },
    { {"1","1"}, 96, {"0x1000000000000000000000000","1"} },
    { {"1","1"}, 97, {"0x2000000000000000000000000","1"} },
    { {"1","1"}, 127, {"0x80000000000000000000000000000000","1"} },
    { {"1","1"}, 128, {"0x100000000000000000000000000000000","1"} },
    { {"1","1"}, 129, {"0x200000000000000000000000000000000","1"} },

    { {"1","2"}, 31, {"0x40000000","1"} },
    { {"1","2"}, 32, {"0x80000000","1"} },
    { {"1","2"}, 33, {"0x100000000","1"} },
    { {"1","2"}, 63, {"0x4000000000000000","1"} },
    { {"1","2"}, 64, {"0x8000000000000000","1"} },
    { {"1","2"}, 65, {"0x10000000000000000","1"} },
    { {"1","2"}, 95, {"0x400000000000000000000000","1"} },
    { {"1","2"}, 96, {"0x800000000000000000000000","1"} },
    { {"1","2"}, 97, {"0x1000000000000000000000000","1"} },
    { {"1","2"}, 127, {"0x40000000000000000000000000000000","1"} },
    { {"1","2"}, 128, {"0x80000000000000000000000000000000","1"} },
    { {"1","2"}, 129, {"0x100000000000000000000000000000000","1"} },

    { {"1","0x80000000"}, 30, {"1","2"} },
    { {"1","0x80000000"}, 31, {"1","1"} },
    { {"1","0x80000000"}, 32, {"2","1"} },
    { {"1","0x80000000"}, 33, {"4","1"} },
    { {"1","0x80000000"}, 62, {"0x80000000","1"} },
    { {"1","0x80000000"}, 63, {"0x100000000","1"} },
    { {"1","0x80000000"}, 64, {"0x200000000","1"} },
    { {"1","0x80000000"}, 94, {"0x8000000000000000","1"} },
    { {"1","0x80000000"}, 95, {"0x10000000000000000","1"} },
    { {"1","0x80000000"}, 96, {"0x20000000000000000","1"} },
    { {"1","0x80000000"}, 126, {"0x800000000000000000000000","1"} },
    { {"1","0x80000000"}, 127, {"0x1000000000000000000000000","1"} },
    { {"1","0x80000000"}, 128, {"0x2000000000000000000000000","1"} },

    { {"1","0x100000000"}, 1, {"1","0x80000000"} },
    { {"1","0x100000000"}, 2, {"1","0x40000000"} },
    { {"1","0x100000000"}, 3, {"1","0x20000000"} },

    { {"1","0x10000000000000000"}, 1, {"1","0x8000000000000000"} },
    { {"1","0x10000000000000000"}, 2, {"1","0x4000000000000000"} },
    { {"1","0x10000000000000000"}, 3, {"1","0x2000000000000000"} },
  };

  void (*fun) _PROTO ((mpq_ptr, mpq_srcptr, unsigned long));
  const struct pair_t  *p_start, *p_want;
  const char  *name;
  mpq_t    sep, got, want;
  mpq_ptr  q;
  int      i, muldiv, sign, overlap;

  tests_start ();

  mpq_init (sep);
  mpq_init (got);
  mpq_init (want);

  for (i = 0; i < numberof (data); i++)
    {
      for (muldiv = 0; muldiv < 2; muldiv++)
        {
          if (muldiv == 0)
            {
              fun = mpq_mul_2exp;
              name = "mpq_mul_2exp";
              p_start = &data[i].left;
              p_want = &data[i].right;
            }
          else
            {
              fun = mpq_div_2exp;
              name = "mpq_div_2exp";
              p_start = &data[i].right;
              p_want = &data[i].left;
            }

          for (sign = 0; sign <= 1; sign++)
            {
              mpz_set_str_or_abort (mpq_numref(want), p_want->num, 0);
              mpz_set_str_or_abort (mpq_denref(want), p_want->den, 0);
              if (sign)
                mpq_neg (want, want);

              for (overlap = 0; overlap <= 1; overlap++)
                {
                  q = overlap ? got : sep;

                  /* initial garbage in "got" */
                  mpq_set_ui (got, 123L, 456L);

                  mpz_set_str_or_abort (mpq_numref(q), p_start->num, 0);
                  mpz_set_str_or_abort (mpq_denref(q), p_start->den, 0);
                  if (sign)
                    mpq_neg (q, q);

                  (*fun) (got, q, data[i].n);
                  MPQ_CHECK_FORMAT (got);

                  if (! mpq_equal (got, want))
                    {
                      printf ("%s wrong at data[%d], sign %d, overlap %d\n",
                              name, i, sign, overlap);
                      printf ("   num \"%s\"\n", p_start->num);
                      printf ("   den \"%s\"\n", p_start->den);
                      printf ("   n   %lu\n", data[i].n);

                      printf ("   got  ");
                      mpq_out_str (stdout, 16, got);
                      printf (" (hex)\n");

                      printf ("   want ");
                      mpq_out_str (stdout, 16, want);
                      printf (" (hex)\n");

                      abort ();
                    }
                }
            }
        }
    }

  mpq_clear (sep);
  mpq_clear (got);
  mpq_clear (want);

  tests_end ();
  exit (0);
}