/* Test conversion and I/O using mpz_out_str and mpz_inp_str.

Copyright 1993, 1994, 1996, 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 2.1 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; see the file COPYING.LIB.  If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA. */

#include "config.h"

#include <stdio.h>
#include <stdlib.h>
#if HAVE_UNISTD_H
#include <unistd.h>		/* for unlink */
#endif

#include "gmp.h"
#include "gmp-impl.h"
#include "tests.h"

#define FILENAME  "io.tmp"

void
debug_mp (mpz_t x, int base)
{
  mpz_out_str (stdout, base, x); fputc ('\n', stdout);
}

int
main (int argc, char **argv)
{
  mpz_t  op1, op2;
  mp_size_t size;
  int i;
  int reps = 10000;
  FILE *fp;
  int base;
  gmp_randstate_ptr rands;
  mpz_t bs;
  unsigned long bsi, size_range;
  size_t nread;

  tests_start ();
  rands = RANDS;

  mpz_init (bs);

  if (argc == 2)
    reps = atoi (argv[1]);

  mpz_init (op1);
  mpz_init (op2);

  fp = fopen (FILENAME, "w+"); 

  for (i = 0; i < reps; i++)
    {
      mpz_urandomb (bs, rands, 32);
      size_range = mpz_get_ui (bs) % 10 + 2;

      mpz_urandomb (bs, rands, size_range);
      size = mpz_get_ui (bs);
      mpz_rrandomb (op1, rands, size);
      mpz_urandomb (bs, rands, 1);
      bsi = mpz_get_ui (bs);
      if ((bsi & 1) != 0)
	mpz_neg (op1, op1);

      mpz_urandomb (bs, rands, 16);
      bsi = mpz_get_ui (bs);
      base = bsi % 36 + 1;
      if (base == 1)
	base = 0;

      rewind (fp);  
      if (mpz_out_str (fp, base, op1) == 0
          || putc (' ', fp) == EOF
          || fflush (fp) != 0)
        {
          printf ("mpz_out_str write error\n");
          abort ();
        }

      rewind (fp);  
      nread = mpz_inp_str (op2, fp, base);
      if (nread == 0)
        {
          if (ferror (fp))
            printf ("mpz_inp_str stream read error\n");
          else
            printf ("mpz_inp_str data conversion error\n");
	  abort ();
	}

      if (nread != ftell(fp))
        {
          printf ("mpz_inp_str nread doesn't match ftell\n");
          printf ("  nread  %u\n", nread);
          printf ("  ftell  %ld\n", ftell(fp));
          abort ();
        }

      if (mpz_cmp (op1, op2))
	{
	  printf ("ERROR\n");
	  printf ("op1  = "); debug_mp (op1, -16);
	  printf ("op2  = "); debug_mp (op2, -16);
	  printf ("base = %d\n", base);
	  abort ();
	}
    }

  fclose (fp);

  unlink (FILENAME);

  mpz_clear (bs);
  mpz_clear (op1);
  mpz_clear (op2);

  tests_end ();
  exit (0);
}
