/* Test mpz_inp_str.

Copyright 2001, 2002 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>
#include <string.h>
#if HAVE_UNISTD_H
#include <unistd.h>		/* for unlink */
#endif

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


#define FILENAME  "t-inp_str.tmp"


void
check_data (void)
{
  static const struct {
    const char  *inp;
    int         base;
    const char  *want;
    int         want_nread;

  } data[] = {

    { "0",   10, "0", 1 },

    { "abc", 10, "0", 0 },
    { "ghi", 16, "0", 0 },

    {  "ff", 16,  "255", 2 },
    { "-ff", 16, "-255", 3 },
    {  "FF", 16,  "255", 2 },
    { "-FF", 16, "-255", 3 },

    { "z", 36, "35", 1 },
    { "Z", 36, "35", 1 },

    {  "0x0",    0,   "0", 3 },
    {  "0x10",   0,  "16", 4 },
    { "-0x0",    0,   "0", 4 },
    { "-0x10",   0, "-16", 5 },

    {  "00",   0,  "0", 2 },
    {  "010",  0,  "8", 3 },
    { "-00",   0,  "0", 3 },
    { "-010",  0, "-8", 4 },

    {  "0x",     0,   "0", 2 },
    {  "0",      0,   "0", 1 },
  };

  mpz_t  got, want;
  long   ftell_nread;
  int    i, pre, post, j, got_nread, want_nread;
  FILE   *fp;

  mpz_init (got);
  mpz_init (want);

  for (i = 0; i < numberof (data); i++)
    {
      for (pre = 0; pre <= 3; pre++)
        {
          for (post = 0; post <= 2; post++)
            {
              mpz_set_str_or_abort (want, data[i].want, 0);
              MPZ_CHECK_FORMAT (want);

              /* create the file new each time to ensure its length is what
                 we want */
              fp = fopen (FILENAME, "w+");
              ASSERT_ALWAYS (fp != NULL);
              for (j = 0; j < pre; j++)
                putc (' ', fp);
              fputs (data[i].inp, fp);
              for (j = 0; j < post; j++)
                putc (' ', fp);
              fflush (fp);
              ASSERT_ALWAYS (! ferror(fp));

              rewind (fp);
              got_nread = mpz_inp_str (got, fp, data[i].base);

              if (got_nread != 0)
                {
                  ftell_nread = ftell (fp);
                  if (got_nread != ftell_nread)
                    {
                      printf ("mpz_inp_str nread wrong\n");
                      printf ("  inp          \"%s\"\n", data[i].inp);
                      printf ("  base         %d\n", data[i].base);
                      printf ("  pre          %d\n", pre);
                      printf ("  post         %d\n", post);
                      printf ("  got_nread    %d\n", got_nread);
                      printf ("  ftell_nread  %ld\n", ftell_nread);
                      abort ();
                    }
                }

              /* if data[i].inp is a whole string to read and there's no post
                 whitespace then expect to have EOF */
              if (post == 0 && data[i].want_nread == strlen(data[i].inp))
                {
                  int  c = getc(fp);
                  if (c != EOF)
                    {
                      printf ("mpz_inp_str didn't read to EOF\n");
                      printf ("  inp   \"%s\"\n", data[i].inp);
                      printf ("  base  %d\n", data[i].base);
                      printf ("  pre   %d\n", pre);
                      printf ("  post  %d\n", post);
                      printf ("  c     '%c' %#x\n", c, c);
                      abort ();
                    }
                }

              /* only expect "pre" included in the count when non-zero */
              want_nread = data[i].want_nread;
              if (want_nread != 0)
                want_nread += pre;

              if (got_nread != want_nread)
                {
                  printf ("mpz_inp_str nread wrong\n");
                  printf ("  inp         \"%s\"\n", data[i].inp);
                  printf ("  base        %d\n", data[i].base);
                  printf ("  pre         %d\n", pre);
                  printf ("  post        %d\n", post);
                  printf ("  got_nread   %d\n", got_nread);
                  printf ("  want_nread  %d\n", want_nread);
                  abort ();
                }

              MPZ_CHECK_FORMAT (got);
      
              if (mpz_cmp (got, want) != 0)
                {
                  printf ("mpz_inp_str wrong result\n");
                  printf ("  inp   \"%s\"\n", data[i].inp);
                  printf ("  base  %d\n", data[i].base);
                  mpz_trace ("  got ",  got);
                  mpz_trace ("  want", want);
                  abort ();
                }

              ASSERT_ALWAYS (fclose (fp) == 0);
            }
        }
    }

  mpz_clear (got);
  mpz_clear (want);
}

int
main (void)
{
  tests_start ();

  check_data ();

  unlink (FILENAME);
  tests_end ();
  exit (0);
}
